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Jul 20,2021| LED Knowledge
With the continuous maturity of LED display technology, the cost of LED display has plunged, and the cost of LED full-color display has also fallen sharply. Now there are many low-quality products on the market because of the quality of LED full-color display. Especially important. So, do you know from which aspects to judge the quality of the P2 full-color LED display? Let's get to know it together!
1. Failure rate
Since the full-color LED display is composed of tens of thousands or even hundreds of thousands of groups of red, green, and blue LEDs, the failure of any color LED will affect the overall visual effect of the full-color screen. Generally speaking, according to industry experience, the failure rate from the start of assembly of the LED display screen to 72 hours before aging should be no more than three ten thousandths.
2. Antistatic ability
LED is a semiconductor device, which is sensitive to static electricity and can easily cause static failure. Therefore, the antistatic ability is very important to the life of the LED full-color screen. Generally speaking, the failure voltage of the human body electrostatic mode test of the LED should not be lower than 2000V.
LED brightness is an important determinant of the brightness of LED full-color screens. The higher the brightness of the LED, the greater the margin for the use of current, which is good for saving power 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 viewing angle of the full-color screen is smaller. Generally, a 100-degree LED display should be selected to ensure that the full-color display has sufficient viewing angle. For LED full-color displays with different dot pitches and different viewing distances, a balance should be found in brightness, angle, and price.
4. Attenuation characteristics
The red, green, and blue LEDs all have the characteristics of brightness attenuation as the working time increases. The quality of LED chips, the quality of auxiliary materials, and the level of packaging technology determine the attenuation speed of the LED. Generally speaking, after 1000 hours, 20 mA normal temperature lighting test, the attenuation of the red LED should be less than 10%, and the attenuation of the blue and green LEDs should be less than 15%. The uniformity of red, green, and blue attenuation has a great impact on the white balance of the full-color LED display in the future, which in turn affects the display fidelity of the LED display.
The LED full-color display is composed of countless red, green, and blue LEDs. The brightness and wavelength consistency of each color LED determines the brightness consistency, white balance consistency, and color consistency of the entire display screen. Degree consistency. Generally speaking, LED display manufacturers require device suppliers to provide LEDs with a wavelength range of 5nm and a brightness range of 1:1.3. These indicators can be achieved by the device supplier through a spectrophotometer. The consistency of voltage is generally not required. P2 full-color LED display screen price P2.0 high-definition display specifications.
After understanding the judgment criteria, customers can use these criteria to measure the quality of the purchased P2 full-color LED display.