TOUCH INDICATOR PANEL, CONTROL METHOD AND TOUCH INDICATOR DEVICE

Description

TECHNICAL FIELD

[0001] This application relates to the field of display technologies, and in particular to a touch display panel, a drive method, and a touch display apparatus.BACKGROUND

[0002] A touch display panel is a display panel that integrates touch and display. Because the touch display panel can provide a human-computer interactive interface and allow execution of input by using a touch medium such as a finger, the touch display panel is used more directly and is more user-friendly. Therefore, the touch display panel is more widely used in various display apparatuses.

[0003] Usually, a touch scanning signal is provided to a touch electrode in the touch display panel, to charge a touch capacitor corresponding to the touch electrode.

[0004] However, as a touch sampling rate of the touch display panel is increasingly higher, charging time for the touch capacitor is increasingly shorter. When the charging time for the touch capacitor is short, the capacitor is undercharged, that is, the touch capacitor may not be charged to a target value. This undoubtedly affects sensitivity of touch, and further affects user experience. CN113126824A discloses a touch display panel, its driving method, and related display device. CN107843996A discloses a touch display panel with integrated touch electrodes and signal lines. US20210342035A1 discloses a touch display substrate using organic LEDs and storage capacitors.SUMMARY

[0005] To resolve the foregoing technical problem, this application provides a touch display panel, a drive method, and a touch display apparatus, to improve sensitivity of touch and user experience.

[0006] Correspondingly, the touch display panel, the touch display apparatus and the drive method thereof being defined by the independent claims.BRIEF DESCRIPTION OF DRAWINGS

[0007] FIG. 1 is a schematic diagram of a structure of a touch display apparatus according to an embodiment of this application; FIG. 2 is a schematic diagram of a structure of a touch display panel according to an embodiment of this application; FIG. 3 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 4 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 5 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 6 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 7 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 8 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 9 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 10 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 11 is a schematic diagram of another structure of a touch display panel according to an embodiment of this application; FIG. 12 is a schematic diagram of a structure of a film layer of a touch display panel according to an embodiment of this application; and FIG. 13 is a schematic diagram of another structure of a film layer of a touch display panel according to an embodiment of this application. DESCRIPTION OF EMBODIMENTS

[0008] The following clearly and completely describes technical solutions in embodiments of this application with reference to accompanying drawings in embodiments of this application. Clearly, the described embodiments are some rather than all of embodiments of this application. All other embodiments obtained by a person of ordinary skill in the art based on embodiments of this application without creative efforts shall fall within the protection scope of this application.

[0009] In this specification, the term "and / or" is merely an association relationship that describes associated objects, and represents that there may be three relationships. For example, A and / or B may represent three cases: only A exists, both A and B exist, and only B exists.

[0010] In the specification and the claims of embodiments of this application, terms such as "first" and "second" are used to distinguish between different objects, but are not used to describe a particular sequence of the objects. For example, a first target object, a second target object, and the like are used to distinguish between different target objects, but are not used to describe a particular order of the target objects.

[0011] In embodiments of this application, words such as "example" or "for example" are used to represent giving an example, an illustration, or a description. Any embodiment or design solution described as "example" or "for example" in embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design solutions. Exactly, use of the word such as "example" or "for example" is intended to present a related concept in a specific manner.

[0012] In the description of embodiments of this application, unless otherwise specified, the meaning of "a plurality of" means two or more. For example, "a plurality of processing units" means two or more processing units, and "a plurality of systems" means two or more systems.

[0013] An embodiment of this application provides a touch display apparatus. The touch display apparatus provided in this embodiment of this application may be a display apparatus that may enable a touch function, such as a television, a tablet computer, a personal digital assistant (personal digital assistant, PDA), a vehicle-mounted computer, a mobile phone, a smart wearable device, a smart home device, or the like. A specific form of the touch display apparatus is not particularly limited in this embodiment of this application. As shown in FIG. 1, for ease of description, an example in which the touch display apparatus is a mobile phone is used below for description.

[0014] As shown in FIG. 1, a mobile phone 1 includes a touch display panel 100, a middle frame 200, and a rear housing 300. The touch display panel 100 may be, for example, a liquid crystal display (Liquid Crystal Display, LCD) panel, an organic light emitting diode (Organic Light Emitting Diode, OLED) display panel, and an LED display panel. The LED display panel includes, for example, a Micro-LED display panel, a Mini-LED display panel, or the like. A type of the touch display panel 100 is not limited in this embodiment of this application.

[0015] As shown in FIG. 2, a touch display panel 100 includes, for example, a display area AA and a non-display area NAA. The display area AA includes a plurality of touch areas TT. The touch display panel 100 further includes a plurality of touch electrodes 10 disposed in the touch area TT. A self-capacitor is formed between the touch electrode 10 and a ground. When a finger touches the touch display panel 100, an external capacitor formed by a touch of the finger changes capacitance of the self-capacitor formed between the touch electrode 10 and the ground. When the capacitance of the self-capacitor is detected, a touch drive chip 20 located in the non-display area NAA provides a touch scanning signal to touch electrodes 10 in different touch areas TT at different time points through touch traces 30. For example, the plurality of touch areas TT include a first touch area TT1, a second touch area TT2, a third touch area TT3, and a fourth touch area TT4. In a touch frame, scanning of all touch electrodes 10 in the four touch areas TT in the touch display panel 100 are to be completed. Specifically, at a first time point, the touch scanning signal is provided to a plurality of touch electrodes 10 in the first touch area TT1; at a second time point, the touch scanning signal is provided to a plurality of touch electrodes 10 in the second touch area TT2; at a third time point, the touch scanning signal is provided to a plurality of touch electrodes 10 in the third touch area TT3; and at a fourth time point, the touch scanning signal is provided to a plurality of touch electrodes 10 in the fourth touch area TT4. The touch drive chip 20 receives a touch detection signal fed back from the touch electrode 10 through the touch trace 30, and determines a touch position based on the touch detection signal.

