Signal penetration type touch panel and sensing module thereof

Abstract

The invention discloses a signal penetration type touch panel and a sensing module thereof. The sensing module defines an annular signal channel along a thickness direction. The sensing module comprises a grounding layer and an electrode layer located on one side of the grounding layer. The electrode layer comprises a plurality of first electrodes, a plurality of second electrodes and a plurality of metal pads arranged between the first electrodes and the second electrodes in a spaced mode. The plurality of first electrodes are arranged in a plurality of rows parallel to each other, the plurality of second electrodes are arranged in a plurality of rows parallel to each other, and at least one row of first electrodes and at least one row of second electrodes cross the annular signal channel. Any multiple metal pads are not arranged in the annular signal channel. The grounding layer defines a projection space along the thickness direction, and the projection space covers the plurality of first electrodes and the plurality of second electrodes. Therefore, the annular signal channel can carry out signal transmission without influencing the operation of the first electrode layer and the second electrode layer.

Description

TECHNICAL FIELD

[0001] The present application relates to a touchpad, in particular to a signal penetration type touchpad and a sensing module thereof. BACKGROUND

[0002] The prior art touchpad only considers how to improve sensing accuracy when configuring the layout of its components (such as the driving electrode layer, the sensing electrode layer, or the ground layer), but does not consider how to more properly match the near field communication (NFC) antenna. Therefore, the present inventor believes that the above-mentioned defects can be improved, and after years of research and application of scientific principles, finally proposes the present application which is reasonably designed and effectively improves the above-mentioned defects. SUMMARY

[0003] The purpose of the embodiments of the present application is to provide a signal penetration type touchpad and a sensing module thereof, which can effectively improve the defects that may be generated by the prior art touchpad.

[0004] The embodiments of the present application disclose a signal penetration type touchpad, which defines a ring-shaped signal channel along a thickness direction, and the signal penetration type touchpad comprises: a ground layer, which defines a first side and a second side on opposite sides thereof along the thickness direction; a circuit layer, which is located on the first side of the ground layer along the thickness direction, and the circuit layer comprises a near field communication antenna arranged in the ring-shaped signal channel; a first electrode layer, which is located on the second side of the ground layer along the thickness direction, and the first electrode layer comprises: a plurality of first electrodes arranged in a plurality of columns parallel to each other; wherein at least one column of first electrodes crosses the ring-shaped signal channel; a plurality of first metal pads are spaced apart from the plurality of first electrodes, and the ring-shaped signal channel is not provided with any plurality of first metal pads; a second electrode layer, which is located on the second side of the ground layer along the thickness direction, and the second electrode layer comprises: a plurality of second electrodes arranged in a plurality of rows parallel to each other; wherein at least one row of second electrodes crosses the ring-shaped signal channel; a plurality of second metal pads are spaced apart from the plurality of second electrodes, and the ring-shaped signal channel is not provided with any plurality of second metal pads; wherein the ground layer defines a projection space along the thickness direction, which covers the plurality of first electrodes and the plurality of second electrodes.

[0005] Optionally, the ground layer comprises: a connection section; a plurality of shielding sections parallel to each other and each in a long strip-shaped structure, and each shielding section has a connection end and a free end located on opposite ends thereof; wherein the connection ends of the plurality of shielding sections are connected to the connection section, and the free ends of the plurality of shielding sections are spaced apart from the connection section.

[0006] Optionally, each column of the first electrodes is parallel to a first direction perpendicular to the thickness direction, and each row of the second electrodes is parallel to a second direction perpendicular to the thickness direction; the connection segment is annular, and the plurality of shielding segments are located in an area surrounded by the connection segment, and each shielding segment is parallel to the first direction.

[0007] Optionally, the first direction is perpendicular to the second direction, each column of the first electrodes is connected along the first direction, and each row of the second electrodes is electrically coupled to each other.

[0008] Optionally, a plurality of layout areas are defined between any two shielding segments adjacent to each other, and a plurality of first metal pads are orthogonally projected on a plurality of first projection areas respectively formed by the ground layer along the thickness direction, each of which is located in one layout area.

[0009] Optionally, a plurality of second metal pads are orthogonally projected on a plurality of second projection areas respectively formed by the ground layer along the thickness direction, each of which is located in one layout area.

