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4-2. Outline of AIDC Control
• The following AIDC controls are provided to ensure image stabilization.
(1) Ds correction control
• Sets a developing bias optimum to prevent foggy print or uneven density.
(2) LED intensity adjustment control
• Adjusts the intensity of the LED light of the AIDC sensor to ensure a constant output
value on the surface of the Image Transfer Belt (no toner area). This controls variations
in characteristics of the belt caused by change with time or contamination of the sensor.
(3) Belt surface (no toner area) reflection factor measurement control
• Measures variations in the reflection factor caused by change with time of the Image
Transfer Belt for use for corrections in the laser intensity control and
γ correction control.
(4) Solid image toner amount control
• Adjusts the pulse width ratio of the developing bias to keep constant the amount of toner
sticking to the surface of the PC Drum for a 100% solid image.
(5) Laser intensity adjustment control
• Adjusts the intensity of the laser light to ensure constant reproduction of black and white
lines and constant toner consumption characteristics with changes in characteristics of
PC Drum, developing, and drum charging and in durability.
(6)
γ
correction control
• Makes a gradation correction by producing a pattern on the Image Transfer Belt, measur-
ing the image density of the pattern with the AIDC Sensor, and sending the measure-
ment results to the controller.
Control Description
• Ds correction control • Sets the developing bias.
• LED intensity adjustment
control
• Adjusts the intensity of the LED light.
• Belt surface (on which no
toner sticks) reflection factor
measurement control
• Used for corrections for the laser intensity and
γ cor-
rection control.
• Solid image toner amount
control
• Maintains a given amount of toner sticking to the sur-
face of the PC Drum.
• Laser intensity adjustment
control
• Ensures constant reproduction of black and white
lines.
• Adjusts the intensity of the laser light to ensure a con-
stant amount of toner consumed.
• γ correction control
• Makes a gradation correction by means of the control-
ler