Originally Posted by Wookii
Interesting read. Though I already knew loosely how they worked, I wasn't aware that the 'spacial modulator' operated in 'zones' - I had always assumed that it would have the same number of micro-mirrors as the main imaging DMD (so 4K in this case) - I would have thought anything less (like 1080p) might cause haloing. Maybe they get around that by passing the light "through a single, hollow integrator to blur the seams between the individual rods in the array".
I also didn't know the 'spacial modulator' mirrors remained static throughout the frame - that makes it a lot easier to implement.
It does surprise me that this system hasn't been implemented on lower level projectors by other manufacturers. Maybe there is too much light loss for smaller lower cost projectors currently, but it would seem simple enough and not particularly costly for DLP manufacturers to add these to a light path design.
Firstly, the design is patented. So nobody can copy it until after the patent expires.
Secondly, there's an exclusivity agreement with Dolby by Christie with respect to sale and usage within commercial cinemas, hence exclusive to Dolby Cinemas worldwide only.
However, I realized that said exclusivity does not encompass the consumer/domestic market; which is how I got my foot in the door and met with Christie's vice president of engineering and head of product development a couple of years ago, and got the ball rolling regards opening the doors with respect to persuading Christie to consider allowing to technology to be sold into home theater/cinemas. I continued to converse with them thereafter, where it took some convincing for a variety of reasons that I can't disclose. But either way, this is not something that could have been implemented on lower level projectors by other manufacturers, even if they felt inclined to do so or were prepared to invest the necessary R&D resources
Originally Posted by Wookii
Even the LCOS manufacturers could replace some of the mirrors in the individual RGB light paths with an additional chip and multiply up the contrast.
This has not been done historically for multiple reasons... firstly, there has existed design patents preventing that from happening as well... and secondly, doing so has had associated technical issues/challenges, the primary one being that of efficiency, in that the efficiency is 25% at best, meaning there is at least a 75% reduction in light output (and that's before you start adding BT.2020 color filters!) which is all well and good for use in planetariums where all you are projecting a low APL starfields but not for video projectors where you want to project video content that is above circa 3-5% ADL. There are projector manufacturers who have previously looked into doing precisely this, but who discounted doing so for these very reasons
Incidentally, I mentioned in another thread that there are other multiple interesting high-end projectors in the pipeline as well; and these also similarly make use of novel technology that is protected and so cannot simply be copied by others. I'm bound by NDAs with respect to those as well at the present time so can't reveal the details yet; however, I will be able to do so a little later down the line. But what I can say right now is that they also offer potentially game-changing video projection performance, including all of incredibly high contrast (both
ANSI), dynamic range, gamut coverage, and HDR performance, with very high light output levels. Also, some of these are something that can be applied to create entire ranges of projectors with higher performance including at all price points, so not just expensive flagships that 99% of folks cannot afford
Let's just say that modular video walls are most certainly NOT going to be bringing about the demise of video projection...