Electromagnetic touch display panel and electronic device

Abstract

The application relates to the technical field of flat panel display, and discloses an electromagnetic touch display panel, which comprises a sensing display area and a bonding area, the sensing display area comprises a first electrode layer, a second electrode layer and an insulating layer, the first electrode layer comprises a first electrode and a first metal lead, the second electrode layer comprises a plurality of second electrodes, a second metal lead and a metal connecting line, the insulating layer is provided with an opening at the intersection of the metal connecting lines, and the metal connecting lines avoid direct lapping between the metal connecting lines in the form of a jump hole. Therefore, the two second electrodes are communicated through the metal connecting line at the end of the second electrode away from the bonding area, the integration of the two input modes of touch and electromagnetic induction can be realized, the area of the metal lead wire of the periphery of the sensing display area is reduced, the electromagnetic touch display panel of the scheme can be applied to large-size electronic equipment, and the application scene is expanded.

Description

Technical Field

[0001] This invention relates to the field of flat panel display technology, and more particularly to an electromagnetic touch display panel and an electronic device. Background Technology

[0002] In the human-computer interaction design of contemporary e-book readers, dual-mode input technology, which combines finger touch and electromagnetic pen touch, has become the mainstream trend. Traditional dual-mode input technology solutions usually adopt a separate design of capacitive touch sensor and electromagnetic induction sensor. Although this architecture is mature and stable, it has limitations such as component redundancy and complex structure.

[0003] With technological advancements, the magnetic integration solution can simultaneously support capacitive finger touch and electromagnetic pen input using a single integrated sensor. This highly integrated design not only significantly improves touch accuracy and response speed but also optimizes the device's internal structure. For example... Figure 1 As shown, the core of this solution is to integrate an electromagnetic circuit channel into the TX / RX (transmit / receive) channel of a traditional capacitive touchscreen, achieving an integrated design of the electromagnetic induction coil and capacitive sensing electrode through circuit optimization. Although structurally sharing the same sensor, the electromagnetic and capacitive signals are still transmitted through independent physical channels, ensuring that the two touch modes do not interfere with each other. This solution is currently mainly used in small-sized panel displays under 11.2 inches, as the electromagnetic coil channel resistance of small-sized panels can be controlled within 3KΩ, meeting the requirements of high-precision electromagnetic pen input. However, the application of this technology in laptop touchscreens faces some challenges: firstly, the coil resistance of large-sized panels with narrow bezel designs reaches as high as 5KΩ, exceeding the 3KΩ limit of electromagnetic pens; secondly, the thin and light design limits the space for coil optimization, leading to a worsening of the resistance problem; and thirdly, large screens experience more severe capacitive noise interference, affecting touch stability. Therefore, this technology cannot be applied to electromagnetic touch display panels for laptops larger than 12 inches.

[0004] To address the aforementioned issue of coil channel resistance, the industry has proposed a new integrated magnetic mutual control solution, such as... Figure 2 As shown, this solution extends the capacitive sensing channel from both ends and connects it to the driver IC pins. The electromagnetic induction coil circuit is controlled by the internal circuit of the driver IC. Although this solution can meet the requirement that the coil resistance is less than 3KΩ, the fact that all channels need to be extended from the beginning and end of the capacitive sensing channel will result in an excessively wide bezel of the touch sensor. Since laptops usually have a high requirement for narrow bezels, this solution has not been used on laptop electromagnetic touch display panels.

[0005] Therefore, a more suitable magnetic interconnection technology solution is urgently needed for large-size touch devices. Summary of the Invention

[0006] The present invention aims to solve at least one problem in the prior art. To this end, the present invention proposes an electromagnetic touch display panel and an electronic device that, while maintaining low channel resistance, solves the problem of the influence of the channel end leads on the bezel width, enabling the integrated electromagnetic touch solution to be applied to large-size electronic devices such as laptops.

[0007] An electromagnetic touch display panel according to a first aspect of the present invention includes a sensing display area and a bonding area, the bonding area being disposed on one edge of the sensing display area, the sensing display area including:

[0008] The first electrode layer includes a plurality of first electrodes extending in a horizontal direction. A first metal lead is led out from each end of the first electrode, and the first metal leads on both sides are guided to the bonding area along the two side edges of the sensing display area.

