LED electronic display general specification
1 Scope
This standard specifies the definition, classification, technical requirements, inspection methods, inspection rules and packaging and transportation requirements for LED display. This standard applies to LED display products. It is the main technical basis for the design, manufacture, installation, use, quality inspection and formulation of various technical standards and technical documents for LED display products.
2 Reference standard
The provisions contained in the following standards constitute provisions of this standard by reference in this standard. The versions shown are valid at the time of publication. All standards will be revised and parties using this standard should explore the possibility of using the latest version of the following standards.
GB191-90 packaging storage and transportation icon
GB2423.1-89 Basic environmental test procedures for electric and electronic products Test A: Low temperature test method
GB2423.2-89 Basic environmental test procedures for electric and electronic products Test B: High temperature test method
GB2423.3-89 Basic Environmental Test Procedures for Electrical and Electronic Products Test Ca Constant Damp Heat Test Method
GB4943-95 Security of information technology equipment (including electrical affairs equipment)
GB6388-86 transport packaging receipt and delivery mark
GB6587.4-86 Vibration measurement of electronic measuring instruments
GB6587.6-86 Electronic measuring instrument transportation test
GB6593-86 Electronic measuring instrument quality inspection rules
General technical conditions for GB9813-88 miniature digital electronic computer
GB11463-89 Reliability Test of Electronic Measuring Instruments
SJ/T10463-93 Electronic measuring instrument packaging, marking, storage requirements
3 definition
This standard uses the following abbreviations and definitions:
3.1 LED light emitting diode ligth emitting diode
3.2 LED display LED panel Through a certain control mode, it is used to display various information such as text, text, graphics, images, animation, market and so on, as well as TV, video signal and display screen composed of LED device array.
3.3 display unit The smallest unit of the LED display that is determined by the circuit and the mounting structure and has a display function.
3.4 Critical defect A defect that may result in a hazard or unsafe condition in the use, maintenance, or related personnel, or an important characteristic of the unit product that does not meet the requirements or the quality characteristics of the unit product is seriously inconsistent with the regulations.
3.5 Out-of-control point The illuminating state does not match the display state of the control request and is a discrete LED basic illuminating point.
3.6 Pseudo-color LED display The pseudo-color LED panel is equipped with LED displays of different primary color LED devices in different areas of the LED display.
3.7 Full-color LED display all-color LED panel consists of three primary color LED devices of red, green and blue and can display a variety of color LED display.
4 classification
LED displays can be classified according to the following conditions:
4.1 Use environment LED display is divided into indoor LED display and outdoor LED display according to the use environment.
4.2 Display Color LED display 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.
4.3 Display performance The LED display is divided into text LED display, graphic LED display, computer video LED display, TV video LED display and market LED display according to display performance. The market LED display generally includes LED displays for securities, interest rates, futures, and the like.
4.4 Basic light-emitting point non-line type LED display, indoor LED display can be divided into Φ3mm, Φ375mm, Φ5mm, Φ8mm, and Φ10mm display according to the single-point diameter of the LED; the outdoor LED display adopts the pixel diameter Can be divided into Φ19mm, Φ22mm and Φmm26 LED display.
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).
5 requirements
5.1 LED display hardware usage 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. In the detailed specification it should be stated:
a. Requirements for computer mainframes, various optional plug-in cards, external devices, and communication interfaces;
b. Requirements for the communication line and indicate the maximum communication distance;
c. The communication mode of the data conversion part and the host computer;
d. Power supply requirements and structural installation requirements.
5.2 Software use environment of LED display The LED display of different performance should be equipped with display software that can meet the requirements of its display function. The software has the following functions:
a. Comply with serialization and standardization requirements, and be backward compatible;
b. Adopt the operating system and language specified in the detailed specification;
c. Equipped with a comprehensive self-test procedure and various levels of diagnostic procedures as needed;
d. Equipped with special software for special purpose LED displays.
5.3 Structure and appearance
5.3.1 Structural LED display parts can be made of steel, aluminum, wood and other materials. The structure is required to be strong and beautiful.
5.3.2 Appearance The LED display frame has no obvious scratches. The outdoor LED display pixel tube should be installed consistently, without looseness and broken shell.
5.4 Safety Requirements The LED display is a Class I safety device specified in GB4943.
5.4.1 LED display protection ground terminal.
5.4.2 Security Mark
5.4.2.1 LED display protection The ground terminal shall be marked.
5.4.2.2 The LED display shall have a warning sign at the fuse and switching power supply.
5.4.3 Earth leakage current The earth leakage current of the LED display shall not exceed 3.5mA (AC RMS).
5.4.4 Anti-electricity LED display screen can be insulated from 100KZ, 1500V (AC RMS) test voltage for 1min.
5.4.5 The temperature rise of the metal part after the temperature rise of the temperature rise LED display is not more than 45K, and the temperature rise of the insulation material does not exceed 70K.
