Advantech IDK-1121WP Series, User Manual

Page: 31 / 35

25 IDK-1121WP User Manual
Appendix A
LCD Optical
C
haracteristics
Note 2 9 points position
Note 3 9-point luminance uniformity is defined by dividing the maximum luminance
values by the minimum test point luminance
Note 4 Measurement method
The LCD module should be stabilized at given temperature for 20 minutes to avoid
abrupt temperature change during measuring. In order to stabilize the luminance, the
measurement should be executed after lighting the backlight for 20 minutes in a sta-
ble, windless and dark room.
Note 5 Definition of response time
Response time is defined as the following figure and shall be measured by switching
the input signal for “Gray(N)” and “Black or White”. Please refer to the figure below.
W9
=
Maximum [L (1) ~ L (9)]
Minimum [L (1) ~ L (9)]