PATTERN RECOGNIZING DEVICE

摘要

PURPOSE:To attain start of reading operation by detecting that a current of a lighting lamp reaches a steady-state so as to use the signal. CONSTITUTION:When a lamp 4 is lighted by a signal So from a control section 33. When the lamp current approaches a steady-state value and exceeds a preset voltage VREF an output VCO of a comparator 8 is fed to a control section 33 as a signal S1. The control section 33 starts the reading by transmitting a paper feed start signal START to a paper feed mechanism when other conditions such as program load are established. The control section 33 performs recognizing processing to a video signal VIDEO outputted from a video signal processing section 32. A signal confirming the presence or absence of the signal S1 is fed to a gate after a prescribed time and when the signal S1 is absent, an alarm device is set and an alarm is raised.