LQ104S1DG31 Sharp Microelectronics, LQ104S1DG31 Datasheet - Page 9

• Manufacturer Part Number: LQ104S1DG31
• Description: LCD Graphic Display Modules & Accessories 10.4 2 x CCFT SVGA 450 nits
• Manufacturer: Sharp Microelectronics

Specifications of LQ104S1DG31

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7. 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 L × VL)
[Note3] Lamp frequency may produce interference with horizontal synchronous frequency,and this may cause
[Note4] The open output voltage of the inverter shall be maintained for more than 1s; otherwise
[Note5] Lamp is consumables. In the following condition, the lamp life time is 50,000 hour as the reference value
[Note6] The performance of the backlight, for example life time or brightness, is much influenced by the
[Note7] It is required to have the inverter designed so that to allow the impedance deviation of the two CCFT lamps
[Note8] Under the environment of 10lx or less, miss-lighting delay may occur.
Parameter
Lamp current
Lamp power consumption
Lamp frequency
Kick-off voltage
The characteristics of single lamp are shown in the following table.
(It is usually required to measure under the following condition. IL=6.0mA,Ta=25℃±2℃,FL=60kHz.)
The backlight system is an edge-lighting type with double CCFT (Cold Cathode Fluorescent Tube).
Module
Otherwise, when one side of the CCFT is open, the excess current may possibly be applied to the other
side of the lamp.
and it is not guaranteed in this specification sheet by SHARP.
Recommended inverter is “CXA-0454 (TDK)”.
(“CXA-P1212B-WJL(TDK)” is also recommended under general temperature condition.)
Above value is applicable when lamp is placed horizontally.
The data don’t include loss at inverter. ( IL=6.0mArms)
beat on 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.
the lamp may not be turned on.
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
and the brightness becomes lower.
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.
and 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.)
(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
CN2,3：1pin
CN2,3：2pin
Symbol
PL
FL
Vs
IL
Ａ
∼
o
C exceeds maximum value, 1300Vrms.
o
Min.
C, IL=6.0mA rms)
3.0
35
-
-
-
Ｖ
∼
Typ.
6.0
2.8
60
-
-
Inverter
output voltage
(2000)
Max.
1300
6.5
70
-
mA rms
V rms
Unit
kHz
W
Ｖ
∼
Barast capacitor=12pF
Transformer output
Transformer
output voltage
Inverter output
Inverter
Remark
[Note1]
[Note2]
[Note3]
Ta=-30
[Note4]
o
C