Patent ID: 6310965
Filing Date: 2001-10-30
Classification: H04N

Abstract:
A manuscript document detecting system, comprising:a scanning light radiating means for radiating scanning light toward a manuscript document;a reflected light detecting means for detecting scanning light reflected from said manuscript document; anda pulse signal generating means for generating a pulse signal representing a scanning position of said scanning light;wherein an end portion of said manuscript document is detected based on said reflected light, and at least one of a size and a position of said manuscript document is detected based on said pulse signal;said pulse signal generating means generates said pulse signal representing a start of light scanning and representing a position of said scanning light after starting the scanning operation per each of respective predetermined time intervals, and generates a clock signal oscillating with a constant time period shorter than that of said pulse signal for measuring said predetermined time intervals; andthe position of said scanning light is calculated as a function of both a count value of said pulse signal and a count value of said clock signal.