TOUCH SENSOR AND INDICATOR DEVICE

Abstract

The present application discloses a touch sensor and a display device. The touch sensor comprises several touch units, each touch unit comprising a first touch electrode and a second touch electrode arranged separately from one another. The touch unit further comprises a dummy electrode, which is arranged separately from both the first and second touch electrodes. In a top view of the touch unit, the area fraction of the dummy electrode to the total area fraction of the touch unit is more than 27% and at most 40%.

Description

[0001] The present application claims priority from the Chinese patent application with application number 202410990794.4 dated July 23, 2024, the entire contents of which are incorporated into the present application by reference. Technical field

[0002] The present application relates to the field of display technology and relates in particular to a touch sensor and a display device. State of the art

[0003] In related technologies, organic light-emitting diode (OLED) folding devices have high requirements for bending performance. To improve bending performance, the thickness of the organic encapsulation layer is typically reduced. However, reducing the thickness of the organic encapsulation layer increases the stress on the touch sensor, thus impairing touch performance. Disclosure of registration

[0004] Embodiments of the present application provide a touch sensor and a display device that enable a reduction in the load on the touch sensor while still meeting the touch performance requirements.

[0005] On the one hand, embodiments of the present application provide a touch sensor comprising the following: multiple touch units, wherein the multiple touch units are arranged along a first direction and a second direction, the first direction intersecting the second direction, and wherein one of the touch units comprises a first touch electrode and second touch electrode arranged separately from each other, the first touch electrode being one of a control electrode and a sensor electrode, and the second touch electrode being the other of each; wherein the touch unit further comprises dummy electrodes, each arranged separately from the first touch electrode and the second touch electrode, wherein, in the top view of the touch unit, the area fraction of the dummy electrodes to the total area of ​​the touch unit is greater than 27% and less than or equal to 40%.

[0006] On the other hand, embodiments of the present application provide a display device comprising a display panel and a touch sensor corresponding to one of the aforementioned embodiments, wherein the touch sensor is arranged on the light-emitting side of the display panel; wherein the display panel comprises several subpixels, wherein the first touch electrode and the second touch electrode are each designed in a grid shape, wherein the grid openings of the first touch electrode and the second touch electrode correspond to the subpixels, and several of the touch units are arranged in the display area of ​​the display panel. Brief description of the drawings Fig. Figure 1 is a schematic top view of a touch sensor provided by embodiments of the present application; Fig. Figure 2 is a schematic top view of a touch unit of the touch sensor according to embodiments of the present application; Fig. Figure 3 is a schematic sectional view of the touch sensor according to embodiments of the present application; Fig. Figure 4 is a schematic top view of the first touch electrode of a touch unit of the touch sensor according to embodiments of the present application; Fig. Figure 5 is a schematic top view of the second touch electrode of a touch unit of the touch sensor according to embodiments of the present application; Fig. Figure 6 is an enlarged representation of area A in Fig. 2; Fig. 7 is a schematic top view of a display device according to embodiments of the present application; Fig. Figure 8 is a schematic top view of an area of ​​the contact units of the display device according to embodiments of the present application; Fig. Figure 9 is an enlarged representation of area B in Fig. 8; Fig. Figure 10 is a schematic sectional view of the display device according to embodiments of the present application. Designs

[0007] The technical solutions according to embodiments of the present application are described clearly and completely below with reference to the accompanying drawings. It is obvious that the described embodiments represent only a portion of the embodiments of the present application and do not encompass all embodiments. Based on the embodiments described in the present application, those skilled in the art can derive further embodiments without inventive step, which also fall within the scope of protection of the present application. Furthermore, it should be understood that the specific embodiments described herein serve only to illustrate and clarify the present application and are not intended to limit it. The individual embodiments can be combined with one another in the present application without each being repeated individually.Unless otherwise specified, directional terms such as "top" and "bottom" usually refer to the top and bottom of the device in actual use or operating condition, according to the orientation in the drawings; "inside" and "outside" refer to the device's contour. The terms "first," "second," "third," etc., are for identification purposes only and do not imply any numerical limitation or sequence.

[0008] Embodiments of the present application provide a touch sensor comprising the following: multiple touch units, wherein multiple touch units are arranged along a first direction and a second direction, the first direction intersecting the second direction, and wherein one of the touch units comprises a separately arranged first touch electrode and second touch electrode, the first touch electrode being one of a control electrode and a sensor electrode, and the second touch electrode being the other of each; wherein the touch unit further comprises dummy electrodes, each arranged separately from the first touch electrode and the second touch electrode, wherein, in the top view of the touch unit, the area fraction of the dummy electrodes to the total area of ​​the touch unit is greater than 27% and less than or equal to 40%.

[0009] Optionally, in some embodiments of the present application, the first touch electrode comprises a first main electrode, a second main electrode and a bridge part, wherein the first main electrode and the second main electrode are connected via the bridge part and wherein the bridge part is arranged in a different layer than the second touch electrode; wherein the second touch electrode comprises a third main electrode;

[0010] wherein, in the top view of the touch sensor, the first main electrode and the second main electrode extend along the first direction and the third main electrode extends along the second direction, the first direction intersecting the second direction, and wherein the first main electrode is located on one side of the third main electrode and the second main electrode is located on the other side of the third main electrode; wherein the first main electrode, the second main electrode and the third main electrode form a first region, a second region, a third region and a fourth region, and wherein dummy electrodes are arranged in each of the first region, the second region, the third region and the fourth region.

[0011] Optionally, in some embodiments of the present application, the first touch electrode further comprises a first connecting electrode arranged in the first region and at least two first branch electrodes, wherein the first branch electrodes extend along a third direction, the third direction intersecting both the first direction and the second direction, wherein the first connecting electrode connects at least two of the first branch electrodes and wherein one of the at least two first branch electrodes is connected to the first main electrode;

[0012] The second touch electrode further comprises a second connecting electrode arranged in the first region and at least two second branch electrodes, wherein the second branch electrodes extend along the third direction, wherein the second connecting electrode connects at least two of the second branch electrodes and wherein one of the at least two second branch electrodes is connected to the third main electrode.

[0013] Parts of the two adjacent first branch electrodes and the first connecting electrode are arranged around one of the second branch electrodes, and parts of the two adjacent second branch electrodes and the second connecting electrode are arranged around one of the first branch electrodes.

[0014] The dummy electrode comprises a first dummy electrode and a second dummy electrode, wherein the first branch electrodes and the second branch electrodes are arranged alternately in a direction perpendicular to the third direction to form a first branch unit, wherein the first dummy electrode is located between adjacent first branch electrodes and second branch electrodes and the second dummy electrode is located on the outer circumferential side of the first branch unit.

[0015] Optionally, in some embodiments of the present application, the first branch electrodes have a first projection on the side facing the second branch electrode, wherein a first groove is formed between two adjacent first projections; and the second branch electrodes have a second projection on the side facing the first branch electrode, wherein a second groove is formed between two adjacent second projections, wherein a part of the first projection is arranged in the second groove and a part of the second projection is arranged in the first groove.

[0016] Optionally, in some embodiments of the present application, the first dummy electrode runs along the lateral contour of the first branch electrode.

[0017] Optionally, in some embodiments of the present application, one of the at least two first branch electrodes closest to the first main electrode is connected to the first main electrode via the first projection, and one of the at least two second branch electrodes closest to the third main electrode is connected to the third main electrode via the second projection.

[0018] Optionally, in some embodiments of the present application, a first recess is further arranged on the first branch electrode, wherein the first recess is arranged within the first projection and wherein the dummy electrode further comprises a third dummy electrode which is arranged in the first recess.

