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Hyperbranched-monomer-based a fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve and preparation method thereof

A technology of hyperbranched monomers and cholesteric liquid crystals, applied in chemical instruments and methods, liquid crystal materials, optics, etc., can solve problems such as uneven distribution of liquid crystal domain size distribution, scattering, affecting imaging effects, and blurred images. Achieve the effect of weakening the grainy phenomenon and reducing the response time

Inactive Publication Date: 2019-05-31
LIGHTIN INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The display body of the 3D volumetric display system is composed of multi-layer liquid crystal light valves. The liquid crystal light valves are quickly switched between the scattering state and the transparent state through circuit driving. The refresh rate of the light valves must reach at least 48Hz to make the obtained picture stable. No flicker; in addition, because the image needs to pass through the multi-layer liquid crystal light valve, the light loss is very serious, and the reduced brightness will cause the image to be blurred and unclear; therefore, the 3D volume display system needs a light valve with high transmittance and fast response
On the other hand, since the release of Googleglass and Microsoft Hololens, augmented reality (AR) has become a popular display direction. The existing PSCT liquid crystal light valve has uneven distribution of scattering due to the uneven distribution of liquid crystal domain sizes. Due to the special optical path of AR display And the limitation of small size, it is necessary to enlarge the imaging on the PSCT liquid crystal light valve (it will be enlarged by 4 to 10 times), which leads to defects in the imaging process and seriously affects the imaging effect

Method used

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  • Hyperbranched-monomer-based a fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve and preparation method thereof
  • Hyperbranched-monomer-based a fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve and preparation method thereof
  • Hyperbranched-monomer-based a fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve and preparation method thereof

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Experimental program
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Effect test

Embodiment 1～3

[0043] The preparation method of the fast response polymer stabilized cholesteric phase (PSCT) liquid crystal light valve based on the hyperbranched monomer comprises:

[0044] (1) ETERCURE 6361-100 (manufactured by Changxing Special Materials Co., Ltd., product name: ETERCURE 6361-100) with eight functional group hyperbranched monomers was dispersed with dichloromethane at a mass ratio of 1:2000, sealed, and magnetically stirred to obtain homogeneous dispersion;

[0045](2) Disperse the liquid crystal monomer 4-(3-acryloyloxypropoxy)benzoic acid 2-methyl-1,4-phenyl ester (RM257) with dichloromethane at a mass ratio of 1:1000 and seal it, Use magnetic stirring to obtain a uniform dispersion;

[0046] (3) High twisting force constant (HTP) chiral agent S5011 ((13BR)-5,6-dihydro-5-(trans-4-propylcyclohexyl)-4H-dinaphtho[2,1 -F: 1′,2′-H][1,5]dioxacyclononetetraene) was dispersed with dichloromethane at a mass ratio of 1:1000, sealed, and magnetically stirred to obtain a homogen...

Embodiment 4～6

[0059] The preparation method of the fast response polymer stabilized cholesteric phase (PSCT) liquid crystal light valve based on the hyperbranched monomer comprises:

[0060] (1) Disperse the eight-functional group hyperbranched monomer (ETERCURE 6361-100) with dichloromethane at a mass ratio of 1:2000, seal it, and use magnetic stirring to obtain a uniform dispersion;

[0061] (2) Disperse the liquid crystal monomer 4-(3-acryloyloxypropoxy)benzoic acid 2-methyl-1,4-phenyl ester (RM257) with dichloromethane at a mass ratio of 1:1000 and seal it, Use magnetic stirring to obtain a uniform dispersion;

[0062] (3) Disperse the high twisting force constant (HTP) chiral agent (S5011) with dichloromethane at a mass ratio of 1:1000, seal it, and use magnetic stirring to obtain a uniform dispersion;

[0063] (4) Add the hyperbranched monomer dispersion, liquid crystal monomer dispersion, and chiral agent dispersion to the nematic liquid crystal (E7) to obtain a liquid crystal mixtu...

Embodiment 7

[0076] The preparation method of the fast response polymer stabilized cholesteric phase (PSCT) liquid crystal light valve based on the hyperbranched monomer comprises:

[0077] (1) After dispersing the hyperbranched monomer pentaerythritol triacrylate (PETA) with dichloromethane in a mass ratio of 1:2000, seal it, and use magnetic stirring to obtain a uniform dispersion;

[0078] (2) Disperse the liquid crystal monomer 4-(3-acryloyloxypropoxy)benzoic acid 2-methyl-1,4-phenyl ester (RM257) with dichloromethane at a mass ratio of 1:1000 and seal it, Use magnetic stirring to obtain a uniform dispersion;

[0079] (3) Disperse the high twisting force constant (HTP) chiral agent (S5011) with dichloromethane at a mass ratio of 1:1000, seal it, and use magnetic stirring to obtain a uniform dispersion;

[0080] (4) Add the hyperbranched monomer dispersion, liquid crystal monomer dispersion, and chiral agent dispersion to the nematic liquid crystal (E7) to obtain a liquid crystal mixtu...

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Abstract

The invention discloses a hyperbranched-monomer-based fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve comprising a liquid crystal mixture. A liquid crystal mixture precursor contains, by mass percentage: 0.1 to 1% of a hyperbranched monomer, 4 to 4.9% of liquid crystal monomer, 0.2 to 0.4% of a photoinitiator, 0.1 to 10% of a chiral agent, and 85 to 95% of liquid crystal. In addition, the invention also discloses a preparation method of the fast-responsive polymer-stabilized cholesteric-phase liquid crystal light valve. According to the invention, with adding ofthe hyperbranched monomer into the liquid crystal mixture precursor, the response time of the liquid crystal light valve can be shortened effectively; and the graininess phenomenon of the liquid crystal light valve during the imaging process can be weakened.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a fast-response polymer-stabilized cholesteric liquid crystal light valve based on a hyperbranched monomer and a preparation method thereof. Background technique [0002] At present, liquid crystal materials have been widely used in the field of conventional display devices. With the development of science and technology and the improvement of people's living standards, three-dimensional display and wearable display have become popular directions of display devices. [0003] The display body of the 3D volumetric display system is composed of multi-layer liquid crystal light valves. The liquid crystal light valves are quickly switched between the scattering state and the transparent state through circuit driving. The refresh rate of the light valves must reach at least 48Hz to make the obtained picture stable. No flicker; in addition, because the image needs to p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/137C09K19/54C09K19/58
Inventor 赵兴明孙若力魏一振张卓鹏
Owner LIGHTIN INC
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