Electronic circuit for driving LED strings so as to reduce the light flicker
US9867245B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2017 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Feb 1, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
LED strings cascaded to one another are driven by an electronic circuit that includes regulation modules and a brightness-compensation module. The regulation modules carry out in sequence a current-regulation phase, in which they regulate the current that flows in the corresponding LED strings. The regulation module includes: a compensation regulator coupled to a compensation LED string and to a capacitor and a generator that generates an electrical quantity indicating the luminous flux emitted by the LED strings and by the compensation LED string. The compensation regulator regulates a current that flows in the compensation LED string as a function of the electrical quantity, discharging the capacitor through the compensation LED string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.