Dual Parabolic Reflectors Research Articles

56.2: DPR Recycling Collar for Simpler and Brighter RGBW Pico Projectors

AbstractTraditional pico projector with RGB LEDs uses color multiplexers with dichroic filters and collimating lenses for combining the colored lights, is complex and costly. This paper describes a new LED recycling collar using Dual Parabolic Reflector (DPR) developed to increase the brightness of multicolored LED package with RGBW LEDs with output from each LED recycles back into itself on the same location, thus increases the brightness of each LED independently. In addition, the unique possibility of using the white LED in the multiplexed output provides another dimension in the color scheme, increasing the output brightness. The smaller component count lowers the cost of the system. A DLP projector using this DPR recycling collar will be described.

56.5L: Late‐News Paper: A Real 3D Image Projected “Out‐of‐the‐Box” using Dual Parabolic Reflectors

AbstractThis paper presents a newly developed high brightness Tru3D “Out of the Box” 3D Display without using a screen or special glasses, which produces true 3‐dimensional “floating” images of real objects and LCD display images. This system, using Dual Parabolic Reflectors (DPRTM), creates the appearance of a 3‐D product hovering in mid‐air, outside of the confines of a display case, to draw customer attention as such locations at trade shows, malls and other retail outlets. A 3“ version, for small objects like diamond rings, has been built and demonstrated. A 17” version for larger objects is being built for demonstration. In addition, the Tru3D display can be used for ATM's and other secure transition kiosk using active keyboards such that the user can inputs the PIN numbers in mid‐air without others seeing the entered codes.