Optocoupler dimmer circuit for high intensity, gaseous discharge lamp
US4197485A · kind A · utility
22Cited by
6References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1978 |
| Grant date | Apr 8, 1980 |
| Priority date | — |
| Expiry date | Jul 24, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S315/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A dimmer circuit for a high intensity, gaseous discharge lamp having a ballast with a reactive portion, the current bypass or partial bypass of which determines the brightness of the lamp, the bypass being controlled by gated bypass means, preferably in the form of a triac, driven by the photodrive element of an optocoupler, the light emitting diode element of the optocoupler receiving pulses and actuating the photodrive element for passing a gate trigger signal to the gated bypass means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.