3.Optical Specif ications
3.1.LCD Driving Voltage
Parameter
Recommended
LCD Driving Voltage
V
DD
-V
0
Symbol
Conditions
Ta= 0℃
Ta=25℃
Min.
－
3.9
Typ.
－
4.2
Max.
4.8
4.5
Units
V
V
Note 1
Ta=50℃
3.6
V
－
－
Note 1 :
Voltage (Applied actual waveform to LCD Module) for the best contrast. The range of
minimum and maximum shows tolerance of the operating voltage. The specified contrast ratio and
response time are not guaranteed over the entire range.
3.2.Optical Characteristics
Ta=25℃, 1/16 Duty, 1/4 Bias, V
D
=4.2V (Note 4),
θ=
0
ﾟ, φ=－ﾟ
Parameter
Contrast Ratio
Viewing Angle
Response
Rise
Note 2
T
ON
－
Note 1
Symbol
CR
Conditions
θ=
0
ﾟ, φ=－ﾟ
Min.
－
Typ.
7
Max.
－
Units
Shown in 3.3
－
130
200
ms
Time
Decay Note 3
T
OFF
130
200
ms
－
－
Note 1 : Contrast ratio is definded as follows.
CR = L
OFF
/ L
ON
L
ON
: Luminance of the ON segments
L
OFF
: Luminance of the OFF segments
Note 2 : The time that the luminance level reaches 90% of the saturation level from 0% when ON
signal is applied.
Note 3 : The time that the luminance level reaches 10% of the saturation level from 100% when OFF
signal is applied.
Note 4 : Definition of Driving Voltage V
D
Assuming that the typical driving waveforms shown below are applied to the LCD Panel at
1/A Duty - 1/B Bias ( A : Duty Number, B : Bias Number ). Driving voltage V
D
is definded
as follows.
V
D
= (Vth1+Vth2) / 2
Vth1 : The voltage V
O-P
that should provide 50% of the saturation level in the luminance at
the segment which the ON signal is applied to.
Vth2 : The voltage V
O-P
that should provide 50% of the saturation level in the luminance at
the segment which the OFF signal is applied to.
V
O-P
( B-2 )
×
V
O-P
/ B
1 / (
f
F
×
A )
1 /
f
F
〈
ON SIGNAL
〉
〈
OFF SIGNAL
〉
DMC-50448N (AA) No.99-0094
OPTREX
OPTREX CORPORATION
Page 5/15
OPTEK [ OPTEK TECHNOLOGIES ]
