Touch display panel and touch display device

Abstract

The application provides a touch display panel and a touch display device. Dummy lines are added in the same layer as touch signal lines in a wiring layer. In the projection of the wiring layer and the electrode layer on the packaging layer, the difference between the number of electrode lines between two adjacent touch signal lines and the number of electrode lines between two adjacent dummy lines is less than or equal to 1, so that the distribution density of the touch signal lines and the distribution density of the dummy lines are close or the same. In this way, the wiring structure difference between the area where the touch signal lines are located and the area where the dummy lines are located on the touch display panel can be reduced, the light reflection performance difference between the area where the touch signal lines are located and the area where the dummy lines are located can be reduced, and the dark lines caused by the light reflection performance difference between different areas after the reliability test of the touch display panel can be effectively reduced, so that the display effect of the touch display panel is improved.

Description

Technical Field

[0001] This application belongs to the field of touch display technology, and in particular relates to a touch display panel and a touch display device. Background Technology

[0002] Touch and Display Driver Integration (TDDI) is a current research hotspot in the field of touch displays. Its main feature is the integration of previously independent touch and display functions, thereby simplifying the structure and manufacturing process and improving touch sensitivity. After manufacturing, touch display panels undergo reliability testing. However, after these tests, dark lines may appear in the touch-sensing area, affecting the display effect. Summary of the Invention

[0003] This application provides a touch display panel and a touch display device to improve the dark pattern phenomenon that appears on the touch display panel after reliability testing.

[0004] In a first aspect, embodiments of this application provide a touch display panel, including:

[0005] A wiring layer and an electrode layer are stacked on the encapsulation layer of the touch display panel; the wiring layer includes multiple touch signal lines and multiple dummy lines, which are arranged in parallel; the electrode layer includes multiple electrode lines.

[0006] In the projection of the trace layer and electrode layer onto the encapsulation layer, there is at least one electrode line between two adjacent touch signal lines and at least one electrode line between two adjacent dummy lines; the difference between the number of electrode lines between two adjacent touch signal lines and the number of electrode lines between two adjacent dummy lines is less than or equal to 1.

[0007] An insulating layer is disposed between the wiring layer and the electrode layer. The insulating layer has conductive holes, and the electrode lines and the touch signal lines are connected through the conductive holes.

[0008] Optionally, the projection shape of the touch signal line on the encapsulation layer is consistent with the projection shape of the dummy line on the encapsulation layer.

[0009] Optionally, the difference between the cross-sectional width of the touch signal line and the cross-sectional width of the dummy line is less than or equal to 5 nanometers.

[0010] Optionally, the projection of each of the touch signal lines on the encapsulation layer is located within the projection of one of the electrode lines, and the projection of each of the dummy lines on the encapsulation layer is located within the projection of one of the electrode lines.

[0011] Optionally, the plurality of electrode lines include a plurality of touch electrodes and a plurality of dummy electrodes, the plurality of touch electrodes and the plurality of dummy electrodes are arranged in parallel, and the touch signal line is electrically connected to the touch electrodes;

[0012] In the projection of the trace layer and electrode layer onto the encapsulation layer, the electrode line between two adjacent touch signal lines is a dummy electrode, and the electrode line between two adjacent dummy lines is a touch electrode.

[0013] Optionally, the projection shape of the touch electrode on the encapsulation layer is consistent with the projection shape of the dummy electrode on the encapsulation layer.

[0014] Optionally, the difference between the cross-sectional width of the touch electrode and the cross-sectional width of the dummy electrode is less than or equal to 5 nanometers.

[0015] Optionally, the projection of each of the touch signal lines on the encapsulation layer is located within the projection of one of the dummy electrodes, and the projection of each of the dummy lines on the encapsulation layer is located within the projection of one of the touch electrodes.

[0016] Optionally, the wiring layer is disposed on the encapsulation layer, and the electrode layer is disposed on the side of the wiring layer away from the encapsulation layer.

[0017] Secondly, embodiments of this application also provide a touch display device, which includes a controller, a driving circuit, and a touch display panel as described above, wherein the controller is connected to the driving circuit, and the driving circuit is connected to the touch display panel.

