Touch sensor and display device

Abstract

Embodiments of the present application disclose a touch sensor and a display device. The touch sensor comprises a plurality of touch units; each touch unit comprises a first touch electrode and a second touch electrode which are arranged separately from each other; the touch unit further comprises a dummy electrode, wherein the dummy electrode is arranged separately from the first touch electrode and the second touch electrode, and in a plan view of the touch unit, the area of the dummy electrode accounts for greater than 27% and less than or equal to 40% of the total area of the touch unit.

Description

Touch sensor and display device

[0001] This application claims priority to Chinese Patent Application No. 202410990794.4, filed on July 23, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present application relates to the technical field of display, in particular to a touch sensor and a display device. BACKGROUND

[0003] In the related art, the demand for folding performance of an organic light-emitting folding mobile phone is very high. In order to improve the folding performance, the thickness of the organic encapsulation layer is usually reduced. However, the reduction of the thickness of the organic encapsulation layer will increase the load of the touch sensor, thereby reducing the touch performance. SUMMARY

[0004] The embodiments of the present application provide a touch sensor and a display device, which can reduce the load of the touch sensor while maintaining the touch performance requirements.

[0005] In one aspect, the embodiments of the present application provide a touch sensor, comprising:

[0006] a plurality of touch units, the plurality of touch units are arranged along a first direction and a second direction, the first direction intersects the second direction, a touch unit comprises a first touch electrode and a second touch electrode arranged separately from each other, the first touch electrode is one of a drive electrode and a sense electrode, and the second touch electrode is the other of the drive electrode and the sense electrode;

[0007] The touch unit further comprises a dummy electrode, the dummy electrode is arranged separately from the first touch electrode and the second touch electrode, and in a plan view of the touch unit, the area percentage of the dummy electrode in the total area of the touch unit is greater than 27% and less than or equal to 40%.

[0008] In another aspect, the embodiments of the present application further provide a display device, comprising a display panel and the touch sensor of any one of the above embodiments, the touch sensor is arranged on the light-emitting side of the display panel.

[0009] The display panel comprises a plurality of sub-pixels, the first touch electrode and the second touch electrode are both in a grid shape, the mesh of the first touch electrode and the second touch electrode corresponds to the sub-pixel, and the plurality of touch units are located in the display area of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is a plan view of a touch sensor according to an embodiment of the present application.

[0011] Fig. 2 is a plan view of a touch unit of the touch sensor according to an embodiment of the present application;

[0012] Fig. 3 is a sectional view of the touch sensor according to an embodiment of the present application;

[0013] Fig. 4 is a plan view of a first touch electrode of the touch unit of the touch sensor according to an embodiment of the present application;

[0014] Fig. 5 is a plan view of a second touch electrode of the touch unit of the touch sensor according to an embodiment of the present application;

[0015] Fig. 6 is an enlarged view of portion A in Fig. 2;

[0016] Fig. 7 is a plan view of a display device according to an embodiment of the present application;

[0017] Fig. 8 is a plan view of a touch unit region of the display device according to an embodiment of the present application;

[0018] Fig. 9 is an enlarged view of portion B in Fig. 8;

[0019] Fig. 10 is a sectional view of the display device according to an embodiment of the present application. Embodiments of the present application

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the embodiments can be combined with each other but are not described one by one, and the positional words such as "upper" and "lower" are generally used to refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing surface in the drawings; and "inner" and "outer" are used in relation to the outline of the device; the words "first", "second", "third" and the like are only used as labels, and do not impose a numerical requirement or establish an order.

[0021] The embodiments of the present application provide a touch sensor, which comprises:

[0022] a plurality of touch units, the plurality of touch units are arranged along a first direction and a second direction, the first direction intersects the second direction, one touch unit comprises a first touch electrode and a second touch electrode which are arranged separately, the first touch electrode is one of a driving electrode and a sensing electrode, and the second touch electrode is the other of the driving electrode and the sensing electrode;

[0023] In some embodiments of the present application, the touch unit further comprises a dummy electrode, the dummy electrode is arranged separately from the first touch electrode and the second touch electrode, and in a plan view of the touch unit, the area percentage of the dummy electrode in the total area of the touch unit is greater than 27% and less than or equal to 40%.

[0024] Optionally, in some embodiments of the present application, in one touch unit, the first touch electrode comprises a first trunk electrode, a second trunk electrode and a bridge portion, the first trunk electrode and the second trunk electrode are connected by the bridge portion, the bridge portion is arranged in a different layer from the second touch electrode, and the second touch electrode comprises a third trunk electrode.

[0025] In a plan view of the touch sensor, the first trunk electrode and the second trunk electrode extend along a first direction, the third trunk electrode extends along a second direction, the first direction intersects the second direction, the first trunk electrode is located on one side of the third trunk electrode, and the second trunk electrode is located on the other side of the third trunk electrode; the first trunk electrode, the second trunk electrode and the third trunk electrode define a first region, a second region, a third region and a fourth region, and the first region, the second region, the third region and the fourth region are provided with the dummy electrode.

[0026] Optionally, in some embodiments of the present application, the first touch electrode further comprises a first connection electrode and at least two first branch electrodes located in the first region, the first branch electrodes extend along a third direction, the third direction intersects the first direction and the second direction respectively, the first connection electrode connects at least two first branch electrodes, and one of the at least two first branch electrodes is connected to the first trunk electrode.

[0027] The second touch electrode further comprises a second connection electrode and at least two second branch electrodes located in the first region, the second branch electrodes extend along the third direction, the second connection electrode connects at least two second branch electrodes, and one of the at least two second branch electrodes is connected to the third trunk electrode.

[0028] The portions of two adjacent first branch electrodes and the first connecting electrode surround a side of one second branch electrode, and the portions of two adjacent second branch electrodes and the second connecting electrode surround a side of one first branch electrode.

[0029] The dummy electrodes include a first dummy electrode and a second dummy electrode, the first branch electrodes and the second branch electrodes are alternately arranged to form first branch units in a direction perpendicular to the third direction, the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes, and the second dummy electrode is arranged on an outer circumferential side of the first branch units.

[0030] Optionally, in some embodiments of the present application, one side of the first branch electrode facing the second branch electrode is formed with a first protrusion, a first groove is formed between two adjacent first protrusions, one side of the second branch electrode facing the first branch electrode is formed with a second protrusion, a second groove is formed between two adjacent second protrusions, a part of the first protrusion is arranged in the second groove, and a part of the second protrusion is arranged in the first groove.

[0031] Optionally, in some embodiments of the present application, the first dummy electrode is arranged along the side edge profile of the first branch electrode.

[0032] Optionally, in some embodiments of the present application, one of the at least two first branch electrodes close to the first main electrode is connected to the first main electrode through the first protrusion, and one of the at least two second branch electrodes close to the third main electrode is connected to the third main electrode through the second protrusion.

[0033] Optionally, in some embodiments of the present application, a first hollow opening is further arranged on the first branch electrode, the first hollow opening is located in the first protrusion, the dummy electrodes further include a third dummy electrode, and the third dummy electrode is arranged in the first hollow opening.

[0034] Optionally, in some embodiments of the present application, a second hollow opening is further arranged on the second branch electrode, the second hollow opening is located in the second protrusion, the dummy electrodes further include a fourth dummy electrode, and the fourth dummy electrode is arranged in the second hollow opening.

[0035] Optionally, in some embodiments of the present application, in a plan view of the touch control unit, the pattern of the touch control unit located in the third area and the pattern of the touch control unit located in the first area are symmetrically arranged about a middle axis of the first stem electrode, and the pattern of the touch control unit located in the first area and the third area and the pattern of the touch control unit located in the second area and the fourth area are symmetrically arranged about a middle axis of the third stem electrode.

