# US 2021/0243885 A1 · Method for electromagnetic interference control, electronic device, and storage medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0243885 A1 - Document ID: US20210243885A1 - Status: Published application - Kind: A1 - Application number: 17/237,448 - Filed: 2021-04-22 - Published: 2021-08-05 - Earliest claimed: 2018-10-23 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Kai TANG; Zhengpeng TAN; Yun CHEN; Lizhong WANG; Hai YANG - Web page: https://patentgrep.com/patent/US20210243885A1 ## CPC - H05K 9/0054: {specially adapted for display applications} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/04184: {Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally} - G06F 3/147: using display panels - G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints - G06V 40/13: Sensors therefor - G09G 5/006: {Details of the interface to the display terminal (specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04)} - H04M 1/72454: according to context-related or environment-related conditions - H05K 1/0216: {Reduction of cross-talk, noise or electromagnetic interference (grounding H05K1/0215)} - G09G 2340/0435: Change or adaptation of the frame rate of the video stream - H04M 1/026: {Details of the structure or mounting of specific components} - H04M 1/0266: {for a display module assembly} - H04M 2250/12: including a sensor for measuring a physical value, e.g. temperature or motion - H05K 2201/10128: Display - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - 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) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A method for electromagnetic interference control, an electronic device, and a storage medium are provided. The method is for an electronic device. The electronic device includes a display screen and an under-screen fingerprint assembly arranged under a preset region of the display screen. The method includes the following. Detect electromagnetic interference between the under-screen fingerprint assembly and the display screen in response to detecting that the under-screen fingerprint assembly is activated, where the preset region of the display screen is in a lighted state. Frequency-hopping is performed for a mobile industry processor interface (MIPI) of the display screen in response to the detected electromagnetic interference. ## Claims ### Claim 1 A method for electromagnetic interference control, for an electronic device comprising a display screen and an under-screen fingerprint assembly arranged under a preset region of the display screen, the method comprising: detecting electromagnetic interference between the under-screen fingerprint assembly and the display screen in response to detecting that the under-screen fingerprint assembly is activated, wherein the preset region of the display screen is in a lighted state; and performing frequency-hopping for a mobile industry processor interface (MIPI) of the display screen in response to the detected electromagnetic interference. ### Claim 2 (depends on 1) The method of claim 1, wherein performing frequency-hopping for the MIPI of the display screen comprises: determining a target frequency of an MIPI frequency of the display screen; and adjusting the MIPI frequency of the display screen to the target frequency. ### Claim 3 (depends on 2) The method of claim 2, wherein determining the target frequency of the MIPI frequency of the display screen comprises: obtaining an available frequency range or an available frequency of the MIPI frequency of the display screen; and determining the target frequency of the MIPI frequency of the display screen according to a first sampling frequency of the under-screen fingerprint assembly, and any one of the available frequency range and the available frequency. ### Claim 4 (depends on 3) The method of claim 3, wherein obtaining the available frequency range or the available frequency of the MIPI frequency of the display screen comprises: determining a display state of the display screen, wherein the display state comprises a screen-off display state and a screen-on display state, wherein only the preset region of the display screen is lighted up in the screen-off display state, and a whole screen of the display screen is lighted up in the screen-on display state; and determining the available frequency range or the available frequency of the MIPI frequency corresponding to the display state of the display screen by querying a mapping relationship set, wherein the mapping relationship set comprises correspondences between display states and any one of available frequency ranges and available frequencies of the MIPI frequency. ### Claim 5 (depends on 2) The method of claim 2, wherein adjusting the MIPI frequency of the display screen to the target frequency comprises: obtaining a target value of a screen parameter associated with the target frequency, wherein the target value is associated with a reference value, the reference value is determined by the electronic device under a first constraint condition according to a frame rate calculation equation and the target frequency, the first constraint condition is that a change amount of a frame rate of the display screen after MIPI frequency switching is less than a first threshold, and the screen parameter comprises at least one of the following porch values in the frame rate calculation equation: horizontal back porch (HBP), horizontal front porch (HFP), vertical back porch (VBP), vertical front porch (VFP), vertical sync active (VSA), or horizontal sync active (HSA); and adjusting a value of the screen parameter to the target value of the screen parameter and adjusting the MIPI frequency of the display screen to the target frequency. ### Claim 6 (depends on 5) The method of claim 5, wherein the screen parameter comprises a horizontal screen parameter, wherein the horizontal screen parameter comprises at least one of the HBP, the HFP, or the HSA; and the target value is determined by adjusting the reference value under a second constraint condition by the electronic device, wherein the second constraint condition is that a change amount of a line scan duration of the display screen after the MIPI frequency switching is less than a second threshold. ### Claim 7 (depends on 1) The method of claim 1, wherein detecting electromagnetic interference between the under-screen fingerprint assembly and the display screen comprises: detecting a first sampling frequency of the under-screen fingerprint assembly and a first frequency of the MIPI of the display screen; and detecting the electromagnetic interference between the under-screen fingerprint assembly and the display screen according to the first sampling frequency and the first frequency. ### Claim 8 (depends on 7) The method of claim 7, wherein detecting the electromagnetic interference between the under-screen fingerprint assembly and the display screen according to the first sampling frequency and the first frequency comprises: determining a first frequency set according to the first frequency, wherein the first frequency set comprises the first frequency and at least one of at least one frequency division of the first frequency and at least one frequency