Organic light emitting display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9368752-B2
Application number	US-201414519818-A
Country	US
Kind code	B2
Filing date	Oct 21, 2014
Priority date	Nov 11, 2013
Publication date	Jun 14, 2016
Grant date	Jun 14, 2016

Abstract

Disclosed is an organic light emitting display (OLED) device that may include first and second pixels on a substrate, each including a TFT region and a display region, the display region of each of the first and second pixels including a first electrode, an emission layer and a second electrode; a color filter layer in the display region of the second pixel; and a reflection preventing layer in the first and second pixels, substantially excluding the display region of the second pixel.

First claim

What is claimed is:

1. An organic light emitting display (OLED) device comprising:
first and second pixels on a substrate, each including a TFT region and a display region, the display region of each of the first and second pixels including a first electrode, an emission layer and a second electrode;
a color filter layer in the display region of the second pixel; and
a reflection preventing layer in the first and second pixels, substantially excluding the display region of the second pixel,
wherein the reflection preventing layer in the TFT region of the first pixel has a same thickness as that of the reflection preventing layer in the display region of the first pixel.

2. The OLED device according to claim 1 , wherein the first pixel is a white pixel, and the second pixel is any one of red, green and blue pixels.

3. The OLED device according to claim 1 , wherein the reflection preventing layer includes a first alignment layer on a first surface of the substrate, a quarter wave plate on the first alignment layer, a second alignment layer on the quarter wave plate, and a linear polarization layer on the second alignment layer.

4. The OLED device according to claim 3 , wherein the reflection preventing layer further includes a third alignment layer and a half wave plate between the substrate and the first alignment layer.

5. The OLED device according to claim 1 , wherein the display region of the second pixel is provided with at least any one of an alignment layer, a half wave plate, a quarter wave plate.

6. The OLED device according to claim 1 , further comprising a film on the substrate with an adhesive therebetween, and wherein the reflection preventing layer is provided on the film.

7. The OLED device according to claim 1 , wherein the reflection preventing layer is provided on a surface of the substrate where the first electrode, the emission layer and the second electrode are formed, and a lateral surface of the reflection preventing layer is sealed by a sealing layer.

8. The OLED device according to claim 1 , wherein the emission layer emits a white light.

9. The OLED device according to claim 1 , wherein the reflection preventing layer includes a phase retarder.

10. A method of manufacturing an organic light emitting display (OLED) device including first and second pixels on a substrate, each including a TFT region and a display region, the display region of each of the first and second pixels including a first electrode, an emission layer and a second electrode, the method comprising:
forming a color filter layer in the display region of the second pixel; and
forming a reflection preventing layer in the first and second pixels, substantially excluding the display region of the second pixel,
wherein the reflection preventing layer in the TFT region of the first pixel has a same thickness as that of the reflection preventing layer in the display region of the first pixel.

11. The method according to claim 10 , wherein the process of forming the reflection preventing layer includes:
forming a first alignment layer on the substrate;
forming a quarter wave plate on the first alignment layer;
forming a second alignment layer on the quarter wave plate; and
forming a linear polarization layer on the second alignment layer.

12. The method according to claim 11 , further comprising attaching a film on the substrate before forming the first alignment layer.

13. The method according to claim 12 , further comprising:
forming a third alignment layer on the substrate; and
forming a half wave plate on the third alignment layer.

14. The method according to claim 11 , wherein the reflection preventing layer is formed on the second electrode.

15. The method according to claim 14 , further comprising forming a sealing layer on the reflection preventing layer.

16. The method according to claim 15 , wherein the part of the reflection preventing layer is at least one of an alignment layer, a half wave plate, a quarter wave plate.

17. The method according to claim 11 , wherein the process of forming the linear polarization layer includes coating a mixture of reactive mesogen and dichromatic dye or a mixture of lyotropic liquid crystal and dichromatic dye onto the second alignment layer, curing the mixture for the TFT region for each pixel and the display region for the first pixel by irradiating UV onto the TFT region for each pixel and the display region for the first pixel, and removing the mixture from a display region for the second pixel which is not irradiated with UV.

18. The method according to claim 11 , wherein the reflection preventing layer is formed on a surface of the substrate opposite a surface where the first electrode, the emission layer and the second electrode are formed.

19. The method according to claim 10 , wherein a part of the reflection preventing layer is formed in the display region of the second pixel.

Assignees

• Lg Display Co Ltd

Inventors

• Park Wonki
• Park Hyejeong

Classifications

• H10K59/8793

  Arrangements for polarized light emission (H10K59/8791 takes precedence) · CPC title

• H10K59/8791 Primary

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/87

  Passivation; Containers; Encapsulations · CPC title

• H10K50/86

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• H10K59/351 Primary

  comprising more than three subpixels, e.g. red-green-blue-white [RGBW] · CPC title