Patent ID: 9578704
Date: 2017-02-21
CPC Classifications: B23K,H05B

Claim:
1. A control apparatus for a lighting apparatus, the control apparatus comprising: a voltage converter operable to generate an output voltage defined between a high voltage rail and a low voltage rail coupled to the output of the voltage converter, the output voltage based at least partially on a voltage control signal received by the voltage converter, the voltage control signal being high for one or more time slots and low for one or more time slots within each of a plurality of timing blocks within a fine control period; and a control module operable to: wherein the first number of time slots within each of the first timing blocks and the second number of timing slots within each of the second timing blocks have similar relative magnitudes, whereby the duty cycle across the fine control period has an average value between the first and second values to provide an increased resolution to control the output voltage from the voltage converter.