Patent ID: 6900605
Filing Date: 2005-05-31
Classification: B60R

Abstract:
1. A control circuit that is used in a mirror device, where the position of a mirror attached to a vehicle is changed in a predetermined direction by the driving force of a motor, and controls electrical power supplied to the motor, the control circuit comprising: a drive current controlling transistor where, when a first terminal is connected to a power source, a second terminal is connected to the motor and a voltage equal to or greater than a predetermined value is applied to a third terminal that is different from both the first and second terminals, a current flows from the first terminal to the second terminal and application of the voltage is released, whereby the current is blocked; and a switching transistor where a fourth terminal is connected between the power source and the third terminal, a fifth terminal is grounded, and which includes a sixth terminal connected to the motor at an opposite side from the second terminal, and a voltage equal to or greater than a specific value corresponding to a lock current flowing through the motor is applied to the sixth terminal, whereby the fourth terminal and the fifth terminal are switched to a conductive state and the voltage applied to the third terminal is made less than the predetermined value.