KR20140092170A - Display apparatus - Google Patents

Abstract

A display device according to an embodiment of the present invention includes a display panel; A back cover attached to a rear surface of the display panel; And a double-sided adhesive portion disposed between the display panel and the back cover and joining the display panel and the back cover. The double-sided adhesive portion is partially cut to form a cut portion, and the cut portion is provided with a heat dissipating member do.

Description

Display device {DISPLAY APPARATUS}

The present invention relates to a display device. And more particularly, to a display device that improves heat generation performance without increasing thickness.

(PDP), Electro Luminescent Display (ELD), Vacuum Fluorescent Display (VFD), and the like have been developed in recent years in response to the demand for display devices. Display) have been studied and used.

The display device includes a display module for forming an image and components provided behind the display module. As the heat generated from the components disposed behind the display module is transmitted to the display module, Resulting in degraded product reliability.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display device which improves product reliability by reducing unevenness of the screen temperature distribution and does not increase the thickness in order to solve the above problems.

A display device according to an embodiment of the present invention includes a display panel; A back cover attached to a rear surface of the display panel; And a double-sided adhesive portion disposed between the display panel and the back cover and joining the display panel and the back cover. The double-sided adhesive portion is partially cut to form a cut portion, and the cut portion is provided with a heat dissipating member do.

The heat dissipation member may be made of a material having excellent thermal conductivity.

The heat dissipating member may include at least one of aluminum, graphite, and copper.

The thickness in the front-rear direction of the heat radiation member may be equal to or less than the thickness in the front-back direction of the double-side bonding portion.

The back cover further includes a heat generating region which is heated by the heat generating unit, and the heat dissipating member is disposed at a position corresponding to at least a part of the edge of the heat generating region Position.

The heat dissipation member may include a region extending a predetermined width along at least a part of the edge of the heat generation region.

The heating unit may be a control board, and the heating area may be a region corresponding to the control board.

A display device according to an embodiment of the present invention includes: a plate coupled to a back surface of the back cover; And a control board coupled to the rear of the plate, wherein the heat generating unit is the control board and the heat generating area is the area corresponding to the control board.

A display device according to an embodiment of the present invention includes: a plate coupled to a back surface of the back cover; And a control board coupled to the rear of the plate, wherein the plate includes a metal region, and the heat generating region may correspond to a metal region of the plate.

The heat generating region may be a portion in surface contact with the plate.

At least a part of the outer edge of the heat radiation member may be located further outward than the outer edge of the heat generation region.

At least a part of the inner edge of the heat generating member may be located further inside than the inner edge of the heat generating region.

According to the present invention, it is possible to improve the product reliability by keeping the heat radiation performance constant without increasing the thickness of the display device, and preventing a temperature deviation from being generated severely in a specific region.

1 is a perspective view schematically showing a part of a display device according to an embodiment of the present invention.
FIG. 2 is a perspective view schematically showing a state in which the rear cover is removed in FIG. 1. FIG.
3 is a cross-sectional view taken along line III-III 'of FIG.
4 is a double-sided adhesive tape used in a display device according to an embodiment of the present invention.
FIG. 5 is a view showing a state where a heat dissipating member is placed on a cut portion of the double-sided adhesive portion of FIG. 4;
FIG. 6 and FIG. 7 are diagrams showing a case where the heat radiation member of FIG. 5 is not applied and a case where the temperature distribution is measured.
8 is a view showing another embodiment of the double-sided adhesive portion and the heat radiation member.
FIGS. 9 and 10 are views showing the case where the double-sided adhesive portion and the heat radiation member of FIG. 8 are not applied and the temperature distribution is measured when applied.

Hereinafter, a configuration of a display device according to an embodiment of the present invention will be described with reference to the accompanying drawings. Hereinafter, a configuration of a display device according to an embodiment of the present invention will be described in which a part of one member is disposed in correspondence with a part of the other member. In view of the front or rear view, Quot; means that a portion is disposed at the same position as a portion of another member. Further, in describing the positional relationship among the respective components, the inner side means a side closer to the center when viewed from the front or rear side, and the outer side means a side farther from the center.

