Power on/off system of thin projector and method for controlling the same
US7441903B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2005 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Apr 20, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/3144
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power on/off system of a thin projector including an optical system arranged in a housing with a panel shape having lateral sides and a front side having an area larger than an area of each lateral side is disclosed. The power on/off system includes a door, fans which cool a lamp, a shutter which opens/closes a projection lens, a first sensing unit which senses malfunctions of the lamp, the fans, the door, and the shutter, a second sensing unit which senses an internal temperature of the housing, and a controller which sequentially controls, in response to power-on of the thin projector, operations of opening the door and the shutter, driving the fans, driving the lamp, and sequentially controls, in response to power-off of the thin projector, operations of turning off the lamp, driving the fans, turning off the fans, and closing the door and shutter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.