TWI765331B - Touch display module, electronic apparatus, and touch position detection method - Google Patents

Abstract

A touch display module includes a display panel and a touch sensing layer. The touch sensing layer is embedded in the display panel and includes a plurality of sensing electrode groups. The sensing electrode groups are sequentially arranged along a first axial direction. One of the sensing electrode groups includes a first electrode block, a second electrode block, and a third electrode block spaced apart from each other. The first electrode block is located at an identical side of the second electrode block and the third electrode block in the first axial direction, and is located between the second electrode block and the third electrode block in a second axial direction perpendicular to the first axial direction.

Description

Touch display module, electronic device and touch position detection method

The present invention relates to a touch display module, an electronic device and a touch position detection method.

The in-cell touch technology can make the touch module inside the display, so that the device as a whole has the advantages of thinness and high brightness. The operating principle of the common in-cell touch display on the market is to perform self-capacitive touch sensing through a plurality of rectangular touch electrodes arranged in an internal matrix, and each touch electrode needs a separate trace to The sensing result is transmitted to the touch chip.

However, as the demand for touch resolution gradually increases, the number of channels of a common touch chip is insufficient to support this design method, and the touch electrodes are easily short-circuited with each other due to a large number of dense wirings.

Therefore, how to propose a touch display module that can solve the above problems is one of the problems that the industry urgently wants to invest in research and development resources to solve.

In view of this, one objective of the present invention is to provide a touch display module that can solve the above problems.

In order to achieve the above object, according to an embodiment of the present invention, a touch display module includes a display panel and a touch sensing layer. The touch sensing layer is embedded in the display panel and includes a plurality of sensing electrode groups. The sensing electrode groups are arranged in sequence along the first axis. One of the sensing electrode sets includes a first electrode block, a second electrode block and a third electrode block which are separated from each other. The first electrode block is located on the same side of the second electrode block and the third electrode block on the first axis, and is located on the second electrode block and the third electrode block on the second axis perpendicular to the first axis between blocks.

In one or more embodiments of the present invention, the display panel has a viewing area. The second electrode block and the third electrode block respectively extend toward each other from two opposite edges of the visible area.

In one or more embodiments of the present invention, a first gap is formed between the first electrode block and the second electrode block. A second gap is formed between the first electrode block and the third electrode block. The extending directions of the first gap and the second gap are inclined with respect to the first axial direction and the second axial direction.

In one or more embodiments of the present invention, one end of the first gap communicates with one end of the second gap.

In one or more embodiments of the present invention, the contour of at least one of the first gap and the second gap is serrated.

In one or more embodiments of the present invention, the display panel has a viewing area. The sensing electrode group further includes two conductive extension parts. The two conductive extension parts are connected to one of the first electrode block, the second electrode block and the third electrode block, and extend outside the visible area.

In one or more embodiments of the present invention, the sensing electrode group further includes a fourth electrode block. The fourth electrode block is located between the second electrode block and the third electrode block in the second axis. The second electrode block and the third electrode block are located between the first electrode block and the fourth electrode block in the first axis direction.

In one or more embodiments of the present invention, the first electrode block, the second electrode block, the third electrode block and the fourth electrode block are arranged in a ring shape.

In one or more embodiments of the present invention, the outer contour of at least one of the first electrode block, the second electrode block and the third electrode block is substantially triangular.

In one or more embodiments of the present invention, the orthographic projections of all sub-pixels of the display panel on the touch sensing layer are located within the range of the sensing electrode group.

In one or more embodiments of the present invention, the display panel is a liquid crystal display panel or an organic light emitting diode display panel.

In order to achieve the above objective, according to an embodiment of the present invention, an electronic device includes the aforementioned touch display module and a cover plate. The cover plate is arranged on the touch display module.

