Driving device of luminescent display panel and driving method of the same

In a driving device of a luminescent display panel of the type in which luminescent elements each having luminescence controlled by a luminescence driving transistor are arranged at intersecting positions of a plurality of data lines and a plurality of scanning lines and in which pixels each including a plurality of sub-pixels having different luminescent colors are arranged at the luminescent elements, the improvement comprising:

• scanning means that scans the sub-pixels of all of the different luminescent colors at a same start timing of scanning in the respective sub-frame periods formed by time-dividing one frame period, thereby scanning all of the pixels formed on the luminescent display panel;
• a transistor for erasing that discharges and erases electric charges from a capacitor holding a gate potential of the luminescence driving transistor;
• and
• color balance controlling means that discharges the electric charges of the capacitor by the transistor for erasing to stop the luminescent element from luminescing to set a non-luminescence period of the luminescent element in the respective sub-frame periods, thereby controlling a ratio of relative luminescence times of the respective different luminescent colors in the respective sub-pixel scanning periods.

In a driving device of a luminescent display panel of the type in which luminescent elements each having luminescence controlled by a luminescence driving transistor are arranged at intersecting positions of a plurality of data lines and a plurality of scanning lines and in which pixels each including a plurality of sub-pixels having different luminescent colors are arranged at the luminescent elements, the improvement comprising:

• luminescence stop controlling means that stops the luminescent element from luminescing by using a transistor for erasing that discharges and erases electric charges from a capacitor holding a gate potential of the luminescence driving transistor;
• data supply controlling means that applies a data voltage to the data lines corresponding to the sub-pixels having different luminescent colors, which construct a same pixel, at different timings for respective luminescent colors in respective sub-frame periods formed by time-dividing one frame period;
• and
• color balance controlling means that stops the luminescent elements of the sub-pixels of the respective different luminescent colors from luminescing by the luminescence stop controlling means when the respective sub-frame periods start to thereby set a non-luminescence period of the pixel when the respective sub-frame periods start, and controls timing of applying the data voltage by the data supply control means to cause the sub-pixels to start to luminesce for the respective luminescent colors, thereby controlling a ratio of relative luminescence times of the respective different luminescent colors in the respective sub-frame periods.

In a driving method of a luminescent display panel of the type in which luminescent elements each having luminescence controlled by a luminescence driving transistor are arranged at intersecting positions of a plurality of data lines and a plurality of scanning lines and in which pixels each including a plurality of sub-pixels having different luminescent colors are arranged at the luminescent elements, the improvement comprising the steps of:

• stopping the luminescent elements of the sub-pixels of the respective different luminescent colors from luminescing at a same time by using a transistor for erasing that discharges and erases electric charges from a capacitor holding a gate potential of the luminescence driving transistor when the respective sub-frame periods formed by time-dividing one frame period start, thereby setting a non-luminescence period of the pixel when the respective sub-frame periods start;
• and
• controlling timing of applying a data voltage to data lines corresponding to the respective different luminescent colors for the sub-pixels of respective different luminescent colors, which construct a same pixel, in the respective sub-frame periods, thereby causing the sub-pixels to start to luminesce for the respective luminescent colors, and thereby controlling a ratio of relative luminescence times of the respective different luminescent colors in the respective sub-frame periods.