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US 2019/0104589 A1Published application
Dimmable led driver and dimming method
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsLongqi Wang, Jianxin Wang
Life of this patent
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Abstract
A dimming signal conversion method can include: converting a dimming voltage to a PWM signal; adjusting a corresponding relationship between the dimming voltage and a duty cycle of the PWM signal according to brightness requirements of a LED light source; and generating a drive current of an LED driver based on the corresponding relationship.
Claims20
A dimming signal conversion method, comprising:
- a) converting a dimming voltage to a pulse-width modulation (PWM) signal;
- b) adjusting a corresponding relationship between said dimming voltage and a duty cycle of said PWM signal according to brightness requirements of a light-emitting diode (LED) light source;
- and
- c) generating a drive current of an LED driver based on said corresponding relationship.
1 more element
A signal conversion circuit for a light-emitting diode (LED) driver, the signal conversion circuit comprising:
- a) a voltage conversion circuit configured to convert a dimming voltage to a conversion voltage;
- b) a pulse-width modulation (PWM) signal generating circuit configured to receive said conversion voltage, and to generate a PWM signal;
- and
- c) wherein a corresponding relationship between said dimming voltage and said conversion voltage is adjustable according to brightness requirements of an LED light source, in order to generate a drive current of said LED driver.
1 more element
Dependencies are inferred from the claim text.