Light source device and projection display device
US10459324B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 21, 2018 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Sep 21, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B33/08
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The light source device includes a laser for generating laser light, a fluorescent wheel, a filter wheel and a control unit. The fluorescent wheel includes a reflection section, and a transmission section. First and second phosphors are attached on a surface of the reflection section, and the first phosphor is excited by the laser light to emit yellow light and the second phosphor is excited by the laser light to emit green light. The filter wheel comprises a transparent section, a red filter section and a green filter section. The control unit controls the fluorescent wheel and the filter wheel to rotate in synchronization. the laser light emitted from the transmission section of the fluorescent wheel and a part of the yellow light enter into the transparent section, another part of the yellow light enter into the red filter section, and the green light enter into the green filter section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.