Touch panel

Abstract

The present invention discloses a touch panel. The touch panel includes a transparent substrate and a transparent conductive layer formed on the surface of the substrate. The transparent conductive layer is formed with electrode pairs arranged in an array and a plurality of leads connected to the electrode pairs. Each pair of electrode pairs includes a driving electrode and a receiving electrode that are mutually insulated and mutually inductively coupled. The plurality of driving electrodes in a column of electrode pairs are mutually insulated and the plurality of receiving electrodes are mutually insulated. The plurality of leads connected to a column of electrode pairs are located on both sides of the corresponding column of electrode pairs. According to the touch panel of the present invention, using a single-layer transparent conductive layer to form mutually inductive driving electrodes and receiving electrodes and connecting them to a circuit board through leads not only improves the light transmittance compared with a double-layer conductive layer, but also saves the wiring area on both the left and right sides of the screen, and can achieve the effect of borderless on three sides, thereby improving the screen-to-body ratio of the screen.

Description

Technical Field

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

[0002] The touch panel in the related art includes a substrate and electrodes formed on the substrate and arranged in an array. The electrodes are connected to a detection circuit through row leads. Since the row leads need to run along the left and right side edges of the substrate, black matrix (BM) regions are formed at the left and right side edges of the substrate, resulting in a limitation of the screen-to-body ratio of the touch screen when the touch panel is applied to the touch screen. Summary of the Invention

[0003] In view of this, an embodiment of the present invention provides a touch panel, including a transparent substrate and a transparent conductive layer formed on the surface of the substrate. The transparent conductive layer is formed with electrode pairs arranged in an array and multiple leads connected to the electrode pairs. Each pair of the electrode pairs includes a driving electrode and a receiving electrode that are mutually insulated and mutually inductively coupled. The multiple driving electrodes in a column of the electrode pairs are mutually insulated and the multiple receiving electrodes are mutually insulated; the multiple leads connected to a column of the electrode pairs are located on both sides of the corresponding column of the electrode pairs.

[0004] For the touch panel according to the embodiment of the present invention, a single-layer transparent conductive layer can be used to arrange the leads on both sides of the corresponding column of electrode pairs without affecting or to a large extent without affecting the light transmittance of the touch panel. In this way, there is no need to run metal leads on the left and right sides of the substrate to connect to the detection circuit, so that the left and right black frame regions do not need to be reserved, and thus the screen-to-body ratio of the touch screen is improved.

[0005] In some embodiments, the transparent conductive layer is made of a conductive material with a light transmittance greater than or equal to 85%.

[0006] Based on the visual resolution ability of the human eye, when the light transmittance of the material is greater than or equal to 85%, within the visible light range (380nm - 780nm), the human eye can clearly recognize the content of the display screen and better receive the visual effect presented by the display screen.

[0007] In some embodiments, the driving electrode and the receiving electrode are in a horseshoe shape, the notch directions of the driving electrode and the receiving electrode are parallel to the row direction of the electrode pair, and the notch directions of the driving electrode and the receiving electrode are oppositely arranged and nested.

[0008] The opposite arrangement and nesting of the notches of the driving electrode and the receiving electrode increase the mutual inductance area between them, improve the sensitivity of detecting capacitance changes, and enhance the response speed of finger touch on the touch screen.

[0009] In some embodiments, the multiple leads connected to the multiple driving electrodes of a column of the electrode pairs are located on the same side of the corresponding column of the electrode pairs, while the multiple leads connected to the multiple receiving electrodes of the corresponding column of the electrode pairs are located on the other side of the corresponding column of the electrode pairs.

[0010] By reasonably arranging the layout positions of the leads, the driving electrodes, and the receiving electrodes, it is beneficial to simplify the manufacturing process of the leads and effectively shorten the manufacturing time.

[0011] In some embodiments, the multiple leads include main leads arranged along the column direction parallel to the electrode pairs and connection leads extending from the main leads along the row direction parallel to the electrode pairs to the electrode pairs.

