# US 12,001,634 B2 · Display apparatus and driving method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,001,634 B2 - Document ID: US12001634B2 - Status: Granted - Kind: B2 - Application number: 17/919,659 - Filed: 2021-04-19 - Published: 2023-05-18 - Granted: 2024-06-04 - Earliest claimed: 2020-04-24 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Satoshi Yoshimoto; Kazunori Watanabe; Susumu Kawashima; Ryo Yamauchi; Motoharu Saito; Koji Kusunoki; Shunpei Yamazaki - Web page: https://patentgrep.com/patent/US12001634B2 ## CPC - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/042: by opto-electronic means - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G06T 7/20: Analysis of motion (motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51) - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G06T 2207/20081: Training; Learning - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/08: Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0686: with two or more screen areas displaying information with different brightness or colours - G09G 2330/023: using energy recovery or conservation - 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 2360/142: the light being detected by light detection means within each pixel - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL - 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) ## Abstract A display apparatus capable of performing authentication in a short time is provided. The display apparatus includes a first display portion where first pixels are arranged in a matrix, a second display portion where second pixels are arranged in a matrix, first and second row driver circuits, and a control circuit. Each of the first and the second pixels includes a light-receiving element. The first and the second pixels each have a function of acquiring imaging data by using the light-receiving element. The first and the second row driver circuits each have a function of selecting the first and the second pixels which read out the imaging data. The control circuit has a function of sequentially driving the first and the second row driver circuits in a first mode, and has a function of driving one of the first and the second row driver circuits on the basis of the imaging data in the second mode. Each of the scan rates of the first and the second row driver circuits in the first mode is higher than the scan rate of the first or the second row driver circuit in the second mode. ## Claims ### Claim 1 A display apparatus comprising: a first display portion where first pixels are arranged in a matrix; a second display portion where second pixels are arranged in a matrix; a first row driver circuit; a second row driver circuit; and a control circuit, wherein each of the first pixels and the second pixels comprises a light-receiving element, wherein each of the first pixels and the second pixels is configured to acquire imaging data using the light-receiving element, wherein the first row driver circuit is configured to select one of the first pixels from which the imaging data is to be read out, wherein the second row driver circuit is configured to select one of the second pixels from which the imaging data is to be read out, wherein the control circuit is configured to perform driving in a first mode in which the first row driver circuit and the second row driver circuit are sequentially driven, wherein the control circuit is configured to perform driving in a second mode in which one of the first row driver circuit and the second row driver circuit is driven based on a basis of the imaging data, and wherein each of scan rates of the first row driver circuit and the second row driver circuit in the first mode is higher than a scan rate of the first row driver circuit or the second row driver circuit in the second mode. ### Claim 2 (depends on 1) The display apparatus according to claim 1, wherein each of the first pixels and the second pixels comprises a transistor, wherein one of a source and a drain of the transistor is electrically connected to one electrode of the light-receiving element, and wherein the transistor comprises a semiconductor layer comprising a metal oxide. ### Claim 3 (depends on 1) The display apparatus according to claim 1, wherein each of the first pixels and the second pixels comprises a light-emitting element. ### Claim 4 (depends on 1) The display apparatus according to claim 1, wherein in the first mode, the control circuit is configured to detect an object in contact with the first display portion or the second display portion on a basis of the imaging data, and wherein in the second mode, the control circuit is configured to perform authentication. ### Claim 5 (depends on 4) The display apparatus according to claim 4, further comprising a machine learning arithmetic circuit, wherein when the object moves from a first point to a second point in the first display portion or the second display portion, the machine learning arithmetic circuit is configured to perform authentication on a basis of a path of the object from the first point to the second point. ### Claim 6 (depends on 5) An electronic device comprising the display apparatus according to claim 5, and a housing, wherein the machine learning arithmetic circuit is configured to perform the authentication on a basis of a contact region of the housing. ### Claim 7 (depends on 1) An electronic device comprising: the display apparatus according to claim 1; and an operation button. ### Claim 8 A method of driving a display apparatus comprising a first display portion and a second display portion in each of which pixels each comprising a light-receiving element are arranged in a matrix, comprising the steps of: acquiring first imaging data by using the light-receiving element of each of one of the pixels provided in the first display portion and one of the pixels provided in the second display portion; reading out the first imaging data by one of the pixels provided in the first display portion and then reading out the first imaging data by one of the pixels provided in the second display portion; selecting one of the first display portion and the second display portion on a basis of the first imaging data; and acquiring second imaging data by using the light-receiving element and then reading out the second imaging data in one of the pixels provided in the selected display portion, wherein time required for reading out the second imaging data is longer than time required for reading out the first imaging data. ### Claim 9 (depends on 8) The method of driving a display apparatus according to claim 8, wherein the pixel comprises a transistor, wherein one of a source and a drain of the transistor is electrically connected to one electrode of the light-receiving element, and wherein the transistor comprises a semiconductor layer comprising a metal oxide. ### Claim 10 (depends on 8) The method of driving a display apparatus according to claim 8, wherein each of the pixels comprises a light-emitting element. ### Claim 11 (depends on 8) The method of driving a display apparatus according to claim 8, further comprising the steps of: detecting an object in contact with the first display portion or the second display portion on a basis of the first imaging data and then selecting a display portion in contact with the object; and performing authentication on a basis of the second imaging data.