LED display technology gets a twist


In a development that could have implications for campus-based digital signage, U.S. researchers said they have found a way to make large-scale flexible display screens that can be stretched to fit the contours of a bus yet are transparent enough so riders can see out windows, Reuters reports. The thin, light screens might be used to make brake-light indicators that follow the contours of a car, or health monitors or imaging devices that wrap around a patient like a blanket, said John Rogers of the University of Illinois at Urbana-Champaign, whose study appears in the journal Science. He said the large display screens combine the scale and durability of light-emitting diodes, or LEDs, that are used to make flat, lighted billboards, with the flexibility of screens made using organic (carbon-containing) materials. Rogers said current technology using inorganic materials produces chunky, individual LED lights that need to be arranged piecemeal with a robotic arm. Screens made using organic materials can be sprayed or painted onto a film surface, but they are not as bright or durable. To solve this challenge, researchers built their LEDs on a thin layer of film later dissolved by a chemical and then affixed tiny plastic tabs on two corners to ensure the LEDs did not wash away in the chemical bath…

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