Limos I And New Screen Limos - Minolta CF910 Service Manual

1154SBM1005A

10-5. LIMOS I and New Screen LIMOS

• "9. Image Area Discrimination" as part of the IR image processing functions performed
by the IR discriminates the image area and, based on this discrimination, either LIMOS I
or New Screen LIMOS is selected. The following outlines the control for turning ON the
LD1 for LIMOS I and New Screen LIMOS.
LIMOS I
Theory
Processing Area
Schematic Drawing
New Screen LIMOS
Theory
Processing Area
Schematic Drawing
The intensity of the LD1 light is modulated at a ratio of 1 to 1 for
each pixel with respect to the image density data.
Character area (color/monochrome)
(Image Density Data)
255
A B
0
A
• The intensity of the LD1 light is modulated at a ratio of 1 to 1/4 for
each pixel with respect to the image density data.
• The center of illumination point deviates in the main scanning
direction.
• The screen angle in the sub-scanning direction is made at an
angle which human eyes do not readily perceive, thereby making
the image texture by a straight line pattern less conspicuous.
• Color moire is reduced by deviating the screen angle and center
of illumination point.
Dot area (color/monochrome), continuous gradation area (color/
monochrome)
(Image Density Data)
255
A B
0
A
M-48
255
C A
0
B C
255
C A B
0
B C
B C
1144M159CA
C
1144M160CB