The present invention provides a voltage generation circuit, comprising a control unit, a controlled unit and an output unit, and the control unit receives a trigger signal to generate a control signal having a preset delay, and the control unit is further coupled to the controlled unit to control the controlled unit to be in a first state in a duration of the preset delay and to be in a second state in a duration of a non-preset delay, and the output unit outputs a first drive voltage to the drive unit as the controlled unit is in the first state and to output a second drive voltage to the drive unit as the controlled unit is in the second state, and the first drive voltage is smaller than the second drive voltage to achieve decreasing the drive voltage to lower power consumption of the data drive chip.