Touch panels and display devices

Abstract

The present invention discloses a touch panel, comprising a sensing electrode and a flexible circuit board, wherein the sensing electrode comprises a first sensing electrode portion and a second sensing electrode portion that are sequentially staggered and connected along the length direction of the touch panel, and a first angle greater than 0 degrees and less than 180 degrees is provided between adjacent first sensing electrode portions and second sensing electrode portions, the flexible circuit board is located at one end in the length direction of the touch panel, and the sensing electrode is electrically connected to the flexible circuit board via a first end portion facing the flexible circuit board. The present invention also discloses a display device. The conductive lead does not need to pass through the left and right sides of the touch panel, and the corresponding left and right sides of the touch panel do not need to be printed with a black light-shielding layer, which reduces the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design, thereby improving the user experience.

Description

Technical Field

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

[0002] With the advancement of science and technology, touch technology for display screens has also developed rapidly. Touch screens are widely used in electronic devices such as mobile phones, computers, e-books, and tablets, and have become an indispensable part of people's lives. With the emergence of various touch-sensitive display devices, consumers have increasingly higher requirements for the aesthetics and performance of touch screens. Capacitive touch screens are a touch structure widely used in display devices. External capacitive touch screens mainly use a GFF (Glass-Film-Film) structure, that is, a glass cover-thin film electrode-thin film electrode structure. The thin film electrode needs to be bound to a flexible printed circuit (FPC) located at one end of the touch panel to achieve electrical connection with other electronic components of the display device.

[0003] In existing technology, opaque metal leads connect the thin-film electrodes at the edge of the visible area to the flexible circuit board located at the top or bottom of the touch panel. The thin-film electrodes (sensing and driving electrodes) of a double-layer touch screen intersect at right angles, and the metal leads are routed along the two sides of the frame, increasing the size of the frame. To enhance the overall aesthetics of the display device, a black light-shielding layer is printed on the frame of the glass cover corresponding to the metal leads and the flexible circuit board. This reduces the size of the visible area, lowers the screen-to-body ratio of the display device, and significantly degrades the user experience. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a touch panel and a display device to solve the problems in the prior art of wide borders, small visible areas, low screen-to-body ratio and poor user experience of touch panels.

[0005] To solve the above technical problems, the present invention provides a touch panel, comprising sensing electrodes and a flexible circuit board. The sensing electrodes include first and second sensing electrode portions that are sequentially and alternately connected along the length of the touch panel, with a first angle greater than 0 degrees and less than 180 degrees defined between adjacent first and second sensing electrode portions. The flexible circuit board is located at one end of the length of the touch panel, and the sensing electrodes are electrically connected to the flexible circuit board via first ends facing the flexible circuit board. The sensing electrodes include first and second sensing electrode portions that are sequentially and alternately connected along the length of the touch panel, with a first angle greater than 0 degrees and less than 180 degrees defined between adjacent first and second sensing electrode portions. When the first angle between adjacent first and second sensing electrode portions is 0 degrees, the sensing electrodes are equivalent to being arranged in the width direction of the touch panel. In this case, a black light-shielding layer needs to be printed on the left and right sides of the touch panel, increasing the bezel size. When the first angle between adjacent first and second sensing electrode portions is 180 degrees, the sensing electrodes are equivalent to being arranged in the length direction of the touch panel so that the sensing electrodes and the driving electrodes completely overlap. In this case, the capacitive coupling between the sensing electrodes and the driving electrodes reaches full saturation, which is not conducive to touch signal detection. The flexible circuit board is located at one end in the length direction of the touch panel. The sensing electrodes are electrically connected to the flexible circuit board via first ends facing the flexible circuit board. The routing design for the electrical connection between the sensing electrodes and the flexible circuit board does not need to pass through the left and right sides of the touch panel (the ends in the width direction of the touch panel). Accordingly, a black light-shielding layer does not need to be printed on the left and right sides of the touch panel, thereby reducing the bezel size, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow bezel or even a bezel-free design and improving the user experience.

