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Tandy 1400LT - Optical Characteristics; Optical Characteristics Measurement System

Tandy 1400LT
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6.
Optical Characteristics
(Refer
to Note 1-Note
4)
Ta=25"
Item Symbol Minimum Typical Maximum Unit Condition
Turn on time tON
-
100 180 ms
4=O0,
8=0"
Contrast ratio C
-
5
-
+=on,
8=0"
Visual angle range 41
42
-
Turn
off
time tOFF
130
230 ms
-35
5
41,
5
+
35
deg.
8=0",
C21.4
45
5
($2,
+
45 deg.
8=90",
Cz
1.4
-
Life time more than
50000
hour
EL back light
200
hour AClOOV, 400Hz
Life time
*NOTE Life is a time which luminescent rate reaches to 1/2 or lower against initial luminescent
34
cd/m2 on
EL
circuit's becomes 1.2 times on higher.
NOTE
1:
Optical Characteristics measurement system
LCD
Figure
A-8.
Optical Characteristics Measurement System
NOTE
2:
Definition of response time
I
llljlnr
I
ff*
!I
J-f
ljlj-rjfmjj+jj
Non-selected state
I
I
,
Selected
state
I
I
Non-selected
state
I
Figure
A-9.
Definition of Response Time
A-9

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