5.5 LED display performance characteristics Text LED display and graphic LED display should have the move in and out mode and display mode specified in the detailed specification.
The computer video LED display should have:
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.
5.6 Uniformity The requirements for uniformity of the LED display shall be specified in the detailed specification.
5.7 The out-of-control point of the indoor LED display in the out-of-control point is not more than three-thousandths of a percent, and the out-of-control point of the outdoor LED display should not be less than three-thousandths;
5.8 Power supply LED display power supply is 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should specify the maximum power consumption or LED of the display area of ​​various LED display units in the detailed specification Total display power consumption.
5.9 Environmental adaptability
5.9.2.1 Temperature The ambient temperature of the indoor screen is: working environment low temperature: 00C; high temperature: +400C. Storage environment low temperature: -400C; high temperature: +600C.
The ambient temperature of the outdoor screen is: low temperature in working environment: optional -200C, -100C; high temperature: +500C. Storage environment low temperature: -400C; high temperature: +600C.
5.9.2.2 Damp heat At the highest operating temperature, the LED display should be able to operate normally with a relative humidity of 90%.
5.9.3 Vibration LED display screens are subject to vibrations during transportation, loading and unloading, and transportation of automobiles, trains, and airplanes. The car screen should be able to work properly during the operation of the installed vehicle.
5.9.4 Transport LED displays can be transported using ordinary means of transport such as cars, trains, and airplanes.
5.10 Reliability requirements The average fault-free working time MTBF (ml) of the LED display unit is not less than 10000h.
6 Test methods
6.1 LED display hardware use environment Visual inspection of the hardware environment of the LED display, should meet the requirements of 5.1.
6.2 LED display software use environment Visual inspection of the software environment of the LED display, should meet the requirements of 5.2.
6.3 Structure and Appearance The structure and appearance of the LED display shall be checked by visual inspection and shall comply with the requirements of 5.3.
6.4 Safety requirements
6.4.1 Grounding The LED display shall be inspected by visual inspection and shall meet the requirements of 5.4.1.
6.4.2 Safety Marking The safety marking of the LED display shall be checked by visual inspection and shall meet the requirements of 5.4.2.
6.4.3 For the ground leakage current at 1.1 times the rated power supply voltage, the ground leakage current between the LED display power cable and the metal frame shall be tested to meet the requirements of 5.4.3.
6.4.4 Anti-electricity LED display power switch is in the on position. Apply 1500V (AC RMS) between the power input terminal and the metal frame or accessible metal structure, 1min, which should meet the requirements of 5.4.4.
6.4.5 The temperature rise LED display shall test the temperature of each accessible point with a thermometer after one hour of operation, and shall meet the requirements of 5.4.5.
6.5 Performance characteristics According to the different types of LED display, the performance characteristics of the LED display should be checked to meet the requirements of 5.5. Use the display test software for the text and graphic LED display to check the move in and out mode and display mode through visual inspection. Through the visual inspection of the computer video LED display screen, the computer animation is used to compare and check the animation function, and the LED display screen and the computer monitor are used to check the text display function, and the special grayware function is checked by the special test software. In addition to the above animation, text, and grayscale function check on the TV video LED display, there should also be a video source to check the TV and video functions. For various market LED displays, the corresponding test software should be used to check the market display function.
6.6 Uniformity The uniformity of the LED display screen shall be checked by visual inspection and shall meet the requirements of 5.6.
6.7 Out of control point The visual control method shall be used to check the out of control point of the LED display screen, which shall meet the requirements of 5.7.
6.8 Power supply The wattmeter is used to measure the power supply power of the LED display, which should meet the requirements of 5.8.
6.9 Environmental adaptability
6.9.1 High-temperature load test The high-temperature load test shall be carried out on the display unit in accordance with the provisions of GB2423.2. For indoor screens under (40±2)0C conditions, the outdoor screen shall be energized for 8 hours under conditions of (50±2)0C, each Check once in hours. Check the text input and removal mode, display mode, uniformity and out of control point on the text LED display and graphic LED display. Check the animation function, text display function, grayscale function, uniformity and runaway of computer video and TV video LED display Point. Check the market display function of the market LED display. Both should meet the requirements of 5.5, 6.6 and 5.7.
6.9.2 High-temperature storage test The high-temperature storage test is carried out according to the provisions of GB2423.2. The storage unit is stored under the condition of (60±2)0C for 4h, and after recovering for 4h at room temperature, the text LED display and diagram The LED display screen checks the shifting in and out mode, display mode, uniformity and out of control points. Check the animation function, text display function, grayscale function, uniformity and out of control points on the computer video and TV video LED display. The market display function check of the market LED display should meet the requirements of 5.5, 5.6 and 5.7.
