Touch substrate and display device

Abstract

The present disclosure relates to the field of touch control technology and provides a touch control substrate and a display device. The touch control substrate includes a first main electrode, a second main electrode, a plurality of first branch electrodes, a plurality of second branch electrodes, and a plurality of supplementary electrodes. The first main electrode extends along a first direction; the second main electrode extends along a second direction that intersects the first direction; a plurality of first branch electrodes are connected to the first main electrode and extend toward the second main electrode, and a first opening is defined in the first branch electrode; a plurality of second branch electrodes are connected to the second main electrode and extend toward the first main electrode, and the plurality of second branch electrodes are arranged alternately with the plurality of first branch electrodes, and a second opening is defined in the second branch electrodes; and a plurality of supplementary electrodes are disposed within the first and second openings. This touch control substrate meets the requirements of an active pen and can reduce the parameters that generate LGM.

Description

Technical Field

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

[0002] With the rapid development of AMOLED (Active Matrix Organic Light Emitting Diode), the development of smart devices such as mobile phones has entered the era of full-screen and narrow-framed displays. To provide users with a better user experience, features such as full-screen, narrow-framed, high-resolution, wearable and / or foldable displays, and active pen applications will inevitably become important development directions for AMOLED in the future. To make display panels lighter and thinner to accommodate future foldable and rollable products, FMLOC (Flexible Multi Layer On Cell) technology has been developed. To facilitate better human-computer interaction, the application of active pen technology has also become a key direction for future touchscreen development.

[0003] However, current touch substrates cannot meet the performance requirements of active pens.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Summary of the Invention

[0005] The purpose of the present disclosure is to overcome the deficiency of the above-mentioned prior art that cannot meet the needs of an active pen, and to provide a touch substrate that can meet the needs of an active pen and a display device including the touch substrate.

[0006] According to one aspect of the present disclosure, a touch control substrate is provided, comprising:

[0007] A first main electrode extending along a first direction;

[0008] a second main electrode extending along a second direction, wherein the second direction intersects the first direction;

[0009] a plurality of first branch electrodes connected to the first main electrode and extending toward the second main electrode, wherein the first branch electrodes are provided with a first opening;

[0010] a plurality of second branch electrodes connected to the second main electrode and extending toward the first main electrode, the plurality of second branch electrodes being arranged alternately with the plurality of first branch electrodes, and a second opening being provided in the second branch electrodes;

[0011] A plurality of supplementary electrodes are disposed in the first opening and the second opening.

[0012] In an exemplary embodiment of the present disclosure, two second main electrodes are provided, and the two second main electrodes are symmetrically arranged on both sides of the first main electrode.

[0013] In an exemplary embodiment of the present disclosure, the touch substrate further includes:

[0014] The main conductive bridge is connected between the two second main electrodes.

[0015] In an exemplary embodiment of the present disclosure, the touch substrate further includes:

[0016] The second conductive bridge is connected between the two second branch electrodes on both sides of the first main electrode.

[0017] In an exemplary embodiment of the present disclosure, the touch substrate further includes:

[0018] The first conductive bridge is connected between two of the first branch electrodes on both sides of the second main electrode.

[0019] In an exemplary embodiment of the present disclosure, the first main electrode, the second main electrode, the first branch electrode, the second branch electrode and the supplementary electrode are provided in the same layer and material, and the main conductive bridge, the second conductive bridge and the first conductive bridge are provided in the same layer and material.

[0020] In an exemplary embodiment of the present disclosure, the second direction is perpendicular to the first direction, the first branch electrode adjacent to the second main electrode is set to a rectangle, and the remaining first branch electrodes include a first horizontal branch and a first vertical branch, the extension direction of the first horizontal branch is consistent with the extension direction of the first main electrode, the extension direction of the first vertical branch is consistent with the extension direction of the second main electrode, one end of the first vertical branch is connected to the first main electrode, and the other end of the first vertical branch is connected to one end of the first horizontal branch to form an "L" shape, and the first horizontal branch extends toward one side of the second main electrode; the first opening is set to a rectangle or "L" shape corresponding to the first branch electrode.

[0021] In an exemplary embodiment of the present disclosure, the second branch electrode includes a second horizontal branch and a second vertical branch, the extension direction of the second horizontal branch is consistent with the extension direction of the first main electrode, the extension direction of the second vertical branch is consistent with the extension direction of the second main electrode, one end of the second horizontal branch is connected to the second main electrode, and the other end of the second horizontal branch is connected to one end of the second vertical branch to form an "L" shape, and the second vertical branch extends toward one side of the first main electrode; the second opening is set to an "L" shape corresponding to the second branch electrode.