In order to achieve the above objective, according to an embodiment of the present invention, a touch position detection method is applied to an electronic device including a plurality of sensing electrode groups. The sensing electrode groups are arranged in sequence along the first axis, and each includes a first electrode block, a second electrode block and a third electrode block which are separated from each other. The first electrode block is located on the same side of the second electrode block and the third electrode block in the first axis, and is located between the second electrode block and the third electrode block in the second axis. The touch position detection method includes: obtaining the first axis coordinate of the touch point on the first axis according to the sensing electrode group with capacitance change; and according to the first electrode block, the second electrode block and the first electrode block of the sensing electrode group The capacitance change of at least two of the three electrode blocks calculates the second axis coordinate of the touch point on the second axis.

In one or more embodiments of the present invention, the step of calculating the second axis coordinate includes: judging whether the second electrode block and the third electrode block have capacitance changes at the same time; When the electrode block has capacitance changes at the same time, the second axis coordinate is calculated according to the capacitance changes of the first electrode block, the second electrode block and the third electrode block; and if the second electrode block and the third electrode block If there is no capacitance change at the same time, the second axis coordinate is calculated according to the capacitance change of the first electrode block and the second electrode block or the capacitance change of the first electrode block and the third electrode block.

To sum up, in the touch display module of the present invention, the touch sensing layer embedded in the display panel includes a plurality of sensing electrode sets arranged in sequence along the first axis, and the sensing electrode set includes phase The first electrode block, the second electrode block and the third electrode block are separated and staggered along the second axis. Therefore, compared with the conventional in-cell touch display having a plurality of rectangular touch electrodes arranged in a matrix, the electronic device of the present invention can greatly reduce the number of traces from the touch sensing layer to the control circuit, which is beneficial to The design of the touch chip is simplified, and the risk of short circuit between the electrode blocks of the touch sensing layer is reduced to improve product reliability. In addition, since the number of traces used is small, the touch sensing layer does not need to be coupled to the traces through via holes, thereby helping to simplify the manufacturing process and improve the production yield.

The above descriptions are only used to describe the problems to be solved by the present invention, the technical means for solving the problems, and their effects, etc. The specific details of the present invention will be described in detail in the following embodiments and related drawings.

Several embodiments of the present invention will be disclosed in the drawings below, and for the sake of clarity, many practical details will be described together in the following description. It should be understood, however, that these practical details should not be used to limit the invention. That is, in some embodiments of the invention, these practical details are unnecessary. In addition, for the purpose of simplifying the drawings, some well-known structures and elements will be shown in a simple and schematic manner in the drawings.

Please refer to FIG. 1 , which is a schematic cross-sectional view of an electronic device 100 according to an embodiment of the present invention. As shown in FIG. 1 , in this embodiment, the electronic device 100 includes a touch display module and a cover plate 130 . The cover plate 130 is disposed on the touch display module. The material of the cover plate 130 includes, for example, glass. The touch display module includes a display panel 110 and a touch sensing layer 120 . The touch sensing layer 120 is embedded in the display panel 110 . The display panel 110 sequentially includes a first polarizing layer 111 , a lower substrate 112 , an insulating layer 113 , a thin film transistor layer 114 , a liquid crystal layer 115 , a plurality of color filters 116 , an upper substrate 117 and a second polarizing layer 118 from bottom to top . Specifically, the touch sensing layer 120 is embedded between the lower substrate 112 and the insulating layer 113 . In other words, the display panel 110 of this embodiment is a liquid crystal display panel, but the present invention is not limited to this.

Please refer to FIG. 2 , which is a schematic cross-sectional view of an electronic device 200 according to another embodiment of the present invention. As shown in FIG. 2 , in this embodiment, the touch display module of the electronic device 200 includes a display panel 210 and a touch sensing layer 120 . The touch sensing layer 120 is embedded in the display panel 210 . The display panel 210 includes a lower substrate 211 , a metal conductive layer 212 , a plurality of organic light-emitting layers 214r, 214g, 214b embedded in the insulating layer 213, and an upper substrate 215 in sequence from bottom to top. Specifically, the touch sensing layer 120 is embedded between the organic light emitting layers 214r, 214g, and 214b and the upper substrate 215 . In other words, the display panel 210 of this embodiment is an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel. In another embodiment, the positions of the metal conductive layer 212 and the touch sensing layer 120 can be interchanged.

