Touch structure, touch display panel and display device
By introducing a third sub-electrode into the touch structure to form lateral and front-facing area electric field lines, the problem of insufficient touch signal quantity in flexible AMOLED display panels is solved, improving touch sensitivity and user interaction experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-10
- Publication Date
- 2026-04-03
AI Technical Summary
Flexible AMOLED on-cell display panels suffer from reduced touch signal quantity and lower touch sensitivity due to the use of materials with lower dielectric constants and the wearing of gloves by users, which affects the smoothness of the user interaction experience.
A third sub-electrode is introduced into the touch structure. It is insulated from and electrically connected to the first and second sub-electrodes to form lateral electric field lines and front-facing area electric field lines, thereby enhancing the mutual capacitance signal and improving touch sensitivity.
It significantly improves the mutual capacitance signal quantity and capacitance change rate of the touch structure, enhances touch sensitivity and reliability, and improves the smoothness of user interaction experience.
Smart Images
Figure CN121785485A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to a touch structure, a touch display panel, and a display device. Background Technology
[0002] Capacitive touchscreens are widely used in various electronic interactive devices due to their high durability, long lifespan, and support for multi-touch functionality. The working principle of a capacitive touchscreen is to detect the specific location of a finger touch by detecting changes in capacitance at the finger's touch position.
[0003] In related technologies, for flexible AMOLED (Active-matrix organic light-emitting diode) On-cell (integrating a touch layer on the AMOLED cover) display panels, the amount of touch signal is reduced due to factors such as the use of materials with low dielectric constant (such as microcrystalline glass cover, low dielectric constant polarizer, low dielectric constant optical adhesive, etc.) and users wearing gloves to touch, resulting in reduced touch sensitivity and affecting the smoothness of the user interaction experience. Summary of the Invention
[0004] This application provides a touch structure, a touch display panel, and a display device to at least partially solve the above-mentioned technical problems.
[0005] To achieve the above objectives, according to a first aspect of this application, a touch structure is provided, comprising: The first touch electrode layer includes a plurality of first sub-electrodes arranged along a first direction and a plurality of second sub-electrodes arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other. The second touch electrode layer is stacked with the first touch electrode layer along a third direction, and the second touch electrode layer includes a plurality of third sub-electrodes; Wherein, the first sub-electrode is insulated from the second sub-electrode, the first sub-electrode is insulated from the third sub-electrode, and the third sub-electrode is electrically connected to the second sub-electrode; On a projection plane perpendicular to the third direction, the projection of the third sub-electrode at least partially overlaps with the projection of the first sub-electrode.
[0006] Optionally, in some embodiments of this application, the second sub-electrode includes a second body and a second connecting portion, the second connecting portion being located at the edge of the second body, and the second connecting portion being electrically connected to the third sub-electrode; Alternatively, the third sub-electrode includes a third body and a third connecting portion, the third connecting portion being located at the edge of the third body and electrically connected to the second sub-electrode; Alternatively, the second sub-electrode includes a second body and a second connecting portion, the second connecting portion being located at the edge of the second body, and the third sub-electrode includes a third body and a third connecting portion, the third connecting portion being located at the edge of the third body; the second connecting portion and the third connecting portion are electrically connected.
[0007] Optionally, in some embodiments of this application, the second body includes: The second main branch extends along the second direction; At least two second branches are located on either side of the second main trunk along the first direction; At least one of the second connecting portions is connected to the edge of the second branch portion; And / or, the third subject includes: The third main branch extends along the first direction; The third branch is located on both sides of the third main trunk along the second direction; At least one of the third connecting portions is connected to the edge of the third branch.
[0008] Optionally, in some embodiments of this application, one of the first sub-electrode and the second sub-electrode is configured to load a driving signal, and the other of the first sub-electrode and the second sub-electrode is configured to load a sensing signal. One of the first sub-electrode and the third sub-electrode is configured to load a driving signal, and the other of the first sub-electrode and the third sub-electrode is configured to load a sensing signal.
[0009] Optionally, in some embodiments of this application, the second touch electrode layer further includes: Multiple fourth sub-electrodes are insulated from the third sub-electrode; The plurality of third sub-electrodes are arranged along the first direction, and the plurality of fourth sub-electrodes are arranged along the second direction; the fourth sub-electrodes are electrically connected to the first sub-electrodes. On a projection plane perpendicular to the third direction, the projection of the fourth sub-electrode at least partially overlaps with the projection of the second sub-electrode.
[0010] Optionally, in some embodiments of this application, the touch structure further includes: A first insulating layer is disposed between the first touch electrode layer and the second touch electrode layer, and the first insulating layer has a third through hole disposed through the third direction; Multiple first sub-electrodes are continuously connected along a first direction, and multiple second sub-electrodes are insulated and isolated along a second direction; The second touch electrode layer also includes: The bridging sub-electrode is electrically connected to two adjacent second sub-electrodes along the second direction via the third via.
[0011] Optionally, in some embodiments of this application, the first touch electrode layer further includes: The conductive portion is connected between two adjacent first sub-electrodes along the first direction; On the projection plane perpendicular to the third direction, the projection of the bridging sub-electrode at least partially coincides with the projection of the conductive portion.
[0012] Optionally, in some embodiments of this application, the first touch electrode layer includes a first mesh channel line, the first sub-electrode is configured to be formed by a portion of the first mesh channel line, the second sub-electrode is configured to be formed by another portion of the first mesh channel line, and the first mesh channel line forming a portion of the first sub-electrode is disconnected from the first mesh channel line forming the other portion of the second sub-electrode. And / or, the second touch electrode layer includes a second mesh channel line, and the third sub-electrode is configured to be formed by at least a portion of the second mesh channel line.
