Projector
US7322701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 2, 2005 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | May 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/74
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To provide a projector having a configuration for reflecting correction by lens shift on keystone correction and preferentially using a lens shift function. The projector includes a keystone correcting portion for applying keystone correction to an input image signal, a display device for displaying an image in accordance with an output signal of the keystone correcting portion, a projection lens for projecting the image displayed on the display device to a screen, a lens driving portion for moving the projection lens and outputting the position information on the projection lens, and a control portion for outputting parameters used for keystone correction and the position information on the lens, in which the control portion determines whether the moving distance of the lens reaches a limit value, receives a keystone adjusting signal for changing the parameters used for keystone correction and receives a keystone adjusting signal for changing parameters used for keystone correction and outputs the signal only when the moving distance reaches the limit value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.