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Discussion Starter · #1 ·
Hi,

amazing to see 4k setup's appearing in home cinema's - and I still have to live with my BG808
A shame there is not too much source material available in that resolution for you to enjoy. At work I'm involved in the selection of a 4k projector for a 6m-wide rear projection on a coated glass screen via a mirror (building layout demands this) driven by an NVIDIA Quadro Plex workstation (4 DVI channels) for simulation i.e. no cinema content. I know this is slightly OT but maybe you've some recommendations on the PJ.


What are the Pro's/Con's between the TI based 4k DLP's (Barco / Christie) and the LCOS based ones (Sony SRX-T420) in terms of:

- color accuracy to support a color calibrated workflow

- color stability, convergence drifts, etc. over longer time (which would require re-calibration)

- lamp lifetime and cost/complexity of replacement (i.e. PJ downtime)

- ease-of-use (no dedicated tech planned to run the PJ)



Thanks,

Martin
 

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Ah the trusty ol' JVC LCoS engine unit. Any improvements/updates in the past four years? JVC introduced a second projector, new LCoS chips a year or two ago, if memory serves me right.


Of course there has been, couln't find the LX-10, but it was in the SIM series: http://www.barco.com/projection_syst...ro_sim10_m.pdf .


This reference is about six meters, judging by the picture: http://www.barco.com/en/reference/3839


For 3D this one wouldn't be overpowered, as the LCoS has to use two 4500 lumens units. http://www.barco.com/en/product/2442
 

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LCoS units work wonders for us. It is a matter of using the proper technology for the proper application. Many of our simulation units use them, they have a super contrast level required for nigh vision simulation.


Still, our Digital Cinema units did migrate to our Simulation division (stereoscopic) with some tweaks.
 

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Yeah, even a fraction of that marketed 10 million to one is great. Added the SIM 10 for that reason. It looks like they all use the same xenon lamps, so no large differences are to be expected there, Trinitron.
 

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Quote:
Originally Posted by CINERAMAX /forum/post/20897275


There is only one option: Home Cinema Optimized Barco 4K, do not waste your time looking at anything else. Resistance is futile.

oh yes i agree



only one poind is that the 4k have a slightly lees good cr. but i think

that is compare to all the things he can do better than everything else on the market and how future prove this pr. is a no issue.
 

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Hi Peter,


Can you please give more info on this set up? what screen are you using? I assume its a passive system, thus you are using silver 4k screen? How is the image look on the silver screen? I've heard a lot of hot spotting comparing to a normal white screen and what about the 2d images on this silver screen. I hope with this set up you don't have to invest in two different screens (that could be very expensive!). thanks
 

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Quote:
Originally Posted by mporlier
LCoS units work wonders for us. It is a matter of using the proper technology for the proper application. Many of our simulation units use them, they have a super contrast level required for nigh vision simulation.


Still, our Digital Cinema units did migrate to our Simulation division (stereoscopic) with some tweaks.
6mil to 1 contrast on some of your simulation projectors ( lcos ), very nice. Much higher then the best HT projector whose environment usually benefits from the higher on/off verses most commercial settings. Regardless how good we have it the HT market and its specs are still in its infancy after seeing this, plenty of room for improvement. I realize it comes down to cost for this improvement but at least higher on/off is a reality.
 

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Discussion Starter · #12 ·

Quote:
Originally Posted by W.Mayer /forum/post/20900897


only one poind is that the 4k have a slightly lees good cr.

@W.Mayer - what did you mean with 'cr' ?


@all, thanks for all the other comments,

the SIM-10 was not on my radar yet, probably because we specified we need a brightness greater than 12.000 lumen. Not sure though we need all that light; the old installation uses two blended Christie S4 DLP with 4.000 lumen ea. and is quite dim. Any comments on that ?

Interesting that everybody recommends Barco, btw. we will visit Barco in Belgium the next days and will check what they have on offer. The other offerings we will check are the Sony SRX-T420 and a model from Christie.


Will keep you posted
 

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Alan, Peter indicated several times this high contrast technology is coming to the DCi platform, as an option, probably somewhere in 2012.


BTW, saw the 'JVC compact SHV projector', it was just sitting on a shelf. I also saw two units of the Sharp 85" Super Hi-Vision (8K) LCDs. One was still switched off, the other was showing a low rez set of test bars and simple coarse text saying London, was the production desk for the multi-city demo this week-end.


Haven't checked the Christie 'largest line up' release yet, but it will probably be on show, again.


Trinitron it is Wolfgangs shorthand for Contrast Ratio.
 

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Discussion Starter · #16 ·
Small update: we visited Barco in Belgium and reviewed their Galaxy 4K-23 pj in two different configurations. The first one in the VR/Sim dept. (not officially on market yet) was projecting on a ~4m wide tinted glass rear projection screen, driven by a PC over 2 x DVI single-links at [email protected] Hz ea. (pj @ 144 Hz) - the contrast ratio and colors looked pretty good (not sure though the 23k lumen will be enough for our 6m screen). We had some concerns on the image stability and flicker when feeding in a 24 Hz signal from a simulation PC so they showed us some film material in their demo cinema on another 4k-23 unit for the DCI market (~8m screen) - the source was a DCI server and the material was RED demo and some film material (so I assume part or all of it was 4k native). Overall quite impressive.


The noise level of the pj was okay standing next to it - is the Sony LCOS so much louder as I was told ?

Next days we will review the Christie unit
 

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At IBC Christie was showing the 4 something 35, with 35K lumens, rear screen was not even 6 meters wide, probably more like 4 meters wide, the light was needed though.


Christie has a demofacility?
 

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Discussion Starter · #18 ·
No, we will review it at a system integrator facility together with the Sony 420 (the Christie demo unit will be shipped to him directly from IBC Amsterdam I believe).
 

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Hi , you would need to do a daily dual or something IF YOU MUST watch 2d. I tell you because I had a visitor who manufactures white acoustically transparent screens.


I told him that this system makes 2-D completely obsolete, using the Teranex configured for minimum ghosting with the realD.


In the beginning 2 minutes he was all over not as much the hotspot but the slight grain slightly noticeable within the hotspot and said the 3d effect is not that strong (perhaps expecting pop up effects), I told him stop looking for stuff coming out the screen and observe instead the parallax geometry, after 5 minutes he started ignoring the small grain and the minor hotspot (this is a 2.2) and saying wow a lot. I kept asking him all along better than 2d? he did agree I caught his afterthoughts in a youtube for later posting. This is someone whose primaries business interests are opposite to a silver screen polarized solution and who essentially says non of his customers do 3d yet said this is the best image he has ever seen.


Like I said 2d is so dead it ain't even funny...
 
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