# US 11,442,575 B2 · Touch display driving apparatus and operation method thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,575 B2 - Document ID: US11442575B2 - Status: Granted - Kind: B2 - Application number: 17/008,680 - Filed: 2020-09-01 - Published: 2021-03-04 - Granted: 2022-09-13 - Earliest claimed: 2019-09-01 - Assignees: Novatek Microelectronics Corp. - Applicants: Novatek Microelectronics Corp. - Inventors: Yi-Chia Hsu; Hsiang-Cheng Yu; Chin-Lin Lee - Web page: https://patentgrep.com/patent/US11442575B2 ## CPC - 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 3/0412: {Digitisers structurally integrated in a display} - 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 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/044: by capacitive means - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract The disclosure provides a touch display driving apparatus and an operation method thereof. The touch display driving apparatus is configured to drive a touch display panel. The touch display driving apparatus includes a touch sensing circuit configured to output a touch driving signal to a touch sensor array of the touch display panel, and receive touch sensing signals from the touch sensor array. The touch driving signal is configured to scan the touch sensor array at a normal scan rate in a normal touch scanning mode, and scan, in response to a touch event which is determined as occurring in a doze mode, the touch sensor array at a first scan rate in a fast touch scanning mode immediately preceding to the normal touch scanning mode, wherein the first scan rate is greater than the normal scan rate. ## Claims ### Claim 1 A touch display driving apparatus, configured to drive a touch display panel, comprising: a touch sensing circuit configured to output a touch driving signal to a touch sensor array of the touch display panel, and receive a plurality of touch sensing signals from the touch sensor array, wherein the touch driving signal is configured to scan the touch sensor array at a normal scan rate in a normal touch scanning mode, and scan, in response to a touch event which is determined as occurring in a doze mode, the touch sensor array at a first scan rate in a fast touch scanning mode immediately preceding the normal touch scanning mode, wherein the first scan rate is greater than the normal scan rate, wherein the touch driving signal is further configured to scan the touch sensor array at a second scan rate in the doze mode to determine whether the touch event occurs, wherein the second scan rate in the doze mode is greater than the normal scan rate. ### Claim 2 (depends on 1) The touch display driving apparatus according to claim 1, wherein the second scan rate is greater than the first scan rate. ### Claim 3 (depends on 1) The touch display driving apparatus according to claim 1, wherein the touch driving signal comprises a first repetitive waveform corresponding to the first scan rate in the fast touch scanning mode and a normal repetitive waveform corresponding to the normal scan rate in the normal touch scanning mode, and wherein the first repetitive waveform is different from the normal repetitive waveform. ### Claim 4 (depends on 3) The touch display driving apparatus according to claim 3, wherein the touch driving signal further comprises a second repetitive waveform corresponding to the second scan rate in the doze mode, and wherein the second scan rate in the doze mode is greater than the normal scan rate and the second repetitive waveform is different from the normal repetitive waveform. ### Claim 5 The touch display driving apparatus according to claim further comprising: a control circuit, coupled to the touch sensing circuit to receive touch sensing information which is generated by the touch sensing circuit according to the plurality of touch sensing signals, and configured to generate a touch coordinate based on the touch sensing information. ### Claim 6 (depends on 1) The touch display driving apparatus according to claim 1, wherein the fast touch scanning mode lasts until a next pulse of a display frame synchronization signal. ### Claim 7 An operation method of a touch display driving apparatus, comprising: outputting, by a touch sensing circuit, a touch driving signal to a touch sensor array of a touch display panel, wherein the touch driving signal is configured to scan the touch sensor array at a normal scan rate in a normal touch scanning mode, and scan, in response to a touch event which is determined as occurring in a doze mode, the touch sensor array at a first scan rate in a fast touch scanning mode immediately preceding the normal touch scanning mode, wherein the first scan rate is greater than the normal scan rate; and receiving, by the touch sensing circuit, a plurality of touch sensing signals from the touch sensor array, wherein the touch driving signal is further configured to scan the touch sensor array at a second scan rate in the doze mode to determine whether the touch event occurs, wherein the second scan rate in the doze mode is greater than the normal scan rate. ### Claim 8 (depends on 7) The operation method according to claim 7, wherein the second scan rate is greater than the first scan rate. ### Claim 9 (depends on 7) The operation method according to claim 7, wherein the touch driving signal comprises a first repetitive waveform corresponding to the first scan rate in the fast touch scanning mode and a normal repetitive waveform corresponding to the normal scan rate in the normal touch scanning mode, and wherein the first repetitive waveform is different from the normal repetitive waveform. ### Claim 10 (depends on 9) The operation method according to claim 9, wherein the touch driving signal further comprises a second repetitive waveform corresponding to the second scan rate in the doze mode, and wherein the second scan rate in the doze mode is greater than the normal scan rate and the second repetitive waveform is different from the normal repetitive waveform. ### Claim 11 (depends on 7) The operation method according to claim 7, further comprising: receiving, by a control circuit, touch sensing information from the touch sensing circuit, wherein the touch sensing information is generated by the touch sensing circuit according to the plurality of touch sensing signals, and generating, by the control circuit, a touch coordinate based on the touch sensing information. ### Claim 12 (depends on 7) The operation method according to claim 7, wherein the fast touch scanning mode lasts until a next pulse of a display frame synchronization signal.