Analysis about the Relationship between LED Visual Angle and Luminance and the Influence of Which on LED Display Luminance Uniformity

Among the factors which effect LED display panel uniformity, luminance uniformity is the key one. The characteristic of LED shows that its luminance is the strangest along the optical axis direction, and around it, the luminance is weakened. So the luminance of LED display panel is strangest along the normal direction, when the deviation from the normal direction, brightness will be reduced at different levels. Because of the LED manufacturing process and performance parameters, there are some mosaics of uneven brightness in the LED display panel. In this paper, to get the relations between LED luminance and visual angle, we take the LED single-tube and LED display module as the object to study. In-depth analysis the reasons which impact the LED display brightnessuniformity, then, gave some advice to the collection method of LED luminance data and some problem which need to pay attention to in the product processes.