Recently, China's Ministry of Information Industry issued the “Generic Specification for LED Pan el sâ€, an industry standard led by the China Electronics Standardization Institute. Here are a few simple points to introduce the specification:
First, use the following abbreviations and definitions
1, LED (light-emitting diode): English abbreviation for light emitting diode.
2, LED display screen: LED panel through a certain control mode, used to display text, text, graphics, images, animation, market and other information and TV, video signals and display screens composed of LED device array.
3. Display unit: The smallest unit of the LED display screen that is determined by the circuit and the installation structure and has a display function.
4. Fatal failure: Critical defects may cause harm or unsafe condition to the use, maintenance or related personnel, or the important characteristics of the unit product do not meet the requirements or the quality characteristics of the unit product are not in conformity with the regulations.
5, out of control point: out-of-control point The state of illumination does not match the display state of the control requirements and is a discrete distribution of LED basic light-emitting points.
6. Pseudo-color LED display screen: pseudo-color LEDpanel installs LED display screens composed of single-color LED devices of different colors in different areas of the LED display screen.
7, full-color LED display screen: all-color LED panel consists of red, green, blue three primary color LED devices and can be adjusted to a variety of color LED display screen.
Second, LED display screen classification
1. Use environment: The LED display screen is divided into indoor LED display screen and outdoor LED display screen according to the use environment.
2, display color: LED display screen is divided into single primary color LED display screen (including pseudo color LED display screen), dual primary color LED display screen and full color (three primary color) LED display screen. According to the gray level, it can be divided into 16, 32, 64, 128, 256 gray LED display screens.
3, display performance: LED display screen according to display performance is divided into text LED display screen, graphic LED display screen, computer video LED display screen, TV video LED display screen and market LED display screen. The market LED display screen generally includes an LED display screen for securities, interest rates, futures, and the like.
4. The basic light-emitting point is not the LED display screen. The indoor LED display screen can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm display screens according to the single-point diameter of the LED; the outdoor LED display screen is used. The pixel diameter can be divided into LED display screens such as Φ19mm, Φ22mm and Φmm26. In the market type LED display screen, the size of the digital tube 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. LED display screen such as cm (3 inch).
Third, the LED display screen hardware and software use environment
1, hardware use environment
The LED display screen hardware portion includes a general-purpose computer portion, a communication port, a dedicated data conversion portion, and a display portion, which are determined according to the type, area, and use site of the LED display screen. A detailed description should be given:
(1) Requirements for computer mainframes, various optional plug-in cards, external devices and communication interfaces;
(2) Requirements for the communication port and indicate the maximum communication distance;
(3) The communication mode between the data conversion part and the computer host;
(4) Power Supply requirements and structural installation requirements.
2, the software use environment for different performance LED display screen should be configured to meet the display function requirements of the display software, the software has the following functions:
(1) Comply with serialization and standardization requirements, and can be backward compatible;
(2) Adopt the operating system and language specified in the detailed specification;
(3) It is equipped with a complete self-test procedure and various levels of diagnostic procedures as needed;
(4) The special-purpose LED display screen is equipped with its corresponding dedicated software.
Fourth, appearance and materials
1. Appearance: The LED display screen has no obvious scratches on the outer frame. The outdoor LED display screen pixel tube installation should be consistent, no looseness and cracked casing.
2. Material: The LED display screen can be made of steel, aluminum or wood. The structure is required to be strong and beautiful.
5. Safety, power, temperature and humidity
1, security
The LED display screen is a Class I safety device specified in GB4943.
(1) LED display screen protection ground terminal.
(2) Safety mark: 1 Display screen protection The grounding terminal should be marked; 2LED display screen should have a warning sign at the fuse and Switching Power Supply.
(3) Earth leakage current: The earth leakage current of the LED display screen should not exceed 3.5mA (AC RMS value).
(4) Anti-electricity strength: The LED display screen can be insulated with a test voltage of 50HZ and 1500V (AC rms) for 1 min.
2, power supply
The power supply of the LED display screen is 220W±10%, 50HZ±5% or 80V±10%, and 50HXZ±5% should specify the maximum power consumption of each LED display screen unit display area or the total LED display screen in the detailed specification. Power consumption.
3, the temperature of the indoor screen temperature: 1 working environment low temperature: 0 ° C; high temperature: +40 ° C. 2 Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
Ambient temperature of outdoor screen: 1 working environment low temperature: optional -20 ° C, -10 ° C; high temperature: +50 ° C. 2 Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
4. When the humidity is at the highest working temperature, the LED display screen should work normally under the condition of relative humidity of 90%.
Sixth, LED display screen performance characteristics
1. Performance: The text LED display screen and graphic LED display screen should have the moving in and out mode and display mode specified in the detailed specification. The computer video LED display screen should have: an animation function. It is required that the LED display screen animation display is consistent with the area corresponding to the computer display; the text display function. Requires text to display stable, clear crosstalk; grayscale function. It is required to have the grade gray scale specified in the detailed specification. In addition to animation, text display, and grayscale functions, the TV video LED display screen should be able to display TV and video images. The market LED display screen has its corresponding market display capability.
2. Uniformity: The requirements for the uniformity of the LED display screen should be specified in the detailed specification.
3. Out of control points: The out-of-control point of the indoor LED display screen is not more than three ten thousandths, and the out-of-control point of the outdoor LED display screen should be no more than three thousandths; and it is discretely distributed.
