Ultralow optical anisotropy mixed liquid crystal material

An optically anisotropic, mixed liquid crystal technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of inability to use laser tuning devices, too much laser threshold damage, and not reaching the optimal value range, etc., to achieve good display. effect of effect

Active Publication Date: 2014-06-11
XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The publication number is EP0416117A, and the European patent "LIQUID CRYSTAL COMPOSITION" published on March 31, 1991 discloses a nematic liquid crystal material, wherein Δn is 0.065-0.120, and the resistivity ρ is 1×10 12 ~5×10 13 Ω·cm liquid crystal material, after actual testing, the infrared absorption coefficient is 0.5~0.7cm -1 , the mixed liquid crystal material Δn disclosed in this patent is at least 0.065, but relatively speaking, it is still higher than 0.06, which does not reach the optimal value range, and the infrared absorption coefficient> 0.5cm -1 , too much damage to the laser threshold to be used in laser tuning devices

Method used

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  • Ultralow optical anisotropy mixed liquid crystal material
  • Ultralow optical anisotropy mixed liquid crystal material
  • Ultralow optical anisotropy mixed liquid crystal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]

[0048] Taking 50g of mixed liquid crystal material as an example to describe its preparation process: use an electronic balance to weigh the following nine substances:

[0049] Monolithic liquid crystal

[0050] Put the above nine substances into a 100ml glass three-neck bottle with magnetic stirring function, under the protection of nitrogen, and under the condition of heating temperature of 50°C, stir while heating, the mixture in the bottle will melt from solid to liquid , heat for 3 minutes, when the mixture in the bottle reaches 70°C, keep it warm for 30 minutes, cool it down to room temperature naturally after the heat preservation, and form a milky white opaque nematic mixed liquid crystal material, and keep it sealed.

Embodiment 2

[0052]

[0053] Taking 50g of mixed liquid crystal material as an example to describe its preparation process: use an electronic balance to weigh the following nine substances:

[0054] Monolithic liquid crystal

[0055] Put the above nine substances into a 100ml glass three-neck bottle with magnetic stirring function, under the protection of nitrogen, and under the condition of heating temperature of 50°C, stir while heating, the mixture in the bottle will melt from solid to liquid , heat for 3 minutes, when the mixture in the bottle reaches 70°C, keep it warm for 30 minutes, cool it down to room temperature naturally after the heat preservation, and form a milky white opaque nematic mixed liquid crystal material, and keep it sealed.

Embodiment 3

[0057]

[0058] Taking 50g of mixed liquid crystal material as an example to describe its preparation process: use an electronic balance to weigh the following eight substances:

[0059] Monolithic liquid crystal

[0060] Put the above eight substances into a 100ml glass three-necked bottle with magnetic stirring function, under the protection of nitrogen, and at a heating temperature of 50°C, stir while heating, and the mixture in the bottle will melt from solid to liquid , heat for 3 minutes, when the mixture in the bottle reaches 70°C, keep it warm for 30 minutes, cool it down to room temperature naturally after the heat preservation, and form a milky white opaque nematic mixed liquid crystal material, and keep it sealed.

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Abstract

The invention provides an ultralow optical anisotropy mixed liquid crystal material. Three compounds are adopted, and are mixed according to different properties to make various properties of mixed liquid crystal optimal. A component A has a bicyclohexane structure, low birefraction and infrared absorption coefficient and high resistivity, and serves as an effective main component; a component B is a compound taking cyclohexane and a benzene ring as a framework and containing a fluorine substituent, and is used for forming a nematic phase of the liquid crystal and inhibiting a smectic phase of the mixed liquid crystal material caused by the addition of the component A; and a component C is a single liquid crystal material, has high-definition high light temperature, and can improve the using temperature of the mixed liquid crystal material. The liquid crystal material prepared has the characteristics of ultralow optical anisotropy, wide temperature range of the nematic phase, high resistivity and charge retention ratio, the infrared absorption coefficient of less than 0.5cm<-1>.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, in particular to an extremely low optical anisotropy mixed liquid crystal material. Background technique [0002] Flat-panel display technology has developed rapidly since the 1990s and has now become the mainstream of the display market. According to DisplaySearch survey data, liquid crystal displays are more important due to their high definition, good image color, environmental protection, non-radiation, lightness and portability. accounted for more than 80% of the share. The liquid crystal display utilizes the optical anisotropy and dielectric anisotropy of the liquid crystal material to realize the display function, so the liquid crystal material determines the performance of the display device. At present, TFT display devices occupy the mainstream of flat-panel liquid crystal display devices. Since liquid crystals are not self-illuminating, they need a backlight to achieve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K19/30
Inventor 邓登李建杜渭松李娟利甘宁骆伟惠培华
Owner XIAN CAIJING OPTO ELECTRICAL SCI & TECH
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