Touch screen, display module and electronic equipment
Redesigning touch screen electrodes in a strip-shaped configuration addresses high impedance and signal detection challenges, enhancing performance by reducing impedance and improving signal detection in touch screens.
Patent Information
- Application Number
- CN202310688400.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-09
- Publication Date
- 2024-12-10
AI Technical Summary
Existing touch screens face issues with high impedance and difficulty in signal detection due to diamond or cross-shaped driving and sensing electrodes, affecting performance indicators such as signal-to-noise ratio, suspension performance, and linear accuracy.
The electrodes are redesigned in a strip-shaped configuration, with first electrodes being strip-shaped and second electrodes comprising multiple segment electrodes, allowing for continuous conductivity in specific directions, thereby shortening current flow paths and increasing junction boundaries for improved signal detection.
This design reduces impedance and enhances signal detection, improving the overall performance of the touch screen by facilitating easier signal detection and maintaining optimal signal ratios.
Smart Images
Figure CN119105667A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of touch screens, and in particular to a touch screen, a display module and an electronic device. Background Art
[0002] At present, touch screens are very common in electronic devices and are an important medium for human-computer interaction. A touch screen generally includes driving electrodes and sensing electrodes, wherein the driving electrodes and the sensing electrodes are arranged alternately.
[0003] In the related art, the driving electrodes and sensing electrodes on the touch screen are generally designed in a diamond or cross shape. However, such a design generally has the problem that the driving electrodes and sensing electrodes have large impedances and the signals are difficult to detect, thereby affecting the performance of the touch screen. Summary of the invention
[0004] Based on this, it is necessary to provide a touch screen, a display module and an electronic device that can improve the performance of the touch screen in order to address the above technical problems.
[0005] In a first aspect, the present application provides a touch screen. The touch screen comprises: a plurality of touch control units arranged in an array;
[0006] The touch control unit includes: a plurality of first electrodes and a plurality of second electrodes arranged alternately along a first direction, wherein the first electrodes are strip-shaped, and the length direction of the first electrodes is a second direction perpendicular to the first direction, and the second electrodes include a plurality of segment electrodes arranged along the second direction in a separated manner, and the segment electrodes are strip-shaped, and the length direction of the segment electrodes is the second direction; the plurality of segment electrodes included in each of the second electrodes are continuously conductive in the second direction, and the plurality of first electrodes are continuously conductive in the first direction.
[0007] In a second aspect, the present application further provides a display module, wherein the display module comprises a display screen and a touch screen as described in the first aspect, wherein the touch screen and the display screen are bonded to each other.
[0008] In a third aspect, the present application further provides an electronic device, wherein the electronic device comprises the display module as described in the second aspect.
[0009] The present application provides a touch screen, a display module and an electronic device, wherein the touch screen includes a plurality of touch control units arranged in an array, and the touch control units include: a plurality of first electrodes and a plurality of second electrodes arranged in an interlaced manner along a first direction, wherein the first electrodes are strip-shaped, and the length direction of the first electrodes is a second direction perpendicular to the first direction, and the second electrodes include a plurality of segment electrodes arranged in a partitioned manner along the second direction, and the segment electrodes are strip-shaped, and the length direction of the segment electrodes is the second direction, and the plurality of segment electrodes included in each second electrode are continuously conductive in the second direction, and the plurality of first electrodes are continuously conductive in the first direction. Since the electrodes in the touch screen provided by the present application are all strip-shaped, therefore, compared with the diamond-shaped and cross-shaped electrode designs, the current flow path can be shortened, thereby effectively reducing the impedance value of the electrode. In addition, the strip-shaped design can increase the boundary length of the junction between the first electrode and the second electrode, thereby improving the signal ratio when a finger touches the touch screen, making the signal easier to detect, thereby improving the performance of the touch screen. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of a touch screen in the prior art;
[0011] Figure 2 is a schematic diagram of a touch screen in one embodiment;
[0012] Figure 3 is a schematic diagram of a touch control unit in one embodiment;
[0013] Figure 4 is a schematic diagram of a touch unit in another embodiment;
[0014] Figure 5 is a cross-sectional view of a touch screen in one embodiment;
[0015] Figure 6 is a schematic diagram of a touch unit in another embodiment;
[0016] Figure 7 is a schematic diagram of a touch unit in another embodiment;
[0017] Figure 8 is a schematic diagram of a touch screen in another embodiment;
[0018] Fig. 9 is a schematic diagram of a touch unit in another embodiment;
[0019] Fig.10 is a schematic diagram of a touch unit in another embodiment;
[0020] Fig.11 is a schematic diagram of a touch unit in another embodiment;
[0021] Fig.12 is a schematic diagram of a touch unit in another embodiment;
[0022] Fig.13 is a schematic diagram of a touch unit in another embodiment;
[0023] Fig.14 FIG. 4 is a schematic diagram of a touch unit in another embodiment. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0026] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.
