Method and apparatus for driving edge emission type line head

Details Method and apparatus for driving edge emission type line head Method and apparatus for driving edge emission type line head

1993-10-27

1997-01-07

Fuller, Benjamin R.

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347130, B41J 2447, B41J 247

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055922104

ABSTRACT:
A method and an apparatus for driving an edge emission type line head having a plurality of edge emission type EL elements grouped in blocks. Each group of the edge emission type EL elements has a channel electrode connected to a channel driver and has a common electrode connected via a matrix circuit to common terminals of a common driver. The channel driver outputs voltages while the common driver outputs alternately a positive and a negative high voltage. If something happens to stop the function of the line head in operation, the output of the common driver is stopped after a pair of a positive and a negative high voltage is output by one common terminal, or after one-line output is effected by the common driver. This helps prolong the service life of the edge emission type EL elements constituting the line head.

REFERENCES:
patent: 4386352 (1983-05-01), Nonomura et al.
patent: 5128696 (1992-07-01), Watanabe
patent: 5138338 (1992-08-01), Mochizuki et al.
patent: 5182595 (1993-01-01), Fukuchi et al.

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