LiquidCrystal
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Engadget Primed: all mobile displays are not created equal
Primed goes in-depth on the technobabble you hear on Engadget every day -- we dig deep into each topic's history and how it benefits our lives. Looking to suggest a piece of technology for us to break down? Drop us a line at primed *at* engadget *dawt* com. The quality of a mobile phone's display is arguably the most important factor to consider when you establish a relationship with a handset. It's inescapable, really. Whether you're playing a rousing game of Robot Unicorn Attack or (regrettably) drunk-dialing an ex, it's the one interface element that you're consistently interacting with. It's your window to the world and your canvas for creation, and if it's lousy, it's going to negatively influence everything you see and do. Today, we're delving into the world of mobile displays, where we're aiming to entertain and edify, and hopefully save you from making regrettable decisions -- when it comes to purchasing new phones, anyway. In this edition of Primed, we'll be examining the different qualities and underlying technologies of several displays, starting with the ubiquitous TFT-LCD and moving through the nascent realm of glasses-free 3D and beyond. We'll also be addressing the importance of resolution and pixel density. Finally, we'll be scoping out a handful of upcoming technologies -- while some are thoroughly intriguing, others are just plain wacky. Go ahead... buy the ticket, take the ride, and join us after the break. It's Primed time.
LCD technology torn down and explained in the most lucid and accessible terms yet (video)
Look, we know you know all about LED backlights, light diffusion, subpixels, and the things that turn them on, but not everybody does. The humble LCD you're most likely reading this on still retains a level of mystery about the nitty gritty details of how it works for the vast majority of its users, so here's a terrific video breakdown of both its component parts and method of operation. Bill Hammack, a self-appointed Engineer Guy, takes us from the LED arrays that provide the light for most current LCDs, through all the filters and diffusers designed to make that light uniform, and into the ways thin film transistors make it possible for us to show moving color images of cats diving into boxes on such displays. It's exciting, deeply nerdy stuff, and it awaits your audience after the break.
World's first 3D microlaser created, has a gooey Bragg-onion center
Solid-state lasers are fine, durable and reliable and all that, but what if you want something a little softer, maybe a little more conforming to your needs and moods? Or, what if you want something that can beam light in all directions at once? Then you need to go liquid, baby, liquid. That's what Slovenian scientists (and diacritic wunderkinds) Matjaž Humar and Igor Muševič have done, creating, in their words, "3D microlasers from self-assembled cholesteric liquid-crystal microdroplets." Various layers of fluids form what's called a Bragg-onion optical microcavity, including embedded crystals not unlike those that flip the tiny switches in an LCD. These blobs are self-assembled chemically and, when a little laser is applied to them, can create a 3D image by shining their light in every dimension simultaneously. Well, not every one -- you know the Fifth Dimension can only be seen if you let the sunshine in.
Sony 'Hybrid FPA' liquid crystal alignment technique sets LCD issues straight
Sony has announced a new LCD display technology called Hybrid FPA (field-induced photo-reactive alignment), which it claims provides a bevy of improvements for LCDs in the areas of response time, contrast, panel stability, and production speed. For those of you who slept through display science in school (no shame), this boils down to Sony finding a better way to wrangle unruly liquid crystal molecules (LCMs) into more optimal alignments -- which is important since this affects how light passes and therefore how images are resolved. The new technique builds on earlier work, which focused on the vertical alignment of LCMs via an alignment layer. As the left diagram shows, through pre-tilt positioning at the substrate layer, LCMs were forced into a more stable vertical state, which made shifting them quicker and more precise while requiring less voltage. In other words, images resolved faster and more evenly, resulting in "cleaner" whites and blacks with less motion blur. Hybrid FPA simply improves the situation by aligning LCMs even more vertically, which produced response times of less than 3ms in tests. That's great news for 3D lovers and gamers, and should help Sony at least move units off of retailer shelves at some point, particularly if its plans for rapid commercialization of this tech hold true.
Liquid crystal lasers will light up next-gen HDTVs, your life
If you thought Mitsubishi's LaserVue HDTVs were the beginning and the end of laser-tech in boob tubes, think again. Mitsu's line is carrying on, but the brightness and depth of color offered by that telly are apparently just the beginning of what's possible according to researchers at the Centre of Molecular Materials for Photonics and Electronics at the University of Cambridge. They indicate that the use of liquid crystals in concert with a single, laser-based light source would result in the same color depth but at a lower cost and higher reliability than the LaserVue, which requires separate lasers for RGB. What cost, exactly? That, dear reader, remains to be seen, but given the source we're thinking you have plenty of time to save up -- and to practice those Dr. Evil impressions. [Via OLED-Display]
Micro Reactor System's flexible electronic curtain
Since you probably don't want every surface in your house of the future illuminated, Micro Reactor System has come up with a solution to make curtains that are a bit more practical but equally futuristic. Their flexible electronic "curtain" consists of two plastic panels with liquid crystal molecules in between them, which can be activated to make the curtain totally opaque, but are clear when turned off. It's apparently possible to make them in different colors as well, although it doesn't seem like one curtain can display more than one color. Like most things that we really, really want, there's no word yet on pricing or availability.
