LQ104S1LG21 Sharp Microelectronics, LQ104S1LG21 Datasheet - Page 10

• Manufacturer Part Number: LQ104S1LG21
• Description: TFT Displays & Accessories 10.4 SVGA 350 NIT
• Manufacturer: Sharp Microelectronics

Specifications of LQ104S1LG21

• Diagonal: 10.4 in
• Viewing Area (w X H): 211.2 mm x 158.4 mm
• Pixel Density: 800 x 600
• Module Size (w X H X T): 246.5 mm x 179.4 mm x 15.5 mm
• Backlighting: White
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

7-2. 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 L
[Note3] Lamp frequency may produce interference with horizontal synchronous frequency, and this may cause
[Note4] The voltage above this value should be applied to the lamp for more than 1 second to start-up. Otherwise
[Note5] Since lamp is consumables, the life time written above is referencial value and it is not guaranteed in this
[Note6] The performance of the backlight, for example life time or brightness, is much influenced by the
Lamp current range
Lamp power consumption
Lamp frequency
Kick-off voltage
Lamp life time
[Note7] It is required to have the inverter designed so that to allow the impedance deviation of the
[Note8] Under the environment of 10lx or less, miss-lighting or lighting delay may occur.
Module
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.
specification sheet by SHARP.
Above value is applicable when lamp (the long side of LCD module) is placed horizontally.
(Landscape position)
(Lamp lifetime may vary if lamp is in portrait position due to the change of mercury density inside the lamp.)
becomes lower. (Continuous operating for around 1 month under lower temp condition may reduce the
brightness to half of the original brightness.)
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. Recommended inverter is “ CXA-P1212B-WJL(TDK) ” .
Lamp life time is defined that it applied either
In case of operating under lower temp environment, the lamp exhaustion is accelerated and the brightness
In case of such usage under lower temp environment, periodical lamp exchange is recommended.
Parameter
(It is usually required to measure under the following condition.
two CCFT lamps and the capacity deviation of barast capacitor.
The backlight system is an edge-lighting type with 2 CCFT (Cold Cathode Fluorescent Tube).
The characteristics of single lamp are shown in the following table.
(Continuous turning on at Ta=25
Brightness becomes 50% of the original value under standard condition.
Kick-off voltage at Ta=-10
CN2,3： 1pin
CN2,3： 2pin
Symbol
PL
FL
Vs
L
L
IL
L
L
50000
30000
Min.
3.5
35
-
-
-
o
C exceeds maximum value,1450Vrms.
o
C, IL=6.0mArms)
Typ.
6.0
2.8
60
-
-
-
(2000)
Max.
1450
7.0
70
Inverter
output voltage
-
-
or
VL)
mArms
Vrms
hour
hour
kHz
Unit
W
under this condition
I
L
=6.0mA,Ta=25
at barast capacitor =12p
[Note1]
[Note2]
[Note3]
Inverter output
[Note5]
[Note5]
Transformer output
Transformer
output voltage
Inverter
I
I
L=
L=
6.0mA
7.0mA
Remark
2 , F
LD18203A-
L
=60kHz.
Ta=-10
[Note4]
o
C