Patent ID: 8503893
Filing Date: 2013-08-06
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a developer unit configured to store two-component developer that includes toner and carrier and develop an electrostatic latent image formed on an image carrier; a toner concentration detector configured to detect toner concentration in a developer unit; a toner supply unit configured to supply toner to the developer unit; and a controller configured to control toner supply amount and function as a toner supply controller that has a memory and controls the toner supply unit by comparing an output value of the toner concentration detector with a reference value stored in the memory, and as a compensation unit that corrects a difference between output values of the toner concentration detector at two or more process linear velocities including a standard linear velocity, wherein a compensation amount for correcting the difference between output values of the toner concentration detector that differ depending on the process linear velocity is determined using a precomputed look-up table in accordance with the toner concentration in the development unit, wherein the look-up table includes a plurality of entries, each entry including a range of toner concentration values stored in association with a corresponding compensation amount.