Konica Minolta 5430 DL 5440 DL 5450 - Manual (Page 72)

Main Unit Theory of Operation Toner Cartridge / Developing Unit
2-35
II Comp
osition
/O
p
eration
7.2.6 Gamma correction control
• A gradation pattern is produced on the surface of the Transfer Belt. The AIDC Sensor
measures the density of this pattern and transmits the results of measurement to the
controller for gradation correction.
• The gamma correction is controlled integrally with other control items by the image stabi-
lization control.
• The gamma correction control is performed when there is a request made for execution
of image stabilization sequence.
☞ 2-120
A. Correction control
1.
A detection pattern of each color of toner is produced on the surface of the Transfer
Belt.
2. The detection pattern is detected by the AIDC Sensor.
3. The mean value of the readings taken is calculated.
4. Noise is removed from the mean value.
5. Rearrange the readings in descending order.
6. Normalize the readings.
Start
Remove noise.
Produce the detection pattern
and detect it.
End
Rearrange readings.
Normalize readings.
Average out the AIDC output value
for each gradation level.
4138to2141e0
5430DL_5440DL_5450_TO_PDF.book 35 ページ ２００５年４月１２日 火曜日 午後４時４９分