Illumination device and information processing apparatus
US6375335B1 · kind B1 · utility
19Cited by
11References
66Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1997 |
| Grant date | Apr 23, 2002 |
| Priority date | — |
| Expiry date | Dec 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0055
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light source or LED element is positioned adjacent to an entrance surface of a light guide element of stick shape made of a light transmissive substrate. The light that has entered from the entrance surface to the interior of the light guide element is scattered by a diffusion area to emerge from an exit surface in a predetermined direction, wherein the light that has entered from the entrance surface into the light guide element is not made incident directly on at least a part of the diffusion area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.