KR100837638B1 - Display Device - Google Patents

Abstract

The present invention, a light emitting panel; A protection unit attached to protect the light emitting panel; And a heat dissipation part disposed on the protection part and having a volume different from another area, the heat dissipation part including a heat dissipation layer, wherein the light emitting panel includes a driving device located on either side of the light emitting panel to supply a driving signal to the light emitting panel. The heat dissipation unit may include a display device having a large volume of at least one of a central area of the light emitting panel and an area adjacent to the driving device.

Display, heat sink, heat conduction

Description

Display Device

1A is a cross-sectional view of a display device having a conventional heat sink.

FIG. 1B is a diagram showing a region-specific heat distribution diagram of FIG. 1A on a panel; FIG.

2A is a cross-sectional view of a display device according to a first embodiment of the present invention.

FIG. 2B is a diagram showing a region-specific heat distribution diagram of FIG. 2A on a panel; FIG.

3A is a cross-sectional view of a display device according to a second embodiment of the present invention.

FIG. 3B is a graph showing a heat distribution diagram of regions of FIG. 3A; FIG.

4A and 4B are cross-sectional views of a display device according to a third embodiment of the present invention.

5 is a cross-sectional view of a display device according to a fourth exemplary embodiment of the present invention.

6 is a cross-sectional view of a display device according to a fifth exemplary embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

210, 310, 410, 510, 610: light emitting panel 220, 320, 420, 520, 620: protection part

230, 330, 430, 530, 630: heat dissipation

240, 340, 440, 540, 640: pad (or drive)

250, 350, 450, 550, 650: thermally conductive adhesive layer

260, 360, 460, 560, 660: thermally conductive pads

The present invention relates to a display device.

Recently, the importance of flat panel displays (FPDs) has increased with the development of multimedia. In response to this, a variety of flat panel displays such as a liquid crystal display (LCD), a field emission display (FED), a light emitting device (light emitting device), and the like have been put to practical use. In addition, among these, the electroluminescent display device is also being used as a BLU (Back Light Unit), a light source device (Light Source) and the like.

However, such display devices are provided with a heat sink for emitting heat generated inside the display device because high heat is generated in a high luminance area, a central area of the display device, or an adjacent area including a driving driver. .

FIG. 1A is a cross-sectional view of a conventional display device with a heat dissipation plate, and FIG. 1B is a view showing a thermal distribution diagram of regions of FIG. 1A on a panel.

Referring to FIG. 1A, in the display device 100 having a heat dissipation plate, the protection unit 120 is attached to the panel 110, and the heat dissipation plate 130 is attached to the protection unit 120. The panel 110 is provided with a pad 140 (or driving device) for receiving a driving signal from an external driving device.

Referring to FIG. 1B, a heat distribution diagram of the display device 100 as described above is illustrated.

As shown in the drawing, the conventional display device 100 includes the center "A1 area" of the panel 110 and the "A2 area" in which the pad 140 (or driving device) for supplying a driving signal to the panel 110 is formed. It can be seen that a higher heat generation than the region occurs.

However, since the heat dissipation plate 130 structure of the conventional display device 100 does not consider such a heat distribution, the heat dissipation fin 132 having a predetermined height is formed on the heat dissipation layer 131 to have a constant density. As in the "A1 region", the temperature emission in the region with high calorific value could not be effectively performed. And such a structural problem, it is not possible to effectively release the amount of heat generated in proportion to the size of the panel 110, eventually, the life and reliability of the panel 110 is reduced. On the other hand, the heat generation problem should be fully considered not only the "A1 area" of the panel 110, but also the "A2 area" to which the driving signal is supplied.

An object of the present invention for solving the above problems is to improve the life and reliability of the display device.

The present invention to solve the above problems, the light emitting panel; A protection unit attached to protect the light emitting panel; And a heat dissipation part disposed on the protection part and having a volume different from another area, the heat dissipation part including a heat dissipation layer, wherein the light emitting panel includes a driving device located on either side of the light emitting panel to supply a driving signal to the light emitting panel. The heat dissipation unit may include a display device having a large volume of at least one of a central area of the light emitting panel and an area adjacent to the driving device.

The heat dissipation unit may vary in volume depending on the height from the base surface of the heat dissipation layer to the outer surface of the heat dissipation layer.