FIG. 1 is a perspective view schematically showing a part of a display device according to an embodiment of the present invention. FIG. 2 is a perspective view schematically showing a state in which the rear cover 20 is removed in FIG. 1, 4 is a view illustrating a double-sided adhesive portion used in a display device according to an embodiment of the present invention, and Fig. 5 is a cross-sectional view taken along the line III-III ' And the heat dissipating member is located.

Referring to FIG. 1, a display device according to an embodiment of the present invention includes a display module 10 for displaying an image, and a rear cover 20 coupled to the rear of the display module 10.

3, the display module 10 includes a display panel 11, a back cover 12 coupled to a rear surface of the display panel 11, And a first double-sided adhesive portion 13 positioned between the display panel 11 and the back cover 12 and coupling the display panel 11 and the back cover 12 to each other.

Here, the display panel 11 may be an OLED panel that displays an image using an organic light emitting device (OLED).

Organic light emitting devices (OLEDs) have a structure in which an organic light emitting layer in the form of a functional thin film is inserted between an anode electrode and a cathode electrode, in which holes are injected from the anode and electrons are injected from the cathode, The excitons are formed by bonding holes, and the excitons emit light while recombining light.

As a method of implementing a full color organic light emitting display, there are an independent light emitting method, a color filter method, and a color conversion method. In the independent light emission method, R, G, and B are implemented by performing thermal deposition using a metal shadow mask in which light emitting materials of R, G, and B are precisely patterned. In the color filter method, R, G, and B are implemented by forming a white light emitting layer and patterning R, G, and B color filters. In the color conversion method, R, G, and B are implemented using a color conversion layer in which a blue light emitting layer is formed and a blue color is changed to green and red.

On the other hand, the back cover 12 is a plate-shaped member which is joined to the rear of the display panel 11 to reinforce the rigidity. The back cover 12 is made of a material capable of maintaining a certain level of strength or more even with a thin thickness. For example, CFRP Carbon Fiber-reinforced Plastic).

A first double-sided adhesive portion 13 is positioned between the display panel 11 and the back cover 12. The first double-sided adhesive portion 13 has a thin thickness in the front-rear direction and serves to connect the display panel 11 and the back cover 12. [ For example, the first double-sided adhesive portion 13 has an adhesive force on both the front and back surfaces, the front surface is attached to the back surface of the display panel 11, and the back surface is attached to the front surface of the back cover 12 have. However, the first double-sided adhesive portion 13 is not limited to the double-sided adhesive tape. The first and the second double-sided adhesive portions 13 may be provided on both the display panel 11 and the back cover 12 so that the display panel 11 and the back cover 12 Various materials and forms of materials can be used as long as they can be firmly coupled to each other.

As shown in FIG. 4, the first double-sided adhesive portion 13 is provided with a cut-out portion 131 penetrating in the front-back direction. The cut-out portion 131 is provided with a heat- (51). FIG. 5 shows a cutout 131 shown in FIG. 4 in which a heat radiating member 51 having the same shape and size as the cutout 131 is provided. The shapes and sizes of the cutouts 131 and the heat radiating members 51 will be described in detail later.

Referring to FIG. 3, a plate 31 is coupled to the back of the back cover 12. The plate 31 may be made of a metal having excellent thermal conductivity (heat dissipating performance) or may be made of a material having poor heat conduction performance, whereby the shape and size of the heat dissipating member 51 may be changed. This will be explained in detail later. On the other hand, the plate 31 can be omitted.

On the other hand, a second double-sided adhesive portion 32 is positioned between the plate 31 and the back cover 12. The front surface of the second double-sided adhesive portion 32 is adhered to the back surface of the back cover 12, and the back surface is attached to the front surface of the plate 31 do. Thus, an adhesive force is applied to both the back cover 12 and the plate 31 so that the back cover 12 and the plate 31 can be firmly fixed to each other. Like the first double-sided adhesive portion 31, the second double-sided adhesive portion 32 may be a double-sided adhesive tape, or may be an adhesive material of various other materials and shapes.

