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Method for improving nagative liquid crystal response

A negative type, liquid crystal material technology, applied in liquid crystal materials, chemical instruments and methods, thin material processing, etc., can solve problems such as unfavorable verticality of segmentation

Inactive Publication Date: 2004-05-19
SONY DEUT GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latter requires a more efficient method to facilitate the desired alignment in the on state, which is detrimental to split perpendicularity in the off state

Method used

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  • Method for improving nagative liquid crystal response
  • Method for improving nagative liquid crystal response
  • Method for improving nagative liquid crystal response

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0094] The experimental results in the figure are obtained as follows:

[0095] The MLC-2038 and 0.1 wt% mixture were mixed (with a magnetic stirrer) on a hot plate at 100°C overnight for 10 hours. The mixture was centrifuged at 5000 rpm for 7 minutes. This mixture was then used to fill a 5 μm EHC grid by capillary action on a hot plate at 100°C. Then, the filled lattice was tempered on a hot plate at 100° C. for 10 hours, and then gradually cooled.

[0096] The response profile was detected by placing the graticule on an optical microscope with crossed polarizers, then applying a 250 Hz square wave AC drive, and detecting the transmittance with a photodiode. The response times used to compare the improvement effects are those of the first HWP voltage. This gives a field strength of about 1 Vpp / μm (0.5 Vpg / μm). When the LC is doped, the field strength varies by ±0.1 Vpp / μm for all dopants. For pure MLC-2038 in a 5 μm EHC negative cell, the first HWP voltage is 5.3 Vpp. F...

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Abstract

The present invention relates to a method of improving the response times and bulk on-state alignments of negative-type liquid crystals by providing a liquid crystal material that comprises at least one negative-type mesogen comprising at least one soluble, dipolar dopant.

Description

technical field [0001] The invention relates to a method for improving the response time of the negative type liquid crystal and the arrangement of the bulk open state. Background technique [0002] Display technology for electronic devices requires displays with high brightness and contrast, low power consumption and fast refresh / response speed. For projector display components, liquid crystal technology is being developed, with a particular focus on splitting vertically aligned negative liquid crystals in the off state. In these materials it is important to achieve good segment verticality in the off state, fast response time, good uniform alignment in the on state, high opacity in the off state and good contrast. [0003] In a typical display lattice and polarizer system, an electric field is applied to split the vertically aligned birefringent liquid crystals. When an electric field is applied, the liquid crystals align along the field to such an extent that the birefr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13C09K19/04C09K19/58
CPCC09K19/58Y10T428/10C09K2323/00
Inventor A·罗伯茨增谷启安田章夫B·许勒桥本俊一
Owner SONY DEUT GMBH
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