This standard specifies the definition, classification, technical requirements, test methods, inspection rules and signs packaging transportation storage requirements for LED display. This standard applies to the LED display, LED full-color large screen, LED outdoor billboards, plaza screen, stage screen and a series of LED large screen display products. It is the LED display screen product design, manufacturing, installation, use, quality inspection and development of various technical standards, technical documents, the main technical basis.
2 references to the standard
The following standards contain provisions that are referenced in this standard and constitute the provisions of this standard. At the time of publication of the standard, the version shown are valid. All standards are subject to revision, the parties using this standard should explore the possibility of using the latest version of the following standards.
GB191-90 Packaging, storage and transportation of graphic symbols
GB2423.1-89 Basic Environmental Test Procedures for Electrical and Electronic Products Test A: low temperature test method
GB2423.2-89 Basic Environmental Test Procedures for Electrical and Electronic Products Test B: high temperature test method
GB2423.3-89 Basic Environmental Test Procedures for Electrical and Electronic Products Test B: high temperature test method
GB2423.3-89 Basic Environmental Test Procedures for Electrical and Electronic Products Basic Environmental Test Specification for Electronic Products Test Ca: Constant Damp Heat Test Method
GB4943-95 Safety of Information Technology Equipment (including Electrical Affairs Equipment)
GB6388-86 Transportation Packaging Receipt and Delivery Marking
GB6587.4-86 Vibration Test of Electronic Measuring Instruments
GB6587.6-86 Transportation Test of Electronic Measuring Instruments
GB6587.6-86 Transportation test of electronic measuring instruments
GB6593-86 Quality Inspection Rules for Electronic Measuring Instruments
GB9813-88 General Technical Requirements for Miniature Digital Computer
GB11463-89 Reliability Test of Electronic Measuring Instruments
SJ/T10463-93 Electronic Measuring Instruments Packaging, Marking, Storage Requirements
3 Definitions
This standard adopts the following abbreviations and definitions:
3.1 LED light-emitting diode ligth emitting diode LED light-emitting diode abbreviation
3.2 LED display LED panel Through certain control methods, used to display text, text, graphics, quotes and other information, Images, animation, quotes and other information, as well as television, video signals and display screen composed of an array of LED devices. According to the different combinations of pixels can be single and two-color text display and full-color screen display.
3.3 display unit display unit determined by the circuit and installation structure and has the function of displaying the smallest unit composed of LED display. Usually such as: outdoor P16 256mm * 256mm or 256mm * 128mm, P0d 320mm * 320mm, etc. LED display screen manufacturers offer 13724387515
3.4 fatal critical defect on the use, maintenance of the product or the personnel associated with it may cause harm or unsafe conditions, or unit product failure, or the product may cause harm to the personnel associated with the product. Condition of the failure, or the important characteristics of the unit product does not comply with the provisions of the unit product or the quality characteristics of the unit product seriously does not comply with the provisions.
3.5 out-of-control point out-of-control point luminescence state and control requirements of the display state does not match and discrete award of the LED basic light-emitting point, commonly known as uncontrolled pixel point.
3.6 pseudo-color LED panelpseudo-color LED panel in the LED display screen in different areas of the installation of different colors of single-color LED devices constitute the LED display.
3.7 all-color LED panel all-color LED panel LED display composed of red, green, blue three-color LED devices and can be adjusted out of a variety of colors.
4 Classification
LED display can be categorized according to the following conditions:
4.1 Use of the environment LED display is divided into indoor LED display, outdoor LED display and semi-outdoor LED display according to the use of the environment.
4.2 display color LED display according to the display color 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 levels of gray LED display, etc. LED display screen manufacturers offer 13724387515
4.3 display performance LED display according to the display performance is divided into text LED display, graphic LED display, computer video LED display, TV video LED display and quotation LED display. Quotation LED display generally includes securities, interest rates, futures, station and other uses of the LED display.
4.4 Basic light-emitting point non-quotation LED display, indoor LED display according to the use of LED single point diameter can be divided into Φ3mm, Φ375mm, Φ5mm, Φ8mm, and Φ10mm and other displays; outdoor LED display according to the use of the pixel diameter can be divided into Φ19mm, Φ22mm, and Φmm26 and other LED displays.
The LED displays of the quotation category can be divided into 2.0cm(0.8inch), 2.5cm(1.0inch), 3.0cm(1.2inch), 4.6cmm(1.8inch), 5.8cm(2.3inch), 7.6cm(3inch) and so on according to the size of the digital tube used in the LED display.
