Patent ID: 8659542

Claim:
A driving circuit for driving an electronic paper, the electronic paper comprising a plurality of display units driven from a previous gray level to a target gray level by a first pulse and a second) pulse during a program phase, wherein the plurality of display units respectively comprising a data node and a common node, and the driving circuit comprising: a common terminal, coupled to the common nodes of the plurality of display units; a common driver, coupled to the common terminal, for providing a predetermined DC voltage to the common terminal during the program phase; and a plurality of driving unit, each of the driving units comprising: a data terminal, coupled to one of the data nodes of the plurality of display units; a data driver, coupled to the data terminal, for providing the first pulse and the second pulse to the data terminal, wherein a peak voltage of the first pulse is different from a peak voltage of the second pulse; and a switch, coupled to the data terminal, wherein the switch does not conduct during the first pulse and the second pulse, and the switch conducts the data terminal to a middle voltage between the first pulse and the second pulse, wherein the middle voltage is between the peak voltages of the first pulse and the second pulse, and a switch controller, coupled to the switch, for comparing whether a difference between the peak voltages of the first pulse and the second pulse is greater than a threshold voltage, wherein when the difference is greater than the threshold voltage, the switch controller conducts the switch so the switch conducts the data terminal to the middle voltage between the first pulse and the second pulse, otherwise, the switch controller does not conduct the switch.