CEDIA Expo 2016 and IFA Preview

Next month (Sept. 2016) is the time for the largest home theater oriented trade show in the USA – CEDIA Expo 2016 (14-17 Sept. in Dallax TX).  It’s also the time for the largest consumer electronics show (including Home Theater products) in Europe – IFA (2-9 Sept. in Berlin, Germany).  Traditionally video projectors, and often related products, have been introduced at one or both of these annual trade shows.  This blog discusses what new home theater projectors (with a focus on 4K compatible models) we expect to see announced and perhaps demo’ed at these events.    The information provided in this blog is a combination of officially released information, rumors from generally reliable sources, and educated speculation.

NEW PROJECTORs

I’ll discuss what we expect to see in the way of home theater projectors from the mainstream manufacturers.

EPSON – With unusual timing, for Epson, the replacement models for Epson’s popular mid-level models were already announced back in June.    These include the Home Cinema models 5040UB and 5040UBe (pictured below) and the Pro Cinema models 4040 and 6040UB.  The most prominent update of the previous generation models is the inclusion of pixel shifting technology along with the projector’s 1080p 3LCD display chips to offer support of 4K UHD video inputs (Epson calls this “4K Enhancement”).  This brings “4K-lite” capability into the market segment of mainstream, moderately priced, home theater projectors.   Previously the JVC DLA-RS400, with a list price of just under $4,000, was the least expensive projector to offer similar “4K-lite” pixel shifting technology.  In addition to the pixel shifting for improved resolution, these new Epson models also support High Dynamic Range (HDR) and Wide Color Gamut (WCG) as being offered by 4K UHD Blu-ray discs and some on-line streaming video services.  List prices for the new Epson Pro Cinema models range from $2699, for the model 4040 up to $3999 for the 6040UB.  The Home Cinema 5040UB lists for $2999 while the version with wireless HDMI (model 5040UBe) lists for $3299.

Epson 5040UB

Epson Home Cinema 5040UB Projector

In addition of the “4K-lite” projectors  mentioned above, Epson has been offering  for the past several months lower-end 1080p models including the Home Cinema models 740 (720p), 1040 (1080p) and 2040 (1080p). Some of these models were introduced nearly a years ago and it’s possible that Epson will have something new to announce at CEDIA Expo or IFA for the budget end of their wide range of projectors.

Two years ago Epson introduced their flagship Pro-Cinema projectors, models LS10000 and LS9600.  The LS10000 featured pixel shifting for “4K-lite” resolution while the LS9600 was as conventional 1080p projector.  These were Epson’s first projectors to use “LCD Reflective” display technology (equivalent to LCoS) and both models used a laser-based light engine.  I expect Epson to announce a replacement for at least the LS10000 at CEDIA Expo.  This is speculation on my part, but given that Ultra HD Blu-ray discs are now available, I would expect Epson to introduce a replacement model with improved support for this new 4K/UHD video source.  More specific, the likely enhancements would include support for 4K/UHD HDR and improved support for WCG video sources.  Also the light output may be increased to better accommodate the display of HDR content.

JVC – Last year JVC enhanced their pixel shifting technology for “4K-lite” and added improved 4K/UHD support by accepting and displaying 4K/UHD video with HDR and WGC, such as available from 4K/Ultra HD Blu-ray discs.  JVC also last year increased the light output of their projectors and lowered the price on their entry-level model.  We reviewed both the entry level model DLA-RS400U as well as the flagship model DLA-RS600U and found both to offer outstanding performance.  So what’s next from JVC?  There  is what appears to be a well informed source in Europe claiming the JVC will introduce/demo a native 4K resolution flagship projector at IFA and CEDIA Expo that will also feature a laser light engine.  We do know that JVC has previously produced both 4K projectors as well as projectors with laser light engines for the professional and simulation markets and I have previously heard from JVC sources, going back to 2014, that native 4K displays for consumer projectors were being investigated.   From the rumored information it appears this new JVC native 4K projector would sell in the $30,000 (or perhaps a little less) price range.  While this would certainly be expensive, such a projector from JVC would compete directly against Sony’s VPL-VW5000, which carries a $60,000 price tag.  Again, this is based on an unconfirmed rumors, but it does appear there may very well be some factual basis for this rumor.

UPDATE (10 August):  Confirmation – the JVC UK web site now has a IFA preview and JVC USA web site a CEDIA preview for the new DILA 4K projector using “BLUEscent” (i.e., JVC’s trade name for their blue laser/phosphor wheel technology).

As for JVC’s current projector line-up, I would expect these models to be most likely continued for another year, or at most, slightly updated versions to be announced at CEDIA Expo/IFA.

SONY – Last year at CEDIA Expo Sony announced upgraded versions of their lower-end native 4K projectors as well as announcing a new flagship model VPL-VW500o ($60,000) using a laser light engine.  That latter projector didn’t begin shipping until a few months ago so I don’t expect any replacement for the VW5000 to be announced at this year’s CEDIA or IFA shows.  However, the previous flagship, and now aging, model VPL-VW1100 was carried over again for 2016.  I would expect Sony to announce a replacement for the VPL-VW1100 to offer support for such capabilities as HDR, HDMI 2.0a, and improved WCG compatiblity with 4K/Ultra HD Blu-ray discs.  There are some unconfirmed rumors floating around the web that a VW1100 replacement will have a laser light engine, but with lower light output than the flagship VW5000.

As for Sony’s lower-end (but still rather expensive) native 4K models, HDR support was added last year, but WCG, supporting least DCI P3 color space, is lacking from the current models.  Also these models do not have full bandwidth for their HDMI 2.0 input.  So perhaps, Sony will offer up replacement models for their VW3xx, VW5xx and/or VW6xx series of projectors that will be capable of more fully supporting the features offered by the latest 4K/UHD video sources, i.e., Ultra HD Blu-ray discs and streaming 4K video sources, and upgraded to provide full bandwidth HDMI 2.0a (or 2.0b) inputs.  This is all speculation at this point, as Sony has not yet released any official information on their planned product introductions.

DLP 4K PROJECTORS – Last year during CEDIA Expo Texas Instruments (TI) held private showing of an engineering model 4K DLP projector.  Consumer home theater projectors based on the TI 4K chip-sets are now forecast to begin shipping within the next few months.  This design uses pixel shifting, but unlike pixel shifting projectors from JVC and Epson, the TI design starts with a display chip that can display one half the pixel count of a native 4K display while the JVC and Epson projectors use 1080p display chips which only have one fourth the pixel count of a native 4K display. This means with the DLP approach the full 8M pixels of a 4K image/frame can be displayed as two 4M pixel sub-images.    As with conventional 1080p DLP projectors that use a single display chip plus a rotating color wheel, these new DLP 4K projectors can still be subject to a visible “rainbow effect”.  This results from using a single display chip and sequentially displaying the red, blue and green sub-images.  In fact the initial designs for the 4K DLP projectors appear to provide a maximum effective color wheel speed of 3X while the better home theater 1080p DLP projectors frequently offer 5X or 6X speeds.  I assume the 3X limitation is due to the need to display each 4K image as two half resolution sub-images.  That would mean that a color wheel rotating fast enough to provide 6X speed in a 1080p DLP projector would, at that same mechanical rotation rate, only be providing 3X speed in a 4K DLP projector.