[0022] In an exemplary embodiment of the present disclosure, the width of the first main electrode and the second main electrode is greater than or equal to three pixel pitches and less than or equal to five pixel pitches, and the width of the first branch electrode, the second branch electrode and the supplementary electrode is greater than or equal to two pixel pitches and less than or equal to three pixel pitches.

[0023] In an exemplary embodiment of the present disclosure, the first main electrode and the plurality of the first branch electrodes form touch sensing electrodes, and the second main electrode and the plurality of the second branch electrodes form touch driving electrodes.

[0024] In an exemplary embodiment of the present disclosure, the second direction is perpendicular to the first direction, the first branch electrode adjacent to the second main electrode is configured as a triangle, and the remaining first branch electrodes are configured as long strips; the second branch electrode is configured as a long strip.

[0025] According to another aspect of the present disclosure, a display device is provided, comprising: any one of the touch control substrates described above.

[0026] The touch-sensitive substrate disclosed herein has a first main electrode connected to a plurality of first branch electrodes, each extending toward a second main electrode. The second main electrode is connected to a plurality of second branch electrodes, each extending toward the first main electrode. The plurality of second branch electrodes are arranged alternately with the plurality of first branch electrodes, resulting in a more uniform distribution of the second branch electrodes and the first electrodes, improving mutual capacitance and satisfying finger touch performance. Furthermore, regardless of the area touched by the active stylus, a capacitance is formed with the first main electrode, the first branch electrode, the second main electrode, or the second electrode, thereby satisfying the coupling capacitance requirements between the active stylus and the touch sensing electrode and the touch driving electrode with good uniformity. Furthermore, a first opening is provided in the first branch electrode, within which a supplementary electrode is disposed. A second opening is provided in the second branch electrode, also within which a supplementary electrode is disposed. The supplementary electrodes can reduce the parameters associated with LGM.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0029] Figure 1 Schematic diagram of the structure of a touch unit of a touch substrate in the related art.

[0030] Figure 2 FIG. 1 is a schematic structural diagram of an exemplary embodiment of a touch unit of a touch substrate disclosed herein.

[0031] Figure 3 for Figure 2 Schematic diagram of the structure of the touch sensing electrode in FIG.

[0032] Figure 4 for Figure 2 Schematic diagram of the structure of the touch drive electrode.

[0033] Figure 5 Schematic diagram of the cross-sectional layer structure of the touch substrate disclosed in the present invention.

[0034] Figure 6 for Figure 1 Schematic diagram of the position structure of the touch substrate and the first simulated copper pillar.

[0035] Figure 7 for Figure 2 Schematic diagram of the position structure of the touch substrate and the first simulated copper pillar.

[0036] Figure 8 for Figure 1 Schematic diagram of the position structure of the touch substrate and the second simulated copper pillar.

[0037] Figure 9 for Figure 2 Schematic diagram of the position structure of the touch substrate and the second simulated copper pillar.

[0038] Figure 10 for Figure 4 Schematic diagram of the structure of the connection between the main conductive bridge and the second main electrode.

[0039] Figure 11 It is a structural schematic diagram of the connection between the first conductive bridge and the second conductive bridge.

[0040] Figure 12 FIG. 1 is a schematic structural diagram of another exemplary embodiment of a touch unit of a touch substrate disclosed herein.

[0041] Figure 13 FIG. 1 is a structural diagram of another exemplary embodiment of a touch unit of the touch substrate disclosed herein.

[0042] Figure 14 for Figure 2 Schematic diagram of the structure of a touch substrate formed by 2×2 touch units.

[0043] Figure 15 for Figure 13 Schematic diagram of the structure of a touch substrate formed by 2×2 touch units.

[0044] Figure 16 Schematic diagram of the structure of an exemplary embodiment of the display device disclosed herein.

[0045] Description of reference numerals:

[0046] 1. Display substrate; 101. Base substrate;

[0047] 2. Heat dissipation film;

[0048] 31. First back film; 32. Second back film;

[0049] 4. Display structure;

[0050] 5. Encapsulation layer;

[0051] 6. Touch substrate; 61. First main electrode; 62. Second main electrode; 63. First branch electrode; 631. First horizontal branch; 632. First vertical branch; 633. First opening; 64. Second branch electrode; 641. Second horizontal branch; 642. Second vertical branch; 643. Second opening; 65. Supplementary electrode; 66. Main conductive bridge; 67. First conductive bridge; 68. Second conductive bridge; 610. Touch drive electrode; 620. Touch sensing electrode;

[0052] 6a, base layer; 6b, first touch metal layer; 6c, first insulating layer; 6d, second touch metal layer; 6e, second insulating layer;

[0053] 7. Color film substrate;

[0054] 8. Optical adhesive layer; 9. Cover plate; 10. Main control circuit board; 11. Protective adhesive layer; 12. Support plate;

[0055] 131. A first simulated copper pillar; 132. A second simulated copper pillar. DETAILED DESCRIPTION

[0056] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent identical or similar structures, and thus their detailed descriptions will be omitted. Furthermore, the figures are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0057] Although relative terms such as "upper" and "lower" are used in this specification to describe the relationship of one illustrated component to another, these terms are used herein for convenience only, such as in accordance with the orientation of the illustrations in the accompanying drawings. It will be understood that if the illustrated device were flipped upside down, the component described as "upper" would become the component "lower." When a structure is referred to as "on" another structure, this may mean that the structure is integrally formed with the other structure, that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via the other structure.

