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Liquid crystal turning additive, liquid crystal display device containing it and manufacturing method

A liquid crystal display device, liquid crystal alignment technology, applied in static indicators, nonlinear optics, instruments, etc., can solve the problems of prolonged initialization time, increased applied voltage, instability, etc.

Active Publication Date: 2005-11-09
AU OPTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest disadvantage of the OCB mode liquid crystal display is that during the initialization process, there is an unstable (discontinuous) state between the sloped state and the bent state (the voltage increases from 0 to Vc). image 3 , so that the OCB modal liquid crystal display must first be driven with a high voltage to a steady state every time it is used
In this way, the required applied voltage will be increased, and the initialization time will be extended to several minutes

Method used

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  • Liquid crystal turning additive, liquid crystal display device containing it and manufacturing method
  • Liquid crystal turning additive, liquid crystal display device containing it and manufacturing method
  • Liquid crystal turning additive, liquid crystal display device containing it and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The polymerizable monomer 9 shown in Table 1 is mixed with the doping amount of 2.0wt% into the optical compensation bending type liquid crystal compound (manufactured and sold by Chisso Company, the characteristics of liquid crystal molecules are: Δn=0.142, Δε=10.5, γ =35.7mPa·s), and injected into the liquid crystal display device. Next, a voltage is applied to switch the liquid crystal compound from a slant state to a bend state. Next, at a voltage of 5V, ultraviolet light was irradiated to polymerize the polymerizable monomer. The test was carried out in the same manner as the comparative example, and the results are shown in Table 4.

[0067] refer to Figure 9 , which shows the scanning electron microscope (Scanning Electron Microscope, SEM) spectrogram of the lower substrate side of the P-OCB liquid crystal display device described in Example 1, as shown in the figure, the lower substrate 200 is followed by the lower electrode 210, an alignment layer 220, and a ...

Embodiment 2

[0069] Carry out in the same manner as shown in Example 1, but change the doping amount of the polymerizable monomer 9 shown in Table 1 to 2.5%, and irradiate ultraviolet light at a voltage of 2.5V to polymerize the polymerizable monomer, The test results are shown in Table 4.

[0070] Example 1

Example 2

Doping amount

2wt%

2.5wt%

Voltage during polymerization reaction

5V

2.5V

Response time

0.39 / 1.96

2.35

0.39 / 2.75

3.14

0.39 / 1.76

2.15

0.39 / 2.76

3.14

0.39 / 1.77

2.16

0.39 / 2.35

2.74

average

2.22

average

3.01

[0071] refer to Figure 10 , this figure is the viewing angle diagram of the P-OCB liquid crystal display device described in a preferred embodiment of the present invention, as can be seen from the figure, the maximum CR (contrast ratio) valu...

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Abstract

The invention discloses a liquid crystal additive of optics compensating double refraction, a LCD containing the additive and the manufacture method. The additive includes one kind or several kinds of single bodies which can aggregate. After being irradiated on the direction adjusting layer, these single bodies form a kind of aggregation which has the liquid crystal array memory ability. Then, liquid crystal molecules can quickly switch from the spreading condition to the curved condition in the memory direction. Thus, the LCD needs a general driving circuit rather than a special high-press driving circuit to attain to the steady situation fast.

Description

technical field [0001] The present invention relates to a liquid crystal display device, in particular to a liquid crystal display device with an optically compensated birefringence mode. Background technique [0002] Liquid crystal displays are widely used in practical applications due to their advantages of low radiation and small size. [0003] However, when the user views the liquid crystal display from different angles, the contrast ratio will gradually decrease with the increase of the viewing angle, thereby resulting in a limitation of the viewing angle. In addition, the response speed of the current liquid crystal display device is still somewhat insufficient, which makes the display of dynamic images often blurred due to image retention. Compared with CRT display devices, current liquid crystal displays are still inferior to CRT display devices in this respect. In the system announced by the National Television Standards Conference (NTSC) in the United States, it ...

Claims

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Application Information

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IPC IPC(8): G02F1/1337
Inventor 林堃裕杨凯能吴铭洪张豪裕
Owner AU OPTRONICS CORP
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