Product Specification

7 / 31

LP141WX3

Liquid Crystal Display

Ver. 1.0

Apr. 23, 2008

Note)

6. The output of the inverter must have symmetrical(negative and positive) voltage waveform and

symmetrical current waveform.(Asymmetrical ratio is less than 10%) Please do not use the inverter

which has asymmetrical voltage and asymmetrical current and spike wave.

Lamp frequency may produce interface with horizontal synchronous frequency and as a result this may

cause beat on the display. Therefore lamp frequency shall be as away possible from the

horizontal synchronous frequency and from its harmonics in order to prevent interference.

7. It is defined the brightness of the lamp after being lighted for 5 minutes as 100%.

T

8. The lamp power consumption shown above does not include loss of external inverter.

The applied lamp current is a typical one.

9. Requirements for a system inverter design, which is intended to have a better display performance, a

better power efficiency and a more reliable lamp, are following.

It shall help increase the lamp lifetime and reduce leakage current.

a. The asymmetry rate of the inverter waveform should be less than 10%.

b. The distortion rate of the waveform should be within √2 ±10%.

* Inverter output waveform had better be more similar to ideal sine wave.

10. Inverter open voltage must be more than lamp voltage for more than 1 second for start-up.

Otherwise, the lamps may not be turned on.

※ Do not attach a conducting tape to lamp connecting wire.

If the lamp wire attach to a conducting tape, TFT-LCD Module has a low luminance and the inverter

has abnormal action. Because leakage current is occurred between lamp wire and conducting tape.

Ex of current wave)

* Asymmetry rate:

| I

* Distortion rate

I

Normal current wave - Standard

Abnormal current wave - Bad

Abnormal current wave - Bad

Abnormal current wave - Bad