Display device, touch display panel and manufacturing method thereof, touch panel

Abstract

The present disclosure relates to a display device, a touch display panel and a manufacturing method thereof, and a touch panel, and relates to the field of display technologies. The touch panel includes a touch layer provided on one side of a display substrate having a display area and a peripheral area. The touch layer includes touch electrodes at least partially located in the display area and peripheral traces located in the peripheral area; the touch electrodes include a first touch electrode and a second touch electrode; the peripheral traces include a first trace, a second trace, a first shielding line and a second shielding line; the first shielding line is provided outside the first trace, the second trace is provided outside the first shielding line, and the second shielding line is provided outside the second trace; at least a partial region of the width of the gap between the first shielding line and the first trace is a first pitch, at least a partial region of the width of the gap between the second trace and the first shielding line is a second pitch, and at least a partial region of the width of the gap between the second shielding line and the second trace is a third pitch; the third pitch is greater than the first pitch and greater than the second pitch.

Description

Technical Field

[0001] The present disclosure relates to the field of touch technologies, and in particular, to a display device, a touch display panel, a manufacturing method of the touch display panel, and a touch panel. Background Art

[0002] Touch display panels have been widely used in terminal devices such as mobile phones, wearable devices, and tablet computers for touch operations to achieve human-computer interaction. Currently, during the use of touch display panels, touch failures or even failures are likely to occur.

[0003] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0004] An object of the present disclosure is to overcome the deficiencies of the above prior art and provide a display device, a touch display panel, a manufacturing method of the touch display panel, and a touch panel.

[0005] According to one aspect of the present disclosure, a touch panel is provided, including:

[0006] A touch layer disposed on one side of a display substrate, the display substrate having a display area and a peripheral area outside the display area; the touch layer includes touch electrodes and peripheral traces, at least part of the touch electrodes are located in the display area, and the peripheral traces are located in the peripheral area; the touch electrodes include a first touch electrode and a second touch electrode; the peripheral traces include a first trace, a second trace, a first shield line, and a second shield line; the first trace is disposed outside the display area and connected to the first touch electrode, the first shield line is disposed outside the first trace, the second trace is disposed outside the first shield line and connected to the second touch electrode, and the second shield line is disposed outside the second trace;

[0007] The width of at least a partial area of the gap between the first shield line and the first trace is a first spacing, the width of at least a partial area of the gap between the second trace and the first shield line is a second spacing, and the width of at least a partial area of the gap between the second shield line and the second trace is a third spacing; <*

[0008] The third spacing is greater than the first spacing and greater than the second spacing.

[0009] In an exemplary embodiment of the present disclosure, the first spacing is greater than the second spacing.

[0010] In an exemplary embodiment of the present disclosure, the third spacing is less than twice the first spacing and less than twice the second spacing.

[0011] In an exemplary embodiment of the present disclosure, the display area includes a bonding area;

[0012] The first trace, the second trace, the first shielding line, and the second shielding line each include a main body portion and an extending portion. The main body portion is located within the display area and outside the bonding area, and the extending portion extends into the bonding area;

[0013] The width of the gap between the first shielding line and the main body portion of the first trace is the first spacing; the width of the gap between the first shielding line and the main body portion of the second trace is the second spacing; the width of the gap between the second shielding line and the main body portion of the second trace is the third spacing;

[0014] The width of at least a portion of the gap between the first shielding line and the extending portion of the first trace is the fourth spacing; the width of at least a portion of the gap between the first shielding line and the extending portion of the second trace is the fifth spacing; the width of at least a portion of the gap between the second shielding line and the extending portion of the second trace is the sixth spacing;

[0015] The sixth spacing is greater than the fourth spacing and greater than the fifth spacing;

[0016] The sixth spacing is greater than the third spacing, the fifth spacing is greater than the second spacing, and the fourth spacing is greater than the first spacing.

[0017] In an exemplary embodiment of the present disclosure, the fourth spacing is greater than the fifth spacing.

[0018] In an exemplary embodiment of the present disclosure, the display area includes a bonding area;

[0019] The first trace, the second trace, the first shielding line, and the second shielding line each include a main body portion and an extending portion. The main body portion is located within the display area and outside the bonding area, and the extending portion extends into the bonding area;

[0020] The width of the gap between the first shielding line and the main body portion of the first trace is the first spacing; the width of the gap between the first shielding line and the main body portion of the second trace is the second spacing; the width of the gap between the second shielding line and the main body portion of the second trace is the third spacing;

[0021] The width of at least a portion of the gap between the first shielding line and the extension of the first routing line is a fourth spacing; the width of at least a portion of the gap between the first shielding line and the extension of the second routing line is a fifth spacing; and the width of at least a portion of the gap between the second shielding line and the extension of the second routing line is a sixth spacing.

[0022] The fourth interval, the fifth interval, and the sixth interval are the same.

[0023] In an exemplary embodiment of the present disclosure, the width of any one of the main body portions is smaller than the width of the extension portion to which it is connected; and the widths of the extension portions are the same.

[0024] In an exemplary embodiment of the present disclosure, the touch layer includes:

[0025] A conductive layer comprising an electrode region and a wiring region; the electrode region is at least partially located in the display region, the electrode region comprising a plurality of second touch electrodes extending along a first direction and spaced apart along a second direction, and a plurality of electrode unit groups extending along the second direction and distributed along the first direction, each of the electrode unit groups comprising a plurality of electrode units distributed along the second direction; the wiring region is located in the peripheral region, and the wiring region comprises the peripheral wiring; the first direction intersects with the second direction;

[0026] a first insulating layer, covering a surface of the conductive layer facing away from the display substrate;

[0027] A connecting layer is provided on the surface of the first insulating layer facing away from the display substrate; the connecting layer includes a plurality of connecting units; in the second direction, two adjacent electrode units are connected by a connecting unit; any first touch electrode includes a column of the connecting units and the electrode units connected thereto.

