To widen the selecting width of an electric discharge and to obtain a driving method without a luminance nonuniformity by executing driving by means of a keeping pulse which is provided with a first voltage value for executing the first electric discharge during a half period and the second voltage value for executing the second discharge.
Electric discharge is executed by the combination of (Vs-Vs), (Vs-Vk) and (Vk-Vk) by giving an intermediate voltage being a second voltage value (Vk) though the voltage to be discharged is given only by the first voltage (Vs) in a conventional manner. That is, a cell itself discharges electricity by freely selecting the discharge voltage in accordance with its own electric discharge characteristic. Therefore, the cell executing discharge by Vs and the cell executing discharge by Vk exist, a light emission waveform L becomes the one for emitting light twice in the half period of the keeping pulse as the whole cell, first discharge is executed by the first voltage value Vs and the second one is executed by the second voltage value Vk so that the luminance nonuniformity owing to the dispersion of the electric discharge voltage is reduced.
IWATA AKIHIKO
URAKABE TAKAHIRO
