Polarizer, display panel and display device

Patent metadata

Field	Value
Publication number	US-2021215971-A1
Application number	US-201916959258-A
Country	US
Kind code	A1
Filing date	Aug 29, 2019
Priority date	Aug 29, 2019
Publication date	Jul 15, 2021
Grant date	—

Abstract

A polarizer includes a first protection layer, a polarizing layer and a second protection layer that are sequentially stacked; and at least one diffusion layer. One diffusion layer is disposed on a side of at least one of the first protection layer and the second protection layer facing away from the polarizing layer, and the diffusion layer is configured to diffuse at least a part of light passing through the diffusion layer.

First claim

1 . A polarizer, comprising:
a first protection layer, a polarizing layer and a second protection layer that are sequentially stacked; and at least one diffusion layer, wherein one diffusion layer is disposed on a side of at least one of the first protection layer and the second protection layer facing away from the polarizing layer, and the diffusion layer is configured to diffuse at least a part of light passing through the diffusion layer.

2 . The polarizer according to claim 1 , wherein the diffusion layer is a first pressure-sensitive adhesive layer doped with a plurality of particles, and the plurality of particles are configured to diffuse light incident on the plurality of particles.

3 . The polarizer according to claim 1 , wherein the diffusion layer includes:
a hardening layer, and a plurality of microstructures disposed on a side of the hardening layer facing away from the polarizing layer, wherein the plurality of microstructures is configured to diffuse light incident on the plurality of microstructures.

4 . The polarizer according to claim 3 , wherein the plurality of microstructures include a plurality of particles; or, the hardening layer includes a polyethylene terephthalate layer.

5 . The polarizer according to claim 2 , wherein the plurality of particles include at least one of silica particles, polystyrene resin particles, polymethyl methacrylate particles, or polycarbonate particles.

6 . The polarizer according to claim 2 , wherein the plurality of particles include at least one of spherical particles, cylindrical particles, or pyramid-shaped particles.

7 . The polarizer according to claim 3 , wherein the plurality of microstructures include a plurality of microgrooves.

8 . The polarizer according to claim 7 , wherein the plurality of microgrooves include at least one of hemispherical microgrooves, cylindrical microgrooves, or pyramid-shaped microgrooves.

9 . The polarizer according to claim 3 , further comprising a second pressure-sensitive adhesive layer; wherein
the second pressure-sensitive adhesive layer is disposed on a side of the diffusion layer facing away from the polarizing layer; or a diffusion layer is disposed on a side of one of the first protection layer and the second protection layer facing away from the polarizing layer, and the second pressure-sensitive adhesive layer is disposed at a side of the other protection layer without a diffusion layer facing away from the polarizing layer.

10 . The polarizer according to claim 1 , wherein a haze of the polarizer ranges from 5% to 100%.

11 . The polarizer according to claim 10 , wherein the haze of the polarizer ranges from 20% to 60%.

12 . The polarizer according to claim 1 , wherein
the first protection layer includes at least one of a triacetyl cellulose layer, a polymethyl methacrylate layer, a cycloolefin polymer layer, or a polyethylene terephthalate layer; the second protection layer includes at least one of a triacetyl cellulose layer, a polymethyl methacrylate layer, a cycloolefin polymer layer, or a polyethylene terephthalate layer; and the polarizing layer includes a polyvinyl alcohol layer.

13 . A display module, comprising: a dimming panel, a first polarizer, a liquid crystal display panel and a second polarizer that are sequentially stacked; wherein at least one of the first polarizer and the second polarizer is the polarizer according to claim 1 .

14 . The display module according to claim 13 , further comprising: a jointing adhesive layer; wherein
the first polarizer is bonded to the dimming panel through the jointing adhesive layer; or the first polarizer is bonded to the liquid crystal display panel through the jointing adhesive layer.

15 . The display module according to claim 13 , wherein
the liquid crystal display panel includes a plurality of sub-pixels; the dimming panel includes a first substrate and a second substrate opposite to each other, and a first liquid crystal layer disposed between the first substrate and the second substrate; and the dimming panel has a plurality of dimming regions, and one of the plurality of dimming regions corresponds to at least one sub-pixel.

16 . The display module according to claim 13 , further comprising: a third polarizer disposed on a side of the dimming panel facing away from the liquid crystal display panel.

17 . A display device, comprising:
the display module according to claim 13 , and a backlight module disposed at a side of the dimming panel in the display module facing away from the liquid crystal display panel.

18 . The polarizer according to claim 4 , wherein the plurality of particles include at least one of silica particles, polystyrene resin particles, polymethyl methacrylate particles, or polycarbonate particles.

19 . The polarizer according to claim 4 , wherein the plurality of particles include at least one of spherical particles, cylindrical particles, or pyramid-shaped particles.

Assignees

• Hefei Xinsheng Optoelectronics Technology Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Liao Yanping
• Liu Jiaqing
• Han Lihui
• Liu Jingang
• Dai Ke
• Guo Lei

Classifications

• G02B5/305

  including organic materials, e.g. polymeric layers · CPC title

• G02F1/133601

  for spatial active dimming · CPC title

• G02F1/13471 Primary

  in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence) · CPC title

• G02F1/136286

  Wiring, e.g. gate line, drain line · CPC title

• G02F2201/50

  Protective arrangements · CPC title