JP3291423B2 - Display panel mounting method and mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display panel such as a liquid crystal panel, and more particularly to a mounting method and a mounting structure thereof, and more particularly, to a method and a structure for mounting a display device using a display panel in a small size.

[0002]

2. Description of the Related Art FIG. 26 is a perspective view showing a mounting structure of a typical prior art liquid crystal panel 1, and FIG.
FIG. 7 is a cross-sectional view taken along line XXVII-XXVII of FIG. The liquid crystal panel 1 is generally configured by sealing a liquid crystal 4 between two glass substrates 2 and 3. A plurality of linear patterns made of a transparent conductive material (for example, indium-tin oxide: abbreviated as ITO) are arranged on the surface of each of the glass substrates 2 and 3, and a plurality of electrodes 5 and 6 are formed, respectively. The electrode 5 of one glass substrate 2 and the electrode 6 of the other glass substrate 3 are formed so as to intersect. By applying a voltage between the electrodes 5 and 6 of these glass substrates 2 and 3, the liquid crystal 4 is aligned and the display panel 1 is driven. Such a liquid crystal panel 1 is called a simple matrix driven liquid crystal panel.

[0003] Edge portions 2 adjacent to each other of a liquid crystal panel 1
Transparent electrode terminals 7 connected to the electrodes 5 and 6 made of the transparent conductive material are disposed at the terminals a and 3a. LCD panel 1
The driving integrated circuit 8 for driving is provided in a state where it is mounted on the flexible wiring board 9 in advance. This is a Tape Carriar Package (abbreviated TCP)
10). Such TCP10
Is arranged so that an output terminal 11 formed at one end thereof is electrically connected to the electrode terminal 7 by, for example, an anisotropic conductive film 12 and extends outward from the edges 2a and 3a of the liquid crystal panel 1. Is done.

[0004] Wiring boards 13 and 14 for receiving signals from the outside consist of terminals 18a of wiring 18 formed on the wiring boards 13 and 14, and input terminals 17 formed at the other end of the TCP 10. Provided electrically connected,
It is arranged further outside the TCP 10. Each of the wiring boards 13 and 14 is electrically connected to each other by a connection wiring board 15, and is connected to a flexible wiring board 16 serving as a connector.
It is electrically connected to a main board (not shown) on which a PU (Central Processing Unit) and the like are mounted. A signal supplied to the wiring boards 13 and 14 through the flexible wiring board 16 is transmitted to the electronic component 20 mounted on the wiring boards 13 and 14, the wiring 18, and the TCP 10 via the input terminal 17 of the TCP 10.
10 is input to the driving integrated circuit 8 and the driving integrated circuit 8
Output terminal 1 corresponding to the signal from the main board.
1. The voltage is applied between the electrodes 5 and 6 via the electrode terminals 7 of the liquid crystal panel 1. Thus, the liquid crystal panel 1 is driven.

The advantage of a liquid crystal display device is that it is small, thin, and lightweight. Despite being expensive for CRTs (Cathode Ray Tubes), they are now becoming alternatives to CRTs in order to meet the demand for lighter, thinner and smaller displays in the market for display devices. Further reduction in size, weight and thickness of the device is required.

In the above-described structure of the prior art, the TCP 10 is provided on the side of the liquid crystal panel 1 and the wiring boards 13 and 14 are arranged separately from the liquid crystal panel 1 via the TCP 10. The size of the entire display device increases. FIG. 28 is a front view showing a mounting structure of the conventional liquid crystal panel 1, FIG. 29 is a rear view showing the liquid crystal panel 1 from behind, and FIG. 30 is a front view showing a liquid crystal display device 22 including the liquid crystal panel 1. FIG. In order to solve the problem that the overall size of the liquid crystal display device becomes large as described above, for example, in a liquid crystal display device for a portable information device that requires a relatively large screen for a pen input function, FIGS. As shown in FIG. 30, by utilizing the flexibility of the TCP 10 connected to the liquid crystal panel 1, for example, at one edge 3a, the T is electrically connected to the connection terminal 7.
The CP 10 is bent near the edge 3 a of the liquid crystal panel 1, and a wiring board 21 for receiving a signal is arranged behind the display panel 1, and is electrically connected to the connection terminal 7 at the other edge 2 a. By adopting a method of electrically connecting the TCP 10 and the wiring board 21, the TCP 10 on one side
The liquid crystal display device 22 using the liquid crystal panel 1 is reduced in size. In the prior art shown in FIGS. 28 to 30, portions having the same configuration as those in FIGS. 26 and 27 are denoted by the same reference numerals, and description thereof will be omitted to avoid duplication.

Another prior art is disclosed in Japanese Patent Application Laid-Open No. 6-22 / 1994.
In the technique disclosed in Japanese Patent No. 3896, a connection terminal connected to an electrode and a circuit wiring for receiving a signal from a main body substrate are electrically insulated on a peripheral portion of a display panel with an insulating layer interposed therebetween to form two layers. The relay terminal is provided in an overlapped state, and a relay terminal electrically connected to the circuit wiring is provided at a predetermined position through the insulating layer. These electrode terminals and relay terminals are electrically connected to input terminals and output terminals which are wirings provided on one side of the TCP. With this configuration,
A wiring board for receiving signals from the main body substrate is not required, so that the liquid crystal display device is miniaturized and the number of components is reduced. Still another conventional technique is the actual fairness 6
According to the technique disclosed in Japanese Patent Application Laid-Open No. 48541/1990, a part for newly developing a wiring board required for driving a liquid crystal panel is divided into an existing part, and these common signal wiring boards are divided into a liquid crystal display panel. The liquid crystal display device is configured to be miniaturized by disposing the liquid crystal display device behind.

[0008]

In the prior art shown in FIGS. 26 and 27, the TCP 10 and the wiring board 1 described above are used.
The liquid crystal display device is increased in size due to 3 and 14. In order to cope with this, in the prior art shown in FIGS. 28 to 30, the wiring board 21 is arranged behind the display panel 1 by utilizing the flexibility of the TCP 10, so that mounting which is advantageous in terms of manufacturing cost can be performed. Although it is possible, the TCP 10 on one side protrudes outward from the peripheral portion of the liquid crystal panel 1, and
The liquid crystal display device is enlarged for 10 minutes, and there is room for further miniaturization. In the prior art disclosed in JP-A-6-223896, the size of the liquid crystal display device is made substantially the same as the size of the liquid crystal panel by folding the TCP in the same manner as in the prior art shown in FIGS. Although it is possible, a liquid crystal panel using a special structure in which the peripheral portion has a two-layer wiring is required. However, a method of manufacturing such a liquid crystal panel is not disclosed in the above-mentioned publication, and is not feasible. Even if it can be manufactured, a liquid crystal panel having such a structure requires a considerable manufacturing cost. In the prior art disclosed in Japanese Utility Model Publication No. 6-48541, it is possible to manufacture a liquid crystal display device having substantially the same size as the liquid crystal panel by disposing a wiring board behind the liquid crystal panel. Does not show its mounting method.When connecting wiring behind a liquid crystal panel, for example, when soldering is used, temperature rise due to heat for melting solder, anisotropic When a conductive film is used, the liquid crystal panel may be damaged by pressure or the like, and it is difficult to manufacture a liquid crystal display device.

Accordingly, an object of the present invention is to provide a mounting structure and a mounting method of a display panel which can manufacture a liquid crystal display device in a small size without increasing the manufacturing cost.

[0010]

[0011]

[0012]

[0013]

SUMMARY OF THE INVENTION The present invention is directed to a first and a second arrangement arranged in first and second intersecting directions.
One end of the first and second flexible wiring boards on which the drive integrated circuit for driving the display panel is mounted are connected to the first and second connection terminals of the display panel in which the connection terminals are formed on the periphery. A second flexible wiring board, which is electrically connected to each other and extends along the first arrangement direction, is electrically connected to the other end of the first flexible wiring board; A second back connection wiring board extending along the second arrangement direction is electrically connected to the other end of the flexible wiring board, and the other end of the first flexible wiring board and the first back connection wiring are provided. The first flexible wiring substrate is bent so that the substrate is located behind the display panel, and the second wiring substrate in the first arrangement direction of the first rear connection wiring substrate is bent.
A portion closer to the back connection wiring board and a portion closer to the first back connection wiring board in the second arrangement direction of the second back connection wiring board are opposed to each other outside the display panel to be electrically connected; A display panel mounting method, wherein the second flexible wiring board is bent so that the other end of the second flexible wiring board and the second back connection wiring board are located behind the display panel. is there. According to the present invention, a first integrated circuit for driving a display panel is mounted on first and second connection terminals formed in first and second arrangement directions crossing each other at a peripheral portion of the display panel. And one end of the second flexible wiring board are electrically connected. Next, a first back connection wiring board having flexibility is electrically connected to the other end of the first flexible wiring board, and a second back connection is used to the other end of the second flexible wiring board. The wiring board is electrically connected. Next, the first flexible wiring board is bent so that the other end of the first flexible wiring board and the first back connection wiring board are located behind the display panel, and the first back connection wiring board and The second connection wiring board is opposed to and electrically connected to the outside of the display panel. The second flexible wiring board is bent so that the other end of the second flexible wiring board and the second back connection wiring board are located behind the display panel. Thereby, the connection between the first flexible wiring board and the first back connection wiring board,
The connection between the flexible wiring board and the second back connection wiring board and the connection between the first back connection wiring board and the second back connection wiring board are performed in a region outside the display panel, and The other end of the second flexible wiring board and the first and second wiring boards for connection behind can be mounted behind the display panel. Therefore, the display panel can be mounted without damaging the display panel. In addition, pressure can be applied at the time of connection, and connection can be made without using solder. In addition, since the first and second wiring boards for back connection are separately provided and connected,
Only the first back connection wiring board can be a flexible wiring board and a single-sided wiring, so that material costs can be reduced and manufacturing costs can be reduced. First
A part of the rear connection wiring board can be pulled out to be used as a connector of the main body board, and the number of components can be reduced as compared with a case where a connector is provided separately.

