LC470EUF
Product Specification
3-6. Power Sequence
3-6-1. LCD Driving circuit
90%
10%
90%
10%
Power Supply For LCD
VLCD
10%
0V
T8
T1
T5
Vcm : LVDS Common mode Voltage
T2
Valid Data
30%
Interface Signal (Tx_clock)
0V
100%
T3
T4
T6
User Control Signal
(LVDS_select, BIT _select)
LED ON
T7
Power for LED
Table 8. POWER SEQUENCE
Parameter
Value
Typ
Unit
Notes
Min
Max
T1
T2
T3
T4
T5
T6
T7
T8
0.5
0
-
-
-
-
-
-
-
-
20
ms
ms
ms
ms
s
1
2
3
3
4
5
6
7
-
-
200
200
1.0
-
-
-
T2
-
ms
s
0.5
100
-
ms
1. Even though T1 is over the specified value, there is no problem if I2T spec of fuse is satisfied.
2. If T2 is satisfied with specification after removing LVDS Cable, there is no problem.
3. The T3 / T4 is recommended value, the case when failed to meet a minimum specification,
Note :
abnormal display would be shown. There is no reliability problem.
4. T5 should be measured after the Module has been fully discharged between power off and on period.
5. If the on time of signals (Interface signal and user control signals) precedes the on time of Power (VLCD),
it will be happened abnormal display. When T6 is NC status, T6 doesn’t need to be measured.
6. If there is no abnormal display, no problem.
7. It is recommendation specification that T8 has to be 100ms as a minimum value.
※ Please avoid floating state of interface signal at invalid period.
※ When the power supply for LCD (VLCD) is off, be sure to pull down the valid and invalid data to 0V.
16 /40
Ver. 1.5
LG [ LG SEMICON CO.,LTD. ]
