Title:
IMAGE-FORMING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/101487
Kind Code:
A1
Abstract:
A control unit develops a plurality of electrostatic latent images for detection, which are formed at different development contrasts, into toner images (S1, S2), and acquires a current value which fluctuates according to the amount of toner remaining on a development roller after the developments (S3). Utilizing the fact that a fall in the current value, which occurs as the amount of toner decreases, is greater when the development efficiency is higher than when the development efficiency is lower, the development contrast to be used for image formation is set on the basis of a development contrast at which current values are within a prescribed range due to the development efficiency reaching substantially the upper limit ("YES" in S4). When development is performed at the set development contrast, a high development efficiency can be maintained when developing an electrostatic latent image into a toner image, and from among the toner present in the liquid developer, toner corresponding to a greater range of particle diameter is used for the development, making it possible to inhibit a toner image having a low image density from being developed.
Inventors:
FUJIOKA RYOTA (JP)
Application Number:
PCT/JP2017/043896
Publication Date:
June 07, 2018
Filing Date:
November 30, 2017
Export Citation:
Assignee:
CANON KK (JP)
International Classes:
G03G15/10; G03G15/00; G03G15/06
Foreign References:
| JP2010526338A | 2010-07-29 | |||
| US20150071665A1 | 2015-03-12 | |||
| JP2015055778A | 2015-03-23 |
Attorney, Agent or Firm:
YAMADA, Ryuichi (JP)
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