According to the present invention, there is provided a display panel according to the present invention, wherein first and second connection terminals arranged in mutually intersecting first and second arrangement directions are formed on a peripheral portion.
One end of the first and second flexible wiring boards on which the driving integrated circuit for driving the display panel is mounted are electrically connected to the connection terminals, respectively, and the other end of the first flexible wiring board is connected to the other end of the first flexible wiring board. A rigid second back wiring board extending along the first arrangement direction is electrically connected to the rigid first back connection wiring board extending along the first arrangement direction, and a second rigid back side extending along the second arrangement direction at the other end of the second flexible wiring board. The connection wiring board may be electrically connected, and may extend toward the first back connection wiring board at an end of the second back connection wiring board near the first back connection wiring board in the second arrangement direction. One end of the third back wiring board having flexibility is electrically connected so that the other end of the second flexible wiring board and the second back wiring board are located behind the display panel. The second flexible wiring board is bent, and the other end of the third back connection wiring board is connected to the first back connection. An end portion of the first wiring board which is closer to the second rear connection wiring board in the first arrangement direction, facing the outside of the display panel, and electrically connected to the other end of the first flexible wiring board. A method for mounting a display panel, comprising bending a first flexible wiring board so that the rear connection wiring board is located behind the display panel, and bending a third rear connection wiring board. According to the present invention, first and second connection terminals formed on the periphery of the display panel are connected to one end of the first and second flexible wiring boards on which a drive integrated circuit for driving the display panel is mounted. Are electrically connected. Next, a rigid first back connection wiring board is electrically connected to the other end of the first flexible wiring board, and a rigid second back connection wiring is connected to the other end of the second flexible wiring board. The board is electrically connected. One end of a flexible third back connection wiring board extending toward the first back connection wiring board is electrically connected to the second back connection wiring board;
The second flexible wiring board is bent so that the other end of the flexible wiring board and the second back connection wiring board are located behind the display panel, and the other end of the third back connection wiring board is First
The wiring board for back connection is electrically connected to the outside of the display panel so as to face the outside of the display panel, and the other end of the first flexible wiring board and the first wiring board for back connection are located behind the display panel. The first flexible wiring board is bent, and the third back connection wiring board is bent. Thereby, the connection between the wiring boards can be made in the area outside the display panel, and then the wiring board can be located behind the display panel, so that the respective wiring boards can be interconnected without damaging the display panel. , Can be mounted behind the display panel. In addition, pressure can be applied at the time of connection, and connection can be performed without using solder. In addition, the first and second rear connection wiring boards can be rigid boards, and the dimensions of the flexible rear connection wiring boards can be reduced.
Material costs can be reduced.

Further, according to the present invention, the first and second connection terminals of the display panel in which the first and second connection terminals arranged in the first and second arrangement directions intersecting each other are formed on the peripheral portion.
One end of the first and second flexible wiring boards on which the driving integrated circuit for driving the display panel is mounted are electrically connected to the connection terminals, respectively, and the other end of the first flexible wiring board is connected to the other end of the first flexible wiring board. A rigid second back wiring board extending along the first arrangement direction is electrically connected to the rigid first back connection wiring board extending along the first arrangement direction, and a second rigid back side extending along the second arrangement direction at the other end of the second flexible wiring board. Connecting the connection wiring board, and connecting the second wiring board
One end of a flexible third back connection wiring board extending toward the first back connection wiring board is electrically connected to an end near the first back connection wiring board in the arrangement direction. The first flexible wiring board is bent so that the other end of the flexible wiring board and the first back connection wiring board are located behind the display panel, and the other end of the second flexible wiring board and The second flexible wiring board is bent so that the second back connection wiring board is located behind the display panel, and the other end of the third back connection wiring board is connected to the first back connection wiring board. A display panel mounting method characterized in that the display panel is connected so as to face the outside of the display section of the display panel. According to the present invention, first and second connection terminals formed on the periphery of the display panel are connected to one end of the first and second flexible wiring boards on which a drive integrated circuit for driving the display panel is mounted. Are electrically connected to each other. Next, a rigid first back connection wiring board is electrically connected to the other end of the first flexible wiring board, and a second back connection wiring board is connected to the other end of the second flexible wiring board. Make an electrical connection. Next, one end of a flexible third back connection wiring board is electrically connected to the second back connection wiring board, and the other end of the first flexible wiring board and the first back connection are connected. The first flexible wiring board is bent so that the wiring board is located behind the display panel. Next, the second flexible wiring board is bent so that the other end of the second flexible wiring board and the second back connection wiring board are positioned behind the display panel, and the third flexible wiring board is bent.
The other end of the back connection wiring board and the first back connection wiring board are opposed to each other outside the display section of the display panel and are electrically connected. Thus, the wiring board can be connected without affecting the display section of the liquid crystal panel and damaging the display section, and the wiring board can be mounted behind the display panel. In addition, pressure can be applied at the time of connection, and connection can be performed without using solder. In addition, the third back connection wiring board can electrically connect the first and second back connection wiring boards without being bent, and the second back connection wiring board can be reduced in size. Therefore, the material cost of the third back connection wiring board can be reduced.

[0016]

Further, the present invention provides a display panel in which first and second connection terminals arranged in the first and second arrangement directions intersecting with each other are formed on a peripheral portion, and one end of the first connection terminal has one end. A first flexible wiring board that is electrically connected and has flexibility and is bent so that the other end is located behind the display panel; and one end is electrically connected to the second connection terminal. A second flexible wiring board having flexibility and being curved so that the other end is located behind the display panel, and mounted on the first and second flexible wiring boards to drive the display panel A driving integrated circuit, which is disposed behind the display panel, and has a generally L-shaped overall shape, one piece extending in the first arrangement direction and the other piece extending in the second arrangement direction. Are connected by a flexible connecting portion and are connected to the main body substrate. A connecting portion, which is bent with a vertically overlapping portion in the connecting portion, one end of which is electrically connected to the other end of the first flexible wiring board, and the other of which is electrically connected to the other end of the second flexible wiring board; A mounting structure of the display panel, characterized in that the end portion includes a common wiring board electrically connected to the other piece.
According to the invention, the display panel has the first and second connection terminals formed on the peripheral edge, and the first and second connection terminals are electrically connected to one end of the first and second flexible wiring boards. Connected respectively. The first and second flexible wiring boards each have flexibility, and are each curved such that the other end is located behind the display panel. As described above, the drive integrated circuits for driving the display panel are mounted on the first and second flexible wiring boards. A substantially L-shaped common wiring board is provided behind the display panel, and the common wiring board has one and the other connected by a flexible connecting portion. It has a vertically overlapping portion and is bent. Thus, the other end of the first flexible wiring substrate is electrically connected to one end of the common wiring substrate, and the other end of the second flexible wiring substrate is electrically connected to the other end. . Thus, the first and second flexible wiring boards and the common wiring board can be arranged and mounted behind the display panel. Therefore, the display panel can be mounted in a small size. In addition, the common wiring board has a connection portion, and this connection portion can be used as a connector with the main body substrate, so that it is possible to eliminate the trouble of providing a separate connector and connecting, reducing the number of steps, and reducing the connection cost. Can be reduced.

According to the present invention, there is provided a display panel having first and second connection terminals arranged in a peripheral portion, the first and second connection terminals being arranged in mutually intersecting first and second arrangement directions, and one end of the first connection terminal being electrically connected. A first flexible wiring board that is electrically connected, has flexibility, and is curved so that the other end is located behind the display panel, and one end is electrically connected to the second connection terminal; A second flexible wiring board that is flexible and curves so that the other end is located behind the display panel, and is mounted on the first and second flexible wiring boards to drive the display panel A driving integrated circuit, disposed behind the display panel, having flexibility,
It has a longitudinal shape extending in the arrangement direction, and is bent and bent along the first arrangement direction so that one end in the first arrangement direction overlaps vertically, and the other end of the first flexible wiring board is electrically connected. A first rear connection wiring board to be connected, and an end disposed closer to the first rear connection wiring board, which is disposed behind the display panel, is rigid, has a longitudinal shape extending in the second arrangement direction, and is closer to the first rear connection wiring board in the second arrangement direction. A second back connection in which a portion is electrically connected to the bent one end of the first back connection wiring board and the other end of the second flexible wiring board is electrically connected. A display panel mounting structure including a wiring board. According to the present invention, the display panel has first and second connection terminals formed at the peripheral portion thereof, and the first and second connection terminals are each provided with a drive integrated circuit for driving the display panel. One ends of the first and second flexible wiring boards are electrically connected. These first and second
The flexible wiring boards each have flexibility, and are curved such that the other end is located behind the display panel. In addition, a flexible first rear connection wiring board is disposed behind the display panel. In addition, a rigid, elongated second connection wiring board is disposed behind the display panel, and is electrically connected to the other end of the second flexible wiring board. The first back connection wiring board is bent and folded so that one end thereof is vertically overlapped, and a second back connection wiring board is opposed to and electrically connected to this one end. Thus, the first and second flexible wiring boards and the first and second rear connection wiring boards are arranged behind the display panel, and the display panel can be mounted in a small size.

The present invention also provides a display panel in which first and second connection terminals arranged in the first and second arrangement directions intersecting each other are formed on a peripheral portion, and one end is electrically connected to the first connection terminal. A first flexible wiring board that is electrically connected, has flexibility, and is curved so that the other end is located behind the display panel, and one end is electrically connected to the second connection terminal; A second flexible wiring board that is flexible and bends so that the other end is located behind the display panel, and mounted on the first and second flexible wiring boards to drive the display panel A first back connection, which is disposed behind the driving integrated circuit and the display panel, is rigid, has a longitudinal shape extending in the first arrangement direction, and is electrically connected to the other end of the first flexible wiring board; Wiring board,
A second rear connection wiring board, which is disposed behind the display panel, is rigid, has a longitudinal shape extending in the second arrangement direction, and is electrically connected to the other end of the second flexible wiring board; It is arranged behind the display panel, has flexibility, is folded back along the second arrangement direction, is bent substantially in a U-shape, and has one end at the second back of the first back connection wiring board. The other end is electrically connected to the end near the connection wiring board, and the other end is opposed to the end near the first back connection wiring board of the second back connection wiring board. And a third back connection wiring board. According to the present invention, the display panel has first and second connection terminals formed at the periphery thereof, and the first and second connection terminals have a drive integrated circuit for driving the display panel mounted thereon. The first and second flexible wiring boards are electrically connected. Such first and second flexible wiring boards each have flexibility, and are each curved such that the other end is located behind the display panel. Behind the display panel, a rigid and long first rear connection wiring board is electrically connected to the other end of the first flexible wiring board. A rigid and long second rear connection wiring board is disposed behind the display panel, and is electrically connected to the other end of the second flexible wiring board. In addition, a third rear connection wiring substrate having flexibility is arranged behind the display panel. This third back connection wiring board is bent substantially in a U-shape,
The other end portion is opposed to and electrically connected to the rear connection wiring substrate, and the other end portion is opposed to and electrically connected to the second rear connection wiring substrate. Thus, the first and second flexible wiring boards and the first to third rear connection wiring boards are arranged behind the display panel, so that the display panel can be mounted in a small size.

Further, the third back connection wiring board of the present invention is characterized in that it has a connection portion protruding in a direction away from the first back connection wiring board in the first arrangement direction.
According to the present invention, the third back connection wiring board has a connection portion protruding in a direction away from the first back connection wiring board. As a result, this connection portion can be used as a connector for connection to the main body substrate, and there is no need to separately provide a connector, no connection process for the connector is required, and the number of processes can be reduced, and manufacturing costs can be reduced. Can be reduced.