[0058] The terms "a", "an", "the", "said" and "at least one" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to express open-ended inclusion and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.; the terms "first", "second" and "third" etc. are used only as labels and are not intended to limit the quantity of their objects.

[0059] In the related art, refer to Figure 1 As shown, in order to reduce the index parameters that generate LGM (Low Ground Mass), the reason for LGM is: the scenario of using a mobile phone is to play with the phone while lying on the bed. At this time, the human body is in a weak grounding state. Our mobile phone screen is a capacitive screen. At this time, the finger touches the screen. Due to the weak grounding, the amount of charge transferred from the screen by the finger is small, and the signal detected by the touch IC is weak, which leads to the phenomenon of insensitive touch or even random reporting. A large supplementary electrode 65 (Dummy pattern) is designed in the touch substrate, so that the supplementary electrode 65 in the FMLOC display panel is generally greater than or equal to 3.8mm and less than or equal to 4.2mm; it is precisely because of the existence of this large supplementary electrode 65 that the FMLOC display panel cannot meet the performance of the active pen. Specifically, because the diameter of the active pen is greater than or equal to 1mm and less than or equal to 1.5mm, when the active pen touches the supplementary electrode 65 area, the coupling capacitance between the active pen and the touch sensing electrode 620 and the touch driving electrode 610 will be very small, which cannot meet the performance requirements of the active pen.

[0060] The present disclosure provides a touch control substrate, referring to Figure 2 、 Figure 3 as well as Figure 4As shown, the touch substrate may include a first main electrode 61, a second main electrode 62, a plurality of first branch electrodes 63, a plurality of second branch electrodes 64, and a plurality of supplementary electrodes 65; the first main electrode 61 extends along a first direction; the second main electrode 62 extends along a second direction, which intersects the first direction; the plurality of first branch electrodes 63 are connected to the first main electrode 61 and extend toward the second main electrode 62, and a first opening 633 is provided in the first branch electrode 63; the plurality of second branch electrodes 64 are connected to the second main electrode 62 and extend toward the first main electrode 61, and the plurality of second branch electrodes 64 are alternately arranged with the plurality of first branch electrodes 63, and a second opening 643 is provided in the second branch electrodes 64; and the plurality of supplementary electrodes 65 are provided in the first opening 633 and the second opening 643.

[0061] In the touch substrate disclosed herein, a plurality of first branch electrodes 63 are connected to the first main electrode 61. The first branch electrodes 63 extend toward the second main electrode 62. A plurality of second branch electrodes 64 are connected to the second main electrode 62. The second branch electrodes 64 extend toward the first main electrode 61. The plurality of second branch electrodes 64 are arranged alternately with the plurality of first branch electrodes 63. This ensures a more uniform distribution of the second branch electrodes 64 and the first branch electrodes 63, thereby improving the mutual capacitance and meeting finger touch performance requirements. Furthermore, regardless of the area touched by the active stylus, capacitance is formed with the first main electrode 61, the first branch electrode 63, the second main electrode 62, or the second branch electrode 64. This satisfies the coupling capacitance requirements between the active stylus and the touch sensing electrode 620 and the touch driving electrode 610, and provides good uniformity. In addition, a first opening 633 is provided in the first branch electrode 63, and a supplementary electrode 65 is provided in the first opening 633. A second opening 643 is provided in the second branch electrode 64, and a supplementary electrode 65 is also provided in the second opening 643. The supplementary electrode 65 can reduce the index parameters of generating LGM.

[0062] In this exemplary embodiment, the touch control substrate may include a base layer 6a. The base layer 6a may be made of an organic material, PET (Polyethylene terephthalate), which can provide insulation and support for the touch control substrate. The base layer 6a may also be made of PI (polyimide). Of course, the base layer 6a may also be made of other colorless, transparent insulating materials, such as inorganic materials such as silicon nitride and silicon oxide.

[0063] In this example embodiment, referring to Figure 5 As shown, a first touch metal layer 6b is provided on one side of the base layer 6a, a first insulating layer 6c is provided on the side of the first touch metal layer 6b away from the base layer 6a, a second touch metal layer 6d is provided on the side of the first insulating layer 6c away from the base layer 6a, and a second insulating layer 6e is provided on the side of the second touch metal layer 6d away from the base layer 6a.

