Power window system

1. A power window system of a motor vehicle for preventing pinching of an intervening object when moving a window glass in a closing direction, the system moving the window glass in opening and closing directions in response to operation of an opening and closing instruction switch to move the window glass upward or downward, the system comprising:

a measurement device for obtaining an open degree of the window glass prior to moving the window glass upward or downward, and

a control device for controlling movement of the window glass in response to operation of the switch, the switch having three instruction modes of up, down, and auto operations of the window glass,

wherein, in the mode of auto operation of the switch, the control device, after having determined that the window glass is not fully closed, uses solely an open degree obtained by said measurement device prior to moving the glass upward or downward compared to a predetermined degree, and moves the window glass in the closing direction when the open degree is not less than the predetermined degree and moves the window glass in the opening direction when the open degree is less than the predetermined degree, and the predetermined degree corresponds to an intermediate position between a closed position and a fully open position with regard to the window glass.

2. The power window system recited in claim 1 , further comprising:

a remote control unit having the switch and a radio device for transmitting a radio signal corresponding to the operation of the switch, and

a driving unit having the measurement device, the control device, and a receiver device for receiving the radio signal.

3. The power window system recited in claim 2 , wherein the switch is a single switch having an operation portion movable only in one direction.

4. The power window system recited in claim 1 , further comprising an electric motor for moving the window glass, wherein the predetermined open degree corresponds to a value obtained by adding an initial movement amount of the window glass to a diameter of an intervening object, the initial movement amount corresponding to an amount moved by the window glass during a period in which an over current is generated in the electric motor at starting of the electric motor.

5. The power window system recited in claim 4 , wherein the intervening object is a finger, a hand or an arm of a person.