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Multistable display material and preparation method

A multi-stable, display agent technology, applied in liquid crystal materials, chemical instruments and methods, etc., can solve the problems of small operating temperature range, insufficient response speed, unstable cholesteric liquid crystal pitch, etc., and achieve low energy consumption. Effect

Inactive Publication Date: 2012-08-15
HALATION PHOTONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some reflective display devices currently reported are some display devices developed by utilizing the bistable characteristics of cholesteric liquid crystals, but the helical pitch of cholesteric liquid crystals is easily affected by temperature and becomes unstable, and the additional cost is relatively high. Expensive Chiral Liquid Crystal Materials
In addition, the bistable liquid crystal material has only two stable states, which cannot realize multi-grayscale display
Smectic A-type multistable liquid crystals have the characteristics of good stability and can realize multi-gray scale display, but some smectic A-type multistable liquid crystals reported so far have a driving voltage > 100V, and the operating temperature range is not large, and the response speed Not fast enough, etc. make its practicability limited by some conditions

Method used

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  • Multistable display material and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The image display agent and image eraser listed in Table 1 were weighed and mixed in proportion, put into a quartz glass container, heated to 40° C., ultrasonically oscillated for 30 minutes, and cooled to room temperature. The obtained mixture is the multi-stable display material of this embodiment. Weigh 0.01 g of the multi-stable display material and pour it into a glass hollow box whose inner surface is coated with a simple image made of ITO material through capillary action. Place the prepared glass box in a temperature-adjustable heating stage, and use an AC signal output device capable of adjusting voltage (3V-100V), frequency (5HZ-10KHZ) and waveform number (the waveform used is a square wave) to pair A series of tests are performed by applying electrical signals to a glass cell in a hot stage. The measured operating temperature is -10°C to 60°C, the best driving voltage is 35V, the image erasing time is 2 milliseconds, and the image display time is 5 millisecon...

Embodiment 2

[0031] The image display agent and image eraser listed in Table 2 were weighed and mixed in proportion, put into a quartz glass container, heated to 150° C., ultrasonically oscillated for 1 min, and cooled to room temperature. The obtained mixture is the multi-stable display material of this embodiment. Weigh 0.01 g of the multi-stable display material and pour it into a glass hollow box whose inner surface is coated with a simple image made of ITO material through capillary action. Place the prepared glass box in a temperature-adjustable heating stage, and use an AC signal output device capable of adjusting voltage (3V-100V), frequency (5HZ-10KHZ) and waveform number (the waveform used is a square wave) to pair A series of tests are performed by applying electrical signals to a glass cell in a hot stage. The measured operating temperature is -20°C to 50°C, the best driving voltage is 20V, the image erasing time is 5 milliseconds, and the image display time is 7 milliseconds. ...

Embodiment 3

[0035]The image display agent and image eraser listed in Table 3 were weighed and mixed in proportion, put into a quartz glass container, heated to 80° C., ultrasonically oscillated for 50 minutes, and cooled to room temperature. The obtained mixture is the multi-stable display material of this embodiment. Weigh 0.01 g of the multi-stable display material and pour it into a glass hollow box whose inner surface is coated with a simple image made of ITO material through capillary action. Place the prepared glass box in a temperature-adjustable heating stage, and use an AC signal output device capable of adjusting voltage (3V-100V), frequency (5HZ-10KHZ) and waveform number (the waveform used is a square wave) to pair A series of tests are performed by applying electrical signals to a glass cell in a hot stage. The measured operating temperature is 0°C to 75°C, the optimum driving voltage is 70V, the image erasing time is 2 milliseconds, and the image displaying time is 8 millise...

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Abstract

A multistable display material and a preparation method. The material comprises an image display agent and an image erasing agent, wherein the image display agent is a liquid crystal material with a structural formula satisfying general formula (I), and the content of the image display agent is 90 wt%-99.999 wt% of the total weight of the multistable display material; the image erasing agent is an organic ionic compound, and the content of the image erasing agent is 0.0001 wt%-10 wt% of the total weight of the multistable display material. The preparation method of the material comprises the following steps: weighing and mixing the image display agent and the image erasing agent in proportion, heating to 40 DEG C-150 DEG C, performing ultrasonic vibration for 1 min-120 min, cooling to room temperature. The material has a wide working temperature range, a low driving voltage, and a high response speed, is widely applicable to automobile and building light-adjusting films / glass, and reflective display devices such as new-generation electronic book screens, digital photo frames, electronic tags, novel super-large screen display technology, and the like.

Description

technical field [0001] The invention relates to a multi-stable display material and a preparation method thereof. The material can be widely used in reflection types such as automotive and building dimming films / glasses, new-generation e-book screens, digital photo frames, electronic tags, and new ultra-large screen display technologies. display device. Background technique [0002] Most of the traditional display devices use nematic liquid crystals, which change and maintain the alignment state of the liquid crystals through electrical signals, thereby adjusting the light transmission of the backlight source to display images, which belong to the transmissive display. This type of display must have a backlight, and most of the backlight energy will be consumed, so the energy utilization rate is low, and the picture will disappear immediately after power off. The reflective display device does not use a backlight source, because the power consumption of the backlight source...

Claims

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Application Information

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IPC IPC(8): C09K19/60
Inventor 孙刚宋君荣谭志先
Owner HALATION PHOTONICS CORP
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