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A Liquid Crystal Fluorescent Light Scattering Display Containing Trace Gelation Factor

A gel factor and light scattering technology, which is applied in liquid crystal materials, optics, nonlinear optics, etc., can solve the problems of high gel factor content and low contrast, and achieve the effects of simple preparation process, high brightness and wide field of view

Active Publication Date: 2018-05-08
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a liquid crystal fluorescent light scattering display screen by adding a small amount of gel factor and ultraviolet fluorescent powder without using polarizers, which overcomes the high content of gel factor in liquid crystal gels, the need for polarizers in traditional liquid crystal displays and the Low contrast and other disadvantages, the preparation process is simple, and can be applied to the field of fluorescent light scattering display with high image contrast

Method used

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  • A Liquid Crystal Fluorescent Light Scattering Display Containing Trace Gelation Factor
  • A Liquid Crystal Fluorescent Light Scattering Display Containing Trace Gelation Factor
  • A Liquid Crystal Fluorescent Light Scattering Display Containing Trace Gelation Factor

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The imaging schematic diagram of the liquid crystal fluorescent light scattering display screen containing a small amount of gel factor prepared by the present invention is as follows figure 1 shown.

[0024] At 150°C, 4.5wt% 4,4-diethoxyazobenzene, 4.5wt% 107 UV oily phosphor and 0.5wt% gel factor D were added to 90.5wt% 5CB liquid crystal, gel factor D is the compound of formula (IX). Mix well for 20 minutes in an oil bath at 150°C, wait until it dissolves, introduce it into a device made of a glass slide while it is still hot, and use the thickness of the double-sided adhesive to control The thickness of the device is 2.21mm, the thickness of the liquid crystal layer is 0.05mm, and then it is cooled to room temperature to form a liquid crystal gel system with fluorescent properties. After the device is exposed to 365nm ultraviolet light for 30 minutes through a "ZJUT" pattern photomask, the fabricated A liquid crystal fluorescent light-scattering display screen cont...

Embodiment 2

[0028] At 150°C, 4.5wt% 4,4-diethoxyazobenzene, 4.5wt% YD-11 phosphor and 0.1wt% gel factor D were added to 90.9wt% 5CB liquid crystal, gel factor D For the compound of formula (IX), mix well for 20 minutes in an oil bath at 150°C, wait until it dissolves, introduce it into a device made of a glass slide while it is still hot, and control the thickness of the double-sided adhesive The thickness of the device is 2.21mm, the thickness of the liquid crystal layer is 0.05mm, and then it is lowered to room temperature to form a liquid crystal gel system with fluorescent properties. In the light scattering and transparent state, the luminous intensity of fluorescence is different before and after irradiating with 365nm ultraviolet light for 30 minutes. The results like figure 2 shown.

[0029] When the system was in the light scattering state before ultraviolet light irradiation, it was detected that the system emitted strong fluorescence; when the system was in a transparent stat...

Embodiment 3

[0032] At 250°C, 82.0wt% E7 liquid crystals were mixed with 8.2wt% 4-dimethylaminoazobenzene, 8.2wt% MC-17 phosphor and 1.6wt% gel factor C ((VI): (VII ): (VIII) with a mass ratio of 1:2:3), in an oil bath at 250°C, mix well for 10 minutes, wait until it dissolves, and introduce it into a device made of a glass slide while it is still hot after the dissolution is completed. Use the thickness of double-sided adhesive to control the thickness of the device to 2.33mm, and the thickness of the liquid crystal layer to 0.06mm, and then lower it to room temperature to form a liquid crystal gel system with fluorescent properties. Liquid crystal fluorescent light-scattering display.

[0033] The results show that the fluorescent light-scattering display screen prepared by the present invention has obvious contrast in fluorescence intensity and exists stably in the range of visible light.

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Abstract

The invention provides a liquid crystal fluorescence light scattering display screen containing a trace of gelators. The liquid crystal fluorescence light scattering display screen is prepared from liquid crystal physical gel obtained by adding a proper amount of gelators in a liquid crystal matrix compound containing an azobenzene compound and fluorescent powder. The liquid crystal physical gel contains, by mass, 82.0%-97.9wt% of the liquid crystal matrix compound, 1-8.2wt% of the azobenzene compound, 1-8.2wt% of the ultraviolet fluorescent powder and 0.1-1.6wt% of the gelators. The liquid crystal fluorescence light scattering display screen is characterized by a high contrast ratio of liquid crystal; with only a trace of gelators and without polarizing films, the display screen can be applied to the field of light scattering display of non-backlight lamps; the fluorescence light scattering display screen is simple in manufacturing process, is stable in visible light owing to ultraviolet excitation, and has the advantages of wide field of view, high brightness and high image contrast ratio.

Description

(1) Technical field [0001] The invention relates to a liquid crystal fluorescent light scattering display screen containing a small amount of gel factor. (2) Background technology [0002] Liquid crystal physical gel is a new type of soft matter material, which has both the anisotropy of liquid crystal and the thermal reversibility of gel. The microphase separation structure formed by it induces or improves the optoelectronic, photochemical and electrical properties of the liquid crystal. Therefore, liquid crystal physical gels are widely used in light scattering displays, gratings, semiconductor materials and other fields. [0003] Generally, the content of gelling factor in liquid crystal gels used in liquid crystal light-scattering displays is relatively high. If the gel strength required by the liquid crystal light-scattering display can be achieved by adding a small amount of gel factor, a liquid crystal light-scattering display with a low content of gel factor can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1334C09K19/52
CPCC09K19/52C09K2019/526G02F1/1334G02F1/13345
Inventor 陈思张远豪王旭童晓茜吴波震马猛施燕琴
Owner ZHEJIANG UNIV OF TECH