Color filter and liquid crystal display device using the same
US7330229B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2007 |
| Grant date | Feb 12, 2008 |
| Priority date | — |
| Expiry date | Jun 20, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133512
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color filter of the present invention includes a large number of colored layers of a plurality of colors regularly arranged together. The color filter is such thatxWH−0.05≦xB≦xWH+0.05 and yWH−0.05≦yB≦yWH+0.05orxWH−0.10≦xB≦xWH and yWH−0.10≦yB≦yWHis satisfied, where (xWH, yWH) is the chromaticity in the CIE 1931 chromaticity diagram when the filter alone is irradiated with light to produce a white display, and (xB, yB) is the chromaticity in the CIE 1931 chromaticity diagram when the filter is irradiated with the same light while being interposed between a pair of polarization plates arranged in a crossed Nicols state each having a degree of polarization of 99.98% or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.