Patent ID: 7679588

Claim:
A display device comprising: data lines disposed in a first direction; scan lines disposed in a second direction different from the first direction; a plurality of pixels formed in cross areas of the data lines and the scan lines, and configured to drive on the basis of a driving voltage; a charge storing circuit coupled to at least one data line during a first sub-discharge time of a discharge time, and configured to store charges discharged from the data line during the first sub-discharge time, wherein the discharge time includes at least two sub-discharge times; a discharging circuit coupled to the data line during a second sub-discharge time of the discharge time, and configured to discharge the data line up to a certain discharge voltage during the second sub-discharge time; a battery providing a battery voltage; a voltage adjusting circuit configured to boost the battery voltage outputted from the battery and output the driving voltage, wherein charges stored in the charge storing circuit are provided to the battery during the second sub-discharge time; a comparing circuit coupled to the battery and charge storing circuit, and configured to compare the battery voltage outputted from the battery with a charging voltage corresponding to charges stored in the charge storing circuit; and a switching circuit configured to switch the couple between the battery and the charge storing circuit in accordance with a comparison result of the comparing circuit, wherein the switching circuit turns off the couple between the battery and the charge storing circuit when the battery voltage is higher than the charging voltage, and the switching circuit turns on the couple between the battery and the charge storing circuit when the battery voltage is the same as, or less than the charging voltage.