TWI497173B - Display device - Google Patents

Description

Display device

The present invention relates to a display device, and more particularly to a display device having a heat dissipation module.

In recent years, liquid crystal displays (LCDs) have been widely used in various electronic products such as computers, televisions, and mobile phones for displaying images because of their slimness and lightness. In detail, the liquid crystal display device mainly includes a backlight module and a panel. The backlight module emits light to the panel, and the panel converts light to form a desired color and image. Among them, the light source device used in the backlight module directly affects the performance and assembly cost of the backlight module. Light Emitting Diode (LED) is one of the light sources used in most liquid crystal displays because of its high brightness, small size, and low power consumption. In addition, compared with the direct type backlight module, the edge-lit backlight module using the light-emitting diode has been paid attention to because of its thin thickness, so that the liquid crystal display device achieves high brightness and narrow frame.

However, a large amount of heat is generated when the light-emitting diode emits light. When the liquid crystal display device uses the light-emitting diode as the light source, the heat generated by the operation of the light-emitting diode causes the temperature of the entire liquid crystal display device to rise, which is easy to affect. The normal operation of the liquid crystal display device even causes damage.

At present, the industry has developed a heat dissipation structure that connects the backlight module in a thermal contact manner to eliminate heat during operation of the backlight module. When the screen of the liquid crystal display device is larger, the brightness is higher, and the frame is narrower, the area of the heat dissipation structure connected to the backlight module is smaller, and the heat generated by the backlight module is higher, and the heat dissipation structure cannot be effectively excluded. Heat. Increasing the thickness of the heat dissipation structure and extending its length will result in a substantial increase in the cost of the heat dissipation structure and an increase in the overall thickness.

Therefore, there is an urgent need for a heat dissipating structure, which can effectively eliminate the heat generated when the liquid crystal display device operates while maintaining the high brightness, narrow bezel, and thin thickness characteristics of the liquid crystal display device.

In view of the above problems, the present invention discloses a display device and a heat dissipation module thereof, thereby solving the problem of heat dissipation during operation of the display device.

An embodiment of the invention includes a back frame, a light guide plate, a panel module, a light source module, and a heat dissipation module. The back frame has a first surface and a second surface opposite to each other and a side between the first surface and the second surface. The light guide plate is disposed on the second surface and has a light incident surface. The panel module is disposed on the light guide plate. The light source module is located on the side of the back frame and faces the light entrance surface. The heat dissipation module is in contact with the light source module and includes a body, a first extension plate and a second extension plate. The body is located at a side of the back frame and is in contact with the light source module, and the body has a longitudinal flow path extending along a side direction. First An extension plate extends outwardly from the body and is located on the first surface of the back frame. The second extension plate extends outward from the body. The first extension plate is interposed between the first surface and the second extension plate, and the first extension plate and the second extension plate are separated by a distance to form at least one lateral flow path connecting the longitudinal flow channels.

According to the display device disclosed in the present invention, when the light source module operates to generate heat, heat is transferred to the body of the heat dissipation module via heat conduction. Then, heat can be removed from the bottom to the top in the longitudinal flow path by heat convection in the longitudinal direction of the body along the side direction. Furthermore, the remaining heat transferred to the body is also transferred to the first extension plate and the second extension plate via heat conduction, and then radiated to the circumference of the first extension plate and the second extension plate by heat conduction. Since the first extension plate and the second extension plate have a lateral flow path at an angle with the longitudinal flow path, the air flow can enter from the lateral flow channels to the longitudinal flow path, accelerating the flow of the air flow in the longitudinal flow path, thereby improving the heat transfer efficiency. In this way, the overall heat dissipation efficiency of the heat dissipation module can be accelerated without increasing the thickness and length of the heat dissipation module, thereby saving production material costs.

The above description of the present invention and the following description of the embodiments of the present invention are intended to illustrate and explain the principles of the invention.

