Edition 4 of “This May Be a Dumb Question, but…”

This Blog Series is written by Exertis Almo's Business Development Managers: 
Ashley Nichols, CTS, DSCE, and John Borns, CTS, DSCE.

Welcome to our 4th and final issue focusing on projection topics. The most commonly asked questions we receive to have do with determining screen size, throw ratio, and brightness. We’re going to attempt to tackle those here today. To get here, we first wanted to make sure that you were knowledgeable enough to be dangerous when it comes to picking out screens and determining which TYPE of projector you need. If you’re coming in late on this, see our previous posts – edition 2 or edition 3WARNING: This may take a teensy bit of math, so get out your scratch paper!

FIRST UP: We need to understand aspect ratio.(1)

Simply put, aspect ratio is the relationship between the width and the height of a screen. It’s critical to know this so that we can ensure that the shape of projected image fits neatly within the screen. Every projector has a native aspect ratio, so ideally, you can pair a screen and projector with this information. Fortunately, this isn’t too much of a challenge, as MOST modern professional projectors can be programmed to support all sorts of aspect ratios. Why is this? Basically, the projector needs to be able to support anything you plug into it (computers, Blu-rays, you name it). Additionally, projectors don’t have the same lifespan as screens, so it’s very likely that you will need to match a new projector to an old screen. If someone took down the old projector and punted it into the sea before you had chance to know what it was, you can confidently install a new projector and trust it can adapt to the screen. Below are some common aspect ratios, and more specifically, the most common aspect ratios you will see in projection are 16:9, 16:10, and occasionally still a 4:3. The others are more commonly seen in LCD’s, gaming monitors, IMAX, etc., so we will ignore them for now.

ASPECT RATIO POSSIBLE RESOLUTIONS OTHER FORMS YOU WILL SEE
32:9 3840×1080, 5120×1440, 7680×2160 DFHD, DQHD, 32:9, DUHD
21:9 2560×1080, 3440×1440, 3840X1600, 5120×2160 21:9 Ultrawide
16:9 1280×720, 1366×768, 1600×900, 1920×1080, 2560×1440, 3840×2160, 5120×2880, 7680×4320 HD, FHD, 4K UHD, 8K UHD
16:10 1280×800, 1920×1200, 2560×1600 WUXGA, WXGA, WQXGA
4:3 1400×1050, 1440×1080, 1600×1200, 1920X1440, 2048X1536 XGA, SDTV

*Note: ‘other forms’ does not encompass all possibilities, just some of the most common forms

To calculate Aspect ratio when you aren’t sure what you have, the formula is Width divided by Height (W/H=AR). For example, pretend you have a screen that you measure and it is 125” wide by 70” high. 125” divided by 70” is 1.777. BEFORE you say, “Ashley, that is NOT on this list of aspect ratios!”— here is a handy tool to convert to nomenclature that is more common:

ASPECT RATIO ALSO ASPECT RATIO
16:9 1.78:1
16:10 1.6:1
4:3 1.33:1
21:9 2.33:1

These calculations MEAN the same thing: for every 16 units wide, there are 9 units high, or for every 1.777 units wide, there is 1 unit high. If you’re using an old fashioned calculator on your desk instead of some of the calculation tools out there on the World Wide Web, then you will see these decimals and can easily convert over to the more commonly used terms on the left.

SECOND UP: Throw ratio.(2)

Why do you need this? Well, if the aspect ratio is making sure you have the right shape of screen, the throw ratio will help make sure you have the right lens on the projector in relation to where you are mounting it, so that your image fills the screen to your liking. To calculate the throw ratio, you divide the distance from the projector by the width of the screen (D/W=TR). For example, you have 10.42 ft wide screen and you are mounting this bad boy 15ft away, you take 15ft/10.42ft= 1.439. Your throw ratio is 1.44:1, and you find the lens that fits that.

An important reminder is to make sure that you convert feet to inches (or vice versa) when doing your calculations. I’m commonly ask to recommend a screen for 125” wide screen that’s being mounted 15’ away. It would not look great for me to recommend a 1875:1 lens here – which is what you get if you don’t convert 15 feet into 180 inches. More commonly, I get requests such as, “I want to use XYZ projector, I have 164-inch diagonal screen and am mounting this 15ft away: which lens do I need?” I don’t know the width, but I do know the diagonal, so I can either ask for the width to be exact, or I can head over to this tool: http://screen-size.info/, pick out the Aspect Ratio, and find the width. If they give you another bit of info, like the height, then you can dig in the recesses of your brain and use the Pythagorean Theorem to manually calculate the width, but around here, we work smarter, not harder, so feel free to use the cheater tool.

LAST, not least (& probably the most difficult to calculate): How bright do I need my projector to be?