[0018] The touch display panel provided in this application embodiment adds dummy lines on the same layer as the touch signal lines in the wiring layer. In the projection formed on the encapsulation layer by the wiring layer and the electrode layer, the difference between the number of electrode lines between two adjacent touch signal lines and the number of electrode lines between two adjacent dummy lines is less than or equal to 1, so that the distribution density of the touch signal lines and the distribution density of the dummy lines are close to or the same. In this way, the difference in wiring structure between the area where the touch signal lines are located and the area where the dummy lines are located on the touch display panel can be reduced, thereby reducing the difference in reflectivity between the areas where the touch signal lines are located and the areas where the dummy lines are located. After the touch display panel has undergone reliability testing, the dark lines caused by the difference in reflectivity between different areas can be effectively reduced, thereby improving the display effect of the touch display panel. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0021] Figure 1 This is a plan view of the touch display panel provided in an embodiment of this application.

[0022] Figure 2 This is a cross-sectional schematic diagram of a touch display panel in the prior art.

[0023] Figure 3 This is a schematic diagram of the projection of the wiring layer and electrode layer on the encapsulation layer in the touch display panel provided in the embodiments of this application.

[0024] Figure 4 This is a schematic diagram of the projection of the wiring layer and electrode layer on the encapsulation layer in a touch display panel provided in another embodiment of this application.

[0025] Figure 5 This is a cross-sectional schematic diagram of a touch display panel provided in an embodiment of this application.

[0026] Figure 6 This is a cross-sectional schematic diagram of the touch wiring area in an embodiment of this application.

[0027] Figure 7 This is a cross-sectional schematic diagram of the touch sensing area in an embodiment of this application.

[0028] Figure 8 This is a schematic flowchart illustrating a method for manufacturing a touch display panel according to an embodiment of this application.

[0029] 100 Touch display panel; 10 Display area; 20 Non-display area; 11 Touch routing area; 12 Touch sensing area; 30 Encapsulation layer; 41 Touch signal line; 42 Dummy line; 50 Insulating layer; 61 Touch electrode; 62 Dummy electrode; Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] This application provides a touch display panel 100 and a display device to improve the dark pattern phenomenon that appears in the touch display panel 100 after reliability testing. The following description is in conjunction with the accompanying drawings.

[0032] The touch display panel 100 provided in this embodiment is a thin-film transistor (TFT) touch display panel. The touch display panel 100, from bottom to top, sequentially includes a flexible substrate, a thin-film transistor layer, an organic light-emitting layer, a thin-film encapsulation layer, a touch layer, a color filter layer, and a glass cover. The thin-film transistor layer includes a plurality of thin-film transistors disposed on the flexible substrate, a planar organic layer covering the thin-film transistors, an anode layer located on the planar organic layer, and a pixel definition layer located on the anode layer. Each thin-film transistor includes an active layer, a gate insulating layer, a gate, an interlayer insulating layer, and a source / drain layer, sequentially stacked from bottom to top. The drain and source of the thin-film transistor are located on the source / drain layer. The touch layer includes a wiring layer and an electrode layer.

[0033] Please see Figure 1 , Figure 1 This is a plan view of a touch display panel 100 provided in an embodiment of this application. The touch display panel 100 includes a display area 10 and a non-display area 20. The display area 10 includes a touch wiring area 11 and a touch sensing area 12. The non-display area 20 is provided with a touch integrated circuit, and the display area 10 is provided with touch electrodes 61 and touch signal lines 41. One end of each touch signal line 41 is electrically connected to the touch electrode 61, and the other end is electrically connected to the touch integrated circuit. The touch display panel 100 provided in this application embodiment is a self-capacitive touch display panel 100. The touch principle of the self-capacitive touch display panel 100 is as follows: The self-capacitive touch display panel 100 has an electrode array composed of multiple self-capacitive touch electrodes 61. Each self-capacitive touch electrode 61 forms a capacitor with ground. When a finger touches the self-capacitive touch panel, the capacitance of the finger is superimposed on the capacitance of the panel, thereby increasing the capacitance of the panel. During touch detection, the self-capacitive touch panel sequentially detects the horizontal self-capacitive touch electrodes 61 and the vertical self-capacitive touch electrodes 61. Based on the change in capacitance before and after the touch, the horizontal and vertical coordinates of the touch point are determined respectively, and then combined into planar touch coordinates to obtain the position information of the touch point.

