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3-6. Power Sequence
3-6-1. LCD Driving circuit
Power Supply For LCD
V
LCD
Interface Signal (Tx)
Option Signal
(DISM, DCR_Enable)
Power for Lamp
Table 11. POWER SEQUENCE
Parameter
T1
T2
T3
T4
T5
T6
T7
T8
T9
Note :
1. Please avoid floating state of interface signal at invalid period.
2. When the interface signal is invalid, be sure to pull down the power supply V
3. The case when the T2/T5 exceed maximum specification, it operates protection
pattern(Black pattern) till valid signal inputted. There is no reliability problem.
4. The T3/T4 is recommended value, the case when failed to meet a minimum specification,
abnormal display would be shown. There is no reliability problem.
Ver. 1.0
Product Specification
90%
10%
0V
T
T
1
2
T
3
T
8
Min
1.0
5.0
200
200
0.5
-
1.0
89／125
T
T
5
Valid Data
T
4
T
9
Lamp ON
Value
Typ
-
-
-
-
-
-
-
0 < T8 < T2
0 < T9 < T5
LC420W02
Liquid Crystal Display
90%
10%
T
6
7
Unit
Max
20
ms
50
ms
-
ms
-
ms
50
ms
300
ms
-
s
ms
ms
to 0V.
LCD
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