This disclosure describes a detachable keyboard for use with foldable computing devices. The keyboard can be charged via illumination from the display of the foldable device. Photovoltaic cells are provided on the bottom surface of the keyboard and generate electrical power from display illumination when the keyboard is placed on the display such as an organic light emitting diode (OLED) display. The illumination intensity of the pixels located directly beneath the keyboard can be adjusted to its maximum level to enable faster charging.
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Reynolds, Donny and Green, Evan, "Light Powered Keyboard Charging for Full-screen Devices", Technical Disclosure Commons, (July 14, 2021)