Driving method and driving circuit of plasma display panel

A driving method of a plasma display panel, comprising:

• providing a reset period to equalize charge of all discharge cells prior to a display period to light respective discharge cells in accordance with a gradation;
• and
• supplying a current from a constant current circuit to one of the discharge cells in the reset period to apply an increasing voltage to a pair of display electrodes, wherein the supply of the current from the constant current circuit is performed intermittently in accordance with a quantity of a display load in the display period.

A driving circuit applying an increasing voltage to a pair of display electrodes, in succession for each of plural pairs of display electrodes and respective discharge cells in a reset period to equalize charge of all discharge cells of a plasma display panel, when displaying by the plasma display panel including plural discharge cells, each of which is lightable by a discharge between a respective pair of display electrodes, the driving circuit comprising:

• a constant current circuit including a current limiting resistor and a semiconductor switching device, supplying a current from a power source through the current limiting resistor to one of the pair of display electrodes;
• and
• an auxiliary charging circuit including a capacitance element and a switching device making and breaking a conductive path between the capacitance element and the constant current circuit.

A driving circuit applying an increasing voltage to a pair of display electrodes, in succession for each of plural pairs of display electrodes and respective discharge cells in a reset period to equalize charge of all discharge cells of a plasma display panel provided prior to a display period to light the respective discharge cells in accordance with a gradation when displaying by the plasma display panel including plural discharge cells, each of which is lightable by a discharge between a respective pair of display electrodes, the driving circuit comprising:

• a constant current circuit including a current limiting resistor and a semiconductor switching device, supplying a current from a power source through the current limiting resistor to one of the pair of display electrodes;
• and
• a control circuit switching the semiconductor switching device in accordance with a quantity of a display load in the display period.

A driving method of a plasma display panel, comprising:

• in a reset period, applying a ramp voltage to a pair of display electrodes to generate a micro-discharge in discharge cells by supplying an output current from a constant current circuit to the discharge cells, in succession for each of plural pairs of display electrodes and respective discharge cells, wherein
• during bias periods within the reset period, selectively connecting in parallel and disconnecting a capacitance element and the discharge cells to distribute the output current of a constant magnitude, when selectively connected, from the constant current circuit to the parallel-connected capacitance element and discharge cells.

A driving circuit for a plasma display panel including a plurality of discharge cells, each discharge cell having a pair of display electrodes, wherein a ramp voltage is applied to the pair of display electrodes for each pairs of display electrodes in a reset period to equalize charge in all of the discharge cells of the plasma display panel, one or more discharge cells being lit in a display period when displaying by the plasma display panel in accordance with a gradation, each of the one or more discharge cells being lit by a discharge between a respective pair of display electrodes, comprising:

• a constant current circuit including a current limiting resistor and a switching device to supply a current through the current limiting resistor to one of the pair of display electrodes;
• and
• a control circuit switching the switching device in accordance with a quantity of a display load in the display period.