NL10276BC24-21
4.10.2 Definition of contrast ratio
The contrast ratio is calculated by using the following formula.
Luminance of white screen
Luminance of black screen
DATA SHEET DOD-PP-1157 (1st edition)
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4.10.3 Definition of luminance uniformity
The luminance uniformity is calculated by using following formula.
Maximum luminance from
①
to
⑤
Minimum luminance from
①
to
⑤
Luminance uniformity (LU) =
Contrast ratio (CR) =
The luminance is measured at near the 5 points shown below.
③
④
⑤
①
②
171
512
853
128
384
640
4.10.4 Definition of response times
Response time is measured at the time when the luminance changes from "white" to "black", or
"black" to "white" on the same screen point, by photo-detector. Ton is the time when the
luminance changes from 90% down to 10%. Also Toff is the time when the luminance changes
from 10% up to 90% (See the following diagram.).
100%
90%
10%
0%
Ton
Toff
Luminance
White
Black
4.10.5 Definition of viewing angles
Left
Upper
Lower
Normal axis (Perpendicular)
θ
U
θ
D
θ
R
θ
L
12 o’clock
Right
CN1
CN2
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