Touch Component and Touch Display Device

Abstract

The present application provides a touch control component and a touch display device. The touch control component includes a touch control layer, and the touch control layer includes a plurality of touch control units. Each touch control unit includes: a first touch control electrode arranged along a first direction, and the first touch control electrode includes: a first main electrode arranged along the first direction, and at least one first branch electrode, one end of the first branch electrode is electrically connected to the first main electrode; a second touch control electrode arranged along a second direction, and the second touch control electrode includes: a second main electrode arranged along the second direction, at least one second branch electrode, at least one first connection branch electrode, one end of the second branch electrode is electrically connected to the second main electrode, both ends of the first connection branch electrode are respectively electrically connected to the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction.

Description

Technical Field

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

[0002] Capacitive touch screens are widely used in various electronic interaction scenario devices due to their high durability, long lifespan, and support for multi-touch functions. A capacitive touch screen detects the specific position of a finger touch by detecting the change in capacitance at the position where the finger touches.

[0003] Currently, the material of the touch electrode is usually a hollow metal mesh (Metal Mesh) material. Compared with the touch electrode made of the traditional entire-surface transparent indium tin oxide (ITO) material, its actual effective conductive electrode area is smaller. Therefore, the mutual capacitance induction amount between the driving electrode TX and the sensing electrode RX of the touch electrode is very small, resulting in a smaller capacitance change when a finger touches, and it is not easily detected by the touch chip (Touch IC).

[0004] Therefore, it is necessary to propose a technical solution to solve the problem of the relatively small mutual capacitance between the driving electrode and the sensing electrode of the touch electrode. Summary of the Invention

[0005] The purpose of the present application is to provide a touch component and a touch display device, so as to increase the mutual capacitance between the driving electrode and the sensing in each touch unit while reducing the impedance of one of the driving electrode or the sensing electrode in each touch unit, and improve the touch reporting rate of the touch display device.

[0006] A touch component, the touch component includes a touch layer, the touch layer includes a plurality of touch units, and each touch unit includes:

[0007] A first touch electrode arranged along a first direction, the first touch electrode includes: a first main electrode arranged along the first direction, and at least one first branch electrode, one end of the first branch electrode is electrically connected to the first main electrode;

[0008] A second touch electrode arranged along a second direction, the second touch electrode includes: a second main electrode arranged along the second direction, at least one second branch electrode, at least one first connection branch electrode, one end of the second branch electrode is electrically connected to the second main electrode, both ends of the first connection branch electrode are respectively electrically connected to the second branch electrode and the second main electrode, the second branch electrode surrounds the corresponding first branch electrode, and the first direction is different from the second direction.

[0009] In the above touch component, in a first region enclosed by the corresponding first connection branch electrode, the second main electrode, and the second branch electrode in the same touch unit, a first hollow portion is provided, and a first virtual electrode is provided in the first hollow portion.

[0010] In the above touch component, the second touch electrode further includes: a second connection branch electrode, one end of the second connection branch electrode is electrically connected to the corresponding second branch electrode, and the other end thereof is electrically connected to one end of the second connection branch electrode in an adjacent touch unit along the second direction.

[0011] In the above touch component, in a second region enclosed by the corresponding second connection branch electrode and the second branch electrode in two adjacent touch units along the second direction, a second hollow portion is provided, and a second virtual electrode is provided in the second hollow portion.

[0012] In the above touch component, one end of the second branch electrode away from the end where the second branch electrode is connected to the second main electrode is electrically connected to one end of the corresponding second branch electrode in an adjacent touch unit along the second direction.

[0013] In the above touch component, in a third region enclosed by the corresponding first connection branch electrode, second connection branch electrode, second main electrode, and second branch electrode in the same touch unit, a third hollow portion is provided, and a third virtual electrode is provided in the third hollow portion.

[0014] In the above touch component, in a fourth region enclosed by the corresponding second branch electrode and the first main electrode in two adjacent touch units along the first direction, a fourth hollow portion is provided, and a fourth virtual electrode is provided in the fourth hollow portion.

[0015] In the above touch component, one end of the second branch electrode away from the second main electrode is insulated from one end of an adjacent second branch electrode in an adjacent touch unit along the first direction.

[0016] In the above touch component, the first main electrode includes: a plurality of first widened portions and a first connection portion electrically connected to the first widened portions,

[0017] The first branch electrode includes: a plurality of second widened portions and a second connection portion electrically connected to the second widened portions,

[0018] The second branch electrode surrounds the corresponding second widened portion and the second connection portion.