[0036] Optionally, in some embodiments of the present application, the first touch control electrode and the second touch control electrode are arranged in the same layer, the third stem electrode comprises a first stem portion, a stem connecting portion and a second stem portion connected in sequence along the second direction, the first stem portion is located on one side of the first stem electrode, and the second stem portion is located on the other side of the first stem electrode.

[0037] The bridge portion is provided with a first opening, and in a plan view of the touch control unit, the stem connecting portion is arranged in the first opening.

[0038] Optionally, in some embodiments of the present application, a portion of the first stem portion close to the stem connecting portion is provided with a second opening, and a portion of the second stem portion close to the stem connecting portion is provided with a third opening.

[0039] In a plan view of the touch control unit, the second opening and the third opening both expose a part of the stem connecting portion.

[0040] Optionally, in some embodiments of the present application, a plurality of the touch control units are arranged in a row along the first direction, in a row of the touch control units, the first stem electrode and the second stem electrode are alternately and sequentially arranged, and a plurality of the touch control units are arranged in a column along the second direction, in a column of the touch control units, a plurality of the third stem electrodes are alternately and sequentially arranged.

[0041] Correspondingly, the present application also provides a display device comprising a display panel and the touch sensor of any one of the above embodiments, wherein the touch sensor is arranged on the light-emitting side of the display panel.

[0042] The display panel comprises a plurality of sub-pixels, the first touch control electrode and the second touch control electrode are both grid-shaped, the meshes of the first touch control electrode and the second touch control electrode correspond to the sub-pixels, and a plurality of the touch control units are located in the display area of the display panel.

[0043] Optionally, in some embodiments of the present application, the display panel comprises a light emitting device layer and an encapsulation layer, the encapsulation layer is arranged on the light emitting side of the light emitting device layer, the touch sensor is arranged on the side of the encapsulation layer away from the light emitting device layer, and the encapsulation layer comprises a first inorganic layer, an organic layer and a second inorganic layer arranged in sequence.

[0044] The thickness of the organic layer is less than or equal to 8 microns.

[0045] Optionally, in some embodiments of the present application, in a touch unit, the first touch electrode comprises a first trunk electrode, a second trunk electrode and a bridge portion, the first trunk electrode and the second trunk electrode are connected through the bridge portion, the bridge portion is arranged in a layer different from the second touch electrode, and the second touch electrode comprises a third trunk electrode.

[0046] In a plan view of the touch sensor, the first trunk electrode and the second trunk electrode extend along a first direction, the third trunk electrode extends along a second direction, the first direction intersects the second direction, the first trunk electrode is located on one side of the third trunk electrode, and the second trunk electrode is located on the other side of the third trunk electrode; the first trunk electrode, the second trunk electrode and the third trunk electrode define a first region, a second region, a third region and a fourth region, and the first region, the second region, the third region and the fourth region are all provided with the dummy electrode.

[0047] The first touch electrode further comprises a first connecting electrode and at least two first branch electrodes in the first region, the first branch electrodes extend along a third direction, the third direction intersects the first direction and the second direction respectively, the first connecting electrode connects at least two first branch electrodes, and one of the at least two first branch electrodes is connected to the first trunk electrode.

[0048] The second touch electrode further comprises a second connecting electrode and at least two second branch electrodes in the first region, the second branch electrodes extend along the third direction, the second connecting electrode connects at least two second branch electrodes, and one of the at least two second branch electrodes is connected to the third trunk electrode.

[0049] The part of the adjacent two first branch electrodes and the first connecting electrode is arranged around the periphery of one second branch electrode, and the part of the adjacent two second branch electrodes and the second connecting electrode is arranged around the periphery of one first branch electrode.

[0050] The dummy electrode includes a first dummy electrode, in a direction perpendicular to the third direction, the first branch electrode and the second branch electrode are alternately arranged to form a first branch unit, and the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes.

[0051] In a direction perpendicular to the third direction, the first dummy electrode at least spans one of the sub-pixels.

[0052] Optionally, in some embodiments of the present application, the display device further includes a cover plate arranged on the side of the touch sensor away from the display panel, the cover plate includes at least two film layers stacked, and the thickness of the cover plate is less than or equal to 500 microns.

[0053] The touch sensor of the embodiments of the present application can reduce the area ratio of the touch electrode by increasing the area ratio of the dummy electrode, thereby reducing the load of the touch sensor while maintaining the touch performance requirements.

[0054] The embodiments of the present application provide a touch sensor and a display device, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments.

[0055] It should be noted that, based on the description of the background art, due to the reduction of the thickness of the organic encapsulation layer, the coupling capacitance between the touch electrode and the cathode becomes larger. This coupling capacitance causes the resistance-capacitance (RC-Delay) of the driving electrode far from the output signal end of the driving chip to be larger, and causes the sensing frequency (Sensing Frequency) of the driving electrode / sensing electrode driving signal waveform to decrease significantly, resulting in larger touch load and reduced key performance such as touch report rate.

[0056] The touch sensor of the embodiments of the present application reduces the area ratio of the touch electrode in the touch unit by increasing the area ratio of the dummy electrode in the touch unit, thereby reducing the coupling capacitance between the touch electrode and the cathode, and achieving the reduction of the load and the improvement of the touch report rate.

[0057] Please refer to FIG. 1-FIG. 3, according to the touch sensor 100 of the embodiments, the touch sensor 100 can be applied to a display panel, such as can be attached to the display panel by external hanging, or can be formed on or in the display panel by integrated manner. The touch sensor 100 includes a plurality of touch units Tu, and the touch unit Tu can include a plurality of touch electrodes, which are configured to be able to sense the touch of a user by using capacitive sensing of the touch electrodes.

[0058] In FIGS. 1-3, the first direction F1 can be a direction parallel to one side of the touch sensor 100 in a plan view, and can be, for example, a lateral direction of the touch sensor 100. The second direction F2 can be a direction parallel to the other side of the touch sensor 100 in a plan view, and can be a longitudinal direction of the touch sensor 100. That is, the first direction F1 is perpendicular to the second direction F2. However, in some embodiments, the first direction F1 and the second direction F2 can also intersect non-perpendicularly.

[0059] The touch sensor 100 can have a rectangular shape or a square shape in a plan view, but embodiments are not limited thereto. In some embodiments, the touch sensor 100 can have a rectangular shape with right angles or rounded corners in a plan view. The touch sensor 100 can include two short sides arranged in the first direction F1 and two long sides arranged in the second direction F2 in a plan view.

[0060] It is to be understood that, referring to FIG. 3, the touch sensor 100 is driven by a driving device Qd. The driving device Qd can be a touch chip.

[0061] The driving device Qd can be electrically and physically connected to the touch unit Tu. The driving device Qd can provide a touch driving signal to the plurality of touch electrodes in the touch unit Tu, and can sense a change in capacitance between the plurality of touch electrodes. Based on the amount of change in capacitance between the touch electrodes, the driving device Qd can determine whether a user's touch is input and can generate touch coordinate data.

[0062] The driving device Qd is mounted on a circuit board DL and electrically connects the touch sensor 100 through the circuit board DL, but is not limited thereto, for example, the driving device Qd can be integrated on a display panel.

[0063] In one or more embodiments of the present application, the touch sensor 100 includes a touch area TP and a non-touch area NTP, the non-touch area NTP being disposed outside the touch area TP.

[0064] The plurality of touch units Tu are disposed in the touch area TP. The plurality of touch units Tu are arranged along the first direction F1 and the second direction F2.

