Figure 7-4. sample matrix causing flickering -21, Lem shown in, Figure 7-4 – Cirrus Logic EP93xx User Manual
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Copyright 2007 Cirrus Logic
Raster Engine With Analog/LCD Integrated Timing and Interface
EP93xx User’s Guide
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Figure 7-4. Sample Matrix Causing Flickering
To minimize these type of spatial interference patterns, it is better to mix up the pattern
sequence similar to that shown in
. Note that the pattern mixes sets of two adjacent
pixels with sets of every other pixel. Depending on the display and patterns displayed, this
may create another type of apparent image distortion referred to as a walking pattern. One of
the matrix indices may need to be changed to count by 3 to eliminate this combination of
temporal and spatial distortion.
Figure 7-5. Sample Matrix That Avoids Flickering
Frame 0
H
O R Z
Frame 1
V
1
0
1
0
0
1
0
1
E
1
0
1
0
0
1
0
1
R
1
0
1
0
0
1
0
1
T
1
0
1
0
0
1
0
1
Frame 2
Frame 3
1
0
1
0
0
1
0
1
1
0
1
0
0
1
0
1
1
0
1
0
0
1
0
1
1
0
1
0
0
1
0
1
Frame 00
H
0
0
O
0
1
R
1
0
Z
1
1
Frame 01
V 00
1
1
0
0
0
0
1
1
E 01
1
0
1
0
0
1
0
1
R 10
0
0
1
1
1
1
0
0
T 11
1
0
1
0
0
1
0
1
Frame 10
Frame 11
1
0
1
0
0
1
0
1
1
1
0
0
0
0
1
1
1
0
1
0
0
1
0
1
0
0
1
1
1
1
0
0