NL128102BC29_01 NEC, NL128102BC29_01 Datasheet - Page 21

• Manufacturer Part Number: NL128102BC29_01
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

4.10.2 Definition of contrast ratio
4.10.3 Definition of luminance uniformity
4.10.4 Definition of response times
4.10.5 Definition of viewing angles
The contrast ratio is calculated by using the following formula.
The luminance uniformity is calculated by using following formula.
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.).
Response time is measured, the luminance changes from " black " to " white ", or " white " to " black "
The luminance is measured at near the 5 points shown below.
Contrast ratio (CR) =
Luminance uniformity (LU) =
Luminance
Left
Lower
Black
White
Normal axis (Perpendicular)
853
512
171
θD
PRELIMINARY DATA SHEET DOD-PD-0410 (2nd edition)
θL
100%
90%
10%
0%
213
①
θU
④
Luminance of white screen
Luminance of black screen
Upper
θR
640
③
12 o’clock
Maximum luminance from①
Minimum luminance from ①
Ton
Right
1067
②
⑤
to
to
Toff
⑤
⑤
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