LM230WF5
Liquid Crystal Display
Product Specification
Table 3. LED bar Electrical characteristics
Values
Parameter
Symbol
Unit
Notes
Min.
Typ.
120
47.3
11.3
-
Max.
125
50.3
12.1
-
LED String Current
LED String Voltage
Power Consumption
LED Life Time
Is
Vs
-
44.3
-
mA
V
1, 2, 5
1, 5
PBar
LED_LT
Watt
Hrs
1, 2, 4
3
30,000
Notes) The LED Bar consists of 30 LED packages, 2 strings (parallel) x 15 packages (serial)
LED driver design guide
: The design of the LED driver must have specifications for the LED in LCD Assembly.
The performance of the LED in LCM, for example life time or brightness, is extremely influenced by
the characteristics of the LED driver.
So all the parameters of an LED driver should be carefully designed and output current should be
Constant current control.
Please control feedback current of each string individually to compensate the current variation
among the strings of LEDs.
When you design or order the LED driver, please make sure unwanted lighting caused by
the mismatch of the LED and the LED driver (no lighting, flicker, etc) never occurs.
When you confirm it, the LCD module should be operated in the same condition as installed in
your instrument.
1. The specified values are for a single LED bar.
2. The specified current is defined as the input current for a single LED string with 100% duty cycle.
3. The LED life time is defined as the time when brightness of LED packages become 50% or less
than the initial value under the conditions at Ta = 25 2°C and LED string current is typical value.
4. The power consumption shown above does not include loss of external driver.
The typical power consumption is calculated as PBar = Vs(Typ.) x Is(Typ.) x No. of strings.
The maximum power consumption is calculated as PBar = Vs(Max.) x Is(Typ.) x No. of strings.
5. LED operating conditions are must not exceed Max. ratings.
Ver. 0.0
Feb. 16, 2012
7 / 30
LG [ LG SEMICON CO.,LTD. ]
