Patent ID: 6931716

Claim:
An electric-component mounting system comprising: a substrate supporting device which supports a circuit substrate; a component supplying device which supplies an electric component; a component mounting device including a suction nozzle which receives the electric component supplied by the component supplying device, and mounts the component on the circuit substrate supported by the substrate supporting device; at least one of (a) a mark-image taking device which takes an image of at least one fiducial mark provided on the circuit substrate supported by the substrate supporting device and (b) a component-image taking device which takes an image of the electric component held by the suction nozzle; a processing and controlling device which includes a data processing portion that processes image data representing the image taken by said at least one of the mark-image taking device and the component-image taking device, and which modifies, based on a result of processing of the image data by the data processing portion, a predetermined component-mounting program, and controls, according to the modified component-mounting program, the mounting of the electric component by the component mounting device on the circuit substrate; said at least one of the mark-image taking device and the component-image taking device comprising an illuminating device including a light source which emits a light for illuminating an object, and a camera which takes an image of the object, at least one of the camera and the illuminating device comprising a brightness controlling device which controls a brightness of an image taken by the camera; and the processing and controlling device comprising a brightness detecting portion which detects a brightness of at least a portion of the image of the object taken by the camera, and a control-parameter varying portion which varies, based on the brightness detected by the brightness detecting portion, at least one control parameter of the brightness controlling device so that a brightness of at least a portion of an image taken by the camera is equal to a preset brightness.