Touch substrate and touch display device

Abstract

The present disclosure provides a touch-sensitive substrate and a touch-sensitive display device. The touch-sensitive substrate includes a substrate, and a first electrode layer and a second electrode layer stacked on the substrate. The first electrode layer includes a first channel pattern and a first dummy electrode pattern, and the second electrode layer includes a second channel pattern and a second dummy electrode pattern. The first channel pattern and the second channel pattern are insulated and intersecting, and the second channel pattern is insulated from the second dummy electrode pattern. The first dummy electrode pattern includes a first dummy electrode sub-pattern, and the second dummy electrode pattern includes a second dummy electrode sub-pattern. The first dummy electrode sub-pattern is electrically connected to the first channel pattern and the second dummy electrode sub-pattern, respectively. The first dummy electrode sub-pattern and the second dummy electrode sub-pattern are used to transmit touch detection signals to the first channel pattern. The disclosed embodiments simplify the manufacturing process and also help reduce production costs.

Description

Technical Field

[0001] The present disclosure relates to the field of display technology, and in particular to a touch substrate and a touch display device. Background Art

[0002] A touch module generally includes a transmitting electrode and a receiving electrode that are stacked and insulated. In related art, in order to achieve signal transmission, a signal transmission line stacked with the transmitting electrode and the receiving electrode is generally provided. Summary of the Invention

[0003] The embodiments of the present disclosure provide a touch substrate and a touch display device to solve the problems of complex manufacturing processes and high production costs of existing touch substrates.

[0004] In a first aspect, embodiments of the present disclosure provide a touch control substrate, comprising a substrate, and a first electrode layer and a second electrode layer stacked on the substrate, wherein the first electrode layer comprises a first channel pattern and a first dummy electrode pattern, the first channel pattern being configured to transmit a touch detection signal, and the second electrode layer comprises a second channel pattern and a second dummy electrode pattern, the first channel pattern and the second channel pattern being insulated from each other and intersecting, the second channel pattern being configured to receive the touch detection signal transmitted by the first channel pattern, and the second channel pattern being insulated from the second dummy electrode pattern.

[0005] The first virtual electrode pattern includes a first virtual electrode sub-pattern, and the second virtual electrode pattern includes a second virtual electrode sub-pattern. The first virtual electrode sub-pattern is electrically connected to the first channel pattern and the second virtual electrode sub-pattern, respectively. The first virtual electrode sub-pattern and the second virtual electrode sub-pattern are used to transmit a touch detection signal to the first channel pattern.

[0006] In some embodiments, the present invention further includes a first insulating layer, a second insulating layer and a third insulating layer, wherein the first insulating layer, the first electrode layer, the second insulating layer, the second electrode layer and the third insulating layer are stacked in sequence.

[0007] In some embodiments, the orthographic projections of the first insulating layer and the third insulating layer on the substrate coincide with each other.

[0008] In some embodiments, the touch substrate includes a via hole penetrating the second insulating layer, and the first dummy electrode sub-pattern and the second dummy electrode sub-pattern are electrically connected through the via hole.

[0009] In some embodiments, a mesh density of the first electrode layer in a region corresponding to the via hole is greater than a mesh density of a region outside the via hole.

[0010] In some embodiments, the orthographic projection of the via on the substrate is located at an overlapping position of the orthographic projection of the first virtual electrode sub-pattern on the substrate and the orthographic projection of the second virtual electrode sub-pattern on the substrate.

[0011] In some embodiments, in an area outside the via hole, an orthographic projection of the first virtual electrode sub-pattern on the substrate and an orthographic projection of the second virtual electrode sub-pattern on the substrate do not overlap.

[0012] In some embodiments, the first virtual electrode pattern further includes a third virtual electrode sub-pattern in addition to the first virtual electrode sub-pattern, and the second virtual electrode pattern further includes a fourth virtual electrode sub-pattern in addition to the second virtual electrode sub-pattern;

[0013] The third virtual electrode sub-patterns and the second channel patterns are alternately arranged, and the fourth virtual electrode sub-patterns and the first channel patterns are alternately arranged.