[0016] It should be noted that the touch drive chip 20 may be disposed on the touch display panel 100, may not be disposed on the touch display panel 100, or may alternatively be disposed at another position of the mobile phone 1. A position of the touch drive chip 20 is not limited in this embodiment of this application. In addition, the touch drive chip 20 and a display drive chip may be integrated in a chip, or may be separately disposed. This is not limited in this embodiment of this application. In this embodiment of this application, an example in which the touch drive chip 20 is disposed on the touch display panel 100 and the touch drive chip 20 and the display drive chip are integrated in a chip is used below for description.

[0017] It should be further noted that, the foregoing example in which the touch electrode 10 in the touch display panel 100 is a self-capacitance touch electrode is used for description, and does not constitute a limitation on this application. In another optional embodiment of this application, the touch electrode 10 may alternatively be a mutual-capacitance touch electrode.

[0018] For example, refer to FIG. 3. A touch electrode 10 includes a mutual-capacitance touch electrode. The mutual-capacitance touch electrode includes a plurality of touch drive electrodes 11 and a plurality of touch detection electrodes 12. The plurality of touch drive electrodes 11 extend in a first direction and are arranged in a second direction. The plurality of touch detection electrodes 12 extend in the second direction and are arranged in the first direction. The first direction may be, for example, a Y direction, the second direction may be, for example, an X direction. For example, the X direction and the Y direction are perpendicular to each other. Projections of the touch drive electrodes 11 and projections of the touch detection electrodes 12 are overlapped, and a mutual capacitor may be formed at an intersection of two groups of electrodes. When a finger touches a touch display panel 100, an electrical connection between two electrodes near a touch point is affected. This changes capacitance between the two electrodes. When capacitance of the mutual capacitor is detected, a touch scanning signal is to be sent to the touch drive electrodes 11 in sequence. For example, the plurality of touch drive electrodes 11 includes a first touch drive electrode 111, a second touch drive electrode 112, a third touch drive electrode 113, and a fourth touch drive electrode 114. In a touch frame, scanning of four touch drive electrodes 11 in the touch display panel 100 is to be completed. Specifically, at a first time point, the touch scanning signal is provided to the first touch drive electrode 111; at a second time point, the touch scanning signal is provided to the second touch drive electrode 112; at a third time point, the touch scanning signal is provided to the third touch drive electrode 113; and at a fourth time point, the touch scanning signal is provided to the fourth touch drive electrode 114. A touch drive chip 20 receives a touch detection signal fed back from the touch detection electrode 12 through a touch trace 30, and determines a touch position based on the touch detection signal.

[0019] When the touch electrode 10 is the mutual-capacitance touch electrode, as shown in FIG. 3, the touch drive electrodes 11 and the touch detection electrodes 12 may be located in different film layers. Alternatively, refer to FIG. 4. The touch drive electrodes 11 and the touch detection electrodes 12 are disposed in a same film layer, and an electrical connection between the touch drive electrodes 11 is implemented through a cross-bridge structure 13. When the touch drive electrodes 11 and the touch detection electrodes are disposed in the same film layer, a principle of detection is the same as a principle of detection when the touch drive electrodes 11 and the touch detection electrodes 12 are disposed in different film layers. Details are not described herein again.

[0020] It should be noted that, when the touch electrode 10 is a self-capacitance touch electrode, a position at which the touch trace 30 is disposed is not limited in this embodiment of this application, provided that an electrical connection between the touch electrode 10 and a touch drive chip 20 may be implemented through the touch trace 30. For example, the touch trace 30 is electrically connected to the touch electrode 10 by routing on a side of the touch drive chip 20. Similarly, when the touch electrode 10 is the mutual-capacitance touch electrode, a position at which the touch trace 30 is electrically connected to the touch drive electrode 11 and a position at which the touch trace 30 is electrically connected to the touch detection electrode 12 are not limited in this embodiment of this application, provided that an electrical connection between the touch drive electrode 10 and the touch drive chip 20 may be implemented through the touch trace 30 and an electrical connection between the touch detection electrode 12 and the touch drive chip 20 may be implemented through the touch trace 30. For example, some of the touch traces 30 route along a non-display area NAA of the display panel 100 from the touch drive chip 20 and are electrically connected to the touch detection electrodes 12, and some of touch traces 30 route on the side of the touch drive chip 20 from the touch drive chip 20 and are electrically connected to the touch drive electrodes 11. Alternatively, some of the touch traces 30 route on an opposite side of the touch drive chip 20 from the touch drive chip 20 and are electrically connected to the touch drive electrodes 11.

[0021] It should be noted that, when the touch electrode 10 is the mutual-capacitance touch electrode, an example in which the touch drive electrodes 11 and the touch detection electrodes 12 are located in the different film layers is used below for description.

