Flexible liquid crystal optical shutter and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-2020124900-A1
Application number	US-201816605531-A
Country	US
Kind code	A1
Filing date	Oct 10, 2018
Priority date	Apr 11, 2018
Publication date	Apr 23, 2020
Grant date	—

Abstract

A flexible liquid crystal optical shutter and a manufacturing method thereof are disclosed. A box body filled with a liquid crystal mixture is irradiated with ultraviolet light to form supporting column structures, which increases the bending resistance of the flexible liquid crystal optical shutter, and may improve the mechanical stability of the liquid crystal optical shutter while maintaining the haze of the flexible liquid crystal optical shutter. The manufacturing method is simple. After the manufactured flexible liquid crystal optical shutter is connected to a power supply, the brightness of the liquid crystal optical shutter may be adjusted by changing the magnitude of voltage applied, so that the liquid crystal optical shutter may replace curtains to some extent, solves some limitations of coated glass, and has a good application prospect in vehicle-mounted household glass windows and the like.

First claim

1 . A method for manufacturing a flexible liquid crystal optical shutter, comprising the following steps:
S1, one of taking and manufacturing a box body comprising an upper substrate and a lower substrate, which are arranged oppositely, where the upper substrate comprises a first transparent flexible substrate, a first conductive layer and a first vertical alignment layer, which are sequentially stacked arranged; where the lower substrate comprises a second transparent flexible substrate, a second conductive layer and a second vertical alignment layer, which are sequentially stacked arranged; an adjustment region is formed between the upper substrate and the lower substrate, and the first vertical alignment layer and the second vertical alignment layer faces the adjustment region; S2, filling the adjustment region with a liquid crystal mixture, where the liquid crystal mixture comprises:
a photopolymerizable liquid crystal monomer;
a photoinitiator; and
a negative liquid crystal;
S3, placing a mask with a transparent portion and an opaque portion above the box body, and irradiating the mask with ultraviolet light to polymerize the liquid crystal mixture corresponding to the position of transparent portion to form supporting structures; and S4, removing the mask, and irradiating the box body with an intensity of the ultraviolet light of 25-35 mW/cm 2 .

2 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the intensity of the ultraviolet light in step S3 is 80-100 mW/cm 2 .

3 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the irradiation time of the ultraviolet light in step S3 is 4-6 min.

4 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the irradiation time of the ultraviolet light in step S4 is 8-12 min.

5 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the liquid crystal mixture comprises 8-12 parts by mass of polymerizable liquid crystal monomer, 0.5-1.5 parts by mass of photoinitiator, and 84.5-91 parts by mass of negative liquid crystal.

6 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the liquid crystal mixture further comprises a dichroic dye.

7 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the polymerizable liquid crystal monomer is HCM009.

8 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the photoinitiator is IR651.

9 . The method for manufacturing the flexible liquid crystal optical shutter of claim 1 , wherein the first conductive layer or the second conductive layer is one of an ITO layer or a silver nanowire transparent electrode layer.

10 . A flexible liquid crystal optical shutter manufactured by the method for manufacturing the flexible liquid crystal optical shutter of claim 1 .

Assignees

• Univ South China Normal
• Shenzhen Guohua Optoelectronics Co Ltd
• Acad Shenzhen Guohua Optoelectronics

Inventors

• Zhou Guofu
• Yuan Dong
• Hu Xiaowen
• Yan Xudong
• Zhao Wei
• Jin Mingliang

Classifications

• G02F2202/043

  pleochroic · CPC title

• G03F7/0007

  Filters, e.g. additive colour filters; Components for display devices · CPC title

• G02F1/1337

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G03F7/2004

  characterised by the use of a particular light source, e.g. fluorescent lamps or deep UV light · CPC title

• G02F1/1341

  Filling or closing of cells · CPC title