Further, the present invention provides a display panel in which first and second connection terminals arranged in first and second arrangement directions intersecting each other are formed on a peripheral portion, and one end of the first connection terminal is electrically connected. A first flexible wiring board that is electrically connected, has flexibility, and is curved so that the other end is located behind the display panel, and one end is electrically connected to the second connection terminal; A second flexible wiring board that is flexible and bends so that the other end is located behind the display panel, and mounted on the first and second flexible wiring boards to drive the display panel A first back connection, which is disposed behind the driving integrated circuit and the display panel, is rigid, has a longitudinal shape extending in the first arrangement direction, and is electrically connected to the other end of the first flexible wiring board; Wiring board,
A second rear connection wiring board, which is disposed behind the display panel, is rigid, has a longitudinal shape extending in the second arrangement direction, and is electrically connected to the other end of the second flexible wiring board; It is disposed behind the display panel, has flexibility, and has one end at the second end.
An end of the rear connection wiring board close to the first rear connection wiring board is opposed and electrically connected, and the other end is opposed to the first rear connection wiring board outside the display section of the display panel. And a third wiring board for rear connection that is electrically connected to the display panel.
According to the present invention, first and second connection terminals are formed on a peripheral portion of the display panel, and the first and second connection terminals are provided with a first integrated circuit on which a drive integrated circuit for driving the display panel is mounted.
And the second flexible wiring board are electrically connected to each other, the first and second flexible wiring boards have flexibility, and the other ends thereof are located behind the display panel. Each is curved. A rigid and long first rear connection wiring board is disposed behind the display panel, and is electrically connected to the other end of the first flexible wiring board. A rigid and long second rear connection wiring board is disposed behind the display panel, and is electrically connected to the other end of the second flexible wiring board. Further, a flexible third back connection wiring board is disposed behind the display panel, one end of which is electrically connected to the second back connection wiring board, and the other end of which is connected to the display panel. And is electrically connected to the first rear connection wiring board outside the display section. Thus, the first and second flexible wiring boards and the first to third rear connection wiring boards are arranged behind the display panel, and the display panel can be mounted in a small size.

In the above configuration, the first and second rear connection wiring boards have been specifically described with respect to a method and a configuration, but the first and second rear connection wiring boards are opposite to the above configuration. The configuration is also included in the spirit of the present invention. The above connection cost includes, for example, a material cost, a labor cost, a cost for operating the device, and the like of a solder anisotropic conductive film used at the time of connection.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a rear view showing a mounting structure of a liquid crystal panel 30 for explaining an embodiment of the present invention as viewed from the rear side, and FIG. 2 is a sectional view taken along a line II--II of FIG. FIG. 3 is a cross-sectional view as viewed from II, and FIG.
It is sectional drawing seen from -III. A liquid crystal panel 30 serving as a display panel is a liquid crystal panel driven by a simple matrix, and a liquid crystal 34 is sealed between two glass substrates 31 and 32 by a sealing member 33 made of, for example, a photocurable resin. On the surface of one glass substrate 31, a plurality of first transparent electrodes 35 made of indium tin oxide and extending in the left-right direction of FIG. 1 are spaced from each other in the first arrangement direction A, which is the vertical direction of FIG. It is formed so as to be open. First connection terminals 36 serving as connection terminals of the first transparent electrode 35 are formed on one side edge 31a of the glass substrate 31 which is the periphery of the display panel 30 at intervals in the first arrangement direction A. Is done. The first connection terminal 36 is arranged on the depth side with respect to the paper surface of the glass substrate 31 in FIG.

On the surface of the other glass substrate 32, a plurality of second transparent electrodes 37 made of the above-mentioned indium tin oxide and extending in the vertical direction of FIG. They are formed so as to be spaced from each other in a second arrangement direction B crossing the direction A. Second connection terminals 38, which are connection terminals of the second transparent electrode 37, are formed at one side edge 32a of the glass substrate 32, which is the periphery of the display panel 30, at intervals from one another in the second arrangement direction B. Is done. The second connection terminal 38 is formed on the near side with respect to the paper surface of the glass substrate 32 in FIG. 1 of FIG.
One of the second transparent electrodes 35 and 37 is a common electrode, and the other is a segment electrode.
By applying a voltage between the first and second electrodes 35 and 37, the liquid crystal 34 is aligned and the display panel 30 is driven.

The first connection terminal 36 is made of a flexible synthetic resin such as polyimide or polyethylene terephthalate, and is electrically connected to one end 43 of a first flexible wiring board 39 having flexibility. It is connected. The first flexible wiring board 39 has a wiring 42 formed by a conductor on one surface thereof.
The third connection terminal 44, which is a terminal formed at one end 43 of the first flexible wiring board 39, is electrically connected to the first connection terminal 36 by, for example, an anisotropic conductive film 45. As described above, one end 43 of the first flexible wiring board 39 is electrically connected to the first connection terminal 36. The anisotropic conductive film 45 is a film made of a synthetic resin mixed with conductive particles, and is configured to be electrically conductive only in the thickness direction of the film via the conductive particles by being compressed in the thickness direction of the film. Having.

On the first flexible wiring board 39, a driving integrated circuit 40 for driving the display panel 30 is mounted.
P41 is configured. The drive integrated circuit 40 has its connection terminal 40a electrically connected to the connection terminal 42a connected to the wiring 42 of the first flexible wiring board 39 by, for example, solder or the like. 39. Such TCP4
1 uses the flexibility of the first flexible wiring board 39,
The flexible wiring board 39 is bent, and the other end 47 is bent by about 180 ° so as to be located behind the display panel 30 and is curved. Wiring 42 of first flexible wiring board 39
Is formed on the surface on one side in the thickness direction, and at one end 43 of the first flexible wiring board 39, the wiring 42 is on the near side in FIG. Then, as described above, they are electrically connected by the anisotropic conductive film 45. The other end 47 of the first flexible wiring board 39
In FIG. 1, the wiring 42 is disposed on the depth side in FIG.

For example, the first connection terminal 38
One end 49 of a flexible second flexible wiring board 48 made of the same synthetic resin as the flexible wiring board 39 is electrically connected. The driving integrated circuit 50 is mounted on the second flexible wiring board 48 in the same manner as the first flexible wiring board 39, and the TCP 51 is configured. TCP51
Has almost the same configuration as TCP41,
Portions having the same configuration are denoted by the same reference numerals, and description thereof will be omitted to avoid duplication. Here, TCP51 and TC
The difference from P41 is that the TCP 41 is bent with the wiring 42 of the first flexible wiring board 39 inside as shown in FIG. 2, while the TCP 51 is bent as shown in FIG.
The point is that the wiring 151 is bent with the wiring 151 of the flexible wiring board 48 facing outward. Here, the seventh connection terminal 152 connected to the wiring 151 formed on the second flexible wiring board 48 and formed at one end 49 is formed by the
It is electrically connected to the connection terminal 38.

Also, behind the liquid crystal panel 30, that is, in FIG.
On the front side, a common wiring board 52 whose overall shape is substantially L-shaped is arranged. The common wiring board 52 is a rigid double-sided wiring board made of, for example, glass epoxy obtained by impregnating glass fiber woven fabric with epoxy resin or paper phenol obtained by impregnating paper with phenol resin. One piece 53 extending along
And the other piece 54 extending along the second arrangement direction B, which is a direction intersecting with the one piece 53, are connected by a connecting portion 55. One piece 53 of this common wiring board 52
The fourth connection terminal 56 which is a connection terminal formed at the other end of the first flexible wiring board 39 of the TCP 41 is solder 5
7 are electrically connected. Here, in FIG. 1, the fifth connection terminal 56 is a connection terminal that is located on the depth side of the first flexible wiring board 39 and is connected to the wiring 59 formed on the front side of the common wiring board 52. Terminal 5
8 is connected. Here, in FIG. 2, although the wiring 42 of the flexible wiring board 39 and the wiring 59 formed on the common wiring board 52 are shown to face each other, actually, the first flexible Wiring 4 of the flexible wiring board 39
2 and the wiring 59 of the common wiring board 52 are formed so as not to be opposed to each other. Also, the first flexible wiring board 39
An insertion hole 60 facing the fifth connection terminal 58 is formed in the other end portion 47 of the, so that alignment can be easily performed when the fourth connection terminal 56 and the fifth connection terminal 58 are connected,
Further, the soldering process can be easily performed at the time of soldering.

The solder used for the aforementioned soldering is as follows.
For example, it is a eutectic solder of 37% lead (Pb) and 63% tin (Sn). In addition to this, a solder in which lead is reduced or a so-called Pb-free solder in which lead is completely eliminated from the environment is used. You may.

The other piece 54 of the common wiring board 52 is a TCP
The sixth connection terminal 61, which is a connection terminal formed on one end 49 of the second flexible wiring board 48 of 51, is electrically connected by solder 57. The connection between the other piece 54 and the other end 62 of the second flexible wiring board 48 has the same configuration as that of the connection between the one piece 53 and the other end 47 of the first flexible wiring board 39. Description is omitted for avoidance. Due to the wiring of the second flexible wiring board 48, the wiring 5 formed on the depth side in FIG.
9 is connected. Such a common wiring board 52 includes a connector 63 constituted by a flexible wiring board.
The connector 63 is connected to a substrate (not shown) for supplying a signal representing a character, a number, a design, or the like to be displayed by the liquid crystal panel 30.

As a result, a signal representing a character, a number or a pattern to be displayed by the liquid crystal panel 30 from the substrate of the main body is guided to the common wiring board 52 via the connector 63 and is given to the drive integrated circuits 40 and 50. A signal applied to each of the drive integrated circuits 40 and 50 is applied to the first and second transparent electrodes 35 and 37 and applied between the first and second transparent electrodes 35 and 37. In this manner, the liquid crystal panel 30 is driven, and the above-described characters, numbers, and patterns to be displayed are displayed on the surface of the liquid crystal panel 30 that is on the depth side with respect to the plane of FIG.

By mounting the liquid crystal panel 30 in such a configuration, the TCPs 41 and 51 and the common wiring board 52 can be arranged and mounted behind the liquid crystal panel 30, and the liquid crystal panel 30 can be mounted in a small size. be able to. Therefore, by configuring a liquid crystal display device using such a liquid crystal panel 30, the size of the entire liquid crystal display device can be reduced and manufactured. Further, by configuring the common wiring board 52 in an L-shape, the dimensions of the common wiring board 52 can be reduced as much as possible,
Material costs can be reduced, and manufacturing costs can be reduced.

Next, the liquid crystal panel 30 mounted as described above
How to implement is described. First, as shown in FIG. 4, a first liquid crystal panel 30 configured as described above is formed.
One end portions 43, 49 of first and second flexible wiring boards 39, 48 on which drive integrated circuits 40, 50 for driving the display panel 30 are mounted on the second connection terminals 36, 38, respectively.
Are electrically connected by an anisotropic conductive film 45. The connection between the first and second connection terminals 36, 38 and the first and second flexible wiring boards 39, 48 is connected in the arrangement described above with reference to FIGS.

Next, the common wiring board 52 is displayed with one piece 53 extending along the first arrangement direction A, the other piece 54 extending along the second arrangement direction B, and one piece 53 displayed with respect to the other piece 54. It is arranged to extend in a direction away from the panel 30. In such a state, the common wiring board 52 is positioned behind the second flexible wiring board 48, that is, as shown in FIG. A sixth connection terminal 61 formed on the other end 62 of the second flexible wiring board 48 and a connection terminal (not shown) connected to a wiring 59 formed on the common wiring board 52 are arranged so that the piece 54 is positioned. Are electrically connected by soldering. A connector 63 connected to a main body substrate (not shown) is electrically connected to the common wiring board 52 in advance using solder or the like. As described above, the electrical connection between the second flexible wiring board 48 and the common wiring board 52 is made outside the display panel 30, so that the liquid crystal panel 30 is damaged by the action of heat and pressure accompanying the soldering. It can be connected without. Moreover, the liquid crystal panel 30
Since the connection work can be performed in a wide place without being disturbed by other components such as the first flexible wiring board 39 and the like, the workability is excellent.

