# US 12,008,939 B2 · Electronic circuit having display driving function, touch sensing function and fingerprint sensing function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,939 B2 - Document ID: US12008939B2 - Status: Granted - Kind: B2 - Application number: 18/163,287 - Filed: 2023-02-02 - Published: 2023-06-08 - Granted: 2024-06-11 - Earliest claimed: 2019-08-01 - Assignees: Novatek Microelectronics Corp. - Applicants: Novatek Microelectronics Corp. - Inventors: Huan-Teng Cheng; Ting-Hsuan Hung; Wei-Lun Shih; Huang-Chin Tang - Web page: https://patentgrep.com/patent/US12008939B2 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06V 40/13: Sensors therefor - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G06F 3/04166: {Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving (Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184)} - G09G 3/3688: {suitable for active matrices only} - G09G 2310/0272: Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current - G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns - G09G 2354/00: Aspects of interface with display user - 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) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract An electronic circuit includes a fingerprint sensing circuit that is configured to receive fingerprint sensing signals corresponding to a fingerprint image from fingerprint sensors via fingerprint sensing lines. The fingerprint sensing circuit is further configured to select a subset of the fingerprint sensing lines to form a fingerprint sensing zone having at least one boundary and adapted for a fingerprint sensing operation based on a fingerprint touch area. The subset of fingerprint sensing lines is selected based on the at least one boundary of the fingerprint sensing zone. The fingerprint sensing circuit is further configured to generate the fingerprint image according to the fingerprint sensing signals by a remapping operation. ## Claims ### Claim 1 An electronic circuit, adapted to process fingerprint data from a panel comprising touch sensors and fingerprint sensors, the electronic circuit comprising: a fingerprint sensing circuit, configured to receive fingerprint sensing signals corresponding to a fingerprint image from the fingerprint sensors via fingerprint sensing lines, the fingerprint sensing circuit is further configured to: select a subset of the fingerprint sensing lines to form a fingerprint sensing zone having at least one boundary and adapted for a fingerprint sensing operation based on a fingerprint touch area, wherein the subset of fingerprint sensing lines is selected based on the at least one boundary of the fingerprint sensing zone, and generate the fingerprint image according to the fingerprint sensing signals by a remapping operation, wherein the remapping operation comprises rearranging a first part of the fingerprint image obtained from the fingerprint sensing zone and a second part of the fingerprint image obtained from the fingerprint sensing zone. ### Claim 2 (depends on 1) The electronic circuit of claim 1, wherein the fingerprint sensing circuit generates the first part of the fingerprint image according to fingerprint sensing signals received from a first part of fingerprint sensing lines of the fingerprint sensing zone and the second part of the fingerprint image according to fingerprint sensing signals received from a second part of fingerprint sensing lines of the fingerprint sensing zone. ### Claim 3 (depends on 2) The electronic circuit of claim 2, wherein the fingerprint sensing circuit comprises a plurality of fingerprint sensing channels, the first part of fingerprint sensing lines of the fingerprint sensing zone corresponds to a first number of the fingerprint sensing channels, the second part of fingerprint sensing lines of the fingerprint sensing zone corresponds to a second number of the fingerprint sensing channels, and a summation of the first number and the second number is not larger than a total number of the fingerprint sensing channels. ### Claim 4 (depends on 1) The electronic circuit of claim 1, further comprising: a switch circuit, coupled to the fingerprint sensing lines and configured to receive the fingerprint sensing signals from the fingerprint sensing lines, wherein the fingerprint sensing circuit comprises a plurality of fingerprint sensing channels coupled to the switch circuit, and the fingerprint sensing channels receive the fingerprint sensing signals from the subset of fingerprint sensing lines. ### Claim 5 (depends on 1) The electronic circuit of claim 1, further comprising: a touch sensing circuit, configured to receive touch sensing signals from the touch sensors of the panel and determine the fingerprint touch area according to the touch sensing signals. ### Claim 6 (depends on 1) The electronic circuit of claim 1, wherein each of the fingerprint sensing lines is selectable to be the at least one boundary of the fingerprint sensing zone. ### Claim 7 (depends on 1) The electronic circuit of claim 1, wherein a size of the fingerprint sensing zone is determined according to a number of fingerprint sensing channels of the fingerprint sensing circuit. ### Claim 8 (depends on 1) The electronic circuit of claim 1, wherein the fingerprint sensing signals carried on the subset of fingerprint sensing lines are read out by the fingerprint sensing circuit at a time. ### Claim 9 (depends on 1) The electronic circuit of claim 1, wherein the fingerprint sensing zone is coupled to at least a portion of the fingerprint image, and the at least a portion of the fingerprint image comprises sufficient fingerprint features for fingerprint identification. ### Claim 10 An electronic device, comprising: a panel, comprising touch sensors and fingerprint sensors; and an electronic circuit, coupled to the panel and adapted to receive fingerprint sensing signals corresponding to a fingerprint image from the fingerprint sensors via fingerprint sensing lines of the panel, the electronic circuit is further configured to: select a subset of the fingerprint sensing lines to form a fingerprint sensing zone adapted for a fingerprint sensing operation and comprising at least one boundary