[0027] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.
[0028] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.
[0029] At present, touch screens (English: Touch Panel; abbreviated: TP) are already quite common in electronic devices. They are an important carrier for realizing human-computer interaction and a panel that can detect touch events. Generally speaking, a touch screen may include a plurality of driving electrodes (abbreviated: Tx) and a plurality of sensing electrodes (abbreviated: Rx) arranged in an interlaced manner, such as Figure 1 FIG. 1 is a schematic diagram of a typical touch screen.
[0030] In practical applications, the Tx and Rx in the touch screen can generally be designed in a diamond shape or a cross shape. Figure 1 The Tx and Rx of the touch screen shown are designed in a diamond shape. However, this design method generally has the problem that the Tx and Rx impedance is large and the signal is difficult to detect, which affects the key performance indicators of the touch screen such as signal-to-noise ratio (SNR), suspension performance (Low Ground Mass) and linear accuracy.
[0031] In view of this, an embodiment of the present application provides a touch screen, in which electrodes (Tx and Rx) are designed to be strip-shaped. This design, on the one hand, can shorten the current flow path compared to diamond-shaped and cross-shaped electrode designs, thereby effectively reducing the impedance value of the electrode. On the other hand, the strip-shaped design can increase the boundary length between Tx and Rx, thereby improving the signal ratio when a finger touches the touch screen, making the signal easier to detect, thereby improving the performance of the touch screen.
[0032] Please refer to Figure 2 , which shows an exemplary touch screen provided by an embodiment of the present application, such as Figure 2 As shown, the touch screen includes a plurality of touch control units 201 arranged in an array, wherein any two adjacent touch control units 201 are electrically connected.
[0033] Please refer to Figure 3 , which is a diagram of the touch unit 201, such as Figure 3 As shown, the touch unit 201 includes a plurality of first electrodes d1 and a plurality of second electrodes d2 that are alternately arranged along a first direction f1.
[0034] Optionally, the first direction f1 can be the x-axis direction in the plane coordinate system, which is commonly referred to as the lateral direction. Of course, in an optional embodiment of the present application, the first direction f1 can also be the y-axis direction in the plane coordinate system, which is commonly referred to as the longitudinal direction. The embodiment of the present application only takes the first direction f1 as the x-axis direction in the plane coordinate system as an example for explanation.
[0035] Optionally, the first electrode d1 may be one of Tx and Rx, and the second electrode d2 may be the other of Tx and Rx. The embodiment of the present application is described by taking the first electrode d1 as Tx and the second electrode d2 as Rx as an example.
[0036] It should be noted that, in an optional embodiment of the present application, the first electrode d1 and the second electrode d2 may both be made of a metal mesh (English: Metal Mesh; abbreviated: MM). Figure 3 The mesh mark in is only used to distinguish the first electrode d1 from the second electrode d2, and is not used to show the specific shape of the metal mesh. In practical applications, the metal mesh may be a diamond mesh.
