Four important indicators of LED lamp bead product quality

For full-color LED display screen, LED lamp bead is its key component. The quality of LED lamp bead plays an important role in determining the quality of LED display screen. First of all, LED lamp beads are used in a large number of full-color LED displays, and there may be thousands or even tens of thousands of LED lamp beads per square meter. After that, the LED lamp bead directly determines the display performance of the full-color LED display screen and the saturation and clarity of the color. The important indicators of LED lamp bead quality mainly include: first, the brightness of full-color LED display screen the brightness of LED lamp bead determines the brightness of full-color LED display screen. The higher the brightness of LED lamp bead, the greater the margin of current used, it is good for saving power consumption and keeping LED lamp beads stable. LED lamp beads have different angle values. When the brightness of the chip is set, the smaller the angle, the brighter the LED, but the smaller the angle of the display screen. Generally, 100 degrees should be selected- The 110-degree LED lamp bead ensures sufficient viewing angle for the full-color LED display. Two, full-color LED display failure rate LED display is by tens of thousands of even a few 100,000 group of red, green, blue three LED lamp beads composition. The failure rate of the lamp bead will not be higher than one in ten thousand even if it is aged for 72 hours. 3. Attenuation characteristics of full-color LED Display LED lamp beads will gradually attenuate with the increase of usage time. The attenuation speed of LED lamp bead brightness is related to LED chip, auxiliary materials and packaging process. Generally speaking, after the 1000-hour and 20 mA-hour normal temperature lighting test, the attenuation of red LED lamp beads should be less than 7, and that of blue and green LED lamp beads should be less than 10. The consistency of red, green and blue attenuation has a great influence on the white balance of the full-color LED display screen in the future, thus affecting the display fidelity of the display screen. Four, LED display anti-static ability, because LED lamp beads are semiconductor devices, sensitive to static electricity, easy to cause static failure, so anti-static ability is crucial to the life of LED display. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED lamp bead should not be lower than 2000 V.