Patent ID: 6476845
Filing Date: 2002-11-05
Classification: B41J,G06K

Abstract:
A method of controlling light emitting elements in an electrophotographic print head, comprising:providing a predetermined number â€œxâ€  of programmable pulse width modulators, the predetermined number being less than the number of the light emitting elements; during preparations for printing a line, selecting the â€œxâ€  most commonly required different pulse widths for the line; mapping those of the light emitting elements requiring the selected pulse widths to corresponding ones of the pulse width modulators; mapping remaining ones of the light emitting elements to the pulse width modulators having pulse widths close to required pulse widths for those of the light emitting elements; programming the pulse width modulators with the most commonly required different pulse widths for the line; and coupling each of the programmed pulse width modulators to multiple ones of the light emitting elements based on the mappings.