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Posts Tagged ‘LiquidCrystal’

postheadericon 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.

Continue reading LCD technology torn down and explained in the most lucid and accessible terms yet (video)

LCD technology torn down and explained in the most lucid and accessible terms yet (video) originally appeared on Engadget on Thu, 17 Mar 2011 10:12:00 EDT. Please see our terms for use of feeds.

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postheadericon World’s first 3D microlaser created, has a gooey Bragg-onion center

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 Muševi? 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.

World’s first 3D microlaser created, has a gooey Bragg-onion center originally appeared on Engadget on Fri, 10 Dec 2010 10:31:00 EDT. Please see our terms for use of feeds.

Permalink Daily Tech  |  sourceOptics Express  | Email this | Comments

postheadericon World’s first 3D microlaser created, has a gooey Bragg-onion center

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 Muševi? 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.

World’s first 3D microlaser created, has a gooey Bragg-onion center originally appeared on Engadget on Fri, 10 Dec 2010 10:31:00 EDT. Please see our terms for use of feeds.

Permalink Daily Tech  |  sourceOptics Express  | Email this | Comments

postheadericon 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.

Continue reading Sony ‘Hybrid FPA’ liquid crystal alignment technique sets LCD issues straight

Sony ‘Hybrid FPA’ liquid crystal alignment technique sets LCD issues straight originally appeared on Engadget on Thu, 02 Dec 2010 05:14:00 EDT. Please see our terms for use of feeds.

Permalink   |  sourceSony  | Email this | Comments