So who is going to be offering these 4K projectors and what will be demo’ed at CEDIA Expo (or IFA)?  Both Optoma and Benq have already announced plans to release 4K DLP projectors in the 2nd half of 2016.   These are expected to include both entry-level lamp-based models, with prices starting in perhaps the $5000 price range, as well as more expensive LED based models.  Neither Benq nor Optoma are listed as exhibiting at CEDIA Expo (however, Optoma is listed as exhibiting at IFA).  in any case, there is always a chance their projectors might show up in some other exhibitor’s booth at CEDIA Expo.  It’s also possible one or more of the more upscale DLP projector manufactures, that do have exhibit booths at CEDIA Expo (e.g., Digital Projector, SIM2, etc.), will announce a 4K projector using the new TI 4K chipset.

– See more Projector at: https://projectorpro.in.th

Epson PowerLite 955WH Projector Review

The Epson PowerLite 955WH is a higher-end model in Epson’s Powerlite 9xx series of classroom projectors.  While Epson markets the PowerLite 955WH as a classroom projector, but it would also be suitable for use in many business/conference room applications.

This model has a native 1280 x 800 (WXGA) resolution with a 16 x 10 aspect ratio.  With discounts available for education institutions,  the PowerLite 955WH is a cost effective solution for schools, or businesses, needing a bright projector with good color accuracy.

The PowerLite 955WH projects a sharp image that is bright, while providing good colors and offering a lot of performance for the money.

Epson offers other models in the Powerlite series that feature similar WXGA resolution as well as models with lower XGA resolution. We previously reviewed the entry-level XGA resolution PowerLite 97H as well as a previous generation WXGA resolution model Powerlite 99W.  Both of these projectors received out Hot Product award so it not too surprising that the PowerLite 955WH also proved to be an very good performer and also earned a Hot Product award.

Overview

The Epson PowerLite 955WH is a compact classroom projector offering a very bright image and features well suited to the typical classroom environment.  It projects a very sharp image, with its native 1280 x 800 resolution, and offers picture modes providing good color accuracy.   While the PowerLite 955WH is not a pico or pocket class of projector, it is a compact unit making it easy to move between classrooms (or conference rooms), when it has not been permanently mounted.  With a retail price of $899 and a relatively long 5,000 lamp life (in normal mode and up to 10,000 hours in Eco mode), it provides an economical solution for the education market.   The PowerLite 955WH is one of the higher-end models within Epson’s PowerLite 9xx line of classroom projectors that starts with the entry-level model PowerLite 97H, with XGA resolution and a rated 2700 lumens of brightness, which sells for $350 less than the PowerLite 955WH reviewed here.

Highlights

  • Offers a bright image with 3200 rated lumens, in brightest mode
  • Very sharp image provides excellent text readability for business/classroom presentations
  • Excellent video scaling performance
  • Picture Modes offered with good color accuracy suitable for displaying video and photos
  • Moderator function supports split-screen display with content from up to 4 networked video sources
  • Wired networking built-in and optional wireless networking
  • Can be controlled and managed from networked PC using supplied software
  • 1.6x zoom lens along with keystone correction provides very good mounting flexibility

Network Based Functions

The Powerlite 955WH comes with an optical disc that contains network related software plus additional software is available from Epson’s web site for several network enabled functions including:

  • EasyMP Network Projection software sets up your computer for network projection
  • EasyMP Monitor software (Windows only) lets you monitor and control your projector through the network
  • EasyMP Multi PC Projection software allows you to hold interactive meetings by projecting the computer screens of users over a network
  • EasyMP Network Updater software (Windows only) allows you to update firmware for a projector over a wired LAN.

The Powerlite 955WH is also compatible with Crestron RoomView(TM) network monitoring and control systems.

Moderator Functions

The PowerLite 955WH supports a “Moderator Function” that Epson describes as:

“Multi-PC projection and Moderator function allows up to 50 devices to connect over a network and then select up to 4 to project simultaneously.”

As illustrated below, this allows the teacher/moderator to select the content to be displayed from up to 4 devices (i.e., PCs, MACs or mobile devices), from a maximum of 50 connected devices.   The network connect can be either wired or wireless, with the optional wireless adapter.

PC-Free Slide Shows

A flash drive can be plugged into the projector’s USB connector to display photos, slideshows and videos without having an attached computer.  The projector’s remote includes the buttons needed to navigate through the photo slide show or video.  This can be useful when the projector is being used as a portable unit for doing a quick setup for hassle-free presentations.  The PowerLite 955WH supports the basic types of photo files (i.e., jpg, bmp, gif, and png) as well as avi video files.  While some other business or education projectors may support more file types for PC-free presentations, such support for Microsoft Word/Excel/Powerpoint files, this projector’s more limited file support should be adequate for most education or business applications.

Support for Mobile Devices

Projection of content from iOS or Android devices is supported when the the optional wireless network module, $99 accessory, is installed on the projector and when the mobile device has installed the free Epson iProjection app.

MHL Support

MHL is essentially mobile HDMI.  The Powerlite 955WH supports MHL devices on its HDMI #2 port.   MHL is relatively recent, so it may see a lot more capabilities down the road.  To be effective, since MHL supports video, audio, and command and control, a projector really should have its own sound system, which the 955WH does (with a mono speaker).

Some phones and tablets, as well as all kinds of other smart devices are being designed with MHL.

Instant On and Direct Power Off

This is an not a common feature for a lamp-based projector.  While Epson refers to “instant on” it is really more of a quick turn on.  Also the projector turns off the cooling fan very soon after powering off the projector.  This feature allows the projector to be connected to a electrical circuit that can be switched to turn the projector on or off.

Instant On and Direct Power Off

This is an not a common feature for a lamp-based projector.  While Epson refers to “instant on” it is really more of a quick turn on.  Also the projector turns off the cooling fan very soon after powering off the projector.  This feature allows the projector to be connected to a electrical circuit that can be switched to turn the projector on or off.

See more Projector at https://projectorpro.in.th

BenQ TH670 1080p Projector Review

the BenQ TH670 is an inexpensive, crossover 1080p projector for home and office. The banner at the top of BenQ’s TH670 webpage reads “Home Entertainment Projector,” and some features–notably full 3D support and a fast lag time for gaming–aren’t of much interest for office use. But the model name shows up on both the Home Theater and Business lists on BenQ’s website, and the projector can do a credible job in either role.

The 1080p resolution and 3000 lumen rating are appropriate for presentations with fine detail in a mid-size conference room and for HD video that can stand up to ambient light in a family room. More important is that the TH670 delivers suitable image quality for both applications, which isn’t true for much of the competition. Most DLP models are tweaked to show fewer rainbow artifacts for either data images or video, for example, depending on what the model is meant for. The TH670 shows very few of these artifacts with either kind of image.

