eMagin Corporation
SXGA120-120 Reference Board
D01-500947-07 Rev A
SXGA120120 Design Reference Board User
’
s Manual
16
Figure 6-4 Luminance vs Manual Vcom
Gamma
To compensate for the non-linear dependency of luminance on the voltage of the
OLED diode, the R, G and B signals include internal gamma correction to
linearize the pixel response as a function of the input video signal. This gamma
correction takes place in the FPGA.
The gamma correction consists of a nine segment piece-wise-linear function whose
parameters are set from the pull-down menu or via registers in the “Gamma” panel on
the windows software. All three color channels have the same PWL shape.
There are multiple ways to set the Gamma using the windows software. The Gamma
section of the software is shown below.