L.E.D. array printer with extra driver channel

Details L.E.D. array printer with extra driver channel L.E.D. array printer with extra driver channel

1990-06-26

1993-10-19

Fuller, Benjamin R.

Recorders

Light or beam recording

Including record receiver or handling means therefor

346154, G01D 1514, G01D 1500

Patent

active

052539342

ABSTRACT:
A non-impact printer apparatus is described that includes a recording head having a plurality of recording elements such as LED's for recording on a recording medium. A plurality of driver chips are provided on the head and each includes a plurality of current driving channels for selectively driving a plurality of recording elements in accordance with respective image data signals. The driver chips each further include an extra current driving channel not associated with a recording element for generating a current related to that sent to said recording elements. Monitoring of the current in the extra channel is provided to permit for changes of current to the recording elements and/or corrected image data to provide fine tuned control over uniformity of the recording elements.

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patent: 4885597 (1989-12-01), Tschang et al.
patent: 4952949 (1990-08-01), Uebbing

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