Liquid crystal display device

A technology of liquid crystal display device and liquid crystal layer, applied in static indicators, nonlinear optics, instruments, etc., can solve problems such as uniform orientation, difficult to obtain retardation, electrostatic damage, etc.

Active Publication Date: 2007-05-30
JAPAN DISPLAY INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This rubbing process has problems in that contamination due to dust generated during rubbing and electrostatic damage caused by rubbing against the transparent substrate on which the TFT type element is mounted cause the manufacturing yield to decrease due to these.
However, considering that the phase difference is not very large, its influence is not as good as that of the uniform orientation, and it is difficult to obtain a phase plate with a small phase difference, so no phase difference compensation is performed.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]FIG. 1 is an explanatory diagram illustrating a cross-sectional structure and an axial structure of an IPS mode liquid crystal panel according to Embodiment 1 of the present invention. (a) of Fig. 1 is a cross-sectional structure diagram of a liquid crystal panel constituting an IPS liquid crystal display device, a liquid crystal layer LC is sandwiched between substrates SUB1 and SUB2, and an organic material such as a color filter CF is arranged on the main surface of a substrate SUB2. An orientation film ORI2 is arranged on the color filter CF. In addition, the pixel electrode PX and the counter electrode CT are arranged on the main surface of the substrate SUB1, and the orientation film ORI1 is arranged thereon.

[0037] FIG. 1( b ) is an explanatory diagram of the axial structure of the IPS liquid crystal panel shown in FIG. 1( a ). In addition, α in (b) of FIG. 1 is an arbitrary angle of 0 to 360°. In addition, the direction of the axis is a direction indicating t...

Embodiment 2

[0101] In Example 1, for the substrate SUB2 on which the organic film such as the color filter CF is formed, and the substrate SUB1 on which the pixel electrode PX and the counter electrode CT are formed, polyimide is coated on these substrates by the spin coating method. A 6% N-methylpyrrolidone solution of acid and polyimide is heat-treated at 230° C. for 2 hours to form an alignment film layer OR12 or OR11 with a film thickness of about 100 nm. In the alignment treatment of the alignment film, the wavelength of 254nm is used, and the converted value is about 15mW / cm 2 The polarized light irradiation system with the highest light intensity, adjust the irradiation time so that the irradiation amount is 20J / cm 2 irradiate the linearly polarized light. In addition, at the time of irradiation, the substrate was placed on a hot plate that can be heated to 150° C., and irradiation was performed while heating. The manufacturing method of other liquid crystal display devices is th...

Embodiment 3

[0104] In Example 1, the substrate SUB2 on which the organic film such as the color filter CF is formed, and the substrate SUB1 on which the pixel electrode PX and the counter electrode CT are formed are coated with polyimide by the spin coating method. The 8% N-methylpyrrolidone solution of acid and polyimide is heat-treated at 230° C. for 2 hours to form an alignment film layer OR12 or OR11 with a film thickness of about 200 nm. In the alignment treatment of the alignment film, the wavelength of 254nm is used, and the converted value is about 15mW / cm 2 The polarized light irradiation system with the highest light intensity, adjust the irradiation time so that the irradiation amount is 15J / cm 2 irradiate the linearly polarized light. In addition, at the time of irradiation, the substrate was placed on a hot plate that can be heated to 200° C., and irradiation was performed while heating. The manufacturing method of other liquid crystal display devices is the same as that of...

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Abstract

The present invention provides a liquid crystal display device to which retardation of a desired value is imparted. In the liquid crystal display device of the invention, orientation films which are oriented by the light radiation possess a retardation value of 1.0 nm or more and an anchoring strength of 1.0x10<-3>Jm<-2> or more.

Description

technical field [0001] The invention relates to a liquid crystal display device. The present invention is particularly suitable for a liquid crystal display device in which an alignment treatment has been performed on an alignment film by irradiating light. Background technique [0002] In the manufacture of a liquid crystal display device, as a usual treatment of a liquid crystal alignment control layer, a treatment of rubbing a substrate with a cloth on an organic film made of polyimide or the like, that is, a so-called rubbing treatment, is performed. This rubbing process has problems in that contamination due to dirt generated during rubbing and electrostatic damage due to rubbing against the transparent substrate on which the TFT element is mounted cause a decrease in manufacturing yield. For this reason, a non-contact liquid crystal alignment technology is desired, and one of the methods is photo-alignment treatment (Patent Document 1). [0003] The technology disclo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1337G02F1/133
CPCG02F1/133784G02F1/133788G02F1/134363
Inventor 酒井亚纪国松登园田英博小林节郎
Owner JAPAN DISPLAY INC
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