In some embodiments, the electronic devices 100 and 200 may be smart phones, tablet computers or notebook computers, but the invention is not limited thereto.

Please refer to FIG. 3 , which is a front view of the touch sensing layer 120 in FIG. 1 in one embodiment. As shown in FIG. 3 , in this embodiment, the touch sensing layer 120 includes a plurality of sensing electrode groups 121 . The sensing electrode groups 121 are arranged in sequence along the first axis A1. Each sensing electrode group 121 includes a first electrode block 121a, a second electrode block 121b and a third electrode block 121c which are separated from each other. The first electrode block 121a is located on the same side of the second electrode block 121b and the third electrode block 121c on the first axis A1, and is located on the second axis A2 perpendicular to the first axis A1. between the electrode block 121b and the third electrode block 121c.

Specifically, as shown in FIG. 3 , the display panel 110 has a viewable area AA. The second electrode block 121b and the third electrode block 121c respectively extend from two opposite edges (eg, the upper edge and the lower edge) of the visible area AA toward each other. In other words, each sensing electrode group 121 extends to the upper and lower edges of the visible area AA along the second axis A2.

A first gap G1 is formed between the first electrode block 121a and the second electrode block 121b. A second gap G2 is formed between the first electrode block 121a and the third electrode block 121c. The extending directions of the first gap G1 and the second gap G2 are inclined with respect to the first axial direction A1 and the second axial direction A2. In this way, the widths of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c on the first axis A1 can be changed along the second axis A2. In some embodiments, as shown in FIG. 3 , the width of the first electrode block 121 a along the first axis A1 first increases and then decreases along the second axis from top to bottom. The width of the second electrode block 121b on the first axis A1 gradually decreases from top to bottom along the second axis. The width of the third electrode block 121c on the first axis A1 gradually increases from top to bottom along the second axis.

In some embodiments, as shown in FIG. 3 , the first gap G1 and the second gap G2 extend straight, and one end of the first gap G1 is communicated with one end of the second gap G2, so that the first electrode block is Outer contours of the 121a, the second electrode block 121b and the third electrode block 121c are substantially triangular. For example, as shown in FIG. 3, the outer contour of the first electrode block 121a is an isosceles triangle, while the outer contours of the second electrode block 121b and the third electrode block 121c are right triangles, and the other From an angle, the first electrode block 121a, the second electrode block 121b and the third electrode block 121c can be pieced together into a rectangle.

The outlines of the outer edges of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c are not limited to the above-mentioned embodiment. In practical applications, only one or both of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c may have substantially triangular outer contours. For example, in some embodiments, the outer contours of the second electrode block 121b and the third electrode block 121c are right triangles, and the outer contours of the first electrode block 121a are parallelograms (for example, by The third electrode block 121c in Fig. 3 is mirrored on the first axis A1). In other embodiments, the outer contour of the first electrode block 121a is a triangle, and the outer contour of at least one of the second electrode block 121b and the third electrode block 121c is a trapezoid. (For example, by reducing the length of the first electrode block 121a along the first axis A1).

Please refer to FIG. 4 , which is an enlarged view illustrating a partial region R of FIG. 3 . As shown in FIG. 4 , in this embodiment, the display panel 110 includes a plurality of sub-pixels SP arranged in the visible area AA. The three sub-pixels SP shown in FIG. 3 can be used to emit red light, green light and blue light, for example, but the color arrangement and combination of the sub-pixels SP of the present invention are not limited thereto. It should be noted that the orthographic projections of all the sub-pixels SP of the display panel 110 on the touch sensing layer 120 are located within the range of the sensing electrode group 121 . In other words, the touch sensing layer 120 covers the area of all the sub-pixels SP. In order to achieve the aforementioned purpose, at least one of the first gap G1 between the first electrode block 121a and the second electrode block 121b and the second gap G2 between the first electrode block 121a and the third electrode block 121c The outline of the person is jagged.

