For the best experience on our site, be sure to turn on Javascript in your browser. Different manufacturers implement this technology in slightly different ways, but for a very rudimentary explanation of the tech it essentially overlays two HD images on top of each other (depending on the projectors panel / chip), shifted by a half a pixel up, down, left or right quickly so the naked eye cant detect the shifting. :strip_exif()/i/2001220971.gif?f=imagemedium)
Houston, nobody is suggesting these projectors be used on 5' screens. There is source resolution and there is pixel resolution. I think the conclusion of this article is this: We didn't need 4k for home use at all. Epson followed using pixel shifting on 1920 x 1080 3LCD chips. The first point is to consider the content. And at this distance, the pixel structure of the two projectors is obviously different. While this used to be a hugely important spec in the projector business, it is no longer an issue of consequence in the world of pixel-shifting 4K for home theater projectors. So the bottom line is that there are many important factors that contribute to a 4K projector's success. 
And the results? Strict fundamentalists will say the term should be reserved exclusively for projectors that have native 4K imaging devices and that no pixel shifting machine should qualify. What does 4K on the panel mean? Since few people would ever want to sit closer than 1.0x the screen width, we set up to view at a distance of 5 feet from our 5-foot wide images. So put me in the Pixel-Shifting convert category. Buttrue 4K is still a different animal than Faux-K. Pixel shifting technology is clearly a leap over straight 1080p. Lee, you are referring to a known engineering feature of at least the 4K DLP DMDs that causes this false dark frame around the image. The difference here is that native 4K projectors have roughly eight million distinct pixels on their panel to start off with, while pixel shifting tech starts with a lower number of pixels and creates the higher number by using the source image and processing it.Depending on the individual model, some projectors pixel shift twice, some do so four times with the former having a more convincing 4K effect in areas of the image where their is finite detail such as small text.Weve made no bones about the fact that this is not native 4K. It might be fine with static images but movement causes visual problems. When viewed very close up they look not quite perfectly identical as far as the indistinct pixel array is concerned, but they are pretty darned similar. Question, do all 4K projectors automatically (default attempt) upscale all 1080p content? What is moving is the XPR lens (x4) synchronously with the RGB settings of the DMD chip. True 4K, provided color and contrast are of similar high quality is still a different and better beast. I despise these Companies playing this game. Think too about the projector in the context of your unique setup. Evan, Fantastic real world review.
As enthusiasts have known for years, display resolution is not necessarily a major determinant of the final image quality. Understood-people have complained about it for years, but the alternative would be to go with a more current 4K DLP where it's not as obvious or a 4K three chip projector. The increased vibrancy of the UHZ65's picture makes it look subjectively sharper even though it isn't. The projectors that can display the full 8.3 million pixels have now won countless awards from the toughest critics using lamps, lasers, and LED light sources over many years since the article was written. So when we back up from the screen to a viewing distance of 1.5x the screen width and put on some 4K HDR material, the Epson 4000 actually appears to be a bit sharper than the PX727-4K. In this movie there are definitely certain elements in some scenes which are rendered with slightly more detail on the VW285ES. In this case digital noise is a factor - the lower the noise the cleaner and sharper the picture looks. You get maximum benefit from 4K projectors when using them on 100" or larger screens, depending on your viewing distance. Hmmm. Certainly contrast is a critical one--both with HDR and SDR. Its all down to your individual perception of value and how much 4K content youre watching. Sure, good contrast comes from other things too, such as the light source (type, efficiency, etc. 4K, or 4K DCI, is a resolution of 4096x2160px. In this case the UHD60 is higher in contrast than the UHD50, and in many scenes this contributes to the perception of it being the sharper of the two projectors. The UHD60 with its 0.66" chip and two-phase shifting produces a distinct pixel structure. Manufacturers are therefore able to apply the 4K UHD resolution label to devices that dont have this pixel count on their display panel but do have it on the screen.
