News Column

what's the big deal with bendy screens?

August 8, 2014



The world's top technology companies are placing big bets on curved screens. At the Consumer Electronics Show in Las Vegas, Samsung showcased a 105-inch behemoth that displays ultra-high definition. Its fellow South Korean rival, LG, has both a curved TV and a curved smartphone, the G Flex. Both companies showed off HDTVs whose screen you can bend on demand.

Whether there's actually a market for these devices, or if they're just outlandish proofs of concept, is anyone's guess.

But gimmickry aside, the technology behind these devices is the real achievement, because they point to a future in which flexible materials have become a common fixture everywhere - and not just in the living room.

"It's a big leap forward," said John Richard, the global business manager of DuPont's displays division.

Let's start with the resolution. Your 1 080p high-definition TV is peanuts compared with Samsung's monster, which features 2 160p displays. Sure, it's a bit of overkill, particularly since even the newest consoles like the Xbox One top out at 1 080p. The best gaming equipment on Earth can't take advantage of what Samsung has to offer here - not yet.

But the most mind-boggling part? With the touch of a remote, the ends of Samsung's highest-end prototype pop out of its housing and bend towards the viewer.

Anyone who's played a first-person shooter or a racing game knows that peripheral vision can provide a big advantage - which is why many gamers set up triple-monitor displays. Samsung's new TV promises to provide the same immersive experience as three monitors on one, single, gigantic screen and with much better image quality.

"The wider field of view and panoramic effect draws viewers in," said Joe Stinziano, the senior vice-president of sales for Samsung's consumer electronics division.

How does this stuff actually work? To get a basic grasp, it helps to draw a distinction between curved displays and flexible ones. Curved displays, says Richard, generally involve a standard flat panel display that has been bent permanently after being manufactured. Flexible ones, meanwhile, offer a lot more promise because they're capable of bending back and forth more than once, allowing users to adjust the screen to their preferences.

The key to making both is glass. For centuries, glass has been a rigid product that breaks at the slightest pressure. Yet recent advances mean engineers can now embed bendy glass into the innards of a device.

There are two types of display technology: LCD screens and OLED screens. This is the stuff that forms the images you see on your smartphone or tablet, or watch on your television. It generally has to be applied on a layer of glass and buried behind other additional layers before being covered up by the main piece of glass you touch with your fingers.

Until recently, LCDs and OLEDs could only be applied to flat surfaces. Then, in 2012, Corning - the company behind Gorilla Glass and possibly your parents' kitchenware - unveiled a flexible kind of glass called Willow. Willow is about as thin as a piece of paper and comes off the production line in gigantic, 300m-long rolls. It's been chemically coated to conduct electricity and enhance transparency.

According to Vinita Jakhanwal, an industry analyst at IHS, these and similar types of glass make it possible to build rounded surfaces that can accept LCD or OLED layers.

"What they're trying to do is make glass that is very thin," Jakhanwal said. "The thinner you get the glass, the more you can get a curvature in the glass itself."

It's not clear whether Samsung's and LG's TVs at CES just use a flat display technology with a curved piece of glass in front of it, or if the inner layers themselves were designed using curved materials.

There's still a limit to how far this stuff can bend; you can't crumple it up like paper. Nonetheless, once you've figured out how to manufacture the stuff, it's an easy jump to the next level.

"All you have to do is apply pressure using a motor," said Brian Blau, an analyst at Gartner.

The curved screens offer a glimpse into a future where bendy displays are everywhere - not just in your palm or in your living room. And when our gaming technology catches up, Call of Duty won't ever be the same again.

- The Washington Post

DFA


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Source: DFA (South Africa)


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