[0037] like Figure 3 As shown, the staggered arrangement of multiple first electrodes d1 and multiple second electrodes d2 along the first direction f1 may refer to: arranging the multiple first electrodes d1 and the multiple second electrodes d2 along the first direction f1 in the following order: first electrode d1, second electrode d2, first electrode d1, second electrode d2... In other words, a second electrode d2 can be set between two first electrodes d1.
[0038] It should be pointed out that although Figure 3 It is shown that the touch control unit 201 includes four first electrodes d1 and three second electrodes d2, but the reader should understand that in actual applications, more or fewer electrodes than four first electrodes d1 and three second electrodes d2 may be provided.
[0039] Please continue to refer to Figure 3 ,like Figure 3 As shown, the first electrode d1 is strip-shaped, and the length direction of the first electrode d1 is the second direction f2 perpendicular to the first direction f1. The second electrode d2 includes a plurality of segment electrodes jd arranged along the second direction f2. The segment electrodes jd are strip-shaped, and the length direction of the segment electrodes jd is the second direction f2.
[0040] As described above, the first direction f1 can be the x-axis direction in the plane coordinate system, which is commonly known as the lateral direction. In this case, the second direction f2 can be the y-axis direction in the plane coordinate system, which is commonly known as the longitudinal direction. In addition, in an optional embodiment of the present application, the first direction f1 can also be the y-axis direction in the plane coordinate system, which is commonly known as the longitudinal direction. In this case, the second direction f2 can be the x-axis direction in the plane coordinate system, which is commonly known as the lateral direction. The embodiment of the present application only takes the second direction f2 as the y-axis direction in the plane coordinate system as an example for explanation.
[0041] like Figure 3As shown, the partition setting means that two adjacent segment electrodes jd are separated by a partition area.
[0042] It should be pointed out that although Figure 3 It is shown in FIG. 1 that the second electrode d2 includes three segment electrodes jd (jd1, jd2 and jd3 respectively), but the reader should understand that in actual applications, more or fewer segment electrodes than three segment electrodes jd may be provided.
[0043] In addition, in the touch control unit 201 provided in the embodiment of the present application, the plurality of segment electrodes jd included in each second electrode d2 are continuously conductive in the second direction f2, and the plurality of first electrodes d1 are continuously conductive in the first direction f1.
[0044] The touch screen provided in the present embodiment comprises a plurality of touch control units arranged in an array, wherein the touch control units comprise: a plurality of first electrodes and a plurality of second electrodes arranged in an alternating manner along a first direction, wherein the first electrodes are in a strip shape, the length direction of the first electrodes is a second direction perpendicular to the first direction, the second electrodes comprise a plurality of segment electrodes arranged in a partitioned manner along the second direction, the segment electrodes are in a strip shape, and the length direction of the segment electrodes is the second direction, the plurality of segment electrodes comprised by each second electrode are continuously conductive in the second direction, and the plurality of first electrodes are continuously conductive in the first direction. Since the electrodes in the touch screen provided in the present embodiment are all in a strip shape, the current flow path can be shortened compared to the diamond-shaped and cross-shaped electrode designs, thereby effectively reducing the impedance value of the electrode. In addition, the strip-shaped design can increase the boundary length of the junction between the first electrode and the second electrode, thereby improving the signal ratio when a finger touches the touch screen, making the signal easier to detect, thereby improving the performance of the touch screen.
[0045] Next, the embodiment of the present application will provide an optional implementation method of "the plurality of segment electrodes jd included in each second electrode d2 are continuously conductive in the second direction f2, and the plurality of first electrodes d1 are continuously conductive in the first direction f1".
[0046] like Figure 4 As shown, two adjacent segment electrodes jd in each second electrode d2 are electrically connected through a connecting bridge b (English: Bridge), and two adjacent first electrodes d1 are electrically connected through a connecting electrode ld. The connecting electrode ld is located in the partition area between the two adjacent segment electrodes jd, and the connecting bridge b and the connecting electrode ld are insulated from each other.
[0047] In an optional embodiment of the present application, the connecting electrode 1d and the connecting bridge b may both be made of metal meshes.
