Method of transmitting video signals, and picture-transmission system for field-of-operation illuminating fixtures
US5808680A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1996 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Feb 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/804
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A field-of-operation illuminating fixture with a video camera in the vicinity of a lamp housing for displaying the field. The video signals emitted by the camera are forwarded along with signals for controlling the camera over the same cable that transmits power to the lamps. The cable extends through the mechanism that the housing is suspended from, such as being extended from a ceiling. The cable is in sections connected by rotating contacts in the form of slip rings at the articulations between a suspension boom and arms. Video signals and camera-control signals are modulated before entering the cable by a module in the ceiling-mounted base of the fixture and are demodulated in another module after leaving the cable. The video signals are processed in a separate accessory. The present invention provides a cost-effective design for a field-of-operation illuminating fixture equipped for video and simple modification of fixtures already equipped therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.