Display device and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10818652-B2
Application number	US-201715648881-A
Country	US
Kind code	B2
Filing date	Jul 13, 2017
Priority date	Jul 15, 2016
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

Abstract

A display device includes: a display substrate; an opposing substrate opposing the display substrate; and a light amount control layer disposed between the display substrate and the opposing substrate. The display substrate includes: a first substrate; a thin film transistor o disposed n the first substrate; and a pixel electrode connected to the thin film transistor. The opposing substrate includes: a second substrate; a color conversion layer disposed on the second substrate; and a first polarizer disposed on the color conversion layer. The first polarizer includes: a base substrate; and a linear polarizer disposed on one surface of the base substrate. The first polarizer opposes the pixel electrode. The one surface of the base substrate on which the linear polarizer is disposed has a flatness of about 60 nm or less.

First claim

What is claimed is:

1. A display device comprising:
a display substrate;
an opposing substrate opposing the display substrate; and
a light amount control layer disposed between the display substrate and the opposing substrate,
wherein the display substrate comprises:
a first substrate;
a thin film transistor disposed on the first substrate; and
a pixel electrode connected to the thin film transistor,

wherein the opposing substrate comprises:
a second substrate;
a color conversion layer disposed on the second substrate; and
a first polarizer disposed on the color conversion layer,

wherein the first polarizer comprises:
a base substrate; and
a linear polarizer disposed on one surface of the base substrate,

wherein the first polarizer opposes the pixel electrode,
wherein a first edge of the color conversion layer overlaps the linear polarizer, and
wherein a second edge of the color conversion layer does not overlap the linear polarizer.

2. The display device as claimed in claim 1 , wherein the thickness of the base substrate is in a range from about 0.8 μm to 35 μm, and wherein the one surface of the base substrate on which the linear polarizer is disposed has a flatness of about 60 nm or less.

3. The display device as claimed in claim 1 , wherein the base substrate is a plastic substrate.

4. The display device as claimed in claim 1 , further comprising a dichroic reflection layer disposed between the color conversion layer and the base substrate.

5. The display device as claimed in claim 1 , further comprising an adhesion layer disposed between the second substrate and the color conversion layer.

6. The display device as claimed in claim 1 , further comprising an adhesion layer disposed between the color conversion layer and the first polarizer.

7. The display device as claimed in claim 1 , wherein the linear polarizer is a wire grid polarizer (WGP).

8. The display device as claimed in claim 1 , wherein the linear polarizer comprises polyvinyl alcohol (PVA).

9. The display device as claimed in claim 1 , wherein the color conversion layer comprises a fluorescent element.

10. The display device as claimed in claim 1 , wherein the color conversion layer comprises quantum dots.

11. The display device as claimed in claim 1 , wherein the color conversion layer comprises:
a red color conversion portion comprising a red fluorescent element; and
a green color conversion portion comprising a green fluorescent element.

12. The display device as claimed in claim 11 , further comprising a yellow color filter on the red color conversion portion and the green color conversion portion.

13. The display device as claimed in claim 1 , further comprising a passivation layer disposed between the base substrate and the linear polarizer.

14. The display device as claimed in claim 1 , further comprising a second polarizer disposed on the display substrate.

15. The display device as claimed in claim 1 , wherein the light amount control layer is a liquid crystal layer.

16. The display device as claimed in claim 1 , wherein the opposing substrate further comprises a light blocking layer.

17. The display device as claimed in claim 16 , wherein the light blocking layer is disposed between the base substrate and the second substrate.

18. The display device as claimed in claim 16 , wherein the light blocking layer is disposed between the base substrate and the light amount control layer.

19. A method of manufacturing a display device, the method comprising:
forming a display substrate;
forming a first polarizer; and
disposing the first polarizer and the display substrate to oppose each other,
wherein the forming a display substrate comprises:
forming a thin film transistor on a first substrate; and
forming a pixel electrode on the first substrate, the pixel electrode connected to the thin film transistor,
wherein the forming a first polarizer comprises:
forming a base substrate on a carrier substrate; and
forming a first linear polarizer on the base substrate, and
disposing a color conversion layer on the first polarizer,
wherein the disposing the first polarizer and the display substrate to oppose each other includes removing the carrier substrate from the base substrate,
wherein a first edge of the color conversion layer overlaps one of the first linear polarizer, and
wherein a second edge of the color conversion layer does not overlap the first linear polarizer.

20. The method as claimed in claim 19 , wherein the base substrate is a plastic substrate.

21. The method as claimed in claim 19 , wherein the removing the carrier substrate from the base substrate includes detaching the carrier substrate from the base substrate, and wherein the base substrate has a thickness in a range from about 0.8 μm to about 50 μm.

22. The method as claimed in claim 19 ,
wherein the disposing the color conversion layer on the first polarizer is accomplished before disposing the first polarizer and the display substrate to oppose each other.

23. The method as claimed in claim 19 , wherein the disposing the color conversion layer on the first polarizer is accomplished after removing the carrier substrate.

24. The method as claimed in claim 19 , wherein the removing the carrier substrate from the base substrate is performed after the first linear polarizer has been positioned between the carrier substrate and a light blocking layer.

25. The method as claimed in claim 19 , wherein a thickness of the carrier substrate is greater than a thickness of the base substrate.

26. A method of manufacturing a display device, the method comprising:
forming a display substrate;
forming a first polarizer on a carrier substrate;
forming a color conversion layer on the first polarizer;
disposing a second substrate on the color conversion layer;
removing the carrier substrate from the first polarizer;
forming a common electrode on the first polarizer to form an opposing substrate; and
disposing the opposing substrate to oppose the display substrate,
wherein the forming a first polarizer comprises:
forming a base substrate on the carrier substrate; and
forming a linear polarizer on the base substrate,
wherein a first edge of the color conversion layer overlaps the linear polarizer, and
wherein a second edge of the color conversion layer does not overlap the linear polarizer.

27. The method as claimed in claim 26 , wherein the base substrate is a plastic substrate.

28. The method as claimed in claim 26 , wherein the removing the carrier substrate from the first polarizer includes detaching the carrier substrate from the first polarizer, and wherein the base substrate has a thickness in a range from about 0.8 μm to about 50 μm.

29. The method as claimed in claim 26 , wherein the forming a display substrate comprises:
disposing a thin film transistor on a first substrate; and
forming a pixel electrode on the first substrate, the pixel electrode connected to the thin film transistor.

30. The method as claimed in claim 26 , further comprising:
disposing a dichroic reflection layer on the first polarizer before forming the color conversion layer on the first polarizer.

31. The method as claimed in claim 30 , further comprising:
forming a first passivation layer on the first polarizer before

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Yongseok
• Lee Daeho
• Lee Junhan
• Kim Youngmin
• Park Haeil

Classifications

• H10D86/85

  characterised by only passive components · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• H10F39/8053

  Colour filters · CPC title

• G02F1/133617

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• G02F2413/02

  Number of plates being 2 · CPC title