What technologies determine the quality of LED displays？

　　LED display screen as a kind of green energy-saving light source, get the favour of people, will serve as a mainstream media, LED LED display technology for the future of the LED display device manufacturing and device applications is a unity of a complementary device technology bring prosperity to the application market, application and market demand is the eternal power of technological progress LED display device. Only LED display of the upstream and downstream enterprise joint efforts, to create a new LED display technology development prospects So what are the technology for the quality of LED display has a decisive role?

　　1. Brightness and perspective

　　The brightness of the LED display depends on the intensity of the LED and the density of the LED.In recent years, LED display in the substrate, epitaxy, chip and packaging and other aspects of the new technology such as bamboo shoots after a spring spring to develop, especially indium tin oxide (ITO) current expansion layer technology and process stability and maturity, so that the LED luminous intensity has been greatly improved.At present, under the condition that the horizontal Angle of view is 110 degrees and the vertical Angle of view is 50 degrees, the light intensity of the green tube can reach up to 4000MCD, the red tube can reach 1500MCD and the blue tube can reach 1000MCD.When the pixel spacing is 20mm, the brightness of LED electronic display can reach more than 10000nit.This allows the LED display to operate 24 hours.

　　2. Uniformity and clarity

　　The uniformity of LED display is the most important indicator to measure the merits and demerits of LED display screen.LED display in the production and installation process assembly accuracy is insufficient;So, how do LED display manufacturers solve the problem of inconsistent performance parameters of LED display?At present, there are two main technical approaches in the industry: one is to improve the consistency of the performance of LED display by further subdividing the specifications of LED display parameters;The second is to improve the uniformity of LED electronic display by means of follow-up correction. The follow-up correction has also evolved from the early module correction module correction to point-by-point correction. The correction technology has also evolved from the simple light intensity correction to the light intensity color coordinate correction.

　　3. LED display pixel control

　　LED display pixel control caused by many reasons, the most important reason is the LED failure of the main cause of LED failure can be divided into two aspects: one is the LED display itself is not good quality;Second, the improper usage In addition to the effects of electrostatic discharge large current (junction temperature is too high) caused by the improper use of such as external force, a lot of LED failure is in high temperature and low temperature or other harsh conditions of rapid change, due to the LED chips stent lead solid epoxy resin glue PPA cup body materials such as thermal expansion coefficient difference, caused by the internal stress of different As a result, the quality of the LED display detection is meticulous and complicated work.

　　4. Life

　　The factors affecting the life of LED display are divided into internal and external causes. Internal causes have the performance of peripheral components, the performance of LED light-emitting devices, the anti-fatigue performance of products;And the internal cause and LED display of the working environment.

　　Peripheral parts: besides LED devices, LED electronic display also use many other peripheral components, including connectors switch power supply circuit board plastic shell casing, etc., of any part of a problem, can reduce the service life of LED electronic display screen So, LED electronic display screen, the longest life expectancy is decided by the key components of the short-lived life;

　　Influence of LED light-emitting devices performance :LED light-emitting devices are the most critical and life-related components of LED electronic display. For LED, the main indicators are as follows: Attenuation characteristics, Anti-water vapor permeability characteristics, Anti-ultraviolet performance;

　　Influence of LED light-emitting devices performance :LED light-emitting devices are the most critical and life-related components of LED electronic display. For LED, the main indicators are as follows: Attenuation characteristics, Anti-water vapor permeability characteristics, Anti-ultraviolet performance;

　　Effects on the fatigue properties of the LED products: LED display products of anti-fatigue performance depends on the production technology of LED display So the LED display production process is to determine the key factors of LED display life LED display production is involved in the production process are: furnace welding process three components of storage and pretreatment process waterproof sealing process, etc;

　　Effects on the fatigue properties of the LED products: LED display products of anti-fatigue performance depends on the production technology of LED display So the LED display production process is to determine the key factors of LED display life LED display production is involved in the production process are: furnace welding process three components of storage and pretreatment process waterproof sealing process, etc.

　　A good quality LED display is the integration of many aspects, that is, every technical details and materials need special attention to have a high quality LED display not only needs the high level of technology of LED display manufacturers, but also needs the careful maintenance of users.

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