[0012] The signal leads are connected to the corresponding electrode pairs by arranging multiple main leads and corresponding branch connection leads, realizing the transmission of signals between the sensing layer and the processor. The leads are arranged in parallel at the shortest distance, which is beneficial to simplifying the total length of the leads, improving the efficiency of the manufacturing process, and also making the cost lower.

[0013] In some embodiments, the main leads include driving main leads and receiving main leads, the connection leads include driving connection leads and receiving connection leads, the driving main leads are arranged in parallel and at intervals, one end of the driving main leads is connected to the driving connection leads, and the other end of the driving main leads extends above the substrate along the column direction of the electrode pairs; the receiving main leads are arranged in parallel and at intervals, one end of the receiving main leads is connected to the receiving connection leads, and the other end of the receiving main leads extends above the substrate along the column direction of the electrode pairs.

[0014] The driving main leads are connected to the corresponding driving electrodes, and the receiving main leads are connected to the corresponding receiving electrodes. Each driving main lead and each receiving main lead are arranged in parallel and at intervals, so that the leads are arranged at the shortest distance and rationally, which is beneficial to maximizing the reduction of the total length of the leads. At the same time, the leads are arranged at intervals to avoid signal interference caused by contact between the leads.

[0015] In some embodiments, the substrate includes a display area and a border area located outside the display area. The electrode pairs are located in the display area, an ink layer is coated on the border area, and the main leads cross the junction of the display area and the border area.

[0016] By dividing the display area and the border area, the sensing layer is set in the display area to show the visual effect. At the same time, the opaque border conductive layer is set in the border area. The border area coated with the ink layer not only enhances the light-shielding ability, but also the cured coating has excellent adhesion, making the transparent conductive layer and the border conductive layer attached thereto not easy to fall off.

[0017] In some embodiments, the touch panel satisfies the following conditional expression: 0 < W / (L + W) < 0.02, where W is the width of the border area and L is the length of the display area.

[0018] Screen occupation ratio = area of the display area / total area of the screen * 100%. If the width W of the border area is too large, the display area of the screen will become smaller, reducing the screen occupation ratio of the touch screen. By limiting the width of the border area, the screen occupation ratio of the touch panel is maintained above 98%. In addition, reserving a certain width for the border area is beneficial for placing the opaque border conductive layer.

[0019] In some embodiments, multiple leads include main leads arranged along the column direction parallel to the electrode pair. The touch panel includes a border conductive layer formed on the surface of the transparent conductive layer and connected to the main leads. The border conductive layer makes the end of the border conductive layer located on the back of the display screen through a bending method.

[0020] After the border conductive layer formed on the transparent conductive layer undergoes a bending operation, most of the border conductive layer is placed on the back of the display screen, significantly reducing the area occupied by the border area on the screen, thereby increasing the screen occupation ratio of the touch panel.

[0021] In some embodiments, the border conductive layer is made of materials such as gold, silver, copper, aluminum, nickel, zinc, or an alloy composed of any two or more of them.

[0022] Since metal atoms have fewer valence electrons and the outer electron layer is not full, there are electron vacancies. Under the action of voltage, foreign electrons enter the electron vacancies, and the extra electrons move by changing positions between the electron vacancies to form an electric current. Therefore, metals have good electrical conductivity, so the second conductive layer formed on the main lead can well transmit signals to and from the processor. In addition, since the radius of metal atoms is relatively large and the number of valence electrons is relatively small, electrons are easily detached from metal atoms to become free electrons. Therefore, when the crystal is subjected to an external force, the metal positive ions slide without breaking, making it have good ductility and flexibility, and thus it is not easy to break during the bending operation.

[0023] In some embodiments, the substrate includes a display area, a border area located outside the display area, and a bending area located within the border area. The distance from the bending area to the display area is greater than or equal to 0, and the distance from the bending area to the display area is greater than or equal to the distance from the leading end of the border conductive layer to the display area.

