KR-20260064834-A - DISPLAY DEVICE AND ELECTRONIC DEVICE INCLUDING THE SAME

Abstract

The display device comprises an elastic functional layer including an elastic material and a thermally conductive material, a support plate disposed on the elastic functional layer, a display panel disposed on the support plate, a circuit board disposed below the elastic functional layer, a first adhesive layer bonding the display panel and the support plate together, and a second adhesive layer bonding the elastic functional layer and the circuit board together and having a thermal conductivity greater than that of the first adhesive layer.

Inventors

• 유봉현
• 유제인

Assignees

• 주식회사 유비랩

Dates

Publication Date

20260508

Application Date

20241029

Claims (20)

1. Elastic functional layer comprising an elastic material and a thermally conductive material; A support plate disposed on the above elastic functional layer; A display panel disposed on the above support plate and comprising a plurality of pixels; A circuit board disposed below the elastic functional layer and electrically connected to the display panel; A first adhesive layer disposed between the display panel and the support plate in cross-section to bond the display panel and the support plate together; and A display device comprising a second adhesive layer disposed between the elastic functional layer and the circuit board in cross-section to bond the elastic functional layer and the circuit board together, and having a thermal conductivity greater than that of the first adhesive layer.
2. A display device according to claim 1, characterized in that the thermally conductive material comprises at least one selected from the group consisting of graphite powder, graphene, carbon fiber, carbon nanotube, and boron nitride (BN).
3. A display device according to claim 2, wherein the elastic material comprises at least one selected from the group consisting of silicon (Si), polyurethane (PU), thermoplastic polyurethane (TPU), and polydimethylacrylamide (PDMA).
4. A display device according to claim 1, characterized in that the weight ratio of the thermally conductive material included in the elastic functional layer is 50 wt% or less.
5. A display device according to claim 1, characterized in that the thickness of the elastic functional layer is 10 μm to 300 μm.
6. A display device according to claim 1, characterized in that the thermal conductivity of the elastic functional layer is 5W/(m·K) to 40W/(m·K).
7. In claim 1, the display panel includes a foldable area and a non-foldable area adjacent to the foldable area, and A display device characterized in that the width of the elastic functional layer is constant as it progresses from the non-folding region toward the center of the foldable region.
8. In claim 7, the support plate comprises an expandable portion disposed in the foldable area and a flat portion disposed in the non-foldable area, and A display device characterized by having a plurality of lattice holes defined in the above-mentioned expansion portion that penetrate the support plate in the thickness direction.
9. A display device according to claim 8, characterized in that the elastic functional layer overlaps with the entire stretchable portion on a flat plane.
10. A display panel comprising a plurality of pixels including a foldable region and a non-foldable region adjacent to the foldable region; An elastic functional layer comprising an elastic material and a thermally conductive material disposed in the foldable region and the non-foldable region below the display panel; A support plate disposed on the foldable region and the non-folding region on the elastic functional layer; A circuit board disposed in the non-folding area below the elastic functional layer and electrically connected to the display panel; A first adhesive layer disposed between the display panel and the support plate in cross-section to bond the display panel and the support plate together; A second adhesive layer disposed between the elastic functional layer and the circuit board in cross-section to bond the elastic functional layer and the circuit board together, and having a thermal conductivity greater than the thermal conductivity of the first adhesive layer; and An electronic device comprising the above-mentioned display panel, the above-mentioned elastic functional layer, the above-mentioned support plate, and a housing plate providing a space for accommodating the above-mentioned circuit board.
11. An electronic device according to claim 10, wherein the thermally conductive material comprises at least one selected from the group consisting of graphite powder, graphene, carbon fiber, carbon nanotube, and boron nitride (BN).
12. An electronic device according to claim 11, wherein the elastic material comprises at least one selected from the group consisting of silicon (Si), polyurethane (PU), thermoplastic polyurethane (TPU), and polydimethylacrylamide (PDMA).
13. An electronic device according to claim 10, characterized in that the weight ratio of the thermally conductive material included in the elastic functional layer is 50 wt% or less.
14. An electronic device according to claim 10, characterized in that the thickness of the elastic functional layer is 10 μm to 300 μm.
15. An electronic device according to claim 10, characterized in that the thermal conductivity of the elastic functional layer is 5W/(m·K) to 40W/(m·K).
16. In claim 10, the housing plate is, A housing disposed in the above-mentioned non-folding area and accommodating the circuit board; An electronic device characterized by including a hinge portion disposed in the foldable area and protruding from one side of the housing plate toward the interior of the housing plate.
17. An electronic device according to claim 16, characterized in that the elastic functional layer overlaps the entire hinge portion in a planar manner.
18. An electronic device according to claim 10, characterized in that the width of the elastic functional layer becomes constant as it moves from the non-folding region toward the center of the foldable region.
19. In claim 10, it further includes a battery module disposed in the non-folding area below the elastic functional layer and supplying power to the display panel, An electronic device characterized by the second adhesive layer bonding the battery module and the elastic functional layer together.
20. A display panel comprising a plurality of pixels including a foldable region and a non-foldable region adjacent to the foldable region; An elastic functional layer comprising an elastic material and a thermally conductive material disposed in the foldable region and the non-foldable region below the display panel; A support plate disposed on the foldable region and the non-folding region on the elastic functional layer; A circuit board disposed in the non-folding area below the elastic functional layer and electrically connected to the display panel; and It includes a housing plate comprising a housing disposed in the non-folding region and accommodating the circuit board, and a hinge portion disposed in the foldable region. The above elastic functional layer overlaps with the entire hinge portion on a plane, and An electronic device characterized in that the width of the elastic functional layer is constant as it progresses from the non-folding region toward the center of the foldable region.

