Top-emitting OLED display having transparent touch panel

• US 9,335,855 B2
• Filed: 07/19/2012
• Issued: 05/10/2016
• Est. Priority Date: 04/14/2006
• Status: Active Grant

• Current Assignee: RITDISPLAY CORPORATION
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Lai, Yuang Wei, Lin, Hsien Chang
• Primary Examiner(s): Merkoulova, Olga
• Application Number:
  US13/553,110
• Publication Number:
  US 20120306812A1
• Time in Patent Office: 1,391 Days
• Field of Search: 345/172, 345/168, 345/104, 345/156, 345/157, 345/87, 345/179, 345/102, 345 76- 83, 345/107, 345173-178, 341/23, 178/18.01, 178/18.03, 178/18.06, 178/18.07, 313463-572
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: H03K 17/962 Capacitive touch switches
• CPC Class Codes: H03K 2017/9602 characterised by the type or shape of the sensing electrodes
• CPC Class Codes: H03K 2217/96031 Combination of touch switch and LC display
• CPC Class Codes: H03K 2217/960755 Constructional details of capacitive touch and proximity switches
• CPC Class Codes: H03K 2217/960785 with illumination
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/871 Self-supporting sealing arrangements

Abstract

A top-emitting OLED display having a transparent touch panel includes a substrate, an upper cover plate, an OLED device, a capacitive touch device, and a protective layer. The OLED device is stacked on the substrate, and the capacitive touch device is stacked on upper surface of the upper cover plate. The capacitive touch device includes a capacitor structure which is composed of a first transparent conductive layer, an isolating layer, and a second transparent conductive layer. The protective layer is disposed on top of the capacitor structure.

Claims

1. A top-emitting organic light emitting diode (OLED) display having a transparent touch panel, comprising:

a substrate;

an upper cover plate;

an OLED device stacked on the substrate; and

a capacitive touch device stacked on a surface of the upper cover plate, and wherein the capacitive touch device comprises;

a first transparent conductive layer;

an isolating layer; and

a second transparent conductive layer; and

a protective layer;

wherein the first transparent conductive layer, the isolating layer, and the second transparent conductive layer form a capacitor, and the protective layer is disposed on the capacitor, and

wherein the capacitive touch device further comprises a polarizer disposed over the capacitor.

2. The top-emitting OLED display of claim 1, wherein the capacitive touch device stacked on the upper surface of the upper cover plate.

3. The top-emitting OLED display of claim 1, further comprising a sealant layer surrounding the OLED device, wherein the OLED device is sealed by the substrate, the sealant layer, and the upper cover plate;

and the upper cover plate is attached to the substrate by the sealant layer.

4. The top-emitting OLED display of claim 1, wherein the protective layer comprises inorganic materials selected from the group consisting of silicon oxide, silicon nitride, titanium oxide, and the combination thereof.

5. The top-emitting OLED display of claim 4, wherein the thickness of the protective layer is between a range of from 0.01 μ

m to 0.1 μ

m.

6. The top-emitting OLED display of claim 1, wherein the protective layer comprises organic materials selected from the group consisting of polyimide, poly(methyl methacrylate), and the combination thereof.

7. The top-emitting OLED display of claim 6, wherein the thickness of the protective layer is smaller than 2 μ

m.

8. The top-emitting OLED display of claim 1, wherein the protective layer is positioned on top of the polarizer.

9. The top-emitting OLED display of claim 1, wherein the polarizer is positioned on top of the protective layer.

10. The top-emitting OLED display of claim 1, wherein the material of the polarizer is selected from the group consisting of poly vinyl alcohol (PVA), triacetyl cellulose (TAC), cellulose diacetate (DAC), polyethylene terephthalate (PET), cyclo olefin polymer (COP), cyclic olefin copolymers (COC), polycarbonate (PC), and the combination thereof.

11. The top-emitting OLED display of claim 10, wherein the thickness of the polarizer is between a range of from 0.19 μ

m to 0.25 μ

m.

