Backlight for liquid crystal devices
US5211463A · kind A · utility
82Cited by
5References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0633
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight system for liquid crystal device display is equipped with a dual lighting system for day viewing and compatible with night vision systems. The day lighting system uses conventional fluorescent or incandescent lamps for full color display during daytime use. The night lighting system uses a light source which is either filtered to remove infrared and near infrared wavelengths or which is chosen from a class of sources which does not emit such wavelengths. The day lighting system is disabled while the night system is in use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.