Circular polarizer for an organic light emitting diode

• US 10,297,647 B2
• Filed: 08/05/2016
• Issued: 05/21/2019
• Est. Priority Date: 11/11/2015
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Wang, Yulin, Wang, Chun Jan
• Primary Examiner(s): Chambliss, Alonzo
• Application Number:
  US15/229,633
• Publication Number:
  US 20170133436A1
• Time in Patent Office: 1,019 Days
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 59/40 OLEDs integrated with touch screens
• CPC Class Codes: H10K 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/873 Encapsulations
• CPC Class Codes: H10K 59/8791 Arrangements for improving contrast, e.g. preventing reflection of ambient light

Abstract

An organic light-emitting diode (OLED) touch display device and a manufacturing method thereof are provided. The OLED touch display device includes an OLED display; and a phase difference plate, a touch layer and a linear polarizer sequentially disposed on a light-emitting side of the OLED display, in which the linear polarizer and the phase difference plate are combined to form a circular polarizer.

Claims

1. An organic light-emitting diode (OLE)) touch display device, comprising:

an OLED display;

a phase difference plate, a touch layer and a linear polarizer sequentially disposed on a light-emitting side of the OLED display, in which the linear polarizer and the phase difference plate are combined to form a circular polarizer; and

a transparent water-oxygen barrier layer disposed between the OLED display and the phase difference plate,

wherein the touch layer includes a touch pattern formed by a transparent conductive material,

wherein the water-oxygen barrier layer includes;

an organic layer and an inorganic layer sequentially disposed on the OLED display,

wherein the OLED display includes an encapsulation layer, and a first photosensitive adhesive is disposed between the water-oxygen barrier layer and the OLED display to cover lateral surfaces and an upper surface of the encapsulation layer.

2. The display device according to claim 1, wherein the OLED display includes:

a substrate and a drive circuit layer, a pixel emission layer and an encapsulation layer sequentially disposed on the substrate, in which the encapsulation layer is configured to encapsulate the drive circuit layer and the pixel emission layer together; and

light emitted by the pixel emission layer is emitted from the encapsulation layer.

3. The display device according to claim 2, wherein the encapsulation layer is one or a combination of an inorganic layer, an organic layer and a mixed layer of inorganic material and organic material.

4. The display device according to claim 1, wherein the phase difference plate is a quarter-wave plate.

5. The display device according to claim 1, wherein the linear polarizer includes:

a linear polarization layer in contact with the touch layer and an overcoat (OC) layer for covering the linear polarization layer.

6. The display device according to claim 5, wherein the linear polarization layer is made from polyvinyl alcohol (PVA), and the OC layer is made from triacetyl cellulose (TAC).

7. The display device according to claim 1, wherein the organic layer is made from polyethylene terephthalate (PET) or polyethylene naphthalate (PEN).

8. The display device according to claim 1, wherein the inorganic layer is made from at least one selected from the group consisting of aluminum oxide, titanium oxide, zirconium oxide, nitrogen oxide, silicon nitride and silicon carbonitride.

9. The display device according to claim 1, wherein the touch layer is in direct contact with the phase difference plate and the linear polarizer respectively.

10. The display device according to claim 1, wherein the first photosensitive adhesive is directly contacted with the water-oxygen barrier layer and the encapsulation layer.

11. The display device according to claim 1, further comprising a second photosensitive adhesive disposed at least one of between the phase difference plate and the touch layer and between the touch layer and the linear polarizer.

12. A method for manufacturing an organic light-emitting diode (OLED) touch display device, comprising:

forming a water-oxygen barrier layer on an OLED display;

forming a phase difference plate on the water-oxygen barrier layer;

forming a touch layer on the phase difference plate; and

forming a linear polarizer on the touch layer,

wherein the touch layer includes a touch pattern formed by a transparent conductive material,

wherein the linear polarizer and the phase difference plate are combined to form a circular polarizer,

wherein the water-oxygen barrier layer includes;

an organic layer and an inorganic layer sequentially disposed on the OLED display,

wherein before forming the water-oxygen barrier layer on the encapsulation layer of the OLED display, the method further comprises;

applying a photosensitive adhesive on a surface of one side of the OLED display provided with the encapsulation layer to cover lateral surfaces and an upper surface of the encapsulation layer; and

forming the water-oxygen barrier layer on the encapsulation layer of the OLED display includes;

forming the water-oxygen barrier layer on the photosensitive adhesive; and

bonding the OLED display and the water-oxygen barrier layer together.

13. The manufacturing method according to claim 12, wherein the OLED display includes:

a substrate and a drive circuit layer, a pixel emission layer and an encapsulation layer sequentially disposed on the substrate; and

forming the water-oxygen barrier layer on the OLED display includes;

forming the water-oxygen barrier layer on the encapsulation layer of the OLED display.

14. The manufacturing method according to claim 12, wherein the touch layer is directly formed on the phase difference plate, and the linear polarizer is directly formed on the touch layer.