Please refer to FIG. 5 , which is a functional block diagram of the electronic devices 100 and 200 in one embodiment. As shown in FIG. 5 , in this embodiment, the electronic devices 100 and 200 have a self-capacitive touch function, and further include a control circuit 150 and a plurality of wirings 140 . The sensing electrode group 121 further includes a plurality of conductive extending portions 122 . Each conductive extension 122 is connected to one of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c, and extends outside the visible area AA. Each conductive extension 122 is then connected to the control circuit 150 via the corresponding trace 140 .

The respective capacitance values of the sensing electrode groups 121 are changed according to the touch input, wherein the touch input may be the user approaching or approaching the electronic devices 100 and 200 with a finger. The capacitance value change of the sensing electrode group 121 is transmitted to the control circuit 150 through the trace 140, and the control circuit 150 is used to calculate the touch input on the first axis A1 and the second axis A2 according to the received capacitance value change on the location.

In some embodiments, the first electrode block 121a, the second electrode block 121b, the third electrode block 121c and the conductive extension portion 122 of the sensing electrode group 121 are all made of the same material. As shown in FIG. 5 , the conductive extension portions 122 are located on one side of the sensing electrode group 121 close to the edge of the visible area AA, so as to extend to the outside of the visible area AA nearby. In some embodiments, the first electrode block 121 a , the second electrode block 121 b and the third electrode block 121 c are each connected to two conductive extensions 122 , so as to prevent the conductive extensions 122 in the manufacturing process of the touch sensing layer 120 There is a problem that the disconnection occurs and the capacitance signals of the first electrode block 121 a , the second electrode block 121 b and the third electrode block 121 c cannot be transmitted to the control circuit 150 through the wiring 140 . In other words, the aforementioned approach can increase reliability and reduce impedance. In some embodiments, the first electrode block 121a, the second electrode block 121b and the third electrode block 121c can also be connected to two or more conductive extension portions 122, respectively.

Please refer to FIG. 6 , which is a front view illustrating a touch sensing layer 120A according to another embodiment of the present invention. As shown in FIG. 6 , in this embodiment, the touch sensing layer 120A also includes a plurality of sensing electrode groups 121 arranged in sequence along the first axis A1 . Compared with the touch-sensing layer 120 shown in FIG. 3 , the touch-sensing layer 120A of this embodiment modifies the first electrode block 121 a , the second electrode block 121 b and the first electrode block 121 b in some sensing electrode groups 121 . The arrangement of the three electrode blocks 121c. Specifically, the first electrode block 121a, the second electrode block 121b and the third electrode block 121c of each sensing electrode group 121 in FIG. 3 are arranged in the same manner. In FIG. 6, the arrangement of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c of any two adjacent sensing electrode groups 121 is symmetrical along the first axis A1.

Please refer to Figure 7 and Figure 8. FIG. 7 is a front view illustrating a touch sensing layer 320 according to another embodiment of the present invention. FIG. 8 is a functional block diagram illustrating the electronic devices 100 and 200 in another embodiment. As shown in FIGS. 7 and 8, in this embodiment, the touch sensing layer 320 also includes a plurality of sensing electrode groups 321 arranged in sequence along the first axis A1. Compared with the touch sensing layer 120 shown in FIG. 3 , the present embodiment increases the number of electrode blocks included in each sensing electrode group 121 . Specifically, in this embodiment, each sensing electrode group 321 includes a first electrode block 321a, a second electrode block 321b, a third electrode block 321c, and a fourth electrode block 321d. The fourth electrode block 321d is located between the second electrode block 321b and the third electrode block 321c in the second axial direction A2. The second electrode block 321b and the third electrode block 321c are located between the first electrode block 321a and the fourth electrode block 321d in the first axial direction A1. Further, the first electrode block 321a, the second electrode block 321b, the third electrode block 321c and the fourth electrode block 321d are arranged in a ring shape. Each of the first electrode block 321a, the second electrode block 321b, the third electrode block 321c, and the fourth electrode block 321d can be connected to one or more conductive extensions 122 spanning outside the visible area AA, and is connected to the control circuit 150 via the trace 140 .