[0064] In addition, it should be noted that when the touch substrate is used in a display device, the base layer 6a may not be provided, but the first touch metal layer 6b may be directly formed on the packaging layer 5. Figure 16 shown.

[0065] The first touch metal layer 6b may include a first main electrode 61, a first branch electrode 63, a second main electrode 62, and a second branch electrode 64. Specifically, the first main electrode 61, the second main electrode 62, the first branch electrode 63, the second branch electrode 64, and the supplementary electrode 65 are disposed in the same layer and made of the same material. The second touch metal layer 6d may include a main conductive bridge 66, a first conductive bridge 67, and a second conductive bridge 68. Specifically, the main conductive bridge 66, the second conductive bridge 68, and the first conductive bridge 67 are disposed in the same layer and made of the same material.

[0066] It should be noted that the same layer and the same material setting are formed through the same patterning process.

[0067] The touch substrate may further include touch sensing leads, touch sensing ground leads, touch driving leads, and touch driving ground leads (not shown). The touch sensing leads may be connected to the first main electrode 61, and the touch driving leads may be connected to the second main electrode 62. The touch sensing leads, touch sensing ground leads, touch driving leads, and touch driving ground leads may be disposed on either the first touch metal layer 6b or the second touch metal layer 6d. Of course, the touch sensing leads may be connected to the second main electrode 62, and the touch driving leads may be connected to the first main electrode 61. In this case, the second main electrode 62 and the second branch electrode 64 form a touch sensing electrode 620, and the first main electrode 61 and the first branch electrode 63 form a touch driving electrode 610.

[0068] Please continue to refer to Figure 2-Figure 4 As shown, each electrode in the first touch metal layer 6b is described in detail below.

[0069] In this example embodiment, the first main electrode 61 may extend along the first direction, and the first main electrode 61 is provided in a strip shape.

[0070] The second main electrode 62 can extend along a second direction perpendicular to the first direction; the second main electrode 62 is also configured in an elongated strip shape. Two second main electrodes 62 can be provided, symmetrically arranged on either side of the first main electrode 61, and located on the centerline of the first main electrode 61. The two portions of the first main electrode 61 on either side of the second main electrode 62 are substantially identical. Of course, in other exemplary embodiments of the present disclosure, three, four, or more second main electrodes 62 can be provided, and the three, four, or more second main electrodes 62 can be evenly arranged on either side of the first main electrode 61.

[0071] The width of the first main electrode 61 and the second main electrode 62 are both greater than or equal to three pixel pitches and less than or equal to five pixel pitches.

[0072] It should be noted that the first direction may be the X direction shown in the figure, that is, the horizontal direction; the second direction may be the Y direction shown in the figure, that is, the vertical direction.

[0073] In this exemplary embodiment, the plurality of first branch electrodes 63 are connected to the first main electrode 61 and extend toward the second main electrode 62. The plurality of first branch electrodes 63 may be symmetrically arranged on both sides of the first main electrode 61. The plurality of first branch electrodes 63 may also be symmetrical with respect to the second main electrode 62.

[0074] Specifically, the four first branch electrodes 63 adjacent to the second main electrode 62 are rectangular in shape because they are located at corners. The remaining first branch electrodes 63 may include a first horizontal branch 631 and a first vertical branch 632. Both the first horizontal branch 631 and the first vertical branch 632 are strip-shaped. The first horizontal branch 631 extends in the same direction as the first main electrode 61, while the first vertical branch 632 extends in the same direction as the second main electrode 62. One end of the first vertical branch 632 is connected to the first main electrode 61, and the other end of the first vertical branch 632 is connected to one end of the first horizontal branch 631, forming an "L" shape. The first horizontal branch 631 extends toward the second main electrode 62. The lengths of the first horizontal branch 631 and the first vertical branch 632 increase with increasing distance from the intersection of the first and second main electrodes 61, 62, such that the overall length of the first branch electrodes 63 increases with increasing distance from the intersection of the first and second main electrodes 61, 62.

[0075] A first opening 633 is provided in the first branch electrode 63. Specifically, the first opening 633 provided in the rectangular first branch electrode 63 is also rectangular; the first opening 633 provided in the L-shaped first branch electrode 63 is also L-shaped.

[0076] A supplementary electrode 65 is provided in the first opening 633 , and the shape of the supplementary electrode 65 is the same as that of the first opening 633 , that is, the supplementary electrode 65 provided in the rectangular first opening 633 is also rectangular, and the supplementary electrode 65 provided in the “L”-shaped first opening 633 is also “L”-shaped.