[0065] The touch sensor 100 further includes a first signal line xh1 and a second signal line xh2 in the non-touch area NTP, one end of the first signal line xh1 being connected to a first touch channel formed by the first touch electrode Tx, and the other end of the first signal line xh1 being connected to the driving device Qd. One end of the second signal line xh2 is connected to a second touch channel formed by the second touch electrode Rx, and the other end of the second signal line xh2 is connected to the driving device Qd.

[0066] A touch unit Tu includes a first touch electrode Tx and a second touch electrode Rx which are arranged separately from each other, the first touch electrode Tx is one of a driving electrode and a sensing electrode, and the second touch electrode Rx is the other of the driving electrode and the sensing electrode.

[0067] Optionally, the plurality of touch units Tu are arranged into a touch unit row along a first direction F1, and the plurality of touch units Tu are arranged into a touch unit column along a second direction F2. The first direction F1 intersects the second direction F2.

[0068] The touch unit Tu further includes a dummy electrode Dx which is arranged separately from the first touch electrode Tx and the second touch electrode Rx. In a plan view of the touch unit Tu, a percentage of an area of the dummy electrode Dx to a total area of the touch unit Tu is greater than 27% and less than or equal to 40%.

[0069] It should be understood that the area of a feature refers to an area occupied by the feature in a plan view. For example, if the dummy electrode Dx is a grid pattern, the area of the dummy electrode Dx is the sum of the areas of the grid lines and the grid holes.

[0070] Secondly, the lower the percentage of the area of the dummy electrode Dx to the total area of the touch unit Tu, the greater the percentage of the area of the touch electrode (the first touch electrode Tx and the second touch electrode Rx), and the greater the load and the touch area of the touch control. The higher the percentage of the area of the dummy electrode Dx to the total area of the touch unit Tu, the lower the percentage of the area of the touch electrode (the first touch electrode Tx and the second touch electrode Rx), and the smaller the load and the touch area of the touch control, and the poorer the touch performance. Therefore, considering the requirements of load and touch performance, the touch sensor 100 of the embodiment of the present application can reduce the proportion of the area of the touch electrode (the first touch electrode Tx and the second touch electrode Rx) by increasing the proportion of the area of the dummy electrode Dx, so as to maintain the requirements of touch performance while reducing the load of the touch sensor 100.

[0071] Optionally, the percentage of the area of the dummy electrode Dx to the total area of the touch unit Tu can be 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% or 40%.

[0072] It should be noted that the first touch electrode Tx is taken as the driving electrode and the second touch electrode Rx is taken as the sensing electrode in the following description, but the present application is not limited thereto. For example, the first touch electrode Tx can be the sensing electrode and the second touch electrode Rx can be the driving electrode.

[0073] In the touch unit row, the first touch electrodes Tx are sequentially connected to form a driving signal channel. In the touch unit column, the second touch electrodes Rx are sequentially connected to form a sensing signal channel.

[0074] Optionally, in one or more embodiments of the present application, the touch sensor 100 further comprises a substrate IL1, an intermediate insulating layer IL2 and a protective layer Bc. The bridge t3 is disposed on the substrate IL1. The intermediate insulating layer IL2 covers the bridge t3. The first touch electrode Tx and the second touch electrode Rx are disposed on a side of the intermediate insulating layer IL2 away from the bridge t3. A plurality of vias gk are formed in the intermediate insulating layer IL2, and two adjacent first touch electrodes Tx are connected to the bridge t3 through the vias gk. The protective layer Bc covers the first touch electrode Tx and the second touch electrode Rx.

[0075] Optionally, in some embodiments of the present application, as shown in FIG. 2, FIG. 4 and FIG. 5, in a touch unit Tu, the first touch electrode Tx comprises a first trunk electrode t1, a second trunk electrode t2 and a bridge t3, the first trunk electrode t1 and the second trunk electrode t2 are connected through the bridge t3, the bridge t3 is disposed in a layer different from the second touch electrode Rx, and the second touch electrode Rx comprises a third trunk electrode r1.

[0076] In a plan view of the touch sensor 100, the first trunk electrode t1 and the second trunk electrode t2 extend along a first direction F1, and the third trunk electrode r1 extends along a second direction F2. The first trunk electrode t1 is located on one side of the third trunk electrode r1, and the second trunk electrode t2 is located on the other side of the third trunk electrode r1. The first trunk electrode t1, the second trunk electrode t2 and the third trunk electrode r1 define a first zone z1, a second zone z2, a third zone z3 and a fourth zone z4, and each of the first zone z1, the second zone z2, the third zone z3 and the fourth zone z4 is provided with a dummy electrode Dx.

[0077] In the above embodiment, the touch unit Tu is divided into four zones, and each zone is provided with a dummy electrode Dx, so that the dummy electrodes Dx can be more evenly distributed in the touch unit Tu, and the uniformity of the touch performance is improved.

[0078] Optionally, in a row of touch units Tu, the first trunk electrode t1 and the second trunk electrode t2 are alternately connected and arranged. In a column of touch units Tu, a plurality of third trunk electrodes r1 are sequentially connected and arranged.

[0079] Optionally, in some embodiments of the present application, as shown in FIG. 2, FIG. 4 and FIG. 5, the first touch electrode Tx further comprises a first connection electrode j1 located in the first zone z1 and at least two first branch electrodes fz1. The first branch electrode fz1 extends along a third direction F3, and the third direction F3 intersects the first direction F1 and the second direction F2, respectively. The first connection electrode j1 connects the at least two first branch electrodes fz1, and one of the at least two first branch electrodes fz1 is connected to the first trunk electrode t1.

[0080] The second touch electrode Rx further includes a second connection electrode j2 located in the first region z1 and at least two second branch electrodes fz2 extending along the third direction F3, the second connection electrode j2 connecting the at least two second branch electrodes fz2, and one of the at least two second branch electrodes fz2 being connected to the third stem electrode r1.

[0081] The portions of the adjacent two first branch electrodes fz1 and the first connection electrode j1 surround a side of a second branch electrode fz2, and the portions of the adjacent two second branch electrodes fz2 and the second connection electrode j2 surround a side of a first branch electrode fz1.

[0082] The dummy electrode Dx includes a first dummy electrode d1 and a second dummy electrode d2. In a direction perpendicular to the third direction F3, the first branch electrode fz1 and the second branch electrode fz2 are alternately arranged to form a first branch unit, the first dummy electrode d1 is arranged between the adjacent first branch electrode fz1 and the second branch electrode fz2, and the second dummy electrode d2 is arranged on an outer side of the first branch unit.

[0083] It should be noted that the first branch unit can be formed by the first branch electrode fz1 connected by the first connection electrode j1 and the second branch electrode fz2 connected by the second connection electrode j2.

[0084] The first branch electrode fz1 and the second branch electrode fz2 are alternately arranged, the portions of the adjacent two first branch electrodes fz1 and the first connection electrode j1 surround a side of a second branch electrode fz2, and the portions of the adjacent two second branch electrodes fz2 and the second connection electrode j2 surround a side of a first branch electrode fz1, so as to increase the coupling of the first touch electrode Tx and the second touch electrode Rx.

[0085] Optionally, in some embodiments of the present application, a first protrusion tb1 is formed on a side of the first branch electrode fz1 facing the second branch electrode fz2, and a first groove ac1 is formed between the adjacent two first protrusions tb1. A second protrusion tb2 is formed on a side of the second branch electrode fz2 facing the first branch electrode fz1, and a second groove ac2 is formed between the adjacent two second protrusions tb2. A part of the first protrusion tb1 is arranged in the second groove ac2, and a part of the second protrusion tb2 is arranged in the first groove ac1.

[0086] The first branch electrode fz1 and the second branch electrode fz2 are arranged in a concave-convex complementary manner, which can increase the coupling length of the first touch electrode Tx and the second touch electrode Rx, so as to increase the coupling signal amount.

