Low power liquid crystal display backlight
US4915478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 1988 |
| Grant date | Apr 10, 1990 |
| Priority date | — |
| Expiry date | Oct 5, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A liquid crystal display panel having a backlight for providing high brigess, uniformity of illumination intensity, high efficiency, and long battery life, and which can be manufactured at a low cost. The display device includes a liquid crystal display panel, a light source for illuminating the liquid crystal panel, a light passage member which can be formed of a transparent material disposed between the liquid crystal panel and the light source. The light source inlet side of the light passage member is formed with a recess with the thickness being reduced at the region diametrically opposed to the light source. A light reflecting member reflects light from the light source. Within the photoconductor, two or more of the wedged shaped photo conductor can be used for increased area of coverage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.