On the other hand, a control board 40 is provided behind the plate 31. The control board 40 includes a power supply unit 41 for converting the driving power into driving power for driving the display module 10, a main board 42 for generating a video signal for driving the display module 10, ), And a T-con board 43 (timing controller). The power supply unit 41, the main board 42, the T-con board 43 and the like constituting the control board 40 are all relatively narrow in the fore and aft direction and the areas in the up, It has a wide board shape and generates heat when driving. Therefore, the control board 40 may be a heat generating part. The heat generating portion is located behind the display module 10 and is defined as a portion that generates heat by itself.

The control board 40 provided behind the plate 31 is not limited to the three power supply units 41, the main control board 42 and the T-con board 43, Only a part of these three may be included, and in addition to these three, components having another control function may be further included. Also, without the plate 31, the control board 40 may be directly coupled to the back of the back cover 12. [

The rear cover 20 is located behind the control board 40 and covers the rear of the control board 40 to protect the control board 40.

Hereinafter, the first double-sided adhering portion 13, the heat radiating member 51, and the heat generating portion mentioned above will be described in more detail.

4 shows a state in which a cutout 131 is formed in the first double-sided adhesive portion 13 and FIG. 5 shows a state in which the heat dissipating member 51 is coupled to the cutout 131, 7 is a view showing a temperature distribution when the heat generating member 51 having the shape as shown in Fig. 5 is provided; Fig. 7 is a view showing a temperature distribution when the heat generating member 51 is not provided; to be.

The first double-sided adhesive portion 13 has a thin thickness in the front-back direction and extends over a large area in the up-down, left-right direction.

The outer edge portion defining the area of the first double-sided adhering portions 13 and 32 is formed on the outer edge of the member attached to the front surface of the double-sided adhesive portions 13 and 32 and the member attached to the rear surface, Or located inside thereof.

Therefore, the outer edge of the first both-side adhesive portion 13 is located at a position corresponding to the edge of the side of the display panel 11 and the back cover 12 where the outer edge is located further inside, .

On the other hand, in the first double-sided adhesive portion 13, a cutout portion 131 as shown in FIG. The cut-out portion 131 may be formed such that a part of the first double-sided adhesive portion 13 passes through in the front-rear direction. The heat dissipating member 51 is located inside the cutout 131.

The heat dissipating member 51 has a size and a shape that are substantially the same as or somewhat smaller than the cutout 131 when seen from the front or rear side. That is, it can be seen that it has a smaller area. This is because the heat dissipating member 51 must be located inside the cut-out portion 131.

The thickness of the heat dissipating member 51 in the front-rear direction may be substantially equal to or slightly smaller than the thickness in the front-rear direction of the first double-sided adhesive portion 13. When the thickness of the heat radiation member 51 in the back and forth direction is larger than the thickness in the front and back direction of the first double-sided adhering portion 13, This may cause a phenomenon of deterioration in adhesive strength.

The heat dissipation member 51 is made of a material having excellent thermal conductivity and may be made of a material such as aluminum (Al), graphite, copper, or the like.

The position and size of the heat radiation member 51 and the cutout 131 correspond to the position and size of the heat generation region formed in the back cover 12, To the position and size of the heat-generating portion provided at the rear of the heat-

The heating unit is coupled to the back of the back cover 12 and generates heat during operation of the display device. For example, it may be a control board 40 as shown in FIG.

The heat generating area A1 is a part of the back cover 12, which mainly receives the heat of the heat generating part. Accordingly, when the heat generating portion is directly coupled to the back of the back cover 12, the heat generating region A1 has a shape corresponding to the shape of the heat generating portion.