[0022] In addition, refer to FIG. 5. The touch display panel 100 provided in an embodiment of this application further includes a multiplexing circuit 40. The multiplexing circuit 40 includes, for example, four multiplexing selection units 41. The four multiplexing selection units 41 each include, for example, four transistors 42. Transistors 42 located in a first row in the four multiplexing selection units 41 are electrically connected to touch electrodes 10 in a first touch area TT1 respectively, transistors 42 located in a second row in the four multiplexing selection units 41 are electrically connected to touch electrodes 10 in a second touch area TT2 respectively, transistors 42 located in a third row in the four multiplexing selection units 41 are electrically connected to touch electrodes 10 in a third touch area TT3 respectively, and transistors 42 located in a fourth row in a four multiplexing selection units 41 are electrically connected to touch electrodes 10 in a fourth touch area TT4 respectively. Because an input end of one multiplexing selection unit 41 is electrically connected to a pin of a touch drive chip 20, a quantity of pins of the touch drive chip 20 may be reduced due to disposing of the multiplexing circuit 40.

[0023] It should be noted that an example in which no multiplexing circuit 40 is disposed in the touch display panel 100 is used below for description.

[0024] To resolve the problem in the Background, the touch display panel provided in this embodiment of this application further includes an auxiliary electrode. When a capacitor (a self-capacitor or a mutual capacitor) is to be charged, a touch electrode receives a touch scanning signal, and the auxiliary electrode further provides an auxiliary signal to the touch electrode, to improve charging efficiency. Even if charging time for the capacitor is short, the capacitor may be quickly charged to a target value. This resolves a problem that the capacitor is undercharged when the charging time for the capacitor is short, improving sensitivity of touch. When the touch display panel is used in a device such as a vehicle-mounted device, sensitivity of a corresponding device is improved. This improves safety of a vehicle in use. When the touch display panel is a display apparatus having a game function, sensitivity of the display apparatus is improved. This improves game experience of a user.

[0025] The auxiliary signal and the touch scanning signal may be the same, for example. That the auxiliary signal is the same as the touch scanning signal may mean that a voltage of the auxiliary signal is the same as a voltage of the touch scanning signal, for example, the voltage of the auxiliary signal and the voltage of the touch scanning signal are both 5V.

[0026] If the voltage of the auxiliary signal is the same as the voltage of the touch scanning signal, the following cases may be prevented: when the auxiliary signal is smaller than the touch scanning signal, a touch scanning signal received by using the touch electrode is reduced by using the auxiliary signal provided by using the auxiliary electrode; or when the auxiliary signal is greater than the touch scanning signal, the auxiliary signal is transmitted to the touch electrode, and the auxiliary signal prevents a touch drive chip from outputting the touch scanning signal to the touch electrode. This affects scanning of the touch electrode. It may be understood that the auxiliary signal being the same as the touch scanning signal includes that the auxiliary signal is the same as the touch scanning signal in a specific error range. To be specific, when the voltage of the auxiliary signal is 10V and the voltage of the touch scanning signal is 10.1V, it is determined that the auxiliary signal is the same as the touch scanning signal.

[0027] In addition, to prevent the auxiliary electrode from blocking light emitted from a subpixel, a material of the auxiliary electrode includes, for example, indium tin oxide (Indium tin oxide, ITO). It should be noted that the material of the auxiliary electrode includes, but is not limited to, ITO, provided that transmission of the light may not be affected and the auxiliary signal may be transmitted within the protection scope of this application.

[0028] An example in which the touch electrode 10 is a mutual-capacitance touch electrode and the touch electrode 10 is a self-capacitance touch electrode is used below for a detailed description separately.

[0029] Refer to FIG. 6. A touch electrode 10 is the mutual-capacitance touch electrode. A touch display panel 100 includes a plurality of auxiliary electrodes 50. The auxiliary electrodes 50 are configured to receive an auxiliary signal sent by a touch drive chip 20. One touch drive electrode 11 is electrically connected to one auxiliary electrode 50. For example, when a plurality of touch drive electrodes 11 include a first touch drive electrode 111, a second touch drive electrode 112, a third touch drive electrode 113, and a fourth touch drive electrode 114, there are, for example, four auxiliary electrodes 50. The four auxiliary electrodes 50 include a first auxiliary electrode 51, a second auxiliary electrode 52, a third auxiliary electrode 53, and a fourth auxiliary electrode 54. The first touch drive electrode 111 is electrically connected to the first auxiliary electrode 51. The second touch drive electrode 112 is electrically connected to the second auxiliary electrode 52. The third touch drive electrode 113 is electrically connected to the third auxiliary electrode 53. The fourth touch drive electrode 114 is electrically connected to the fourth auxiliary electrode 54.