[0034] In the existing technology, please refer to Figure 2 , Figure 2This is a cross-sectional schematic diagram of a prior art touch display panel 100. The touch display panel 100 includes a wiring layer formed on a packaging layer 30, an insulating layer 50 covering the wiring layer, and an electrode layer formed on the insulating layer 50. The wiring layer only includes touch signal lines 41 disposed in the touch wiring area 11; no wiring structure is disposed in the touch sensing area 12. Conductive vias are formed in the insulating layer 50, and the touch signal lines 41 are electrically connected to the touch electrodes 61 through the conductive vias to transmit the touch signals generated by the touch electrodes 61 to the touch integrated circuit. The touch integrated circuit can be, for example, a flexible printed circuit board.

[0035] After the initial fabrication of the touch display panel 100, reliability testing is required to ensure the factory pass rate of the touch display panel 100. Reliability testing can be a double 85 test, which involves placing the touch display panel 100 in a constant temperature and humidity chamber at 85°C and 85% humidity. The double 85 test confirms that the touch display panel 100 can withstand the negative temperature effects following high temperature and high humidity, as well as fatigue and thermal failure caused by repeated temperature changes.

[0036] In the prior art, after undergoing reliability testing, dark lines appear in some areas of the touch display panel 100. The reason for the dark lines is the difference in reflectivity caused by the difference in the wiring structure between the touch sensing area 12 and the touch wiring area 11 of the wiring layer. In other words, the wiring layer has touch signal lines 41 in the touch wiring area 11, but no wiring structure in the touch sensing area 12.

[0037] Therefore, please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of the projection of the wiring layer and electrode layer on the encapsulation layer in the touch display panel provided in the embodiments of this application. Figure 4This is a schematic diagram of the projection of the wiring layer and electrode layer on the encapsulation layer in a touch display panel provided in another embodiment of this application. The touch display panel 100 provided in this application embodiment includes: a wiring layer and an electrode layer, which are stacked on the encapsulation layer 30 of the touch display panel 100; the wiring layer includes multiple touch signal lines 41 and multiple dummy lines 42, which are arranged in parallel; the electrode layer includes multiple electrode lines; in the projection of the wiring layer and the electrode layer onto the encapsulation layer 30, there is at least one electrode line between two adjacent touch signal lines 41 and at least one electrode line between two adjacent dummy lines 42; the difference between the number of electrode lines between two adjacent touch signal lines 41 and the number of electrode lines between two adjacent dummy lines 42 is less than or equal to 1; an insulating layer 50 is disposed between the wiring layer and the electrode layer, and the insulating layer 50 has conductive holes through which the electrode lines and the touch signal lines 41 are connected.

[0038] Specifically, in this embodiment, the encapsulation layer 30 can be a thin-film encapsulation layer used to encapsulate a thin-film transistor array substrate. The specific positional relationship between the wiring layer and the electrode layer and the encapsulation layer 30 is not limited; the wiring layer can be located between the electrode layer and the encapsulation layer 30, or vice versa, as long as the wiring layer and the electrode layer are stacked on the encapsulation layer 30 of the touch display panel 100. For example, the wiring layer is disposed on the encapsulation layer 30, and the electrode layer is disposed on the side of the wiring layer away from the encapsulation layer 30.

[0039] The wiring layer includes both the touch signal lines 41 located in the touch wiring area 11 and the dummy lines 42 located in the touch sensing area 12. The dummy lines 42 do not serve an actual connection function; they are only used to increase the wiring density of the wiring layer in the touch sensing area 12. Because the dummy lines 42 are added to the wiring layer in the touch sensing area 12, the interlayer structure of the touch sensing area 12 is more consistent with that of the touch wiring area 11, thereby reducing the structural differences between the touch sensing area 12 and the touch wiring area 11. This reduces the reflectivity of the touch sensing area 12 and the touch wiring area 11. Therefore, after reliability testing, the touch display panel 100 can reduce the occurrence of dark lines, thereby improving the display effect of the touch display panel 100 and increasing the factory pass rate.

