Giz Explains: What’s So Great About LED-Backlit LCDs

LED-backlit LCDs are where TV’s future and present meet—they’re the best LCDs you’ve ever seen, but they’re not as stunning as OLED displays, which will one day dominate all. They’re not cheap, but they’re not ludicrous either. Most importantly, they’re actually here.

I’ll CC You in the FL
With LCDs, it’s all about the backlighting. This defines contrast, brightness and other performance metrics. When you watch plasma TVs, OLED TVs or even old tube TVs, there’s light emanating from each pixel like it was a teeny tiny bulb. Not so with LCD—when you watch traditional LCD TV, you’re basically staring at one big lightbulb with a gel screen in front of it.

The typical old-school LCD backlighting tech is CCFL—a cold cathode fluorescent lamp—which is an array of the same kind of lights that make people’s lives miserable in offices around the world. The reason they aren’t the greatest as backlights for TV watching is that they light up the whole damn display. Because LCD is just a massive screen of tiny doors that open and close, light inevitably leaks through the closed doors, when they’re trying to show black, resulting in more of a glowy charcoal. Check out this shot from Home Theater mag to see what I mean:

LEDs (light emitting diodes) are different from say, an old school incandescent bulb, which heats up a filament to generate light, in that they’re electroluminescent—electricity passes through a semiconductor and the movement of the electrons just lights it up. Instead of having one lightbulb in the bottom of the screen, shining up through all of the LCD pixels, you can have arrays of LEDs that shine through smaller portions of the LCD screen, leaving other portions in the dark, so to speak.

OLED—”organic light emitting diode”—is slightly different. Since the electroluminescent component is organic and not a chip, each point of light can be much tinier. That’s why an LED TV still needs the LCD screen in front: there’s no way to have a single LED per pixel unless the screen is huge, and mounted to the side of a building in Times Square. OLEDs don’t: HD OLED displays are made up of red, green and blue dots, no LCD panel required.

LED Is As LED Does
So, Samsung’s term “LED TV” is more accurately—and more commonly—described as an LED-backlit LCD. But not all LED displays are created equal.

There are two major kinds of LED backlighting: Edge-lit and local dimming. Edge-lit displays are what they sound like—the LEDs are arranged in strips running along all four edges of the TV, like you can see in this gut shot from Cnet. A light guide directs the glowyness toward the center of the screen. The advantage of edge-lit displays is that they can get incredibly thin, are 40 percent more power-efficient than regular LCDs and are a bit cheaper than local-dimming TVs. But because they’re still shooting light indiscriminately across the LCD panel, they can’t pull off the black levels that a local dimming backlight setup can.

LED backlighting of the local dimming variety is how you build the best LCD TV in the world. It’s called local dimming, as you probably guessed, because there are a bunch of LED bulbs—hundreds in the Sony XBR8—arranged in a grid behind the screen. They can all be dark or brightly lit, or they can turn off individually or in clusters, making for the actual Dark Knight, rather than the Grayish Knight you’d see on many cheaper CCFL LCDs. Sets with local dimming are pricier than edge-lit—the Samsung’s local-dimming 46-incher started at $3,500, versus $2800 for one of their edge-lit models. They are thicker too.

What Color Is Your LED?
The color of the LEDs matters too, separating the best LED-backlit LCDs from the the merely great. Most LED sets just use white bulbs. The reason Sony’s XBR8 started out at $5,000—as much as Pioneer’s king-of-TVs Kuro—is because it uses tri-color LEDs in an RGB array. In each cluster, there are two green bulbs next to one red and one blue (greens aren’t as bright). The result is high contrast plus super clean, incredibly accurate color.

LED displays are getting cheaper, more quickly than originally expected, so we could see them go mainstream sooner. You already see the lower-end edge-lit LED tech used in mainstream stuff—MacBook Pro and Dell’s Mini 9 to name a couple. Which is a good thing, since the prophesied ascendancy of OLED in 2009 completely failed to happen. So we’ll have to make do with LED in the meantime. Just be sure to find out what kind when you’re buying.

