Illumination system for a projection apparatus and projection apparatus
US9057881B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2013 |
| Grant date | Jun 16, 2015 |
| Priority date | — |
| Expiry date | Nov 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N13/363
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An illumination system and a projection apparatus adopting the illumination system are provided. The projection apparatus comprises the illumination system and a light modulator. The illumination system comprises at least one light source, a curved reflecting component, a phosphor wheel, a polarizer and a half wave retarder. The light provided by the at least one light source passes through the curved reflecting component and the phosphor wheel to provide a first light in a first time sequence and a second light in a second time sequence. The first light and the second light are transformed into a first polarized light and a second polarized light respectively in different time sequences by the polarizer and the half wave retarder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.