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Optical writing device and image forming apparatus
US9335652B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9335652-B2 |
| Application number | US-201414182379-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 18, 2014 |
| Priority date | Feb 20, 2013 |
| Publication date | May 10, 2016 |
| Grant date | May 10, 2016 |
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Abstract
Official abstract text for this publication.
An optical writing device having; a plurality of light-emitting points; a plurality of drive circuits for supplying drive currents to the plurality of light-emitting points respectively; a photodetector for outputting signals indicating quantities of light entering thereto from the respective light-emitting points; a gain switch circuit for outputting photodetection signals obtained by amplifying the signals output from the photodetector in regard to the respective light-emitting points with gains preset for the respective light-emitting points; and a control circuit for controlling the drive circuits such that the photodetection signals output from the gain switch circuit in regard to the respective light-emitting points coincide with a value substantially equal to a predetermined reference value. The gains for the respective light-emitting points are preset based on the distances between the photodetector and the respective light-emitting points.
First claim
Opening claim text (preview).
What is claimed is: 1. An optical writing device comprising: a plurality of light-emitting points; a plurality of drive units for supplying drive currents to the plurality of light-emitting points respectively; a photodetector for outputting signals indicating quantities of light entering thereto from the respective light-emitting points; a gain switch unit for outputting photodetection signals obtained by amplifying the signals output from the photodetector in regard to the…
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Classifications
- G03G15/04054Primary
Physics · mapped topic
- G03G15/043Primary
Physics · mapped topic
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Frequently asked questions
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- What does patent US9335652B2 cover?
- An optical writing device having; a plurality of light-emitting points; a plurality of drive circuits for supplying drive currents to the plurality of light-emitting points respectively; a photodetector for outputting signals indicating quantities of light entering thereto from the respective light-emitting points; a gain switch circuit for outputting photodetection signals obtained by amplifyi…
- Who is the assignee on this patent?
- Konica Minolta Inc
- What technology area does this patent fall under?
- Primary CPC classification G03G15/04054. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue May 10 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).