Patent ID: 11930568
Assignee: O2MICRO INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 21:
22. A controller, coupled to a power source, operable for controlling a light source module comprising a first Light-Emitting Diode (LED) array and a second LED array, wherein said first LED array comprises a first plurality of LED strings and said second LED array comprises a second plurality of LED strings, said controller comprising:
a decoding module operable for receiving a timing signal from a timing controller, and for generating a switching signal to control a first switch coupled between a power converter and said first LED array based on said timing signal and to control a second switch coupled between said power converter and said second LED array based on said timing signal; and
a residual image cancelation module, coupled to said decoding module, operable for regulating a voltage across each LED string in said first LED array to below a threshold and for regulating a voltage across each LED string in said second LED array to below said threshold,
wherein said decoding module is operable for turning on said first switch in a first sequence of discrete time slots, and for turning on said second switch in a second sequence of discrete time slots, wherein said first sequence of discrete time slots and said second sequence of discrete time slots are mutually exclusive.