[0019] Optionally, in some embodiments of the present application, a second recess is further arranged on the second branch electrode, wherein the second recess is arranged within the second projection and wherein the dummy electrode further comprises a fourth dummy electrode which is arranged in the second recess.

[0020] Optionally, in some embodiments of the present application, in the top 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 arranged symmetrically with respect to the center line of the first main electrode, and the pattern of the touch unit in the first and third areas and the pattern of the touch unit in the second and fourth areas are arranged symmetrically with respect to the center line of the third main electrode.

[0021] Optionally, in some embodiments of the present application, the first touch electrode and the second touch electrode are arranged in the same layer, wherein the third main electrode comprises a first main part connected successively along the second direction, a connecting part of the main part and a second main part, wherein the first main part is arranged on one side of the first main electrode and the second main part is arranged on the other side of the first main electrode.

[0022] A first opening is arranged in the bridge section, wherein, in the top view of the contact unit, the connecting part of the main part is arranged in the first opening.

[0023] Optionally, in some embodiments of the present application, a second opening is formed in an area of ​​the first main part adjacent to the connecting part of the main part, and a third opening is formed in an area of ​​the second main part adjacent to the connecting part of the main part.

[0024] In the top view of the contact unit, both the second opening and the third opening expose part of the connecting part of the main part.

[0025] Optionally, in some embodiments of the present application, several of the contact units are arranged in rows along the first direction, wherein in a row of contact units the first main electrode and the second main electrode are alternately connected to each other; several of the contact units are arranged in columns along the second direction, wherein in a column of contact units several of the third main electrodes are successively connected to each other.

[0026] Accordingly, embodiments of the present application further provide a display device comprising a display panel and a touch sensor corresponding to one of the aforementioned embodiments, wherein the touch sensor is arranged on the light-emitting side of the display panel.

[0027] The display panel comprises several subpixels, wherein the first touch electrode and the second touch electrode are each designed in a grid shape, the grid openings of the first touch electrode and the second touch electrode correspond to the subpixels, and several of the touch units are arranged in the display area of ​​the display panel.

[0028] Optionally, in some embodiments of the present application, the display panel comprises a luminaire layer and an encapsulation layer, wherein the encapsulation layer is arranged on the light-emitting side of the luminaire layer and the touch sensor is arranged on a side of the encapsulation layer facing away from the luminaire layer, wherein the encapsulation layer comprises a first inorganic layer, an organic layer and a second inorganic layer stacked successively.

[0029] The thickness of the organic layer is less than or equal to 8 micrometers.

[0030] Optionally, in some embodiments of the present application, in one of the touch units, the first touch electrode comprises a first main electrode, a second main electrode and a bridge part, wherein the first main electrode and the second main electrode are connected via the bridge part and the bridge part is arranged in a different layer than the second touch electrode; wherein the second touch electrode comprises a third main electrode.

[0031] In a top view of the touch sensor, the first main electrode and the second main electrode extend along the first direction, and the third main electrode extends along the second direction, the first direction intersecting the second direction, and the first main electrode being located on one side of the third main electrode and the second main electrode being located on the other side of the third main electrode; the first main electrode, the second main electrode and the third main electrode forming a first region, a second region, a third region and a fourth region, and dummy electrodes being arranged in each of the first region, the second region, the third region and the fourth region.

[0032] The first touch electrode further comprises a first connecting electrode arranged in the first region and at least two first branch electrodes, wherein the first branch electrodes extend along the third direction, the third direction intersecting both the first direction and the second direction, wherein the first connecting electrode connects at least two of the first branch electrodes and wherein one of the at least two first branch electrodes is connected to the first main electrode.

[0033] The second touch electrode further comprises a second connecting electrode arranged in the first region and at least two second branch electrodes, wherein the second branch electrodes extend along the third direction, wherein the second connecting electrode connects at least two of the second branch electrodes and wherein one of the at least two second branch electrodes is connected to the third main electrode.

[0034] Parts of the two adjacent first branch electrodes and the first connecting electrode are arranged around one of the second branch electrodes, and parts of the two adjacent second branch electrodes and the second connecting electrode are arranged around one of the first branch electrodes.

[0035] The dummy electrode comprises a first dummy electrode, wherein the first branch electrodes and the second branch electrodes are arranged alternately in a direction perpendicular to the third direction to form a first branch unit, the first dummy electrode being positioned between adjacent first branch electrodes and second branch electrodes.

[0036] In a direction perpendicular to the third direction, the first dummy electrode spans at least one subpixel.

[0037] Optionally, in some embodiments of the present application, the display device further comprises a cover plate arranged on one side of the touch sensor facing away from the display panel, wherein the cover plate comprises at least two layered film layers arranged one above the other and the thickness of the cover plate is less than or equal to 500 micrometers.

[0038] The touch sensor according to embodiments of the present application reduces the load on the touch sensor by increasing the area fraction of the dummy electrodes and reducing the area fraction of the touch electrodes, while at the same time the requirements for touch performance are met.

[0039] 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 order in which the embodiments described below are presented is not to be understood as a preferred order.

[0040] It should further be noted that, due to the reduction in the thickness of the organic encapsulation layer described in the prior art, the coupling capacitance between the touch electrodes and the cathode increases. This coupling capacitance results in a greater RC delay for the driver electrode located further away from the output signal terminal of the driver chip, and a significant decrease in the excitation frequency of the drive electrode or sensor electrode. This increases the touch load and impairs essential performance characteristics such as the touch reporting rate.

[0041] The touch sensor according to embodiments of the present application reduces the coupling capacitance between the touch electrodes and the cathode by increasing the area fraction of the dummy electrodes in the area of ​​the touch unit and reducing the area fraction of the touch electrodes, thus reducing the load and improving the touch reporting rate.

[0042] With reference to Fig. 1 to Fig. 3. The touch sensor 100 can be used on a display panel according to the embodiments, for example by being applied externally to the display panel or by being integrated on or within the display panel. The touch sensor 100 comprises several touch units Tu, which can include several touch electrodes, wherein the touch electrodes are configured to detect a user's touch by capacitive sensing.

[0043] In Fig. 1 to Fig. 3. The first direction F1 in the top view can be a direction that runs parallel to one side of the touch sensor 100 and can, for example, represent the transverse direction of the touch sensor 100. The second direction F2 can be a direction that runs parallel to another side of the touch sensor 100 in the top view and can represent the longitudinal direction of the touch sensor 100. The first direction F1 is therefore perpendicular to the second direction F2. However, in some embodiments, the first direction F1 and the second direction F2 may not be perpendicular to each other.

[0044] The touch sensor 100 can have a rectangular or square shape in top view, but is not limited to this. In some embodiments, the touch sensor 100 can have a rectangular shape with vertical edges or rounded corners in top view. In top view, the touch sensor 100 comprises two short edges along the first direction F1 and two long edges along the second direction F2.

[0045] As in Fig. As shown in Figure 3, the touch sensor 100 is driven by a control component Qd, which can be a touch chip.

[0046] The control component Qd can be electrically and physically connected to the touch unit Tu. The control component Qd can provide a touch signal excitation signal to multiple touch electrodes in the touch unit Tu and can detect changes in capacitance between these electrodes. Based on these capacitance changes, the control component Qd can determine whether a touch input has occurred and generate touch coordinate data.

[0047] The control component Qd is mounted on the circuit board DL and is electrically connected to the touch sensor 100 via the circuit board DL, but is not limited to this; for example, the control component Qd can also be integrated into the display panel.

[0048] In one or more embodiments of the present application, the touch sensor 100 comprises a touch area TP and a non-touch area NTP, wherein the non-touch area NTP is arranged outside the touch area TP.