[0087] Optionally, in some embodiments of the present application, the first dummy electrode d1 is arranged along the side profile of the first branch electrode fz1. Such an arrangement can better and more fully isolate the first branch electrode fz1 and the second branch electrode fz2, reducing the risk of shorting of the first branch electrode fz1 and the second branch electrode fz2.

[0088] Optionally, in some embodiments of the present application, one of the at least two first branch electrodes fz1 close to the first trunk electrode t1 is connected to the first trunk electrode t1 by a first protrusion tb1, and one of the at least two second branch electrodes fz2 close to the third trunk electrode r1 is connected to the third trunk electrode r1 by a second protrusion tb2.

[0089] It can be understood that, due to the large size of the first protrusion tb1 and the second protrusion tb2, connecting the first trunk electrode t1 by the first protrusion tb1 and connecting the third trunk electrode r1 by the second protrusion tb2 can increase the connection area, thereby improving the reliability of the connection.

[0090] Optionally, in some embodiments of the present application, a first hollow opening k1 is further arranged on the first branch electrode fz1, and the first hollow opening k1 is located in the first protrusion tb1. The dummy electrode Dx further includes a third dummy electrode d3 arranged in the first hollow opening k1.

[0091] It can be understood that, by opening the first hollow opening k1 on the first branch electrode fz1, the area of the first branch electrode fz1 can be reduced, thereby reducing the load of the touch control. When the touch sensor 100 is applied to an organic light-emitting panel, opening the first hollow opening k1 can also reduce the coupling capacitance between the first touch electrode Tx and the cathode. By arranging the third dummy electrode d3 in the first hollow opening k1, the uniformity of light emission of the entire touch sensor 100 can be improved.

[0092] Optionally, in some embodiments of the present application, a second hollow opening k2 is further arranged on the second branch electrode fz2, and the second hollow opening k2 is located in the second protrusion tb2. The dummy electrode Dx further includes a fourth dummy electrode d4 arranged in the second hollow opening k2.

[0093] It can be understood that, by opening the second hollow opening k2 on the second branch electrode fz2, the area of the second branch electrode fz2 can be reduced, thereby reducing the load of the touch control. When the touch sensor 100 is applied to an organic light-emitting panel, opening the second hollow opening k2 can also reduce the coupling capacitance between the second touch electrode Rx and the cathode. By arranging the fourth dummy electrode d4 in the second hollow opening k2, the uniformity of light emission of the entire touch sensor 100 can be improved.

[0094] Optionally, in some embodiments of the present application, please refer to FIG. 2, FIG. 4 and FIG. 5, the first touch electrode Tx further comprises a third connection electrode j3 and at least two third branch electrodes fz3 in the second region z2. The third branch electrodes fz3 extend along a fourth direction F4, which intersects the first direction F1, the second direction F2 and the third direction F3 respectively. The third connection electrode j3 connects the at least two third branch electrodes fz3, and one of the at least two third branch electrodes fz3 is connected to the second trunk electrode t2.

[0095] The second touch electrode Rx further comprises a fourth connection electrode j4 and at least two fourth branch electrodes fz4 in the second region z2. The fourth branch electrodes fz4 extend along the fourth direction F4, and the fourth connection electrode j4 connects the at least two fourth branch electrodes fz4, and one of the at least two fourth branch electrodes fz4 is connected to the third trunk electrode r1.

[0096] The portions of the adjacent two third branch electrodes fz3 and the third connection electrode j3 surround the periphery of a fourth branch electrode fz4, and the portions of the adjacent two fourth branch electrodes fz4 and the fourth connection electrode j4 surround the periphery of a third branch electrode fz3.

[0097] The dummy electrode Dx comprises a fifth dummy electrode d5 and a sixth dummy electrode d6. In a direction perpendicular to the fourth direction F4, the third branch electrodes fz3 and the fourth branch electrodes fz4 are alternately arranged to form a second branch unit, the fifth dummy electrode d5 is arranged between the adjacent third branch electrodes fz3 and fourth branch electrodes fz4, and the sixth dummy electrode d6 is arranged at the outer periphery of the second branch unit.

[0098] It should be noted that the second branch unit can be formed by the third connection electrode j3 connecting the third branch electrodes fz3 and the fourth connection electrode j4 connecting the fourth branch electrodes fz4.

[0099] In the above embodiments, the third branch electrodes fz3 and the fourth branch electrodes fz4 are alternately arranged, and the portions of the adjacent two third branch electrodes fz3 and the third connection electrode j3 surround the periphery of a fourth branch electrode fz4, and the portions of the adjacent two fourth branch electrodes fz4 and the fourth connection electrode j4 surround the periphery of a third branch electrode fz3, so as to increase the coupling of the first touch electrode Tx and the second touch electrode Rx.

[0100] Optionally, in some embodiments of the present application, the third branch electrode fz3 is formed with a third protrusion tb3 on a side facing the fourth branch electrode fz4, and a third groove ac3 is formed between two adjacent third protrusions tb3. The fourth branch electrode fz4 is formed with a fourth protrusion tb4 on a side facing the third branch electrode fz3, and a fourth groove ac4 is formed between two adjacent fourth protrusions tb4. Part of the third protrusion tb3 is arranged in the fourth groove ac4, and part of the fourth protrusion tb4 is arranged in the third groove ac2.

[0101] In the above arrangement, the third branch electrode fz3 and the fourth branch electrode fz4 are arranged in a concave-convex complementary manner, which can increase the coupling length of the first touch electrode Tx and the second touch electrode Rx, thereby increasing the coupling signal amount.

[0102] Optionally, in some embodiments of the present application, the fifth dummy electrode d5 is arranged along the side edge profile of the third branch electrode fz3. Such an arrangement can better and more fully isolate the third branch electrode fz3 and the fourth branch electrode fz4, thereby reducing the risk of short circuiting of the third branch electrode fz3 and the fourth branch electrode fz4.

[0103] Optionally, in some embodiments of the present application, one of the at least two third branch electrodes fz3 close to the second trunk electrode t2 is connected to the second trunk electrode t2 by the third protrusion tb3, and one of the at least two fourth branch electrodes fz4 close to the third trunk electrode r1 is connected to the third trunk electrode r1 by the fourth protrusion tb4.

[0104] It can be understood that, since the third protrusion tb3 and the fourth protrusion tb4 have a large size, connecting the second trunk electrode t2 by the third protrusion tb3 and connecting the third trunk electrode r1 by the fourth protrusion tb4 can increase the connection area, thereby improving the reliability of the connection.

[0105] Optionally, in some embodiments of the present application, the third branch electrode fz3 is further provided with a third hollow opening k3, and the third hollow opening k3 is located in the third protrusion tb3. The dummy electrode Dx further includes a seventh dummy electrode d7, and the seventh dummy electrode d7 is arranged in the third hollow opening k3.

[0106] It can be understood that, the third hollow opening k3 is arranged on the third branch electrode fz3 to reduce the area of the third branch electrode fz3, thereby reducing the load of the touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the third hollow opening k3 can also reduce the coupling capacitance between the first touch electrode Tx and the cathode. The seventh dummy electrode d7 arranged in the third hollow opening k3 can improve the uniformity of light emission of the entire touch sensor 100.

[0107] Optionally, in some embodiments of the present application, a fourth hollow k4 is further arranged on the fourth branch electrode fz4, and the fourth hollow k4 is located in the fourth protrusion tb4. The dummy electrode Dx further comprises an eighth dummy electrode d8, and the eighth dummy electrode d8 is arranged in the fourth hollow k4.

[0108] It can be understood that the fourth hollow k4 is arranged on the fourth branch electrode fz4 to reduce the area of the fourth branch electrode fz4, thereby reducing the load of the touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the fourth hollow k4 can also reduce the coupling capacitance between the second touch electrode Rx and the cathode. The eighth dummy electrode d8 arranged in the fourth hollow k4 can improve the uniformity of light emitted by the entire touch sensor 100.

