Back lighting device for a liquid crystal panel
US4937709A · kind A · utility
51Cited by
5References
2Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Aug 14, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Aug 14, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0071
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A back lighting device for a liquid crystal display has a light scattering coating in the form of dots covering the light emitting surface of a photo-conductive plate. The coating covers 3-50% of the surface nearest an end thereof adjacent a linear light source and covers 80-100% of the surface farthest from the light source. The variation of the coating rate across the surface produces uniform distribution of emitted light from the back lighting device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.