Browse Prior Art Database

Improved Electronic Stereo ("3D") Display

IP.com Disclosure Number: IPCOM000040920D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Feigenblatt, RI: AUTHOR

Abstract

Interleaved (or separated) Fresnel lenses can be registered to a flat panel display to send stereoscopic images to the viewer.

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Improved Electronic Stereo ("3D") Display

Interleaved (or separated) Fresnel lenses can be registered to a flat panel display to send stereoscopic images to the viewer.

In the Figure, mixed (R and L) LCD pixels 1 are intended to be viewed by a viewer 2. The backlighting 3 of the LCD 4 is collimated normal to the panel surface 5 by the use of louvered glass 6. This glass 6 is auxiliary to, and therefore bound to, one of the liquid crystal material side walls or optionally could be used as the bounding plate itself. If the louvers are placed between the backlights and liquid crystal material 8, reduced heating takes place. Between the LCD Panel 1 and the viewer 2, there is placed carefully aligned field optics 9 and 10, each of whose Fresnel-optic terrace corresponds to a given column of pixels. The optics 9 and 10 direct the main ray from the respective left or right pixels directly into the viewer's eyes 2. The first acceptance angle of the louvers defines a finite CRT pupil. The Fresnel-optic can be made of a molded plastic, like acrylic.

The left and right parity views can also be made contiguous within themselves and simply butted laterally together. This latter implementation has the advantage that a field lens (of sufficiently high pitch) could be made of two conventional lenses, centers offset, simply butted together over their corresponding parity images, without any requisite relationship between pixel position and Fresnel terrace. It exploits the well-kn...