Please refer to FIG. 9 , which is a flowchart illustrating a touch position detection method according to an embodiment of the present invention. As shown in FIG. 9 , in this embodiment, the touch position detection method mainly includes steps S101 to S104 , and can be applied to electronic devices 100 and 200 including a plurality of sensing electrode groups 121 . As mentioned above, the sensing electrode groups 121 are arranged in sequence along the first axis A1, and each includes a first electrode block 121a, a second electrode block 121b and a third electrode block 121c which are separated from each other. The first electrode block 121a is located on the same side of the second electrode block 121b and the third electrode block 121c on the first axis A1, and is located on the second electrode block 121b and the third electrode on the second axis A2 between blocks 121c. For example, the touch position detection method may be performed by the control circuit 150 .

In step S101 , the first axis coordinate system of the touch point on the first axis A1 is obtained according to the sensing electrode group 121 having a change in capacitance.

Please refer to FIG. 3 , when the touch point is located in a certain sensing electrode group 121 , only this sensing electrode group 121 will have capacitance change, and other sensing electrode groups 121 will not have capacitance change. Since the sensing electrode sets 121 are arranged in sequence along the first axis A1, the control circuit 150 can know the first axis coordinates represented by the sensing electrode set 121 according to the sensing electrode set 121 with capacitance variation.

After the first axis coordinate of the touch point on the first axis A1 is determined, steps S102 to S104 may be performed to calculate the second axis coordinate of the touch point on the second axis A2.

In step S102, it is determined whether the second electrode block 121b and the third electrode block 121c have capacitance changes at the same time. If the second electrode block 121b and the third electrode block 121c have capacitance changes at the same time (that is, the determination result of step S102 is yes), step S104 is further executed according to the touch position detection method; if the second electrode block 121b If there is no capacitance change with the third electrode block 121c at the same time (ie, the determination result of step S102 is NO), step S103 is further executed according to the touch position detection method.

10 to 12 may be referred to below. FIG. 10 is a schematic diagram illustrating the capacitance changes of different parts of the sensing electrode group 121 due to touch. FIG. 11 is another schematic diagram of the capacitance changes of different parts of the sensing electrode group 121 due to touch. FIG. 12 is another schematic diagram of the capacitance changes of different parts of the sensing electrode group 121 due to touch.

In step S103, the second axis coordinate system of the touch point on the second axis A2 is based on the capacitance change of the first electrode block 121a and the second electrode block 121b or the first electrode block 121a and the third electrode region Calculated by changing the capacitance of the block 121c.

If the control circuit 150 detects that the second electrode block 121b and the third electrode block 121c do not have capacitance changes at the same time, it can be further estimated that the touch point falls on the upper half area of the sensing electrode group 121 (ie, the second electrode The area where the block 121b is located) or the lower half area (ie, the area where the third electrode block 121c is located). For example, as shown in FIG. 10 , if it is detected that the second electrode block 121 b has a capacitance change and the third electrode block 121 c does not have a capacitance change, the control circuit 150 can lock the analysis area on the sensing electrode group 121 . the upper half area, and then accurately calculate the second axis coordinate of the touch point on the second axis A2 according to the capacitance change of the first electrode block 121a and the second electrode block 121b. As shown in FIG. 11 , if it is detected that the third electrode block 121c has a capacitance change and the second electrode block 121b does not have a capacitance change, the control circuit 150 can lock the analysis area in the lower half area of the sensing electrode group 121 , Then, the second axis coordinate of the touch point on the second axis A2 is accurately calculated according to the capacitance change of the first electrode block 121a and the third electrode block 121c.

