The "Generic specification for LED pan el s" issued by the Ministry of Information Industry of the People's Republic of China, which is under the jurisdiction of the China Electronics Standardization Institute, is of great interest to LED display production and installation companies. Content and knowledge for the reference of producers and users of such products.
First, use the following abbreviations and define LED display
1, LED light-emitting diode: ligth emitting diode
2, LED display: 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 screen composed of LED device array.
3. Display unit: The smallest unit of the LED display 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: pseudo-color LEDpanel in different areas of the LED display to install LED display of different color single-color LED devices.
7, full-color LED display: 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.
Second, LED display classification
1. Use environment: LED display screen is divided into indoor LED display and outdoor LED display according to the use environment.
2, display color: LED display according to the display color is divided into single primary color LED display (including pseudo color LED display), dual primary color LED display and full color (three primary color) LED display. According to the gray level, it can be divided into 16, 32, 64, 128, 256 gray LED display.
3, display performance: LED display according to display performance is divided into text LED display, graphic LED display, computer video LED display, TV video LED display and market LED display. The market LED display generally includes LED displays for securities, interest rates, futures, and the like.
4, the basic light point non-line type LED display, indoor LED display according to the LED single point diameter can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm display; outdoor LED display according to the use The pixel diameter can be divided into LED displays such as Φ19mm, Φ22mm and Φmm26. In the market type LED display, 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 such as cm (3 inch).
Third, the hardware and software environment of the LED display
1, hardware use environment
The LED display hardware part includes a general-purpose 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. 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 line 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
LED display screens with different performances should be equipped with display software that meets their display function requirements. 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 is equipped with its corresponding dedicated software.
Fourth, appearance and materials
1. Appearance: There is no obvious scratch on the LED display frame. The outdoor LED display pixel tube should be installed consistently, without looseness and broken shell.
2, materials: LED display parts can be steel, aluminum, wood and other materials. The structure is required to be strong and beautiful.
5. Safety, power, temperature and humidity
1, security
The LED display is a Class I safety device specified in GB4943.
(1) LED display protection ground terminal.
(2) Security mark
1 Display protection ground terminal should be marked.
The 2 LED display should have a warning sign at the fuse and switching power supply.
(3) Earth leakage current: The earth leakage current of the LED display should not exceed 3.5mA (AC RMS).
(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: LED display power supply is 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should be specified in the detailed specifications of the various LED display unit display area of ​​the maximum power consumption Or the total power consumption of the LED display.
3. Temperature:
The ambient temperature of the indoor screen is: working environment low temperature: 0 ° C; high temperature: + 40 ° C. Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
The ambient temperature of the outdoor screen is: low temperature in working environment: 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 work normally at a relative humidity of 90%.
Sixth, LED display performance characteristics
1. Performance: The text LED display and graphic LED display should have the moving in and out mode and display mode specified in the detailed specification. The computer video LED display should have: an animation function. It is required that the LED display 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, TV video LED displays should be able to display TV and video images. The market LED display has the corresponding market display capability.
2. Uniformity: The requirements for the uniformity of the LED display should be specified in the detailed specification.
3. Out of control points: The out-of-control point of the indoor LED display is not more than three ten thousandth, and the out-of-control point of the outdoor LED display should be no more than three thousandths; and it is discretely distributed.
First, use the following abbreviations and define LED display
1, LED light-emitting diode: ligth emitting diode
2, LED display: 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 screen composed of LED device array.
3. Display unit: The smallest unit of the LED display 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: pseudo-color LEDpanel in different areas of the LED display to install LED display of different color single-color LED devices.
7, full-color LED display: 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.
Second, LED display classification
1. Use environment: LED display screen is divided into indoor LED display and outdoor LED display according to the use environment.
2, display color: LED display according to the display color is divided into single primary color LED display (including pseudo color LED display), dual primary color LED display and full color (three primary color) LED display. According to the gray level, it can be divided into 16, 32, 64, 128, 256 gray LED display.
3, display performance: LED display according to display performance is divided into text LED display, graphic LED display, computer video LED display, TV video LED display and market LED display. The market LED display generally includes LED displays for securities, interest rates, futures, and the like.
4, the basic light point non-line type LED display, indoor LED display according to the LED single point diameter can be divided into Φ3mm, Φ3.75mm, Φ5mm, Φ8mm, and Φ10mm display; outdoor LED display according to the use The pixel diameter can be divided into LED displays such as Φ19mm, Φ22mm and Φmm26. In the market type LED display, 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 such as cm (3 inch).
Third, the hardware and software environment of the LED display
1, hardware use environment
The LED display hardware part includes a general-purpose 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. 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 line 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
LED display screens with different performances should be equipped with display software that meets their display function requirements. 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 is equipped with its corresponding dedicated software.
Fourth, appearance and materials
1. Appearance: There is no obvious scratch on the LED display frame. The outdoor LED display pixel tube should be installed consistently, without looseness and broken shell.
2, materials: LED display parts can be steel, aluminum, wood and other materials. The structure is required to be strong and beautiful.
5. Safety, power, temperature and humidity
1, security
The LED display is a Class I safety device specified in GB4943.
(1) LED display protection ground terminal.
(2) Security mark
1 Display protection ground terminal should be marked.
The 2 LED display should have a warning sign at the fuse and switching power supply.
(3) Earth leakage current: The earth leakage current of the LED display should not exceed 3.5mA (AC RMS).
(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: LED display power supply is 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should be specified in the detailed specifications of the various LED display unit display area of ​​the maximum power consumption Or the total power consumption of the LED display.
3. Temperature:
The ambient temperature of the indoor screen is: working environment low temperature: 0 ° C; high temperature: + 40 ° C. Storage environment low temperature: -40 ° C; high temperature: +60 ° C.
The ambient temperature of the outdoor screen is: low temperature in working environment: 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 work normally at a relative humidity of 90%.
Sixth, LED display performance characteristics
1. Performance: The text LED display and graphic LED display should have the moving in and out mode and display mode specified in the detailed specification. The computer video LED display should have: an animation function. It is required that the LED display 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, TV video LED displays should be able to display TV and video images. The market LED display has the corresponding market display capability.
2. Uniformity: The requirements for the uniformity of the LED display should be specified in the detailed specification.
3. Out of control points: The out-of-control point of the indoor LED display is not more than three ten thousandth, and the out-of-control point of the outdoor LED display should be no more than three thousandths; and it is discretely distributed.
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