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Note 3: Definition of Response time
The response time is defined as the LCD optical switching time interval
between “White” state and “Black” state. Rise time (T
ON
) is the time between
photo detector output intensity changed from 90% to 10%. And fall time (T
OFF
) is
the time between photo detector output intensity changed from 10% to 90%.
Fig. 4-3 Definition of response time
Note 4: Definition of contrast ratio
state Black"" the on LCD whenmeasured Luminance
state White"" the on LCD whenmeasured Luminance
(CR) ratio Contrast =
Note 5: Definition of color chromaticity (CIE1931)
Color coordinates measured at center point of LCD.
Note 6: All input terminals LCD panel must be ground while measuring the center area of
the panel. The LED driving condition is I
L
=40mA .
100%
90%
10%
0%
Photo detector output
(Relative value)
T
ON
T
OFF
White (TFT OFF)
Black (TFT ON)
White (TFT OFF)
