Display device and method of manufacturing the same

• US 9,419,251 B2
• Filed: 04/24/2014
• Issued: 08/16/2016
• Est. Priority Date: 01/28/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Tian, Yunyun, Sic, Choi Hyun, Wang, Qiangtao
• Primary Examiner(s): MENZ, LAURA MARY
• Application Number:
  US14/435,966
• Publication Number:
  US 20160028046A1
• Time in Patent Office: 845 Days
• US Class Current: 1/1
• CPC Class Codes: H10K 2102/3026 Top emission
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 50/86 Arrangements for improving contrast, e.g. preventing reflection of ambient light
• CPC Class Codes: H10K 50/865 comprising light absorbing layers, e.g. light-blocking layers
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass

Abstract

The present invention discloses a display device and a method of manufacturing the display device to solve a problem in the prior art that the light transmittance of the displaying light in the display device is very low. In the present invention, the display device comprises a first substrate formed with at least one metal pattern thereon, a second substrate disposed opposite to the first substrate, and a polarizer provided on an outer side of the second substrate far away from the first substrate. An area of an overlapping region between the metal pattern and a pixel display zone is less than an area of the pixel display zone. The polarizer comprises a light absorption layer fully covering the at least one metal pattern. An area of an overlapping region between the light absorption layer of the polarizer and the pixel display zone is less than the area of the pixel display zone. In the present invention, it increases the light transmittance of the displaying light in the OLED display device.

Claims

1. A display device, comprising:

a first substrate formed with at least one metal pattern thereon;

a second substrate disposed opposite to the first substrate; and

a polarizer provided on an outer side of the second substrate distant from the first substrate,

wherein an area of an overlapping region between the metal pattern and a pixel display zone is less than an area of the pixel display zone,

wherein the polarizer comprises a light absorption layer fully covering the at least one metal pattern, and

wherein an area of an overlapping region between the light absorption layer of the polarizer and the pixel display zone is less than the area of the pixel display zone.

2. The display device according to claim 1, wherein the display device comprises a wave plate disposed on the outer side or an inner side of the second substrate and located below the polarizer.

3. The display device according to claim 2,

wherein the wave plate fully covers the at least one metal pattern, and the polarizer fully covers the wave plate;

and

wherein an area of an overlapping region between the wave plate and the pixel display zone is less than the area of the pixel display zone.

4. The display device according to claim 3, wherein the wave plate is disposed on the inner side of the second substrate, and the display device further comprises a planarization layer for packaging the wave plate.

5. The display device according to claim 3, wherein the wave plate comprises a half-wavelength (λ

/2) wave plate and a quarter-wavelength (λ

/4) wave plate.

6. The display device according to claim 1, wherein the light absorption layer is made of polyvinyl alcohol.

7. The display device according to claim 6, wherein the polarizer further comprises a cellulose triacetate layer which is completely coincided with the light absorption layer.

8. The display device according to claim 1, wherein the metal pattern comprises at least one of gate lines, data lines, gate electrodes, source electrodes and drain electrodes.

9. The display device according to claim 1, wherein the display device has a pixel size less than a preset size threshold, and the light absorption layer is not overlapped with the pixel display zone.

10. The display device according to claim 9, wherein the display device comprises an Organic Light-Emitting Diode (OLED) display device.

11. The display device according to claim 1, wherein the metal pattern is not overlapped with the pixel display zone, is partly overlapped with the pixel display zone, or is completely overlapped with the pixel display zone.

12. The display device according to claim 11, wherein the metal pattern is completely overlapped with the pixel display zone, and an area of the metal pattern is less than the area of the pixel display zone.

13. The display device according to claim 1, wherein the light absorption layer of the polarizer is not overlapped with the pixel display zone, is partly overlapped with the pixel display zone, or is completely overlapped with the pixel display zone.

14. The display device according to claim 13, wherein the light absorption layer of the polarizer is completely overlapped with the pixel display zone, and an area of the light absorption layer of the polarizer is less than the area of the pixel display zone.

15. A method of manufacturing a display device, comprising steps of:

forming at least one metal pattern on a first substrate, wherein an area of an overlapping region between the metal pattern and a pixel display zone is less than an area of the pixel display zone;

forming a polarizer on an outer side of a second substrate distant from the first substrate, wherein the polarizer comprises a light absorption layer; and

assembling the first substrate and the second substrate together, so that the light absorption layer fully covers the at least one metal pattern, wherein an area of an overlapping region between the light absorption layer and the pixel display zone is less than the area of the pixel display zone.

16. The method according to claim 15, further comprising:

forming a wave plate on an inner side of the second substrate, so that the wave plate fully covers the at least one metal pattern, and the polarizer fully covers the wave plate, after the first substrate and the second substrate are assembled together,

wherein an area of an overlapping region between the wave plate and the pixel display zone is less than the area of the pixel display zone.

17. The method according to claim 16, further comprising:

forming a planarization layer for packaging the wave plate after forming the wave plate.

18. The method according to claim 17, wherein the wave plate comprises a half-wavelength (λ

/2) wave plate and a quarter-wavelength (λ

/4) wave plate.

19. The method according to claim 15, wherein the metal pattern comprises at least one of gate lines, data lines, gate electrodes, source electrodes and drain electrodes.

20. The method according to claim 15, wherein the display device comprises an Organic Light-Emitting Diode (OLED) display device.