No Subject

[Larry Berlin <lberlin@xxxxxxxxx>]

>Date: Wed, 3 Dec 1997
>From: michaelk@xxxxxxxxxxxxxxxxxx (Michael Kersenbrock) writes:
>..............
>	Idemitsu Kosan Co. Ltd (in Japan) has shown a panel that
>fits in front of a 32" TV screen.  It's a large-area polarizing
>shutter using ferroelectric liquid crystalline polymer technology
>(1 ms switching time).
>
>	Basic structure seems to be using the sticky polymer as a
>glue and glueing two plastic substrates together with it to produce
>a liquid crystal panel.  So it could be made essentially "anysize"
>if a coating machine is big enough.
>
>	This allows it to be put in front of a large screen and
>enabling the use of polarizing glasses.  Unlike "realist" (etc)
>projection systems, the liquid crystals polarize at either +/-
>22.5 degrees (with voltage being switched between +/- 20V), for 
>only a 45-degree difference between the two, so
>I'm not sure how much "other image" suppression is happening.

*****  This sounds quite similar to an LCD panel manufactured already by the
NuVision folks. It fits in front of any monitor and allows for field
sequential stereo viewing using passive polarized glasses for the audience.
Visitors to this past summers NSA convention saw an equivalent screen in use
in the electronic stereo theater which operated with circular polarized
glasses. Perhaps this new product advances the manufacturing of such panels
so that cost can come down. Sounds encouraging.

.................................
>	Anyway, sounded interesting.  Not sure what screen they'd
>put it in front of w/o flicker problems.

*****  That would be any monitor screen and getting rid of flicker is a
process of driving the monitor at a fast enough rate. The better the video
board you use, the better rate you would be able to achieve. 

Thanks for the newer bit of news. The existing panels are quite a bit more
expensive than the prices you mention as possible with this new product.

BTW, I recently received a copy of the current Edmund Scientific Optics
catalog. On the subject of circular polarization it revealed that to produce
circular polarization they place a 1/4 wavelength retarding screen in front
of a standard linear polarization screen and laminate them together. That
bit of information made the comparison of the two methods easier for me to
understand.

Larry Berlin

Email: lberlin@xxxxxxxxx
http://www.sonic.net/~lberlin/
http://3dzine.simplenet.com/


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