Delta America Ltd.

Sarnoff Corporation

David Sarnoff Research Center, Inc.

Kenneth E Salsman

Ashok Narayan Prabhu

Satyam Choudary Cherukuri

Lubomyr Stephen Onyskevych

P Niel Yocom

Gary B Kingsley

Amjad I Malik

P Neil Yoco Slashedm

An optical engine in which full-spectrum light is split into its three primary beam components of red, blue and green, which components are then modulated by reflective or transmissive light valve structure and ultimately recombined for projection of a full color image, which engine includes a source of unmodulated full-spectrum light, and immediately optically downstream therefrom, a two-dichroic-surface V-splitter/mirror structure from which emerge the mentioned three primary beam components.

V-splitter for optical engine

An electroluminescent display formed on a ceramic substrate having a front ceramic surface and a back ceramic surface. The ceramic substrate includes a metal core that provides structural support, electrical ground, and heat dissipation. Electroluminescent cells are mounted on the front ceramic surface and driver circuits for driving the of electroluminescent cells are mounted on the back ceramic surface. The driver circuits are positioned directly behind said electroluminescent cells. Connectors extend through said ceramic substrate and the electroluminescent cells to different driver circuits. By positioning the driver circuits close to the EL cells, the drive lines from the drivers to the EL cells are short which allows for high refresh rates and low resistance losses. Each of the driver circuits can drive one electroluminescent cell or a group of electroluminescent cells. EL display cells coupled to a cermet electrode can also be driven by a field emission device or a low power electron beam.

Mounting structure for a tessellated electronic display having a

The invented optical engines are characterized as including generally parallel planar glass plate-mounted or coated dichroic and turning mirror and light valve elements. An important topological feature of the invented optical engines is the fact that like optical elements are positioned and oriented to be coplanar, i.e. the light-splitting dichroic mirror elements are coplanar with one another, the split beam-turning mirror elements are coplanar and the light valves are coplanar. This important feature of the invention renders compact optical engines that are simply and inexpensively manufactured and maintained because the critical optical elements are in part self-aligning when like optical elements are placed in an aligning mounting structure or more preferably on a common substrate that renders them self-positioning and self-aligning relative to one another. A common white light entry region and modulated tricolor beam exit region of the invented optical engines, coupled with equal optical path lengths through the engine, permit the use of a single input pupil astigmatism correction plate near the entry region and a single output image astigmatism correction plate assembly near the exit region of the engines. The optical engines may be used along with conventional other optical elements including, for example, a white light source and an optical output stack, to render a pixel-modulated tricolor projector.

Optical engines for tricolor projectors having co-planar like optical

Tessellated electroluminescent display having a multilayer ceramic

Growing community of inventors

Brush Prairie, WA, United States of America

Kenneth E Salsman