[0049] Several contact units Tu are arranged in the contact area TP. Several contact units Tu are arranged along the first direction F1 and the second direction F2.

[0050] The touch sensor 100 further comprises a first signal line xh1 and a second signal line xh2, which are arranged in the non-touch area NTP. One end of the first signal line xh1 is connected to a first touch channel formed by the first touch electrode Tx, and the other end of the first signal line xh1 is connected to the control component 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 control component Qd.

[0051] A touch unit Tu comprises a first touch electrode Tx and a second touch electrode Rx arranged separately, wherein the first touch electrode Tx is one of a control electrode and a sensor electrode, and the second touch electrode Rx is the other of each.

[0052] Optionally, multiple contact units Tu are arranged in rows along the first direction F1 and in columns along the second direction F2. The first direction F1 intersects the second direction F2.

[0053] The touch unit Tu further comprises dummy electrodes Dx, each arranged separately from the first touch electrode Tx and the second touch electrode Rx. In a top view of the touch unit Tu, the area fraction of the dummy electrodes Dx to the total area of ​​the touch unit Tu is greater than 27% and less than or equal to 40%.

[0054] It is important to understand that the area of ​​a feature element refers to the area that the feature element occupies in a top view. For example, in the case of a dummy electrode Dx with a grid structure, its area is the sum of the areas of the grid lines and the grid openings.

[0055] The smaller the area fraction of the dummy electrodes Dx to the total area of ​​the touch unit Tu, the larger the area fraction of the touch electrodes (first touch electrode Tx and second touch electrode Rx), thus increasing the load and the touch area; conversely, the larger the area fraction of the dummy electrodes Dx, the smaller the area fraction of the touch electrodes, thus decreasing the load, reducing the touch area, and impairing touch performance. Therefore, taking into account load requirements and touch performance, the touch sensor 100 according to embodiments of the present application reduces the load on the touch sensor 100, while maintaining the required touch performance, by increasing the area fraction of the dummy electrodes Dx and decreasing the area fraction of the touch electrodes (first touch electrode Tx and second touch electrode Rx).

[0056] Optionally, the area fraction of the dummy electrodes Dx to the total area of ​​the contact unit Tu can be 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39% or 40%.

[0057] It should be noted that the first touch electrode Tx is described below as an example of a control electrode and the second touch electrode Rx as a sensor electrode. However, this is not a limitation; for example, the first touch electrode Tx could be a sensor electrode and the second touch electrode Rx a control electrode.

[0058] In a touch unit row, the first touch electrodes Tx are connected sequentially to form a control signal channel. In a touch unit column, the second touch electrodes Rx are connected sequentially to form a sensing signal channel.

[0059] Optionally, the touch sensor 100, in one or more embodiments, comprises a substrate IL1, an intermediate insulating layer IL2, and a protective layer Bc. The bridge section t3 is arranged on the substrate IL1. The intermediate insulating layer IL2 covers the bridge section t3. The first touch electrode Tx and the second touch electrode Rx are arranged on the side of the intermediate insulating layer IL2 facing away from the bridge section t3. Several vias gk are formed in the intermediate insulating layer IL2, with two adjacent first touch electrodes Tx being connected to the bridge section t3 via the vias gk. The protective layer Bc covers the first touch electrode Tx and the second touch electrode Rx.

[0060] Optionally, in some embodiments of the present application, with reference to Fig. 2, Fig. 4 and Fig. 5 the first touch electrode Tx a first main electrode t1, a second main electrode t2 and a bridge part t3, wherein the first main electrode t1 and the second main electrode t2 are connected via the bridge part t3 and the bridge part t3 is arranged in a different layer than the second touch electrode Rx; wherein the second touch electrode Rx comprises a third main electrode r1.

[0061] In a top view of the touch sensor 100, the first main electrode t1 and the second main electrode t2 extend along the first direction F1, and the third main electrode r1 extends along the second direction F2. The first main electrode t1 is located on one side of the third main electrode r1, and the second main electrode t2 is located on the other side of the third main electrode r1. The first main electrode t1, the second main electrode t2, and the third main electrode r1 form a first region z1, a second region z2, a third region z3, and a fourth region z4, with dummy electrodes Dx being arranged in each of the first region z1, second region z2, third region z3, and fourth region z4.

[0062] The touch unit Tu is divided into four areas, with dummy electrodes Dx arranged in each area, so that the dummy electrodes Dx are distributed more evenly over the touch unit Tu, which improves the uniformity of the touch performance.

[0063] Optionally, in a series of contact units Tu, the first main electrode t1 and the second main electrode t2 are alternately connected to each other. In a column of contact units Tu, several third main electrodes r1 are connected sequentially to each other.

[0064] Optionally, in some embodiments of the second application, the first touch electrode Tx further comprises a first connecting electrode j1 arranged in the first region z1 and at least two first branch electrodes fz1, wherein the first branch electrodes fz1 extend along the third direction F3, wherein the third direction F3 intersects both the first direction F1 and the second direction F2, wherein the first connecting electrode j1 connects at least two of the first branch electrodes fz1 and wherein one of the at least two first branch electrodes fz1 is connected to the first main electrode t1.

[0065] The second touch electrode Rx further comprises a second connecting electrode j2 arranged in the first region z1 and at least two second branch electrodes fz2, wherein the second branch electrodes fz2 extend along the third direction F3, wherein the second connecting electrode j2 connects at least two of the second branch electrodes fz2 and wherein one of the at least two second branch electrodes fz2 is connected to the third main electrode r1.

[0066] Parts of the two adjacent first branch electrodes fz1 and the first connecting electrode j1 are arranged around one of the second branch electrodes fz2, and parts of the two adjacent second branch electrodes fz2 and the second connecting electrode j2 are arranged around one of the first branch electrodes fz1.

[0067] The dummy electrode Dx comprises a first dummy electrode d1 and a second dummy electrode d2. In a direction perpendicular to the third direction F3, the first branch electrodes fz1 and the second branch electrodes fz2 are arranged alternately to form a first branch unit, wherein the first dummy electrode d1 is located between adjacent first branch electrodes fz1 and second branch electrodes fz2, and the second dummy electrode d2 is located on the outer circumferential side of the first branch unit.

[0068] It should be noted that the first branch unit can be formed by connecting the first connecting electrode j1 with the first branch electrodes fz1 and the second connecting electrode j2 with the second branch electrodes fz2.

[0069] The coupling between the first touch electrode Tx and the second touch electrode Rx is increased by the alternating arrangement of the first branch electrodes fz1 and the second branch electrodes fz2, as well as the surrounding arrangements - namely, that parts of the two adjacent first branch electrodes fz1 and the first connecting electrode j1 are arranged around a second branch electrode fz2, and parts of the two adjacent second branch electrodes fz2 and the second connecting electrode j2 are arranged around a first branch electrode fz1.

[0070] Optionally, in some embodiments of the present application, the first branch electrodes fz1 have a first projection tb1 on the side facing the second branch electrode fz2, wherein a first groove ac1 is formed between two adjacent first projections tb1; and the second branch electrodes fz2 have a second projection tb2 on the side facing the first branch electrode fz1, wherein a second groove ac2 is formed between two adjacent second projections tb2, wherein a part of the first projection tb1 is arranged in the second groove ac2 and a part of the second projection tb2 is arranged in the first groove ac1.

[0071] In this process, a complementary arrangement of projections and grooves is used between the first branch electrode fz1 and the second branch electrode fz2, thereby increasing the coupling length between the first touch electrode Tx and the second touch electrode Rx and thus increasing the coupling signal quantities.

[0072] Optionally, in some embodiments of the present application, the first dummy electrode d1 runs along the lateral contour of the first branch electrode fz1. Such an arrangement enables better and more complete insulation between the first branch electrode fz1 and the second branch electrode fz2 and reduces the risk of a short circuit between the first branch electrode fz1 and the second branch electrode fz2.