[0109] Optionally, in some embodiments of the present application, please refer to FIG. 2, FIG. 4 and FIG. 5, the first touch electrode Tx further comprises a fifth connecting electrode j5 and at least two fifth branch electrodes fz5 located in the third area z3. The fifth branch electrode fz5 extends along a fifth direction F5, and the fifth direction F5 intersects the first direction F1, the second direction F2 and the third direction F3 respectively. Optionally, the fifth direction F5 can be parallel to or coincide with the fourth direction F4. In some embodiments, the fifth direction F5 can also intersect the fourth direction F4.

[0110] The fifth connecting electrode j5 connects the at least two fifth branch electrodes fz5, and one of the at least two fifth branch electrodes fz5 is connected to the first trunk electrode t1.

[0111] The second touch electrode Rx further comprises a sixth connecting electrode j6 and at least two sixth branch electrodes fz6 located in the third area z3. The sixth branch electrode fz6 extends along the fifth direction F5, and the sixth connecting electrode j6 connects the at least two sixth branch electrodes fz6. One of the at least two sixth branch electrodes fz6 is connected to the third trunk electrode r1.

[0112] The portions of the adjacent two fifth branch electrodes fz5 and the fifth connecting electrode j5 are arranged on the circumferential side of a sixth branch electrode fz6, and the portions of the adjacent two sixth branch electrodes fz6 and the sixth connecting electrode j6 are arranged on the circumferential side of a fifth branch electrode fz5.

[0113] The dummy electrode Dx comprises a ninth dummy electrode d9 and a tenth dummy electrode d10. In a direction perpendicular to the fifth direction F5, the fifth branch electrode fz5 and the sixth branch electrode fz6 are arranged alternately to form a third branch unit. The ninth dummy electrode d9 is arranged between the adjacent fifth branch electrode fz5 and the sixth branch electrode fz6, and the tenth dummy electrode d10 is arranged on the outer circumferential side of the third branch unit.

[0114] It is to be noted that the third branch unit can be formed by the fifth connection electrode j5 connecting the fifth branch electrode fz5 and the sixth connection electrode j6 connecting the sixth branch electrode fz6.

[0115] The fifth branch electrode fz5 and the sixth branch electrode fz6 are arranged alternately, and the fifth branch electrode fz5 and the fifth connection electrode j5 are arranged on the side of the sixth branch electrode fz6, and the sixth branch electrode fz6 and the sixth connection electrode j6 are arranged on the side of the fifth branch electrode fz5, so as to increase the coupling of the first touch electrode Tx and the second touch electrode Rx.

[0116] Optionally, in some embodiments of the present application, the fifth branch electrode fz5 is formed with a fifth protrusion tb5 on one side facing the sixth branch electrode fz6, and a fifth groove ac5 is formed between the two adjacent fifth protrusions tb5. The sixth branch electrode fz6 is formed with a sixth protrusion tb6 on one side facing the fifth branch electrode fz5, and a sixth groove ac6 is formed between the two adjacent sixth protrusions tb6. The fifth protrusion tb5 is partially arranged in the sixth groove ac6, and the sixth protrusion tb6 is partially arranged in the fifth groove ac5.

[0117] The fifth branch electrode fz5 and the sixth branch electrode fz6 are arranged in a concave-convex complementary manner, which can increase the coupling length of the first touch electrode Tx and the second touch electrode Rx, so as to increase the coupling signal amount.

[0118] Optionally, in some embodiments of the present application, the ninth dummy electrode d9 is arranged along the side edge contour of the fifth branch electrode fz5. Such arrangement can better and more fully isolate the fifth branch electrode fz5 and the sixth branch electrode fz6, and reduce the risk of short circuit of the fifth branch electrode fz5 and the sixth branch electrode fz6.

[0119] Optionally, in some embodiments of the present application, one of the at least two fifth branch electrodes fz5 close to the first main electrode t1 is connected to the first main electrode t1 through the fifth protrusion tb5, and one of the at least two sixth branch electrodes fz6 close to the third main electrode r1 is connected to the third main electrode r1 through the sixth protrusion tb6.

[0120] It can be understood that, since the size of the fifth protrusion tb5 and the sixth protrusion tb6 is large, connecting the first main electrode t1 through the fifth protrusion tb5 and connecting the third main electrode r1 through the sixth protrusion tb6 can increase the connection area, and thus improve the connection reliability.

[0121] Optionally, in some embodiments of the present application, a fifth hollow k5 is further arranged on the fifth branch electrode fz5, and the fifth hollow k5 is located in the fifth protrusion tb5. The dummy electrode Dx further comprises an eleventh dummy electrode d11 arranged in the fifth hollow k5.

[0122] It can be understood that the fifth hollow k5 is arranged on the fifth branch electrode fz5 to reduce the area of the fifth branch electrode fz5, thereby reducing the load of touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the fifth hollow k5 can also reduce the coupling capacitance between the first touch electrode Tx and the cathode. The eleventh dummy electrode d11 arranged in the fifth hollow k5 can improve the uniformity of light emission of the entire touch sensor 100.

[0123] Optionally, in some embodiments of the present application, a sixth hollow k6 is further arranged on the sixth branch electrode fz6, and the sixth hollow k6 is located in the sixth protrusion tb6. The dummy electrode Dx further comprises a twelfth dummy electrode d12 arranged in the sixth hollow k6.

[0124] It can be understood that the sixth hollow k6 is arranged on the sixth branch electrode fz6 to reduce the area of the sixth branch electrode fz6, thereby reducing the load of touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the sixth hollow k6 can also reduce the coupling capacitance between the second touch electrode Rx and the cathode. The twelfth dummy electrode d12 arranged in the sixth hollow k6 can improve the uniformity of light emission of the entire touch sensor 100.

[0125] Optionally, in some embodiments of the present application, please refer to FIG. 2, FIG. 4 and FIG. 5, the first touch electrode Tx further comprises a seventh connecting electrode j7 and at least two seventh branch electrodes fz7 located in the fourth area z4. The seventh branch electrode fz7 extends along a sixth direction F6, and the sixth direction F6 intersects the first direction F1, the second direction F2 and the fifth direction F5, respectively. Optionally, the sixth direction F6 can be parallel to or coincide with the third direction F3, but is not limited thereto, for example, the sixth direction F6 can intersect the third direction F3. In some embodiments, the sixth direction F6 can be perpendicular to the fifth direction F5 and the fourth direction F4.

[0126] The seventh connecting electrode j7 connects the at least two seventh branch electrodes fz7, and one of the at least two seventh branch electrodes fz7 is connected to the second trunk electrode t2.

[0127] The second touch electrode Rx further includes an eighth connection electrode j8 located in the fourth region z4 and at least two eighth branch electrodes fz8 extending along the sixth direction F6, the eighth connection electrode j8 connecting the at least two eighth branch electrodes fz8, and one of the at least two eighth branch electrodes fz8 being connected to the third stem electrode r1.

[0128] Portions of the adjacent two seventh branch electrodes fz7 and seventh connection electrodes j7 surround a periphery of one eighth branch electrode fz8, and portions of the adjacent two eighth branch electrodes fz8 and eighth connection electrodes j8 surround a periphery of one seventh branch electrode fz7.

[0129] The dummy electrode Dx includes a thirteenth dummy electrode d13 and a fourteenth dummy electrode d14. In a direction perpendicular to the sixth direction F6, the seventh branch electrodes fz7 and the eighth branch electrodes fz8 are alternately arranged to form fourth branch units, the thirteenth dummy electrode d13 is arranged between the adjacent seventh branch electrode fz7 and eighth branch electrode fz8, and the fourteenth dummy electrode d14 is arranged at a periphery of the fourth branch unit.