LG demos ultra-bright Full HD 3D monitor

LG’s certainly been known to dabble in the third-dimension, and while we’re still waiting for it to ship those “one or two” 3D TVs this year, at least we’re confident that it’s getting closer. Over in South Korea, the company has showcased a new Full HD (1080p) 3D monitor with what it says is the highest brightness level of any competing panel. Sadly, viewers are still required to don glasses when ingesting the action, but this take on the tech enables said eyewear to be somewhat thinner and less cumbersome. Have a peek at the vid down in the read link.

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LG demos ultra-bright Full HD 3D monitor originally appeared on Engadget on Wed, 27 May 2009 09:22:00 EST. Please see our terms for use of feeds.

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LG’s LH55 series of 1080p, 240Hz LCDs now shipping

LG's LH55 series of 1080p, 240Hz LCDs now shippingRemember all those LCDs LG flooded us with at CES earlier this year? Another set of them is shipping, the LH55 models in sizes ranging from 37- to 55-inches. These don’t have any of the fancy internet connectivity or wireless HDMI tricks offered by some of the company’s more flash sets, but all offer 1080p resolutions at TruMotion 240Hz refresh rates, 80,000:1 contrast ratios, and other niceties like auto-calibration and Clear Voice II, which pledges to ensure dialogue doesn’t get washed out by heavyhanded soundtracks. They’re all Energy Star 3.0 certified, too, so you’ll feel a little more green while watching that Discovery Earth Blu-ray on a television that’s almost five feet on the diagonal. MSRPs range from $1,399 up to $3,899, so get bargain hunting.

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LG’s LH55 series of 1080p, 240Hz LCDs now shipping originally appeared on Engadget on Wed, 27 May 2009 06:36:00 EST. Please see our terms for use of feeds.

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Samsung ships $129 SPF-87H 8-inch digiframe / secondary monitor

Samsung’s been dousing just about anything it can get its paws on with that ‘Touch of Color‘ design scheme, and even the outfit’s latest digiframe wasn’t able to dodge the madness. The 8-inch SPF-87H, which was originally introduced to the world back in April, is now shipping to those scouting a multifaceted digital photo frame. Unlike traditional alternatives, this 0.91-inch thick frame can double as a secondary display (via USB), and the respectable 800 x 480 resolution panel ensures that you can fit more than just a weather widget on there. Other specs include 1GB of built-in storage, an SD expansion slot, 500:1 contrast ratio and a $129 price tag.

[Via HotHardware]

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Samsung ships $129 SPF-87H 8-inch digiframe / secondary monitor originally appeared on Engadget on Sun, 24 May 2009 07:02:00 EST. Please see our terms for use of feeds.

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Sharp’s 20-inch AQUOS DX LCD HDTV has a built-in Blu-ray player, no 1080p panel

Cute Sharp, real cute. Brag about releasing the world’s first 20-inch LCD HDTV with a built-in Blu-ray player, but don’t even mention to consumers that they won’t have the luxury of seeing their flicks in full resolution. For reasons unknown, the latest set in the AQUOS DX range does indeed pack a remarkably convenient integrated BD player, but the 1,366 x 768 resolution makes the whole thing sort of pointless. As Liz Lemon would say: “That’s a deal-breaker, ladies.” At any rate, folks who snap one up in Japan will also find a digital TV tuner, DVD support, a 1,500:1 contrast ratio and 450 nits of brightness. It’ll be available in black (LC-20DX1-B) and white (LC-20DX1-W) for ¥150,000 ($1,593) at the tail end of next month in the Land of the Rising Sun.

[Via Engadget German]

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Sharp’s 20-inch AQUOS DX LCD HDTV has a built-in Blu-ray player, no 1080p panel originally appeared on Engadget on Fri, 22 May 2009 07:39:00 EST. Please see our terms for use of feeds.

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eMachines delivers EL1300 line of small form factor PCs

Once the laughing stock of the PC world, eMachines has managed to pull together some rather stylish looking rigs over the past few months. As the comeback continues, the company has outed two new Mini PCs in its EL1300 line, the $298 EL1300G-01w and the $398 EL1300G-02w. Both systems include a chassis that’s 10.7-inches tall, 4.2-inches wide and 15-inches long (not exactly “mini” in our books…), and while the power ain’t anything to write home about, it should handle Word processing and the occasional YouTube video fine. Speaking of specs, both rigs boast a 1.6GHz AMD Athlon 2650e CPU, NVIDIA’s GeForce 6150SE integrated graphics, a 160GB SATA HDD, 18x SuperMulti DVD burner, nine USB 2.0 sockets and a multicard reader. Personally, we’d select the more pricey of the two, as that one arrives with a 20-inch LCD (E202H) and Windows XP rather than Vista Home Basic. Totally your call though, boss.