Thereafter, the other end 62 of the common wiring board 52 and the second flexible wiring board 48 is located behind the display panel 30 as shown in FIG. 5, that is, in FIG.
The second flexible wiring board 48 is bent by about 180 ° in the vicinity of one side edge 32a of the glass substrate 32 so as to be located on the near side. In this way, the common wiring board 52 is positioned behind the liquid crystal panel 30, and the one piece 53 is arranged along one side edge 31 a of the glass substrate 31. Then T
The CP 41, that is, the first flexible wiring board 39 is bent about 180 ° near the one side edge 31 a so that the other end 47 is located behind the display panel 30. The other end 47 of the first flexible wiring board 39 is located behind the one piece 53, and thereafter, is disposed on the near side of the one piece 53 in FIG. Fifth connection terminal 58 of connection terminal 56 and wiring 59 of common wiring board 52
Are electrically connected by soldering.

At this time, soldering is performed with a heat insulating material 64 interposed between the common wiring board 52 and the liquid crystal panel 30 as shown in FIG. The heat insulating material 64 is a plate member having a thickness of, for example, 0.5 to 1 mm. More specifically, the heat insulating material 64 is a plate member made of stainless steel having a thickness of 0.6 mm or a plate member made of glass epoxy having a thickness of 1 mm. Experiments have confirmed that good soldering can be performed.

Here, the heat insulating material 64 exemplified above is used.
The thickness and material are merely examples, and it is within the spirit of the present invention to appropriately select and use the heat insulating material 64 of another thickness and material. When soldering is performed in this manner, the other end portions 47 and 62 of the first and second flexible wiring boards 39 and 48, and the common wiring board 52 and the liquid crystal panel 30
The temperature of the fourth connection terminal 56 of the first flexible wiring board 39 is set to 210 ° C.
As described above, good soldering can be performed, and the heat generated by the soldering is reduced by the heat insulating material 6.
4 to make it difficult for the liquid crystal panel 30 to be transmitted to the liquid crystal panel 30.
The temperature can be suppressed to 0 ° C. or lower, and the temperature can be prevented from being raised to a temperature at which the liquid crystal panel 30 is damaged. Further, during the soldering process, the pressure applied to the liquid crystal panel 30 can be reduced as much as possible, so that the liquid crystal panel 30 can be prevented from being damaged by the pressure.

By using the heat insulating material 64 in this manner, soldering can be performed behind the liquid crystal panel 30, whereby the one end portions 43, 49 of the first and second flexible wiring boards 39, 48 are provided. In addition, the common wiring board 52 is electrically connected to each other, and can be arranged behind the liquid crystal panel 30, that is, in front of the liquid crystal panel 30 in FIG.
9 and 48 and the common wiring board 52
Is prevented from protruding outside the liquid crystal panel 30, and the liquid crystal panel 30 can be mounted in a small size. Insulation material 6
4 is removed after such soldering is completed, so that the thickness of the liquid crystal display device using the liquid crystal panel 30 does not increase due to the thickness of the heat insulating material 64.

In this embodiment of the present invention, the first and second flexible wiring boards 39 and 48 and the common wiring board 52
First, the second flexible wiring board 48 and the common wiring board 52 are connected as described above, and then, the first flexible wiring board 39 and the common wiring Although it is configured to connect to the substrate 52, as another embodiment of the present invention, first, the first flexible wiring substrate 39 is connected to the common wiring substrate 52, and then the first flexible wiring substrate 39 is connected to the common wiring substrate 52 behind the liquid crystal panel 30. The liquid crystal panel 30 may be configured to connect the flexible wiring board 48 and the common wiring board 52 to each other and to connect the first and second flexible wiring boards 39 and 48 to the common wiring board 52. May be configured to be performed behind the scenes. Even if such a connection method is used, the liquid crystal panel 30 can be mounted in a small size without damaging the liquid crystal panel 30 in the same manner. Moreover,
Each wiring board 39, 4 arranged behind the display panel 30
Since 8, 51 themselves are thin, a small and thin display device can be manufactured without increasing the thickness of the entire display device. Also,
In the case of mounting by such a method, the existing liquid crystal material and mounting device can be used, so there is no need to develop a new material and device, introduction is easy, and the manufacturing cost may increase. Absent.

FIG. 7 is a rear view showing the mounting structure of the liquid crystal panel 70 according to one embodiment of the present invention as viewed from the rear side, and FIG. 8 is a sectional view taken along the line VIII-VIII in FIG. is there. The liquid crystal panel 70 has substantially the same configuration as the liquid crystal panel 30 according to the embodiment of the present invention shown in FIGS. Although the liquid crystal panel 30 has a configuration in which one glass substrate 31 on which the first transparent electrode 35 is formed is disposed behind the other glass substrate 32, the liquid crystal panel 70 has a configuration in which the second transparent electrode 37 is formed. Glass substrate 32 to be formed
Is one glass substrate 31 on which the first transparent electrode 35 is arranged
7, that is, on the near side in FIG. 7. Here, the first transparent electrode 35 is formed on the near side of the glass substrate 31 in FIG. 7, and the second transparent electrode 37 is formed on the depth side of the glass substrate 32 in FIG. Other parts having the same configuration are denoted by the same reference numerals, and description thereof will be omitted.

The TCPs 41 and 51 respectively connected to the first connection terminal 36 and the second connection terminal 38 formed on the liquid crystal panel 70 have substantially the same configuration as the embodiment shown in FIGS. ing. In this embodiment of the present invention, the first flexible wiring board 39 of the TCP 41 is provided so as to be bent with the wiring 42 outside, and the first connection terminal 3
The second flexible wiring board 48 of the TCP 51 is bent and provided with the wiring 65 inside, and is electrically connected to the second connection terminal 38. The other parts have the same configuration, and thus are denoted by the same reference numerals and description thereof will be omitted.

Behind the liquid crystal panel 70, there is arranged a common wiring board 71 whose entire shape is substantially U-shaped. The common wiring board 71 is made of the same synthetic resin as the first and second flexible wiring boards 39 and 48, has flexibility, and has one piece 72 extending in the first arrangement direction A and the second piece 72. The other piece 73 extending in the arrangement direction B is connected to the other piece 73 by a connection part 74. The connection part 74 has flexibility as described above, has a vertically overlapping portion, and has a first arrangement. It is bent along the direction A. One side 7
7, the other end 47 of the first flexible wiring board 39 is disposed on the front side in FIG. 7, and the connection terminal 150 provided on the fourth connection terminal 56 and the wiring 76 formed on the common wiring board 71. And the other end 47 of the first flexible wiring board 39 is electrically connected to the common wiring board 71.

The other end 62 of the second flexible wiring board 48
7 is arranged behind the other piece 73, on the near side in FIG. 7, and connected to the sixth connection terminal 61 formed on the other end 62 and the wiring 76 formed on the common wiring board 71. The connection terminals 77 are electrically connected by the anisotropic conductive film 45, and the other end 62 of the second flexible wiring board 48
And the common wiring board 71 are electrically connected. By making the common wiring board 71 a flexible wiring board in this way, the common wiring board 71 can be bent, and as shown in FIG.
The other end 4 of the first and second flexible wiring boards 39 and 48
The liquid crystal panel 70 can be mounted in a small size by positioning the common wiring boards 7 and 62 and the common wiring board 71 behind the liquid crystal panel 70 so as not to protrude outside the liquid crystal panel 70. Further, since the common wiring board 71 has a structure in which the wirings 76 are formed on both sides thereof, the first and second flexible wiring boards 39 and 48 can be easily connected to both sides of the common wiring board 71. , Workability is improved. Also, in the mounting process, since the mutual connection parts are not limited,
Interconnection, ie, first and second flexible wiring boards 3
Mutual connection between the common wiring boards 71 and 48 and the common wiring board 71 is easy, and mounting of the liquid crystal panel 70 is easy.

Further, in this embodiment of the present invention, the common wiring board 71 has a partially single-sided wiring structure at the connecting portion 74, the flexibility of the connecting portion 74 is improved, and It is easy to bend, and the wiring makes it difficult for the wiring 76 to break.
Further, the common wiring board 71 is provided with one end 73 of the other piece 73.
a protrudes in a direction away from the second flexible wiring board 48 to provide a connection portion 79. The connection portion 79 can be used as a connector with a main body substrate (not shown), and a connector is separately provided. This saves time and effort for connection, reduces the number of steps, and reduces connection cost.

Next, a method for mounting such a liquid crystal panel 70 will be described. First, as shown in FIG. 9, each TCP 4 is attached to the display panel 70 by the same means as in the mounting method of the embodiment of the present invention shown in FIGS.
1, 51 are connected. That is, the first and second connection terminals 36 and 38 formed on the display panel 70 and the fourth connection terminals 56 formed on the other end portions 47 and 62 of the first and second flexible wiring boards 39 and 48, respectively. The seventh connection terminal 152 is electrically connected by the anisotropic conductive film 45. next,
A substantially L-shaped common wiring board 71 is arranged such that one piece 72 extends in the first arrangement direction A.
2 are arranged so as to extend along the second arrangement direction B, and the other piece 73 is arranged so as to extend in a direction away from the liquid crystal panel 70 from the connecting portion 74. This common wiring board 71 is arranged such that one piece 72 is on the rear side of the first flexible wiring board 39, that is, in FIG. 9, the one piece 72 is on the near side of the other end 47 of the first flexible wiring board 39. The fourth connection terminal 56 formed on the first flexible wiring board 39 and the connection terminal 7 formed on the common wiring board 71
7 are electrically connected by an anisotropic conductive film 75. Thus, the fourth connection terminal 56 of the first flexible wiring board 39
The connection with the connection terminals 77 of the common wiring board 71 is performed outside the liquid crystal panel 70, and even if a pressure is applied to the vicinity of the connection portion at the time of the connection, the pressure does not affect the liquid crystal panel 70. Therefore, the connection can be easily made by the anisotropic conductive film 75. Further, since the connection can be made using a wide place outside the liquid crystal panel 70, the workability is excellent.

Next, the other end portion 47 of the first flexible wiring board 39
And one piece 72 of the common wiring board 71 is
10, that is, as shown in FIG. 10, the first flexible wiring board 39 is placed on one side so that the other end 47 and the other piece 73 are located in front of the liquid crystal panel 70 in FIG. 10. The glass substrate 31 is bent at about 180 ° in the vicinity of one side edge 31a. By bending the first flexible wiring board 39 in this manner, the other piece 73 of the common wiring board 71 is positioned behind the other end 62 of the second flexible wiring board 48, that is, as shown in FIG. And the other piece 73 is positioned on the near side of the other end 62. In this state, the second flexible wiring board 4
8 and the connection terminal 77 formed on the common wiring board are connected to the anisotropic conductive film 4.
5 for electrical connection. As described above, the connection between the sixth connection terminal 61 of the second flexible wiring board 48 and the connection terminal 77 of the common wiring board 71 is performed by connecting the fourth connection terminal 56 of the first flexible wiring board 39 to the common connection board 56. Similar to the connection of the connection terminal 77 with the connection terminal 77, the connection is performed outside the liquid crystal panel 70, whereby the liquid crystal panel 70 is electrically connected to the liquid crystal panel 70 by applying pressure without damaging the liquid crystal panel 70. Can be connected.

