Acer AL1931 Manual page 11

Notes 5) Definition of Luminance of White : measure the luminance of white at
center point.
Notes 6)Definition of 9 points brightness uniformity (Measuring points: Refer to the
Note 5)
=100∗ 
B
UNI
Bmax: Maximum brightness
Bmin: Minimum brightness
Notes 7) Definition of Flicker level
=  x 100 %
F
♦ One maximum value of three estimated values.
♦ For this test ,an LMD(Light Measurement Device)is needed with adequate
response time to track any visible rate flicker component and with a voltage level
output proportional
To luminance intensity.
♦ Test Pattern: For dot inversion Driving(Gray levels of foreground dots on the
test panel
Are G22,G32,and G45)
♦ Test Point :Center point of the display area
Bmin
Bmax
Flicker Voltage
pp
LMD Voltage
dc
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