[0019] In the above touch component, the width of the first widening portion of each of the first main electrodes near the first branch electrode extending from the first main electrode is smaller than the width of the first widening portion of the first branch electrode far from the first main electrode.

[0020] In the above touch component, the first connection branch electrode is arranged corresponding to the second widening portion of the first branch electrode adjacent to the first connection branch electrode.

[0021] In the above touch component, one end of the first branch electrode is electrically connected to the intersection of the first main electrode and the second main electrode, and the included angle α between the first branch electrode and the first main electrode satisfies 0° < α < 90°;

[0022] One end of the second branch electrode is electrically connected to the intersection of the second main electrode and the first main electrode, and the included angle β between the second branch electrode and the second main electrode satisfies 0° < β < 90°.

[0023] In the above touch component, the first direction is perpendicular to the second direction, the included angle α between the first branch electrode and the first main electrode is 45°, and the included angle β between the second branch electrode and the second main electrode is 45°.

[0024] In the above touch component, the first touch electrode and the second touch electrode are respectively mirror-symmetrical about the first main electrode and the second main electrode at the same time.

[0025] In the above touch component, the first main electrodes on both sides of the intersection of the first main electrode and the second main electrode are connected by a third connection portion;

[0026] The second main electrodes on both sides of the intersection of the first main electrode and the second main electrode are connected by a fourth connection portion;

[0027] The fourth connection portion is two non-connected connection bridges, and the third connection portion and the fourth connection portion are insulated from each other.

[0028] A touch display device, the touch display device includes the above touch component and a display panel, the touch component is located on one side of the display panel, the display panel includes an organic light-emitting diode array layer and a packaging layer, and the packaging layer is located between the organic light-emitting diode array layer and the touch component.

[0029] Beneficial effects: The present application provides a touch component and a touch display device. The touch component includes a touch layer, and the touch layer includes a plurality of touch units. Each touch unit includes: a first touch electrode arranged along a first direction, and the first touch electrode includes: a first main electrode arranged along the first direction, and at least one first branch electrode, with one end of the first branch electrode electrically connected to the first main electrode; a second touch electrode arranged along a second direction, and the second touch electrode includes: a second main electrode arranged along the second direction, at least one second branch electrode, and at least one first connection branch electrode, with one end of the second branch electrode electrically connected to the second main electrode, and both ends of the first connection branch electrode respectively electrically connected to the second branch electrode and the second main electrode, and the second branch electrode surrounding the corresponding first branch electrode, where the first direction is different from the second direction. By arranging the first connection branch electrode between the second branch electrode and the second main electrode to increase the current transmission channels in the second direction in each touch unit, thereby reducing the impedance of the second touch electrode in each touch unit, and each second branch electrode surrounds a first branch electrode to increase the mutual capacitance between the first branch electrode and the second branch electrode. Reducing the impedance of the second electrode in each touch unit and cooperating with increasing the mutual capacitance of each touch unit is beneficial to improving the touch reporting rate of the touch display device. Description of the Drawings

[0030] Figure 1 Schematic diagram of the touch display device of the present application;

[0031] Figure 2 Schematic diagram of the driving architecture of the touch layer of the touch display device of the present application;

[0032] Figure 3 is Figure 2 the first schematic diagram of the touch unit shown;

[0033] Figure 4 for multiple Figure 3 schematic diagram of the array arrangement of the touch units shown;

[0034] Figure 5 is Figure 3 schematic diagram of the first touch electrode of the touch unit shown;

[0035] Figure 6 is Figure 3 schematic diagram of the second touch electrode of the touch unit shown;

[0036] Figure 7 is Figure 2 the second schematic diagram of the touch unit shown;

[0037] Figure 8A the first schematic diagram of a metal mesh surrounding sub-pixels;

[0038] Figure 8B The second schematic diagram of a sub-pixel surrounded by a metal grid.