[0073] Optionally, in some embodiments of the present application, one of the at least two first branch electrodes fz1, which is closest to the first main electrode t1, is connected to the first main electrode t1 via the first projection tb1, and one of the at least two second branch electrodes fz2, which is closest to the third main electrode r1, is connected to the third main electrode r1 via the second projection tb2.

[0074] It can be understood that, due to the relatively large dimensions of the first projection tb1 and the second projection tb2, the connection area is increased by means of the first projection tb1 and the connection of the third main electrode r1 by means of the second projection tb2, thereby improving the reliability of the connection.

[0075] Optionally, in some embodiments of the present application, a first recess k1 is arranged on the first branch electrode fz1, wherein the first recess k1 is arranged within the first projection tb1. The dummy electrode Dx further comprises a third dummy electrode d3, which is arranged in the first recess k1.

[0076] It is understood that the first recess k1 in the first branch electrode fz1 is provided to reduce the area of ​​the first branch electrode fz1 and thereby lower the touch load. When the touch sensor 100 is used in an organic light panel, the design of the first recess k1 can also reduce the coupling capacitance between the first touch electrode Tx and the cathode. Furthermore, by arranging the third dummy electrode d3 within the first recess k1, the light output homogeneity of the entire touch sensor 100 can be improved.

[0077] Optionally, in some embodiments of the present application, a second recess k2 is arranged on the second branch electrode fz2, wherein the second recess k2 is arranged within the second projection tb2. The dummy electrode Dx further comprises a fourth dummy electrode d4, which is arranged in the second recess k2.

[0078] It is understood that the second recess k2 in the second branch electrode fz2 is provided to reduce the area of ​​the second branch electrode fz2 and thus reduce the touch load. When the touch sensor 100 is used in an organic light panel, the design of the second recess k2 can further reduce the coupling capacitance between the second touch electrode Rx and the cathode. Furthermore, by arranging the fourth dummy electrode d4 within the second recess k2, the light output homogeneity of the entire touch sensor 100 can be improved.

[0079] Optionally, in some embodiments of the present application, with reference to Fig. 2, Fig. 4 and Fig. 5 the first touch electrode Tx further a third connecting electrode j3 arranged in the second region z2 and at least two third branch electrodes fz3, wherein the third branch electrodes fz3 extend along the fourth direction F4, wherein the fourth direction F4 intersects the first direction F1, the second direction F2 and the third direction F3, wherein the third connecting electrode j3 connects at least two of the third branch electrodes fz3 and wherein one of the at least two third branch electrodes fz3 is connected to the second main electrode t2.

[0080] The second touch electrode Rx further comprises a fourth connecting electrode j4 arranged in the second region z2 and at least two fourth branch electrodes fz4, wherein the fourth branch electrodes fz4 extend along the fourth direction F4, wherein the fourth connecting electrode j4 connects at least two of the fourth branch electrodes fz4 and wherein one of the at least two fourth branch electrodes fz4 is connected to the third main electrode r1.

[0081] Parts of the two adjacent third branch electrodes fz3 and the third connecting electrode j3 are arranged around one of the fourth branch electrodes fz4, and parts of the two adjacent fourth branch electrodes fz4 and the fourth connecting electrode j4 are arranged around one of the third branch electrodes fz3.

[0082] 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 arranged alternately to form a second branch unit, wherein the fifth dummy electrode d5 is located between adjacent third branch electrodes fz3 and fourth branch electrodes fz4, and the sixth dummy electrode d6 is located on the outer circumferential side of the second branch unit.

[0083] It should be noted that the second branch unit can be formed by connecting the third connecting electrode j3 with the third branch electrodes fz3 and the fourth connecting electrode j4 with the fourth branch electrodes fz4.

[0084] The coupling between the first touch electrode Tx and the second touch electrode Rx is increased by the alternating arrangement of the third branch electrodes fz3 and the fourth branch electrodes fz4, as well as by the surrounding arrangements - namely, that parts of the two adjacent third branch electrodes fz3 and the third connecting electrode j3 are arranged around a fourth branch electrode fz4 and parts of the two adjacent fourth branch electrodes fz4 and the fourth connecting electrode j4 are arranged around a third branch electrode fz3.

[0085] Optionally, in some embodiments of the present application, the third branch electrodes fz3 have a third projection tb3 on the side facing the fourth branch electrode fz4, wherein a third groove ac3 is formed between two adjacent third projections tb3; and the fourth branch electrodes fz4 have a fourth projection tb4 on the side facing the third branch electrode fz3, wherein a fourth groove ac4 is formed between two adjacent fourth projections tb4, wherein a part of the third projection tb3 is arranged in the fourth groove ac4 and a part of the fourth projection tb4 is arranged in the third groove ac3.

[0086] In this process, a complementary arrangement of projections and grooves is used between the third branch electrode fz3 and the fourth branch electrode fz4, thereby increasing the coupling length between the first touch electrode Tx and the second touch electrode Rx and thus increasing the coupling signal quantities.

[0087] Optionally, in some embodiments of the present application, the fifth dummy electrode d5 runs along the lateral contour of the third branch electrode fz3. Such an arrangement enables better and more complete insulation between the third branch electrode fz3 and the fourth branch electrode fz4 and reduces the risk of a short circuit between the third branch electrode fz3 and the fourth branch electrode fz4.

[0088] Optionally, in some embodiments of the present application, one of the at least two third branch electrodes fz3, which is closest to the second main electrode t2, is connected to the second main electrode t2 via the third projection tb3, and one of the at least two fourth branch electrodes fz4, which is closest to the third main electrode r1, is connected to the third main electrode r1 via the fourth projection tb4.

[0089] It can be understood that, due to the relatively large dimensions of the third projection tb3 and the fourth projection tb4, the connection area is increased by means of the third projection tb3 connecting the second main electrode t2 and the third main electrode r1 by means of the fourth projection tb4, thereby improving the reliability of the connection.

[0090] Optionally, in some embodiments of the present application, a third recess k3 is arranged on the third branch electrode fz3, wherein the third recess k3 is arranged within the third projection tb3. The dummy electrode Dx further comprises a seventh dummy electrode d7, which is arranged in the third recess k3.

[0091] It is understood that the third recess k3 in the third branch electrode fz3 is provided to reduce the area of ​​the third branch electrode fz3 and thereby reduce the touch load. When the touch sensor 100 is used in an organic light panel, the design of the third recess k3 can further reduce the coupling capacitance between the first touch electrode Tx and the cathode. Furthermore, by arranging the seventh dummy electrode d7 within the third recess k3, the light output homogeneity of the entire touch sensor 100 can be improved.

[0092] Optionally, in some embodiments of the present application, a fourth recess k4 is arranged on the fourth branch electrode fz4, wherein the fourth recess k4 is arranged within the fourth projection tb4. The dummy electrode Dx further comprises an eighth dummy electrode d8, which is arranged in the fourth recess k4.

[0093] It is understood that the fourth recess k4 in the fourth branch electrode fz4 is provided to reduce the area of ​​the fourth branch electrode fz4 and thus reduce the touch load. When the touch sensor 100 is used in an organic light panel, the design of the fourth recess k4 can further reduce the coupling capacitance between the second touch electrode Rx and the cathode. Furthermore, by arranging the eighth dummy electrode d8 within the fourth recess k4, the light output homogeneity of the entire touch sensor 100 can be improved.