5 Requirements
5.1 Hardware use of LED display environment
LED display hardware part includes a general computer part, communication lines, special data conversion part and display part determined according to the type of LED display, area, use of the site and other conditions. In the detailed specification should indicate:
a. The host computer, a variety of optional plug-in cards, external devices and communication interface requirements;
b. The requirements of the communication line and indicate the maximum communication distance; under normal circumstances, the transmission distance of the network cable for the 98 meters, such as exceeding the fiber optic transmission.
c. Data conversion part of the communication with the host computer; control system connection.
d. Power supply requirements and structural installation requirements, must be the maximum enough Oh that probability of power distribution.
5.2 LED display software to use the environment LED display screen manufacturers offer 13724387515
The different performance of the LED display should be configured to meet the requirements of its display function of the display software, which has the following functions:
a. Meet the requirements of the series, standardization, and can be backward compatible;
b. Adopt the operating system and language specified in the detailed specification;
c. Equipped with a comprehensive self-test program and as needed, equipped with a variety of levels of diagnostic procedures;
d. For special purposes of the LED display screen is equipped with its corresponding special software.
5.3 Structure and Appearance
5.3.1 Structure The LED display screen part can be made of steel, aluminum, wood and other materials. The structure is required to be strong and beautiful. Of course, there are also special structural methods such as hanging structure.
5.3.2 Appearance LED display screen frame without obvious scratches. Outdoor LED display pixel tube installation should be consistent, no loose and tube shell broken column.
5.4 Safety requirements
LED display screen is GB4943 class I safety equipment.
5.4.1 LED display screen protection ground terminal.
5.4.2 Safety marking
5.4.2.1 The LED display screen protection ground terminal should be marked.
5.4.2.2 The LED display should have warning signs at the fuse and switching power supply.
5.4.3 Leakage Current to Ground The leakage current to ground of the LED display should not exceed 3.5mA (RMS AC).
5.4.4 Resistant strength LED display screen can be 50HZ, 1500V (AC rms) test voltage 1min should not occur insulation breakdown.
5.4.5 temperature rise LED display screen positive party use after reaching thermal equilibrium in the metal part of the temperature rise does not exceed hard 45K, the temperature rise of the insulating material does not exceed 70K.
5.5 LED display screen performance characteristics
Text LED display screen and graphic LED display screen should have in the detailed specification of the move-in move-out method and display mode. The way to move in and out of the detailed specifications and display mode.
Computer video LED display screen should have:
Animation. Requirements LED display screen animation display and computer monitor corresponding area display consistent; text display function. Requirements for text display stable, clear crosstalk; gray scale function. Requirements with the level of gray scale specified in the detailed specification. Television video LED display screen in addition to animation, text display, grayscale function, should be able to screen television, video images. Quotation LED display screen with its corresponding quotation display capacity LED display screen manufacturers offer 1 37 24 38 75 15.
5.6 Uniformity should be specified in the detailed specification of the uniformity of the LED display screen requirements.
5.7 Loss of control point The loss of control point of indoor LED display screen is not greater than three ten thousandths of a point, the loss of control point of outdoor LED display screen should be less than three thousandths of a point; and discrete distribution.
5.8 power supply LED display screen power supply 220W ± 10%, 50HZ ± 5% or 80V ± 10%, 50HXZ ± 5% should be specified in the detailed specification of the various types of LED display screen unit display area of the maximum power consumption or total power consumption of the LED display.
5.9 Environmental adaptability
5.9.2.1 Temperature The ambient temperature of the indoor screen: working environment low temperature: 0C; high temperature: +40C. storage environment low temperature: -40C; high temperature: +60C.
Outdoor screen ambient temperature: working environment low temperature: optional -20C, -10C; high temperature: +50C. storage environment low temperature: -40C; high temperature: +60C. storage environment low temperature: -40C; high temperature: +60C.
5.9.2.2 Moisture and heat At the maximum operating temperature, the LED display should be able to work normally under the condition of 90% relative humidity.
5.9.3 Vibration LED display screen to withstand automobiles, trains, airplanes and other transportation, loading and unloading, moving vibration. Vehicle-mounted screen should be able to work normally in the operation of the vehicle installed. To have a high seismic performance, recently my company to customers to do a number of vehicle-mounted LED display screen to the high standard of anti-vibration performance widely praised by customers.
5.9.4 Transportation LED display screen can be transported using cars, trains, airplanes and other common means of transportation.
5.10 Reliability Requirements The average MTBF (ml) of the LED display unit is not less than 10000h.
6 Inspection Methods
6.1 Hardware Environment of LED Display Screen The hardware environment of LED display screen is checked visually, and it should be in line with the requirements of 5.1
6.2 Hardware Environment of LED Display Screen
5.9.5 Transportation The LED display unit can be transported by cars, trains, airplanes and other common transports. p>6.2 LED display screen software environment Check the LED display screen software environment by visual inspection, should meet the requirements of 5.2.
