Tunable color filter
US5689317A · kind A · utility
45Cited by
19References
54Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 22, 1995 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Mar 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13473
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A color filter having an optical switch element located between a neutral linear polarizer and a second color-selective linear polarizer, followed by one or more optical retarders and a second neutral linear polarizer. When a second optical switch element is incorporated, three color states are produced. The filter may also comprise a guest host type cell as the optical switch element. The resulting color filter exhibits high performance both for on-axis and off-axis rays and can be designed to produce a wide range of colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.