Illumination system and projection device
US9977317B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 18, 2017 |
| Grant date | May 22, 2018 |
| Priority date | — |
| Expiry date | Apr 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3158
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illumination system and a projection device are disclosed. The illumination system includes laser light sources, a color wheel element and light combiners. The laser light sources provide laser lights of different colors. One of the laser light sources is disposed on an optical axis. The color wheel element is disposed on the optical axis and on a transmission path of the laser lights, and adjusts wavelengths of the laser lights. The light combiners are disposed on the optical axis and between the laser light source and the color wheel element. The light combiners are pervious to the laser lights or reflect the laser lights to combine the laser lights on the optical axis. The illumination system uses the laser light sources to provide lights of different colors, and in collaboration with a configuration structure of the optical elements thereof, the laser lights with a wider color gamut are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.