[0010] Optionally, at least one first projection area overlaps one second projection area.

[0011] Optionally, the circuit layer comprises a shielding net surrounding the outside of the near field communication antenna, and an outer contour of the shielding net is a non-closed ring shape.

[0012] Optionally, the signal penetration type touchpad comprises a plurality of conductive columns, each of which is arranged along the thickness direction, and each of which is connected to the ground layer and the shielding net at two ends respectively.

[0013] Optionally, a plurality of first electrodes are orthogonally projected on a projection area commonly formed by the second electrode layer along the thickness direction, and an outer shape of the projection area is substantially complementary to the plurality of second electrodes.

[0014] The embodiment of the present application also discloses a sensing module of a signal penetration type touchpad, which defines an annular signal channel along a thickness direction, and the sensing module comprises: a ground layer, which defines a first side and a second side respectively located at opposite sides thereof along the thickness direction; the ground layer comprises: a connection segment; a plurality of shielding segments, which are parallel to each other and each have a long strip shape, and each of the shielding segments has a connection end and a free end respectively located at opposite ends thereof; wherein the connection ends of the plurality of shielding segments are connected to the connection segment, and the free ends of the plurality of shielding segments are spaced from the connection segment; a first electrode layer, which is located at the second side of the ground layer along the thickness direction, and the first electrode layer comprises a plurality of first electrodes arranged in a plurality of columns parallel to each other; wherein at least one column of the first electrodes crosses the annular signal channel; a second electrode layer, which is located at the second side of the ground layer along the thickness direction, and the second electrode layer comprises a plurality of second electrodes arranged in a plurality of rows parallel to each other; wherein at least one row of the second electrodes crosses the annular signal channel; wherein the ground layer defines a projection space along the thickness direction, which covers the plurality of first electrodes and the plurality of second electrodes.

[0015] Optionally, each column of the first electrodes is parallel to a first direction perpendicular to the thickness direction, and each row of the second electrodes is parallel to a second direction perpendicular to the thickness direction; the connection segment is annular, and the plurality of shielding segments are located in a region surrounded by the connection segment, and each shielding segment is parallel to the first direction.

[0016] Optionally, the first electrode layer comprises a plurality of first metal pads spaced apart from the plurality of first electrodes, and none of the plurality of first metal pads is disposed within the annular signal channel; and the second electrode layer comprises a plurality of second metal pads spaced apart from the plurality of second electrodes, and none of the plurality of second metal pads is disposed within the annular signal channel.

[0017] Optionally, each two shielding segments adjacent to each other define a layout region, and the plurality of first metal pads are orthogonally projected on a plurality of first projection regions of the ground layer respectively, each of which is located in a layout region.

[0018] Optionally, the plurality of second metal pads are orthogonally projected on a plurality of second projection regions of the ground layer respectively, each of which is located in a layout region.

[0019] Optionally, at least one first projection region completely overlaps one second projection region.

[0020] The embodiment of the present application further discloses a sensing module of a signal penetration type touchpad, which defines an annular signal channel along a thickness direction, and the sensing module comprises: a ground layer defining a first side and a second side respectively located on opposite sides thereof along the thickness direction; an electrode layer located on the second side of the ground layer along the thickness direction, the electrode layer comprising: a plurality of first electrodes arranged in a plurality of columns parallel to each other, each of which is parallel to a first direction perpendicular to the thickness direction; wherein at least one column of the first electrodes crosses the annular signal channel in the first direction; a plurality of second electrodes arranged in a plurality of rows parallel to each other, each of which is parallel to a second direction perpendicular to the thickness direction; wherein at least one row of the second electrodes crosses the annular signal channel in the second direction; a plurality of metal pads spaced apart from the plurality of first electrodes and the plurality of second electrodes, and none of the plurality of metal pads is disposed within the annular signal channel; wherein the ground layer defines a projection space along the thickness direction, which covers the plurality of first electrodes and the plurality of second electrodes.

[0021] Optionally, the ground layer comprises: a connection segment; a plurality of shielding segments parallel to each other and each in a long strip structure, and each shielding segment has a connection end and a free end respectively located on opposite ends; wherein the connection ends of the plurality of shielding segments are connected to the connection segment, and the free ends of the plurality of shielding segments are spaced apart from the connection segment.

