Yong-Jing Wang

70.3: Novel Single Panel Projection Systems

A novel single panel projection system using angular color technique is proposed to increase the color efficiency and to reduce the cost of projection systems. This system uses a single panel to display RGB information in spatially separated color zones. Special projection optics is utilized to merge the RGB pictures into a full color picture on the projection screen. The advantages are: 1) it has almost 100% color efficiency comparing with less than 33% efficiency in other sequential color systems, 2) the light engine is very compact and the cost is very low comparing with a traditional three panel systems. This light engine structure is compatible with traditional projection lamps, LEDs, and laser light sources. It is applicable to most of the microdisplay panel technologies including HTPS-LCDs, LCOS, and DLP. A projector with HTPS-LCD and Ujoy lamp was developed. This technology is very promising for ultra-compact min projectors.

P-177: LED Projectors Based on Angular Color Method

A novel LED micro projector based on the angular color technique is proposed. This system uses a single panel to display RGB information in spatially separated color zones. Special projection optics is utilized to merge the RGB pictures into a full color picture on the projection screen. Two separate LED sources are considered: 1) White LED with color splitting prism 2) RGB LEDs. The technology is promising for super compact, low cost, highly efficient micro and pico projectors.