Light source device and projection type image display device
US9648291B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2013 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Jun 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3164
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a light source device where the number of optical components is reduced without lowering an efficiency for light utilization. The light source device includes an excitation light source which generates blue laser light as excitation light, a phosphor wheel including a phosphor which is excited by the excitation light from the excitation light source to generate yellow fluorescent light, and a mirror which guides the excitation light from the excitation light source to the phosphor wheel and transmits the fluorescent light from the phosphor wheel, wherein the mirror includes a first region which reflects the excitation light and transmits the fluorescent light and a second region which transmits the fluorescent light and diffused excitation light which is diffused and reflected in the phosphor. The yellow fluorescent light and the diffused excitation light passing through the mirror are mixed to generate white light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.