Laser Scan Pico-Projector with MEMS Scanning Mirror

摘要

In this article, we introduce the three primary pico-projector technologies and focus on discussing the working principle and features of laser scan projection display with MEMS scanning mirror. The MEMS scanning mirror scans RGB laser beams aligned into a single spot into a two-dimensional image area to form an image. Each pixel color is formed by modulating the RGB lasers simultaneously that leads to high optical efficiency, lower power consumption, wide color gamut and focus free operation. The geometrical distortion and brightness uniformity due to laser incident angle and sinusoidal motion of the scanning mirror may be compensated and corrected through firmware computation without additional optical components. Therefore, the light engine requires the least components and is inherently small and low cost, and is best suited for embedded projection application.