In step S104, the second axis coordinate system of the touch point on the second axis A2 is calculated according to the capacitance changes of the first electrode block 121a, the second electrode block 121b and the third electrode block 121c.

If the control circuit 150 detects that the second electrode block 121b and the third electrode block 121c have capacitance changes at the same time, it can be determined that the touch point is located in the central area of the sensing electrode group 121 (ie, the first electrode block 121a ). , the boundary area of the second electrode block 121b and the third electrode block 121c). In this way, the control circuit 150 can lock the analysis area in the central area of the sensing electrode group 121, and then accurately calculate the capacitance changes according to the first electrode block 121a, the second electrode block 121b and the third electrode block 121c. The second axis coordinate of the touch point on the second axis A2.

It can be seen from the above embodiments that the sensing electrode group 121 including the first electrode block 121 a , the second electrode block 121 b and the third electrode block 121 c allows the control circuit 150 to first know that the touch point is located on the sensing electrode group 121 . The upper half area and the lower half area or the central area reduce the calculation area of the control circuit 150 by approximately half. Therefore, the electronic devices 100 and 200 can achieve more than twice the accuracy of the conventional touch device with the analog-to-digital converter (ADC) of the same resolution.

From the above detailed description of the specific embodiments of the present invention, it can be clearly seen that in the touch display module of the present invention, the touch sensing layer embedded in the display panel includes a plurality of layers along the first axis. The induction electrode groups are arranged in sequence, and the induction electrode group includes a first electrode block, a second electrode block and a third electrode block which are separated and staggered in the second axial direction. Therefore, compared with the conventional in-cell touch display having a plurality of rectangular touch electrodes arranged in a matrix, the electronic device of the present invention can greatly reduce the number of traces from the touch sensing layer to the control circuit, which is beneficial to The design of the touch chip is simplified, and the risk of short circuit between the electrode blocks of the touch sensing layer is reduced to improve product reliability. In addition, since the number of traces used is small, the touch sensing layer does not need to be coupled to the traces through via holes, thereby helping to simplify the manufacturing process and improve the production yield.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be determined by the scope of the appended patent application.

100,200: Electronic devices 110, 210: Display panel 111: The first polarizing layer 112,211: Lower substrate 113,213: Insulation layer 114: thin film transistor layer 115: liquid crystal layer 116: Color filter 117,215: Upper substrate 118: Second polarizing layer 120, 120A, 320: touch sensing layer 121,321: Sensing electrode set 121a, 321a: first electrode block 121b, 321b: the second electrode block 121c, 321c: The third electrode block 122: Conductive extension 130: Cover 140: line 150: Control circuit 212: Metal conductive layer 214r, 214g, 214b: organic light-emitting layer 321d: Fourth electrode block AA: visible area A1: The first axis A2: The second axis G1: first gap G2: Second Gap R: local area SP: Subpixel S101~S104: Steps

In order to make the above and other objects, features, advantages and embodiments of the present invention more clearly understood, the accompanying drawings are described as follows: FIG. 1 is a schematic cross-sectional view of an electronic device according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view of an electronic device according to another embodiment of the present invention. FIG. 3 is a front view illustrating the touch sensing layer in FIG. 1 in one embodiment. FIG. 4 is an enlarged view showing a partial area of FIG. 3 . FIG. 5 is a functional block diagram illustrating an electronic device in one embodiment. FIG. 6 is a front view illustrating a touch sensing layer according to another embodiment of the present invention. FIG. 7 is a front view illustrating a touch sensing layer according to another embodiment of the present invention. FIG. 8 is a functional block diagram of an electronic device in another embodiment. FIG. 9 is a flowchart illustrating a touch position detection method according to an embodiment of the present invention. FIG. 10 is a schematic diagram illustrating the capacitance change of different parts of the sensing electrode group due to touch. FIG. 11 is another schematic diagram of capacitance changes in different parts of the sensing electrode set due to touch. FIG. 12 is another schematic diagram of the capacitance changes in different parts of the sensing electrode set due to touch.

