POWER SUPPLY CONTROLLER FOR MULTIPLE LIGHTING COMPONENTS

摘要

A power supply controller for a plurality of lighting components (14, 16, 18) in a battery-powered apparatus. The power supply controller (10) comprises a current source (20) common to the lighting components, and a sequencer (22, 24) for coupling the current source (20, 26) sequentially to each of the lighting components (14, 16, 18) with a repetition rate substantially faster than the flicker perception rate. Each of the lighting components (14, 16, 18) comprises a respective array of lighting elements connected in series to receive the same current as the other lighting elements of the same lighting component.