Full-color Micro-LED micro projection engine high-efficiency beam combining device

The invention discloses a full-color Micro-LED micro projection engine high-efficiency beam combining device, which comprises a plurality of monochromatic Micro-LED screens and lenses in one-to-one correspondence with the monochromatic Micro-LED screens, and each lens reflects or transmits monochromatic light beams emitted by the corresponding monochromatic Micro-LED screen to the same direction for beam combination. The lens is a reflection type lens, a transmission type lens or a combined type lens formed by combining the reflection type lens and the transmission type lens up and down; the single-color Micro-LED screens corresponding to the reflection type lens and the transmission type lens are located below and above the lenses respectively. The problems that a traditional beam combining device is poor in design flexibility and insufficient in brightness are solved. The Micro-LEDs can be arranged in various modes for selection, and the number of the Micro-LEDs can be increased according to requirements, s