Display Apparatus Driving Circuit Mobility Dispersion Correction

The patent applies preliminary action by setting the first terminal of the signal level storage capacitor to a halftone voltage before the final gradation voltage is applied. This preliminary halftone voltage setting enables the driving transistor to be turned on and perform mobility dispersion correction in advance, ensuring that when time-divisional scanning is used, the transistor has already been activated and can properly correct for mobility variations across different scanning lines, thereby maintaining emission luminance uniformity while keeping the driving circuit configuration simple.

The patent implements periodic action by cycling the driving transistor between on and off states in a controlled sequence. The transistor is turned on during the halftone voltage setting period to perform mobility dispersion correction, then turned off during the fixed voltage holding period to save power, and subsequently turned on again when the gradation voltage is applied for final correction. This periodic switching enables both power savings and continuous mobility dispersion correction across different time periods.

The patent applies segmentation by dividing the charging operation into distinct segments or periods. The first terminal of the signal level storage capacitor is set to different voltages in different time periods: halftone voltage in the first period (enabling correction), fixed voltage in the second period (maintaining correction while saving power), and gradation voltage in the third period (final correction). This segmented approach ensures mobility dispersion correction is performed at appropriate intervals without requiring continuous charging, thereby preserving dynamic range while maintaining correction effectiveness.