Microdisplay projection
US7241014B2 · kind B2 · utility
10Cited by
16References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2004 |
| Grant date | Jul 10, 2007 |
| Priority date | — |
| Expiry date | Mar 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for forming two orthogonally polarized beams of light from an unpolarized beam of light using one of at least two different image modes, the forming includes a color filtering process that is based on the image mode being used, and projecting the two orthogonally polarized beams to form an image on a viewing surface. Methods and apparatus for separating an unpolarized light beam into four beams as a function of wavelength and polarization; selectively modulating the four beams respectively using four light valves; and combining the four modulated beams to generate two orthogonally polarized light beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.