Product Specification

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LM185WH2

Liquid Crystal Display

Ver. 1.0

JUN., 21, 2010

Table 3. LED Bar ELECTRICAL CHARACTERISTICS

4,6

Watt

10.08

9.22

-

PBar

Power Consumption

5

Hrs

-

-

30,000

LED_LT

LED Life Time

3

V

56

51.2

-

Vs

LED String Voltage

1

LED :

2

mA

65

60

-

Is

LED String Current

Note

s

Max.

Typ.

Min.

Unit

Values

Condition

Symbol

Parameter

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. Specified values are for a single LED bar.

2. The specified current is input LED chip 100% duty current.

3. The specified voltage is input LED string and Bar voltage at typical 60mA 100% duty current.

4. The specified power consumption is input LED bar power consumption at typical 60 mA 100%

duty current.

5. The life is determined as the time at which luminance of the LED is 50% compared to that of

initial value at the typical LED current on condition of continuous operating at 25

± 2°C.

6. The LED bar power consumption shown above does not include loss of external driver.

The used LED bar current is the LED typical current.

Min Power Consumption is calculated with PBar = Vs(Min.) x Is(Typ.) x Nstring

Max Power Consumption is calculated with PBar = Vbar(Max.) x Is(Typ) x Nstring

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