Optical scanner, laser image projector adopting the optical scanner, and method of driving the laser image projector
US6636339B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 4, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | May 8, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3129
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical scanner, a laser image projector using the optical scanner, and a method of driving the laser image projector are provided. The optical scanner includes: a base substrate; a plurality of parallel stationary comb electrodes arranged on the base substrate extending upwards at right angle; a stage having a mirror side at its top side, being separated a predetermined distance above the base substrate; a plurality of parallel driving comb electrodes arranged on the bottom of the stage extending at right angle interdigitated with the stationary comb electrodes; torsion bars formed at both side edges of the stage with a predetermined length to support such that the stage pivots; and supports for supporting the torsion bars such that the stage is suspended above the base substrate. The laser image projector includes the optical scanners using micro mirrors, instead of a horizontal scanning rotating polygonal mirror and a vertical scanning galvanometer, and is driven such that a single horizontal left-to-right scanning is followed by another right-to-left horizontal scanning without redundant flyback interval. Therefore, comparing with a driving method which needs quick returning…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.