Digital illumination adjusting circuit
US6329766A · kind A · utility
Inventors
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 22, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M5/2576
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A digital illumination adjusting circuit used to adjust the output to a power level of an alternating load via a digital setting manner is disclosed. The digital illumination adjusting circuit includes a microprocessor unit, a power phase detecting circuit, a time base signal generating circuit, a display, and an input pad. The microprocessor unit receives a phase synchronization signal from the power phase detecting circuit, utilizing half cycle of the alternating current power as a counting period, utilizing a time base signal generated from the time base signal generating circuit as counting pulses for the counting period. The microprocessor generates a switch control signal for controlling a conductive angle of the switch circuit which in turn controls the power output to the load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.