Illumination apparatus
US6889456B2 · kind B2 · utility
25Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 28, 2001 |
| Grant date | May 10, 2005 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/009
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An LED light source is received in a groove portion provided in a light guide plate. The groove portion is covered with a base member, and the circumferential edge of the base member is bonded to the light guide plate. Concave portions or convex portions having desired shapes are provided in a surface opposite to a light emission observable surface of the light guide plate so as to form character portions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.