Infrared ray detector control illumination system
US4843283A · kind A · utility
26Cited by
7References
4Claims
0Family size
Inventor
Key dates
| Filing date | Aug 24, 1987 |
| Grant date | Jun 27, 1989 |
| Priority date | — |
| Expiry date | Aug 24, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illumination control system has a plurality of infrared detection systems located in a plurality of adjacent scanning areas. Each of the detection systems controls the activation of light sources located in two or more scanning areas. Each of the detection systems is equipped with an infrared radiation sensor, an ambient light resistor, a timing circuit, a light source driving circuit, and a blinking condition prevention circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.