Light guide for LCD
US4929062A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1988 |
| Grant date | May 29, 1990 |
| Priority date | — |
| Expiry date | Nov 2, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133615
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display system includes a liquid crystal display, a light guide behind the display, and light emitting diodes. The light guide is a molded slab of clear material with a front display surface a rear surface and six bordering surfaces with two planes depressed into its rear surface and having two hollow half cylindrical extensions integrally molded with closed top and bottom ends. The rear surface and bordering surfaces and outer surface of the extensions are coated with reflective white paint. These extensions receive light from surface mounted LED's which are positioned directly below the extensions to redirect the light into the light guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.