Driver circuit for LEDs for time-of-flight calculation
US9847736B2 · kind B2 · utility
8Cited by
6References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2012 |
| Grant date | Dec 19, 2017 |
| Priority date | — |
| Expiry date | Jul 12, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electronic driver circuit for LEDs and LASERs is provided for use in time-of-flight applications featuring a high efficiency of energy-conversion and a high precision of distance-measurements based on a dual conversion circuit. A voltage to voltage DC-DC conversion is hereby merged with a DC-voltage to pulsed-current booster, this booster operating at a time-of-flight modulation frequency. At the start of a new measurement cycle, the PWM signal for driving the DC-DC conversion is updated in response to currents observed during previous illumination periods.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.