PWM dimming with reduced audible noise
US10728982B2 · kind B2 · utility
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1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2019 |
| Grant date | Jul 28, 2020 |
| Priority date | — |
| Expiry date | Jan 18, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/325
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Method and device for PWM dimming of an LED lamp. The LED lamp comprises one or more LEDs and an LED lamp driver for operating the LEDs. The method comprises: generating a PWM signal; and supplying the PWM signal to the LED lamp driver; wherein the PWM signal comprises a mixture of two or more different frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.