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Heze set Tao Chengwu County Juye single LED display five key indicators of economic Ning Shengjia Optoelectronics Technology is an experienced professional outdoor advertising production company, specializing in the design, manufacture, installation service. Ji Ning Shengjia preferred photoelectric led display specializing in the design, development, production and sales led unit panel display, full-color indoor and outdoor color monochrome p4, p6, p10, p16 full range of LED displays and billboards advertising light boxes offer. large spot, welcome to call us Heze Juye LED display consists of a light-emitting diode array row combination, the quality of LED directly affect the overall quality of the display. Decided to have five LED indicators of quality: the brightness and viewing angle, uniformity and clarity, the pixels out of control rate, life expectancy, energy consumption and energy efficiency. Factors that affect the life of the LED display are internal and external factors, internal factors such as a peripheral component performance, the performance of LED devices, products, anti-fatigue properties; internal working environment with LED display and so on. Cooling is a key factor in the life of the LED display quality and impact. Heze Juye five key indicators LED display LED (light emitting diode) displays the importance of like a car engine, the air conditioning compressor. Choose good-performance LED is the completion of the basic conditions for a high-performance LED display. However, even the same dishes, the same spices, the same stove, different levels of chefs may cook dishes vary. Therefore, it is able to use good test LED display manufacturer touchstone. Is generally believed that the display has the following five key performance indicators and quality parameters are closely related LED: brightness and viewing angle, uniformity and clarity, the pixels out of control rate, life expectancy, energy consumption and energy efficiency. First, the brightness and viewing angle LED display brightness depending on the density of luminous intensity and LED. In recent years, new technology LED substrate, epitaxy, chip and package, etc. after another, especially indium tin oxide (ITO) current spreading layer technology and process stability and maturity, the LED luminous intensity has been greatly improved. At present, the world-class brand of small power LED in the horizontal viewing angle of 110 degrees vertical viewing angle is 50 degrees, the emission intensity of the green tube has reached 4000mcd, red tubes up to 1500mcd, blue tube of 1000mcd. 20mm pixel pitch, the display brightness can reach 10000nit more. The display can work around the clock in any environment in perspective when it comes to the display, there is a phenomenon worthy of our consideration: LED display, especially outdoor display, the viewing angle is basically people from the bottom up, and to existing LED display products morphological point of view, half flux vanishing into the sky. In the energy crisis of today, we have a more reasonable way to solve? Worth considering. Second, the uniformity and clarity of Heze Juye LED display technology development today, the uniformity has become the most important measure of the merits of the display. It is often said LED display "little brilliant, brilliant piece" is a serious image problem for uneven between pixels and modules metaphor. Professional thing to say is "dust effect" and "mosaic." The root cause of uneven are: inconsistency LED performance parameters; the display in the production, installation assembled lack of precision; the electrical parameters is not enough consistency to other electronic components; module, PCB design is not standardized. The "inconsistent with the performance parameters of the LED" is the main reason. These inconsistent performance parameters include: light intensity is inconsistent, the optical axis is inconsistent, inconsistent color coordinates, inconsistent color light intensity distribution curve of each group and damping characteristics inconsistent. How to solve the inconsistency LED performance parameters, there are two main technologies industry ways: First, by further subdivision of LED specifications to improve the consistency of the performance of LED; the second is through a subsequent correction of ways to improve the display uniformity. Follow-up correction correction from earlier modules, the module calibration, development of today's by-point correction. Correction from simple light intensity correction, color coordinate the development of light intensity correction. However, we believe that the subsequent correction is not a panacea. Wherein the optical axis is inconsistent, the light intensity distribution curve is inconsistent, inconsistent attenuation characteristics, poor accuracy and assembly design is not standardized, can not be eliminated by a subsequent correction, even this correction will follow the optical axis, attenuation, assembling accuracy of inconsistent worse. Therefore, we conclude that the practice: Subsequent correction is only symptomatic, and LED segments is the fundamental parameters, LED display is the future mainstream industry. In terms of the relationship between uniformity and clarity of the display, the industry there is often erroneous understanding, that is an alternative to the resolution clarity. In fact, the display resolution of the display resolution of the human eye, uniformity (SNR), brightness, contrast and many other factors of subjective feelings. Simply reduce physical pixel pitch increased resolution, while ignoring uniformity, to improve the clarity is no doubt. Imagine a grave there, "dust effect" and "mosaic" of the display, even though its physical pixel pitch and then a small, high-resolution and then, it is impossible to get a good image clarity. Thus, in a sense, the current constraints LED display resolution improvement is the main cause of "uniformity" rather than "physical pixel pitch." Third, the display pixel display pixels out of control out of control resulting in a lot of reasons, the most important reason is that "LED failure." LED main cause of failure can be divided into two aspects: First LED its poor quality; the second is to use improper methods. Through analysis we summarize the correspondence between the LED failure modes and between the two main reason. We talked about a lot of the above LED failure is usually routine inspection and testing of the LED can not be found. In addition to electrostatic discharge, large current (caused by excessive junction temperature), the improper use of