Top-emitting OLED display having transparent touch panel

• US 8,253,692 B2
• Filed: 04/12/2007
• Issued: 08/28/2012
• Est. Priority Date: 04/14/2006
• Status: Expired due to Fees

• Current Assignee: RITDISPLAY CORPORATION
• Original Assignee: RITDISPLAY CORPORATION
• Inventors: Lai, Yuang Wei
• Primary Examiner(s): Lao, Lun-Yi
• Assistant Examiner(s): Merkoulova, Olga
• Application Number:
  US11/783,842
• Publication Number:
  US 20070242055A1
• Time in Patent Office: 1,965 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: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/044 by capacitive means
• 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 2217/960755 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 display device, a capacitive touch device and a sealant layer. The OLED device is stacked on the substrate, the capacitive touch device is stacked on the upper cover plate, and the sealant layer combines the substrate and the upper cover plate such that the OLED device and the capacitive touch device are enclosed between the substrate and the upper cover plate. The capacitive touch device includes a first transparent conductive layer, an isolating layer, a second transparent conductive layer and an electromagnetic shielding layer sequentially formed on the upper cover plate. The electromagnetic shielding layer can effectively reduce the electromagnetic interfering between the OLED device and the capacitive touch device.

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;

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

a sealant layer surrounding the OLED device;

wherein the OLED device is enclosed 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; and

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,

wherein the capacitive touch device further comprises an electromagnetic shielding layer stacked on the second transparent conductive layer, said electromagnetic shielding layer effectively reduces the electromagnetic interfering between the OLED display and the capacitive touch device; and

wherein the electromagnetic shielding layer comprises a polymer insulating layer and a transparent conductive layer.

2. The top-emitting OLED display having a transparent touch panel of claim 1, wherein the material of the polymer insulating layer is selected from the group consisting substantially of epoxy, poly-imide and methyl methacrylate.

3. The top-emitting OLED display having a transparent touch panel of claim 1, 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).

4. The top-emitting OLED display having a transparent touch panel of claim 1, wherein the OLED device comprises an anode layer, a light emitting layer and a cathode layer sequentially formed on the substrate.

5. The top-emitting OLED display having a transparent touch panel of claim 1, wherein the first transparent conductive layer and the second transparent conductive layer are selected from the group consisting substantially of ITO, IZO and AZO.

6. The top-emitting OLED display having a transparent touch panel of claim 1, wherein the isolating layer is selected from the group consisting substantially of epoxy, poly-imide and methyl methacrylate.

7. The top-emitting OLED display having a transparent touch panel of claim 1, wherein the substrate and the upper cover plate are selected from the group consisting substantially of glass, polycarbonate and polyvinyl chloride.