Bistable liquid crystal handwriting device

A bistable liquid crystal and writing device technology, applied in liquid crystal materials, optics, instruments, etc., can solve the problems of low contrast and low font brightness, and achieve high contrast, easy to carry, and low price

Active Publication Date: 2013-08-14
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a bistable liquid crystal handwriting device, which overco

Method used

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  • Bistable liquid crystal handwriting device
  • Bistable liquid crystal handwriting device
  • Bistable liquid crystal handwriting device

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Two pieces of 25cm*20cm PET film were provided, with an indium tin oxide (ITO) conductive film on one surface of the PET film.

[0044] Weigh 5g of the mixture. The composition of the mixture is 80% smectic A phase liquid crystal and 20% polymer. Both the smectic A phase liquid crystal and the polymer are produced by Jiangsu Hecheng Chemical Materials Co., Ltd., and the models are HJC150600-000 and JH- 002. The mixture was stirred well at room temperature.

[0045] Spread the mixture evenly between two sheets of PET with ITO, and control the thickness of the mixed layer to 10 microns.

[0046] After uniform coating, the mixture was polymerized under a UV lamp for 3 minutes, or baked in an oven at 70° C. for 30 minutes to complete phase separation.

[0047] After the phase separation is complete, it can be written, showing white fonts and patterns.

[0048] The written content can be erased by applying 80V 50Hz alternating current to ITO-PET.

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Abstract

The invention provides a bistable liquid crystal handwriting device comprising a first substrate layer, a first electric conducting layer, a mixing layer, a second electric conducting layer and a second substrate layer. The mixing layer comprises, by weight, 30%-95% of smectic A-phase liquid crystals and 5-70% of polymers. When a pointed pen is used for writing on the handwriting device, selective pressure responses are performed by the device. After the handwriting device is powered on, written content can be erased. The bistable liquid crystal handwriting device has the advantages of high contrast, low price, portability and the like, can display white or colored character fonts or patterns and can be cut into any shape.

Description

technical field [0001] The invention relates to a bistable liquid crystal handwriting device, in particular to a reusable bistable liquid crystal handwriting device which uses white or colored fonts to write, display and delete information. Background technique [0002] In the field of liquid crystal displays, bistable liquid crystal displays have gradually become mainstream due to their extremely low power consumption. After the bistable display displays the text or image, it can keep the text or image for a long time without the support of energy until it is switched to the next content, so the energy consumed for long-term display is greatly saved. [0003] In recent years, research on bistable liquid crystal displays has mainly focused on cholesteric liquid crystal materials. Cholesteric liquid crystal itself has several different states, including the vertical state in which the liquid crystal molecules are parallel to the electric field under the electric field, and t...

Claims

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Application Information

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IPC IPC(8): G02F1/1333G06F3/041
CPCG06F3/041C09K19/542C09K19/06C09K19/02G02F2001/13775G02F1/13G06F3/0412G02F1/13775
Inventor 宋晓龙陈昭远王盼盼季飞李鹏飞
Owner JIANGSU HECHENG DISPLAY TECHCO
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