Touch substrate, display panel and touch device

Abstract

The invention provides a touch substrate, a display panel and a touch device, and belongs to the technical field of touch. The touch substrate comprises a plurality of first touch electrodes and a plurality of second touch electrodes. The first touch electrode comprises a first main body part and a plurality of first branch parts; each first branch part is connected to the side surface of the first main body part and surrounds the first main body part; the first main body part is provided with a first opening penetrating in the thickness direction of the first main body part, at least one first branch part is provided with a second opening penetrating in the thickness direction of the first branch part, and first virtual electrodes are arranged in the first opening and the second opening; the second touch electrode comprises a second main body part and a plurality of second branch parts; each second branch part is connected to the side surface of the second main body part and surrounds the second main body part; the second main body part is provided with a third opening penetrating in the thickness direction, at least one second branch part is provided with a fourth opening penetrating in the thickness direction, and second virtual electrodes are arranged in the third opening and the fourth opening.

Description

Technical Field

[0001] The present disclosure belongs to the field of touch control technology, and particularly relates to a touch control substrate, a display panel and a touch control device. Background Art

[0002] The Flexible Multi-Layer On Cell (FMLOC) technology is to make the touch function layer after the display backplane packaging process is completed. However, in general touch devices, the total thickness of the upper film layer stack is relatively thin, which leads to an increase in the dielectric constant of the film layer, further causing an increase in the self-capacitance between the user's finger and the touch electrode, resulting in a decrease in low ground mass (LGM), affecting the touch performance of the product in a weak ground state. Summary of the invention

[0003] The present disclosure aims to solve at least one of the technical problems existing in the prior art and provides a touch substrate, a display panel and a touch device.

[0004] In a first aspect, the technical solution adopted to solve the technical problem of the present disclosure is a touch control substrate, characterized in that it includes a touch control function layer; the touch control function layer includes a first touch control layer and a second touch control layer, and a touch control insulating layer sandwiched between the first touch control layer and the second touch control layer;

[0005] The second touch control layer includes a plurality of first touch control electrodes and a plurality of second touch control electrodes;

[0006] The first touch electrode includes a first main body and a plurality of first branch parts; each of the first branch parts is connected to a side of the first main body and surrounds the first main body; the first main body has a first opening extending through the thickness direction thereof, and at least one of the first branch parts has a second opening extending through the thickness direction thereof, and a first virtual electrode is disposed in each of the first opening and the second opening, and the first virtual electrode is electrically insulated from the first main body and the first branch parts;

[0007] The second touch electrode includes a second main body and multiple second branch parts; each of the second branch parts is connected to the side of the second main body and surrounds the second main body; the second main body has a third opening passing through it along the thickness direction, and at least one of the second branch parts has a fourth opening passing through it along the thickness direction, and a second virtual electrode is arranged in the third opening and the fourth opening, and the second virtual electrode is electrically insulated from the second main body and the second branch parts.

[0008] In some embodiments, the first branch portion includes a first sub-branch and a second sub-branch, the first sub-branch is connected to a side of the first main body portion, and the second sub-branch is located at a side of a connection end between the first sub-branch and the first main body portion away from the first main body portion; and / or,

[0009] The second branch portion includes a third sub-branch and a fourth sub-branch, the third sub-branch is connected to the side of the second main body portion, and the fourth sub-branch is located on the side of the connection end of the third sub-branch and the second main body portion away from the second main body portion.

[0010] In some embodiments, the first main body has a polygonal outline; the length extension direction of the first sub-branch is the same as the length extension direction of the side of the first main body connected thereto; and / or,

[0011] The contour shape of the second main body is a polygon; the length extension direction of the third sub-branch is the same as the length extension direction of the side of the second main body connected thereto.

[0012] In some embodiments, the second opening passes through the first sub-branch; the length extension direction of the first virtual electrode located at the second opening is the same as the length extension direction of the first sub-branch; and / or,

[0013] The fourth opening passes through the third sub-branch; and a length extension direction of the second virtual electrode located at the fourth opening is the same as a length extension direction of the third sub-branch.

[0014] In some embodiments, the ratio of the maximum length of the first sub-branch in its length extension direction to the maximum length of the first main body in the length extension direction is in a range of 1:1 to 4:1; and / or,

[0015] A ratio of a maximum length of the third sub-branch in its length extension direction to a maximum length of the second main body portion in the length extension direction is in a range of 1:1 to 4:1.

[0016] In some embodiments, the second opening passes through the second sub-branch; the length extension direction of the first virtual electrode located at the second opening is the same as the length extension direction of the second sub-branch; and / or,

[0017] The fourth opening passes through the fourth sub-branch; and a length extension direction of the second virtual electrode located at the fourth opening is the same as a length extension direction of the fourth sub-branch.

[0018] In some embodiments, the second opening includes a first sub-opening and a second sub-opening, and the first sub-opening and the second sub-opening are connected, the first sub-opening passes through the first sub-branch, and the second sub-opening passes through the second sub-branch; the length extension direction of the first virtual electrode located in the second opening is the same as the length extension direction of the second sub-branch; and / or,

[0019] The fourth opening includes a third opening portion and a fourth sub-opening; the third sub-opening and the fourth sub-opening are connected, the third sub-opening passes through the third sub-branch, and the fourth sub-opening passes through the fourth sub-branch; the length extension direction of the second virtual electrode located at the fourth opening is the same as the length extension direction of the fourth sub-branch.

[0020] In some embodiments, the ratio of the maximum length of the second sub-branch in its length extension direction to the maximum length of the first main body in the length extension direction is in the range of 0.7:1 to 2:1; and / or,

[0021] A ratio of a maximum length of the fourth sub-branch in its length extension direction to a maximum length of the second main body portion in the length extension direction is in a range of 0.7:1 to 2:1.

[0022] In some embodiments, the angle formed by the intersection of the first sub-branch and the second sub-branch is the same as the angle formed by adjacent sides of the first main body; and / or,

[0023] The angle formed by the intersection of the third sub-branch and the fourth sub-branch is the same as the angle formed by adjacent sides of the second main body.

[0024] In some embodiments, in an extension direction of the first branch portion in which the connection end of the first branch portion and the first main body portion is away from the first main body portion, a maximum length of the first branch portion is greater than a maximum length of the first main body portion in the same extension direction;

[0025] In an extension direction of the second branch portion where a connecting end of the second branch portion and the second main body portion faces away from the second main body portion, a maximum length of the second branch portion is greater than a maximum length of the second main body portion in the same extension direction.

[0026] In some embodiments, the plurality of first touch electrodes are divided into M groups of first touch electrode groups arranged side by side in a row direction, and the plurality of second touch electrodes are divided into N groups of second touch electrode groups arranged side by side in a column direction, where M and N are both positive integers greater than or equal to 2;

[0027] For any of the first touch electrode groups, it includes a plurality of first touch electrodes arranged side by side in a column direction, and two adjacent first touch electrodes in the same column are electrically connected; for a plurality of first branches in any of the first touch electrodes, they are divided into a first sub-branch and a second sub-branch arranged opposite to each other in a row direction, and a third sub-branch and a fourth sub-branch arranged opposite to each other in a column direction;

[0028] For any second touch electrode group, it includes a plurality of second touch electrodes arranged side by side along the row direction, and two adjacent second touch electrodes in the same row are electrically connected; for a plurality of second branches in any second touch electrode, they are divided into a fifth sub-branch and a sixth sub-branch arranged opposite to each other along the row direction, and a seventh sub-branch and an eighth sub-branch arranged opposite to each other along the column direction;

[0029] For the first touch electrode in the jth row of the i-th group of the first touch electrode group, the first touch electrode in the jth row of the i+1-th group of the first touch electrode group, the second touch electrode in the i-th column of the j-th group of the second touch electrode group and the second touch electrode in the i-th column of the j+1-th group of the second touch electrode group, a third virtual electrode is provided in the accommodating portion enclosed by the second sub-branch portion corresponding to the j-th row of the i-th group, the first sub-branch portion corresponding to the j-th row of the i+1-th group, the eighth sub-branch portion corresponding to the i-th column of the j-th group of the second touch electrode and the seventh sub-branch portion corresponding to the i-th column of the j+1-th group of the second touch electrode; 1≤i≤M, 1≤j≤N, and i and j are both positive integers.

[0030] In some embodiments, a fourth virtual electrode is disposed between any two adjacent first branch portions and second branch portions.

[0031] In some embodiments, for any first touch electrode, a ratio between the first virtual electrode and the first touch electrode inside the first touch electrode is in a range of 30% to 70%; and / or,

[0032] For any second touch control electrode, the ratio of the second virtual electrode inside the second touch control electrode ranges from 30% to 70%.

[0033] In a second aspect, an embodiment of the present disclosure further provides a display panel, comprising a display substrate, a touch control substrate as described in any embodiment of the first aspect disposed on the display substrate, and a color filter layer disposed on a side of the touch control substrate away from the display substrate;

[0034] The color filter layer includes a black matrix and a plurality of color resist layers, the black matrix defines a plurality of black matrix openings, and one of the color resist layers is disposed in one of the black matrix openings;

[0035] The orthographic projection of the black matrix on the display substrate covers the orthographic projection of the touch function layer on the display substrate.

[0036] In some embodiments, the display panel further comprises a photosensitive device layer disposed on a side of the touch substrate away from the color filter layer, the photosensitive device layer comprising photosensitive devices arranged in an array; the black matrix has a plurality of photosensitive holes penetrating along the thickness direction thereof, the photosensitive devices and the photosensitive holes being disposed in one-to-one correspondence;

[0037] The first touch layer of the touch substrate includes a plurality of bridge structures; the bridge structures include a plurality of first surrounding portions and a first intermediate portion connecting different first surrounding portions; at least a portion of the plurality of first surrounding portions are electrically connected to two adjacent first touch electrodes through different first transfer holes;

[0038] The orthographic projection of the first surrounding portion on the display substrate surrounds the orthographic projection of the photosensitive hole on the display substrate.

[0039] In some embodiments, the orthographic projections of two first surrounding portions connected to the same first middle portion on the display substrate surround the orthographic projections of the photosensitive holes located in different columns on the display substrate.

[0040] In some embodiments, the bridge structure further includes a plurality of first overlapping portions, one of the first overlapping portions is connected to one of the first surrounding portions, and the first overlapping portion is electrically connected to the first touch electrode through a second transfer hole;

[0041] The plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along a row direction, each of the black matrix opening groups comprises a plurality of black matrix openings arranged side by side along a column direction, and the black matrix openings in adjacent black matrix opening groups are arranged in a staggered manner;

[0042] The orthographic projection of the first overlapping portion on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

[0043] In some embodiments, the first surrounding portion connected to the first overlapping portion includes a first overlapping section and a non-overlapping section electrically connected to the first touch electrode;

[0044] The first overlapping portion includes a plurality of second overlapping sections electrically connected to the first touch electrode, and the plurality of second overlapping sections are sequentially connected end to end to form a closed structure;

[0045] For the first surrounding portion and the first overlapping portion that are electrically connected to the same first touch electrode, the first overlapping section is shared by one of the plurality of second overlapping sections.