Picture Quality

Color Preset Modes. The TH670 offers four customizable color modes: Bright, Vivid, Cinema, and Game. In addition, there are two User modes, which you can rename, so you don’t have to remember which one is meant for what.

As a practical matter, for business presentations and other data images, Vivid, Cinema, and Game modes all deliver well-saturated, suitably eye-catching color. For video and photos, Bright mode has an obvious green bias, as is typical for the brightest modes in many projectors. Color in the other three modes is more than acceptable overall, but a bit short of excellent.

In a direct comparison with the calibrated projector we use as a reference, it’s easy to see that the TH670’s colors are a little dull and dark in all modes. Without side-by-side images, however, colors look obviously dark only in Bright mode. Whether you’ll notice the issue in other modes will depend on how well-trained an eye you have. However, a minor loss of color fidelity is forgivable for such an inexpensive projector. Color balance is excellent in all modes, with neutral grays at all levels from black to white.

BenQ TH670 Home Theater Projector

Data Presentations. Not all 1080p projectors hold detail equally well. The TH670 does swimmingly on this score. White text on black, for example, was easily readable at 6 points in my tests and black text on white was easily readable at 5 points. It also does an excellent job of resisting pixel jitter and moire patterns on images that tend to bring both out. Results can vary depending on your graphics card, but in my tests, the image was as rock solid with a VGA connection as with HDMI.

2D Video. Handling detail well is an obvious benefit for HD video too. In addition, the test unit did a good job of avoiding posterization and holding shadow detail, even on our most demanding test clips. I saw some noise, but less that with many models in higher price ranges and only in scenes that tend to cause it. Contrast ratio is a bit low, but it’s obvious only in theater dark lighting. With ambient light in a family room, the benefits of a higher contrast ratio tend to get washed out in any case.

I ran into one odd behavior when I was connected to a Blu-ray player as opposed to a PC or FiOS. Every time I started playing a DVD or Blu-ray disc, the TH670 switched to Bright mode, forcing me to reset it to the mode I wanted. BenQ insists this is by design, but it’s hard to understand why, considering that all of the other modes offer better color quality. In any case, if you want to use one of the other modes, you’ll have to switch to it every time you start a movie.

3D video offers essentially the same quality as 2D in most ways, but with only one color preset. It also does well on those aspects of image quality specific to 3D. I didn’t see any crosstalk and saw just a hint of 3D-related motion artifacts in the most demanding clips.

Rainbow artifacts are a minor issue at worst for the TH670. With data images, the only time I saw any was with one test image that’s designed to make them show. With video, I saw some with clips that tend to bring them out, but less often than with many home entertainment projectors. Anyone who sees these artifacts easily will see them with the TH670, but infrequently enough with most material that it’s unlikely to be annoying. The potential exception is with black-and-white input, where they show more often.

Key Features

Zoom. The 1.2x zoom offers some flexibility for how far you can position the projector from the screen for a given size image.

Small and lightweight. The TH670 measures 5.4″ by 12.9″ by 9.2″ (HWD), and it weighs only 6.6 pounds, making it small and light enough to carry with you or set it up quickly as needed if you don’t have a place to install it permanently.

Useful audio. The built-in 10-watt mono speaker offers usable sound quality and enough volume to fill a typical family room or medium-size conference room.

Full HD 3D. The TH670 offers full HD 3D compatibility, and automatically switches to and from 3D mode as needed. The 3D works with DLP-Link glasses only.

Good Lag time. The 33.1 ms lag time in Game and Bright modes is at least a match for the vast majority of projectors and faster than most.

Security. The menu offers password protection. There’s also a Kensington lock slot on the back and a security bar along the left side.

Warranty. The price includes a one-year warranty for parts and labor and a 90-day warranty for the lamp.

BenQ Th670 Panel

BenQ TH670 Rear Connection Panel

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Acer H7550ST

  • PROS

    Native 1080p resolution. Bright. Short throw. 1.1x optical zoom. Supports 3D for video sources, like Blu-ray players. Comes with two pairs of 3D glasses. Short lag time. Three HDMI ports. Near-excellent video quality.

  • CONS

    Shows rainbow artifacts in video, particularly for black-and-white source material.

  • BOTTOM LINE

    Despite showing rainbow artifacts, the Acer H7550ST is a tempting choice as a home-entertainment projector, thanks to its bright image, a short throw combined with a 1.1x zoom, full 3D support, and a lag time that’s suitable for gaming.

he DLP-based Acer H7550ST delivers a constellation of features—including 1080p (1,920-by-1,080) resolution, a 3,000-lumen rated brightness, and a short throw combined with a modest zoom—that make it a strong candidate as a home-entertainment or low-end home-theater projector. Its Achilles’ heel is that it shows rainbow artifacts just often enough that they could be annoying to anyone who sees them easily. However, it delivers otherwise high-quality video. For those who aren’t bothered by rainbow artifacts, the H7550ST at Amazon is a tempting choice.

Compared with the Optoma and Epson models, the H7550ST is notably bigger and a little heavier, at 3.9 by 14 by 9.5 inches (HWD) and 7 pounds 8 ounces, which makes it more cumbersome to carry with you to a friend’s house for a movie night or gaming. However, it’s still small and light enough that if you don’t have room for installing it permanently, you can store it away and then set it up quickly and easily when you want to use it. Acer even supplies a soft carrying case with reinforced side panels.

Setup

Setup is a little unusual for a short-throw projector. Most short-throw models don’t offer any zoom, which means you have to move the projector when you want to adjust the image size. The H7550ST’s 1.1x zoom gives you some flexibility for exactly how far to place it from the screen for a given size image. However, the cost of this added convenience is that even at its maximum zoom setting, the H7550ST has a longer throw than most short-throw models.

or most of my tests, I set the lens to its maximum zoom setting and used a 90-inch image (measured diagonally) at the native 16:9 aspect ratio, which put the projector 53 inches from the screen. As a point of comparison, the Acer H6517ST, which offers a short throw without optical zoom, delivers the same size image at 38 inches from the screen.

In most other ways, setup for the H7550ST is standard. Choices for image input on the back panel include two HDMI ports, a VGA port, both composite and S-Video ports, and three RCA connectors for component video. As with an increasing number of projectors today, there’s also a third HDMI port in a hidden compartment at the right-front-top section of the projector. The hidden port is meant for a streaming wireless adapter, should you want to use one. Both it and one of the HDMI ports on the back also support MHL.

The H7550ST can also be used with Acer’s WirelessHD Kit , which integrates nicely with the projector. The optional kit includes a transmitter that you connect via HDMI cable to an image source and a receiver that plugs into one of the projector’s HDMI ports.

When the receiver is plugged in, the H7550ST automatically replaces the appropriate HDMI option on its source menu with a WirelessHD option. Choose it, and if the WirelessHD connection isn’t already established, you’ll see step-by-step setup instructions on the screen. The instructions basically tell you to connect the transmitter, plug in its power adapter, and turn it on. Not only is the WirelessHD easy to set up, but it worked flawlessly in my tests, with no noticeable difference between using it and connecting via HDMI cable instead.

