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Antiferroelectric liquid crystal cell

A liquid crystal cell, antiferroelectric technology, applied in nonlinear optics, instruments, optics, etc., can solve the problem of unsatisfactory light transmission rate

Inactive Publication Date: 2003-10-01
CITIZEN WATCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, among other characteristics, there are still many unsatisfactory points in the contrast, that is, the ratio of light transmission rate between white display and black display states

Method used

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  • Antiferroelectric liquid crystal cell
  • Antiferroelectric liquid crystal cell
  • Antiferroelectric liquid crystal cell

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Experimental program
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Effect test

Embodiment

[0043] In order to apply a sinusoidal voltage of a single frequency on the antiferroelectric liquid crystal cell and measure the fundamental and harmonic components of the output voltage at this time, prepare Figure 7 circuit as shown. for the preparation of Figure 7 In the liquid crystal cell in the paper, a polyimide with a thickness of 300 angstroms was deposited as an alignment film on each of the two glass plates by the spin coating method, and then the two substrates were bonded together. Thereafter, the liquid crystal cell is preheated to about 100°C, and the AFLC material is injected into the liquid crystal cell by vacuum injection technology.

[0044] After the liquid crystal thickness is set to 1.5μm and the optical path length is about 220nm, press Figure 7 Set up the liquid crystal cell as shown in , and measure the dielectric constant. exist Figure 7 Among them, reference number 1 is a power supply with a reference frequency, and the liquid crystal cell 2 ...

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Abstract

The contrast of an antiferroelectric liquid crystal cell having a structure in which an antiferroelectric liquid crystal is sandwiched between a pair of substrates is improved. The antiferroelectric liquid crystal cell has a layer structure so that when a sine wave voltage as a reference frequency is applied to the liquid crystal cell and its output signal is Fourier transformed, the transformed output voltage contains an odd number of the reference frequency and even frequency components, and its optical path length is 100nm to 800nm.

Description

technical field [0001] The present invention relates to liquid crystal cells used for liquid crystal displays and the like. In particular, the invention relates to the use of antiferroelectric liquid crystals and antiferroelectric liquid crystal cells with good display quality. Background technique [0002] Antiferroelectric liquid crystals (hereinafter referred to as AFLCs) are characterized in that they have a large spontaneous polarization Ps compared to other liquid crystal materials. As is well known, in an antiferroelectric liquid crystal cell whose structure is that AFLC is sandwiched between a pair of substrates, AFLC molecules are arranged in layers to which no voltage is applied, and the structure is such that spontaneous polarization is canceled between the layers. Compared with the use of conventional nematic liquid crystals, the AFLC material discovered in 1988 was originally introduced as a material that provides a mode that does not cause burn-in, which is th...

Claims

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Application Information

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IPC IPC(8): G02F1/133G02F1/141G09G3/36
CPCG02F1/13306G09G3/3633G02F1/1412G02F1/141
Inventor 铃木康
Owner CITIZEN WATCH CO LTD
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