LQ084S3LG01 Datasheet, PDF (14/26 Pages) Sharp Electrionic Components – Strong 2 SVGA LCD Module featuring 400 nits brightness with 600:1 contrast. Full Specifications Listing

6-2. Backlight
LCY-W07802-11
The backlight system is an edge-lighting type with two CCFTs (Cold Cathode Fluorescent Tube).
The characteristics of single lamp are shown in the following table.
※Recommended inverter(TDK : CXA-0463)
Parameter
Symbol Min.
Typ.
Max.
Lamp voltage
VL
380
420
460
Lamp current
IL
3.0
6.0
6.5
Unit
V rms
mA rms
Ta=25°C
Remarks
IL=6mA rms
[Note6-7]
Lamp power consumption
PL
-
2.5
-
W
Lamp frequency
fL
50
-
80
KHz Recommend 55kHz
Kick-off voltage
Vs
-
-
890
V rms Ta=25°C [Note6-8]
[Note6-1]
-
-
1070
Ta=-30°C [Note6-8]
Lamp life time
LL
-
50,000
－
hour [Note6-9]
[Note6-7] Lamp current is measured with current meter for high frequency as shown below.
Module
①
②
④
～A
4PIN is V_LOW
DC/AC
INVERTER
[Note6-8] The open output voltage of the inverter shall be maintained for more than 1sec;
otherwise the lamp may not be turned on.
The input voltage wave forms to terminal ① and terminal ② should be in a same phase. It has
the possibility to discharge abnormally between the terminals in case of input of a reversed phase.
For the sake of the safety, please so design the inveter as to prevent abnormal discharge when one
of the two lamps is broken or reaches the end of life.
[Note6-9] The data for lamp is for your reference, because lamp is consumable component.
a) Lamp life time is defined by either 1or 2 below. (Continuous turning on at Ta=25℃, IL=6mA rms)
① When a brightness of lamp surface became 50% of the initial value under the standarｄ
condition.
②When a kick-off voltage in Ta= -30℃ exceeded maximum value ((1070) Vrms)
at the output of inverter circuitry
ｂ) In case of operating under lower temp. environment, the lamp exhaustion is accelerated and the
brightness becomes lower.
(Continuous operating for around 1 month under lower temp. condition may reduce the
brightness to half of the original brightness.)
In case of such usage under lower temp. environment, periodical lampexchange is recommended
[Note] The performance of the backlight, for example life time or brightness, is much influenced by the
characteristics of the DC-AC inverter for the lamp. When you design or order the inverter, please
make sure that an inadequate lighting caused by the mismatch of the backlight and the inverter
(miss-lighting, flicker, etc.) never occur. When you confirm it, the module should be operated in the
same condition as it is installed in your instrument.