Image forming apparatus
AssigneeRicoh Company, Ltd.
InventorShingo Hayashi
Life of this patent
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Abstract
An image-data acquiring unit acquires image data of an image. An image processing unit performs a predetermined image processing on the image data. A signal generating unit generates a scanning signal for determining a section of the image data for performing the image processing. A signal control unit stores waveform information of a scanning signal in a normal operation as a control signal, compares the control signal with the scanning signal generated by the signal generating unit, and detects an abnormality of the scanning signal. A scan control unit determines whether the image processing is to be continued based on a result of detection by the signal control unit.
Claims13
An image forming apparatus comprising an image scanning device that includes an image-data acquiring unit that scans an image of an original placed on an exposure glass and acquires image data of the image, an image processing unit that performs a predetermined image processing on the image data, a signal generating unit that generates a scanning signal for determining a section of the image data for performing the image processing, a signal control unit that stores therein waveform information of a scanning signal in a normal operation as a control signal, compares the control signal with the scanning signal generated by the signal generating unit, and detects an abnormality of the scanning signal based on a result of comparison, and a scan control unit that determines whether the image processing is to be continued based on a result of detection by the signal control unit, wherein
- the image scanning device further includes
- a carriage that houses a scanning unit that scans the image of the original, and
- a driving motor for driving the cartridge along the exposure glass during an optical scanning, and
- in a platen scanning mode in which the original is manually placed on the exposure glass to scan the image of the original, the signal control unit compares the control signal with the scanning signal that is generated by the signal generating unit during an operation period of the driving motor.
An image forming apparatus comprising an image scanning device that includes a flatbed-type original conveying device that conveys an original onto a predetermined position of an exposure glass, an image-data acquiring unit that scans an image of the original conveyed and placed on the predetermined position of the exposure glass and acquires image data of the image, an image processing unit that performs a predetermined image processing on the image data, a signal generating unit that generates a scanning signal for determining a section of the image data for performing the image processing, a signal control unit that stores therein waveform information of a scanning signal in a normal operation as a control signal, compares the control signal with the scanning signal generated by the signal generating unit, and detects an abnormality of the scanning signal based on a result of comparison, and a scan control unit that determines whether the image processing is to be continued based on a result of detection by the signal control unit, wherein
- the image scanning device further includes
- a carriage that houses a scanning unit that scans the image of the original, and
- a driving motor for driving the cartridge along the exposure glass during an optical scanning, and
- in an automatic scanning mode using the flatbed-type original conveying device, the signal control unit compares the control signal with the scanning signal that is generated by the signal generating unit during an operation period of the driving motor.
An image forming apparatus comprising an image scanning device that includes a sheet-through original conveying device that automatically conveys an original onto an exposure glass, an image-data acquiring unit that scans an image of the original conveyed onto the exposure glass and acquires image data of the image, an image processing unit that performs a predetermined image processing on the image data, a signal generating unit that generates a scanning signal for determining a section of the image data for performing the image processing, a signal control unit that stores therein waveform information of a scanning signal in a normal operation as a control signal, compares the control signal with the scanning signal generated by the signal generating unit, and detects an abnormality of the scanning signal based on a result of comparison, and a scan control unit that determines whether the image processing is to be continued based on a result of detection by the signal control unit, wherein
- in an automatic scanning mode using the sheet-through original conveying device, the signal control unit compares the control signal with the scanning signal that is generated by the signal generating unit for a period during which the sheet-through original conveying device conveys or discharges the original.
Dependencies are inferred from the claim text.