Small Correction to Nigels Post on native contrast of the 2 4k DMD Chips

[Peter CINERAMAX]

https://www.avsforum.com/forum/86-ul...l#post57981076


"At the time of developing the product there was no native 4K 3-Chip DLP DMD Chipset available to purchase from Texas Instruments. The only chip in existence at the time was the 1.43" Cinema chip, however this was unavailable due to still being within exclusive license agreement between TI and Christie, Barco, and NEC for exclusive use within their D-Cinema projectors.

What is really needed is a Native 4K resolution DarkChip 3-Chip DLP DMD, but as of today no such chipset exists.

TI have a new native 4K chipset due for release soon, however, this is a smaller chip as compared with the 1.43" Cinema chip, being circa 0.95", and is specced by TI as having comparatively worse contrast performance."

Last statement is inaccurate.



Hi Nigel, the native contrast of the TI 4k 1.43 chip is 1,800, the native contrast of the NEW TI 4K .95 chip is 2,300, so the regular D-cine Barco projectors are planned for a significantly higher contrast variants say 6,500:1. Those new Barco series of NON HDR are revolutionary in the smarts built in to everything, every internal component has feedback telemetry that is continualy monitored or interacted with, even the amounts of dust clogging the filters. This is the past was calculated based on hours of operation. The light dimming tracking on the new 4 series is the best it has ever been.


There is one area where the 1.43 has a better spec, less potential for speckling, but not native contrast. Carry on your good deeds. Cheers!

[donaldk]

DPI has been selling non-cinema grade 3 DMD 4K projectors for many,many years, Nigel does know this as he commented on the initial ISE 2018 showing of the pixelshifting version '8K' from the 4K DMDs version. In the old days the story was that TI selected the top 1% of production for cinema, the next 3 percent or so for commecial projectors, like those by DPI. The rest supposedly discarded, or perhaps used for the original purpose of DLP development, as switches? ??

Secondly the 4K DMD is specced at 1.38", not 1.43". It has been for years not just the latest like in this Christie CP4325 spec. sheet:

• 1.38" Enhanced 4K 3-chip DMD DLP Cinema

[Peter CINERAMAX]

At cinemacon you could see that Barco's 2 new initiatives seem to be moving towards the aim of lowering the floor.


A) Tom Bert (Product VP for The Alchemy and the Series 4) Told me that the reason the Alchemy 3 supersedes on the new projectors the Alchemy -X is that a new Back pane had to be designed for the alchemy to be able to talk to the lasers in HDR.


Why would a media server hdmi input card need to talk to the Lasers?


B) Ignace Rombaut VP of the projection systems division, gave me a full walkthrough of the insides of new series 4 projectors, we discussed how it is equipped to be made into a P series in the future, we got to talking about laser dimming, they had to develop tracking electronics that preserve a remarkable linear LD, in other words the color does not change at all as you dim away. This segwayed  into a discussion on dynamic dimming on another cinema projector where there are issues. Ignace told me I do not why? We can dim RGB perfectly with our new architecture.


So my crystal Ball sees that "Barco Being Cinionic" will not the let the potential of light steering being complemented by dynamic RGB dimming go by when they unveil their new super hdr projection ecosystem ( 1 piece-2 piece add on to the 4 series) next year.


Any Wagers?