| 摘要 |
PROBLEM TO BE SOLVED: To prevent the image-persistence of a liquid crystal display device at the time of power source off. SOLUTION: A first reference value for the time of power source on and a second reference value for the time of power source off are written in a memory 38. At the time of the power source off, over at least one field, plasma discharge is sequentially generated for every 1 horizontal period on all channel ways of a PALC display device 1, a control part 31 sends out the voltage according to the second reference value to a floating power source part 36 as a reference voltage Vr, thereby, the difference Epp of the upper side voltage Eu and the lower side voltage Ed of floating power supply voltage EF is set to a 60 V. A common anode driver voltage is set to a 0 V in the line at a non-inverting side, and is set to the 60 V in the line at an inversion side. A transparent electrode driver voltage is set to the 0 V in the line at the non-inverting side, and is set to the 60 V in the line at the inversion side. Therefore, the 0 V is written in all the pixels of the PALC display device 1 at the time of power source off.
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