# US 2020/0401254 A1 · Touch controller and associated chip, touch control system and touch control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401254 A1 - Document ID: US20200401254A1 - Status: Published application - Kind: A1 - Application number: 17/009,518 - Filed: 2020-09-01 - Published: 2020-12-24 - Earliest claimed: 2019-03-06 - Assignees: Shenzhen Goodix Technology Co., Ltd. - Applicants: Shenzhen Goodix Technology Co., Ltd. - Inventors: Hsin-Jui CHOU; Ya-Nan WEN; Po-Yuan WANG - Web page: https://patentgrep.com/patent/US20200401254A1 ## CPC - G06F 3/044: by capacitive means - 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)} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - H03K 17/962: {Capacitive touch switches} - H03K 2017/9613: {using two electrodes per touch switch} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H03K: PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) ## Abstract The application discloses a touch controller, configured to determine a position where a user touches a touchscreen, wherein the touchscreen includes a first transmitting electrode, a second transmitting electrode and a receiving electrode. The touch controller includes: a signal generation module, configured to perform an in-phase code transmission at a first time so that the receiving electrode receives an in-phase code receiving signal correspondingly, and perform an inverting-phase code transmission at a second time so that the receiving electrode receives an inverting-phase code receiving signal correspondingly; and a demodulation module, configured to determine the position where the user touches the touchscreen according to the in-phase code receiving signal corresponding to the first time and the inverting-phase code receiving signal corresponding to the second time. ## Claims ### Claim 1 A touch controller, configured to determine a position where a user touches a touchscreen, wherein the touchscreen includes a first transmitting electrode, a second transmitting electrode and a receiving electrode, and the touch controller comprises: a signal generation module, configured to perform an in-phase code transmission at a first time so that the receiving electrode receives an in-phase code receiving signal correspondingly, and perform an inverting-phase code transmission at a second time so that the receiving electrode receives an inverting-phase code receiving signal correspondingly, wherein when performing the in-phase code transmission, the signal generation module simultaneously generates a first transmitting signal having a first phase and a second transmitting signal having a second phase to the first transmitting electrode and the second transmitting electrode, respectively, and when performing the inverting-phase code transmission, the signal generation module simultaneously generates the second transmitting signal and the first transmitting signal to the first transmitting electrode and the second transmitting electrode, respectively; and a demodulation module, configured to determine the position where the user touches the touchscreen according to the in-phase code receiving signal corresponding to the first time and the inverting-phase code receiving signal corresponding to the second time. ### Claim 2 (depends on 1) The touch controller of claim 1, wherein the first transmitting signal and the second transmitting signal have the same frequency. ### Claim 3 (depends on 1) The touch controller of claim 1, wherein the first transmitting signal and the second transmitting signal have the same amplitude. ### Claim 4 (depends on 1) The touch controller of claim 1, wherein the first transmitting signal and the second transmitting signal are orthogonal to each other. ### Claim 5 (depends on 1) The touch controller of claim 1, wherein the signal generation module is further configured to perform an in-phase code transmission at a third time so that the receiving electrode receives an in-phase code receiving signal correspondingly. ### Claim 6 (depends on 5) The touch controller of claim 5, wherein the demodulation module further determines the position where the user touches the touchscreen according to the inverting-phase code receiving signal corresponding to the second time and the in-phase code receiving signal corresponding to the third time. ### Claim 7 (depends on 1) The touch controller of claim 1, wherein the first transmitting signal and the second transmitting signal are not orthogonal to each other. ### Claim 8 (depends on 7) The touch controller of claim 7, wherein the demodulation module further determines the position where the user touches the touchscreen according to the first phase and the second phase. ### Claim 9 (depends on 1) The touch controller of claim 1, wherein the first transmitting electrode and the second transmitting electrode are disposed adjacent to each other. ### Claim 10 (depends on 1) A chip, comprising: the touch controller of claim 1. ### Claim 11 (depends on 1) A touch control system, comprising: a touchscreen, including a first transmitting electrode, a second transmitting electrode and a receiving electrode, wherein the receiving electrode is coupled to the first transmitting electrode and the second transmitting electrode; and the touch controller of claim 1. ### Claim 12 A touch control method, configured to determine a position wherein a user touches a touchscreen, wherein the touchscreen includes a first transmitting electrode, a second transmitting electrode and a receiving electrode, and the touch control method comprises: performing an in-phase code transmission at a first time so that the receiving electrode receives an in-phase code receiving signal correspondingly, wherein when performing the in-phase code transmission, the signal generation module simultaneously generates a first transmitting signal having a first phase and a second transmitting signal having a second phase to the first transmitting electrode and the second transmitting electrode, respectively; performing an inverting-phase code transmission at a second time so that the receiving electrode receives an inverting-phase code receiving signal correspondingly, wherein when performing the inverting-phase code transmission, the signal generation module simultaneously generates the second transmitting signal and the first transmitting signal to the first transmitting electrode and the second transmitting electrode, respectively; and determining the position where the user touches the touchscreen according to the in-phase code receiving signal corresponding to the first time and the inverting-phase code receiving signal corresponding to the second time. ### Claim 13 (depends on 12) The touch control method of claim 12, wherein the first transmitting signal and the second transmitting signal have the same frequency. ### Claim 14 (depends on 12) The touch control method of claim 12, wherein the first transmitting signal and the second transmitting signal have the same amplitude. ### Claim 15 (depends on 12) The touch control method of claim 12, wherein the first transmitting signal and the second transmitting signal are orthogonal to each other. ### Claim 16 (depends on 12) The touch control method of claim 12, further comprises: performing an in-phase code transmission at a third time so that the receiving electrode receives an in-phase code receiving signal correspondingly. ### Claim 17 (depends on 16) The touch control method of claim 16, further comprising: determining the position where the user touches the touchscreen according to the inverting-phase code receiving signal corresponding to the second time and the in-phase code receiving signal corresponding to the third time. ### Claim 18 (depends on 12) The touch control method of claim 12, wherein the first transmitting signal and the second transmitting signal are not orthogonal to each other. ### Claim 19 (depends on 18) The touch control method of claim 18, further comprising: determining the position where the user touches the touchscreen according to the first phase and the second phase. ### Claim 20 (depends on 12) The touch control method of claim 12, wherein the first transmitting electrode and the second transmitting electrode are disposed adjacent to each other.