Patent ID: 7301519
Filing Date: 2007-11-27
Classification: G09G

Abstract:
1. A liquid crystal display driver comprising: a driving voltage generating circuit for generating first through fifth driving voltages and outputting the generated voltages via first through fifth output terminals; a common/segment driving circuit, controlled by a driving polarity signal that is applied to the common/segment driving circuit, for receiving the first through fifth driving voltages to generate a common driving signal and a segment driving signal; a first capacitor connected between the first output terminal and a ground voltage; a second capacitor; a third capacitor; and a control circuit comprising a plurality of switches for controlling connection of the output terminals and the capacitors in response to the driving polarity signal, wherein each switch of the plurality of switches is controlled by the driving polarity signal, and wherein the capacitors are selectively connected to driving voltages used by the common/segment driving circuit, but not to driving voltages not used by the common/segment driving circuit, according to a logic state of the driving polarity signal; wherein the control circuit comprises: