LED driver headroom voltage control systems and methods
US10269307B2 · kind B2 · utility
3Cited by
1References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2017 |
| Grant date | Apr 23, 2019 |
| Priority date | — |
| Expiry date | Aug 22, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Aspects of the subject technology relate to control circuitry for operating light-emitting diodes (LEDs). The control circuitry may include a pulse-width-modulation (PWM) driver for the LEDs and headroom voltage control circuitry. The PWM driver may adjust a rising edge or a trailing edge of the PWM cycles for various LEDs to ensure a headroom voltage detection window for the headroom voltage control circuitry to sample the headroom voltage of those LEDs without being affected by the rising edge of the PWM cycle for LED or the falling edge of the PWM cycle for another LED.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.