Sharp XG-V10WU Technical Manual page 45

[Processor of color irregularity correction]
In the projector, the correction data will be added to the video signal at the following two parts before sending the
signals to LCD panel.
1. Color irregularity correction IC (Digital processing)
2. Color irregularity NOKO correction circuit (Analog processing)
Block diagram of color irregularity correction
R, G, B
video signal
[Screen comparison before and after the correction]
(When displaying all gray screen)
Before the correction, there were a greenish area at bottom left and a bluish area at
top right. After the correction, there is no area in the entire screen having such colora-
tion, indicating color irregularity has been reduced.
[Color irregularity correction data]
Divide the display screen (SXGA: 1280 x 1024, RGB 3 colors each) into the blocks as shown below.
H Size2
H Size1
The correction data for each pixel, which is made by interpolating the correction data for the above
block, is then added to each pixel.
Color irregularity correction
IC (IX3399) [IC8029]
Color irregularity
correction data
+
(Digital processing)
Before correction
29
block
H Size2
H Size1
Color irregularity
NOKO correction circuit
Color irregularity
NOKO correction data
D/A +
(Analog processing)
After correction
V Size2
V Size2
V Size1 = 22 line
V Size2 = 49 line
22 block H Size1 = 46 dot
H Size2 = 19 dot
V Size2
V Size2
V Size1
45
XG-V10WU
XG-V10WE
R, G, B on
LCD panel