Thereafter, the other end portion 62 of the second flexible wiring board 48 and the other piece 73 of the common wiring board 71 are positioned so that the liquid crystal panel 70 is located behind, that is, as shown in FIG. The flexible wiring board 48 is bent by approximately 180 ° in the vicinity of one side edge 31a, 32a of the other glass substrate 31, and the common wiring board 71 is bent along the first arrangement direction A at the connection portion 74 thereof. Thus, the TCPs 41 and 51 and the common wiring board 71 can be arranged behind the liquid crystal panel 70, and the liquid crystal panel 7
0 can be mounted compactly. In addition, recently, due to environmental problems and the like, there has been a movement to adopt a mounting method that does not use solder.
Outside the first and second flexible wiring boards 39,
48 and the common wiring board 71 can be electrically connected to each other, so that connection using the anisotropic conductive film 45 requiring a large pressure at the time of connection is possible, and the present invention has been applied to the above-mentioned environmental problems. The liquid crystal panel 70 can be mounted by means that does not lead to environmental destruction.

FIG. 11 is a rear view showing a mounting structure of a liquid crystal panel 30 according to another embodiment of the present invention as viewed from the rear side, and FIG. 12 is viewed from a cutting plane line XII-XII in FIG. It is sectional drawing. LCD panel 30 and TCP 41,
51 has the same configuration as that of the embodiment of the present invention shown in FIGS. 1 to 6, and the description will be omitted to avoid duplication. Behind the liquid crystal panel 30, there is flexibility, and the first arrangement direction A
A first rear connection wiring substrate 80 extending in the direction of the arrow is arranged near one side edge 31 a of one glass substrate 31. The first back connection wiring board 80 is made of the same synthetic resin as the first and second flexible wiring boards 39 and 48, and has one end 81 in the first arrangement direction A, which is one end in the longitudinal direction, vertically. That is, in FIG. 11, it is folded and bent along the first arrangement direction A so as to overlap toward the end in a direction perpendicular to the paper of FIG. The first back connection wiring board is a single-sided wiring,
The wiring 82 is formed on the back side, that is, on the near side in FIG. The other end 47 of the first flexible wiring board 39 is arranged on the back side of the first back connection wiring board 80, that is, on the front side of the first back connection wiring board 80 in FIG.
The fourth connection terminal 56 formed at the other end 47 and the eighth connection terminal 83 formed continuously with the wiring 82 of the first back connection wiring board 80 are electrically connected by the anisotropic conductive film 45. Have been. Further, the other end portion 80a of the first back connection wiring board 80 is also used as a connector to be connected to a main body board (not shown), so that a separate connector is not used, and the number of connection steps is reduced, Connection costs can be reduced. Here, the connection cost in the present invention includes, for example, a material cost of a solder anisotropic conductive film used at the time of connection, a labor cost, a cost for operating a device used for connection, and the like.

Behind the liquid crystal panel 30, a substantially rectangular second rear connection wiring substrate 86 extending in the second arrangement direction B is provided on one edge 32 of the other glass substrate 32.
a. This second back connection wiring board 86 is a double-sided wiring board made of the same material as the common wiring board 52 of the embodiment shown in FIGS. 1 to 6 and having the wiring 87 formed on both sides in the thickness direction. On the back side of the second back connection wiring board 86, that is, in FIG.
The other end 62 of the second flexible wiring board 48 is arranged on the front side of the rear connection wiring board 86, and the sixth connection terminal 61 formed on the other end 62 and the second rear connection wiring board 86.
The ninth connection terminal 88 connected to the wiring 87 is electrically connected by the anisotropic conductive film 45. At an end of the second back connection wiring board 86 that is closer to the first back connection wiring board 80, a connection portion 90 protruding toward the first back connection wiring board 80 is formed. The connecting portion 90 is located at one end 81 of the first back connection wiring board 80 which is closer to the second back connection wiring board 86, behind the connection portion 90, that is, on the near side in FIG. 11. It is arranged so that it may overlap. The tenth connection terminal 91 formed on one end 81 of the first back connection wiring board 80 and the eleventh connection terminal 91 formed on the connection part 90 of the second back connection wiring board 80.
The connection terminals 92 are electrically connected by the anisotropic conductive film 45.

In this manner, the first and second flexible wiring boards 39 and 48 are electrically connected to the first and second back connection wiring boards 80 and 86, respectively, and the first and second back connection are provided. The wiring boards 80 and 86 are connected so as to be positioned with respect to each other, and the liquid crystal panel 30 is driven in response to a signal supplied from the main body board, and characters, numerals, or patterns to be displayed are displayed. By configuring the first and second flexible wiring boards 39 and 48 and the first and second back connection wiring boards 80 and 86 as described above,
The other end portions 47, 62 of the first and second flexible wiring boards 39, 48 and the first and second back connection wiring boards 80, 86 are arranged behind the liquid crystal panel 30, and the liquid crystal panel 30 Can be mounted in a small size. Further, since the first back connection wiring board 80 is configured as a single-sided wiring, a common wiring board of a double-sided wiring formed substantially in an L shape in the embodiment of the invention shown in FIGS. 7 to 10 is used. There is no need, and material costs are reduced, and manufacturing costs can be reduced. In general, a wiring board is composed of a plurality of wiring boards 2 on a large rectangular mother board 200 as shown in FIG.
01 is arranged, wired, cut out and manufactured. Therefore, when manufacturing the L-shaped wiring board 201, FIG.
In FIG. 3, there are many wasteful portions 202 indicated by oblique lines, and the number of wiring boards 201 that can be cut from one mother board 201 is reduced, resulting in high cost. In this embodiment of the present invention, it is not necessary to use such an L-shaped wiring board, so that there is no waste of material and the manufacturing cost can be reduced.

Next, a method of mounting the liquid crystal panel 30 shown in FIGS. 11 and 12 will be described. FIG.
As shown in FIG. 4, first, TCPs 41 and 51 are connected to the liquid crystal panel 30 as in the embodiment of the present invention shown in FIGS. Next, a first back connection wiring board 80 is provided behind the other end 47 of the first flexible wiring board 39, that is, in FIG.
4, is disposed on the depth side, and is disposed so as to face the other end 47 of the first flexible wiring board. In this state, the fourth connection terminal 56 of the first flexible wiring board 39 and the eighth connection terminal 83 of the first back connection wiring board 80 are aligned, and electrically connected by the anisotropic conductive film 45. Connecting. In addition, a second back connection wiring board 86 is disposed behind the other end 62 of the second flexible wiring board 48, that is, in front of the other end 62 in FIG. The sixth connection terminal 61 of the substrate 48 and the eighth connection terminal 88 of the second back connection wiring board 86 are aligned and electrically connected by the anisotropic conductive film 45. The connection between the first and second flexible wiring boards 38, 48 and the first and second rear connection wiring boards 80, 86 can be performed outside the liquid crystal panel 30, and the liquid crystal panel 30 is damaged. , And can be connected well. In addition, since connection can be made in a wide space, workability is excellent.

Next, the other end 4 of the first flexible wiring board 39
7 and the first back connection wiring board 80 are connected to the display panel 30.
15, that is, as shown in FIG. 15, so that the other end portion 47 and the first back connection wiring board 80 are located on the near side of the liquid crystal panel 30. , One side edge 31a of one glass substrate 31
Bend about 180 ° around. Here, the one end portion 81, which is a portion of the first back connection wiring board 80 near the second back connection wiring board 86 in the first arrangement direction A, is in the second arrangement direction of the second back connection wiring board 86. B at the connection portion 90 near the first back connection wiring board 80,
The one end of the first back connection wiring board 80 is placed on the back side of the one end 81, that is, on the near side in FIG. 15 so as to face the wiring 87 formed on the back connection wiring board. To be positioned.

In this state, one end 81 of the first back connection wiring board 80 and the second back connection wiring board 86
Is electrically connected to the connection section 90 of the first section. That is, the tenth connection terminal 91 of the first back connection wiring board 80 and the twelfth connection terminal 92 of the second back connection wiring board 86 are electrically connected by the anisotropic conductive film 45. The electrical connection between the first and second rear connection wiring boards 80 and 86 is performed outside the liquid crystal panel 30, whereby the liquid crystal panel 30 can be easily connected without being damaged.
Next, the other end portion 62 of the second flexible wiring board 48 and the second back connection wiring board 86 are positioned behind the liquid crystal panel 30, that is, in front of the liquid crystal panel 30 as shown in FIG. (2) In the vicinity of one end 81 of the flexible wiring board 48 and the first back connection wiring board 80, the other glass substrate 32 is bent by approximately 180 ° near one side edge 32 a. Thereby, the first and second flexible wiring boards 39 and 48 and the first and second back connection wiring boards 8 are formed.
0, 86, and the first and second rear connection wiring boards 80, 86 are electrically connected to each other, and the first and second flexible wiring boards 39, 48 are connected to each other. The other end portions 47 and 62 and the first and second rear connection wiring boards 80 and 86 are arranged behind the liquid crystal panel 30, so that the liquid crystal panel 30 can be mounted in a small size. Moreover,
As in the embodiment of the present invention shown in FIGS. 7 to 10, mounting can be performed without using solder.

FIG. 16 is a rear view showing a mounting structure of a liquid crystal panel 30 according to still another embodiment of the present invention as viewed from the rear side, and FIG. 17 is a sectional view taken along line XVII-XV of FIG.
It is sectional drawing seen from II. The liquid crystal panel 30 and the TCPs 41 and 51 have substantially the same configuration as those of the embodiment of the present invention shown in FIGS. Behind the display panel 30, a rigid first rear connection wiring substrate 100 extending in the first arrangement direction A is disposed near one side edge 31 a of one glass substrate 31. The first back connection wiring board 100 is made of the same material as the common wiring board 52 of the embodiment shown in FIGS. 1 to 6 and is a double-sided wiring in which the wiring 101 is formed on both sides in the thickness direction. The other end portion 47 of the first flexible wiring board 39 is arranged on the back side of the first back connection wiring board 100, that is, on the near side in FIG. The fourth connection terminal 56 formed at the other end 47 and the twelfth connection terminal 102 connected to the wiring of the first back connection wiring board 100 are electrically connected by the anisotropic conductive film 45.