based on a fingerprint touch area, wherein the subset of fingerprint sensing lines is selected based on the at least one boundary of the fingerprint sensing zone, and generate the fingerprint image according to the fingerprint sensing signals by a remapping operation, wherein the remapping operation comprises rearranging a first part of the fingerprint image obtained from the fingerprint sensing zone and a second part of the fingerprint image obtained from the fingerprint sensing zone. ### Claim 11 (depends on 10) The electronic device of claim 10, wherein the electronic circuit generates the first part of the fingerprint image according to fingerprint sensing signals received from a first part of fingerprint sensing lines of the fingerprint sensing zone and the second part of the fingerprint image according to fingerprint sensing signals received from a second part of fingerprint sensing lines of the fingerprint sensing zone. ### Claim 12 (depends on 11) The electronic device of claim 11, wherein the electronic circuit comprises a plurality of fingerprint sensing channels, the first part of fingerprint sensing lines of the fingerprint sensing zone corresponds to a first number of the fingerprint sensing channels, the second part of fingerprint sensing lines of the fingerprint sensing zone corresponds to a second number of the fingerprint sensing channels, and a summation of the first number and the second number is not larger than a total number of the fingerprint sensing channels. ### Claim 13 (depends on 10) The electronic device of claim 10, wherein the electronic circuit comprises: a fingerprint sensing circuit, configured to determine the fingerprint sensing zone to perform the fingerprint sensing operation according to the fingerprint touch area and receive the fingerprint sensing signals corresponding to the fingerprint image from the fingerprint sensing zone, wherein the fingerprint sensing circuit generates the fingerprint image according to the fingerprint sensing signals by the remapping operation. ### Claim 14 (depends on 13) The electronic device of claim 13, wherein the electronic circuit further comprises: a switch circuit, coupled to the fingerprint sensing lines and configured to receive the fingerprint sensing signals from the fingerprint sensing lines, wherein the fingerprint sensing circuit comprises a plurality of fingerprint sensing channels coupled to the switch circuit, and the fingerprint sensing channels receive the fingerprint sensing signals from the subset of fingerprint sensing lines. ### Claim 15 (depends on 13) The electronic device of claim 13, wherein the electronic circuit further comprises: a touch sensing circuit, configured to receive touch sensing signals from the touch sensors of the panel and determine the fingerprint touch area according to the touch sensing signals. ### Claim 16 (depends on 10) The electronic device of claim 10, wherein each of the fingerprint sensing lines is selectable to be the at least one boundary of the fingerprint sensing zone. ### Claim 17 (depends on 10) The electronic device of claim 10, wherein a size of the fingerprint sensing zone is determined according to a number of fingerprint sensing channels of the electronic circuit. ### Claim 18 (depends on 10) The electronic device of claim 10, wherein the fingerprint sensing signals carried on the subset of fingerprint sensing lines are read out by the electronic circuit at a time. ### Claim 19 (depends on 10) The electronic device of claim 10, wherein the fingerprint sensing zone is coupled to at least a portion of the fingerprint image, and the at least a portion of the fingerprint image comprises sufficient fingerprint features for fingerprint identification. ### Claim 20 A method for sensing at least one fingerprint imprint from a panel comprising touch sensors and fingerprint sensors, wherein the fingerprint sensors are coupled to fingerprint sensing lines, the method comprising: selecting a subset of the fingerprint sensing lines to form a fingerprint sensing zone having at least one boundary and adapted for a fingerprint sensing operation based on a fingerprint touch area, wherein the subset of fingerprint sensing lines is selected based on the at least one boundary of the fingerprint sensing zone; receiving fingerprint sensing signals corresponding to a fingerprint image via the subset of fingerprint sensing lines; and generating the fingerprint image according to the fingerprint sensing signals using a remapping operation, wherein the remapping operation comprises rearranging a first part of the fingerprint image obtained from the fingerprint sensing zone and a second part of the fingerprint image obtained from the fingerprint sensing zone. ### Claim 21 (depends on 20) The method of claim 20, wherein the step of generating the fingerprint image according to the fingerprint sensing signals using the remapping operation comprises: generating the first part of the fingerprint image according to fingerprint sensing signals received from a first part of fingerprint sensing lines of the fingerprint sensing zone; generating the second part of the fingerprint image according to fingerprint sensing signals received from a second part of fingerprint sensing lines of the fingerprint sensing zone. ### Claim 22 (depends on 20) The method of claim 20, further comprising: controlling a switch circuit to select the subset of fingerprint sensing lines for the fingerprint sensing operation. ### Claim 23 (depends on 22) The method of claim 22, wherein the switch circuit comprises a plurality of switches, and the step of controlling the switch circuit to select the subset of fingerprint sensing lines for the fingerprint sensing operation comprises: controlling the switch circuit to turn on a subset of the plurality of switches corresponding to the subset of fingerprint sensing lines; and controlling the switch circuit to turn off the rest of the plurality of switches corresponding to the rest of the fingerprint sensing lines that is not selected. ### Claim 24 (depends on 20) The method of claim 20, further comprising: determining the fingerprint touch area according to touch sensing signals from the touch sensors.