[0030] In a touch frame, scanning of four touch drive electrodes 11 in the touch display panel 100 is to be completed. Specifically, at a first time point, the touch drive chip 20 provides a touch scanning signal to the first touch drive electrode 111 through a touch trace 30, and provides the auxiliary signal to the first touch drive electrode 111 by using the first auxiliary electrode 51. To be specific, a mutual capacitor corresponding to the first touch drive electrode 111 is charged. In addition, the touch drive chip 20 provides a non-touch scanning signal to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114 through the touch trace 30, and the second auxiliary electrode 52, the third auxiliary electrode 53, and the fourth auxiliary electrode 54 do not provide an auxiliary signal to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114. To be specific, mutual capacitors that are respectively corresponding to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114 are discharged. The touch scanning signal may be, for example, a high level, and the non-touch scanning signal may be, for example, a low level. At a second time point, the touch drive chip 20 provides the touch scanning signal to the second touch drive electrode 112, and provides the auxiliary signal to the second touch drive electrode 112 by using the second auxiliary electrode 52. To be specific, a mutual capacitor corresponding to the second touch drive electrode 112 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114 through the touch trace 30, and the first auxiliary electrode 51, the third auxiliary electrode 53, and the fourth auxiliary electrode 54 do not provide the auxiliary signal to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114 are discharged. At a third time point, the touch drive chip 20 provides the touch scanning signal to the third touch drive electrode 113, and provides the auxiliary signal to the third touch drive electrode 113 by using the third auxiliary electrode 53. To be specific, a mutual capacitor corresponding to the third touch drive electrode 113 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114 through the touch trace 30, and the first auxiliary electrode 51, the second auxiliary electrode 52, and the fourth auxiliary electrode 54 do not provide the auxiliary signal to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114 are discharged. At a fourth time point, the touch drive chip 20 provides the touch scanning signal to the fourth touch drive electrode 114, and provides the auxiliary signal to the fourth touch drive electrode 114 by using the fourth auxiliary electrode 54. To be specific, a mutual capacitor corresponding to the third touch drive electrode 113 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113 through the touch trace 30, and the first auxiliary electrode 51, the second auxiliary electrode 52, and the third auxiliary electrode 53 do not provide the auxiliary signal to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113 are discharged. The touch drive chip 20 receives a touch detection signal fed back from a touch detection electrode 12 through the touch trace 30, and determines a touch position based on the touch detection signal. Because the touch drive electrode 11 not only receives the touch scanning signal but also receives the auxiliary signal provided by using the auxiliary electrode 50, charging efficiency is improved. To be specific, although charging time for a capacitor is short, the capacitor may be quickly charged to a target value. This resolves a problem that the capacitor is undercharged when charging time for the capacitor is short.

[0031] To further improve the charging efficiency, refer to FIG. 7. A mutual capacitor formed at an intersection of a touch drive electrode 11 and a touch detection electrode 12 is electrically connected to an auxiliary electrode 50, and a mutual capacitor corresponding to the touch drive electrode 11 is separately charged by using the auxiliary electrode 50. This improves charging efficiency of the mutual capacitor.

[0032] In addition, to reduce a quantity of pins of a touch drive chip 20 that outputs an auxiliary signal, refer to FIG. 8. A plurality of auxiliary electrodes 50 are electrically connected to each other, for example, the plurality of auxiliary electrodes 50 form a grid. The touch display panel 100 also includes a plurality of switch modules 60 and a plurality of control signal lines 70. The switch module 60 includes a control end, a first end, and a second end. One touch drive electrode 11 is corresponding to at least one switch module 60. For example, one touch drive electrode 11 is corresponding to four switch modules 60. First ends of the four switch modules 60 are electrically connected to a same touch drive electrode 11, second ends of the four switch modules 60 are electrically connected to a same auxiliary electrode 50, and control ends of the four switch modules 60 are electrically connected to a same control signal line 70. Therefore, control signals sent by using the touch drive chip 20 are obtained through the control signal line 70, to control the switch modules 60 to be turned on or turned off.

[0033] In a touch frame, scanning of four touch drive electrodes 11 in the touch display panel 100 is to be completed. Specifically, at a first time point, the touch drive chip 20 provides a touch scanning signal to a first touch drive electrode 111 through a touch trace 30, and provides the control signal to a control end of the switch module 60 corresponding to the first touch drive electrode 111 through the control signal line 70, the switch module 60 is turned on, and an auxiliary signal transmitted by using the first auxiliary electrode 51 provides an auxiliary signal to the first touch drive electrode 111 by using the conductive switch module 60. To be specific, a mutual capacitor corresponding to the first touch drive electrode 111 is charged. In addition, the touch drive chip 20 provides a non-touch scanning signal to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114 through the touch trace 30, and provides the control signal to control ends of the switch modules 60 corresponding to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114, to enable the switch module 60 to be turned off. To be specific, mutual capacitors that are respectively corresponding to the second touch drive electrode 112, the third touch drive electrode 113, and the fourth touch drive electrode 114 are discharged. At a second time point, the touch drive chip 20 provides the touch scanning signal to the second touch drive electrode 112 through the touch trace 30, and provides the control signal to the control end of the switch module 60 corresponding to the second touch drive electrode 112 through the control signal line 70, the switch module 60 is turned on, and an auxiliary signal transmitted by using the second auxiliary electrode 52 provides the auxiliary signal to the second touch drive electrode 112 by using the switch module 60. To be specific, a mutual capacitor corresponding to the second touch drive electrode 112 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114 through the touch trace 30, and provides the control signal to control ends of the switch modules 60 corresponding to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114, to enable the switch module 60 to be turned off. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the third touch drive electrode 113, and the fourth touch drive electrode 114 are discharged. At a third time point, the touch drive chip 20 provides the touch scanning signal to the third touch drive electrode 113 through the touch trace 30, and provides the control signal to the control end of the switch module 60 corresponding to the third touch drive electrode 113 through the control signal line 70, the switch module 60 is turned on, and an auxiliary signal transmitted by using the third auxiliary electrode 53 provides the auxiliary signal to the third touch drive electrode 113 by using the switch module 60. To be specific, a mutual capacitor corresponding to the third touch drive electrode 113 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114 through the touch trace 30, and provides the control signal to control ends of the switch modules 60 corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114, to enable the switch module 60 to be turned off. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the fourth touch drive electrode 114 are discharged. At a fourth time point, the touch drive chip 20 provides the touch scanning signal to the fourth touch drive electrode 114 through the touch trace 30, and provides the control signal to the control end of the switch module 60 corresponding to the fourth touch drive electrode 114 through the control signal line 70, the switch module 60 is turned on, and an auxiliary signal transmitted by using the fourth auxiliary electrode 54 provides the auxiliary signal to the fourth touch drive electrode 114 by using the switch module 60. To be specific, a mutual capacitor corresponding to the fourth touch drive electrode 114 is charged. In addition, the touch drive chip 20 provides the non-touch scanning signal to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113 through the touch trace 30, and provides the control signal to control ends of the switch module 60 corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113, to enable the switch module 60 to be turned off. To be specific, mutual capacitors that are respectively corresponding to the first touch drive electrode 111, the second touch drive electrode 112, and the third touch drive electrode 113 are discharged. The touch drive chip 20 receives a touch detection signal fed back from the touch detection electrode 12 through the touch trace 30, and determines a touch position based on the touch detection signal.