[0006] Furthermore, the first angle between each pair of interconnected first sensing electrode portions and second sensing electrode portions is the same. This ensures a uniform density of the first and second sensing electrode portions. The overlapping portions of the first sensing electrode portions and the driving electrodes and the overlapping portions of the second sensing electrode portions and the driving electrodes are of the same size and evenly distributed. This results in a uniformly distributed capacitance structure and high touch accuracy for the GFF touch panel.

[0007] Furthermore, the touch panel further includes drive electrodes, which are stacked with the sensing electrodes. The drive electrodes include first and second drive electrode portions that are sequentially interlaced along the length of the touch panel, with a second angle greater than 0 degrees and less than 180 degrees between adjacent first and second drive electrode portions. The drive electrodes are electrically connected to the flexible circuit board via second ends facing the flexible circuit board. This is because when the first angle between adjacent first and second drive electrode portions is 0 degrees, the drive electrodes are equivalent to being arranged in the width direction of the touch panel. In this case, a black light-shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle between adjacent first and second drive electrode portions is 180 degrees, the drive electrodes are equivalent to being arranged in the length direction of the touch panel so that the drive electrodes and sensing electrodes completely overlap. In this case, the capacitive coupling between the sensing electrodes and the drive electrodes reaches full saturation, which is not conducive to the detection of touch signals. The driving electrode is electrically connected to the flexible circuit board via the second end portion facing the flexible circuit board. The routing design for the electrical connection between the driving electrode and the flexible circuit board does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0008] Furthermore, the second angle between each pair of interconnected first and second drive electrode segments is the same. This ensures a uniform density of the first and second drive electrode segments, and ensures that the overlapping portions of the first and second drive electrode segments with the sensing electrodes are the same size and evenly distributed. This results in a uniformly distributed capacitance structure and high touch accuracy for the GFF touch panel.

[0009] Furthermore, the first angle and the second angle are the same in size. In this way, the overlapping parts of the sensing electrodes and the driving electrodes are evenly distributed, and the touch effect of each part of the capacitive touch panel is the same, thereby improving the touch accuracy.

[0010] Furthermore, the sensing electrodes and the driving electrodes are symmetrical about the length of the touch panel. This prevents the sensing electrodes and the driving electrodes from completely overlapping, while ensuring sufficient overlap between them. This prevents the sensing electrodes and the driving electrodes from completely overlapping, thereby improving the electrical connection between the sensing electrodes and the conductive leads, and between the driving electrodes and the conductive leads, and preventing short circuits.

[0011] Furthermore, each first sensing electrode portion, when projected vertically onto the touch panel, at least partially overlaps with at least one first driving electrode portion, and each second sensing electrode portion, when projected vertically onto the touch panel, at least partially overlaps with at least one second driving electrode portion. This increases the overlapping area between the sensing electrodes and the driving electrodes, improving the distribution density of the capacitive touch panel and thereby enhancing touch accuracy and performance.

[0012] Furthermore, the touch panel further includes conductive leads, through which the sensing electrodes are electrically connected to the flexible circuit board, and the driving electrodes are electrically connected to the flexible circuit board. This allows for easy control of the routing of the conductive leads, improves conductivity, and reduces the impedance of the touch panel.

[0013] Furthermore, the first sensing electrode unit and the second sensing electrode unit are integrally formed through patterning, and the first driving electrode unit and the second driving electrode unit are integrally formed through patterning. Thus, the process for integrally forming the first sensing electrode unit and the second sensing electrode unit is simple and easy, and the process for integrally forming the first driving electrode unit and the second driving electrode unit is simple and easy. Furthermore, the electrical conductivity between the first sensing electrode unit and the second sensing electrode unit, and between the first driving electrode unit and the second driving electrode unit, is good, reducing the impedance between the sensing electrodes and the driving motor, thereby improving the touch accuracy of the touch panel and enhancing the touch effect.

