Display panel drive device
View Patent ↗A display panel drive device capable of preventing a malfunction caused by the influence of electrical charge remaining in a display-panel discharge cell, in which, in parallel with a switching element that connects each electrode of the display panel to a reference potential, at least one of a row electrode drive circuit and a column electrode drive circuit is provided with a parallel switching element that connects each electrode to the reference potential via a current limiting element. The residual charge in the discharge cell on the display panel is discharged via a bypass formed by this parallel switching element within a predetermined period immediately after the device power supply is turned on.
1. A display panel drive device, comprising:
a display panel formed by a plurality of row electrode pairs, a plurality of column electrodes arranged to intersect the plurality of row electrode pairs, and capacitive light-emitting elements that are arranged at the respective points of intersection between the row electrode pairs and the column electrodes;
a row electrode drive circuit comprising a switching circuit that selectively connects each of the row electrodes constituting the row electrode pairs to a reference potential; and
a column electrode drive circuit comprising a switching circuit that selectively connects the column electrodes to the reference potential, wherein:
at least one of the row electrode drive circuit and the column electrode drive circuit comprises a bypass switching circuit that is connected in parallel with the switching circuit and selectively forms a bypass for the switching circuit via a current limiting element.
2. The display panel drive device according to claim 1 , wherein the bypass switching circuit forms the bypass within a predetermined period when the power supply of the display panel drive device is turned on.
3. The display panel drive device according to claim 1 , wherein the reference potential is earth potential.
4. The display panel drive device according to claim 1 , wherein the current limiting element is a resistive element.
5. The display panel drive device according to claim 1 , wherein the row electrode drive circuit and column electrode drive circuit each constitute a potential transition circuit based on resonance.