[0034] In addition, still refer to FIG. 8. When the touch drive electrode 11 is corresponding to the four switch modules 60, a mutual capacitor formed at an intersection of the touch drive electrode 11 and the touch detection electrode 12 is corresponding to one switch module 60, and the auxiliary electrode 50 may independently charge a mutual capacitor corresponding to the switch module 60 by using the switch module 60, to further improve charging efficiency.

[0035] In addition, still refer to FIG. 8. When there are a plurality of switch modules 60 corresponding to the touch drive electrode 11, control ends of the switch modules 60 corresponding to the same touch drive electrode 11 are electrically connected, that is, electrically connected to the same control signal line 70, without separately providing the control signal line 70 for each switch module 60. In this way, a quantity of pins of the touch drive chip 20 that outputs the control signal may be reduced.

[0036] Refer to FIG. 9. A touch electrode 10 is a self-capacitance touch electrode. A touch display panel 100 includes a plurality of auxiliary electrodes 50. The auxiliary electrodes 50 are configured to receive an auxiliary signal sent by a touch drive chip 20. Touch electrodes 10 in a same touch area TT are electrically connected to a same auxiliary electrode 50. For example, when a plurality of touch areas TT include a first touch area TT1, a second touch area TT2, a third touch area TT3, and a fourth touch area TT4, there are, for example, four auxiliary electrodes 50. The four auxiliary electrodes 50 include a first auxiliary electrode 51, a second auxiliary electrode 52, a third auxiliary electrode 53, and a fourth auxiliary electrode 54. A plurality of touch electrodes 10 in the first touch area TT1 are electrically connected to the first auxiliary electrode 51. A plurality of touch electrodes 10 in the second touch area TT2 are electrically connected to the second auxiliary electrode 52. A plurality of touch electrodes 10 in the third touch area TT3 are electrically connected to the third auxiliary electrode 53. A plurality of touch electrodes 10 in the fourth touch area TT4 are electrically connected to the fourth auxiliary electrode 54.

[0037] In a touch frame, scanning of all touch electrodes 10 in the four touch areas TT in the touch display panel 100 are to be completed. Specifically, at a first time point, the touch drive chip 20 provides a touch scanning signal to the plurality of touch electrodes 10 in the first touch area TT1 through a touch trace 30, and provides an auxiliary signal to the plurality of touch electrodes 10 in the first touch area TT1 by using the first auxiliary electrode 51. At a second time point, the touch drive chip 20 provides the touch scanning signal to the plurality of touch electrodes 10 in the second touch area TT2, and provides the auxiliary signal to the plurality of touch electrodes 10 in the second touch area TT2 by using the second auxiliary electrode 52. At a third time point, the touch drive chip 20 provides the touch scanning signal to the plurality of touch electrodes 10 in the third touch area TT3, and provides the auxiliary signal to the plurality of touch electrodes 10 in the third touch area TT3 by using the third auxiliary electrode 53. At a fourth time point, the touch drive chip 20 provides the touch scanning signal to the plurality of touch electrodes 10 in the fourth touch area TT4, and provides the auxiliary signal to the plurality of touch electrodes 10 in the fourth touch area TT4 by using the fourth auxiliary electrode 54. The touch drive chip 20 receives a touch detection signal fed back from the touch electrode 10 through the touch trace 30, and determines a touch position based on the touch detection signal. Because the touch electrode 10 not only receives the touch scanning signal but also receives an auxiliary signal provided by using the auxiliary electrode 50, charging efficiency is improved. To be specific, although charging time for a capacitor is short, the capacitor may be quickly charged to a target value. This resolve a problem that the capacitor is undercharged when the charging time for the capacitor is short.

