Weak current College】 【led display acceptance in industry-standard text.

<br> 1. scope <br> This standard establishes the led display of definitions, classifications, technical requirements, test procedure, inspection rules and marks the storage requirements for transport packaging. This standard applies to led display products. It is the led display .product design, manufacturing, installation, use, quality inspection and formulate technical standards, technical documents technical basis. <br> 2. the reference standards <br> The provisions contained in the following standard quoted in the standard to form the clauses of this standard .. In the standard published, all versions are effective. All standards will be revised, using the standard parties should explore using the following criteria for the latest version of the possibilities. <br> GB191-pictorial diagram marks 90 <br> GB2423.1 .-89 and electrical products testing of basic environmental testing regulations: A low-temperature test method <br> GB2423.2-89 electrician electronics basic environmental testing regulations test B: high temperature test method <br> GB2423.3-89 electrician electronics basic .environmental testing regulations test Ca constant damp heat test method <br> GB4943-95 information technology devices (including electrical business equipment) <br> GB6388-86 transport packaging consignor logo <br> GB6587.4-86 vibration test of electronic measuring instruments < .br> GB6587.6-86 experimental electronic measuring instruments transport <br> GB6593-86 electronic measuring instruments quality inspection rules <br> GB9813-88 miniature digital electronic computer General technical specifications <br> GB11463-89 reliability test of electronic measuring instruments < .br> SJ/T10463-93 electronic measuring instruments packing, marking, storage requirements <br> 3. define <br> This standard uses the following abbreviations and definitions: 3.1 LED led ligth emitting diode LED luminous diode's initials 3.2 led display panel LED by .a certain degree of control that is used to display text, text, graphics, images, animations, quotes and other information as well as television, video signal and led device array consisting of the display screen. 3.3 display cell display unit consists of a circuit .and installation of structures identified and has a display function of the led display of the smallest unit. 3.4 deadly substandard critical defect on use, maintenance, product, or a related person may cause harm or insecurity, or units of the important characteristics of the product .does not conform to the requirements or unit product quality characteristics of serious irregularities. 3.5 runaway points out-of-control point light status and control requirements display status do not match and the discrete awarded LED luminous point. Basic 3.6 pseudo color led display panel in .pseudo-color LED LED display in different areas of different colors of single-radix color led device consisting of a led display. 3.7 full color led display panel all-color LED by red, green, blue, composed of three primary colors led device and .adjustable multiple-colour led display. <br> 4. classification <br> Led screen can be classified according to the following conditions: <br> 4.1 use environment led display by using the environment into indoor LED sign and outdoor led sign. <br .> 4.2 display color led display by display colors are divided into single-color led display (including pseudo color LED display), dual-color led display and full-color (trichromatic) led display. According to the shades can be divided into 16, .32, 64, 128, 256-level grayscale, led display, etc. <br> 4.3 display performance led display by display performance into text led display, LED display, computer graphics and video led screen, TV, video led screen and market led .display, etc. Market led display generally include securities, interest rates, futures, and other uses of LED display screen. <br> 4.4 basic non-luminous point market class led display, indoor led display led by a single point of diameter can be .divided into 3 mm, Φ Φ 375 mmmm, Φ 5, Φ 8 mm, and Φ 10 mm, and other display; outdoor led display by using the pixel diameter Φ can be divided into 19 mmm, 22 m and Φ Φ mm 26, .led display. <br> Market class led screen in the use of digital tube size divisible 2.0cm (0.8inch), 2.5cm (1.0inch), 3.0cm (1.2inch), 4.6cmm (1.8inch), 5.8cm (2.3 .inch), 7.6cm (3inch) led display. <br> 5. requirements <br> 5.1 led display hardware usage environment <br> Led display hardware components including led display type, area, use the site, and other conditions of general computer .parts, communication lines, dedicated data conversion and display section. In the detailed specification should indicate: <br> A. computer host, all kinds of matching cards, external devices and communications interface requirements; <br> B. requirements for communication line and .indicate the maximum communication distance; <br> C. the data conversion section of the machine host means of communication; <br> D. power supply requirements and structure installation requirements. <br> 5.2 led display software environment <br> On the different .properties of led display screen should be configured to meet the functional requirements of its display shows the software that has the following features: <br> A. comply with serialization, standardization