1‧‧‧ display device

11‧‧‧ Back frame

111‧‧‧ first surface

112‧‧‧ second surface

113‧‧‧ side

12‧‧‧Light guide plate

121‧‧‧Into the glossy surface

122‧‧‧Glossy surface

13‧‧‧ Panel Module

14‧‧‧Light source module

141‧‧‧Lighting parts

142‧‧‧ circuit board

15, 25, 35‧‧‧ Thermal Module

151, 251, 351‧‧‧ ontology

1511, 2511, 3511‧‧‧ longitudinal flow path

1512‧‧‧ motherboard

1512‧‧‧ side

1513‧‧‧First board

1514‧‧‧Second board

1515‧‧‧ third board

152‧‧‧First extension board

1521‧‧‧ third surface

1522‧‧‧ fourth surface

153‧‧‧Second extension board

1531, 2531, 3531‧‧ ‧ transverse flow path

1531a‧‧‧air inlet

1531b‧‧‧air outlet

1532‧‧‧ third surface

1533‧‧‧ fourth surface

154, 254‧‧ ‧ ribs

16‧‧‧Fixed parts

17‧‧‧Shell

18‧‧‧Optical film

A, B‧‧‧ airflow

D1‧‧‧First distance

D2‧‧‧Second distance

X, Y, Z‧‧‧ axial

θ, θ1‧‧‧ angle

1 is a front elevational view of a display device in accordance with an embodiment of the present invention.

Figure 2 is a schematic cross-sectional view of the display device of Figure 1 taken along line 2-2.

Figure 3 is a cross-sectional view of the display device of Figure 2 taken along line 3-3.

Fig. 4 is a schematic cross-sectional view showing a display device according to another embodiment of the present invention.

Fig. 5 is a schematic cross-sectional view showing a display device according to still another embodiment of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art. The following examples are intended to describe the present invention in further detail, but are not intended to limit the scope of the invention.

The present invention provides a display device for receiving electrical energy to emit a specific light from a display area thereof, thereby displaying a specific image for viewing by a user.

The following is a description of the structure of the display device of the present invention. Please refer to FIG. 1 and FIG. 2 together. FIG. 1 is a front view of a display device according to an embodiment of the present invention, and FIG. 2 is a schematic view of the display device. A schematic cross-sectional view of the display device of Fig. 1 along line 2-2. The display device 1 of the present invention comprises a back frame 11, a light guide plate 12, a panel module 13, a light source module 14, and a heat dissipation module 15. In this embodiment, the display device 1 further includes a casing 17 for covering the back frame 11, the light guide plate 12, the panel module 13, and the light source module. 14 and the heat dissipation module 15.

The back frame 11 has a first surface 111, a second surface 112 and a side 113. The first surface 111 and the second surface 112 are opposite to each other, and the side 113 is located between the first surface 111 and the second surface 112. The side edge 113 connects the first surface 111 and the second surface 112.

The light source module 14 is located at the side 113 of the back frame 11. In the embodiment and some other embodiments, the light source module 14 includes a circuit board 142 and a light-emitting component 141. The light-emitting component 141 is fixedly disposed and electrically connected to the circuit board 142. The illuminating member 141 is for emitting light. Circuit board 142 is used to transmit and process signals. In this embodiment and some other embodiments, the illuminating member 141 is a point light source, such as a light emitting diode, but the type of the illuminating member 141 is not intended to limit the present invention. In other embodiments, the illuminating member 141 is an Organic Light Emitting Diode (OLED).

