KR20120038167A - Liquid crystal display module and liquid crystal display device having the same - Google Patents

Abstract

PURPOSE: A liquid crystal display module and a liquid crystal display device with the same are provided to realize a bezel part whose width is narrow. CONSTITUTION: A metal PCB(Printed Circuit Board)(33) comprises a first substrate, a second substrate, and a connector through hole of metal materials. The connector through hole is opened at a location corresponding to a connector connecting hole. A connector module(80) comprises a connector and a module board. The connector is mounted on the module board. The module board is electrically connected to the connector.

Description

Liquid crystal display module and liquid crystal display device having the same {LIQUID CRYSTAL DISPLAY MODULE AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

The present invention relates to a liquid crystal display module having a structure for fastening a connector to a metal PCB on which a light emitting diode is mounted, and a liquid crystal display device having the same.

Liquid crystal displays (LCDs) display images by using electrical and optical characteristics of liquid crystals. Liquid crystal displays (LCDs) are thinner and lighter than other display devices, and have a low power consumption and low driving voltage.

The liquid crystal display device includes a liquid crystal display panel that encapsulates a liquid crystal between two transparent substrates and applies a voltage to change the direction of liquid crystal molecules to change light transmittance to optically display an image. A liquid crystal display module is provided.

Recently, an edge type liquid crystal display module using a light emitting diode as a light source is mainly used to make the liquid crystal display device slim.

An edge type liquid crystal display module includes a printed circuit board on which a plurality of light emitting diodes are mounted on a side of the liquid crystal display module, and light generated from the light emitting diodes is drawn to the front through a light guide plate and supplied to the liquid crystal display panel.

In addition, the printed circuit board uses a metal PCB to effectively dissipate heat generated from a plurality of light emitting diodes.

One aspect of the present invention provides a liquid crystal display module and a liquid crystal display device having the same can implement a narrow bezel.

In addition, another aspect of the present invention provides a liquid crystal display module having a connection structure of a connector suitable for implementing a narrow bezel portion and a liquid crystal display device having the same.

To this end, a liquid crystal display module according to an embodiment of the present invention includes a bottom chassis having a side surface, a bottom surface having an open connector connection hole, and a first substrate of a metal material and a plurality of light emitting diodes supported on the bottom surface. A metal PCB having a second substrate mounted thereon, a connector through-hole opened at a position corresponding to the connector connection hole, a connector, and a module substrate on which the connector is mounted and electrically connected to the connector. And a connector module, wherein the module substrate is mounted on a second substrate of the metal PCB to be electrically connected to the second substrate, and the connector passes through the connector through hole and the connector connection hole from the lower surface. It is characterized by protruding.

In addition, the connector may be mounted to the metal PCB through the module substrate so as not to protrude to the upper portion of the second substrate.

In addition, the module substrate and the metal PCB may be disposed to overlap.

In addition, one surface of the module substrate on which the connector is mounted may be provided with terminal portions electrically connected to the connection terminals of the connector, and land portions corresponding to the terminal portions may be provided on the second substrate.

In addition, the terminal portions and the land portions may be electrically connected by soldering.

In addition, the module substrate may be configured of a flexible printed circuit board (FPCB).

The light emitting units of the plurality of light emitting diodes may be disposed perpendicular to the second substrate to emit light in a direction parallel to the second substrate.

In addition, a rear surface of the light emitting diode provided on the opposite side to the light emitting portion may be disposed adjacent to the side surface.

The light emitting device may further include a light guide part disposed on the second substrate, and the plurality of light emitting diodes may be disposed adjacent to the side surface of the light guide part to emit light.

The display device may further include a reflector provided under the light guide part, and the reflector may be disposed on an upper portion of the lower surface while covering a portion of the second substrate.

In addition, the connector includes a housing having one side open, a plurality of connection terminals arranged in the housing, and a plurality of lead parts extending outside the housing to correspond to the plurality of connection terminals and mounted on the module substrate. The module substrate may include a plurality of terminal portions electrically connected to the plurality of connection terminals, respectively, and bonded to land portions of the second substrate.

