Light source drive device, optical scanning device and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorsMasaaki Ishida, Atsufumi Omori, Hayato Fujita
Life of this patent
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Abstract
A light source drive device includes a first current source which provides a predetermined current to a light source corresponding to a predetermined light output, and a second current source which provides an overshoot current to the light source synchronized with the predetermined current. A processor is configured to set an overshoot time during which the overshoot current is provided to the light source. Further, an overshoot current is set which is applied to the light source. The overshoot time is set so that the overshoot time based on the rising of the predetermined current to when a light emission of the light source is detected.
Claims13
A light source drive device comprising:
- a first current source which provides a predetermined current to a light source corresponding to a predetermined light output;
- a second current source which provides an overshoot current to the light source synchronized with the predetermined current of the first current source, the overshoot current being an additional current which increases the current applied to the light source;
- and
- a processor configured to perform:
- setting an overshoot time during which the overshoot current is applied to the light source;
- and
- setting an overshoot current which is applied to the light source,
- wherein the overshoot time is set so that the overshoot time is smaller than a time period from the rising of the predetermined current to when a light emission of the light source is detected.
A light source drive device, comprising:
- a first current source which provides a predetermined current to a light source corresponding to a predetermined light output;
- a second current source which provides an overshoot current to the light source synchronized with the predetermined current of the first current source, the overshoot current being an additional current which increases the current applied to the light source;
- means for setting an overshoot time during which the overshoot current is applied to the light source;
- and
- means for setting an overshoot current which is applied to the light source,
- wherein the overshoot time is set so that the overshoot time is smaller than a time period from the rising of the predetermined current to when a light emission of the light source is detected.
A method of driving a light source, comprising:
- setting an overshoot time during which an overshoot current is applied to the light source;
- setting an overshoot current which is applied to the light source so that the overshoot time is smaller than a time period from the rising of the predetermined current to when a light emission of the light source is detected;
- providing a predetermined current to the light source corresponding to a predetermined light output;
- providing the overshoot current to the light source for the overshoot time, synchronized with the predetermined current of the first current source, the overshoot current being an additional current which increases the current applied to the light source.
Dependencies are inferred from the claim text.