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Foldable Display Shows No Crease After 100,000 Folding Cycles

By PhysOrg.com

May 16, 2011

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Samsung Advanced Institute of Technology researchers have developed a prototype seamless display that folds in half without a noticeable crease in the middle.

The active-matrix organic light-emitting-diode (AMOLED) display consists of two AMOLED panels, silicone rubber, a protective glass cover, and a module case. The display has a folding radius of just one millimeter, so that one panel lies on top of the other when the display is folded at a 180-degree angle. The glass cover also can act as a touch screen for the device.

"All the materials in a foldable window unit (glasses and silicone rubber) must have almost the same optical properties and attach to each other strongly without any optical property change," says Samsung Advanced Institute of Technology's HongShik Shim.

During testing, the display's relative brightness at its junction decreased just six percent after 100,000 folding/unfolding cycles, which the researchers say is barely recognizable by the human eye. They say the device could have applications in mobile games, cellular phones, tablet PCs, and notebook PCs.

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