Currently, incandescent bulbs are still the primary light source for motorcycle brake lights, which suffer from drawbacks such as easy damage, high power consumption, short lifespan, and poor reliability. LED light sources, on the other hand, are increasingly being used in vehicle lights due to their advantages of small size, long lifespan, and low energy consumption. There are three main existing mainstream LED motorcycle signal light light distribution designs: First, multiple piranha-shaped LEDs are arranged in a planar shape and sealed inside the lamp cover. The disadvantage is that a significant portion of the light falls outside the range required by national standard light distribution screens, resulting in wasted light energy. Second, multiple spherical LEDs are arranged in a planar shape and sealed inside the lamp cover, plus a light-distributing lens. The disadvantage is that some light is refracted, scattered, and absorbed by the light-distributing lens, resulting in lower luminous efficiency. Third, multiple piranha-shaped LEDs are arranged in a planar shape, and the light is distributed using a parabolic condenser and a light-distributing lens. The disadvantage is that the condenser design is costly, and the light-distributing lens results in significant light loss.
my country's motorcycle signal lights comply with the standard "Light Distribution Performance of Motorcycle Optical Signal Devices GB/T17510-1998," which requires that, on a light distribution screen with a distance determined by the inverse square law of photometry, the light intensity of test points distributed within an elliptical area of 20° horizontally and 10° vertically must be within a certain range. Addressing the problems of low luminous efficiency, large light energy loss, and high cost in existing designs, this research proposes a new light distribution design method based on a mathematical model of the light intensity distribution of a curved LED array. Its core feature is that it eliminates the need for a condenser and a light distribution lens.
