| 摘要 |
PURPOSE: A thin film micro-mirror array driving circuit is provided to stabilize overall system by supplying stabilized current to each actuator. CONSTITUTION: A driving circuit comprises a plurality of pixel driving blocks(210/1-210/n). The pixel driving block further comprises an A/D converting block(211) for converting an analog unit pixel value into n-bit unit pixel value; counter blocks(212,214,215) for detecting effective video signal section during 1H cycle having a horizontal synchronizing signal, dividing the detected affective video signal section into time intervals corresponding to the maximum value of the n-bit unit pixel value, and generating a clock pulse corresponding to the time intervals; a current supply control block(216) synchronized to the horizontal synchronizing signal, and which generates a switch control signal for supplying a constant current to the corresponding actuator during the time period corresponding to the n-bit unit pixel value in accordance with the n-bit unit pixel value and the clock pulse generated from the counter blocks; a static current source(217) for generating the static current; and a switching block(218) for supplying the static current generated from the static current source to the actuator within the corresponding unit pixel during the time period corresponding to the unit pixel value, in response to the switch control signal generated from the current supply control block.
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