Patent ID: 8169400

Claim:
A drive apparatus for driving a bistable displayer, and said bistable displayer having a plurality of pixels and a plurality of source lines respectively connected to the pixels, and said drive apparatus comprising: an initialization unit connected to the source lines for producing at least one initial potential level signal, which operates independently of a previous displaying image and a desired displaying image, and transmitting said initial potential level signal to all of said pixels through the source lines, said initialization unit producing a pulse signal and sending said pulse signal to all of said pixels through the source lines prior to said initial potential level signal, and said pulse signal comprising a plurality of pulses with a maximum voltage level of Vmax and a minimum voltage level of Vmin, and a reference potential component at a reference voltage level of Vref existing in each transitions between Vmax and Vmin of the plurality of pulses; a receiving unit, arranged for receiving at least one gray level signal; and a display drive unit, arranged for producing a waveform signal based on said gray level signal, and said waveform signal has a pulse width related to the value of said gray level signal, and said display drive unit transmits said waveform signal to a corresponding pixel to drive said pixel to be displayed; wherein, the reference potential component that is transmitted through the source lines is kept at the reference voltage level of Vref for a predetermined period of time that is long enough to eliminate the net DC value remained in said pixels.