Patent ID: 6917173

Claim:
An automobile wiper driving apparatus comprising: a DC motor driven by a DC power supply for repeatedly moving a wiper between a prescribed park position and a maximum wiping position; and wiper controlling means for receiving a signal indicating an inputted operation speed of said wiper and controlling said wiper to move at the inputted operation speed by driving said DC motor at a rotation speed which corresponds to the inputted operation speed, wherein said wiper and wiper controlling means are assembled in a module, and said wiper controlling means comprises; a switching element, provided on a current route between said DC power supply and said DC motor, receiving a pulse width modulation signal having a duty which corresponds to the inputted operation speed, performing a switching on and off operation responsive to the pulse width modulation signal so as to drive said DC motor at the rotation speed, and controlling said wiper to move at the inputted operation speed; and a relay, connected in parallel with said switching element, for switching on to move said wiper at a predetermined operation speed regardless of states of said switching element, when the inputted operation speed is equal to the predetermined operation speed.