Split phosphor/slit color wheel segment for color generation in solid-state illumination system
US9470886B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2014 |
| Grant date | Oct 18, 2016 |
| Priority date | — |
| Expiry date | May 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/204
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Apparatus for generating blue color illumination for use in a projection system a color wheel with segments of respective different color light emitting phosphors formed over light non-transmitting portions and at least one blue color generating segment. The blue color generating segment has cyan color light emitting phosphor formed over a light non-transmitting first portion and a second portion that transmits blue laser light through the wheel. A dichroic filter directs blue laser light from a light source onto the respective segments as the color wheel rotates. The light strikes the first and second portions of the blue color generating segment to generate blue light at a color point determined by both blue laser light and phosphor emitted cyan light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.