Movie projection system
US7884716B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 2008 |
| Grant date | Feb 8, 2011 |
| Priority date | — |
| Expiry date | Apr 3, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a movie projection system, a switch circuit is disposed on a door of a case in which a video server is disposed. A tamper detector detects a state of the door as to whether the door is open or not and a state of the switch circuit as to whether the switch circuit has been tampered with or not, on the basis of an output signal provided by the switch circuit. A projecting operation controller controls the operation of the movie projection system such that when the door is detected to be in the open state or the switch circuit is detected to have been tampered with, the projecting operation controller stops inputting and outputting video data to or from the video server.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.