Uniform illumination design by configuration of LEDs and optimization of LED lens for large-scale color-mixing applications

摘要

In many applications, the emitting light from light-emitting diodes (LEDs) with different colors needs to be mixed together on a large-scale plane, and this illumination mode is usually generated with a diffuser. Abandoning the traditional methods, we proposed an LED color-mixing method that can produce both high color uniformity and irradiance uniformity illumination. This method is composed of two main aspects: arrangement of the irradiance array and design of the LED lens. With this method, an independent rectangular irradiance distribution is generated by each lens unit, and the large-scale color uniform illumination is obtained by arraying the irradiance distribution. A 3 × 3 array of LED module units consisting of 36 LED lens units with four different colors is designed, and a desired result with high color uniformity is obtained.