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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

REDray Projector..

Stuart English said:
Thanks Wayne. If we can help our customers win, we win too. It's all good.
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Yes, I wanted to volunteer as a sales person going around the small cinemas, but at that stage my health was not up to it. A passion for sure, great way to see the country, but I can virtually garrantee most of the small, mostly country, independents would scratch their heads before contemplating if they should get rid of me. Hard sell to these people, as everything and the dominating theater chains in the nearst city is putting them out. We did not have antitrust laws here like the states, so variouse markets got dominated. But, with the national broadband network there is easy way to set up film distribution using Red (which is below the standard data rate) versus existing (which is way above the rate, so costly). But I can easily see that market double over here from new small independent art house theater, even started by film clubs, to concentrate on Indie stuff. I actually am interested in multi-functional venues that can use the projector and seating area for other things in regional location, such as a local sports club that could multi purpose large entertainment venue as theaters when nothing is booked, probably more common over here. See, the market is not so limited, but it would be better if the projector could do a 15 meter screen for $10-20k.
 
BTW Stuart, how does the scanning mechanism work?
 
To summaries. The basic projector is a complex configuration of a beast in the way it is setup, and not conducive to cheap mass production?
 
I wonder, is it possible to serialize a series, or otherwise concentrate, of high efficiency monochromatic leds into a concentrated beam, I guess it is. We have had 80% efficiency leds for sometime over here, but not monochromatic. I believe the inventor is using a similar scheme to an old scheme I came up with, and I might be able to modify the output to monochromatic with a new scheme I came up with. That would solve much heating problems, if the last leds are still working at the low rates of efficiency they used to (I think ir or red beams were the only ones I heard of before working at any reasonable efficencies), however I should be able to change the colors of these too.
 
Stuart English said:
Yes the Display (light modulator and optics) Module is specified to be silent. Auxiliary video inputs plug into the rack mounted Video Processor (REDray player and audio / video circuits) Module which relays those as 4K images to the Display module.
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That's great!
 
What is the latency for the projector? I have plans to use it throughout post, as a one-light, editorial monitor, online/VFX, grading and final viewing. So in editing, latency is quite important for a fast and fluid workpace (at least for me), as well as in grading where I would like to see the changes as I do them, not moments later.

What are we aiming for here? 5ms, 9ms?
 
This projector does not raster scan a laser beam on the screen. It looks to be LCOS with laser light source.
At the present time, it would be illegal to do a raster beam type projector due to antique laser laws in place.

Wayne Morellini said:
BTW Stuart, how does the scanning mechanism work?
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Les Dittert said:
This projector does not raster scan a laser beam on the screen. It looks to be LCOS with laser light source.
At the present time, it would be illegal to do a raster beam type projector due to antique laser laws in place.
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Yeah, I read about the research into single spot systems. There are a number of ways that I addressed these in my own designs. I'm still not giving up how my thing works from the other thread.

I would count a dmd as a scanning system too though. Lcos, that is an interesting CHIOCE. Is anything said anywhere on this? I can speculate on the Lcos chioce, just on the performance needed (reflectivity efficency, heat, type of pixel mechanism, speed). If we knew a lot about Lcos, we could probably quickly narrow down a couple of technologies, and maybe a couple of companies.
 
Christoffer Glans said:
What is the latency for the projector? I have plans to use it throughout post, as a one-light, editorial monitor, online/VFX, grading and final viewing. So in editing, latency is quite important for a fast and fluid workpace (at least for me), as well as in grading where I would like to see the changes as I do them, not moments later.

What are we aiming for here? 5ms, 9ms?
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Another Eh? So by that comment can I assume that you will only grade on a CRT rather than on a LCD or Plasma or DCI projector ?
 
Stuart English said:
Eh ?
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:-)

That was an easy one Stuart, written in a language we are familiar with. What was your last name? ;)

"The basic projector is a complex configuration of a beast in the way it is setup, and not conducive to cheap mass production?"

The design of the upgradable projector over many parts and display mechanism, makes it difficult to mass produce as cheaply as a all in one 15 foot unit using a cheap display engine setup? Cheap production being in the $2k range.

Luv stumping engineers with English! ;)
 
Wayne Morellini said:
... The design of the upgradable projector over many parts and display mechanism, makes it difficult to mass produce as cheaply as a all in one 15 foot unit using a cheap display engine setup? ...
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O.K, just wanted to clarify what your opinion was there.
 
Stuart English said:
Another Eh? So by that comment can I assume that you will only grade on a CRT rather than on a LCD or Plasma or DCI projector ?
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Hmm, I am interested too. LCOS, have reached hundreds of frames of sequential color ages ago, and blue phase LCD can go much high, and I do not know about Los versions of that. However, it has to be, more or less, stable activity at the laser energy input, so a clear 100% on to off, off to on, or anything I between, what is the slowest refresh rate? Going onto another issue Stuart, what is the maximum contrast ratio, and black level on a max lit Lcos? What is the life expectency of the lcos, without performance degregation that would shift relative intensity of any pixel levels by more than 1024th (adding an error of one pixel level on a wide dynamic range). To be fair, it might not be an issue until more than 512th, an error of 256th, how long would that take? Conventional LCD projection systems are notorious for going off.

But, he might also refer to just the time delay between the live video signal being sent and the frame being rendered on screen. I can imagine if there is time delay in camera transmission, computer reception and processing of image data and transmission and projection, then it might also add up to something substantial (btw, happy end of April day over there :-) ) .
 
Stuart English said:
O.K, just wanted to clarify what your opinion was there.
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Don't need a speculative opinion there Stuart, if you spill those little red jumping beans :-)
 
Stuart English said:
Another Eh? So by that comment can I assume that you will only grade on a CRT rather than on a LCD or Plasma or DCI projector ?
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Didn't want to produce an eh here :)
No, I rather use LCD's or plasmas, and the latency for them are quite workable. Just wanted to know a little about latency for editing because it can slip the video out of sync if you aren't getting the audio out of the projector (like when using a mixing table)
 
No, I rather use LCD's or plasmas, and the latency for them are quite workable. Just wanted to know a little about latency for editing because it can slip the video out of sync if you aren't getting the audio out of the projector (like when using a mixing table)
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Well for any digital display device (not an analog system such as CRT) you can assume 1 or 2 frames of processing.

Which is why you slip the audio on the playback device - or feed through an audio delay unit - to compensate for that.
 
Aaron Fritz said:
So I guess This is the Projector from HDI3d. Since that Companys website is offline.
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Huh? The HD-I3D is made by Bernelli (who's site is not offline, works just fine here). And it's a 1080p projector aimed at upper mid-range home theatre installations, it has built in YouTube and Netflix as well as the ability to directly connect your iPod.

Maybe I misunderstood what you're commenting on, but it just seemed really out of place...
 
Jeff Kilgroe said:
Huh? The HD-I3D is made by Bernelli (who's site is not offline, works just fine here). And it's a 1080p projector aimed at upper mid-range home theatre installations, it has built in YouTube and Netflix as well as the ability to directly connect your iPod.

Maybe I misunderstood what you're commenting on, but it just seemed really out of place...
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Different hyphen placement. There was a company called HDI that was doing a laser-based projector.
 
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