[0077] In this exemplary embodiment, the plurality of second branch electrodes 64 are connected to the second main electrode 62 and extend toward the first main electrode 61. The plurality of second branch electrodes 64 may be symmetrically arranged on both sides of the second main electrode 62. The plurality of second branch electrodes 64 may also be symmetrical with respect to the first main electrode 61.

[0078] Specifically, because the first branch electrodes 63 are already located at the four corners, the second branch electrodes 64 are each configured in an L-shape. The second branch electrodes 64 include a second horizontal branch 641 and a second vertical branch 642. Each of the second horizontal branch 641 and the second vertical branch 642 is configured in an elongated strip shape. The second horizontal branch 641 extends in the same direction as the first main electrode 61, while the second vertical branch 642 extends in the same direction as the second main electrode 62. One end of the second horizontal branch 641 is connected to the second main electrode 62, and the other end of the second horizontal branch 641 is connected to one end of the first vertical branch 632, forming an L-shape. The first vertical branch 632 extends toward the first main electrode 61. The lengths of the second horizontal branch 641 and the second vertical branch 642 increase as the distance from the intersection of the first and second main electrodes 61 and 62 increases, resulting in an overall length increase as the distance from the intersection of the first and second main electrodes 61 and 62 increases.

[0079] A second opening 643 is provided in the second branch electrode 64. Specifically, the second opening 643 provided in the "L"-shaped second branch electrode 64 is also L"-shaped.

[0080] A supplementary electrode 65 is provided in the second opening 643 . The shape of the supplementary electrode 65 is the same as that of the second opening 643 . That is, the supplementary electrode 65 provided in the L-shaped second opening 643 is also L-shaped.

[0081] The plurality of second branch electrodes 64 are arranged alternately with the plurality of first branch electrodes 63. Specifically, two adjacent first branch electrodes 63 are arranged with an interval, i.e., a space is provided between the two adjacent first branch electrodes 63. The second branch electrodes 64 are arranged in the space between the two adjacent first branch electrodes 63, so that the plurality of second branch electrodes 64 and the plurality of first branch electrodes 63 are arranged alternately.

[0082] In this exemplary embodiment, the widths of the first branch electrodes 63 , the second branch electrodes 64 , and the supplementary electrodes 65 are greater than or equal to two pixel pitches and less than or equal to three pixel pitches.

[0083] It should be noted that the width of the first branch electrode 63 and the width of the second branch electrode 64 do not include the width of the supplementary electrode 65 in the middle, but are the widths of the first branch electrode 63 and the second branch electrode 64 on one side of the supplementary electrode 65 .

[0084] With this arrangement, no matter where the active pen touches, capacitance can be formed between the active pen and the touch sensing electrode 620 (the first main electrode 61 and the multiple first branch electrodes 63) or the touch driving electrode 610 (the second main electrode 62 and the multiple second branch electrodes 64), and the coupling capacitance will not be very small, which can meet the performance requirements of the active pen.

[0085] Reference Figure 6 shown Figure 1 The position structure diagram of the touch substrate and the first simulation copper column 131 in FIG. Figure 7 shown Figure 2 The position structure diagram of the touch substrate and the first simulated copper column 131. The diameter of the first simulated copper column 131 is about 1.5 mm. Figure 1 Touch substrate and Figure 2 The capacitance between the first simulated copper pillar 131 and the touch driving electrode 610 is Cftx, and the capacitance between the first simulated copper pillar 131 and the touch sensing electrode 620 is Cfrx.

[0086] The important parameter for evaluating the performance of the active pen is the coupling capacitance between the active pen and the touch substrate electrodes (i.e., Cftx and Cfrx). The larger the better. Figure 6 As shown in Table 1, the coupling capacitance between the active pen and the touch substrate electrodes is larger in the center area (that is, the geometric center area of ​​the touch unit), while the coupling capacitance between the active pen and the touch substrate electrodes is smaller in the large supplementary electrode area (called the worst point).

[0087] Table 1

[0088]

[0089] From Table 1 we can see that: Figure 2 When the touch substrate is in the middle, the coupling capacitance generated by the active pen (first simulated copper pillar 131) at any position is not much different, and the capacitance value is large, which can meet the performance requirements of the active pen and will not produce a worst point.

[0090] Reference Figure 8 shown Figure 1 The position structure diagram of the touch substrate and the second simulation copper column 132 in FIG. Figure 9 shown Figure 2 The position structure diagram of the touch substrate and the second simulated copper column 132. The diameter of the second simulated copper column 132 is about 4 mm. Figure 1 Touch substrate and Figure 2The following table compares the simulated data of the touch substrate and the active stylus (second simulated copper pillar 132 with a diameter of 4mm) in Figure 1. In the table: Cm(Nofinger) is the coupling capacitance between the touch drive electrode Tx and the touch sensing electrode Rx when there is no finger touch, also known as the mutual capacitance of Tx / Rx; Cm'(Withfinger) is the mutual capacitance between the touch drive electrode Tx and the touch sensing electrode Rx when there is a finger touch; Delta Cm is Cm(Nofinger) - Cm'(Withfinger); Delta Cm / Cm is the rate of change of mutual capacitance; Cp_tx(Nofinger) is the coupling capacitance of the touch drive electrode Tx to the cathode; and Cp_rx(Nofinger) is the coupling capacitance of the touch sensing electrode Rx to the cathode.

