Five major elements of choosing LED display shared by high quality Monitor factory China.
1. The failure rate
Since the full-color display screen is composed of tens of thousands or even hundreds of thousands of pixels composed of red, green and blue leds, the failure of any color LED will affect the overall visual effect of the display screen. Generally speaking, according to industry experience, the failure rate of LED display should be no more than 3/10000 before the LED display starts to be assembled and aging 72 hours before shipment (refers to the failure caused by LED components themselves).
2. Anti-static capacity
LED is a semiconductor device, which is sensitive to static electricity and easy to cause static electricity failure. Therefore, the anti-static ability is very important for the life of the display screen. Generally speaking, the failure voltage of LED body electrostatic mode test should not be lower than 2000V.
3. Attenuation characteristic
Red, green and blue leds have the characteristics of brightness attenuation with the increase of working time. The quality of LED chip, the quality of auxiliary materials and the level of packaging technology determine the attenuation rate of LED Fashionable Touch Monitor. Generally speaking, the attenuation of red LED should be less than 10%, and that of blue and green LED should be less than 15% after lighting test at room temperature of 20 ma for 1000 hours. The consistency of attenuation of red, green and blue has a great influence on the white balance of full-color LED display screen in the future, which further affects the display fidelity of the display screen.
LED brightness is an important determinant of display brightness. The higher the LED brightness, the larger the allowance of using current, which is good for saving power consumption and keeping the LED stable. Leds have different Angle values. When the chip brightness is set, the smaller the Angle, the brighter the LED, but the smaller the viewing Angle of the display. Generally, 100 degree LED should be selected to ensure sufficient viewing Angle of the display screen. For screens with different distances and different line-of-sight, there should be a balance between brightness, Angle and price.
5. The consistency
The full-color display screen is composed of numerous red, green and blue LED pixels, and the brightness and wavelength consistency of each color LED OEM computer Monitor determines the brightness consistency, white balance consistency and chroma consistency of the entire display screen. Generally speaking, display manufacturers require device suppliers to provide 5nm wavelength range and 1:1.3 brightness range of leds, which can be graded by device suppliers through spectral separators. Voltage consistency is generally not required.