Consistency of LED device parameters

　　Consistency

　　① Brightness consistency

　　The brightness consistency of LED full color displays depends on the brightness consistency of LED devices. Generally, it is required that the maximum and minimum brightness ratio of each color of LED devices should not exceed 1.3, and then follow the scientific PCB lamp insertion method to ensure that the brightness difference between adjacent two LEDs of the same color is less than 10%

　　② Chromaticity consistency

　　The LED devices that make up the full color LED display screen all require a certain wavelength range. If the wavelength range is too wide, it will affect the consistency of the color of the display screen. Generally speaking, the wavelength range of each color, red, green, and blue, is required to be within 5nm.

　　③ Angular consistency

　　LED full color display screens are composed of angled LED devices, and the consistency of LED device angles can seriously affect the brightness and chromaticity consistency of the display screens at different angles. The consistency of the red, green, and blue brightness curves of LED devices (especially elliptical lights) with varying viewing angles also seriously affects the consistency of brightness and chromaticity at different angles of the display screen. Among all the parameters of the full color display screen, this parameter is the most difficult to achieve indicator. The main difference between high-end LED full color displays lies in this.

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