Polymer dispersed liquid crystal electronic paper and manufacturing method thereof

Abstract

The invention relates to a polymer dispersed liquid crystal electronic paper and a manufacturing method thereof. A composite film is constituted by two transparent flexible conductive films and a polymer dispersed liquid crystal layer, wherein, electrodes are etched on the two flexible transparent conductive films. A polymer is modified polyurethane acrylate which is added by a surfactant and lecithin, and liquid crystal is dielectric switching liquid crystal material which is the mixture of 20 percent biphenyl ester and 80 percent difluoro diphenylacetylene or the product with the same series. When a low-frequency electric field is imposed on the polymer dispersed liquid crystal electronic paper, the polymer dispersed liquid crystal electronic paper is in the transparent open state, and the transparent open station is still maintained after removing the electric field; when a high-frequency electric field is imposed, the polymer dispersed liquid crystal electronic paper is in the scattering closed state, and the scattering closed state is still maintained after removing the electric field. The manufacturing method of the polymer dispersed liquid crystal electronic paper is to form the weak anchoring polymer which is packaged by a dielectric switching liquid crystal droplet structure by separating after mixing the weak anchoring polymer with the dielectric switching liquid crystal. The manufacturing method combines the natures of the weak anchoring polymer and the dielectric switching liquid crystal with the dual-frequency drive of low-frequency writing and high-frequency erasing so as to realize the stable zero-field of the polymer dispersed liquid crystal, thereby obtaining the new electronic paper technology or being applied as a new product of dimming glass.

Description

technical field [0001] The invention relates to a polymer dispersed liquid crystal electronic paper, which realizes the zero-field bistability of the polymer dispersed liquid crystal with a simple design scheme, and then obtains a new portable, flexible, energy-saving and environmentally friendly electronic paper technology, or as a light-adjustable functional film, sandwiched between Glass can be used in special applications in fields such as architectural decoration. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC for short) is a mixture of polymer, nematic liquid crystal and spacer in a certain ratio, sandwiched between two flexible transparent conductive films, after phase separation, liquid crystal from The polymer is precipitated to form microdroplets, and the polymer solidifies a composite film in which the liquid crystal microdroplets are wrapped. When no electric field is applied, because the refractive index of the polymer does not match the r...

AI Technical Summary

Problems solved by technology

Polymer-dispersed cholesteric liquid crystals can be bistable, but there are problems such as relatively high driving voltage, poor contrast, etc.

However, there is no bistable solution for polymer dispersed nematic liquid crystals.

In addition, several other nematic liquid crystal bistable solutions such as BTN, BiNem, ZBD and other technologies need to use polarizers, and the light utilization rate is only 30%, so there is no competitive advantage

Images