[0039] The reference signs in the drawings are as follows:

[0040] 10 Substrate; 20 Thin film transistor array layer; 30 Organic light emitting diode array layer; 40 Encapsulation layer; 50 Touch layer; 60 Polarizer; 70 Protection cover plate; 501 First touch electrode; 5011 First main electrode; 50111 First widened portion; 50112 First connection portion; 5012 First branch electrode; 50121 Second widened portion; 50122 Second connection portion; 5013 Third connection portion; 502 Second touch electrode; 502a First hollowed-out portion; 502b Second hollowed-out portion; 502c Third hollowed-out portion; 502d Fourth hollowed-out portion; 5021 Second main electrode; 5022 Second branch electrode; 5023 First connection branch electrode; 5024 Second connection branch electrode; 5025 Fourth connection portion; 503 First lead; 504 Second lead; 505 Touch unit; 5061 First virtual electrode; 5062 Second virtual electrode; 5063 Third virtual electrode; 5064 Fourth virtual electrode. Specific embodiments

[0041] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0042] Please refer to Figure 1 , which is a schematic diagram of the touch display device of the present application. The touch display device can be a flexible foldable touch display device or a rigid touch display device. The touch display device includes a touch component and a display panel. The touch component can be located on one side of the display panel to form an external touch display device. The touch component can be located inside the display panel to form an inlaid touch display device. The display panel can be a liquid crystal display panel or an organic light emitting diode display panel. Hereinafter, the present application will be described by taking the display panel as an organic light emitting diode display panel as an example.

[0043] The touch display device 100 includes a display panel, a touch component, a polarizer 60, and a protection cover plate 70 stacked in sequence. The display panel includes a substrate 10, a thin film transistor array layer 20, an organic light emitting diode array layer 30, and an encapsulation layer 40 stacked in sequence. The touch component includes a touch layer 50. The encapsulation layer 40 is located between the organic light emitting diode array layer 30 and the touch component.

[0044] The substrate 10 is a flexible substrate, and the substrate 10 provides a support surface for film layers such as the thin film transistor array layer 20 as a carrier. The substrate 10 can also be a glass substrate or the like.

[0045] The thin film transistor array layer 20 includes a plurality of thin film transistors arranged in an array. The thin film transistors are used to control the operating states of the organic light emitting diodes in the organic light emitting diode array layer 30. The thin film transistors can be at least one of amorphous silicon thin film transistors, polysilicon thin film transistors, or metal oxide thin film transistors.

[0046] The organic light emitting diode array layer 30 includes a plurality of organic light emitting diodes arranged in an array. The plurality of organic light emitting diodes arranged in an array include a plurality of independent anodes, one organic light emitting unit corresponding to each anode, and a common cathode. The plurality of organic light emitting diodes arranged in an array constitute a plurality of sub-pixels of the organic light emitting diode display panel, and one organic light emitting diode corresponds to one sub-pixel. The plurality of sub-pixels include a red sub-pixel R, a blue sub-pixel B, and a green sub-pixel G. The shape of the sub-pixel can be a square, a rectangle, or a rhombus, etc. The shape of the sub-pixel can be an ellipse or a quadrilateral with an inwardly recessed arc edge. The size of the sub-pixel is several tens of micrometers.

[0047] The encapsulation layer 40 can be a thin film encapsulation layer. The thin film encapsulation layer includes two inorganic layers and an organic layer located between the two inorganic layers. The inorganic layer is formed by chemical sputtering deposition, and the organic layer is formed by coating or the like. The thickness of the thin film encapsulation layer is 3 micrometers - 10 micrometers, for example, 5 micrometers, 6 micrometers, or 8 micrometers. The preparation material of the inorganic layer is selected from silicon nitride or silicon oxide, and the preparation material of the organic layer is selected from polyimide or the like. The encapsulation layer 40 can also be a glass encapsulation cover plate.

[0048] The polarizer 60 is used to reduce the reflectivity of ambient light in the touch display device to improve the contrast when the touch display device is displaying. The protective cover plate 70 is used to protect film layers such as the polarizer 60. The protective cover plate 70 is a transparent polyimide layer, or the protective cover plate 70 is a glass protective cover plate.

[0049] Please refer to Figures 2 - 4 , Figure 2 which is a schematic diagram of the driving architecture of the touch layer of the touch display device of this application, Figure 3 is Figure 2 the first schematic diagram of the touch unit shown, Figure 4 is for a plurality of Figure 3 schematic diagram of the touch unit array arrangement shown.

[0050] The touch layer 50 includes a plurality of first touch electrodes 501 electrically connected in a first direction and a plurality of second touch electrodes 502 electrically connected in a second direction. The first touch electrodes 501 and the second touch electrodes 502 are electrically insulated from each other, and the first direction is perpendicular to the second direction. A plurality of first touch electrodes 501 that are electrically connected in the first direction and arranged in the same row form a first touch electrode channel, and a plurality of first touch electrode channels are arranged along the second direction. A plurality of second touch electrodes 502 that are electrically connected in the second direction and arranged in the same row form a second touch electrode channel, and a plurality of second touch electrode channels are arranged along the first direction.

