Driver integrated circuit for touch sensing and touch detection driving method thereof

Abstract

The invention provides a driver integrated circuit for touch sensing and a touch sensing driving method thereof. The driver integrated circuit includes a touch sensing control circuit. The touch sensing control circuit is used for driving the touch panel to execute a touch operation. The touch sensing control circuit is used for driving the touch panel to execute a first detection operation. When the touch signal is received, the touch sensing control circuit drives the touch panel to execute scanning operation. After the scanning operation is executed, the touch sensing control circuit drives the touch panel to execute a second detection operation. The sampling frequency of the second detection operation is higher than the sampling frequency of the first detection operation.

Description

Technical Field

[0001] The present invention relates to a driving circuit, and in particular to a driver integrated circuit for touch sensing and a touch detection driving method thereof. Background Art

[0002] For universal terminal devices with touch sensing, they may include a touch sensing control chip that independently communicates with the terminal's central processing unit. Therefore, when the terminal performs touch recognition operations, such as for gaming or continuous program operation, the chip controls the touch panel to perform touch detection and touch scanning at a fixed sampling frequency, for example, 240Hz. Summary of the Invention

[0003] The present invention provides a driver integrated circuit for touch sensing and a touch detection driving method thereof, which can quickly execute a corresponding touch detection mode according to a touch event to reduce the delay time of touch detection.

[0004] The driver integrated circuit of the present invention is suitable for driving a touch panel having a touch sensor. The driver integrated circuit includes a touch sensing control circuit. The touch sensing control circuit is configured to drive the touch panel to perform a touch operation. The touch sensing control circuit is configured to drive the touch panel to perform a first detection operation. In response to receiving a touch signal, the touch sensing control circuit drives the touch panel to perform a scanning operation. After performing the scanning operation, the touch sensing control circuit drives the touch panel to perform a second detection operation. The sampling frequency of the second detection operation is higher than the sampling frequency of the first detection operation.

[0005] The touch detection driving method of the present invention is applicable to a driver integrated circuit for touch sensing. The driver integrated circuit is suitable for driving a touch panel having a touch sensor and includes a touch sensing control circuit. The driver integrated circuit includes the following steps: driving the touch panel to perform a first detection operation via the touch sensing control circuit; receiving a touch signal via the touch sensing control circuit, and then driving the touch panel to perform a scanning operation via the touch sensing control circuit; and after the scanning operation, driving the touch panel to perform a second detection operation via the touch sensing control circuit, wherein the sampling frequency of the second detection operation is higher than the sampling frequency of the first detection operation.

[0006] Based on the above, according to the driver integrated circuit and touch detection driving method of the present invention, the driver integrated circuit can drive the touch panel through a variety of operating modes, thereby effectively reducing the delay of touch detection, and detect touch events through high-frequency sampling so that the driver integrated circuit can drive the touch panel to sensitively detect user touch events. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 FIG. 1 is a schematic diagram of a driver integrated circuit and a memory according to an embodiment of the present invention.

[0008] Figure 2 This is a first flow chart of the touch detection driving method according to an embodiment of the present disclosure.

[0009] Figure 3 1 is a first operation timing diagram and a voltage signal diagram according to an embodiment of the present invention.

[0010] Figure 4 FIG. 2 is a second flow chart of a touch detection driving method according to an embodiment of the present invention.

[0011] Figure 5 FIG. 2 is a second operation timing diagram of an embodiment of the present invention.

[0012] Figure 6 FIG. 4 is a third operation timing diagram of an embodiment of the present invention.

[0013] Figure 7 FIG. 1 is a schematic diagram of a touch sensing control circuit, an application program, and a touch panel according to an embodiment of the present invention.

[0014] Description of Reference Numerals

[0015] 100: Driver IC

[0016] 110: Touch sensing control circuit

[0017] 200: Memory

[0018] 210: Application Processor

[0019] 300: Touch panel

[0020] 720: Two-dimensional sensing array

[0021] 730: One-dimensional sensing array

[0022] 315, 515, 535, 615, 645: touch events

[0023] 325, 525, 625, 655: Stop touch events

[0024] 310, 350, 510, 610: First detection operation period

[0025] 320, 520, 540, 620, 650: During scanning operation

[0026] 330, 530, 550, 630, 660: Extended sensing operation period

[0027] 340, 560, 640, 670: Second detection operation period

[0028] AP, TP, EP, HP: Operation sequence

[0029] S210, S220, S230, S240, S250, S410, S420, S430, S440, S450, S460, S470, S480, S701, S702, S703, S704, S705, S706, S707, S708, S709: Steps DETAILED DESCRIPTION

