Radiant energy – Photocells; circuits and apparatus – Solid state light source
Reexamination Certificate
2009-05-15
2011-11-15
Lee, John R (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Solid state light source
C347S249000, C347S252000
Reexamination Certificate
active
08058633
ABSTRACT:
A pulse width modulation signal generating device which generates a pulse width modulation signal for modulating laser beam according to image data includes: a cycle signal output circuit which outputs a cycle signal having a cycle corresponding to a drawing rate for drawing the image data by the laser beam; and a pulse width modulation circuit which receives supply of the image data and the cycle signal and modulates a pulse wave having a cycle determined by the cycle signal by changing duty ratio of the pulse wave based on the image data to produce the pulse width modulation signal.
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Office Action dated Jun. 23, 2011 in U.S. Appl. No. 13/023,073.
Lee John R
Oliff & Berridg,e PLC
Seiko Epson Corporation
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