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Chapter 6 Principles of Operation
- The laser beam is radiated according to the printing data (image data) output from the printer
controller. The laser beam is output only when printing data is pixels (micro points composing
characters or pictures). (The laser diode lights up for parts to be developed by toner, and not for
parts that are not to be developed.)
The drum surface radiated by the laser beam becomes a conductor, and the negative charge on
the drum surface flows to the positive side and the charges negate each other so that the potential
on the drum surface drops. The part on the surface where potential drops becomes the
electrostatic latent image.
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Leg_Sec06_012FA
Potential on
drum surface
(Laser beam)
Leg_Sec06_011FA
Drum surface
(Laser beam)
Electrostatic
latent image