[0046] In some embodiments, the shortest distance between an edge of an orthographic projection of a non-overlapping segment of the first surrounding portion on the display substrate and an edge of an orthographic projection of the second touch layer on the display substrate is greater than 5.2 μm.

[0047] In some embodiments, the bridge structure includes two bridge branches, each of which includes a plurality of first surrounding portions and a first intermediate portion connecting different first surrounding portions;

[0048] The two bridge branches are symmetrically arranged about a symmetry axis that runs through the midpoints of the two bridge branches at the same positions along the column direction.

[0049] In some embodiments, the plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along the row direction, each of the black matrix opening groups includes a plurality of black matrix openings arranged side by side along the column direction, and the black matrix openings in adjacent black matrix opening groups along the row direction are staggered;

[0050] The first touch layer of the touch substrate includes a plurality of bridge structures; the bridge structures include a plurality of second surrounding portions and a second middle portion connecting different second surrounding portions; the plurality of second surrounding portions are electrically connected to two adjacent first touch electrodes through different third transfer holes respectively;

[0051] The orthographic projection of the second surrounding portion on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

[0052] In some embodiments, the second middle portion includes a first middle section and a second middle section, the first end of the first middle section and the first end of the second middle section are respectively connected to different second surrounding portions, the second end of the first middle section is connected to the second end of the second middle section, and the connection point and the first end of the first middle section are located in different areas where the black matrix opening groups are located.

[0053] In some embodiments, the bridge structure includes two bridge branches, each of which includes a plurality of second surrounding portions and a second intermediate portion connecting different second surrounding portions;

[0054] The two bridge branches are symmetrically arranged about a symmetry axis that runs through the midpoints of the two bridge branches at the same positions along the column direction.

[0055] In some embodiments, the display panel further comprises a photosensitive device layer disposed on a side of the touch substrate away from the color filter layer, the photosensitive device layer comprising photosensitive devices arranged in an array; the black matrix has a plurality of photosensitive holes penetrating along the thickness direction thereof, the photosensitive devices and the photosensitive holes being disposed in one-to-one correspondence;

[0056] The second touch layer of the touch substrate further comprises a plurality of connection structures; the connection structures comprise a plurality of third surrounding portions and a third middle portion connecting different third surrounding portions; the third middle portion is connected to the second touch electrode in the second touch layer;

[0057] The orthographic projection of the third surrounding portion on the display substrate at least surrounds a partial contour of the orthographic projection of the photosensitive hole on the display substrate.

[0058] In some embodiments, the orthographic projection of the third surrounding portion on the display substrate surrounds a partial contour of the orthographic projection of the photosensitive hole on the display substrate.

[0059] In some embodiments, the plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along a row direction, each of the black matrix opening groups includes a plurality of black matrix openings arranged side by side along a column direction, and the black matrix openings in adjacent black matrix opening groups are staggered;

[0060] Part of the third middle segment in the third middle portion is connected to part of the sub-line segments of the third surrounding portion to form a closed structure, and the orthographic projection of the closed structure on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

[0061] In a third aspect, the present disclosure also provides a touch control device, which includes a display panel as described in any embodiment of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1a This is a schematic diagram of some film thickness parameters in existing folding COE products;

[0063] Figure 1b A schematic diagram of some film thickness parameters in existing non-folding POL products;

[0064] Figure 2 A schematic diagram of the structure of a touch control substrate provided in an embodiment of the present disclosure;

[0065] Figure 3 A top view of a second touch layer provided in an embodiment of the present disclosure;

[0066] Figure 4a An enlarged schematic diagram of a first touch electrode provided in an embodiment of the present disclosure;

[0067] Figure 4b An enlarged schematic diagram of a second touch electrode provided in an embodiment of the present disclosure;

[0068] Figure 5aAn enlarged schematic diagram of another first touch electrode provided by an embodiment of the present disclosure;

[0069] Figure 5b An enlarged schematic diagram of another second touch electrode provided by an embodiment of the present disclosure;

[0070] Figure 6a An enlarged schematic diagram of another first touch electrode provided by an embodiment of the present disclosure;

[0071] Figure 6b An enlarged schematic diagram of another second touch electrode provided by an embodiment of the present disclosure;

[0072] Figure 7 A schematic diagram of a display panel provided in an embodiment of the present disclosure;

[0073] Figure 8 A top view of a stack of a first touch layer and a second touch layer located in a light sensing detection area provided in an embodiment of the present disclosure;

[0074] Fig. 9 A schematic diagram of a bridging structure provided in an embodiment of the present disclosure;

[0075] Fig.10 A top view of a stack of a first touch layer and a second touch layer located in a non-light sensing detection area provided in an embodiment of the present disclosure;

[0076] Fig.11 A schematic diagram of another bridging structure provided in an embodiment of the present disclosure;

[0077] Fig.12 for Figure 8 Schematic diagram of the connection structure.

[0078] The reference numerals are as follows: TSP, touch function layer; TMA, first touch layer; TMB, second touch layer; TLD, touch insulation layer; Tx, first touch electrode; 11, first main body; 12, first branch; 121, first sub-branch; 122, second sub-branch; 111, connection end of first sub-branch; 112, non-connection end of first sub-branch; dummy1, first virtual electrode; V1, first opening; V2, second opening; Rx, second touch electrode; 21, second main body; 22, second sub-branch branch; 221, third sub-branch; 222, fourth sub-branch; 211, connection end of the third sub-branch; 212, non-connection end of the third sub-branch; dummy2, second virtual electrode; V3, third opening; V4, fourth opening; 01, first touch electrode group; 02, first touch electrode group; X, row direction; Y, column direction; 03, black matrix opening group; 31, first sub-branch; 32, second sub-branch; 33, third sub-branch; 34, fourth sub-branch; 35, fifth sub-branch; 36, sixth sub-branch; 37, seventh sub-branch; 38, eighth sub-branch; 4, display substrate; 41, base substrate; PDL, pixel defining layer; 42, sub-pixel opening; 43, light-emitting layer; 44, electrode; CF, color filter layer; CF', color resist layer; BM, black matrix; 5, black matrix opening; 6, photosensitive hole; 7, bridge structure; 71, first surrounding part; 711, first overlapping section; 712, non-overlapping section; 72, first middle part; 721, first sub-middle part; 722, second sub-middle part; 73, first overlapping part; 731, second overlapping section; 74, second surrounding section; 75, second middle section; 741, sub-overlapping section; 751, first middle section; 752, second middle section; 7511, first sub-middle section; 7512, second sub-middle section; 7521, third sub-middle section; 7522, fourth sub-middle section; 8, connecting structure; 81, third surrounding section; 82, third middle section; 821, third middle section; 9, second encapsulation layer; 91, first inorganic encapsulation layer; 92, organic encapsulation layer; 93, second inorganic encapsulation layer. DETAILED DESCRIPTION

[0079] In order to make the purpose, technical scheme and advantages of the embodiments of the present disclosure clearer, the technical scheme in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The components of the embodiments of the present disclosure generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present disclosure provided in the drawings is not intended to limit the scope of the present disclosure for protection, but merely represents the selected embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present disclosure.

[0080] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one", "one" or "the" do not indicate quantity restrictions, but indicate that there is at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0081] The "multiple or several" mentioned in this disclosure refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0082] In related technologies, Color Filter On Encapsulation (COE) technology uses non-polarizer technology, filters and black matrix light absorption to reduce ambient light reflection and improve display contrast. FMLOC technology is combined with COE technology to prepare foldable touch COE products to provide display effects.

[0083] Figure 1a This is a schematic diagram of some film thickness parameters in existing folding COE products. Figure 1bSchematic diagram of some film thickness parameters in existing non-folding POL products. Figure 1a and Figure 1b As shown in the figure, the COE structure (i.e., the color film layer) is located between the touch function layer TSP and the stacked structure of each film layer. However, in order to match the foldable performance of the product, the stacked structure of each film layer on the COE upper layer cannot use a conventional glass cover, but a multi-layer flexible composite structure, such as Figure 1a The stacking structure of each film layer is shown in the figure. Due to the COE structure, the total thickness of the film layers stacked on the COE product is relatively thin. Figure 1a and Figure 1b From the data comparison, it can be seen that the total thickness of the film layers stacked above the touch function layer TSP of the COE product is reduced by about 500μm compared with the non-folding POL product. The reduction in the thickness of each film layer increases the dielectric constant of the film layer. Therefore, the self-capacitance between the finger and the touch electrode of the foldable touch COE product is increased compared with the non-folding POL product, which leads to a decrease in the weak grounding LGM, affecting the touch performance of the product in the weak grounding state.

[0084] In view of this, the embodiments of the present disclosure provide a touch substrate, which substantially eliminates the effects of increased self-capacitance and reduced LGM between the finger and the touch electrode caused by the thin film layer stacking thickness on the touch functional layer.

[0085] Figure 2 A schematic diagram of the structure of a touch control substrate provided in an embodiment of the present disclosure is shown in FIG. Figure 2 As shown, the touch substrate includes a buffer layer Buffer and a touch function layer TSP; the touch function layer TSP includes a first touch layer TMA and a second touch layer TMB, and a touch insulation layer TLD sandwiched between the first touch layer TMA and the second touch layer TMB.

[0086] Among them, the first touch layer TMA includes a bridge structure 7 for connecting touch electrodes. The second touch layer TMB is a metal mesh structure, including a touch drive electrode Tx for signal transmission, a touch sensing electrode Rx for signal reception, and a virtual electrode dummy without signal access. The bridge structure 7 can connect the two parts of the touch drive electrode Tx in the second touch layer TMB through a transfer hole, or connect the two parts of the touch sensing electrode Rx in the second touch layer TMB. In the actual working process, a stable coupling capacitance Cm (that is, mutual capacitance value) is formed between the touch drive electrode Tx and the touch sensing electrode Rx, and when the user's finger acts on the screen, the coupling capacitance Cm decreases, and the position touched by the finger is determined by detecting the change in the coupling capacitance △Cm.

[0087] Figure 3 A top view of the second touch layer provided in the embodiment of the present disclosure, such as Figure 3As shown, the second touch layer TMB includes a plurality of first touch electrodes and a plurality of second touch electrodes. Among them, one of the first touch electrodes and the second touch electrodes is a touch driving electrode Tx, and the other is a touch sensing electrode Rx. However, for ease of understanding, the embodiment of the present disclosure is described by taking the first touch electrode as the touch driving electrode Tx and the second touch electrode as the touch sensing electrode Rx as an example.

[0088] For example, Figure 3 As shown, the first touch electrode Tx and the second touch electrode Rx are electrically insulated from each other.

