Control of a light emitting diode array

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

1981-08-14

1984-06-19

Tarcza, Thomas H.

Recorders

Electric recording

Electrochemical

346107R, 346160, G01D 1514

Patent

active

044555628

ABSTRACT:
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.

REFERENCES:
patent: 3803631 (1974-04-01), Nucklos et al.
patent: 3952311 (1974-04-01), Lapeyre
patent: 3988742 (1976-10-01), Meier et al.
patent: 4107687 (1977-07-01), Pfeifer et al.
patent: 4386272 (1983-05-01), Check, Jr. et al.
Koebiltz, Technology of Asynchronous Ink Jet Printing, Second International Conference on Electrophotography, pp. 179-183, Oct. 24-27, 1973.

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