6.9.3 Damp heat load test The damp heat load test shall be carried out on the display unit in accordance with the provisions of GB2423.3. For indoor screens at (40 ± 2) 0 C, relative humidity of 87% - 93%, for outdoor screens (50 ±2)0C, 8H for the relative humidity of 87%-93%, and check once every hour. Check the move-in and move-out mode, display mode, uniformity and out-of-control point on the text LED display and the graphic LED display. Check the market function of the market LED display. Both should meet the requirements of 5.5, 5.6 and 5.7.
6.9.4 Constant damp heat test Constant damp heat test shall be carried out on the display unit according to the provisions of GB2423.3. For indoor screens at (40±2)0C, relative humidity is 87%-93%, the outdoor screen is at (50± 2) 0C, storage of 48H under conditions of relative humidity of 87%-93%. Immediately after the storage test, the measurement of earth leakage current, electric strength and temperature rise shall be carried out, and the requirements of 5.4.3, 5.4.4 and 5.4.5 shall be met. After recovering 4H in the room temperature environment, check the text LED display and the graphic LED display screen to move in and out, display mode, uniformity and out of control points. Check the computer video and TV video LED display screen in and out mode, display mode Uniformity and out of control points. Check the animation function, text display function, grayscale function, uniformity and out of control point of the computer video and TV video LED display. Check the market display function of the market LED display. All of them should meet the requirements of 5.5, 5.6 and 5.7.
6.9.7 Vibration test Vibration test The specification of BG6587.4 is performed on the display unit. Under the condition of vibration frequency 5H-55H-5H and amplitude of 0.19MM, 5IMN scans once, in two directions, scans twice in each direction. After the end, check the text LED display and the graphic LED display and the graphic LED display to move in and out, display mode, uniformity and out of control points. Check the animation function and text display function on the computer video and TV video LED display. Gray-scale energy, uniformity and out of control points. Check the market display function of the market LED display and graphic LED display. All of them should meet the requirements of 5.5, 5.6, and 5.7.
6.9.8 Transportation test The test shall be carried out on the display unit according to the grade-level circulation conditions specified in GB6587.6. After the test, the text LED display and the graphic LED display shall be checked in and out, display mode, uniformity and out of control points. Check the animation function, text display function, grayscale function, uniformity and out of control points on the computer video and TV video LED display. Check the market display function of the market LED display. All should meet the requirements of 5.5, 5.6 and 7. The on-site transportation test shall be carried out for the LED display of the vehicle-mounted mobile work.
6.10 Reliability test The reliability test shall be carried out on the display unit according to the provisions of GB11463. A=20%, B=20%, DM=3.0. It is also allowed to carry out the reliability verification test according to the contract.
7 Inspection rules
7.1 Inspection Project
This product is for appraisal inspection and quality consistency inspection. The inspection rules are in accordance with the relevant provisions of GB 6593, and the inspection items and requirements are as specified in Table 1.
Table 1 Inspection items and requirements of LED display screen Test item identification Inspection quality consistency inspection technical requirements (chapter number) Inspection method (chapter number) Design production Group A Group C Group F hardware use environmental pollution â— â— â— -- - - 5.1 6.1 Software use environment â— â— â— -- -- 5.2 6.2 Appearance and structure â— â— â— -- -- 5.3 6.3 Safety requirements â— â— â— -- -- 5.4 6.4 Performance characteristics â— â— â— -- -- 5.5 6.5 Uniformity Sex â— â— â— -- -- 5.6 6.6 Out of control point â— â— â— -- -- 5.7 6.7 Power supply â— â— â— -- -- 5.8 6.8 Environment â— â— -- â— -- 5.9 6.9 Reliability â— â— -- -- â— 5.10 6.10 On-site use â— â—‹ -- -- -- According to the enterprise standard according to the enterprise standard â— is the item that must be inspected; â—‹ is the item that can be selected for inspection; -- is the item that does not carry out inspection.
7.2 Identification test
7.2.1 Identification test is divided into design qualification test and production appraisal test.
7.2.2 The qualification inspection shall be carried out by the designated department at the higher level or the quality inspection unit entrusted.
7.2.3 Sampling methods and inspection items
7.2.3.1 The hardware usage environment, software usage environment, structure and appearance, safety requirements, performance characteristics, uniformity, out of control, and power supply of the LED display shall be checked to meet the requirements of 5.1-5.8.