Brightness

As with any single-chip DLP projector, discussing the H7550ST’s brightness gets a little complicated, because of differences between white brightness and color brightness. Briefly, unlike three-chip LCD projectors, which have the same brightness level for both, most DLP projectors deliver a lower color than white brightness, which can affect both color quality and the brightness of color images. The difference in the two levels means that the 3,000-lumen rating for the H7550ST may or may not translate to a brighter full-color image than you’ll get with an LCD projector like the Epson 2040, which has a lower rating, but has the same color as white brightness.

As a reality check, in my tests in theater-dark lighting, the H7550ST was too bright at its brightest setting for the 90-inch image that I used. I had switch to Eco mode to find a comfortable level. You can also lower the brightness by choosing one of projector’s predefined lower-brightness settings or by turning off the DLP Brilliant Color feature. Both choices have the added benefit of improving color quality as well.

Performance

Image quality for 2D video is near excellent, at least in Movie and Dark Cinema modes, which offer the best color quality. The brightest mode had a green tint in my tests, which is a common issue for projectors, and some colors in each of the two brightest modes—Bright and Standard—were dark in terms of a hue-saturation-brightness color model, which is expected for projectors with a significant difference between white and color brightness.

Beyond that, the projector did a near-excellent to excellent job on our tests with shadow detail (details based on shading in dark areas). I also didn’t see any motion artifacts or posterization (shading changing suddenly where it should change gradually), even on test clips that tend to cause those problems. I saw some moderate noise in video clips that tend to show noise, but not enough to be an issue for most people.

The H7550ST also does a better job of avoiding rainbow artifacts than many DLP projectors, but it still shows some. I saw them often enough in my tests that anyone who sees them easily will notice them, and may find them bothersome, particularly with black and white source material.

Image quality for 3D video is also near excellent. For those aspects of image quality that both 2D and 3D share, the quality was similar in my tests. I didn’t see any crosstalk, and I saw only a hint of 3D-related motion artifacts. A notable extra for the H7550ST is that it comes with two pairs of DLP-Link glasses. Most projectors don’t come with any.

Two other pluses are the H7550ST’s stereo sound system and short lag time. The two 10-watt speakers offer good sound quality, with enough volume to fill a small family room. If you want better quality or higher volume, you can connect an external sound system to the audio output, or use the built-in support for Bluetooth to connect to headphones or speakers. Gamers will appreciate the short lag time, which I measured, using a Leo Bodnar Video Input Lag Tester, at 34 milliseconds (ms), or a two-frame lag at 60 frames per second.

Conclusion

Be sure to consider the Epson 2040 for its guaranteed rainbow-free images, particularly if you see rainbow artifacts easily and expect to watch much black-and-white source material. Also worth looking at is the Acer H6517ST, which has an even shorter throw than the Acer H7550ST. That said, if you don’t see rainbow artifacts easily or don’t find them annoying, the Acer H7550ST offers a short lag time for gaming, an eminently usable sound system, and a bright image, with near-excellent image quality. Although it costs a little more than the competition, it largely justifies the price by adding a zoom to the short throw, and bundling in two pairs of 3D glasses.

See more Projector Information at https://projectorpro.in.th

Home Theater Projector Brightness, Zoom lenses and Throw Distances

What’s this all about?

When shopping for your home theater projector, of course brightness – lumens, are one of the most obvious specs you see. The interesting thing, is that depending on how/where you set up your projector, brightness can vary by almost double!

That’s right – a projector placed in one position in your room, might do 350 lumens, but placed more optimally, it could produce as much as 700 lumens. Sound easy? Not! There are always trade-offs. Before I get into all of this, let’s be clear up front:

The purpose of this piece is to improve your understanding of the impact of positioning a projector, the lens it has, and your need for achieving a level of brightness. While the information here, may cause you to change some of your installation assumptions, it is unlikely that you will make totally different choices in projector, screen type, or whether you ceiling mount or shelf mount a projector. These decisions will all have some, but minor impact on your overall theater, and its performance.

OK, back to brightness, first, this two to one range of brightness isn’t true for all projectors. The huge shift in brightness occurs with projectors that are exceptionally flexible in placement, by virtue of wide range zoom lenses.

When a projector’s lens is in full wide angle mode (largest image from a given distance), more lumens make it out the lens. In full telephoto, less lumens.

Many projectors for the home, (mostly 3LCD and LCoS types) now offer 2:1 zoom lenses. That is a placment range from closest to furthest, of 2 to 1. Perhaps, for a 100″ diagonal 16:9 screen, that might be from 10.5 feet to 21 feet away.

If you mount it 10.5 feet from the screen, you will get almost double the lumens as mounting it 21 feet back.

There is no straight simple formula, because different lens designs will have some impact on the actual amount of change, but, let’s say that with a 2:1 lens, it will be close to a doubling.

If, on the other hand, the projector has a far more limited lens, say with a zoom ratio of 1.2:1, then, the change in brightness from one “extreme” to the other, becomes minimal, and not a serious consideration.

Now, most of the DLP projectors have limited zoom lens (1.1:1 to 1.3:1), so there isn’t much to concern ourselves there, but with the 3LCD, and LCoS projectors, where all of them seem to have at least 1.5:1, and most are around 2:1, where you place the projector can matter a lot.

Consider, the reason you get a 2:1 zoom on most of these projectors, is to allow the flexibility not just to ceiling mount the projector, but to give you the option of mounting the projector on the rear wall of your room. The projectors with wide range zoom lenses means that probably 90+% of people can rear shelf mount.

And, rear shelf mounting can save money, in terms of length of cables as well as installation costs – as it’s harder to get power to most ceilings, and if you have fairly high ceilings, working up there means ladders or scaffolding. For most, shelf mounting is just plain simpler and less expensive.

For most people that are shelf mounting their projectors, they will find their zoom lens nearer to the middle of the zoom range, or further back. As a result the actual brightness will probably be a little less than we quote, since we measure with the zoom at mid range.


The only reason this may be important, is for discussions of what is bright enough to meet your needs, screen size, type, etc.

If getting more lumens tempts you to ceiling mount, no problem at all. You get to enjoy any extra brightness. Of course there are trade-offs to everything. The closer the lens to the screen, the more optical distortion in the ends and corners (I’m talking very, very minor stuff). There will also be a smaller “sweet spot” for sitting, with higher gain screens. For that reason, as an example, Stewart FilmScreen’s Firehawk (which I own), comes in two versions, one for closer in positioning of the projector, and that one has less gain (less brightness back to your eye). Again, its another small difference, but a consideration if you are being thorough. Interesting – you mount closer for more brightness, but then need a screen that is less bright to maintain a wide viewing cone (angle). Overall, closer is still brighter, but such offsetting issues do tend to limit the importance of placement, in terms of brightness.

See more Projector at https://projectorpro.in.th

Epson PowerLite 1985WU WUXGA Wireless 3LCD Projector

PROS

Bright. 1,920-by-1,200 resolution. Supports Miracast and WiDi for easy wireless connections. High quality for both data images and video.

CONS

No 3D support.