[0013] According to a second aspect of this application, a touch display panel is provided, comprising: Display layer; An encapsulation layer is disposed on the display layer; A touch layer is disposed on the encapsulation layer, and the touch layer includes the touch electrode structure as described above.
[0014] According to a third aspect of this application, a display device is also provided, including the touch display panel as described above.
[0015] In the touch structure of this application embodiment, by setting a first sub-electrode and a second sub-electrode to generate lateral electric field lines, a third sub-electrode is added, so that electric field lines with opposite areas can be generated between the third sub-electrode and the first sub-electrode. This significantly increases the amount of mutual capacitance signal that the touch structure can generate, as well as the amount and rate of capacitance change during touch, thereby improving touch sensitivity and reliability. This enables more precise and efficient touch operation and enhances the smoothness of the user interaction experience.
[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0018] Figure 1 This is a cross-sectional view of the touch structure provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the distribution of electric field lines in a portion of the touch structure provided in an exemplary embodiment of this disclosure; Figure 3 This is a schematic diagram of the structure of the first touch electrode layer in the touch structure provided in the exemplary embodiment of this disclosure; Figure 4 This is a schematic diagram of the structure of the second touch electrode layer in the touch structure provided in the exemplary embodiment of this disclosure; Figure 5 This is a cross-sectional view of another location of the touch structure provided in an exemplary embodiment of this disclosure; Figure 6 This is a cross-sectional view of another location of the touch structure provided in an exemplary embodiment of this disclosure; Figure 7 yes Figure 3 An enlarged schematic diagram of part A in the middle; Figure 8 yes Figure 4 An enlarged schematic diagram of section C; Figure 9 yes Figure 3 Enlarged schematic diagram of part B in the middle; Figure 10 yes Figure 4 An enlarged schematic diagram of section D in the middle; Figure 11 This is a schematic diagram of the structure of the first mesh channel line or the second mesh channel line in the touch structure provided in the exemplary embodiments of this disclosure; Figure 12 This is a schematic diagram of the touch structure provided in an exemplary embodiment of this disclosure.
[0019] Explanation of reference numerals in the attached figures: 100. Touchscreen structure; 110. First touch electrode layer; 111, First sub-electrode; M1, First main body; 111a, First main body; 111b, First branch; 111c, First connecting part; 112, Second sub-electrode; M2, Second main body; 112a, Second main body; 112b, Second branch; 112c, Second connecting part; 113. Conductor section; 110a, First mesh channel line; 110b, Second mesh channel line; 120. Second touch electrode layer; 121, Third sub-electrode; M3, Third main body; 121a, Third main body; 121b, Third branch; 121c, Third connecting part; 122, Fourth sub-electrode; M4, Fourth main body; 122a, Fourth main trunk; 122b, Fourth branch; 122c, Fourth connecting part; 123. Bridging sub-electrode; 130. First insulating layer; 131. First via; 132. Second via; 133. Third via; 140. Second insulating layer; 150. Substrate; 10. Touch display panel; 210. Display layer; 220. Encapsulation layer; 230. Touch layer; 240. Functional layer; Y, first direction; X, second direction; Z, third direction. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0021] In the description of this application, it should be understood that the terms "length," "width," "thickness," "upper," "lower," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.
[0022] In this application, unless otherwise expressly specified and limited, the term "above" or "below" a second feature may include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them.
[0023] In related technologies, for flexible AMOLED (Active-matrix organic light-emitting diode) On-cell displays (with a touch layer 230 integrated on the AMOLED cover), the amount of touch signal decreases due to factors such as the use of materials with low dielectric constant (e.g., microcrystalline glass cover, low dielectric constant polarizer, low dielectric constant optical adhesive, etc.), user wearing gloves, and stylus operation. This results in reduced touch sensitivity and affects the smoothness of the user's interactive experience.
[0024] To solve the above technical problems, according to the first aspect of this application, with reference to Figure 1 and Figure 3 This disclosure provides a touch structure 100, which includes a first touch electrode layer 110 and a second touch electrode layer 120, wherein the second touch electrode layer 120 and the first touch electrode layer 110 are stacked together along a third direction Z; wherein the third direction Z is also the thickness direction of the touch structure 100.
[0025] The first touch electrode layer 110 includes a plurality of first sub-electrodes 111 arranged along a first direction Y and a plurality of second sub-electrodes 112 arranged along a second direction X, wherein the first direction Y and the second direction X are perpendicular to each other, such that the first sub-electrodes 111 and the second sub-electrodes 112 form an orthogonal row and column structure. The second touch electrode layer 120 includes a plurality of third sub-electrodes 121.
[0026] The first sub-electrode 111 is insulated from the second sub-electrode 112, and the first sub-electrode 111 is also insulated from the third sub-electrode 121. Because the first sub-electrode 111 is insulated from the second sub-electrode 112, and also from the third sub-electrode 121, interference between the different electrodes is avoided, ensuring the accuracy of signal transmission. The third sub-electrode 121 is electrically connected to the second sub-electrode 112. On a projection plane perpendicular to the third direction Z, the projection of the third sub-electrode 121 at least partially overlaps with the projection of the first sub-electrode 111, meaning the third sub-electrode 121 and the first sub-electrode 111 are positioned directly opposite each other.
[0027] Understandable, refer to Figure 2Lateral electric field lines are generated between the first sub-electrode 111 and the second sub-electrode 112 to form a first mutual capacitance signal. Electric field lines with opposing areas can be generated between the first sub-electrode 111 and the third sub-electrode 121 to form a second mutual capacitance signal, thereby enhancing the amount of mutual capacitance signal. Furthermore, under this structural design, when the user performs a touch operation, the coupling between the first sub-electrode 111 and the second sub-electrode 112 and the third sub-electrode 121 near the touch point can be affected simultaneously, thereby changing the magnitude of the first mutual capacitance signal and the second mutual capacitance signal, thus increasing the amount and rate of change of capacitance during touch.
