Patent ID: 8269993

Claim:
A document reading apparatus, comprising: a document reading portion for reading an image of a document placed on a document platen; a first detecting sensor for detecting that a document is on the document platen; a display portion disposed next to the document platen and having an area sensor for reading an image of a small-sized document placed on a display screen and detecting that a document is on the display screen; and a control portion for performing control, when detecting that a document is on the document platen or on the display screen by the first detecting sensor and the area sensor, for reading an image of the document by the document reading portion or the area sensor, wherein when detecting that the document is on the document platen by the first sensor and detecting that the document is on the display screen by the area sensor, detecting whether or not the document is a standard size by a part of the area sensor or by a sensor for detecting a standard size provided separately from the area sensor, and detecting that the document is not a standard size, the control portion performs control so that the document reading portion performs reading of the image of the document on the document platen and the area sensor is prohibited from reading the image of the document.