[0014] In some embodiments, the orthographic projection of the third virtual electrode sub-pattern on the substrate and the orthographic projection of the second channel pattern on the substrate partially overlap; and / or

[0015] The orthographic projection of the fourth virtual electrode sub-pattern on the substrate and the orthographic projection of the first channel pattern on the substrate partially cross and overlap.

[0016] In some embodiments, the wiring width of the first electrode layer in the area corresponding to the via hole is greater than the wiring width in the area outside the via hole; and / or

[0017] The wiring width of the second electrode layer in the area corresponding to the via hole is greater than the wiring width in the area outside the via hole.

[0018] A display substrate includes a substrate and a touch module located on the substrate, the touch module including a first electrode layer and a second electrode layer arranged in a cross pattern, the first electrode layer including a first channel pattern and a first dummy electrode pattern, the first channel pattern being used to transmit a touch detection signal, the second electrode layer including a second channel pattern and a second dummy electrode pattern, the first channel pattern and the second channel pattern being insulated from each other, the second channel pattern being used to receive the touch detection signal transmitted by the first channel pattern, and the second channel pattern being insulated from the second dummy electrode pattern;

[0019] The first virtual electrode pattern includes a first virtual electrode sub-pattern, the second virtual electrode pattern includes a second virtual electrode sub-pattern, the first virtual electrode sub-pattern is electrically connected to the first channel pattern and the second virtual electrode sub-pattern, and the first virtual electrode sub-pattern and the second virtual electrode sub-pattern are used to transmit a touch detection signal to the first channel pattern.

[0020] In some embodiments, the touch module further includes a first protective layer, a second protective layer, and a third protective layer. The first protective layer, the first electrode layer, the second protective layer, the second electrode layer, and the third protective layer are stacked in sequence in a direction away from the substrate, and the orthographic projections of the first protective layer and the third protective layer on the substrate coincide.

[0021] In some embodiments, the display substrate includes a via hole penetrating the second protection layer, and the first dummy electrode sub-pattern and the second dummy electrode sub-pattern are electrically connected through the via hole.

[0022] In some embodiments, an orthographic projection of the via on the substrate is located between an orthographic projection of the first virtual electrode sub-pattern on the substrate and an orthographic projection of the second virtual electrode pattern on the substrate.

[0023] In some embodiments, in an area outside the via hole, an orthographic projection of the first virtual electrode sub-pattern on the substrate and an orthographic projection of the second virtual electrode sub-pattern on the substrate do not overlap.

[0024] In some embodiments, the first virtual electrode pattern further includes a third virtual electrode sub-pattern in addition to the first virtual electrode sub-pattern, and the second virtual electrode pattern further includes a fourth virtual electrode sub-pattern in addition to the second virtual electrode sub-pattern;

[0025] An orthographic projection of the third virtual electrode sub-pattern on the substrate and an orthographic projection of the fourth virtual electrode sub-pattern on the substrate do not overlap.

[0026] In some embodiments, the orthographic projection of the third virtual electrode sub-pattern on the substrate overlaps with the orthographic projection of the second channel pattern on the substrate; and / or

[0027] The orthographic projection of the fourth virtual electrode sub-pattern on the substrate overlaps with the orthographic projection of the first channel pattern on the substrate.

[0028] In a second aspect, an embodiment of the present disclosure provides a touch display device, comprising the display substrate and touch substrate described in any one of the first aspects.

[0029] The embodiment of the present disclosure utilizes the first virtual electrode sub-pattern and the second virtual electrode sub-pattern as the routing for transmitting touch signals, eliminating the need to produce an additional routing layer and reducing one patterning process. In other words, the use of one mask is reduced, simplifying the production steps and also helping to reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the description of the embodiments of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 is a structural diagram of a touch display device provided by an embodiment of the present disclosure;

[0032] Figure 2 is a schematic structural diagram of the first electrode layer in one embodiment of the present disclosure;

[0033] Figure 3 is a schematic structural diagram of the second electrode layer in one embodiment of the present disclosure;

[0034] Figure 4 is a schematic diagram of a stack of a first electrode layer and a second electrode layer in one embodiment of the present disclosure;

[0035] Figure 5 is a schematic diagram of a partial structure of a via hole in one embodiment of the present disclosure;

[0036] Figure 6 is another partial structural diagram of a via hole in one embodiment of the present disclosure;

[0037] Figure 7 is another partial structural diagram of a via hole in one embodiment of the present disclosure;

[0038] Figure 8 3 is another schematic diagram of a stack of the first electrode layer and the second electrode layer in one embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present disclosure in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0040] An embodiment of the present disclosure provides a touch substrate.

