Advantech IDK-2115 Series User Manual page 27

Note3 The luminance uniformity of 9 points is defined by dividing the maximum lumi-
nance values by the minimum test point luminance
=
W9
Note4 Measurement method
The LCD module should be stabilized at given temperature for 30 minutes to avoid
abrupt temperature change during measuring. In order to stabilize the luminance, the
measurement should be executed after lighting Backlight for 30 minutes in a stable,
windless and dark room. Optical Equipment: DT-100, or equivalent
Note5 Definition of response time
The output signals of photo detector are measured when the input signals are
changed from "Full Black" to "Full White" (rising time), and from "Full White" to "Full
Black "(falling time), respectively. The response time is interval between the 10% and
90% of amplitudes. Please refer to the figure as below.
%
100
90 90
Optical Optical
response response
10 10
0 0
Minimum Brightness of nine points
Maximum Brightness of nine points
Tf
White White
21
Tr Tr
Black Black
IDK-2115 User Manual
White White