[0094] Optionally, in some embodiments of the present application, with reference to Fig. 2, Fig. 4 and Fig. 5. The first touch electrode Tx, a fifth connecting electrode j5 arranged in the third region z3, and at least two fifth branch electrodes fz5, wherein the fifth branch electrodes fz5 extend along the fifth direction F5, the fifth direction F5 intersecting the first direction F1, the second direction F2, and the third direction F3. Optionally, the fifth direction F5 can run parallel to or identically with the fourth direction F4. In some embodiments, the fifth direction F5 can also intersect the fourth direction F4.

[0095] The fifth connecting electrode j5 connects at least two of the fifth branch electrodes fz5, one of the at least two fifth branch electrodes fz5 being connected to the first main electrode t1.

[0096] The second touch electrode Rx further comprises a sixth connecting electrode j6 arranged in the third region z3 and at least two sixth branch electrodes fz6, wherein the sixth branch electrodes fz6 extend along the fifth direction F5, wherein the sixth connecting electrode j6 connects at least two of the sixth branch electrodes fz6 and wherein one of the at least two sixth branch electrodes fz6 is connected to the third main electrode r1.

[0097] Parts of the two adjacent fifth branch electrodes fz5 and the fifth connecting electrode j5 are arranged around one of the sixth branch electrodes fz6, and parts of the two adjacent sixth branch electrodes fz6 and the sixth connecting electrode j6 are arranged around one of the fifth branch electrodes fz5.

[0098] 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 electrodes fz5 and the sixth branch electrodes fz6 are arranged alternately to form a third branch unit, wherein the ninth dummy electrode d9 is located between adjacent fifth branch electrodes fz5 and sixth branch electrodes fz6, and the tenth dummy electrode d10 is located on the outer circumferential side of the third branch unit.

[0099] It should be noted that the third branch unit can be formed by connecting the fifth connecting electrode j5 with the fifth branch electrodes fz5 and the sixth connecting electrode j6 with the sixth branch electrodes fz6.

[0100] The coupling between the first touch electrode Tx and the second touch electrode Rx is increased by the alternating arrangement of the fifth branch electrodes fz5 and the sixth branch electrodes fz6, as well as by the surrounding arrangements - namely, that parts of the two adjacent fifth branch electrodes fz5 and the fifth connecting electrode j5 are arranged around a sixth branch electrode fz6, and parts of the two adjacent sixth branch electrodes fz6 and the sixth connecting electrode j6 are arranged around a fifth branch electrode fz5.

[0101] Optionally, in some embodiments of the present application, the fifth branch electrodes fz5 have a fifth projection tb5 on the side facing the sixth branch electrode fz6, wherein a fifth groove ac5 is formed between two adjacent fifth projections tb5; and the sixth branch electrodes fz6 have a sixth projection tb6 on the side facing the fifth branch electrode fz5, wherein a sixth groove ac6 is formed between two adjacent sixth projections tb6, wherein a part of the fifth projection tb5 is arranged in the sixth groove ac6 and a part of the sixth projection tb6 is arranged in the fifth groove ac5.

[0102] In this process, a complementary arrangement of projections and grooves is used between the fifth branch electrode fz5 and the sixth branch electrode fz6, thereby increasing the coupling length between the first touch electrode Tx and the second touch electrode Rx and thus increasing the coupling signal quantities.

[0103] Optionally, in some embodiments of the present application, the ninth dummy electrode d9 runs along the lateral contour of the fifth branch electrode fz5. Such an arrangement enables better and more complete insulation between the fifth branch electrode fz5 and the sixth branch electrode fz6 and reduces the risk of a short circuit between the fifth branch electrode fz5 and the sixth branch electrode fz6.

[0104] Optionally, in some embodiments of the present application, one of the at least two fifth branch electrodes fz5, which is closest to the first main electrode t1, is connected to the first main electrode t1 via the fifth projection tb5, and one of the at least two sixth branch electrodes fz6, which is closest to the third main electrode r1, is connected to the third main electrode r1 via the sixth projection tb6.

[0105] It can be understood that, due to the relatively large dimensions of the fifth projection tb5 and the sixth projection tb6, the connection area is increased by means of the fifth projection tb5 and the connection of the third main electrode r1 by means of the sixth projection tb6, thereby improving the reliability of the connection.

[0106] Optionally, in some embodiments of the present application, a fifth recess k5 is arranged on the fifth branch electrode fz5, wherein the fifth recess k5 is arranged within the fifth projection tb5. The dummy electrode Dx further comprises an eleventh dummy electrode d11, which is arranged in the fifth recess k5.

[0107] It is understood that the fifth recess k5 in the fifth branch electrode fz5 is provided to reduce the area of ​​the fifth branch electrode fz5 and thereby reduce the touch load. When the touch sensor 100 is used in an organic light panel, the design of the fifth recess k5 can further reduce the coupling capacitance between the first touch electrode Tx and the cathode. Furthermore, by arranging the eleventh dummy electrode d11 within the fifth recess k5, the light output homogeneity of the entire touch sensor 100 can be improved.

[0108] Optionally, in some embodiments of the present application, a sixth recess k6 is arranged on the sixth branch electrode fz6, wherein the sixth recess k6 is arranged within the sixth projection tb6. The dummy electrode Dx further comprises a twelfth dummy electrode d12, which is arranged in the sixth recess k6.

[0109] It is understood that the sixth recess k6 in the sixth branch electrode fz6 is provided to reduce the area of ​​the sixth branch electrode fz6 and thus reduce the touch load. When the touch sensor 100 is used in an organic light panel, the design of the sixth recess k6 can further reduce the coupling capacitance between the second touch electrode Rx and the cathode. Furthermore, by arranging the twelfth dummy electrode d12 within the sixth recess k6, the light output homogeneity of the entire touch sensor 100 can be improved.

[0110] Optionally, in some embodiments of the present application, with reference to Fig. 2, Fig. 4 and Fig. 5. The first touch electrode Tx, a seventh connecting electrode j7 arranged in the fourth region z4, and at least two seventh branch electrodes fz7, the seventh branch electrodes fz7 extending along the sixth direction F6, the sixth direction F6 intersecting the first direction F1, the second direction F2, and the fifth direction F5. Optionally, the sixth direction F6 may run parallel to or identical with the third direction F3; however, this is not a limitation, e.g., the sixth direction F6 may intersect the third direction F3. In some embodiments, the sixth direction F6 may run perpendicular to the fifth direction F5 and the fourth direction F4.

[0111] The seventh connecting electrode j7 connects at least two of the seventh branch electrodes fz7, wherein one of the at least two seventh branch electrodes fz7 is connected to the second main electrode t2.

[0112] The second touch electrode Rx further comprises an eighth connecting electrode j8 arranged in the fourth region z4 and at least two eighth branch electrodes fz8, wherein the eighth branch electrodes fz8 extend along the sixth direction F6, wherein the eighth connecting electrode j8 connects at least two of the eighth branch electrodes fz8 and wherein one of the at least two eighth branch electrodes fz8 is connected to the third main electrode r1.

[0113] Parts of the two adjacent seventh branch electrodes fz7 and the seventh connecting electrode j7 are arranged around one of the eighth branch electrodes fz8, and parts of the two adjacent eighth branch electrodes fz8 and the eighth connecting electrode j8 are arranged around one of the seventh branch electrodes fz7.

[0114] The dummy electrode Dx comprises 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 arranged alternately to form a fourth branch unit, wherein the thirteenth dummy electrode d13 is arranged between adjacent seventh branch electrodes fz7 and eighth branch electrodes fz8, and the fourteenth dummy electrode d14 is arranged on the outer circumferential side of the fourth branch unit.

[0115] It should be noted that the fourth branch unit can be formed by connecting the seventh connecting electrode j7 with the seventh branch electrodes fz7 and the eighth connecting electrode j8 with the eighth branch electrodes fz8.

