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LM185WH1 Datasheet(PDF) 24 Page - LG Semicon Co.,Ltd.

Part No. LM185WH1
Description  SPECIFICATION FOR APPROVAL
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Maker  LG [LG Semicon Co.,Ltd.]
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Product Specification
25 / 32
LM185WH1
Liquid Crystal Display
Ver. 1.0
Sep., 10, 2008
Notes :
8. Color grayscale linearity , Δu’v’ is defined as
Where indices A and B are the two gray levels found to have the largest color differences
between them.
i.e. get the largest Δu’ and Δv’ of each 6pairs of u’ and v’ and calculate Δu’v’ .
-Test pattern :
100% full white pattern with a test pattern as shown FIG.12
Squares of 40mm by 40mm in size, filled with 255, 225, 195, 165, 135 and 105
grayscale steps should be arranged in the center of the screen.
-Test method :
First gray step :
Move a square of 255 gray level should be moved into the center of the screen
and measure luminance and u’ and v’ coordinates.
Next gray step :
Move a 255 gray square into the center and measure both luminance and
u’ and v’ coordinates.
The same procedure shall then be repeated for gray steps 195, 165, 135 and 105.
2
2
)
'
'
(
)
'
'
(
B
A
B
A
v
v
u
u
+
FIG. 12 Color grayscale linearity
40mm
40mm




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