How to use LEDs to detect light

Re:How to use LEDs to detect light by londons_explore on Thursday August 30, 2018 @02:32AM (#17874522)

I tried this on an oled display (by removing the controller and accessing row and column lines directly).

Light certainly had some effect, but I didn't get to be able to have the display show something and act as a sensor at the same time (possibly because the capacitance of the row and column lines is too high)

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Re:How to use LEDs to detect light by Sephr on Thursday August 30, 2018 @02:56AM (#17874601)

What specific display did you try this with? Maybe µLED displays will eventually be sensitive enough for use as 3d webcams or pupil tracking for AR/VR.

Capacitive touch screens in lenses can also track pupils using the shape of the eye.

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Re:How to use LEDs to detect light by DoctorOetker on Thursday August 30, 2018 @07:38AM (#17875825)

I would love to learn more about using capacitive touch screen to track pupils. Is there a specific article or smth you can recommend?

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