an external force, etc., many LED failure at high temperatures, low temperatures, rapid changes in temperature or other adverse conditions, since the LED chip, an epoxy resin, stent The difference in the lead, solid crystal plastic, PPA cup thermal expansion coefficient, etc., causing different internal stresses generated, therefore, quality testing LED is a very complex task. Furthermore, the GaN-based LED, the electrostatic discharge is the biggest cause of its failure. LED failure due to electrostatic discharge mechanism is very complex, equipment, tools, utensils and human are possible with static electricity and its discharge, the electrostatic ranging from several hundred volts, the high, the tens of thousands of volts, the discharge time at the nanosecond level . We display production, installation, use process appears blue-green tube failure is often the LED-PN junction breakdown by electrostatic discharge actions. International Association of strict requirements of the standard static electrostatic discharge mode, the body is divided into the discharge mode (HBM) and machine discharge mode (MM). Our ESD sensitivity of the device (ESDS) is divided into three levels (Human Body Model): one is 0 ~ 1999V; two for the 2000 ~ 3999V; three is above 4000V. Under normal circumstances between LED electrostatic discharge sensitivity mode in the human body in hundreds of volts - thousands of volts, while in the machine mode only tens of volts to about five hundred volts. LED display due to the production process complicated, hard to detect electrostatic discharge, therefore, LED electrostatic discharge sensitivity should select two or more for the proper (Human Body Model), and electrostatic protection must run through the entire production process. Four factors, the impact of Heze Juye life LED display life are internal and external factors, internal factors such as a peripheral component performance, the performance of LED devices, products, anti-fatigue properties; internal working environment with LED display and so on. 1. In addition to the influence of peripheral components LED devices, LED display also uses many other peripheral components, including circuit boards, plastic casing, power supply, connectors, chassis and other problems with any one component, may lead to reduced life of the display. Therefore, the display of the longest life is a key part of life that most short-lived decision. For example, LED, switching power supply, the metal casing according to 8-year standard choice of materials, process performance and protection circuit board can support its work for three years, three years later because of corrosion damage can occur, then we can only get a piece of 3 years life of the display. 2, LED light emitting device performance of LED devices is the display of the most critical and most relevant parts and life. For LED, mainly the following indicators: attenuation characteristics, water vapor permeability, UV resistance. If the LED display manufacturer LED device performance indicators for the assessment, but off on the application to the display, it will cause a lot of quality accident, seriously affecting the life of the LED display. 3. The product of fatigue properties of LED display products how fatigue performance, depending on the production process. Poor treatment process to produce three anti-fatigue properties of the module is difficult to guarantee, in the temperature and humidity changes, the board will protect the surface cracks, causing performance degradation protection. So the production process LED display key factor in determining the life of the display. Display production involved in the production process are: Component storage and pretreatment process furnace welding process, three anti-treatment process, sealing processes. The effectiveness of the process and materials selection and matching, parameter control and quality-related operator, for the vast LED display manufacturers, the experience is very important, a factory has many years of experience in the production process of the control will be more effective . 4. Impact of the working environment due to the use of different display operating conditions vary. In terms of the environment, indoor temperature difference is small, no snow and UV effect; outdoor temperature difference of up to 70 degrees, plus wind and rain. Harsh environment will exacerbate the aging of the display, the work environment is an important factor affecting the life of the display. Heze Juye LED display life is determined by many factors, but end of life by a number of factors that can be constantly continued life through the replacement of parts (such as switching power supply). The LED is not possible to replace the large quantities, and therefore, once the LED end of life, it means that the termination of the life of the display. In a sense the LED life determines life of the display. LED luminous intensity of life generally declines to 50% of the initial value of the time period to life. LED as a semiconductor material, it is often said that there are 100,000 hours life, but that is evaluated under ideal conditions. While in actual use it is unattainable. We have a simple way to experiment and calculation formulas can measure LED lifetime: the LED placed under the same conditions as the actual work environment to work 1000 hours, and the measured intensity of the initial value and the final value, and can be launched by the formula LED's lifetime. We selected the name of a brand of blue pipe at an ambient temperature of 50 ℃, current of 20mA after working 1,000 hours in an environment determined the final value of 0.88 × initial value, according to the formula we can calculate the blue tube in the environment of life to 5422 hours. We say that the life of the LED display life decisions, but not to say that life is equal to LED display life. Since the screen is not at work each LED work at full capacity all the time, the display in the case of normal play video programming, life of the display period should be 6 to 10 times the life of the LED, when LED Working at a small current life situation can be longer. Therefore, the choice of the brand of LED display life up to 50,000 hours. How to make a longer LED lifetime? Under normal circumstances we can proceed from the device fabrication and device applications in two ways. From the manufacture of the device in terms of: select high-quality epitaxial material; increase the chip area, reducing the current density; equilibrium current density; reduce the thermal resistance; select the excellent performance and strong UV resistance of the packaging materials and