OKIDATA OKIPAGE 20, Руководство по обслуживанию

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(2) Transfer of correction data to head driver correction data
The LED driver corrects the LED illumination by controlling the LED current. The LED illumination can be
set in 16 steps, with 7 steps in the direction of illumination increase in relation to the standard value, and 8
steps in the direction of decrease. For this reason, the LED correction data is a 4-bit data for each dot.
The relationship between the LED correction data and LED current correction steps with the LED driver
used in an LED head is shown below.
Correction Data
msb b3 b2 b1 lsb b0
Correction
Step Correction
Mode
1 0 0 0 +16%
0 1 1 1 +14%
0 1 1 0 +12%
0 1 0 1 +10%
0 1 0 0 +8%
0 0 1 1 +6%
0 0 1 0 +4%
0 0 0 1 +2%
Correction
by increasing
Illumination
0 0 0 0 +0% No correction
1 1 1 1 -2%
1 1 1 0 -4%
1 1 0 1 -6%
1 1 0 0 -8%
1 0 1 1 -10%