Light-emitting device and image forming apparatus

Details Light-emitting device and image forming apparatus Light-emitting device and image forming apparatus

2007-09-14

2011-12-13

Wang, Quan-Zhen (Department: 2629)

Computer graphics processing and selective visual display system

Plural physical display element control system

Display elements arranged in matrix

C345S076000

Reexamination Certificate

active

08077125

ABSTRACT:
Disclosed herein is a light-emitting device including: a plurality of light-emitting elements which emit light with light intensities according to the levels of driving currents; a plurality of current generation circuits which are provided in correspondence with the plurality of light-emitting elements, have a plurality of current sources, and combine currents output from the plurality of current sources to output the combined currents as the driving currents; and a plurality of memories which store control signals for controlling the currents output from the plurality of current sources; wherein the levels of the currents of the plurality of current sources are different from one another, and wherein at least one of the plurality of memories is commonly connected to the current sources corresponding to predetermined current in at least two of the plurality of current generation circuits.

REFERENCES:
patent: 5708451 (1998-01-01), Baldi
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patent: 2003/0048669 (2003-03-01), Abe
patent: 2006/0158395 (2006-07-01), Kubota et al.
patent: 2007/0109231 (2007-05-01), Miyazawa
patent: 2007/0176865 (2007-08-01), Chino et al.
patent: 2007/0262934 (2007-11-01), Fujikawa et al.
patent: A 2005-283816 (2005-10-01), None

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