[0089] Figure 4a An enlarged schematic diagram of a first touch electrode provided in an embodiment of the present disclosure; Figure 4b An enlarged schematic diagram of a second touch electrode provided in an embodiment of the present disclosure.

[0090] like Figure 4a As shown, the first touch electrode Tx includes a first main body portion 11 and multiple first branch portions 12; each first branch portion 12 is connected to the side of the first main body portion 11 and surrounds the first main body portion 11; the first main body portion 11 has a first opening V1 passing through along its thickness direction, and at least one first branch portion 12 has a second opening V2 passing through along its thickness direction, and a first virtual electrode dummy1 is arranged in the first opening V1 and the second opening V2, and the first virtual electrode dummy1 is electrically insulated from the first main body portion 11 and the first branch portion 12.

[0091] For example, Figure 4a As shown, each first branch portion 12 has a second opening V2 penetrating along the thickness direction thereof, so a first dummy electrode dummy1 is disposed in each first branch portion 12 .

[0092] For example, for the first touch electrode Tx, the shape of the first main body portion 11 is different, and the positions and quantities of the first branch portions 12 surrounding the first main body portion 11 are different. Figure 4a As shown, taking the outline shape of the first main body 11 as a rectangle as an example, the first main body 11 includes four side surfaces, each of which is provided with a first branch portion 12, that is, four first branch portions 12 are located on different sides of the first main body 11 and surround the first main body 11.

[0093] Of course, the pattern shape of the first main body 11 can also be circular. In this case, the first branch portions 12 can be evenly distributed on the cylindrical side of the first main body 11. For example, four first main bodies 11 can be evenly distributed, or six first main bodies 11 can be evenly distributed, or eight first main bodies 11 can be evenly distributed. This disclosure will not list them one by one. The following description will take the pattern shape of the first main body 11 as a rectangle as an example.

[0094] Exemplarily, the pattern shape of the first main body 11 is the same as the pattern shape of the first dummy electrode dummy1 located in the first opening V1 , and the geometric centers of the two patterns are the same.

[0095] For example, Figure 4a As shown, the first dummy electrode dummy1 located in the first opening V1 is proportionally smaller than the first main body 11 .

[0096] For example, Figure 4a As shown, the first branch portions 12 located on two opposite sides of the first main portion 11 have the same pattern shape.

[0097] For example, Figure 4a As shown, the first branch portions 12 located at two opposite sides of the first main body portion 11 have the same pattern shape of the first dummy electrodes dummy1 inside the first branch portions 12 .

[0098] like Figure 4b As shown, the second touch electrode Rx includes a second main body portion 21 and multiple second branch portions 22; each second branch portion 22 is connected to the side of the second main body portion 21 and surrounds the second main body portion 21; the second main body portion 21 has a third opening V3 passing through it along the thickness direction, and at least one second branch portion 22 has a fourth opening V4 passing through it along the thickness direction, and the third opening V3 and the fourth opening V4 are both provided with a second virtual electrode dummy2, and the second virtual electrode dummy2 is electrically insulated from the second main body portion 21 and the second branch portion 22.

[0099] For example, Figure 4b As shown, each second branch portion 22 has a third opening V3 penetrating along the thickness direction thereof, so a second dummy electrode dummy2 is disposed in each second branch portion 22 .

[0100] For example, for the second touch electrode Rx, the second main body 21 has a different shape, and the first branch portions 12 surrounding the first main body 11 have different positions and different numbers. Figure 4b As shown, taking the second main body 21 having a rectangular outline as an example, the second main body 21 includes four side surfaces, each of which is provided with a second branch portion 22, that is, four second branch portions 22 are located on different sides of the second main body 21 and surround the second main body 21.

[0101] Of course, the contour shape of the orthographic projection of the second main body 21 can also be a circle. In this case, the second branch portions 22 can be evenly distributed on the cylindrical side of the second main body 21. For example, four second main bodies 21 can be evenly distributed, or six second main bodies 21 can be evenly distributed, or eight second main bodies 21 can be evenly distributed. This disclosure will not list them one by one. The following is an example in which the contour shape of the orthographic projection of the second main body 21 is a rectangle.

[0102] For example, Figure 4b As shown, the pattern shape of the second main body 21 is the same as the pattern shape of the second dummy electrode dummy2 located in the third opening V3, and the geometric centers of the two patterns are the same.

[0103] For example, Figure 4b As shown, the second dummy electrode dummy2 located in the third opening V3 is proportionally smaller than the second main body 21 .

[0104] For example, Figure 4b As shown, the second branch portions 22 located on two opposite sides of the second main body portion 21 have the same pattern shape.

[0105] For example, Figure 4b As shown, the second branch portions 22 located at two opposite sides of the second main body portion 21 have the same pattern shape of the second dummy electrodes dummy2 inside.

[0106] For example, Figure 4a As shown, for the same first touch electrode Tx, there is a certain gap between different first branch portions 12. Figure 3 As shown, for different first touch electrodes Tx, there is also a certain gap between adjacent first branch portions 12. Figure 4b As shown, for the same second touch electrode Rx, there is a certain gap between different second branch portions 22. Figure 3 As shown, for different second touch electrodes Rx, there is also a certain gap between adjacent second branch portions 22 .

[0107] For example, Figure 3 As shown, for the same first touch electrode Tx, the minimum gap H between two adjacent first branch portions 12 in the direction surrounding the first main body portion 11 is greater than the minimum width of the second branch portion 22. For the same second touch electrode Rx, the minimum gap between two adjacent second branch portions 22 in the direction surrounding the second main body portion 21 is greater than the minimum width of the first branch portion 12.

[0108] For example, Figure 3As shown, for the same first touch electrode Tx, a partial structure of the second branch portion 22 is sandwiched between two adjacent first branch portions 12 along the direction surrounding the first main body portion 11 .

[0109] For example, Figure 3 As shown, the patterns of the first touch electrode Tx and the second touch electrode Rx are exactly the same, and under the premise that the patterns of the first touch electrode Tx and the second touch electrode Rx are electrically insulated, the patterns of the first touch electrode Tx and the second touch electrode Rx can be spliced ​​together to form a grid-shaped second touch layer TMB.

[0110] The first touch electrode Tx and the second touch electrode Rx in the second touch layer TMB provided by the present disclosure are both provided with virtual electrodes (i.e., the first virtual electrode dummy1 and the second virtual electrode dummy2) in both their main bodies (i.e., the first main body 11 and the second main body 21) and their branch bodies (i.e., the first branch 12 and the second branch 22). While ensuring the touch sensitivity, the first opening V1 is opened to the maximum extent inside the first main body 11, and the third opening V3 is opened to the maximum extent inside the second main body 21, so that the first virtual electrode dummy1 is filled in the first opening V1, and the second virtual electrode dummy2 is filled in the third opening V3; at the same time, the second opening V2 is opened inside the first branch portion 12, and the fourth opening V4 is opened inside the second branch portion 22, so that the first virtual electrode dummy1 is filled in the second opening V2, and the second virtual electrode dummy2 is filled in the fourth opening V4, which can minimize the areas of the first touch electrode Tx and the second touch electrode Rx, thereby reducing the self-capacitance values ​​formed between the first touch electrode Tx and the second touch electrode Rx and the fingers respectively, thereby improving LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0111] In some embodiments, Figure 4a As shown, the first branch portion 12 includes a first sub-branch 121 and a second sub-branch 122. The first sub-branch 121 is connected to the side of the first main body portion 11, and the second sub-branch 122 is located at the side of the connection end between the first sub-branch 121 and the first main body portion 11 away from the first main body portion 11. Figure 4b As shown, the second branch portion 22 includes a third sub-branch 221 and a fourth sub-branch 222. The third sub-branch 221 is connected to the side of the second main body portion 21, and the fourth sub-branch 222 is located on the side of the connection end of the third sub-branch 221 and the second main body portion 21 away from the second main body portion 21.

[0112] For example, Figure 4aAs shown, the first sub-branch 121 includes a connection end 111 connected to the first main body 11 and a non-connection end 112 not connected to the first main body 11. For the same first branch portion 12, the orthographic projection of the second sub-branch 122 on the side surface where the first main body 11 and the first sub-branch 121 are connected does not overlap with the orthographic projection of the non-connection end 112 of the first sub-branch 121 on the extended surface of the side surface where the first main body 11 and the first sub-branch 121 are connected.

[0113] For example, Figure 4b As shown, the third sub-branch 221 includes a connection end 211 connected to the second main body 21 and a non-connection end 212 not connected to the second main body 21. For the same second branch portion 22, the orthographic projection of the fourth sub-branch 222 on the side surface where the second main body 21 and the third sub-branch 221 are connected does not overlap with the orthographic projection of the non-connection end 212 of the third sub-branch 221 on the extended surface of the side surface where the second main body 21 and the third sub-branch 221 are connected.

[0114] For example, Figure 4a As shown, for the same first touch electrode Tx, a fourth sub-branch 222 is sandwiched between two adjacent first sub-branches 121 in the circumferential direction. And / or, and Figure 4b As shown, for the same second touch electrode Rx, a second sub-branch 122 is sandwiched between two adjacent third sub-branches 221 in the circumferential direction.

[0115] For example, Figure 4a As shown, the first sub-branches 121 located on the two opposite sides of the first main body 11 have the same pattern. And / or, as Figure 4b As shown, the third sub-branches 221 located on two opposite sides of the second main body 21 have the same pattern.

[0116] For example, Figure 4a As shown, the second sub-branches 122 located on the two opposite sides of the first main body 11 have the same pattern. And / or, Figure 4b As shown, the fourth sub-branches 222 located on two opposite sides of the second main body 21 have the same pattern.

[0117] The patterns of the first sub-branch 121 and the second sub-branch 122 and the patterns of the third sub-branch 221 and the fourth sub-branch 222 provided in the embodiment of the present disclosure can ensure the stability of the mutual capacitance between the first touch electrode Tx and the second touch electrode Rx, thereby ensuring the stability of the touch sensitivity.

[0118] In some embodiments, Figure 4aAs shown, the outline shape of the first main body 11 is a polygon; the length extension direction of the first sub-branch 121 is the same as the length extension direction of the side of the first main body 11 connected thereto; and / or Figure 4b As shown, the outline shape of the second main body portion 21 is a polygon; the length extension direction of the third sub-branch 221 is the same as the length extension direction of the side of the second main body portion 21 connected thereto.

[0119] For example, Figure 4a As shown, the pattern of the first sub-branch 121 is an irregular polygon, for example, the non-connected end of the first sub-branch 121 includes a plurality of recessed portions and protruding portions. And / or, as Figure 4b As shown, the pattern of the third sub-branch 221 is an irregular polygon, for example, the non-connected end of the third sub-branch 221 includes a plurality of recessed portions and protruding portions.

[0120] The pattern of the first sub-branch 121 and the pattern of the third sub-branch 221 provided in the embodiment of the present disclosure can ensure the stability of the mutual capacitance between the first touch electrode Tx and the second touch electrode Rx, thereby ensuring the stability of the touch sensitivity.