[0051] The size of the touch layer 50 in the first direction is greater than the size of the touch layer 50 in the second direction. The number of first touch electrodes 501 on each first touch electrode channel is greater than the number of second touch electrodes 502 on each second touch electrode channel. The impedance of each first touch electrode channel is greater than the impedance of each second touch electrode channel. Both ends of each first touch electrode channel are connected to the touch chip through a first lead 503, and one end of each second touch electrode channel is connected to the touch chip through a second lead 504. In this embodiment, the touch layer adopts a 2T1R architecture to reduce the load required for the touch chip to drive each first touch electrode channel, which can effectively improve the sensing frequency and the touch reporting rate.

[0052] As Figure 2 and Figure 4 shown, the touch layer includes a plurality of touch units 505 arranged in an array. Each touch unit 505 is square. As Figure 3 shown, each touch unit 505 includes a first touch electrode 501 and a second touch electrode 502, and the second touch electrode 502 in the same touch unit 505 surrounds the first touch electrode 501.

[0053] As Figure 5 shown, it is a schematic diagram of the first touch electrode of the touch unit as Figure 3 shown. The first touch electrode 501 is arranged in the first direction. The first touch electrode 501 includes a first main electrode 5011 arranged in the first direction and at least one first branch electrode 5012, and at least one first branch electrode 5012 is electrically connected to the first main electrode 5011.

[0054] One end of the first branch electrode 5012 is electrically connected to the intersection of the first main electrode 5011 and the second main electrode 5021, and the included angle α between the first branch electrode 5012 and the first main electrode 5011 satisfies 0° < α < 90°. For example, the included angle α is 30 degrees, 50 degrees, 60 degrees, and 80 degrees. Specifically, the included angle α between the first branch electrode 5012 and the first main electrode 5011 is 45 degrees. Two first branch electrodes 5012 extend from one end of the intersection of the first main electrode 5011 and the second main electrode 5021, and the two first branch electrodes 5012 are symmetrically arranged with respect to the first main electrode 5011.

[0055] Each first main electrode 5011 includes a plurality of first widening portions 50111 and a first connecting portion 50112 electrically connected to the first widening portions 50111. The width of the first widening portion 50111 of each first main electrode 5011 near the first branch electrode 5012 extending from the first main electrode 5011 is smaller than the width of the first widening portion 50111 of the part far from the first branch electrode 5012 extending from the first main electrode 5011, so as to adapt to the distance between the first widening portion 50111 near the first branch electrode 5012 and the first branch electrode 5012 being smaller than the distance between the first widening portion 50111 far from the first branch electrode 5012 and the first branch electrode 5012, and to prevent the distance between the first branch electrode 5012 and the first main electrode 5011 from being too small, which may cause the second branch electrode 5022 located between the first branch electrode 5012 and the first main electrode 5011 to be disconnected from other second branch electrodes 5022, resulting in a decrease in the mutual capacitance between the first touch electrode 501 and the second touch electrode 502.

[0056] In this embodiment, each second branch electrode 5022 surrounds one side of the first main electrode 5011. The part of the first widening portion 50111 corresponding to the first widening portion 50111 of the second branch electrode 5022 is engaged with each other, and the part of the first connecting portion 50112 corresponding to the first connecting portion 50112 of the second branch electrode 5022 is engaged with each other, so as to increase the intersection boundary between the first main electrode 5011 and the second branch electrode 5022, thereby further increasing the mutual capacitance between the first touch electrode 501 and the second touch electrode 502. The first widening portion 50111 is diamond-shaped. The first main electrode 5011 is not hollowed out. Since the impedance of each first touch electrode channel is determined by the impedance of the first main electrode 5011 along the longitudinal axis, no hollowing out is performed inside the first main electrode 5011 to minimize the impedance of the first touch electrode.

[0057] As Figure 6 shown, it is Figure 3Schematic diagram of a second touch electrode of a touch control unit shown. The second touch electrode 502 is arranged along the second direction. The second touch electrode 502 includes a second trunk electrode 5021, at least one second branch electrode 5022, and at least one first connection branch electrode 5023 arranged along the second direction. One end of the second branch electrode 5022 is electrically connected to the second trunk electrode 5021, and both ends of the first connection branch electrode 5023 are electrically connected to the second branch electrode 5022 and the second trunk electrode 5021, respectively, and the second branch electrode 5022 surrounds the corresponding first branch electrode 5012.