[0041] The touch control substrate includes a substrate and a touch control module 100 located on the substrate. Figure 1 As shown, specifically, in one embodiment, the touch substrate specifically includes a substrate made of glass (such as a glass substrate), and the touch substrate also includes a touch module 100 .

[0042] The touch module 100 includes a first electrode layer Metal2 and a second electrode layer Metal1 . The first electrode layer Metal2 and the second electrode layer Metal1 can be manufactured by a metal mesh process, thereby forming the first electrode layer Metal2 and the second electrode layer Metal1 that are arranged in a cross pattern.

[0043] like Figures 2 to 4 As shown, the first electrode layer Metal2 includes a first channel pattern 201 and a first virtual electrode pattern 202, and the second electrode layer Metal1 includes a second channel pattern 203 and a second virtual electrode pattern 204. The first channel pattern 201 and the second channel pattern 203 are insulated, and the second channel pattern 203 and the second virtual electrode pattern 204 are insulated.

[0044] It should be understood that Figures 2 to 4 The lines of different widths are only used to exemplarily distinguish the structures and do not represent the width relationship of the structures.

[0045] In the technical solution of this embodiment, the first channel pattern 201 is used to transmit the touch driving signal, so the second electrode pattern can also be called the driving electrode, and the second channel pattern 203 is used to sense the touch driving signal, so the first channel pattern 201 can also be called the sensing electrode.

[0046] like Figure 2 As shown, the first virtual electrode pattern 202 and the first channel pattern 201 are provided in the same layer and the same material, that is, the first virtual electrode pattern 202 and the first channel pattern 201 are produced in one patterning process. Figure 3 As shown, the second virtual electrode pattern 204 and the second channel pattern 203 are provided in the same layer and made of the same material.

[0047] It's important to note that dummy electrodes, such as the first dummy electrode pattern 202 and the second dummy electrode pattern 204, do not electrically transmit or sense touch detection signals. On the one hand, dummy electrodes can be used to balance visual effects and reduce the possibility of moiré patterns due to optical interference in areas without receiving or transmitting electrodes, such as those without the first and second electrode patterns. On the other hand, dummy electrodes can also ensure pattern uniformity during the manufacturing process, for example, by ensuring more uniform use of the etching solution during etching.

[0048] The first virtual electrode pattern 202 includes a first virtual electrode sub-pattern 2021, and the second virtual electrode pattern 204 includes a second virtual electrode sub-pattern 2041. The first virtual electrode sub-pattern 2021 is electrically connected to the first channel pattern 201 and the second virtual electrode sub-pattern 2041, respectively. The first virtual electrode sub-pattern 2021 and the second virtual electrode sub-pattern 2041 are electrically connected to each other. The first channel pattern 201 transmits touch drive signals through the first virtual electrode sub-pattern 2021 and the second virtual electrode sub-pattern 2041.

[0049] like Figure 3 As shown, in this embodiment, the second virtual electrode sub-pattern 2041 is a continuous broken line. Therefore, the second virtual electrode sub-pattern 2041 can be used as a trace for transmitting touch signals, while the patterns of other virtual electrodes are disconnected or continuous but floating.

[0050] The first virtual electrode pattern 202 includes a first virtual electrode sub-pattern 2021, and the second virtual electrode pattern 204 includes a second virtual electrode sub-pattern 2041. It can be understood that in this embodiment, a portion of the first virtual electrode pattern 202 and the second virtual electrode pattern 204, namely the first virtual sub-pattern and the second virtual sub-pattern, is used as a signal transmission line for the sensing electrode.

[0051] The embodiment of the present disclosure utilizes the first virtual electrode sub-pattern 2021 and the second virtual electrode sub-pattern 2041 as the routing for transmitting the touch drive signal, thereby eliminating the need to produce an additional routing layer and reducing one patterning process. In other words, the use of one mask plate is reduced, simplifying the production steps and also helping to reduce production costs.