I think may people will agree that resolution was the first but not necessarily the most impactful feature of the UHD format. These partial frames are projected in quick succession, building up an on-screen image with a 4K UHD pixel count.The video highlights the benefit of native over upscaled. There is no sense of discrete individual pixels. Thanks again. Subscribe now to never miss a thing from ProjectorCentral.com! While I prefer the latter definition myself, what I care more about is that buyers come to realize that the differences in detail resolution between all of these various 4K implementations are extremely trivial compared to the major issues of contrast, brightness, color balance and saturation, and image stability and clarity that ultimately define the greatness of a home theater picture. That holds for all 4K compliant projectors that rely on pixel shifting -- whether we are talking about a 1080p projector that doubles the pixel count for something in between 1080p and 4K resolution (like the Epsons), or a full 4K projector that puts all the pixels in a UHD signal on the screen using pixel shifting (ie, all the single-chip 4K DLP models). Just like how 1080p Blu-ray looks better on these 4K enhanced projectors. The Sony VW285ES ($4999) uses three native 4K resolution SXRD panels. Ive been leaning towards the Optoma UHZ65, but has anyone actually played games on this sucker? The projector can only do so much: if youre not feeding in 4K content, expect to receive a poor quality reproduced image rather than a wow-factor 4K image.Further, the type of content youre watching on your projector also matters. Good active HDR+ along with 10bit or 12bit color with a powerful bulb or laser source will give a better WOW factory than any increases to resolution. The differences might be more obvious. Once we've put the 4K material on the screen, the issue then becomes whether there is a level of fine detail that can be resolved by the VW285ES that cannot by the UHZ645, and whether this incrementally resolved detail is visible to the viewer at a typical viewing distance. Now, let's back up to a more practical viewing distance. Excellent, thanks! The UHD60 has two-phase pixel-shifting to double the number of pixels on the screen while the UHD50 has four-phase shifting to quadruple the number of pixels. If you are displaying still complex graphics in large scale, with viewers being particularly close to the image, the incremental resolution that can come from native 4K chips (like that which can be seen close up in the Sony VW285ES vs Optoma UHZ65 comparison) can be both visible and relevant to the application. Interestingly and curiously, the editor of this article has chosen to compare just one part of the 4K UltraHD specifications, the resolution (which is lets say about 1/3 or even just 1/4 of UHD), and actually leaves out the MAIN and MAJOR part of it, the HDR and Wide Color Gamut (WCG), which, if you read and document yourselves, youll find out is actually what makes UHD new and best, and makes images look so good! Since "4K" is all about resolution, it is not surprising that so many folks have been preoccupied with native 4K vs. pixel shifting 4K, and debating the merits of each. It makes senses this would work because they have already perfected this on the 1080p chipset, so they probably already have this 8k setup now on a 4 phase .66 chipset. The upshot is that there seems to be a narrower spread between the low end and high end in the 4K realm, at least in terms of resolution. A system is only as good as its weakest link. Once again, we start by doing some pixel-peeping close up, from a distance of 12 inches on a 5-foot wide screen. If I couldn't afford a native 4K projector--and I can't--I'd be absolutely delighted to spend my days being full of horse malarkey and enjoy the benefits of 4K HDR content on a pixel-shifting projectorwhich I do. Only Pixel shift 4k projectors? Partial frames from the lower resolution panels are minutely displaced by a rapidly-moving shifting device. This is a different comparison entirely. When comparing these projectors there were obvious differences in detail and image sharpness. In the end, this comparison illustrates that contrast is a huge mitigating factor that can outweigh the perception of image detail, sharpness, and clarity. Even the JVC and Epson models with their simple two-phase shift on 1080p chips can outperform competing 4K projectors on the basis of contrast and black levels and produce pictures that look equal to, and in some cases better than, a competing 4K projector at a similar price. This time we will stand 5 feet from our 5-foot wide screen (1.0x the screen width). On a 120 screen sitting 9-10ft away, the resolution increase of my Epson 5040UB compared to my older Panny PT-AE8000U was very noticable, and worth the upgrade. With these two projectors, with respect to detail definition itself, there is very little if any discernable difference between the two pictures, even when viewed close up. The larger your image the bigger the frame. To no surprise, this has fueled a lot of controversy over what is "true 4K" and what is often disparagingly referred to as "faux-4K" or simply "faux-K." This term is widely used by industry personnel, reviewers, and consumers alike. I'm bored with folks trashing the concept of pixel-shifting because they either haven't seen it with the top-line models and don't believe it's a viable alternative to very expensive native 4K projectors or they just hate the idea. No problem we have an experienced installation team who can install your projector, screen, display and audio. There are projection applications that WILL benefit very directly from native 4K resolution devices. A screen of reasonable size with a standard black felt frame will usually hide it, but if you project on a wall or maybe have a screen with a fine bezel it's just there. Since we are not relying on native 4k resolution, I am asking will the pixel shifting technology manipulate my 1080 youtube video into looking like 4K? There was a massive visible difference in picture quality between SVGA and XGA, and between WXGA and Full HD 1080p. Thus, in theory, if the number and size of discrete pixels has anything to do with it, the VW285ES should be able to resolve more detail than the UHZ65, assuming the three chips on the VW285ES are perfectly aligned. In our new reality of 4K resolution and pixel shifting technologies, there is ZERO correlation between native resolution (the number of physical pixels on the chip) and the actual resolution of the picture you see on the screen. This does not