LQ104S1DG2A Sharp Electronics, LQ104S1DG2A Datasheet - Page 9

• Manufacturer Part Number: LQ104S1DG2A
• Manufacturer: Sharp Electronics

Specifications of LQ104S1DG2A

• Lead Free Status / Rohs Status: Compliant

6-2. Backlight driving
[Note1] Lamp current is measured with current meter for high frequency as shown below.
[Note2] Referential data per one CCFT by calculation. (I
[Note3] Lamp frequency may produce interference with horizontal synchronous frequency, and this may cause beat on
[Note4] The open output voltage of the inverter shall be maintained for more than 1s;
[Note5] Lamp is consumables. In the following condition, the lamp life time is 50,000 hours as the reference value
[Note6] The performance of the backlight, for example life time or brightness, is much influenced by the characteristics
[Note7] It is required to have the inverter designed so that to allow the impedance deviation of the two CCFT lamps and
[Note8] Please make it to the structure not touching directly insulating the high voltage part.
[Note9] Under the environment of 10lx or less, miss-lighting delay may occur.
Parameter
Lamp current
Lamp power consumption
Lamp frequency
Kick-off voltage
The backlight system is an edge-lighting type with double CCFT (Cold Cathode Fluorescent Tube).
The characteristics of single lamp are shown in the following table.
(It is usually required to measure under the following condition.
Module
Otherwise, when one side of the CCFT is open, the excess current may possibly be applied to the other side of the lamp.
Please stop the circuit by the protection element such as fuses for generation of heat and the ignition prevention,
and use a flame resisting and high material for the substrate and the resin material.
Above value is applicable when lamp (the long side of LCD module) is placed horizontally. (Landscape position)
The data don’t include loss at inverter. (I
the display. Therefore lamp frequency shall be detached as much as possible from the horizontal synchronous
frequency and from the harmonics of horizontal synchronous to avoid interference.
otherwise the lamp may not be turned on.
and it is not guaranteed in this specification sheet by SHARP.
Lamp life time is defined that it applied either ① or ② under this condition.
In case of operating under lower temp environment, the lamp exhaustion is accelerated
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.
the capacity deviation of barast capacitor.
(Lamp lifetime may vary if lamp is in portrait position due to the change of mercury density inside the lamp.)
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.
Lamp life time shortens according to the state of mounting and use.
(Continuous turning on at Ta = 25
① Brightness becomes 50% of the original value under standard condition.
② Kick-off voltage at Ta = -30
CN2,3：2pin（Low）
CN2,3：1pin（High）
Symbol
Vs
P
F
I
L
L
L
Ａ
∼
o
C exceeds maximum value (1300Vrms).
Min.
3.5
35
o
-
-
C, I
L
L
= 6.0mA rms)
Ｖ
∼
= 6.0mArms)
Typ.
6.0
2.8
60
-
L
Inverter
output voltage
× V
Max.
1300
7.0
L
70
-
)
mA rms
I
V rms
L
Unit
kHz
=6.0mA,Ta=25℃±2℃,F
W
Inverter output
Inverter
Ta=-30
Remark
[Note1]
[Note2]
[Note3]
o
C
L
=60kHz.)
[Note4]
LD20903B-6