multiplication of the first frequency; and detecting the electromagnetic interference between the under-screen fingerprint assembly and the display screen by comparing the first sampling frequency with frequencies in the first frequency set. ### Claim 9 (depends on 1) The method of claim 1, wherein the preset region is a display region adjacent to the under-screen fingerprint assembly. ### Claim 10 An electronic device comprising: a display screen; an under-screen fingerprint assembly arranged under a preset region of the display screen; at least one processor; and a memory, coupled to the at least one processor and storing at least one computer executable instruction thereon which, when executed by the at least one processor, causes the at least one processor to: detect electromagnetic interference between the under-screen fingerprint assembly and the display screen in response to detecting that the under-screen fingerprint assembly is activated, wherein the preset region of the display screen is in a lighted state, and perform frequency-hopping for a mobile industry processor interface (MIPI) of the display screen in response to the detected electromagnetic interference. ### Claim 11 (depends on 10) The electronic device of claim 10, wherein the at least one processor configured to perform frequency-hopping for the MIPI of the display screen is configured to: determine a target frequency of an MIPI frequency of the display screen, and adjust the MIPI frequency of the display screen to the target frequency. ### Claim 12 (depends on 11) The electronic device of claim 11, wherein the at least one processor configured to determine the target frequency of the MIPI frequency of the display screen is configured to: obtain an available frequency range or an available frequency of the MIPI frequency of the display screen, and determine the target frequency of the MIPI frequency of the display screen according to a first sampling frequency of the under-screen fingerprint assembly, and any one of the available frequency range and the available frequency. ### Claim 13 (depends on 12) The electronic device of claim 12, wherein the at least one processor configured to obtain the available frequency range or the available frequency of the MIPI frequency of the display screen is configured to: determine a display state of the display screen, wherein the display state comprises a screen-off display state and a screen-on display state, wherein only the preset region of the display screen is lighted up in the screen-off display state, and a whole screen of the display screen is lighted up in the screen-on display state, and determine the available frequency range or the available frequency of the MIPI frequency corresponding to the display state of the display screen by querying a mapping relationship set, wherein the mapping relationship set comprises correspondences between display states and any one of available frequency ranges and available frequencies of the MIPI frequency. ### Claim 14 (depends on 11) The electronic device of claim 11, wherein the at least one processor configured to adjust the MIPI frequency of the display screen to the target frequency is configured to: obtain a target value of a screen parameter associated with the target frequency, wherein the target value is associated with a reference value, the reference value is determined by the electronic device under a first constraint condition according to a frame rate calculation equation and the target frequency, the first constraint condition is that a change amount of a frame rate of the display screen after MIPI frequency switching is less than a first threshold, and the screen parameter comprises at least one of the following porch values in the frame rate calculation equation: horizontal back porch (HBP), horizontal front porch (HFP), vertical back porch (VBP), vertical front porch (VFP), vertical sync active (VSA), or horizontal sync active (HSA), and adjust a value of the screen parameter to the target value of the screen parameter and adjusting the MIPI frequency of the display screen to the target frequency. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein the screen parameter comprises a horizontal screen parameter, wherein the horizontal screen parameter comprises at least one of the HBP, the HFP, or the HSA; and the target value is determined by adjusting the reference value under a second constraint condition by the electronic device, wherein the second constraint condition is that a change amount of a line scan duration of the display screen after the MIPI frequency switching is less than a second threshold. ### Claim 16 (depends on 10) The electronic device of claim 10, wherein the at least one processor configured to detect electromagnetic interference between the under-screen fingerprint assembly and the display screen is configured to: detect a first sampling frequency of the under-screen fingerprint assembly and a first frequency of the MIPI of the display screen, and detect the electromagnetic interference between the under-screen fingerprint assembly and the display screen according to the first sampling frequency and the first frequency. ### Claim 17 (depends on 16) The electronic device of claim 16, wherein the at least one processor configured to detect the electromagnetic interference between the under-screen fingerprint assembly and the display screen according to the first sampling frequency and the first frequency is configured to: determine a first frequency set according to the first frequency, wherein the first frequency set comprises the first frequency and at least one of at least one frequency division of the first frequency and at least one frequency multiplication of the first frequency, and detect the electromagnetic interference between the under-screen fingerprint assembly and the display screen by comparing the first sampling frequency with frequencies in the first frequency set. ### Claim 18 (depends on 10) The electronic device of claim 10, wherein the preset region is a display region adjacent to the under-screen fingerprint assembly. ### Claim 19 A non-transitory computer readable storage medium storing a computer program which, when executed by a processor, causes the processor to: detect electromagnetic interference between a under-screen fingerprint assembly of an electronic device and a display screen of the electronic device in response to detecting that the under-screen fingerprint assembly is activated, and perform frequency-hopping for a mobile industry processor interface (MIPI) of the display screen in response to the detected electromagnetic interference, wherein the under-screen fingerprint assembly is arranged under a preset region of the display screen; wherein the preset region of the display screen is in a lighted state. ### Claim 20 (depends on 19) The non-transitory computer readable storage medium of claim 19, wherein the computer program executed by the processor to perform frequency-hopping for the MIPI of the display screen is executed by the processor to: determine a target frequency of an MIPI frequency of the display screen, and adjust the MIPI frequency of the display screen to the target frequency.