About "General Specification of LED Display" Introduction

The “Generic specification for LED panels” issued by the Ministry of Information Industry under the jurisdiction of the China Electronics Standardization Institute is a concern for LED display production and installation companies. Knowledge, for producers and users of such products.

First, use the following abbreviations and definitions LED display

1. LED light-emitting diode: ligth-emitting diode LED light-emitting diode

2, LED display: LED panel through a certain control method, used to display text, text, graphics, images, animation, quotes and other information as well as television, video signals and LED display array composed of an array of devices.

3. Display unit: display unit The smallest unit of the LED display screen determined by the circuit and mounting structure and having the display function.

4. Fatality defect: critical defect The use, maintenance of the product or persons associated with it may cause a hazard or unsafe condition, or the important characteristics of the unit product do not meet the requirements or the quality characteristics of the unit product do not meet the requirements.

5, out of control points: out-of-control point light-emitting state and control requirements of the display state does not match and discrete distribution of the basic LED light-emitting point.

6. Pseudo-color LED display: The pseudo-color LED panel is installed in different areas of the LED display and is composed of LED displays of different color single-color LED devices.

7, full-color LED display: all-color LED panel consists of red, green, blue three-color LED devices and can be multi-color LED display.

Second, LED display classification

1, the use of the environment: LED display is divided into indoor LED display and outdoor LED display.

2, display color: LED display is divided into single-color LED display (including pseudo-color LED display), dual-color LED display and full-color (three-color) LED display. According to the gray level can be divided into 16,32,64,128,256 gray LED display and so on.

3, display performance: LED display display performance is divided into text LED display, graphic LED display, computer video LED display, TV video LED display and LED display and so on. Quotes LED displays generally include LED displays for securities, interest rates, futures, and other purposes.

4, the basic point of non-market type LED display, indoor LED display using LED single point diameter can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm and other displays; LED display used by the outdoor The pixel diameter can be divided into Φ19mm, Φ22mm and Φmm26 LED display screens. The size of the digital tube used in market-type LED display can be divided into 2.0cm (0.8inch), 2.5cm (1.0inch), 3.0cm (1.2inch), 4.6CMM (1.8inch), 5.8cm (2.3inch), 7.6 Cm (3inch) LED display.

Third, LED display hardware and software use environment

1, hardware use environment

The LED display hardware includes a general computer part, a communication line, a dedicated data conversion part, and a display part determined according to the type, area, and use site of the LED display. Give detailed instructions:

(1) Requirements for computer hosts, various optional cards, external devices, and communication interfaces;

(2) Requirements for communication lines and indicate the maximum communication distance;

(3) The communication method of the data conversion part and the computer host;

(4) Power supply requirements and structural installation requirements.

2. Software use environment

For different performance LED display screens, display software that meets the display function requirements should be configured. The software has the following functions:

(1) Meets serialization and standardization requirements and can be backward compatible;

(2) Adopt operating systems and languages ​​specified in the detailed specification;

(3) Complete self-checking procedures and various levels of diagnostic procedures as required;

(4) The special purpose LED display is equipped with its own dedicated software.

Fourth, appearance and materials

1, Appearance: LED display frame without obvious scratches. Outdoor LED display pixel tube installation should be consistent, no loose

Movement and shell broken.

2, material: LED display part can be steel, aluminum, wood and other materials. Requires a sturdy and beautiful structure.

V. Safety, Power, Temperature and Humidity

1, security

The LED display is a Class I safety device as specified in GB4943.

(1) LED display protection grounding terminal.

(2) Security mark

1 Display Protection Ground terminal should be marked.

2 LED display should have a warning sign at the fuse and switching power supply.

(3) Ground leakage current: The leakage current to the ground of the LED display should not exceed 3.5mA (AC rms).

(4) Anti-electric strength: The LED display panel can be used for test voltage of 50Hz, 1500V (AC rms) for 1 min. No insulation breakdown should occur.

2, power supply: LED display power supply is 220W ± 10%, 50Hz ± 5% or 80V ± 10%, 50HXZ ± 5% should be specified in the detailed specification of the various types of LED display unit display area of ​​the maximum power consumption Or LED display total power consumption.

3, temperature:

The ambient temperature of the indoor screen is: working temperature low temperature: 0°C; high temperature: +40°C. storage environment low temperature: -40°C; high temperature: +60°C.

The outdoor screen's ambient temperature is: working environment temperature: optional -20 °C, -10 °C; high temperature: +50 °C. Storage environment, low temperature: -40 °C; high temperature: +60 °C.

4. Humidity: At the highest working temperature, the LED display should be able to work normally with a relative humidity of 90%.

Six, LED display performance characteristics

1. Performance: The text LED display and graphic LED display should have the move-in and move-out mode and display mode specified in the detailed specification. Computer video LED display should have: animation function. It is required that the LED display animation display be consistent with the corresponding display area of ​​the computer display; the text display function. Requirements text display stable, clear crosstalk; grayscale function. It is required to have a gradation level specified in the detailed specification. In addition to the animation, text display, and grayscale functions, the TV video LED display should be able to display television and video footage. Quotes LED display with its corresponding market display capabilities.

2. Uniformity: The requirements for the uniformity of the LED display should be specified in the detailed specification.

3, out of control points: indoor LED display out of control point is not greater than three-thousandths, the outdoor LED display out of control points should be less than three thousandths of a thousand; and discrete distribution.