[0014] The present invention also provides a display device, which includes a display panel, a main board and a touch panel described in any one of the above. The display panel and the touch panel are stacked together, the display panel outputs an image and displays it through a transparent area of ​​the touch panel, and the touch panel is electrically connected to the main board through the flexible circuit board so that the touch signal received by the touch panel is transmitted to the main board.

[0015] The present invention has the following beneficial effects: the sensing electrodes include first and second sensing electrode portions, which are sequentially interlaced along the length of the touch panel. Adjacent first and second sensing electrode portions have a first angle greater than 0 degrees and less than 180 degrees between them. When the first angle between adjacent first and second sensing electrode portions is 0 degrees, the sensing electrodes are equivalent to being arranged along the width of the touch panel. In this case, a black light-shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle between adjacent first and second sensing electrode portions is 180 degrees, the sensing electrodes are equivalent to being arranged along the length of the touch panel, causing the sensing electrodes and driving electrodes to completely overlap. This results in complete saturation of the capacitive coupling between the sensing electrodes and the driving electrodes, hindering touch signal detection. The flexible circuit board is located at one end in the length direction of the touch panel, and the sensing electrode is electrically connected to the flexible circuit board through the first end portion facing the flexible circuit board. The conductive lead does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel), and the corresponding left and right sides of the touch panel do not need to be printed with a black shading layer, which reduces the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other obvious deformation methods can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a structural diagram of a touch panel provided in Embodiment 1 of the present invention.

[0018] Figure 2 This is a partially enlarged schematic diagram of the touch panel provided in the first embodiment of the present invention.

[0019] Figure 3 This is a schematic structural diagram of the sensing electrodes of the touch panel provided in the first embodiment of the present invention.

[0020] Figure 4 This is a schematic structural diagram of the driving electrodes of the touch panel provided in the first embodiment of the present invention.

[0021] Figure 5 This is a structural diagram of a touch panel provided in Embodiment 2 of the present invention.

[0022] Figure 6This is a partially enlarged schematic diagram of a touch panel provided in the second embodiment of the present invention.

[0023] Figure 7 This is a schematic structural diagram of driving electrodes of a touch panel provided in the second embodiment of the present invention. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 、 Figure 2 and Figure 3 The touch panel provided in the first embodiment of the present invention includes sensing electrodes 10 and a flexible circuit board 20. In a preferred embodiment, the touch panel is rectangular in shape and includes a length direction and a width direction that are perpendicular to each other. In this embodiment, the sensing electrodes 10 are conductive films formed of transparent conductive materials. In a preferred embodiment, the sensing electrodes 10 are patterned indium tin oxide (ITO) films. Furthermore, there are multiple sensing electrodes 10, and the sensing electrodes 10 are arranged in an array along the width direction of the touch panel.

[0026] Specific to Figure 3 Each sensing electrode 10 includes a first sensing electrode portion 12 and a second sensing electrode portion 14, which are interlaced along the length of the touch panel. A first angle 52 greater than 0 degrees and less than 180 degrees is defined between adjacent first sensing electrode portions 12 and second sensing electrode portions 14. Specifically, the first sensing electrode portions 12 and second sensing electrode portions 14 are elongated strips of equal size, electrically connected to each other, and inclined relative to each other. In a preferred embodiment, the first angle 52 between the first sensing electrode portions 12 and second sensing electrode portions 14 is an acute angle. Furthermore, the smaller the first angle 52 between the first sensing electrode portions 12 and second sensing electrode portions 14, the denser the distribution of the first sensing electrode portions 12 and second sensing electrode portions 14 on the touch panel, the larger the area covered by the sensing electrodes 10 on the touch panel, that is, the larger the overlap area between the sensing electrodes 10 and the driving electrodes 30, and the higher the touch accuracy of the capacitive touch screen with a corresponding GFF structure.