7.2.3.2 Randomly draw the LED display screen from 7.2.3.1 and obtain the set display unit to carry out the environmental adaptability test on schedule.
7.2.3.3 The certified LED display is on schedule. The requirements of 10 are to be tested for reliability. The timing fixed cut-off test scheme 1-2 specified in GB11463 is used.
7.2.3.4 Conduct on-site test of the LED display designed for identification.
7.2.4 Qualification criteria In the test of 2.2.3, 7.2.3.2, a second non-fatal failure is allowed, and the excess is judged as unqualified.
The inspection of 7.2.3.3 shall comply with the requirements of GB11463.
The inspection of 7.2.3.4 shall comply with the requirements of this standard and the LED display enterprise standard.
7.3 Quality consistency test
7.3.1 Quality consistency test is divided into group A test, group C test and group F test.
7.3.2 Group A test
7.3.2.1 Group A inspection is the inspection of the basic requirements of LED displays.
7.3.2.2 The items of the A group test are as specified in the expression. LED display screens need to be tested one by one. Any unqualified products must be returned to the production department for repair and re-inspection.
7.3.2.3 The test of Group A shall be carried out by the quality inspection department of the LED display production unit or the quality inspection unit commissioned by the manufacturer. The orderer may send representatives to participate.
7.3.3 Group C test
7.3.3.1 Group C inspection is an environmental suitability test.
7.3.3.2 For mass-produced products, when the production interruption time is greater than one month, each batch shall be subjected to environmental adaptability inspection, and the continuously produced products shall be subjected to environmental adaptability inspection once a year. When adapting design, workmanship, main components and materials, environmental adaptability testing is required.
7.3.3.3 The environmental adaptability test shall be carried out by the quality inspection department of the LED display production unit or the entrusted quality inspection unit.
The set is randomly selected in the display unit of the quality consistency group A test, and the environmental adaptability test is performed.
7.3.3.4 Secondary non-fatal failures are allowed throughout the environmental suitability test. After the repair, the inspection will continue from the unqualified project.
LED displays that fail to pass the environmental adaptability test are prohibited from leaving the factory. It is necessary to re-inspect all work-in-progress and finished products. Identify the cause and re-test the environmental adaptability.
7.3.3.5 Samples that have been tested for environmental suitability shall be marked and shall not be shipped as genuine.
7.3.4 Group F inspection
7.3.4.1 Group F inspection is a reliability test. Adopt the sequential censoring test scheme specified in GB11463 2-3
7.3.4.2 For mass-produced products, reliable reliability tests shall be carried out every year. Products that are continuously produced shall be tested for reliability for two years. Reliability tests shall be carried out when major designs, processes, main components and materials are changed.
7.3.4.3 The reliability test shall be carried out by the quality inspection department of the LED display production unit or the entrusted quality inspection unit. The sample is taken in accordance with the requirements of GB11463 in the display unit qualified for quality consistency inspection, and the reliability test is performed.
7.3.4.4 For LED displays that fail the reliability test, it is forbidden to leave the factory. All in-process and finished products need to be re-inspected. Re-test the reliability after finding out the cause.
7.3.5 Quality Qualification Determination The first inspection shall comply with the requirements of this specification, and the AF group inspection shall be qualified. The quality consistency test passed.
8 logo packaging transport and storage
The packaging, marking and storage of LED displays shall comply with the requirements of SJ/T 10463.
8.1 mark
8.1.1 Product logo
8.1.1.1 The nameplate should be installed in the appropriate position on the LED display.
8.1.1.2 The nameplate must contain the following contents
a. trademark;
b. product name or model number;
c. date of manufacture;
d. Name of the manufacturer.
8.1.2 Packaging mark The marking of the outer box of the LED display screen shall comply with the requirements of GB6388.
a. Product model and name;
b. trademark;
c. name of the manufacturer;
d. There are signs such as “upwardâ€, “careful and lightâ€, “fear of wetnessâ€, etc. These signs should meet the requirements of GB191.
e. Indicate the number of products, gross weight and packing date.
8.2 Packaging
8.2.1 Packed in a box that meets the requirements of the outer packaging mark.
8.2.2 The packaging must meet the requirements of moisture, vibration and corrosion protection.
8.2.3 Each batch of packing boxes shall be provided with a product inspection certificate, a packing list, a list of spare parts and a list of random documents in the calibration box.
8.3 Transport packaged products may be transported by any means of transport, but transport should be protected from rain, sun exposure, corrosive gases and mechanical damage.
8.4 Storage LED display storage temperature range 0-400C, relative humidity is not more than 80%, the surrounding environment is free of acid and alkali and corrosive gas, and there is no strong mechanical vibration, impact and strong magnetic field.
Please refer to the original document for the required chart.
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