The light guide plate 12 is disposed on the second surface 112 of the back frame 11, and the light guide plate 12 has a light incident surface 121, a bottom surface (not shown, which may be regarded as a surface adjacent to the second surface 112 of the back frame 11), and a light exit surface 122. . The bottom surface (not shown) and the light-emitting surface 122 are opposite to each other, and the light-incident surface 121 is located between the bottom surface (unmarked surface) and the light-emitting surface 122. The light-incident surface 121 is connected to the light surface 122 and the bottom surface (not labeled), that is, the light-emitting surface 122. It is located on the side of the light guide plate 12 away from the second surface 112 of the back frame 11. The light emitting member 141 faces the light incident surface 121. The light guide plate 12 is configured to receive the light emitted by the light-emitting member 141 from the light-incident surface 121, and the light is reflected inside the light guide plate 12, and then the light is emitted from the light-emitting surface 122. In this embodiment In other embodiments, the display device 1 further includes a light reflecting layer (not shown) disposed between the light guide plate 12 and the second surface 112 of the back frame 11. When the light inside the light guide plate 12 is incident on the light reflecting layer, it can be reflected by the light reflecting layer and emitted from the light emitting surface 122.

The panel module 13 is disposed on the light emitting surface 122 of the light guide plate 12 . The panel module 13 is configured to receive the light emitted from the light-emitting surface 122 and change the characteristics of the light by the mechanism in the panel module 13, and then emit the light from the panel module 13 to form a specific image. Like, for the user to watch. In other embodiments of the present embodiment, the display device 1 further includes a plurality of optical film layers 18 disposed between the panel module 13 and the light-emitting surface 122 of the light guide plate 12 for adjusting light. The panel module 13 can be referred to as a display panel, and includes a pair of substrates and a display medium layer sandwiched between the pair of substrates. Wherein, the display medium layer comprises a non-self-luminous material (for example: liquid crystal, electrophoresis, electrowetting, or other suitable materials, or a combination thereof), a self-luminous material (for example: an organic material, an inorganic material, or other suitable materials, Or a combination of the above, or other suitable materials, or a combination of the above. The material of the substrate may be glass, quartz, plastic, sapphire, or other suitable material, or a combination thereof. Furthermore, the pair of substrates may be divided into a plurality of sub-pixel regions, each sub-pixel region comprising at least one transistor, the source of which is connected to a data line, the drain of which is connected to a pixel electrode, and the gate of which is connected to a scan line. . In addition, the panel module 13 may also integrate other at least one electronic component, such as a touch component, a light sensing component, a photovoltaic device, or other suitable component, or a combination thereof, at least the above. An electronic component that can be externally attached to the display panel or built into the display panel.

The heat dissipation module 15 is in contact with the light source module 14 for removing heat generated by the light source module 14. In detail, the heat dissipation module 15 includes a body 151 , a first extension plate 152 , and a second extension plate 153 . The first extension plate 152 and the second extension plate 153 are spaced apart from each other and extend outward from the body 151. Therefore, a hollow shape is formed between the first extension plate 152 and the second extension plate 153.

The detailed structure of the ontology is described below. Please refer to "Fig. 2" and "3rd drawing" together, and "3rd drawing" is a schematic cross-sectional view of the display device of "Fig. 2" along line 3-3. In this embodiment and some other embodiments, the body 151 is located at the side 113 of the back frame 11 and contacts the circuit board 142 of the light source module 14, and the body 151 has a direction along the side 113 (the axial direction of the embodiment). Z) An extended longitudinal flow path 1511. In this embodiment, the body 151 is in thermal contact with the circuit board 142 in an adhesive manner, but is not intended to limit the present invention. In other embodiments, the fixing may be fixed to each other, for example, screws, rivets, and welding. Or other suitable fixing method. In this embodiment and some other embodiments, the body 151 includes a main board 1512, a first board member 1513, a second board member 1514, and a third board member 1515. The first plate member 1513 and the second plate member 1514 extend outward from the same side surface 1512a of the main plate 1512 (in the axial direction X of the embodiment), and the third plate member 1515 is away from the end portion of the second plate member 1514 away from the main plate 1512. Extending toward the first plate member 1513 (along the axial direction Y of the embodiment). One end of the first plate member 1513 is connected to the first extension plate 152, the first plate member The other end of the second plate member 1515 is connected to the second extension plate 153, the other end of the third plate member 1515 is connected to one end of the second plate member 1514, and the other end of the second plate member 1514 is connected to the main plate. 1512. Therefore, the main plate 1512, the first plate member 1513, the second plate member 1514, and the third plate member 1515 collectively surround the hollow longitudinal flow path 1511. In this embodiment, since the light source module 14 and the heat dissipation module 15 are both disposed on the side of the back frame 11, the extending direction (axial direction Z) of the longitudinal flow path 1511 is substantially parallel to the gravity direction. In addition, the extending direction of the longitudinal flow path 1511 is staggered with the extending direction of the first extending plate 152 extending outward from the body 151. Preferably, the extending directions of the two are orthogonal. The first plate member 1513 and the second plate member 1514 are separated by a first distance D1, that is, the first plate member 1513 and the second plate member 1514 are hollow.