[0052] In some embodiments, the touch module 100 further includes a first insulating layer OC0, a second insulating layer OC1, and a third insulating layer OC2. The first insulating layer OC0, the second electrode layer Metal1, the second insulating layer OC1, the first electrode layer Metal2, and the third insulating layer OC2 are stacked in sequence in a direction away from the substrate, and the orthographic projections of the first insulating layer OC0 and the third insulating layer OC2 on the substrate overlap.

[0053] like Figure 1As shown, in the technical solution of this embodiment, the first electrode layer Metal2 and the second electrode layer Metal1 of the touch module 100 are located between the first insulating layer OC0 and the third insulating layer OC2. Therefore, in the area corresponding to the first electrode layer Metal2 and the second electrode layer Metal1, the first insulating layer OC0 and the third insulating layer OC2 can both be made into a whole-surface insulating layer. In other words, in the area corresponding to the area corresponding to the first electrode layer Metal2 and the second electrode layer Metal1, the shapes of the first insulating layer OC0 and the third insulating layer OC2 are also the same, that is, the orthographic projections of the first insulating layer OC0 and the third insulating layer OC2 on the substrate coincide.

[0054] When manufacturing the first insulating layer OC0 and the third insulating layer OC2 , the same mask can be used for manufacturing, thereby reducing the use of an additional mask and helping to reduce production costs.

[0055] In some embodiments, the touch substrate includes a via hole 205 penetrating the second insulating layer OC1 .

[0056] like Figure 4 As shown, the orthographic projection of the via 205 on the substrate is located at the intersection of the orthographic projection of the first virtual electrode sub-pattern 2021 and the orthographic projection of the second virtual electrode pattern 2041 on the substrate, and the first virtual electrode sub-pattern 2021 and the second virtual electrode sub-pattern 2041 are electrically connected through the via 205.

[0057] In this embodiment, a via hole 205 is opened in the second insulating layer OC1 to achieve electrical connection between the first dummy electrode sub-pattern 2021 and the second dummy electrode sub-pattern 2041 .

[0058] In some embodiments, in the area outside the via hole 205 , the orthographic projection of the first virtual electrode sub-pattern 2021 on the substrate and the orthographic projection of the second virtual electrode sub-pattern 2041 on the substrate do not overlap.

[0059] In the technical solution of this embodiment, the second virtual electrode sub-pattern 2041 is not produced in the orthographic projection area of ​​the first virtual electrode sub-pattern 2021 on the substrate, and the orthographic projections of the first virtual electrode sub-pattern 2021 and the second virtual electrode sub-pattern 2041 on the substrate overlap only at the via 205.

[0060] In the related art, the second virtual electrode pattern 204 produced on the same layer as the second electrode layer Metal1 overlaps with the orthographic projection of the first electrode pattern on the base substrate, so a capacitor is formed between the second virtual electrode pattern 204 and the first electrode pattern, which may affect signal transmission.

[0061] Compared with the related art, the technical solution of this embodiment is equivalent to producing a portion of the second virtual electrode pattern 204 and the first electrode layer Metal2 at the same time, that is, the first virtual electrode sub-pattern 2021 in this embodiment. In this way, on the one hand, it can improve the contact effect between the first virtual electrode sub-pattern 2021 and the first channel pattern 201, and on the other hand, it also helps to reduce the mutual capacitance value between the first electrode layer Metal2 and the second electrode layer Metal1, thereby helping to reduce the possibility of local signal abnormalities.

[0062] In addition, the technical solution of this embodiment reduces the number of vias, which helps to reduce the possibility of signal anomalies.

[0063] like Figure 2 As shown, in the area corresponding to the via 205, the first electrode layer Metal2 includes a first channel pattern 201 and a first virtual electrode sub-pattern 2021. Therefore, in the area corresponding to the via 205, the mesh density of the first electrode layer Metal2 is greater than the mesh density of the area outside the via 205.

[0064] In some embodiments, the orthographic projection of the via 205 on the substrate is located at an overlapping position of the orthographic projection of the first virtual electrode sub-pattern 2021 on the substrate and the orthographic projection of the second virtual electrode pattern 204 on the substrate.