[0027] The flexible circuit board 20 is located at one end of the length, i.e., the top or bottom of the touch panel. Specifically, the flexible circuit board 20 is flexible and has good electrical conductivity. One end of the flexible circuit board 20 is electrically connected to the touch panel, and the other end is electrically connected to the mainboard or to the display panel, and then to the mainboard through the display panel. When a user touches the touch panel, it receives a touch signal containing touch information and transmits the touch signal as an electrical signal to the mainboard for analysis and processing.

[0028] The sensing electrodes 10 are electrically connected to the flexible circuit board 20 via their first ends 100 facing the flexible circuit board 20. Specifically, the first sensing electrode portions 12 of the sensing electrodes 10 located at the ends facing the flexible circuit board 20 are electrically connected to the flexible circuit board 20. Specifically, the sensing electrodes 10 include an initial first sensing electrode portion 12, which is the first sensing electrode portion 12 located at the ends facing the flexible circuit board 20, i.e., the first sensing electrode portion 12 closest to the flexible circuit board 20. Starting from the initial first sensing electrode portion 12, the second sensing electrode portions 14 are arranged alternately with the first sensing electrode portions 12 along the length of the touch panel. The end of the initial first sensing electrode portion 12 facing the flexible circuit board 20 is electrically connected to the flexible circuit board 20, i.e., the sensing electrodes 10 are electrically connected to the flexible circuit board 20 via one of their longitudinal ends.

[0029] In this embodiment, combined with Figure 4 The number of drive electrodes 30 is multiple, and the drive electrodes 30 are long and strip-shaped, arranged in an array along the width of the touch panel. The drive electrodes 30 are electrically connected to the flexible circuit board 20 via second ends 300 facing the flexible circuit board 20. Furthermore, the drive electrodes 30 are also conductive films formed of transparent conductive materials. In a preferred embodiment, the drive electrodes 30 are also patterned indium tin oxide (ITO) films.

[0030] The sensing electrodes 10 include first sensing electrode sections 12 and second sensing electrode sections 14, which are interlaced along the length of the touch panel. A first angle 52 greater than 0 degrees and less than 180 degrees is defined between adjacent first sensing electrode sections 12 and second sensing electrode sections 14. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 0 degrees, the sensing electrodes 10 are equivalently arranged along the width of the touch panel. In this case, a black light-shielding layer needs to be printed on both sides of the touch panel, increasing the size of the bezel. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 180 degrees, the sensing electrodes 10 are equivalently arranged along the length of the touch panel, causing the sensing electrodes 10 and driving electrodes 30 to completely overlap. This fully saturates the capacitive coupling between the sensing electrodes 10 and driving electrodes 30, hindering touch signal detection. The flexible circuit board 20 is located at one end in the length direction of the touch panel. The sensing electrode 10 is electrically connected to the flexible circuit board 20 through the first end portion 100 facing the flexible circuit board 20. The conductive lead 40 does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0031] In this embodiment, the first angles 52 between each pair of interconnected first sensing electrode portions 12 and second sensing electrode portions 14 are the same. Furthermore, the first sensing electrode portions 12 and second sensing electrode portions 14 are arranged at a uniform density. The overlapping portions of the first sensing electrode portions 12 and driving electrodes 30 and the overlapping portions of the second sensing electrode portions 14 and driving electrodes 30 are the same size and evenly distributed. This results in a uniformly distributed capacitance structure, and the GFF touch panel exhibits high touch accuracy.

[0032] In this embodiment, the first sensing electrode portion 12 and the second sensing electrode portion 14 are integrally formed through patterning. That is, the sensing electrode 10 is patterned to simultaneously form the first sensing electrode portion 12 and the second sensing electrode portion 14. Specifically, the first sensing electrode portion 12 and the second sensing electrode portion 14 are patterned indium tin oxide (ITO) thin films, and the patterning method can be laser etching or chemical etching. The integral forming process of the first sensing electrode portion 12 and the second sensing electrode portion 14 is simple and easy to implement, and the electrical conductivity between the first sensing electrode portion 12 and the second sensing electrode portion 14 is good, which reduces the impedance of the sensing electrode 10, thereby improving the touch accuracy of the touch panel and enhancing the touch effect.

