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sooo lazy today, so here it is in dot points:
+ a peelable "touchscreenprotector-like" screen, in which it has alternating strip of polarized filters, that you stick over your lcd screen. (each horizontal line is a polarized strip, that only display itself to one side of the glasses.)
+ a thick plastic panel, with lots of tiny horizontal black strip, that is stuck to the screen. No glasses needed, as your eyes perceive two different images.
+ lentecular system, lots of little lenses that display different pixels, when stuck over a patterned image. Benefit, no glasses, can look up and down an object as well. Drawback, is that this is expensive.
+ Simple software that uses your webcam (detect symbol on glasses), or a simple sensor, to detect if you have 3d polarized glasses on, and automagically activate 3d feature in your desktop.
+ A collection of software that enable you to make effective use of 3d in normal usage, e.g. 3d google earth
+ Api for 3d games...
All packaged in a box, sold to shoppers next to brand new lcds.
Why this is good:
You can use existing LCD screens to go 3d, and polarized glasses are dirt cheap these days thanks to AVATAR.
You need to calibrate the screen, as people might not position it dead on.
Arisawa Passive Polarized LCD Display
Same idea, already built in [cowtamer, Mar 12 2010]
||This idea works great (see link), but registration would be a pain. Even in some of these monitors where each line is a pixel thick, you get weird parallax errors (so that there's a 7 degree sweet spot for viewing, even with glasses on). The other problem you face is that LCDs are already polarized, and you need to change the polarization during manufacturing.
||Your idea would work great, however, to turn a CRT (or a transparency) into a 3D image viewable with passive polarized glasses. I wish you could buy the XPol material for printers...
||thats why there is the other alternative options that relies on lenses, and mesh screens.
||Zebras do this, sort of. The hair in alternate stripes has a
slightly different angle of reflection (the hair shafts are
different thicknesses). Lions (maybe some other cats -not
sure) are sensitive to the angle of polarization of light,
which they use as an aid to navigation rather like some
||Hence, to a lion, a zebra appears to be displaced into two
different planes of depth, adding to the disruptive
camouflage effect of the stripes. From a distance it has
no effect, but when the lion is moving in for the kill, it can
screw up its depth perception just enough to make it
misjudge that last pounce.