[0030] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0031] The term "coupled (or connected)" used throughout the specification of this application (including the claims) may refer to any direct or indirect means of connection. For example, if the text describes a first device coupled (or connected) to a second device, it should be interpreted that the first device can be directly connected to the second device, or the first device can be indirectly connected to the second device through other devices or some connection means. The terms "first", "second", etc. mentioned in the entire specification of this application (including the claims) are used to name the components (element) or to distinguish different embodiments or scopes, and are not used to limit the upper or lower limit of the number of components, nor to limit the order of components. In addition, wherever possible, components / members / steps with the same numbers in the drawings and embodiments represent the same or similar parts. Components / members / steps with the same numbers or the same terms in different embodiments can refer to the relevant descriptions of each other.

[0032] It should be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present disclosure. Furthermore, it should be understood that the phraseology and terminology used herein are for descriptive purposes and should not be considered limiting. As used herein, the words "including," "comprising," or "having," and variations thereof, are intended to encompass the items listed thereafter and their equivalents as well as additional items. Unless otherwise limited, the terms "connected," "coupled," and "mounted," and variations thereof, as used herein, are used broadly and encompass direct and indirect connections, couplings, and mountings.

[0033] Figure 1 Schematic diagram of a driver integrated circuit and memory according to an embodiment of the present disclosure. Figure 1 , the driver integrated circuit 100 is coupled to the memory 200 and the touch panel 300 having a touch sensor. In addition, the driver integrated circuit 100 can be implemented in electronic devices such as mobile phones, computers and tablets. In an embodiment of the present disclosure, the driver integrated circuit 100 can be a fingerprint, touch and display driver integrated chip (FTDIIC). The driver integrated circuit 100 includes a touch sensing control circuit 110. The memory 200 stores an application 210. In an embodiment of the present disclosure, the touch sensing control circuit 110 and the application 210 are used to have a first direct communication therebetween to promote at least one of a touch sensing operation and a display operation. In another embodiment, the driver integrated circuit 100 is a touch display driver chip that can drive and sense touch events on the touch panel 300.

[0034] In the present invention, the touch panel 300 may be a liquid crystal display touch panel or an organic light emitting diode (OLED) touch panel, wherein the touch sensing circuit of the liquid crystal display touch panel is integrated with the display pixel array, while the OLED touch panel may have a separate touch circuit and display panel, or a capacitive or optical touch sensing circuit integrated into the OLED display panel.

[0035] The touch sensing control circuit 110 may include a readout circuit coupled to a plurality of touch sensing columns (e.g., touch detection electrode columns) of the touch display panel via a plurality of switches. Generally, the readout circuit includes an analog front end (AFE) circuit, an analog-to-digital converter (ADC), and / or other circuits. Based on a scanning operation, the readout circuit can read touch detection results from the touch display panel and output touch detection data corresponding to the touch detection results to the touch sensing control circuit 110.

[0036] The touch sensing control circuit 110 can execute an algorithm to process touch detection data, thereby obtaining the location of a touch event occurring on the touch display panel / touch panel 300. The touch sensing control circuit 110 also includes a timing controller and / or other driving circuits. The touch sensing control circuit 110 can control (or drive) the touch display panel to display one or more image frames. Based on the display driving operation of the touch display panel, the touch sensing control circuit 110 can correspondingly output a touch frame synchronization signal TSVD and a touch column synchronization signal TSHD. The touch frame synchronization signal TSVD and the touch column synchronization signal TSHD are periodic pulse signals, and each pulse indicates the start time of a touch sensing frame. The period of a touch frame synchronization signal TSVD can include the periods of N touch column synchronization signals TSHD, and one or more columns of touch electrodes (touch sensors) of the touch display panel 300 can be detected during each touch sensing period. N is a positive integer.

[0037] In one embodiment of the present disclosure, a touch frame synchronization signal TSVD is output once every five touch column synchronization signals TSHD are output, and the frequency of outputting the touch frame synchronization signal TSVD is 100 Hz to 500 Hz or other frequencies. For example, the frequency of outputting the touch frame synchronization signal TSVD may be 240 Hz.

