Polarizing plate and liquid crystal display panel

Patent metadata

Field	Value
Publication number	US-2016334669-A1
Application number	US-201514779014-A
Country	US
Kind code	A1
Filing date	Aug 10, 2015
Priority date	May 14, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

A polarizing plate is disclosed, and has a polarizing layer, supporting layers, a surface protective layer, a peeling protective layer and an adhesive layer. The polarizing layer is configured to emit an incident light after performing a polarizing process. The supporting layers are used to protect the polarizing layer. The surface protective layer is configured to isolate an upper surface of the polarizing layer from the external environment. The peeling protective layer is configured to isolate a lower surface of the polarizing layer from the external environment. The adhesive layer is configured to adhere the polarizing plate to an array substrate or a color filter substrate.

First claim

1 . A polarizing plate, comprising:
a polarizing layer configured to emit an incident light after performing a polarizing process; a pair of supporting layers respectively disposed on an upper side and a lower side of the polarizing layer to protect the polarizing layer; a surface protective layer configured to isolate an upper surface of the polarizing layer from the external environment and connected with the supporting layer located on the upper side of the polarizing layer; a peeling protective layer configured to isolate a lower surface of the polarizing layer from the external environment and connected with the supporting layer located on the lower side of the polarizing layer by an adhesive layer; and the adhesive layer configured to adhere the polarizing plate to an array substrate or a color filter substrate; wherein the adhesive layer is a conductive adhesive layer with a conductive material; wherein a material of the conductive adhesive layer includes a resin matrix, a conductive filler, a curing agent and an additive; wherein the resin matrix includes at least one of epoxy resin, epoxy-phenolic resin, silicone resin, polyurethane, polyacrylate, acrylate copolymer, and polystyrene sulfonate-doped polyethylene dioxythiophene; and wherein the conductive filler is graphene, carbon nanotube or silver nanowire.

2 . A polarizing plate, comprising:
a polarizing layer configured to emit an incident light after performing a polarizing process; a pair of supporting layers respectively disposed on an upper side and a lower side of the polarizing layer to protect the polarizing layer; a surface protective layer configured to isolate an upper surface of the polarizing layer from the external environment and connected with the supporting layer located on the upper side of the polarizing layer; a peeling protective layer configured to isolate a lower surface of the polarizing layer from external environment and connected with the supporting layer located on the lower side of the polarizing layer by an adhesive layer; and the adhesive layer configured to adhere the polarizing plate to an array substrate or a color filter substrate; wherein the adhesive layer is a conductive adhesive layer with a conductive material.

3 . The polarizing plate according to claim 2 , wherein a material of the conductive adhesive layer includes a resin matrix, a conductive filler, a curing agent and an additive.

4 . The polarizing plate according to claim 3 , wherein the resin matrix includes at least one of epoxy resin, epoxy-phenolic resin, silicone resin, polyurethane, polyacrylate, acrylate copolymer, and polystyrene sulfonate-doped polyethylene dioxythiophene.

5 . The polarizing plate according to claim 4 , wherein a ratio of the resin matrix in the conductive adhesive layer is 50% to 80%.

6 . The polarizing plate according to claim 3 , wherein the conductive filler is graphene, carbon nanotube or silver nanowire.

7 . The polarizing plate according to claim 6 , wherein a ratio of the conductive filler in the conductive adhesive layer is 5% to 30%.

8 . The polarizing plate according to claim 3 , wherein the curing agent is trimethylamine, ethylene diamine, N,N-dimethylaniline or isocyanate compound; and the additive is silane coupling agent, levelling agent, froth preventing agent or diluent.

9 . The polarizing plate according to claim 3 , wherein the adhesive layer is formed by the following steps of:
mixing the resin matrix with a conductive-filler dispersion solution according to a predetermined ratio; adding the curing agent into the mixed conductive-filler dispersion solution; adding the additive into the conductive-filler dispersion solution after adding the curing agent, so as to obtain a coating sample with a predetermined viscosity; coating the coating sample onto the peeling protective layer; drying the peeling protective layer coated with the coating sample; and adhering the peeling protective layer after the drying process to the support layer located on the lower side of the polarizing layer and curing to obtain the polarizing plate.

10 . The polarizing plate according to claim 9 , wherein the predetermined viscosity is 700 mPa·s to 900 mPa·s.

11 . A liquid crystal display panel, comprising: an array substrate, a color filter substrate, a liquid crystal layer and a pair of polarizing plates respectively disposed on the array substrate and the color filter substrate:
wherein each of the polarizing plates includes: a polarizing layer configured to emit an incident light after performing a polarizing process; a pair of supporting layers respectively disposed on an upper side and a lower side of the polarizing layer to protect the polarizing layer; a surface protective layer configured to isolate an upper surface of the polarizing layer from the external environment and connected with the supporting layer located on the upper side of the polarizing layer; a peeling protective layer configured to isolate a lower surface of the polarizing layer from the external environment and connected with the supporting layer located on the lower side of the polarizing layer by an adhesive layer; and the adhesive layer configured to adhere the polarizing plate to the array substrate or the color filter substrate; wherein the adhesive layer is a conductive adhesive layer with a conductive material.

12 . The liquid crystal display panel according to claim 11 , wherein a material of the conductive adhesive layer includes a resin matrix, a conductive filler, a curing agent and an additive.

13 . The liquid crystal display panel according to claim 12 , wherein the resin matrix includes at least one of epoxy resin, epoxy-phenolic resin, silicone resin, polyurethane, polyacrylate, acrylate copolymer, and polystyrene sulfonate-doped polyethylene dioxythiophene.

14 . The liquid crystal display panel according to claim 13 , wherein a ratio of the resin matrix in the conductive adhesive layer is 50% to 80%.

15 . The liquid crystal display panel according to claim 12 , wherein the conductive filler is graphene, carbon nanotube or silver nanowire.

16 . The liquid crystal display panel according to claim 15 , wherein a ratio of the conductive filler in the conductive adhesive layer is 5% to 30%.

17 . The liquid crystal display panel according to claim 12 , wherein the curing agent is trimethylamine, ethylene diamine, N,N-dimethylaniline or isocyanate compound; and the additive is silane coupling agent, levelling agent, froth preventing agent or diluent.

18 . The liquid crystal display panel according to claim 12 , wherein the adhesive layer is formed by the following steps of:
mixing the resin matrix with a conductive-filler dispersion solution according to a predetermined ratio; adding the curing agent into the mixed conductive-filler dispersion solution; adding the additive into the conductive-filler dispersion solution after adding the curing agent, so as to obtain a coating sample with a predetermined viscosity; coating the coating sample onto the peeling protective layer; drying the peeling protective layer coated with the coating sample; and adhering the peeling protective layer after the drying process to the support layer located on the lower side of the polarizing layer and curing to obtain the polarizing plate.

19 . The liquid crystal display panel according to claim 18 , wherein the predetermined viscosity is 700 mPa·s to 900 mPa·s.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Li Ji
• Chen Hsiaohsien

Classifications

• G02F2201/50

  Protective arrangements · CPC title

• G02F1/133528 Primary

  Polarisers · CPC title

• H05F3/00

  Carrying-off electrostatic charges ({from shoes A43B7/36}; from living beings A61N1/14; {from tyres B60C19/08; from vehicles B60R16/06; from aircraft B64D45/02; from large containers B65D90/46}) · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F2202/28

  Adhesive materials or arrangements · CPC title