What are the common performance indicators of LED displays?

LED display is currently commonly used outdoor and indoor large-screen display, how to choose a high-performance LED display, LED lamp beads are the key core parts that affect its display effect. In the packaging process, high-precision equipment is required to create a high-performance LED display product.

1.Antistatic ability 

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

2.Attenuation characteristics 

Generally, LED displays need to work for a long time, and long-term work will lead to a decrease in brightness and inconsistent color of the display, which is caused by the brightness attenuation of LED devices. The attenuation of LED brightness causes the brightness of the entire LED display screen to decrease. The inconsistent brightness attenuation amplitude of red, blue and green LEDs leads to the inconsistent color of the LED display, that is, the phenomenon of the display screen. A high-quality LED display can well control the height attenuation amplitude and adjust its brightness.

3.Brightness 

The brightness of the LED display beads is a key factor in determining the height of the display. The higher the height of the LED, the greater the residual force for using the current, which is beneficial to saving power consumption and maintaining the stability of the LED. LED angles are different, if the chip has been set, the smaller the angle, the brighter the LED, if the angle of view of the display is small, it is necessary to choose 100 degrees of LED to ensure that the LED display has enough viewing angle. LED displays with different point spacing and no sight distance should be considered in brightness, angle and price to find a balance.

4.Perspective 

The angle of the LED lamp beads determines the angle of view of the LED display. At present, most of the outdoor LED displays use oval 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 vertical SMD LED lamp beads of 120 degrees. For example, the LED display on the highway uses a circular LED with a 30-degree viewing angle. The LED display of high-rise buildings has higher requirements for vertical viewing angles, and large viewing angles reduce brightness. Therefore, the choice of perspective 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, and 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 made up 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 angular directionality, that is, when viewed at different angles, its brightness will increase or decrease, the angle consistency of red, green and blue LED will seriously affect the consistency of white balance at different angles, affect the color fidelity of LED display video, so that the red, green and blue LED at different angles of the brightness of the change matching consistency, to the packaging lens design, the selection of raw materials for scientific design, 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 at different angles is not optimistic.

7.Life 

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

8.Size 

The size of the LED device is also related and important, which directly affects the pixel distance of the LED display, that is, the resolution. Generally, 5mm elliptical lights are used for outdoor displays above P16, and 3mm elliptical lights are used for dry P12.5, P12, and P10 outdoor displays. Under the condition that the segment spacing remains the same, the size of the LED device increases, the display area can be increased, and the granularity can be reduced.