According to an exemplary embodiment of the present invention, a liquid crystal display includes: a light guide part; a plurality of light emitting diodes disposed to face at least one side of the light guide part; a first substrate, an insulating layer, and the plurality of thermally conductive metal materials; A second PCB on which the light emitting diodes are mounted is stacked and formed to overlap a portion of the lower part of the light guide part, and includes a metal PCB having an open connector through hole; and to supply power to the plurality of light emitting diodes. And a connector module having a module board mounted on an upper surface of the first board and a connector mounted on the module board so as to pass through the connector through hole.

The bottom chassis may further include a bottom chassis supporting the metal PCB, and the bottom chassis may include a connector connection hole corresponding to the connector through hole.

In addition, the connector may be installed so as not to protrude to the upper portion of the second substrate.

In addition, a terminal portion electrically connected to the connection terminals of the connector is formed on one surface of the module substrate on which the connector is mounted, and the second substrate is a land formed at a position adjacent to the connector through hole to correspond to the terminal portions. Wealth can be prepared.

In addition, the module substrate may be configured of a flexible printed circuit board (FPCB).

The light emitting units of the plurality of light emitting diodes may be vertically disposed at positions adjacent to one edge of the second substrate.

The display device may further include a reflector provided under the light guide part, and the reflector may be disposed on an upper portion of the lower surface while covering a portion of the second substrate.

In addition, the connector includes a housing having one side open, a plurality of connection terminals arranged in the housing, and a plurality of lead parts extending outside the housing to correspond to the plurality of connection terminals and mounted on the module substrate. The module substrate may include a plurality of terminal portions electrically connected to the plurality of connection terminals, respectively, and bonded to land portions of the second substrate.

In addition, the module substrate may be provided in the form of a thin thin plate.

A light source unit of a liquid crystal display according to an embodiment of the present invention is a metal PCB formed by laminating a first substrate of a heat-dissipating metal material, an insulating layer and a second substrate on which a plurality of light emitting diodes are mounted, and the plurality of light emitting diodes. A light source unit of a liquid crystal display device having a connector module for supplying power to the light source unit, wherein the connector module includes a connector having a plurality of connection terminals, and a plurality of connectors on which the connector is mounted and electrically connected to the plurality of connection terminals. And a module substrate having a terminal portion of the metal PCB, wherein the metal PCB is provided with a connector through hole for installing the connector therethrough, and the second substrate at a position adjacent to the connector through hole is bonded to the plurality of terminal portions. A plurality of land portions are provided.

In addition, the plurality of light emitting diodes may be spaced apart along the longitudinal direction of the metal PCB to emit light toward the width direction of the metal PCB.

In addition, the plurality of light emitting diodes may be disposed adjacent to a length end of the width direction.

As described above, the liquid crystal display module and the liquid crystal display device having the same according to the embodiment of the present invention can realize a narrow bezel and improve reliability.

1 is an exploded perspective view schematically illustrating a liquid crystal display according to an exemplary embodiment of the present invention.
2 is a cross-sectional view illustrating a combined state of a liquid crystal display according to an exemplary embodiment of the present invention.
3 is a cross-sectional view showing a metal PCB according to an embodiment of the present invention.
Figure 4 is an exploded perspective view showing a connector module according to an embodiment of the present invention.
5 shows a coupling relationship of the light source unit according to the embodiment of the present invention.
6 is a cross-sectional view showing a combined state of the bottom chassis and the light source unit according to an embodiment of the present invention.

Hereinafter, a preferred embodiment according to the technical spirit of the liquid crystal display device of the present invention as described above with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a schematic structure of a liquid crystal display according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a coupling structure of the liquid crystal display according to an exemplary embodiment of the present invention.

1 and 2, the liquid crystal display device includes a liquid crystal display panel 10, a liquid crystal display module 20 positioned behind the liquid crystal display panel 10, a liquid crystal display panel 10, and a liquid crystal display. The middle mold 70 supporting the display module 20 to be spaced apart from each other, the top chassis 60 and the bottom chassis 50 disposed on the upper and lower portions of the liquid crystal display panel 10 and the liquid crystal display module 20, respectively. It may be configured to include.

The top chassis 60 may include a bezel part 61 surrounding the edge of the liquid crystal display panel 10 and a side part 63 bent at an end of the bezel part 61.

The bezel part 61 refers to a width of an outer line of the liquid crystal display panel 10 and an active area where a screen is actually displayed.