[0024] Due to the poor ductility and flexibility of the transparent conductive layer and the good ductility and flexibility of the border conductive layer, the transparent conductive layer with the border conductive layer part has good flexibility. Therefore, when performing a bending operation, by limiting the distance from the bending point to the transparent conductive layer without the border conductive layer, it is possible to avoid bending or breaking the single-layer transparent conductive layer.

[0025] In some embodiments, the substrate includes a display area and a border area located outside the display area. The leading end of the border conductive layer is located within the border area, and the distance from the leading end of the border conductive layer to the display area is greater than or equal to 0.

[0026] Since the border conductive layer is opaque, by restricting the distance from the border conductive layer to the display area during the preparation of the border conductive layer, it is possible to avoid a reduction in the screen occupation ratio of the touch panel screen due to the appearance of the border conductive layer in the display area. Additionally, it is possible to maximize the coverage of the border layer over the leads located in the border area, providing a sufficient bending range for subsequent bending operations to avoid breaking the single-layer transparent conductive layer.

[0027] In some embodiments, the touch panel includes a protective layer. One surface of the protective layer covers the transparent conductive layer and the border conductive layer, and the other surface is attached to the front surface of the display screen.

[0028] The protective layer covers the transparent conductive layer and the border conductive layer. Since the protective layer is made of an insulating material, after being attached to the display screen, it isolates the transparent conductive layer and the border conductive layer from signal interference caused by other external factors during operation. At the same time, it also plays a role in fixing and preventing signal interference caused by contact between electrode pairs, or between leads, or between electrode pairs and leads.

[0029] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and / or additional aspects and advantages of the present invention will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, where:

[0031] Figure 1 is a schematic structural diagram of a touch panel according to some embodiments of the present invention.

[0032] Figure 2 is Figure 1 a partial schematic view of the touch panel at II in

[0033] Figure 3 is Figure 1 a partial schematic view of the touch panel at III in

[0034] Figure 4 Is Figure 1 A schematic cross-sectional view along line IV-IV of the touch panel in

[0035] Figure 5 A schematic structural view of the touch panel according to some embodiments of the present invention.

[0036] Description of main component symbols:

[0037] Touch panel 10, transparent substrate 11, display area 12, border area 13, transparent conductive layer 14, electrode pair 15, lead 16, border conductive layer 17, bending area 18, display screen 20, protective layer 30, flexible printed circuit board 40, ink layer 131, junction 132, driving electrode 151, receiving electrode 152, main lead 161, connecting lead 162, first end 171, second end 172, driving electrode notch 1511, receiving electrode notch 1521, driving main lead 1611, receiving main lead 1612, driving connecting lead 1621, receiving connecting lead 1622. Specific embodiments

[0038] The following describes in detail the embodiments of the present invention. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0039] Please refer to Figure 1 , the touch panel 10 according to the embodiment of the present invention includes a transparent substrate 11 and a transparent conductive layer 14 formed on the transparent substrate 11. The transparent conductive layer 14 is formed with an array of electrode pairs 15 and a plurality of leads 16 connected to the electrode pairs 15. Each pair of electrode pairs 15 includes a driving electrode 151 and a receiving electrode 152 that are mutually insulated and mutually inductively coupled. The plurality of driving electrodes 151 in a column of electrode pairs 15 are mutually insulated from each other, and the plurality of receiving electrodes 152 are mutually insulated from each other. The plurality of leads 16 connected to a column of electrode pairs 15 are located on both sides of the corresponding column of electrode pairs 15.

[0040] For the touch panel 10 according to the embodiment of the present invention, by using a single-layer transparent conductive layer 14, the leads 16 can be arranged on both sides of the corresponding column of electrode pairs 15 without affecting or largely not affecting the light transmittance of the touch panel 10. In this way, there is no need to run metal leads on the left and right sides of the substrate 11 to connect to the detection circuit, so that there is no need to reserve black border areas on the left and right, thereby improving the screen-to-body ratio of the touch screen.