[0033] In this embodiment, the touch panel also includes a conductive lead 40, and the sensing electrode 10 is electrically connected to the flexible circuit board 20 through the conductive lead 40. Furthermore, the conductive lead 40 is an opaque metal lead. In a preferred embodiment, the conductive lead 40 is a silver glue wire, that is, a silver wire formed by chemically etching or laser etching a silver glue layer. The silver glue wire has good conductivity, reduces the overall impedance of the touch panel, and improves the touch effect. Furthermore, the flexible circuit board 20 is provided with a plurality of binding points, and the silver glue wire is electrically connected to the binding point, so that the sensing electrode 10 or the driving electrode 30 is electrically connected to the flexible circuit board 20. In a preferred embodiment, the binding point is a metal sheet protruding from the flexible circuit board 20, which has good conductive properties. The combination of the silver glue wire and the binding point has a good conductive effect and is easy to bind.

[0034] In this embodiment, the touch panel also includes a cover plate. The cover plate, sensing electrodes 10, and driving electrodes 30 are stacked together. A light-shielding layer is printed on the edge of the cover plate to shield the conductive leads 40 and flexible circuit board 20. Specifically, the cover plate is made of a transparent material such as glass or plastic. It protects the touch panel and display panel while also allowing the user's finger to perform touch operations. The light-shielding layer at the edge of the cover plate shields the top or bottom of the touch panel, correspondingly shielding the opaque conductive leads 40 and flexible circuit board 20, enhancing the appearance of the display device.

[0035] Two sensing electrode sections 14 are provided with a first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14, which is greater than 0 degrees but less than 180 degrees. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 0 degrees, the sensing electrodes 10 are equivalently arranged in the width direction of the touch panel. In this case, a black light shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 180 degrees, the sensing electrodes 10 are equivalently arranged in the length direction of the touch panel, causing the sensing electrodes 10 and the driving electrodes 30 to completely overlap. In this case, the capacitive coupling between the sensing electrodes 10 and the driving electrodes 30 reaches full saturation, which is not conducive to the detection of touch signals. The flexible circuit board 20 is located at one end in the length direction of the touch panel. The sensing electrode 10 is electrically connected to the flexible circuit board 20 through the first end portion 100 facing the flexible circuit board 20. The conductive lead 40 does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0036] See also Figure 5 、 Figure 6 and Figure 7The difference between the touch panel provided in the second embodiment of the present invention and the touch panel provided in the first embodiment is that the touch panel further includes a driving electrode 30, which is stacked with the sensing electrode 10, and the driving electrode 30 and the sensing electrode 10 form a capacitive structure, that is, a touch panel with a GFF structure. Figure 7 The drive electrode 30 includes a first drive electrode portion 32 and a second drive electrode portion 34 that are sequentially staggered along the length of the touch panel, and a second angle 54 greater than 0 degrees and less than 180 degrees is provided between adjacent first drive electrode portions 32 and second drive electrode portions 34. Specifically, the first drive electrode portion 32 and the second drive electrode portion 34 are long strips of the same size, and the first drive electrode portion 32 and the second drive electrode portion 34 are electrically connected to each other and inclined to each other. In a preferred embodiment, the second angle 54 between the first drive electrode portion 32 and the second drive electrode portion 34 is an acute angle. Furthermore, the smaller the second angle 54 between the first drive electrode portion 32 and the second drive electrode portion 34, the denser the distribution of the first drive electrode portion 32 and the second drive electrode portion 34 on the touch panel, the larger the area covered by the drive electrode 30 on the touch panel, that is, the larger the area of ​​overlap between the drive electrode 30 and the sensing electrode 10, and the higher the touch accuracy of the capacitive touch screen with the corresponding GFF structure.