BOTTOM LINE

The Epson PowerLite 1985WU WUXGA Wireless 3LCD Multimedia Projector offers excellent image quality, high resolution, and both Miracast and WiDi for wireless connections.

BY M. DAVID STONE

With its 4,800-lumen rating, the Epson PowerLite 1985WU WXGA Wireless 3LCD Projector stands ready to deliver an image that’s both big enough for a large room and bright enough to stand up to ambient light. Add in its WUXGA (1,920 by 1,200) resolution and support for both Miracast and WiDi for easy wireless connections, and it’s of obvious interest if you need a high-resolution projector for a spacious venue and expect to have a variety of presenters who need to connect with assorted laptops, phones, and tablets.

Significantly, the 1985WU Best Price at Amazon is the same list price as the Epson PowerLite 1975W WXGA Wireless 3LCD Multimedia Projector Best Price at Amazon, which is our Editors’ Choice WXGA data projector for a midsize to large room. Aside from resolution and a minor difference in brightness, both offer essentially the same features, so you can choose between them based strictly on the best resolution for your needs.

Both models, for example, will let you show images from two different sources at once on a split screen. They also both support Epson’s control software running on a PC to let you manage up to 50 image sources and show up to four of them on onscreen at once. However, the 1985WU will let you take better advantage of split screens should you need them, thanks to its higher resolution.

One particularly important feature both models share is that they use three-chip LCD engines. That guarantees that they can’t show the rainbow artifacts (flashes of red, green, and blue) that are a potential problem with single-chip DLP projectors. The design also ensures that color brightness is the same as white brightness, which means you don’t have to worry about a difference between the two affecting color quality or the brightness of color images. (For more on color brightness, see Color Brightness: What It Is, Why It Matters.)

The potential disadvantage for the 1985WU is that, as with most LCD data projectors, it doesn’t offer any 3D support, which you’ll find in the vast majority of DLP models. This isn’t an issue for most applications. But if you need 3D, you obviously have to look for a projector that offers it.

Setup
The 1985WU measures 4.9 by 14.8 by 11.4 inches (HWD) and weighs 10 pounds 3 ounces, making it best suited for permanent installation or for room-to-room portability on a cart. The one unusual touch for setup is that if you want to take advantage of a standard Wi-Fi connection—as opposed to Miracast or WiDi, which are both built in—you have to insert a supplied Wi-Fi dongle into a USB Type A connector hidden behind a side panel. Beyond that, setup is standard, with a manual focus and a 1.6x manual zoom.

Using the Society of Motion Picture and Television Engineers (SMPTE) recommendations for theater-dark lighting and a 1.0-gain screen, the 1985WU’s 4,800-lumen rating would make it bright enough for roughly a 265- to 355-inch image (measured diagonally) at the projectors default 16:10 aspect ratio. Even in moderate ambient light, it’s bright enough for a 175- to 195-inch (diagonal) image. You can also lower the projector brightness for smaller screen sizes, by switching it to Eco mode, using one of the lower-brightness predefined modes, or both.

The back panel offers a fairly typical set of connectors, including two HDMI ports, with one that supports Mobile High-Definition Link (MHL), a composite video port, and two VGA ports. Other image inputs include a USB Type B port for direct USB display and for controlling the computer mouse from the projector’s remote, a LAN port for both controlling the projector and sending images and audio over a network, and a USB Type A port to let you read files directly from a USB memory key, connect a document camera, or update the projector’s firmware.

There are almost as many choices for wireless connections as there are physical ports. The easiest to use is Miracast or WiDi, assuming the device you want to connect supports one or the other. If not, and the projector is connected to a network using either the LAN port or Wi-Fi, you can use the Epson iProjection app to connect through an access point on the network. You can also set the projector to allow a direct connection by Wi-Fi instead, and connect directly to it with the app instead of going through an access point.

Image Quality and Audio
Image quality is one of the 1985WU’s strongest points. The projector breezed through our standard suite of DisplayMate tests with impressively good color balance and color quality, and no issues worth mention. It also maintained detail suitable for its high resolution. Black text on white, for example, is crisp and highly readable at sizes as small as 6.8 points, and white text on black highly readable at 9 points.

Video quality is nearly a match for some low-cost home theater projectors. That makes the 1985WU far better than most data projectors for video, and easily usable for long video sessions, or even for watching a full-length movie.

Also very much on the plus side is the audio system, with the 16-watt mono speaker delivering good sound quality at a volume suitable for a midsize room. If you need higher volume, stereo, or still better audio quality, you can easily plug an external sound system into the audio-out port.

BenQ W1070 Home Theater Projector Review

BENQ W1070:  Wow!  3D capable, 1080p, exceptional brightness and the promise of really good color!  Sounds like an expensive projector.  Not true.

Allow me to introduce you to BenQ’s W1070.

BenQ W1070 Highlights

  • 2000 lumens bright – suitable for family/living/bonus rooms
  • 3D Capable
  • Higher contrast for better blacks, than most low cost projectors
  • 10 watts of Audio, audio output
  • Full color management controls, ISF certified
  • Minimal lag times for great gaming
  • Remote control
  • Smart-Eco for energy efficiency (see more below)
  • Very long lamp life (for low cost of operation)
  • New lighter 3D glasses from BenQ (not included)
  • Excellent warranty
  • Lowest priced 1080p 3D capable projector we’ve reviewed so far

The BenQ W1070 is a Light Canon of a projector! Mind you, there’s no official determination of how bright a projector has to be to be one, but I’ve referred, in the past to a number of projectors as light canons, that even in their brighest modes, can’t match this 2000 lumen rated BenQ W1070 even after its calibrated.

This is a single chip DLP projector. A small one. Although you can find a few smaller home entertainment projectors that are smaller (all DLP) I can’t think of a single 1080p LCD projector that isn’t dramatically larger.

Physically the W1070 looks pretty cool, or at least cute! But, it’s the picture that we really care about.

I have yet to see an official price. The projector is just starting to arrive in the US, even though it’s been available in Europe and elsewhere for months. In the EU it’s supposed to be $749 last I checked. It turns out that the official US price is $1099. It’s the lowest cost 1080p 3D capable projector yet to grace our theaters.

The projector is just starting to ship in the US as this is published. 3D Glasses are not included. The official price for the glasses is $79. Even that is a little less than most others.

Contrast, it should be noted, is also a lot higher than most of the competiton, which should indicate respectable black levels for the price. Just don’t expect too much in that regard, as projectors with great black levels are typically at least $2500. It’s less of an issue in a typical family room type environment.

Let’s take a quick look at some bullet point highlight, some specs and then we can get into the meat of this projector review!


BenQ W1070 3D

3D looks very good. Before I get going on the BenQ’s 3D I’ve got an interesting story (cautionary tale) before I go further. I’ve been having problems with one of my long cables of late, ordered in someone’s “top of the line” cables (off of Amazon – I was in a real hurry), and when I put on John Carter in 3D last evening, all kinds of crosstalk and judder. Switched back to that truly (but 5 year old), top of the line cable – an Ultralink, and all that garbage went away. I confirmed that the problems also were there when I switched to an expensive JVC projector. BTW the issue was with Blu-ray 3D, side-by-side off of HDTV didn’t seem to suffer.

