Image processing apparatus having a selectable power-saving mode, and image processing method using the selectable power-saving mode

1. An image processing apparatus, comprising:

a connection unit that is connectable to an external storage device;

an image reading unit that reads image data to be stored on the external storage device at least; and

a controller that controls power to be supplied in at least a standard mode or a power-saving mode, the power-saving mode consuming power less than in the standard mode,

wherein, when the external storage device is connected to the connection unit while the power-saving mode is selected, the controller determines whether the external storage device is write enabled, and supplies power to the image reading unit in the standard mode if the external storage device is write enabled, and supplies power to the image reading unit in the power-saving mode if the external storage device is not write-enabled.

2. The image processing apparatus according to claim 1 , further comprising an image forming unit that forms an image in accordance with data stored on the image processing apparatus,

wherein when the external storage device is connected to the connection unit while the power-saving mode is selected, the controller determines whether data to be image-formed is stored on the external storage device or not, and supplies power to the image forming unit in the standard mode if the controller determines the data to be image-formed is stored, or supplies power to the image forming unit in the power-saving mode if the controller determines that the data to be image-formed is not stored.

3. The image processing apparatus according to claim 2 , wherein the controller provides an alert to a user if the writing to the external storage device is disabled and if the data to be image-formed is not stored on the external storage device.

4. The image processing apparatus according to claim 1 , wherein the controller provides an alert to a user if the writing to the external storage device is disabled and if the data to be image-formed is not stored on the external storage device.

5. An image processing method of an image processing apparatus, comprising:

connecting a connection unit to an external storage device;

reading image data to be stored on the external storage device at least; and

controlling power to be supplied to an image reading unit by selecting between a standard mode and a power-saving mode consuming power less than in the standard mode,

wherein, when the external storage device is connected to the connection unit while the power-saving mode is selected, the controller determines whether the external storage device is write enabled, and supplies power to the image reading unit in the standard mode if the external storage device is write enabled, and supplies power to the image reading unit in the power-saving mode if the external storage device is not write-enabled.

6. An image processing apparatus, comprising:

a connection unit that is connectable to an external storage device;

an image reading unit that reads image data to be stored on the external storage device at least; and

a controller that controls an amount of power supplied to the image reading unit; and

wherein when the external storage device connected to the connection unit while the amount of power being supplied is less than in case where the image reading unit is operating, the controller determines whether the external storage device is write enabled,

and increases the amount of power being supplied to the image reading unit if the controller determines the external storage device is write enabled,

and controls the amount of power supplied to be less than during operation of the image reading unit if the controller determines the external storage device is not write enabled.

7. An image processing apparatus, comprising:

a connection unit that is connectable to an external storage device;

an image reading unit that reads image data to be stored on the external storage device at least; and

a controller that controls power to be supplied in at least a standard mode or a power-saving mode, the power-saving mode consuming power less than in the standard mode, an image forming unit that forms an image in accordance with data stored on the image processing apparatus,

wherein when the external storage device is connected to the connection unit while the power-saving mode is selected, the controller determines whether data to be image-formed is stored on the external storage device, and supplies power to the image forming unit in the standard mode if the controller determines the data to be image-formed is stored, and supplies power to the image forming unit in the power-saving mode if the controller determines the data to be image-formed is not stored.

8. The image processing apparatus according to claim 7 , wherein when the external storage device is connected to the connection unit while the power-saving mode is selected, the controller determines whether the external storage device is write enabled, and supplies power to the image reading unit in the standard mode if the controller determines the external storage device is write enabled, or supplies power to the image reading unit in the power-saving mode if the controller determines the external storage device is not write enabled.

9. The image processing apparatus according to claim 8 , wherein the controller provides an alert to a user if the writing to the external storage device is disabled and if the data to be image-formed is not stored on the external storage device.