Abstract: A scan IC includes a switch circuit and a logic circuit. The switch circuit includes first and second transistors and a level shift circuit. First and second control signals that change between a logical “1” and a logical “0” are applied to an input terminal of the logic circuit. The logic circuit applies a third control signal to the first transistor and applies a fourth control signal to the second transistor based on the applied first and second control signals. A detection circuit is connected to the input terminal of the logic circuit. An abnormality of the scan IC is detected by the detection circuit.

Abstract: A scan IC includes a switch circuit and a logic circuit. The switch circuit includes first and second transistors and a level shift circuit. First and second control signals that change between a logical “1” and a logical “0” are applied to an input terminal of the logic circuit. The logic circuit applies a third control signal to the first transistor and applies a fourth control signal to the second transistor based on the applied first and second control signals. A detection circuit is connected to the input terminal of the logic circuit. An abnormality of the scan IC is detected by the detection circuit.

Abstract: The plasma display device has the following structure: a panel having a plurality of discharge cells; an electrode-dedicated power supply for generating voltage to be applied to any one of the electrodes disposed on the panel; a driving-waveform generator that has a switching element for outputting voltage of the electrode-dedicated power supply so as to generate a waveform of driving voltage for driving the electrodes; a switch controller for controlling the switching element; a controller-dedicated power supply for supplying the switch controller with electric power; and an auxiliary power supply that generates a voltage lower than that of the controller-dedicated power supply by reducing voltage of the electrode-dedicated power supply so as to supply the switch controller with electric power.