The liquid crystal display panel 10 includes a thin film transistor substrate 11 on which a thin film transistor is formed, a color filter substrate 13 facing the thin film transistor substrate 11, a thin film transistor substrate 11 and a color filter substrate ( 13) a liquid crystal layer (not shown) provided between.

One side of the thin film transistor substrate 11 is provided with a driving unit 15 for applying a driving signal.

The driving unit 15 is a flexible printed circuit board (FPCB) 16, a driving chip 17 mounted on the flexible printed circuit board 16, and a circuit board 18 connected to the other side of the flexible printed circuit board 16. ).

The driver 15 represents a chip on film (COF) method, and other known methods such as a tape carrier package (TCP) and a chip on glass (COG) may be used. In addition, the driver 15 may be mounted on the thin film transistor substrate 11.

The liquid crystal display panel 10 adjusts the arrangement of the liquid crystal layer to form a screen, but since it is a non-light emitting device, light must be supplied from the liquid crystal display module 20 located on the rear surface.

The liquid crystal display module 20 emits light to the plurality of optical sheets 21 disposed under the liquid crystal display panel 10, the light guide portion 25 disposed under the optical sheet 21, and the light guide portion 25. It may be configured to include a light source unit 30 for supplying, and a reflecting portion 40 located on the lower surface of the light guide portion 25.

The optical sheet 21 includes a protective film 22, a prism film 23, and a diffusion film 24.

The diffusion film 24 has a bead-like coating layer formed on the base plate to diffuse the light from the light guide portion 25 and supply the light to the liquid crystal display panel 10.

The prism film 23 is formed with a triangular prism-shaped prism on the upper surface to collect light diffused from the diffusion film 24 in a direction perpendicular to the plane of the upper liquid crystal display panel 10. .

Two prism films 23 are usually used, and the micro prisms formed on each prism film 23 form a predetermined angle.

The light passing through the prism film 23 proceeds almost vertically to provide a uniform luminance distribution.

The protective film 22 is positioned above the prism film 23 to protect the prism film 23 sensitive to scratches such as dust.

The light guide portion 25 is made of acrylic resin such as polymethyl methacrylate (PMMA) or polymethyl styrene (polymethylstyrene, a copolymer of methyl methacrylate and styrene), and light from the light source unit 30. It serves to uniformly supply to the diffusion film (24).

The light guide portion 25 is provided on the side opposite to the entrance surface 26 provided on the side end surface so that the light emitted from the light source unit 30 is incident, the exit surface 27 and the exit surface 27 facing the diffusion film 24. It includes a reflection surface (not shown) provided.

The reflector 40 is positioned below the light guide 25 and serves to supply the light to the light guide 25 by reflecting light toward the bottom again.

The reflector 40 may be made of a plastic material such as polyethylene terephthalate (PET) or polycarbonate (PC).

The light source unit 30 includes a plurality of light emitting diodes 31 emitting light to at least one incident surface 26 of the light guide portion 25, and a plurality of light emitting diodes 31 mounted thereon, and a plurality of light emitting diodes 31. ) Is a printed circuit board 33 on which a conductive pattern for applying an electrical signal is formed.

The plurality of light emitting diodes 31 may include a plurality of light emitting diodes 31 emitting white light, or a combination of light emitting diodes 31 emitting red, green, and blue light.

The light emitting diodes 31 may be disposed perpendicularly to the surface of the printed circuit board 33 to irradiate light onto the incident surface 26 of the light guide portion 25.

That is, the light emitting portion 36 of the light emitting diode 31 that emits light is disposed perpendicular to the upper surface 34 of the printed circuit board 33 so as to be adjacent to the incident surface 26 of the light guide portion 25. May be placed in position.

The printed circuit board 33 may be made of a metal printed circuit board (PCB) made of a material having high thermal conductivity, such as a silicon steel sheet, a galvanized steel sheet, and an aluminum disc.

The printed circuit board 33 has a length L extending in the longitudinal direction so as to correspond to a transverse length of the light guide plate 25 and the incident surface 26 facing each other, and a width extending in the width direction perpendicular to the longitudinal direction ( W) may be formed in a rectangular shape having a predetermined thickness.