[0058] Compared with the conventional technology, by adding a first connecting branch electrode 5023 between the second branch electrode 5022 and the second main electrode 5021, the transmission channel of the current on the second touch electrode 502 is increased, and the resistance of the second touch electrode 502 in the touch unit 505 is reduced, thereby reducing the resistance of the entire second touch electrode channel, which is beneficial to improving the touch reporting rate. In addition, the second branch electrode 5022 surrounds the first branch electrode 5012 to increase the mutual capacitance between the first touch electrode 501 and the second touch electrode 502, so as to improve the touch sensitivity and further improve the touch performance.

[0059] One end of the second branch electrode 5022 is electrically connected to the intersection of the second trunk electrode 5021 and the first trunk electrode 5011, and the angle β between the second branch electrode 5022 and the second trunk electrode 5021 satisfies 0°<β<90°, for example, the angle β is 30 degrees, 40 degrees, 50 degrees and 80 degrees. Specifically, the angle between the second branch electrode 5022 and the second trunk electrode 5021 is 45 degrees.

[0060] In this embodiment, the first branch electrode 5012 includes a plurality of second widened portions 50121 and a second connecting portion 50122 electrically connected to the second widened portions 50121, and the second branch electrode 5022 surrounds the corresponding second widened portions 50121 and the second connecting portion 50122. The second branch electrode 5022 surrounds the first branch electrode 5012, so that there is a long boundary between the second branch electrode 5022 and the first branch electrode 5012, the mutual capacitance induction between the first branch electrode 5012 and the second branch electrode 5022 is large, and the mutual capacitance electric field line distribution is more uniform, which is more conducive to improving the resolution and accuracy of detecting the touch position, and the second widened portion 50121 of the first branch electrode 5012 and the second connecting portion 50122 are engaged with the second branch electrode 5022, so as to further increase the boundary between the first branch electrode 5012 and the second branch electrode 5022, thereby further increasing the mutual capacitance induction between the first touch electrode 501 and the second touch electrode 502.

[0061] In this embodiment, the shape of each second widening portion 50121 is rectangular. A plurality of second widening portions 50121 can increase the mutual capacitance between the first branch electrode 5012 and the second branch electrode 5022 more than a single second widening portion 50121. When the shape of each second widening portion 50121 is rectangular as compared to when the shape of each second widening portion 50121 is square, more second widening portions 50121 can be arranged on each first branch electrode 5012, which can further increase the mutual capacitance between the first branch electrode 5012 and the second branch electrode 5022. The number of the second widening portions 50121 is greater than two, and a second widening portion 50121 is arranged at the top end of the first branch electrode 5012 away from the first main electrode 5011. The first branch electrode 501 surrounds at least two sub-pixels along the width direction of the first branch electrode 5012.

[0062] In this embodiment, the first touch electrode 501 is symmetrically arranged with respect to the first main electrode 5011 and the second main electrode 5021, and the second touch electrode 502 is symmetrically arranged with respect to the first main electrode 5011 and the second main electrode 5021. In the same touch unit 505, the first main electrodes 5011 on both sides of the intersection of the first main electrode 5011 and the second main electrode 5021 are connected by a third connecting portion 5013, and the second main electrodes 5021 on both sides of the intersection of the first main electrode 5011 and the second main electrode 5021 are connected by a fourth connecting portion 5025. The third connecting portion 5013 and the first main electrode 5011 are continuously formed. The fourth connecting portion 5025 is composed of two non-adjacent connecting bridges, and the third connecting portion 5013 and the fourth connecting portion 5025 are insulated from each other.

[0063] In this embodiment, in the first region surrounded by the corresponding first connecting branch electrode 5023, the second main electrode 5021, and the second branch electrode 5022 in the same touch unit 505, a first hollow portion 502a is arranged. By arranging the first hollow portion 502a in the first region, the parasitic capacitance between the second touch electrode 502 and the common cathode is reduced. The shape of the first hollow portion 502a is triangular. The first hollow portion 502a is arranged along the edge of the second main electrode 5021 parallel to the second direction.

[0064] In this embodiment, the second touch electrode 502 further includes a second connecting branch electrode 5024. One end of the second connecting branch electrode 5024 is electrically connected to the corresponding second branch electrode 5022, and the other end thereof is connected to one end of an adjacent second connecting branch electrode 5024 in an adjacent touch unit 505 in the second direction, so as to increase the transmission channel of current between the two second touch electrodes 502 in the adjacent two touch units 505, reduce the impedance of the second touch electrode channel, and thus improve the touch reporting rate.

