Samsung researchers in South Korea have designed and built a prototype of a seamless foldable Active-matrix organic light-emitting diode (AMOLED) display. The display’s mechanical and optical robustness were tested by performing 100,000 folding-unfolding cycles. The relative brightness at the junction decreased by just 6 percent, which is hardly recognizable by the human eye and so the deterioration can be considered negligible. The findings have been published in a recent issue of Applied Physics Letters.
The display consists of two AMOLED panels, silicone rubber (a hyperelastic material), a module case, and a protective glass cover (which not only prevents scratches but can also serve as a touch screen). The display has a very small folding radius of just 1 mm, so that one panel lies almost completely on top of the other when the display is folded at a 180° angle. “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,” coauthor HongShik Shim of the Samsung Advanced Institute of Technology told PhysOrg.
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Samsung Designs AMOLED Display That Can Be Folded 100,000 Times
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