The plurality of light emitting diodes 31 mounted perpendicular to the printed circuit board 33 may be spaced apart in the longitudinal direction at adjacent positions of one edge of the printed circuit board 33 to irradiate light toward the width direction.

Portions of the printed circuit board 33 on which the plurality of light emitting diodes 31 are not mounted may be disposed to overlap the bottom surface of the reflector 40. In this case, the back surface 35 of the printed circuit board 33 is in close contact with the inner side 51a of the bottom surface 51 of the bottom chassis 50.

Accordingly, heat generated in the plurality of light emitting diodes 31 is rapidly transferred to the bottom chassis 50 through the printed circuit board 33 to be heat-exchanged with the outside air.

In addition, since the printed circuit board 33 is formed of a metal PCB, heat generated from the plurality of light emitting diodes 31 may be quickly transferred to the bottom chassis 50.

That is, as shown in FIG. 3, the metal PCB 33 includes a first heat dissipating metal substrate 33a provided on a bottom surface, a second substrate 33c on which a conductive circuit pattern is formed, and a first substrate 33a. ) And an insulating layer 33b for insulating between the second substrate 33c.

The first substrate 33a is formed of a material having high thermal conductivity such as silicon steel sheet, galvanized steel sheet, aluminum plate or alloy thereof to absorb heat generated from the light emitting diode 31. The second substrate 33b may be made of a copper material serving as a conductive wiring of the circuit unit. The insulating layer 33c may be formed of an insulating material having high heat dissipation to prevent electrical connection between the circuit pattern of the second substrate 33c and the first substrate 33a, which is a heat dissipation layer, and to increase heat dissipation effect.

A plurality of light emitting diodes 31 are bonded to the second substrate 33b using silver epoxy or a solder alloy, and electrodes of the plurality of light emitting diodes 31 are connected to a circuit pattern.

In the present embodiment, the metal PCB of the single layer structure in which the metal layer, the insulating layer, and the copper layer are sequentially stacked has been described. However, a multi-layer metal PCB in which the insulating layer and the copper layer are laminated on the upper surface of the metal layer may be used. Of course.

The bottom chassis 50 may include a lower surface 51 on which the liquid crystal display module 20 is mounted, and a side surface 52 extending upward from the circumference of the lower surface 51.

At least one circuit board for driving the liquid crystal display may be provided on the bottom of the bottom chassis 50. That is, when the liquid crystal display device according to the present invention is applied as a broadcast signal receiver (TV), it is driven by a power circuit board, a main circuit board on which various necessary signal processing connectors and signal processing ICs are mounted, and a plurality of light emitting diodes 31. The driving printed circuit board 59 to which power is applied may be screwed together. In addition, the driving unit 15 of the liquid crystal display panel may also be fixed to the disguise device on the bottom of the bottom chassis 50.

The metal PCB 33 may be provided with a connector module 80 for electrical connection with the driving printed circuit board 59. The connector module 80 penetrates through the connector connecting hole 57 formed in the bottom surface 51 of the bottom chassis 50, protrudes outward from the bottom surface 51, and is electrically connected to the driving printed circuit board 59. It is coupled to the connector 58 provided at the end of.

One of the connector module 80 and the connector 58 is a male connector, the other is a female connector, and the male and female connectors are coupled to each other.

In addition, the connector module 80 may be damaged by interference with the reflecting portion 40, the light guide portion 25, and the optical sheet 21 that are seated on the upper portion of the width W of the printed circuit board 33. It may be mounted on the metal PCB 33 to prevent.

Figure 4 is an exploded perspective view of the connector module according to an embodiment of the present invention, Figure 5 shows a coupling relationship between the connector module and the metal PCB according to an embodiment of the present invention.

4 and 5, the connector module 80 may include a connector 81 and a module substrate 85 on which the connector 81 is mounted.

The connector 81 may include a housing 82 formed of a resin material and having a slot 82a open at one side thereof, and a plurality of connection terminals 83 arranged inside the housing 82.

A plurality of lead pins 84 extending a predetermined length to the outside are provided on both sides of the lower end of the housing 82, and the plurality of lead pins 84 are connected to each of the plurality of connection terminals 83. .

The plurality of lead pins 84 are electrically connected to the plurality of lead portions 86 formed on the module substrate 85 by soldering.

