Controller, light source driving circuit and method for controlling light source module
US10537000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2019 |
| Grant date | Jan 14, 2020 |
| Priority date | — |
| Expiry date | Apr 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A controller includes a current input terminal, a switch monitoring terminal, a first control terminal, a second control terminal and a current monitoring terminal. The current input terminal is coupled to a power source through a rectifier and receives electric power from the power source. The switch monitoring terminal is coupled to a power switch and receives a switch monitoring signal indicating the on/off state of the power switch. The power switch is coupled between the rectifier and the power source. Based on the switch monitoring signal, the first control terminal turns on or turns off a first light source in a light source module and the second control terminal turns on or turns off a second light source in the light source module. The current monitoring terminal monitors a current flowing through the first light source and a current flowing through the second light source.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.