[0038] In the first detection operation of the present disclosure, the touch sensing control circuit 110 can drive the touch panel 300 to perform a one-dimensional touch detection (i.e., perform touch sensing) when receiving each touch frame synchronization signal TSVD to obtain touch detection data corresponding to the one-dimensional touch detection. The one-dimensional touch detection in the present disclosure is to drive the touch panel 300 to perform touch detection only in the X-axis direction or only in the Y-axis direction, thereby detecting whether there is a touch event. The two-dimensional touch scanning in the present disclosure is to drive the touch panel 300 to scan the touch coordinates in the X-axis direction and the Y-axis direction.

[0039] In the second detection operation of the present disclosure, the touch sensing control circuit 110 can drive the touch panel 300 to perform a one-dimensional touch detection when receiving each touch column synchronization signal TSHD. Therefore, the touch sensing frequency of the second detection operation is five times the touch sensing frequency of the first detection operation.

[0040] In an embodiment of the present disclosure, the driver integrated circuit 100 may be coupled to the processing circuitry of the application 210 and the touch panel 300. In this embodiment, the application processor 210 is coupled to the driver integrated circuit 100 and the memory 200, and the application processor 210 may access the memory 200 to execute the application 210 stored in the memory 200, where the application 210 may be an operating system or a functional program. In an embodiment of the present disclosure, the fingerprint sensing control circuit may be used to drive the fingerprint sensor to perform fingerprint sensing operations. The display driver circuit may be used to drive the touch panel 300 to perform display operations. The touch sensing control circuit 110 may be used to drive the touch panel 300 to perform touch operations.

[0041] In an embodiment of the present disclosure, the touch panel 300 may be combined with the display panel to form a touch display panel, wherein the touch panel 300 may be placed under the display panel. In an embodiment of the present disclosure, the display panel may be, for example, a liquid crystal display (LCD), a light emitting diode (LED) display, or an organic light emitting diode (OLED) display. The display panel may, for example, include a pixel array, and the pixel array may include a plurality of display pixels configured into an array and a plurality of sensing pixels for fingerprint sensing. In an embodiment of the present disclosure, the driver integrated circuit 100 may include a processing circuit, and the processing circuit may be a touch panel 300 sensing chip (Touch with Display Driver, TDDI) of a terminal device. The terminal device may be a mobile phone or a tablet computer with a fingerprint sensing function, but the present disclosure is not limited thereto.

[0042] In an embodiment of the present disclosure, the touch sensing control circuit 110 can be used to receive touch event notifications from the touch panel 300 and notify the application 210 of the touch coordinates of the touch event. It should be noted that multiple interfaces exist between the touch panel 300, the touch sensing control circuit 110, and the memory 200 for direct communication with each other.

[0043] Figure 2 This is a first flow chart of the touch detection driving method according to an embodiment of the present disclosure. Figure 1 and Figure 2, the driver integrated circuit 100 may perform the following steps S210 to S250 to perform touch detection operations in the touch operation of the terminal device. The driver integrated circuit 100 may establish direct communication to facilitate at least one of a touch sensing operation and a display operation. In an embodiment of the present disclosure, when a touch object (e.g., a user's finger) is placed on the touch panel 300 to trigger a touch event, the touch sensing control circuit 110 further outputs touch data to the application 210 based on the touch event on the touch panel 300, so that the application 210 generates or obtains touch coordinates.

[0044] In step S210, the touch sensing control circuit 110 is coupled to the processor of the application 110 and is used to drive the touch panel 300 to perform a first detection operation. The first detection operation is to detect whether a touch event occurs on the touch panel 300. Then, when the touch panel 300 detects a touch event, a touch signal is sent to the touch sensing control circuit 110. A touch event is, for example, a user clicking or operating the touch panel 300 with a finger. In step S230, the touch sensing control circuit 110 receives the touch signal. In step S240, the touch sensing control circuit 110 drives the touch panel 300 to perform a scanning operation. The scanning operation is for the touch panel 300 to perform two-dimensional touch detection and determine the touch coordinates of the touch event on the touch display panel 300, and then input the touch coordinates into the application 210.

