Acer B223W Service Manual page 32

Note 9:
127 gray level
l L -L
A A'
l L -L
B B'
Note 10: Optical characteristic measurement setup.
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1/2 1/6
A
B
l / L x 100%= 2% max., L
A
l / L x 100%= 2% max., L
B
Field=2˚
SP EC NO.
PAG E
2/3
1/6
1/2
127 gray level
and L are brightness at location A and A'
A A'
and L are brightness at location B and B'
B B'
Photo-detector (BM-5A)
50cm
M T 2 2 0 W W 0 1 V. 0
17/23
1/2 1/3 1/6
A'
B'
0 gray level
LCD Panel
1/6
1/3
1/2
2/3