Surface light source device and liquid crystal display assembly using the same
US6882382B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 30, 2003 |
| Grant date | Apr 19, 2005 |
| Priority date | — |
| Expiry date | May 30, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surface light source device includes a light guide plate which guides light upward and downward, a light quantity adjustment unit which is provided on at least one of top and bottom surfaces of the light guide plate and adjusts the quantity of light above the light guide plate to be different from that below the light guide plate, an emitting device which is provided to at least one side of the light guide plate, and diffusion plates which are respectively installed at the top and bottom surfaces of the light guide plate. By adjusting the quantities of light radiated above and below the light guide plate, the brightness of an image can be easily adjusted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.