Projection lens shifting mechanism
US6547402B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 1, 2002 |
| Grant date | Apr 15, 2003 |
| Priority date | — |
| Expiry date | Apr 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The projection lens shifting mechanism is for locating the projected picture at a desired position on the screen by shifting the projection lens with respect to the display surface of the display device, including a base plate secured to the housing of the projection lens shifting mechanism and having a guide surface parallel to the display surface, a moveable plate rigidly holding the projection lens and movable in a prescribed direction parallel to the display surface guided by the guide surface, a holding plate linked to the moveable plate through elastic members, constituting, together with the moveable plate, an elastic clamp structure that holds the base plate and elastically clamps the base plate. When an external force works against the elastic force to release this clamp, the holding plate can move integrally with the moveable plate in a direction parallel to the guide surface of the base plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.