The heat dissipation part includes a plurality of heat dissipation fins positioned on the heat dissipation layer, and the volume of the heat dissipation part may vary depending on the height, thickness, or spacing of the heat dissipation fins.

delete

The heat dissipation part includes a plurality of heat dissipation fins positioned on the heat dissipation layer, and the central area of the light emitting panel or an area adjacent to the driving device may have any one of a height or a thickness of the heat dissipation fins.

The heat dissipation part may include a plurality of heat dissipation fins positioned on the heat dissipation layer, and the center area of the light emitting panel or an area adjacent to the driving device may have a compact spacing of the heat dissipation fins.

The heat dissipation part may include a plurality of heat dissipation fins positioned on the heat dissipation layer, and a height and a thickness of the heat dissipation fins may be large in a central area of the light emitting panel or an area adjacent to the driving device.

The heat dissipation part may include a plurality of heat dissipation fins positioned on the heat dissipation layer, and the central area of the light emitting panel or an area adjacent to the driving device may have a high height and a thickness of the heat dissipation fins, and may have a tight spacing between the heat dissipation fins.

The heat dissipation part may include a plurality of heat dissipation fins positioned on the heat dissipation layer, and the height or thickness of the plurality of heat dissipation fins may be gradually reduced in either direction.

The heat dissipation fins may include one in which a bar connecting the upper portions of the heat dissipation fins is formed.

The light emitting panel includes a driving device formed on one side of the light emitting panel or a flexible film electrically connected to the light emitting panel to supply a driving signal to the light emitting panel, and a thermal conductive pad may be attached to the driving device.

Between the protective part and the heat dissipation part, a thermally conductive adhesive layer may be interposed.

The heat dissipation unit may be one of at least one of CNT, Cu, and Ag deposited to block external heat shielding and light.

The light emitting panel may be an organic electroluminescent panel.

The light emitting panel may be a liquid crystal display panel.

The light emitting panel may be a BLU or a light source.

First Embodiment

FIG. 2A is a cross-sectional view of a display device according to a first exemplary embodiment of the present invention, and FIG. 2B is a view showing a thermal distribution diagram of regions of FIG. 2A on a panel.

Referring to FIG. 2A, in the display device 200 according to the first embodiment of the present invention, the protection unit 220 is attached to the light emitting panel 210, and the heat dissipation unit 230 is formed on the protection unit 220. Is attached. The light emitting panel 210 is provided with a pad 240 (or driving device) for receiving a driving signal from an external driving device.

The protection part 220 is attached to protect the light emitting panel 210, and the heat dissipation part 230 is disposed on the protection part 220 so that some areas have different volumes from other areas, and include the heat dissipation layer 231. Is formed. In this case, the volume of the partial regions may be different from each other, in particular, the heat dissipation unit 230 may be formed to correspond to the heat generation temperature distribution of the light emitting panel 210 to increase heat dissipation in an area where the heat generating temperature of the light emitting panel 210 is high. The volume of the heat dissipation unit 230 is to be different.

Referring to FIG. 2B, heat distribution for each region is shown on the panel. In general, the display device 200 has a higher heat generation amount than the other regions in the center “B1 region” of the light emitting panel 210 and the “B2 region” to which the driving signal is supplied. Accordingly, the heat dissipation unit 230 according to the first embodiment of the present invention has a heat dissipation fin on the heat dissipation layer 231 in order to change the volume of the heat dissipation unit 230 as the heat generating temperature of the light emitting panel 210 increases. Form a field 232. Accordingly, the heat dissipation fins 232 may be formed such that the height of the heat dissipation fins 232 increases as the heat generation temperature of the light emitting panel 210 increases, or otherwise, the thickness of the heat dissipation fins 232 increases as the heat dissipation temperature of the light emitting panel 210 increases. ) Can be formed. In addition, the gap between the heat dissipation fins 232 increases as the heat generating temperature of the light emitting panel 210 increases.

However, the two or more structures as described above may be simultaneously applied to increase the height of the heat dissipation fins 232 and to form a thicker thickness or a space between the heat dissipation fins 232.