mean the pictures look identical. True 4K sneaks into quite a few product descriptions, while the list below outlines some of the brand-specific terms:BenQ: XPR TechnologyOptoma: XPR TechnologyEpson: 4K enhancementJVC: eShift5While the marketing terminology is contentious, the technology and price point behind pixel-shifting 4K resolution projectors deserve recognition. Freephone 0800 073 0833, Projectorpoint 2022 all rights reserved, Top 7 Laser Projectors For Businesses 2022, Best Meeting Room Laser Projectors For 2022, Why Choose 4K Resolution Displays For Your Business, Choosing The Right Size Display For Your Meeting Room. Both projectors are upscaling a 1920 x 1080 signal to a 4K-like image. Why is that?If you have to qualify the statement that your projector is 4k..It would be much simpler to have 4k and 4k compatible or 1080p+. Has anyone addressed the durability/longevity of phase shift DLP projectors? The big question is, can you see the difference between a projector using authentic native 4096 x 2160 resolution chips, and a projector using two-phase pixel shifting on a native 2716 x 1528 chip? But hey ho I don't think it would be something the manufacturers would reveal. It seems like it's become vogue to think one more 'in the know' if you bag on 4K and start touting the virtues of other things because it makes you sound like you have some kind of hidden knowledge that the masses aren't privy too. This means all the AV devices in the setup, any switchers, splitters, AV receivers and, of course cabling.Achieving the right level of data transfer speed with 4K content is a bit trickier than it is with standard HD. And yet, even with tiny pixels and huge PPI numbers, the higher resolution photograph is obviously superior and anyone can tell that there is more information.
Once you back up to a viewing distance of two feet from a 5-foot wide screen (that is, 0.4x the screen width and a lot closer to the screen than anyone would want to be when watching a movie), all hint of visible pixel structure disappears on both projectors. This is simply not the case. Nobody I know of with a projector uses such a small screen. I honestly found it such a distraction in dark scenes that I've gone back to a 1080p projector. If the scaling electronics are good, you'll get a good result with your 1080p content. I don't think politicizing tech by using fundamentalist and tech liberal is helpful at all. Great editorial. The 5' images in this test were used simply for comparative evaluation of the projectors when they are both projecting the same size image. We hope the above 4K resolution : Native Vs Upscaled guide has given you a clear understanding of the basics in what to look out for.We understand there is a lot to take in and a lot of choice so if you still need help we're only a phone call or email away. Small differences in image detail which are obvious when examined close up become insignificant or even invisible when you sit back to enjoy a movie in a typical theater set up. I know that we are limited on any 8K media, but having the equipment now only will keep disc media alive because there is no way they can stream this yet and 4K up sampled to 8K would be excellent. 4K UHD resolution is the consumer market standard. My question is - if I use a 4k pixel shift projector such as a BenQ TK700STi, would that automatically upgrade ALL of my viewing experiences? Pixel shifting was and probably still is used as a con game to convince people to buy a projector they thought they were getting instead of what they were actually getting. Once you move to a viewing distance beyond 1.0x the screen width, the eye's ability to resolve the subtle differences in detail between these two projectors evaporates. "Different manufacturers implement this technology in slightly different ways, but for a very rudimentary explanation of the tech it essentially overlays two HD images on top of each other (depending on the projector's panel/chip), shifted by a half a pixel up, down, left or right quickly so the naked eye cant detect the shifting. I appreciate the thoroughness and the acknowledgement that not everything involving picture quality is about the number of pixels. In other words, in this case we have a projector that many will dismiss as "faux-K" actually beating a "true native 4K" projector in perceived image sharpness. Let's now consider the display of an HD 1080p picture rather than 4K HDR. Optoma - I wonder if the differences between the phases affects refresh rates in the various 4K formats like 60hz etc and if it impacts input lag in anyway? It is a terrific technology that is hard not to love once you see it. Hey Evan, Great write up, really getting the discussion going. However, with HD 1080p we once again encounter a big difference in contrast, except this time the VW285ES wins. And has been a god send) You could calculate how far the light overspill would be. So not only does native 4K imaging have a set of applications for which it is uniquely advantageous, 8K does too, and it is coming sooner than you think. With an HD 1080p source, we no longer have the extreme detail in the source itself. Meanwhile, contrast is of utmost importance. Dont forget that your entire setup needs to be 4K compliant to allow your projector to display the striking 4K images you expect. Ive seen no such projector that is 1080p look like a 4K image. When you consider you can get a 4K enhanced projector such as theBenQ W2700 for as little as 1360 compared to the native 4K UHD starting point of 5,000, you can see why this option has gained so much attention. The short answer is yes, you will enjoy enhanced detail with 1080p content on one of these 4K-friendly projectors. So these two models compete directly both in resolution class and price. HDR in particular does have the potential to alter the viewing experience for the better, though more so with high-light-output flatpanel TVs than with projectors, which do indeed struggle with hitting the highlights in an impactful way. Now that doesn't mean that a projector with superior contrast or more accurate color won't be deemed superior in overall enjoyment. So the HC 4000 paints two slightly offset 1920 x 1080 images per frame while the PX727-4K paints four. For the best experience on our site, be sure to turn on Javascript in your browser. Though as previously noted, theyre less subtle with high-resolution graphics and text. Weve made no bones about the fact that this is not native 4K. What is questionable is the life of the XPR module, aside from the noise it makes. And as we know, high contrast makes a picture look sharper.