[0065] In this embodiment, a via hole 205 is provided in the second insulating layer OC1 at a position between the first virtual electrode sub-pattern 2021 and the second virtual electrode pattern 204. In this way, the first virtual electrode sub-pattern 2021 and the second virtual electrode pattern 204 can be electrically connected at the via hole 205, and the overlap of the orthographic projections of the first virtual electrode sub-pattern 2021 and the second virtual electrode pattern 204 on the substrate in areas other than the via hole 205 is reduced or avoided, thereby reducing the mutual capacitance value between the first electrode layer Metal2 and the second electrode layer Metal1.

[0066] In some embodiments, the routing width of the first electrode layer Metal2 in the area corresponding to the via 205 is greater than the routing width in the area outside the via 205; and / or the routing width of the second electrode layer Metal1 in the area corresponding to the via 205 is greater than the routing width in the area outside the via 205.

[0067] like Figures 5 to 8 As shown, in some embodiments, an expansion portion is formed in the via hole 205 region to improve the reliability of the electrical connection.

[0068] like Figure 5 As shown, in one embodiment, the second virtual electrode sub-pattern 2041 forms a first extension portion 20411. Figure 6As shown, in another embodiment, the first virtual electrode sub-pattern 2021 forms a second extended portion 20211. Figure 7 As shown, in another embodiment, the second virtual electrode sub-pattern 2041 forms the first outward expansion portion 20411 and the first virtual electrode sub-pattern 2021 forms the second outward expansion portion 20211 at the same time.

[0069] The outward expansion portion in this embodiment refers to increasing the local routing size by retaining more conductive material during the etching process to increase the routing width.

[0070] like Figure 8 As shown, in this embodiment, the provision of an extended portion helps improve the electrical contact between the first dummy electrode sub-pattern 2021 and the second dummy electrode sub-pattern 2041, thereby increasing the reliability of the connection between the first dummy electrode sub-pattern 2021 and the second dummy electrode sub-pattern 2041 and reducing the possibility of an open circuit. Furthermore, since the second dummy electrode sub-pattern 2041 is located at the edge of the touch substrate, a similar extended portion can also be provided to improve circuit connection reliability.

[0071] like Figure 2 and Figure 3 As shown, in some embodiments, the first virtual electrode pattern 202 further includes a third virtual electrode sub-pattern 2022 , and the second virtual electrode pattern 204 further includes a fourth virtual electrode sub-pattern 2042 .

[0072] The third virtual electrode sub-pattern 2022 refers to the portion of the first virtual electrode pattern 202 excluding the first virtual electrode sub-pattern 2021 , and the fourth virtual electrode sub-pattern 2042 refers to the portion of the second virtual electrode pattern 204 excluding the second virtual electrode sub-pattern 2041 .

[0073] The third virtual electrode sub-patterns 2022 and the second channel patterns 203 are alternately arranged, and the fourth virtual electrode sub-patterns 2042 and the first channel patterns 201 are alternately arranged.

[0074] like Figure 4 As shown, the alternating arrangement of the third virtual electrode sub-patterns 2022 and the second channel patterns 203 means that, except for the outermost positions, each third virtual electrode sub-pattern 2022 is located between two adjacent second channel patterns 203, and each second channel pattern 203 is located between two adjacent third virtual electrode sub-patterns 2022. Similarly, each fourth virtual electrode sub-pattern 2042 is located between two adjacent first channel patterns 201, and each first channel pattern 201 is located between two adjacent fourth virtual electrode sub-patterns 2042.

[0075] The overlapping range of the orthographic projection of the third virtual electrode sub-pattern 2022 and the orthographic projection of the fourth virtual electrode sub-pattern 2042 on the substrate should be as small as possible, which helps to further reduce the mutual capacitance between the first electrode layer Metal2 and the second electrode layer Metal1.

[0076] In some embodiments, the orthographic projection of the third virtual electrode sub-pattern 2022 on the substrate and the orthographic projection of the second channel pattern 203 on the substrate partially cross-overlap; and / or the orthographic projection of the fourth virtual electrode sub-pattern 2042 on the substrate and the orthographic projection of the first channel pattern 201 on the substrate partially cross-overlap.

[0077] By designing the third virtual electrode sub-pattern 2022 and the second channel pattern 203 to overlap in their orthographic projections on the substrate, as well as the fourth virtual electrode sub-pattern 2042 and the first channel pattern 201 to overlap in their orthographic projections on the substrate, the overall uniformity of the display panel can be improved, the possibility of moiré patterns can be reduced, and the display effect can be improved.