[0028] By adopting the above technical solution, and by adding a third sub-electrode 121 to generate lateral electric field lines based on the first sub-electrode 111 and the second sub-electrode 112, the electric field lines with opposite areas can be generated between the third sub-electrode 121 and the first sub-electrode 111. This significantly increases the amount of mutual capacitance signal that the touch structure 100 can generate, as well as the amount and rate of capacitance change during touch, thereby improving touch sensitivity and reliability. This enables more precise and efficient touch operation and enhances the smoothness of the user interaction experience.
[0029] Furthermore, this touch structure 100 exhibits good adaptability in various application scenarios. For example, in the touch display panel 10, the polarizer, optical adhesive, and cover plate on the outer side of the touch structure 100 can be made of materials with lower dielectric constants to improve issues such as parasitic capacitance and signal interference. Based on this, combined with the aforementioned touch structure 100, the weakening of electric field line intensity caused by materials with lower dielectric constants can be compensated, thereby ensuring touch sensitivity.
[0030] For example, when touching with gloves or using a stylus, the touch structure 100 can accurately detect touch actions under gloves and accurately identify the position and movement of the stylus by increasing the amount of mutual capacitance signal and the amount of capacitance change during touch.
[0031] In some embodiments of this application, reference is made to Figure 3 Multiple first sub-electrodes 111 are continuously connected along the first direction Y, and multiple second sub-electrodes 112 are insulated and isolated along the second direction X.
[0032] It can be understood that multiple first sub-electrodes 111 are arranged in multiple columns, and the first sub-electrodes 111 in the same column are electrically connected in sequence, while the first sub-electrodes 111 in different columns are insulated from each other; multiple second sub-electrodes 112 are arranged in multiple rows, and the second sub-electrodes 112 in the same row are insulated from each other, while the second sub-electrodes 112 in different rows are insulated from each other.
[0033] In some embodiments of this application, reference is made to Figure 1The touch structure 100 further includes a first insulating layer 130. The first insulating layer 130 is disposed between the first touch electrode layer 110 and the second touch electrode layer 120 to at least achieve insulation isolation between the first touch electrode layer 110 and the second touch electrode layer 120, ensuring the stability and reliability of the touch structure 100. The first insulating layer 130 has a third through-hole 133 extending through the third direction Z.
[0034] Reference Figure 5 The second touch electrode layer 120 further includes a bridging sub-electrode 123. The bridging sub-electrode 123 is electrically connected to two adjacent second sub-electrodes 112 along the second direction X through a third via 133, thereby establishing a signal transmission path for multiple second sub-electrodes 112 along the second direction X.
[0035] It is understandable that the bridging sub-electrode 123 and the third sub-electrode 121 are insulated from each other.
[0036] By adopting the above solution, by setting the bridging sub-electrode 123 and the third sub-electrode 121 in the same driving electrode layer (i.e., the second touch electrode layer 120), the bridging sub-electrode 123 can be used to realize the electrical connection between different second sub-electrodes 112, ensuring smooth signal transmission, and avoiding the problem of increasing the thickness of the touch structure 100 due to the addition of an extra layer structure. At the same time, since the bridging sub-electrode 123 and the third sub-electrode 121 are in the same layer, they can also be formed using the same process in manufacturing, reducing production costs.
[0037] In some embodiments of this application, reference is made to Figure 3 and Figure 5 The first touch electrode layer 110 further includes a conductive portion 113. The conductive portion 113 is connected between two adjacent first sub-electrodes 111 along the first direction Y; on the projection plane perpendicular to the third direction Z, the projection of the bridging sub-electrode 123 at least partially overlaps with the projection of the conductive portion 113.
[0038] It is understood that the bridging sub-electrode 123 and the conductive part 113 are arranged facing each other in the thickness direction of the touch structure 100.
[0039] By adopting the above scheme, the position of the bridging sub-electrode 123 and the conductive part 113 is limited, which can reduce the interference of the electric field lines of the opposing area generated between the first sub-electrode 111 and the third sub-electrode 121 by the arrangement of the bridging sub-electrode 123 and the conductive part 113, and maintain the effect of enhancing the mutual capacitance signal.
[0040] In some embodiments of this application, reference is made to Figure 1The second sub-electrode 112 includes a second body M2 and a second connecting portion 112c. The second connecting portion 112c is located at the edge of the second body M2 and is electrically connected to the third sub-electrode 121.
[0041] It can be understood that the second main body M2 is configured to generate a first mutual capacitance signal with the first sub-electrode 111, while the second connecting portion 112c is configured to be electrically connected to the third sub-electrode 121. On the projection plane perpendicular to the third direction Z, the projection of the second connecting portion 112c is located outside the projection of the second main body M2.
[0042] By adopting the above solution, and by placing the second connecting portion 112c at the edge of the second main body M2 and electrically connecting it to the third sub-electrode 121, the signal transmission path between the second sub-electrode 112 and the third sub-electrode 121 can be optimized, reducing interference during signal transmission and improving the sensitivity and response speed of the touch structure 100. Simultaneously, since the second connecting portion 112c is located at the edge of the second main body M2, it facilitates connection with the third sub-electrode 121, reducing manufacturing difficulty and cost.
[0043] In other embodiments of this application, reference is made to Figure 1 The third sub-electrode 121 includes a third body M3 and a third connecting part 121c. The third connecting part 121c is located at the edge of the third body M3 and is electrically connected to the second sub-electrode 112.
