Power supply device and image forming apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7884587
APP PUB NO 20090045792A1
SERIAL NO

12222322

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A charging unit charges a capacitor that is configured to be charged and discharged to drive a load. A switching unit switches on and off between the capacitor and the charging unit. A delay control unit delays an output of a switching control signal for controlling the switching unit until an output voltage of the charging unit exceeds a voltage of the capacitor, and outputs a delayed switching control signal. An output unit receives the delayed switching control signal from the delay control unit, and outputs the delayed switching control signal to the switching unit so that the charging unit charges the capacitor.

First Claim

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Patent Owner(s)

Patent OwnerAddress
RICOH COMPANY LIMITEDTOKYO 143-8555

International Classification(s)

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  • 2008 Application Filing Year
  • G05F Class
  • 1399 Applications Filed
  • 821 Patents Issued To-Date
  • 58.69 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances200820092010201120122013201420150255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nomura, Yuta Miyagi, JP 4 10
Sugawara, Masae Miyagi, JP 10 99

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Patent Citation Ranking

  • 1 Citation Count
  • G05F Class
  • 2.64 % this patent is cited more than
  • 14 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges122431044523118422101 - 1011 - 2021 - 3031 - 4041 - 5051 - 6061 - 7071 - 8081 - 9091 - 100020406080100120140160180200220240260

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