AU OPTRONICS CORPORATION
Note 4: 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, and it should be measured in the center of screen.
Center of the screen
：Note 5 Definition of Average Luminance of White (YL):
，Measure the luminance of gray level 63 at 5 points YL = [L (1)+ L (2)+ L (3)+ L (4)+ L (5)] / 5
L (x) is corresponding to the luminance of the point X at Figure in Note (1).
：Note 6 Definition of contrast ratio:
Contrast ratio is calculated with the following formula.
Brightness on the “White” state
Contrast ratio (CR)=
Brightness on the “Black” state
B116XAN01.0 Document Version : 0.3
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