7.2 POWER ON/OFF SEQUENCE
Doc No.: 44087312
Issued Date: Oct, 20, 2008
Model No.: N140B6 -L02
Approval
- Power Supply
for LCD, Vcc
0V
Power On
90%
10%
t1
t2
Power Off Restart
90%
t7
10%
10%
t4
t3
- LVDS Interface 0V
- Power for Light Bar
Valid Data
t5
t6
50%
50%
OFF
ON
OFF
Timing Specifications:
0.5≦ t1 ≦ 10 ms
0 ≦ t2 ≦ 50 ms
0 ≦ t3 ≦ 50 ms
t4 ≧ 500 ms
t5 ≧ 200 ms
t6 ≧ 200 ms
Note (1) Please follow the power on/off sequence described above. Otherwise, the LCD module might be
damaged.
Note (2) Please avoid floating state of interface signal at invalid period. When the interface signal is invalid, be
sure to pull down the power supply of LCD Vcc to 0 V.
Note (3) The Backlight converter power must be turned on after the power supply for the logic and the
interface signal is valid. The Backlight converter power must be turned off before the power supply
for the logic and the interface signal is invalid.
Note (4) Sometimes some slight noise shows when LCD is turned off (even backlight is already off). To
avoid this phenomenon, we suggest that the Vcc falling time is better to follow 50 us≦t7≦10 ms.
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Version 2.0