LED display standard test method

In May 1998, the LED display branch of the founding conference held in Beijing, we put forward the necessary led panel major photoelectric performance test method standardization. After the meeting, the committee proposed according to everybody, entrust nanjing the roper Co., LTD. Is responsible for drafting the LED display detection method ", and has organized the kunming, haikou, nanjing three sessions to discuss, solicit opinions, the additional changes, in September 2000 in xiamen, the second plenary session, "method" to all member unit issued by the trial began, in order to promote the development of industry standards. In the trial process technology group was established, and accept the Beijing Olympic committee at the time of the unit such as entrusted, successively in Beijing ShouTi, workers stadium, the Olympic sports center and huangshan gymnasium and of a full color, with reference to the method of detection. In April, 2001, to be held in hangzhou detection technology, discussed the international conference on methods of trial; And the xian, Beijing blue the ching unit such as the "methods" on the implementation of the speech. In September, in the Beijing international big screen display equipment exhibition, technology group to the exhibition of more than on the screen, and the actual China metrology institute of the testing instrument calibration of all kinds of instruments made comparison. After two meetings in Beijing the "methods of the discusses modification; In 2002 at the end of the ministry of information industry report. The original plan of this year on June 5, held all the members of the congress, "method", stable cross but not because of, in addition to the "SARS" print loses the convention, and insects cancelled many member unit and urgent hope to see "method", to satisfy our members the requirement of the unit, the first "method" discussion in the amended version published in for your reference.

1 scope

This standard to led scren, optical, electrical, mechanical, the main technical performance, the strict rules and grading test method.

This standard applies to all kinds of the led panel (hereinafter referred to as "screen).

2 normative references files

The following documents, the terms of reference of the standard by the terms of this standard. A Every note of documents, the reference date then all change single (not including the content) or revision errata is applicable to this standard. However, according to an agreement to encourage this part of all parties to study whether can use these documents to the latest version. Anyone who doesn't note date reference documents, the latest version applicable to this section.

GB4208-1993 electrical and electronic products shell protection standards

SJ/T11141-XXXX led panel general specification

3 grade

By testing results, will index is divided into three levels.

Class A: screen should achieve the basic indicators.

Class B: index is higher than A level.

Class C: index is higher than A level and grade B.

4 test environment and test instrument

4.1 test environment

In addition to the special provisions, test environment is as follows:

Environment: 15 â„?temperature to 35 â„?

Relative humidity: 40% ~ 80%;

Atmospheric pressure: 86 kpa ~ 106 kpa;

The power supply voltage: 220 V + 10%, 50 Hz ac + lHz.

4.2 test instrument and software

Color TV signal generator: S/N more than 52 dB;

Color analyzer: precision than plus or minus 5% (used to measure the brightness,

The same kind of optical properties such as chroma instrument can also be);

Vernier caliper: identify degrees 0.02 mm;

2 °; precision enterprise Beijing zhongtian ruihua scientific trade Co. :

The thermometer: accuracy + 1 â„?

Light intensity meter: precision than-10%;

Illuminance meter: precision than-10%;

Oscilloscope: 100 MHz;

Ruler: length is more than 1 m;

More than 1/100 mm plug: precision;

Brightness identify test software;

Gray test software;

Frame frequency test software.

5 test method

5.1 electric performance

5.1. L change frame frequency

A) definition

Picture information the frequency of updates FHO

B) requirements

C) measurement

-start frame frequency test software, and on the screen open four areas: A1, A2, the A3 and A4. The first frame in the area A1 showed in a "had", the second frame in the area within the A2 display a "s", the third frame in the area within the A3 display a "," 4 frame in regional A4 showed in a "painted". The four pictures of a group, and from fifth frame according to this law cyclic display;