Patent ID: 7928953

Claim:
A display driver circuit for driving a display panel, the driver circuit including: an input terminal to which an input voltage exhibiting a positive polarity or a negative polarity is supplied; an output terminal for outputting a first output voltage to a vertical line of the display panel, wherein: the driver circuit is configured to operate in: an output mode in which the output terminal is disconnected from another output terminal outputting a second output voltage to another vertical line of the display panel, the second output voltage having a polarity opposite to a polarity of the first output voltage and in which the first output voltage is output in response to the input voltage; and a transition mode in which the output terminal and said another output terminal are connected to each other and during which the polarity of the input voltage is inversed, the display driver circuit further comprises: a differential amplification part having a first input node connected to the input terminal, a second input node, and a first output node for outputting a first voltage, the first voltage corresponding to a difference in voltages supplied to the first and second input nodes; a first capacitance element connected between a first supply node connected to the first output node of the differential amplification part and an intermediate node connected to the second input node of the differential amplification part; an output part having an input-output node, a first driving transistor connected between a first reference node and the input-output node, a second driving transistor connected between the input-output node and a second reference node, the output part supplying an output current generated by the first and second driving transistors to the intermediate node and the output terminal through the input-output node, a first supply switch connected between the first supply node and a third reference node, the first supply switch being turned off in the output mode and turned on in the transition mode, and a supply switch part for causing the output part to execute supply of the output current to the output terminal in the output mode and causing the output part to discontinue the supply of the output current to the output terminal in the transition mode, wherein, in the transition mode, the driver circuit is configured to distribute charges of the first capacitance element to the another output terminal through the output terminal so that a voltage of the output terminal becomes equal to a voltage of the another output terminal.