The original 4K signal is first down-converted to much lower HD resolution before being fed to each HD image panel. Thanks for your comments, Felix. The display panel, therefore, can be native 1080p (as seen in 3LCD and some entry level DLP models), Some DLP models might use a chipset using 2176x1528 micromirrors, the device projects the same pixels twice, thus creating twice as many pixels on the screen resulting in a crisper image. Take for instance cheap plastic lense used in expensive 4K Sony projectors. Unfortunately, all of these vital factors tend to get sidetracked when the consumer becomes preoccupied with the almost irrelevant issue of device level resolution. Let's put these two projectors side by side and take a close look. And this is a huge however - the Epson HC 4000 is much higher in contrast with much more solid black levels than the PX727-4K. Any conclusions reached based upon the number of discrete elements in the panels are erroneous, For the person talking about 110" screens, you're right, 4K is not for you.
If you want to get the most out of your projector, take a moment to wrap your head around the different ramifications of this jargon dense as it might be. In addition, one of the biggest factors influencing what you see as image detail and sharpess is contrast. But to call it a "con game"or a "game" at allis uninformed and arrogant. Today there are 4K projectors using chips in various physical resolution formats -- 1920 x 1080, 2716 x 1528, 3840 x 2160, and 4096 x 2160. The point at which this occurs depends on the contrast of the subject matter, but with the 4K HDR movie Lucy it appears to happen at a viewing distance of about 1.3x the screen width (with my 20/20 vision). Let the buyers and sellers beware! You know JVC and Epson will finally release a native 4k chip only in a year or so to add their next E-shift technology to take them to 8k when they already have this developed now. Heres a quick guide to HDMI cables for 4K resolution formats :Basic 4K less than 10-bit colour, no HDR =10.2Gbps.Standard 4K 10-bit colour, no HDR =11.1Gbps.Advanced 4K 10-bit colour or higher and HDR =18Gbps.You can find out more about home cinema cabling in detail in ourcabling guide.Finally, check out a range of4K projector screensto complete your setup and ensure that none of the details from the image is lost to visual noise created by screen material structure of non 4K screens such as standard matte white. Contrast (and other factors like digital noise, lens resolution, and video processing) become the determining factors in one's perception of the picture's overall sharpness. What is this? Are these different technologies from native 4K?Those selling you the latest tech dont always take the time to explain the difference between these terms and how this difference affects your purchase decisions. Both? But as always it comes down to the overall optical path. All of these 4K projectors regardless of chip type are able to create images in a class that is legitimately understood as 4K resolution. Combined with HDR - we now have affordable projectors that can display pixel correct images at 2-3 times the size of a 75" TV - enabling massive size home theaters and 4K simulators at affordable price points. I own the Epson 5040UB, and before I saw the image, I was suspicious about Pixel-shifting, because I had seen some pretty garish video enhancements before (Darbee comes to mind). As with any new development in technology, theres a whole load of jargon associated with 4K projection which, unless youre a tech expert, can often be quite difficult to understand. This is the 4K resolution used by the cinema and video production industry. But pixel-shifting is entirely different, and I look at the image my Epson 5040UB puts out when given 4K Source material, and it is stunning and elegant, and I just couldn't imagine it being any perceptibly sharper. The minimum HDMI cable size you need to deliver basic 4K, therefore, is a 10.2Gbps cable. Viewing distance is a huge factor in perceived resolution. With true 4K source material, a true 4K projector that is displaying simultaneously the entire array of pixels will have an advantage in actual information visible. It's well organized, well written, objective, and well supported with concrete examples. This four-phase pixel shift is remarkably potent as far as rendering detail is concerned.
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