As such, when the distance between the heat dissipation fins 230 is changed according to the height and thickness of the heat dissipation fins 232 according to the surface heat generation temperature of the light emitting panel 210, the area in contact with convection in the air is increased or the heat generation amount is high. Convection flows to a lower region can be prevented, allowing more efficient heat dissipation.

The height of the heat dissipation fins 232 at a position corresponding to the region adjacent thereto and the center “B1 region” of the light emitting panel 210 in consideration of the heat generation amount of the “B2 region” in which the pad 240 (or the driving device) is formed. Alternatively, it may be advantageous to form the heat dissipation fins 232 such that any one or more of the thicknesses increase.

In addition, the thermally conductive pads 260 may be selectively attached to the pads 240 (or the driving apparatus, including the driving apparatus formed on the flexible film).

In addition, the thermal conductivity between the protection unit 220 and the heat dissipation unit 230 may be further increased between the protection unit 220 and the heat dissipation unit 230 through the thermally conductive adhesive layer 250.

Here, the thermally conductive pad 260 and the thermally conductive adhesive layer 250 may have a good adhesive strength with carbon, aluminum, stainless steel, metal, ceramic, glass, plastic, or the like, and have a high heat transfer coefficient. For example, a gel or a tape type such as thermal grease, thermal compound, thermal pad, or the like may be used, but is not limited thereto.

Although not shown, the light emitting panel 210 of the display device 200 according to the first exemplary embodiment of the present invention may be an organic electroluminescent panel having an organic light emitting layer formed between two electrodes, and a liquid crystal display device having a liquid crystal cell. It may be. The light emitting device may also be a BLU or a light source using an organic light emitting panel. That is, the light emitting panel 210 shown in the present invention is not limited to a specific display device, and it should be interpreted that the heat dissipating part 230 may be attached by changing the volume to correspond to the heat distribution of the light emitting panel 210.

Second Embodiment

FIG. 3A is a cross-sectional view of a display device according to a second exemplary embodiment of the present invention, and FIG. 3B is a graph illustrating a heat distribution chart for each region of FIG. 3A.

Referring to FIG. 3A, in the display device 300 according to the second embodiment of the present invention, a protection unit 320 is attached to the light emitting panel 310, and a heat dissipation unit 330 is disposed on the protection unit 320. Is attached. The light emitting panel 310 is provided with a pad 340 (or driving device) for receiving a driving signal from an external driving device.

The protection unit 320 is attached to protect the light emitting panel 310, and the heat dissipation unit 330 is disposed on the protection unit 320 so that some areas have different volumes from other areas, and include a heat dissipation layer 331. Is formed. In this case, the volume of the partial regions may be different from each other, in particular, the heat dissipation unit 330 may be formed to correspond to the heat generation temperature distribution of the light emitting panel 310 to increase heat dissipation in an area where the heat generating temperature of the light emitting panel 310 is high. The volume of the heat dissipation unit 330 is to be different.

3b is a graph showing heat distribution of each region. Here, it is assumed that the surface temperature of the display device 300 has a slope as shown from the region where the driving signal is supplied to the outside of the light emitting panel 310.

According to this assumption, the heat dissipation unit 330 according to the second embodiment of the present invention is gradually moved from the region where the driving signal is supplied to the outer region of the light emitting panel 310 with reference to the surface temperature gradient of the light emitting panel 310. The heat dissipation fins 332 may be formed on the heat dissipation layer 331 to be gradually lowered. In the second embodiment of the present invention, the heat radiation fins 332 are formed on the heat radiation layer 331 to change the volume of the heat radiation portion 330.

Here, although not shown in detail, it may be advantageous to form the gap between the heat dissipation fins 332 closer to the region where the heat generation temperature of the light emitting panel 310 is higher. The thickness of the heat dissipation fins 332 may be increased as the heat generating temperature of the light emitting panel 310 increases.

In addition, the thermally conductive pad 360 may be selectively attached to the pad 340 (or the driving device or the driving device formed on the flexible film) in consideration of the heat generation amount of the region to which the driving signal is supplied. In addition, the thermal conductivity between the protection part 320 and the heat dissipation part 330 may be further increased between the protection part 320 and the heat dissipation part 330 by selectively interposing a thermally conductive adhesive layer 350.

