Illumination system, projection device and color wheel calibrating method
US11422447B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2020 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | Oct 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/204
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An illumination system including a laser light source, a phosphor wheel, a first light detection module, a first light sensing device, and a controller is provided. A first color region boundary is formed between the first and second color regions of the phosphor wheel. The first light sensing component is located downstream of the optical path of the phosphor wheel. During the period in which the first color region is cut into the optical path of the laser beam, the laser beam passes through the first color region and is sensed with first laser beam timing information by the first light sensing component. The controller determines a first displacement value between the first label and the first color region boundary according to the first laser beam timing information and the reference color timing information. A projection device and a color wheel calibrating method are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.