ULTRA WIDE ANGLE OPTICAL SYSTEM FOR LASER TV AND SHORT THROW DISTANCE FRONT PROJECTOR
IDW 2008
Micro Display based (Rear & Front) projectors in general offer HD and are lower cost than LCD and PDP for large screen size. Current non slim RPTV sold in the market do not fit customer needs in terms of form factor and the limited life time of the lamp. Slim and low chin cabinets using Laser sources (Laser TV) enable this technology to compete against LCD or PDP panels for larger screens above 60 inch.
On the other hand, Short Throw Distance front projection is an emerging market. It allows to project a large image with a projection system located only around two feet from the screen. This technique offers new products for projector market for several applications like Home Video Education and Simulators.
Both Slim RPTV and Short Throw Distance projectors need a wide angle projection system with low cost and high performance optical components.
We’ve developed several generations of wide angle optical engines using either UHP or Laser sources. In this paper, we present the latest generation of this optical engine that should drastically change the look of RP TV’s with a form factor close to that of a flat panel. The system could also be used for Short Throw Distance to display bright images on large screen with a projector located near the screen. A technical description of the optical system used on both applications and design results will be discussed.
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