Ackermann Instrumente GmbH
•
Eisenbahnstr 65-67
•
78604 Weilheim Germany
Tel. : +49-7461-96617-0
•
Fax. : +49-7461-96617-70
•
email.: info@ackermanninstrumente .de
Side 23of 33
5.4
Optical Specifications
Optical characteristics are determined after the unit has been ‘ON’ and stable for approximately 30 minutes in a dark
environment at 25℃. The values specified are at an approximate distance 50cm from the LCD surface at a viewing
angle of
Φ
and
θ
equal to 0
°
.
Appendix A presents additional information concerening the speciffied charateristics.
Table 2 OPTICAL CHARACTERISTICS
Parameter
Symbol
Values
Units
Notes
Min.
Typ.
Max.
Contrast Ratio
Surface Brightness, white
Brightness Variation
Response Time
Rise Time
Decay Time
CIE Color Coordinates
Red
Green
Blue
White
Viewing Angle
x axis, right (Φ=0º)
x axis, left(Φ=180º)
y axis, up(Φ=90º)
y axis, down (Φ=270º)
CR
SB
WH
SB
V
Tr
Tr
R
Tr
D
x
R
y
R
x
G
y
G
x
B
y
B
x
W
y
W
θ
θ
θ
θ
180
-
-
-
0.573
0.314
0.283
0.521
0.110
0.106
0.292
0.326
70
70
70
70
200
200(TB
D)
-
50
20
30
0.603
0.344
0.313
0.551
0.140
0.136
0.322
0.356
-
-
-
-
-
-
30
70
30
40
0.633
0.374
0.343
0.581
0.170
0.166
0.352
0.386
-
-
-
-
cd/m
2
%
msec
degree, °
1
2
3
4
5
Notes 1. Contrast Ratio (CR) is defined mathematically as:
(Surface Brightness with all white pixels)
(Surface Brightness with all black pixels)
2. Surface brightness is the average of 5 measurement across the LCD surface
50cm from the surface with all pixels displaying white.
3. The variation in surface brightness, SB
V
is determined by measuring B
ON
at
each test position 0 through 12, and then dividing the maximum B
ON
- minimum B
ON
by the
average B
ON
.
Maximum (B
ON0
, B
ON1
, ....B
ON12
) - Minimum (B
ON0
, B
ON1
, ....B
ON12
)
Average (B
ON0
, B
ON1
, ....B
ON12
)
4. Response time is the time required for the display to transition from white
to black(Rise Time, Tr
R
) and from black to white (Decay Time, Tr
D
). For
additional information see Appendix A.
5. Viewing angle is the angle at which the contrast ratio is greater than 10. The
angles are determined for the horizontal or x axis and the vertical or y axis with
respect to the z axis which is normal to the LCD surface.