Projection device and use method thereof
US12174521B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 13, 2022 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Feb 16, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/005
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projection device, including an illumination light source, an electrochromic module, at least one light valve, and a projection lens, is provided. The illumination light source provides an illumination beam. The electrochromic module is disposed on a transmission path of the illumination beam. The electrochromic module includes at least one electrochromic element, and sequentially maintains or filters the illumination beam to provide a plurality of color beams. The at least one light valve is disposed on the transmission path of the color beams transmitted by the electrochromic module to convert each of the color beam into an image beam. The projection lens is disposed on a transmission path of the image beam to project the image beam out of the projection device. The projection device and the use method thereof provided by the disclosure may filter the color light output or the color space of a display image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.