[0044] It can be understood that the third main body M3 is configured to generate a second mutual capacitance signal with the first sub-electrode 111, while the third connecting part 121c is configured to be electrically connected to the second sub-electrode 112. On the projection plane perpendicular to the third direction Z, the projection of the third connecting part 121c is located outside the projection of the third main body M3.
[0045] By adopting the above solution, and by placing the third connecting part 121c at the edge of the third main body M3 and electrically connecting it to the second sub-electrode 112, the signal transmission path between the second sub-electrode 112 and the third sub-electrode 121 can be optimized, reducing interference during signal transmission and improving the sensitivity and response speed of the touch structure 100. Simultaneously, since the third connecting part 121c is located at the edge of the third main body M3, it facilitates connection with the second sub-electrode 112, reducing manufacturing difficulty and cost.
[0046] In other embodiments of this application, reference is made to Figure 1The second sub-electrode 112 includes a second main body M2 and a second connecting portion 112c, the second connecting portion 112c being located at the edge of the second main body M2; the third sub-electrode 121 includes a third main body M3 and a third connecting portion 121c, the third connecting portion 121c being located at the edge of the third main body M3; the second connecting portion 112c and the third connecting portion 121c are electrically connected.
[0047] This method of setting the second connecting part 112c at the edge of the second main body M2 and the third connecting part 121c at the edge of the third main body M3 and making them electrically connected can reduce interference during signal transmission. At the same time, this layout can better adapt to the overall design of the touch structure 100, make more reasonable use of the space between each sub-electrode, and further improve the overall performance and reliability of the touch structure 100. It should be noted that the arrangement and quantity of the second connecting part 112c and the third connecting part 121c are not specifically limited and can be adapted according to connection requirements. For example, the second connecting part 112c can be provided only on the second sub-electrode 112, while the third sub-electrode 121 may not have the third connecting part 121c; or the third connecting part 121c can be provided only on the third sub-electrode 121, while the second sub-electrode 112 may not have the second connecting part 112c; or, the second connecting part 112c can be provided on the second sub-electrode 112, while the third connecting part 121c connected to the second connecting part 112c can be provided on the third sub-electrode 121.
[0048] In some embodiments of this application, reference is made to Figure 1 The first insulating layer 130 has a first through-hole 131. The first through-hole 131 is disposed through the third direction Z; the third sub-electrode 121 is electrically connected to the second sub-electrode 112 through the first through-hole 131.
[0049] Specifically, on the projection plane perpendicular to the third direction Z, the projection of at least one first via 131 at least partially coincides with the projection of the second connecting portion 112c; or, on the projection plane perpendicular to the third direction Z, the projection of at least one first via 131 at least partially coincides with the projection of the third connecting portion 121c; or, while the projection of at least one first via 131 at least partially coincides with the projection of the second connecting portion 112c, the projection of the same first via 131 at least partially coincides with the projection of the third connecting portion 121c, that is, the first via 131 is located between the second connecting portion 112c and the third connecting portion 121c.
[0050] It should be noted that the number and location of the first through holes 131 can be selected based on the arrangement of at least one of the second connecting part 112c and the third connecting part 121c.
[0051] In some embodiments of this application, reference is made to Figure 3 and Figure 7 The second main body M2 includes: a second main body 112a and at least two second branches 112b. The second main body 112a extends along a second direction X; at least two second branches 112b are disposed on both sides of the second main body 112a along a first direction Y; at least one second connecting part 112c is connected to the edge of the second branch 112b.
[0052] By adopting the above scheme, the arrangement of the second main stem 112a extending along the second direction X facilitates the conduction of current in the second direction X. In addition, the arrangement of the second branch 112b increases the adjacent interface coupling area between the second sub-electrode 112 and the first sub-electrode 111, improves the coupling effect between the first sub-electrode 111 and the second sub-electrode 112, effectively improves the mutual capacitance value of the first mutual capacitance signal between the first sub-electrode 111 and the second sub-electrode 112, and improves the amount of capacitance signal change when the user performs touch operation, thereby effectively improving touch sensitivity.
[0053] Furthermore, by connecting the second connecting portion 112c to the edge of the second branch portion 112b, the electrical connection between the second sub-electrode 112 and the third sub-electrode 121 is achieved, while simultaneously increasing the adjacent interface coupling area between the second sub-electrode 112 and the first sub-electrode 111, thereby effectively improving touch sensitivity. Moreover, the provision of the second connecting portion 112c, while achieving electrical connection between the second sub-electrode 112 and the third sub-electrode 121, reduces the facing area of the second sub-electrode 112 and the third sub-electrode 121.
[0054] In one example of this application, reference is made to Figure 3 At least two second branches 112b are symmetrically arranged on both sides of the second main body 112a along the first direction Y, so that the mutual capacitance electric field of the first mutual capacitance signal in the entire touch structure 100 is more uniformly distributed.
[0055] In one example of this application, reference is made to Figure 7 Multiple second connecting portions 112c are continuously spaced at the edge of the second branch portion 112b to form a toothed structure, thereby further increasing the adjacent boundary coupling area between the second sub-electrode 112 and the first sub-electrode 111.
[0056] In some embodiments of this application, reference is made to Figure 3 and Figure 6The first sub-electrode 111 includes a first body M1; the first body M1 includes a first main stem 111a and at least two first branches 111b. The first main stem 111a extends along a first direction Y, which is beneficial for the conduction of current in the first direction Y; the at least two first branches 111b are respectively disposed on both sides of the first main stem 111a along a second direction X.