If you think you are the type who will upgrade in a couple of years (maybe to a 4K projector when they become affordable), that’s a killer reason for buying really good cables.

Back to the 3D performance. With a proper cable, crosstalk is a non-factor. I found watching 3D to be rather enjoyable and relatively bright. Color was pretty good (in 3D), I don’t expect color as good as 2D, and we have never tried to calibrate 3D.  The excellent brightness allowed me to put on some widescreen movies and fill my 124″ diagonal.  Not bad, watchably bright.  At 100″ diagonal there’s plenty of lumens for 3D.  After all, consider that 400 lumens is more than enough (with proper lack of ambient light) to watch a 100″ screen.  With over 1700 lumens calibrated, that’s more than 4 times as much.  3D no longer costs 75% of brightness even if it does cost viewers a good bit more than half the brightness.  Translated, this W1070 can do a great job in 3D on an average sized screen.

I was very pleased with HDTV 3D.  Everything from a Penn State football game, and some little league baseball I recorded in 3D, to a National Parks tour of Arches, looked really good.

Color remained good even in 3D.  Of course we never attempt to calibrate 3D, so I’m sure it could be improved.  If we find a 3D calibration disc, at some point I’ll have Mike calibrate some 3D modes on future projectors.

Overall, very good 3D, lots of brightness, and an almost total lack of rainbow effect  (for me) make this W1070 the best lower cost DLP projector for 3D that I’ve played with.

In other words:  I really like it!

– See more at: https://projectorpro.in.th

Acer K335 LED Portable Projector Review

The Acer K335 is a versatile WXGA (1280 X 800) DLP pocket projector with enough light output to deal with less than ideal lighting conditions despite its small size!

Acer K335 Projector Highlights

  • Small and Lightweight 2.87 lbs
  • Good light output with near to 700 lumens (measured)
  • HDMI and Analog VGA inputs
  • Supports MHL for use with compatible MHL equipped mobile/portable devices
  • Ability to display from iPads – iPhones (w/ iOS 5.0 or later) and Android tablets – phones (w/ Andorid 4.0 or later) with optional adapters/cables and ‘eDisplay’ App software
  • Can play media files from SD cards or USB flash drives
  • 3D capable for computer-based 3D sources (not Blu-ray 3D compatible)
  • Built-in mono speaker suitable for use in small conference rooms
  • Can support wireless (Wi-Fi) input with an optional adapter
  • Short lag times make the model suitable for gaming

Acer K335 Projector Overview

The Acer K335 projector is a WXGA (1280 X 800) DLP projector that offers an increase in light output from the earlier Acer K330 model  The K335 has  a similar size, weight and control layout as the K330.  However, the new model has a somewhat different front panel layout for the lens and IR remote sensor while the rear panel connector layout is very similar to the earlier model  The K335 is rated to 1000 lumens, which is double the rated light output of the earlier K330 model.  In our tests neither the K330 nor the K335 were measured to produce the manufacturer’s rated light output, but the K335 is significant brighter than the K330, as well as producing more lumens of light output than most other competitors LED portable/pocket projectors.  This makes the K335 a very versatile pocket projector that offers adequate light output to deal with less than ideal lighting conditions.  The K335 LED light source is rated to last 20,000 hours, which is typical for recent LED-based portable projectors.  The K335 has a fixed lens, with no optical zooming or optical lens shift.  It does offer a digital zoom function but this simply enlarges a portion of the image and is not a substitute for an optical zoom lens.  As a result, the K335 will need to be  placed at the proper distance from the screen in order to obtain the image size desired.  Also it will need to be positioned at the proper height relative to the screen, if use of digital keystone correction is to be avoided.  When the ideal projector height (relative to the screen) cannot be provided the K335 has very good automatic digital keystone correction to facilitate setup.  The works thru the K335 having an internal tilt sensor that applies the correct amount of keystone correction within a couple of seconds after the tilt of the projector is changed.  The K335 has a throw ratio of approx. 1.25:1 meaning with a projector-to-screen throw distance of 8 feet (96 inches) the image will be about (96/1.25=) 76 inches wide.  Note this the width of the image and not the diagonal size.  The K335’s rear panel offers connection for the most common video inputs, including HDMI, VGA and composite video as well as an analog audio input.  It can also project from a USB thumb drive, an SD card, from an iPad /iPhone (w/ iOS 5.0 or later and with optional adapter), or from Android tablets/phones (w/ Android 4.0 or later).  The K335 has provisions for displaying not only photos, video and audio files directly from a USB or SD memory card, but the K335 can also display Microsoft Office documents.  This capability for PC-free presentations could be a useful feature on a portable mini-projector for the ‘road warrior’ that likes to travel light

There is also a built-in three watt speaker that is adequate only for small rooms, but fortunately, there is also an audio output jack for use with amplified external speakers. The K335’s light weight and compact size makes it a good choice for traveling.  Like many other small, portable projectors the K335 does not have a battery option, but with the relatively high light output of the K335, a battery option is probably not feasible.  Unlike some other small portable projectors, the K335 has its power supply is built in, so it only uses a standard power cord, thus improving its portability.  The K335 also comes with a nice carrying case with a front pocket just large enough to accommodate the remote control, power cable and a couple small accessories (e.g., memory card, HDMI cable).  The Acer K335’s combination of fairly high light output (for this class of projector), decent contrast, acceptable color accuracy, long LED light source life, and modest price will appeal to those in the market for a pico or pocket projector for business use, but need more lumens of light output than is found in many projectors in this class.


Acer K335 Special Features

20,000 Hour LED Life – The Acer K335 uses an LED light source that is rated to last 20,000 hours.  This is likely longer than the life of the projector

Presentations from USB flash Drive, SD Card, iPhone/iPad/iPod or Android tablet/phone – The Acer K335 has built-in ports allowing for presentations from a USB flash drive or SD memory card.  Through the use of an optional adapter, the Acer K335 can present photos and videos from iPhone/iPad/iPod or from an Android tablet or phone.

Display of Microsoft Office Documents -The K335 can directly accept Word, Excel and Powerpoint files from a SD memory card or USB drive and project the contents of the document.  The allows for MS Office documents to simply be loaded into the projector from a flash memory drive (USB or SD card) without the need to connect a PC to the projector.  The Acer documentation does not specifically indicate which versions of MS Office documents are supported.

Game Ready – The Acer K335 has ‘Game’ mode and along with a relatively short lag time make this model suitable for gaming.

3D Ready – The Acer K335 is 3D ready via its implementation of DLP Link.  It can only accept 3D from a suitably equipped source (e.g., PC) that is capable of providing 3D in a alternating frame mode.   The K335 is not compatible with the most common 3D video signal formats that are used with Blu-ray Discs and for 3D channels distributed by satellite or cable TV services.  The 3D capabilities of the K335 were not evaluated for this review.