The second rear connection wiring board 104, which is rigid and extends in the second arrangement direction B, is rigidly provided behind the display panel 30.
It is arranged near 2a. The second back connection wiring board 1
Reference numeral 04 denotes a double-sided wiring made of the same material as the common wiring board 52 of the embodiment shown in FIGS. 1 to 6 and having wirings 105 formed on both sides in the thickness direction. The other end 62 of the second flexible wiring board 48 is arranged on the rear side of the second rear connection wiring board 104, that is, on the near side in FIG. Sixth connection terminal 61
And the first connected to the wiring 105 of the second flexible wiring board 104.
The three connection terminals 106 are electrically connected by the anisotropic conductive film 45. A connector 108 connected to the main board is electrically connected to the second rear connection wiring board 104 on the rear side, that is, on the front side in FIG.

Further, behind the liquid crystal panel 30, it is flexible and folded back along the second arrangement direction B, and substantially
The third back connection wiring board 109 bent in the shape of a letter
And the second back connection wiring boards 100 and 104 are arranged in the vicinity where they abut each other. The third back connection wiring board 109 is made of the same synthetic resin as the first and second flexible wiring boards 39 and 48, is a single-sided wiring, and has a wiring 110 formed on an inner surface. One end 111 of the third back connection wiring board 109 is connected to the second back connection wiring board 10 of the first back connection wiring board 100.
The wiring 110 is arranged on the rear side of the end 112 closer to the fourth side, that is, on the near side in FIG.
The fourteenth connection terminal 113 connected to 0 and the fifteenth connection terminal 114 formed on the first back connection wiring board 100 are electrically connected by the anisotropic conductive film 45.

The other end 1 of the third back connection wiring board 109
16 is disposed between the liquid crystal panel 30 and an end 117 of the second back connection wiring board 104 near the first back connection wiring board 100, that is, the end 117 in FIG.
A sixteenth connection terminal 118 arranged on the front side of the other end 116 of the back connection wiring board 109 and connected to the wiring 110 and a seventeenth connection terminal 119 formed on the second back connection wiring board 104 are formed. They are electrically connected by the anisotropic conductive film 45. As a result, the other end portions 43 and 62 of the first and second flexible wiring boards 39 and 48 and the first to fourth flexible wiring boards 39 and 48 are formed.
The third back connection wiring boards 100, 104, and 109 are arranged behind the liquid crystal panel 30, so that the liquid crystal panel 30 can be mounted in a small size. Further, two rigid rear connection wiring boards 100 and 104 are electrically connected by a third rear connection wiring board 109 having single-sided wiring flexibility. Therefore, the material cost can be reduced as compared with the embodiment of the present invention shown in FIGS.

As a general guide, the cost of a flexible wiring board is about twice the cost of a rigid board, and the cost is reduced by making the flexible wiring board as small as possible. be able to. Therefore, the flexible third back connection wiring board 109 according to this embodiment of the present invention is different from the flexible first back connection wiring board 80 shown in FIGS. 11 to 15. The cost can be reduced even if the material cost of the extremely small and rigid first back connection wiring board 100 is taken into account.

Next, a method of mounting such a liquid crystal panel 30 will be described. First, as shown in FIG.
The TCPs 41 and 51 are electrically connected to the liquid crystal panel 30 as in the embodiment of the present invention shown in FIG. Next, the first back connection wiring board 100 is disposed behind the other end 47 of the first flexible wiring board 39. That is, as shown in FIG. 18, the first flexible wiring board 39 has the first
The rear connection wiring board 100 is arranged, and the fourth connection terminal 56 of the first flexible wiring board 39 and the first rear connection wiring board 1 are arranged.
It is aligned with the twelfth connection terminal 102 of FIG. Also, the second back connection wiring board 104 is arranged behind the other end 62 of the second flexible wiring board 48. That is, as shown in FIG. 18, the second back connection wiring board 104 is arranged on the front side of the other end 62 of the second flexible wiring board 48, and the sixth connection terminal of the second flexible wiring board 48 is provided. 61 and the second wiring board 10 for the rear connection
The fourth thirteenth connection terminal 106 is aligned and electrically connected by the anisotropic conductive film 45.

The first of the second back connection wiring boards 104
The third back connection wiring board 109 is provided at the end 117 near the back connection wiring board 100 so as to be on the rear side of the second back connection wiring board 104, that is, on the near side in FIG.
And the third back connection wiring board 1 is arranged such that one end 111 of the third back connection wiring board 109 extends toward the first back connection wiring board 100.
09 and the end 117 of the second back connection wiring board 104 near the first back connection wiring board 100 are connected between the sixteenth and seventeenth connection terminals 118 and 119 by the anisotropic conductive film 45. Connected and electrically connected. Further, the connector 108 is arranged so that the second back connection wiring board 104 is on the back side, that is, on the front side in FIG. 18, and is electrically connected by the anisotropic conductive film 45. Thus, the first and second flexible wiring boards 39, 48 and the first
The second back connection wiring boards 100 and 104 are connected outside the liquid crystal panel 30 so that the connection can be made without damaging the liquid crystal panel 30 and the work can be performed in a wide place. , Liquid crystal panel 30
Since there is no fear of damaging the work, the work is easy and the workability is good.

Next, the other end 6 of the second flexible wiring board 48
2 and the second back connection wiring board 104 are the liquid crystal panel 3
0, that is, on the near side of the liquid crystal panel 30 in FIG.
In the vicinity, it is bent about 180 °. In this manner, one end 111 of the third back connection wiring board 109 connected to the second back connection wiring board 104 is such that the first back connection wiring board 100 is located on the back side of the one end 111.
That is, they are arranged so as to be located on the near side in FIG. In such a state, the first back connection wiring board 100
The end 112 of the third back connection wiring board 109 and the end 112 near the second back connection wiring board 104 are
The thirteenth and fourteenth connection terminals 113 and 114 are connected by an anisotropic conductive film 45 and are electrically connected. First
Back connection wiring board 100 and third back connection wiring board 1
The connection to the LCD panel 09 is performed outside the liquid crystal panel 30, whereby the connection is performed without damaging the liquid crystal panel 30, and the connection operation is performed in a wide place, so that the workability is excellent.

Thereafter, the first flexible wiring board 3 is positioned such that the other end 47 of the first flexible wiring board 39 and the first back connection wiring board 100 are located behind the liquid crystal panel 30.
9 is bent by about 180 ° in the vicinity of one side edge 31a of one glass substrate 31, and the third back connection wiring board 109 is arranged in the second arrangement direction B in the same manner as the first flexible wiring board 39. To bend. As a result, the first and second flexible wiring boards 39, 48 and the first to third wiring boards for back connection 100, 104, 109 are arranged behind the liquid crystal panel 30, and the liquid crystal panel 30 is mounted in a small size. be able to. Moreover, each of the wiring boards 39, 48, 10
Each connection between 0, 104, and 109 is performed outside the liquid crystal panel 30, and the liquid crystal panel 30 is not affected by this connection, and the liquid crystal panel 30 is not damaged. Moreover, similar to the embodiment of the present invention shown in FIGS.
It can be mounted without using solder.

FIG. 20 is a rear view showing the mounting structure of a liquid crystal panel 30 according to still another embodiment of the present invention as viewed from the rear side. The mounting structure of the present embodiment is similar to the mounting structure of the embodiment shown in FIGS. The mounting structure of the present embodiment is substantially T-shaped in a developed state as shown in FIG. 21 instead of the third back connection wiring board 109 used in the embodiment shown in FIGS. A third rear connection wiring substrate 121 having flexibility to be formed is provided. The third back connection wiring board is provided along the second arrangement direction B, is bent along the second arrangement direction B, and has one end 122 electrically connected to the first back connection wiring board 100. And a main body 124 whose other end 123 is electrically connected to the second back connection wiring board 104. One rear portion has a connection portion 125 protruding in a direction away from the connection wiring board 100, that is, in FIG. By using such a third back connection wiring board 121, it is not necessary to separately provide a connector to be connected to the main board as in the embodiment of the present invention shown in FIGS. The number of steps can be reduced, and the connection cost can be reduced.

FIG. 22 is a rear view showing a mounting structure of a liquid crystal panel 70 according to still another embodiment of the present invention, as viewed from the rear side. FIG.
It is sectional drawing seen from XIII. Since the liquid crystal panel 70 and the TCPs 41 and 51 of the present embodiment have the same configuration as the embodiment of the present invention shown in FIGS. 7 to 10, the same reference numerals are given and the description is omitted. Also, the second back connection wiring board 104 has the same configuration as that of the embodiment of the invention shown in FIGS. 16 to 19, and therefore, is denoted by the same reference numerals and the description thereof is omitted. The first back connection wiring board 130 of the embodiment of the present invention has substantially the same configuration as the first back connection wiring board 100 of the embodiment of the present invention shown in FIGS. First Back Connection Wiring Board 130
Is the end 13 near the second back connection wiring board 104.
1 is provided to extend behind a portion where the second connection terminal 38 provided in the second arrangement direction B is formed. Other parts have the same configuration as the embodiment of the present invention shown in FIGS.

Behind the display panel 70, a third back connection wiring board 132 having flexibility is provided for the first and second connection boards.
It is arranged further behind the rear connection wiring boards 130 and 104, that is, on the near side in FIG.
The third back connection wiring board 132 includes the first and second wiring boards 132.
It is made of the same synthetic resin as the flexible wiring boards 39 and 48,
The wiring 133 is a single-sided wiring, and the wiring 133 is located on the depth side in FIG.
30 and 104. One end 134 of the third back connection wiring board 132 is connected to the 18th connection terminal 135 connected to the wiring 133 of the third back connection wiring board 132, and to the second back connection wiring board 104. The nineteenth connection terminal 136 connected to the wiring 105 of the wiring board 104 is connected by the anisotropic conductive film 45 and is electrically connected. Third Back Connection Wiring Board 132
Is provided so as to overlap with the end 131 of the first back connection wiring board 130, that is, the other end 138 is connected to the second connection terminal 3 of the other glass substrate 32.
8 are located behind the one side edge 32a where it is formed. In such a position, the twentieth connection terminal 139 connected to the wiring 133 of the third back connection wiring board 132 and the twenty-first connection terminal 140 connected to the wiring 101 of the first back connection wiring board 130 are connected. They are connected by the anisotropic conductive film 45 and are electrically connected.

With such a mounting structure, as will be described later, the other end portions 47 and 62 of the first and second flexible wiring boards are provided.
And first to third wiring boards for back connection 130, 104,
132 is arranged behind the liquid crystal panel 70, and each of the wiring boards 39, 48, 10 can be disposed without damaging the liquid crystal panel 70.
4, 130, 132 are electrically connected, and the liquid crystal panel 7
0, and the liquid crystal panel 70 can be mounted in a small size. In addition, the third back connection wiring board 132 that electrically connects the first and second back connection wiring boards 130 and 104 can be used without being bent, and its size is reduced as much as possible. be able to. Therefore, material costs can be reduced, and manufacturing costs can be reduced.