[0130] It should be noted that the fourth branch unit can be formed by the seventh connection electrode j7 connecting the seventh branch electrode fz7 and the eighth connection electrode j8 connecting the eighth branch electrode fz8.

[0131] The seventh branch electrode fz7 and the eighth branch electrode fz8 are alternately arranged, portions of the adjacent two seventh branch electrodes fz7 and seventh connection electrodes j7 surround a periphery of one eighth branch electrode fz8, and portions of the adjacent two eighth branch electrodes fz8 and eighth connection electrodes j8 surround a periphery of one seventh branch electrode fz7, so as to increase coupling of the first touch electrode Tx and the second touch electrode Rx.

[0132] Optionally, in some embodiments of the present application, the seventh branch electrode fz7 is formed with a seventh protrusion tb7 on one side facing the eighth branch electrode fz8, and a seventh recess ac7 is formed between the adjacent two seventh protrusions tb7. The eighth branch electrode fz8 is formed with an eighth protrusion tb8 on one side facing the seventh branch electrode fz7, and an eighth recess ac8 is formed between the adjacent two eighth protrusions tb8. A part of the seventh protrusion tb7 is arranged in the eighth recess ac8, and a part of the eighth protrusion tb8 is arranged in the seventh recess ac7.

[0133] The seventh branch electrode fz7 and the eighth branch electrode fz8 are arranged in a concave-convex complementary manner, which can increase the coupling length of the first touch electrode Tx and the second touch electrode Rx, so as to increase the coupling signal amount.

[0134] Optionally, in some embodiments of the present application, the thirteenth dummy electrode d13 is arranged along the side profile of the seventh branch electrode fz7. Such an arrangement can better and more fully isolate the seventh branch electrode fz7 and the eighth branch electrode fz8, reducing the risk of shorting of the seventh branch electrode fz7 and the eighth branch electrode fz8.

[0135] Optionally, in some embodiments of the present application, one of the at least two seventh branch electrodes fz7 close to the first trunk electrode t1 is connected to the second trunk electrode t2 by a seventh protrusion tb7, and one of the at least two eighth branch electrodes fz8 close to the third trunk electrode r1 is connected to the third trunk electrode r1 by an eighth protrusion tb8.

[0136] It can be understood that, due to the large size of the seventh protrusion tb7 and the eighth protrusion tb8, connecting the second trunk electrode t2 by the seventh protrusion tb7 and connecting the third trunk electrode r1 by the eighth protrusion tb8 can increase the connection area, thereby improving the reliability of the connection.

[0137] Optionally, in some embodiments of the present application, a seventh hollow opening k7 is further arranged on the seventh branch electrode fz7, and the seventh hollow opening k7 is located in the seventh protrusion tb7. The dummy electrode Dx further comprises a fifteenth dummy electrode d15 arranged in the seventh hollow opening k7.

[0138] It can be understood that, the seventh hollow opening k7 is arranged on the seventh branch electrode fz7 to reduce the area of the seventh branch electrode fz7, thereby reducing the load of touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the seventh hollow opening k7 can also reduce the coupling capacitance between the first touch electrode Tx and the cathode. The fifteenth dummy electrode d15 arranged in the seventh hollow opening k7 can improve the uniformity of light emission of the entire touch sensor 100.

[0139] Optionally, in some embodiments of the present application, an eighth hollow opening k8 is further arranged on the eighth branch electrode fz8, and the eighth hollow opening k8 is located in the eighth protrusion tb8. The dummy electrode Dx further comprises a sixteenth dummy electrode d16 arranged in the eighth hollow opening k8.

[0140] It can be understood that, the eighth hollow opening k8 is arranged on the eighth branch electrode fz8 to reduce the area of the eighth branch electrode fz8, thereby reducing the load of touch control. When the touch sensor 100 is applied to an organic light-emitting panel, the eighth hollow opening k8 can also reduce the coupling capacitance between the second touch electrode Rx and the cathode. The sixteenth dummy electrode d16 arranged in the eighth hollow opening k8 can improve the uniformity of light emission of the entire touch sensor 100.

[0141] Optionally, in some embodiments of the present application, in a plan view of the touch unit Tu, the pattern of the touch unit Tu located in the third region z3 is symmetrically arranged with the pattern of the touch unit Tu located in the first region z1 about a middle axis of the first stem electrode t1. The pattern of the touch unit Tu located in the first region z1 and the third region z3 is symmetrically arranged with the pattern of the touch unit Tu located in the second region z2 and the fourth region z4 about a middle axis of the third stem electrode r1. Such an arrangement can improve the uniformity of touch.

[0142] Please refer to FIGS. 4-6. Optionally, in some embodiments of the present application, the first touch electrode Tx and the second touch electrode Rx are arranged in the same layer. The third stem electrode r1 includes a first stem portion r11, a stem connecting portion r13 and a second stem portion r12 connected in sequence along the second direction F2, the first stem portion r11 is located on one side of the first stem electrode t1, and the second stem portion r12 is located on the other side of the first stem electrode t1.

[0143] The bridge portion t3 is provided with a first opening h1, and in a plan view of the touch unit Tu, the stem connecting portion r13 is arranged in the first opening h1.

[0144] It can be understood that the bridge portion t3 is provided with the first opening h1 to correspond to the stem connecting portion r13, avoiding the overlap of the entity of the bridge portion t3 and the stem connecting portion r13 in the thickness direction, thereby avoiding the risk of forming an interfering vertical capacitor, to provide the accuracy of touch.

[0145] Optionally, in some embodiments of the present application, a portion of the first stem portion r11 close to the stem connecting portion r13 is provided with a second opening h2, and a portion of the second stem portion r12 close to the stem connecting portion r13 is provided with a third opening h3.

[0146] In a plan view of the touch unit Tu, the second opening h2 and the third opening h3 both expose a part of the stem connecting portion r13.

[0147] It can be understood that the second opening h2 and the third opening h3 are used to correspond to a part of the bridge portion t3, reducing the overlap area of the entity of the bridge portion t3 and the third stem electrode r1 in the thickness direction, thereby reducing the risk of forming an interfering vertical capacitor, to provide the accuracy of touch.

[0148] Please refer to FIGS. 7-10. Correspondingly, the present application also provides a display device 1000, which includes a display panel 200 and a touch sensor 100 according to any one of the above embodiments, and the touch sensor 100 is arranged on the light-emitting side of the display panel 200.

[0149] It should be noted that the structure of the touch sensor of the display apparatus 1000 according to the embodiments of the present application is similar or the same as that of the touch sensor 100 of the above-described embodiments, and the description of the touch sensor 100 of the above-described embodiments can be referred to.

[0150] The display apparatus 1000 according to some embodiments of the present application can be used by a portable electronic device such as a mobile phone, a smart phone, a tablet, a mobile communication terminal, an electronic notebook, an electronic book, a portable multimedia player (PMP), a navigation device, and an ultra-mobile PC. For example, the display apparatus 1000 can be used as a display unit of a television, a laptop computer, a monitor, an electronic billboard, or an Internet of Things (IOT) device. For another example, the display apparatus 1000 can be applied to a wearable device such as a smart watch, a watch phone, a glasses-type display, and a head-mounted display.

[0151] The display apparatus 1000 according to some embodiments can be classified into various apparatuses according to a manner of displaying an image. For example, the display apparatus 1000 can be classified and implemented as an organic light emitting display apparatus, an inorganic light emitting display apparatus, a quantum dot light emitting display apparatus, a micro light emitting diode display apparatus, a nano light emitting diode display apparatus, a plasma display apparatus, a field emission display apparatus, a liquid crystal display apparatus, an electrophoretic display apparatus, etc. In the following description, an organic light emitting display apparatus will be described as an example of a display apparatus for explanation.