Support for Wireless Input – The K335 supports a WiFi input with the addition of an optional Wi-Fi adapter.  The Acer Wi-Fi adapter was not provided with the review unit and as a result the Wi-Fi capabilities of the K335 were not evaluated for this review.


Acer K335 Color & Picture Quality

Two different video sources were used to evaluate the color and picture quality of the Acer K335.  To evaluate the projector’s performance for displaying business presentations and documents, I used my laptop PC connected via HDMI to the K335.  For evaluating the projector’s performance for displaying video I used a Blu-ray Disc player connected to the Acer K335 via HDMI.


Acer K335 Projector – Readability

For the initial tests the input from the laptop PC was set to the Acer K335’s native resolution (i.e., 1280 x 800).  This is expected to result in the best case sharpness for displaying text for business presentations since the projector does not need to apply any video processing to scale the image to the projector’s display resolution.  With this type of input the K335 provided a nicely sharp image and even the very small 8-point type being fully legible.

The K335 offers an assortment of projection modes and I felt for business presentations the “Standard” mode offered a reasonable trade-off between the somewhat conflicting goals of desiring the maximum light output and also desiring accurate colors.  Unfortunately, in “Bright” mode (which was by far the brightest mode), colors were significantly worse than they were in “Standard” mode.

The photos taken from the screen show the K335’s relative good performance for displaying text.  The first photo is a full screen image while the second, third and forth photos below are close-ups showing the projector’s ability to display the smaller text fonts.  I would note there was some color fringing visible when viewed up close and this is due to modest amount of chromatic aberration being introduced by the projector’s lens.  This amounted to a maximum of about a half pixed offset between the green and red color components.

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Shelf Mounting Home Theater Projectors – Pros, Cons, and General Issues

Which home theater projectors can be shelf mounted

That’s a pretty easy question to answer. The first rule of thumb is this, if you want to shelf mount your projector, you’ll almost certainly need a projector with adjustable vertical lens shift. This assumes you want to put the projector on a shelf in the back of your room – and I mean set it on a shelf – not mount it inverted, or anything else unusual.

To be more specific, short of listing dozens of projectors, let’s just say, that virtually all but three or four 3LCD type home theater projectors can be shelf mounted.

LCoS projectors designed for home theater (JVC, Sony), also  all have vertical lens shift (not not necessarily “business LCoS” projectors like some Canon’s which sometimes find their way into home theaters).

And that brings us to DLP projectors. Few DLP projectors


offer lens shift, and therefore few can be shelf mounted.

For example, although Optoma has an extensive line of home theater projectors (more models than anyone else), all are DLP, yet you would be hard pressed to find one projector sporting adjustable vertical shift.

BenQ, on the other hand, offers lens shift in most of its home theater projectors, with it only absent in a couple of entry level models.


Why is Lens Shift critical to shelf mounting a projector

First, let me advise of an exception. You can shelf mount any projector that lacks lens shift. However, those projectors all have “fixed” lens shift, that determines exactly where the projector must be placed vertically, relative to the screen. Since projectors lacking adjustable lens shift, tend to be designed to be even with the bottom of the screen, or even lower, then to shelf mount one of these projectors, you are normally going to have to have that shelf between about eighteen and forty inches above the floor, depending on the projector model, and how far down your screen comes.

Mounting that low, doesn’t work for most people, as seating and other things normally get between the projector and the screen. Still, it is possible!


With variable lens shift, a projector typically defaults to having its lens even with the center of the screen vertically, and the “variable” aspect allows the projector to be placed higher or lower, as the adjusting the lens shift moves the image, up or down on your screen.

Most projectors with variable lens shift, have enough to allow the projector to be anywhere from even with the top of your screen, to even with the bottom. Those with more range, may even have enough to allow the projector to be a full half screen height above (the top) or below (the bottom) of the screen. For an example, if you have a 100″ screen, that would mean that the projector could be as high as about 25″ above the top, or 25″ below the bottom of the screen – or, of course, anywhere in the middle.

My own theater has my projector mounted about even with the top of the screen, a very typical setup.


Why Shelf Mount your Home Theater Projector

Assuming you want a fairly permanent installation, your choices are basically – shelf mount or ceiling mount. Each has its advantages, however, essentially all projectors can be ceiling mounted, whereas slightly more than half of all home theater projectors (my best guess) can be shelf mounted.

The advantages of shelf mounting are as follows:

1. Usually lower installation costs. This is due to several things, first, many ceilings don’t have any power, so power has to be brought up to a ceiling mount. By comparison, most walls do have power readily accessable, so it’s just a matter of moving the power up the wall a few feet.


The other thing is that you will probably need shorter cable runs if shelf mounting. That’s not always the case, but typical.

2. Not all ceilings have access above them to allow easy running of cabling. (I know this nightmare – I previously ceiling mounted projectors until a couple of years ago.) Running through walls is – well, running through walls – Standard Operating Procedure.

3. With ceiling mounting, the projector, the ceiling height and the size and height of the top of your screen all determine where the projector can be mounted. With high ceilings, typically your projector will hang down a bunch of feet on a pole. In my room, for example I had about a 6 foot pole with the projector at the bottom. It wasn’t pretty, and my wife never liked that setup. By comparison she strongly favors the shelf.


Shelf mounting often is easier for doing maintenance, such as cleaning filters, or replacing the lamp. This is especially true for lamp replacement, as perhaps half of all home theater projectors (although few of the more expensive ones), do require unmounting from a ceiling mount, to change the lamp. And, not only is that a hassle, but then you have to remount and carefully reallign the projector – basically a pain in the butt!


Downside to Shelf Mounting Your Projector

1. Audible Noise! Where are you sitting? If your room is pretty squarish, you are likely sitting not very much forward of the back wall. This would mean that you are sitting close to directly under the projector. And that means projector fan noise may be an issue. (A good reason for placing the shelf up very high. On the other hand, if you sit well forward, fan noise should not be an issue. (If you are ceiling mounting, in such situations, in the first case, the projector is probably well in front of you, and therefore quieter, and in the second case, you might be right under the projector.

Note: If you are pretty much sitting under the projector, you might want to make the shelf larger than necessary to block out any direct path for noise coming directly from projector to your ears. (Putting some sound absorbing material on the shelf, can further reduce fan noise.

2. Simply said, a back shelf is as far away as you can get a projector from the screen, in your room. That normally means having the zoom lens somewhere between fully telephoto, and in the middle of its range.

The bottom line, is that projectors, when shelf mounted, aren’t as bright as when ceiling mounted closer to the screen.

With today’s home theater projectors with 2:1 zoom lenses or more (that includes all Panasonic, Epson, and Sanyo HT projectors, to name a few, that means you are giving up lots of lumens. With a 2:1 zoom lens, in full telephoto (typically about 20 feet from a 100″ diagonal screen), most home theater projectors deliver anywhere between 55%, and 65% of the brightness to the screen, that they would if in the closest position (typically about 10 feet from a 100″ screen).

The bottom line, is that when ceiling mounting, you are normally closer to the screen, and therefore get more lumens, and it can be a rather significant difference.


