Abstract: An image reading apparatus includes an image sensor, a document feeder, and a processor. The document feeder includes a first driving device, a second driving device, a third driving device, a first sensor, and a second sensor. The first driving device includes a pick-up member to move documents from a tray to a document conveying path using a driving force through a first clutch. The second driving device is to move the tray with the documents to a side of the pick-up member using a driving force through a second clutch. The third driving device to move the documents along the document conveying path onto the image sensor using the driving force of the motor. The first and second sensors detect the documents on the document conveying path. The processor controls an operation of the first clutch based on the signals of the first and second sensors.

Abstract: An image reading apparatus includes an image sensor, a document feeder, and a processor. The document feeder includes a first driving device, a second driving device, a third driving device, a first sensor, and a second sensor. The first driving device includes a pick-up member to move documents from a tray to a document conveying path using a driving force through a first clutch. The second driving device is to move the tray with the documents to a side of the pick-up member using a driving force through a second clutch. The third driving device to move the documents along the document conveying path onto the image sensor using the driving force of the motor The first and second sensors detect the documents on the document conveying path. The processor controls an operation of the first clutch based on the signals of the first and second sensors.

Abstract: An image reading apparatus includes an image sensor, a document feeder, and a processor. The document feeder includes a first driving device, a second driving device, a third driving device, a first sensor, and a second sensor. The first driving device includes a pick-up member to move documents from a tray to a document conveying path using a driving force through a first clutch. The second driving device is to move the tray with the documents to a side of the pick-up member using a driving force through a second clutch. The third driving device to move the documents along the document conveying path onto the image sensor using the driving force of the motor The first and second sensors detect the documents on the document conveying path. The processor controls an operation of the first clutch based on the signals of the first and second sensors.

Abstract: An image reading apparatus includes an image sensor, a document feeder, and a processor. The document feeder includes a first driving device, a second driving device, a third driving device, a first sensor, and a second sensor. The first driving device includes a pick-up member to move documents from a tray to a document conveying path using a driving force through a first clutch. The second driving device is to move the tray with the documents to a side of the pick-up member using a driving force through a second clutch. The third driving device to move the documents along the document conveying path onto the image sensor using the driving force of the motor The first and second sensors detect the documents on the document conveying path. The processor controls an operation of the first clutch based on the signals of the first and second sensors.

Abstract: An image-forming apparatus having an Automatic Background Removal (ABR) function in an automatic document feeder mode and an operation control method thereof. The image-forming apparatus includes a first movement unit to move a document loaded in a document tray from a first position to a second position; a second movement unit to move a carriage containing a light source from the first position to the second position; an image processing part to process an image of the document into predetermined image data; and a control part to control the image processing part to process an image of a specific portion of the document read out by the carriage fixed at the first position and to process an entire image of the document read out by the carriage fixed at the second position in use of a predetermined contrast equalization pattern selected based on a image processing result of the specific portion.

Abstract: An image-forming apparatus having an Automatic Background Removal (ABR) function in an automatic document feeder mode and an operation control method thereof. The image-forming apparatus includes a first movement unit to move a document loaded in a document tray from a first position to a second position; a second movement unit to move a carriage containing a light source from the first position to the second position; an image processing part to process an image of the document into predetermined image data; and a control part to control the image processing part to process an image of a specific portion of the document read out by the carriage fixed at the first position and to process an entire image of the document read out by the carriage fixed at the second position in use of a predetermined contrast equalization pattern selected based on a image processing result of the specific portion.