Talking about the light distribution curve of LED full color display

The so-called LED screen light distribution curve refers to the spatial distribution of luminous intensity. Among the encapsulated LED full-color display parameters, the most important one is the spectral distribution and spatial distribution of luminous intensity. Only the spectral distribution of the luminous intensity with high degree of accuracy can be used to derive the parameters of the color metric with small uncertainty. The measurement quality of the spatial distribution of the luminous intensity (light distribution curve) not only directly affects the measurement accuracy of the total luminous flux of the LED, but also the luminous efficiency obtained, and can also feedback the performance of other aspects of the LED. Therefore, understanding the light distribution curve of the LED full color display is very important for the LED technician.

The light distribution curve usually shows three ways: one is the polar coordinate method, the other is the Cartesian coordinate method, and the third is the light intensity curve. Different illuminating viewpoints have different light distribution curves. Current LED illumination viewpoints are 15°, 30°, 60°, 90°, 120°, 170°. The following describes the classification of the light distribution curve of the LED screen.
1. Rectangular LED full color display light distribution curve: The luminous intensity is very low, so it is mainly used as an indicator light on electrical appliances or appearance. The distance between the green LEDs is 45°, so the light distribution curve on a total of 8 sections. Although their shapes are quite different, it is 2.6mcd, but their shape of the light distribution curve near the normal direction is the same. As shown below.

2, oval LED full color display: the primary for the display. Since the viewing angle of the display screen is large and the left and right are small, so as to be suitable for everyone's visual characteristics, the long-axis field of view of the elliptical LED full-color display screen is large, and the short-axis field of view angle is small. As shown below.

The light distribution curve of the above LED screen is mainly for the LED full color display screen, and the light distribution curves of the traffic light LED and the monochromatic light LED all need the understanding of the LED technician.

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