[0057] It is understood that the first main stem 111a and the first branch 111b are surrounded by the second sub-electrode 112, and correspondingly, the second main stem 112a and the second branch 112b are surrounded by the first sub-electrode 111, thereby increasing the adjacent boundary coupling area between the second sub-electrode 112 and the first sub-electrode 111.
[0058] It should be noted that the shapes of the first branch 111b and the second branch 112b can be selected according to the design requirements of the sub-electrode, and the embodiments of this application do not impose specific limitations.
[0059] In some embodiments of this application, reference is made to Figure 4 and Figure 8 The third main body M3 includes a third main body 121a and a third branch 121b. The third main body 121a extends along a first direction Y; the third branch 121b is located on both sides of the third main body 121a along a second direction X; at least one third connecting part 121c is connected to the edge of the third branch 121b.
[0060] It is understandable that the shape of the third main body M3 is similar to the structure of the first main body M1; that is, the third main body 121a and the first main body 111a are arranged facing each other along the third direction Z, and the third branch 121b and the first branch 111b are arranged facing each other along the third direction Z.
[0061] By adopting the above scheme, the coupling area between the third sub-electrode 121 and the first sub-electrode 111 can be increased by setting the third main branch 121a and the third branch 121b, thereby improving the coupling effect between the first sub-electrode 111 and the second sub-electrode 112, effectively improving the mutual capacitance value of the second mutual capacitance signal between the first sub-electrode 111 and the third sub-electrode 121, and increasing the amount of capacitance signal change when the user performs touch operation, thereby effectively improving touch sensitivity.
[0062] Furthermore, by connecting the third connecting portion 121c to the edge of the third branch portion 121b, the electrical connection between the third sub-electrode 121 and the second sub-electrode 112 is achieved, while the coupling area between the third sub-electrode 121 and the first sub-electrode 111 is further increased, thereby effectively improving touch sensitivity. Moreover, the arrangement of the third connecting portion 121c, while achieving electrical connection between the second sub-electrode 112 and the third sub-electrode 121, can reduce the facing area between the second sub-electrode 112 and the third sub-electrode 121.
[0063] In one example of this application, reference is made to Figure 8 Multiple third connecting portions 121c are continuously spaced at the edge of the third branch portion 121b to form a toothed structure, thereby further increasing the coupling area between the third sub-electrode 121 and the first sub-electrode 111.
[0064] In some embodiments of this application, one of the first sub-electrode 111 and the second sub-electrode 112 is configured to load a driving signal, and the other of the first sub-electrode 111 and the second sub-electrode 112 is configured to load a sensing signal. One of the first sub-electrode 111 and the third sub-electrode 121 is configured to load a driving signal, and the other of the first sub-electrode 111 and the third sub-electrode 121 is configured to load a sensing signal. This signal loading configuration enables the touch structure 100 to sense the user's touch operation.
[0065] In one example of this application, the first sub-electrode 111 is configured to load a driving signal, the second sub-electrode 112 is configured to load a sensing signal, and the third sub-electrode 121 is configured to load a sensing signal; see reference. Figure 2 Lateral electric field lines are generated between the first sub-electrode 111 and the second sub-electrode 112, and electric field lines with opposite areas can be generated between the first sub-electrode 111 and the third sub-electrode 121.
[0066] In one example of this application, the first touch electrode layer 110 may be located on the side of the second touch electrode layer 120 away from the display layer 210 of the touch display panel 10; or, the first touch electrode layer 110 may be located on the side of the second touch electrode layer 120 close to the display layer 210 of the touch display panel 10. This application embodiment does not limit this, and the choice can be made according to the design requirements of the touch structure 100.
[0067] In some embodiments of this application, reference is made to Figure 4 and Figure 6The second touch electrode layer 120 further includes a plurality of fourth sub-electrodes 122. The fourth sub-electrodes 122 are insulated from and isolated from the third sub-electrodes 121, and are also insulated from and isolated from the second sub-electrodes 112, thus avoiding interference and short circuits between different electrodes; the plurality of third sub-electrodes 121 are arranged along the first direction Y, and the plurality of fourth sub-electrodes 122 are arranged along the second direction X; the fourth sub-electrodes 122 are electrically connected to the first sub-electrodes 111; on the projection plane perpendicular to the third direction Z, the projection of the fourth sub-electrodes 122 and the projection of the second sub-electrodes 112 at least partially overlap, that is, the fourth sub-electrodes 122 and the second sub-electrodes 112 are arranged facing each other.
[0068] It is understood that a lateral electric field line is generated between the fourth sub-electrode 122 and the third sub-electrode 121 to form a third mutual capacitance signal, and an electric field line with a direct area between the fourth sub-electrode 122 and the second sub-electrode 112 to form a fourth mutual capacitance signal, thereby enhancing the amount of mutual capacitance signal. Furthermore, under such a structural design, when the user performs a touch operation, it can simultaneously affect the coupling between the first sub-electrode 111 and the second sub-electrode 112 and the third sub-electrode 121 near the touch point, as well as the coupling between the fourth sub-electrode 122 and the second sub-electrode 112 and the third sub-electrode 121, thereby changing the magnitude of the first mutual capacitance signal, the second mutual capacitance signal, the third mutual capacitance signal, and the fourth mutual capacitance signal, thereby further increasing the amount and rate of change of capacitance during touch.
[0069] In one example of this application, the first sub-electrode 111 is configured as a load driving signal, the second sub-electrode 112 is configured as a load sensing signal, the third sub-electrode 121 is configured as a load sensing signal, and the fourth sub-electrode 122 is configured as a load driving signal.