[0116] The coupling between the first touch electrode Tx and the second touch electrode Rx is increased by the alternating arrangement of the seventh branch electrodes fz7 and the eighth branch electrodes fz8, as well as by the surrounding arrangements - namely, that parts of the two adjacent seventh branch electrodes fz7 and the seventh connecting electrode j7 are arranged around an eighth branch electrode fz8, and parts of the two adjacent eighth branch electrodes fz8 and the eighth connecting electrode j8 are arranged around a seventh branch electrode fz7.

[0117] Optionally, in some embodiments of the present application, the seventh branch electrodes fz7 have a seventh projection tb7 on the side facing the eighth branch electrode fz8, wherein a seventh groove ac7 is formed between two adjacent seventh projections tb7; and the eighth branch electrodes fz8 have an eighth projection tb8 on the side facing the seventh branch electrode fz7, wherein an eighth groove ac8 is formed between two adjacent eighth projections tb8, wherein a part of the seventh projection tb7 is arranged in the eighth groove ac8 and a part of the eighth projection tb8 is arranged in the seventh groove ac7.

[0118] In this process, a complementary arrangement of projections and grooves is inserted between the seventh branch electrode fz7 and the eighth branch electrode fz8, thereby increasing the coupling length between the first touch electrode Tx and the second touch electrode Rx and thus increasing the coupling signal quantities.

[0119] Optionally, in some embodiments of the present application, the thirteenth dummy electrode d13 runs along the lateral contour of the seventh branch electrode fz7. Such an arrangement enables better and more complete insulation between the seventh branch electrode fz7 and the eighth branch electrode fz8 and reduces the risk of a short circuit between the seventh branch electrode fz7 and the eighth branch electrode fz8.

[0120] Optionally, in some embodiments of the present application, one of the at least two seventh branch electrodes fz7, which is closest to the first main electrode t1, is connected to the second main electrode t2 via the seventh projection tb7, and one of the at least two eighth branch electrodes fz8, which is closest to the third main electrode r1, is connected to the third main electrode r1 via the eighth projection tb8.

[0121] It is understandable that, due to the relatively large dimensions of the seventh projection tb7 and the eighth projection tb8, the connection of the second main electrode t2 via the seventh projection tb7 and the connection of the third main electrode r1 via the eighth projection tb8 can increase the contact area and thus improve the reliability of the connection.

[0122] Optionally, in some embodiments of the present application, a seventh recess k7 is formed on the seventh branch electrode fz7, wherein the seventh recess k7 is arranged in the seventh projection tb7. The dummy electrode Dx further comprises a fifteenth dummy electrode d15, wherein the fifteenth dummy electrode d15 is arranged in the seventh recess k7.

[0123] It is understandable that by forming the seventh recess k7 in the seventh branch electrode fz7, its area can be reduced, thus decreasing the touch load. Furthermore, when the touch sensor 100 is used with an organic light panel, the coupling capacitance between the first touch electrode Tx and the cathode can be reduced by forming the seventh recess k7. By arranging the fifteenth dummy electrode d15 in the seventh recess k7, the light emission uniformity of the entire touch sensor 100 can also be improved.

[0124] Optionally, in some embodiments of the present application, an eighth recess k8 is formed on the eighth branch electrode fz8, wherein the eighth recess k8 is arranged in the eighth projection tb8. The dummy electrode Dx further comprises a sixteenth dummy electrode d16, wherein the sixteenth dummy electrode d16 is arranged in the eighth recess k8.

[0125] It is understandable that by forming the eighth recess k8 in the eighth branch electrode fz8, its area can be reduced, thus decreasing the touch load. Furthermore, when the touch sensor 100 is used with an organic light panel, forming the eighth recess k8 can reduce the coupling capacitance between the second touch electrode Rx and the cathode. By arranging the sixteenth dummy electrode d16 in the eighth recess k8, the light emission uniformity of the entire touch sensor 100 can also be improved.

[0126] Optionally, in some embodiments of the present application, the pattern of the touch element Tu arranged in the third region z3 is arranged in a top view, mirroring the pattern of the touch element Tu arranged in the first region z1 with respect to the central axis of the first main electrode t1. The patterns of the touch element Tu arranged in the first region z1 and in the third region z3 are arranged in a mirroring pattern with respect to the central axis of the third main electrode r1 with respect to the patterns of the touch element Tu arranged in the second region z2 and in the fourth region z4. Such a configuration can improve the uniformity of touch detection.

[0127] With reference to the Fig. In some embodiments of the present application, as described in sections 4 to 6, the first touch electrode Tx is optionally arranged in the same layer as the second touch electrode Rx. The third main electrode r1 comprises a first main part r11 connected successively along the second direction F2, a connecting part r13 of the main part, and a second main part r12, wherein the first main part r11 is arranged on one side of the first main electrode t1 and the second main part r12 is arranged on the other side of the first main electrode t1.

[0128] In the bridge part t3 a first opening h1 is formed, wherein in the top view of the contact element Tu the connecting part r13 of the main part is arranged inside the first opening h1.

[0129] It is understandable that the first opening h1 in the bridge part t3 is formed to correspond to the connecting part r13 of the main part and to avoid the solid part of the bridge part t3 and the connecting part r13 of the main part overlapping in the thickness direction, thereby reducing the risk of a disturbing vertical capacitance between the two and thus improving the precision of the touch detection.

[0130] Optionally, in some embodiments of the present application, a second opening h2 is formed in the area of ​​the first main part r11 near the connecting part r13, and a third opening h3 is formed in the area of ​​the second main part r12 near the connecting part r13.

[0131] In the top view of the contact element Tu, both the second opening h2 and the third opening h3 expose part of the connecting part r13 of the main part.

[0132] It is understandable that by forming the second opening h2 and the third opening h3 corresponding to the areas of the bridge part t3, the overlap area of ​​the solid bridge part t3 and the third main electrode r1 is reduced in the thickness direction, thereby reducing the risk of a disturbing vertical capacitance between the two and thus improving the precision of the touch detection.

[0133] With reference to the Fig. In some embodiments of the present application, as described in sections 7 to 10, a display device 1000 is further provided, comprising a display panel 200 and the touch sensor 100 described above, wherein the touch sensor 100 is arranged on the light emission side of the display panel 200.

[0134] It should be noted that the structure of the touch sensor of the display device 1000 in the embodiments of the present application is similar to or identical with the structure of the touch sensor 100 described above; in this respect, reference is made to the aforementioned embodiments of the touch sensor 100.

[0135] According to some embodiments of the present application, the display device 1000 can be used in portable electronic devices, such as mobile phones, smartphones, tablet computers, mobile communication devices, electronic notebooks, e-book readers, portable multimedia players (PMPs), navigation devices, and ultra-mobile PCs. For example, the display device 1000 can be used as a display unit for televisions, laptops, monitors, electronic billboards, or IoT devices. In another example, the display device 1000 can be used in portable or wearable electronic devices, such as smartwatches, smartwatches, eyeglass-based displays, and head-mounted displays.

[0136] The display device 1000 can be classified into different types of devices depending on the type of image display. For example, the display device 1000 can be configured as an organic light-emitting luminaire, an inorganic light-emitting luminaire, a quantum dot light-emitting luminaire, a micro-LED display, a nano-LED display, a plasma display, a field emission display, a liquid crystal display, an electrophoretic display, etc. The following description explains an organic light-emitting luminaire as an example.

[0137] The touch sensor 100 can be mounted on the front of the display panel 200 or be integrated with the display panel 200.

[0138] The display panel 200 can be divided into a display area DA, which is used for image display, and a non-display area NDA, which surrounds the display area DA. The display area DA overlaps with the touch area TP, and the non-display area NDA overlaps with the non-touch area NTP.