[0045] In another embodiment of the present disclosure, step S220 may be further included between step S210 and step S230. In step S220, when the touch panel 300 performs the first detection operation, the processor of the application 210 outputs a mode signal to the touch sensing control circuit 110, so that the touch sensing control circuit 110 drives the touch panel 300 to perform the second detection operation. The mode signal may be a game mode signal, a high detection mode signal, or a high sensitivity mode signal. In another embodiment, the application 210 outputs a second mode signal to the touch sensing control circuit 110, so that the touch sensing control circuit 110 drives the touch panel 300 to perform the first detection operation again. The second mode signal may be a general mode signal, an exit game mode signal, or a power saving mode signal.

[0046] In step S250, after performing the scanning operation, the touch sensing control circuit 110 drives the touch panel 300 to perform a second detection operation. The sampling frequency of the second detection operation is higher than the sampling frequency of the first detection operation. The sampling frequency of the second detection operation is 2 to 7 times the sampling frequency of the first detection operation. For example, the sampling frequency of the second detection operation is 1000 Hz to 1200 Hz, and the sampling frequency of the first detection operation is 220 Hz to 240 Hz. Therefore, by detecting a touch event or receiving a first mode signal to drive the touch panel 300 to perform the second detection operation, the touch panel 300 detects touch events at a high sampling frequency. Therefore, the driver integrated circuit 100 can quickly detect touch events to improve the smoothness of operating the touch panel 300 and reduce delays. In addition, a more detailed implementation scheme of the driver integrated circuit 100 will be further illustrated by the following multiple embodiments.

[0047] Figure 3 1 is a first operation timing diagram and a voltage signal diagram of an embodiment of the present disclosure. Figure 4 This is a second flow chart of the touch detection driving method according to an embodiment of the present disclosure. Figure 1 、 Figure 3 as well as Figure 4 , Figure 1 The touch panel 300 and the driving integrated circuit 100 are adapted to perform steps S410 to S480 to perform a detection operation of the touch panel 300. Figure 3 as well as Figure 4 As shown, in step S410, the touch sensing control circuit 110 drives the touch panel 300 to perform the first detection operation 310. In step S420, while the touch panel 300 performs the first detection operation 310, the touch sensing control circuit 110 determines whether a touch signal is received.

[0048] When the touch panel 300 detects a touch event 315, the touch panel 300 sends a touch signal to the touch sensing control circuit 110, so that the touch sensing control circuit 110 receives the touch signal and executes step S430. In step S430, in response to receiving the touch signal, the touch sensing control circuit 110 drives the touch panel 300 to perform a scanning operation 320. The length of the touch panel 300 performing the scanning operation 320 depends on the duration of the touch event 315. In step S440, the touch sensing control circuit 110 determines whether a touch signal is received. In other words, when the user continues to press the touch panel 300, the touch panel 300 continues to perform the scanning operation 320. In step S440, in response to the touch sensing control circuit 110 not receiving the touch signal, the touch sensing control circuit 110 then executes step S450. Figure 3As shown, the touch sensing control circuit 110 determines that no touch signal is received, and thus detects the touch stop event 325 .

[0049] In step S450, the touch sensing control circuit 110 drives the touch panel 300 to perform an extended operation 330. In an embodiment of the present disclosure, the extended sensing period of the extended operation 330 can be between 1 second and 5 seconds. In one embodiment, the extended sensing period of the extended operation 330 is 2 seconds. The extended operation 330 is for the touch sensing control circuit 110 to drive the touch panel 300 to continuously perform two-dimensional scanning to detect touch events, and output touch coordinate signals to the application 210 in real time. In step S460, while the touch panel 300 is performing the extended operation 330, the touch sensing control circuit 110 determines whether a touch signal is received. In step S460, when a touch event is detected while the touch panel 300 is performing the extended operation 330, the touch sensing control circuit 110 drives the touch panel 300 to repeat step S430.

[0050] In step S460, if no touch event is detected while the touch panel 300 is performing the extended operation 330, step S470 is then executed. In step S470, the touch sensing control circuit 110 drives the touch panel 300 to perform the second detection operation 340. In step S480, when the touch panel is performing the second detection operation 340, the touch sensing control circuit 110 determines whether a touch signal is received. In response to the touch sensing control circuit 110 receiving a touch signal in step S480, the touch sensing control circuit 110 repeatedly executes step S430. The second detection operation is that the touch sensing control circuit 110 drives the touch panel 300 to perform a one-dimensional scan during the high-frequency sampling period. In one embodiment of the present disclosure, the detection period of the second detection operation 340 is 2 to 6 times the extended sensing period EP of the extended operation 330. The detection period of the second detection operation 340 can be 2 to 15 seconds. For example, the detection period of the second detection operation 340 (i.e., the high-frequency sampling period) is 8 seconds.