[0037] The drive electrode 30 is electrically connected to the flexible circuit board 20 via its second end portion 300 facing the flexible circuit board 20. Specifically, the first drive electrode portion 32 of the drive electrode 30 located at the end facing the flexible circuit board 20 is electrically connected to the flexible circuit board 20. Specifically, the drive electrode 30 includes an initial first drive electrode portion 32. This initial first drive electrode portion 32 is the first drive electrode portion 32 located at the end facing the flexible circuit board 20, i.e., the first drive electrode portion 32 closest to the flexible circuit board 20. Starting from the initial first drive electrode portion 32, the second drive electrode portions 34 are arranged alternately with the first drive electrode portions 32 along the length of the touch panel. The end of the initial first drive electrode portion 32 facing the flexible circuit board 20 is electrically connected to the flexible circuit board 20, i.e., the drive electrode 30 is electrically connected to the flexible circuit board 20 via one of its longitudinal ends.

[0038] In this embodiment, the drive electrodes 30 are conductive films formed of a transparent conductive material. In a preferred embodiment, the drive electrodes 30 are patterned indium tin oxide (ITO) films. Furthermore, there are multiple drive electrodes 30 arranged in an array along the width of the touch panel.

[0039] Two sensing electrode sections 14 are provided with a first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14, which is greater than 0 degrees but less than 180 degrees. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 0 degrees, the sensing electrodes 10 are equivalently arranged in the width direction of the touch panel. In this case, a black light shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 180 degrees, the sensing electrodes 10 are equivalently arranged in the length direction of the touch panel, causing the sensing electrodes 10 and the driving electrodes 30 to completely overlap. In this case, the capacitive coupling between the sensing electrodes 10 and the driving electrodes 30 reaches full saturation, which is not conducive to the detection of touch signals. The flexible circuit board 20 is located at one end in the length direction of the touch panel. The sensing electrode 10 is electrically connected to the flexible circuit board 20 through the first end portion 100 facing the flexible circuit board 20. The conductive lead 40 does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0040] In this embodiment, the second angle 54 between each pair of interconnected first drive electrode segments 32 and second drive electrode segments 34 is the same. Furthermore, the first drive electrode segments 32 and second drive electrode segments 34 are arranged at a uniform density. The overlapping portions of the first drive electrode segments 32 and sensing electrodes 10 and the overlapping portions of the second drive electrode segments 34 and sensing electrodes 10 are the same size and evenly distributed. This results in a uniformly distributed capacitance structure, and the GFF touch panel exhibits high touch accuracy.

[0041] In this embodiment, the first drive electrode portion 32 and the second drive electrode portion 34 are integrally formed by patterning, that is, the first drive electrode portion 32 and the second drive electrode portion 34 are simultaneously formed after the drive electrode 30 is patterned. Specifically, the first drive electrode portion 32 and the second drive electrode portion 34 are patterned indium tin oxide (ITO) films, and the patterning method can be laser etching or chemical etching. The process of integrally forming the first drive electrode portion 32 and the second drive electrode portion 34 is simple and easy, and the electrical conductivity between the first drive electrode portion 32 and the second drive electrode portion 34 is good, which reduces the impedance of the drive electrode 30, thereby improving the touch accuracy of the touch panel and improving the touch effect.

[0042] In this embodiment, the touch panel also includes a conductive lead 40, and the driving electrode 30 is electrically connected to the flexible circuit board 20 through the conductive lead 40. Furthermore, the conductive lead 40 is an opaque metal lead. In a preferred embodiment, the conductive lead 40 is a silver glue wire, that is, a silver wire formed by a silver glue layer through chemical etching or laser etching. The silver glue wire has good conductivity, reduces the overall impedance of the touch panel, and improves the touch effect. Furthermore, the flexible circuit board 20 is provided with a plurality of binding points, and the silver glue wire is electrically connected to the binding point, so that the sensing electrode 10 or the driving electrode 30 is electrically connected to the flexible circuit board 20. In a preferred embodiment, the binding point is a metal sheet protruding from the flexible circuit board 20, which has good conductive properties. The combination of the silver glue wire and the binding point has a good conductive effect and is easy to bind.