Description

Display device and electronic device including the same The present invention relates to a display device and an electronic device including the same. More specifically, it relates to a flexible display device and an electronic device including the same. A display device is a device that displays images to provide visual information to a user. A display device may include electronic components such as a display panel containing multiple pixels that emit light, a circuit board for supplying electrical signals to the display panel, and a battery for supplying power to the display panel. While each of the multiple pixels is in operation, heat is generated in the circuit board and electronic components, and this heat generation phenomenon may cause problems in the operation of the display panel. Accordingly, a heat dissipation layer is placed on the back of the display panel to mitigate problems caused by this heat generation phenomenon. Recently, graphite sheets, which are heat-processed products of natural graphite, are generally used as heat dissipation layers to increase thermal conductivity. Meanwhile, flexible display devices are being developed to implement functions such as foldable, rollable, and stretchable, taking into account user convenience and portability. Since these stretchable display devices undergo deformation during use, a flexible elastic member is placed within the display device. Consequently, when a heat dissipation layer and an elastic member are placed simultaneously within a stretchable display device, there is a problem that the thickness of the display device increases. FIG. 1 is a perspective view showing an electronic device according to one embodiment of the present invention. FIG. 2 is a perspective view showing the folded state of the electronic device of FIG. 1. Figure 3 is a block diagram showing a display device included in the electronic device of Figure 1. Figure 4 is an exploded perspective view showing the electronic device of Figure 1 disassembled. Figure 5 is a cross-sectional view showing an example of a cross-section cut along the line I-I' of Figure 1. Figure 6 is a cross-sectional view showing a part of the display module of Figure 4. Figure 7 is a cross-sectional view showing another example of a cross-section cut along the line I-I' of Figure 1. Figure 8 is a cross-sectional view showing a part of the housing plate of Figure 4. FIG. 9 is a cross-sectional view showing the folded state of the housing plate of FIG. 8. Figure 10 is a diagram illustrating the heat dissipation effect of the electronic device of Figure 1. FIG. 11 is an exploded perspective view showing a conventional electronic device disassembled. Figure 12 is a cross-sectional view showing a cross-section cut along the line II-II' of Figure 11. FIG. 13 is a plan view comparing the electronic device of FIG. 1 and the conventional electronic device of FIG. 11. FIG. 14 is a perspective view showing an electronic device according to another embodiment of the present invention. FIG. 15 is a perspective view showing the electronic device of FIG. 14 in an extended state. FIG. 16 is a cross-sectional view showing a cross- section of the electronic device of FIG. 14. FIG. 17 is a cross-sectional view showing an extended cross-section of the electronic device of FIG. 14. FIG. 18 is a block diagram showing the electronic device of FIG. 1 and FIG. 14. With respect to the embodiments of the present invention disclosed in the text, specific structural or functional descriptions are provided merely for the purpose of explaining the embodiments of the present invention, and the embodiments of the present invention may be implemented in various forms and should not be interpreted as being limited to the embodiments described in the text. The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Terms such as "first," "second," etc., may be used to describe various components, but the components should not be limited by these terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. When it is stated that one component is “connected” or “connected” to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. Conversely, when it is stated that one component is “directly connected” or “directly connected” to another compon