Why do I say this is harder to calculate? Because there are a lot of different variables in the room that affect the ability to see an image, and also, it’s subjective. If you have great eyes and can see the image just fine but someone who struggles a little more can’t make out the details, then that projector probably isn’t bright enough for the space or is even too bright (see Washout from edition 3), even if you think it is fine. There are general standards out there that can be adhered to, though, so we will go over those here briefly and you can build on that knowledge later with more research, if you want. If you read editions 2 and 3, then you have heard us say that projector brightness is measured in Lumens. You may see ANSI Lumens or Center Lumens, and these can be different numbers. Why is this? ANSI Lumens are defined by the American National Standards Institute, and “measures the overall amount of light the projector delivers.” Center Lumens just measures the “center spot,” which is likely the brightest spot on the screen, since no projector can deliver uniform brightness across the entire screen, so “center lumens” is likely a higher number than ANSI lumens. I wouldn’t say that one is better than the other, and neither can the industry at large, because you will see different people duke it out over why they prefer one to the other, but just note that they are different.

Ok, so, where am I going with this? You just want to know how bright the projector needs to be, and I’m giving you a vocab test. Well, bear with me, because here is one more term that I need you to know, and that is Foot lamberts. 👣 Yes, this is a real term. Once you’re finished chuckling, here is why you need to know what they are: these help you determine if the placement of your projector creates a viewable image in your room. By following these guidelines, you can determine if you are going with the 5,000 lumen projector or the 7,000 lumen projector. To do so, the formula is (Projector Lumens ÷ Screen Area) x Screen Gain = ftL

FOOT LAMBERTS AMBIENT LIGHT EXAMPLES
16 – 29 Dark Room Home theaters
30 – 39 Low Ambient Light Darkened rooms, no windows, etc.
40 – 59 Medium Ambient Light Classrooms, well-lit conference rooms
60+ High Ambient Light Auditoriums, lecture halls, etc.

The previous chart will help you determine if you are in the right ball park for brightness. Let’s pretend you have a 220” screen with 1.0 gain (see edition 2 where John talks about screen gain) in a lecture hall, and you got a great deal on a 7,000 lumen projector. Will it work? (7,000 lumens / 150sq.ft ) x 1.0= 47 ftL. Assuming the auditorium is well lit and has a lot of ambient light, this is probably NOT a good fit for the space. Something in the 9,000 lumens or more range would be better suited because it is 60ftL or more.

There are handy calculators out there on the web to assist you in this math so you don’t have to keep doing it yourself, but the next time someone comes to you asking for a suggestion, if you have bits of this info, you can help narrow down their search, and more importantly, be the hero!

Vocab Test Time!

Are these the most detailed definitions? No – we are not a dictionary, nor the AVIXA CTS Prep book. Will someone message us after still telling us how much we missed? Possibly. Will these get you a basic working knowledge of these terms and why they matter? We hope so. Plus, we are 99% sure they will help you shave a few strokes off your golf game. ⛳

  1. Aspect Ratio – the relationship of the height and width of your image (i.e. 4:3, 16:9, 16:10). Essentially, describes the shape of the screen.
  2. Throw Ratio – the relationship of the distance from a projection screen and the width of the screen. If you have these two pieces of information, you can easily calculate your throw ratio to determine which projector lens you need if a manufacturer doesn’t have a lens calculator on their website.
  3. Foot lamberts – Yes, this is a real measurement. Essentially, it is a unit of measurement used to determine how bright you need your projector to be. If you want to get more technical, it is equal to one circular candela per square foot (if this seems like a silly term, take it up with the Society of Motion Picture and Television Engineers who use it).
  4. Frank Lambert – Patriarchal figure in the Emmy Winning show ‘Step by Step.’

Thanks for Reading and Asking Your Questions!

Do you have more ‘dumb’ questions? Share your questions here and we will get you an answer.

Did you find this blog post helpful? Connect with us and #TeamExertisAlmo over on LinkedIn.

Ashley Nichols, Dir BizDev

Ashley Nichols | CTS, DSCE

Director of Business Development

 

Supported Manufacturers: Sony

John Borns, BDM

John Borns | CTS, DSCE

Business Development Manager

 

Supported Manufacturers: Legrand AV (NE, SE, MW) – Chief, C2G, Da-Lite, Luxul, Middle Atlantic, Vaddio, Wiremold

Much more to Barco than ClickShare and Projectors

barcocsc-4My impressions 60 days after adding Barco to my Business Development Manager responsibilities: there is much more to Barco than ClickShare and projectors. This includes video walls, image processors, video switchers, and beyond. Similar to ClickShare, design elegance and sophistication is consistent. Yet, recent price moves and promotions in some categories keep the products within reach of their target markets.

ClickShare is still the most popular Barco solution at Almo. If you have not seen ClickShare yet, check out this video (1:15). Customer’s love the simplicity of wireless screen sharing, knowing meetings will run smoothly, and that ClickShare does not require connection to a corporate network (although it is an option). As a bonus, the savings compared to a matrix switch, scaler, and table connectivity are significant.

