Electrochromic fiber device based on multistable cholesteric liquid crystal and preparation method

Abstract

The invention discloses an electrochromic fiber device based on multistable cholesteric liquid crystal and a preparation method thereof. The device comprises an array combination of a plurality of liquid crystal fibers, wherein each liquid crystal fiber comprises an outer cladding layer, a spacer, an inner electrode and a cholesteric liquid crystal material, wherein the spacer, the inner electrodeand the cholesteric liquid crystal material are positioned in the outer cladding layer, and the outer cladding layer and the inner electrode are concentric cylinders; the spacer is arranged between the outer cladding layer and the inner electrode and is respectively adjacent to the inner side surface of the outer cladding layer and the outer side surface of the inner electrode; the region betweenthe outer cladding layer and the inner electrode except for the spacer is filled with the cholesteric liquid crystal material. According to the method, the electrochromic fiber based on the cholesteric liquid crystal material is adopted, so that the driving voltage is stable, and the treatment is convenient. The electrochromic fiber is obviously superior to the thermochromic and photochromic liquid crystal fibers in the aspects of controllability, stability, environmental adaptation and the like; and the electrochromic fiber based on the cholesteric liquid crystal material has good controllability and multistability, and has great application advantages in the aspect of liquid crystal color change.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal color change, and in particular relates to an electrochromic fiber device based on multistable cholesteric liquid crystal and a preparation method. Background technique [0002] The orientation of liquid crystal molecules will change under the action of an external force field (such as temperature, electric field or light), resulting in a change in the refractive index of the material to light; cholesteric liquid crystals use their unique helical molecular arrangement to achieve Bragg reflection of incident light, showing brilliant colors in visible light. Due to the unique helical structure, cholesteric liquid crystals can achieve very vivid color display, and the helical pitch is very sensitive to temperature. When the helical pitch is equivalent to the wavelength of light, it will produce strong selective reflection. Under sunlight, as the temperature rises, the color of cholesteric liq...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: the central wavelength of the light source is limited by the clearing point of the liquid crystal and cannot cover the entire visible light band, the color display effect is poor, and the device regulation is too dependent on temperature, and the stability is relatively poor

Its main disadvantages are: the light source is difficult to control, it is difficult to achieve precise control of the ideal color, and it is not suitable for working in the visible light range, and the stability and controllability are relatively poor

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