Light conductive plate and plane illuminating apparatus using the same
US5664861A · kind A · utility
2Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 10, 1995 |
| Grant date | Sep 9, 1997 |
| Priority date | — |
| Expiry date | Feb 10, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A light conductive plate used in a side light source type plane illuminating apparatus having a light source arranged on one side portion of a transparent light conductive plate, has a dimming pattern composed of a plurality of curves provided on the back of said light conductive plate. Portions of each of the curves of the dimming pattern located nearer the edge near a light source extend substantially perpendicular to the edge and portions of each of the curves of the dimming pattern located farther from the edge near a light source extend substantially parallel to the edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.