Patent ID: 7916112

Claim:
A system for controlling a first pixel, the first pixel being operative to receive a first data signal, said system comprising: a scan driver comprising: a first shift-register unit operative to output a first shift signal according to a first start signal; a second shift-register unit operative to output a second shift signal according to the first shift signal for lighting the first pixel; a third shift-register unit operative to output a third shift signal according to the second shift signal; and a first processor operative to control the first pixel to receive the first data signal according to the first, the second, and the third shift signals, wherein the first processor comprises: a first logic unit comprising a first input terminal operative to receive the first shift signal, a second input terminal operative to receive the second shift signal and a first output terminal, wherein the first output terminal outputs a first logic level when a logic level of the first shift signal equals that of the second shift signal and the first output terminal outputs a second logic level when the logic level of the first shift signal differs that of the second shift signal; and a second logic unit comprising a third input terminal coupled to the first output terminal, a fourth input terminal operative to receive the third shift signal, and a second output terminal coupled to the first pixel, wherein the second output terminal outputs the first logic level when the logic level of the first output terminal of the first logic unit or a logic level of the third shift signal equals the first logic level and the second output terminal outputs the second logic level when the logic level of the first output terminal of the first logic unit and the logic level of the third shift signal equal the second logic level; wherein a duty cycle of the first start signal determines a light-emitting duration of the first pixel.