Illumination system and display device
US6854854B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2002 |
| Grant date | Feb 15, 2005 |
| Priority date | — |
| Expiry date | May 18, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/0033
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A backlight system includes at least first and second light-emitting panels (1; 11) having a front wall (2; 12), an opposing rear wall (3; 13) and opposite edge surfaces (4, 14; 5, 15). At least one of the edge surfaces (4; 14) is light-transmitting and associated with a light source (6; 16). Light originating from the light source is diffused in the light-emitting panels and coupled out of the light-emitting panels in the direction of a display device (25), preferably a LCD device. The light source associated with the first light-emitting panel (1) has clusters of red and blue or red and green LEDs. The light source (16) associated with the second light-emitting panel (11) has clusters of blue and green LEDs or only green LEDs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.