requirements, can be down-<br> B. use the detailed specifications .in the operating system and language; <br> C. distributionImprove the self-test and as needed with various levels of Diagnostics; <br> D. special-purpose led display with its corresponding specialized software. <br> 5.3 structure and appearance < .br> 5.3.1 structure led display segment can be steel, aluminum, wood and other materials. Requires strong structure, beautiful. <br> 5.3.2 appearance led displays a bounding box without obvious scratches. Outdoor led display pixel pipe installation should be .consistent, no loose and tube shell broken column. <br> 5.4 security requirements led screen in the case of the I class GB4943 safety equipment. <br> 5.4.1 led display protective earth terminal. <br> Tag 5.4.2 security < .br> 5.4.2.1 led screen protection earthing terminal should be marked. <br> 5.4.2.2 led screen in the fuse box and switch the power supply should be a warning sign. <br> 5.4.3 the leakage current in led display on .leakage current must not exceed 3.5mA (AC RMS). <br> 5.4.4 dielectric strength led screen can 50HZ, 1500V (AC RMS) test voltage 1min insulation breakdown should not occur. <br> 5.4.5 temperature rise led display is .when the party uses thermal equilibrium is reached after the metal part of the temperature rise shall not exceed hard 45K, insulation temperature rise shall not exceed 70K. <br> 5.5 led display performance characteristics <br> Text led display and frame led screen should have .the detail specification in the move out of the way and show the way. <br> The animation function. Requirements for led display animated and computer monitor display consistent corresponds to the region; text display function. Request text display stable, clear crosstalk; grayscale .function. Required to have provisions in the detailed specification of the level of gray. TV video led screen in addition to animation, text display, grayscale function, should be able to show, TV, video screen. Market led display with its corresponding ticker display .capabilities. <br> 5.6 uniformity should be provided in the detailed specification on led display uniformity requirements. <br> 5.7 runaway points out indoor led display is not more than 35 points, outdoor led display control points should not at par; and as a .discrete order. <br> 5.8 power LED display monitor's power supply to 220W ± 10%, 50HZ ± 5% or ± 10%, 80V 50HXZ ± 5% shall be provided in the detailed specification for all kinds of led display units show area of .maximum power consumption or total consumption of the led display. <br> 5.9 environmental adaptability <br> 5.9.2.1 temperature indoor screen environment temperature: working environment temperature: 00C; high temperature: + 400C. Low-temperature storage environment:-400C; .high temperature: + 600C. <br> Outdoor screen environment temperature: working environment temperature: optional-200C,-high-temperature: + 100C; 500C. Low-temperature storage environment:-400C; high temperature: + 600C. <br> .5.9.2.2 moist heat at the maximum operating temperature, the led screen should be in the relative humidity of 90% of the normal working condition. <br> 5.9.3 vibration led display under cars, trains, aircraft and other transportation, loading and .unloading, moving in vibration. Car screen should be in the installation of vehicle operation. <br> 5.9.4 transport led screen can use cars, trains, aircraft and other common carriers. <br> 5.10 reliability requirements led screen display unit average no .fault working time MTBF (ml) of not less than 10000h. <br> 6. test method <br> 6.1 led display hardware usage environment with Visual mode check the led display hardware usage environment should meet the requirements of 5.1. <br> 6.2 .led display software using Visual styles check environment LED display monitor's software environment, should be consistent with the requirements of 5.2. <br> 6.3 structure and appearance using Visual styles check led display monitor's structure and appearance, shall conform to the requirements of 5.3. < .br> 6.4 security requirements <br> 6.4.1 grounding Visual mode check the led display, should meet the requirements of the 5.4.1. <br> 6.4.2 security token using the Visual way to check the led display security tag 5.4. .2, should meet the requirements. <br> 6.4.3 on leakage current at rated power supply voltage 1.1 times, test led display power cord for the metal frame on the floor drain currents, should meet the requirements of article 5.4.3. < .br> 6.4.4 dielectric strength led display power switch is in the common position, the power input and the metal frame or reach metal structures imposed between 1500V (AC RMS), 1min, should meet the requirements of 5.4.4. <br> .6.4.5 temperature rise led screen in the work one hour later with a thermometer to test the reach point 5.4.5 temperature, should meet the requirements. <br> 6.5 performance characteristics according to the different kinds of led display, led display performance characteristics .for inspection, shall meet the requirements of 5.5. To text, graphics and led screen display test software is used by Visual inspection to move out of the way and show the way. On the computer video led screen through Visual, use show computer animation for .comparison check animation features, with led display and computer monitor display to check the text, using a dedicated measurement software to check the grayscale function. On the TV video led screen in addition to the above animation, text, grayscale function checks, should also have .the video source check TV and video functions. On various market led screen, you should use the beta software to check the ticker display. <br>> How to use Visual uniformity 6.6 check LED Xianping uniformity, should meet the requirements of 5.6. < .br> 6.7 runaway points with Visual way to check the led display monitor's out of control points, should meet the requirements of 5.7. <br> 6.8 power use wattmeter led display of power, the power supply shall meet the requirements of 5.8. <br .