Software-based distortion compensation for a scanned beam display

Abstract

We developed a software-based approach to compensate for distortion in a scanned beam display (SBD) system. A scanned beam display has advantages of being small in device size, low in energy consumption, and capable of producing high-resolution and variable images. However, it suffers from two main problems: the non-uniform power spreading within a single light spot and the non-uniform light spot distribution in trajectory. While most work has been done to solve these problems from the hardware design perspective, we address these issues by minimizing the difference between input and output images on a software level. We also implemented our algorithm on Graphics Processing Unit (GPU) to achieve near real-time performance which is required by video display. Finally, the output light source control value is applied to a scanned beam display simulator, showing improved display images.