However, when the plate 30 is coupled to the rear of the back cover 12 and the heat generating portion is coupled to the rear of the plate 30, the shape and size of the heat generating region A1 are set such that the material of the plate 30 ≪ / RTI >

For example, when the plate 30 includes a metal having an excellent heat diffusion performance, the heat generating region may have a shape corresponding to a region of the metal of the plate 30. When the control board 40 is coupled to the metal plate 30 and the metal plate 30 is coupled to the back surface of the back cover 12, 12 may correspond to the shape of the metal plate 30. More specifically, the heat generating region A1 may be a portion in surface contact with the plate 30. [

However, when the plate 30 is made of a material having poor heat diffusion performance, the heat generating region A1 may correspond to the shape of the heat generating portion, not the shape of the plate 30. [ For example, the shape of the control board 40. 2, when the control board 40 includes a power supply unit 41, a main board 42, and a T-con board 43, Three pieces may be formed at positions corresponding to the power supply unit 41, the main board 42, and the T-con board 43, respectively.

In the case where the plate 30 is made of a material having excellent thermal diffusivity and heat is generated in the heat generating portion, the heat is transmitted to the back cover 12 while the heat is diffused uniformly throughout the plate 30. Therefore, The plate 30 has a shape corresponding to the shape of the plate 30. However, when the heat dissipation performance of the plate 30 is low, when heat is generated in the heat generating portion, only the temperature of the portion corresponding to the heat generating portion is locally raised, Since the heat is transferred to the heat generating region 12, the heat generating region A1 has a shape corresponding to the shape of the heat generating portion.

1 to 7, the display device according to the embodiment of the present invention is a control board 40 in which the plate 30 is made of metal and the heat generating part is coupled to the rear of the plate 30.

Therefore, as shown in Fig. 6, the heat generating region A1 has a shape corresponding to the shape of the plate. The cutout portion 131 and the heat generating member 51 have a shape capable of covering a position corresponding to the heat generating region A1. Therefore, as shown in FIG. 7, at least a part of the boundary line of the heat generating region A1 is located inside the area A2 corresponding to the heat generating member 51. [ 6 and 7, the dotted line indicates the heat generating area A1, and the two-dot chain line indicates the area A2 corresponding to the heat generating member 51. As shown in FIG.

That is, the heating member 51 has a predetermined width so as to cover the boundary of the heating region A1, and extends along at least a part of the boundary line of the heating region A1. The outer boundary of the heat generating member 51 is located outside the center line of the heat generating region A1 and the inner boundary of the heat generating member 51 is located outside the boundary of the heat generating region A1 (Closer to the center).

More specifically, when the edge of the heat generating region extends along the dotted line defining the region A1 and the edge of the region corresponding to the heat generating member 51 extends along the two-dot chain line defining the region A2, The region A2 has an inner edge spaced by W / 2 in a dotted line from the inner edge of the dotted line and an outer edge distanced by W / 2 from the line E outwardly and has a width of approximately W, Lt; / RTI > 4 and 5, the cutout 131 and the heat radiating member 51 have a substantially "C" shape so as to cover the upper edge, the left edge, and the right edge of the heat generating area A1. In addition, Quot; "-shaped shape to further include the lower edge.

6 is a view showing the temperature distribution when the incision part and the heat generating member are not provided. Fig. 7 is a view showing the temperature distribution when the heat generating member having the shape as shown in Fig. 5 is provided to be.

In FIG. 6, a temperature change rapidly appears inside and outside the boundary line of the heat generating region A1. However, in FIG. 7, it can be seen that the heat generating member 51 having excellent heat diffusing performance alleviates the temperature change .

6, it can be seen that not only the maximum temperature is higher than that in FIG. 7 but also the temperature change rapidly occurs at the portion corresponding to the heat generating region A1 and at the outer portion thereof. 7, the maximum temperature is lower than that in the case of FIG. 6, the temperature difference between the portion corresponding to the heat generating region A1 and the surrounding portion is relatively small, and a gradual temperature change Respectively.

When the display device is used for a long period of time, if the heat diffusion is not properly performed, a deteriorated shape occurs due to high temperature, and the life of the product becomes shorter than the expected lifetime. Particularly, when the temperature difference at the interface between the high temperature part and the low temperature part becomes large, the difference between the part where the degradation phenomenon progresses relatively fast and the part where the deterioration phenomenon progresses relatively becomes more clear, and the image quality deterioration can be intensified. For example, the temperature difference at an arbitrary interface is preferably 4 占 C or less.

