NL6448BC33-70F NEC, NL6448BC33-70F Datasheet - Page 23

• Manufacturer Part Number: NL6448BC33-70F
• Description: Display Module
• Manufacturer: NEC

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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.
The luminance is measured at near the 5 points shown below.
"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.).
Response time is measured at the time when the luminance changes from "white" to "black", or
Luminance
Contrast ratio (CR) =
Luminance uniformity (LU) =
Black
White
Left
Lower
Normal axis (Perpendicular)
100%
10%
90%
0%
θD
240
400
80
θL
θU
DATA SHEET DOD-PP-0950 (1st edition)
106
①
④
Upper
Luminance of white screen
Luminance of black screen
θR
Ton
12 o’clock
320
③
Right
Maximum luminance from ① to ⑤
Minimum luminance from ① to ⑤
533
②
⑤
Toff
NL6448BC33-70F
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