[0041] Specifically, the transparent substrate 11 can be made of glass or plastic. Glass has excellent optical stability, with a light transmittance as high as 95%, low raw material costs, precise mold forming dimensions, and mature technologies and processes, thus having a relatively low cost. Plastic has stable chemical properties, is impact-resistant and wear-resistant, has a light transmittance of 90% and is not easily broken, with low raw material costs and simple manufacturing processes.

[0042] In some embodiments, by using a transparent conductive material as the sensing layer (electrode pair 15) and the lead 16, the effect of a borderless three sides can be achieved, bringing a better experience to users. Additionally, the transparent conductive layer 14 can be formed by vacuum evaporation coating method in a vacuum chamber to form a vapor flow of raw materials and incident on the surface of the substrate 11 to condense into a thin film-like transparent conductive layer 14. Or by magnetron sputtering method, using an electric field to sputter atoms of the material onto the substrate 11 to form a deposition of the transparent conductive layer 14. Or by chemical vapor deposition method to chemically react the reactants and generate a solid substance deposition to form the transparent conductive layer 14.

[0043] In some embodiments, the transparent conductive layer 14 is made of a conductive material with a light transmittance greater than or equal to 85%.

[0044] Based on the visual resolution ability of the human eye, when the light transmittance of the material is greater than or equal to 85%, within the visible light range (380nm - 780nm), the human eye can clearly recognize the content of the display screen and better receive the visual effects presented by the display screen.

[0045] Specifically, the transparent conductive layer 14 can be made of a conductive film with low resistivity and high transmittance, and can adopt metal film systems, oxide film systems, other compound film systems, or polymer film systems and composite film systems, etc. The transparent conductive layer 14 can adopt indium tin oxide (ITO) or carbon nanotube materials. The film made of indium tin oxide is transparent within the visible light range (380nm - 780nm), with a light transmittance of over 90%. The combination of high visible light region transmittance and low resistivity makes the ITO film a typical transparent conductive film material. Carbon nanotubes are formed by curling graphite carbon atom layers, with a tube diameter generally ranging from a few nanometers to dozens of nanometers and a tube wall thickness of only a few nanometers. Therefore, the film made of carbon nanotubes is transparent based on human eye vision. Due to the hexagonal structure formed between carbon atoms in carbon nanotubes, there is a lone pair of electrons surrounding each carbon atom, making it have quite good electrical conductivity.

[0046] In certain embodiments, the transparent conductive layer 14 can adopt a fluorine-doped SnO2 transparent conductive material or an aluminum-doped zinc oxide (ZnO) transparent conductive material, or can also be a conductive layer made of extremely fine metal grids or nano silver.

[0047] In some embodiments, the driving electrode 151 and the receiving electrode 152 are disposed on the same layer.

[0048] The driving electrode 151 and the receiving electrode 152 form a single-layer induction layer with mutual inductance coupling, which has good optical properties. It not only improves the light transmittance compared with the double-layer conductive layer, but also makes the overall thickness of the touch panel 10 appear thinner. In addition, since the cost of ITO accounts for about 40% of the total cost, the single-layer induction layer can significantly reduce the production cost.

[0049] Specifically, the driving electrode 151 emits a low-frequency signal to the receiving electrode 152. When a finger touches the touch screen, it causes a change in the capacitance value, resulting in a signal lag or lead. After the receiving electrode 152 receives the signal, it performs processing and calculation to obtain the specific position where the finger touches the touch screen.

[0050] Please refer to Figure 1 and Figure 2 , in some embodiments, the driving electrode 151 and the receiving electrode 152 are in a horseshoe shape, and the orientations of the notches 1511 of the driving electrode and the notches 1521 of the receiving electrode are parallel to the row direction of the electrode pair 15. The orientations of the notches 1511 of the driving electrode and the notches 1521 of the receiving electrode are oppositely arranged and nested.