Next, the liquid crystal panel 70 having such a mounting structure will be described.
How to implement is described. As shown in FIG. 24, first, the liquid crystal panel 70 is connected to the TCPs 41 and 51 in the same manner as in the embodiment of the present invention shown in FIGS.
19, the first flexible wiring board 39 and the first rear connection wiring board 130 are electrically connected to each other, and the second flexible wiring board 48 and the second flexible wiring board 48 are connected to each other. The rear connection wiring board 104 is electrically connected. The second back connection wiring board 104 includes a third back connection wiring board 13.
2 is electrically connected in advance. The third back connection wiring board 132 is arranged on the near side in FIG. 24, and the second back connection wiring board 104 is connected to the third back connection wiring board 132.
And the eighteenth and nineteenth connection terminals 135 and 136 are electrically connected using the anisotropic conductive film 45. In this manner, as shown in FIG. 24, after the connection, as shown in FIG. 25, the other end 47 of the first flexible wiring board 39 and the first back connection wiring board 130 are placed behind the liquid crystal panel 70. To be located in the first
The flexible wiring board 39 is bent by about 180 ° in the vicinity of one side edge 31a of one glass substrate 31.

Next, the other end 6 of the second flexible wiring board 48
2 and the second back connection wiring board 104 are the liquid crystal panel 7
0, so that the second flexible wiring board 48 is
The other glass substrate 32 is bent by about 180 ° in the vicinity of one side edge portion 32a, and the first and second rear connection wiring boards 130, 10 are formed in the third rear connection wiring board 132.
4 and the other end 138 of the third back connection wiring board 132 is positioned behind one side edge 32 a of the other glass substrate 32. The connection terminals 139 and 140 are aligned and electrically connected by the anisotropic conductive film 45. Thereby, the first and second flexible wiring boards 39, 48
And first and second back connection wiring boards 130 and 104
Connection and the second back connection wiring board 1
The connection between the liquid crystal panel 04 and the third back connection wiring board 132 is made outside the liquid crystal panel 70, the connection is made without damaging the liquid crystal panel 70, the connection is made in a wide place, and the connection excellent in workability is made. Can be.

Further, the connection between the first back connection wiring board 130 and the third back connection wiring board 132 is made by connecting one side edge 32 a of the glass substrate 32 on which the second connection terminal 38 is formed.
Behind the scenes. At the time of the connection, even if a high pressure is applied to the connection portion, the connection is performed without affecting the display portion 70a of the liquid crystal panel 70 and without damaging the liquid crystal panel 70, and the liquid crystal panel 70 is mounted in a small size. Can be.

Further, the third back connection wiring board 132 used for connection between the first and second back connection wiring boards 130 and 104 can be used without being bent and can be connected at the shortest distance. The dimensions of the third back connection wiring board 132 can be made as small as possible, and the material cost and the manufacturing cost can be reduced as compared with the embodiment shown in FIGS. FIG.
Similarly to the embodiment of the present invention shown in FIGS. Because we can make mutual connection,
As described above, the connection can be made without using solder, for example, using an anisotropic conductive film, and there is no possibility of causing environmental destruction.

Here, the above-mentioned wiring boards 52, 86, 10
0, 104, and 130 are considered simply from the viewpoint of connection, and the connection portions of the TCPs 41 and 51 are connected to these wiring boards 5.
2, 86, 100, 104, and 130, and it is thought that it is not necessary to use double-sided wiring. The wires need to cross three-dimensionally in order to transmit, so that double-sided wires are required. However, the three-dimensional crossing portion of the wiring is concentrated on one of the first back connection wiring board 100; It can be a wiring.

In the above-described embodiment, a liquid crystal panel driven by a simple matrix has been described. However, as another embodiment of the present invention, for example, an active matrix including a thin film transistor (TFT) as a switching element. The same effect can be obtained by a liquid crystal panel driven, and the present invention can be suitably applied to such an active matrix driven liquid crystal panel which is very weak against high temperature and pressure.

In still another embodiment of the present invention, a display panel using EL (electroluminescent), plasma, or the like may be used, and the same effect can be obtained.

[0074]

[0075]

[0076]

[0077]

According to the present invention, the first and second flexible wiring boards are connected to the display panel, and the first flexible wiring board is electrically connected to the first flexible wiring board. And the second flexible wiring board is electrically connected to the second back wiring board. Next, the first flexible wiring board is bent, and the first back connection wiring board is arranged behind the display panel,
The portion of the first back connection wiring board near the second back connection wiring board and the portion of the second back connection wiring board near the first back connection wiring board are opposed to each other on the outside of the display panel to be electrically connected. After that, the second flexible wiring board is bent, and the other end of the second flexible wiring board and the second back connection wiring board are arranged behind the display panel. Thereby, the connection between the respective wiring boards can be performed outside the display panel, the connection can be performed without damaging the display panel, and the other end portions of the first and second flexible wiring boards and the first flexible wiring board can be connected. In addition, the second back connection wiring board is arranged behind the display panel, and the display panel can be mounted in a small size. Moreover, even if pressure is applied at the time of connection, the display panel is not damaged, so that connection can be made using, for example, an anisotropic conductive film. There is no risk of destruction. Furthermore, the first
And a second back connection wiring board, which is provided separately.
By using the configuration in which the wiring board for second back connection is connected to each other, it is not necessary to form a wiring board having a complicated shape, and the material cost can be reduced.

Further, according to the present invention, the display panel has the first
And the first and second flexible wiring boards are connected to the first and second flexible wiring boards, respectively, and the rigid first and second back connection wiring boards are respectively connected to the first and second flexible wiring boards. A third back connection wiring board having flexibility is connected to the end of the back connection wiring board. After that, the second flexible wiring board is bent, the other end of the second flexible wiring board and the second back connection wiring board are positioned behind the display panel, and the third back connection wiring board is moved to the first connection wiring board. The rear connection wiring board is electrically connected to an end near the second rear connection wiring board on the outside of the display panel. Thereafter, the first flexible wiring board is bent, and the other end of the first flexible wiring board and the first back connection wiring board are arranged behind the display panel. Thereby, the connection between the respective wiring boards can be connected outside the display panel, and the first and second wiring boards can be connected to each other without using the solder that deteriorates the environment and without damaging the display panel. By disposing the other end of the second flexible wiring board and the first and third wiring boards for connection behind the display panel behind the display panel, the display panel can be mounted in a small size. In addition, the size of the flexible wiring board can be reduced, and the material cost can be reduced.

Further, according to the present invention, the display panel has the first
The first and second flexible wiring boards are connected to the first and second flexible wiring boards, respectively, and the first and second rear connection wiring boards are connected to the first and second flexible wiring boards, respectively. A flexible third back connection wiring board is connected to an end of the second back connection wiring board closer to the first back connection wiring board, and the first flexible wiring board is bent to form a first flexible connection board. The other end of the flexible wiring board and the first back connection wiring board are arranged behind the display panel. After that, the second flexible wiring board is bent, and the other end of the second flexible wiring board and the second back connection wiring board are arranged behind the display panel. The third back connection wiring board is electrically connected to the first back connection wiring board so as to face the outside of the display unit of the display panel. Accordingly, the connection between the respective wiring boards can be performed outside the display section of the display panel, so that the connection can be performed without using the solder that deteriorates the environment, and the first and second flexible wiring boards can be connected. The other end and the first to third rear connection wiring boards are arranged behind the display panel, so that the display panel can be mounted in a small size.
In addition, since the first and second rear connection wiring boards can be connected in the shortest distance by using the flexible third rear connection wiring board without bending, the wiring board has flexibility. That is, the size of the third back connection wiring board can be reduced as much as possible.

[0080]

Further, according to the present invention, the first and second flexible wirings are provided on the display panel, the first and second flexible wirings being provided with a driving integrated circuit having flexibility and being curved so that the other end is located behind the display panel. The substrates are electrically connected respectively. Behind the display panel, one side and the other side are connected by a flexible connecting portion, and an L-shaped common wiring board is disposed, and one side of the common wiring board is provided with a first flexible board. The flexible wiring board is electrically connected to the other side, and the second flexible wiring board is electrically connected to the other piece. Thus, the other end portions of the first and second flexible wiring boards and the common wiring board are arranged behind the display panel, and each wiring board does not protrude outside the display panel. And a display device using this display panel can be manufactured in a small size. In addition, the common wiring board has a connection portion, and this connection portion can be used as a connector with the main body substrate, so that it is possible to eliminate the trouble of providing a separate connector and connecting, reducing the number of steps, and reducing the connection cost. Can be reduced.

Further, according to the present invention, the display panel has flexibility, and the first and second flexible wirings are provided with a driving integrated circuit curved so that the other end is located behind the display panel. The substrate is connected. Behind the display panel, a flexible first rear connection wiring board having a longitudinal shape is arranged so as to be connected to the first flexible wiring board. Also, behind the display panel, there is disposed a second rear connection wiring board which is connected to the rigid and long second flexible wiring board. One end of the second back connection wiring board is bent, and an end near the second back connection wiring board is opposed to one end and electrically connected. Thereby, the other end portions of the first and second flexible wiring substrates and the first and second rear connection wiring substrates are arranged behind the display panel,
Since each wiring board does not protrude significantly outward from the display panel, the display panel can be mounted in a small size, and the display device can be manufactured in a small size using this display panel. Further, in mounting in such a small size, only the first back connection wiring board can be a flexible board.

Further, according to the present invention, the display panel is flexible, and the first and second flexible circuits are provided with a drive integrated circuit that is curved so that the other end is located behind the display panel. Are connected to each other. Behind the display panel, rigid and longitudinal first and second wiring boards for rear connection are respectively arranged and electrically connected to the first and second flexible wiring boards, respectively. Further, a flexible third back connection wiring board is disposed behind the display panel, and the third back connection wiring board is bent substantially in a U-shape. The other end is opposed to and electrically connected to the first back connection wiring board, and the other end is opposed to and electrically connected to the second back connection wiring board. Thus, the other end portions of the first and second flexible wiring boards and the first to third wiring boards for connecting behind are arranged behind the display panel, and do not protrude greatly from the display panel. In addition, the display panel can be mounted in a small size, and the liquid crystal display device can be manufactured in a small size using the display panel. Moreover, by connecting the rigid first and second rear connection wiring boards with the third rear connection wiring board having flexibility, the size of the flexible wiring board can be reduced, and the material can be reduced. Cost can be reduced.

Further, according to the present invention, the third back connection wiring board has a connection portion projecting away from the first back connection wiring board. As a result, it is possible to make a connector to be connected to the main body board using this connection portion, and it is not necessary to provide a separate connector for connection, thereby reducing the number of times of connection and the number of connection points, and reducing the connection cost. it can.

Further, according to the present invention, the display panel includes:
First and second flexible wiring boards each having a driving integrated circuit that is flexible and that is curved so that the other end is located behind the display panel are connected. Behind the display panel, first and second longitudinally-connected wiring boards, which are rigid and elongated, are arranged and electrically connected to the first and second flexible wiring boards, respectively. A third back connection wiring board having flexibility is disposed behind the display panel, and one end thereof is opposed to an end of the first back connection wiring board near the second back connection wiring board. It is electrically connected, and the other end is opposed to a portion where the electrode portion of the display panel is formed on the first back connection wiring board, and is electrically connected behind the portion. Thereby, the other end portions of the first and second flexible wiring boards and the first to third wiring boards for connection behind are arranged behind the display panel, and each wiring board projects largely outward from the display panel. Accordingly, the display panel can be mounted in a small size, and the display device can be manufactured in a small size using the display panel. Moreover, by connecting the rigid first and second rear connection wiring boards with the third rear connection wiring board having flexibility, the size of the flexible wiring board can be reduced, and the material can be reduced. Cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a rear view showing a mounting structure of a liquid crystal panel 30 for describing an embodiment of the present invention, as viewed from a rear side.

