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Interleaved (or separated) Fresnel lenses can be registered to a flat panel display to send stereoscopic images to the viewer.
English (United States)
This text was extracted from a PDF file.
This is the abbreviated version, containing approximately
53% of the total text.
Page 1 of 1
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,
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...