[0038] In this case, to reduce a quantity of pins of a touch drive chip 20 that outputs an auxiliary signal, refer to FIG. 10. A plurality of auxiliary electrodes 50 are electrically connected to each other, for example, the plurality of auxiliary electrodes 50 form a grid. A touch display panel 100 also includes a plurality of switch modules 60 and a plurality of control signal lines 70. The switch module 60 includes a control end, a first end, and a second end. All the touch electrodes 10 in one touch area TT are corresponding to one switch module 60, that is, a quantity of switch modules 60 is the same as a quantity of touch areas TT, for example, all are four. The first end of the switch module 60 is electrically connected to touch electrode 10 in a same touch area TT separately, the second end of the switch module 60 is electrically connected to the auxiliary electrodes 50, and the control end of the switch module 60 is electrically connected to the control signal line 70. Therefore, a control signal sent by a touch drive chip 20 is obtained through the control signal line 70, to control the switch module 60 to be turned on or turned off.

[0039] At a first time point, the touch drive chip 20 provides a touch scanning signal to a plurality of touch electrodes 10 in a first touch area TT1 through a touch trace 30, and in addition, the touch drive chip 20 sends the control signal to a control end of a switch module 60 corresponding to the first touch area TT1 through the control signal line 70, the switch module 60 is turned on, and switch modules 60 that are corresponding to other touch areas TT are turned off. In this way, the touch drive chip 20 provides the auxiliary signal to the plurality of touch electrodes 10 in the first touch area TT1 by using the auxiliary electrodes 50 and the conducive switch modules 60. At a second time point, the touch drive chip 20 provides the touch scanning signal to plurality of touch electrodes 10 in a second touch area TT2 through the touch trace 30, and in addition, the touch drive chip 20 sends the control signal to a control end of a switch module 60 corresponding to the second touch area TT2 through the control signal line 70, the switch module 60 is turned on, and the switch modules 60 that are corresponding to other touch areas TT are turned off. In this way, the touch drive chip 20 provides the auxiliary signal to the plurality of touch electrodes 10 in the second touch area TT2 by using the auxiliary electrodes 50 and the conducive switch modules 60. At a third time point, the touch drive chip 20 provides the touch scanning signal to plurality of touch electrodes 10 in a third touch area TT3 through the touch trace 30, and in addition, the touch drive chip 20 sends the control signal to a control end of a switch module 60 corresponding to the third touch area TT3 through the control signal line 70, the switch module 60 is turned on, and the switch modules 60 that are corresponding to other touch areas TT are turned off. In this way, the touch drive chip 20 provides the auxiliary signal to the plurality of touch electrodes 10 in the third touch area TT3 by using the auxiliary electrodes 50 and the conducive switch modules 60. At a fourth time point, the touch drive chip 20 provides the touch scanning signal to plurality of touch electrodes 10 in a fourth touch area TT4 through the touch trace 30, and in addition, the touch drive chip 20 sends the control signal to a control end of a switch module 60 corresponding to the fourth touch area TT4 through the control signal line 70, the switch module 60 is turned on, and the switch modules 60 that are corresponding to other touch areas TT are turned off. In this way, the touch drive chip 20 provides the auxiliary signal to the plurality of touch electrodes 10 in the fourth touch area TT4 by using the auxiliary electrodes 50 and the conducive switch modules 60. The touch drive chip 20 receives a touch detection signal fed back from the touch electrode 10 through the touch trace 30, and determines a touch position based on the touch detection signal.

[0040] It should be noted that, in FIG. 10, an example in which a plurality of touch electrodes 10 in the touch area TT are corresponding to the switch modules 60 is used for descriptions, and does not constitute any limitation on this application. In other implementations of this application, the plurality of touch electrodes 10 in one touch area TT are corresponding to the plurality of switch modules 60. For example, refer to FIG. 11. A plurality of switch modules 60 are electrically connected to a plurality of touch electrodes 10 in a one-to-one correspondence, that is, one touch electrode 10 is corresponding to one switch module 60. To be specific, a quantity of switch modules 60 is the same as a quantity of touch electrodes 10. A first end of the switch module 60 is electrically connected to the touch electrode 10, a second end of the switch module 60 is electrically connected to the auxiliary electrode 50, and a control end of the switch module 60 is electrically connected to a control signal line 70. A control signal sent by a touch drive chip 20 is obtained through the control signal line 70. Optionally, control ends of the switch modules 60 that are corresponding to the touch electrodes 10 in a same touch area TT are electrically connected, that is, electrically connected to a same control signal line 70, without separately providing the control signal line 70 for each switch module 60. In this way, a quantity of pins of the touch drive chip 20 may be reduced.

[0041] In two cases in which the touch electrode 10 is a self-capacitance touch electrode and the touch electrode 10 is a mutual-capacitance touch electrode, for the switch module 60, a type of the switch module 60 is not limited in embodiments of this application, provided that switch functions are within the scope of protection of this application. For example, refer to FIG. 8 and FIG. 11. The foregoing switch module 60 may, for example, include a transistor. To distinguish the transistor in subsequent embodiments, a transistor of the switch module 60 is, for example, a first transistor 61.

[0042] It can be learned from the foregoing description that a touch display panel 100 provided by embodiments of this application may be an LCD panel, or may be an OLED display panel.

