Title:
TONER CONCENTRATION CONTROL USING TONER CONCENTRATION SENSOR
Document Type and Number:
WIPO Patent Application WO/2019/117420
Kind Code:
A1
Abstract:
An image forming apparatus includes a developing device to contain a developer, the developer including a toner; a developer cartridge to supply the developer to the developing device; a toner concentration sensor to sense a toner concentration of the toner included in the developer contained in the developing device; and a controller. The controller controls, during a non-printing operation a sensor control voltage to adjust an output level of the toner concentration sensor, to control an output of the toner concentration sensor to satisfy a controlling condition, and detects an shape of the output of the toner concentration sensor after the controller controls the sensor control voltage to adjust the output level. The controller adjusts, during a printing operation, the output of the toner concentration sensor, based on the detected shape of the output of the toner concentration sensor, and adjusts supplying the developer from the developer cartridge to the developing device, according to the adjusted output of the toner concentration sensor, to control the toner concentration.
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Inventors:
YOO JAE BEOM (KR)
Application Number:
PCT/KR2018/009079
Publication Date:
June 20, 2019
Filing Date:
August 09, 2018
Export Citation:
Assignee:
HP PRINTING KOREA CO LTD (KR)
International Classes:
G03G15/08
Foreign References:
| US20130230332A1 | 2013-09-05 | |||
| US20110229156A1 | 2011-09-22 | |||
| US20080124108A1 | 2008-05-29 | |||
| US20070053704A1 | 2007-03-08 | |||
| EP2434350A2 | 2012-03-28 |
Other References:
See also references of EP 3652591A4
Attorney, Agent or Firm:
Y.P.LEE, MOCK & PARTNERS (KR)
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