VA (vertical alignment) liquid crystal display device containing optical active ingredients
A liquid crystal display and optically active technology, which is applied in optics, liquid crystal materials, nonlinear optics, etc., can solve the problems of insufficient absolute value, insufficient driving voltage, and insufficient viscosity of liquid crystal media, etc., to meet the requirements of use and response speed Fast, low drive voltage effect
Active Publication Date: 2015-03-25
JIANGSU HECHENG DISPLAY TECH CO LTD
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Problems solved by technology
However, there are still some problems to be solved. For example, the absolute value of the negative dielectric constant anisotropy of the liquid crystal medium is not large enough, resulting in a low driving voltage; the viscosity of the liquid crystal medium is not low enough, resulting in the inability to meet the needs of fast response.
Method used
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Embodiment 1
[0061] A liquid crystal display device was constructed as in Comparative Example 1.
[0062] According to the weight ratio listed in Table 3, the optically active substance involved in the present invention is added to the liquid crystal medium M-1 of Comparative Example 1, which is filled in the liquid crystal layer (4) between the two substrates of the liquid crystal display for performance testing, test data As shown in the table below:
[0063] Table 3 liquid crystal medium formula and its test performance
[0064]
[0065] By using the optically active substance represented by the general formula (I), the liquid crystal medium can obtain a lower driving voltage and improve the response speed while keeping the photoelectric parameters basically unchanged, so it is very suitable for VA display mode operation in the LCD display.
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Abstract
The invention provides a liquid crystal display device with vertical alignment. The liquid crystal display device comprises an upper electrode base plate, a lower electrode base plate, and a liquid crystal layer between the upper electrode base plate and the lower electrode base plate, wherein the liquid crystal layer comprises a negative liquid crystal medium; and the liquid crystal medium comprises at least one optical active ingredient. The liquid crystal display device has the advantages that the liquid crystal medium arranged between the upper electrode base plate and the lower electrode base plate contains liquid crystal molecules with optical activity, the liquid crystal molecules in the electric field can obtain large power through low driving voltage, so as to rapidly rotate, the operation requirement on low driving voltage by a display can be satisfied, and the liquid crystal medium has low viscosity and high clearing points.
Description
technical field [0001] The invention relates to the field of liquid crystal display, in particular to the application of a chiral agent-added liquid crystal medium with negative dielectric constant anisotropy in VA mode. Background technique [0002] In recent years, researchers have developed different liquid crystal display modes. Among them, the most important liquid crystal display modes are TN (Twisted Nematic) mode, STN (Super Twisted Nematic) mode, IPS (In-Plane Switching) mode, OCB (Optical Controlled Birefringence) mode and VA (Vertical Alignment) mode, etc. . All of these modes use an electric field, where the electric field for TN (Twisted Nematic), STN (Super Twisted Nematic), OCB (Optical Controlled Birefringence) and VA (Vertical Alignment) modes is substantially perpendicular to the substrate, or vertical in the liquid crystal layer. In addition to these modes, there are also electro-optical modes using an electric field substantially parallel to the substr...
Claims
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IPC IPC(8): G02F1/1333G02F1/139C09K19/52
Inventor 宋晓龙陈昭远
Owner JIANGSU HECHENG DISPLAY TECH CO LTD