Stressed liquid crystal transparent projection screen as well as preparation method and application thereof

A projection screen, strained liquid crystal technology, applied in optics, instruments, nonlinear optics, etc., can solve the problem that the shearing effect of polymer dispersed liquid crystal has not been widely developed, and achieve price advantages, energy saving advantages, good imaging effects, and transparency. good effect

Inactive Publication Date: 2012-02-15
范志新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, the research on strained liquid crystals has been paid attention to in the preparation of liquid crystal devices such as lar

Method used

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  • Stressed liquid crystal transparent projection screen as well as preparation method and application thereof
  • Stressed liquid crystal transparent projection screen as well as preparation method and application thereof
  • Stressed liquid crystal transparent projection screen as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1, Strained liquid crystal transparent projection screen with glass substrate

[0030] The first step is to prepare liquid crystal glue

[0031] Use 30% epoxy resin DCL3000, 60% polyester acrylate MR100, 4% chain transfer agent and 4% photoinitiator TPO, 2% sulfur salt to prepare a prepolymer, the prepolymer, nematic The phase liquid crystal material is stirred and mixed uniformly in a ratio of 1:1 to prepare a liquid crystal glue mixed material, and the ratios are all mass percentages;

[0032] The second step is to clean the substrate

[0033] Wash the flat glass substrate in the sink. Wipe the cleaned glass with a clean cloth to ensure that there are no stains and water stains on the glass. The lower glass substrate is 8cm wider than the upper glass substrate;

[0034] The third step is to spread the microspheres

[0035] Install a solvent volatile glue (such as butyl acetate) added with plastic microspheres in the sprayer, and spray evenly on a glass substrate, the so...

Example Embodiment

[0046] Example 2, Strained liquid crystal transparent projection screen with acrylic substrate

[0047] The first step is to prepare the liquid crystal glue mixed material

[0048] Use 30% epoxy resin DCL3000, 60% polyester acrylate MR100, 4% chain transfer agent and 4% photoinitiator TPO, 2% sulfur salt to prepare a prepolymer, the prepolymer, nematic The phase liquid crystal material is stirred and mixed uniformly in a ratio of 1:1 to prepare a liquid crystal glue mixed solution, and the ratios are all mass percentages;

[0049] The second step is to clean the substrate

[0050] Clean the acrylic substrate in a water tank. Wipe the cleaned acrylic substrate with a clean cloth to ensure that there is no stain or water stain on the acrylic substrate. The lower acrylic substrate is 6cm wider than the upper acrylic substrate;

[0051] The third step is to spread the microspheres

[0052] Install the solvent volatile glue (such as butyl acetate) added with plastic microspheres in the spray...

Example Embodiment

[0062] Cut off the extra part of the wide sheet of acrylic to make the upper and lower acrylic substrates neat, and polish the corners of the acrylic. Embodiment 3, film substrate strained liquid crystal transparent projection screen

[0063] The first step is to prepare the liquid crystal glue mixed material

[0064] Use 30% epoxy resin DCL3000, 60% polyester acrylate MR100, 4% chain transfer agent and 4% photoinitiator TPO, 2% sulfur salt to prepare a prepolymer, the prepolymer, nematic The phase liquid crystal material is stirred and evenly mixed in a ratio of 1:1 to prepare a liquid crystal glue mixed material, and the percentages are all mass percentages;

[0065] The second step is to clean the substrate

[0066] Clean the film substrate in the sink, and wipe the cleaned film with a clean cloth to ensure that there are no stains and water stains on the film; the upper and lower film substrates have the same size;

[0067] The third step is to spread the microspheres

[0068] Inst...

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Abstract

The invention relates to a stressed liquid crystal transparent projection screen which is composed of two transparent substrates (such as glass or acrylic or film) and a polymer dispersion liquid crystal layer between the two transparent substrates. The polymer dispersion liquid crystal layer is prepared from an ultraviolet light cured pre-polymer, a nematic phase liquid crystal material and gasket material plastic micro-spheres, wherein the ultraviolet light cured pre-polymer is composed of a polymerizable monomer, a chain transfer agent and a photo-initiator; and the mass ratio of the pre-polymer to the nematic phase liquid crystal is 1:1. The production method of the stressed liquid crystal transparent projection screen is an ultraviolet light curing process; ultraviolet lights are used for obliquely irradiating and a polymer is directionally polymerized; and stress is timely applied to directionally arraying and fixing liquid crystal molecules, so that the product has a more transparent appearance. The stressed liquid crystal transparent projection screen prepared by the invention has the advantage of clear projection imaging; glass products are suitable for solid transparent projection screens such as window showcases and the like; acrylic products are suitable for movable or suspended transparent projection screens such as exhibitions, theatre stages, karaoke and the like; and film products are suitable for portable type transparent projection screens and the application range of the film products is wider after the film products are matched with a mini-type projector (liquid crystal on silicon LCOS). According to the stressed liquid crystal transparent projection screen provided by the invention, audiences not only can see projected images but also can clearly see backstage scenes across the screen, so that the stressed liquid crystal transparent projection screen has a magic effect of suspending objects in the air.

Description

technical field [0001] The technical solution of the invention relates to a transparent projection screen based on polymer dispersed liquid crystal strain effect. Background technique [0002] Polymer dispersed liquid crystal (referred to as PDLC) film is a high-tech product invented in the 1980s. It has application value in many fields such as dimming glass, large-screen display, and holographic grating. It is still a topic of concern to researchers of liquid crystal devices. In the study of polymer dispersed liquid crystals, it was found that applying shear stress to the upper and lower substrates of polymer dispersed liquid crystal products or polymer network liquid crystal products prepared from glass substrates will cause light transmission, which is the shear effect of polymer dispersed liquid crystals ( Sheared Liquid Crystal), it is a kind of strained liquid crystal (Stressed Liquid Crystal), and the Institute of Liquid Crystals of the University of Kent in the Unite...

Claims

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Application Information

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IPC IPC(8): G03B21/60G03B21/62G02F1/1334G02F1/1333
Inventor 范志新
Owner 范志新
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