Image projection device
US10924716B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2017 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Sep 26, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/011
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image projection device includes: an optical component reflecting an image light beam that has been converted into a substantially parallel light by a lens and scanned by a scanner; a projection mirror irradiating a retina with the reflected image light beam; a light beam blocking unit located on a light path between the scanner and the lens and having an aperture, wherein the projection mirror has a first region and a second region having a larger light condensing power than the first region, and a light condensing power in a third region, reflecting a light beam to be emitted to the first region of the scanned image light beam, of the optical component is greater than that in a fourth region, reflecting a light beam to be emitted to the second region of the scanned image light beam, of the optical component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.