Optical scanning device, image forming apparatus, and optical scanning method
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.
1. 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.
2. The optical scanning device according to claim 1 , wherein the control section is configured to generate the control signal having the time width less than the light emission delay only in a time period other than a time period during the optical scanning in an area of the image.
3. The optical scanning device according to claim 1 , wherein the control section is configured to determine the time width based on a temperature of the light source or a temperature near the light source.
4. The optical scanning device according to claim 1 , wherein the control section is configured to determine the time width based on a voltage of the control signal.
5. The optical scanning device according to claim 1 , wherein the control section is configured to determine the time width based on an instruction from an operator.
6. The optical scanning device according to claim 1 ,
wherein the light emission delay is a time period from when the control signal instructs the light source to turn on to when the light source generates light.
7. An image forming apparatus comprising:
the optical scanning device according to claim 1 .
8. 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.
9. 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.