LQ150X1LG71 Sharp Electronics, LQ150X1LG71 Datasheet - Page 13

• Manufacturer Part Number: LQ150X1LG71
• Manufacturer: Sharp Electronics

Specifications of LQ150X1LG71

• Lead Free Status / Rohs Status: Compliant

【Note1】A lamp can be light in the range of lamp current shown above.
【Note2】Referential data per one CCFT by calculation ( I
【Note3】Lamp frequency of inverter may produce interference with horizontal synchronous frequency, and this
【Note4】The open output voltage of the inverter shall be maintained for more than 1s; otherwise
【Note5】Above value is applicable when lamp is placed horizontally.
【Note6】The performance of the backlight, for example life time or brightness, is much influenced
【Note7】It is required to have the inverter designed so that to allow the impedance deviation of the two CCFT
7-2. Backlight
Lamp current range
Lamp voltage
Lamp power consumption
Lamp frequency
Kick-off voltage
Lamp life time
The back light system is an edge-lighting type with 2 CCFTs (Cold Cathode Fluorescent Tube).
The characteristics of the lamp are shown in the following table.
The value mentioned below is at the case of one CCFT.
Parameter
Maximum rating for current is measured by high frequency current measurement equipment
connected to V
(Note : To keep enough kick-off voltage and necessary steady voltage for CCFT.)
The data don’t include loss at inverter. (I
the lamp may not be turned on.
Lamp life time is defined that it applied either ① or ② under this condition
(Continuous turning on at Ta=25
(Lamp life time may vary if lamp is in portrait position due to the change of mercury density inside
Lamp life time shortens according to the state of mounting and use.
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 lamp exchange is recommended.
by the characteristics of the DC-AC inverter for the lamp. When you design or order the inverter,
please make sure that a poor 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.
Be sure to use a back light power supply with the safety protection circuit such as the detection circuit
for the excess voltage, excess current and or electric discharge waveform.
Be sure to use the detect circuit by which one side of the CCFT lamps can be controlled independently.
Otherwise, when one side of the CCFT is open, the excess current may possibly be applied to the other
side of the lamp.
lamps and the capacity deviation of barast capacitor.
may cause horizontal beat on the display. Therefore, adjust lamp frequency, and keep inverter as far as
from module or use electronic shielding between inverter and module to avoid interference.
Panel surface temperature : 0∼60℃
① Brightness becomes 50% of the original value under standard condition.
② Kick-off voltage at Ta=0
the lamp.)
Module
LOW
Symbol
at circuit showed below.
CN2,：1pin
CN2,：2pin
V
Vs
P
F
T
I
L
L
L
L
L
50,000
o
Min.
C exceeds maximum value, (1,400)Vrms.
3.5
−
−
40
−
o
C, I
Ａ
∼
L
=6.5mArms)
Typ.
660
L
6.5
4.3
55
−
−
=6.5 mArms)
L
Ｖ
∼
Max.
1,400
× V
7.5
−
−
70
−
Inverter
output voltage
L
) .
mArms 【Note1】
Vrms
Vrms
hour
kHz
Unit
W
【Note2】
【Note3】
【Note5】
I
Transformer output 【Note4】 Ta=0℃
L
=6.5 mArms Ta=25℃ 55kHz
Inverter
Remark
LD19918A-10