Triggered image sensing with a display
First Claim
1. An imaging system 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; and
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
wherein the reflected light signal received at individual photodetecting elements of the pixelated photodetecting element array comprises light which is reflected from a refractive boundary at the display surface of the cover glass by total internal reflection.
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Accused Products
Abstract
An electronic device includes a cover glass having a display surface, a pixelated photoemitting element array, and a pixelated photodetecting element array. The pixelated photoemitting element array emits a light signal through the cover glass to the display surface. The pixelated photodetecting element array is positioned relative to the pixelated photoemitting element array and the cover glass to receive a reflected light signal. The reflected light signal includes a portion of the emitted light signal reflected by total internal reflection from a refractive boundary at the display surface. Operation of each pixel is switched between the one or more photodetecting elements and the one or more photoemitting elements by the pixel selector signal component received from the pixel selector signal bus. A sensing trigger is 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.
79 Citations
19 Claims
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1. An imaging system comprising:
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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; and 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 wherein the reflected light signal received at individual photodetecting elements of the pixelated photodetecting element array comprises light which is reflected from a refractive boundary at the display surface of the cover glass by total internal reflection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method comprising:
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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; and wherein the reflected light signal received at individual photodetecting elements of the pixelated photodetecting element array comprises light which is reflected from a refractive boundary at the display surface of the cover glass by total internal reflection. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An electronic device comprising:
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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; and wherein the reflected light signal received at individual photodetecting elements of the pixelated photodetecting element array comprises light which is reflected from a refractive boundary at the display surface of the cover glass by total internal reflection. - View Dependent Claims (16, 17, 18, 19)
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Specification