Document reading apparatus

摘要

Provided is a document reading apparatus capable of surely detecting the document cover open/closed state and the open/close operation, without being affected by the external environment. This document reading apparatus includes a light source, a linear reading device and a document cover. In this document reading apparatus, the light amount value of the light received by the linear reading section while the light source is turned on, and the light amount value of the light received by the linear reading section when the light source is turned off are used to detect the open/closed state and the open/close operation of the document cover, wherein the preparation for printing starts when the document cover has shifted from the open state to the closed state.

主权项

1. A document reading apparatus comprising:
a platen glass on which a document is to be placed; a document cover provided over the platen glass so as to be opened and closed, the document cover pressing the document in close contact with the platen glass when the document cover is closed; a light source configured to emit light toward the platen glass from under the platen glass; a sensor which reads the amount of the light coming from the light source when the light source is turned on and when the light source is turned off; and a controller which detects an open state of the document cover based on both a light amount value read by the sensor when the light source is turned on and a light amount value read by the sensor when the light source is turned off, and detects a closed state of the document cover based on both the light amount value read by the sensor when the light source is turned on and the light amount value read by the sensor when the light source is turned off.