[0040] The multiple electrode lines include multiple touch electrodes 61 and multiple dummy electrodes 62, which are arranged in parallel. The touch signal line 41 is electrically connected to the touch electrodes 61. It should be noted that the touch sensing area 12 specifically refers to the area on the electrode layer where the touch electrodes 61 are located. However, since the wiring layer and the electrode layer are separated, the touch signal line 41 in the wiring layer can also be located within the touch sensing area 12, and the dummy line 42 can also be located within the touch wiring area 11, as long as the touch signal line 41 and the touch electrode 61 are connected through the conductive holes of the insulating layer 50.

[0041] The display area 10 has multiple touch sensing areas 12, and each touch sensing area 12 has multiple touch electrodes 61 distributed thereon, so that the multiple touch electrodes 61 are combined into a touch sensing unit in each sensing area. Each touch sensing unit needs to transmit touch signals to the touch integrated circuit through a touch signal line 41. It can be understood that the total number of touch signal lines 41 and dummy lines 42 is actually less than the number of electrode lines.

[0042] Please refer to the details as well. Figure 6 and Figure 7 , Figure 6 This is a cross-sectional schematic diagram of the touch wiring area in an embodiment of this application. Figure 7 This is a cross-sectional schematic diagram of the touch sensing area in an embodiment of this application. The wiring layer includes multiple touch signal lines 41 and multiple dummy lines 42, which are arranged in parallel. In the projection of the wiring layer and the electrode layer onto the encapsulation layer 30, there is at least one electrode line between two adjacent touch signal lines 41 and at least one electrode line between two adjacent dummy lines 42. The difference between the number of electrode lines between two adjacent touch signal lines 41 and the number of electrode lines between two adjacent dummy lines 42 is less than or equal to 1.

[0043] Taking a scenario where multiple touch signal lines 41 are distributed in the touch wiring area and multiple dummy lines 42 are distributed in the touch sensing area 12 as an example, if the difference between the number of electrode lines between two adjacent touch signal lines 41 and the number of electrode lines between two adjacent dummy lines 42 on the projection surface of the encapsulation layer 30 is less than or equal to 1, it indicates that the distribution density of the touch signal lines 41 and the distribution density of the dummy lines 42 are close to and nearly the same. In this way, the wiring difference between the touch wiring area 11 and the touch sensing area 12 in the wiring layer can be further reduced, thereby further reducing the difference in reflectivity between the areas where the touch signal lines 41 and the dummy lines 42 are located. This allows the dark lines caused by the difference in reflectivity between different areas to be effectively reduced after the touch display panel 100 has undergone reliability testing, thus improving the display effect of the touch display panel 100.

[0044] The projection shape of the touch signal line 41 on the encapsulation layer 30 can be the same as or different from the projection shape of the dummy line 42 on the encapsulation layer 30. For example, the projection shape of the touch signal line 41 on the encapsulation layer 30 is consistent with the projection shape of the dummy line 42 on the encapsulation layer 30. The projection shapes of the touch signal line 41 and the dummy line 42 on the encapsulation layer 30 represent the routing patterns of the touch signal line 41 and the dummy line 42. Having the same routing pattern can further reduce the structural differences between the touch signal line 41 in the touch wiring area 11 and the dummy line 42 in the touch sensing area 12, thereby further eliminating the differences in reflectivity between the touch wiring area 11 and the touch sensing area 12, and further reducing the dark lines appearing on the touch display panel 100 after reliability testing.