[0048] In an optional embodiment of the present application, the metal grid of the connecting electrode 1d and the metal grid of the first electrode d1 may be connected as one. In other words, the connecting electrode 1d may be regarded as a part of the first electrode d1.
[0049] Please refer to Figure 5 , which shows a cross-sectional view of a touch screen, such as Figure 5 As shown, in an optional embodiment of the present application, the touch screen includes a first metal layer jc1, a first inorganic functional layer wg1 and a second metal layer jc2 in the thickness direction, wherein the first inorganic functional layer wg1 is arranged between the first metal layer jc1 and the second metal layer jc2, and the plurality of first electrodes d1, the plurality of second electrodes d2 and the connecting electrode ld ( Figure 5 Not shown) are located in the first metal layer jc1, the connecting bridge b is located in the second metal layer jc2, and the connecting bridge b is electrically connected to the segment electrode jd through a via k provided in the first inorganic functional layer wg1.
[0050] Since the connection bridge b and the connection electrode 1d are located in different metal layers and separated by the first inorganic functional layer wg1, the insulation between the connection bridge b and the connection electrode 1d can be ensured.
[0051] Please continue to refer to Figure 5 ,like Figure 5 As shown, the touch screen further includes a second inorganic functional layer wg2 and an organic protective layer yb, wherein the second inorganic functional layer wg2 is arranged on a side of the second metal layer jc2 away from the first inorganic functional layer wg1, and the organic protective layer yb is arranged on a side of the first metal layer jc1 away from the first inorganic functional layer wg1.
[0052] Please refer back to Figure 3 and Figure 4 ,like Figure 3 and Figure 4 As shown, the second electrode d2 includes a first segment electrode jd1, a second segment electrode jd2 and a third segment electrode jd3 arranged in sequence along the second direction f2, wherein the widths of the first segment electrode jd1, the second segment electrode jd2 and the third segment electrode jd3 are consistent, and the lengths of the first segment electrode jd1 and the third segment electrode jd3 are consistent, and are both half the length of the second segment electrode jd2.
[0053] In practical applications, the second electrode d2 in the touch unit 201 needs to be conductive in the first direction f1. The embodiments of the present application provide two exemplary methods for ensuring that the second electrode d2 is conductive in the first direction f1.
[0054] In the first type, in the touch control unit 201 , the first segment electrode jd1 in each second electrode d2 is conductive in the first direction f1 , and / or the third segment electrode jd3 in each second electrode d2 is conductive in the first direction f1 .
[0055] Specifically, please refer to Figure 6 In the case where the first segment electrode jd1 in each second electrode d2 is conductive in the first direction f1, the touch control unit 201 further includes a first connecting electrode lt1 disposed between every two adjacent first segment electrodes jd1, and the first connecting electrode lt1 is used to electrically connect the two adjacent first segment electrodes jd1. In the case where the third segment electrode jd3 in each second electrode d2 is conductive in the first direction f1, the touch control unit 201 further includes a second connecting electrode lt2 disposed between every two adjacent third segment electrodes jd3, and the second connecting electrode lt2 is used to electrically connect the two adjacent third segment electrodes jd3.
[0056] It should be pointed out that although Figure 6 The first connecting electrode lt1 and the second connecting electrode lt2 are shown in the figure, but the reader should understand that in practical applications, only the first connecting electrode lt1 can be set alone, only the second connecting electrode lt2 can be set alone, or the first connecting electrode lt1 and the second connecting electrode lt2 can be set at the same time.
[0057] It should also be noted that the first communication electrode lt1 and the second communication electrode lt2 may both be made of metal meshes.
[0058] In an optional embodiment of the present application, the metal grid of the first connecting electrode lt1 and the metal grid of the first segment electrode jd1 can be connected as one, in other words, the first connecting electrode lt1 can be regarded as a part of the first segment electrode jd1, and similarly, the metal grid of the second connecting electrode lt2 and the metal grid of the third segment electrode jd3 can be connected as one, in other words, the second connecting electrode lt2 can be regarded as a part of the third segment electrode jd3.
