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As the most expensive and most used component of LED display, LED lamp beads play a leading role in the quality of LED display. Today we will introduce to you why LED lamp beads are the most critical component of LED display screens, and how to distinguish the advantages and disadvantages of LED lamp beads?

　　 The most critical component of a full-color LED display is LED lamp beads. There are three reasons:

　　First, LED is the most used key device in the full-color screen, and thousands to tens of thousands of LEDs will be used per square meter;

　　 Second, LED is the main body that determines the optical display performance of the entire screen, which directly affects the audience's evaluation of the display;

　　 Third, LED accounts for the largest proportion of the overall cost of the display, ranging from 30% to 70%.

　　How to distinguish the pros and cons of LED display beads?

　　 One, look at the solder joints. The LED strips produced by the regular LED strip manufacturers are produced by SMT chip technology, using solder paste and reflow soldering process.

　　 Second, look at the quality of FPC. FPC is divided into two types: copper and rolled copper. The copper foil of the copper-clad board is protruding. If you look closely, it can be seen from the connection between the pad and the FPC.

　　 Three, look at the cleanliness of the surface of the LED strip. If the LED light strip produced by SMT process is used, the cleanliness of the surface is very good, and there are no impurities and stains.

4. Looking at the chips and production process of LED lights, you can’t tell the difference with your eyes. You need to use aging equipment and testing equipment. If you put several manufacturers’ LEDs on the aging meter and use high current to aging for 24 hours or longer Over time, you can measure the brightness of LEDs from several manufacturers to see which LED luminous intensity attenuation is the smallest, and the quality with the smallest attenuation is the best.

　　What are the effects of LED lamp beads on the LED display

　　1, perspective

　　 The viewing angle of the LED display is determined by the viewing angle of the LED lamp beads. At present, most outdoor displays use elliptical LEDs with a horizontal viewing angle of 100°; and a vertical viewing angle of 50°; while indoor displays use SMD LEDs with a horizontal and vertical viewing angle of 120°. The display screen on the highway generally uses 30° because of its particularity; a round LED with a viewing angle is sufficient. Some high-rise display screens have higher requirements for vertical viewing angles. Viewing angle and brightness are contradictory to each other, and a large viewing angle will inevitably reduce brightness. The choice of perspective needs to be determined according to the specific purpose.

　　2, brightness

　　LED brightness is an important determinant of the brightness of the display. The higher the brightness of the LED, the greater the margin for the use of current, which is good for saving power and keeping the LED stable. LEDs have different angle values. When the brightness of the chip is fixed, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display. Generally, a 100-degree LED should be selected to ensure a sufficient viewing angle of the display screen. For displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle, and price.