Integrator module with a collimator and a compact light source and projection display having the same
US7543945B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2004 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jun 7, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/315
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection display includes three illumination units to emit red, green, and blue beams, at least one optical modulator to modulate the red, green, and blue beams to be suitable for image data, and projection optics to magnify and project the light beams emitted from the at least one optical modulator. Each of the illumination units includes: a collimator including a parabolic first reflective surface; a compact light source located at a focal point of the first reflective surface; a polarizer that transforms a light beam emitted from the collimator into a P- or S-polarized beam; and an integrator that transforms the light beam emitted from the polarizer to be emitted at a uniform intensity of light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.