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Liquid crystal display panel and photo-alignment method thereof

A liquid crystal display panel, photo-alignment technology, applied in optics, nonlinear optics, instruments, etc., can solve the problems of high viscosity and slow response speed of negative liquid crystal monomers, improve contrast, increase and decrease anchoring energy The effect of LCD recovery time

Active Publication Date: 2017-09-19
NANJING CEC PANDA LCD TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the utilization rate of light in the negative FFS display mode is relatively high, the monomer viscosity of the negative liquid crystal is relatively high, and its response speed is slow
This becomes a major problem with negative display technology

Method used

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  • Liquid crystal display panel and photo-alignment method thereof
  • Liquid crystal display panel and photo-alignment method thereof
  • Liquid crystal display panel and photo-alignment method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the first embodiment of the present invention, the photo-alignment process provided by the present invention is performed on the upper substrate 10 and the lower substrate 30 at the same time.

[0036] The photo-alignment processing steps of the lower substrate 30 and the upper substrate 10 are as follows:

[0037] Step 1: coating an alignment film material suitable for photo-alignment treatment on the upper substrate 10 and the lower substrate 30 to form an upper alignment film 40 and a lower alignment film 50 respectively.

[0038] Step 2: If figure 2 As shown, ultraviolet light with a wavelength of less than 330nm is selected to irradiate the alignment film 50 of the display domain in the upper half of the pixel on the lower substrate 30 along the direction x1 to form the alignment direction of the liquid crystal, so that the display in the upper half of the pixel The liquid crystal molecules 20 in the domain form an angle Φ1 with the horizontal direction of the...

Embodiment 2

[0048] In the second embodiment of the present invention, only the photo-alignment process provided by the present invention is performed on the upper substrate 10 , and the lower substrate 30 uses conventional parallel or vertical alignment process.

[0049] The alignment processing steps of the lower substrate 30 and the upper substrate 10 are as follows:

[0050] Step 1: coating an alignment film material suitable for photo-alignment treatment on the upper substrate 10 and the lower substrate 30 to form an upper alignment film 40 and a lower alignment film 50 respectively.

[0051] Step 2: If figure 2 As shown, ultraviolet light with a wavelength of less than 330nm is selected to irradiate the alignment film 50 of the display domain in the upper half of the pixel on the lower substrate 30 along the direction x1 to form the alignment direction of the liquid crystal, so that the display in the upper half of the pixel The liquid crystal molecules 20 in the domain form an ang...

Embodiment 3

[0059] In the third embodiment of the present invention, only the photo-alignment treatment process provided by the present invention is performed on the lower substrate 30 , and the upper substrate 10 uses conventional parallel or vertical alignment treatment.

[0060] The alignment processing steps of the lower substrate 30 and the upper substrate 10 are as follows:

[0061] Step 1: coating an alignment film material suitable for photo-alignment treatment on the upper substrate 10 and the lower substrate 30 to form an upper alignment film 40 and a lower alignment film 50 respectively.

[0062] Step 2: If figure 2 As shown, ultraviolet light with a wavelength of less than 330 nm is selected to irradiate the alignment film 40 of the display domain in the upper half of the pixel on the upper substrate 10 along the direction x1 to form the alignment direction of the liquid crystal. Preferably, the wavelength of ultraviolet light used for photo-alignment is 313nm or 254nm.

[...

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Abstract

The invention discloses a liquid crystal display panel and an optical alignment method thereof. The alignment method comprises the following steps: 1 carrying out optical alignment on a optical alignment film (PI), and forming different alignment directions in upper and lower domains of a pixel; 2 applying voltage Vop on the panel, so that liquid crystal is arranged according to a certain direction, and then carrying out optical alignment on the liquid crystal panel. In order to obtain relatively good anchoring energy, optical alignment can be carried out for a plurality of times in the second step; optical wavelengths for alignment in the two steps are different. Through design of an alignment angle, finally, the anchoring energy of the liquid crystal can be increased; the liquid crystal recovery time Toff can be effectively reduced, thus the response time of the overall panel is improved. The alignment method disclosed by the invention can be simultaneously applied to an upper substrate and a lower substrate or one of the upper substrate and the lower substrate; the optimal black-state liquid crystal molecule arrangement direction can be achieved through optimization of the alignment method; the contrast of the panel is improved.

Description

technical field [0001] The invention relates to the field of display devices, in particular to a liquid crystal display panel using a negative liquid crystal boundary electric field switch display technology and an optical alignment method thereof. Background technique [0002] In recent years, a series of technologies for improving the image quality of LCDs have emerged. Among them, the fringe field switching technology (FFS: Fringe Field Switching for short) can simultaneously achieve the requirements of high penetration and large viewing angle, so it is highly regarded by relevant industry players. Pay attention to. [0003] FFS technology is a fringe electric field generated between the top strip pixel electrode and the bottom planar COM electrode on the lower substrate, so that the liquid crystal molecules between the electrodes and directly above the electrodes can rotate parallel to the plane of the glass substrate. Technology. The FFS technology is an in-plane swit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337
CPCG02F1/133753G02F1/133788G02F1/133757
Inventor 陈钢时陶
Owner NANJING CEC PANDA LCD TECH
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