[0121] In some embodiments, Figure 4a As shown, the second opening V2 passes through the first sub-branch 121; the length extension direction of the first virtual electrode dummy1 located at the second opening V2 is the same as the length extension direction of the first sub-branch 121; and / or Figure 4b As shown, the fourth opening V4 passes through the third sub-branch 221 ; the length extension direction of the second dummy electrode dummy2 located at the fourth opening V4 is the same as the length extension direction of the third sub-branch 221 .

[0122] Exemplarily, for some of the first sub-branches 121 in the plurality of first sub-branches 121 in the first touch electrode Tx, the pattern of the first dummy electrode dummy1 located in the second opening V2 is the same as the pattern of the first sub-branch 121. And / or, for some of the third sub-branches 221 in the plurality of third sub-branches 221 in the second touch electrode Rx, the pattern of the second dummy electrode dummy2 located in the fourth opening V4 is the same as the pattern of the third sub-branch 221.

[0123] For example, Figure 4a As shown, the first dummy electrodes dummy1 in the first sub-branches 121 on the two opposite sides of the first main body 11 have the same pattern. And / or, Figure 4b As shown, the second dummy electrodes dummy2 in the third sub-branches 221 located on two opposite sides of the second main body 21 have the same pattern.

[0124] Exemplarily, the pattern shape of the first dummy electrode dummy1 includes, for example, a quadrilateral, a hexagon, or an octagon.

[0125] Exemplarily, the pattern shape of the second dummy electrode dummy2 includes, for example, a quadrilateral, a hexagon, or an octagon.

[0126] The pattern of the first virtual electrode dummy1 and the pattern of the second virtual electrode dummy2 provided in the embodiment of the present disclosure can increase the area of ​​the first virtual electrode dummy1 in a single first touch electrode Tx and / or second touch electrode Rx, thereby reducing the self-capacitance value between the finger and the first touch electrode Tx, and / or the self-capacitance value between the finger and the second touch electrode Rx, thereby improving LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0127] In some embodiments, Figure 4a As shown, in the extension direction P1 of the first branch portion 12 where the connecting end of the first branch portion 12 and the first main body portion 11 is away from the first main body portion 11 , the maximum length of the first branch portion 12 is greater than the maximum length of the first main body portion 11 in the same extension direction P1 .

[0128] like Figure 4b As shown, in the extension direction P2 of the second branch portion 22 where the connecting end of the second branch portion 22 and the second main body portion 21 is away from the second main body portion 21 , the maximum length of the second branch portion 22 is greater than the maximum length of the second main body portion 21 in the same extension direction P2 .

[0129] In some embodiments, the ratio of the maximum length of the first sub-branch 121 in its length extension direction to the maximum length of the first main body 11 in this length extension direction is in the range of 1:1 to 4:1; and / or the ratio of the maximum length of the third sub-branch 221 in its length extension direction to the maximum length of the second main body 21 in this length extension direction is in the range of 1:1 to 4:1.

[0130] Exemplarily, the ratio of the maximum length of the first sub-branch 121 in the length direction to the maximum length of the first main body 11 in the length extension direction is X1. Alternatively, the ratio of the maximum length of the first sub-branch 121 in the length direction to the maximum length of the first main body 11 in the length extension direction is X2. Alternatively, the ratio of the maximum length of the first sub-branch 121 in the length direction to the maximum length of the first main body 11 in the length extension direction is X3.

[0131] Exemplarily, the ratio of the maximum length of the third sub-branch 221 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X4. Alternatively, the ratio of the maximum length of the third sub-branch 221 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X5. Alternatively, the ratio of the maximum length of the third sub-branch 221 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X6.

[0132] In some embodiments, Figure 5a This is another enlarged schematic diagram of a first touch electrode provided in an embodiment of the present disclosure, Figure 5b is an enlarged schematic diagram of another second touch electrode provided in an embodiment of the present disclosure, and Figure 4a and Figure 4b The difference between the touch electrodes shown is that a first dummy electrode dummy1 is also disposed inside the second sub-branch 122 , and a second dummy electrode dummy2 is also disposed inside the fourth sub-branch 222 .

[0133] like Figure 5a As shown, the second opening V2 passes through the second sub-branch 122; the length extension direction of the first virtual electrode dummy1 located in the second opening V2 is the same as the length extension direction of the second sub-branch 122; and / or Figure 5b As shown, the fourth opening V4 passes through the fourth sub-branch 222 ; the length extension direction of the second dummy electrode dummy2 located at the fourth opening V4 is the same as the length extension direction of the fourth sub-branch 222 .

[0134] For example, Figure 5a As shown, for some of the second sub-branches 122 in the plurality of second sub-branches 122 in the first touch electrode Tx, the pattern of the first dummy electrode dummy1 located in the second opening V2 is the same as the pattern of the first sub-branch 121. And / or, Figure 5b As shown, for some of the fourth sub-branches 222 in the plurality of fourth sub-branches 222 in the second touch electrode Rx, the pattern of the second dummy electrode dummy2 located in the fourth opening V4 is the same as the pattern of the fourth sub-branch 222 .

[0135] For example, Figure 5a As shown, the first dummy electrodes dummy1 in the second sub-branches 122 located on the two opposite sides of the first main body 11 have the same pattern. And / or, Figure 5b As shown, the second dummy electrodes dummy2 in the fourth sub-branches 222 located on two opposite sides of the second main body 21 have the same pattern.

[0136] Exemplarily, the pattern shape of the first dummy electrode dummy1 includes, for example, a quadrilateral, a hexagon, or an octagon.

[0137] Exemplarily, the pattern shape of the second dummy electrode dummy2 includes, for example, a quadrilateral, a hexagon, or an octagon.

[0138] Embodiments of the present disclosure Figure 5a and Figure 5b The provided pattern of the first virtual electrode dummy1 and the pattern of the second virtual electrode dummy2 further increase the area of ​​the first virtual electrode dummy1 in a single first touch electrode Tx and / or second touch electrode Rx compared to FIG4 , thereby further reducing the self-capacitance value between the finger and the first touch electrode Tx, and / or the self-capacitance value between the finger and the second touch electrode Rx, thereby improving LGM.

[0139] In some embodiments, Figure 6a is an enlarged schematic diagram of another first touch electrode provided in an embodiment of the present disclosure, and Figure 5a The difference of the first touch electrode shown is that the first dummy electrode dummy1 located inside the second sub-branch 122 and a part of the first dummy electrode dummy1 located inside the first sub-branch 121 are connected to form an integrated structure. Figure 6b is an enlarged schematic diagram of another second touch electrode provided in an embodiment of the present disclosure, and Figure 5b The difference between the touch electrodes shown is that the second dummy electrode dummy2 located inside the fourth sub-branch 222 and a part of the second dummy electrode dummy2 located inside the third sub-branch 221 are connected to form an integrated structure.

[0140] like Figure 6a As shown, the second opening V2 includes a first sub-opening V21 and a second sub-opening V22, and the first sub-opening V21 and the second sub-opening V22 are connected, the first sub-opening V21 passes through the first sub-branch 121, and the second sub-opening V22 passes through the second sub-branch 122; the length extension direction of the first virtual electrode V2 located in the second opening V2 is the same as the length extension direction of the second sub-branch 122; and / or, Figure 6b As shown, the fourth opening V4 includes a third opening portion V41 and a fourth sub-opening V42; and the third sub-opening V41 and the fourth sub-opening V42 are connected, the third sub-opening V41 passes through the third sub-branch 221, and the fourth sub-opening V42 passes through the fourth sub-branch 222; the length extension direction of the second virtual electrode dummy2 located in the fourth opening V4 is the same as the length extension direction of the fourth sub-branch 222.

[0141] Embodiments of the present disclosure Figure 6a and Figure 6bThe pattern of the first virtual electrode dummy1 and the pattern of the second virtual electrode dummy2 are compared. Figure 5a and Figure 5b The area of ​​the first virtual electrode dummy1 in a single first touch electrode Tx and / or second touch electrode Rx is further increased, thereby further reducing the self-capacitance between the finger and the first touch electrode Tx and / or the self-capacitance between the finger and the second touch electrode Rx, thereby improving LGM.

[0142] In some embodiments, the ratio of the maximum length of the second sub-branch 122 in its length extension direction to the maximum length of the first main body 11 in this length extension direction is in the range of 0.7:1 to 2:1; and / or the ratio of the maximum length of the fourth sub-branch 222 in its length extension direction to the maximum length of the second main body 21 in this length extension direction is in the range of 0.7:1 to 2:1.

[0143] Exemplarily, the ratio of the maximum length of the second sub-branch 122 in the length direction to the maximum length of the first main body 11 in the length extension direction is X1. Alternatively, the ratio of the maximum length of the second sub-branch 122 in the length direction to the maximum length of the first main body 11 in the length extension direction is X2. Alternatively, the ratio of the maximum length of the second sub-branch 122 in the length direction to the maximum length of the first main body 11 in the length extension direction is X3.

[0144] Exemplarily, the ratio of the maximum length of the fourth sub-branch 222 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X4. Alternatively, the ratio of the maximum length of the fourth sub-branch 222 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X5. Alternatively, the ratio of the maximum length of the fourth sub-branch 222 in the direction of its length extension to the maximum length of the second main body 21 in the direction of its length extension is in the range of X6.

[0145] In some embodiments, Figure 4a , Figure 5a or Figure 6a As shown, the angle formed by the intersection of the first sub-branch 121 and the second sub-branch 122 is the same as the angle formed by the adjacent sides of the first main body 11; and / or Figure 4b , Figure 5b or Figure 6b As shown, the angle formed by the intersection of the third sub-branch 221 and the fourth sub-branch 222 is the same as the angle formed by the adjacent sides of the second main body 21 .

[0146] For example, Figure 4a , Figure 5a or Figure 6a As shown, when the pattern shape of the first main body 11 is a rectangle, the angle between the adjacent two sides of the first main body 11 is 90°. Therefore, the angle formed by the intersection of the first sub-branch 121 and the second sub-branch 122 is also 90°.

[0147] For example, Figure 4b , Figure 5b or Figure 6b As shown, when the second main body 21 is in a rectangular shape, the angle between the adjacent two sides of the second main body 21 is 90°. Therefore, the angle formed by the intersection of the third sub-branch 221 and the fourth sub-branch 222 is also 90°.

[0148] For example, Figure 4a , Figure 5a or Figure 6a As shown, the opening defined by the intersection of the first sub-branch 121 and the second sub-branch 122 faces away from the first main body portion 11 .

[0149] For example, Figure 4b , Figure 5b or Figure 6b As shown, the opening defined by the intersection of the third sub-branch 221 and the fourth sub-branch 222 faces away from the second main body portion 21 .