6.3 Structure and Appearance Visually inspect the structure and appearance of the LED display screen should meet the requirements of 5.3.
6.4 Safety Requirements
6.4.1 Grounding Check the LED display screen visually, should meet the requirements of 5.4.1.
6.4.2 Safety marking Visually check the LED display screen safety marking, should meet the requirements of 5.4.2.
6.4.3 Leakage current to ground Under 1.1 times the rated supply voltage, test the LED display screen power cord to the metal frame leakage current to ground, should meet
5.4.3 requirements.
6.4.4 Resistant strength LED display large screen power switch is in the on position, in the power input and the metal frame or accessible metal structural components between the application of 1500V (AC RMS), 1min, should meet the requirements of 5.4.4. Large screen manufacturers offer 1 37 24 38 75 15
6.4.5 Temperature rise LED display screen in the work of one hour with a thermometer to test the temperature of each accessible point, should meet the requirements of 5.4.5.
6.5 Performance characteristics According to the different types of LED display screen, the LED display screen performance characteristics of the check, should meet the requirements of 5.5. Text, graphic LED display screen using display test software by visual inspection to check the way to move in and out of the way and display. Computer video LED display screen through visual inspection, with the projection of computer animation for comparison to check the animation function, with the LED display screen and computer monitor to check the text display function, with special test software to check the grayscale function. Large screen manufacturers offer 1 37 24 38 75 15, on the TV video LED display screen in addition to the above animation, text, grayscale function check, there should also be a video source to check the TV, video function. For a variety of quotes LED display large screen, should use the appropriate test software to check its quotes display function.
6.6 Uniformity Check the uniformity of the LED display screen by visual inspection, should meet the requirements of 5.6.
6.7 Points of failure to visually check the LED display screen of the point of loss of control, should meet the requirements of 5.7.
6.8 Power supply power supply with a wattmeter to measure the power supply power LED display screen, should meet the requirements of 5.8.
6.9 Environmental adaptability
6.9.1 High temperature load test High temperature load test according to the provisions of GB2423.2 for the display unit. The indoor screen in (40 ± 2)0C conditions, the outdoor screen in (50 ± 2)0C conditions powered on 8h, every hour for inspection. Text LED display screen and graphic LED display screen to check the move in and out of the way, display, uniformity and out of control point. Computer video and TV video LED display screen check the animation function, text display function, grayscale function, uniformity and out of control points. Quotation LED display screen for quotation display function check. All should meet the requirements of 5.5, 6.6 and 5.7.
6.9.2 High temperature storage test High temperature storage test according to the provisions of GB2423.2 display unit. In (60 ± 2)0C conditions storage 4h, 4h recovery at room temperature conditions, the text LED display screen and graphic LED display screen to check the way to move in and out of the way, display mode, uniformity and loss of control point fixed. Computer video and TV video LED display screen check animation function, text display function, grayscale function, uniformity and runaway point. Large screen manufacturers offer 1 37 24 38 75 15, ticker LED display screen for ticker display function check. All should meet the requirements of 5.5, 5.6 and 5.7.
6.9.3 Moisture and heat load test Moisture and heat load test according to the provisions of GB2423.3 on the display unit. Indoor screen in (40 ± 2)0C, relative humidity of 87% -93% of the conditions, the outdoor screen in (50 ± 2)0C, relative humidity of 87% -93% of the conditions of power work 8H, every hour into a check. Text LED display screen and graphic LED display screen to check the move in and out of the way, display mode, uniformity and out of control point fixed. Quotation LED display screen for quotation function check. Should meet the requirements of 5.5, 5.6 and 5.7.
6.9.4 Constant humidity and heat test Constant humidity and heat test according to the provisions of GB2423.3 on the display unit. Indoor screen in (40 ± 2)0C, relative humidity of 87% -93% of the conditions, the outdoor screen in (50 ± 2)0C, relative humidity of 87% -93% of the conditions of storage 48H. storage test is over, immediately after the ground leakage current, resistance to electric strength and temperature rise measurements should meet the 5.4.3, 5.4.4, 5.4.5 to be required. Large screen manufacturers offer 1 37 24 38 75 15 and then in the room temperature environment to recover 4H, the text LED display screen and graphic LED display screen check the way to move in and out of the way, display, uniformity and out of control points. Computer video and TV video LED display screen to check the way to move in and out of the way, display mode, uniformity and out of control point fixed. Check the animation function, text display function, grayscale function, uniformity and out-of-control point on computer video and TV video LED display screen. Quotation LED display screen for quotation display function check. All should meet the requirements of 5.5, 5.6 and 5.7.
