Compact optical wave-guide system for LED backlighting liquid crystal displays
US6419372B1 · kind B1 · utility
48Cited by
14References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Dec 20, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133626
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Disclosed are a flat panel display and a backlight which provides both night vision and day mode backlighting of the flat panel display. The backlight of the flat panel display includes a circuit card and day mode light emitting diodes (LEDs) positioned coplanar with each other on the circuit card. Night vision (NVIS) LEDs are positioned on the circuit card coplanar with the day mode LEDs. An optical wave-guide is positioned in front of the day mode LEDs and the NVIS LEDs and is adapted to distribute light from the day mode LEDs and from the NVIS LEDs forward away from the LEDs and the circuit card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.