Title:
IMAGE FORMING APPARATUS
Document Type and Number:
Japanese Patent JP2014219538
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To remove the influence of ripple noise from a value detected by a toner concentration sensor.SOLUTION: An image forming apparatus includes: an image forming unit 5 for forming a toner image; an image carrier 6 which carries the toner image; and a toner concentration sensor 15 which detects toner concentration of the toner image formed on the image carrier 6 at a predetermined sampling period. The image forming apparatus also includes: a ripple noise period calculation unit 113 which calculates a ripple noise period generated from one or more AC component generation sources 8, 9 located near the toner concentration sensor 15, from AC component frequency information of the AC component generation sources 8, 9; a sampling period control unit 114 which varies the sampling period according to the calculated ripple noise period; and an averaging process unit 100 which averages a plurality of sampling values output from the toner concentration sensor 15, according to the varied sampling period.
Inventors:
KUSUNOKI TAKAHIRO
KOSHIMURA YASUSHI
YAMAGUCHI TORU
TOYOFUKU KATSUYA
KOSHIMURA YASUSHI
YAMAGUCHI TORU
TOYOFUKU KATSUYA
Application Number:
JP2013098251A
Publication Date:
November 20, 2014
Filing Date:
May 08, 2013
Export Citation:
Assignee:
KONICA MINOLTA INC
International Classes:
G03G15/00; G03G21/00
Domestic Patent References:
| JP2012230312A | 2012-11-22 | |||
| JPH0477678A | 1992-03-11 | |||
| JP2013041162A | 2013-02-28 | |||
| JPH05333653A | 1993-12-17 | |||
| JPH1078734A | 1998-03-24 |
Foreign References:
| US20130108292A1 | 2013-05-02 | |||
| US20130108292A1 | 2013-05-02 |
Attorney, Agent or Firm:
Patent business corporation Nobutomo international patent firm