As the component with the highest cost and the largest amount of LED display, LED lamp beads play a leading role in the quality of LED display. Today we will introduce to you the influence of LED lamp beads on LED display.

1. Perspective

    The viewing angle of the LED display depends on the viewing angle of the LED lamp beads. At present, most outdoor display screens use elliptical LEDs with a horizontal viewing angle of 100°; and a vertical viewing angle of 50°; and indoor display screens use SMD LEDs with both horizontal and vertical angles of 120°. The display screen on the highway generally chooses 30° due to its particularity; the circular LED with the viewing angle is enough. Displays on some tall buildings require higher vertical viewing angles. The viewing angle and brightness are contradictory, and a large viewing angle will inevitably reduce the brightness.

2. Brightness

    LED brightness is an important determinant of display brightness. The higher the brightness of the LED lamp bead, the greater the margin of the current used, which is good for saving power consumption 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. For displays with different dot pitches and different viewing distances, a balance point should be found in brightness, angle and price.

3. Failure rate

     Since the full-color display is composed of tens of thousands or even hundreds of thousands of pixels composed of three types of red, green, and blue LEDs, the failure of any color LED will affect the overall visual effect of the display. Generally speaking, according to industry experience, the failure rate of LED display should not be higher than 3/10,000 (referring to the failure caused by the LED lamp bead itself) before the LED display starts to be assembled and aged for 72 hours before shipment.

4. Life

    The theoretical life of the LED device is 100,000 hours, which is much longer than the working life of other components of the LED display. Therefore, as long as the quality of the LED device is guaranteed, the working current is suitable, the PCB heat dissipation design is reasonable, and the display production process is rigorous, the LED device will be the entire display screen. One of the most durable parts in a machine.