Control circuit and control method for illumination apparatus
US9699845B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 23, 2016 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Jun 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/021
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An error signal generating unit is configured such that (i) in a calibration period, the error signal generating unit is set to a first state in which it amplifies an error signal by amplifying a difference between a predetermined first reference voltage and the lowest one from among multiple first detection voltages, and such that (ii) after the calibration period, the error signal generating unit is set to a second state in which it generates the error signal by amplifying a difference between a second detection voltage and a second reference voltage. A reference voltage setting unit holds, as the second reference voltage, the largest value of the second detection voltage detected in the calibration period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.