[0051] In response to the touch sensing control circuit 110 not receiving the touch signal in step S480, the touch sensing control circuit 110 drives the touch panel 300 to perform the first detection operation 350. The first detection operation (310, 350) and the second detection operation 340 are the touch sensing control circuit 110 driving the touch panel 300 to perform detection only in the X-axis direction or only in the Y-axis direction to detect whether there is a touch event. Figure 3As shown in the voltage signal diagram, the first detection operation 310 has an operation period AP, the scanning operation 320 has a scanning period TP, the extension operation 330 has an extended sensing period EP, the second detection operation 340 has a detection period HP, and the first detection operation 350 has a detection period AP.

[0052] Figure 5 This is a second operation timing diagram of an embodiment of the present disclosure. Figure 1 、 Figure 4 as well as Figure 5 .like Figure 5 As shown, when a touch event 515 is detected while the touch panel is performing a first detection operation 510, the touch sensing control circuit 110 drives the touch panel 300 to perform a scanning operation 520. In another embodiment of the present disclosure, the touch sensing control circuit 110 may receive a first mode signal from the application 210 and further drive the touch panel 300 to perform a second detection operation. When the touch panel 300 is performing the second detection operation, upon receiving a touch signal, the touch sensing control circuit 110 similarly drives the touch panel 300 to perform the scanning operation 520.

[0053] When the touch sensing control circuit 110 detects the end of the touch event 515 (i.e., the touch stop event 525) through the touch panel 300, it then performs an extension operation 530. In another embodiment of the present disclosure, while the touch panel 300 is performing the extension operation 530, the touch sensing control circuit 110 detects another touch event 535 and drives the touch panel 300 to perform a scan operation 540.

[0054] like Figure 1 、 Figure 4 as well as Figure 5 As shown, during the period when the touch panel 300 performs the scanning operation 540, the touch sensing control circuit 110 detects that the touch event 535 stops, and then drives the touch panel 300 to perform the extension operation 550. During the period when the touch panel 300 performs the extension operation 550, and the touch sensing control circuit 110 does not receive a touch signal, the touch sensing control circuit 110 drives the touch panel 300 to perform the second detection operation 560.

[0055] Figure 6 This is a third operation timing diagram of an embodiment of the present disclosure. Figure 1 、 Figure 4 as well as Figure 6 .like Figure 6As shown, the touch sensing control circuit 110 drives the touch panel 300 to perform a first detection operation 610. Furthermore, the touch sensing control circuit 110 detects a touch event 615, and then drives the touch panel 300 to perform a scanning operation 620 until a touch stop event 625 is detected. Figure 6 As shown, the touch sensing control circuit 110 detects a touch stop event 625 and then drives the touch panel 300 to perform an extension operation 630. After the touch panel 300 performs the extension operation 630 for a prolonged sensing period, the touch sensing control circuit 110 drives the touch panel 300 to perform a second detection operation 640 to detect a touch event using a high-frequency sampling mode.

[0056] exist Figure 6 In the illustrated embodiment, the touch sensing control circuit 110 detects a touch event 645 while the touch panel 300 is performing the second detection operation 640, and then performs the scan operation 650 again. Furthermore, after the touch event 645 ceases (i.e., a touch stop event 655), the touch sensing control circuit 110 then performs the extension operation 660 and the second detection operation 670.

[0057] Figure 7 FIG is a schematic diagram of a touch sensing control circuit, an application program, and a touch panel according to an embodiment of the present disclosure. Figure 1 、 Figure 2 as well as Figure 7 As shown, the driver integrated circuit 100 may perform the following steps S701 to S709 to perform different touch detection operations on the touch panel 300. Figure 7 As shown, the touch panel 300 can perform one-dimensional touch detection in the X-axis direction or the Y-axis direction only through the sensing array, or perform two-dimensional touch detection in the X-axis and Y-axis directions through the sensing array. Two-dimensional touch detection is a two-dimensional touch scan. When no mode signal and touch event are received, the touch panel 300 performs a first detection operation. In step S701, the application 210 outputs a first mode signal to the touch sensing control circuit 110. In step S702, the touch sensing control circuit 110 transmits a drive signal to the touch panel 300 based on the first mode signal.