[0022] Optionally, a plurality of layout regions are defined between any two shielding segments adjacent to each other, and a plurality of projection regions formed by the plurality of metal pads in the thickness direction orthogonal projection on the ground layer are each located within one layout region.

[0023] Optionally, the plurality of first electrodes have a shape substantially complementary to the plurality of second electrodes.

[0024] In summary, the signal penetration type touchpad and the sensing module thereof disclosed in the embodiments of the present application can make the near field communication antenna transmit signals through the annular signal channel and its corresponding related components without affecting the operation of the first electrode layer and the second electrode layer.

[0025] For a better understanding of the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the description and drawings are only used to illustrate the present application, and do not limit the scope of protection of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a cross-sectional view of a signal penetration type touchpad according to an embodiment of the present application.

[0027] Figure 2 FIG. 2 is a top view of a ground layer according to an embodiment of the present application.

[0028] Figure 3 FIG. 3 is an enlarged view of region III of FIG. 2. Figure 2

[0029] Figure 4 FIG. 4 is a top view of a circuit layer according to an embodiment of the present application.

[0030] Figure 5 FIG. 5 is a top view of a first electrode layer according to an embodiment of the present application.

[0031] Figure 6 FIG. 6 is an enlarged view of region VI of FIG. 5. Figure 5

[0032] Figure 7 FIG. 7 is a top view of a second electrode layer according to an embodiment of the present application.

[0033] Figure 8 FIG. 8 is an enlarged view of region VIII of FIG. 7. Figure 7

[0034] FIG. 9 is a schematic view of the stack of FIG. 8, FIG. 9, and FIG. 10 in the thickness direction. Figure 9 Figure 6 Figure 7 Figure 3

[0035] Figure 10 ​​​​​​A cross-sectional view of a signal penetration type touchpad according to an embodiment of the present application.

[0036] Figure 11 A top view of an electrode layer according to an embodiment of the present application.

[0037] Figure 12 A cross-sectional view of a signal penetration type touchpad according to an embodiment of the present application. Figure 11 An enlarged view of region XII.

[0038] Figure 13 A cross-sectional view of a signal penetration type touchpad according to an embodiment of the present application. Figure 12 A cross-sectional view of a signal penetration type touchpad according to an embodiment of the present application. DETAILED DESCRIPTION

[0039] The following is a detailed description of the application disclosed herein, specifically illustrating the embodiments of the "signal penetration type touchpad and sensing module thereof". Those skilled in the art will appreciate the advantages and superiorities of the application from the disclosure of the specification. The application can be implemented or applied by other different embodiments, and the details in the specification can be modified and changed based on different viewpoints and applications without departing from the concept of the application. In addition, the drawings of the application are only simple schematic illustrations and not actual size depictions, as previously stated. The following embodiments will further illustrate the technical content of the application, but the disclosure is not intended to limit the scope of protection of the application.

[0040] It should be understood that although the terms "first", "second", "third", etc. can be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein can include any combination of one or more associated listed items.

[0041] [Embodiment 1]

[0042] Referring to FIG. 1, an embodiment of the present application is shown. As shown in FIG. 1, the embodiment discloses a signal penetration type touchpad 100, which defines a ring-shaped signal channel C along a thickness direction H. It should be noted that the ring-shaped signal channel C is illustrated in a square ring shape in this embodiment, and the coverage space of the ring-shaped signal channel C penetrates the signal penetration type touchpad 100 along the thickness direction H, but the present application is not limited thereto. Figures 1 to 9 Figure 1 As shown in FIG. 1, the embodiment discloses a signal penetration type touchpad 100, which defines a ring-shaped signal channel C along a thickness direction H. It should be noted that the ring-shaped signal channel C is illustrated in a square ring shape in this embodiment, and the coverage space of the ring-shaped signal channel C penetrates the signal penetration type touchpad 100 along the thickness direction H, but the present application is not limited thereto.

[0043] ​In this embodiment, the signal-penetrating touch panel 100 includes a ground layer 1, a circuit layer 2 located on one side of the ground layer 1, a plurality of conductive posts 3 connecting the ground layer 1 and the circuit layer 2, a first electrode layer 4 and a second electrode layer 5 located on the other side of the ground layer 1, and a plurality of insulating layers 6.