Is it practical to shelf mount any projector with vertical lens shift

No, it’s not. Your room may not be the right shape – the room too long for the size screen, so you can’t mount the projector as far back as your wall. Fortunately most 3LCD and LCoS projectors have zoom ranges around 2:1 or just a little less. Off the top of my head, I can’t think of any lens shift equipped 3LCD or LCoS, with less than 1.5:1. (I’m strictly talking home theater projectors here, not business ones.)

Thanks to these zooms with such wide range between closest and furthest away positions most people can shelf mount.

DLP projectors again, tend to be the exception. BenQ, who offers variable lens shift on their PE8720, W5000, W20000, and other projector’s has lens shift that will allow vertical placement anywhere between top and bottom of the screen, but their zoom lenses range varies between only 1.15:1 and 1.35:1, basically just a few feet of placement flexibility at most. Fortunately, the zoom lenses on the BenQ’s are fairly long throw, to accomodate the typical room size/distances for shelf mounting, but a much higher percent of owners of these, will not be able to shelf mount. (I for one had the BenQ PE-8720, and was able to shelf mount it, thanks to having a very large screen, which allowed the projector to be pretty far away.)

With a BenQ, or other DLP with limited zoom range, if shelf mounting is what you want, you will have a greater chance of being able to do so, if you are flexible in terms of the size of your screen – you just might have to go a size or two larger or smaller than what you might have picked, to allow that projector to be the necessary distance away.


What else do I need to know about shelf mounting my projector

First, remember as you figure out the placement, that specs provided by manufacturers (unless otherwise pointed out) are based on measuring from the front of the lens, to the screen, not from the middle or back. Since that can be as much as a 2 foot difference, pay attention.

Next, ventillation is important. Different projectors will have different recommendations, but generally, you’ll want to have at least 5-6 inches of clearance in the back. All shelf mountable projectors vent hot air out the front (typically at an angle, or the sides), to help out.

Don’t stick your projector on a bookshelf, etc., surrounded by other things, ventillation is very important to longetivity of your lamp and your projector. That said, stuffing it in a shelf surrounded by books won’t work for long anyway, most likely the projector will just overheat quickly and shut down.

If you are doing a shelf, and are concerned about heat, drilling large holes or placing other cut-outs on the shelf to allow more ventillation is always a good idea, but probably not necessary. The shelf I use is about 30×24 inches (30 wide), and I’ve had no problems with either my old BenQ, or my current JVC RS1 (both rather large home theater projectors.) I’ve always managed to provide just barely 6 inches in the back for the cables, and for air to circulate, and I’ve never had a heat related shutdown, etc.

Since you are using lens shift, the projector should be perfectly level, both horizontally and vertically – essentially perpendicular to the screen. That will allow the lens shift to maintain a rectangular image. If the projector is tilted at all, you end up with more of a trapazoidal shape.


Calculating projector lens shift

Virtually every projector with lens shift will have a table in it’s manual that will tell you the vertical (and if it has horizontal lens shift), and horizontal placement range. For example it might say for a 100″ screen, that the offset is 16.5″ maximum, which would mean the maximum height of the projector would be 16.5″ above the top of the screen surface. Other manuals, however may just provide a formula – easier for odd sizes, but requires more thinking on your part to translate.

One thing of importance to remember. With most projectors vertical and horizontal lens shift severely affect each other. To get the maximum vertical lens shift, you can’t use any horizontal shift, and vice versa. Fortunately few use horizontal lens shift at all, except for fine work – an inch or two if the projector’s placement was not correctly calculated (such as forgetting that its lens is mounted off center, and centering the shelf to the screen).

Therefore, if you will be needing most of the vertical lens shift, try to place that shelf so that the lens is dead center – left to right – with the screen, so as not to waste your flexibility on horizontal lens shift.


If I’m shelf mounting and using lens shift, do I need to invert the projector

No, there is not normally any reason that makes you flip the projector, if it has vertical lens shift. The only possible exception that I can think of, is on rare occasion, you may find a projector with a lot more shift above, or below, the center point, than the other direction. In that case, you could, conceivably find an installation where you want to mount, say, very high, but the only way to get up that high is if the projector is inverted. More likely though, it would be the other way around, most manufacturers, I would think, if not offering the same amount of shift in both directions, would have more shift to the top.

Mind you, that doesn’t mean you can’t mount the projector inverted, under a shelf. I seriously considered that last year, when buying my JVC. the JVC outputs about 900 lumens maximum in brightest mode, and I decided when I bought it, that, if it wasn’t as bright as I wanted for sports viewing, I would seriously consider mounting a Panasonic PT-AX100U (now the AX200u), inverted to the bottom of the shelf. JVC on top, Panasonic underneath. The Panasonic would give me twice the lumens. Fortunately, that wasn’t necessary.


Bottom Line

For most folks, especially when adapting an existing multi-purpose room (family room, living room) to do double duty as a home theater, shelf mounting is often the preferred solution. Typically it will save money, and effort in terms of the overall installation, and provide (brightness notwithstanding), performance at least as good as with ceiling mounting.

These are the basic issues. One smart move, is to figure out, up front, whether you want to/need to go with a shelf mount, as it will quickly help you narrow your projector choices. And, anything that quickly helps you choose between a whole bunch of good projectors in your price range, is generally, a very good thing!

For More Information and Projector order at https://projectorpro.in.th

LCD projector

An LCD projector is a type of video projector for displaying video, images or computer data on a screen or other flat surface. It is a modern equivalent of the slide projector or overhead projector. To display images, LCD (liquid-crystal display) projectors typically send light from a metal-halide lamp through a prism or series of dichroic filters that separates light to three polysilicon panels – one each for the red, green and blue components of the video signal. As polarized light passes through the panels (combination of polarizer, LCD panel and analyzer), individual pixels can be opened to allow light to pass or closed to block the light. The combination of open and closed pixels can produce a wide range of colors and shades in the projected image.

Metal-halide lamps are used because they output an ideal color temperature and a broad spectrum of color. These lamps also have the ability to produce an extremely large amount of light within a small area; current [1] projectors average about 2,000 to 15,000 American National Standards Institute (ANSI) lumens.

Other technologies, such as Digital Light Processing (DLP) and liquid crystal on silicon (LCOS) are also becoming more popular in modestly priced video projection.

Projection surfaces

Because they use small lamps and the ability to project an image on any flat surface, LCD projectors tend to be smaller and more portable than some other types of projection systems. Even so, the best image quality is found using a blank white, grey, or black (which blocks reflected ambient light) surface, so dedicated projection screens are often used.

Perceived color in a projected image is a factor of both projection surface and projector quality. Since white is more of a neutral color, white surfaces are best suited for natural color tones; as such, white projection surfaces are more common in most business and school presentation environments.

However, darkest black in a projected image is dependent on how dark the screen is. Because of this, some presenters and presentation-space planners prefer gray screens, which create higher-perceived contrast. The trade-off is that darker backgrounds can throw off color tones. Color problems can sometimes be adjusted through the projector settings, but may not be as accurate as they would on a white background.

Credid : wikipedia

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