NL204153BM21-01/01A
DATA SHEET DOD-PD-1318 (4th edition)
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4.14.2 Definition of contrast ratio
The contrast ratio is calculated by using the following formula.
Luminance of white screen
Luminance of black screen
4.14.3 Definition of luminance uniformity
The luminance uniformity is calculated by using following formula.
Maximum luminance from
to
ུ
Minimum luminance from
to
ུ
The luminance is measured at near the 5 points shown below.
4.14.4 Definition of response times
Response time is measured, the luminance changes from "black" to "white", or "white" to "black" on
the same screen point, by photo-detector. Ton is the time it takes the luminance change from 10% up
to 90%. Also Toff is the time it takes the luminance change from 90% down to 10% (See the following
diagram.).
4.14.5 Definition of viewing angles
ི
ཱི
ུ
ཱ
342
1,024
1,708
256
768
1,280
Left
Upper
Lower
Normal axis (Perpendicular)
T
U
T
D
T
R
T
L
12 o’clock
Right
Contrast ratio (CR) =
Luminance uniformity (LU) =
100%
90%
10%
0%
Ton
Toff
Luminance
White
Black