[0044] Furthermore, any two adjacent layers among the ground layer 1, the circuit layer 2, the first electrode layer 4, and the second electrode layer 5 are separated by an insulating layer 6, and each conductive post 3 is disposed along the thickness direction H and embedded within the insulating layer 6 located between the ground layer 1 and the circuit layer 2, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, any two adjacent layers among the ground layer 1, the circuit layer 2, the first electrode layer 4, and the second electrode layer 5 may also be respectively disposed on two insulating layers 6 fixed to at least one external member, but without any insulating layer 6 between them.

[0045] It should be further noted that the ground layer 1, the first electrode layer 4, and the second electrode layer 5 in this embodiment can also be collectively defined as a sensing module M, which can also define the annular signal channel C along the thickness direction H. Furthermore, although the signal-penetrating touch panel 100 in this embodiment is described using the aforementioned multiple components in cooperation, the present invention is not limited thereto. For example, in other embodiments not shown in the present invention, the sensing module M can be used independently (e.g., for sale) or in conjunction with other components. The structure of each component of the signal-penetrating touch panel 100 in this embodiment and their interconnections will be described below.

[0046] like Figures 1 to 3 As shown, the grounding layer 1 is defined along the thickness direction H with a first side S1 and a second side S2 located on opposite sides, and the grounding layer 1 includes a connecting segment 11 and a plurality of shielding segments 12 connected to the connecting segment 11. In this embodiment, the connecting segment 11 is annular, and the plurality of shielding segments 12 are located in the area surrounded by the connecting segment 11. The plurality of shielding segments 12 are arranged parallel to each other and spaced apart, and each shielding segment 12 is elongated and parallel to a first direction D1 perpendicular to the thickness direction H.

[0047] More specifically, each of the shielding segments 12 has a connecting end 121 and a free end 122 located at opposite ends, the connecting ends 121 of the plurality of shielding segments 12 are connected to the connecting segment 11, and the free ends 122 of each of the shielding segments 12 are spaced apart from the connecting segment 11 to form a gap G.

[0048] In this embodiment, the plurality of shielding segments 12 have substantially the same structure, and the connecting ends 121 of the plurality of shielding segments 12 are connected to the same side of the connecting segment 11 (e.g.: Figure 2 The right side of the connecting segment 11, so that the plurality of gaps G are arranged in a second direction D2 perpendicular to the thickness direction H and the first direction D1, but the invention is not limited thereto. For example, in other embodiments not shown in the invention, the construction of the plurality of shielding segments 12 may also be slightly different; or, the connecting end 121 of each shielding segment 12 may also be connected to one of the two opposite sides of the connecting segment 11 according to actual needs (e.g.: Figure 2 (one of the left side and the right side of the connecting segment 11).

[0049] Therefore, in this embodiment, the grounding layer 1, through the structural combination between the connecting segment 11 and the plurality of shielding segments 12 (e.g., the free ends 122 of the plurality of shielding segments 12 are spaced apart from the connecting segment 11 by the plurality of gaps G), avoids the grounding layer 1 from forming a closed loop, thereby affecting the operation of the signal-penetrating touch panel 100. In other words, the area surrounded by the connecting segment 11 and each of the shielding segments 12 is not closed, and the multiple areas surrounded by the connecting segment 11 and the plurality of shielding segments 12 can be interconnected through the plurality of gaps G.

[0050] Furthermore, a plurality of layout areas R may be defined between any two adjacent shielding segments 12. More specifically, each shielding segment 12 has two long side edges 123 connected between the connecting end 121 and the free end 122, and each long side edge 123 forms a plurality of notches 124 spaced apart along the first direction D1. In two long side edges 123 belonging to different shielding segments 12 but facing each other, each notch 124 of one long side edge 123 corresponds along the second direction D2 to a notch 124 of the other long side edge 123, thus collectively surrounding and defining one layout area R.

[0051] like Figure 1 , Figure 2 and Figure 4 As shown, the line layer 2 is located on the first side S1 of the ground layer 1 along the thickness direction H, and in this embodiment, the line layer 2 includes a near-field communication antenna 21 disposed within the ring signal channel C and a shielding mesh 22 surrounding the outside of the near-field communication antenna 21.

