Top light source device
US6709144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Apr 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0051
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This invention provides a backlight device which includes at least: a photo conductive plate used for visible light to go through; a point light source, which is beside the photo conductive plate, used for producing visible light; a first diffusing top, which is beside the photo conductive plate, used for diffusing the visible light from the point light source to the lighting method of uniform line light source; a second diffusing top, which is on the bottom of the photo conductive plate, used for diffusing the visible light from the first diffusing top to the lighting method of uniform top light source; a diffusing reflect objective, which is below the photo conductive plate, used for diffusing the light and then reflecting the diffused light to the photo conductive plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.