[0150] In this embodiment, the opening formed by the intersection of the first sub-branch 121 and the second sub-branch 122, and the opening formed by the intersection of the third sub-branch 221 and the fourth sub-branch 222 can effectively increase the interaction between the first touch electrode Tx and the second touch electrode Rx, thereby improving the mutual capacitance Cm and the capacitance change △Cm, thereby ensuring the touch sensitivity.

[0151] In some embodiments, Figure 3 As shown, the plurality of first touch electrodes Tx are divided into M groups of first touch electrode groups 01 arranged side by side along the row direction X, and the plurality of second touch electrodes Rx are divided into N groups of second touch electrode groups 02 arranged side by side along the column direction Y, where M and N are both positive integers greater than or equal to 2.

[0152] Continue as Figure 3 As shown, for any first touch electrode group 01, it includes a plurality of first touch electrodes Tx arranged side by side along the column direction Y, and two adjacent first touch electrodes Tx in the same column are electrically connected; for a plurality of first branches 12 in any first touch electrode Tx, it is divided into a first sub-branch 31 and a second sub-branch 32 arranged relatively along the row direction X, and a third sub-branch 33 and a fourth sub-branch 34 arranged relatively along the column direction Y.

[0153] It should be noted that the first sub-branch portion 31 , the second sub-branch portion 32 , the third sub-branch portion 33 and the fourth sub-branch portion 34 all include a first sub-branch 121 and a second sub-branch 122 .

[0154] Continue as Figure 3 As shown, for any second touch electrode group 02, it includes a plurality of second touch electrodes Rx arranged side by side along the row direction X, and two adjacent second touch electrodes Rx in the same row are electrically connected; for a plurality of second branches 22 in any second touch electrode Rx, it is divided into a fifth sub-branch 35 and a sixth sub-branch 36 arranged relatively along the row direction X, and a seventh sub-branch 37 and an eighth sub-branch 38 arranged relatively along the column direction Y.

[0155] It should be noted that the fifth sub-branch 35 , the sixth sub-branch 36 , the seventh sub-branch 37 and the eighth sub-branch 38 all include a third sub-branch 221 and a fourth sub-branch 222 .

[0156] Continue as Figure 3 As shown, for the j-th row first touch electrode Tx in the i-th group of first touch electrode group 01, the j-th row first touch electrode Tx in the i+1-th group of first touch electrode group 01, the i-th column second touch electrode Rx in the j-th group of second touch electrode group 02 and the i-th column second touch electrode Rx in the j+1-th group of second touch electrode group 02, the accommodating portion surrounded by the second sub-branch portion 32 corresponding to the j-th row first touch electrode Tx in the i-th group, the first sub-branch portion 31 corresponding to the j-th row first touch electrode Tx in the i+1-th group, the eighth sub-branch portion 38 corresponding to the i-th column second touch electrode Rx in the j-th group and the seventh sub-branch portion 37 corresponding to the i-th column second touch electrode Rx in the j+1-th group is provided with a third virtual electrode dummy3; 1≤i≤M, 1≤j≤N, and i and j are both positive integers.

[0157] Exemplarily, the pattern shape of the third dummy electrode dummy3 is the same as the pattern shape of the accommodation portion.

[0158] For example, Figure 3 As shown, the intersection O of a line connecting the geometric center of the pattern of the first main body 11 corresponding to the j-th row of the first touch electrode Tx of the i-th group and the geometric center of the pattern of the first main body 11 corresponding to the j-th row of the first touch electrode Tx of the i+1-th group, and a line connecting the geometric center of the pattern of the second main body 21 corresponding to the i-th column of the second touch electrode Rx of the j-th group and the geometric center of the pattern of the second main body 21 corresponding to the i-th column of the second touch electrode Rx of the j+1-th group, is the geometric center of the pattern of the third virtual electrode dummy3.

[0159] Exemplarily, the third dummy electrode dummy3 is electrically insulated from all the surrounding sub-branches.

[0160] In this embodiment, a third virtual electrode dummy3 is disposed between adjacent first touch electrodes Tx in the row direction X or adjacent second touch electrodes Rx in the column direction Y, so as to increase the area of ​​the virtual electrode in the second touch layer TMB, thereby reducing the self-capacitance between the finger and the first touch electrode Tx and the second touch electrode Rx, and increasing LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0161] In some embodiments, Figure 3 As shown, a fourth dummy electrode dummy4 is disposed between any two adjacent first branch portions 12 and second branch portions 22 .

[0162] For example, Figure 3 As shown, the fourth dummy electrode dummy4 surrounds a portion of the side surface of the first branch portion 12 in the first touch electrode Tx.

[0163] For example, Figure 3 As shown, the fourth dummy electrode dummy4 surrounds a portion of the side surface of the second branch portion 22 in the second touch electrode Rx.

[0164] Exemplarily, the fourth dummy electrode dummy4 is electrically insulated from the first branch portion 12 and the second branch portion 22 adjacent thereto.

[0165] In this embodiment, a fourth virtual electrode dummy4 is arranged between the adjacent first branch portions 12 and the second branch portions 22, and the fourth virtual electrode dummy4 surrounds a portion of the side surface of the first branch portion 12 in the first touch electrode Tx, further increasing the area of ​​the virtual electrode in the second touch layer TMB, thereby reducing the self-capacitance value between the finger and the first touch electrode Tx and the second touch electrode Rx, and increasing LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0166] In some embodiments, the pattern of the first touch electrode Tx, the pattern of the second touch electrode Rx and the pattern of the dummy electrode are formed by any one of the above embodiments or a combination of multiple embodiments. For any first touch electrode Tx, the ratio between the first dummy electrode dummy1 inside it and the first touch electrode Tx ranges from 30% to 70%; and / or, for any second touch electrode Rx, the ratio between the second dummy electrode dummy2 inside it and the second touch electrode Rx ranges from 30% to 70%.

[0167] Exemplarily, for any first touch control electrode Tx, the ratio between the first dummy electrode dummy1 inside the first touch control electrode Tx is 30%, 50% or 70%.

[0168] Exemplarily, for any second touch control electrode Rx, the ratio between the second dummy electrode dummy2 inside the second touch control electrode Rx is 30%, 50% or 70%.

[0169] In this embodiment, any one of the above embodiments or a combination of multiple embodiments is adopted, so that the area ratio of the first virtual electrode dummy1 to the first touch electrode Tx is greater than 30%, and the area ratio of the second virtual electrode dummy2 to the second touch electrode Rx is greater than 30%. It can effectively reduce the self-capacitance between the finger and the first touch electrode Tx, and the self-capacitance between the finger and the second touch electrode Rx without affecting the touch sensitivity, thereby improving LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0170] In addition, the embodiments of the present disclosure also provide a display panel, such as a display panel with a foldable COE structure. In the related art, due to the influence of the COE structure, the total thickness of the stacked film layers above the COE product is relatively thin, and the reduction in the thickness of each film layer increases the dielectric constant of the film layer. Therefore, the self-capacitance between the finger and the touch electrode of the foldable touch COE product is increased compared to the non-folding POL product, which leads to a decrease in the weak grounding LGM, affecting the touch performance of the product in the weak grounding state.

[0171] In view of this, the present disclosure improves the touch function layer TSP in the display panel of the COE structure, adjusts the setting position and pattern of the virtual electrodes inside it, increases the proportion of the first virtual electrode dummy1 inside the first touch electrode Tx and / or the proportion of the second virtual electrode dummy2 inside the second touch electrode Rx, thereby effectively reducing the self-capacitance between the finger and the touch electrode, and improving LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0172] Figure 7 A schematic diagram of a display panel provided in an embodiment of the present disclosure is shown in FIG. Figure 7 As shown, it includes a display substrate 4, a touch control substrate as in any of the above embodiments arranged on the display substrate 4, and a color filter layer CF arranged on a side of the touch control substrate away from the display substrate 4.

[0173] For example, Figure 7 As shown, the display substrate 4 includes a base substrate 41 and a pixel defining layer PDL disposed on the base substrate 41, the pixel defining layer PDL has a plurality of sub-pixel openings 42, and light-emitting devices of different colors are disposed correspondingly to different sub-pixel openings 42. For example, a red light-emitting device R, a green light-emitting device G, and a blue light-emitting device B. The light-emitting device includes at least a light-emitting layer 43 and an electrode 44.

[0174] Exemplarily, the substrate 41 includes a pixel driving circuit ( Figure 7 The pixel driving circuit is electrically connected to the electrode 44 to drive the light emitting layer 43 to emit light.

[0175] For example, Figure 7 As shown, the display substrate 4 further includes a first encapsulation layer 45 disposed on a side of the pixel defining layer PDL away from the base substrate 41 , and the first encapsulation layer 45 is used to encapsulate the light emitting device.

[0176] Continue as Figure 7 As shown, the color filter layer CF includes a black matrix BM and multiple color resist layers CF', the black matrix BM defines multiple black matrix openings 5, and one color resist layer CF' is arranged in one black matrix opening 5; the orthographic projection of the black matrix BM on the display substrate 4 covers the orthographic projection of the touch function layer TSP on the display substrate 4.

[0177] Exemplarily, the color-resistance layer CF' is arranged in one-to-one correspondence with light-emitting devices of different colors. For example, a red light-emitting device corresponds to a red color-resistance layer CF'_R, which transmits red light and filters light of other colors except red light; a green light-emitting device corresponds to a green color-resistance layer CF'_G, which transmits green light and filters light of other colors except green light; a blue light-emitting device corresponds to a blue color-resistance layer CF'_B, which transmits blue light and filters light of other colors except blue light.

[0178] For example, Figure 7 As shown, the outline of the orthographic projection of the black matrix opening 5 on the base substrate 41 completely covers the outline of the orthographic projection of the sub-pixel opening 42 on the base substrate 41. In other words, the orthographic projection of the color resist layer CF' located at the black matrix opening 5 on the base substrate 41 completely covers the orthographic projection of the light-emitting device located at the sub-pixel opening 42.

[0179] For example, Figure 7 As shown, the orthographic projection of the black matrix BM on the base substrate 41 completely falls within the orthographic projection of the pixel defining layer PDL on the base substrate 41 .

[0180] The second touch layer TMB is a metal grid structure, and the metal grid structure completely avoids the black matrix opening 5. Therefore, the orthographic projection of the second touch layer TMB on the display substrate 4 does not overlap with the orthographic projection of the color resist layer CF' on the display substrate 4, thereby preventing the metal grid structure from blocking the black matrix opening 5 and affecting the transmittance of the black matrix opening 5 area.