[0052] Furthermore, each of the conductive posts 3 has its two ends connected to the grounding layer 1 and the shielding mesh 22 respectively, thereby forming a common ground connection. The distribution of the multiple conductive posts 3 can be adjusted according to actual needs, and this embodiment does not impose any limitations. Moreover, the outer contour of the shielding mesh 22 can be selected as a non-closed ring (e.g., the outer contour of the shielding mesh 22 is generally C-shaped) to avoid the shielding mesh 22 forming a closed loop, thereby affecting the operation of the signal-penetrating touch panel 100.

[0053] like Figure 1 As shown, the first electrode layer 4 and the second electrode layer 5 are located on the second side S2 of the ground layer 1 along the thickness direction H, and the second electrode layer 5 is located between the first electrode layer 4 and the ground layer 1. In this embodiment, the first electrode layer 4 is described as a sensing electrode (Rx) layer, and the second electrode layer 5 is a driving electrode (Tx) layer, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, the first electrode layer 4 may be a driving electrode (Tx) layer, and the second electrode layer 5 may be a sensing electrode (Rx) layer.

[0054] like Figure 1 , Figure 5 and Figure 6 As shown, the first electrode layer 4 includes a plurality of first electrodes 41 and a plurality of first metal pads 42 spaced apart from the plurality of first electrodes 41. The plurality of first electrodes 41 are arranged in multiple parallel columns spaced apart from each other, and in this embodiment, each column of first electrodes 41 is parallel to the first direction D1 (that is, the plurality of first electrodes 41 in each column are connected along the first direction D1). Furthermore, at least one column of first electrodes 41 traverses the annular signal channel C, but no first metal pads 42 are disposed within the annular signal channel C. In other words, in this embodiment, the plurality of first metal pads 42 are distributed on the inner and outer sides of the annular signal channel C.

[0055] like Figure 1 , Figure 7 and Figure 8 As shown, the second electrode layer 5 includes a plurality of second electrodes 51 and a plurality of second metal pads 52 spaced apart from the plurality of second electrodes 51. The plurality of second electrodes 51 are arranged in multiple parallel rows, and in this embodiment, the plurality of second electrodes 51 in each row are electrically coupled to each other and parallel to the second direction D2. Furthermore, at least one row of second electrodes 51 traverses the annular signal channel C, but no second metal pads 52 are disposed within the annular signal channel C. That is, in this embodiment, the plurality of second metal pads 52 are distributed on the inner and outer sides of the annular signal channel C.

[0056] Furthermore, such as Figure 1 and Figures 5 to 9 As shown, in order for the first electrode layer 4 and the second electrode layer 5 to work together to provide optional performance, a plurality of first electrodes 41 are projected orthogonally along the thickness direction H onto a projection area formed by the second electrode layer 5, and their shape can be generally complementary to the plurality of second electrodes 51.

[0057] Furthermore, in this embodiment, the plurality of first metal pads 42 and the plurality of second metal pads 52 are used as dummy pads and do not possess any electrical functions related to the operation of the signal-transmitting touchpad 100. However, the configuration number of the plurality of first metal pads 42 and the plurality of second metal pads 52 can be adjusted according to design requirements to facilitate the overall weight and balance of the signal-transmitting touchpad 100. In other words, in other embodiments of the present invention not shown, the plurality of first metal pads 42 and / or the plurality of second metal pads 52 may be omitted according to actual needs.

[0058] Furthermore, the grounding layer 1 defines a projection space along the thickness direction H, which covers a plurality of first electrodes 41 and a plurality of second electrodes 51, thereby enabling the plurality of first electrodes 41 and the plurality of second electrodes 51 to pass through the grounding layer 1 and effectively shield external signals from the first side S1 of the grounding layer 1.

[0059] Furthermore, the plurality of first metal pads 42 are orthogonally projected along the thickness direction H onto the plurality of first projection areas formed by the ground layer 1, each located within one of the layout areas R. Moreover, the plurality of second metal pads 52 are orthogonally projected along the thickness direction H onto the plurality of second projection areas formed by the ground layer 1, each located within one of the layout areas R.

