Patent ID: 7339709

Claim:
An image input apparatus having a light source that illuminates an original, a first photodiode array that reads reflective light from a monochromatic original illuminated by the light source, and second, third and fourth photodiode arrays that receive reflective light from a color original illuminated by the light source, comprising: a first control section that effects, in reading of the monochromatic original, a control to output a charge photoelectrically converted and accumulated by the first photodiode array and a control not to accumulate charges photoelectrically converted by the second, third and fourth photodiode arrays; and a second control section that effects, in reading of the color original, a control to output charges photoelectrically converted and accumulated by the second, third and fourth photodiode arrays and a control not to accumulate a charge photoelectrically converted by the first photodiode array; wherein the first and second control sections independently control a first shift gate for transferring a charge from the first photodiode array to a first analog shift register, a second shift gate for transferring a charge from the second photodiode array to a second analog shift register, a third shift gate for transferring a charge from the third photodiode array to a third analog shift register, and a fourth shift gate for transferring a charge from the fourth photodiode array to a fourth analog shift register.