Triggered image sensing with a display

A method comprising:

• emitting a light signal through a cover glass of a display to a display surface of the display, the light signal being emitted from one or more selected photoemitting elements of a pixelated photoemitting element array of the display as part of an imaging scan;
• capturing a reflected light signal at individual photodetecting elements of a pixelated photodetecting element array positioned relative to a pixelated photoemitting element array and the cover glass to receive the reflected light signal as part of the imaging scan;
• and
• triggering the imaging scan by the pixelated photoemitting element array and the pixelated photodetecting element array, responsive to detection of an initiating action by a sensing trigger positioned relative to the pixelated photodetecting element array.

An electronic device comprising:

• a cover glass having a display surface;
• a pixelated photoemitting element array, one or more selected photoemitting elements of the pixelated photoemitting element array being configured to emit a light signal through the cover glass to the display surface as part of an imaging scan;
• a pixelated photodetecting element array positioned relative to the pixelated photoemitting element array and the cover glass to receive a reflected light signal at individual photodetecting elements of the pixelated photodetecting element array as part of the imaging scan;
• a sensing trigger configured to trigger the imaging scan by the pixelated photoemitting element array and the pixelated photodetecting element array, responsive to detection of an initiating action by the sensing trigger;
• and
• image processing circuitry coupled to the sensing trigger, the pixelated photoemitting element array and the pixelated photodetecting element array, the sensing trigger transmitting trigger data to image processing circuitry to initiate the imaging scan through the cover glass.