Patent ID: 8659766
Filing Date: 2014-02-25
Classification: H04N

Abstract:
1. An image reading apparatus which reads an original image by using a photoelectric transducer, comprising: a first generation unit configured to generate, from a reference signal, a first driving signal to which SSCG spread modulation is applied; a second generation unit configured to generate, from the reference signal, a second driving signal to which no SSCG spread modulation is applied; a selection unit configured to select one of the first driving signal and the second driving signal; a timing signal generation unit configured to generate a timing signal for reading the original image, based on the driving signal selected by said selection unit; a latch unit configured to latch an image signal obtained by the photoelectric transducer, using the timing signal generated by said timing signal generation unit; and a transfer unit configured to transfer the image signal latched by said latch unit for subsequent image processing, wherein in a one-line original image reading operation, said selection unit selects the second driving signal till completion of a latch operation by said latch unit, and after the latch operation, selects the first driving signal for an image signal transfer operation by said transfer unit.