Optical filter in fluorescent liquid crystal display devices
US4416515A · kind A · utility
24Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1981 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | Mar 23, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2019/0433
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A fluorescent liquid crystal display of the type where light is permeable comprises a fluorescent material contained within a liquid crystal material for providing fluorescence, an exciting source for dispersing exciting radiation to stimulate the fluorescent material, a wavelength band of the fluorescence being apart from that of the exciting radiation to be absorbed by the fluorescent material, and filter means for controlling the propagation of the exciting radiation to enhance display contrast of the fluorescent liquid crystal display.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.