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(2) Definition of Contrast Ratio (CR):
The contrast ratio can be calculated by the following expression and figure below.
Contrast Ratio (CR) = L255 / L0
L255: Luminance of gray level 255
L 0: Luminance of gray level 0
CR = CR (1)
CR (X) is corresponding to the Contrast Ratio of the point X at Figure in Note (5).
The position of measuring area corner: X=10.0mm ; Y=10.0mm
Luminance of center point: L=L(1)
Brightness Uniformity Measurement points: Thirteen specified points 1-13
Formula: Maximum [L (1), L (2), L (3), L (4), L (5), L (6), L (7), L (8), L (9), L (10), L (11),
L (12), L (13)]/Minimum [L (1), L (2), L (3), L (4), L (5), L (6), L (7), L (8), L (9), L (10),
L (11), L (12), L (13)]
ctive area
Vertical Line Number
ixel
Horizontal Line Number [pixel]
: test point
(Minolta CA-210)
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