Patent ID: 7450095

Claim:
A single-cluster lamp drive device for driving a plurality of light emitting devices in a single-cluster lamp based on a video data, said drive device comprising: a controller for receiving said video data and dividing said video data into a plurality of sub video data for output, said controller including: an outer serial interface for receiving said video data by means of serial data transmission; a serial-to-parallel conversion unit connected to said outer serial interface and used to divide said video data into said plurality of sub video data; a plurality of data latch units connected to said serial-to-parallel conversion unit and used to separately receive said plurality of sub video data; a parallel-to-serial conversion unit connected to said plurality of data latch units and used to convert said plurality of latched sub video data to serial data for output; a digital-to-analog converter connected to said controller and used to convert said sub video data to a plurality of analog voltages for output; and a voltage-to-current converter connected to said digital-to-analog converter and said single-cluster lamp and used to convert said analog voltages to a plurality of analog currents for driving said light emitting devices; whereby said controller repetitively sends said sub video data to said digital-to-analog converter in every fixed time interval to change light emission situations of said light emitting devices.