[0028] In an exemplary embodiment of the present disclosure, the touch panel further includes:

[0029] a hardening layer covering one side of the display substrate;

[0030] The shadow elimination layer is provided on the surface of the hardening layer away from the display substrate; and the touch control layer is provided on the surface of the shadow elimination layer away from the display substrate.

[0031] In an exemplary embodiment of the present disclosure, the conductive layer and the connecting layer are both made of transparent conductive materials.

[0032] In an exemplary embodiment of the present disclosure, the material of the peripheral trace includes metallic silver.

[0033] In an exemplary embodiment of the present disclosure, the touch panel further includes:

[0034] a second insulating layer, covering the connection layer and a surface of the first insulating layer facing away from the substrate;

[0035] The polarizing layer is provided on the surface of the second insulating layer facing away from the substrate; the polarizing layer is provided with an opening, and the binding area is located within the orthographic projection of the opening on the display substrate.

[0036] According to one aspect of the present disclosure, a touch display panel is provided, comprising:

[0037] A display substrate having a display area and a peripheral area located outside the display area;

[0038] Any of the above touch panels is provided on one side of the display substrate.

[0039] According to one aspect of the present disclosure, a method for manufacturing a touch display panel is provided, comprising:

[0040] A display substrate is formed, wherein the display substrate has a display area and a peripheral area outside the display area

[0041] A touch layer is formed on one side of the display substrate, the touch layer including touch electrodes and peripheral wiring, the touch electrodes being at least partially located in the display area, and the peripheral wiring being located in the peripheral area; the touch electrodes including a first touch electrode and a second touch electrode; the peripheral wiring including a first wiring, a second wiring, a first shielding wire, and a second shielding wire; the first wiring being located outside the display area and connected to the first touch electrode, the first shielding wire being located outside the first wiring, the second wiring being located outside the first shielding wire and connected to the second touch electrode, and the second shielding wire being located outside the second wiring;

[0042] The width of at least a portion of the gap between the first shielding line and the first routing line is a first spacing, the width of at least a portion of the gap between the second routing line and the first shielding line is a second spacing, and the width of at least a portion of the gap between the second shielding line and the second routing line is a third spacing;

[0043] The third interval is greater than the first interval and greater than the second interval.

[0044] According to one aspect of the present disclosure, a display device is provided, comprising any one of the touch display panels described above.

[0045] The present disclosure relates to a display device, a touch display panel and a manufacturing method thereof, and a touch panel. The first trace, the second trace, the first shielding line and the second shielding line are all disposed in a peripheral area outside the display area, and are sequentially distributed outward in a direction away from the display area, such that the second shielding line is closest to the edge of the display substrate. At the same time, the third spacing is greater than the first spacing and greater than the second spacing. That is to say, the spacing of at least part of the gap between the second shielding line and the second trace is greater than the spacing of at least part of the gap between the first shielding line and the first trace, and greater than the spacing of at least part of the gap between the first shielding line and the second trace, so that the second shielding line is not likely to undergo metal electro-chemical migration towards the second trace, thereby reducing the risk of circuit failure caused by metal electro-chemical migration and ensuring normal touch function.

[0046] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure, and are used together with the specification to explain the principles of the present disclosure. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and those of ordinary skill in the art can obtain other drawings without creative efforts based on these drawings.

[0048] Figure 1 It is a schematic diagram of an embodiment of the touch display panel of the present disclosure.

[0049] Figure 2 is Figure 1 a partial schematic diagram of an embodiment of the touch panel in

[0050] Figure 3 is Figure 1 the AA cross-sectional view of

[0051] Figure 4 It is a partial cross-sectional view of an embodiment of the touch display panel of the present disclosure.

[0052] DESCRIPTION OF REFERENCE NUMERALS:

[0053] 1. Display substrate; 101. Display area; 102. Peripheral area; 1021. Bonding area; 2. Touch layer; 21. Touch electrodes; 211. First touch electrode; 2111. Electrode unit; 2112. Connection unit; 212. Second touch electrode; 22. Peripheral traces; 221. First trace; 2211. First sub-trace; 222. Second trace; 2221. Second sub-trace; 223. First shielding line; 224. Second shielding line; 2241. First line body; 2242. Second line body; 001. Conductive layer; 002. First insulating layer; 003. Connection layer; 201. Main body part; 202. Extension part; 3. Hardening layer; 4. Shadow elimination layer; 5. Second insulating layer; 6. Polarizing layer; 61. Opening. Detailed implementation manners

[0054] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. Like reference numerals in the figures denote like or similar structures, and thus their detailed descriptions will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0055] The terms "a", "an", "the", "said" and "at least one" are used to denote the existence of one or more elements / components / etc.; the terms "comprising" and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc.; the terms "first", "second", "third", etc. are only used as labels and are not a limitation on the quantity of their objects.

[0056] The first direction and the second direction only refer to two intersecting directions. For example, the first direction and the second direction are perpendicular, but it is not limited that the first direction must be the horizontal direction in the drawings, and the second direction is not limited to the vertical direction in the drawings. Those skilled in the art can know that if the touch panel is rotated, the actual orientations of the first direction and the second direction will change accordingly.

[0057] An embodiment of the present disclosure provides a touch panel, which can be used for a touch display panel. The touch display panel can be an OLED touch display panel. Further, the OLED (Organic Light-Emitting Diode) display panel can be a flexible display panel.