12. The top-emitting OLED display of claim 2, wherein the capacitive touch device further comprises an electromagnetic shielding layer disposed between the upper cover plate and the capacitor, and the shielding layer effectively reduces the electromagnetic interference between the OLED display and the capacitive touch device.

13. The top-emitting OLED display of claim 12, wherein the electromagnetic shielding layer comprises a polymer insulating layer and a third transparent conductive layer.

14. The top-emitting OLED display of claim 13, wherein the material of the polymer insulating layer is selected from the group consisting of epoxy, poly-imide, poly(methyl methacrylate), and the combination thereof.

15. The top-emitting OLED display of claim 13, wherein the third transparent conductive layer is selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), and the combination thereof.

16. The top-emitting OLED display of claim 1, wherein the first transparent conductive layer and the second transparent conductive layer are selected from the group consisting of indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), and the combination thereof.

17. The top-emitting OLED display of claim 1, wherein the OLED device comprises an anode layer, a light emitting layer, and a cathode layer.

18. The top-emitting OLED display of claim 1, wherein the isolating layer is selected from the group consisting of epoxy, poly-imide and methyl methacrylate.

19. The top-emitting OLED display of claim 1, wherein the substrate and the upper cover plate are selected from the group consisting of glass, polycarbonate, polyvinyl chloride, and the combination thereof.

20. A top-emitting organic light emitting diode (OLED) display having a transparent touch panel, comprising:

a substrate;

an upper cover plate;

an OLED device stacked on the substrate; and

a capacitive touch device stacked on a surface of the upper cover plate;

wherein the OLED device is enclosed by the substrate and the upper cover plate, and

wherein the capacitive touch device further comprises a capacitor and a polarizer disposed over the capacitor.

21. The top-emitting OLED display having a transparent touch panel of claim 20, further comprising a sealant layer for combining the substrate and the upper cover plate and enclosing the OLED device therebetween.

22. The top-emitting OLED display having a transparent touch panel of claim 20, wherein the capacitive touch device comprises a first transparent conductive layer, an isolating layer and a second transparent conductive layer sequentially formed on an upper surface of the upper cover plate, and the first transparent conductive layer and the second transparent conductive layer form the capacitor.

23. The top-emitting OLED display having a transparent touch panel of claim 22, wherein the capacitive touch device further comprises an electromagnetic shielding layer interposed between the first transparent conductive layer and the upper cover plate.

24. The top-emitting OLED display having a transparent touch panel of claim 20, wherein the capacitive touch device comprises a first transparent conductive layer, an isolating layer and a second transparent conductive layer sequentially formed on a lower surface of the upper cover plate, and the first transparent conductive layer and the second transparent conductive layer form a capacitor.

25. The top-emitting OLED display having a transparent touch panel of claim 24, wherein the capacitive touch device further comprises an electromagnetic shielding layer stacked on the second transparent conductive layer.

26. The top-emitting OLED display having a transparent touch panel of claim 25, wherein the electromagnetic shielding layer comprises a polymer insulating layer and a transparent conductive layer.

27. The top-emitting OLED display having a transparent touch panel of claim 26, wherein the material of the polymer insulating layer is selected from the group consisting substantially of epoxy, poly-imide and methyl methacrylate.

28. The top-emitting OLED display having a transparent touch panel of claim 26, wherein the transparent conductive layer is selected from the group consisting substantially of indium tin oxide (ITO), indium zinc oxide (IZO) and aluminum zinc oxide (AZO).

29. The top-emitting OLED display having a transparent touch panel of claim 20, wherein the OLED device comprises an anode layer, a light emitting layer and a cathode layer sequentially formed on the substrate.

30. The top-emitting OLED display having a transparent touch panel of claim 22, wherein the first transparent conductive layer and the second transparent conductive layer are selected from the group consisting substantially of ITO, IZO and AZO.

31. The top-emitting OLED display having a transparent touch panel of claim 22, wherein the isolating layer is selected from the group consisting substantially of epoxy, poly-imide and methyl methacrylate.

32. The top-emitting OLED display having a transparent touch panel of claim 20, wherein the substrate and the upper cover plate are selected from the group consisting substantially of glass, polycarbonate and polyvinyl chloride.