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Liquid crystal display

A liquid crystal display and display technology, applied in the direction of instruments, nonlinear optics, optics, etc., can solve problems such as color shift

Inactive Publication Date: 2016-12-07
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, transitions between the two states may produce unwanted color shifts
The color shift in the reflection band is an inherent shortcoming of cholesteric liquid crystals

Method used

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Embodiment Construction

[0143] The present invention is concerned with improving images in liquid crystal displays, and in particular with light conversion means for improving dark states, thereby increasing contrast.

[0144] The following will clearly illustrate the spirit of the present invention with drawings and detailed descriptions. After any person with ordinary knowledge in the technical field of the present invention understands the embodiments of the present invention, he can change and modify it by the technology taught by the present invention. without departing from the spirit and scope of the present invention.

[0145] This embodiment is a blue-phase liquid crystal display, wherein the blue-phase liquid crystal layer includes blue-phase liquid crystal molecules and optically active dopants. The optically active dopant can be used to form the double twisted columnar structure of the blue phase liquid crystal. The lattice period of the blue-phase liquid crystal determines the reflected...

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Abstract

The invention discloses a liquid crystal display, the display comprises a first base material, a second base material, a blue phase liquid crystal layer which is arranged between the first base material and the second base material and a light conversion means which is arranged between the second base materal and the blue phase liquid crystal. The light conversion means is used for converting light with preset wave length from a first preset electromagnetic radiation range to a second preset electromagnetic radiation range. The first preset electromagnetic radiation range is a visible light wave length range. The second preset electromagnetic radiation range is an invisible light wave length range, so that the light leak is reduced to be in a daker state than before. The light conversion means converts the visible light wave length range from 470-510 nanometers to the invisible light wave length range. In addition, optical dopants are added to the blue phase liquid crystal layer, the wave length of the blue phase liquid crystal layer is displaced to 470-510 nanometers visible light range.

Description

technical field [0001] The present invention relates to a liquid crystal display, in particular to a blue phase and cholesterol (cholesteric) liquid crystal display. Background technique [0002] The blue phase is a liquid crystal phase between chiral nematic (such as cholesterol) and isotropic phases, and only exists in a narrow temperature range (2-3° C.), but has a very rapid switching time. [0003] Generally speaking, optically active dopants and / or monomers are added to the blue-phase liquid crystal layer to induce the blue-phase liquid crystal molecules to form a more stable double-twisted columnar structure, so it is less susceptible to temperature changes. This extends the temperature range. [0004] The lattice period of the blue-phase liquid crystal determines the reflected wavelength of incident light, thus generating selective Bragg (Bragg) reflection based on the wavelength of the incident light. In other words, due to the material properties of the blue-phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335G02F1/137
CPCG02F1/133514G02F1/137G02F2201/343G02F1/13793G02F1/1335G02F2202/108G02F1/133509G02F1/133614G02F1/13324G02F1/13306
Inventor 曹梓毅蔡正晔俞方正蓝伊奋陈薏庭黄柏荣林思妤
Owner AU OPTRONICS CORP
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