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

• Manufacturer Part Number: NL6448BC33-70
• Description: 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
on the same screen point, by photo-detector. Ton is the time it takes the luminance change from
90% down to 10%. Also Toff is the time it takes the luminance change from 10% up to 90% (See
the following diagram.).
Response time is measured, the luminance changes from "white" to "black", or "black" to "white"
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.
Luminance uniformity (LU) =
Contrast ratio (CR) =
Luminance
Black
White
PRELIMINARY DATA SHEET DOD-PP-0863 (3rd edition)
80
400
240
Left
100%
90%
10%
Lower
0%
θD
Normal axis (Perpendicular)
106
①
④
θL
Luminance of black screen
Luminance of white screen
θU
Maximum luminance from ① to ⑤
Minimum luminance from ① to ⑤
320
Ton
③
Upper
θR
12 o’clock
533
Right
②
⑤
Toff
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