# US 2020/0401308 A1 · Method and apparatus for scanning touch screen, and medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401308 A1 - Document ID: US20200401308A1 - Status: Published application - Kind: A1 - Application number: 16/699,585 - Filed: 2019-11-30 - Published: 2020-12-24 - Earliest claimed: 2019-06-20 - Assignees: Beijing Xiaomi Mobile Software Co., Ltd. - Applicants: Beijing Xiaomi Mobile Software Co., Ltd. - Inventors: Tsang-chih WU - Web page: https://patentgrep.com/patent/US20200401308A1 ## CPC - G06F 3/041661: {using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window} - G06F 3/041662: {using alternate mutual and self-capacitive scanning} - G06F 1/3262: {Power saving in digitizer or tablet} - G06F 3/04186: {Touch location disambiguation} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A method for scanning a touch screen includes: scanning the touch screen in a first scanning manner, the first scanning manner using a first report rate; and switching to a second scanning manner to scan the touch screen in response to detecting that the touch screen is touched in the first scanning manner, the second scanning manner using a second report rate. The number of scan regions into which the touch screen is divided in the first scanning manner is smaller than that of scan regions into which the touch screen is divided in the second scanning manner, and the first report rate is greater than or equal to the second report rate. ## Claims ### Claim 1 A method for scanning a touch screen, comprising: scanning the touch screen in a first scanning manner, the first scanning manner using a first report rate; and switching to a second scanning manner to scan the touch screen in response to detecting, in the first scanning manner, that the touch screen is touched, the second scanning manner using a second report rate; wherein a number of scan regions into which the touch screen is divided in the first scanning manner is smaller than another number of scan regions into which the touch screen is divided in the second scanning manner, and the first report rate is greater than or equal to the second report rate. ### Claim 2 (depends on 1) The method according to claim 1, wherein the first scanning manner is a self-capacitance scanning manner, and the second scanning manner is a mutual-capacitance scanning manner. ### Claim 3 (depends on 2) The method according to claim 2, wherein the first report rate is 240 Hz, and the second report rate is 120 Hz or 240 Hz. ### Claim 4 (depends on 1) The method according to claim 1, wherein before the scanning the touch screen in a first scanning manner, the method further comprises: determining, based on a usage state of the touch screen, to scan the touch screen in the first scanning manner. ### Claim 5 (depends on 4) The method according to claim 4, wherein the determining, based on a usage state of the touch screen, to scan the touch screen in the first scanning manner comprises at least one of: determining whether an application program displayed on the touch screen is sensitive to touch response speed and, if yes, determining to scan the touch screen in the first scanning manner; or determining whether a current available power of the touch screen is less than a preset threshold and, if yes, determining to scan the touch screen in the first scanning manner. ### Claim 6 (depends on 1) The method according to claim 1, wherein after the switching to a second scanning manner to scan the touch screen, the method further comprises: switching to the first scanning manner to scan the touch screen in response to detecting, in the second scanning manner, that the touch screen is not touched within a preset time period. ### Claim 7 An apparatus for scanning a touch screen, comprising: a processor, and a memory, configured to store instructions executable by the processor; wherein the processor is configured to: scan the touch screen in a first scanning manner, the first scanning manner using a first report rate; and switch to a second scanning manner to scan the touch screen in response to detecting, in the first scanning manner, that the touch screen is touched, the second scanning manner using a second report rate; wherein a number of scan regions into which the touch screen is divided in the first scanning manner is smaller than another number of scan regions into which the touch screen is divided in the second scanning manner, and the first report rate is greater than or equal to the second report rate. ### Claim 8 (depends on 7) The apparatus according to claim 7, wherein the first scanning manner is a self-capacitance scanning manner, and the second scanning manner is a mutual-capacitance scanning manner. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein the first report rate is 240 Hz, and the second report rate is 120 Hz or 240 Hz. ### Claim 10 (depends on 7) The apparatus according to claim 7, wherein the processor is further configured to: determine, based on a usage state of the touch screen, to scan the touch screen in the first scanning manner. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the processor is specifically configured to perform at least one action of: determining whether an application program displayed on the touch screen is sensitive to touch response speed and, if yes, determining to scan the touch screen in the first scanning manner; or determining whether a current available power of the touch screen is less than a preset threshold and, if yes, determining to scan the touch screen in the first scanning manner. ### Claim 12 (depends on 7) The apparatus according to claim 7, wherein the processor is further configured to: switch to the first scanning manner to scan the touch screen in response to detecting, in the second scanning manner, that the touch screen is not touched within a preset time period. ### Claim 13 A non-transitory computer-readable storage medium, wherein instructions in the storage medium are executed by a processor of a terminal such that the terminal can execute a method for scanning a touch screen, the method comprising: scanning the touch screen in a first scanning manner, the first scanning manner using a first report rate; and switching to a second scanning manner to scan the touch screen in response to detecting, in the first scanning manner, that the touch screen is touched, the second scanning manner using a second report rate; wherein a number of scan regions into which the touch screen is divided in the first scanning manner is smaller than another number of scan regions into which the touch screen is divided in the second scanning manner, and the first report rate is greater than or equal to the second report rate. ### Claim 14 (depends on 13) The storage medium according to claim 13, wherein the first scanning manner is a self-capacitance scanning manner, and the second scanning manner is a mutual-capacitance scanning manner. ### Claim 15 (depends on 14) The storage medium according to claim 14, wherein the first report rate is 240 Hz, and the second report rate is 120 Hz or 240 Hz. ### Claim 16 (depends on 13) The storage medium according to claim 13, wherein before the scanning the touch screen in a first scanning manner, the method further comprises: determining, based on a usage state of the touch screen, to scan the touch screen in the first scanning manner. ### Claim 17 (depends on 16) The storage medium according to claim 16, wherein the determining, based on a usage state of the touch screen, to scan the touch screen in the first scanning manner comprises at least one of: determining whether an application program displayed on the touch screen is sensitive to touch response speed and, if yes, determining to scan the touch screen in the first scanning manner; or determining whether a current available power of the touch screen is less than a preset threshold and, if yes, determining to scan the touch screen in the first scanning manner. ### Claim 18 (depends on 13) The storage medium according to claim 13, wherein after the switching to a second scanning manner to scan the touch screen, the method further comprises: switching to the first scanning manner to scan the touch screen in response to detecting, in the second scanning manner, that the touch screen is not touched within a preset time period. ### Claim 19 (depends on 1) A mobile terminal implementing the method according to claim 1, comprising the touch screen, wherein the mobile terminal is configured to scan by using the first scanning manner with a high report rate to meet requirements for high response speed and low power consumption. ### Claim 20 (depends on 19) The mobile terminal according to claim 19, wherein the mobile terminal is configured to, after detecting that the touch screen is touched, scan by using the second scanning manner with a low report rate to meet requirement for accurate positioning.