[0065] In the second region surrounded by the corresponding second connection branch electrodes 5024 and the second branch electrodes 5022 in two adjacent touch units 505 in the second direction, a second hollow portion 502b is provided. By providing the second hollow portion 502b, the parasitic capacitance between the second touch electrode 502 and the common cathode is further reduced, and the influence of the parasitic capacitance on the touch performance is reduced. The second hollow portion 502b is diamond-shaped.

[0066] In this embodiment, one end of the second branch electrode 5022 away from the connection end of the second branch electrode 5022 and the second main electrode 5021 is electrically connected to one end of the corresponding second branch electrode 5022 in the adjacent touch unit 505 in the second direction, so that the second branch electrodes 5022 in two adjacent touch units 505 are continuously conducted, the resistance of the second touch electrode channel is reduced, and thus the touch reporting rate is improved.

[0067] In this embodiment, in the third region surrounded by the corresponding first connection branch electrode 5023, the second connection branch electrode 5024, the second main electrode 5021, and the second branch electrode 5022 in the same touch unit 505, a third hollow portion 502c is provided. By adding the third hollow portion 502c, the parasitic capacitance between the second touch electrode 502 and the common cathode is further reduced.

[0068] In this embodiment, the first hollow portion 502a, the second hollow portion 502b, and the third hollow portion 502c are spaced apart from each other and arranged in parallel. While reducing the parasitic capacitance of the second touch electrode 502, the first connection branch electrode 5023 between the first hollow portion 502a and the third hollow portion 502c is retained, and the second connection branch electrode 5024 between the second hollow portion 502b and the third hollow portion 502c is retained, increasing the distribution area of the branch electrodes of the second touch electrode 502, increasing the uniformity of the mutual capacitance distribution when the first touch electrode 501 and the second touch electrode 502 are touched, and avoiding the inability to form a mutual capacitance in this area due to excessive local hollowing. In addition, the first hollow portion 502a, the second hollow portion 502b, and the third hollow portion 502c are located on one side of the first main electrode 5021. Compared with the case where the hollow portion is provided on the second main electrode 5021, which will increase the impedance of the second main electrode 5021 and affect the touch performance, setting the hollow portion in the local area of the branch electrode of the second touch electrode 502 reduces the parasitic capacitance of the second touch electrode 502 while avoiding the risk of increasing the impedance of the second touch electrode channel.

[0069] In this embodiment, in a fourth region surrounded by a corresponding second branch electrode 5022 and a first main electrode 5011 in two adjacent touch units 505 along the first direction, a fourth hollow portion 502d is provided, and a fourth virtual electrode 5064 is provided in the fourth hollow portion 502d. The fourth virtual electrode 5064 surrounds at least one sub-pixel in the first direction to prevent the second touch electrode 502 from being short-circuited in the first direction.

[0070] In this embodiment, the first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, and the fourth virtual electrode 5064 are all electrically insulated from the first touch electrode 501 and the second touch electrode 502. Moreover, the first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, the fourth virtual electrode 5064, the first touch electrode 501, and the second touch electrode 502 are all composed of a metal grid of the same layer. The first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, the fourth virtual electrode 5064 are disconnected from the first touch electrode 501 and the second touch electrode 502 through the metal grid to achieve electrical insulation. As Figure 7 shown, it is a second schematic diagram of the touch unit according to the embodiment of the present application. The first virtual electrode 5061 is disposed in the first hollow portion 502a, the second virtual electrode 5062 is disposed in the second hollow portion 502b, the third virtual electrode 5063 is disposed in the third hollow portion 502c, and the fourth virtual electrode 5064 is disposed in the fourth hollow portion 502d. The first virtual electrode 5061, the second virtual electrode 5062, the third virtual electrode 5063, and the fourth virtual electrode 5064 are all used to improve the optical uniformity when light passes through the touch layer. Moreover, the fourth virtual electrode 5064 is used to electrically insulate the second touch electrodes 502 of two adjacent touch units 505 in the first direction.

[0071] In this embodiment, one end of the second branch electrode 5022 away from the second main electrode 5021 is insulated from one end of an adjacent second branch electrode in an adjacent touch unit 505 along the first direction to prevent the second branch electrode 5022 from being short-circuited in the first direction.

[0072] In this embodiment, the first connection branch electrode 5023 is disposed corresponding to the second widened portion 50121 of the first branch electrode 5012 adjacent to the first connection branch electrode 5023, and the second connection branch electrode 5024 is disposed corresponding to the second widened portion 50121 of the first branch electrode 5012 adjacent to the second connection branch electrode 5024, so as to form mutual capacitances between the first connection branch electrode 5023 and the second widened portion 50121 of the corresponding first branch electrode 5012, and between the second connection branch electrode 5024 and the second widened portion 50121 of the corresponding first branch electrode 5012.