[0051] The relative setting and nested arrangement of the driving electrode notch 1511 and the receiving electrode notch 1521 increase the mutual inductance area between the driving electrode 151 and the receiving electrode 152, improve the sensitivity of detecting capacitance changes, and enhance the response speed of finger touching the touch screen.

[0052] Specifically, the shapes of the driving electrode 151 and the receiving electrode 152 can be rectangular, triangular or other patterns. Each pattern can be arranged independently, or arranged sequentially, or staggeredly, or in a stepped manner. The specific graphic design can be designed according to the IC driving ability and computing ability. However, these patterns are for illustrative purposes and the embodiments of the present invention are not limited thereto.

[0053] In some embodiments, multiple leads 16 connected to the multiple driving electrodes 151 of one column of electrode pairs 15 are located on the same side of the corresponding column of electrode pairs 15, while multiple leads 16 connected to the multiple receiving electrodes 152 of the corresponding column of electrode pairs 15 are located on the other side of the corresponding column of electrode pairs 15.

[0054] By reasonably arranging the arrangement positions of the leads 16, the driving electrode 151 and the receiving electrode 152, it is beneficial to simplify the manufacturing process of the leads 16 and effectively shorten the manufacturing time.

[0055] In some embodiments, the multiple leads 16 include a main lead 161 arranged along the column direction parallel to the electrode pair 15 and a connection lead 162 extending from the main lead 161 along the row direction parallel to the electrode pair 15 to the electrode pair 15.

[0056] The leads 16 are connected to the corresponding electrode pairs 15 by arranging multiple main leads 161 and corresponding branch connection leads 162, realizing the transmission of signals between the induction layer and the processor. The leads 16 are arranged in parallel at the shortest distance, which is beneficial to simplifying the total length of the leads 16, improving the efficiency of the manufacturing process, and also reducing the cost.

[0057] Specifically, the main leads 161 and the connection leads 162 can be arranged in columns according to the IC design requirements. Each lead is separated from each other without intersection, so there is no need to make an insulating layer at the intersection of different lines, simplifying the manufacturing process and improving the manufacturing efficiency.

[0058] In some embodiments, the main lead 161 includes a driving main lead 1611 and a receiving main lead 1612, and the connection lead 162 includes a driving connection lead 1621 and a receiving connection lead 1622. The driving main leads 1611 are arranged in parallel and at intervals. One end of the driving main lead 1611 is connected to the driving connection lead 1622, and the other end of the driving main lead 1611 extends above the substrate 11 along the column direction of the electrode pair 15. The receiving main leads 1612 are arranged in parallel and at intervals. One end of the receiving main lead 1612 is connected to the receiving connection lead 1621, and the other end of the receiving main lead 1612 extends above the substrate 11 along the column direction of the electrode pair 15.

[0059] The driving main lead 1611 is connected to the corresponding driving electrode 151 through the driving connection lead 1621, and the receiving main lead 1612 is connected to the corresponding receiving electrode 152 through the receiving connection lead 1622. Each driving main lead 1611 and each receiving main lead 1612 are arranged in parallel and at intervals, so that each lead is arranged at the shortest distance and rationally, which is beneficial to maximizing the reduction of the total length of the leads. At the same time, each lead is arranged at intervals, avoiding signal interference caused by contact between the leads.

[0060] Please refer to Figure 1 、 Figure 3 and Figure 4 , in some embodiments, the substrate 11 includes a display area 12 and a border area 13 located outside the display area 12. The electrode pair 15 is located in the display area 12. An ink layer 131 is coated on the border area 13, and the main lead 161 crosses the junction 132 between the display area 12 and the border area 13.

[0061] By dividing the display area 12 and the border area 13, the sensing layer is arranged in the display area 12 to present a visual effect. At the same time, the opaque border conductive layer 17 is arranged in the border area 13. The border area 13 coated with the ink layer 131 not only enhances the light-shielding ability, but also the cured coating has excellent adhesion, making the transparent conductive layer 14 and the border conductive layer 17 attached thereto not easy to fall off.

