Color filter subject to impurity extraction treatment and liquid crystal display device having high voltage holding ratio
US6624861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2001 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Apr 25, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2201/50
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are a color filter, which can prevent, on a higher level, a liquid crystal layer from being contaminated with ionic materials, and a liquid crystal display device having improved display quality. The color filter comprises at least a substrate and a colored layer of a plurality of colors provided in a predetermined pattern on the substrate, and, after impurity elution, permits a liquid crystal to have a voltage holding ratio of not less than 90%. The liquid crystal display device comprises: this color filter; and a counter electrode substrate provided so as to face the color filter while leaving a gap between the color filter and the counter electrode substrate through a seal member; and a liquid crystal layer sealed into the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.