[0091] Table 2

[0092] Figure 1 Touch substrate in Figure 2 Touch substrate in Cm(Nofinger)(pF) 1.07 1.15 Cm'(Withfinger)(pF) 0.952 1.023 Delta Cm(pF) 0.118 0.127 Delta Cm / Cm 11.03％ 11.04％ Cftx(pF) 0.56 0.56 Cfrx(pF) 0.567 0.55 Cp_tx(Nofinger)(pF) 8.365 8.936 Cp_rx(Nofinger)(pF) 8.606 8.853 Rtx (unit: Ω) 32.92 34.26 Rrx (unit: Ω) 34.63 33.47

[0093] From Table 2 we can get: Figure 2 The touch substrate in the active pen performance is improved while the finger touch performance is better. Figure 1 The touch performance of the touch substrate in is similar.

[0094] The first main electrode 61, the second main electrode 62, the first branch electrode 63, the second branch electrode 64, and the supplementary electrode 65 are all configured as a metal mesh structure. That is, the first touch metal layer 6b is configured as a metal mesh structure in the touch area, and the metal mesh structure is disconnected at adjacent locations of the first main electrode 61, the second main electrode 62, the first branch electrode 63, the second branch electrode 64, and the supplementary electrode 65 to form the above-mentioned different electrodes.

[0095] The conductive bridges in the second touch metal layer 6d are described in detail below.

[0096] In this exemplary embodiment, a main conductive bridge 66 is connected between the two second main electrodes 62 ; a second conductive bridge 68 is connected between the two second branch electrodes 64 on both sides of the first main electrode 61 ; and a first conductive bridge 67 is connected between the two first branch electrodes 63 on both sides of the second main electrode 62 .

[0097] Specifically, refer to Figure 4 as well as Figure 10 As shown, four first vias are provided on the second insulating layer 6e. Two of the first vias are connected to the adjacent ends of the two second main electrodes 62 in a one-to-one correspondence, and the other two first vias are also connected to the adjacent ends of the two second main electrodes 62 in a one-to-one correspondence; that is, two vias are provided at the ends of one second main electrode 62. The main conductive bridge 66 is connected to the two second main electrodes 62 through the first vias.

[0098] A plurality of second vias are provided on the second insulating layer 6e. Two second vias form a pair. The pair of second vias are connected to two second branch electrodes 64 symmetrical with respect to the first main electrode 61 in a one-to-one correspondence. The second conductive bridge 68 is connected to the two second branch electrodes 64 through the second vias.

[0099] Reference Figure 3 as well as Figure 11 As shown, a plurality of third vias are provided on the second insulating layer 6e, and two third vias form a pair. The pair of third vias are connected one-to-one to two first branch electrodes 63 symmetrical with respect to the second main electrode 62, and the first conductive bridge 67 is connected to the two first branch electrodes 63 through the third vias.

[0100] The first main electrode 61 and the plurality of first branch electrodes 63 form the touch sensing electrode 620, and the second main electrode 62 and the plurality of second branch electrodes 64 form the touch driving electrode 610. Of course, the first main electrode 61 and the plurality of first branch electrodes 63 may also form the touch driving electrode 610, and the second main electrode 62 and the plurality of second branch electrodes 64 may form the touch sensing electrode 620.

[0101] The current of the touch sensing electrode 620 is input through the first main electrode 61 and flows to the first branch electrodes 63 on both sides of the first main electrode 61. After the two first branch electrodes 63 on both sides of the second main electrode 62 are electrically connected by the first conductive bridge 67, the touch sensing electrode 620 forms a parallel resistance structure, thereby reducing the resistance of the touch sensing electrode 620 and improving the charging frequency.

[0102] The current of the touch drive electrode 610 is input through the second main electrode 62 and flows to the second branch electrodes 64 on both sides of the second main electrode 62. The second main electrode 62 is connected through the main conductive bridge 66 to ensure the smoothness of the circuit. After the two second branch electrodes 64 on both sides of the first main electrode 61 are connected through the second conductive bridge 68, the touch drive electrode 610 forms a parallel resistance structure, thereby reducing the resistance of the touch drive electrode 610 and increasing the charging frequency.

