Analysis of purchasing problems of full-color LED large screen

What is the relationship between the brightness and viewing angle of a full-color LED large screen? The brightness of the full-color LED large screen is determined by the number of LEDs. Each full-color LED large screen is composed of hundreds of thousands or even millions of LED lamp beads. The power of each LED lamp bead is different. The indoor full-color LED large screen Screen and outdoor full-color LED large screen due to the greater difference in environmental requirements, and in order to have a longer life for full-color LED large screens, each full-color LED large screen manufacturer will reduce the current of the IC to reduce the workload to prolong the life of the full-color LED large screen. The life of the LED large screen. So will the angle affect the brightness of the full-color LED large screen? The answer is yes, just like a flashlight at home, the more concentrated the light, the higher the brightness, and the more astigmatism, the lower the brightness. The advantage of astigmatism is the viewing angle will increase, so the viewing angle and brightness of the full-color LED large screen are contradictory. The brightness of the outdoor full-color LED large screen must be greater than 4500CD to meet the outdoor conditions, and the brightness of the indoor full-color LED large screen usually reaches 800CD.

What determines the clarity of a full-color LED large screen? Everyone knows that the higher the pixels of computers and mobile phones, the higher the definition. The same is true for full-color LED large screens. So what specifications should be selected for full-color LED large screens to meet the requirements of use? This is different from the area of ​​full-color LED large screens. and the ratio of length to width. Usually, the larger the area of ​​the full-color LED large screen, the higher the definition, and it also has a lot to do with the ratio of the width and height of the full-color LED large screen, which is also inseparable from the ratio of the video source being played. What is the ideal ratio of the full-color LED large screen? Currently, the ratio of 16:9 is relatively large. In the past, the ratio of 4:3 was the main one. The actual ratio of the full-color LED large screen should also be combined with the proportion of the building. Therefore A ratio close to 16:9 is best. Monochrome subtitles and full-color LED large screens do not need to consider the problem of proportion. They mainly display text, and each text will not be compressed, so there will be no factors of text distortion.

What factors determine the life of a full-color LED large screen? The full-color LED large screen is composed of many components, such as LED modules, LED power supplies, power distribution cabinets, various connecting wires and so on. The led module is one of the most complicated components. The components of the led module include led lamp beads, driver chips, resistors, capacitors, circuit boards, and various connectors. The most prone to failure parts are led lamp beads, led lights Beads are the most precise devices. The light-emitting chip, the core material of the LED lamp post, is the biggest test of whether it can withstand long-term use and anti-attenuation. Secondly, the LED lamp bead package needs to be introduced into each lamp pin by a wire. The industry term is referred to as solid crystal bonding wire. , and the heat dissipation capacity of the PC material of the lamp bead will be the test of the anti-oxidation and anti-ultraviolet harsh climate of the led lamp bead. The driver chip is also very important. The driver chip is equivalent to the human brain. It needs to operate in a high-intensity and high-temperature environment for a long time. High temperature is one of the biggest influencing factors for the driver chip. Therefore, heat dissipation and cooling of the full-color LED large screen are also very important.

The LED power supply is one of the necessities of all electrical appliances. The voltage and current required to directly convert the AC 220 volts to DC. The stable current has a great impact on the life of the full-color LED large screen. In the past, the constant voltage power supply was used, but now it is basically changed to The constant current power supply and LED power supply are also very intensive. Due to long-term high-temperature operation, heat dissipation is also very important. The materials that are most likely to fail in LED power supplies are capacitors and triodes. Good materials determine the performance of LED power supplies. The power distribution cabinet also has a great influence on the work of the full-color LED large screen. The power distribution cabinet distributes the 380-volt high-voltage power supply to the large LED screen reasonably and evenly, including short-circuit protection, electric shock protection, voltage stabilization protection, etc. Factors, like the brakes of a car, cut off the power supply of the full-color LED large screen when needed, making it a safe range. All kinds of connecting wires look inconspicuous, but they are also the core components of full-color LED large screens. The price difference between cheap and expensive wires on the market is N times. The national standard is pure copper wire. Some full-color LED large screen manufacturers want to reduce costs. Copper-clad aluminum, aluminum-magnesium wire and other poor wires are used, resulting in the aging of the full-color LED large screen in less than a year, which brings a lot of cost to the maintenance of the full-color LED large screen. If aging occurs now, it needs to be purchased. New pure copper wires also need to invest in labor costs and time costs, so it is recommended that all full-color LED large screen manufacturers purchase pure copper national standard wires from regular channels.

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