Domestic storage information (please note in the order of storage institution, date and number) none Foreign deposit information (please note in the order of deposit country, institution, date and number) none

120: touch sensing layer 121: Sensing electrode group 121a: the first electrode block 121b: the second electrode block 121c: the third electrode block AA: visible area A1: The first axis A2: The second axis G1: first gap G2: Second Gap R: local area

Claims (14)

A touch display module, comprising: a display panel; and a touch sensing layer embedded in the display panel and comprising a plurality of sensing electrode sets, the sensing electrode sets are sequentially arranged along a first axis, and one of the sensing electrode sets comprises a phase separation a first electrode block, a second electrode block and a third electrode block, wherein the first electrode block is located between the second electrode block and the third electrode block in the first axis on the same side and located between the second electrode block and the third electrode block in a second axis perpendicular to the first axis. The touch display module according to claim 1, wherein the display panel has a visible area, and the second electrode block and the third electrode block respectively extend from opposite edges of the visible area toward each other. The touch display module of claim 1, wherein a first gap is formed between the first electrode block and the second electrode block, and a first gap is formed between the first electrode block and the third electrode block A second gap is formed, and the extending directions of the first gap and the second gap are inclined with respect to the first axial direction and the second axial direction. The touch display module according to claim 3, wherein one end of the first gap is communicated with one end of the second gap. The touch display module of claim 3, wherein at least one of the first gap and the second gap has a zigzag shape. The touch display module of claim 1, wherein the display panel has a viewing area, and the one of the sensing electrode groups further comprises two conductive extensions, and the two conductive extensions are connected to the first electrode block , one of the second electrode block and the third electrode block extends beyond the visible area. The touch display module of claim 1, wherein the one of the sensing electrode groups further comprises a fourth electrode block, and the fourth electrode block is located in the second electrode region along the second axis between the block and the third electrode block, and the second electrode block and the third electrode block are located between the first electrode block and the fourth electrode block in the first axis direction. The touch display module according to claim 7, wherein the first electrode block, the second electrode block, the third electrode block and the fourth electrode block are arranged in a ring shape. The touch display module of claim 1, wherein an outer edge outline of at least one of the first electrode block, the second electrode block and the third electrode block is substantially triangular. The touch display module of claim 1, wherein the orthographic projections of all the sub-pixels of the display panel on the touch sensing layer are located within the range of the sensing electrode groups. The touch display module according to claim 1, wherein the display panel is a liquid crystal display panel or an organic light emitting diode display panel. An electronic device comprising: The touch display module according to any one of claims 1 to 11; and A cover plate is arranged on the touch display module. A touch position detection method is applied to an electronic device comprising a plurality of sensing electrode sets, the sensing electrode sets are arranged in sequence along a first axis, and each comprises a first electrode block separated from each other, a second electrode block and a third electrode block, wherein the first electrode block is located on the same side of the second electrode block and the third electrode block in the first axis, and is on the second electrode block The axial direction is located between the second electrode block and the third electrode block, and the touch position detection method includes: Obtaining a first axis coordinate of a touch point on the first axis according to the sensing electrode set with capacitance change; and A second value of the touch point on the second axis is calculated according to capacitance changes of at least two of the first electrode block, the second electrode block and the third electrode block of the sensing electrode set axis coordinates. The touch position detection method according to claim 13, wherein the step of calculating the second axis coordinate comprises: determining whether the second electrode block and the third electrode block have capacitance changes at the same time; If the second electrode block and the third electrode block have capacitance changes at the same time, the second axis is calculated according to the capacitance changes of the first electrode block, the second electrode block and the third electrode block coordinates; and If the second electrode block and the third electrode block do not have capacitance changes at the same time, according to the capacitance changes of the first electrode block and the second electrode block or the first electrode block and the third electrode The second axis coordinate is calculated from the capacitance change of the block.

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