[0043] In this embodiment, the touch panel also includes a cover plate. The cover plate, sensing electrodes 10, and driving electrodes 30 are stacked together. A light-shielding layer is printed on the edge of the cover plate to shield the conductive leads 40 and flexible circuit board 20. Specifically, the cover plate is made of a transparent material such as glass or plastic. It protects the touch panel and display panel while also allowing the user's finger to perform touch operations. The light-shielding layer at the edge of the cover plate shields the top or bottom of the touch panel, correspondingly shielding the opaque conductive leads 40 and flexible circuit board 20, enhancing the appearance of the display device.

[0044] In this embodiment, the first angle 52 and the second angle 54 are of the same size. Furthermore, the first sensing electrode portion 12 and the first driving electrode portion 32 are of the same size, and the second sensing electrode portion 14 and the second driving electrode portion 34 are of the same size. This ensures that the overlapping portions of the sensing electrodes 10 and the driving electrodes 30 are evenly distributed, and the touch effect of each portion of the capacitive touch panel is the same, thereby improving touch accuracy.

[0045] In this embodiment, the sensing electrodes 10 and the driving electrodes 30 are symmetrical about the length of the touch panel. This ensures that the sensing electrodes 10 and the driving electrodes 30 have sufficient overlapping area. This prevents the sensing electrodes 10 and the driving electrodes 30 from completely overlapping, which would result in overlap between the overlapping portions of the sensing electrodes 10 and the conductive leads 40 and between the overlapping portions of the driving electrodes 30 and the conductive leads 40. This improves the electrical connection between the sensing electrodes 10 and the conductive leads 40, and between the driving electrodes 30 and the conductive leads 40, and prevents short circuits.

[0046] In this embodiment, the vertical projection of each first sensing electrode section 12 on the touch panel at least partially overlaps with at least one first driving electrode section 32, and the vertical projection of each second sensing electrode section 14 on the touch panel at least partially overlaps with at least one second driving electrode section 34. In a preferred embodiment, the vertical projection of each first sensing electrode section 12 on the touch panel intersects with multiple first driving electrode sections 32, and the vertical projection of each second sensing electrode section 14 on the touch panel intersects with multiple second driving electrode sections 34. This increases the overlapping area of ​​the sensing electrodes 10 and the driving electrodes 30, improves the distribution density of the capacitive touch panel, and thereby enhances touch accuracy and touch effect.

[0047] Two sensing electrode sections 14 are provided with a first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14, which is greater than 0 degrees but less than 180 degrees. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 0 degrees, the sensing electrodes 10 are equivalently arranged in the width direction of the touch panel. In this case, a black light shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 180 degrees, the sensing electrodes 10 are equivalently arranged in the length direction of the touch panel, causing the sensing electrodes 10 and the driving electrodes 30 to completely overlap. In this case, the capacitive coupling between the sensing electrodes 10 and the driving electrodes 30 reaches full saturation, which is not conducive to the detection of touch signals. The flexible circuit board 20 is located at one end in the length direction of the touch panel. The sensing electrode 10 is electrically connected to the flexible circuit board 20 through the first end portion 100 facing the flexible circuit board 20. The conductive lead 40 does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0048] An embodiment of the present invention further provides a display device comprising a display panel and the aforementioned touch panel, wherein the display panel and the touch panel are stacked, and an image is output by the display panel and displayed through a transparent area of ​​the touch panel. In this embodiment, the display device includes a mobile phone, a tablet computer, a television, and the like.

[0049] Furthermore, the display device also includes a system motherboard, a shell and a battery. The system motherboard is electrically connected to the touch panel and the display panel and controls the operation of the electrically connected touch panel and the display panel. The battery is used to supply power to the motherboard. The shell accommodates the motherboard, battery, touch panel and display panel, and plays a role in protecting the internal components of the display device and its aesthetics.

