Patent ID: 7053920

Claim:
A method for controlling a light emitting element of an emissive pixel of an array of emissive pixels of a printhead of a printer comprising: a first step of receiving an output of the light emitting element of the emissive pixel and generating a measurable parameter value for an output parameter; a second step of repeating the first step for a plurality of times; a third step of integrating the measurable parameter values generated in the first and second steps; a fourth step of averaging the integrated value of the third step; a fifth step of comparing the averaged value of the fourth step with a preset threshold value; and a sixth step of adjusting an input parameter of the light emitting element according to the result of the comparison in the fifth step; wherein the output of the light emitting element can decline with the aging of the light emitting element; and wherein the preset threshold value is used to maintain an approximately constant output of the light emitting element.