M220Z1-L10 查看數據表（PDF） - Unspecified

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M220Z1-L10

TFT LCD Approval Specification

Unspecified 

Issued Date: Jan. 06, 2009

Model No.: M220Z1-L10

Approval

inverter please make sure that a poor lighting caused by the mismatch of the Backlight and the

inverter (miss-lighting, flicker, etc.) never occurs. If the above situation is confirmed, the module

should be operated in the same manners when it is installed in your instrument.

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

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

which has unsymmetrical voltage and unsymmetrical 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.

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

better power efficiency and a more reliable lamp. It shall help increase the lamp lifetime and reduce its

leakage current.

a. The asymmetry rate of the inverter waveform should be 10% below;

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

c. The ideal sine wave form shall be symmetric in positive and negative polarities.

* Asymmetry rate:

Ip

| I p – I –p | / Irms * 100%

I -p

* Distortion rate

I p (or I –p) / Irms

10 / 26

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