Since ClickShare creates its own wireless connection in the Wi-Fi band, the integration questions that come up the most relate to managing multiple units in a crowded Wi-Fi space. There a numerous successful installations with literally hundreds of ClickShare units in the same facility and that work glitch free. Much has been written on the subject including white papers and user guides, but some of the high points include:

  • ClickShare allows you to manually set the Wi-Fi band, channel, and power of each unit. This allows you to alternate channels between adjacent spaces, dial back power if necessary, and minimize potential interference in a crowded wireless space.
  • Change the default SSID and name of each unit to something logical (i.e. the room name).
  • Room-specific connection instructions (with SSID) appear on the welcome screen – reducing questions on how to connect.

There are flexible security options making it easy to share content while keeping malicious outside content from hijacking a meeting.

If you have not experienced ClickShare first hand, or would like to dive deeper into configuration options, contact your Almo representative for a 21-day demo loaner unit. Nothing compares to first-hand experience.

Laser Projectors – A Game Changer

z9870u_fcs-our_690x460While lampless projectors are not brand new, the technology has evolved and continues to improve as time goes on.   Imagine an installation grade projector that can run 24/7 with virtually no maintenance and no lamp changes and carry a three year warranty.   Imagine not waiting for your projector to warm up or cool down, where the projector will reach maximum brightness and turn off almost immediately. Combine this with advanced features like projection mapping, edge blending, and an HDBaseT input packaged in a bright enough projector for large venues and you have quite a value proposition for your clients.

Laser projectors offer several benefits over traditional lamp based technologies. Let me clarify that laser simply refers to the light source, so the projection technologies like 3LCD are still a major part of these new projectors.   Traditional lamp based projectors require the lamp to be replaced roughly every 1500 to 6000 hours depending upon the projector and the mode you run it in, while the average lifespan of a laser based projector is 20,000 hours.

Additionally, with most traditional lamp based projectors it takes a few minutes for the projector to warm up after powering on, and can take up to thirty minutes to provide a stable brightness level and often need to remain plugged in after powering off in order to properly cool the lamp.   With laser based projectors they are ready to go almost immediately after being powered on and do not require a connected power source upon powering off with no worry of damaging the projector’s light source.

As far as the light source, projector lamps lose most of their brightness in the first half of their lifecycle whereas with a laser based light source the brightness loss is linear over the 20,000 hour lifecycle.   What does this mean?   This means that if you compare a laser based projector with a lamp based projector, both with the same light output rating (lumens) that within a very short period of time the laser projector will have the brighter image.   Furthermore, even lamp based projectors with higher light output ratings than a laser based projector will quickly provide a lower light output than the laser projector due to the steep curve in degradation of the lamps brightness.

Epson’s popular Pro G and Pro Z installation grade projectors will soon be joined by the new Pro L series of laser based projectors with multiple choices ranging in brightness from 6,000 lumens to 12,000 lumens and multiple lens options with all of the features that users of the Pro G and Pro Z models have grown to love.   Expect to start seeing these shipping in June of 2016. I know I can’t wait to get my hands on one.

***

For more information on Epson Projectors contact Brian Rhatigan at [email protected] or 888.420.2566 x6546

Projection: Alive and Well

It seems flat panel displays are virtually everywhere these days and have gotten larger, thinner, lighter, and less expensive than ever.   Not that long ago in applications requiring a large image a projector was the natural choice, however as flat panels have evolved you are now seeing them installed where historically it would have been a projector. I am not denying the benefits of using a flat panel display, but there are many reasons why projection would be the way to go.

For starters, let’s look at image size.   Generally speaking 98” is about the largest flat panel that is readily available at this time.   So in instances where an image of larger than 98” diagonal is required, projection becomes the only option to use for a single display device without the complexity of multi-screen video walls.   This is pretty clear cut, but size is not the only consideration.

BuildingOften audio visual components are integrated into high end architectural spaces including corporate board rooms, lecture centers, training facilities, and more where the display device may not always be in use and for aesthetic reasons the client may not want to “see” the technology in the room.   Most projectors are ceiling mounted and generally out of view or can be installed in a lift that can disappear into the ceiling.   Projection screens also can disappear when not in use by recessing flush into the ceiling.

Another key consideration is cost.   While flat panels have certainly become affordable, however once you get up into the larger sizes above 80”- 90” the costs can still be prohibitive in many cases where projection will often be much more affordable.   For illustration purposes consider a 98” professional grade monitor at a cost of $32,679.00 compared to an installation class projector like the Epson PowerLite Pro G 6770WU which is 1920×1200 resolution at 6000 lumens available at a retail price of $5,699.00.

When it comes to unique display applications there are times when a flat panel display is simply not an option.   Think about events where you have projection on floor surfaces or on buildings.   With projection mapping some really unique projects can be pulled off.   A really cool example of this was recently featured in a case study on the basketball arena at Pensacola Christian College using Epson Pro G projectors:

Floor

Both flat panel displays and projectors have their pros and cons, however projection is still and will continue to be a great choice for many display applications.  For assistance in selecting the right Epson projector or to learn more, contact Brian Rhatigan at [email protected] or 888.420.2566 x6546.

Pin It on Pinterest