Display apparatus and power circuit thereof

A display apparatus, comprising:

• a display panel including pixels;
• a gate shift register configured to simultaneously drive the pixels with a discharge scan signal of a gate high voltage to discharge residual electric charges of the pixels, in a power-off sequence where supply of an input voltage is released;
• and
• a power circuit including a first boosting circuit configured to boost the input voltage to a boost voltage in a display driving sequence preceding the power-off sequence, a second boosting circuit configured to boost the boost voltage to the gate high voltage, and a switch connected between the first boosting circuit and the second boosting circuit,
• wherein, during an extra switching period of the second boosting circuit which is performed after the input voltage is down-shifted to an under voltage lock out (UVLO) level so as to generate the gate high voltage of the discharge scan signal in the power-off sequence,
• the switch maintains an on state, and
• the input voltage stored in a first capacitor of the first boosting circuit and the boost voltage stored in a second capacitor of the second boosting circuit are applied to a power input terminal of the second boosting circuit.