Polarized light emitting diode (LED) color illumination system and method for providing same
US7325957B2 · kind B2 · utility
17Cited by
11References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2005 |
| Grant date | Feb 5, 2008 |
| Priority date | — |
| Expiry date | May 24, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A polarized light illumination system includes a light emitting diode (LED) (601, 602, 603) for providing a source of light that is directed to a non-polarizing dichroic combiner (607) for combining light from the LEDs into a single light source. A power beam splitter (PBS) (608) is then used for splitting the single light source into polarized light components and an output waveguide (611) operates to provide a source of uniformly illuminated light. A condenser lens (612) then projects the uniformly illuminated light to a microdisplay panel (613) for use with a television receiver or other type of display monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.