Solid-state light source dimming system and techniques
AssigneeLedvance GmbH
InventorsShiyong Zhang, Aaron Ganick
Life of this patent
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Abstract
A device controls the dimming of a solid-state light source. The device includes a microcontroller configured to receive a rectified phase-cut signal. The microcontroller is configured to measure, within a given period, a duration of a low state of the rectified phase-cut signal and output a low value based thereon. The microcontroller is also configured to measure, within the given period, a duration of a high state of the rectified phase-cut signal and output a high value based thereon. The microcontroller generates an output signal based on at least one of the low value and the high value.
Claims18
A device for controlling the dimming of a solid-state light source, the device comprising:
- a microcontroller configured to receive a rectified phase-cut signal, wherein the microcontroller is configured to:
- measure, within a given period, a duration of a low state of the rectified phase-cut signal and output a low value based thereon;
- measure, within the given period, a duration of a high state of the rectified phase-cut signal and output a high value based thereon;
- and
- generate an output signal based on at least one of the low value and the high value.
A method of controlling light output of a solid-state light source, the method comprising:
- measuring a duration of each of a low state and a high state of a rectified phase-cut signal and outputting a corresponding low value and high value, respectively;
- generating a pulse-width modulation (PWM) signal based on each of the low value and the high value of the rectified phase-cut signal;
- and
- generating at least one direct current (DC) power based on the PWM signal and supplying the at least one DC power to the solid-state light source.
Dependencies are inferred from the claim text.