Resin black matrix for liquid crystal display device
US5786042A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 26, 1996 |
| Grant date | Jul 28, 1998 |
| Priority date | — |
| Expiry date | Apr 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31721
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention provides a resin black matrix with a light-shading agent dispersed in a resin, comprising the use of carbon black satisfying at least one of the following features of (A) to (D), as said light-shading agent. PA1 (A) 6.5 or less in pH PA1 (B) 0.001<COOH! in the carboxyl group concentration COOH! on the surface, as a molar ratio per all carbon atoms PA1 (C) 0.001<OH! in the hydroxyl group concentration on the surface, as a molar ratio per all carbon atoms PA1 (D) 0.001<SO.sub.3 H! in the sulfonic acid group concentration on the surface, as a molar ratio per all carbon atoms The present invention also provides a black paste with a light-shading agent dispersed in a resin or its precursor solution, comprising the use of carbon black satisfying at least one of the above features of (A) to (D) as said light-shading agent. The third aspect of the present invention is a color filter, comprising said resin black matrix. The color filter of the present invention is, by using said carbon black, high in light-shadability and can display images with excellent quality when set in liquid crystal display devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.