The first extension plate 152 extends outward from the body 151 and is located on the first surface 111 of the back frame 11 , and the first extension plate 152 is interposed between the first surface 111 and the second extension plate 153 . The first extension plate 152 has a third surface 1521 and a fourth surface 1522 opposite to each other, and the third surface 1521 faces the first surface 111 of the back frame 11. The second extension plate 153 has a fifth surface 1532 and a sixth surface 1533 opposite to each other, and the fifth surface 1532 faces the fourth surface 1522 of the first extension plate 152. In this embodiment and some other embodiments, the display device 1 further includes a fixing member 16 . The first extension plate 152 of the heat dissipation module 15 is fixedly disposed on the first surface 111 of the back frame 11 by the fixing member 16 . Wherein the fixing member 16 comprises a screw, a rivet, a weld, or other suitable fixing member. In the present invention, the first extension plate 152 and the second extension plate 153 The second distance D2 is spaced apart to form a plurality of lateral flow passages 1531 that communicate with the longitudinal flow passages 1511. Among them, the lateral flow path 1531 also has a hollow shape. The heat dissipation module 15 can further include a plurality of ribs 154 respectively between the first extension plate 152 and the second extension plate 153 to separate the first extension plate 152 and the second extension plate 153. The plurality of lateral flow passages 1531 can also prevent the first extension plate 152 and the second extension plate 153 from being recessed, and maintain the second distance D2 with the support to make the lateral flow passage 1531 unblocked. The lateral flow passages 1531 each have an opposite air inlet 1531a and an air outlet 1531b, and the air outlet 1531b communicates with the longitudinal flow passage 1511. Meanwhile, an angle θ is sandwiched between the lateral flow path 1531 and the longitudinal flow path 1511, and the angle θ may be less than or equal to ninety degrees and greater than zero degrees.

Therefore, when the heat dissipation module 15 is in contact with the light source module 14, when the light source module 14 operates to emit heat, heat is transferred to the body 151 of the heat dissipation module 15 via heat conduction. Then, heat can be carried away from the bottom to the top of the longitudinal flow path 1511 of the body 151 in the lateral direction (for example, the axial direction Z of the present embodiment) by the air flow A in the longitudinal flow path 1511 by, for example, heat convection, for example, : The lower right corner of the display device 1 shown in FIG. 3 flows to the upper right corner or the lower left corner to the upper left corner, but is not limited thereto. Moreover, the heat transferred to the body 151 is also transferred to the first extension plate 152 and the second extension plate 153 via heat conduction, and then is thermally conducted to the circumference of the first extension plate 152 and the second extension plate 153. Cool down. Since the first extension plate 152 and the second extension plate 153 have a plurality of lateral flow paths 1531 at an angle θ with the longitudinal flow passages 1511, the air flow B can enter from the air inlets 1531a of the lateral flow passages 1531, and then from the air outlet. The port 1531b flows to the longitudinal flow path 1531. By the stack effect (Chimney Effect), the airflow B of the lateral flow path 1531 enters the longitudinal flow path 1511, and the airflow A of the accelerated longitudinal flow path 1511 flows from the bottom to the top (the direction shown in FIG. 3). Thereby improving the heat transfer efficiency. In this way, the overall heat dissipation efficiency of the heat dissipation module 15 can be accelerated.

