Hitachi CML175SXWB Service Manual page 10

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
9