[0058] In step S703, the touch panel 300 performs a corresponding scanning method based on the touch signal. The scanning method includes touch detection and touch scanning. Touch scanning is a two-dimensional scan performed by the sensing array along the X-axis and Y-axis. In step S704, while the touch panel 300 performs the two-dimensional scan, the touch panel 300 outputs the touch coordinate parameters of the touch event to the touch sensing control circuit 110 (i.e., step S708). In step S709, the touch sensing control circuit 110 outputs the touch coordinate parameters to the application 210.

[0059] The touch detection scan is a one-dimensional scan performed only along the X-axis or Y-axis sensing arrays. In step S705 , while the touch panel 300 performs the touch detection scan, the touch panel 300 outputs a touch signal to the touch sensing control circuit 110 (i.e., step S706 ).

[0060] After the touch sensing control circuit 110 receives the touch signal, the touch sensing control circuit 110 then executes step S707. In step S707, the touch sensing control circuit 110 outputs a scan drive signal to the touch panel 300 to drive the touch panel 300 to perform a scan operation (i.e., touch scan). In addition, the driver integrated circuit 100 can be integrated into an electronic device and electrically connected to the processor and memory 200 of the electronic device. The electronic device can be a smart phone, a tablet, a computer, etc. The processor can execute a client application (CA) or other application 210, and the present disclosure is not limited to this.

[0061] Therefore, in the embodiment of the present disclosure, the driver integrated circuit 100 and the electronic device can effectively reduce the delay of touch detection by executing the above steps S701 to S709, and detect touch events through high-frequency sampling, so that the driver integrated circuit 100 can drive the touch panel 300 to sensitively detect the user's touch events. In other words, compared with the conventional detection operation, because the driver integrated circuit 100 drives the touch panel 300 to detect touch events through high-frequency sampling for a period of time after the user touch stops (i.e., the extended sensing period of the extended operation and the execution period of the second detection operation), the touch delay is effectively reduced.

[0062] In summary, the driver integrated circuit for touch sensing and the touch detection driving method thereof disclosed in the present invention can extend the driving signals of the operation and the second detection operation so that the touch panel switches the scanning mode according to the driving signals, thereby reducing the delay time of touch detection and improving user satisfaction.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A driver integrated circuit for touch sensing, characterized in that: Suitable for driving a touch panel having a touch sensor, wherein the driver integrated circuit comprises: A touch sensing control circuit is coupled to the application processor and is used to drive the touch panel to perform a first detection operation. The touch sensing control circuit receives a touch signal and drives the touch panel to perform a scanning operation. After the scanning operation is performed, the touch sensing control circuit drives the touch panel to perform a second detection operation, wherein a sampling frequency of the second detection operation is higher than a sampling frequency of the first detection operation.

2. The driver integrated circuit for touch sensing according to claim 1, wherein: When the touch panel performs the second detection operation, the touch sensing control circuit determines whether the touch signal is received. In response to the touch sensing control circuit receiving the touch signal, the touch sensing control circuit drives the touch panel to perform the scanning operation, In response to the touch sensing control circuit determining that the touch signal is not received, the touch sensing control circuit drives the touch panel to perform the first detection operation.

3. The driver integrated circuit for touch sensing according to claim 1, wherein: When the touch panel performs the first detection operation, the touch sensing control circuit determines whether the touch signal is received. In response to the touch sensing control circuit receiving the touch signal, the touch sensing control circuit drives the touch panel to perform the scanning operation.

4. The driver integrated circuit for touch sensing according to claim 1, wherein: After the touch sensing control circuit drives the touch panel to perform the scanning operation, the touch sensing control circuit drives the touch panel to perform an extension operation, wherein the extension operation is that the touch panel performs two-dimensional scanning during an extended sensing period.

5. The driver integrated circuit for touch sensing according to claim 4, wherein: When the touch panel performs the first detection operation, the application processor outputs a mode signal to the touch sensing control circuit so that the touch sensing control circuit drives the touch panel to perform the second detection operation, wherein the sampling frequency of the second detection operation is 2 to 7 times the sampling frequency of the first detection operation, and the detection period of the second detection operation is 2 to 6 times the extended sensing period.

