LQ121S1LG41 Sharp Electronics, LQ121S1LG41 Datasheet - Page 10

• Manufacturer Part Number: LQ121S1LG41
• Manufacturer: Sharp Electronics

Specifications of LQ121S1LG41

• Size: 12.1in
• Resolution Term: SVGA-Strong 1
• Resolution: 800 x 600Pixels
• Nits: 370
• Contrast Ratio: 300
• Viewing Angle (up/down),(right/left): 60/50 , 70/70deg
• Operating Temperature: -10 to +65deg C
• Backlight: 1 x CCFT
• Panel Mode: Transmissive
• Interface: LVDS
• Lead Free Status / Rohs Status: Compliant

7-2. Backlight driving
[Note2] At the condition of IL=6.0mArms
[Note3] Lamp frequency may produce interference with horizontal synchronous frequency, and
[Note4] The voltage above this value should be applied to the lamp for more than 1 second to start-
[Note5] Since lamp is consumables, the life time written above is referencial value and it is not
[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
Lamp current range
Lamp power consumption
Lamp frequency
Kick-off voltage
Lamp life time
[Note1] Lamp current is measured with current meter for high frequency as shown below.
In case of operating under lower temp environment, the lamp exhaustion is accelerated and the
brightness becomes lower. (Continuous operating under 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.
Recommended inverter is “CXA-P1212B-WJL(TDK corporation) ” .
of the two CCFT lamps and the capacity deviation of barast capacitor.
The backlight system is an edge-lighting type with single CCFT (Cold Cathode Fluorescent Tube).
The characteristics of single lamp are shown in the following table.
Parameter
guaranteed in this specification sheet by SHARP.
Lamp life time is defined that it applied either
this may cause 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.
up. Otherwise the lamp may not be turned on.
(Continuous turning on at Ta=25
Brightness becomes 50% of the original value under standard condition.
Kick-off voltage at Ta=-10
Symbol
PL
FL
Vs
LL
IL
50000
Min.
3.0
o
40
-
-
-
-
C exceeds maximum value,1500Vrms.
o
C, IL=6.0mArms)
Typ.
6.0
3.5
60
-
-
-
-
or
Max.
1200
1400
1500
6.5
80
-
-
under this condition
mArms
Vrms
hour
kHz
Unit
W
[Note1]
[Note2]
[Note3]
Ta=25
Ta=0
Ta=-10
[Note5]
o
C
o
Remark
o
C
C
LD15606C-
[Note4]