[0058] As Figures 1-3 shown, the touch panel of the embodiment of the present disclosure may include a touch layer 2, wherein:

[0059] The touch layer 2 is disposed on one side of the display substrate 1. The display substrate 1 has a display area 101 and a peripheral area 102 located outside the display area 101. The touch layer 2 includes touch electrodes 21 and peripheral traces 22. The touch electrodes 21 are at least partially located in the display area 101, and the peripheral traces 22 are located in the peripheral area 102. The touch electrodes 21 include a first touch electrode 211 and a second touch electrode 212. The peripheral traces 22 include a first trace 221, a second trace 222, a first shield line 223, and a second shield line 224. The first trace 221 is disposed outside the display area 101 and is connected to the first touch electrode 211. The first shield line 223 is disposed outside the first trace 221. The second trace 222 is disposed outside the first shield line 223 and is connected to the second touch electrode 212. The second shield line 224 is disposed outside the second trace 222.

[0060] The width of at least a partial region of the gap between the first shield line 223 and the first trace 221 is a first pitch. The width of at least a partial region of the gap between the second trace 222 and the first shield line 223 is a second pitch. The width of at least a partial region of the gap between the second shield line 224 and the second trace 222 is a third pitch.

[0061] The third pitch is greater than the first pitch and greater than the second pitch.

[0062] In the touch display panel according to the embodiment of the present disclosure, the first trace 221, the second trace 222, the first shield line 223, and the second shield line 224 are all disposed outside the display area 101 and are sequentially distributed outward in a direction away from the display area 101, such that the second shield line 224 is closest to the edge of the display substrate 1. At the same time, the third pitch is greater than the first pitch and greater than the second pitch. That is to say, the pitch of at least a partial region of the gap between the second shield line 224 and the second trace 222 is greater than the pitch of at least a partial region of the gap between the first shield line 223 and the first trace 221, and greater than the pitch of at least a partial region of the gap between the first shield line 223 and the second trace 222, making it difficult for the second shield line 224 to undergo metal electrochemical migration towards the second trace 222, thereby reducing the risk of circuit failure caused by metal electrochemical migration and ensuring normal touch function.

[0063] The following will describe each part of the touch panel according to the embodiment of the present disclosure in detail:

[0064] As Figures 1-3 shown, the display substrate 1 can be used for emitting light to display an image. It can be an OLED display substrate as long as it can display an image. At the same time, according to whether it can emit light, the display substrate 1 can be at least divided into a display area 101 and a peripheral area 102. The display area 101 can emit light and is used for displaying an image. The peripheral area 102 is located outside the display area 101. It can surround the display area 101 and is used for setting external circuits and can be bonded to an external driving circuit board.

[0065] Taking the OLED display substrate as an example, the display substrate 1 has a plurality of light-emitting devices that can emit light. The light-emitting devices are controlled to emit light through the peripheral circuit and the pixel circuit to achieve image display. Specifically: The display substrate 1 may include a substrate, a driving circuit layer, and a light-emitting device layer, where:

[0066] The substrate may be a flexible material such as PI (polyimide) to form a flexible display substrate 1. Of course, the substrate may be a hard material such as glass, and no special limitation is made here.

[0067] The driving circuit layer is disposed on one side of the substrate and includes a pixel circuit and a peripheral circuit, where: The pixel circuit is located in the display area 101, and it may be a pixel circuit such as 7T1C, 7T2C, 6T1C, or 6T2C. As long as it can drive the light-emitting device to emit light, no special limitation is made on its structure here. The number of pixel circuits is the same as the number of light-emitting devices, and they are connected to each light-emitting device one by one to control the light emission of each light-emitting device respectively. Among them, nTmC means that a pixel circuit includes n transistors (represented by the letter "T") and m capacitors (represented by the letter "C").

[0068] The peripheral circuit is located in the peripheral area 102, and the peripheral circuit is connected to the pixel circuit to input a driving signal to the pixel circuit to control the light emission of the light-emitting device. The peripheral circuit may include a gate driving circuit and a light-emitting control circuit. Of course, it may also include other circuits, and no special limitation is made on the specific structure of the peripheral circuit here.

[0069] The light-emitting device layer is disposed on the surface of the driving circuit layer facing away from the substrate and includes a plurality of light-emitting devices distributed in an array. The light-emitting device may be an OLED light-emitting device. For example, each light-emitting device may include a first electrode, a light-emitting layer, and a second electrode stacked in sequence in the direction away from the substrate. The light-emitting layer may include a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer stacked in sequence in the direction away from the substrate. In addition, in order to facilitate defining the range of each light-emitting device, the light-emitting device layer may further include a pixel definition layer, which may be disposed on the surface of the driving circuit layer facing away from the substrate and is provided with a plurality of through holes that respectively expose the first electrodes. At least part of each light-emitting layer is disposed in each through hole, so as to define each light-emitting device through the through holes, and each light-emitting device may share the same second electrode.

[0070] In addition, the display substrate 1 may further include a packaging layer, which may cover the surface of the light-emitting device layer facing away from the substrate to protect the light-emitting device. The packaging layer may be a multi-layer structure. For example, the packaging layer may include two inorganic layers and an organic layer coated between the inorganic layers.

[0071] Such as Figures 1-3As shown, the touch layer 2 can be disposed on one side of the display substrate 1 for sensing touch operations. For example, the touch panel may further include a hardening layer 3 and a shadow elimination layer 4, that is, an IM (INDEX MARGIN) layer. The hardening layer 3 can cover one side of the display substrate 1. For example, it is disposed on the surface of the encapsulation layer facing away from the substrate. The shadow elimination layer 4 can be disposed on the surface of the hardening layer 3 facing away from the display substrate 1. The materials of the hardening layer 3 and the shadow elimination layer 4 can both include resin.

[0072] The touch layer 2 can include touch electrodes 21 and peripheral traces 22. At least a part of the touch electrodes 21 is located within the display area 101, that is, at least a part of the orthographic projection of the touch electrodes 21 on the display substrate 1 is located within the display area 101. The peripheral traces 22 are located within the peripheral area 102, that is, the orthographic projection of the peripheral traces 22 on the display substrate 1 is located within the peripheral area 102, and the peripheral traces 22 surround the display area 101. A driving signal can be input to the touch electrodes 21 through the peripheral traces 22, and the sensing signals of the touch electrodes 21 can be received, so as to determine the touch position according to the received signals and implement touch operations.