FIG. 2 is a cross-sectional view taken along the line II-II in FIG.

FIG. 3 is a cross-sectional view taken along line III-III in FIG.

FIG. 4 is a rear view for explaining a procedure in which the mounting structure shown in FIG. 1 is developed and mounted on the structure.

FIG. 5 is a rear view showing a state where the second flexible wiring board 48 is bent from the state shown in FIG. 3;

FIG. 6 shows a state in which a heat insulating material 60 is interposed between the liquid crystal panel 30 and the common wiring board 52, taken along the line II-I of FIG.
It is sectional drawing seen from I.

FIG. 7 is a rear view showing the mounting structure of the liquid crystal panel 70 according to the embodiment of the present invention as viewed from the rear side.

FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 7;

9 is an exploded rear view of the mounting structure of FIG. 7;

FIG. 10 is a rear view showing a state where the first flexible wiring board 39 is bent from the state of FIG. 9;

FIG. 11 is a rear view showing a mounting structure of a liquid crystal panel 30 according to another embodiment of the present invention as viewed from the rear side.

FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 11;

FIG. 13 is a diagram for explaining the procedure for manufacturing the wiring board.

14 is an exploded rear view showing the mounting structure shown in FIG. 11;

FIG. 15 is a rear view showing a state where the first flexible wiring board 39 is bent from the state of FIG. 14;

FIG. 16 is a rear view showing a mounting structure of a liquid crystal panel 30 according to still another embodiment of the present invention as viewed from the rear side.

FIG. 17 is a cross-sectional view taken along line XVII-XVII of FIG. 16;

FIG. 18 is an exploded rear view showing the mounting structure shown in FIG. 16;

FIG. 19 is a rear view showing a state where the second flexible wiring board 48 is bent from FIG. 18;

FIG. 20 is a rear view showing a mounting structure of a liquid crystal panel 30 according to still another embodiment of the present invention as viewed from the rear side.

FIG. 21 is a front view showing a third rear connection wiring board 121;

FIG. 22 is a rear view showing a mounting structure of a liquid crystal panel 30 according to still another embodiment of the present invention as viewed from behind.

FIG. 23 is a sectional view taken along line XXIII-XXIII of FIG. 22;

24 is an exploded rear view of the mounting structure of FIG. 22;

FIG. 25 is a rear view showing a state where the first flexible wiring board 39 is bent from the state of FIG. 24;

FIG. 26 is a perspective view showing a mounting structure of a typical prior art liquid crystal panel 1.

FIG. 27 is a cross-sectional view taken along line XXVII-XXVII of FIG. 26;

FIG. 28 is a plan view showing a mounting structure of another conventional liquid crystal panel 1. FIG.

FIG. 29 is a rear view of the liquid crystal panel 1.

FIG. 30 is a plan view showing a liquid crystal display device 22 configured using the liquid crystal panel 1.

[Explanation of symbols]

 30, 70 Liquid crystal panel 31, 32 Glass substrate 34 Liquid crystal 36 First connection terminal 38 Second connection terminal 41, 51 Tape carrier package 48 Second flexible wiring board 52, 71 Common wiring board 53, 72 One piece 54, 73 The other piece 55,74 Connecting part 80,100,130 First back connection wiring board 86,104 Second back connection wiring board 109,132 Third back connection wiring board

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G02F 1/1345

Claims (8)

(57) [Claims] 1. The display device according to claim 1, wherein the first and second connection terminals disposed in the first and second arrangement directions intersecting each other are formed on a peripheral portion of the display panel.
One ends of first and second flexible wiring boards on which a driving integrated circuit for driving the display panel is mounted are electrically connected to each other, and a first arrangement is provided on the other end of the first flexible wiring board. A first back connection wiring board having flexibility extending along the first direction is electrically connected to the other end of the second flexible wiring board, and a second back connection wiring extending along the second arrangement direction is provided. Electrically connecting the wiring boards, bending the first flexible wiring board so that the other end of the first flexible wiring board and the first back connection wiring board are located behind the display panel; A portion of the one back connection wiring board closer to the second back connection wiring board in the first arrangement direction, and a portion of the second back connection wiring board closer to the first back connection wiring board in the second arrangement direction;
The second flexible wiring board is opposed to and electrically connected to the outside of the display panel, and the other end of the second flexible wiring board and the second back connection wiring board are located behind the display panel. A display panel mounting method, wherein the display panel is bent. 2. The first and second connection terminals of the display panel, wherein the first and second connection terminals arranged in the first and second arrangement directions intersecting each other are formed on a peripheral portion of the display panel.
One ends of first and second flexible wiring boards on which a driving integrated circuit for driving the display panel is mounted are electrically connected to each other, and a first arrangement is provided on the other end of the first flexible wiring board. A rigid second back connection wiring board extending along the second array direction is electrically connected to the rigid first back connection wiring board extending along the direction, and is connected to the other end of the second flexible wiring board along the second arrangement direction. The second back connection wiring board has flexibility extending toward the first back connection wiring board at an end near the first back connection wiring board in the second arrangement direction of the second back connection wiring board. One end of the third back connection wiring board is electrically connected to the second flexible wiring board so that the other end of the second flexible wiring board and the second back connection wiring board are located behind the display panel. The other end of the third back connection wiring board is connected to the first back connection wiring base. And electrically connected to the end near the second rear connection wiring board in the first arrangement direction on the outside of the display panel, and the other end of the first flexible wiring board and the first rear connection A method for mounting a display panel, comprising: bending a first flexible wiring board so that a wiring board is located behind a display panel; and bending a third wiring board for connection behind the display panel. 3. The first and second connection terminals of the display panel, wherein the first and second connection terminals arranged in the first and second arrangement directions intersecting each other are formed on a peripheral edge portion.
One ends of first and second flexible wiring boards on which a driving integrated circuit for driving the display panel is mounted are electrically connected to each other, and a first arrangement is provided on the other end of the first flexible wiring board. A rigid second back connection wiring board extending along the second array direction is electrically connected to the rigid first back connection wiring board extending along the direction, and is connected to the other end of the second flexible wiring board along the second arrangement direction. And a third rear connection having flexibility extending toward the first rear connection wiring board at an end of the second rear connection wiring board near the first rear connection wiring board in the second arrangement direction. The first flexible wiring board is electrically connected to one end of the first wiring board, and the other end of the first flexible wiring board and the first back connection wiring board are positioned behind the display panel. The other end of the second flexible wiring board and the second back connection wiring board are The second flexible wiring board is bent so as to be located behind, and the other end of the third back connection wiring board is connected to the first back connection wiring board so as to face the outside of the display unit of the display panel. A display panel mounting method. 4. A display panel in which first and second connection terminals arranged in mutually intersecting first and second arrangement directions are formed on a peripheral portion, and one end of the first connection terminal is electrically connected. A first flexible wiring board that is connected and has flexibility and is bent so that the other end is located behind the display panel; and one end is electrically connected to the second connection terminal, and Flexible wiring board having a characteristic and curved so that the other end is located behind the display panel; and a drive integration mounted on the first and second flexible wiring boards and driving the display panel Circuit and the display panel, and the overall shape is substantially L
A connection extending in the first arrangement direction and the other end extending in the second arrangement direction are connected by a flexible connecting portion and are connected to the main body substrate. The connecting portion is bent with a vertically overlapping portion, one end of which is electrically connected to the other end of the first flexible wiring substrate, and the other end of the second flexible wiring substrate A mounting structure of a display panel, wherein the portion includes a common wiring board electrically connected to the other side. 5. A display panel in which first and second connection terminals arranged in first and second arrangement directions crossing each other are formed on a peripheral portion, and one end is electrically connected to the first connection terminal. A first flexible wiring board having flexibility and bending so that the other end is located behind the display panel; and one end electrically connected to the second connection terminal. A second flexible wiring board which is curved so that the other end is located behind the display panel, and a drive integrated circuit mounted on the first and second flexible wiring boards to drive the display panel And is disposed behind the display panel, is flexible, has a longitudinal shape extending in the first arrangement direction, and is folded back along the first arrangement direction so that one end in the first arrangement direction is vertically overlapped. The first back connection wiring board to which the first flexible wiring board is bent and electrically connected to the other end of the first flexible wiring board A rear end portion of the first rear connection wiring board, which is rigid, has a longitudinal shape extending in the second arrangement direction, and which is closer to the first rear connection wiring board in the second arrangement direction. And a second wiring board for rear connection to which the other end of the second flexible wiring board is electrically connected opposite to the bent one end. Panel mounting structure. 6. A display panel in which first and second connection terminals arranged in mutually intersecting first and second arrangement directions are formed on a peripheral portion, and one end is electrically connected to the first connection terminal. A first flexible wiring board having flexibility and bending so that the other end is located behind the display panel; and one end electrically connected to the second connection terminal. A second flexible wiring board which is curved so that the other end is located behind the display panel, and a drive integrated circuit mounted on the first and second flexible wiring boards to drive the display panel A first rear connection wiring board, which is disposed behind the display panel, is rigid, has a longitudinal shape extending in the first arrangement direction, and is electrically connected to the other end of the first flexible wiring board. And a longitudinal shape that is disposed behind the display panel, is rigid, and extends in the second arrangement direction. A second back connection wiring board to which the other end of the flexible wiring board is electrically connected; a second back connection wiring board disposed behind the display panel, having flexibility and being folded back in the second arrangement direction; It is bent substantially in a U-shape, and one end is opposed to an end of the first back connection wiring board near the second back connection wiring board, is electrically connected, and the other end is the second back connection wiring board. A display panel mounting structure, comprising: a third back connection wiring board which is electrically connected to an end of the back connection wiring board near the first back connection wiring board. 7. The display according to claim 6, wherein the third back connection wiring board has a connection portion protruding in a direction away from the first back connection wiring board in the first arrangement direction. Panel mounting structure. 8. A display panel in which first and second connection terminals arranged in mutually intersecting first and second arrangement directions are formed on a peripheral portion, and one end is electrically connected to the first connection terminal. A first flexible wiring board having flexibility and being curved so that the other end is located behind the display panel, one end of which is electrically connected to the second connection terminal; A second flexible wiring board which is curved so that the other end is located behind the display panel, and a drive integrated circuit mounted on the first and second flexible wiring boards to drive the display panel A first rear connection wiring board, which is disposed behind the display panel, is rigid, has a longitudinal shape extending in the first arrangement direction, and is electrically connected to the other end of the first flexible wiring board. And a longitudinal shape that is disposed behind the display panel, is rigid, and extends in the second arrangement direction. A second back connection wiring board to which the other end of the flexible wiring board is electrically connected; a second back connection wiring board which is disposed behind the display panel and has flexibility, and one end of which is flexible And is electrically connected to an end near the first rear connection wiring board, and is electrically connected to the first rear connection wiring board outside the display section of the display panel at the other end. And a third back connection wiring board.