Keystone correction system and method
US6962417B1 · kind B1 · utility
16Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2004 |
| Grant date | Nov 8, 2005 |
| Priority date | — |
| Expiry date | Jan 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2370/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a keystone correction system and method. The system includes a projector for projecting an image on a projection surface and a platform to allow a user to vertically rotate the projector before horizontally rotating the projector. The projector corrects for keystone distortion responsive to the projector's vertical and horizontal position. The platform increases the keystone range of the projector. The keystone correction method includes moving a projector in a vertical direction and moving a projector in a horizontal direction after moving the projector in a vertical direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.