[0059] In the second type, in the touch control unit 201 , adjacent first segment electrodes jd1 are insulated from each other in the first direction f1 , and adjacent third segment electrodes jd3 are also insulated from each other in the first direction f1 .
[0060] Please refer to Figure 7 ,like Figure 7As shown, a dummy electrode x (English: Dummy) is arranged between adjacent first segment electrodes jd1. At the same time, a dummy electrode x is also arranged between adjacent third segment electrodes jd3. By setting the dummy electrode x, it can be ensured that adjacent first segment electrodes jd1 are insulated from each other in the first direction f1, and adjacent third segment electrodes jd3 are also insulated from each other in the first direction f1.
[0061] In this case, the first segment electrode jd1 in each second electrode d2 in the touch control unit 201 at the first edge of the touch screen in the second direction f2 is electrically connected through a metal wiring, and / or, the third segment electrode jd3 in each second electrode d2 in the touch control unit 201 at the second edge of the touch screen in the second direction f2 is electrically connected through a metal wiring.
[0062] Please refer to Figure 8 The touch unit marked with an oblique line is the touch unit 201 at the first edge of the touch screen in the second direction f2, or in layman's terms, the touch unit at the very beginning in the longitudinal direction. In addition, the touch unit marked with a horizontal line is the touch unit 201 at the second edge of the touch screen in the second direction f2, or in layman's terms, the touch unit at the very end in the longitudinal direction.
[0063] It should be noted that the metal wiring may be a metal wiring arranged along the first direction f1, that is, a metal wiring arranged in a transverse direction.
[0064] It should also be noted that the metal wiring can be connected to the touch chip to achieve the connection between the second electrode d2 in the touch screen and the touch chip. Of course, it should be noted that, in the case where the metal wiring is not arranged in the manner described above, in order to ensure that the first electrode d1 and the second electrode d2 are connected to the touch chip, additional metal wiring can also be arranged according to design requirements.
[0065] Please refer back to Figure 3 and Figure 4 ,like Figure 3 and Figure 4 As shown, the touch control unit 201 includes four first electrodes d1 arranged along the first direction f1, wherein the lengths of the first electrodes d1 are equal, the widths of the two first electrodes d1 located at the middle position are equal, the widths of the two first electrodes d1 located at the edge position are equal, and the widths of the two first electrodes d1 located at the edge position are half of the widths of the two first electrodes d1 located at the middle position.
[0066] Please refer to Fig. 9 ,like Fig. 9As shown, virtual electrodes x are arranged at the edges of two first electrodes d1 at the edge positions in the second direction f2, so that the first electrodes d1 at the edge positions in two adjacent touch control units are insulated in the second direction f2.
[0067] In an optional embodiment of the present application, the first electrode d1 and the second electrode d2 are separated by a break or a virtual electrode, so that the first electrode d1 and the second electrode d2 are insulated from each other.
[0068] In an optional embodiment of the present application, the width of the fracture is less than or equal to 5 μm. In an optional embodiment of the present application, the width of the virtual electrode is less than or equal to 2 times the pixel width and greater than or equal to one-half the pixel width, where the pixel width is the width of the pixel in the display screen disposed below the touch screen in the display module.
[0069] The width design of the fracture and the width design of the virtual electrode are obtained by the inventor of the present application after a large number of experiments. The experiments have proved that such a width design can make the mutual capacitance value of the first electrode d1 and the second electrode d2 within an appropriate range, thereby maximizing the performance of the touch screen.
[0070] Please refer to Fig.10 In an optional embodiment of the present application, a virtual electrode x is disposed inside the first electrode d1; and / or a virtual electrode x is disposed inside the segment electrode jd.
[0071] Setting a virtual electrode x inside the electrode (first electrode d1 and / or segment electrode jd) can reduce the parasitic capacitance between the electrode in the touch screen and the cathode in the display screen arranged below the touch screen. Generally speaking, if the parasitic capacitance between the electrode in the touch screen and the cathode in the display screen arranged below the touch screen is too large, it will cause the signal amount to decrease and the signal attenuation to increase. Therefore, setting a virtual electrode x inside the electrode (first electrode d1 and / or segment electrode jd) of the touch screen can effectively increase the signal amount and reduce the signal attenuation, thereby improving the performance of the touch screen.
