4-2.

Outline of AIDC Control

• The following AIDC controls are provided to ensure image stabilization.

 

 

 

 

 

 

 

Control

 

Description

 

 

 

 

Ds correction control

Sets the developing bias.

 

 

 

 

LED intensity adjustment

• Adjusts the intensity of the LED light.

 

control

 

 

 

 

 

 

 

 

• Belt surface (on which no

Used for corrections for the laser intensity and γ cor-

 

toner sticks) reflection factor

 

measurement control

 

rection control.

 

 

 

 

 

 

 

Solid image toner amount

Maintains a given amount of toner sticking to the sur-

 

control

 

 

face of the PC Drum.

 

 

 

 

 

 

 

 

Ensures constant reproduction of black and white

Laser intensity adjustment

 

lines.

 

control

 

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

 

 

 

 

 

 

 

 

 

(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.

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