[0062] Specifically, the border area 13 can be arranged above the display area 12. However, the positions of the border area 13 and the display area 12 are for illustrative purposes and the embodiments of the present invention are not limited thereto. The border area 13 can also be located below the display area 12. In addition, the border area 13 is coated with a black ink layer 131, which can improve the optical density of the touch panel 10 in the border area 13, creating a good visual effect while ensuring the light-shielding effect.

[0063] Please refer to Figure 1 , in some embodiments, the touch panel 10 satisfies the following conditional formula: 0 < W / (W + L) < 0.02, where W is the width of the border area 13 and L is the length of the display area 12.

[0064] Screen occupation ratio = area of the display area 12 / total screen area * 100%. If the width W of the border area 13 is too large, the display area 12 of the screen will become smaller, reducing the screen occupation ratio of the touch screen. By limiting the width of the border area 13, the screen occupation ratio of the touch panel is maintained above 98%. In addition, leaving a certain width for the border area 13 can be used to place the opaque border conductive layer 17.

[0065] Specifically, taking the length (width W of the border area 13 + length L of the display area 12) of a 5.5-inch mobile phone touch screen as 145 mm and the width W of the border area 13 as 1.4 mm, the screen occupation ratio reaches 99%. On the other hand, limiting the width of the border area 13 can save the ink layer 131 coated thereon and reduce the cost of the ink layer 131.

[0066] Please refer to Figure 1 , Figure 4 and Figure 5 , in some embodiments, multiple leads 16 include main leads 161 arranged along the column direction parallel to the electrode pair 15. The touch panel 10 includes a border conductive layer 17 formed on the surface of the transparent conductive layer 14 and connected to the main leads 161. The border conductive layer 17 makes the end 172 of the border conductive layer 17 located on the back of the display screen 20 through a bending method.

[0067] After the bending operation of the border conductive layer 17 formed on the transparent conductive layer 14, most of the border conductive layer 17 located within the border area 13 is placed on the back of the display screen 20, significantly reducing the area occupied by the border area 13 on the screen, thereby increasing the screen-to-body ratio of the touch panel 10. Most of the bending in this embodiment refers to the border conductive layer 17 including the transparent conductive layer 14. However, the embodiments of the present invention are not limited thereto, and most of the bending may also only contain the border conductive layer 14.

[0068] Specifically, the bent border conductive layer 17 reduces the area occupied by the border area 13, which is beneficial to narrowing the width W of the border area 13, increasing the screen-to-body ratio of the touch panel 10, and also saving the cost of the ink layer 131. The end 172 of the bent border conductive layer 17 can be fixed to the flexible printed circuit board 40 together behind the display screen 20 through double-sided tape or foam tape.

[0069] In some embodiments, the border conductive layer 17 is made of materials such as gold, silver, copper, aluminum, nickel, zinc, or any alloy composed of any two or more of them.

[0070] Since metal atoms have fewer valence electrons and the outer electron layer is not full, there are electron vacancies. Under the action of voltage, external electrons enter the electron vacancies, and the extra electrons move by changing positions among the electron vacancies, thus forming an electric current. Therefore, metals have good electrical conductivity. So, the border conductive layer 17 formed on the main lead 161 can well transmit signals with the processor. In addition, since the radius of metal atoms is relatively large and the number of valence electrons is relatively small, electrons are easily detached from metal atoms to become free electrons. Therefore, when the crystal is subjected to external forces, the metal positive ions slide without breaking, making it have good ductility and flexibility. Thus, it is not easy to break during the bending operation.

[0071] Specifically, the border conductive layer 17 can be formed by vacuum evaporation coating method in a vacuum chamber to form a vapor flow of raw materials and incident on the surface of the substrate 11 to condense into a conductive layer. Or by magnetron sputtering method, using an electric field to sputter the atoms of the material on the substrate 11 to form the deposition of the conductive layer. Or by chemical vapor deposition method to make the reaction substances undergo a chemical reaction and generate a solid substance to deposit and form a conductive layer.

