Full color rear screen projection system using a single monochrome TFT LCD panel
US6637888B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 2002 |
| Grant date | Oct 28, 2003 |
| Priority date | — |
| Expiry date | Jan 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3167
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A rear screen projection system uses a single monochrome liquid crystal display (LCD) panel for displaying full color images. In one embodiment, an apparatus for projecting an image includes an illumination source generating polarized light beams in three different primary colors, a monochrome liquid crystal display panel including a two-dimensional array of addressable pixels, the array of addressable pixels is divided into multiple image areas, and a projection lens assembly for aligning and projecting the images generated by the multiple image areas of the liquid crystal display panel to form a full color image. In one embodiment, the illumination source includes a light source emitting randomly polarized white light, a polarizing element coupled to receive the randomly polarized white light and generate a polarized white light beam, and color separating elements for separating the polarized white light beam into the polarized light beams in three different primary colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.