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Electronically controlled dimming film

A dimming film and electronic control technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of low open-state transmittance and high driving voltage

Active Publication Date: 2017-11-28
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to provide an electronically controlled dimming film to solve the problems of high driving voltage and low on-state transmittance that are easily caused by adding dyes to polymer dispersed liquid crystals in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] In this embodiment, an electronically controlled dimming film is prepared, and its preparation method is as follows:

[0053] (1) Fix the single piece of ITO film on the semi-automatic coating machine, pay attention to the transparent conductive layer upward; secondly, drop the prepared electrochromic layer to be cured slurry evenly on the fixed end of the ITO film, and then start the semi-automatic coating The cloth machine uses wire rods of models 1 to 10 to control the layer thickness, and the coating is completed at a uniform speed at a speed of 1m / min. Finally, it passes through a UV curing machine and is cured by UV light to form an electrochromic layer.

[0054] (2) Fix the single piece of ITO film on the semi-automatic coating machine, pay attention to the transparent conductive layer upward; secondly, the previously prepared polymer dispersed liquid crystal layer to be cured slurry, evenly dripped on the fixed end of the ITO film, and then start the semi-automat...

Embodiment 2

[0061]In this example, an electronically controlled dimming film is prepared. The preparation method is the same as in Example 1, except that, before coating the electrochromic layer and the polymer-dispersed liquid crystal layer, two ITO films are coated with epoxy Resin anti-corrosion layer.

[0062] The raw material components and consumption of the polymer dispersed liquid crystal layer and the raw material components and consumption of the electrochromic layer are as follows:

[0063]

[0064] The above-mentioned liquid crystal has a molecular weight of 420, a refractive index of 1.486, a dielectric coefficient of 13, a clearing point of 85°C, an optical anisotropy Δn of 0.246, and a viscosity of 92; the square resistance of the ITO film is 75Ω / port, and the transmittance is 86.9%, haze value <1.7%.

Embodiment 3

[0066] In this example, an electronically controlled dimming film is prepared. The preparation method is the same as in Example 1, except that, before coating the electrochromic layer and the polymer-dispersed liquid crystal layer, two ITO films are coated with epoxy Resin anti-corrosion layer.

[0067] The raw material components and consumption of the polymer dispersed liquid crystal layer and the raw material components and consumption of the electrochromic layer are as follows:

[0068]

[0069]

[0070] The above-mentioned liquid crystal has a molecular weight of 380, a refractive index of 1.525, a dielectric coefficient of 15, a clearing point of 95°C, an optical anisotropy Δn of 0.219, and a viscosity of 84; the square resistance of the ITO film is 155Ω / port, and the transmittance is 90%, haze value <1.55%.

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Abstract

The invention discloses an electric control dimming film, which comprises an upper electrode layer, a polymer dispersion liquid crystal layer, an electrochromic layer and a lower electrode layer from top to bottom, wherein the electric control dimming film simultaneously comprises the polymer dispersion liquid crystal layer and the electrochromic layer. Compared with the prior art adopting a measure of adding dye into the polymer dispersion liquid crystal layer, the electric control dimming film has the advantages that the polymer dispersion liquid crystal layer and the electrochromic layer are respectively adopted, and the problems of too high driving voltage and too low on-state transmission rate due to dye introduction into the polymer dispersion liquid crystal layer can be solved. Meanwhile, the electrochromic layer is applied to the electric control dimming film, the stable and invertible color change can occur under the effect of an extra electric field, and the electric control dimming film can show the colored and transparent invertible change on the appearance. On the basis of the special color change mechanisms of the electrochromic layer, the electric control dimming film provided by the invention realizes the true sense of electric control color change.

Description

technical field [0001] The invention relates to the field of manufacturing electronically controlled dimming films, in particular to an electrically controlled dimming film. Background technique [0002] Polymer dispersed liquid crystal (PDLC for short) is made by mixing low-molecular liquid crystal with prepolymer and undergoing polymerization reaction under certain process conditions. Micron-scale liquid crystal particles are uniformly dispersed in the solid polymer matrix, and the liquid crystal particles have dielectric anisotropy. Under the condition of an external electric field, the polymer-dispersed liquid crystal can realize the transition between transparent and opaque, making the thin film Light transmittance is adjustable. Due to its unique adjustable light transmittance, it is widely used in electronically controlled dimming films. [0003] At present, the structure of electronically controlled dimming film is mainly composed of upper and lower layers of trans...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1334G02F1/1347G02F1/157
CPCG02F1/1334G02F1/13471G02F1/157
Inventor 丁清华吴泓辉杨茂义
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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