6, in which the cutouts 131 and 51 are not applied, and FIG. 7, in which the cutouts 131 and the heat radiating members 51 are applied, Not only the temperature is lower as a whole but also the temperature difference occurring at a specific interface is relatively small, so that the effect of extending the life of the product is obtained.

8 is a view showing a first double-sided adhering portion 13a and a heat radiating member 51a according to another embodiment of the present invention. 9 is a view showing a temperature distribution when the heat radiating member 51a is not applied, and FIG. 10 is a view showing a temperature distribution when the heat radiating member 51a is applied.

The heat dissipating member 51 has a shape covering only the rim portion of the heat generating region A1 with a predetermined width in the above embodiment, Has a slightly larger area, and has a shape covering the entire heat generating area A1. Therefore, the two-dot chain line defining the region A2 corresponding to the heat radiation member 51 surrounds the outside of the heat generation region A1.

Even in this case, it is possible to prevent the occurrence of a rapid temperature difference on the display module, thereby extending the service life of the product.

In the case of adopting the configuration as in the above-described embodiments, when the design of the product is finished and the position of the heat generating part such as a control board is determined, the heat distribution is predicted, the problematic part is detected, The cutout portion and the heat radiation member can be designed. That is, when the problem area is detected, the position and shape of the cut portion to be formed on the double-sided adhesive portion are determined, and the shape of the heat radiation member corresponding to the shape is determined.

Therefore, it is possible to improve the heat generation performance without increasing the thickness, to improve the product reliability, and to solve the heat dissipation problem at low cost, so that the adhesion reliability can be maintained almost without increase in the manufacturing cost.

10: Display module 11: Display panel
12: back cover 13: first double-
131: incision section 20: rear cover
31: plate 32: second double-
40: control board 41: power supply unit
42: main board 43: T-con board
51, 51a: first heat-radiating member A1:
A2: area corresponding to the heat radiation member

Claims (12)

A display panel;
A back cover attached to a rear surface of the display panel;
And a double-sided adhesive portion positioned between the display panel and the back cover and coupling the display panel and the back cover,
Wherein the double-sided adhesive portion is partially cut to form a cut portion,
And the heat dissipation member is provided in the cutout portion.
The method according to claim 1,
Wherein the heat radiation member is made of a material having excellent thermal conductivity.
3. The method of claim 2,
The heat-
Aluminum, graphite, or copper.
The method according to claim 1,
Wherein the thickness of the heat dissipating member in the front-rear direction is equal to or smaller than the thickness of the double-
Display device.
The method according to claim 1,
Further comprising a heat generating unit disposed behind the back cover and generating heat,
Wherein the back cover is provided with a heat generating region heated by the heat generating unit,
Wherein the heat radiation member is provided at a position corresponding to at least a part of an edge of the heat generation region
Display device.
6. The method of claim 5,
Wherein the heat radiation member includes a region extending a predetermined width along at least a part of the edge of the heat generation region
Display device.
The method according to claim 5 or 6,
The heating portion is a control board,
The heating region is a region corresponding to the control board
Display device.
The method according to claim 5 or 6,
A plate coupled to a back surface of the back cover;
And a control board coupled to the rear of the plate,
Wherein the heating unit is the control board,
The heating region is a region corresponding to the control board
Display device.
6. The method of claim 5,
A plate coupled to a back surface of the back cover;
And a control board coupled to the rear of the plate,
The plate comprising a metal region,
The heat generating region is a region corresponding to the metal region of the plate
Display device.
10. The method of claim 9,
Wherein the heat generating region is a portion in surface contact with the plate.
6. The method of claim 5,
And at least a part of the outer edge of the heat radiation member is located further outward than the outer edge of the heat generation region
Display device.
12. The method of claim 11,
And at least a part of the inner edge of the heat generating member is located further inside than the inner edge of the heat generating region
Display device.

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