Control of a light emitting diode array

Details Control of a light emitting diode array Control of a light emitting diode array

G - Physics

05

D

314/43

G05D 25/02 (2006.01) B41J 2/45 (2006.01) G06K 15/12 (2006.01) H04N 1/401 (2006.01)

Patent

CA 1182512

CONTROL OF A LIGHT EMITTING DIODE ARRAY Abstract of the Disclosure This invention relates to circuitry for non-impact printers that use light emitting diodes (LED's) to produce an image on a photoconductor and for controlling the output of each LED of a light emitting diode array that is part of the printer. A binary weighted duty cycle control is used to obtain substantial uniformity in the light emitted from each LED. The binary cycle is time related so that through use of a four-bit code, sixteen outputs are available which yield sixteen periods during which an LED may be enabled.

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