The connector 81 transmits power or various signals transmitted from the driving printed circuit board 59 to the module substrate 85.

The connector 81 in this embodiment is configured as a female connector, but may be formed as a plug connector. In addition, although the plurality of connection terminals 83 are formed in a rod shape, this is merely an example, and various shapes of terminals may be used. Further, although the slot 82a of the connector 81 is formed to be opened in the vertical direction, it may be opened in the horizontal direction.

The module substrate 85 is a flexible printed circuit board (FPCB), a flexible PCB (ceramic PCB) having a substrate body 87, a plurality of wirings 88, and a plurality of terminal portions 89. It may be configured as any one of a rigid PCB (regid PCB).

The substrate main body 87 is made of a resin film, and may be provided in a thin plate shape. The substrate main body 87 is laminated and mounted on the upper surface of the second substrate 33c of the metal PCB 33.

Each of the plurality of wirings 88 is connected to a plurality of lead portions 86 corresponding to one end thereof, and the other ends thereof are connected to the plurality of terminal portions 89 formed on both sides of the substrate main body 87.

The plurality of terminal portions 89 may be made of a conductive metal, and may be bonded to the plurality of land portions 37 formed on the metal PCB 33 by a suitable method such as soldering or the like.

On the other hand, the metal PCB 33 may be provided with a connector through-hole 38 opened so that the connector 81 of the connector module 80 can pass through when the connector module 80 is mounted.

The connector through hole 38 has a shape corresponding to that of the housing 82 of the connector 81 so that when the connector module 80 is mounted on the metal PCB 33, the connector 81 opens the connector through hole 38. To penetrate through.

A plurality of land portions 37 may be provided around the connector through hole 38 to contact the plurality of terminal portions 89 formed on the module substrate 85.

The plurality of terminal portions 89 and the plurality of land portions 37 may be soldered and coupled through a surface mount technology (SMT) process.

Through this configuration, when the connector module 80 is fastened downward from the upper direction of the first substrate 33c of the metal PCB 33 on which the plurality of light emitting diodes 31 are mounted, as shown in FIG. 6. The connector 81 penetrates through the connector through hole 38 to protrude to the lower portion of the metal PCB 33, and the protruded portion of the connector 81 is connected to a connector formed on the bottom surface 51 of the bottom chassis 50. It penetrates the hole 57 and protrudes to the bottom of the bottom chassis 50.

The connector 81 protruding to the bottom of the bottom chassis 50 is coupled to the connector 58 connected to the driving printed circuit board 59.

On the other hand, the light source unit 30 of the present embodiment is a metal PCB 33 between the bottom portion 33 and the light guide portion 25 of the bottom chassis 50 to implement a narrow liquid crystal display device of the bezel portion 61 A portion of the ()) is to be overlapped, but since the connector 81 for applying power to the plurality of light emitting diodes 31 does not protrude to the upper surface of the metal PCB 33, the light guide portion 25 by the connector 81 Or damage to the reflector 40 can be prevented.

In the above, specific embodiments have been illustrated and described. However, the present invention is not limited to the above-described embodiments, and a person skilled in the art may make various changes without departing from the spirit of the technical idea of the invention described in the claims below.

10: liquid crystal display panel, 20: liquid crystal display module,
21: optical sheet, 25: light guide part,
30: light source unit, 31: light emitting diode,
33: metal PCB, 37: land portion,
38: connector through hole, 40: reflector,
50: bottom chassis, 57: connector hole,
80: connector module, 81: connector,
83: connection terminal, 84: lead pin,
85: module substrate, 86: lead portion,
89: terminal section.

Claims (23)

