Cholesteric liquid crystal display device with adjustable reflection bandwidth

A technology of cholesteric liquid crystal and display device, which is applied to liquid crystal materials, static indicators, optics, etc., can solve the problems such as the inability to dynamically adjust the reflection bandwidth and the fixed reflection bandwidth, achieve stable pitch gradient, widen the reflection bandwidth, and realize reflection The effect of bandwidth

Inactive Publication Date: 2012-10-10
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional reflective cholesteric liquid crystal display devices are stabilized by polymers, so the reflection bandwidth cannot be adjusted dynamically; in addition, traditional devices only use chiral agents, so the reflection bandwidth is fixed and narrow

Method used

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  • Cholesteric liquid crystal display device with adjustable reflection bandwidth
  • Cholesteric liquid crystal display device with adjustable reflection bandwidth
  • Cholesteric liquid crystal display device with adjustable reflection bandwidth

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Embodiment

[0023] see figure 2 , a cholesteric liquid crystal display device with adjustable reflection bandwidth, has two layers of transparent substrates from top to bottom, which are respectively the first transparent substrate 1 and the second transparent substrate 4; between the first transparent substrate 1 and the second transparent substrate 4 There is a liquid crystal layer 5 between them; the first plane alignment layer 2 between the liquid crystal layer 5 and the first transparent substrate 1 and the second plane alignment layer 3 between the liquid crystal layer 5 and the second transparent substrate 4 are arranged respectively; wherein, The first plane alignment layer 2 and the second plane alignment layer 3 are antiparallel plane alignment layers. In specific fabrication, the anti-parallel plane alignment layer adopts a process in which the rubbing direction is opposite.

[0024] In this embodiment, the liquid crystal layer 5 is a cholesteric liquid crystal containing a g...

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Abstract

The invention discloses a cholesteric liquid crystal display device with an adjustable reflection bandwidth. The cholesteric liquid crystal display device comprises two transparent substrates and a liquid crystal layer, the first transparent substrate, the liquid crystal layer and the second transparent substrate are sequentially arranged from top to bottom, the liquid crystal layer consists of gelators, chiral ionic liquid, a chiral agent and nematic liquid crystal, and the nematic liquid crystal is negative liquid crystal. The chiral ionic liquid and the gelators are added into liquid crystal composition, spatial distribution of the chiral ionic liquid is controlled by an electric field, screw pitch gradient is formed, the gelators form a fiber network structure when the temperature is lower than gelatin temperature, the screw pitch gradient is stabilized, and accordingly the reflection bandwidth is broadened; and the reflection bandwidth of the cholesteric liquid crystal device can be dynamically and reversibly adjusted by the aid of a cooperating effect of the electric field and the temperature.

Description

technical field [0001] The invention relates to a color liquid crystal display device, and provides a cholesteric liquid crystal display device with adjustable reflection bandwidth prepared by using a gel factor stabilized cholesteric liquid crystal material. Background technique [0002] Polymer Stabilized Liquid Crystal (PSLC) composite material is a new type of liquid crystal functional material developed in the past 20 years. , optical switches, smart windows, reflective polarizers, etc. have broad application prospects. However, the traditional use of polymers to stabilize liquid crystals has the disadvantages of narrow reflection bandwidth and cannot achieve dynamic reversible adjustment of reflection bandwidth. [0003] figure 1 Shown is a conventional reflective cholesteric liquid crystal display device. It is characterized in that a liquid crystal layer is arranged in a sandwich shape by two transparent substrates, including a first transparent substrate 101, a f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337G02F1/1333G02F1/133G02F1/137C09K19/56
Inventor 陆红波张俊吕国强张贵玉
Owner HEFEI UNIV OF TECH
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