LED driver gate clamp systems and methods
US10129941B1 · kind B1 · utility
3Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2017 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Aug 30, 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 display circuitry such as backlight control circuitry for operating light-emitting diodes (LEDs). The backlight control circuitry may include a pulse-width-modulation (PWM) transistor and a current regulation transistor coupled in series with at least one LED. The current regulation transistor may have a gate terminal that receives a feedback-controlled gate voltage. The backlight control circuitry may include a gate clamp circuit coupled to the gate terminal of the current regulation transistor that clamps the gate voltage during a portion of a PWM on pulse.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.