How Do Projectors Work? Learn Everything You Need to Know

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How Do Projectors Work? Learn Everything You Need to Know

Projectors: What Are They?

Inside the simplest terms, a projector is really a device which uses a series of chips, lenses, color wheels and various other gadgets and gizmos to bring a beam of light and transform it into our favorite movies and TV shows in glorious high definition detail.

It wasn’t always of that sort, though. The consumer projectors of today barely even resemble the initial concept, invented in 1894 by Charles Francis Jenkins. These original models worked by blasting light through celluloid film, and stringing together the images and sounds using methods that seem downright primitive by now.

Modern projectors are considerably more complex both in design and implementation, utilizing several different core technologies to supply a choice of options towards the prospective buyer.

How Do Home Projectors Work?

So how can projectors work?

Well, before we will explain the way in which a projector does what it will, it’s imperative first to understand the three major kinds of home theater projectors you’ll find on shelves in 2017. First there will be LCD (liquid crystal display ) projectors, which use polarized light shone through three liquid crystal panels (one for every primary color ), a prism, a lamp, and also a filter to make your image, which then is “projected” (hence the name ), with the lens.

how does an lcd-projector work

The inside of an LCD projector.

Inside a LCD projector, the very first panel displays the image, and that is split up into its primary colors via a series of dichroic mirrors. When the light is separated, it’s then passed through another LCD panel (second of three ), which recombines the colors by separating the light into your spectra counting on what you need reflected and what’s allowed to obtain through. Each panel shines a special color ; either red green or blue, and sends them the through the last LCD panel which bends the light with respect to the degree of electrical current.

Finally, the final dichroic mirror combines the red, green, and blue images straight into the complete picture, and that is magnified using a the onboard lens and shone onto your residence theater’s screen.

DLP, or Digital Light Processing projectors however depend on what’s referred to as a DMD chip. These “Digital Micromirror Devices” string together millions of tiny little mirrors on one chip, each measuring lower than a 1 / 5th of the human hair across.

Doing work in unison, DMD chips utilize the mosaic effect to display one color on each mirror, which got there after being shone through via a rapidly spinning color wheel which alternates between all three. Each mirror represents one pixel (over 2 millions mirrors on the 1920 x 1080 projector, for instance ). If viewed up close wouldn’t seem like anything, but once viewed from far away (or magnified using a giant lens ), they create an entire picture of what you’re supposed to become taking a look at.

Last, there’s LCoS, the most recent from the bunch. Short for Liquid Crystal on Silicon, this technology is both the foremost expensive and the majority complex type of projector to manufacture. So complex, actually, explaining how it actually works takes up a few thousand words by itself, but for the benefit of this guide we’ll break it right all the way down to methods.

It’s kind of a hybrid between DLP DMD and 3-chip LCD technology
Many owners agree that the colour reproduction and clarity on LCoS projectors is far superior to that of either of their predecessors
Nevertheless, additionally it may suffer from motion blur issues where DLP might otherwise not.

What Does “Throw” Mean?

Regardless of how the image gets created inside the projector, all three styles inevitably push light via a lens as the last section of its journey.

How far the light has to reach in an effort to create a particular sized image is the “throw” distance, separated into three categories : short-throw, long-throw, and extra short-throw.

Most projectors you’ll understand there make use of a long-throw lens, and that is smaller and creates a narrower depth of field in its image. This means you should use it to make larger images, but you‘ll need lots of available distance involving the screen or wall to get there.

Short Throw vs. Long Throw

The shorter the “throw” of a lens, the less distance the light has to travel to create the same size image.

Short-throw lenses are larger and produce a shallow depth of field, which suggests you are able to replicate a similar size image often from only half the distance as an extended throw.

Lastly there will be ultra short-throw projectors. These models are considerably more costly, but also can display images upwards of 100″ across from lower than a foot 5 away. If you’re inside a box-sized apartment or are just looking to found out an epic pillow fort, the increased cost (expect to invest no lower than $1, 000 for the ultra short-throw ) could be worthwhile, but otherwise you’re more contented going having a regular short-throw instead.

LCD vs. DLP vs. LCoS

Like all home theater product, whether it’s an LCD, DLP, or LCoS projector, there will be benefits and drawbacks to using each particular technology. Many are more costly than others, and also have different optimal use scenarios counting on the kind of media you consume most.

If you’re a gamer and need the quickest response times possible, LCoS projectors will blow the competition clean from the water. If you’re more curious about richer colors on the budget, DLP is an effective choice, while LCD projectors could be brighter compared to the sun in case you really begin to crank in the lumens.

Wrap Up

Projector technology made a great progress way since Charles Francis Jenkins first gathered his family and friends all around the first projector over a century ago, but this process of movie-enjoyment remains perhaps one of the best methods you will get the full-sized theater experience coming from the comfort of your couch.

Inch-for-inch, all projectors remain a bargain compared as to the you’d pay for any LED or plasma screen of an identical size. So long as you’ve got the space to line them up, projectors could be perhaps one of the best (and the majority bombastic ) methods to enjoy your favorite Hollywood blockbusters in your own home.

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