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Dye liquid crystal display

A liquid crystal display and dye technology, which is applied to liquid crystal materials, instruments, chemical instruments and methods, etc., can solve the problems of inconvenient mass production, complex preparation process, yellowish and greenish background color, etc., and achieves low cost, simple process, high contrast effect

Active Publication Date: 2015-05-20
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the background color of the STN display mode is yellowish and greenish, polarizers, retardation templates, coating certain materials on the substrate, color filters and other methods are commonly used to change the background color of STN. Adding one or more layers of dielectric to the simplest STN structure can improve the background color of STN to a certain extent, but the preparation process is complicated, the cost is high, and it is not convenient for large-scale production

Method used

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Examples

Experimental program
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Embodiment 1

[0048] The dye liquid crystal display of the present embodiment is as image 3 As shown, it consists of an upper polarizer 311, an upper substrate 321, an upper alignment layer 331, a liquid crystal layer 340 sandwiched between two alignment layers, a lower alignment layer 332, a lower substrate 322 and a lower polarizer 312, wherein the The liquid crystal layer 340 includes a liquid crystal composition including liquid crystals, a violet dichroic dye 350, and a chiral agent.

[0049] Such as image 3 As shown, taking the dotted line parallel to one side of the substrate as the horizontal line, the rubbing direction of the lower alignment layer is plus 30°, the rubbing direction of the upper alignment layer is minus 30°, the light absorption axis direction of the upper polarizer is plus 15°, and the rubbing direction of the lower polarizer The direction of the absorption axis is positive 75°.

[0050] When no power is applied, the dye liquid crystal display is in a non-worki...

Embodiment 2

[0057] The dye liquid crystal display of the present embodiment is as image 3 As shown, it consists of an upper polarizer 311, an upper substrate 321, an upper alignment layer 331, a liquid crystal layer 340 sandwiched between two alignment layers, a lower alignment layer 332, a lower substrate 322 and a lower polarizer 312, wherein the The liquid crystal layer 340 includes a liquid crystal composition including liquid crystals, a violet dichroic dye 350, and a chiral agent.

[0058] Such as image 3 As shown, taking the dotted line parallel to one side of the substrate as the horizontal line, the rubbing direction of the lower alignment layer is plus 30°, the rubbing direction of the upper alignment layer is minus 30°, the light absorption axis direction of the upper polarizer is plus 15°, and the rubbing direction of the lower polarizer The direction of the absorption axis is positive 75°.

[0059] When no power is applied, the dye liquid crystal display is in a non-worki...

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Abstract

The invention provides an STN (Super Twisted Nematic) dye liquid crystal display. According to the dye liquid crystal display, black characters are on a white background. The dye liquid crystal display sequentially comprises an upper polaroid, an upper substrate, an upper orientation layer, a liquid crystal layer, a lower orientation layer, a lower substrate and a lower polaroid. The liquid crystal layer comprises liquid crystal compositions. The liquid crystal compositions comprise liquid crystal parents and dichroism dye. The liquid crystal parents comprise one or more kinds of liquid crystal compounds and chiral agents. The weight proportion of the dichroism dye in the liquid crystal compositions is smaller than or equal to 0.8%. Deltan*d of the liquid crystal parents ranges from 600 nm to 1200 nm. The olivine ground color in the STN displaying mode can be absorbed by the dichroism dye, the displaying effect that the black characters are on the white background can be achieved, and the dye liquid crystal display further has the advantages of being wide in view angle range, high in contrast ratio, simple in technology and low in cost.

Description

technical field [0001] The invention relates to a dye liquid crystal display device, in particular to an STN (Super Twisted Nematic, Super Twisted Nematic) dye liquid crystal display with black characters on a white background. Background technique [0002] Liquid crystal display is a widely used flat-panel display, which has the characteristics of thin profile, low power consumption and low driving voltage. The liquid crystal display panel is a passive device that does not emit light itself. Its working principle is to place liquid crystal molecules between two parallel glass substrates. There are many small vertical and horizontal wires in the two glass substrates. By controlling the voltage to change the liquid crystal molecules The arrangement direction of the backlight module refracts the light emitted by the backlight module to generate a corresponding picture. Conventional liquid crystal display modes include TN display mode suitable for low line number drive and STN...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/139C09K19/60
CPCC09K19/60G02F1/1333G02F1/1397
Inventor 董昆马文阳
Owner JIANGSU HECHENG DISPLAY TECHCO