What are the common performance indicators of LED displays?

LED display screens are currently commonly used outdoor and indoor large-screen displays. How to choose a high-performance LED display screen? LED lamp beads are the key core parts that affect its display effect. In the packaging process, high-precision equipment is required to manufacture a high-performance LED display product. Here is a brief introduction to the performance of the LED display.

1、Antistatic ability

LED is a semiconductor device, which is sensitive to static electricity and can easily lead to static electricity failure, so antistatic ability is very important for the life of LED display. The failure voltage of LED human body electrostatic mode test should not be lower than 2000v。

2、Attenuation characteristics

Generally, LED display screens need to work for a long time, which will lead to a decrease in brightness and inconsistent colors of the display screen, which are all caused by the brightness attenuation of LED devices. The attenuation of LED brightness will cause the brightness of the entire LED display screen to decrease. The inconsistency of red, blue and green LED brightness attenuation will lead to inconsistent colors of the LED display, that is, the phenomenon of display screen blur. A high-quality LED display can well control the height attenuation range and adjust its brightness.

3、Brightness

The brightness of the lamp beads of the LED display is a key factor in determining the height of the display. The higher the height of the LED, the greater the capacity of the current, which is good for saving power consumption and maintaining the stability of the LED. The angles of the LEDs are different. If the chip has been fixed, the smaller the angle, the brighter the LED brightness. If the viewing angle of the display screen is small, it is necessary to choose a 100-degree LED to ensure a sufficient viewing angle for the LED display screen. For LED displays with different dot pitches and different viewing distances, it is necessary to consider the brightness, angle and price to find a balance.

4、Angle of view

The angle of the ILED lamp bead determines the viewing angle of the LED display. At present, most outdoor LED displays use elliptical SMD LED lamp beads with a horizontal viewing angle of 120 degrees and a vertical viewing angle of 70 degrees, and indoor LED displays use SMD LED lamp beads with a vertical viewing angle of 120 degrees. For example, the LED display on the highway uses a circular LED with a viewing angle of 30 degrees. The high-rise LED display has higher requirements on the vertical viewing angle, and the large viewing angle reduces the brightness. Therefore, the choice of viewing angle depends on the specific use.

5、Failure Rate

The full-color LED display is composed of tens of thousands or hundreds of thousands of pixels composed of red, green and blue LEDs. The failure of any color LED will lead to the overall visual effect of the LED display.

6、Consistency

The full-color LED display is composed of countless pixels composed of red, blue and green LEDs. The brightness and wavelength of each color LED play a decisive role in the brightness, white balance consistency, and brightness consistency of the LED display.LED is angled, so the full-color LED display also has angle direction, that is, when viewed at different angles, its brightness will increase or decrease, the angle consistency of red, green, and blue LEDs seriously affects the consistency of white balance at different angles, and affects the color fidelity of LED display video,to achieve the matching consistency of red, green and blue LED brightness changes at different angles, it is necessary to carry out scientific design in packaging lens design and raw material selection, which depends on the technical level of the supplier.When the angle consistency of the LED is not good, the white balance effect of the whole LED display screen at different angles is not optimistic.

7、Lifespan

The average lifespan of an LED display is 100,000 hours. As long as the quality of the LED device is good, the working current is appropriate, the heat dissipation design is reasonable, and the production process of the LED display is rigorous, the LED device is one of the most durable devices in the LED display. The price of LED components accounts for 70% of the price of LED displays, so the quality of LED displays can be determined by LED components.

8、Size

The size of the LED device is also relevant, and it directly affects the pixel distance of the LED display, that is, the resolution. Generally, 5mm oval lights are used for outdoor displays above p16, and 3mm oval lights are used for p12.5, p12, and p10 outdoor displays. Under the condition that the segment spacing remains unchanged, the size of the LED device increases, which can increase its display area and reduce graininess.