[0072] In an optional embodiment of the present application, when a virtual electrode x is provided inside the first electrode d1, the virtual electrode x provided inside the first electrode d1 is located in the non-DC current region; and when a virtual electrode x is provided inside the segmented electrode jd, the virtual electrode x provided inside the segmented electrode jd is located in the non-DC current region, wherein the non-DC current region is a region that does not include a current flow path.
[0073] By arranging the virtual electrode x in the non-DC region, the increase of the current flow path can be avoided, thereby avoiding the increase of the impedance of the electrode in the touch screen, and thus avoiding the problem of signal quantity reduction and increased signal attenuation.
[0074] It should be pointed out that the above Figures 3 to 10 The various electrode elements shown in the figure can be combined with each other to form different examples of touch control units 201, all of which are within the protection scope of the present application. In order to simplify the description, the present application embodiment does not describe all the combinations, but only gives Figures 11 to 14 Four representative examples of touch control units 201 are shown.
[0075] In an optional embodiment of the present application, the basic mutual capacitance value of the first electrode and the second electrode in the touch screen may be less than or equal to 1.2 pf, the proportion of the capacitance change caused by a finger touching the touch screen may be greater than or equal to 20%, the parasitic capacitance between Tx and the cathode in the display screen arranged below the touch screen may be less than or equal to 12 pf, the parasitic capacitance between Rx and the cathode in the display screen arranged below the touch screen may be less than or equal to 12 pf, the impedance value of Tx is less than or equal to 25 ohms, and the impedance value of Rx is less than or equal to 25 ohms.
[0076] The embodiment of the present application further provides a display module, wherein the display module includes a display screen and a touch screen provided in the above embodiment, wherein the touch screen and the display screen are bonded to each other. In an optional embodiment of the present application, the display screen may be an OLED display screen. It should be noted that the orthographic projection of the metal grid of each electrode in the touch screen may be located at the gap between the pixels of the display screen, so as to avoid affecting the display of the display screen.
[0077] An embodiment of the present application also provides an electronic device, which includes the display module provided in the above embodiment. Optionally, the electronic device can be a mobile phone, a tablet computer, a smart TV, a wearable device, etc. The embodiment of the present application does not limit the type of electronic device.
[0078] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0079] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.
Claims
1. A touch screen, It is characterized in that The touch screen includes a plurality of touch control units arranged in an array; The touch control unit comprises: a plurality of first electrodes and a plurality of second electrodes arranged in a staggered manner along a first direction, wherein the first electrodes are strip-shaped, and the length direction of the first electrodes is a second direction perpendicular to the first direction, and the second electrodes comprise a plurality of segment electrodes arranged in a partitioned manner along the second direction, and the segment electrodes are strip-shaped, and the length direction of the segment electrodes is the second direction; The plurality of segment electrodes included in each of the second electrodes are continuously conductive in the second direction, and the plurality of first electrodes are continuously conductive in the first direction.
2. The touch screen according to claim 1, It is characterized in that Two adjacent segment electrodes in each of the second electrodes are electrically connected via a connecting bridge, and two adjacent first electrodes are electrically connected via a connecting electrode. The connecting electrode is located in a partition area between two adjacent segment electrodes, and the connecting bridge and the connecting electrode are insulated from each other.
3. The touch screen according to claim 2, It is characterized in that The touch screen comprises a first metal layer, a first inorganic functional layer and a second metal layer in a thickness direction, wherein the first inorganic functional layer is arranged between the first metal layer and the second metal layer; The plurality of first electrodes, the plurality of second electrodes and the connecting electrode are all located in the first metal layer, the connecting bridge is located in the second metal layer, and the connecting bridge is electrically connected to the segment electrode through a via hole arranged in the first inorganic functional layer.
