Patent ID: 6856112

Claim:
A power window driving device, comprising: a reference-current generator, generating a reference current having a level which corresponds to the size of a motor current flowing into a drive motor for driving a power window; a first current generator, generating a first current which is a part of the reference current and corresponds to a variable quantity in the motor current; a second current generator, generating a second current which is a part of the reference current and to which adding the first current results in the prescribed reference current; a comparison signal generator, generating a comparison signal by converting the first current into voltage; a comparator, comparing the comparison signal with a reference voltage signal generated on the basis of the first current; and a reverser, stopping or reversing the drive motor based on a result of the comparator which determine that a steep current increase is occurred in the motor current, wherein when the first current repeats decrease and increase in excess of a predetermined value in a predetermined period, the second current is increased for a predetermined period in respective cycles of the decrease and the increase of the first current so that the increase of the first current is relatively retrained or the decrease of the first current is relatively promoted for decreasing a detection sensitivity to a current increase in the motor current.