[0103] Table 3 shows a comparison table of the resistance Rrx of the touch sensing electrode 620 and the resistance Rtx of the touch driving electrode 610 in a common structure when the first branch electrode 63 and the second branch electrode 64 are not connected and in a bridge structure after the first branch electrode 63 and the second branch electrode 64 are connected.

[0104] Table 3

[0105] Ordinary structure Bridge structure Rtx (unit: Ω) 32.92 16.8 Rrx (unit: Ω) 34.63 18.6

[0106] From Table 3, it can be seen that the resistance of the bridge structure is about half of that of the ordinary structure.

[0107] In addition, the structure of each electrode in the first touch metal layer 6b is not limited to the above description. Figure 12 As shown, in other exemplary embodiments of the present disclosure, one touch unit in the touch substrate may include only one-fourth of the touch units in the aforementioned exemplary embodiment, that is, one end of the first main electrode 61 and one end of the second main electrode 62 are adjacently arranged. Of course, one touch unit in the touch substrate may also include only one-half of the touch units in the aforementioned exemplary embodiment.

[0108] Also, refer to Figure 13 As shown, the structures of the first main electrode 61 and the second main electrode 62 are similar to those of Figure 2-Figure 3 The first main electrode 61 and the second main electrode 62 have the same structure. The first branch electrode 63 and the second branch electrode 64 can both be arranged in a straight line. For example, the first branch electrode 63 extends approximately 45 degrees toward the second main electrode 62, and the second branch electrode 64 also extends approximately 45 degrees toward the first main electrode 61. It should be noted that the first branch electrode 63 near the second main electrode 62 is arranged at a corner, so the first branch electrode 63 is arranged in a triangular shape. Of course, if some of the second branch electrodes 64 are arranged at a corner, the second branch electrodes 64 can also be arranged in a triangular shape.

[0109] The above is a specific structure of a touch unit in the touch substrate. The touch substrate includes a plurality of touch units arranged in an array. Figure 14 The schematic diagram of the structure of a touch substrate formed by 2×2 touch units shows that two touch units form a row in the first direction, and the two rows of touch units are arranged sequentially in the second direction, forming a 2×2 arrangement. The first main electrodes 61 of the touch units in the same row are connected sequentially via a first connecting portion. The first main electrodes 61 of multiple touch units can be directly configured as a connected structure, that is, the first connecting portion and the first main electrodes 61 are both provided on the first touch metal layer 6b. The second main electrodes 62 of the touch units in the same column (second direction) are connected sequentially via a second connecting portion. The second connecting portion and the second main electrode 62 are both provided on the first touch metal layer 6b, forming a mesh structure.

[0110] Reference Figure 15 As shown, 2×2 touch units can also be connected diagonally. Similarly, the first main electrodes 61 of the touch units located in the same row are connected in sequence through the first connecting portion. The first main electrodes 61 of multiple touch units can be directly set to a structure connected as an integral whole, that is, the first connecting portion and the first main electrode 61 are both set in the first touch metal layer 6b; the second main electrodes 62 of the touch units located in the same column (second direction) are connected in sequence through the second connecting portion. The second connecting portion can be set to a bridging structure, that is, the second connecting portion is set in the same layer as the second touch metal layer.

[0111] Furthermore, the present disclosure also provides a display device, referring to Figure 16 As shown, the display device may include any one of the above-mentioned touch control substrates 6. The specific structure of the touch control substrate 6 has been described in detail above, so it will not be repeated here.

[0112] The display device may further include a display substrate 1, an encapsulation layer 5 disposed on one side of the display substrate 1, a touch substrate 6 disposed on the side of the encapsulation layer 5 away from the display substrate 1, a color filter substrate 7 disposed on the side of the touch substrate 6 away from the display substrate 1, an optical adhesive layer 8 disposed on the side of the color filter substrate 7 away from the display substrate 1, and a cover plate 9 disposed on the side of the optical adhesive layer 8 away from the display substrate 1. A first backing film 31 is disposed on the side of the display substrate 1 away from the encapsulation layer 5, and a heat dissipation film 2 is disposed on the side of the first backing film 31 away from the display substrate 1. The display substrate 1 includes a display structure 4 and a base substrate 101. The base substrate 101 is bonded to the first backing film 31, and the display structure 4 is disposed on the side of the base substrate 101 away from the first backing film 31.

[0113] One end of the display substrate 1 is bound and connected to the main control circuit board 10, and the end connected to the main control circuit board 10 is bent to the non-display side of the display substrate 1 to reduce the border width of the display device; a second back film 32 is provided on the side of the end of the display substrate 1 connected to the main control circuit board 10 facing the heat dissipation film 2, and a support plate 12 is provided between the second back film 32 and the heat dissipation film 2 for supporting the formation of a bending space.

