The present invention provides a plasma display driving device capable of
enhancing contrast by adjusting in accordance with the ambient illuminance
of a plasma display panel the level change rate at the leading edge
portion of a resetting pulse for causing the occurrence of a resetting
discharge, which initializes all the discharge cells of the plasma display
panel. The present invention also provides a plasma display panel driving
method for enabling power consumption to be held in check by changing the
number of sustaining pulses per unit time to be applied to each discharge
cell in an emission sustaining step in accordance with the ambient
illuminance of the plasma display panel, and, in addition, by adjusting
the pulse width of at the least one of the above-mentioned sustaining
pulse and scanning pulse for pixel data writing. The present invention
also provides a plasma display panel driving device that enables power
consumption to be held in check by determining a frequency of application
of a displaying pulse to be applied per unit time based on the average
brightness of an input image and the illuminance around a PDP, and by
applying displaying pulses to each discharge cell in accordance with the
frequency of the application.