[0009] The second electrode layer includes a plurality of second electrodes extending vertically. A second metal lead is led out from one end of the second electrode near the bonding region and is guided to the bonding region. A metal connecting line is led out from one end of the second electrode away from the bonding region and connects the ends of two non-adjacent second electrodes away from the bonding region.

[0010] An insulating layer is disposed between the first electrode layer and the second electrode layer. The insulating layer has openings at the intersections of the multiple metal connecting wires, and the metal connecting wires avoid direct overlap between the multiple metal connecting wires by means of jump holes.

[0011] As can be seen, this solution connects the two second electrodes via a metal connecting wire at the end of the second electrode away from the bonding area, enabling the integration of both touch and electromagnetic induction input methods. At the same time, it reduces the area of ​​the metal lead routing around the sensing display area by only needing to lead a second metal lead from one end of each second electrode to the bonding area. This allows the electromagnetic touch display panel of this solution to be applied to large-size electronic devices, expanding its application scenarios.

[0012] According to another embodiment of the present invention, the other ends of the two metal connecting lines drawn from two adjacent second electrodes are respectively connected to two other non-adjacent second electrodes.

[0013] According to another embodiment of the present invention, the width of the metal connecting wire is greater than the width of the first metal lead and / or the second metal lead.

[0014] According to another embodiment of the present invention, the width of the first electrode and / or the second electrode is 2-8 mm.

[0015] According to another embodiment of the present invention, the distance between two adjacent first electrodes and / or second electrodes is 3-9 mm.

[0016] According to another embodiment of the present invention, a peripheral ground wire is provided at the edge of the sensing display area, and the peripheral ground wire is disposed around the first metal lead, the second metal lead and the metal connecting line.

[0017] According to another embodiment of the present invention, a break is provided in the middle of the peripheral ground wire.

[0018] According to another embodiment of the present invention, the bonding area is provided with an isolation ground wire, which is disposed between the first metal lead and the second metal lead.

[0019] According to another embodiment of the present invention, the width of the isolation ground wire is greater than twice the width of the first metal lead or the second metal lead.

[0020] An electronic device according to a second aspect of the present invention includes any of the electromagnetic touch display panels described above.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] This invention discloses an electromagnetic touch display panel, including a sensing display area and a bonding area. The bonding area is disposed on one edge of the sensing display area. The sensing display area includes a first electrode layer, a second electrode layer, and an insulating layer. The first electrode layer includes multiple first electrodes extending horizontally, with a first metal lead extending from each end of the first electrode. The first metal leads on both sides are guided to the bonding area along the two edges of the sensing display area. The second electrode layer includes multiple second electrodes extending vertically. A second metal lead extends from the end of the second electrode near the bonding area and is guided to the bonding area. A metal connecting line extends from the end of the second electrode away from the bonding area, connecting the ends of two non-adjacent second electrodes away from the bonding area. The insulating layer is disposed between the first electrode layer and the second electrode layer. The insulating layer has openings at the intersections of the multiple metal connecting lines, and the metal connecting lines avoid direct overlap between the multiple metal connecting lines by using jumpers. As can be seen, this solution connects the two second electrodes via a metal connecting wire at the end of the second electrode away from the bonding area, enabling the integration of both touch and electromagnetic induction input methods. At the same time, it reduces the area of ​​the metal lead routing around the sensing display area by only needing to lead a second metal lead from one end of each second electrode to the bonding area. This allows the electromagnetic touch display panel of this solution to be applied to large-size electronic devices, expanding its application scenarios.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0025] Figure 1 This is a schematic diagram of an embodiment of an electromagnetic touch display panel in the prior art;

[0026] Figure 2 This is a schematic diagram of another embodiment of an electromagnetic touch display panel in the prior art;

[0027] Figure 3 A schematic diagram of an embodiment of the electromagnetic touch display panel provided in this application;

[0028] Figure 4 A schematic diagram of another embodiment of the electromagnetic touch display panel provided in this application;

[0029] Figure 5 A schematic diagram of an embodiment of the insulating layer of the electromagnetic touch display panel provided in this application;

[0030] Figure 6 A schematic diagram of an embodiment of the electronic device provided in this application;

[0031] The markings in the diagram mean:

[0032] 10. Electronic devices;

[0033] 100. Electromagnetic touch display panel;

[0034] 101. Sensing display area; 102. Bonding area; 1021. Touch pin;

[0035] 110. First electrode layer; 111. First electrode; 112. First metal lead;

[0036] 120. Second electrode layer; 121. Second electrode; 122. Second metal lead;

[0037] 123. Metal connecting wire;

[0038] 130. Insulation layer;

[0039] 140. Outer ground wire;

[0040] 150. Isolation ground wire. Detailed Implementation

[0041] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0042] In the description of this invention, it should be understood that features specified as "first" or "second" may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] To illustrate the electromagnetic touch display panel and electronic device provided in this application, the following detailed description is provided in conjunction with the accompanying drawings and textual descriptions of the embodiments.

