# US 2017/0257534 A1 · Pixel having a photoemitter and a photodetector triggered by a pixel selector signal bus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0257534 A1 - Document ID: US20170257534A1 - Status: Published application - Kind: A1 - Application number: 15/221,472 - Filed: 2016-07-27 - Published: 2017-09-07 - Earliest claimed: 2016-03-07 - Assignees: Microsoft Technology Licensing, LLC - Applicants: Microsoft Technology Licensing, LLC - Inventors: Jiandong Huang; Timothy Andrew Large; Liying Chen; Steven Nabil Bathiche - Web page: https://patentgrep.com/patent/US20170257534A1 ## CPC - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G06F 3/0414: {using force sensing means to determine a position} - G06F 3/042: by opto-electronic means - G06F 3/044: by capacitive means - G06F 3/045: using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact - G06T 11/60: Creating or editing images; Combining images with text - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06V 40/1335: {Combining adjacent partial images (e.g. slices) to create a composite input or reference pattern; Tracking a sweeping finger movement} - G06V 40/1359: {Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop} - H04N 23/54: Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils - H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof - H04N 25/709: Circuitry for control of the power supply - H10F 39/803: {Pixels having integrated switching, control, storage or amplification elements} - H10K 59/65: OLEDs integrated with inorganic image sensors - G06F 2203/04106: Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection - H10K 59/40: OLEDs integrated with touch screens - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## 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. ## Claims ### Claim 1 An imaging system comprising: a pixel selector signal bus configured to communicate a pixel selection signal component; and a pixel array of a display, the pixel array being electrically connected to the pixel selector signal bus and including multiple pixels configured to sense an image of an object in contact with a surface of the display, each pixel in the pixel array including one or more photodetecting elements and one or more photoemitting elements, operation of each pixel being 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. ### Claim 2 (depends on 1) The imaging system of claim 1 wherein the one or more photodetectors and the one or more photoemitting elements are positioned within the display. ### Claim 3 (depends on 1) The imaging system of claim 1 wherein the one or more photodetectors and the one or more photoemitting elements are bonded to the display opposite a display surface of a cover glass of the display. ### Claim 4 (depends on 1) The imaging system of claim 1 wherein the one or more photodetecting elements are bonded to the display opposite a display surface of a cover glass of the display and the one or more photoemitting elements are positioned within the display. ### Claim 5 (depends on 1) The imaging system of claim 1 wherein the one or more photodetecting elements are positioned within the display and the one or more photoemitting elements are bonded to the display opposite a display surface of a cover glass of the display. ### Claim 6 (depends on 1) The imaging system of claim 1 wherein the polarity of the pixel selector signal component received from the pixel selector signal bus selects photoemitter driver electronics to turn on the one or more photoemitting elements in the pixel. ### Claim 7 (depends on 1) The imaging system of claim 1 wherein the polarity of the pixel selector signal component received from the pixel selector signal bus selects photodetector driver electronics to turn on the one or more photodetecting elements in the pixel. ### Claim 8 (depends on 1) The imaging system of claim 1 wherein the pixel selector signal bus communicates an output data signal component from the pixel when the photodetector driver electronics has turned on the one or more photodetecting elements in the pixel. ### Claim 9 A method comprising: communicating a pixel selection signal component on a pixel selector signal bus; and switching operation of each pixel of a pixel array in a display between a photoemitting operation and a photodetecting operation by the pixel selector signal component received from the pixel selector signal bus, each pixel in the pixel array including one or more photodetectors and one or more photoemitting elements, the pixel array being electrically connected to the pixel selector signal bus and including multiple pixels configured to sense an image of an object in contact with a surface of the display. ### Claim 10 (depends on 9) The method of claim 9 wherein the one or more photodetectors and the one or more photoemitting elements are positioned within the display. ### Claim 11 (depends on 9) The method of claim 9 wherein the one or more photodetectors and the one or more photoemitting elements are bonded to the display opposite a display surface of a cover glass of the display. ### Claim 12 (depends on 9) The method of claim 9 wherein the one or more photodetecting elements are bonded to the display opposite a display surface of a cover glass of the display and the one or more photoemitting elements are positioned within the display. ### Claim 13 (depends on 9) The method of claim 9 wherein the one or more photodetecting elements are positioned within the display and the one or more photoemitting elements are bonded to the display opposite a display surface of a cover glass of the display. ### Claim 14 (depends on 9) The method of claim 9 wherein the polarity of the pixel selector signal component received from the pixel selector signal bus selects photoemitter driver electronics to turn on the one or more photoemitting elements in the pixel. ### Claim 15 (depends on 9) The method of claim 9 wherein the polarity of the pixel selector signal component received from the pixel selector signal bus selects photodetector driver electronics to turn on the one or more photodetecting elements in the pixel. ### Claim 16 (depends on 9) The method of claim 9 wherein the pixel selector signal bus communicates an output data signal component from the pixel when the photodetector driver electronics has turned on the one or more photodetecting elements in the pixel. ### Claim 17 An electronic device comprising: a cover glass of a display having a display surface; a pixel selector signal bus configured to communicate a pixel selection signal component; a pixel array of the display, the pixel array being electrically connected to the pixel selector signal bus and including multiple pixels configured to sense an image of an object in contact with a surface of the display, each pixel in the pixel array including one or more photodetecting elements and one or more photoemitting elements, operation of each pixel being 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; and image processing circuitry electrically coupled to the pixel array and configured to scan light from multiple pixels of the pixel array and stitch a light signal reflected from a refractive boundary at the display surface and received by photodetecting elements of the pixelated photodetecting element array into a composite image of the object. ### Claim 18 (depends on 17) The electronic device of claim 17 wherein the one or more photodetectors and the one or more photoemitting elements are positioned within the display. ### Claim 19 (depends on 17) The electronic device of claim 17 wherein the one or more photodetecting elements and the one or more photoemitting elements are positioned on different layers within the display. ### Claim 20 (depends on 17) The electronic device of claim 17 wherein the polarity of the pixel selector signal component received from the pixel selector signal bus alternatively selects photoemitter driver electronics to turn on the one or more photoemitting elements in the pixel and selects photodetector driver electronics to turn on the one or more photodetecting elements in the pixel.