Polarizer and display device

Patent metadata

Field	Value
Publication number	US-12443075-B2
Application number	US-202217755146-A
Country	US
Kind code	B2
Filing date	Mar 15, 2022
Priority date	Mar 7, 2022
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A polarizer and a display device are provided. In the polarizer, on a basis of using an optical compensation layer to compensate a birefringence of liquid crystal molecules in a liquid crystal layer, a liquid crystal compensation layer is configured to compensate the birefringence of the liquid crystal molecules in the liquid crystal layer. The liquid crystal compensation layer adjusts a compensation value through a refractive index difference and a thickness of the liquid crystal molecules, so an adjustment range is large and a restriction is small, which can be matched with a high phase difference of the display device, and further improves side-view light leakage in a dark state of the liquid crystal display.

First claim

What is claimed is:

1. A polarizer, comprising:
a first polarizing layer;
a liquid crystal compensation layer;
an optical compensation layer, wherein the first polarizing layer, the optical compensation layer, and the liquid crystal compensation layer are stacked in sequence, and both the optical compensation layer and the liquid crystal compensation layer are arranged on one side of the first polarizing layer; and
a first support layer disposed on a side of the liquid crystal compensation layer away from the first polarizing layer, wherein the liquid crystal compensation layer is disposed between the optical compensation layer and the first support layer.

2. The polarizer according to claim 1 , wherein the liquid crystal compensation layer comprises a liquid crystal polymer.

3. The polarizer according to claim 2 , wherein a difference in birefringence of liquid crystal molecules in the liquid crystal polymer ranges from 0.05 to 0.15.

4. The polarizer according to claim 2 , wherein a thickness of the liquid crystal polymer ranges from 0.01 micrometers to 6 micrometers.

5. The polarizer according to claim 1 , wherein the polarizer further comprises a first protection layer, and the first protection layer is disposed on a side of the first polarizing layer away from the liquid crystal compensation layer.

6. The polarizer according to claim 1 , wherein the optical compensation layer comprises a single optical axis compensation film or a dual optical axis compensation film.

7. The polarizer according to claim 6 , wherein the single optical axis compensation film is an anisotropic birefringent film with only one optical axis,
wherein the dual optical axis compensation film has two optical axes and three refractive indices, and
wherein the dual optical axis compensation film has an in-plane retardation value and an out-of-plane retardation value in a thickness direction.

8. A display device, comprising:
a first polarizer;
a second polarizer opposite to the first polarizer; and
a liquid crystal display panel disposed between the first polarizer and the second polarizer, wherein the first polarizer comprises:
a first polarizing layer;
a liquid crystal compensation layer;
an optical compensation layer, wherein the first polarizing layer, the optical compensation layer, and the liquid crystal compensation layer are stacked in sequence, and both the optical compensation layer and the liquid crystal compensation layer are arranged on one side of the first polarizing layer; and
a first support layer disposed on a side of the liquid crystal compensation layer away from the first polarizing layer, wherein the liquid crystal compensation layer is disposed between the optical compensation layer and the first support layer;
wherein the liquid crystal compensation layer and the optical compensation layer are disposed between the first polarizing layer and the liquid crystal display panel.

9. The display device according to claim 8 , wherein the liquid crystal compensation layer comprises a liquid crystal polymer.

10. The display device according to claim 9 , wherein a difference in birefringence of liquid crystal molecules in the liquid crystal polymer ranges from 0.05 to 0.15.

11. The display device according to claim 9 , wherein a thickness of the liquid crystal polymer ranges from 0.01 micrometers to 6 micrometers.

12. The display device according to claim 8 , wherein the polarizer further comprises a first protection layer, and the first protection layer is disposed on a side of the first polarizing layer away from the liquid crystal compensation layer.

13. The display device according to claim 8 , wherein the optical compensation layer comprises a single optical axis compensation film or a dual optical axis compensation film.

14. The display device according to claim 13 , wherein the single optical axis compensation film is an anisotropic birefringent film with only one optical axis,
wherein the dual optical axis compensation film has two optical axes and three refractive indices, and
wherein the dual optical axis compensation film has an in-plane retardation value and an out-of-plane retardation value in a thickness direction.

15. The display device according to claim 8 , wherein the second polarizer comprises a second polarizing layer.

16. The display device according to claim 15 , wherein the second polarizer further comprises a second support layer, and the second support layer is disposed between the second polarizing layer and the liquid crystal display panel.

17. The polarizer according to claim 1 , wherein the first support layer is a cellulose triacetate film.

18. The display device according to claim 8 , wherein the first support layer is a cellulose triacetate film.

19. The display device according to claim 8 , wherein the second polarizer comprises a second polarizing layer and a second support layer, and the second support layer is disposed between the second polarizing layer and the liquid crystal display panel, wherein the second support layer is a cellulose triacetate film.

20. The display device according to claim 8 , wherein the first polarizer is an upper polarizer, and the second polarizer is a lower polarizer.

Assignees

• Tcl China Star Optoelectronics Tech Co Ltd

Inventors

• Hai Bo

Classifications

• G02F1/133528

  Polarisers · CPC title

• G02B5/305

  including organic materials, e.g. polymeric layers · 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

• G02F1/1335

  Structural association of cells with optical devices, e.g. polarisers or reflectors · CPC title

• G02B5/30

  Polarising elements (light-modulating devices with active elements G02F1/00) · CPC title