Patent ID: 8503049

Claim:
A document reading apparatus comprising: a platen; a carriage configured to move along the platen and have a light source that illuminates a document placed on the platen; a reading unit configured to read the document illuminated by the light source; a document feeding unit configured to convey the document onto a document flow reading plate; a white reference member located between the platen and the document flow reading plate; and an input unit configured to input a reading start instruction, wherein, in a first case where the document fed by the document feeding unit is read, the carriage moves to a first position corresponding to the document flow reading plate and the reading unit reads the fed document, and wherein, in a second case where the document placed on the platen is read, the carriage moves to a second position corresponding to the white reference member and the reading unit reads the white reference member, and subsequently, the reading unit moves to a run-up start position and waits for a reading start instruction to be input, and thereafter, in a case where the reading start instruction is input before a predetermined time has elapsed since the reading unit reads the white reference member, the reading unit reads the document placed on the platen while the carriage moves from the run-up start position along the platen, and in a case where the predetermined time has elapsed since the reading unit reads the white reference member, the carriage moves from the run-up start position to the second position and the reading unit reads the white reference member, and subsequently, the reading unit moves to the run-up start position and waits for the reading start instruction to be input.