so can make LED long life . Speaking from the application of the device: the heat from the module design as to the implementation of the project or even a future system maintenance center; reduce LED operating current; configured correctly LED, so that each color LED attenuation are synchronous can extend LED life. Some manufacturers do not observe, in general, white marking ink replacement LED backlit dedicated ink, plus the equivalent of a hard layer of paint, the heat sealed. After many failures, there are vendors to accept new ideas and processes, focusing on the overall cooling solution. Aluminum plate type heat switch LED white backlight special ink coating, if you specify the use of yellow ink backlight will enhance the reflectivity to 91%. Soft ceramic heat spray paint between the copper substrate and an aluminum plate, can reduce the use of Japanese film of thermal conductivity at a very low cost to improve the resistance to breakdown voltage. LED lights are steady, the quality is good or bad with the heat lamp body itself is vital, currently on the market full-color high-brightness LED cooling, usually natural cooling, the effect is not ideal. Heat do not ideal, the life of the lamp itself also affected. The application of heat sink material industry should not only focus on the radiation coefficient, while ignoring the thermal resistance. If you see only some heat patch, thermal paste, thermal coefficient of heat or thermal paint film is very good, you think you can put out a high thermal conductivity, you may be disappointed. So the expected temperature drop will not light failure due to overheating, lamp life can be effectively extended, case acceptance smooth clearance, and may not occur. From the base line etched tin coating LED display Large backlit ink, the protective film into the oven baking, leveling entire board, stick thermal film, then glue or adhesive locks will combine thermal module, in this a tedious process can be found: with better thermal conductivity of the material, will be defeated thermal impedance. Air, no adhesion junction pores, heat pads, thermal grease silicone powder form of the volatiles, the thickness of the multilayer film of thermal conductivity, thermal resistance will be formed. These multi-level resistance will prevent heat conduction rate of heat transfer is very slow, even less than the lamp surface conduction into the heat accumulating increase. White backlight ink aluminum substrate surface not only to reflection, but also can lower the heat dissipated by the backlight of the ink surface. To protect the LED display or lighting from climate erosion, the heat conduction out effective, economical and effective way is to spray cooling soft ceramic paint. Only starting from the overall cooling concept to reduce the thermal resistance of interference, large LED lamps is critical to acceptance of. Lamps protective housing should abandon the traditional plating or paint, both engineering methods will heat seal back to the luminaire outdoor LED display long-term exposure to the natural environment, the occasion when the outdoor temperature, LED display cooling becomes an important issue , LED display LED display cooling indirect impact on the life, or worse still, directly affect the LED display screen body normal use and safety. Fifth, energy consumption and energy efficiency LED light efficiency, reduce energy consumption display LED display technology is an important direction of development, it has the positive significance: First, energy conservation, emission reduction, protection of the environment; the second is to reduce the power capacity, input power equipment and cooling equipment; third is to save electricity to reduce operating costs; four is to reduce the temperature display; five delay LED decay rate; six is ??to improve system reliability; seven is to extend the display life; eight is to reduce display optical parameters of drift screen, image stabilization effect. LED luminous efficiency (that is, external quantum efficiency) is within the LED quantum efficiency and the escape rate decision. Today, LED internal quantum efficiency is as high as 90%, but due to the escape rate is low, and therefore enhance the external quantum efficiency of LED light effect become a bottleneck. In order to break the bottleneck restricting the development of the industry, many innovative solutions have been proposed, but the theory has been verified, most of which have entered the test phase, and some have been successful, and has laid a solid foundation for the eventual industrialization. LED as a green energy source by people of all ages, will also as a mainstream media, led display technology of the future. In short, device manufacturers and device application itself is a complementary unity, progress device technology to bring prosperity to the application market, while demand applications market is the eternal power device technology advances. Let's upstream and downstream enterprises to work together, to create a new LED display technology of the future. If you do not understand the full color led display products, I do not know how to select the model, please contact our professional sales staff, said at the relevant information you need to install the full color led display, we will recommend the most for your dedication Best production design, selecting the type of LED displays, providing the highest quality products, in order to allow you to buy the economy, and must be assured! Ji Ning Shengjia led display professional production companies. Supply plug-outdoor full color led display full screen modules. P4, P5, P6, P7.62, P10, P16 and other models factory direct, nationwide delivery, installation, on-site service. Economic 宁圣佳 Optical in June 20, 2006 was established in the economic Ning Jiaxiang, the main LED optoelectronics industry, under the leadership of a professional team to extraordinary rate of growth, in order to meet market demand, the company is headquartered in November 2011 Ji Ning Jiaxiang move to high-tech development zone. The company has high-quality R & D team, advanced production equipment and a stable customer base and marketing high-quality network, now has 10 automatic production lines, more than 300 employees. Jining professional led display manufacturers to provide for the various types of bus parties led display: the design of indoor and outdoor color alone, and train full-color led display models. Single color led display year warranty. Full color led display two-year warranty. Nationwide delivery, installation and after-sales service. Providing meet the normal spare parts. Welcome customers to call us.