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.
(BM-5A,BM-7 or equivalent)
Center of the screen
Note 5 Definition of contrast ratio:
： Contrast ratio is calculated with the following formula.
Contrast ratio (CR)=
Brightness on the ‘White” state
Brightness on the “Black” state
document version 1.0
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