Image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorShigeto Tanaka
Life of this patent
Estimating the term…
Abstract
Provided is an image reading apparatus including: an image reading unit configured to output image data representing an image read from an original; and an image control board configured to acquire the image data by controlling an operation of the image reading unit. When a shading error occurs, the image control board determines a part that has caused the shading error by determining whether or not a power supply voltage is being normally supplied to the image reading unit, determining whether or not a light source is normally emitting light, determining whether or not a memory is normally operating, and determining whether or not data output from the image reading unit is normally stored in the memory.
Claims16
An image reading apparatus, comprising:
- an image reading unit configured to read an image from an original to generate image data representing the read image;
- an image control unit configured to acquire the image data from the image reading unit;
- and
- a cable configured to connect the image reading unit and the image control unit to transmit the image data from the image reading unit to the image control unit and to supply power from the image control unit to the image reading unit,
- wherein the image reading unit includes:
- a light emitter configured to irradiate the original with light;
- and
- a light receiver configured to receive reflected light of the light from the original, to transmit the image data to the image control unit via the cable,
- wherein the image control unit includes:
- a controller configured to control an operation of the image reading unit;
- a memory configured to store the image data acquired from the image reading unit;
- and
- a monitor configured to perform monitoring, via the cable, of the power supplied from the image control unit to the image reading unit,
- wherein, when there occurs an error, which indicates that the operation of the image reading unit is unable to be appropriately operated, the controller is configured to determine a failed part to be replaced that has caused the error by:
- first determining whether a power supply voltage is being normally supplied to the image reading unit based on the result of the monitoring performed by the monitor;
- second determining whether the light emitter is normally emitting light;
- third determining whether the memory is normally operating;
- and
- fourth determining whether data output from the image reading unit is normally stored in the memory,
- wherein the second, third and fourth determining are performed in a case where it is determined that the power supply voltage is being normally supplied in the first determining.
Dependencies are inferred from the claim text.