6. The driver integrated circuit for touch sensing according to claim 4, wherein: The scanning operation is that the touch sensing control circuit drives the touch panel to perform the two-dimensional scanning to generate a touch coordinate signal. The touch sensing control circuit receives the touch coordinate signal and then outputs the touch coordinate signal to the application processor.

7. The driver integrated circuit for touch sensing according to claim 4, wherein: The touch panel performs one of the scanning operation and the extending operation, and when the touch sensing control circuit receives the touch signal, the touch sensing control circuit drives the touch panel to perform the scanning operation.

8. The driver integrated circuit for touch sensing according to claim 1, wherein: The first detection operation is that the touch sensing control circuit drives the touch panel to perform one-dimensional scanning.

9. The driver integrated circuit for touch sensing according to claim 8, wherein: The second detection operation is that the touch sensing control circuit drives the touch panel to perform the one-dimensional scanning during a high-frequency sampling period.

10. The driver integrated circuit for touch sensing according to claim 9, wherein: When the touch sensing control circuit drives the touch panel to perform the one-dimensional scan, the touch panel generates the touch signal in response to a touch event on the touch panel, and then outputs the touch signal to the touch sensing control circuit.

11. A touch detection driving method, suitable for a driver integrated circuit for touch sensing, wherein the driver integrated circuit is suitable for driving a touch panel having a touch sensor, wherein the driver integrated circuit comprises: driving the touch panel via a touch sensing control circuit to perform a first detection operation; receiving a touch signal through the touch sensing control circuit, and then driving the touch panel to perform a scanning operation through the touch sensing control circuit; After the scanning operation is performed, the touch panel is driven by the touch sensing control circuit to perform a second detection operation, wherein a sampling frequency of the second detection operation is higher than a sampling frequency of the first detection operation.

12. The touch detection driving method according to claim 11, wherein: The step of performing the second detection operation by the touch panel includes: Determining whether the touch signal is received by the touch sensing control circuit; In response to the touch sensing control circuit receiving the touch signal, driving the touch panel to perform the scanning operation through the touch sensing control circuit; In response to the touch sensing control circuit determining that the touch signal is not received, the touch sensing control circuit drives the touch panel to perform the first detection operation.

13. The touch detection driving method according to claim 11, wherein: The step of the touch panel performing the first detection operation includes: Determining whether the touch signal is received by the touch sensing control circuit; In response to the touch sensing control circuit receiving the touch signal, the touch sensing control circuit drives the touch panel to perform the scanning operation.

14. The touch detection driving method according to claim 11, wherein: After the touch sensing control circuit drives the touch display panel to perform the scanning operation, the method includes: The touch sensing control circuit drives the touch panel to perform an extended operation, wherein the extended operation is that the touch panel performs two-dimensional scanning during an extended sensing period.

15. The touch detection driving method according to claim 14, further comprising: When the first detection operation is performed by the touch panel, a mode signal is output to the touch sensing control circuit through the application processor; driving the touch panel via the touch sensing control circuit to perform the second detection operation, wherein the sampling frequency of the second detection operation is 2 to 7 times the sampling frequency of the first detection operation, The detection period of the second detection operation is 2 to 6 times the extended sensing period.

16. The touch detection driving method according to claim 14, wherein: The scanning operation is to drive the touch panel to perform the two-dimensional scanning by the touch sensing control circuit to generate a touch coordinate signal; The touch coordinate signal is received by the touch sensing control circuit, and then the touch coordinate signal is output to the application processor.

17. The touch detection driving method according to claim 14, wherein: One of the scanning operation and the extending operation is performed by the touch panel, and when the touch signal is received by the touch sensing control circuit, the touch panel is driven by the touch sensing control circuit to perform the scanning operation.

18. The touch detection driving method according to claim 11, wherein: The first detection operation is to drive the touch panel to perform one-dimensional scanning through the touch sensing control circuit.

19. The touch detection driving method according to claim 18, wherein: The second detection operation is that the touch sensing control circuit drives the touch panel to perform the one-dimensional scanning during a high-frequency sampling period.

20. The touch detection driving method according to claim 19, wherein: The step of driving the touch panel to perform the one-dimensional scanning by the touch sensing control circuit includes: The touch panel generates the touch signal in response to a touch event on the touch panel, and then outputs the touch signal to the touch sensing control circuit.

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