[0073] The first hollow portion 502a is disposed corresponding to the second connection portion 50122 of the adjacent first branch electrode 5012, and the third hollow portion 502c is disposed corresponding to the second connection portion 50122 of the adjacent second branch electrode 5012, so that the second branch electrode 5022 forms a mutual capacitance with the second connection portion 50122 for the portion between the first hollow portion 502a and the second connection portion 50122 of the adjacent first branch electrode 5012, and the second branch electrode 5022 forms a mutual capacitance with the second connection portion 50122 for the portion between the third hollow portion 502c and the second connection portion 50122 of the adjacent first branch electrode 5012.

[0074] The portion of the second branch electrode 5022 corresponding to the first hollow portion 502a, the second hollow portion 502b, and the third hollow portion 502c and between the first branch electrode 5012 surrounds two to three sub-pixels in the width direction of the second branch electrode 5022, and the redundant second branch electrode 5022 is removed to reduce the parasitic capacitance of the second touch electrode 502, achieving a balance between increasing the mutual capacitance between the first touch electrode 501 and the second touch electrode 502 and reducing the parasitic capacitance of the second touch electrode 502.

[0075] In this embodiment, the first touch electrode 501 and the second touch electrode 502 are composed of a metal grid. The preparation material of the metal grid is selected from at least one of Ti, Al, Mo, Ag, and Au. The orthographic projection of the metal grid on the plane where the sub-pixels are located is located at the periphery of the sub-pixels. It can be understood that the preparation material of the first touch electrode 501 and the second touch electrode 502 can also be indium tin oxide. When the preparation material of the first touch electrode 501 and the second touch electrode 502 is indium tin oxide, the first touch electrode 501 and the second touch electrode 502 are patterned indium tin oxide layers.

[0076] As Figure 8A shown, it is the first schematic diagram of the metal grid surrounding the sub-pixels. This design is applicable to the design where the edges of the sub-pixels are straight lines, such as the sub-pixels are rectangular, diamond-shaped, etc. Correspondingly, the metal grid is also straight-line type. The rectangular, diamond-shaped, etc. sub-pixels are surrounded by square metal grids, and one metal grid surrounds one sub-pixel. Since the arrangement design of the sub-pixels is a 45-degree inclination design, in order to avoid the metal grid blocking the light emitted by the sub-pixels, the metal wires forming the metal grid also need to be designed with a 45-degree inclination.

[0077] As Figure 8BAs shown, it is the second schematic diagram of a metal grid surrounding sub-pixels. This design is applicable to the design where the edges of the sub-pixels are arc-shaped, such as elliptical sub-pixels and quadrilaterals with indented arc-shaped edges. The elliptical sub-pixels are surrounded by elliptical metal grids, and the quadrilateral with indented arc-shaped edges is surrounded by octagonal metal grids. Four elliptical sub-pixels surround a quadrilateral sub-pixel with indented arc-shaped edges.

[0078] Through simulation, the mutual capacitance of the touch unit composed of the first touch electrode 501 and the second touch electrode 502 in this embodiment applied to a non-foldable touch display device is 0.07 picofarads. Each first touch electrode 501 only extends the first branch electrode 5012 at both ends of one end of the first main electrode 5011, making the touch electrodes composed of the first touch electrode 501 and the second touch electrode 502 more suitable for non-foldable touch display devices with flat or curved surfaces. The touch electrodes with more than two first branch electrodes extending from one side of each first main electrode are only suitable for dynamically foldable screens. The relatively large module thickness of non-foldable touch display devices is partly the reason why the touch electrodes with more than two first branch electrodes extending from one side of each first main electrode are not suitable for non-foldable touch display devices with flat or curved surfaces. In addition, the design solution of the touch component in this application can, on the premise of increasing the signal volume during finger touch, avoid the decrease in the sensing frequency of the touch screen caused by the over-large resistance-capacitance delay (RC Delay) of the touch screen, which leads to insufficient charging of the touch electrodes, thus avoiding the impact on key touch performance indicators such as the reporting rate.

