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High-impedance material, and display substrate black matrix and liquid crystal display apparatus containing same

A high-impedance, black-matrix technology, applied in instruments, coatings, optics, etc., can solve problems such as increased frame width, cost increase, and narrow frame development trends, and achieves the effect of simple preparation process conditions

Inactive Publication Date: 2015-04-15
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In response to this situation, there is currently a design of adding Dummy Pixels (dummy pixels) on both sides of the TFT and covering them with BM; although this defect can be covered up, it will increase the width of the border, and the increase will be at least about 0.1mm ~ 0.2mm, which will inevitably bring costs increase, contrary to the development trend of narrow borders
[0010] Another situation is to adjust the timing of the backlight and the Panel (LCD), prolong the lighting time of the backlight, first complete the initialization of the Panel, and then complete the lighting of the entire module, but this problem cannot be fundamentally solved.
[0011] Therefore, in view of the problem of white lines around the black screen of TFT-LCD ADS products at the moment of starting up, a fundamental solution is sought to completely improve the display effect of the product

Method used

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  • High-impedance material, and display substrate black matrix and liquid crystal display apparatus containing same
  • High-impedance material, and display substrate black matrix and liquid crystal display apparatus containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The composition ratio of the high-resistance material of this embodiment is: 230 g of the sunscreen titanium black, 120 g of the acrylic resin, 648.8 g of the solvent, and 1.2 g of the silane coupling agent bis-3-(aminopropyl)tetramethylsiloxane.

[0056] The specific preparation process is as follows:

[0057] Using a homogenizer, put 230g of titanium black (chemical formula, TiN x O y , X: 0.7 ~ 1.0, y: 0.3 ~ 0.6) (purchased from Mitsubishi Materials Electronics Co., Ltd. titanium black electronic materials), 120g acrylic resin (60% dipentaerythritol hexa (meth) acrylate and 40% diphenoxy A mixture of ethyl alcohol fluorene diacrylate), 648.8g solvent (250g 1,2-propylene glycol methyl ether acetate (PGMEA), 12g ethylene glycol monomethyl ether acetate, 130g ethylene glycol diethyl ether and 256.8g cyclohexane The mixture of ketones) was stirred and dispersed for 1 hour to obtain a pre-dispersion solution. Then, the pre-dispersion solution was added to a grinder filled with...

Embodiment 2

[0061] In addition to 490g titanium black, 208.8g acrylic resin, 300g solvent (117g 1,2-propylene glycol methyl ether acetate (PGMEA), 3g ethylene glycol monomethyl ether acetate 0% to 2%, 60g ethylene glycol diethyl ether And 120g cyclohexanone mixture). The high-resistance material for resin black matrix was formed according to the same method as in Example 1, and a black composition of 49% titanium black for sunscreen and 20.88% for resin was prepared.

[0062] The obtained high-resistance material is coated on the glass by a slit coating method to form a black matrix with a thickness of 1.0um, which can be used in a liquid crystal display device. The tested OD value is 5, the resistivity is 6.5E+14Ω.cm, and it has high optical density and high resistance.

Embodiment 3

[0064] Except for 200 g of titanium black and 30 g of carbon black, the same method as in Example 1 was followed to form a high resistance material for resin black matrix.

[0065] The obtained high-resistance material is coated on the glass by a slit coating method to form a black matrix with a thickness of 1.0um, which can be used in a liquid crystal display device. After testing, the OD value is 3.5, the resistivity is 4.0E+14Ω.cm, and it has high optical density and high resistance.

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Abstract

The invention provides a high-impedance material which is composed of the following components by weight percent: 10 to 30 % of bonding resin, 20 to 50 % of an opacifier, 30 to 65 % of a solvent and 0.03 to 0.2 % of an adhesive modifier. The high-impedance material provided by the invention can be used for preparing a black matrix (BM) which can play a role of isolation. By applying the black matrix to a liquid crystal display apparatus, induced charges generated due to electric field change at electrode lead areas on both sides of a lower substrate are enabled to gather and bound at the edge of an upper-side BM area at the instant of power on, and do not diffuse and leak into an inner side, so that situations of white lines on both sides of ADS products can be thoroughly resolved.

Description

Technical field [0001] The present invention relates to the field of display technology, in particular to a high-impedance material and a black matrix (abbreviated as BM) and liquid crystal display device of a display substrate including the material. Background technique [0002] The black matrix on the color film substrate plays an important role in TFT_LCD (Thin Film Transistor Liquid Crystal Display). It can prevent R, G, B color pixels from mixing with each other to maintain the necessary color saturation. The black matrix is ​​also used to block and absorb the incident light from the outside, avoiding it directly or indirectly through reflection and scattering on the a-Si layer of the channel region of the TFT device, causing the deterioration of the off-state characteristics of the TFT device; secondly, the black matrix also plays a role. To shield the light leakage caused by the gap between the array lead on the array substrate and the ITO pixel electrode, to avoid the r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D135/02C09D179/08C09D7/12G02F1/1335
Inventor 暴军萍李兴华贺伟江定荣
Owner BOE TECH GRP CO LTD
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