Display device
A display device includes a display panel, a heat spread sheet below the display panel and in contact with a first surface of the display panel, and a heat storage sheet in contact with at least a portion of the heat spread sheet. The heat spread sheet includes a first phase change material. The heat storage sheet includes a second phase change material having a boiling point greater than a boiling point of the first phase change material.
1. A display device, comprising:
a display panel;
a heat spread sheet below the display panel and in contact with a first surface of the display panel; and
a heat storage sheet in contact with at least a portion of the heat spread sheet,
wherein the heat spread sheet includes a first phase change material, and
wherein the heat storage sheet includes a second phase change material having a boiling point greater than a boiling point of the first phase change material.
2. The display device of claim 1 , wherein the first phase change material includes a material whose phase is changed from liquid to gaseous states by receiving heat from the display panel.
3. The display device of claim 1 , wherein the second phase change material includes a material whose phase is changed from solid to liquid states by receiving heat from the heat spread sheet.
4. The display device of claim 1 , wherein a planar area of the heat spread sheet is greater than a planar area of the heat storage sheet.
5. The display device of claim 4 , wherein
the heat spread sheet is in contact with an entirety of the first surface, and
the heat storage sheet overlaps the heat spread sheet when viewed in a plan view.
6. The display device of claim 1 , wherein a volume of the heat storage sheet is greater than a volume of the heat spread sheet.
7. The display device of claim 1 , wherein
the heat storage sheet is provided in plural, and
a plurality of heat storage sheets are spaced apart from each other on a rear surface of the heat spread sheet.
8. The display device of claim 1 , wherein
each of the heat spread sheet and the heat storage sheet is provided in plural, and
a plurality of heat spread sheets and a plurality of heat storage sheets are disposed alternately with each other.
9. The display device of claim 1 , wherein
the heat spread sheet further includes a first heat transfer chamber which surrounds the first phase change material, and
the heat storage sheet further includes a second heat transfer chamber which surrounds the second phase change material.
10. The display device of claim 9 , wherein each of the first and second heat transfer chambers includes a metal whose thermal conductivity is high.
11. The display device of claim 1 , wherein the heat spread sheet includes:
a first part in which the first phase change material is disposed; and
a second part in which the first phase change material is not disposed.
12. The display device of claim 11 , wherein the heat storage sheet is in contact with the first part.
13. The display device of claim 1 , wherein
the display panel includes a base layer, a circuit layer on the base layer, and a display element layer on the circuit layer, and
the heat spread sheet overlaps the display element layer when viewed in a plan view.
14. A display device, comprising:
a display panel; and
a heat radiation sheet below the display panel and in contact with a first surface of the display panel,
wherein the heat radiation sheet includes:
a diffusion part adjacent to the display panel, wherein a first phase change material which receives heat from the display panel is disposed in the diffusion part;
a storage part adjacent to the first phase change material, wherein a second phase change material which receives heat from the first phase change material is disposed in the storage part; and
a heat transfer chamber which surrounds each of the first phase change material and the second phase change material,
wherein a thermal conductivity of the first phase change material is greater than a thermal conductivity of the heat transfer chamber.
15. The display device of claim 14 , wherein a boiling point of the second phase change material is greater than a boiling point of the first phase change material.
16. The display device of claim 15 , wherein
the first phase change material includes a material whose phase is changed from liquid to gaseous states by the heat from the display panel, and
the second phase change material includes a material whose phase is changed from solid to liquid states by the heat from the first phase change material.
17. The display device of claim 14 , wherein
the diffusion part is below the display panel, and
the storage part is below and overlaps the diffusion part when viewed in a plan view.
18. The display device of claim 14 , wherein a volume of the storage part is greater than a volume of the diffusion part.
19. The display device of claim 14 , wherein
each of the diffusion part and the storage part is provided in plural, and
a plurality of diffusion parts and a plurality of storage parts are disposed alternately with each other.
20. The display device of claim 14 , wherein
the display panel includes a base layer, a circuit layer on the base layer, and a display element layer on the circuit layer,
the diffusion part overlaps the display element layer when viewed in a plan view, and
the storage part does not overlap the display element layer when viewed in the plan view.