[0043] In an example, the touch display panel 100 is an LCD panel. When the touch display panel 100 is an LCD display panel, refer to FIG. 12. FIG. 12 is a schematic diagram of a structure of a film layer of an LCD panel. The LCD panel includes an array substrate 110, a color film substrate 120, and a liquid crystal layer 130 disposed between the array substrate 110 and the color film substrate 120. The color film substrate 120 includes a color filter layer and a black matrix (not shown in the figure) configured to cover a drive circuit on the array substrate. The color filter layer may include a red-colored ring resistor, a green-colored ring resistor, and a blue-colored ring resistor, and is not limited in embodiments of this application. The array substrate 110 includes a substrate 116 and a pixel driving circuit 111 disposed on the substrate 116. The pixel driving circuit 111 includes a plurality of transistors. To distinguish the transistors in the foregoing description, the transistor in the pixel driving circuit 111 is, for example, a second transistor 112. The array substrate 110 includes a first metal layer M1, a second metal layer M2, a third metal layer M3, and an insulation layer disposed between metal layers. The first metal layer M1 includes a gate 113 of the second transistor 112 and a scan line (not shown in the figure). The first metal layer M1 further includes a gate 62 of a first transistor 61 and a control signal line (not shown in the figure). The second metal layer M2 includes a first electrode 114, a second electrode 115, and a data line of the second transistor 112 (not shown in the figure). The second metal layer M2 further includes a first electrode 63 and a second electrode 64 of the first transistor 61. The third metal layer M3 includes a touch trace 30. The array substrate 110 further includes a common electrode 140 and a pixel electrode 150. The common electrode 140 is electrically connected to the touch trace 30. The common electrode 140 is multiplexed as a touch electrode 10. An auxiliary electrode 50 and the common electrode 140 are disposed on a same layer.

[0044] Because the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are formed with a same material in a same process, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are formed with a same material in a same process, and the auxiliary electrode 50 and the common electrode 140 are formed with a same material in a same process, processes are reduced. In addition, in comparison that the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are separately disposed at different film layers, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are separately disposed at different film layers, and the auxiliary electrode 50 and the common electrode 140 are separately disposed at different film layers, in this embodiment of this application, the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are disposed at a same layer, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are disposed at a same film layer, and the auxiliary electrode 50 and the common electrode 140 are disposed at a same layer. Therefore, an overall thickness of a touch display panel 100 is reduced, and the touch display panel 100 is lighter and thinner.

[0045] It should be noted that the first electrode 63 of the first transistor 61 in this embodiment is one of a source and a drain of the first transistor 61, and the second electrode 64 of the first transistor 61 is the other of the source and the drain of the first transistor 61. The first electrode 114 of the second transistor 112 is one of a source and a drain of the second transistor 112, and the second electrode 115 of the second transistor 112 is the other of the source and the drain of the second transistor 112. Transistors in the following embodiments are the same as this. Details are not described in the following embodiments.

[0046] It should be further noted that the structure of the film layer of the LCD panel is described by using an example in which the touch electrode 10 is a self-capacitance touch electrode, and does not constitute any limitation on this application. A person skilled in the art may dispose positions of the first transistor 61 and the auxiliary electrode 50 based on the structure of the film layer of the touch display panel 100. It should be further noted that the foregoing only illustrates a relationship between film layers of the LCD panel, and does not constitute any limitation on this application. A person skilled in the art may dispose a position of a film layer of each structure based on an actual situation. In other optional implementations, the first transistor 61, the auxiliary electrode 50, and a control signal line 70 may further be disposed separately, that is, do not share a film layer with an original film layer of the LCD panel. When the first transistor 61, the auxiliary electrode 50, and the control signal line 70 are separately disposed, the auxiliary electrode 50 and the control signal line 70 may be disposed in a same layer.

[0047] In another example, a touch display panel 100 is an OLED display panel. When the touch display panel 100 is an OLED display panel, refer to FIG. 13. FIG. 13 is a schematic diagram of a structure of a film layer of an OLED display panel. The OLED display panel includes a substrate 116, a pixel circuit layer 117 disposed on the substrate 116, and a light emitting layer 160 disposed on a side, away from the substrate 116, of the pixel circuit layer 117. The light emitting layer 160 includes an anode 161, a light emitting functional layer 162, and a transparent cathode 163. The OLED display panel may further include a packaging layer (not shown in the figure) configured to perform water-oxygen protection for the light emitting functional layer 162. The pixel circuit layer 117 includes a plurality of pixel driving circuits 111. The pixel driving circuit 111 includes a plurality of transistors. To distinguish the transistors in the foregoing description, the transistor in the pixel driving circuit 111 is, for example, a second transistor 112. An array substrate 110 includes a first metal layer M1, a second metal layer M2, a third metal layer M3, and an insulation layer disposed between metal layers. The first metal layer M1 includes a gate 113 of the second transistor 112 and a scan line (not shown in the figure). The first metal layer M1 further includes a gate 62 of a first transistor 61 and a control signal line (not shown in the figure). The second metal layer M2 includes a first electrode 114, a second electrode 115, and a data line of the second transistor 112 (not shown in the figure). The second metal layer M2 further includes a first electrode 63 and a second electrode 64 of the first transistor 61. The third metal layer M3 includes a touch trace 30. The OLED display panel further includes a touch electrode 10. The touch electrode 10 is electrically connected to the touch trace 30. An auxiliary electrode 50 and the transparent cathode 163 are disposed in a same layer.

