Optical scanning device, image forming apparatus, and optical scanning method
AssigneeRicoh Company, Ltd.
InventorsKatsuhiko Maeda, Tadashi Shinohara, Yuugo Matsuura
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Abstract
An optical scanning device includes a light source emitting light to form an image by optical scanning; and a control section generating a control signal, which is for turning on and off the light source, based on an image signal. Further, the control section generates a pulse signal having a predetermined time width when the image signal indicates that the light source is to be turned off.
Claims9
An optical scanning device comprising:
- a light source configured to emit light to form an image by performing optical scanning a light emission delay after receiving a control signal, if the control signal is still in an ON state after the light emission delay;
- and
- a control section configured to generate the control signal based on an image signal such that a time width of the control signal is less than the light emission delay if the image signal is zero.
An optical scanning method of scanning with light from a light source to form an image, the method comprising:
- generating a control signal based on an image signal such that a time width of the control signal is less than a light emission delay if the image signal is zero, and
- scanning by emitting light a light emission delay after receiving the control signal, if the control signal is still in an ON state after the light emission delay.
A device for scanning with light from a light source to form an image, comprising:
- means for generating a control signal based on an image signal such that a time width of the control signal is less than a light emission delay if the image signal is zero, and
- means for scanning by emitting light a light emission delay after receiving the control signal, if the control signal is still in an ON state after the light emission delay.
Dependencies are inferred from the claim text.