Automatic video convergence system
US5258830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1992 |
| Grant date | Nov 2, 1993 |
| Priority date | — |
| Expiry date | Oct 19, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/28
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An automatic convergence system for correcting misregistration of component color images in a projection video display unit. The system comprises control circuitry for generating target characters onto a projection surface, and a locator assembly for aiming a photosensor array at the displayed target images by means of a pair of stepper motors. The photosensor array detects the position of the target images and conveys this information to a microprocessor which in response calculates appropriate correction signals for application to vertical and horizontal convergence coils of the display system for effecting convergence of the component color images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.