Display device and method of manufacturing thereof

Patent metadata

Field	Value
Publication number	US-10096801-B2
Application number	US-201515107662-A
Country	US
Kind code	B2
Filing date	Dec 10, 2015
Priority date	Jun 29, 2015
Publication date	Oct 9, 2018
Grant date	Oct 9, 2018

Abstract

The present application discloses a display device having a metal pattern on a substrate of a display device and a light absorbing layer positioned to absorb light reflected by the metal pattern, and a manufacturing method thereof. The light absorbing layer has a pattern corresponding to at least a portion of the metal pattern.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate;
a metal pattern on the first substrate, the first substrate including multiple surfaces with a first main surface, the first main surface being closest of the multiple surfaces to the metal pattern;
a transparent electrode;
a switching transistor for driving image display and comprising a drain electrode;
a first light absorbing layer positioned to absorb light reflected by the metal pattern;
a first quarter wave plate; and
a first half wave plate;
wherein the transparent electrode is electrically connected to the drain electrode of the switching transistor;
the first light absorbing layer has a pattern corresponding to at least a portion of the metal pattern, an orthographic projection of the first light absorbing layer in plan view of the first substrate on the first main surface is at least partially non-overlapping with an orthographic projection of the transparent electrode in plan view of the first substrate on the first main surface; and
the first quarter wave plate and the first half wave plate are so positioned that light reflected by the metal pattern passes through the first quarter wave plate and the first half wave plate in a sequential order before it is absorbed by the first light absorbing layer, wherein the first substrate is a substrate proximal to a first light emitting surface of the display device for image display.

2. The display device of claim 1 , wherein the metal pattern, the first quarter wave plate, the first half wave plate, and the first light absorbing layer are sequentially arranged on the first substrate along a direction away from the first substrate.

3. The display device of claim 1 , wherein the first light absorbing layer, the first half wave plate, the first quarter wave plate, and the metal pattern are sequentially arranged on the first substrate along a direction away from the first substrate.

4. The display device of claim 1 , wherein the first light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, a total weight percentage of the polymer liquid crystal molecules in the mixture is in a range of 60% to 98%, the total weight percentage of the dichroic dye molecules in the mixture is in a range of 2% to 40%, or a weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in a range of 3:2 to 49:1.

5. The display device of claim 2 , wherein thickness of the first light absorbing layer is d, wherein d=kλ/σ, k is an integer, λ is wavelength of an incident light reflected by the metal pattern, and σ is refractive index of the first light absorbing layer.

6. The display device of claim 1 , further comprising:
a second substrate facing the first substrate;
a second light absorbing layer positioned to absorb light reflected by the metal pattern;
a second quarter wave plate; and
a second half wave plate;
wherein the second light absorbing layer has a pattern corresponding to at least a portion of the metal pattern; wherein the second quarter wave plate and the second half wave plate are so positioned that light reflected by the metal pattern passes through the second quarter wave plate and the second half wave plate in a sequential order before it is absorbed by the second light absorbing layer, wherein the second substrate is a substrate proximal to a second light emitting surface of the display device for image display.

7. The display device of claim 6 , wherein the first light absorbing layer, the first half wave plate, the first quarter wave plate, the metal pattern, the second quarter wave plate, the second half wave plate, the second light absorbing layer, and the second substrate are sequentially arranged on the first substrate along a direction away from the first substrate.

8. The display device of claim 1 , wherein the first light absorbing layer is a polarizer.

9. The display device of claim 1 , wherein the display device is an organic electroluminescence display device comprising an organic light emitting diode, the organic light emitting diode is connected to the switching transistor and comprises the transparent electrode.

10. The display device of claim 1 , wherein the metal pattern comprising one or a combination of a gate line metal pattern, a data line metal pattern, a source/drain electrode metal pattern, and a touch electrode metal pattern.

11. A method of manufacturing a display device, comprising:
forming a metal pattern on a first substrate, the first substrate including multiple surfaces with a first main surface, the first main surface being closest of the multiple surfaces to the metal pattern;
forming a switching transistor for driving image display and the switching transistor is formed to comprise a drain electrode;
forming a transparent electrode, the transparent electrode is formed to be electrically connected to the drain electrode of the switching transistor;
forming a light absorbing layer on the first substrate, wherein the light absorbing layer has a pattern corresponding to at least a portion of the metal pattern;
forming a quarter wave plate; and
forming a half wave plate;
wherein
the light absorbing layer is formed so that an orthographic projection of the light absorbing layer in plan view of the first substrate on the first main surface is at least partially non-overlapping with an orthographic projection of the transparent electrode in plan view of the first substrate on the first main surface; and
the quarter wave plate and the half wave plate are formed so that light reflected by the metal pattern passes through the quarter wave plate and the half wave plate in a sequential order before it is absorbed by the light absorbing layer, wherein the first substrate is a substrate proximal to a first light emitting surface of the display device for image display.

12. The method of claim 11 , wherein forming the light absorbing layer on the first substrate is performed prior to forming a metal pattern on the first substrate so that the metal pattern is formed on top of the light absorbing layer.

13. The method of claim 11 , wherein forming the light absorbing layer on the first substrate is performed subsequent to forming a metal pattern on the first substrate so that the light absorbing layer is formed on top of the metal pattern.

14. The method of claim 13 , wherein the quarter wave plate and the half wave plate are formed subsequent to forming the metal pattern and prior to forming the light absorbing layer on the first substrate; and
the quarter wave plate and the half wave plate are sequentially formed on top of the metal pattern.

15. The method of claim 11 , wherein the light absorbing layer comprises a mixture comprising polymer liquid crystal molecules and dichroic dye molecules, a total weight percentage of the polymer liquid crystal molecules in the mixture is in a range of 60% to 98%, the total weight percentage of the dichroic dye molecules in the mixture is in a range of 2% to 40%, or a weight ratio of the polymer liquid crystal molecules to the dichroic dye molecules in the mixture is in a range of 3:2 to 49:1.

16. The method of claim 15 , wherein thickness of the light absorbing layer is d, wherein d=kλ/σ, k is an integer, λ is a wavelength of the light reflected by the metal pattern and transmitted into the light absorbing layer, and σ is a refractive index of the light absorbing layer.

17. The method of claim 11 , wherein the display device is an organic electroluminescence display device, the method fu

Assignees

• Boe Technology Group Co Ltd

Inventors

• Tian Yunyun
• Choi Hyun Sic

Classifications

• G02F2001/133638

  Physics · mapped topic

• H01L27/3262

  Electricity · mapped topic

• G02F2413/02

  Number of plates being 2 · CPC title

• G02B5/3016

  involving passive liquid crystal elements (optical properties of liquid crystals G02F1/0063; polarising elements associated with active liquid crystal devices G02F1/133528) · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title