Switching control circuit and LED driving circuit using the same
US11317488B2 · kind B2 · utility
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24Claims
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Assignee
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Key dates
| Filing date | Apr 12, 2021 |
| Grant date | Apr 26, 2022 |
| Priority date | — |
| Expiry date | Apr 12, 2041 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/40
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switching control circuit configured to turn on a driving switching element by providing a gate signal to the driving switching element connected in series to an LED includes the switching control circuit configured to divide a PWM dimming signal into a normal PWM dimming section and a low PWM dimming section based on a timing selection signal, provide the gate signal of a first frequency to the driving switching element in the normal PWM dimming section, and provide the gate signal of a second frequency, greater than the first frequency, in the low PWM dimming section.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.