Patent ID: 8913306
Filing Date: 2014-12-16
Classification: G03G,H04N

Abstract:
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.