[0073] Taking the touch layer 2 adopting a mutual capacitance touch structure as an example, as Figures 1-3 shown, the touch electrodes 21 can include a first touch electrode 211 and a second touch electrode 212. The first touch electrode 211 and the second touch electrode 212 can be cross-distributed in space along a first direction and a second direction perpendicular to each other, so that the touch position can be determined by sensing the capacitance change between the first touch electrode 211 and the second touch electrode 212.

[0074] As Figures 1-3 shown, in order to prevent the first touch electrode 211 and the second touch electrode 212 from short-circuiting, the touch layer 2 can include a conductive layer 001, a first insulating layer 002, and a connection layer 003, where:

[0075] The conductive layer 001 can be disposed on one side of the display substrate 1. For example, it is disposed on the surface of the shadow elimination layer 4 facing away from the display substrate 1. The conductive layer 001 can include an electrode area located within the display area 101 and a trace area located within the peripheral area 102. The electrode area can include a plurality of second touch electrodes 212. The second touch electrodes 212 can extend along the first direction and be spaced apart along the second direction. At the same time, the electrode area further includes a plurality of electrode unit groups. Each electrode unit group extends along the second direction and is distributed along the first direction. Each electrode unit group includes a plurality of electrode units 2111 distributed along the second direction. A row of electrode units 2111 distributed along the first direction is provided between two adjacent second touch electrodes 212. The material of the trace area can be a transparent conductive material, such as ITO (indium tin oxide), etc. For example, the first direction is as Figure 1 shown by the X direction in Figure 1 and the second direction is as

[0076] The wiring area of the conductive layer 001 is the peripheral wiring 22, and its material can be an alloy. For example, the material of the wiring area can be APC metal, which can include silver and can also include other metals such as palladium and copper. Of course, other metals can also be used for the wiring area.

[0077] The first insulating layer 002 covers the conductive layer 001 and can also cover the surface of the light-shielding layer 4 facing away from the display substrate 1. The first insulating layer 002 is made of a transparent insulating material, and its surface facing away from the display substrate 1 can be a flat surface.

[0078] The connection layer 003 is disposed on the surface of the first insulating layer 002 facing away from the display substrate 1. The connection layer 003 can include a plurality of connection units 2112. In the second direction, two adjacent electrode units 2111 are connected by a connection unit 2112. Any first touch electrode 211 includes a column of connection units 2112 and the electrode units 2111 connected thereto. The material of the connection layer 003 can be a transparent conductive material, such as ITO, etc.

[0079] It should be noted that the first touch electrode 211 and the second touch electrode 212 can be interchanged, that is, the first touch electrode 211 can also extend along the second direction and be distributed along the first direction; the second touch electrode 212 can also extend along the first direction and be distributed along the second direction. Figure 1 This is only an exemplary illustration and does not constitute a specific limitation on the directions and patterns of the first touch electrode 211 and the second touch electrode 212.

[0080] As Figures 1-3 shown, the peripheral wiring 22 can include a first wiring 221, a second wiring 222, a first shielding wire 223, and a second shielding wire 224, where:

[0081] The first wiring 221 is disposed outside the display area 101 and is connected to the first touch electrode 211 for transmitting signals to the first touch electrode 211. The first shielding wire 223 is disposed outside the first wiring 221; the second wiring 222 is disposed outside the first shielding wire 223 and is connected to the second touch electrode 212, and the second shielding wire 224 surrounds the second wiring 222.

[0082] The first shield line 223 is a Guard line. By applying an alternating current signal, such as a square wave signal, to the first shield line 223, it can shield signal interference and improve the signal-to-noise ratio. Taking the first trace 221 for transmitting a driving signal and the second trace 222 for transmitting an induction signal as an example, there is a coupling capacitance and a potential difference between the first trace 221 and the second trace 222. Due to the existence of the coupling capacitance, there will be a problem of charge escape on the first trace 221, which is manifested as a decrease in the signal-to-noise ratio. By setting the alternating current signal on the first shield line 223, the potential difference between the first trace 221 and the first shield line 223 can be made zero, thus preventing the driving signal from being distorted due to charge escape and reducing the signal-to-noise ratio, and playing a role in shielding interference.

[0083] The first shield line 223 and the first trace 221 are arranged at intervals, and the width of at least part of the gap between them is the first spacing d1. The second trace 222 and the first shield line 223 are arranged at intervals, and the width of at least part of the gap between them is the second spacing d2. The second shield line 224 and the second trace 222 are arranged at intervals, and the width of at least part of the gap between them is the third spacing d3.

[0084] Taking the material of the peripheral trace 22 as APC metal as an example, when electrochemical migration occurs, it is mainly the metal silver that migrates. According to the silver migration theory and experimental analysis, there is a voltage between any one of the first trace 221 and the second trace 222 and any one of the first shield line 223 and the second shield line 224, which causes metal electrochemical migration in the first shield line 223 and the second shield line 224. The anti-migration ability can be measured by the median life, then there is:

[0085]

[0086] Wherein, t50 is the median life (the time required for 50% cumulative failure), α is a proportionality constant; U is the voltage between the second shield line 224 and the second trace 222; D is the width of the gap between the shield line (the first shield line 223 or the second shield line 224) and the trace (the first trace 221 and the second trace 222); H is the humidity factor, ΔH is the activation energy required for silver migration, and the activation energy for silver migration is 1.15 ± 0.15 eV; k is the Boltzmann constant (8.617×10-5 eV / K), T is the absolute temperature (K); m, n, x are the test exponential coefficients of the touch display panel and can be determined in advance. In summary, it can be seen that the anti-silver migration ability is proportional to the width D of the gap between the shield line and the trace, inversely proportional to the humidity H, and inversely proportional to the potential difference U between the shield line and the trace.

