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DLP projectors in Theme Parks-- problematic?

 
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lightguy



Joined: 30 Mar 2008
Posts: 42

PostPosted: Thu May 29, 2008 6:14 pm    Post subject: DLP projectors in Theme Parks-- problematic? Reply with quote

So I'm wondering if anyone knows about single chip DLP projectors used in any theme parks and if the common "rainbow effect" leads to motion sickness or an otherwise unpleasent guest experience.

(about the rainbow effect: http://en.wikipedia.org/wiki/DLP#The_DLP_.22rainbow_effect.22_in_single-chip_systems )


Thanks!
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Jason Read
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Holly
Site Admin


Joined: 06 Aug 2007
Posts: 229
Location: Orlando, FL

PostPosted: Mon Jun 02, 2008 12:00 am    Post subject: Reply with quote

Hmm.. I've never heard of the rainbow effect... That's really interesting...
But now that I think about it, I have noticed some color artifacting on some modern displays -- especially moving signage and nighttime displays at tourist places...

Personally, I haven't had any problems with theme park rides. Some films I've seen have mild strobing, but nothing intolerable. (Of course, the only things I find really intolerable to look at are: any CRT at below 75kHz refresh rate, strobe lights, ultrabrite LEDs at night or anything else really bright at night, and... umm... some of the experiments we used to do at the Virtual Reality lab involving large scale 3D projections, movement and shutter glasses -- those made me really sick!!

Can the rainbow effect make people sick? Now that I know about it, I'm going to watch for this effect... I wonder if anyone has done a study on that...

Making people sick = bad!!!! (Obviously)... So, the more we know about perception, the better!
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Loric



Joined: 03 Jan 2008
Posts: 143

PostPosted: Mon Jun 02, 2008 1:12 pm    Post subject: Reply with quote

It's noticeable in some Disney attractions most notoriously the projected busts in the graveyard of the Haunted Mansion were upgraded and now have an occasional rainbow.

Never heard of it making people sick or anything though.
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lightguy



Joined: 30 Mar 2008
Posts: 42

PostPosted: Mon Jun 02, 2008 2:10 pm    Post subject: Reply with quote

thanks for mentioning the singing busts, I remember noticing it myself now.
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wokcreative



Joined: 24 Aug 2007
Posts: 197
Location: ProgressLand

PostPosted: Wed Nov 12, 2008 2:53 am    Post subject: Reply with quote

I just saw this post (getting caught up), and have noticed rainbow effects with my sunglasses on. They are prescription and I always thought it was the polarizing in them. I see the effect on buildings with a lot of glass, windows in cars that are treated, and especially in Mr. Potato Head's projected eyes. The first time I saw him, I thought there was something wrong. They looked blood-shot, until I took off my sunglasses. It felt like a sort of x-ray effect. It was during the early testing, so I figured we were being watched by people operating him, wondering why we were looking through the glasses...
Interesting topic.
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