[0078] An embodiment of the present disclosure provides a touch display device, comprising any of the above touch substrates.

[0079] Specifically, such as Figure 1 As shown, the touch display device includes a substrate and a black matrix (BM), a touch module 100, an optical adhesive (OCA) and a display device which are sequentially stacked in a direction away from the substrate.

[0080] In this embodiment, the display device may be a liquid crystal display device (LCD), or an organic light emitting display device (OLED), etc., which is not further limited here.

[0081] The technical solution of this embodiment includes all the technical solutions of the above-mentioned touch substrate embodiment, and therefore, can at least achieve all the above-mentioned technical effects, which will not be described in detail here.

[0082] The above are only specific embodiments of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims.

Claims

1. A touch control substrate, comprising a substrate, and a first electrode layer and a second electrode layer stacked on the substrate, the first electrode layer comprising a first channel pattern and a first dummy electrode pattern, the first channel pattern being configured to transmit a touch detection signal, the second electrode layer comprising a second channel pattern and a second dummy electrode pattern, the first channel pattern and the second channel pattern being insulated from each other and intersecting, the second channel pattern being configured to receive the touch detection signal transmitted by the first channel pattern, and the second channel pattern being insulated from the second dummy electrode pattern; The first virtual electrode pattern includes a first virtual electrode sub-pattern, and the second virtual electrode pattern includes a second virtual electrode sub-pattern. The first virtual electrode sub-pattern is electrically connected to the first channel pattern and the second virtual electrode sub-pattern, respectively. The first virtual electrode sub-pattern and the second virtual electrode sub-pattern are used to transmit a touch detection signal to the first channel pattern. The touch control substrate includes a second insulating layer and a via hole penetrating the second insulating layer, the first virtual electrode sub-pattern and the second virtual electrode sub-pattern are electrically connected through the via hole, and a mesh density of the first electrode layer in an area corresponding to the via hole is greater than a mesh density in an area outside the via hole; In the via region, the first virtual electrode sub-pattern forms a second expansion portion, the wiring width of the second expansion portion is increased, and the second virtual electrode sub-pattern forms a first expansion portion, the wiring width of the first expansion portion is increased.

2. The touch substrate according to claim 1, wherein: It also includes a first insulating layer and a third insulating layer, wherein the first insulating layer, the second electrode layer, the second insulating layer, the first electrode layer and the third insulating layer are stacked in sequence.

3. The touch substrate according to claim 2, wherein: The orthographic projections of the first insulating layer and the third insulating layer on the substrate overlap.

4. The touch substrate according to claim 1, wherein: The orthographic projection of the via hole on the substrate is located at an overlapping position of the orthographic projection of the first virtual electrode sub-pattern on the substrate and the orthographic projection of the second virtual electrode sub-pattern on the substrate.

5. The touch substrate according to claim 1, wherein: In an area outside the via hole, an orthographic projection of the first virtual electrode sub-pattern on the substrate and an orthographic projection of the second virtual electrode sub-pattern on the substrate do not overlap.

6. The touch substrate according to claim 5, wherein: The first virtual electrode pattern further includes a third virtual electrode sub-pattern in addition to the first virtual electrode sub-pattern, and the second virtual electrode pattern further includes a fourth virtual electrode sub-pattern in addition to the second virtual electrode sub-pattern; The third virtual electrode sub-patterns and the second channel patterns are alternately arranged, and the fourth virtual electrode sub-patterns and the first channel patterns are alternately arranged.

7. The touch substrate according to claim 6, wherein: The orthographic projection of the third virtual electrode sub-pattern on the substrate and the orthographic projection of the second channel pattern on the substrate partially overlap; and / or The orthographic projection of the fourth virtual electrode sub-pattern on the substrate and the orthographic projection of the first channel pattern on the substrate partially cross and overlap.

8. The touch substrate according to claim 4, wherein: The routing width of the first electrode layer in the area corresponding to the via hole is greater than the routing width in the area outside the via hole; and / or The wiring width of the second electrode layer in the area corresponding to the via hole is greater than the wiring width in the area outside the via hole. 9 . A touch display device, comprising the touch substrate according to claim 1 .

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