[0152] The touch sensor 100 can be mounted on a front surface of the display panel 200 or formed integrally with the display panel 200.

[0153] The display panel 200 can be divided into a display area DA for displaying an image and a non-display area NDA located around the display area DA. Among them, the display area DA overlaps the touch area TP, and the non-display area ND and the non-touch area NTP overlap.

[0154] Referring to FIG. 9, the display panel 200 includes a plurality of sub-pixels sp. The sub-pixels sp are disposed in the display area DA. The sub-pixels sp can include red sub-pixels, green sub-pixels, and blue sub-pixels, or red sub-pixels, green sub-pixels, blue sub-pixels, and white sub-pixels.

[0155] The first touch electrode Tx and the second touch electrode Rx are each in a mesh shape, and the meshes of the first touch electrode Tx and the second touch electrode Rx correspond to the sub-pixels sp. The plurality of touch units Tu are located in the display area DA of the display panel 200.

[0156] Optionally, in a direction perpendicular to the third direction F3, the first dummy electrode d1 at least spans one sub-pixel sp. In a direction perpendicular to the fourth direction F4, the fifth dummy electrode d5 at least spans one sub-pixel sp. In a direction perpendicular to the fifth direction F5, the ninth dummy electrode d9 at least spans one sub-pixel sp. In a direction perpendicular to the sixth direction F6, the thirteenth dummy electrode d13 at least spans one sub-pixel sp.

[0157] The first dummy electrode d1, the fifth dummy electrode d5, the ninth dummy electrode d9 and the thirteenth dummy electrode d13 at least span one sub-pixel sp in the width direction to better separate the first touch electrode Tx and the second touch electrode Rx, avoiding the risk of shorting the two.

[0158] Optionally, in some embodiments of the present application, the first hollow k1 to the eighth hollow k8 expose at least 4 to 16 sub-pixels sp. It can be understood that the more sub-pixels sp exposed by the hollow, and the smaller the effective area of the corresponding touch electrode, the larger the area of the dummy electrode Dx that can be set. By adjusting the size of the hollow, the area of the touch electrode and the dummy electrode Dx can be fine-tuned, and thus the size of the touch sensor 100 load can be fine-tuned.

[0159] Optionally, the first hollow k1 to the eighth hollow k8 can expose 4 sub-pixels sp, 5 sub-pixels sp, 6 sub-pixels sp, 7 sub-pixels sp, 8 sub-pixels sp, 9 sub-pixels sp, 10 sub-pixels sp, 11 sub-pixels sp, 12 sub-pixels sp, 13 sub-pixels sp, 14 sub-pixels sp, 15 sub-pixels sp or 16 sub-pixels sp.

[0160] Optionally, in some embodiments of the present application, the display panel 200 includes a light emitting device layer 21 and an encapsulation layer 22 disposed on the light emitting side of the light emitting device layer 21. The touch sensor 100 is disposed on the side of the encapsulation layer 22 away from the light emitting device layer 21. The encapsulation layer 22 includes a first inorganic layer 221, an organic layer 222 and a second inorganic layer 223 stacked in sequence. The thickness of the organic layer 222 is less than or equal to 8 microns.

[0161] It can be understood that the lower the thickness of the organic encapsulation layer, the greater the load of the touch sensor, and the above-mentioned touch sensor 100 can be applied to an organic display panel with a lower organic encapsulation layer, which can reduce the load of the touch sensor 100 and meet the demand for touch performance compared with the prior art.

[0162] Optionally, the thickness of the organic layer 222 can be 8 microns, 7 microns, 6 microns or 5 microns, etc.

[0163] Optionally, the light-emitting device layer 21 comprises a driving circuit layer and an organic light-emitting device arranged on the driving circuit layer.

[0164] Optionally, in some embodiments of the present application, the display device 1000 further comprises a cover plate 300 arranged on the side of the touch sensor 100 away from the display panel 200, the cover plate 300 comprises at least two film layers stacked, and the thickness of the cover plate 300 is less than or equal to 500 microns.

[0165] It can be understood that the greater the thickness of the cover plate 300, the greater the distance between the finger and the touch sensor 100 when touching, and the worse the touch effect. Therefore, the thickness of the cover plate 300 is limited to be less than 500 microns to meet the distance requirement of touching and avoid poor touch effect.

[0166] Optionally, the thickness of the cover plate 300 can be 500 microns, 450 microns, 400 microns, 350 microns, 300 microns, 250 microns or 200 microns, etc.

[0167] Optionally, the cover plate 300 comprises an ultrathin glass layer 31, a protective layer 32 with adhesive and a replaceable protective layer 33 stacked in sequence.

[0168] In some embodiments, a color film layer 400 can also be arranged between the touch sensor 100 and the cover plate 300. The cover plate 300 is arranged on the color film layer 400 through a first optical adhesive layer 51. The color film layer 400 and the touch sensor 100 are arranged with a second optical adhesive layer 52.

[0169] The touch sensor 100 of the display device 1000 of the embodiments of the present application can reduce the area ratio of the touch electrode by increasing the area ratio of the dummy electrode Dx, thereby reducing the load of the touch sensor 100 while maintaining the touch performance requirement.

[0170] The above describes in detail the touch sensor and display device provided by the embodiments of the present application. The principles and implementation manners of the present application are described by applying specific examples. The above embodiment description is only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range can be changed. In summary, the content of the specification should not be understood as limiting the present application.

Claims

1. A touch sensor, comprising: a plurality of touch units arranged along a first direction and a second direction, the first direction intersecting the second direction, a touch unit comprising a first touch electrode and a second touch electrode arranged separately, the first touch electrode being one of a drive electrode and a sense electrode, the second touch electrode being the other of the drive electrode and the sense electrode; the touch unit further comprising a dummy electrode arranged separately from the first touch electrode and the second touch electrode, in a plan view of the touch unit, a percentage of an area of the dummy electrode to a total area of the touch unit being greater than 27% and less than or equal to 40%.

2. The touch sensor of claim 1, wherein, in a touch unit, the first touch electrode comprises a first trunk electrode, a second trunk electrode and a bridge portion, the first trunk electrode and the second trunk electrode being connected by the bridge portion, the bridge portion being arranged in a different layer from the second touch electrode, the second touch electrode comprising a third trunk electrode; in a plan view of the touch sensor, the first trunk electrode and the second trunk electrode extend along a first direction, the third trunk electrode extends along a second direction, the first direction intersecting the second direction, the first trunk electrode is located on one side of the third trunk electrode, the second trunk electrode is located on another side of the third trunk electrode; the first trunk electrode, the second trunk electrode and the third trunk electrode define a first region, a second region, a third region and a fourth region, the first region, the second region, the third region and the fourth region are provided with the dummy electrode.

3. The touch sensor of claim 2, wherein, the first touch electrode further comprises a first connection electrode and at least two first branch electrodes in the first region, the first branch electrodes extend along a third direction, the third direction intersects the first direction and the second direction respectively, the first connection electrode connects the at least two first branch electrodes, one of the at least two first branch electrodes is connected to the first trunk electrode; the second touch electrode further comprises a second connection electrode and at least two second branch electrodes in the first region, the second branch electrodes extend along the third direction, the second connection electrode connects the at least two second branch electrodes, one of the at least two second branch electrodes is connected to the third trunk electrode; portions of adjacent two first branch electrodes and the first connection electrode are arranged around a periphery side of a second branch electrode, portions of adjacent two second branch electrodes and the second connection electrode are arranged around a periphery side of a first branch electrode; the dummy electrode comprises a first dummy electrode and a second dummy electrode, in a direction perpendicular to the third direction, the first branch electrodes and the second branch electrodes are arranged alternately to form a first branch unit, the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes, the second dummy electrode is arranged on an outer periphery side of the first branch unit.