[0045] The following is for reference. Figures 3-5 An electromagnetic touch display panel 100 according to an embodiment of the first aspect of the present invention is described, such as Figure 3 and Figure 4 As shown, the electromagnetic touch display panel 100 includes a sensing display area 101 and a bonding area 102. The bonding area 102 is disposed on one edge of the sensing display area 101, that is, the bonding area 102 is disposed around the periphery of the sensing display area 101. Specifically, the bonding area 102 is provided with touch pins 1021, and the touch pins 1021 are bonded to the connection terminals of the driver chip (not shown in the figure). Specifically, the sensing display area 101 includes a first electrode layer 110, a second electrode layer 120 and an insulating layer 130.

[0046] Furthermore, the first electrode layer 110 includes a plurality of first electrodes 111 extending in a horizontal direction. A first metal lead 112 is led out from the left and right ends of the first electrode 111, and the plurality of first metal leads 112 on both sides are guided along the two side edges of the sensing display area 101 to the bonding area 102 and connected to the touch pin 1021.

[0047] Furthermore, the second electrode layer 120 includes multiple second electrodes 121 extending vertically. A second metal lead 122 is led out from the end of the second electrode 121 near the bonding area 102. The multiple second metal leads 122 are respectively guided to the bonding area 102 and connected to the touch pin 1021. A metal connecting line 123 is led out from the end of the second electrode 121 away from the bonding area 102. The metal connecting line 123 connects the ends of two non-adjacent second electrodes 121 away from the bonding area 102. It can be understood that the two non-adjacent second electrodes 121 are connected by the metal connecting line 123, thereby forming an electromagnetic coil circuit together with the metal connecting line 123 and the second metal lead 122. At the same time, the first electrode 111 also forms another layer of electromagnetic coil circuit through the first metal leads 112 led out from the left and right ends. Therefore, the two layers of electromagnetic coil circuits can achieve the effect of electromagnetic touch.

[0048] Furthermore, such as Figure 5The insulating layer 130 shown is disposed between the first electrode layer 110 and the second electrode layer 120. The insulating layer 130 has openings (not shown in the figure) at the intersection of multiple metal connecting lines 123. The metal connecting lines 123 avoid direct overlap between multiple metal connecting lines 123 by means of jump holes. It can be understood that since there are a large number of metal connecting lines 123 leading from multiple second electrodes 121, in order to avoid short circuits caused by direct overlap between multiple metal connecting lines 123, it is necessary to set openings on the insulating layer 130 at the overlap position of two metal connecting lines 123. One metal connecting line 123 jumps to the first electrode layer 110 by means of jump holes, and another opening is set at another position on the insulating layer 130. The metal connecting line 123 that jumped to the first electrode layer 110 jumps back to the second electrode layer 120 through the opening and connects to another second electrode 121. It can be understood that by setting multiple openings on the insulating layer 130, the metal connecting lines 123 can achieve connection between two second electrodes 121.

[0049] It should be noted that the two second electrodes 121 connected by the metal connecting wire 123 are not adjacent, thus enabling accurate identification of the sensing position during capacitive touch sensing.

[0050] It should be noted that the specific locations of the multiple openings on the insulating layer 130 can be determined according to the specific arrangement of the metal connecting wire 123, and are not specifically limited here.

[0051] Therefore, the electromagnetic touch display panel 100 of this embodiment connects two second electrodes 121 via a metal connecting line 123 at the end of the second electrode 121 away from the bonding area 102, thereby integrating touch and electromagnetic induction input methods simultaneously. At the same time, it reduces the area of ​​the metal lead wiring around the sensing display area 101 by only needing to lead a second metal lead 122 from one end of each second electrode 121 to the bonding area 102. This allows the electromagnetic touch display panel 100 of this solution to achieve a narrow bezel, and thus can be applied to large-size electronic devices 10, expanding the application scenarios.

