Display device

Patent metadata

Field	Value
Publication number	US-12200969-B2
Application number	US-201917310324-A
Country	US
Kind code	B2
Filing date	Nov 18, 2019
Priority date	Jan 29, 2019
Publication date	Jan 14, 2025
Grant date	Jan 14, 2025

Abstract

A display device includes: a display panel including sub-pixels and a heat dissipation pad electrically connected to at least one of the sub-pixels; a heat dissipation sheet on the heat dissipation pad; and an insulating heat dissipation adhesive layer between the heat dissipation sheet and the heat dissipation pad to adhere the heat dissipation sheet and the heat dissipation pad.

First claim

The invention claimed is:

1. A display device comprising:
a display panel comprising sub-pixels and a heat dissipation pad electrically connected to at least one of the sub-pixels;
a heat dissipation sheet on the heat dissipation pad;
a conductive line configured to electrically connect the at least one of the sub-pixels and the heat dissipation pad; and
an insulating heat dissipation adhesive layer between the heat dissipation sheet and the heat dissipation pad to adhere the heat dissipation sheet and the heat dissipation pad.

2. The display device of claim 1 , wherein:
the display panel further comprises a second power voltage line to which a second power voltage is applied; and
the conductive line crosses the second power voltage line.

3. The display device of claim 2 , wherein:
the display panel further comprises a sealant extending around a display region where the sub-pixels are disposed; and
the conductive line crosses the sealant.

4. The display device of claim 3 , wherein:
the sealant is at an outer side of the second power voltage line; and
the heat dissipation pad is at an outer side of the sealant.

5. The display device of claim 2 , wherein each of the sub-pixels comprises a light emitting element and a driving transistor,
wherein the driving transistor is configured to control currents flowing from a first power line, to which a first power voltage higher than the second power voltage is applied, to the light emitting element according to a data voltage applied to a gate electrode thereof.

6. The display device of claim 5 , wherein:
the first power voltage is applied to the conductive line; and
the conductive line is on the second power voltage line.

7. The display device of claim 5 , wherein each of the sub-pixels further comprises an initialization transistor configured to initialize the gate electrode of the driving transistor to an initialization voltage.

8. The display device of claim 7 , wherein:
the initialization voltage is applied to the conductive line; and
the conductive line is on the second power voltage line.

9. The display device of claim 5 , wherein each of the sub-pixels further comprises a scan transistor configured to supply the data voltage to the gate electrode of the driving transistor according to a scan signal.

10. The display device of claim 9 , wherein:
the data voltage is applied to the conductive line; and
the conductive line is on the second power voltage line.

11. The display device of claim 9 , wherein:
the scan signal is applied to the conductive line; and
the conductive line is on the same layer as the second power voltage line.

12. The display device of claim 11 , wherein the conductive line comprises a scan connection electrode on the second power voltage line.

13. The display device of claim 5 , wherein each of the sub-pixels further comprises a light emission control transistor configured to block currents flowing from the first power line to the light emitting element through the driving transistor according to a light emission control signal.

14. The display device of claim 13 , wherein:
the light emission control signal is applied to the conductive line; and
the conductive line is on the same layer as the second power voltage line.

15. The display device of claim 5 , wherein:
each of the sub-pixels further comprises a light blocking layer under an active layer of the driving transistor; and
the conductive line is connected to the light blocking layer.

16. The display device of claim 15 , wherein the conductive line is under the second power voltage line.

17. The display device of claim 1 , wherein:
the display panel further comprises a second power voltage line to which a second power voltage is applied; and
the conductive line is connected to the second power voltage line.

18. The display device of claim 1 , wherein:
the display panel comprises a first substrate and a second substrate on the first substrate; and
the heat dissipation pad is at one side of the first substrate that is not covered by the second substrate.

19. The display device of claim 18 , wherein the heat dissipation sheet is on a portion of an upper surface, one side surface, and a portion of a lower surface of the first substrate.

20. The display device of claim 18 , wherein the display panel further comprises display pads at another side of the first substrate that is not covered by the second substrate.

21. The display device of claim 20 , further comprising a flexible circuit board attached to the display pads of the display panel.

22. The display device of claim 1 , wherein the insulating heat dissipation adhesive layer is a thermally conductive silicon adhesive.

Assignees

• Samsung Display Co Ltd

Inventors

• Hwang Sejachul
• Kim Do Youb
• Choi Dong Wook

Classifications

• H10K59/805

  Electrodes · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/8794 Primary

  Arrangements for heating and cooling · CPC title

• H10K59/8792

  comprising light absorbing layers, e.g. black layers · CPC title

• H10K59/8722

  Peripheral sealing arrangements, e.g. adhesives, sealants · CPC title