A bottom chassis having a side surface and a bottom surface having an open connector connection hole;
A metal PCB having a first substrate made of a metal supported on the lower surface, a second substrate on which a plurality of light emitting diodes are mounted, and a connector through hole opened at a position corresponding to the connector connection hole;
And a connector module having a connector and a module substrate on which the connector is mounted and electrically connected to the connector.
The module substrate may be mounted on a second substrate of the metal PCB to be electrically connected to the second substrate, and the connector may protrude from the lower surface through the connector through hole and the connector connection hole. Display module. The method of claim 1,
And the connector is mounted to the metal PCB through the module substrate so as not to protrude to the upper portion of the second substrate. The method of claim 1,
And the module substrate and the metal PCB overlap each other. The method of claim 1,
One side of the module substrate on which the connector is mounted is formed terminal portions electrically connected to the connection terminals of the connector,
And a land portion corresponding to the terminal portions is provided on the second substrate. The method of claim 4, wherein
And the terminal parts and the land parts are electrically connected by soldering. The method of claim 1,
The module substrate is a liquid crystal display module comprising a flexible printed circuit board (FPCB). The method according to any one of claims 1 to 6,
And a light emitting portion of the plurality of light emitting diodes disposed perpendicular to the second substrate to emit light in a direction parallel to the second substrate. The method of claim 7, wherein
And a rear surface of the light emitting diode provided on the opposite side to the light emitting portion is disposed adjacent to the side surface. The method according to any one of claims 1 to 6,
Further comprising a light guide portion disposed on the upper portion of the second substrate,
And the plurality of light emitting diodes are disposed adjacent to the light guide portion to emit light. The method of claim 9,
And a reflecting portion provided below the light guide portion, wherein the reflecting portion covers a portion of the second substrate and is disposed above the lower surface. The method of claim 1,
The connector includes a housing having one side open, a plurality of connection terminals arranged in the housing, and a plurality of lead parts extending outwardly of the housing to correspond to the plurality of connection terminals and mounted on the module substrate.
And the module substrate includes a plurality of terminal portions electrically connected to the plurality of connection terminals and bonded to land portions of the second substrate. A light guide;
A plurality of light emitting diodes disposed to face at least one side surface of the light guide portion;
A metal having a thermally conductive metal substrate, an insulating layer, and a second substrate on which the plurality of light emitting diodes are mounted are stacked and disposed to overlap a portion of the lower portion of the light guide portion, and having an open connector through hole. PCB; with,
And a connector module having a module substrate mounted on an upper surface of the first substrate to supply power to the plurality of light emitting diodes, and a connector mounted on the module substrate so as to pass through the connector through hole. A liquid crystal display device. The method of claim 12,
Further comprising a bottom chassis for supporting the metal PCB,
And the bottom chassis includes a connector connection hole corresponding to the connector through hole. The method of claim 12,
And the connector is installed so as not to protrude above the second substrate. The method of claim 12,
One side of the module substrate on which the connector is mounted is formed terminal portions electrically connected to the connection terminals of the connector,
And second land portions formed on the second substrate to be adjacent to the connector through-holes so as to correspond to the terminal portions. The method of claim 12,
And said module substrate comprises a flexible printed circuit board (FPCB). The method of claim 12,
And a light emitting portion of the plurality of light emitting diodes is disposed vertically at a position adjacent to one edge of the second substrate. The method of claim 12,
And a reflecting portion provided below the light guide portion, wherein the reflecting portion is disposed above the lower surface while covering a portion of the second substrate. The method of claim 12,
The connector includes a housing having one side open, a plurality of connection terminals arranged in the housing, and a plurality of lead parts extending outwardly of the housing to correspond to the plurality of connection terminals and mounted on the module substrate.
And the module substrate includes a plurality of terminal portions electrically connected to the plurality of connection terminals, respectively, and bonded to land portions of the second substrate. The method of claim 12,
The module substrate is a liquid crystal display, characterized in that provided in the form of a thin thin plate. A liquid crystal display including a metal PCB formed by stacking a first heat-dissipating metal substrate, an insulating layer, and a second substrate on which the plurality of light emitting diodes are mounted, and a connector module for supplying power to the plurality of light emitting diodes. In the light source unit of
The connector module includes a connector having a plurality of connection terminals, and a module substrate having a plurality of terminal parts on which the connector is mounted and electrically connected to the plurality of connection terminals.
The metal PCB is provided with a connector through-hole for installing the connector therethrough, and the second substrate at a position adjacent to the connector through-hole is provided with a plurality of land portions bonded to the plurality of terminal portions. Light source unit of the device. The method of claim 21,
And the plurality of light emitting diodes are spaced apart from each other in the longitudinal direction of the metal PCB to emit light toward the width direction of the metal PCB. The method of claim 22,
And the plurality of light emitting diodes are disposed adjacent to the length end of the width direction.

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