[0072] Please refer to Figure 1 and Figure 3 , in some embodiments, the substrate 11 includes a display area 12 and a border area 13 located outside the display area 12. The bending area 18 is located within the border area 13. The distance from the bending area 18 to the display area 12 is greater than or equal to 0, and the distance from the bending area 18 to the display area 12 is greater than or equal to the distance from the leading end 171 of the border conductive layer 17 to the display area 12.

[0073] Due to the poor ductility and flexibility of the transparent conductive layer 14 and the good ductility and flexibility of the border conductive layer 17, the transparent conductive layer 14 with the part of the border conductive layer 17 has good flexibility. Therefore, during the bending operation, by limiting the distance from the bending area to the transparent conductive layer 14 without the border conductive layer 17, the single-layer transparent conductive layer 14 can be prevented from being bent or broken.

[0074] Specifically, the distance from the bending area 18 to the display area 12, that is, the distance from the bending area 18 to the connection area 132, can be about 0.8 mm, and the distance from the bending area 18 to the leading end 171 of the border conductive layer 17 can be about 0.5 mm. By reserving sufficient distance, the difficulty of the bending process can be reduced, and at the same time, the yield rate of the bending process can be ensured.

[0075] In some embodiments, the substrate 11 includes a display area 12 and a border area 13 located outside the display area 12. The leading end 171 of the border conductive layer 17 is located within the border area 13, and the distance from the leading end 171 of the border conductive layer 17 to the display area 12 is greater than or equal to 0.

[0076] Since the border conductive layer 17 is opaque, by limiting the distance from the border conductive layer 17 to the display area 12 during the preparation of the border conductive layer 17, that is, the distance from the leading end 171 to the connection area 132, the reduction of the screen occupation ratio of the touch panel 10 screen caused by the appearance of the border conductive layer 17 in the display area 12 is avoided. In addition, it is beneficial for the border conductive layer 17 to maximize the coverage of the main lead 161 located in the border area 13, providing a sufficient bending range for the subsequent bending operation to prevent the single-layer transparent conductive layer 14 from being broken.

[0077] Specifically, the distance from the leading end 171 of the border conductive layer 17 to the display area 12 can be set at about 0.3 mm to ensure that the border conductive layer 17 will not shift into the display area 12 during the preparation process, thereby improving the yield rate of the bending process.

[0078] Please refer to Figure 5 , in some embodiments, the touch panel 10 includes a protective layer 30. The protective layer 30 and the transparent conductive layer 14 are located on the same side of the substrate 11. One surface 310 of the protective layer 30 covers the transparent conductive layer 14 and the border conductive layer 17, and the other surface 320 of the protective layer 30 is attached to the front surface of the display screen 20, and the surface 310 and the surface 320 face away from each other.

[0079] The protective layer 30 is made of an insulating material. After being attached to the display screen 20, it isolates the interference of external factors to the signals of the transparent conductive layer 14 and the border conductive layer 17 during the working process, and at the same time plays a role in fixing and preventing the possible touch caused by the detachment between the electrode pairs 15 or between the leads 16 or between the electrode pairs 15 and the leads 16 from causing signal disturbance.

[0080] Specifically, the protective layer 30 and the display screen 20 are bonded together by an optical adhesive, and an OCA adhesive or other optical adhesives with high light transmittance, high adhesiveness, high heat resistance, and UV resistance can be used.

[0081] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "row direction", "column direction", "center", "longitudinal", "transverse", "length", "width", "thickness", "edge", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, the meanings of "a plurality" and "a plurality of" refer to a quantity of two or more, unless otherwise specifically defined.