In this embodiment and some other embodiments, the first distance D1 between the first plate member 1513 and the second plate member 1514 is greater than the second distance D2 between the first extension plate 152 and the second extension plate 153. Further, the cross-sectional area of the lateral flow path 1531 is as small as possible smaller than the cross-sectional area of the longitudinal flow path 1511. In this way, the airflow A generated in the longitudinal flow passage 1511 having a large cross-sectional area becomes the main airflow, and the airflow B in the lateral flow passage 1531 having a small cross-sectional area is facilitated to accelerate the airflow velocity to enhance the heat conduction effect. .

In other embodiments of this embodiment and some of the embodiments, the body 151 and the first extension plate 152 are made of metal or alloy. When the material of the body 151 and the first extension plate 152 is a metal or an alloy, the speed of heat conduction can be effectively improved. The second extension plate 153 and the rib 154 are made of plastic, and the rib 154 and the second extension plate 153 are integrally formed, and one end of the rib 154 away from the second extension plate 153 is attached to the first extension plate 152. In other embodiments, the ribs 154 can be assembled to the second extension panel 153. Moreover, when the material of the second extension plate 153 is plastic, the weight can be reduced and the cost can be effectively reduced. In addition, the length of the second distance D2 between the first extension plate 152 and the second extension plate 153 is about 1 mm to 2 mm, and the width of the heat dissipation module 15 is approximately equal to the width of the panel module 13 One-fifth. However, the above materials, dimensions, and manufacturing composition relationships are not intended to limit the present invention.

In addition, the heat dissipation module 15 of the present embodiment is located at the side end of the entire display device 1 such that the extending direction of the longitudinal flow path 1511 is substantially parallel to the direction of gravity. However, in other embodiments, the heat dissipation module 15 can be located at the top or bottom end of the display device 1 to contact the light source module 14 at the top or bottom end. At this time, the lateral flow path 1531 extends in the axial direction Z, and the longitudinal flow path 1511 extends in the axial direction X. In this way, the heat dissipation module 15 can also dissipate heat by the air flow guiding of the lateral flow path 1531 and the longitudinal flow path 1511.

Please refer to FIG. 4, which is a schematic cross-sectional view of a display device according to another embodiment of the present invention. The embodiment is similar to the above embodiment, and the difference is that in the heat dissipation module 25 of the embodiment, the lateral flow path 2531 and the longitudinal flow path 2511 formed by the body 251 are respectively provided with an angle θ1, and the angle θ1 is approximately equal to ninety. degree. Therefore, the air flow B can also enter the longitudinal flow path 2511 from the outside through the lateral flow path 2531 between the ribs 254 to increase the air flow A rate of the longitudinal flow path 2511, thereby increasing the heat conduction rate and improving the overall heat dissipation efficiency.

Please refer to FIG. 5, which is a schematic cross-sectional view of a display device according to still another embodiment of the present invention. This embodiment is similar to the above embodiment, except that the heat dissipation module 35 does not have ribs, and the lateral flow path 3531 of the body 351 has only one lateral flow path 3531. The air flow B in the lateral flow path 3531 can flow directly to the longitudinal flow path 3511 without being guided by the ribs. So, you can The flow A of the longitudinal flow path 3511 is accelerated.