6.9.7 Vibration test Vibration test BG6587.4 provisions of the display unit. In the vibration frequency 5H-55H-5H, amplitude of 0.19MM under the conditions of 5IMN scanning once, two directions, each direction scanning twice. At the end of the test, the text LED display screen and graphic LED display screen and graphic LED display screen were checked for moving in and out, display mode, uniformity and out-of-control points. The computer video and TV video LED display screen to check the animation function, text display function, grayscale performance, uniformity and out of control points. Quotation LED display screen and graphic LED display screen for quotation display function check. Should meet the requirements of 5.5, 5.6, and 5.7.
6.9.8 Transportation test Transportation test according to GB6587.6 cab level circulation conditions on the display unit. After the test. Text LED display screen and graphic LED display screen to check the move in and out of the way, display mode, uniformity and out of control points. On the computer video and TV video LED display screen to check the animation function, text display function, grayscale function, uniformity and out of control points. Large screen manufacturers offer 1 37 24 38 75 15 on the ticker LED display screen to check the ticker display function. All should meet the requirements of 5.5, 5.6 and 7 set. On-vehicle mobile work LED display screen, should be carried out on-site transportation test.
6.10 Reliability test Reliability test according to the provisions of GB11463 on the display unit. A = 20%, B = 20%, DM = 3.0. also allows the contract to verify the reliability of the test set.
7 Inspection Rules
7.1 Inspection Items
7.2 Identification Inspection
7.2.1 Identification Inspection is divided into the design of identification inspection and production identification inspection.
7.2.2 Identification inspection by the higher level of the designated department or commissioned quality inspection unit is responsible for carrying out.
7.2.3 Sampling methods and test items
7.2.3.1 LED display hardware environment, software environment, structure and appearance, safety requirements, performance characteristics, uniformity, loss of control, power supply
power supply to check, should meet the 5.1-5.8 to be required.
7.2.3.2 from 7.2.3.1 inspection of qualified LED display screen randomly selected to obtain a set of display units according to the period of .9 for environmental adaptability testing.
7.2.3.3 Identification of the LED display screen according to the period. 10 requirements for reliability testing. The use of GB11463 provisions of the timing of the number of cut-off test program 1-2.
7.2.3.4 Identification of the design of the LED display screen on-site use of the test.
7.2.4 Qualifying criteria in the former .2.3.1, 7.2.3.2 test, allowing the emergence of the second non-fatal failure, more than one is judged to be unqualified.
7.2.3.3 of the test should be consistent with the requirements of GB11463.
7.2.3.4 of the test should be consistent with the requirements of this standard and LED display screen enterprise standards.
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 test for the LED display screen basic requirements of the test.
7.3.2.2 Group A inspection items according to the expression of the provisions of the LED display screen need to be tested set by set. Failure of any one of the products are required to return to the production department to repair and re-provide inspection.
7.3.2.3 Group A inspection by the LED display screen production unit quality inspection department or commissioned by the quality inspection unit is responsible for carrying out, the ordering party can send a representative to participate.
7.3.3 Group C inspection
7.3.3.1 Group C inspection for environmental adaptability test.
7.3.3.2 Mass-produced products, production breaks more than one month, each batch should be environmental adaptability test, continuous production of products once a year for environmental adaptability test. Change the design, process, major components and materials, to carry out environmental adaptability testing.
7.3.3.3 Environmental suitability test by the LED display screen production unit quality inspection department or commissioned quality inspection unit responsible for. In the quality consistency of A group test qualified display unit in a random sample to obtain a set of environmental adaptability test.
7.3.3.4 In the environmental adaptability test throughout the process allows the emergence of two non-fatal failure. After the repair from the failure of the project to continue to test. Environmental suitability test failed LED display screen, prohibited from leaving the factory. And need to re-inspection of all in-process and finished products. Find out always the reason for re-environmental adaptability test. Screen manufacturers offer 1 37 24 38 75 15
7.3.3.5 The environmental suitability test samples should be printed with a mark, should not be shipped as a genuine product.
7.3.4 Group F test
7.3.4.1 Group F test is a reliability test. The use of GB11463 sequential cut-off test program 2-3
7.3.4.2 Mass production of products, each year should be difficult to test the reliability of continuous production of products for two years to conduct a reliability test to change the main design, process, the main components and materials to be tested for reliability.
7.3.4.3 Reliability test by the LED display screen production unit quality inspection department or commissioned quality inspection unit responsible for. In the quality consistency test qualified display unit in accordance with the requirements of GB11463 to take samples for reliability testing.
7.3.4.4 Reliability test failed LED display screen, prohibited from leaving the factory. And need to re-inspection of all in-process and finished products. Find always the cause of the reliability test again.
7.3.5 quality judgment The first test should be consistent with the requirements of the specification, A-F group test should be qualified. Quality consistency test passed.
8 Marking, packaging, transportation, storage
7.3.5 Judgment of quality shall meet the requirements of this specification.