4. The touch sensor of claim 3, wherein, The first branch electrode is provided with a first protrusion on one side facing the second branch electrode, and a first groove is formed between two adjacent first protrusions. The second branch electrode is provided with a second protrusion on one side facing the first branch electrode, and a second groove is formed between two adjacent second protrusions. Part of the first protrusion is arranged in the second groove, and part of the second protrusion is arranged in the first groove.

5. The touch sensor of claim 4, wherein, The first dummy electrode is arranged along the side edge profile of the first branch electrode.

6. The touch sensor of claim 4, wherein, One of the at least two first branch electrodes close to the first stem electrode is connected to the first stem electrode through the first protrusion, and one of the at least two second branch electrodes close to the third stem electrode is connected to the third stem electrode through the second protrusion.

7. The touch sensor of claim 6, wherein, The first branch electrode is further provided with a first hollow opening in the first protrusion, and the dummy electrode further comprises a third dummy electrode arranged in the first hollow opening.

8. The touch sensor of claim 7, wherein, The second branch electrode is further provided with a second hollow opening in the second protrusion, and the dummy electrode further comprises a fourth dummy electrode arranged in the second hollow opening.

9. The touch sensor of claim 8, wherein, In a plan view of the touch unit, the pattern of the touch unit in the third area and the pattern of the touch unit in the first area are symmetrically arranged about the central axis of the first stem electrode, and the pattern of the touch unit in the first area and the third area and the pattern of the touch unit in the second area and the fourth area are symmetrically arranged about the central axis of the third stem electrode.

10. The touch sensor of any of claims 2-9, wherein, The first touch electrode and the second touch electrode are arranged in the same layer, and the third stem electrode comprises a first stem portion, a stem connecting portion and a second stem portion connected in sequence along the second direction, the first stem portion is located on one side of the first stem electrode, and the second stem portion is located on the other side of the first stem electrode. The bridge portion is provided with a first opening, and in a plan view of the touch unit, the stem connecting portion is arranged in the first opening.

11. The touch sensor of claim 10, wherein, The first stem portion is provided with a second opening near the stem connecting portion, and the second stem portion is provided with a third opening near the stem connecting portion. In a plan view of the touch unit, the second opening and the third opening both expose part of the stem connecting portion.

12. A display device comprising a display panel and a touch sensor, the touch sensor being arranged on the light-out side of the display panel; the touch sensor comprises a plurality of touch units, a plurality of the touch units are arranged along a first direction and a second direction, the first direction intersects the second direction, one touch unit comprises a first touch electrode and a second touch electrode arranged separately from each other, the first touch electrode is one of a driving electrode and a sensing electrode, and the second touch electrode is the other of the driving electrode and the sensing electrode. The touch unit further comprises a dummy electrode, which is arranged separately from the first touch electrode and the second touch electrode, and the area percentage of the dummy electrode in the total area of the touch unit is greater than 27% and less than or equal to 40% in the plan view of the touch unit. The display panel comprises a plurality of sub-pixels, the first touch electrode and the second touch electrode are both grid-shaped, the mesh of the first touch electrode and the second touch electrode corresponds to the sub-pixel, and a plurality of the touch units are located in the display area of the display panel.

13. The display device of claim 12, wherein, In one of the touch units, the first touch electrode comprises a first trunk electrode, a second trunk electrode and a bridge portion, the first trunk electrode and the second trunk electrode are connected through the bridge portion, the bridge portion is arranged in a different layer from the second touch electrode, and the second touch electrode comprises a third trunk electrode. In the plan view of the touch sensor, the first trunk electrode and the second trunk electrode extend along a first direction, the third trunk electrode extends along a second direction, the first direction intersects the second direction, the first trunk electrode is located on one side of the third trunk electrode, and the second trunk electrode is located on the other side of the third trunk electrode; the first trunk electrode, the second trunk electrode and the third trunk electrode define a first area, a second area, a third area and a fourth area, and the first area, the second area, the third area and the fourth area are all provided with the dummy electrode.

14. The display device of claim 13, wherein, The first touch electrode further comprises a first connecting electrode and at least two first branch electrodes located in the first area, the first branch electrodes extend along a third direction, the third direction intersects the first direction and the second direction respectively, the first connecting electrode connects the at least two first branch electrodes, and one of the at least two first branch electrodes is connected to the first trunk electrode; The second touch electrode further comprises a second connecting electrode and at least two second branch electrodes located in the first area, the second branch electrodes extend along the third direction, the second connecting electrode connects the at least two second branch electrodes, and one of the at least two second branch electrodes is connected to the third trunk electrode; The part of the adjacent two first branch electrodes and the first connecting electrode is surrounded on the circumferential side of one of the second branch electrodes, and the part of the adjacent two second branch electrodes and the second connecting electrode is surrounded on the circumferential side of one of the first branch electrodes; The dummy electrode comprises a first dummy electrode and a second dummy electrode, the first branch electrode and the second branch electrode are arranged alternately to form a first branch unit in the direction perpendicular to the third direction, the first dummy electrode is arranged between the adjacent first branch electrode and second branch electrode, and the second dummy electrode is arranged on the outer circumferential side of the first branch unit.

15. The display device of claim 14, wherein, The first branch electrode is formed with a first protrusion on one side facing the second branch electrode, and a first groove is formed between two adjacent first protrusions.

16. The display device of claim 15, wherein, The first dummy electrode is arranged along the side edge profile of the first branch electrode.

17. The display device of claim 15, wherein, One of the at least two first branch electrodes close to the first trunk electrode is connected to the first trunk electrode through the first protrusion, and one of the at least two second branch electrodes close to the third trunk electrode is connected to the third trunk electrode through the second protrusion.

18. The display device of any of claims 12-17, wherein, The display panel comprises a light emitting device layer and an encapsulation layer arranged on the light emitting side of the light emitting device layer, the touch sensor is arranged on the side of the encapsulation layer away from the light emitting device layer, and the encapsulation layer comprises a first inorganic layer, an organic layer and a second inorganic layer arranged in sequence. The thickness of the organic layer is less than or equal to 8 microns.

19. The display device of claim 13, wherein, The first touch electrode further comprises a first connecting electrode and at least two first branch electrodes in the first area, the first branch electrodes extend along a third direction, the third direction intersects the first direction and the second direction respectively, the first connecting electrode connects the at least two first branch electrodes, and one of the at least two first branch electrodes is connected to the first trunk electrode. The second touch electrode further comprises a second connecting electrode and at least two second branch electrodes in the first area, the second branch electrodes extend along the third direction, the second connecting electrode connects the at least two second branch electrodes, and one of the at least two second branch electrodes is connected to the third trunk electrode. The part of the adjacent two first branch electrodes and the first connecting electrode is surrounded by the circumferential side of one second branch electrode, and the part of the adjacent two second branch electrodes and the second connecting electrode is surrounded by the circumferential side of one first branch electrode. The dummy electrode comprises a first dummy electrode, in a direction perpendicular to the third direction, the first branch electrode and the second branch electrode are arranged alternately to form a first branch unit, and the first dummy electrode is arranged between the adjacent first branch electrode and the second branch electrode. In a direction perpendicular to the third direction, the first dummy electrode at least spans one sub-pixel.

20. The display device of any of claims 12-17, wherein, The display device further comprises a cover plate arranged on the side of the touch sensor away from the display panel, the cover plate comprises at least two film layers arranged in sequence, and the thickness of the cover plate is less than or equal to 500 microns.

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