Self-correcting rear projection television
US7227592B2 · kind B2 · utility
9Cited by
16References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2003 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Sep 1, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/7408
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a rear projection television, cathode ray tubes are mounted inside an enclosure so that each cathode ray tube projects output images onto a rear projection screen using a corresponding electron beam. Calibration images are generated for each cathode ray tube. A camera, also mounted inside the enclosure, acquires an input image of each calibration image. A distortion in each input image is measured, and the output images of the cathode ray tubes are corrected by adjusting the signals controlling the corresponding electron beams according to the distortion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.