Plasma display apparatus with improvement in supply of sustain voltage
View Patent ↗A plasma display apparatus includes a display panel in which display cells are constituted at least by a set of electrodes including first electrodes extending in a first direction, second electrodes extending in the first direction, and third electrodes extending in a second direction substantially perpendicular to the first direction, a first drive circuit configured to drive the first electrodes, a second drive circuit configured to drive the second electrodes, a third drive circuit configured to drive the third electrodes in conjunction with successive scanning of the first electrodes, and a power-supply circuit configured to generate a DC voltage based on an AC voltage and to supply the DC voltage to the first drive circuit and the second drive circuit, wherein the power-supply circuit and a given drive circuit that is one of the first drive circuit and the second drive circuit are implemented on a single print circuit board.
1. A plasma display apparatus, comprising:
a display panel in which display cells are constituted at least by a set of electrodes including first electrodes extending in a first direction, second electrodes extending in the first direction, and third electrodes extending in a second direction perpendicular to the first direction;
a first drive circuit configured to drive the first electrodes;
a second drive circuit configured to drive the second electrodes;
a third drive circuit configured to drive the third electrodes in conjunction with successive scanning of the first electrodes; and
a power-supply circuit configured to generate a DC voltage based on an AC voltage and to supply the DC voltage to the first drive circuit and the second drive circuit;
a first print circuit board on which the power-supply circuit is implemented;
a second print circuit board on which a given drive circuit that is one of the first drive circuit and the second drive circuit is implemented, wherein the first print circuit board and the second print circuit board are placed side by side and connected via a circuit-board connector;
a first voltage detection circuit implemented on the first print circuit board and configured to detect an output voltage of the power-supply circuit;
a second voltage detection circuit implemented on the second print circuit board and configured to detect the output voltage of the power-supply circuit; and
a switching circuit implemented on the first print circuit board and configured to select one of an output of the first voltage detection circuit and an output of the second voltage detection circuit for provision as a feedback to the power-supply circuit.
2. The plasma display apparatus as claimed in claim 1 , wherein the given drive circuit is a sustain circuit for generating sustain discharge in the display panel, and the power-supply circuit is a power-supply-voltage generating circuit for generating a power-supply voltage for the sustain discharge.