A scrolling unit and a projection system using the same are provided. The scrolling unit is formed by spirally arranging on an outer circumferential surface of a column-like plate at least one lens cell which separates the incident light into a plurality of beams. As the scrolling unit rotates about...http://www.google.com.au/patents/US6997562?utm_source=gb-gplus-sharePatent US6997562 - Scrolling unit and projection system using the same
