Light-emitting element head, image forming apparatus and signal supply method
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United States of America Patent
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Aug 23, 2011
Grant Date -
May 13, 2010
app pub date -
May 19, 2009
filing date -
Nov 11, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
The light-emitting element head includes: a first signal supply unit supplying a first signal for sequentially specifying a plurality of light-emitting elements one by one as a control target for control in common to light-emitting element chips; a second signal supply unit supplying second signals for giving an instruction to emit or not to emit light to one of the elements specified as the control target to a set of light-emitting element chips so that each of the signals is supplied in common to plural light-emitting element chips belonging to each of N groups into which the set of chips are divided; and an enable signal supply unit that supplies enable signals for allowing the set of chips to receive the second signals which are different from one another so that the enable signals are supplied respectively to the chips belonging to each of the N groups.
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