A portable telephone device with incorporated projector 10 starts projection by a projection module 6 when a relative angle θ is set to a projection attitude of 80° and three seconds elapses. If a setting is made for performing vibration correction processing, then a camera unit 200 is commanded to start image-capturing or photographing frame pictures continuously. The portable telephone device with incorporated projector 10 calculates six movement vectors by comparing pictures between successive frames photographed by an image sensor. Along with deciding upon “hand tremor” based upon the movement vectors which are calculated, moreover a representative vector is calculated. The portable telephone device with incorporated projector 10 further creates picture shift information for canceling the representative vector, and, if “hand tremor” has been decided upon, suppresses vibration or wobbling of the contents projected by the projector module using the picture shift information.