In summary, in the display device disclosed in the present invention, when the light source module operates to generate heat, heat is transferred to the body of the heat dissipation module via heat conduction, and then the heat can be along the longitudinal direction of the body along the side direction. The heat flow in the longitudinal flow path is removed from the bottom up by means of thermal convection. Furthermore, the remaining heat transferred to the body is also transferred to the first extension plate and the second extension plate via heat conduction, and then radiated to the circumference of the first extension plate and the second extension plate by heat conduction. Since the first extension plate and the second extension plate have a plurality of lateral flow paths at an angle with the longitudinal flow passage, the air flow can enter from the lateral flow passages to the longitudinal flow passages, accelerating the flow of the longitudinal flow passages, thereby improving the heat transfer efficiency. In this way, the overall heat dissipation efficiency of the heat dissipation module can be accelerated without increasing the thickness and length of the heat dissipation module, thereby saving production material costs.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

1‧‧‧ display device

11‧‧‧ Back frame

111‧‧‧ first surface

112‧‧‧ second surface

113‧‧‧ side

12‧‧‧Light guide plate

121‧‧‧Into the glossy surface

122‧‧‧Glossy surface

13‧‧‧ Panel Module

14‧‧‧Light source module

141‧‧‧Lighting parts

142‧‧‧ circuit board

15‧‧‧ Thermal Module

151‧‧‧Ontology

1511‧‧‧ longitudinal flow path

1512‧‧‧ motherboard

1512a‧‧‧ side

1513‧‧‧First board

1514‧‧‧Second board

1515‧‧‧ third board

152‧‧‧First extension board

1521‧‧‧ third surface

1522‧‧‧ fourth surface

153‧‧‧Second extension board

1531‧‧‧lateral flow path

1532‧‧‧ third surface

1533‧‧‧ fourth surface

154‧‧‧ Ribs

16‧‧‧Fixed parts

17‧‧‧Shell

18‧‧‧Optical film

D1‧‧‧First distance

D2‧‧‧Second distance

X, Y, Z‧‧‧ axial

Claims (10)

A display device comprising: a back frame having a first surface and a second surface and a side between the first surface and the second surface; a light guide plate disposed on the second surface And having a light-emitting surface; a panel module disposed on the light guide plate; a light source module disposed on the side of the back frame and facing the light-incident surface; and a heat dissipation module contacting the light-emitting module The light source module includes: a body on the side of the back frame and contacting the light source module, and the body has a longitudinal flow path extending along the side direction; a first extension plate from the body Extending outwardly and on the first surface of the back frame; and a second extension plate extending outwardly from the body, the first extension plate being interposed between the first surface and the second extension plate, and the The first extension plate and the second extension plate are spaced apart by a distance to form at least one lateral flow path that communicates with the longitudinal flow path. The display device of claim 1, wherein the extending direction of the longitudinal flow path is orthogonal to an extending direction of the first extension plate extending outward from the body. The display device of claim 1, wherein the main body comprises a main board, a first board, a second board and a third board, the first board and the second board are from the main board The first plate extends outwardly from the end of the second plate member away from the main plate toward the first plate member, and the first plate member and the third plate member are respectively connected to the first extension plate And the second extension The board, the first board, the second board, and the third board together form the longitudinal flow path. The display device of claim 3, wherein the first panel and the second panel have a first distance therebetween, and the first extension panel and the second extension panel have a second distance therebetween, The first distance is greater than the second distance. The display device of claim 1, wherein the material of the second extension plate is plastic, and the material of the body and the first extension plate is metal. The display device of claim 1, wherein the heat dissipation module further comprises at least one rib between the first extension plate and the second extension plate to extend the first extension plate and the second extension plate A plurality of the lateral flow paths are separated from each other. The display device of claim 6, wherein the lateral flow channels are angled with the longitudinal flow path, the angle being less than or equal to ninety degrees and greater than zero degrees. The display device of claim 6, wherein the at least one rib is integrally formed with the second extension plate, and an end of the at least one rib away from the second extension plate is attached to the first extension plate. The display device of claim 1, further comprising a fixing member, wherein the first extension plate of the heat dissipation module is fixedly disposed on the first surface of the back frame by the fixing member. The display device of claim 1, wherein the light source module comprises a circuit board and a light emitting member, the circuit board is in contact with the body of the heat dissipation module, and the light emitting member is fixedly disposed on the circuit board and faces the display device The light incident surface of the light guide plate.