Patent ID: 9671752
Date: 2017-06-06
CPC Classifications: G03G

Claim:
1. An optical writing device comprising: a plurality of light emitting elements being arranged linearly in a main scanning direction, wherein an amount of light emitting of the plurality of light emitting elements changes by self-generated heat, and the plurality of light emitting elements are divided into a plurality of groups, each of the groups includes a prescribed number of light emitting elements which are arranged in the main scanning direction, the optical writing device further comprising: a control unit for calculating an amount of heat generation of the plurality of light emitting elements for each of the groups from clock time t0 to clock time t0+Δt, wherein the control unit further calculates a temperature for each of the groups at the clock time t0+Δt, based on the amount of heat generation from the clock time t0 to the clock time t0+Δt and a temperature at the clock time t0.