LQ121S1DG31 Sharp Electronics, LQ121S1DG31 Datasheet - Page 8

• Manufacturer Part Number: LQ121S1DG31
• Manufacturer: Sharp Electronics

Specifications of LQ121S1DG31

• Lead Free Status / Rohs Status: Not Compliant

6-2. Backlight driving
【Note2】At the condition of Y
【Note3】Lamp frequency may produce interference with horizontal synchronous frequency,and
【Note4】The open output voltage of the inverter shall be maintained for more than 1s; otherwise
【Note5】a)Since lamp is consumables, the life time written above is referential value and it is not
【Note6】The performance of the backlight, for example life time or brightness, is much influenced
Lamp current
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.
The characteristics of single lamp are shown in the following table.
The backlight system is an edge-lighting type with double CCFT (Cold Cathode Fluorescent Tube).
b)In case of operating under lower temp environment, the lamp exhaustion is accelerated
Parameter
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
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.
the lamp may not be turned on.
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.
guaranteed in this specification sheet by SHARP.
Lamp life time is defined that it applied either ① or ② under this condition
① Brightness becomes 50% of the original value under standard condition.
② Kick-off voltage at Ta=0℃ exceeds maximum value,(1400V) rms.
and the brightness becomes lower.
(Continuous operating for around 1 month under lower temp condition may reduce the
In case of such usage under lower temp environment, periodical lamp exchange is recommended.
Module
(Continuous turning on at Ta=25℃, I
brightness to half of the original brightness.)
１
３
Symbol
L
=300cd/m
Vs
L
P
F
I
L
* 3pin is V
L
L
L
Ａ
～
Min.
2
2.0
－
35
－
－
－
LOW
L
=6mA rms)
50000
Typ.
6.0
3.3
60
－
－
Inverter
Max.
1200
1400
6.0
－
80
－
mA rms 【Note1】
V rms
V rms Ta=0℃【Note4】
Hour 【Note5】
KHz 【Note3】
Unit
W
【Note2】
Ta=25℃【Note4】
Ta=25℃
Remark
LD-12204-6