[0070] In one example of this application, reference is made to Figure 4 Multiple third sub-electrodes 121 are arranged in multiple columns, with the third sub-electrodes 121 in the same column having an insulating gap, and the third sub-electrodes 121 in different columns having an insulating gap; multiple fourth sub-electrodes 122 are arranged in multiple rows, with the fourth sub-electrodes 122 in the same row having an insulating gap, and the fourth sub-electrodes 122 in different rows having an insulating gap; by adopting the above insulation settings, short circuits in the circuit can be avoided.
[0071] In one example of this application, reference is made to Figure 1 , Figure 5 and Figure 6 The first insulating layer 130 not only insulates the first touch electrode layer 110 and the second touch electrode layer 120, but also covers the second touch electrode layer 120, thereby achieving insulation between the third sub-electrode 121, the fourth sub-electrode 122 and the bridging sub-electrode 123.
[0072] In some embodiments of this application, reference is made to Figure 6The fourth sub-electrode 122 includes a fourth main body M4 and a fourth connecting part 122c. The fourth connecting part 122c is located at the edge of the fourth main body M4 and is electrically connected to the first sub-electrode 111.
[0073] It can be understood that the fourth main body M4 is configured to generate a third mutual capacitance signal with the third sub-electrode 121, and the fourth main body M4 is configured to generate a fourth mutual capacitance signal with the second sub-electrode 112, while the fourth connecting part 122c is configured to be electrically connected to the first sub-electrode 111. On the projection plane perpendicular to the third direction Z, the projection of the fourth connecting part 122c is located outside the projection of the fourth main body M4.
[0074] By adopting the above solution, and by placing the fourth connecting part 122c at the edge of the fourth main body M4 and electrically connecting it to the first sub-electrode 111, the signal transmission path between the fourth sub-electrode 122 and the first sub-electrode 111 can be optimized, reducing interference during signal transmission and improving the sensitivity and response speed of the touch structure 100. Simultaneously, since the fourth connecting part 122c is located at the edge of the fourth main body M4, it facilitates connection with the first sub-electrode 111, reducing manufacturing difficulty and cost.
[0075] In other embodiments of this application, reference is made to Figure 6 The first sub-electrode 111 also includes a first connecting portion 111c, which is located at the edge of the first body M1 and is electrically connected to the fourth sub-electrode 122.
[0076] It can be understood that, on the projection plane perpendicular to the third direction Z, the projection of the second connecting part 112c is located outside the projection of the second main body M2. Since the second connecting part 112c is located at the edge of the second main body M2, it is convenient to connect with the third sub-electrode 121, reducing manufacturing difficulty and cost.
[0077] In other embodiments of this application, reference is made to Figure 6 The first sub-electrode 111 further includes a first connecting portion 111c, which is located at the edge of the first main body M1; the fourth sub-electrode 122 includes a fourth main body M4 and a fourth connecting portion 122c, which is located at the edge of the fourth main body M4; the first connecting portion 111c and the fourth connecting portion 122c are electrically connected.
[0078] This method of setting the first connecting part 111c at the edge of the first main body M1 and the fourth connecting part 122c at the edge of the fourth main body M4 and making them electrically connected can reduce interference during signal transmission. At the same time, this layout can better adapt to the overall design of the touch structure 100, make more reasonable use of the space between each sub-electrode, and further improve the overall performance and reliability of the touch structure 100. It should be noted that the arrangement and quantity of the first connecting part 111c and the fourth connecting part 122c are not specifically limited and can be adapted according to connection requirements. For example, the first connecting part 111c can be provided only on the first sub-electrode 111, while the fourth connecting part 122c is not provided on the fourth sub-electrode 122; or the fourth connecting part 122c can be provided only on the fourth sub-electrode 122, while the first connecting part 111c is not provided on the first sub-electrode 111; or, the first connecting part 111c can be provided on the first sub-electrode 111, while the fourth connecting part 122c connected to the first connecting part 111c can be provided on the fourth sub-electrode 122.
[0079] In some embodiments of this application, reference is made to Figure 6 The first insulating layer 130 has a second via 132. The second via 132 is disposed through the third direction Z; the fourth sub-electrode 122 is electrically connected to the first sub-electrode 111 through the second via 132.
[0080] Specifically, on the projection plane perpendicular to the third direction Z, the projection of at least one second via 132 at least partially coincides with the projection of the first connecting portion 111c; or, on the projection plane perpendicular to the third direction Z, the projection of at least one second via 132 at least partially coincides with the projection of the fourth connecting portion 122c; or, while the projection of at least one first via 131 at least partially coincides with the projection of the first connecting portion 111c, the projection of the same first via 131 at least partially coincides with the projection of the fourth connecting portion 122c, that is, the first via 131 is located between the first connecting portion 111c and the fourth connecting portion 122c.
[0081] It should be noted that the number and position of the second vias 132 can be selected based on the arrangement of at least one of the first connecting portion 111c and the fourth connecting portion 122c.
[0082] In some embodiments of this application, reference is made to Figure 9 At least one first connecting portion 111c is connected to the edge of the first branch portion 111b.
[0083] By adopting the above solution, by connecting the first connecting portion 111c to the edge of the first branch portion 111b, the electrical connection between the first sub-electrode 111 and the fourth sub-electrode 122 is achieved, while the adjacent interface coupling area between the first sub-electrode 111 and the second sub-electrode 112 is further increased, thereby effectively improving touch sensitivity. Furthermore, the arrangement of the first connecting portion 111c, while achieving electrical connection between the first sub-electrode 111 and the fourth sub-electrode 122, can reduce the facing area between the first sub-electrode 111 and the fourth sub-electrode 122.
[0084] In one example of this application, reference is made to Figure 9 Multiple first connecting portions 111c are continuously spaced at the edge of the first branch portion 111b to form a toothed structure, thereby further increasing the adjacent boundary coupling area between the first sub-electrode 111 and the second sub-electrode 112.
