Patent ID: 8004724

Claim:
An image reading apparatus for reading an image on an original, comprising: reading means for optically reading the image of the original while the image is illuminated by light from a light source; moving means for moving said reading means relative to the original; position signal generating means for outputting a position signal in accordance with movement of said reading means by said moving means; moving control means for inputting the position signal and for controlling moving speed of said reading means by using the position signal; lighting control means for controlling said light source to start lighting of the light source based on output of the position signal and to end lighting of the light source after the light source lights for a first period; and output control means for generating a control signal for outputting an image signal corresponding to the image read by said reading means after said light source lights for the first period and for outputting the image signal for a second period in synchronism with the control signal, wherein the moving speed of said reading means is such that a period of the position signal is longer than the first period.