[0087] According to the above analysis, since it is difficult to directly and accurately adjust the humidity H, and the potential of the shielded wire is usually fixed (grounded), and the potential of the electrical signal transmitted by the trace is also basically fixed, the potential difference U usually remains stable. Therefore, the width of the gap between the shielded wire and the trace has a greater impact on the ability to resist silver migration. At the same time, the second shielded wire 224 is closer to the edge of the touch display panel and is more likely to come into contact with external moisture, and the humidity at its location is relatively high. Therefore, the second shielded wire 224 is more likely to undergo metal electrochemical migration towards the second trace 222. Based on this, in the embodiments of the present disclosure, the third spacing d3 can be made greater than the first spacing d1 and greater than the second spacing d2, that is, d3>d2 and d3>d1. At least increase the width of the local area of the gap between the second shielded wire 224 and the second trace 222, so as to at least weaken or avoid the electrochemical migration of the low-potential (grounded) second shielded wire 224 towards the high-potential second trace 222 in the local area, thereby stabilizing the electrical performance of the shielded wire and the trace and reducing the risk of failure.

[0088] Further, as Figures 1-3 shown, in some embodiments of the present disclosure, when the touch display panel is working, the first touch electrode 211 can be used as a driving electrode and can transmit a driving signal between the first trace 221, and the second touch electrode 212 can be used as a sensing electrode and can transmit a sensing signal between the second trace 222. The potential of the driving signal is higher than the potential of the sensing signal, so that the potential difference between the first trace 221 and the first shielded wire 223 is greater than the potential difference between the second trace 222 and the first shielded wire 223. And the electrochemical migration of the same wire usually occurs in the direction of higher potential. Therefore, in order to further prevent the occurrence of metal electrochemical migration, the first spacing d1 can be made greater than the second spacing d2 to reduce the risk of metal electrochemical migration of the first shielded wire 223 towards the first trace 221.

[0089] Further, the third spacing d3 is less than twice the first spacing d1 and less than twice the second spacing d2, while reducing the risk of metal electrochemical migration, avoiding occupying too much space.

[0090] Of course, in other embodiments of the present disclosure, the first touch electrode 211 can be used as a sensing electrode and the second touch electrode 212 can be used as a driving electrode. Based on the principle that the first spacing d1 is greater than the second spacing d2 described above, the second spacing d2 can be made greater than the first spacing d1.

[0091] Further, as Figure 1 and Figure 3As shown, in some embodiments of the present disclosure, the peripheral area 102 of the display substrate 1 may include a bonding area 1021. The touch layer 2 may be provided with a plurality of bonding pads for connecting to an external driving circuit board in the area corresponding to the bonding area 1021. That is to say, the orthographic projection of the bonding pads on the display substrate 1 is located within the bonding area 1021. The peripheral traces 22 of the touch layer 2 and the peripheral circuit of the display substrate 1 are both connected to the bonding pads to receive and feedback signals.

[0092] The first trace 221, the second trace 222, the first shielding line 223, and the second shielding line 224 all include a main body portion 201 and an extension portion 202. The main body portion 201 is located within the peripheral area 102 and outside the bonding area 1021, that is, the projection of the main body portion 201 on the display substrate 1 is located within the peripheral area 102 and outside the bonding area 1021. The extension portion 202 is connected to the main body portion 201 and extends into the bonding area 1021. The main body portion 201 can be connected to the bonding pads through the extension portion 202.

[0093] The widths of the main body portion 201 and the extension portion 202 are not specifically limited herein. For example, for any trace, the width of the main body portion 201 is less than the width of the extension portion 202 connected thereto. The widths of the respective extension portions 202 are the same.

[0094] The width of the gap between the main body portion 201 of the first shielding line 223 and the main body portion 201 of the first trace 221 is the above-mentioned first pitch d1. The width of the gap between the main body portion 201 of the second trace 222 and the main body portion 201 of the first shielding line 223 is the above-mentioned second pitch d2; the width of the gap between the main body portion 201 of the second shielding line 224 and the main body portion 201 of the second trace 222 is the above-mentioned third pitch d3.

[0095] The width of at least a partial area of the gap between the extension portion 202 of the first shielding line 223 and the extension portion 202 of the first trace 221 is the fourth pitch d4. The width of at least a partial area of the gap between the extension portion 202 of the second trace 222 and the extension portion 202 of the first shielding line 223 is the fifth pitch d5. The width of at least a partial area of the gap between the extension portion 202 of the second shielding line 224 and the extension portion 202 of the second trace 222 is the sixth pitch d6.

[0096] Since the bonding region 1021 corresponds to the opening 61, this region is more likely to come into contact with moisture in the environment. The part of the shield wire extending into the bonding region 1021, i.e., the extending portion 202, is prone to metal electro-chemical migration. Therefore, in some embodiments of the present disclosure, the sixth pitch d6 can be made greater than the fourth pitch d4, and the sixth pitch d6 is greater than the fifth pitch d5; the sixth pitch d6 is greater than the third pitch d3, the fifth pitch d5 is greater than the second pitch d2, and the fourth pitch d4 is greater than the first pitch d1, to prevent metal electro-chemical migration of the second shield wire 224 and further reduce the failure risk. Further, based on d1, d2, and d3, d1, d2, and d3 can be increased by the same amplitude to obtain d4, d5, and d6. For example, d4 - d1 = d5 - d2 = d6 - d3 = k, where k is a real number greater than 0. Of course, d1, d2, and d3 can also be increased proportionally to obtain d4, d5, and d6.

[0097] Further, the fourth pitch d4 can be made greater than the fifth pitch d5 to prevent metal electro-chemical migration of the extending portion 202 of the first shield wire 223 and reduce the failure risk.

