Projector including color filters
US11966152B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2019 |
| Grant date | Apr 23, 2024 |
| Priority date | — |
| Expiry date | Feb 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projector comprises: a light source that projects laser light; a first color filter including a reflective portion reflecting the laser light emitted from the light source, and a transmissive portion transmitting the laser light; a phosphorus plate that converts the laser light reflected from the first color filter into phosphorescent light; a second color filter including color films of different colors through which the phosphorescent light transmits; and a display element that is provided with the laser light transmitted from the first color filter and the phosphorescent light transmitted through the second color filter so as to project an image, wherein the projector can be reduced in volume since the number of lenses used in an optical system can be reduced by shortening an optical path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.