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Electrophotography process |
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The principles behind the electrophotographic process were discovered in the
U.S. in 1938 by C. F. Carlson, and served as the basis for electrophotography
and indirect method electrostatic copying.
The composition of the process is shown
in the nearby illustration.
After a charger charges a photosensitive material,
the data to be printed is drawn on the photosensitive material by light from a
light source. This forms electrostatic images on the material (exposure), which
are made visible by toner.
There are two major light sources that are normally
used for electrophotographic imaging. |
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 LED
: This type of system uses an LED array as the light source.
Laser
: This type of system uses a semiconductor laser as the light source. |
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| Electrophotographic engine imaging process |
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