[0045] The cross-sectional width of the touch signal line 41 may be the same as or different from the cross-sectional width of the dummy line 42. For example, the difference between the cross-sectional width of the touch signal line 41 and the cross-sectional width of the dummy line 42 is less than or equal to 5 nanometers. This makes the cross-sectional width of the touch signal line 41 and the dummy line 42 nearly identical, further reducing the structural differences between the touch signal line 41 in the touch wiring area 11 and the dummy line 42 in the touch sensing area 12. This further eliminates the difference in reflectivity between the touch wiring area 11 and the touch sensing area 12, thereby further reducing dark lines appearing on the touch display panel 100 after reliability testing.

[0046] For example, please refer to Figure 5 , Figure 5 This is a cross-sectional schematic diagram of the touch display panel provided in an embodiment of this application. The projection of each touch signal line 41 on the encapsulation layer 30 lies within the projection of one electrode line, and the projection of each dummy line 42 on the encapsulation layer 30 lies within the projection of one electrode line. This reduces the interlayer structural difference between the area containing the touch signal line 41 and the area containing the dummy line 42, further eliminating the difference in reflectivity between the touch trace area 11 and the touch sensing area 12, thereby further reducing dark lines appearing on the touch display panel 100 after reliability testing.

[0047] For example, such as Figure 3 As shown, in the projection of the wiring layer and electrode layer onto the encapsulation layer 30, the electrode line between two adjacent touch signal lines 41 is a dummy electrode 62, and the electrode line between two adjacent dummy lines 42 is a touch electrode 61.

[0048] It is understandable that the dummy electrode 62 does not serve a touch sensing function or a signal connection function, but is only used to reduce the difference in the wiring structure between the touch sensing area 12 and the touch wiring area 11 on the electrode layer; that is, the dummy electrode 62 is located in the touch wiring area 11 of the electrode layer.

[0049] The dummy electrode 62 can reduce the difference in the wiring structure between the touch sensing area 12 and the touch wiring area 11 on the electrode layer, thereby reducing the difference in reflectivity between the touch sensing area 12 and the touch wiring area 11. This allows the dark lines caused by the difference in reflectivity between different areas of the touch display panel 100 to be effectively reduced after the reliability test, thus improving the display effect of the touch display panel 100.

[0050] The distribution density of touch electrodes 61 in the touch sensing area 12 can be the same as or different from the distribution density of dummy electrodes 62 in the touch wiring area 11. For example, the difference between the spacing of two adjacent touch electrodes 61 and the spacing of two adjacent dummy electrodes 62 is less than or equal to 5 nanometers. When the difference between the spacing of two adjacent touch electrodes 61 and the spacing of two adjacent dummy electrodes 62 is less than or equal to 5 nanometers, it indicates that the distribution density of touch electrodes 61 is close to and nearly the same as the distribution density of dummy electrodes 62. This further reduces the wiring difference between the touch wiring area 11 and the touch sensing area 12 in the electrode layer, thereby further reducing the difference in reflectivity between the areas where touch electrodes 61 and dummy electrodes 62 are located. This effectively reduces dark lines caused by differences in reflectivity between different areas after the touch display panel 100 has undergone reliability testing, thus improving the display effect of the touch display panel 100.

[0051] The projection shape of the touch electrode 61 on the encapsulation layer 30 may be the same as or different from the projection shape of the dummy electrode 62 on the encapsulation layer 30. For example, the projection shape of the touch electrode 61 on the encapsulation layer 30 may be the same as the projection shape of the dummy electrode 62 on the encapsulation layer 30. The projection shapes of the touch electrode 61 and the dummy electrode 62 on the encapsulation layer 30 represent the routing patterns of the touch electrode 61 and the dummy electrode 62. Having the same routing pattern can further reduce the structural differences between the touch electrode 61 in the touch sensing area 12 and the dummy electrode 62 in the touch routing area 11, thereby further eliminating the differences in reflectivity between the touch routing area 11 and the touch sensing area 12, and further reducing the dark lines appearing on the touch display panel 100 after reliability testing.