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eMachines delivers EL1300 line of small form factor PCs originally appeared on Engadget on Wed, 20 May 2009 09:36:00 EST. Please see our terms for use of feeds.

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DisplayLink boldly enters HD realm on new Samsung LapFit displays

Compared to technologies such as Wireless USB, DisplayLink has actually done fairly well for itself. Nah, it’s no worldwide phenomenon, but it definitely has enough traction to really shine once USB 3.0‘s bandwidth arrives. That said, the tech is making the most of its current situation with the introduction of the DL-1×5 Series processors, two of which actually support Full HD. The DL-125, DL-165 and DL-195 will all slide into USB-enabled LCD monitors here shortly, with the middle guy supporting resolutions as high as 1,920 x 1,080 and the DL-195 cranking things to 2,048 x 1,152 before crying “Uncle!” In theory, at least, this enables laptop users to connect high-res screens when their desktop replacement needs a helping hand, and it can be enjoyed now by consumers in Asia, the Middle East, Russia and Europe who can snag themselves a new SyncMaster LapFit LD190G or LD220G monitor.

[Via EverythingUSB, thanks Ian]

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DisplayLink boldly enters HD realm on new Samsung LapFit displays originally appeared on Engadget on Wed, 20 May 2009 09:11:00 EST. Please see our terms for use of feeds.

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LG Announces Worlds Thinnest 42 47 1080p LCDs

LG today announced two new ultra-thin LCDs. The 42- and 47-inch 1080p displays measure 0.23-inch, thanks to the company’s new Light Guide Sheet, which measures in at roughly half the size of standard Light Guide Plates.

The new displays weight 13.42 and 16.06-pounds for the 42 and 47-inch models–about half the weight of other models of their size. The new technology also boasts an improvement of NTSC from 72- to 80-percent.

LG world’s thinnest LCD is only 0.23 inches thick

Looks like we’ve got a new record holder for world’s thinnest LCD, as LG pegs its new 42- and 47-inch models at only 5.9mm thick. Apparently lacking an iPhone for the accepted measurement of thinness, this model was reduced to holding up a coin for an example of LG’s edge LED lit prowess. Though you may prefer local dimming LEDs, DisplayBlog is hopeful we’ll see a combo of the two lighting schemes bringing thinness and high picture quality next year. Meanwhile, compare these to JVC’s magnetically mounted former champ, measuring a now-widebody 7mm thick, but at only 5kg, still holding a weight edge over these two at 6.1 and 7.3kg, respectively. LG promises 120Hz refresh technology and 80% of the NTSC color gamut, up from 72% on standard models, on these, but we’ll wait for them to go from the demo stand to the store shelf before revisiting the question of whether thinner and more energy efficient is actually better.

[Via DisplayBlog]

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LG world’s thinnest LCD is only 0.23 inches thick originally appeared on Engadget on Tue, 19 May 2009 01:04:00 EST. Please see our terms for use of feeds.

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Dell rolls out budget, eco-minded P2210, E190S, E170S monitors

We just caught sight of one low-cost Dell monitor headed for Hong Kong a few days ago, and it looks like the company has now rolled out another three for folks over here, including the widescreen P2210 model, and the old school E190S and E170S 4:3 models. Each of those meet the usual EPEAT Gold and Energy Star requirements, and Dell also goes one step further by using halogen-free laminates and a chassis composed of 25% post-consumer recycled plastics. Of course, they’ll also get the job done spec-wise, with the 22-inch widescreen model boasting a 1,680 by 1,050 resolution along with VGA, DVI and DisplayPort connections, while the 17 and 19-inch 4:3 models dial things back to 1,280 x 1,024 and VGA only. Good enough? Then you can grab any one right now for $110, $130 or $240.

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Dell rolls out budget, eco-minded P2210, E190S, E170S monitors originally appeared on Engadget on Thu, 14 May 2009 16:28:00 EST. Please see our terms for use of feeds.

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