[0060] In other words, in this embodiment, the plurality of first projection regions respectively (completely) overlap with the plurality of second projection regions, but the present invention is not limited thereto. For example, in other embodiments of the present invention not shown, the plurality of first projection regions may also overlap only one of the second projection regions according to actual needs.

[0061] As described above, in this embodiment, the signal-penetrating touch panel 100 (or the sensing module M) can be configured through the ring signal channel C and its corresponding related components so that the near-field communication antenna 21 can transmit signals through the ring signal channel C without affecting the operation of the first electrode layer 4 and the second electrode layer 5.

[0062] [Example 2]

[0063] Please see Figures 10 to 13 As shown, this is Embodiment Two of the present invention. Since this embodiment is similar to Embodiment One described above, the similarities between the two embodiments will not be repeated. The main differences between this embodiment and Embodiment One are as follows:

[0064] This embodiment discloses a signal-penetrating touch panel 100, which includes a ground layer 1, a circuit layer 2 located on one side of the ground layer 1, a plurality of conductive posts 3 connecting the ground layer 1 and the circuit layer 2, an electrode layer 7 located on the other side of the ground layer 1, and a plurality of insulating layers 6. The ground layer 1 and the electrode layer 7 can be collectively defined as a sensing module M, and the signal-penetrating touch panel 100 or the sensing module M defines a ring-shaped signal channel C along a thickness direction H.

[0065] Furthermore, in this embodiment, the signal-penetrating touch panel 100 is equivalent to integrating the first electrode layer and the second electrode layer described in Embodiment 1 into an electrode layer 7 located on top of the insulating layer 6. Therefore, the following content will mainly describe the electrode layer 7 and its related connection relationships.

[0066] Furthermore, the construction of other components of the signal-penetrating touch panel 100 in this embodiment (such as the ground layer 1, the circuit layer 2, the plurality of conductive posts 3, and the plurality of insulating layers 6) is generally the same as described in Embodiment 1, and will not be repeated here. For example, in this embodiment, the ground layer 1 is defined along the thickness direction H as a first side S1 and a second side S2 located on opposite sides, and the ground layer 1 includes a connecting segment 11 and a plurality of shielding segments 12 connected to the connecting segment 11. The plurality of shielding segments 12 are arranged parallel to each other and spaced apart, and a plurality of layout areas R are defined between any two adjacent shielding segments 12. Each shielding segment 12 has a connecting end 121 and a free end 122 located on opposite ends, the connecting ends 121 of the plurality of shielding segments 12 are connected to the connecting segment 11, and the free ends 122 of the plurality of shielding segments 12 are spaced apart from the connecting segment 11.

[0067] The electrode layer 7 is located on the second side S2 of the ground layer 1 along the thickness direction H, and the electrode layer 7 includes a plurality of first electrodes 71, a plurality of second electrodes 72, and a plurality of metal pads 73 spaced between the plurality of first electrodes 71 and the plurality of second electrodes 72. In this embodiment, the plurality of first electrodes 71 are described as sensing electrodes (Rx), and the plurality of second electrodes 72 are driving electrodes (Tx), but the invention is not limited thereto. For example, in other embodiments not shown in the invention, the plurality of first electrodes 71 may be driving electrodes (Tx), and the plurality of second electrodes 72 may be sensing electrodes (Rx).

[0068] A plurality of the first electrodes 71 are arranged in multiple parallel columns spaced apart from each other, and in this embodiment, each column of the first electrodes 71 is parallel to a first direction D1 perpendicular to the thickness direction H (that is, the plurality of first electrodes 71 in each column are connected along the first direction D1). Furthermore, at least one column of the first electrodes 71 traverses the annular signal channel C.

[0069] A plurality of second electrodes 72 are arranged in multiple parallel rows, and in this embodiment, the plurality of second electrodes 72 in each row are electrically coupled to each other and parallel to a second direction D2 perpendicular to the thickness direction H and the first direction D1, while the shapes of the plurality of first electrodes 71 are generally complementary to the plurality of second electrodes 72. Furthermore, at least one row of second electrodes 72 traverses the annular signal channel C.

[0070] Furthermore, no metal pads 73 are disposed within the annular signal channel C; that is, in this embodiment, the metal pads 73 are distributed on the inner and outer sides of the annular signal channel C. Moreover, in this embodiment, the metal pads 73 are used as dummy pads and do not possess any electrical function related to the operation of the signal-penetrating touchpad 100. However, the number of metal pads 73 can be adjusted according to design requirements to facilitate the overall weight and balance of the signal-penetrating touchpad 100.