Although not shown, the light emitting panel 310 of the display device 300 according to the second exemplary embodiment of the present invention may be an organic light emitting display device having an organic light emitting layer formed between two electrodes, and a liquid crystal cell having a liquid crystal cell. It may be a display device. The light emitting device may also be a BLU or a light source using an organic light emitting display device. That is, the light emitting panel 310 shown in the present invention is not limited to a specific display device, and it should be interpreted that the heat dissipating part 330 can be attached by changing the volume to correspond to the heat distribution of the light emitting panel 310.

Third Embodiment

4A and 4B are cross-sectional views of a display device according to a third exemplary embodiment of the present invention.

Referring to FIG. 4A, in the display device 400 according to the third exemplary embodiment, a protection part 420 is attached to a light emitting panel 410, and a heat dissipation part 430 is provided on the protection part 420. Is attached. The light emitting panel 410 is provided with a pad 440 (or driving device) for receiving a driving signal from an external driving device.

The protection part 420 is attached to protect the light emitting panel 410, and the heat dissipation part 430 is disposed on the protection part 420, and has a different volume in some areas, and includes a heat dissipation layer 431. Here, the heat dissipation unit 430 may be formed to have a different volume in some areas. In particular, the heat dissipation unit 430 may be formed to correspond to the heat dissipation temperature distribution of the light emitting panel 410. The volume of the heat dissipation unit 430 may be changed so as to increase heat dissipation of the region.

Unlike the first or second embodiment described above, the heat dissipation unit 430 according to the third embodiment forms the surface shape of the heat dissipation layer 431 to correspond to the heat distribution of the light emitting panel 410, and the heat dissipation fins. By arranging the fields 432, the heat generation problem of the light emitting panel 410 may be solved.

Here, it is assumed that the amount of heat generated in the center "B1 region" of the light emitting panel 410 and the "B2 region" to which the driving signal is supplied is the highest with reference to the thermal distribution chart for each region shown in FIG. 2B.

In order to solve this problem, in the third embodiment, the height of the surface of the heat dissipating layer 431 increases as the heat generating temperature of the light emitting panel 410 increases. In addition, as the heat generating temperature of the light emitting panel 410 increases, the heat dissipation fins 432 become thicker or have a tighter spacing.

In the third embodiment, the volume of the heat dissipation layer 431 is changed so as to correspond to the heat distribution of the light emitting panel 410, and the heat dissipation fins ( 432 may be formed to have the same height. Meanwhile, referring to FIG. 4B, a bar connecting the upper portions of the heat dissipation fins 432 may be formed. Here, the upper portion of the heat dissipation fins 432 may not be formed at the same height as shown in the figure, but having the same height as shown in Figure 4b may take a structural advantage that can be easily attached to the heat radiation fan in the future.

In addition, the thermally conductive pad 460 may be selectively attached to the pad 440 (or the driving device or the driving device formed on the flexible film) in consideration of the amount of heat generated in the region to which the driving signal is supplied. In addition, the thermal conductivity between the protection part 420 and the heat dissipation part 430 may be further increased between the protection part 420 and the heat dissipation part 430 by selectively interposing the thermally conductive adhesive layer 450.

Fourth Embodiment

5 is a cross-sectional view of a display device according to a fourth exemplary embodiment of the present invention.

Referring to FIG. 5, unlike the respective embodiments described above, the display device 500 according to the fourth embodiment does not form heat dissipation fins on the heat dissipation layer, but radiates heat to correspond to the heat generation temperature distribution of the light emitting panel 510. The heat dissipation unit 530 having a different volume of the layer is formed.

Also in this fourth embodiment, the thermally conductive pad 560 may be selectively attached onto the pad 540 (or the driving device or the driving device formed on the flexible film), and the heat shield and the heat dissipation part 520 may be selectively attached. The thermal conductivity between the protective part 520 and the heat dissipation part 530 may be further increased between the parts 530 by selectively interposing the thermally conductive adhesive layer 550.

Fifth Embodiment

6 is a cross-sectional view of a display device according to a fifth exemplary embodiment of the present invention.

Referring to FIG. 6, the display device 600 according to the fifth embodiment radiates heat by using any one or more of CNT (carbon nanotube), Cu (copper), and Ag (silver) on the protection part 620. The portion 630 is formed. In the fifth embodiment, the heat dissipation unit 630 having a different volume of the heat dissipation layer is formed to correspond to the heat generation temperature distribution of the light emitting panel 610 as described above.

