參數(shù)資料
型號(hào)： LQ104V1DG51
廠商： Sharp Corporation
英文描述： TFT LCD MODULE
中文描述： TFT液晶顯示模塊
文件頁(yè)數(shù)： 8/21頁(yè)
文件大?。?/td> 593K
代理商： LQ104V1DG51
LD13708-6
6-2. Backlight driving
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.
Ta=25
℃
Parameter
Symbol
Min.
Lamp current
I
L
3.5
Lamp power consumption
P
L
－
Lamp frequency
F
L
40
Kick-off voltage
Vs
－
－
L
L
50000
Lamp life time
L
L
30000
【
Note1
】
Lamp current is measured with current meter for high frequency as shown below.
Typ.
6.0
2.8
60
－
－
－
－
Max.
7.0
－
70
1000
1300
－
－
Unit
mArms
【
Note1
】
Ｗ
【
Note2
】
KHz
【
Note3
】
Vrms Ta=25
℃
Vrms Ta =0
℃【
Note4
】
hour
【
Note5
】
I
L
=6.0mA
hour
【
Note5
】
I
L=
7.0mA
Remark
【
Note2
】
At the condition of Y
L
=350cd/m2
【
Note3
】
Lamp frequency may produce interference with horizontal synchronous frequency,and
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.
【
Note4
】
The open output voltage of the inverter shall be maintained for more than 1sec; otherwise
the lamp may not be turned on.
【
Note5
】
Since lamp is consumables, the life time written above is referencial value 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
(Continuous turning on at Ta=25
℃
, IL=6/7mArms)
①
Brightness becomes 50% of the original value under standard condition.
②
Kick-off voltage at Ta=0
℃
exceeds maximum value,(TBD) Vrms.
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.
【
Note6
】
The performance of the backlight, for example life time or brightness, is much influenced
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.
【
Note7
】
It is required to have the inverter designed so that to allow the impedance deviation
of the two CCFT lamps and the capacity deviation of barast capacitor.
Module
Inverter
Ａ
～
* 3pin is V
LOW
１
3
3
１
Ａ
～
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