Optimization of a multi-view system based on pulsed LED-LCD projectors

Abstract

In recent years, huge advancements in stereoscopic displays and 3D projection technologies have been accomplished, mainly driven by the rapidly increasing dissemination of 3D technologies at cinemas and in consumer products. Virtual Reality systems built from these products, enhanced by head tracking are able to produce a perspective-correct view, but for a single user only. Other viewers share the same image from a different position and thus see a more or less distorted image, while actually a perspective-correct stereoscopic views for multiple, individually tracked users on a would be necessary. We present multi-view stereo display based on pulsed LED light sources of a set of multiple LCD projectors which is strongly optimized towards high brightness and minimum crosstalk. Pulsed LED projectors allow high frequency switching between the displayed images, almost eliminating a major source of crosstalk between the individual views. We evaluated the power consumption, projection brightness and crosstalk of our multi-view system and present a solution which alleviates the inherent problems of shutter-based multi-view systems, which are low energy efficiency, brightness degradation due to the projector shutter, and relatively high crosstalk, which, moreover, increases with the number of views.