Illumination system having wavelength conversion device and projection device having the same
US11022867B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2019 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Jul 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/2066
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Provided is an illumination system including an excitation light source, a first light splitting element, a first light reflecting element, a wavelength conversion device, and a light filtering device. The excitation light source provides an excitation beam including a first sub-beam and a second sub-beam. The first light splitting element includes a first zone and a second zone. The wavelength conversion device includes an optical zone and a wavelength conversion zone. In a first time period, the first sub-beam is transmitted to the optical zone via the first zone, and the second sub-beam is transmitted to the light filtering device via the first light splitting element and the first light reflecting element. In a second time period, the excitation beam is transmitted to the wavelength conversion zone to be converted into a first conversion beam. Therefore, the structure can be simplified and the size can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.