Patent ID: 8390612

Claim:
A source driver, comprising: a first data channel configured to latch a first pixel data according to a timing of a line latch signal and convert the latched first pixel data to a first driving signal for driving a display panel, wherein the first data channel determines a polarity of the first driving signal according to a polarity signal; a first switch having a first end coupled to the first data channel to receive the first driving signal; and a switch controller receiving the line latch signal and the polarity signal, and adjusting a pulse width of the line latch signal according to the polarity signal, so as to obtain a control signal to control the first switch, wherein the control signal can be the line latch signal, or the control signal can be a wide pulse signal obtained by adjusting the line latch signal according to the polarity signal such that a width of a first pulse of the wide pulse signal is smaller than a width of a second pulse of the wide pulse signal after the polarity signal is changed, the switch controller decides the control signal to be the line latch signal or the wide pulse signal according to the polarity signal.