Incremental printing of symbolic information – Light or beam marking apparatus or processes – Scan of light
Reexamination Certificate
2007-11-27
2007-11-27
Pham, Hai (Department: 2861)
Incremental printing of symbolic information
Light or beam marking apparatus or processes
Scan of light
C347S247000
Reexamination Certificate
active
11219206
ABSTRACT:
A light source control apparatus for controlling the output of a light source for forming an electrostatic latent image on an image carrying member in an electrophotographic image forming apparatus, the light source control apparatus according to the present invention including a storing unit that stores first drive control data of the light source on two or more positions of the image carrying member, an interpolating that generates second drive control data on at least one interpolation position between the two or more positions based on the first drive control data, a digital-analog converting unit that converts the first and second drive control data to an analog signal, a low-pass filter that cuts a high-frequency component of the analog signal outputted from the digital-analog converting unit, and a driving unit that drives the light source in response to the analog signal from which the high-frequency component has been cut by the low-pass filter, wherein the low-pass filter has a cut-off frequency higher than a frequency for sampling on the two or more adjacent positions on the image carrying member and lower than a frequency for sampling on the two or more positions and the interpolation position.
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Hata Shigeo
Koga Katsuhide
Canon Kabushiki Kaisha
Pham Hai
Rossi Kimms & McDowell LLP
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