OLED panel could switch between sunroof and light source

What if your car had roof panels that let you see the sky during the day, but that lit the interior of the vehicle at night? This is now a distinct possibility, thanks to work being done by BASF and Philips. As members of a consortium assembled by Germany’s Federal Ministry of Education and Research, the two companies have created OLED panels and installed them in the roof of a car. When switched on, the panels glow, lighting the cabin of the car – when switched off, they simply go transparent.

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