[0181] At the same time, due to the influence of the characteristics of the COE structure itself, the stacking thickness of each film layer on the touch function layer TSP is reduced, the dielectric constant of each film layer after stacking is increased, and the self-capacitance value of the touch substrate is increased. While ensuring the touch sensitivity, the disclosed embodiment opens the first opening V1 to the maximum extent inside the first main body 11, and opens the third opening V3 to the maximum extent inside the second main body 21, so that the first virtual electrode dummy1 is filled in the first opening V1, and the second virtual electrode dummy2 is filled in the third opening V3; at the same time, the second opening V2 is opened inside the first branch part 12, and the fourth opening V4 is opened inside the second branch part 22, so that the first virtual electrode dummy1 is filled in the second opening V2, and the second virtual electrode dummy2 is filled in the fourth opening V4, which can minimize the area of ​​the first touch electrode Tx and the second touch electrode Rx, thereby reducing the self-capacitance value formed between the first touch electrode Tx and the second touch electrode Rx and the finger, respectively, and then improve LGM, so as to improve the touch performance of the touch product in a weak grounding state.

[0182] In some embodiments, the display panel also includes a photosensitive device layer arranged on the side of the touch substrate away from the color filter layer CF, and the photosensitive device layer includes photosensitive devices arranged in an array; the black matrix BM has a plurality of photosensitive holes 6 passing through it along the thickness direction, and the photosensitive devices and the photosensitive holes 6 are arranged one by one.

[0183] Typically, the display panel includes a light sensing detection area, and a plurality of photosensitive holes 6 are arranged on the black matrix BM in the light sensing detection area, so as to transmit infrared light or receive ambient light to detect light sensitivity changes in the light sensing detection area.

[0184] Figure 8 A top view of a stack of a first touch layer and a second touch layer located in a light sensing detection area provided in an embodiment of the present disclosure, Fig. 9 A schematic diagram of a bridge structure provided by an embodiment of the present disclosure, wherein the gray line represents the routing of the first touch layer, the light gray line represents the routing of the second touch layer, and the black solid line represents the overlapping routing of the first touch layer and the second touch layer.

[0185] like Figure 8 As shown, it illustrates the distribution of the photosensitive holes 6 located on the black matrix BM. Figure 8 The network wiring in FIG. 1 is the bridge structure 7 of the first touch layer TMA and the metal mesh wiring of the second touch layer TMB.

[0186] like Figure 8 and Fig. 9As shown, the first touch layer TMA of the touch substrate includes multiple bridging structures 7; the bridging structure 7 includes multiple first surrounding parts 71 and a first middle part 72 connecting different first surrounding parts 71; at least part of the multiple first surrounding parts 71 is electrically connected to two adjacent first touch electrodes Tx through different first transfer holes.

[0187] Exemplarily, the distribution of the first touch electrodes Tx adopts the distribution as shown in FIG. 6 , and the two first surrounding portions 71 in the bridge structure 7 are electrically connected to two adjacent first touch electrodes Tx in the column direction Y through different first transfer holes.

[0188] Continue as Figure 8 and Fig. 9 As shown, the orthographic projection of the first surrounding portion 71 on the display substrate 4 surrounds the orthographic projection of the photosensitive hole 6 on the display substrate 4, which can effectively reduce the routing impedance of the bridge structure 7 around the photosensitive hole 6, thereby reducing the power consumption of the touch chip IC.

[0189] For example, Fig. 9 As shown, the first surrounding portion 71 is a closed structure, and its orthographic projection on the display substrate 4 completely surrounds the orthographic projection of the photosensitive hole 6 on the display substrate 4 .

[0190] In some embodiments, Figure 8 and Fig. 9 As shown, the orthographic projections of the two first surrounding portions 71 connecting the same first middle portion 72 on the display substrate 4 surround the orthographic projections of the photosensitive holes 6 located in different columns on the display substrate 4, which can avoid the metal grid routing in the second touch layer TMB to the greatest extent, thereby reducing the overlapping routing of the first touch layer TMA and the second touch layer TMB and reducing parasitic capacitance.

[0191] In some embodiments, Fig. 9 As shown, the first middle portion 72 includes a first sub-middle portion 721 and a second sub-middle portion 722, wherein one end of the first sub-middle portion 721 is connected to a first surrounding portion 71, and the other end is connected to one end of the second sub-middle portion 722; the other end of the second sub-middle portion 722 is electrically connected to another first surrounding portion 71.

[0192] In some embodiments, Fig. 9 As shown, the bridge structure 7 further includes a plurality of first overlapping portions 73 , one first overlapping portion 73 is connected to one first surrounding portion 71 , and the first overlapping portion 73 is electrically connected to the first touch electrode Tx through the second transfer hole.

[0193] Exemplarily, the bridge structure 7 includes two first overlapping portions 73 , which are used to connect two adjacent first touch electrodes Tx in the column direction Y respectively.

[0194] like Figure 8As shown, it illustrates the distribution of multiple black matrix openings 5, and the multiple black matrix openings 5 ​​are divided into multiple groups of black matrix opening groups 03 arranged side by side along the row direction X. Each group of black matrix opening groups 03 includes multiple black matrix openings 5 ​​arranged side by side along the column direction Y, and the black matrix openings 5 ​​in adjacent groups of black matrix opening groups 03 are staggered.

[0195] like Figure 8 and Fig. 9 As shown, the orthographic projection of the first overlapping portion 73 on the display substrate 4 surrounds the orthographic projection of the black matrix opening 5 on the display substrate 4 .

[0196] In this embodiment, the first overlapping portion 73 is added to connect the first touch electrode Tx to improve the connection stability; at the same time, the orthographic projection of the first overlapping portion 73 on the display substrate 4 surrounds the orthographic projection of the black matrix opening 5 on the display substrate 4, avoiding affecting the black matrix opening 5 while effectively reducing the routing impedance of the bridge structure 7 around the black matrix opening 5, thereby reducing the power consumption of the touch chip IC.

[0197] In some embodiments, Figure 8 and Fig. 9 As shown, the first surrounding portion 71 connected to the first overlapping portion 73 includes a first overlapping segment 711 and a non-overlapping segment 712 electrically connected to the first touch electrode Tx; the first overlapping portion 73 includes a plurality of second overlapping segments 731 electrically connected to the first touch electrode Tx, and the plurality of second overlapping segments 731 are connected end to end in sequence to form a closed structure, which can completely avoid the black matrix opening 5 and the black matrix BM, and the plurality of second overlapping segments 731 surrounding can reduce the resistance of the bridging structure.

[0198] like Figure 8 and Fig. 9 As shown, for the first surrounding portion 71 and the first overlapping portion 73 electrically connected to the same first touch electrode Tx, the first overlapping segment 711 is shared with one of the multiple second overlapping segments 731 to improve the stability of the electrical connection between the first overlapping portion 73 and the first surrounding portion 71 connected thereto; at the same time, the first overlapping segment 711 is shared with one of the multiple second overlapping segments 731 to further reduce the routing impedance.

[0199] Exemplarily, the first overlapping portion 73 includes six second overlapping segments 731, and the six second overlapping segments 731 are connected end to end in a hexagon. The first surrounding portion 71 includes a first overlapping segment 711 and three non-overlapping segments 712, and the first overlapping segment 711 and the three non-overlapping segments 712 are connected end to end in a quadrilateral.

[0200] Exemplarily, a transfer pad is provided at the connection point of each second overlapping section 731, the width of the transfer pad is greater than the width of the second transfer hole, and the orthographic projection of the second transfer hole on the display substrate 4 completely falls into the orthographic projection of the transfer pad on the display substrate 4, so as to improve the connection stability between the bridging structure 7 and the first touch electrode Tx.

[0201] In some embodiments, Figure 8 As shown in the AA' area in FIG, except for the routing of the overlapping position between the first touch layer TMA and the second touch layer TMB, the shortest distance between the contour edge of the positive projection of the non-overlapping segment 712 of the first surrounding portion 71 on the display substrate 4 and the contour edge of the positive projection of the second touch layer TMB on the display substrate 4 is greater than 5.2 μm, which reduces the overlapping routing of the first touch layer TMA and the second touch layer TMB, increases the overlapping distance between the two, and reduces the influence between the driving signal transmitted by the first touch electrode Tx and the sensing signal transmitted by the second touch electrode Rx.

[0202] In some embodiments, Fig. 9 As shown, the bridging structure 7 includes two bridging branches 7a and 7b, each bridging branch includes multiple first surrounding parts 71 and a first middle part 72 connecting different first surrounding parts 71; the two bridging branches are symmetrically arranged about a symmetry axis L1 that passes through the midpoints of the same positions of the two bridging branches along the column direction Y.

[0203] The bridge structure 7 provided in this embodiment is provided with two symmetrical bridge branches 7a and 7b to connect the first touch electrodes Tx, thereby improving the connection stability of two adjacent first touch electrodes Tx and reducing the wiring impedance.

[0204] In some embodiments, Fig.10 A top view of a stack of a first touch layer and a second touch layer located in a non-light sensing detection area provided in an embodiment of the present disclosure, Fig.11 A schematic diagram of another bridge structure provided by an embodiment of the present disclosure, wherein the gray line represents the routing of the first touch layer, the light gray line represents the routing of the second touch layer, and the black solid line represents the overlapping routing of the first touch layer and the second touch layer.

[0205] like Fig.10 As shown, the plurality of black matrix openings 5 ​​are divided into a plurality of black matrix opening groups 03 arranged side by side along the row direction X, each black matrix opening group 03 includes a plurality of black matrix openings 5 ​​arranged side by side along the column direction Y, and the black matrix openings 5 ​​in adjacent black matrix opening groups 03 along the row direction X are staggered.

[0206] Compared with the above Figure 8 and Fig. 9 The structure shown, Fig.10 and Fig.11The structure shown is a partial structure of the first touch layer TMA and the second touch layer TMB in the non-light sensing detection area. In the non-light sensing detection area, the black matrix BM is no longer provided with photosensitive holes 6, so the bridge structure 7 in the non-light sensing detection area mostly surrounds the black matrix opening 5.

[0207] Continue as Fig.10 and Fig.11 As shown, the first touch layer TMA of the touch substrate includes multiple bridge structures 7; the bridge structure 7 includes multiple second surrounding parts 74 and a second middle part 75 connecting different second surrounding parts 74; the multiple second surrounding parts 74 are electrically connected to two adjacent first touch electrodes Tx through different third transfer holes.

[0208] Exemplarily, the distribution of the first touch electrodes Tx adopts the distribution as shown in FIG. 6 , and the two second surrounding portions 74 in the bridge structure 7 are electrically connected to two adjacent first touch electrodes Tx in the column direction Y through different third transfer holes.

[0209] Continue as Fig.10 and Fig.11 As shown, the orthographic projection of the second surrounding portion 74 on the display substrate 4 surrounds the orthographic projection of the black matrix opening 5 on the display substrate 4, which can effectively reduce the routing impedance of the bridge structure 7 around the black matrix opening 5, thereby reducing the power consumption of the touch chip IC.

[0210] For example, Fig.11 As shown, the second surrounding portion 74 is a closed structure, and its orthographic projection on the display substrate 4 completely surrounds the orthographic projection of the black matrix opening 5 on the display substrate 4 .