[0098] Of course, in other embodiments of the present disclosure, d4, d5, and d6 described above can also be equal.

[0099] The structure and specific routing manner of the peripheral trace 22 will be described below by way of example:

[0100] The bonding region 1021 can be distributed along the second direction with the first touch electrode 211. The first trace 221 can include a plurality of first sub-traces 2211. The number of the first sub-traces 2211 is equal to the number of the first touch electrodes 211. Each first touch electrode 211 is connected to the bonding region 1021 through a first sub-trace 2211. Each of the first sub-traces 2211 is located between the bonding region 1021 and the display region 101. Each first sub-trace 2211 has a plurality of first line segments, including first line segments extending along the first direction and first line segments extending along the second direction.

[0101] The second trace 222 can include a plurality of second sub-traces 2221. The number of the second sub-traces 2221 is equal to the number of the second touch electrodes 212. Each second touch electrode 212 is connected to the bonding region 1021 through a second sub-trace 2221, and each of the second sub-traces 2221 is connected to the bonding region 1021 from one side or both sides of the display region 101. Each second sub-trace 2221 has a plurality of second line segments, including second line segments extending along the first direction and second line segments extending along the second direction. In addition, the second trace 222 and the first trace 221 are arranged at intervals and do not intersect each other to avoid short circuits.

[0102] The first shielding line 223 is located between the first trace 221 and the second trace 222, and one end is connected to the bonding area 1021, while the other end is a free end not connected to other conductors and can be grounded through the bonding area 1021. Correspondingly, the first shielding line 223 is located between a first sub-trace 2211 closest to the second trace 222 and a second sub-trace 2221 closest to the first trace 221.

[0103] The first spacing d1 is the spacing of at least a partial area of the gap between the first sub-trace 2211 adjacent to the first shielding line 223 (i.e., the first sub-trace 2211 closest to the first shielding line 223) and the first shielding line 223. The second spacing d2 is the spacing of at least a partial area of the gap between the second sub-trace 2221 adjacent to the first shielding line 223 (i.e., the second sub-trace 2221 closest to the first shielding line 223) and the first shielding line 223.

[0104] Furthermore, the length of the first shielding line 223 in its extending direction is not less than the length of the shorter one of the adjacent first sub-trace 2211 and second sub-trace 2221, and less than the length of the longer one. For example, the length of the first shielding line 223 in its extending direction is greater than the length of the adjacent first sub-trace 2211 and less than the length of the adjacent second sub-trace 2221. This ensures that there is no area in the above-mentioned first sub-trace 2211 and second sub-trace 2221 that is not isolated by the first shielding line 223, thus guaranteeing the shielding effect.

[0105] The second shielding line 224 is provided outside the second trace 222, that is, outside the second sub-trace 2221 farthest from the display area 101, and the second shielding line 224 can be arranged around the display area 101. The second shielding line 224 can be provided with a cut to disconnect it, and both sides of the cut of the second shielding line 224 are connected to the bonding area 1021. Among them, the second shielding line 224 may not be a closed loop structure as long as it extends along the direction around the display area 101.

[0106] Furthermore, in some embodiments of the present disclosure, the second shielding line 224 may include a plurality of first wire bodies 2241 and second wire bodies 2242 distributed in a direction away from the display area 101. Both the first wire bodies 2241 and the second wire bodies 2242 are arranged around the display area 101, and each wire body includes two discontinuous sub-wire bodies. Each sub-wire body has a connection end extending to the bonding area 1021 and a free end opposite to the connection end, and the connection end can be connected to the corresponding bonding pad. The second wire body 2242 is a GND wire and can be grounded to play a shielding role; while the first wire body 2241 can be a Gurad wire and an AC signal can be input to it. The specific working principle of the first wire body 2241 is similar to that of the first shielding line 223 and will not be elaborated here.

[0107] The two sub-line bodies of the first line body 2241 are located on the same circular track, and the free ends of the two sub-line bodies are arranged opposite to each other on the circular track, thereby forming a disconnected incision, making the first line body 2241 discontinuous.

[0108] The second wire 2242 can be distributed along a circular trajectory and can be surrounded by an intermittent first sub-wire and a second sub-wire. The first sub-wire and the second sub-wire each have a connecting section and a free end. The connecting ends of the two extend to the binding area 1021, and the free ends of the two extend from both sides of the binding area 1021 to the side of the display area 101 away from the binding area 1021, and are arranged overlapping. In other words, the free ends of the first sub-wire and the free ends of the second sub-wire are spaced apart in a direction away from the display area 101, so that the first sub-wire and the second sub-wire are not connected. The cutout of the first wire 2241 and the overlapping area of the first sub-wire and the second sub-wire are staggered in the direction around the display area 101.

[0109] The distance between the first wire body 2241 and the second wire body 2242 is not particularly limited. The width of the first wire body 2241 may be the same as that of the first shielding wire 223 , and both may be smaller than the width of the second wire body 2242 .

[0110] The third spacing d3 is the spacing of at least a portion of the gap between the second shielding line 224 and the second sub-track 2221 adjacent to the second shielding line 224 (the second sub-track 2221 closest to the second shielding line 224). Furthermore, the third spacing d3 is the spacing of at least a portion of the gap between the adjacent first line 2241 and the second sub-track 2221, that is, the spacing of at least a portion of the gap between the first line 2241 and the second sub-track 2221 closest to it. The fourth spacing d4 to the sixth spacing d6 can refer to the aforementioned first spacing d1 to the third spacing d3 and will not be described in detail here.

[0111] like Figure 1 and Figure 2 As shown, since the first shielding line 223 is only used to shield the adjacent first routing line 221 and the second routing line 222, that is, the adjacent first sub-routing lines 2211 and the second sub-routing lines 2221, and different first sub-routing lines 2211 and the second sub-routing lines 2221 have different lengths, the first spacing d1 to the sixth spacing d6 can only be a local spacing of the peripheral routing lines 22.