[0048] Because the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are formed with a same material in a same process, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are formed with a same material in a same process, and the auxiliary electrode 50 and the transparent cathode 163 are formed with a same material in a same process, processes are reduced. In addition, in comparison that the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are separately disposed at different film layers, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are separately disposed at different film layers, and the auxiliary electrode 50 and the transparent cathode 163 are separately disposed at different film layers, in this embodiment of this application, the gate 62 of the first transistor 61, the control signal line, and the gate 113 of the second transistor 112 are disposed at a same layer, the first electrode 63 and the second electrode 64 of the first transistor 61, and the first electrode 114 and the second electrode 115 of the second transistor 112 are disposed at a same film layer, and the auxiliary electrode 50 and the transparent cathode 163 are disposed at a same layer. Therefore, an overall thickness of the touch display panel 100 is reduced, and the touch display panel 100 is lighter and thinner.

[0049] It should be noted that the structure of the film layer of the OLED display panel is described by using an example in which the touch electrode 10 is a self-capacitance touch electrode, and does not constitute any limitation on this application. A person skilled in the art may dispose positions of the first transistor 61 and the auxiliary electrode 50 based on the structure of the film layer of the touch display panel 100.

[0050] It should be further noted that the foregoing only illustrates a relationship between film layers of the OLED display panel, and does not constitute any limitation on this application. A person skilled in the art may dispose a position of a film layer of each structure based on an actual situation. In other optional implementations, the first transistor 61, the auxiliary electrode 50, and the control signal line 70 may further be disposed separately, that is, do not share a film layer with an original film layer of the OLED display panel. When the first transistor 61, the auxiliary electrode 50, and the control signal line 70 are separately disposed, the auxiliary electrode 50 and the control signal line 70 may be disposed in a same layer.

Claims

1. A touch display panel (100), comprising: a plurality of touch electrodes (10), wherein the touch electrode is configured to receive a touch scanning signal; and at least one auxiliary electrode (50), electrically connected to the touch electrode and configured to provide an auxiliary signal to the touch electrode when the touch electrode receives the touch scanning signal, wherein the auxiliary signal is the same as the touch scanning signal wherein: the touch electrode comprises a self-capacitance touch electrode; the touch display panel (100) comprises N touch areas; each touch area comprises a plurality of self-capacitance touch electrodes (10); there are N auxiliary electrodes; self-capacitance touch electrodes (10) in a same touch area are electrically connected to a same auxiliary electrode (50), wherein N is a positive integer greater than or equal to 1; N auxiliary electrodes are electrically connected; the touch display panel (100) further comprises a plurality of switch modules and a plurality of control signal lines; and the switch module (60) comprises a first end, a second end, and a control end; the self-capacitance touch electrodes (10) in the same touch area are electrically connected to a first end of at least one switch module (60); second ends of the plurality of switch modules are all electrically connected to the auxiliary electrodes; a control end of the switch module (60) is electrically connected to the control signal line (70); the control signal line (70) is used to send a control signal to the control end of the switch module (60), to control the switch module (60) to be turned on or turned off; and when self-capacitance touch electrodes (10) in an ith touch area receive the touch scanning signal, a switch module (60) electrically connected to the self-capacitance touch electrode in the ith touch area is configured to transmit an auxiliary signal transmitted on the auxiliary electrode (50) to the self-capacitance touch electrode in the ith touch area, wherein i is a positive integer greater than or equal to 1, and i is less than or equal to N, or wherein: the touch electrode comprises a mutual-capacitance touch electrode; the mutual-capacitance touch electrode comprises L touch drive electrodes and a plurality of touch detection electrodes; L touch drive electrodes extend in a first direction and are arranged in a second direction; and the plurality of touch detection electrodes extend in the second direction and are arranged in the first direction, wherein the first direction intersects the second direction; there are L auxiliary electrodes, wherein L is a positive integer greater than or equal to 1; a plurality of auxiliary electrodes are electrically connected to a plurality of touch drive electrodes in a one-to-one correspondence; the auxiliary electrode (50) is configured to provide the auxiliary signal to the touch drive electrode when the touch drive electrode receives the touch scanning signal, wherein L auxiliary electrodes are electrically connected; the touch display panel (100) further comprises a plurality of switch modules and a plurality of control signal lines; and the switch module (60) comprises a first end, a second end, and a control end; one touch drive electrode is electrically connected to a first end of at least one switch module (60); second ends of the plurality of switch modules are all electrically connected to the auxiliary electrodes; a control end of the switch module (60) is electrically connected to the control signal line (70); and the control signal line (70) is used to send a control signal to the control end of the switch module (60), to control the switch module (60) to be turned on or turned off; and when a jth touch drive electrode receives the touch scanning signal, a switch module (60) electrically connected to the jth touch drive electrode is configured to transmit an auxiliary signal transmitted on the auxiliary electrode (50) to the jth touch drive electrode, wherein j is a positive integer greater than or equal to 1, and j is less than or equal to L, the touch display panel being characterized in that the control signal line (70) and the auxiliary electrode (50) are disposed at a same layer.

2. A touch display apparatus, comprising the touch display panel (100) according to claim 1.

3. A drive method for a touch display panel (100), wherein the drive method for a touch display panel (100) is applied to the touch display panel (100) according to claim 1 and comprises: sending a touch scanning signal to a to-be-scanned touch electrode, and sending an auxiliary signal to an auxiliary electrode (50), to send the auxiliary signal to the to-be-scanned touch electrode by using the auxiliary electrode (50), wherein the to-be-scanned touch electrode is a touch electrode receiving the touch scanning signal.