[0071] The grounding layer 1 defines a projection space along the thickness direction H, which covers a plurality of first electrodes 71 and a plurality of second electrodes 72, thereby enabling the plurality of first electrodes 71 and a plurality of second electrodes 72 to effectively shield external signals from the first side S1 of the grounding layer 1 through the grounding layer 1. Furthermore, a plurality of metal pads 73 are orthographically projected along the thickness direction H onto a plurality of projection areas formed by the grounding layer 1, each located within a layout area R.

[0072] [Technical Effects of the Embodiments of the Invention]

[0073] In summary, the signal-penetrating touchpad and its sensing module disclosed in the embodiments of the present invention can be configured through the ring signal channel and its corresponding related components to enable the near-field communication antenna to transmit signals through the ring signal channel without affecting the operation of the first electrode layer and the second electrode layer.

[0074] The above-disclosed content is only an optional and feasible embodiment of the present invention, and is not intended to limit the patent scope of the present invention. Therefore, all equivalent technical changes made based on the content of the present invention specification and drawings are included within the patent scope of the present invention.

Claims

1. A signal-penetrating touchpad, characterized by, The signal-penetrating touchpad defines a ring-shaped signal channel along a thickness direction, and comprises: a ground layer defining a first side and a second side respectively on opposite sides along the thickness direction; a circuit layer located on the first side of the ground layer along the thickness direction, and comprising a near field communication antenna arranged in the ring-shaped signal channel; a first electrode layer located on the second side of the ground layer along the thickness direction, comprising: a plurality of first electrodes arranged in parallel columns, wherein at least one column of the first electrodes crosses the ring-shaped signal channel; and a plurality of first metal pads spaced apart from the first electrodes, and no first metal pad is arranged in the ring-shaped signal channel; and a second electrode layer located on the second side of the ground layer along the thickness direction, comprising: a plurality of second electrodes arranged in parallel rows, wherein at least one row of the second electrodes crosses the ring-shaped signal channel; and a plurality of second metal pads spaced apart from the second electrodes, and no second metal pad is arranged in the ring-shaped signal channel; wherein the ground layer defines a projection space along the thickness direction covering the first electrodes and the second electrodes.

2. The signal-penetrating touchpad of claim 1, wherein, The ground layer comprises: a connection section; and a plurality of shielding sections parallel to each other and each in a long strip structure, and each shielding section has a connection end and a free end respectively on opposite ends; wherein the connection ends of the shielding sections are connected to the connection section, and the free ends of the shielding sections are spaced apart from the connection section.

3. The signal-penetrating touchpad of claim 2, wherein, Each column of the first electrodes is parallel to a first direction perpendicular to the thickness direction, and each row of the second electrodes is parallel to a second direction perpendicular to the thickness direction; the connection section is ring-shaped, and the shielding sections are located in an area surrounded by the connection section, and each shielding section is parallel to the first direction.

4. The signal-penetrating touchpad of claim 3, wherein, The first direction is perpendicular to the second direction, each column of the first electrodes is connected along the first direction, and each row of the second electrodes is electrically coupled to each other.

5. The signal-penetrating touchpad of claim 2, wherein, Any two shielding sections adjacent to each other define a plurality of layout areas, and a plurality of first projection areas formed by the first metal pads on the ground layer along the thickness direction are each located in one of the layout areas.

6. The signal-penetrating touchpad of claim 5, wherein, A plurality of second projection areas formed by the second metal pads on the ground layer along the thickness direction are each located in one of the layout areas.

7. The signal-penetrating touchpad of claim 6, wherein, At least one of the first projection areas overlaps one of the second projection areas.

8. The signal-penetrating touchpad of claim 1, wherein, The circuit layer comprises a shielding mesh surrounding the outside of the near field communication antenna, and the outer contour of the shielding mesh is a non-closed ring.

9. The signal-penetrating touchpad of claim 8, wherein, The signal-penetrating touchpad comprises a plurality of conductive posts, each of which is arranged along the thickness direction, and both ends of each conductive post are connected to the ground layer and the shielding mesh respectively.

