TECH: Mixed CRT and LCD HMDs

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2 total messages Started by Diego Montefusco Wed, 20 Jan 1993 23:54

#2991

Author: Diego Montefusco
Date: Wed, 20 Jan 1993 23:54

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I was having a shower this morning and this awful though came to my mind.

LCD are poor resolution. CTR are not, but usually are monochrome (I still
have to understand if the BOOM has REAL color capabilities...)

So: why not make (for an hi-end device, of course) a viewer in which you
have 4 - FOUR - screens? 2 hi-res monochrome CRTs, 2 color LCDs.
For each eye you superimpose the hi-res CRT image with the low-res LCD colored
one: I saw this done for a Mac game, in which you had an animation playing,
with the color pixels actually being big 4 times the pixels of the contours...
I think is like drawing separately the signals of CHROMA and LUMA.

>From an economic point of view I don't think this could be a great problem:
if you are able to spend some $70K for a BOOM, one or two thousands more
for better color is accetable, I suppose.

Maybe this idea is completely foolish, but maybe it's not so stupid as it
may seem. Maybe I should just sing when having a shower, like everyone does.

Let me know

Diego

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   | Diego Montefusco     |         Computer Science Department          | 
   | Via Pirano 4         |         University of Milan - Italy          |
   | 20127 Milano         |                                              |
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Re: TECH: Mixed CRT and LCD HMDs

#3051

Author: David Ray
Date: Mon, 25 Jan 1993 18:52

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In article <1jvoeuINNkgr@shelley.u.washington.edu>
diego@minerva.st.dsi.unimi.it (Diego Montefusco) writes:

>LCD are poor resolution. CTR are not, but usually are monochrome (I still
>have to understand if the BOOM has REAL color capabilities...)

LCD TV's are poor resolution, but LCD projection panels or monitors
are not. It has nothing to do with it being an LCD, it is because
ordinary NTSC video has lower resolution than a standard 640x480 VGA.

>So: why not make (for an hi-end device, of course) a viewer in which you
>have 4 - FOUR - screens? 2 hi-res monochrome CRTs, 2 color LCDs.

You can do hi-res, low weight color by using (for example) two color
LCD projection screens. These are generally availbale for VGA
emulation (640x480) and the more expensive ones have active matrix,
which you need for ghost-free imaging. These puppies cost around $4000
each, but the prices are coming down.

When I was at MacWorld a few weeks ago I saw a company that was
selling color LCD screens for Powerbooks. I thought, if they can do
for power books, why not sell a separate LCD monitors as a stand-alone
product?  Perfect for VR. Alas, they would only do the Powerbook
screen swap, they don't sell separate monitors. I also saw 2 companies
that sell color LCD projection panels. They are expensive and nobody
sells a "monitor" version (with a backlit panel behind the LCD). It
seems this would be theperfect product for VR. I guess there just
isn't a big enough market.  
-- |

David Ray 
Space Sciences Lab, UCB |"I
need a cheap hires| | daveray@well.sf.ca.us (510) 643-7736 w | LCD
monitor for my | | daver@sunspot.ssl.berkeley.edu (510) 527-9010 h |
HMD."  |

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