Patent ID: 9698675
Date: 2017-07-04
CPC Classifications: G02F,G09G,H02M

Claim:
1. A driving circuit, comprising a boost circuit unit, a load unit and a voltage monitoring unit, the load unit is connected to a power source providing an initial input voltage, the boost circuit unit is connected to both the load unit and the voltage monitoring unit, the load unit is connected to the voltage monitoring unit; the load unit provides a resistor of fixed resistance value; and the voltage monitoring unit determines whether an actual voltage input into the boost circuit unit is smaller than a predetermined voltage, and generates a reset signal which is used to control the driving circuit to restart if it is determined that the actual voltage is smaller than the predetermined voltage; wherein the voltage monitoring unit comprises a voltage comparator, a signal input circuit and a logic circuit; an inverting input terminal of the voltage comparator is connected to the boost circuit unit, the signal input circuit is connected to an output terminal of the voltage comparator, a second input terminal of the logic circuit is connected to the signal input circuit, a non-inverting input terminal of the voltage comparator is input with the predetermined voltage, and a first input terminal of the logic circuit is input with a high level signal; the voltage comparator outputs a corresponding control voltage based on the actual voltage and the predetermined voltage; the signal input circuit determines whether the voltage value of the control voltage is positive, if it is determined that the voltage value of the control voltage is positive, inputs a high level signal to the logic circuit, and if it is determined that the voltage value of the control voltage is negative, inputs a low level signal to the logic circuit; and the logic circuit determines whether both a signal input by the first input terminal and a signal input by the second input terminal are high level signals, and generates the reset signal if it is determined that both the signal input by the first input terminal and the signal input by the second input terminal are high level signals.