NL6448BC33-46D NEC, NL6448BC33-46D Datasheet - Page 24

• Manufacturer Part Number: NL6448BC33-46D
• Description: TFT COLOR LCD MODULE
• Manufacturer: NEC

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4.10.4 Definition of response times
4.10.2 Definition of contrast ratio
4.10.3 Definition of luminance uniformity
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 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" on
The luminance is measured at near the 5 points shown below.
Contrast ratio (CR) =
Luminance uniformity (LU) =
Luminance
Black
Left
White
400
240
Lower
80
θD
100%
Normal axis (Perpendicular)
90%
10%
0%
106
{ { { {
θL
x x x x
DATA SHEET EN0546EJ5V0DS00
θU
Luminance of white screen
Luminance of black screen
320
z z z z
Maximum luminance from
Minimum luminance from
Upper
θR
Ton
12 o’clock
| | | |
y y y y
533
Right
x x x x to | | | |
x x x x to | | | |
Toff
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