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Note 3: Definition of response time
The output signals of BM-7 or equivalent are measured when the input signals are changed
from “Black” to “White” (rising time) and from “White” to “Black” (falling time), respectively. The
response time interval between the 10% and 90% of amplitudes. Refer to figure as below.
"White"
100%
90%
"Black"
"White"
10%
0%
TTfr
TrTf
Note 4: Definition of contrast ration
Contrast ratio is calculated with the following formula.
Brightness on the “White” state
Contrast ratio (CR)= Brightness on the “Black” state
Note 5: Definition of viewing angle
Viewing angle is the measurement of contrast ratio ≧10, at the screen center, over a
180° horizontal and 180° vertical range (off-normal viewing angles). The 180 ° viewing angle
range is broken down as follows; 90 ° (θ) horizontal left and right and 90 ° (Φ) vertical, high
(up) and low (down). The measurement direction is typically perpendicular to the display
surface with the screen rotated about its center to develop the desired measurement viewing
angle.
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