10. The signal-penetrating touchpad of claim 1, wherein, The first electrodes are projected onto a projection area formed by the second electrode layer along the thickness direction, and the projection area is substantially complementary to the second electrodes.

11. A sensing module of a signal-penetrating touchpad, characterized in that, The sensing module of the signal-penetrating touchpad defines a ring-shaped signal channel along a thickness direction, and the sensing module comprises: a ground layer defining a first side and a second side on opposite sides along the thickness direction; the ground layer comprises: a connection section; and a plurality of shielding sections parallel to each other and each in a long strip shape, and each of the shielding sections has a connection end and a free end on opposite ends; wherein the connection ends of the shielding sections are connected to the connection section, and the free ends of the shielding sections are spaced from the connection section; a first electrode layer located on the second side of the ground layer along the thickness direction, the first electrode layer comprising a plurality of first electrodes arranged in a plurality of columns parallel to each other; wherein at least one column of the first electrodes crosses the ring-shaped signal channel; and a second electrode layer located on the second side of the ground layer along the thickness direction, the second electrode layer comprising a plurality of second electrodes arranged in a plurality of rows parallel to each other; wherein at least one row of the second electrodes crosses the ring-shaped signal channel; wherein the ground layer defines a projection space along the thickness direction, covering the first electrodes and the second electrodes.

12. The sensing module of claim 11, wherein, Each column of the first electrodes is parallel to a first direction perpendicular to the thickness direction, and each row of the second electrodes is parallel to a second direction perpendicular to the thickness direction; the connection section is ring-shaped, and the shielding sections are located in the area surrounded by the connection section, and each shielding section is parallel to the first direction.

13. The sensing module of claim 11, wherein, The first electrode layer comprises a plurality of first metal pads spaced from the first electrodes, and the ring-shaped signal channel is not provided with any of the first metal pads; the second electrode layer comprises a plurality of second metal pads spaced from the second electrodes, and the ring-shaped signal channel is not provided with any of the second metal pads.

14. The sensing module of claim 13, wherein, A plurality of layout areas are defined between any two adjacent shielding sections, and a plurality of first projection areas formed by the ground layer along the thickness direction are each located in one of the layout areas.

15. The sensing module of claim 14, wherein, A plurality of second projection areas formed by the ground layer along the thickness direction are each located in one of the layout areas.

16. The sensing module of claim 15, wherein, At least one of the first projection areas completely overlaps one of the second projection areas.

17. A sensing module of a signal-penetrating touchpad, characterized in that, The sensing module of the signal-penetrating touchpad defines a ring-shaped signal channel along a thickness direction, and the sensing module comprises: a ground layer defining a first side and a second side on opposite sides along the thickness direction; and an electrode layer located on the second side of the ground layer along the thickness direction, the electrode layer comprising: a plurality of first electrodes arranged in a plurality of columns parallel to each other, each of which is parallel to a first direction perpendicular to the thickness direction; wherein at least one column of the first electrodes extends across the annular signal channel in the first direction; a plurality of second electrodes arranged in a plurality of rows parallel to each other, each of which is parallel to a second direction perpendicular to the thickness direction; wherein at least one row of the second electrodes extends across the annular signal channel in the second direction; and a plurality of metal pads spaced between the plurality of first electrodes and the plurality of second electrodes, and the annular signal channel is free of any of the plurality of metal pads; and wherein the ground layer defines a projection space along the thickness direction, which covers the plurality of first electrodes and the plurality of second electrodes.

18. The sensing module of claim 17, wherein, The ground layer comprises: a connection section; and a plurality of shielding sections parallel to each other and each in a strip-like configuration, and each of the shielding sections has a connection end and a free end located at opposite ends, respectively; wherein the connection ends of the plurality of shielding sections are connected to the connection section, and the free ends of the plurality of shielding sections are spaced from the connection section.

19. The sensing module of claim 18, wherein, A plurality of layout areas are defined between any two of the shielding sections adjacent to each other, and a plurality of projection areas formed by the ground layer in the thickness direction onto which the plurality of metal pads are orthographically projected, each of which is located within one of the layout areas.

20. The sensing module of claim 18, wherein, The plurality of first electrodes have a shape substantially complementary to the plurality of second electrodes.

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