[0211] For example, Fig.11 As shown, the second surrounding portion 74 includes a plurality of sub-lapping segments 741, and each sub-lapping segment 741 is connected end to end in sequence to form a closed structure, which is a rectangular closed structure. The two ends of each sub-lapping segment 741 are electrically connected to the same first touch electrode Tx through different third transfer vias. Exemplarily, a transfer pad is provided at the connection point of each sub-lapping segment 741, and the width of the transfer pad is greater than the width of the third transfer hole. The orthographic projection of the third transfer hole on the display substrate 4 completely falls into the orthographic projection of the transfer pad on the display substrate 4, so as to improve the connection stability between the bridge structure 7 and the first touch electrode Tx.

[0212] Exemplarily, the size of the transfer pad is 10μm×10μm, and the distance between the contour edge of the transfer pad's orthographic projection on the display substrate 4 and the contour edge of the black matrix opening 5 on the display substrate 4 is greater than 4μm, so as to avoid the transfer pad being too close to the black matrix opening 5 and affecting the transmittance of the black matrix opening 5.

[0213] In some embodiments, Fig.11 As shown, the second middle portion 75 includes a first middle section 751 and a second middle section 752, the first end of the first middle section 751 and the first end of the second middle section 752 are respectively connected to different second surrounding portions 74, the second end of the first middle section 751 is connected to the second end of the second middle section 752, and the connection point M and the first end of the first middle section 751 are located in the area where different black matrix opening groups 03 are located, which can avoid the metal grid routing in the second touch layer TMB to the greatest extent, thereby reducing the overlapping routing of the first touch layer TMA and the second touch layer TMB, and reducing parasitic capacitance.

[0214] Exemplarily, a transition pad is provided at the connection position between the first middle section 751 and the second middle section 752 .

[0215] Exemplarily, the first middle section 751 includes a first sub-middle section 7511 and a second sub-middle section 7512, wherein one end of the first sub-middle section 7511 is connected to a second surrounding portion 74, and the other end is connected to one end of the second sub-middle section 7512; one end of the second sub-middle section 7512 is connected to one end of the second middle section 752. The other end of the second middle section 752 is connected to another second surrounding portion 74. Exemplarily, the second middle section 752 includes a third sub-middle section 7521 and a fourth sub-middle section 7522, and the connection principle is the same as that of the first middle section 751, and the repeated parts are not repeated.

[0216] In some embodiments, Fig.11 As shown, the bridging structure 7 includes two bridging branches 7c and 7d, each of which includes a plurality of second surrounding portions 74 and a second intermediate portion 75 connecting different second surrounding portions 74; the two bridging branches 7c and 7d are symmetrically arranged about a symmetry axis L2 connecting the midpoints of the same positions of the two bridging branches along the column direction Y.

[0217] The bridge structure 7 provided in this embodiment is provided with two symmetrical bridge branches 7c and 7d for connecting two adjacent first touch electrodes Tx, thereby improving the connection stability of the two adjacent first touch electrodes Tx and reducing the wiring impedance.

[0218] In some embodiments, Fig.10As shown in the BB' area in FIG. 1 , the shortest distance between the orthographic projection of the connection point M of the first middle section 751 and the second middle section 752 on the display substrate 4 and the contour edge of the orthographic projection of the second touch layer TMB on the display substrate 4 is greater than 5.2 μm; the shortest distance between the orthographic projection of the overlapping points P1 and P2 of the second surrounding portion 74 and the second middle portion 75 on the display substrate 4 and the contour edge of the orthographic projection of the second touch layer TMB on the display substrate 4 is greater than 5.2 μm. The overlapping routing of the first touch layer TMA and the second touch layer TMB is reduced, and the overlapping distance between the two is increased, thereby reducing the influence between the driving signal transmitted by the first touch electrode Tx and the sensing signal transmitted by the second touch electrode Rx.

[0219] In some embodiments, Figure 8 As shown, the display panel also includes a photosensitive device layer arranged on the side of the touch substrate away from the color filter layer CF, and the photosensitive device layer includes photosensitive devices arranged in an array; the black matrix BM has a plurality of photosensitive holes 6 penetrating along its thickness direction, and the photosensitive devices and the photosensitive holes 6 are arranged in a one-to-one correspondence; the second touch layer TMB of the touch substrate also includes a plurality of connecting structures 8; the connecting structure 8 includes a plurality of third surrounding portions 81 and a third middle portion 82 connecting different third surrounding portions 81; the third middle portion 82 is connected to the second touch electrode Rx in the second touch layer TMB; the orthographic projection of the third surrounding portion 81 on the display substrate 4 at least surrounds a partial outline of the orthographic projection of the photosensitive hole 6 on the display substrate 4.

[0220] For example, Fig.12 for Figure 8 The schematic diagram of the connection structure is as follows: Fig.12 As shown, the third surrounding portion 81 is a closed structure, and the orthographic projection of the third surrounding portion 81 on the display substrate 4 completely surrounds the orthographic projection of the photosensitive hole 6 on the display substrate 4. For example, the third surrounding portion 81 includes four sub-line segments, and the four sub-line segments are sequentially connected end to end to form a quadrilateral structure that completely surrounds the orthographic projection of the photosensitive hole 6 on the display substrate 4, thereby increasing the routing impedance of the connection structure 8, thereby reducing the power consumption of the touch chip IC.

[0221] In some embodiments, Figure 8 or Fig.12 As shown, the orthographic projection of the third surrounding portion 81 on the display substrate 4 surrounds a partial outline of the orthographic projection of the photosensitive hole 6 on the display substrate 4 .

[0222] For example, Figure 8 or Fig.12As shown, the third surrounding portion 81 is a semi-enclosed structure, and the orthographic projection of the third surrounding portion 81 on the display substrate 4 surrounds a partial outline of the orthographic projection of the photosensitive hole 6 on the display substrate 4. For example, the third surrounding portion 81 includes three sub-line segments, and the three sub-line segments are sequentially connected to form a semi-enclosed structure, which surrounds the orthographic projection of the photosensitive hole 6 on the display substrate 4 from three sides. Since the metal grid wiring of the second touch layer TMB will reflect light, thereby affecting the light leakage ratio (for example, the ratio of the light value received by the light sensing detection area to the light value received by the sunlight passing through the light sensing detection area at a brightness of 70nit), the present disclosure sets part of the third surrounding portion 81 as a semi-enclosed structure, which can reduce the light leakage ratio.

[0223] In some embodiments, Figure 8 and Fig.12 As shown, a plurality of black matrix openings 5 ​​are divided into a plurality of black matrix opening groups 03 arranged side by side along the row direction X, each black matrix opening group 03 includes a plurality of black matrix openings 5 ​​arranged side by side along the column direction Y, and the black matrix openings 5 ​​in adjacent black matrix opening groups 03 are arranged alternately; a portion of the third middle segment 821 in the third middle portion 82 is connected to a portion of the sub-segments of the third surrounding portion 81 to form a closed structure, and the orthographic projection of the closed structure on the display substrate 4 surrounds the orthographic projection of the black matrix openings 5 ​​on the display substrate 4.

[0224] For example, Figure 8 and Fig.12 As shown, the third middle portion 82 includes a plurality of third middle segments 821, and different third middle segments 821 are interconnected and connected to different third surrounding portions 81. Some of the third middle segments 821 in the plurality of third middle segments 821 are connected end to end in sequence, and are connected end to end with a sub-segment in the third surrounding portion 81 to form a closed structure. In order to avoid affecting the transmittance of the black matrix opening 5, the orthographic projection of the closed structure on the display substrate 4 surrounds the orthographic projection of the black matrix opening 5 on the display substrate 4, and the routing impedance of the connection structure 8 around the black matrix opening 5 can be effectively reduced during the surrounding process, thereby reducing the power consumption of the touch chip IC.

[0225] In some embodiments, the touch leads corresponding to the first touch electrode Tx and the second touch electrode Rx can be switched to the metal layer on the display substrate 4 through the fourth transfer hole in the non-display area, and then connected to the integrated circuit or the flexible circuit board to reduce the overall display panel thickness and reduce costs.

[0226] In some embodiments, Figure 7 As shown, the display panel further includes a second encapsulation layer 9 disposed on the side of the color filter layer CF away from the buffer layer Buffer; the second encapsulation layer 9 includes a first inorganic encapsulation layer 91, an organic encapsulation layer 92 and a second inorganic encapsulation layer 93. The encapsulation stability of the color filter layer CF is improved by the inorganic-organic-inorganic material.

[0227] In addition, the embodiment of the present disclosure further provides a touch device, which includes the display panel of any one of the above embodiments. The touch device can be, for example, a mobile phone, a tablet computer, a television, a display, a laptop computer, a digital photo frame, a vehicle-mounted device, a smart bracelet, smart glasses, a vehicle-mounted display, a medical device, an industrial control device, a touch interactive terminal, or any other product with touch and display functions. Other essential components of the touch device should be understood by ordinary technicians in the field, and will not be repeated here, nor should they be used as limitations on the present disclosure.

[0228] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A touch substrate, characterized in that: It comprises a touch function layer; the touch function layer comprises a first touch layer and a second touch layer, and a touch insulation layer sandwiched between the first touch layer and the second touch layer; The second touch control layer includes a plurality of first touch control electrodes and a plurality of second touch control electrodes; The first touch electrode includes a first main body and a plurality of first branch parts; each of the first branch parts is connected to a side of the first main body and surrounds the first main body; the first main body has a first opening extending through the thickness direction thereof, and at least one of the first branch parts has a second opening extending through the thickness direction thereof, and a first virtual electrode is disposed in each of the first opening and the second opening, and the first virtual electrode is electrically insulated from the first main body and the first branch parts; The second touch electrode includes a second main body and multiple second branch parts; each of the second branch parts is connected to the side of the second main body and surrounds the second main body; the second main body has a third opening passing through it along the thickness direction, and at least one of the second branch parts has a fourth opening passing through it along the thickness direction, and a second virtual electrode is arranged in the third opening and the fourth opening, and the second virtual electrode is electrically insulated from the second main body and the second branch parts.

2. The touch substrate according to claim 1, characterized in that: The first branch portion includes a first sub-branch and a second sub-branch, the first sub-branch is connected to the side of the first main body portion, and the second sub-branch is located at a side of the connection end of the first sub-branch and the first main body portion away from the first main body portion; and / or, The second branch portion includes a third sub-branch and a fourth sub-branch, the third sub-branch is connected to the side of the second main body portion, and the fourth sub-branch is located on the side of the connection end of the third sub-branch and the second main body portion away from the second main body portion.

3. The touch substrate according to claim 2, characterized in that: The outline shape of the first main body is a polygon; the length extension direction of the first sub-branch is the same as the length extension direction of the side of the first main body connected thereto; and / or, The contour shape of the second main body is a polygon; the length extension direction of the third sub-branch is the same as the length extension direction of the side of the second main body connected thereto.

