SAMSUNG Confidential
MODEL
LSC460HJ03
Doc. No
Page
23 / 42
6.4 The sequence of power on and off – Sony Model attached Reference file
To prevent a latch-up phenomena or the DC operation of the LCD Module, the power on/off sequence should
be accorded with the settings described in the diagram below.
T1 : The V
DD
rising time from 10% to 90%
T2 : The time from the point which V
DD
reach to 90% of voltage to the point which the valid data is out when
the power is on.
T3: The time from the point which the valid data is out to the point which V
DD
reach to the 90% of voltage
when the power is off.
T4: the time from the point which the Vdd decrease to the point which the Vdd increase again for windows to
restart.
※
The recommended operating condition of the back light system
T5: The time which takes for B/L to be turned on after the signal is entered when the time is on.
T6 : The time which takes until the signal is out after BL is turned off
The condition of supply voltage to enter in the module from the external system should have
the same condition as the definition of V
DD
.
Apply the voltage for the lamp within the range which the LCD operates. when the back light is turned on
before the LCD is operated or when the LCD is turned off before the back light is turned off, the display may
show the abnormal screen momentarily.