[0050] Two sensing electrode sections 14 are provided with a first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14, which is greater than 0 degrees but less than 180 degrees. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 0 degrees, the sensing electrodes 10 are equivalently arranged in the width direction of the touch panel. In this case, a black light shielding layer needs to be printed on both sides of the touch panel, increasing the size of the frame. When the first angle 52 between adjacent first sensing electrode sections 12 and second sensing electrode sections 14 is 180 degrees, the sensing electrodes 10 are equivalently arranged in the length direction of the touch panel, causing the sensing electrodes 10 and the driving electrodes 30 to completely overlap. In this case, the capacitive coupling between the sensing electrodes 10 and the driving electrodes 30 reaches full saturation, which is not conducive to the detection of touch signals. The flexible circuit board 20 is located at one end in the length direction of the touch panel. The sensing electrode 10 is electrically connected to the flexible circuit board 20 through the first end portion 100 facing the flexible circuit board 20. The conductive lead 40 does not need to pass through the left and right sides of the touch panel (the two ends in the width direction of the touch panel). Accordingly, there is no need to print a black light-shielding layer on the left and right sides of the touch panel, thereby reducing the size of the frame, thereby increasing the size of the visible area, and improving the screen-to-body ratio of the display device, which is conducive to achieving a narrow frame or even a frameless design and improving the user experience.

[0051] The above disclosures are merely some preferred embodiments of the present invention, which certainly cannot be used to limit the scope of the present invention. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A touch panel, characterized in that: The touch panel includes sensing electrodes and a flexible circuit board. The sensing electrodes include first sensing electrode portions and second sensing electrode portions that are sequentially and alternately connected along the length direction of the touch panel. A first angle greater than 0 degrees and less than 180 degrees is defined between adjacent first sensing electrode portions and second sensing electrode portions. The flexible circuit board is located at one end in the length direction of the touch panel. The sensing electrodes are electrically connected to the flexible circuit board via first ends facing the flexible circuit board.

2. The touch panel according to claim 1, wherein: The first angles between each pair of the first sensing electrode portions and the second sensing electrode portions connected to each other are the same.

3. The touch panel according to claim 2, wherein: The touch panel also includes a drive electrode, which is stacked with the sensing electrode. The drive electrode includes a first drive electrode portion and a second drive electrode portion that are sequentially and staggeredly connected along the length direction of the touch panel. A second angle greater than 0 degrees and less than 180 degrees is defined between adjacent first drive electrode portions and second drive electrode portions. The drive electrode is electrically connected to the flexible circuit board via a second end portion facing the flexible circuit board.

4. The touch panel according to claim 3, wherein: The second included angles between each pair of the first driving electrode portion and the second driving electrode portion connected to each other are the same.

5. The touch panel according to claim 4, wherein: The first angle and the second angle are the same in size.

6. The touch panel according to claim 5, wherein: The sensing electrodes and the driving electrodes are symmetrical with respect to a length direction of the touch panel.

7. The touch panel according to claim 6, wherein: A vertical projection of each first sensing electrode portion on the touch panel at least partially overlaps with at least one first driving electrode portion, and a vertical projection of each second sensing electrode portion on the touch panel at least partially overlaps with at least one second driving electrode portion.

8. The touch panel according to claim 3, wherein: The touch panel further includes conductive leads, through which the sensing electrodes are electrically connected to the flexible circuit board, and through which the driving electrodes are electrically connected to the flexible circuit board.

9. The touch panel according to claim 3, wherein: The first sensing electrode portion and the second sensing electrode portion are integrally formed by patterning, and the first driving electrode portion and the second driving electrode portion are integrally formed by patterning.

10. A display device, characterized in that: The display device includes a display panel, a main board, and the touch panel according to any one of claims 1 to 9, wherein the display panel and the touch panel are stacked, the display panel outputs an image and displays it through a transparent area of ​​the touch panel, and the touch panel is electrically connected to the main board through the flexible circuit board so that the touch signal received by the touch panel is transmitted to the main board.

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