Plasma display apparatus
View Patent ↗A plasma display apparatus, in which the supply of a sustain pulse can be controlled for each display line and power consumption can be reduced by terminating the supply of the sustain pulse to the display line in the non-display area, has been disclosed. In this plasma display apparatus, a switch circuit is provided respectively on each wiring path of the sustain pulse to each electrode of a first electrode (X electrode) and a second electrode (Y electrode) and it is possible to control whether or not to supply the sustain pulse for each electrode.
1. A plasma display apparatus, comprising:
a display panel that has first electrodes and second electrodes arranged adjacent to each other and third electrodes that intersect the first electrodes and the second electrodes, display pixels being formed at the intersections;
an X drive circuit that drives the first electrodes;
a Y drive circuit that drives the second electrodes, wherein the Y drive circuit comprises:
plural line drive switches respectively arranged in correspondence with said second electrodes, each line drive being composed of a pair of a high-side switch that supplies a high-potential side pulse to each of the second electrode and a low-side switch that supplies a low-potential side pulse to each of the second electrode,
a first power source switch that switches the voltages to be supplied to the terminal of the high-side switch between that which corresponds to the scan pulse and that which corresponds to the sustain pulse, and
a second power source switch that switches the voltages to be supplied to the terminal of the low-side switch between that which corresponds to the scan pulse and that which corresponds to the sustain pulse,
the supply of the scan pulse and the sustain pulse to the second electrodes being controlled by switching the plural line drive switches; and
a display area detection circuit which detects a non-display area, in which no display pixel to be lit on the first electrode and the second electrode exists, and a display area, in which at least one display pixel to be lit on the first electrode and the second electrode exists in the display area of the display panel, the Y drive circuit, further, controlling the plural line drive switches so that the sustain pulse is not supplied to the second electrode in the non-display area.
2. A plasma display apparatus as set forth in claim 1 , wherein the Y drive circuit controls the plural line drive switches so that the scan pulse is also not supplied to the second electrode in the non-display area.
3. A plasma display apparatus as set forth in claim 1 , wherein the Y drive circuit comprises a reset power source switch that switches the voltage to be supplied to the terminals of the high-side switch and the low-side switch to that which corresponds to a reset pulse, and the Y drive circuit controls the plural line drive switches so that the reset pulse is not supplied to the second electrode in the non-display area.
4. A plasma display apparatus as set forth in claim 1 , wherein the X drive circuit comprises plural X line drive switches composed of an X high-side switch that supplies a high-potential side pulse to each of the first electrode and an X low-side switch that supplies a low-potential side pulse to each of the first electrode and an X power source switch that switches the voltages to be supplied to the terminals of the high-side switch and the low-side switch between that which corresponds to the sustain pulse and that which corresponds to the reset pulse, the supply of the sustain pulse and the reset pulse to the first electrode is performed by controlling the plural X line drive switches, and it is possible to control whether or not to supply the sustain pulse and the reset pulse to each of the first electrodes.
5. A plasma display apparatus as set forth in claim 4 , wherein the X drive circuit controls the plural X line drive switches so that the sustain pulse is not supplied to the first electrode in the non-display area.
6. A plasma display apparatus as set forth in claim 5 , wherein the X drive circuit comprises an X reset power source switch that switches the voltage to be supplied to the terminals of the X high-side switch and the X low-side switch to that which corresponds to a reset pulse, and the X drive circuit controls the plural X line drive switches so that the reset pulse is not supplied to the first electrode in the non-display area.