4. The touch screen according to claim 3, It is characterized in that The touch screen further includes a second inorganic functional layer and an organic protective layer; The second inorganic functional layer is disposed on a side of the second metal layer away from the first inorganic functional layer, and the organic protective layer is disposed on a side of the first metal layer away from the first inorganic functional layer.
5. The touch screen according to any one of claims 1 to 4, It is characterized in that The second electrode includes a first segment electrode, a second segment electrode and a third segment electrode arranged in sequence along the second direction, wherein the widths of the first segment electrode, the second segment electrode and the third segment electrode are consistent, and the lengths of the first segment electrode and the third segment electrode are consistent, and both are half the length of the second segment electrode.
6. The touch screen according to claim 5, It is characterized in that The first segment electrodes in each of the second electrodes are conductive in the first direction; and / or, The third segment electrodes in each of the second electrodes are conductive in the first direction.
7. The touch screen according to claim 6, It is characterized in that In the case where the first segment electrodes in each of the second electrodes are conductive in the first direction, the touch control unit further comprises a first connecting electrode disposed between every two adjacent first segment electrodes, the first connecting electrode being used to electrically connect two adjacent first segment electrodes; When the third segment electrodes in each of the second electrodes are conductive in the first direction, the touch control unit further includes a second connecting electrode disposed between every two adjacent third segment electrodes, and the second connecting electrode is used for electrically connecting two adjacent third segment electrodes.
8. The touch screen according to claim 5, It is characterized in that The first segment electrodes in each of the second electrodes in the touch control unit at the first edge of the touch screen in the second direction are electrically connected via metal wiring; and / or, The third segment electrodes in each of the second electrodes in the touch control units at the second edge of the touch screen in the second direction are electrically connected through a metal wiring.
9. The touch screen according to any one of claims 1 to 4, It is characterized in that The touch control unit includes four first electrodes arranged along the first direction, wherein the lengths of the first electrodes are equal, the widths of the two first electrodes located at the middle position are equal, the widths of the two first electrodes located at the edge position are equal, and the width of the two first electrodes located at the edge position is half of the width of the two first electrodes located at the middle position.
10. The touch screen according to claim 9, It is characterized in that Virtual electrodes are arranged at the edges of the two first electrodes at the edge positions in the second direction, so that the first electrodes at the edge positions in two adjacent touch control units are insulated in the second direction.
11. The touch screen according to any one of claims 1 to 4, It is characterized in that The first electrode and the second electrode are separated by a break or a virtual electrode, so that the first electrode and the second electrode are insulated from each other.
12. The touch screen according to claim 11, It is characterized in that The width of the fracture is less than or equal to 5 μm.
13. The touch screen according to claim 11, It is characterized in that The width of the virtual electrode is less than or equal to twice the pixel width and greater than or equal to one-half the pixel width, where the pixel width is the width of a pixel in a display screen disposed below the touch screen in a display module.
14. The touch screen according to any one of claims 1 to 4, It is characterized in that A virtual electrode is arranged inside the first electrode; and / or, A virtual electrode is arranged inside the segment electrode.
15. The touch screen according to claim 14, It is characterized in that In the case where a virtual electrode is disposed inside the first electrode, the virtual electrode disposed inside the first electrode is located in a non-DC region; In the case where a virtual electrode is arranged inside the segment electrode, the virtual electrode arranged inside the segment electrode is located in a non-DC region; The non-DC region is a region that does not include a current flow path.
16. The touch screen according to any one of claims 1 to 4, It is characterized in that The first electrode is one of the RX electrode and the TX electrode, and the second electrode is the other of the RX electrode and the TX electrode.
17. The touch screen according to any one of claims 1 to 4, It is characterized in that The first electrode and the second electrode are both made of metal meshes.
18. A display module, It is characterized in that The display module comprises a display screen and a touch screen as described in any one of claims 1 to 17, wherein the touch screen and the display screen are bonded to each other.
19. An electronic device, It is characterized in that The electronic device comprises the display module as claimed in claim 18.