[0079] The description of the above embodiments is only used to help understand the technical solutions and their core ideas of this application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A touch component, characterized in that, The touch component includes a touch layer, and the touch layer includes a plurality of touch units. Each touch unit includes: A first touch electrode arranged in a first direction. The first touch electrode includes a first main electrode arranged in the first direction and at least one first branch electrode. One end of the first branch electrode is electrically connected to the first main electrode. A second touch electrode arranged in a second direction. The second touch electrode includes a second main electrode arranged in the second direction, at least one second branch electrode, and at least one first connection branch electrode. One end of the second branch electrode is electrically connected to the second main electrode. The two ends of the first connection branch electrode are respectively electrically connected to the second branch electrode and the second main electrode. The second branch electrode surrounds the corresponding first branch electrode. The first direction is different from the second direction. In a first area surrounded by the corresponding first connection branch electrode, the second main electrode, and the second branch electrode in the same touch unit, a first hollow portion is provided, and a first virtual electrode is provided in the first hollow portion. The first hollow portion is arranged along the edge of the second main electrode parallel to the second direction.

2. The touch component according to claim 1, characterized in that, The first touch electrode and the second touch electrode include a metal grid, or the first touch electrode and the second touch electrode include indium tin oxide.

3. The touch component according to claim 1, characterized in that, The second touch electrode further includes a second connection branch electrode. One end of the second connection branch electrode is electrically connected to the corresponding second branch electrode, and the other end is electrically connected to one end of the second connection branch electrode in a touch unit adjacent in the second direction.

4. The touch component according to claim 3, characterized in that, In a second area surrounded by the corresponding second connection branch electrode and the second branch electrode in two touch units adjacent in the second direction, a second hollow portion is provided, and a second virtual electrode is provided in the second hollow portion.

5. The touch component according to claim 4, characterized in that, One end of the second branch electrode far from the end where the second branch electrode is connected to the second main electrode is electrically connected to one end of the corresponding second branch electrode in a touch unit adjacent in the second direction.

6. The touch component according to claim 3, characterized in that, In a third area surrounded by the corresponding first connection branch electrode, second connection branch electrode, second main electrode, and second branch electrode in the same touch unit, a third hollow portion is provided, and a third virtual electrode is provided in the third hollow portion.

7. The touch component according to claim 1, characterized in that, In a fourth area surrounded by the corresponding second branch electrode and the first main electrode in two touch units adjacent in the first direction, a fourth hollow portion is provided, and a fourth virtual electrode is provided in the fourth hollow portion.

8. The touch component according to claim 7, characterized in that, One end of the second branch electrode far from the second main electrode is insulated from one end of the adjacent second branch electrode in a touch unit adjacent in the first direction.

9. The touch component according to claim 1, characterized in that, The first main electrode includes a plurality of first widening portions and a first connection portion electrically connected to the first widening portions. The first branch electrode includes a plurality of second widening portions and a second connection portion electrically connected to the second widening portions. The second branch electrode surrounds the corresponding second widening portions and the second connection portion.

10. The touch component according to claim 9, characterized in that, The width of the upper part of each of the first main electrodes near the first widening part of the first branch electrode extending from the first main electrode is smaller than the width of the first widening part of the first branch electrode extending away from the first main electrode.

11. The touch component according to claim 9, characterized in that, The first connection branch electrode is arranged corresponding to the second widening part of the first branch electrode adjacent to the first connection branch electrode.

12. The touch component according to claim 1, characterized in that, One end of the first branch electrode is electrically connected to the intersection of the first main electrode and the second main electrode, and the included angle α between the first branch electrode and the first main electrode satisfies 0° < α < 90°; One end of the second branch electrode is electrically connected to the intersection of the second main electrode and the first main electrode, and the included angle β between the second branch electrode and the second main electrode satisfies 0° < β < 90°.

13. The touch component according to claim 12, characterized in that, The first direction is perpendicular to the second direction, the included angle α between the first branch electrode and the first main electrode is 45°, and the included angle β between the second branch electrode and the second main electrode is 45°.

14. The touch component according to claim 1, characterized in that, The first touch electrode and the second touch electrode are respectively mirror-symmetric about the first main electrode and the second main electrode at the same time.

15. The touch component according to claim 1, characterized in that, The first main electrodes on both sides of the intersection of the first main electrode and the second main electrode are connected by a third connection part; The second main electrodes on both sides of the intersection of the first main electrode and the second main electrode are connected by a fourth connection part; The fourth connection part is two unconnected connection bridges, and the third connection part and the fourth connection part are insulated from each other.

16. A touch display device, characterized in that, The touch display device includes the touch component according to any one of claims 1-15 and a display panel. The touch component is located on one side of the display panel. The display panel includes an organic light-emitting diode array layer and a packaging layer. The packaging layer is located between the organic light-emitting diode array layer and the touch component.

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