Projector
US7364305B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 6, 2005 |
| Grant date | Apr 29, 2008 |
| Priority date | — |
| Expiry date | Feb 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/006
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A projector which is small in size and excellent in light utilization efficiency while keeping the advantage of a spatially-pixel-arrangement type is provided. The luminous flux emitted from a light source is separated by a color separation system into a plurality of kinds of colors of light different in exit direction. These separated colors of light are modulated by a light valve, to form first optical images. The light valve has a plurality of sub-pixels provided corresponding to the colors of light and micro-lenses to focus the colors of light corresponding to the sub-pixels. The sub-pixels are structured in a size nearly equal to a size of a color of light to be focused on the relevant sub-pixel by micro-lenses. Accordingly, the first optical image is in a form non-analogous with the actual projection image. The first optical images are converted into second optical images having a desired aspect ratio by an anamorphic projection system, and then projected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.