Determination of status of laser scanning device using photo detector
AssigneeHewlett-Packard Development Company, L.P.
InventorSuwhan Kim
Life of this patent
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Abstract
An example method of operating an image forming apparatus includes setting an initial minimum voltage value of a laser light emitter at which a synchronization signal of a laser beam is detected by a photo detector, determining a first minimum voltage value of the laser light emitter at which the synchronization signal is detected by the photo detector in a non-image forming operation of the image forming apparatus, determining a state of a laser scanning device in the image forming apparatus based on a result of comparing the first minimum voltage value to the initial minimum voltage value, and outputting a result of the determining of the state of the laser scanning device.
Claims15
A method of operating an image forming apparatus, the method comprising:
- setting an initial minimum voltage value of a laser light emitter at which a synchronization signal of a laser beam is detected by a photo detector;
- determining a first minimum voltage value of the laser light emitter at which the synchronization signal is detected by the photo detector in a non-image forming operation of the image forming apparatus;
- determining a state of a laser scanning device in the image forming apparatus based on a result of comparing the first minimum voltage value to the initial minimum voltage value;
- and
- outputting a result of the determining of the state of the laser scanning device.
A non-transitory computer-readable storage medium storing instructions executable by a processor, the non-transitory computer-readable storage medium comprising:
- instructions for setting an initial minimum voltage value of a laser light emitter at which a synchronization signal of a laser beam is detected by a photo detector;
- instructions for determining a first minimum voltage value of the laser light emitter at which the synchronization signal is detected by the photo detector in a non-image forming operation of an image forming apparatus;
- instructions for determining a state of a laser scanning device in the image forming apparatus based on a result of comparing the first minimum voltage value to the initial minimum voltage value;
- and
- instructions for outputting a result of the determining of the state of the laser scanning device.
An image forming apparatus comprising:
- a laser scanning device comprising a laser light emitter to irradiate a laser beam used in an image forming operation and a photo detector to detect a synchronization signal of a laser beam;
- a communication device;
- a user interface device;
- a processor;
- and
- a memory storing instructions executable by the processor,
- wherein the processor executes the instructions to:
- set an initial minimum voltage value of a laser light emitter at which the synchronization signal is detected by the photo detector;
- determine a first minimum voltage value of the laser light emitter at which the synchronization signal is detected by the photo detector in a non-image forming operation;
- determine a state of the laser scanning device based on a result of comparing the first minimum voltage value to the initial minimum voltage value;
- and
- output a result of the determining of the state of the laser scanning device through the user interface device.
Dependencies are inferred from the claim text.