[0112] Of course, in other embodiments of the present disclosure, the display area 101 and the second touch electrodes 212 may also be distributed along the first direction. The routing method thereof may refer to the above embodiment and will not be described in detail here.

[0113] like Figure 1 and Figure 4As shown, in some embodiments of the present disclosure, the touch panel of the present disclosure further includes a second insulating layer 5 and a polarizing layer 6, where:

[0114] The second insulating layer 5 covers the connection layer 003 and the surface of the first insulating layer 002 facing away from the touch layer 2. The material of the second insulating layer 5 may be the same as that of the first insulating layer 002. The polarizing layer 6 may be disposed on the surface of the second insulating layer 5 facing away from the touch layer 2, and the polarizing layer 6 is provided with an opening 61, and the bonding area 1021 is located within the orthographic projection of the opening 61 on the touch layer 2.

[0115] The embodiment of the present disclosure provides a touch display panel, such as Figures 1-4 As shown, it may include a display substrate 1 and the touch panel of any of the above embodiments. The touch panel may be disposed on one side of the display substrate 1, where:

[0116] The specific structures of the display substrate 1 and the touch panel have been described in detail in the above embodiments of the touch panel, and will not be repeated here.

[0117] It should be noted that, in order to clearly show the first pitch d1 - the sixth pitch d6 at the edge, Figure 3 and Figure 4 the first sub-trace 2211 and the second sub-trace 2221 that are irrelevant to the first pitch d1 - the sixth pitch d6 are hidden, which does not constitute a limitation on the specific number of the first sub-trace 2211 and the second sub-trace 2221.

[0118] The embodiment of the present disclosure further provides a manufacturing method of a touch display panel. The touch display panel may be the touch display panel in the above embodiments, and its structure may refer to the embodiments of the touch display panel, which will not be repeated here. The manufacturing method may include step S110 and step S120, where:

[0119] Step S110: Form a display substrate having a display area and a peripheral area located outside the display area;

[0120] Step S120: Form a touch layer on one side of the display substrate. The touch layer includes touch electrodes and peripheral traces. At least part of the touch electrodes are located in the display area, and the peripheral traces are located in the peripheral area; the touch electrodes include a first touch electrode and a second touch electrode; the peripheral traces include a first trace, a second trace, a first shield line, and a second shield line; the first trace is disposed outside the display area and connected to the first touch electrode, the first shield line is disposed outside the first trace, the second trace is disposed outside the first shield line and connected to the second touch electrode, and the second shield line is disposed outside the second trace;

[0121] The width of at least a partial region of the gap between the first shield wire and the first trace is a first pitch, the width of at least a partial region of the gap between the second trace and the first shield wire is a second pitch, and the width of at least a partial region of the gap between the second shield wire and the second trace is a third pitch;

[0122] The third pitch is greater than the first pitch and greater than the second pitch.

[0123] Further, in some embodiments of the present disclosure, after step S110 and before step S120, the manufacturing method of the present disclosure may further include step S130 and step S140, where:

[0124] Step S130: Form a hardening layer covering one side of the display substrate.

[0125] Step S140: Form a shadow elimination layer on the surface of the hardening layer facing away from the display substrate.

[0126] The touch layer is disposed on the surface of the shadow elimination layer facing away from the display substrate.

[0127] In some embodiments of the present disclosure, step S120 may include step S1210-step S1230, where:

[0128] Step S1210: Form a conductive layer on one side of the display substrate; the conductive layer includes an electrode region and a trace region; at least a part of the electrode region is located in the display region, the electrode region includes a plurality of the first touch electrodes extending along a first direction and spaced apart along a second direction, and a plurality of electrode unit groups extending along the second direction and distributed along the first direction, each electrode unit group includes a plurality of electrode units distributed along the second direction; the trace region is located in the peripheral region, and the trace region is the peripheral trace; the first direction intersects the second direction;

[0129] Step S1220: Form a first insulating layer covering the surface of the conductive layer facing away from the display substrate.

[0130] Step S1230: Form a connection layer on the surface of the first insulating layer facing away from the display substrate, the connection layer includes a plurality of connection units; in the second direction, two adjacent electrode units are connected by one connection unit; any one of the second touch electrodes includes a column of the connection units and the electrode units connected thereto.

[0131] In some embodiments of the present disclosure, the manufacturing method of the present disclosure further includes step S150 and step S160, where:

[0132] Step S150: Form a second insulating layer covering the surface of the connection layer and the first insulating layer facing away from the display substrate.

[0133] Step S160: Provide a polarizing layer on the surface of the second insulating layer facing away from the display substrate; the polarizing layer is provided with an opening, and the bonding area is located within the orthographic projection of the opening on the display substrate.

[0134] It should be noted that although the steps of the manufacturing method in the present disclosure are described in a specific order in the drawings, this does not require or imply that these steps must be executed in this specific order, or that all the steps shown must be executed to achieve the desired result. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step for execution, and / or one step may be decomposed into multiple steps for execution, etc.

[0135] An embodiment of the present disclosure provides a display device, which may include the touch display panel of any of the above embodiments. The touch display panel is the touch display panel of any of the above embodiments, and its specific structure and beneficial effects can be referred to the embodiments of the touch display panel in the above text, and will not be elaborated here. The display device of the present disclosure may be an electronic device with touch display functions such as a mobile phone, a tablet computer, a television, etc., and will not be listed one by one here.