[0139] With reference to Fig. The display panel 200 comprises several subpixels sp. The subpixels sp are arranged in the display area DA. The subpixels sp can include red, green, and blue subpixels, or red, green, blue, and white subpixels.

[0140] The first touch electrode Tx and the second touch electrode Rx are both lattice-shaped, with the mesh openings of the first touch electrode Tx and the second touch electrode Rx corresponding to the subpixels sp. Several touch units Tu are arranged in the display area DA of the display panel 200.

[0141] Optionally, in some embodiments of the present application, the first dummy electrode d1 is configured in a direction perpendicular to the third direction F3 such that it spans at least one subpixel sp. In a direction perpendicular to the fourth direction F4, the fifth dummy electrode d5 spans at least one subpixel sp. In a direction perpendicular to the fifth direction F5, the ninth dummy electrode d9 spans at least one subpixel sp. In a direction perpendicular to the sixth direction F6, the thirteenth dummy electrode d13 spans at least one subpixel sp.

[0142] In this process, the first dummy electrode d1, the fifth dummy electrode d5, the ninth dummy electrode d9 and the thirteenth dummy electrode d13 each span at least one subpixel sp in the width direction in order to better separate the first touch electrode Tx and the second touch electrode Rx from each other and thus avoid the risk of a short circuit between the two.

[0143] Optionally, in some embodiments of the present application, each of the first to eighth recesses k1 to k8 is configured to expose at least 4 to 16 subpixels sp. It is understandable that a larger number of subpixels sp exposed by the recesses reduces the effective area of ​​the respective touch electrode and increases the area of ​​the arrangeable dummy electrode Dx. By adjusting the size of the recesses, the area of ​​the touch electrodes and the dummy electrodes Dx can therefore be fine-tuned, and thus the load on the touch sensor 100 can be adjusted.

[0144] Optionally, the first to eighth notches k1 to k8 can each expose 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 or 16 subpixels sp.

[0145] With reference to Fig.10 In some embodiments of the present application, the display panel 200 comprises a light-emitting unit layer 21 and an encapsulation layer 22, the encapsulation layer 22 being arranged on the light-emitting side of the light-emitting unit layer 21. The touch sensor 100 is arranged on the side of the encapsulation layer 22 facing away from the light-emitting unit layer 21. The encapsulation layer 22 comprises a first inorganic layer 221, an organic layer 222, and a second inorganic layer 223 arranged in succession. The thickness of the organic layer 222 is less than or equal to 8 µm.

[0146] It is understandable that the load on the touch sensor increases as the thickness of the organic encapsulation layer decreases. However, the touch sensor 100 described above is suitable for organic display panels with thin encapsulation and, compared to the prior art, can reduce the load on the touch sensor 100 while still meeting the touch performance requirements.

[0147] Optionally, the thickness of the organic layer 222 can be, for example, 8 µm, 7 µm, 6 µm or 5 µm.

[0148] Optionally, the luminaire layer 21 includes a driver layer and organic luminaire units arranged on it.

[0149] Optionally, in some embodiments of the present application, the display device 1000 further comprises a cover plate 300, which is arranged on the side of the touch sensor 100 facing away from the display panel 200. The cover plate 300 comprises at least two stacked film layers, and the thickness of the cover plate 300 is at most 500 µm.

[0150] It is understandable that as the thickness of the cover plate 300 increases, the distance between the finger and the touch sensor 100 also increases when touched, thus reducing the touch sensitivity. Therefore, the thickness of the cover plate 300 is limited to a maximum of 500 µm to ensure the required contact distance and prevent a deterioration of the touch sensitivity.

[0151] Optionally, the thickness of the cover plate 300 can be, for example, 500 µm, 450 µm, 400 µm, 350 µm, 300 µm, 250 µm or 200 µm.

[0152] Optionally, the cover plate 300 comprises a successively stacked ultra-thin glass layer 31, a bonded protective layer 32 and a replaceable protective layer 33.

[0153] In some embodiments, a color filter layer 400 can further be arranged between the touch sensor 100 and the cover plate 300. The cover plate 300 is arranged on the color filter layer 400 via a first optical adhesive layer 51. A second optical adhesive layer 52 is arranged between the color filter layer 400 and the touch sensor 100.

[0154] The touch sensor 100 of the display device 1000 according to the embodiments of the present application can reduce the load of the touch sensor 100 and simultaneously meet the requirements for touch performance by increasing the area fraction of the dummy electrodes Dx and decreasing the area fraction of the touch electrodes.

[0155] The detailed description above of a touch sensor and a display device according to the embodiments of the present application serves to facilitate a better understanding of the principles and operation of the application by means of concrete examples. The description of the embodiments is intended solely to facilitate understanding of the application and is not to be construed as a limitation. For those skilled in the art, various modifications regarding the specific embodiments and areas of application can be made based on the concepts disclosed in the present application. Therefore, the content of this description must not be interpreted as a limitation of the application.

