D01-501106-01 Rev B
DSVGA Design Reference Board Manual
14
6.6.5. System Gamma
The software allows for the overall System Gamma to be set between 0.5 and 2.5
when using the Auto-Gamma feature. This System Gamma can be used to
compensate for the gamma of the input video. For example, if the source video is
gamma corrected to 2 then setting the System Gamma to 1.9 and pressing the
“Set” button will give a better overall gamma response. This does not mean that
there is a 1 to 1 relationship between input gamma and the System Gamma.
Figures 6-6 to 6-8 show the grayscale response for a display at several luminance
settings obtained by using the “Update LUT” feature and the System Gamma set
to 1.
Figure 6-6 Luminance Response for Auto Gamma at Low Luminance
AUTO GAMMA
for Low Luminance
0
5
10
15
20
25
0
50
100
150
200
250
300
GRAYSCALE
LU
M
IN
A
N
C
E
AUTO