> 6.9 environmental adaptability <br> 6.9.1 high temperature load test high temperature load test according to the provisions on display GB2423.2 cell. indoor screen in (40 ± 2) 0C, outdoor screen to (50 ± 2) 0C conditions power .work for 8h, once per hour. Led display for the text and graphics and led display check into moved out of the way, display mode, uniformity and out of control points. pair of computers video and TV video led screen check the animation function, .text display function, gamma function, uniformity and out point. market led display for quotes display function check. Should meet 5.5, 6.6 and 5.7 requirements. <br> 6.9.2 high temperature storage test high temperature storage test according to the provisions on display .GB2423.2 cells. (60 ± 2) conditions of storage 4h 0C, at room temperature after recovery, the text 4h LED display and frame led display check into moved out of the way, display, and control points. On the computer, video .and TV video led screen check the animation function, text display function, gamma function, uniformity and out of control points. On the market to market led screen display function checks should meet 5.5., 5.6 and 5.7 requirements. <br> 6.9.3 .damp heat load testing-moisture load test according to the provisions on display GB2423.3 cell. indoor screen in (40 ± 2) 0C, relative humidity: 87% -93% of all conditions, outdoor screen to (50 ± 2) 0C ., relative humidity: 87% -93% of the work under power, hourly into 8H once questioning. Led display for the text and graphics and led display check into moved out of the way, display mode, uniformity and out of control points. On .the market for led display quotes function check. Should meet 5.5, 5.6 and 5.7 requirements. <br> 6.9.4 constant damp heat test constant humidity test according to the provisions on display GB2423.3 cell. indoor screen in (40 ± 2) .0C, relative humidity: 87% -93% of all conditions, outdoor screen to (50 ± 2) 0C, relative humidity: 87% -93% of inventory 48H. Storage test immediately after, on the floor drain current, resistance strength and .temperature measurements, should meet 5.4.3, 5.4.4, 5.4.5 of the request. Then restore the room temperature environment, the text after 4H LED display and frame led display check into moved out of the way, display mode, uniformity and .out of control points. pair of computers video and TV video led screen check into moved out of the way, display mode, uniformity and out of control points. On the computer, video and TV video led screen check the animation function, text display function ., gamma function, uniformity and out point. market led display to show feature check prices should meet 5.5., 5.6 and 5.7 requirements. <br> 6.9.7 BG6587.4 vibration test vibration test of the display unit in vibration frequency, amplitude as .5H-55H-5H 0.19MM conditions, 5IMN scan once, second direction, each direction scanning second-test is finished, the text led display and frame led display and frame led display check into moved out of the way, display mode, uniformity and .out of control points. pair of computers video and TV video led screen check the animation function, text display function, grayscale, uniformity and out point. market led display and graphic display of led display screen for quotes should be functional check. meet 5.5, .5.6, and 5.7 requirements. <br> 6.9.8 transport test migration test press GB6587.6 taxis-flow conditions on display unit-test is finished. text led display and frame led display check into moved out of the way, display mode, .uniformity and out of control points. pair of computers video and TV video led screen check the animation function, text display function, gamma function, uniformity and out of control points. On the market to market led screen display function checks should meet 5.5., .5.6 and 7 requirements. For in-car mobile work led display, test should be conducted on-site transportation. <br> 6.10 reliability test reliability test requirements by GB11463 display unit. A = 20%, B = 20%, DM = 3.0 .. in accordance with the contract provisions also allow for reliability verification test. <br> 7. inspection rules <br> 7.1 inspection items <br> 7.2 identification test <br> 7.2.1 qualification examination is divided into design qualification testing and production identification .tests. <br> 7.2.2 identification inspection by assigned sector or delegate responsibility for quality inspection units. <br> 7.2.3 sampling methods and survey project <br> 7.2.3.1 on led display hardware usage environment, software environment, structure and .appearance, safety requirements, performance characteristics, uniformity, out of control, power supply <br> Check the power supply shall meet 5.1-5.8 to requirements. <br> 7.2.3.2 from 7.2.3.1 inspection qualified led screen randomly have a display unit .for periodical inspection of environmental adaptability .9. <br> 7.2.3.3 on identification of periodical of led display. 