Claims

[1] Touch sensor, comprising: multiple touch units, wherein the multiple touch units are arranged along a first direction and a second direction, the first direction intersecting the second direction, wherein one of the multiple touch units comprises a separately arranged first touch electrode and second touch electrode, the first touch electrode being one of a control electrode and a sensor electrode, and the second touch electrode being the other of the control electrode and the sensor electrode; wherein each of the multiple touch units further comprises a dummy electrode, which is arranged separately from the first touch electrode and the second touch electrode, wherein, in the top view of the touch unit, the area fraction of the dummy electrode to the total area of ​​the touch unit is greater than 27% and less than or equal to 40%. [2] Touch sensor according to claim 1, wherein in one of the multiple touch units the first touch electrode comprises a first main electrode, a second main electrode and a bridge part, wherein the first main electrode and the second main electrode are connected via the bridge part and the bridge part is arranged in a different layer than the second touch electrode, wherein the second touch electrode comprises a third main electrode; wherein, in the top view of the touch sensor, the first main electrode and the second main electrode extend along the first direction and the third main electrode extends along the second direction, the first direction intersecting the second direction, and wherein the first main electrode is located on one side of the third main electrode and the second main electrode is located on the other side of the third main electrode; wherein the first main electrode, the second main electrode and the third main electrode define a first region, a second region, a third region and a fourth region, and wherein the dummy electrode is arranged in the first region, the second region, the third region and the fourth region. [3] Touch sensor according to claim 2, wherein the first touch electrode further comprises a first connecting electrode arranged in the first region and at least two first branch electrodes, wherein the first branch electrodes extend along a third direction, wherein the third direction intersects both the first direction and the second direction, wherein the first connecting electrode connects the at least two first branch electrodes and wherein one of the at least two first branch electrodes is connected to the first main electrode; wherein the second touch electrode further comprises a second connecting electrode arranged in the first region and at least two second branch electrodes, wherein the second branch electrodes extend along the third direction, wherein the second connecting electrode connects the at least two second branch electrodes and wherein one of the at least two second branch electrodes is connected to the third main electrode; wherein parts of the two adjacent first branch electrodes and the first connecting electrode are arranged around one of the second branch electrodes and parts of the two adjacent second branch electrodes and the second connecting electrode are arranged around one of the first branch electrodes; wherein the dummy electrode comprises a first dummy electrode and a second dummy electrode, wherein the first branch electrodes and the second branch electrodes are arranged alternately in a direction perpendicular to the third direction to form a first branch unit, wherein the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes and the second dummy electrode is arranged on the outer circumferential side of the first branch unit. [4] Touch sensor according to claim 3, wherein the first branch electrodes are provided with a first projection on the side facing the second branch electrode, wherein a first groove is formed between two adjacent first projections, wherein the second branch electrodes are provided with a second projection on the side facing the first branch electrode and a second groove is formed between two adjacent second projections, wherein a part of the first projection is arranged in the second groove and a part of the second projection is arranged in the first groove. [5] Touch sensor according to claim 4, wherein the first dummy electrode extends along the lateral contour of the first branch electrode. [6] Touch sensor according to claim 4, wherein one of the at least two first branch electrodes, which is closer to the first main electrode, is connected to the first main electrode via the first projection and wherein one of the at least two second branch electrodes, which is closer to the third main electrode, is connected to the third main electrode via the second projection. [7] Touch sensor according to claim 6, wherein a first recess is further arranged on the first branch electrode, wherein the first recess is arranged within the first projection and wherein the dummy electrode further comprises a third dummy electrode which is arranged in the first recess. [8] Touch sensor according to claim 7, wherein a second recess is further arranged on the second branch electrode, wherein the second recess is arranged within the second projection and wherein the dummy electrode further comprises a fourth dummy electrode which is arranged in the second recess. [9] Touch sensor according to claim 8, wherein in the top 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 arranged symmetrically with respect to the center line of the first main electrode and wherein the pattern of the touch unit in the first and third area and the pattern of the touch unit in the second and fourth area are arranged symmetrically with respect to the center line of the third main electrode. [10] Touch sensor according to any one of claims 2 to 9, wherein the first touch electrode and the second touch electrode are arranged in the same layer, wherein the third main electrode comprises a first main part, a connecting part of the main part and a second main part connected successively along the second direction, wherein the first main part is arranged on one side of the first main electrode and the second main part is arranged on the other side of the first main electrode; wherein a first opening is formed in the bridge part and, in the top view of the touch unit, the connecting part of the main part is arranged in the first opening. [11] Touch sensor according to claim 10, wherein a second opening is formed in a region of the first main part adjacent to the connecting part of the main part and a third opening is formed in a region of the second main part adjacent to the connecting part of the main part; wherein, in the top view of the touch unit, both the second opening and the third opening expose a part of the connecting part of the main part. [12] Display device comprising a display panel and a touch sensor, wherein the touch sensor is arranged on the light-emitting side of the display panel; wherein the touch sensor comprises multiple touch units, the multiple touch units being arranged along a first direction and a second direction, the first direction intersecting the second direction, wherein one of the multiple touch units comprises a first touch electrode and a second touch electrode arranged separately from each other, the first touch electrode being one of a control electrode and one of a sensor electrode, and the second touch electrode being the other of the control electrode and the sensor electrode; wherein each of the multiple touch units further comprises a dummy electrode, which is arranged separately from the first touch electrode and the second touch electrode, wherein, in the top view of the touch unit, the area fraction of the dummy electrode to the total area of ​​the touch unit is greater than 27% and less than or equal to 40%; wherein the display panel comprises several subpixels, wherein the first touch electrode and the second touch electrode are each designed in a grid shape and the grid openings of the first touch electrode and the second touch electrode correspond to the several subpixels, and wherein the several touch units are arranged in the display area of ​​the display panel. [13] Display device according to claim 12, wherein in one of the multiple touch units the first touch electrode comprises a first main electrode, a second main electrode and a bridge part, wherein the first main electrode and the second main electrode are connected via the bridge part and the bridge part is arranged in a different layer than the second touch electrode, wherein the second touch electrode comprises a third main electrode; wherein, in the top view of the touch sensor, the first main electrode and the second main electrode extend along the first direction and the third main electrode extends along the second direction, the first direction intersecting the second direction, and wherein the first main electrode is located on one side of the third main electrode and the second main electrode is located on the other side of the third main electrode; wherein the first main electrode, the second main electrode and the third main electrode define a first region, a second region, a third region and a fourth region, and wherein a dummy electrode is arranged in each of the first region, the second region, the third region and the fourth region. [14] Display device according to claim 13, wherein the first touch electrode further comprises a first connecting electrode arranged in the first region and at least two first branch electrodes, wherein the first branch electrodes extend along a third direction, the third direction intersecting both the first direction and the second direction, wherein the first connecting electrode connects the at least two first branch electrodes and wherein one of the at least two first branch electrodes is connected to the first main electrode; wherein the second touch electrode further comprises a second connecting electrode arranged in the first region and at least two second branch electrodes, wherein the second branch electrodes extend along the third direction, wherein the second connecting electrode connects the at least two second branch electrodes and wherein one of the at least two second branch electrodes is connected to the third main electrode; wherein parts of the two adjacent first branch electrodes and the first connecting electrode are arranged around one of the second branch electrodes and parts of the two adjacent second branch electrodes and the second connecting electrode are arranged around one of the first branch electrodes; wherein the dummy electrode comprises a first dummy electrode and a second dummy electrode, wherein the first branch electrodes and the second branch electrodes are arranged alternately in a direction perpendicular to the third direction to form a first branch unit, wherein the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes and the second dummy electrode is arranged on the outer circumferential side of the first branch unit. [15] Display device according to claim 14, wherein the first branch electrodes are provided with a first projection on the side facing the second branch electrode, wherein a first groove is formed between two adjacent first projections, wherein the second branch electrodes are provided with a second projection on the side facing the first branch electrode and a second groove is formed between two adjacent second projections, wherein a part of the first projection is arranged in the second groove and a part of the second projection is arranged in the first groove. [16] Display device according to claim 15, wherein the first dummy electrode extends along the lateral contour of the first branch electrode. [17] Display device according to claim 15, wherein one of the at least two first branch electrodes, which is closer to the first main electrode, is connected to the first main electrode via the first projection and wherein one of the at least two second branch electrodes, which is closer to the third main electrode, is connected to the third main electrode via the second projection. [18] Display device according to any one of claims 12 to 17, wherein the display panel comprises a luminaire layer and an encapsulation layer, wherein the encapsulation layer is arranged on the light-emitting side of the luminaire layer and the touch sensor is arranged on a side of the encapsulation layer facing away from the luminaire layer, wherein the encapsulation layer comprises a first inorganic layer, an organic layer and a second inorganic layer stacked successively; wherein the thickness of the organic layer is less than or equal to 8 micrometers. [19] Display device according to claim 13, wherein the first touch electrode further comprises a first connecting electrode arranged in the first region and at least two first branch electrodes, wherein the first branch electrodes extend along a third direction, the third direction intersecting both the first direction and the second direction, wherein the first connecting electrode connects the at least two first branch electrodes and wherein one of the at least two first branch electrodes is connected to the first main electrode; wherein the second touch electrode further comprises a second connecting electrode arranged in the first region and at least two second branch electrodes, wherein the second branch electrodes extend along the third direction, wherein the second connecting electrode connects the at least two second branch electrodes and wherein one of the at least two second branch electrodes is connected to the third main electrode; wherein parts of the two adjacent first branch electrodes and the first connecting electrode are arranged around one of the second branch electrodes and parts of the two adjacent second branch electrodes and the second connecting electrode are arranged around one of the first branch electrodes; wherein the dummy electrode comprises a first dummy electrode, wherein the first branch electrodes and the second branch electrodes are arranged alternately in a direction perpendicular to the third direction to form a first branch unit, wherein the first dummy electrode is arranged between adjacent first branch electrodes and second branch electrodes; wherein in a direction perpendicular to the third direction, the first dummy electrode spans at least one subpixel. [20] Display device according to one of claims 12 to 17, wherein the display device further comprises a cover plate arranged on a side of the touch sensor facing away from the display panel, wherein the cover plate comprises at least two layered film layers arranged one above the other and wherein the thickness of the cover plate is less than or equal to 500 micrometers.

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