Method and device for driving plasma display panel

A device for driving an AC type plasma display panel in which a voltage pulse train is applied to a display electrode pair so that display discharge is generated plural times in accordance with luminance of image to be displayed, the device comprising;

• a normal pulse generating circuit for applying a sustain voltage intermittently to the display electrode pair;
• an auxiliary pulse generating circuit for applying an auxiliary voltage intermittently to the display electrode pair;
• an impedance conversion circuit for reducing an output impedance of the auxiliary pulse generating circuit to the display electrode pair;
• and
• a controller for applying the auxiliary voltage during the application of the sustain voltage and for controlling the normal pulse generating circuit and the auxiliary pulse generating circuit so that the application of the sustain voltage continues after stopping the application of the auxiliary voltage for a constant period.

A device for driving an AC type plasma display panel in which a voltage pulse train is applied to a display electrode pair so that display discharge is generated plural times in accordance with luminance of image to be displayed, the device comprising;

• a normal pulse generating circuit for applying a sustain voltage intermittently to the display electrode pair,
• an offset drive pulse generating circuit for applying an offset drive voltage that is the sustain voltage plus an auxiliary voltage to the display electrode pair intermittently;
• an impedance conversion circuit for reducing output impedance of the offset drive pulse generating circuit to the normal pulse generating circuit;
• a diode for forming a forward direction electric path between the impedance conversion circuit and the normal pulse generating circuit;
• and
• a controller for applying the auxiliary voltage during the application of the sustain voltage and for controlling the normal pulse generating circuit and the offset drive pulse generating circuit so that the application of the sustain voltage continues after stopping the application of the auxiliary voltage for a constant period.