Data electrode drive apparatus having a resonance circuit for a display panel

摘要

A display panel includes row and column electrodes. Capacitive light-emitting elements are provided at crossing portions of the row and column electrodes. A drive unit 50 drives the display panel in response to an input image signal. The drive unit includes a column electrode driver 20 for applying a pixel data pulse to each of the column electrodes Zl-Zn. The pixel data pulse has a pulse voltage corresponding to pixel data derived from the input image signal. The column electrode driver includes a power source circuit 21 for generating a resonance pulse power source voltage having a predetermined resonance amplitude. The power source circuit also applies the resonance pulse power source voltage to a power source line 2. The column electrode driver also includes a pixel data pulse generator circuit 22 for selectively connecting the column electrodes with the power source line 2 based on the pixel data, to apply the pixel data pulse to the column electrodes Zl-Zn. The column electrode driver also includes a DC drive prevention circuit 23 for forcibly grounding the power source line 2 while the resonance pulse power source voltage is dropping, if an intermediate value Vc' of the resonance amplitude is greater than a predetermined reference voltage Vref'. <IMAGE>