Patent ID: 9088751
Filing Date: 2015-07-21
Classification: H04N

Abstract:
1. A control device comprising: a toner-density-related value identifying unit that identifies a toner-density-related value indicating a toner ratio in developer, wherein the developer includes toner and carrier, and the developer is contained in a developing unit of an image forming apparatus; a supply-amount-related value identifying unit that identifies a supply-amount-related value of the developer supplied to the developing unit; a correcting unit that corrects the toner-density-related value identified by the toner-density-related value identifying unit in accordance with a change to the supply-amount-related value identified by the supply-amount-related value identifying unit; and a correction value updating unit that updates a correction value in accordance with the supply-amount-related value identified by the supply-amount-related value identifying unit, wherein the correcting unit performs correction of the toner-density-related value by adding the updated correction value to the identified toner-density-related value or subtracting the updated correction value from the identified toner-density-related value, wherein the supply-amount-related value identifying unit identifies the supply-amount-related value, supplied to the developing unit, in a first time interval, and identifies the supply-amount-related value, supplied to the developing unit, in a second time interval which is shorter than the first time interval, and wherein the correcting unit increases the correction value in accordance with the supply-amount-related value identified in the first time interval and decreases the correction value in accordance with the supply-amount-related value identified in the second time interval.