First, use the following abbreviations and definitions
1, LED (light-emitting diode): English abbreviation for light emitting diode.
2, LED display screen: LED panel through a certain control mode, used to display text, text, graphics, images, animation, market and other information and TV, video signals and display screens composed of LED device array.
3. Display unit: The smallest unit of the LED display screen that is determined by the circuit and the installation structure and has a display function.
4. Fatal failure: Critical defects may cause harm or unsafe condition to the use, maintenance or related personnel, or the important characteristics of the unit product do not meet the requirements or the quality characteristics of the unit product are not in conformity with the regulations.
5, out of control point: out-of-control point The state of illumination does not match the display state of the control requirements and is a discrete distribution of LED basic light-emitting points.
6. Pseudo-color LED display screen: pseudo-color LEDpanel installs LED display screens composed of single-color LED devices of different colors in different areas of the LED display screen.
7, full-color LED display screen: all-color LED panel consists of red, green, blue three primary color LED devices and can be adjusted to a variety of color LED display screen.
Second, LED display screen classification
1. Use environment: The LED display screen is divided into indoor LED display screen and outdoor LED display screen according to the use environment.
2, display color: LED display screen is divided into single primary color LED display screen (including pseudo color LED display screen), dual primary color LED display screen and full color (three primary color) LED display screen. According to the gray level, it can be divided into 16, 32, 64, 128, 256 gray LED display screens.
3, display performance: LED display screen according to display performance is divided into text LED display screen, graphic LED display screen, computer video LED display screen, TV video LED display screen and market LED display screen. The market LED display screen generally includes an LED display screen for securities, interest rates, futures, and the like.
4. The basic light-emitting point is not the LED display screen. The indoor LED display screen can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm display screens according to the single-point diameter of the LED; the outdoor LED display screen is used. The pixel diameter can be divided into LED display screens such as Φ19mm, Φ22mm and Φmm26. In the market type LED display screen, the size of the digital tube 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. LED display screen such as cm (3 inch).
Third, the LED display screen hardware and software use environment
1, hardware use environment
The LED display screen hardware portion includes a general-purpose computer portion, a communication port, a dedicated data conversion portion, and a display portion, which are determined according to the type, area, and use site of the LED display screen. A detailed description should be given:
(1) Requirements for computer mainframes, various optional plug-in cards, external devices and communication interfaces;
(2) Requirements for the communication port and indicate the maximum communication distance;
(3) The communication mode between the data conversion part and the computer host;
(4) Power Supply requirements and structural installation requirements.
2, the software use environment for different performance LED display screen should be configured to meet the display function requirements of the display software, the software has the following functions:
(1) Comply with serialization and standardization requirements, and can be backward compatible;
(2) Adopt the operating system and language specified in the detailed specification;
(3) It is equipped with a complete self-test procedure and various levels of diagnostic procedures as needed;
(4) The special-purpose LED display screen is equipped with its corresponding dedicated software.
Fourth, appearance and materials
1. Appearance: The LED display screen has no obvious scratches on the outer frame. The outdoor LED display screen pixel tube installation should be consistent, no looseness and cracked casing.
2. Material: The LED display screen can be made of steel, aluminum or wood. The structure is required to be strong and beautiful.
5. Safety, power, temperature and humidity
1, security
The LED display screen is a Class I safety device specified in GB4943.
(1) LED display screen protection ground terminal.
(2) Safety mark: 1 Display screen protection The grounding terminal should be marked; 2LED display screen should have a warning sign at the fuse and Switching Power Supply.
(3) Earth leakage current: The earth leakage current of the LED display screen should not exceed 3.5mA (AC RMS value).
(4) Anti-electricity strength: The LED display screen can be insulated with a test voltage of 50HZ and 1500V (AC rms) for 1 min.
2, power supply
The power supply of the LED display screen is 220W±10%, 50HZ±5% or 80V±10%, and 50HXZ±5% should specify the maximum power consumption of each LED display screen unit display area or the total LED display screen in the detailed specification. Power consumption.
3, the temperature of the indoor screen temperature: 1 working environment low temperature: 0 ° C; high temperature: +40 ° C. 2 Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
Ambient temperature of outdoor screen: 1 working environment low temperature: optional -20 ° C, -10 ° C; high temperature: +50 ° C. 2 Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
4. When the humidity is at the highest working temperature, the LED display screen should work normally under the condition of relative humidity of 90%.
Sixth, LED display screen performance characteristics
1. Performance: The text LED display screen and graphic LED display screen should have the moving in and out mode and display mode specified in the detailed specification. The computer video LED display screen should have: an animation function. It is required that the LED display screen animation display is consistent with the area corresponding to the computer display; the text display function. Requires text to display stable, clear crosstalk; grayscale function. It is required to have the grade gray scale specified in the detailed specification. In addition to animation, text display, and grayscale functions, the TV video LED display screen should be able to display TV and video images. The market LED display screen has its corresponding market display capability.
2. Uniformity: The requirements for the uniformity of the LED display screen should be specified in the detailed specification.
3. Out of control points: The out-of-control point of the indoor LED display screen is not more than three ten thousandths, and the out-of-control point of the outdoor LED display screen should be no more than three thousandths; and it is discretely distributed.
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