[0052] According to one embodiment of the present invention, such as Figure 3 and Figure 4As shown, the other ends of the two metal connecting lines 123 leading from two adjacent second electrodes 121 are respectively connected to two other non-adjacent second electrodes 121. That is to say, only one end of any two metal connecting lines 123 is connected to an adjacent second electrode 121, and the other ends of these two metal connecting lines 123 are connected to non-adjacent second electrodes 121. It can be understood that by setting the metal connecting lines 123 in this way, the combination of any two adjacent second electrodes 121 can be unique. That is, the metal connecting lines 123 leading from any two adjacent second electrodes 121 will not be connected to two other adjacent second electrodes 121. This ensures that the channel signals generated during capacitive touch are all unique signals, thereby enabling accurate identification of the sensing position during capacitive touch sensing.

[0053] It should be noted that there are multiple ways to connect the other ends of the two metal connecting lines 123 leading out from the two adjacent second electrodes 121 to two other non-adjacent second electrodes 121, as long as the channel signals caused by capacitive touch are all unique signals. There are no specific limitations on the way the metal connecting lines 123 are connected to the second electrodes 121.

[0054] According to one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the width of the metal connection line 123 is greater than the width of the first metal lead 112 and / or the second metal lead 122. It can be understood that since the metal connection line 123 is farther from the bonding area 102 than the first metal lead 112 and the second metal lead 122, according to the resistance formula R = ρ·L / A (ρ is resistivity, L is length, and A is cross-sectional area), the resistance is proportional to the length. Therefore, the resistance of a long-distance trace is greater. Thus, in order to reduce the resistance of the metal connection line 123, the width of the metal connection line 123 is set to be greater than the width of the first metal lead 112 and / or the second metal lead 122, so that the resistance of the metal traces in different areas tends to be more consistent.

[0055] It should be noted that the widths of the metal connecting line 123, the first metal lead 112, and the second metal lead 122 need to be determined according to different application scenarios. As long as the widths of the metal connecting line 123, the first metal lead 112, and the second metal lead 122 are adjusted to make the resistance of the metal traces in different areas tend to be consistent, no specific limit is made on the widths of the metal connecting line 123, the first metal lead 112, and the second metal lead 122 here.

[0056] According to one embodiment of the present invention, such as Figure 3 and Figure 4As shown, the width of the first electrode 111 and / or the second electrode 121 is 2-8mm. It is understood that if the width of the first electrode 111 and the second electrode 121 is too large, it will cause a decrease in touch sensitivity, a weakening of the edge electric field, an increase in the light-blocking area, a decrease in light transmittance, and a reduction in the accuracy of multi-finger touch. At the same time, if the width of the first electrode 111 and the second electrode 121 is too small, it will cause an increase in resistance, a weakening of anti-interference ability, and accidental touches. Therefore, the width of the first electrode 111 and / or the second electrode 121 needs to be set to 2-8mm to balance resistance, touch sensitivity, and light transmittance.

[0057] According to one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the distance between two adjacent first electrodes 111 and / or second electrodes 121 is 3-9mm. It is understood that if the pitch between adjacent first electrodes 111 and second electrodes 121 is too large, it will cause problems such as decreased touch sensitivity, edge touch failure, and weakened anti-interference ability. At the same time, if the pitch between adjacent first electrodes 111 and second electrodes 121 is too small, it will cause problems such as increased signal crosstalk, increased manufacturing difficulty and cost. Therefore, the pitch between the first electrodes 111 and / or second electrodes 121 is set to 3-9mm to balance touch sensitivity, anti-interference ability and manufacturing process.

[0058] According to one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, an outer ground wire 140 is provided at the edge of the sensing display area 101. The outer ground wire 140 is located around the first metal lead 112, the second metal lead 122 and the metal connecting wire 123, thereby shielding external electromagnetic interference and suppressing edge electric field interference.

[0059] According to one embodiment of the present invention, such as Figure 4 As shown, a break is provided in the middle of the outer ground wire 140. It can be understood that by providing a break in the middle of the outer ground wire 140, electrostatic discharge (ESD) protection can be provided.

