Patent ID: 6954043

Claim:
A power window driving apparatus for controlling the driving of a power window, comprising: a reference current generator, which generates a reference current (Ir) corresponding to a motor current in a level, the motor current flowing to a driving motor, the reference current generator including: a first current generator, which generates a first current corresponding to a variation value of the motor current in a level; and a second current generator, which generates a second current which is derived from a reference voltage, the second current being equal to the reference current when added to the first current, and the reference voltage generated from a time mean value of a first voltage which is converted from the first current; a comparator, which compares the reference voltage with a comparison signal which is greater than the first voltage; a stopping or reversing circuit, which stops or reverses the driving motor when it is determined that a drastic current increase is occurred in the motor current based on a comparison result by the comparator; a first timer, which measures a first predetermined time from the start of activation of the driving motor; a second timer, which measures a second predetermined time from the start of activation of the driving motor; a voltage difference holder, which hold a difference between the comparison signal and the reference voltage so as to be equal to or greater than a first predetermined value while the first timer is in operation, and in a state that the comparison signal is greater than the reference voltage signal; and a voltage difference reducer, which reduces monotonously the difference between the comparison signal and the reference voltage until the difference becomes a second predetermined value while the second timer is in operation after the first timer completes the measuring of time.