[0114] A protective adhesive layer 11 is provided outside the bend area of ​​the display substrate 1. Specifically, the protective adhesive layer 11 is provided on the side of the display structure 4 away from the base substrate 101. The touch substrate 6 is connected to the signal lead lines on the display substrate 1 via through-holes provided in the display substrate 1. The signals of the touch substrate 6 are connected to the main control circuit board 10 through the display substrate 1.

[0115] The display substrate 1 , the encapsulation layer 5 and the touch substrate 6 may also be an integral structure.

[0116] It should be noted that the specific type of the display device is not particularly limited, and any type of display device commonly used in the field can be used, such as mobile devices such as mobile phones, wearable devices such as watches, VR devices, etc. Those skilled in the art can make corresponding choices based on the specific purpose of the display device, which will not be repeated here.

[0117] It should be noted that the display device also includes other necessary components and components, such as the display as an example, such as the housing, circuit board, power cord, etc. Those skilled in the art can make corresponding supplements based on the specific usage requirements of the display device, which will not be repeated here.

[0118] Compared with the prior art, the beneficial effects of the display device provided by the exemplary embodiment of the present invention are the same as the beneficial effects of the touch substrate 6 provided by the above exemplary embodiment, and are not described in detail here.

[0119] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the appended claims.

Claims

1. A touch substrate, characterized in that: include: A first main electrode extending along a first direction; a second main electrode extending along a second direction, wherein the second direction intersects the first direction; a plurality of first branch electrodes connected to the first main electrode and extending toward the second main electrode, wherein the first branch electrodes are provided with a first opening; a plurality of second branch electrodes connected to the second main electrode and extending toward the first main electrode, the plurality of second branch electrodes being arranged alternately with the plurality of first branch electrodes, and a second opening being provided in the second branch electrodes; a plurality of supplementary electrodes disposed in the first opening and the second opening, wherein a width of the supplementary electrodes is greater than or equal to two pixel pitches and less than or equal to three pixel pitches; a first conductive bridge connected between two of the first branch electrodes on both sides of the second main electrode, and two of the first conductive bridges connected between four of the first branch electrodes on both sides of the second main electrode, so that the four first branch electrodes are connected to form a ring; The second conductive bridge is connected between two of the second branch electrodes on both sides of the first main electrode, and the two second conductive bridges are connected between four of the second branch electrodes on both sides of the first main electrode, so that the four second branch electrodes are connected to form a ring.

2. The touch substrate according to claim 1, wherein: There are two second main electrodes, and the two second main electrodes are symmetrically arranged on both sides of the first main electrode.

3. The touch substrate according to claim 2, wherein: The touch substrate further includes: The main conductive bridge is connected between the two second main electrodes.

4. The touch substrate according to claim 3, wherein: The first main electrode, the second main electrode, the first branch electrode, the second branch electrode and the supplementary electrode are provided in the same layer and made of the same material; the main conductive bridge, the second conductive bridge and the first conductive bridge are provided in the same layer and made of the same material.

5. The touch substrate according to claim 1, wherein: The second direction is perpendicular to the first direction, the first branch electrode adjacent to the second main electrode is set to a rectangle, and the remaining first branch electrodes include a first transverse branch and a first longitudinal branch. The extension direction of the first transverse branch is consistent with the extension direction of the first main electrode, and the extension direction of the first longitudinal branch is consistent with the extension direction of the second main electrode. One end of the first longitudinal branch is connected to the first main electrode, and the other end of the first longitudinal branch is connected to one end of the first transverse branch to form an "L" shape. The first transverse branch extends toward one side of the second main electrode; the first opening is set to a rectangle or "L" shape corresponding to the first branch electrode.

6. The touch substrate according to claim 1, wherein: The second branch electrode includes a second horizontal branch and a second vertical branch. The extension direction of the second horizontal branch is consistent with the extension direction of the first main electrode, and the extension direction of the second vertical branch is consistent with the extension direction of the second main electrode. One end of the second horizontal branch is connected to the second main electrode, and the other end of the second horizontal branch is connected to one end of the second vertical branch to form an "L" shape. The second vertical branch extends toward one side of the first main electrode; the second opening is set to an "L" shape corresponding to the second branch electrode.

7. The touch substrate according to claim 1, wherein: The width of the first main electrode and the second main electrode is greater than or equal to three pixel pitches and less than or equal to five pixel pitches, and the width of the first branch electrode and the second branch electrode is greater than or equal to two pixel pitches and less than or equal to three pixel pitches.

8. The touch substrate according to claim 1, wherein: The first main electrode and the plurality of the first branch electrodes form touch sensing electrodes, and the second main electrode and the plurality of the second branch electrodes form touch driving electrodes.

9. A display device, characterized in that: include: The touch panel according to any one of claims 1 to 8.

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