Wide view angle type polymer-dispersed liquid crystal composition, display device and manufacturing method

Abstract

The invention relates to a polymer-dispersed liquid crystal composition and a polymer-dispersed liquid crystal display device manufactured by using the polymer-dispersed liquid crystal composition. The polymer-dispersed liquid crystal composition comprises a nematic phase liquid crystal material, an acrylic acid oligomer, a diluting monomer, an initiator, a spacer and the like. The invention provides a highly-crosslinked oligomer which solves the problem of a narrow view angle of an existing dimming membrane and is high in polymer selection curing speed and high in crosslinking density; the highly-crosslinked oligomer is prepared from a diluting monomer which is high in hardness, high in diluting capacity and not liable to yellow; and furthermore, selected liquid crystals no and an oligomer and diluting monomer mixture np meet a condition that np is greater than no. By optimization of selection of the liquid crystal material and the acrylic acid oligomer and optimization of a preparation method, the display device has the characteristics and properties of ultra-wide view angle, driving voltage lower than safety voltage, low haze, high transmittance and the like; and due to the properties, the application range and the application place of the display device are greatly expanded.

Description

technical field [0001] The invention relates to the technical field of liquid crystal materials, in particular to a polymer-dispersed liquid crystal composition with a wide viewing angle, a display device and a preparation method. Background technique [0002] Polymer Dispersed Liquid Crystal (PDLC) is a composite liquid crystal material with special photoelectric properties. Its principle is that after the small molecule liquid crystal material and polymer are mixed, the polymer undergoes a polymerization reaction under external influence to produce phase separation. The liquid crystal molecules are separated from the mixture, and finally form a device with display dimming function. [0003] Polymers and liquid crystals play a major role in PDLCs. We know that liquid crystal is a liquid substance with crystal-like properties, which is different from ordinary liquids in optical and electrical properties, specifically manifested in anisotropy in optical and electrical proper...

AI Technical Summary

Problems solved by technology

Liquid crystal n is required in prior art theory o with polymer n p Try to be as consistent as possible. After applying the electric field, the haze is relatively low and transparent at a viewing angle of 0°, but when viewed at a smaller angle, the haze will increase significantly, which makes the dimming device better only at a viewing angle of zero. light, which greatly limits its application as a dimming device

This also poses a higher challenge to the majority of scientific and technological workers - PDLC devices with ultra-wide viewing angles

[0006] In addition, the driving voltage of existing PDLC products is generally higher than 50V, which not only consumes high energy, but also poses safety hazards once leakage occurs

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