4. The touch control substrate according to claim 3, characterized in that: The second opening passes through the first sub-branch; the length extension direction of the first virtual electrode located at the second opening is the same as the length extension direction of the first sub-branch; and / or, The fourth opening passes through the third sub-branch; An extending direction of the length of the second virtual electrode located at the fourth opening is the same as an extending direction of the length of the third sub-branch.

5. The touch control substrate according to claim 2 or 3, characterized in that: The ratio of the maximum length of the first sub-branch in its length extension direction to the maximum length of the first main body in the length extension direction is in a range of 1:1 to 4:1; and / or, A ratio of a maximum length of the third sub-branch in its length extension direction to a maximum length of the second main body portion in the length extension direction is in a range of 1:1 to 4:

1.

6. The touch substrate according to claim 3, characterized in that: The second opening passes through the second sub-branch; the length extension direction of the first virtual electrode located at the second opening is the same as the length extension direction of the second sub-branch; and / or, The fourth opening runs through the fourth sub-branch; An extending direction of the length of the second dummy electrode located at the fourth opening is the same as an extending direction of the length of the fourth sub-branch.

7. The touch control substrate according to claim 3, characterized in that: The second opening includes a first sub-opening and a second sub-opening, and the first sub-opening and the second sub-opening are connected, the first sub-opening passes through the first sub-branch, and the second sub-opening passes through the second sub-branch; The length extension direction of the first virtual electrode located at the second opening is the same as the length extension direction of the second sub-branch; and / or, The fourth opening includes a third opening portion and a fourth sub-opening; the third sub-opening and the fourth sub-opening are connected, the third sub-opening passes through the third sub-branch, and the fourth sub-opening passes through the fourth sub-branch; An extending direction of the length of the second dummy electrode located at the fourth opening is the same as an extending direction of the length of the fourth sub-branch.

8. The touch control substrate according to any one of claims 2, 6 or 7, characterized in that: The ratio of the maximum length of the second sub-branch in its length extension direction to the maximum length of the first main body in the length extension direction is in the range of 0.7:1 to 2:1; and / or, A ratio of a maximum length of the fourth sub-branch in its length extension direction to a maximum length of the second main body portion in the length extension direction is in a range of 0.7:1 to 2:

1.

9. The touch substrate according to claim 3, characterized in that: The angle formed by the intersection of the first sub-branch and the second sub-branch is the same as the angle formed by adjacent sides of the first main body; and / or, The angle formed by the intersection of the third sub-branch and the fourth sub-branch is the same as the angle formed by adjacent sides of the second main body.

10. The touch control substrate according to claim 1, characterized in that: In an extension direction of the first branch portion in which the connection end of the first branch portion and the first main body portion is away from the first main body portion, a maximum length of the first branch portion is greater than a maximum length of the first main body portion in the same extension direction; In an extension direction of the second branch portion where a connecting end of the second branch portion and the second main body portion faces away from the second main body portion, a maximum length of the second branch portion is greater than a maximum length of the second main body portion in the same extension direction.

11. The touch substrate according to claim 1, characterized in that: The plurality of first touch electrodes are divided into M groups of first touch electrode groups arranged side by side in a row direction, and the plurality of second touch electrodes are divided into N groups of second touch electrode groups arranged side by side in a column direction, where M and N are both positive integers greater than or equal to 2; For any of the first touch electrode groups, it includes a plurality of first touch electrodes arranged side by side in a column direction, and two adjacent first touch electrodes in the same column are electrically connected; for a plurality of first branches in any of the first touch electrodes, they are divided into a first sub-branch and a second sub-branch arranged opposite to each other in a row direction, and a third sub-branch and a fourth sub-branch arranged opposite to each other in a column direction; For any second touch electrode group, it includes a plurality of second touch electrodes arranged side by side along the row direction, and two adjacent second touch electrodes in the same row are electrically connected; for a plurality of second branches in any second touch electrode, they are divided into a fifth sub-branch and a sixth sub-branch arranged opposite to each other along the row direction, and a seventh sub-branch and an eighth sub-branch arranged opposite to each other along the column direction; For the first touch electrode in the jth row of the i-th group of the first touch electrode group, the first touch electrode in the jth row of the i+1-th group of the first touch electrode group, the second touch electrode in the i-th column of the j-th group of the second touch electrode group and the second touch electrode in the i-th column of the j+1-th group of the second touch electrode group, a third virtual electrode is provided in the accommodating portion enclosed by the second sub-branch portion corresponding to the j-th row of the i-th group, the first sub-branch portion corresponding to the j-th row of the i+1-th group, the eighth sub-branch portion corresponding to the i-th column of the j-th group of the second touch electrode and the seventh sub-branch portion corresponding to the i-th column of the j+1-th group of the second touch electrode; 1≤i≤M, 1≤j≤N, and i and j are both positive integers.

12. The touch substrate according to claim 1, characterized in that: A fourth virtual electrode is disposed between any two adjacent first branch portions and second branch portions.

13. The touch substrate according to claim 1, characterized in that: For any of the first touch control electrodes, the ratio of the first virtual electrode to the first touch control electrode inside the first touch control electrode is between 30% and 70%; and / or, For any second touch control electrode, the ratio of the second virtual electrode inside the second touch control electrode ranges from 30% to 70%.

14. A display panel, characterized in that: It comprises a display substrate, a touch control substrate as claimed in any one of claims 1 to 13 arranged on the display substrate, and a color filter layer arranged on a side of the touch control substrate away from the display substrate; The color filter layer includes a black matrix and a plurality of color resist layers, the black matrix defines a plurality of black matrix openings, and one of the color resist layers is disposed in one of the black matrix openings; The orthographic projection of the black matrix on the display substrate covers the orthographic projection of the touch function layer on the display substrate.

15. The display panel according to claim 14, characterized in that: The display panel further comprises a photosensitive device layer disposed on a side of the touch substrate away from the color filter layer, wherein the photosensitive device layer comprises photosensitive devices arranged in an array; the black matrix has a plurality of photosensitive holes penetrating along the thickness direction thereof, and the photosensitive devices and the photosensitive holes are disposed in one-to-one correspondence; The first touch layer of the touch substrate includes a plurality of bridge structures; the bridge structures include a plurality of first surrounding portions and a first intermediate portion connecting different first surrounding portions; at least a portion of the plurality of first surrounding portions are electrically connected to two adjacent first touch electrodes through different first transfer holes; The orthographic projection of the first surrounding portion on the display substrate surrounds the orthographic projection of the photosensitive hole on the display substrate.

16. The display panel according to claim 15, characterized in that: The orthographic projections of the two first surrounding portions connecting the same first middle portion on the display substrate surround the orthographic projections of the photosensitive holes located in different columns on the display substrate.

17. The display panel according to claim 15, characterized in that: The bridge structure further includes a plurality of first overlapping portions, one of the first overlapping portions is connected to one of the first surrounding portions, and the first overlapping portion is electrically connected to the first touch electrode through a second transfer hole; The plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along a row direction, each of the black matrix opening groups comprises a plurality of black matrix openings arranged side by side along a column direction, and the black matrix openings in adjacent black matrix opening groups are arranged in a staggered manner; The orthographic projection of the first overlapping portion on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

18. The display panel according to claim 17, characterized in that: The first surrounding portion connected to the first overlapping portion includes a first overlapping section and a non-overlapping section electrically connected to the first touch electrode; The first overlapping portion includes a plurality of second overlapping sections electrically connected to the first touch electrode, and the plurality of second overlapping sections are sequentially connected end to end to form a closed structure; For the first surrounding portion and the first overlapping portion that are electrically connected to the same first touch electrode, the first overlapping section is shared by one of the plurality of second overlapping sections.

19. The display panel according to claim 18, characterized in that: The shortest distance between an edge of an outline of an orthographic projection of a non-overlapping segment of the first surrounding portion on the display substrate and an edge of an outline of an orthographic projection of the second touch layer on the display substrate is greater than 5.2 μm.

20. The display panel according to claim 15, characterized in that: The bridge structure comprises two bridge branches, each of which comprises a plurality of first surrounding portions and a first intermediate portion connecting different first surrounding portions; The two bridge branches are symmetrically arranged about a symmetry axis that runs through the midpoints of the two bridge branches at the same positions along the column direction.

21. The display panel according to claim 14, characterized in that: The plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along the row direction, each of the black matrix opening groups comprises a plurality of black matrix openings arranged side by side along the column direction, and the black matrix openings in adjacent black matrix opening groups along the row direction are arranged in a staggered manner; The first touch layer of the touch substrate includes a plurality of bridge structures; the bridge structures include a plurality of second surrounding portions and a second middle portion connecting different second surrounding portions; the plurality of second surrounding portions are electrically connected to two adjacent first touch electrodes through different third transfer holes respectively; The orthographic projection of the second surrounding portion on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

22. The display panel according to claim 21, characterized in that: The second middle portion includes a first middle section and a second middle section, the first end of the first middle section and the first end of the second middle section are respectively connected to different second surrounding portions, the second end of the first middle section is connected to the second end of the second middle section, and the connection point and the first end of the first middle section are located in different areas where the black matrix opening groups are located.

23. The display panel according to claim 21, characterized in that: The bridge structure comprises two bridge branches, each of which comprises a plurality of second surrounding portions and a second intermediate portion connecting different second surrounding portions; The two bridge branches are symmetrically arranged about a symmetry axis that runs through the midpoints of the two bridge branches at the same positions along the column direction.

24. The display panel according to claim 14, characterized in that: The display panel further comprises a photosensitive device layer disposed on a side of the touch substrate away from the color filter layer, wherein the photosensitive device layer comprises photosensitive devices arranged in an array; the black matrix has a plurality of photosensitive holes penetrating along the thickness direction thereof, and the photosensitive devices and the photosensitive holes are disposed in one-to-one correspondence; The second touch layer of the touch substrate further comprises a plurality of connection structures; the connection structures comprise a plurality of third surrounding portions and a third middle portion connecting different third surrounding portions; the third middle portion is connected to the second touch electrode in the second touch layer; The orthographic projection of the third surrounding portion on the display substrate at least surrounds a partial contour of the orthographic projection of the photosensitive hole on the display substrate.

25. The display panel according to claim 24, characterized in that: The orthographic projection of the third surrounding portion on the display substrate surrounds a partial contour of the orthographic projection of the photosensitive hole on the display substrate.

26. The display panel according to claim 24, characterized in that: The plurality of black matrix openings are divided into a plurality of black matrix opening groups arranged side by side along a row direction, each of the black matrix opening groups comprises a plurality of black matrix openings arranged side by side along a column direction, and the black matrix openings in adjacent black matrix opening groups are arranged in a staggered manner; Part of the third middle segment in the third middle portion is connected to part of the sub-line segments of the third surrounding portion to form a closed structure, and the orthographic projection of the closed structure on the display substrate surrounds the orthographic projection of the black matrix opening on the display substrate.

27. A touch device, characterized in that: The invention comprises the display panel as claimed in any one of claims 14 to 26.

Images