General Motors received a patent for a system that can self-clean and remove fingerprints, oil, and grease from touchscreens.
) titled"Self-cleaning system for displays using light-emitting diodes emitting invisible violet light," the screen would use violet pixels that the human eye cannot detect in addition to red, blue, and green pixels. The touchscreen panel would also be coated with a photocatalyst that absorbs certain wavelengths.The violet pixels would be used during a cleaning cycle initiated by the driver during the day, or automatically when the vehicle is parked overnight.
Other devices can use the system covered in the patent as long as the LED displays have the photocatalytic coating and there is a source of power to turn on the violet micro-LEDs incorporated with the LED panel. The other devices mentioned in the patent include"computers, mobile devices, kiosks, televisions, kiosks, teller machines, and household appliances."
Of course, as with any patent, GM might decide never to implement this system. On the other hand, if this becomes practical, the patent could be licensed by a smartphone manufacturer and used on a future smartphone touchscreen. Currently, most smartphone displays sport an oleophobic coating that reduces fingerprints left on a smartphone's glass panels.
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