Koji su učinci LED svjetiljki na LED zaslone zaslona?

Kao što je poznato, LED svjetiljke su svjetlosne diode, widely used in various production fields such as lighting fixtures, LED large screen displays, traffic lights, decoration, computers, electronic toys and gifts, switches, telephones, advertising, urban lighting projects, itd.
LED beads are the most widely used and widely produced component in LED electronic display screens. The quality of LED electronic display screens is mainly influenced by LED beads. Today, we will introduce why LED beads are the most critical component of LED electronic display screens and how to distinguish the quality of LED beads?
What are the effects of LED beads on LED display screens?
The most critical component of a full-color LED electronic display screen is the LED beads. There are three reasons:
Firstly, the most commonly used key components in LED full-color screens are several thousand to tens of thousands of LED beads per square meter;
Secondly, LED beads determine the main optical display performance of the entire screen, directly affecting the audience’s evaluation of the display screen;
Thirdly, LED electronic display screens account for the largest proportion of the overall cost, ranging from 30% do 70%.

How to distinguish the quality of LED electronic display beads.
1、 Look at the solder joints. The LED beads produced by legitimate LED bead manufacturers are produced using SMT surface mount technology, solder paste, and reflow soldering processes
2、 Check the quality of FPC. FPC is divided into two types: copper plated and rolled copper. The copper foil of the copper plated layer is protruding, which can be seen from the connection between the solder pad and FPC when viewed closely
3、 Check the cleanliness of the surface of the LED beads. If SMT technology is used to produce LED chips, the surface cleanliness is very good, and no impurities or stains can be seen.
4、 When it comes to the chips and production processes used in LED lights, it is difficult to tell the difference with the naked eye. Aging equipment and testing equipment should be used. If you put several manufacturers’ LEDs on an aging tester and age them with high current for 24 hours or more, then measure the brightness of several manufacturers’ LEDs and see which LED has the smallest attenuation in light intensity. The one with the smallest attenuation has the best quality.

1 perspective.
The viewing angle of an LED electronic display screen is determined by the viewing angle of the LED beads. Trenutno, most outdoor electronic display screens use a horizontal viewing angle of 120 °; Vertical viewing angle of 50 °; The elliptical LED indoor electronic display screen adopts a horizontal and vertical angle of 120 °; Electronic display screens on highways are generally selected at a 30 ° angle due to their unique characteristics; A circular LED with a viewing angle is sufficient, as some electronic displays on high-rise buildings require a higher vertical viewing angle. Perspective and brightness are contradictory to each other, and a large perspective will definitely reduce brightness. The choice of perspective needs to be determined based on the specific purpose.
2 Svjetlina.
LED brightness is an important determinant of the brightness of electronic display screens. The higher the brightness of the LED, the greater the margin of current usage, which is beneficial for saving power consumption and maintaining LED stability. LEDs have different angle values. When the chip brightness is set, the smaller the angle, the brighter the LED, but the smaller the viewing angle of the display screen. Generally, a 120 degree LED should be selected to ensure sufficient viewing angle for the display screen. A balance should be found between brightness, angle, and price for electronic display screens with different point spacing and line of sight.
3 Failure rate.
Due to the fact that full-color electronic display screens are composed of tens of thousands or even hundreds of thousands of pixel points composed of red, zelena, and blue LEDs, the failure of any color LED will affect the overall visual effect of the electronic display screen. Generally speaking, based on industry experience, the failure rate of LED electronic displays from assembly to aging for 72 hours before shipment should not exceed 0.03% (referring to failures caused by LED beads themselves)
4. Anti static ability.
LED semiconductor devices are sensitive to static electricity and are prone to static failure, so their anti-static ability is crucial for the lifespan of display screens. Generally speaking, the failure voltage of LED human body electrostatic mode test should not be lower than 2000V
5 Lifespan.
The theoretical lifespan of LED beads is 100000 sati, which is much longer than the working lifespan of other components in LED electronic displays. Therefore, as long as the quality of LED beads is guaranteed, the working current is appropriate, the PCB heat dissipation design is reasonable, and the electronic display production process is rigorous, LED beads will be one of the most durable components in the entire display machine.
6 Attenuation characteristics.
After long-term operation, LED electronic displays may experience a decrease in brightness and inconsistent display colors, mainly due to the attenuation of LED device brightness, which can cause a decrease in the overall brightness of the display screen.
The attenuation characteristics are not only related to the inherent characteristics of red, zelena, and blue LEDs, but also affected by factors such as current usage, PCB board heat dissipation design, and display screen operating environment temperature.
7 sizes.
The size of LED beads affects the pixel distance, i.e. razlučivost, of LED electronic display screens. The 3535 patch LED is mainly used for P10/P8/P6 indoor display screens, while the 2121 patch LED is mainly used for indoor display screens such as P2/P2.5/P3. On the premise of unchanged dot spacing, increasing the size of LED beads can increase the display area and reduce graininess, but due to the decrease in black area, it will reduce contrast; On the contrary, the reduction in LED size reduces the display area, increases the graininess, enlarges the black area, and increases the contrast.