Light state regulation controller, control system and control method
US10306730B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2018 |
| Grant date | May 28, 2019 |
| Priority date | — |
| Expiry date | Jun 15, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/30
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a light state regulation controller, control system and control method. The controller comprises a peak current comparator, a PWM controller, a power switch, a state detector and a state machine. The peak current comparator produces a PWM turn-off signal according to a comparison result between a peak current sampling signal and a reference voltage. The PWM controller outputs a PWM control signal and the reference voltage under the control of the PWM turn-off signal and a state control signal, wherein the state control signal controls the state of the PWM control signal. The state detector detects a state change in the PWM control signal or an equivalent signal for the PWM control signal, and outputs a state input signal. The state machine produces a plurality of states according to the state input signal, and outputs the state control signal reflecting the plurality of states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.