10 the requirements for reliability testing-the timer used GB11463 censored test programme 1-2. <br> 7.2.3.4 on design and .identification of led display for on-site use test. <br> 7.2.4 eligible criteriaIn the previous examination of the 7.2.3.2 .2.3.1, allowed the second non-lethal unqualified persons sentenced to more than to be ineligible. <br .> 7.2.3.3 inspection shall comply with the requirements of GB11463. <br> 7.2.3.4 inspection shall conform to this standard and the led display enterprise standards. <br> 7.3 quality consistency test <br> 7.3.1 quality consistency test is divided .into A set of test, inspection and group c F group test. <br> 7.3.2 A group test <br> 7.3.2.1 A group test the basic requirements for led display. <br> 7.3.2.2 A group test project by .an expression. Led display for each set of required; on any unqualified products shall be returned to the production sector repair <br> Provide inspection after the restart. <br> 7.3.2.3 A group test by led display producers quality inspection department or Commission .units responsible for the quality inspection, ordering party may be represented. <br> 7.3.3 C group inspection <br> 7.3.3.1 C group test for environmental adaptability tests. <br> 7.3.3.2 mass-produced products, production interruption time .greater than months, each batch should be environmental adaptability tests, continuous production of products once a year <br> Environmental adaptability tests. To change the design, engineering technology, major components and materials, to carry out environmental adaptability tests. <br> 7.3 ..3.3 environmental adaptability tests by led display producers quality inspection department or Commission units responsible for the quality inspection. <br> Consistency in quality inspection of A group display unit in a random drawing to be set, for environmental adaptability tests. <br> 7.3 ..3.4 in environmental adaptability tests the whole process allowed the second non-fatal. Having repaired from a non-qualified projects continue to carry out the inspection. <br> Environmental adaptability inspection unqualified led display, non-factory. And to all products and .finished products for back testing-find out why always <br> Environmental adaptability tests again. <br> 7.3.3.5 through environmental adaptability test samples shall bear the marking, should not be used as original factory. <br> 7.3.4 F group .inspection <br> 7.3.4.1 F group test for reliability testing. Use of the sequential GB11463 censored test scenario 2-3 <br> 7.3.4.2 mass-produced products, should be carried out every year to test the reliability, continuous production of .the product for two years, change major reliability test design, engineering <br> Arts, major components and materials to test for reliability. <br> 7.3.4.3 reliability test by led display producers quality inspection department or Commission units responsible for the quality inspection .. In quality consistency test qualified Hin <br> Indicated in the unit in a sample GB11463 demands, reliability test. <br> 7.3.4.4 on reliability test of led screen, non-factory. And to all products and finished products are tested. .Find out why after always <br> Test for reliability. <br> 7.3.5 quality judgment first inspection shall comply with the requirements of this specification, the inspection shall AF group. Quality conformance inspection. <br> 8. packaging, transport storage .<br> A selection of led display is to select high quality led displays, and the other is choosing the right led display products. General selection led display is based on the use of the environment and the characteristics of the user to select. In general .we recommend that customers want to watch out for some of the features: <br> 1. try to use the new wide angle pipe it wide angle, color pure, consistent coordination, life of more than 10 000 hours. <br> 2. .display of outer package options are the most popular external packaging with shade along the square tube, silicone seal, no metal Assembly. The appearance of exquisite appearance, durable, resistant to direct sunlight, dust-proof, waterproof, resistant to high temperature and five .protection against short circuit. <br> 3. According to the characteristics of different led display, combined with the actual needs of users, select the appropriate screen. <br> (1) for the station, dock, big market entrance, Elevator passenger .boot, use d5.0mm monochrome display. Clear with fonts, affordable, fleet control advantages. <br> (2) for banks, shopping malls etc used for showcase corporate identity, advertising, and other applications that require low-cost, use φ .3.75 mm double-color display. If you are required to display the effect is good, you can use the φ 5 mm full-color display. <br> (3) for the Hall and other large, use φ 5 mm double-color .display. If you are required to display the results, use φ 10 mm full-color display. <br> (4) for banking, postal services, electricity and other business Hall, used to define the service window of the function, use φ .φ 3 m or 5 mmm led screen display for easy replacement of Windows services at any time. <br> <br>.