Light recycling colored light source and method of using
US7083282B1 · kind B1 · utility
14Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2003 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | Mar 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2203/34
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light source for sequential or scrolling displays that recycles otherwise unusable light. The recycling is achieved by reflecting that portion of the light spectrum that will not be used by a pixel back into the light pipe where the light is rehomogenized or redistributed. The rehomogenized or redistributed light may then be used by other pixels that can uses that portion of the light spectrum. The reflection or transmission of the light through a reflective polarizer is controlled by a polarization rotation element that rotates certain portions of the spectrum according to excitation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.