Patent ID: 8049683

Claim:
A driving circuit of a display panel for driving a first electrode of the display panel in which the first electrode and a second electrode arranged to cross each other, comprising: a first current mirror circuit formed by connecting a gate of a first FET and a gate of a second FET; a current detecting resistor connected to a drain of the first FET, for detecting a magnitude of the current flowing in the first FET; a differential amplifier having an output end connected to a gate of the first FET, a positive input end connected to a connection node between the first FET and the current detecting resistor, and a negative input end to which a current control signal for controlling a magnitude of the current flowing in the first FET is inputted; a second current mirror circuit formed by connecting a gate of a third FET connected in series to the second FET to a gate of a fourth FET; an analog switch device connected in series to the fourth FET and the first electrode; and a cathode address control unit for controlling the analog switch device to be a conductive state or a non-conductive state.