Such a heat dissipation unit 630 may be advantageous when the protection unit 620 is formed of a weak material such as transparent glass, when a heavy heat dissipation device or a heat dissipation material cannot be attached.

Here, materials such as CNT (carbon nanotube), Cu (copper), Ag (silver) is a function to block the external heat shielding and light to damage the organic material by the light incident inside the transparent protection unit 620 The phenomenon can also be prevented.

On the other hand, the heat dissipation unit 630 is not limited to the above-described materials such as CNT (carbon nanotube), Cu (copper), Ag (silver) is formed on the protection unit 620 by deposition, sputtering or coating Of course, as long as the material can be.

In this fifth embodiment, the thermally conductive pad 660 may be selectively attached to the pad 640 (or the driving device or the driving device formed on the flexible film) to solve the heat generation problem according to the driving signal. .

Although the light emitting panels 410, 510, and 610 of the display devices 400, 500, and 600 according to the third, fourth, and fifth exemplary embodiments of the present invention are not shown, an organic light emitting display in which an organic light emitting layer is formed between two electrodes is not shown. It may be a display device or a liquid crystal display device in which a liquid crystal cell is formed. The light emitting device may also be a BLU or a light source using an organic light emitting display device. That is, the light emitting panels 410, 510, and 610 according to the present invention are not limited to a specific display device, and the heat dissipating parts 430, 530, and 630 may have different volumes to correspond to the heat distribution of the light emitting panels 410, 510, and 610. Should be interpreted as possible.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art without changing the technical spirit or essential features of the present invention. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.

As described above, the present invention has the effect of improving the lifetime and reliability of the display device. In addition, there is an effect of effectively dissipating heat formed on the light emitting panel by varying the volume of the heat dissipation unit according to the heat distribution on the light emitting panel.

Claims (16)

Light emitting panel; A protection unit attached to protect the light emitting panel; And Located on the protective part and the volume is different from the other area, and includes a heat dissipation unit including a heat dissipation layer, The light emitting panel, A driving device positioned on either side of the light emitting panel to supply a driving signal to the light emitting panel; And the heat dissipation unit has a large volume of at least one of a central area of the light emitting panel and an area adjacent to the driving device. The method of claim 1, wherein the heat dissipation unit, And a height from a base surface of the heat dissipation layer to an outer surface of the heat dissipation layer is different. The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, The volume of the heat dissipation unit is changed by the height, thickness, or spacing of the heat dissipation fins. delete The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, And a height or a thickness of the heat dissipation fins is greater in a central area of the light emitting panel or in an area adjacent to the driving device. The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, And a plurality of heat dissipation fins in a central area of the light emitting panel or an area adjacent to the driving device. The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, And a height and a thickness of the heat dissipation fins are in a central area of the light emitting panel or in an area adjacent to the driving device. The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, The center area of the light emitting panel or the area adjacent to the driving device has a large height and thickness of the heat dissipation fins, and a spacing between the heat dissipation fins is dense. The method of claim 1, wherein the heat dissipation unit, It includes a plurality of heat dissipation fins are located on the heat dissipation layer, And a height or a thickness of the plurality of heat sink fins gradually decreases in either direction. The method of claim 3, wherein the heat dissipation fins, A display device comprising a bar connecting upper portions of heat dissipation fins. The method of claim 1, wherein the light emitting panel, A driving device formed on one of the light emitting panels or on a flexible film electrically connected to the light emitting panel to supply a driving signal to the light emitting panel, And a thermally conductive pad attached to the driving device. The method of claim 1, wherein between the protection unit and the heat dissipation unit, A display device comprising the thermally conductive adhesive layer interposed. The method of claim 1, wherein the heat dissipation unit, A display device, characterized in that formed with at least one of CNT, Cu, Ag to shield the external heat shielding and light. The method of claim 1, wherein the light emitting panel, A display device comprising an organic electroluminescent panel. The method of claim 1, wherein the light emitting panel, A display device characterized by being a liquid crystal display panel. The method of claim 1, wherein the light emitting panel, Display device, characterized in that the BLU (Back Light Unit) or a light source (Light Source).

Images