Image forming apparatus
US-2016349657-A1 · Dec 1, 2016 · US
Power-supply device and image formation apparatus
US9141019B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9141019-B2 |
| Application number | US-201414462630-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 19, 2014 |
| Priority date | Aug 23, 2013 |
| Publication date | Sep 22, 2015 |
| Grant date | Sep 22, 2015 |
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- Title
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Abstract
Official abstract text for this publication.
A power-supply device includes: a rectifier circuit configured to output a rectified voltage by rectifying an output from a transformer; a comparator circuit configured to compare a comparison voltage corresponding to an output voltage or an output current that are generated based on the rectified voltage with the indicator voltage and to control an operation of the transformer drive circuit so as to reduce the difference between the comparison voltage and the indicator voltage; a constant voltage element configured to limit the output voltage or the output current by operating as a constant voltage source when the value of the output voltage or the output current reaches a threshold; and a current mirror circuit. The current mirror circuit is configured to lower the indicator voltage by allowing a current proportional to the current flowing through the constant voltage element to flow through the current path.
First claim
Opening claim text (preview).
The invention claimed is: 1. A power-supply device that supplies a load with power, comprising: a transformer; a transformer drive circuit configured to drive the transformer; a rectifier circuit configured to output a rectified voltage by rectifying an output from the transformer; a power-supply output terminal configured to supply the load with an output voltage and an output current generated based on the rectified voltage; a comparator circuit including an input termin…
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Classifications
- G03G15/0283Primary
Physics · mapped topic
Electricity · mapped topic
Physics · mapped topic
Physics · mapped topic
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Frequently asked questions
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- What does patent US9141019B2 cover?
- A power-supply device includes: a rectifier circuit configured to output a rectified voltage by rectifying an output from a transformer; a comparator circuit configured to compare a comparison voltage corresponding to an output voltage or an output current that are generated based on the rectified voltage with the indicator voltage and to control an operation of the transformer drive circuit so…
- Who is the assignee on this patent?
- Oki Data Kk
- What technology area does this patent fall under?
- Primary CPC classification G03G15/0283. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 22 2015 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).