[0136] Those skilled in the art will readily think of other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and examples are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

Claims

1. A touch panel, characterized in that, Comprising: A touch layer disposed on one side of a display substrate, the display substrate having a display area and a peripheral area outside the display area; the touch layer includes touch electrodes and peripheral traces, at least part of the touch electrodes are located in the display area, and the peripheral traces are located in the peripheral area; the touch electrodes include a first touch electrode and a second touch electrode; the first touch electrode and the second touch electrode are cross-distributed in space along mutually perpendicular first and second directions; the peripheral traces include a first trace, a second trace, a first shielding line, and a second shielding line; the first trace is disposed outside the display area and connected to the first touch electrode, the first shielding line is disposed outside the first trace, the second trace is disposed outside the first shielding line and connected to the second touch electrode, and the second shielding line is disposed outside the second trace; The width of at least a part of the gap between the first shielding line and the first trace is a first pitch, the width of at least a part of the gap between the second trace and the first shielding line is a second pitch, and the width of at least a part of the gap between the second shielding line and the second trace is a third pitch; The third pitch is greater than the first pitch and greater than the second pitch.

2. The touch panel according to claim 1, wherein, The first pitch is greater than the second pitch.

3. The touch panel according to claim 1, wherein The third pitch is less than twice the first pitch and less than twice the second pitch.

4. The touch panel according to claim 1, wherein The display area includes a bonding area; The first trace, the second trace, the first shielding line, and the second shielding line each include a main body portion and an extending portion, the main body portion is located in the display area and outside the bonding area, and the extending portion extends into the bonding area; The width of the gap between the main body portion of the first shielding line and the first trace is the first pitch; the width of the gap between the main body portion of the first shielding line and the second trace is the second pitch; the width of the gap between the main body portion of the second shielding line and the second trace is the third pitch; The width of at least a part of the gap between the extending portion of the first shielding line and the first trace is a fourth pitch; the width of at least a part of the gap between the extending portion of the first shielding line and the second trace is a fifth pitch; the width of at least a part of the gap between the extending portion of the second shielding line and the second trace is a sixth pitch; The sixth pitch is greater than the fourth pitch and greater than the fifth pitch; The sixth pitch is greater than the third pitch, the fifth pitch is greater than the second pitch, and the fourth pitch is greater than the first pitch.

5. The touch panel according to claim 4, characterized in that, The fourth pitch is greater than the fifth pitch.

6. The touch panel according to claim 1, wherein The display area includes a bonding area; The first trace, the second trace, the first shielding line, and the second shielding line each include a main body portion and an extending portion, the main body portion is located in the display area and outside the bonding area, and the extending portion extends into the bonding area; The width of the gap between the first shielding line and the main body of the first trace is the first pitch; the width of the gap between the first shielding line and the main body of the second trace is the second pitch; the width of the gap between the second shielding line and the main body of the second trace is the third pitch; The width of at least a partial region of the gap between the first shielding line and the extension of the first trace is the fourth pitch; the width of at least a partial region of the gap between the first shielding line and the extension of the second trace is the fifth pitch; the width of at least a partial region of the gap between the second shielding line and the extension of the second trace is the sixth pitch; The fourth pitch, the fifth pitch, and the sixth pitch are the same.

7. The touch panel according to claim 4 or 6, characterized in that, The width of any one of the main bodies is less than the width of the extension connected thereto; the widths of all the extensions are the same.

8. The touch panel according to claim 4 or 6, characterized in that, The touch layer includes: A conductive layer, including an electrode region and a trace region; at least a part of the electrode region is located in the display region, the electrode region includes a plurality of the second touch electrodes extending along the first direction and spaced apart along the second direction, and a plurality of electrode unit groups extending along the second direction and distributed along the first direction, and each electrode unit group includes a plurality of electrode units distributed along the second direction; the trace region is located in the peripheral region, and the trace region is the peripheral trace; A first insulating layer, covering the surface of the conductive layer facing away from the display substrate; A connection layer, provided on the surface of the first insulating layer facing away from the display substrate; the connection layer includes a plurality of connection units; in the second direction, two adjacent electrode units are connected by one connection unit; any one of the first touch electrodes includes a column of the connection units and the electrode units connected thereto.

9. The touch panel according to claim 8, wherein The touch panel further includes: A hardening layer, covering one side of the display substrate; An anti-reflection layer, provided on the surface of the hardening layer facing away from the display substrate; the touch layer is provided on the surface of the anti-reflection layer facing away from the display substrate.

10. The touch panel according to claim 8, characterized in that, The materials of the conductive layer and the connection layer both include transparent conductive materials.

11. The touch panel according to claim 8, wherein, The material of the peripheral trace includes silver metal.

12. The touch panel according to claim 8, wherein The touch panel further includes: A second insulating layer, covering the surfaces of the connection layer and the first insulating layer facing away from the substrate; A polarizing layer, provided on the surface of the second insulating layer facing away from the substrate; the polarizing layer is provided with an opening, and the bonding region is located within the orthographic projection of the opening on the display substrate.

13. A touch display panel, characterized in that, Including: A display substrate, having a display region and a peripheral region located outside the display region; The touch panel according to any one of claims 1-12, provided on one side of the display substrate.

14. A manufacturing method of a touch display panel, characterized in that, Including: Forming a display substrate, the display substrate having a display region and a peripheral region located outside the display region A touch layer is formed on one side of the display substrate. The touch layer includes touch electrodes and peripheral traces. At least part of the touch electrodes are located in the display area, and the peripheral traces are located in the peripheral area. The touch electrodes include a first touch electrode and a second touch electrode. The peripheral traces include a first trace, a second trace, a first shield line, and a second shield line. The first trace is disposed outside the display area and connected to the first touch electrode. The first shield line is disposed outside the first trace. The second trace is disposed outside the first shield line and connected to the second touch electrode. The second shield line is disposed outside the second trace. The width of at least a partial area of the gap between the first shield line and the first trace is a first pitch. The width of at least a partial area of the gap between the second trace and the first shield line is a second pitch. The width of at least a partial area of the gap between the second shield line and the second trace is a third pitch. The third pitch is greater than the first pitch and greater than the second pitch.

15. A display device, characterized in that, A touch display panel as claimed in claim 13 is included.

Images