Adjustment of exposure power in a LED printer

摘要

An exposure device for a non-impact printing apparatus comprises a plurality of light-emitting elements for forming images, driver means for individually applying energy output levels to the light-emitting elements, lens means for focussing the light emitted by the light-emitting elements, storage means for storing a list comprising setting values for setting said energy output levels. Said list consists of a plurality of series of setting values, each one of said series enabling to attribute at least one setting value to each one of the light-emitting elements, each one of said series being selectable as a function of an exposure device condition. The invention also relates to a method for adjusting a non-impact printing apparatus. The method comprises the step of selecting a most adequate series of setting values on the basis of an analysis of the optical density of printed images on a receiving medium. <IMAGE>