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Page last updated at 13:38 GMT, Friday, 16 September 2011 14:38 UK

From brainwaves to li-fi: A glimpse of tomorrow's tech

From thought-powered TV remotes to LEDs powering the web, a tantalising glimpse of the future of technology was on offer at the IFA tech show in Berlin.

As world-changing research can take decades to come to fruition, Spencer Kelly reports on some new technologies that are a few years ahead of their time.

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