[0085] In some embodiments of this application, reference is made to Figure 6 and Figure 10 The fourth main body M4 includes a fourth main stem 122a and a fourth branch 122b. The fourth main stem 122a extends along the second direction X; the fourth branch 122b is located on both sides of the fourth main stem 122a along the first direction Y; at least one fourth connecting part 122c is connected to the edge of the fourth branch 122b.
[0086] Understandable, refer to Figure 3 and Figure 4 The shape of the fourth main body M4 is similar to the structure of the second main body M2; that is, the fourth main body 122a and the second main body 112a are arranged facing each other along the third direction Z, and the fourth branch 122b and the second branch 112b are arranged facing each other along the third direction Z. The fourth main body 122a and the fourth branch 122b are surrounded by the third sub-electrode 121, and correspondingly, the third main body 121a and the third branch 121b are surrounded by the fourth sub-electrode 122, thereby increasing the adjacent boundary coupling area between the fourth sub-electrode 122 and the third sub-electrode 121.
[0087] By adopting the above scheme, the coupling area between the fourth sub-electrode 122 and the second sub-electrode 112 can be increased by setting the fourth main branch 122a and the fourth branch 122b, thereby improving the coupling effect between the fourth sub-electrode 122 and the second sub-electrode 112, and the coupling area between the fourth sub-electrode 122 and the third sub-electrode 121 can be increased, thereby improving the coupling effect between the fourth sub-electrode 122 and the third sub-electrode 121, thus effectively improving the touch sensitivity.
[0088] Furthermore, by connecting the fourth connecting portion 122c to the edge of the fourth branch portion 122b, the electrical connection between the fourth sub-electrode 122 and the first sub-electrode 111 is achieved, while the coupling area between the fourth sub-electrode 122 and the third sub-electrode 121 is further increased, thereby effectively improving touch sensitivity. Moreover, the arrangement of the fourth connecting portion 122c, while achieving electrical connection between the fourth sub-electrode 122 and the first sub-electrode 111, can reduce the facing area between the fourth sub-electrode 122 and the first sub-electrode 111.
[0089] In one example of this application, reference is made to Figure 10 Multiple fourth connecting portions 122c are continuously spaced at the edge of the fourth branch portion 122b to form a toothed structure, thereby further increasing the coupling area between the fourth sub-electrode 122 and the third sub-electrode 121.
[0090] In some embodiments of this application, reference is made to Figure 1 The touch structure 100 further includes a substrate 150. A third sub-electrode 121 and a fourth sub-electrode 122 are disposed on the substrate 150, and the substrate 150 provides reliable support for the third sub-electrode 121 and the fourth sub-electrode 122. A first insulating layer 130 covers the third sub-electrode 121 and the fourth sub-electrode 122 while being supported on the substrate 150.
[0091] In some embodiments of this application, reference is made to Figure 1 The touch structure 100 further includes a second insulating layer 140. The second insulating layer 140 covers the first sub-electrode 111 and the second sub-electrode 112 of the first touch electrode layer 110 to at least achieve insulation between the first sub-electrode 111 and the second sub-electrode 112.
[0092] In some embodiments of this application, reference is made to Figure 11 The first touch electrode layer 110 includes a first mesh channel line 110a. The first sub-electrode 111 is configured to be formed by a portion of the first mesh channel line 110a, and the second sub-electrode 112 is configured to be formed by another portion of the first mesh channel line 110a. The first mesh channel line 110a forming the first sub-electrode 111 is disconnected from the other portion of the first mesh channel line 110a forming the second sub-electrode 112.
[0093] In some embodiments of this application, reference is made to Figure 11 The second touch electrode layer 120 includes a second mesh channel line 110b, the third sub-electrode 121 is configured to be formed by a portion of the second mesh channel line 110b, and the fourth sub-electrode 122 is configured to be formed by another portion of the second mesh channel line 110b, and the portion of the second mesh channel line 110b constituting the third sub-electrode 121 is disconnected from the other portion of the second mesh channel line 110b constituting the fourth sub-electrode 122.
[0094] In some embodiments of this application, the bridging sub-electrode 123 is also configured to be a portion of the second mesh channel line 110b, and the bridging sub-electrode 123 is disconnected from the third sub-electrode 121 and the fourth sub-electrode 122, respectively.
[0095] In some embodiments of this application, the mesh channel lines avoid the sub-pixels in the display layer 210 of the touch display panel 10, that is, the mesh channel lines should be laid between the sub-pixels.
[0096] According to the second aspect of this disclosure, referring to Figure 12A touch display panel 10 is provided. The touch display panel 10 includes a display layer 210, an encapsulation layer 220, and a touch layer 230. The encapsulation layer 220 is disposed on the display layer 210; the touch layer 230 is disposed on the encapsulation layer 220, and the touch layer 230 includes the touch structure 100 as described above.
[0097] This embodiment provides a touch display panel 10, which includes the touch structure 100 provided in this application embodiment. Based on the provision of a first sub-electrode 111 and a second sub-electrode 112 to generate lateral electric field lines, a third sub-electrode 121 is added, so that electric field lines with opposite areas can be generated between the third sub-electrode 121 and the first sub-electrode 111. This significantly increases the amount of mutual capacitance signal that the touch structure 100 can generate, as well as the amount and rate of capacitance change during touch, thereby improving touch sensitivity and reliability. It can achieve more accurate and efficient touch operation and improve the smoothness of user interaction experience.
[0098] In one example of this application, the touch display panel 10 may be a flexible AMOLED On-cell display panel.
[0099] In some embodiments of this application, reference is made to Figures 1 to 3 The touch display panel 10 also includes a functional layer 240. The functional layer 240 is disposed on the touch layer 230.
