# US 12,217,707 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,217,707 B2 - Document ID: US12217707B2 - Status: Granted - Kind: B2 - Application number: 18/176,702 - Filed: 2023-03-01 - Published: 2023-11-23 - Granted: 2025-02-04 - Earliest claimed: 2022-05-17 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Bo Kwang Song; Tae Kyung Ahn; Gun Hee Kim; Dae Young Lee - Web page: https://patentgrep.com/patent/US12217707B2 ## CPC - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0251: Precharge or discharge of pixel before applying new pixel voltage - G09G 2310/0262: The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2354/00: Aspects of interface with display user - G09G 2360/14: Detecting light within display terminals, e.g. using a single or a plurality of photosensors - G09G 2360/148: the light being detected by light detection means within each pixel - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract A display device includes light emitting pixels that emit light, photosensors each controlling a sensed current according to an incident light, and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data. In a sensing mode including a first frame period and a second frame period, the light emitting pixels include first sensing pixels that emit the light during the first frame period and second sensing pixels that do not emit the light during the first frame period, the photosensors include first photosensors and second photosensors, and a first distance between any one of the first sensing pixels and a first photosensor adjacent to the first sensing pixel among the first photosensors is greater than a second distance between the first sensing pixel and a second photosensor adjacent to the first sensing pixel among the second photosensors. ## Claims ### Claim 1 A display device, comprising: a plurality of light emitting pixels that emit light; a plurality of photosensors, each controlling a sensed current according to an incident light; and a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data, wherein in a sensing mode including a first frame period and a second frame period, the light emitting pixels include first sensing pixels that emit the light during the first frame period and second sensing pixels that do not emit the light during the first frame period, the photosensors include first photosensors and second photosensors, the first sensing pixels and the second photosensors are alternately disposed in a first column, and the second sensing pixels and the first photosensors are alternately disposed in a second column, and a first distance between any one of the first sensing pixels and a first photosensor adjacent to the first sensing pixel among the first photosensors is greater than a second distance between the first sensing pixel and a second photosensor adjacent to the first sensing pixel among the second photosensors. ### Claim 2 (depends on 1) The display device of claim 1, further comprising: a controller that excludes digital sensed data obtained by the second photosensors and reads a fingerprint image according to digital sensed data obtained by the first photosensors, in the first frame period. ### Claim 3 (depends on 2) The display device of claim 2, wherein during the second frame period, the second sensing pixels emit the light, and the first sensing pixels do not emit the light, and the first frame period is an odd frame period, and the second frame period is an even frame period. ### Claim 4 (depends on 1) The display device of claim 1, wherein in the first frame period, a third distance between any one of the second sensing pixels and a second photosensor adjacent to the second sensing pixel among the second photosensors is greater than a fourth distance between the second sensing pixel and a first photosensor adjacent to the second sensing pixel among the first photosensors. ### Claim 5 (depends on 4) The display device of claim 4, wherein the third distance is greater than the second distance, and the first distance is greater than the fourth distance. ### Claim 6 (depends on 5) The display device of claim 5, wherein the first distance is the same as the third distance, and the second distance is the same as the fourth distance. ### Claim 7 (depends on 1) The display device of claim 1, wherein in the first frame period, a third distance between any one of the first sensing pixels and a second sensing pixel adjacent to the first sensing pixel among the second sensing pixels is the same as a distance between the first sensing pixel and a first sensing pixel adjacent to the first sensing pixel among the first sensing pixels. ### Claim 8 (depends on 7) The display device of claim 7, wherein the third distance is the same as a distance between the second sensing pixel and a second sensing pixel adjacent to the second sensing pixel among the second sensing pixels. ### Claim 9 (depends on 7) The display device of claim 7, wherein the third distance is smaller than the first distance and greater than the second distance. ### Claim 10 (depends on 7) The display device of claim 7, wherein in the first frame period, a fourth distance between any one of the first photosensors and a second photosensor adjacent to the first photosensor among the second photosensors is the same as a distance between the first photosensor and a first photosensor adjacent to the first photosensor among the first photosensors. ### Claim 11 (depends on 10) The display device of claim 10, wherein the fourth distance is smaller than a distance between the second photosensor and a second photosensor adjacent to the second photosensor among the second photosensors. ### Claim 12 (depends on 10) The display device of claim 10, wherein the fourth distance is greater than the second distance and smaller than the first distance. ### Claim 13 (depends on 1) The display device of claim 1, wherein the light emitting pixels emit green light. ### Claim 14 (depends on 1) The display device of claim 1, wherein in the first frame period, any one of the second photosensors is disposed between any one of the first sensing pixels and another first sensing pixel adjacent to the first sensing pixel. ### Claim 15 (depends on 14) The display device of claim 14, wherein in the first frame period, any one of the second sensing pixels is disposed between any one of the first photosensors and another first photosensor adjacent to the first photosensor. ### Claim 16 A display device, comprising: a plurality of light emitting pixels that emit light; and a plurality of photosensors, each controlling a sensed current according to an incident light, wherein the light emitting pixels and the photosensors are alternately disposed in a first direction and a second direction orthogonal to the first direction, and wherein in a sensing mode including a first frame period and a second frame period, the light emitting pixels include first sensing pixels that emit the light during the first frame period and second sensing pixels that do not emit the light during the first frame period, and the photosensors include first photosensors and second photosensors. ### Claim 17 (depends on 16) The display device of claim 16, wherein the first photosensors and the second photosensors neighbor each other in the second direction. ### Claim 18 (depends on 17) The display device of claim 17, wherein the first sensing pixels and the second sensing pixels neighbor each other in the second direction. ### Claim 19 A display device, comprising: a plurality of light emitting pixels that emit light; a plurality of photosensors, including first photosensors and second photosensors, each controlling a sensed current according to an incident light; a timing controller that provides first image data to a data driver during a first frame period and provides second image data to the data driver during a second frame period, in a sensing mode; and the data driver that converts the first image data or the second image data into data voltages and supplies the data voltages to the light emitting pixels, wherein the light emitting pixels include first sensing pixels and second sensing pixels, each of the first sensing pixels receives a first data voltage for emitting light and each of the second sensing pixels receives a second data voltage for not emitting light, based on the first image data during the first frame period in the sensing mode, each of the second sensing pixels receives the first data voltage and each of the first sensing pixels receives the second data voltage, based on the second image data during the second frame period in the sensing mode, and the first sensing pixels and the second photosensors are alternately disposed in a first column, and the second sensing pixels and the first photosensors are alternately disposed in a second column. ### Claim 20 (depends on 19) The display device of claim 19, further comprising: a read-out circuit that senses the sensed current of each of the photosensors and converts the sensed current into digital sensed data, wherein a processor that excludes digital sensed data obtained by the second photosensors and reads a fingerprint image according to digital sensed data obtained by the first photosensors, in the first frame period and that excludes digital sensed data obtained by the first photosensors and reads the fingerprint image according to the digital sensed data obtained by the second photosensors, during the second frame period.