43984801TH
Rev.1
18 /
Oki Data CONFIDENTIAL
2. Operational explanation
1. Charging
Cha
rge the image drum surface by applying voltage to the charged roller that contacts the image drum
surface.
Image drum
Charged roller
Power
2. Exposure
The light emitting from the LED Head will be exposed to the negative charged image drum. When the
surface electric potential of exposed part of the image drum goes to decrease, the electrostatic latent
image complying with image signal is formed.
Image drum is coated by basic layer (UL), charge generating layer (CGL), charge transferring layer (CTL)
on the basic material aluminum. The thickness of the organic light sensor (OPC) that is consisted by
CTL and CGL is approximate 20µm.
Charged roller
LED head
LED head
Image drum
Image drum
Paper
Power
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