[0100] Specifically, the functional layer 240 includes at least one of a polarizer, a cover plate, and an optical adhesive.
[0101] Based on the above structural design of the touch structure 100, the functional layer 240 (such as polarizer, optical adhesive, and cover plate) can use materials with lower dielectric constants to improve parasitic capacitance, signal interference, and other issues. Thus, the touch structure 100 can compensate for the weakening of electric field line strength caused by materials with lower dielectric constants and ensure the touch sensitivity of the touch display panel 10.
[0102] According to a third aspect of this disclosure, a display device is provided, the display device including the touch display panel 10 described above.
[0103] Specifically, the display device in this application embodiment can be applied to devices such as mobile phones, tablets, and computers. Based on the high-sensitivity touch sensing effect of the touch structure 100, it can realize glove operation and stylus control.
[0104] In some embodiments of this application, the display device of this application can control the automatic screen-off of the display device based on the change in capacitance signal near the earpiece. The specific control method includes the following steps: The device acquires the capacitance signal change in a preset area near the earpiece of the display device, and controls the display device to perform a screen-off operation when the capacitance signal change in the preset area exceeds a change threshold.
[0105] It is understood that when the change in capacitance signal within the preset area exceeds a threshold, a large area of skin may be close to the preset area near the earpiece. In this embodiment, the display device, combined with the above control method, can eliminate the need for sensing devices such as infrared sensors, achieving automatic screen-off when the device is brought close to the earpiece.
[0106] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0107] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0108] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0109] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A touch structure, characterized in that, include: The first touch electrode layer includes a plurality of first sub-electrodes arranged along a first direction and a plurality of second sub-electrodes arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other. The second touch electrode layer is stacked with the first touch electrode layer along a third direction, and the second touch electrode layer includes a plurality of third sub-electrodes; Wherein, the first sub-electrode is insulated from the second sub-electrode, the first sub-electrode is insulated from the third sub-electrode, and the third sub-electrode is electrically connected to the second sub-electrode; On a projection plane perpendicular to the third direction, the projection of the third sub-electrode at least partially overlaps with the projection of the first sub-electrode.
2. The touch structure according to claim 1, characterized in that, The second sub-electrode includes a second body and a second connecting portion, the second connecting portion being located at the edge of the second body, and the second connecting portion being electrically connected to the third sub-electrode; Alternatively, the third sub-electrode includes a third body and a third connecting portion, the third connecting portion being located at the edge of the third body and electrically connected to the second sub-electrode; Alternatively, the second sub-electrode includes a second body and a second connecting portion, the second connecting portion being located at the edge of the second body, and the third sub-electrode includes a third body and a third connecting portion, the third connecting portion being located at the edge of the third body; the second connecting portion and the third connecting portion are electrically connected.
3. The touch structure according to claim 2, characterized in that, The second subject includes: The second main branch extends along the second direction; At least two second branches are located on either side of the second main trunk along the first direction; At least one of the second connecting portions is connected to the edge of the second branch portion; And / or, the third subject includes: The third main branch extends along the first direction; The third branch is located on both sides of the third main trunk along the second direction; At least one of the third connecting portions is connected to the edge of the third branch.
4. The touch structure according to claim 1, characterized in that, One of the first sub-electrode and the second sub-electrode is configured to apply a driving signal, and the other of the first sub-electrode and the second sub-electrode is configured to apply a sensing signal; One of the first sub-electrode and the third sub-electrode is configured to load a driving signal, and the other of the first sub-electrode and the third sub-electrode is configured to load a sensing signal.
5. The touch structure according to any one of claims 1 to 4, characterized in that, The second touch electrode layer also includes: Multiple fourth sub-electrodes are insulated from the third sub-electrode; The plurality of third sub-electrodes are arranged along the first direction, and the plurality of fourth sub-electrodes are arranged along the second direction; the fourth sub-electrodes are electrically connected to the first sub-electrodes. On a projection plane perpendicular to the third direction, the projection of the fourth sub-electrode at least partially overlaps with the projection of the second sub-electrode.
6. The touch structure according to any one of claims 1 to 4, characterized in that, The touch structure also includes: A first insulating layer is disposed between the first touch electrode layer and the second touch electrode layer, and the first insulating layer has a third through hole disposed through the third direction; Multiple first sub-electrodes are continuously connected along a first direction, and multiple second sub-electrodes are insulated and isolated along a second direction; The second touch electrode layer also includes: The bridging sub-electrode is electrically connected to two adjacent second sub-electrodes along the second direction via the third via.
7. The touch structure according to claim 6, characterized in that, The first touch electrode layer further includes: The conductive portion is connected between two adjacent first sub-electrodes along the first direction; On the projection plane perpendicular to the third direction, the projection of the bridging sub-electrode at least partially coincides with the projection of the conductive portion.
8. The touch structure according to any one of claims 1 to 4, characterized in that, The first touch electrode layer includes a first mesh channel line, the first sub-electrode is configured to be formed by a portion of the first mesh channel line, the second sub-electrode is configured to be formed by another portion of the first mesh channel line, and the first mesh channel line forming a portion of the first sub-electrode is disconnected from the first mesh channel line forming the other portion of the second sub-electrode. And / or, the second touch electrode layer includes a second mesh channel line, and the third sub-electrode is configured to be formed by at least a portion of the second mesh channel line.
9. A touch display panel, characterized in that, include: Display layer; An encapsulation layer is disposed on the display layer; A touch layer is disposed on the encapsulation layer, the touch layer comprising the touch structure as described in any one of claims 1 to 8.
10. A display device, characterized in that, Includes the touch display panel as described in claim 9.