Plastic liquid crystal film and making method thereof

Abstract

The invention relates to a plastic liquid crystal film which comprises a liquid crystal-plastic core layer and two transparent conductive films, wherein the transparent conductive films are parallel and are arranged symmetrically, the liquid crystal-plastic core layer is clamped between the two transparent conductive films and comprises a high molecular polymer substrate, micro balls made of a liquid crystal material are uniformly distributed in the high molecular polymer substrate, the refractive index of the high molecular polymer substrate is matched with the refractive index of ordinary light of the liquid crystal material, liquid crystal molecule directors in the micro balls made of the liquid crystal material are approximately parallel to the two transparent conductive films, and electrodes are arranged on the transparent conductive films. The plastic liquid crystal film has the characteristic of high scattering degree during power off, and the gray level of the plastic liquid crystal film can be adjusted when the voltage of an external electric field is between a threshold voltage and a saturation voltage.

Description

technical field [0001] The invention relates to a plastic liquid crystal film and a manufacturing method thereof. The plastic liquid crystal film comprises a liquid crystal-plastic core layer and two parallel and symmetrically arranged transparent conductive films. The liquid crystal-plastic core layer includes a high The molecular polymer matrix is ​​uniformly distributed with liquid crystal material microspheres in the polymer matrix, and the directors of liquid crystal molecules in the liquid crystal material microspheres are approximately parallel to the two transparent conductive films. technical background [0002] U.S. Patent No. 4,671,618 discloses a plastic liquid crystal material. The liquid crystal is dispersed in a fixed plastic in the form of liquid crystal particles. The liquid crystal particles have an effective particle size for scattering incident light. The liquid crystal accounts for at least the weight of the material in the material. 50% of that, wherein...

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Problems solved by technology

[0003] In the above-mentioned plastic liquid crystal, the directors of the liquid crystal particles have no specific and preferred orientation, and are arranged in a three-dimensional disorder. The absolute value of the angle (acute angle) between the directors of some liquid crystal molecules and the direction of light propagation deviates far from 90°, resulting in uneven scattering. Well, and because the angle distribution of the liquid crystal molecular director and the transparent conductive layer is random, the gray scale cannot be controlled between the threshold voltage and the saturation voltage

In addition, there will be contact between the liquid crystal droplet and the conductive film. If the charged particles of the liquid crystal droplet run on the conductive layer, it will cause erosion and damage to the conductive layer, which will affect the life and use effect of the plastic liquid crystal film.

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