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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 the problems of increasing frame width, contradicting the development trend of narrow frame, and increasing cost, and achieve the effect of simple preparation process conditions.

Inactive Publication Date: 2012-12-19
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 component distribution ratio of the high-resistance material in this embodiment is: 230 g of opacifying agent titanium black, 120 g of acrylic resin, 648.8 g of solvent, and 1.2 g of bis-3-(aminopropyl)tetramethylsiloxane as a silane coupling agent.

[0056] Concrete preparation process is as follows:

[0057] Using a homogenizer, mix 230g of titanium black (chemical formula, TiN x o y , x: 0.7~1.0, y: 0.3~0.6) (purchased from Mitsubishi Materials Denkasei Co., Ltd. Titanium Black Electronic Materials), 120g acrylic resin (60% dipentaerythritol hexa(meth)acrylate and 40% diphenoxy ethylene glycol 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 Ketone mixture) was stirred and dispersed for 1 hour to obtain a pre-dispersion, and then, the pre-dispersion was added to a grinder filled with 70% (based on the volume of the...

Embodiment 2

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

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

Embodiment 3

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

[0065] The obtained high-resistance material is coated on glass by a slit coating method to form a black matrix with a thickness of 1.0 um, which can be used in liquid crystal display devices. After testing, the OD value is 3.5, the resistivity is 4.0E+14Ω.cm, and 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 invention relates to the field of display technology, in particular to a high-resistance material, a display substrate black matrix (black matrix, BM for short) and a liquid crystal display device including the material. Background technique [0002] The black matrix on the color filter substrate plays an important role in TFT_LCD (Thin Film Transistor Liquid Crystal Display). It prevents R, G, and B color pixels from mixing with each other to maintain the necessary color saturation. The black matrix is ​​also used to block and absorb external incident light to prevent it from directly or indirectly irradiating the a-Si layer in the channel region of the TFT device through reflection and scattering, causing deterioration of the off-state characteristics of the TFT device; To block the light leakage caused by the gap between the array leads and the ITO pixel electrodes on the array substrate, to avoid the reduction of image contrast; the third is b...

Claims

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Application Information

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Patent Type & Authority Applications(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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