[0060] According to one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the bonding area 102 is provided with an isolation ground wire 150, which is located between the first metal lead 112 and the second metal lead 122. It can be understood that the first metal lead 112 and the second metal lead 122 are arranged relatively densely, and adjacent traces may generate crosstalk through parasitic capacitance or inductive coupling. Therefore, the isolation ground wire 150 can isolate the first metal lead 112 and the second metal lead 122, reducing the risk of crosstalk.

[0061] According to one embodiment of the present invention, such as Figure 3 and Figure 4 As shown, the width of the isolation ground wire 150 is more than twice the width of the first metal lead 112 or the second metal lead 122. It can be understood that by setting the width of the isolation ground wire 150 to be larger than the width of the first metal lead 112 or the second metal lead 122, its anti-interference capability can be improved, crosstalk and parasitic effects can be reduced, and its own impedance can also be reduced.

[0062] The following is for reference. Figure 6 An electronic device 10 according to an embodiment of a second aspect of the present invention is described, such as... Figure 6 As shown, the electromagnetic touch display panel 100, including any of the above, connects two second electrodes 121 via a metal connecting line 123 at the end of the second electrode 121 away from the bonding area 102. This enables the integration of both touch and electromagnetic induction input methods. At the same time, it allows each second electrode 121 to only need to have a second metal lead 122 led from one end to the bonding area 102, thereby reducing the area of ​​the metal lead wiring around the sensing display area 101. This allows the electromagnetic touch display panel 100 of this solution to achieve a narrow bezel, which can then be applied to large-size electronic devices 10, expanding the application scenarios.

[0063] It should be noted that electronic device 10 can be a laptop, smart conference tablet, smart blackboard, smart home control console, and medical product control console, etc.

[0064] The electromagnetic touch display panel and electronic device provided in this application are preferred embodiments and should not be construed as limiting the scope of protection of this application. Those skilled in the art should know that various improvements or substitutions can be made without departing from the concept of this application, and all improvements or substitutions should be within the scope of protection of this application, that is, the scope of protection of this application should be determined by the claims.

[0065] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

Claims

1. An electromagnetic touch display panel, characterized in that, The sensing display area includes a sensing display area and a bonding area, wherein the bonding area is disposed on one edge of the sensing display area, and the sensing display area includes: The first electrode layer includes a plurality of first electrodes extending in a horizontal direction. A first metal lead is led out from each end of the first electrode, and the first metal leads on both sides are guided to the bonding area along the two side edges of the sensing display area. The second electrode layer includes a plurality of second electrodes extending vertically. A second metal lead is led out from one end of the second electrode near the bonding region and is guided to the bonding region. A metal connecting line is led out from one end of the second electrode away from the bonding region and connects the ends of two non-adjacent second electrodes away from the bonding region. An insulating layer is disposed between the first electrode layer and the second electrode layer. The insulating layer has openings at the intersections of the multiple metal connecting wires, and the metal connecting wires avoid direct overlap between the multiple metal connecting wires by means of jump holes.

2. The electromagnetic touch display panel as described in claim 1, characterized in that, The other ends of the two metal connecting lines drawn from the two adjacent second electrodes are respectively connected to two other non-adjacent second electrodes.

3. The electromagnetic touch display panel as described in claim 1, characterized in that, The width of the metal connecting wire is greater than the width of the first metal lead and / or the second metal lead.

4. The electromagnetic touch display panel as described in claim 1, characterized in that, The width of the first electrode and / or the second electrode is 2-8 mm.

5. The electromagnetic touch display panel as described in claim 1, characterized in that, The distance between two adjacent first electrodes and / or second electrodes is 3-9 mm.

6. The electromagnetic touch display panel as described in claim 1, characterized in that, A peripheral ground wire is provided at the edge of the sensing display area, and the peripheral ground wire is located around the first metal lead, the second metal lead and the metal connecting wire.

7. The electromagnetic touch display panel as described in claim 6, characterized in that, The outer ground wire has a break in the middle.

8. The electromagnetic touch display panel as described in claim 1, characterized in that, The bonding area is provided with an isolation ground wire, which is located between the first metal lead and the second metal lead.

9. The electromagnetic touch display panel as described in claim 8, characterized in that, The width of the isolation ground wire is greater than twice the width of the first metal lead or the second metal lead.

10. An electronic device, characterized in that, Includes the electromagnetic touch display panel as described in any one of claims 1-9.

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