[0082] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. It may be a mechanical connection or an electrical connection. It may be directly connected or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under", and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0084] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can recognize the application of other processes and / or the use of other materials.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A touch panel, characterized in that, Comprising: A transparent substrate; And A transparent conductive layer formed on the surface of the substrate, the transparent conductive layer being formed with electrode pairs arranged in an array and a plurality of leads connected to the electrode pairs, each pair of the electrode pairs including a driving electrode and a receiving electrode that are insulated from each other and mutually inductively coupled, the plurality of driving electrodes in a column of the electrode pairs being insulated from each other and the plurality of receiving electrodes being insulated from each other; the plurality of leads connected to a column of the electrode pairs are located on both sides of the corresponding column of the electrode pairs; The transparent conductive layer is formed by a vacuum evaporation coating method in a vacuum chamber to form a vapor stream of raw materials and incident on the surface of the substrate to condense and form the film-like transparent conductive layer; or by a magnetron sputtering method, using an electric field to sputter atoms of the material on the substrate to form the deposition of the transparent conductive layer; or by a chemical vapor deposition method to cause a chemical reaction of reaction substances and generate a solid substance deposition to form the transparent conductive layer.

2. The touch panel according to claim 1, characterized in that, The transparent conductive layer is made of a conductive material with a light transmittance greater than or equal to 85%.

3. The touch panel according to claim 1, characterized in that, The driving electrode and the receiving electrode are in a horseshoe shape, the notch directions of the driving electrode and the receiving electrode are parallel to the row direction of the electrode pair, and the notch directions of the driving electrode and the receiving electrode are oppositely arranged and nested.

4. The touch panel according to claim 1, characterized in that, The plurality of leads connected to the plurality of driving electrodes in a column of the electrode pairs are located on the same side of the corresponding column of the electrode pairs, while the plurality of leads connected to the plurality of receiving electrodes in the corresponding column of the electrode pairs are located on the other side of the corresponding column of the electrode pairs.

5. The touch panel according to claim 1, characterized in that, The plurality of leads include main leads arranged along the column direction parallel to the electrode pairs and connection leads extending from the main leads along the row direction parallel to the electrode pairs to the electrode pairs.

6. The touch panel according to claim 5, characterized in that, The main leads include driving main leads and receiving main leads, the connection leads include driving connection leads and receiving connection leads, the driving main leads are arranged in parallel and at intervals, one end of the driving main lead is connected to the driving connection lead, and the other end of the driving main lead extends along the column direction of the electrode pairs above the substrate; the receiving main leads are arranged in parallel and at intervals, one end of the receiving main lead is connected to the receiving connection lead, and the other end of the receiving main lead extends along the column direction of the electrode pairs above the substrate.

7. The touch panel according to claim 5, characterized in that, The substrate includes a display area and a border area located outside the display area, the electrode pairs are located in the display area, an ink layer is coated on the border area, and the main leads cross the junction of the display area and the border area.

8. The touch panel according to claim 7, characterized in that, The touch panel satisfies the following conditional formula: 0 < W / (W + L) < 0.02, where W is the width of the border area and L is the length of the display area.

9. The touch panel according to claim 5, characterized in that, The plurality of leads include main leads arranged along the column direction parallel to the electrode pairs, the touch panel includes a border conductive layer formed on the surface of the transparent conductive layer and connected to the main leads, and the border conductive layer is bent so that the end of the border conductive layer is located on the back of the display screen.

10. The touch panel according to claim 9, characterized in that, The border conductive layer is made of a material such as gold, silver, copper, aluminum, nickel, zinc or an alloy composed of any two or more of them.

11. The touch panel according to claim 9, characterized in that, The substrate includes a display area, a border area extending outside the display area, and a bending area located within the border area. The distance from the bending area to the display area is greater than or equal to 0, and the distance from the bending area to the display area is greater than or equal to the distance from the leading end of the border conductive layer to the display area.

12. The touch panel according to claim 9, characterized in that, The substrate includes a display area and a border area extending outside the display area. The leading end of the border conductive layer is located within the border area, and the distance from the leading end of the border conductive layer to the display area is greater than or equal to 0.

13. The touch panel according to any one of claims 9 - 12, characterized in that, The touch panel includes a protective layer. One surface of the protective layer covers the transparent conductive layer and the border conductive layer, and the other surface is attached to the front surface of the display screen.

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