[0052] The cross-sectional width of the touch electrode 61 may be the same as or different from the cross-sectional width of the dummy electrode 62. For example, the difference between the cross-sectional width of the touch electrode 61 and the cross-sectional width of the dummy electrode 62 is less than or equal to 5 nanometers. This makes the cross-sectional width of the touch electrode 61 and the dummy electrode 62 nearly identical, further reducing the structural differences between the touch electrode 61 in the touch sensing area 12 and the dummy electrode 62 in the touch wiring area 11. This further eliminates the difference in reflectivity between the touch wiring area 11 and the touch sensing area 12, thereby further reducing dark lines appearing on the touch display panel 100 after reliability testing.

[0053] For example, such as Figure 3 and Figure 4 As shown, the projection of each touch signal line 41 on the encapsulation layer 30 lies within the projection of one of the dummy electrodes 62, and the projection of each dummy line 42 on the encapsulation layer 30 lies within the projection of one of the touch electrodes 61. This further reduces the interlayer structural difference between the area containing the touch signal line 41 and the area containing the dummy line 42, thereby further eliminating the difference in reflectivity between the touch trace area 11 and the touch sensing area 12, and thus further reducing the dark lines appearing on the touch display panel 100 after reliability testing.

[0054] For example, the projection shape of the touch signal line 41 on the encapsulation layer 30 is consistent with the projection shape of the dummy electrode 62 on the encapsulation layer 30, and the projection shape of the dummy line 42 on the encapsulation layer 30 is consistent with the projection shape of the touch electrode 61 on the encapsulation layer 30. This reduces the interlayer structural differences between the electrode layer and the wiring layer, thereby reducing the reflectivity differences in the interlayer structure of the touch display panel 100. This effectively reduces dark lines caused by reflectivity differences between different areas after reliability testing, thus improving the display effect of the touch display panel 100.

[0055] For example, please refer to Figure 8 , Figure 8 This is a schematic flowchart illustrating a method for manufacturing a touch display panel 100 according to an embodiment of this application. This application also proposes a method for manufacturing a touch display panel 100 to produce the touch display panel 100 as described above; the method for manufacturing the touch display panel 100 includes:

[0056] S100, provides a display panel;

[0057] S200, A wiring layer is formed on the encapsulation layer 30 of the display panel; the wiring layer includes multiple touch signal lines 41 and multiple dummy lines 42, and the multiple touch signal lines 41 and the multiple dummy lines 42 are arranged in parallel.

[0058] S300, An insulating layer 50 is formed on the wiring layer;

[0059] S400, Conductive holes are formed in the insulating layer 50;

[0060] S500, An electrode layer is formed on the insulating layer 50; the electrode layer includes multiple electrode lines; in the projection of the wiring layer and the electrode layer onto the encapsulation layer 30, there is at least one electrode line between two adjacent touch signal lines 41, and at least one electrode line between two adjacent dummy lines 42; the difference between the number of electrode lines between two adjacent touch signal lines 41 and the number of electrode lines between two adjacent dummy lines 42 is less than or equal to 1.

[0061] In step S200, after cleaning and drying the surface of the encapsulation layer 30, a metal material thin film is deposited on the surface of the encapsulation layer 30 using a physical vapor deposition (PVD) process. The film thickness and other parameters can be set by adjusting relevant process parameters, for example. Based on this, the metal material thin film distributed across the entire surface is patterned: a layer of photoresist (using positive photoresist as an example) is coated onto the unpatterned metal material thin film using, for example, spin coating. Ultraviolet light is used to irradiate the photoresist in the entire area to be etched through a mask to ensure full exposure. The film is then placed in a developer to remove all the photoresist in the area to be etched. The remaining photoresist is used as a mask to etch the unpatterned wiring layer. After etching, the remaining photoresist is removed, forming the patterned wiring layer. The wiring layer can be made of metals with low resistivity, such as Mo, Al, Au, Ag, or Cu.

[0062] Step S300 includes depositing an insulating layer 50 over the encapsulation layer 30 and the wiring layer using a chemical vapor deposition (CVD) process. The thickness of the insulating layer 50 may need to meet the thickness requirements of the touch display panel 100. The setting of parameters such as the film thickness can be achieved, for example, by adjusting relevant process parameters. The insulating layer 50 can be made of inorganic insulating materials such as silicon oxide, silicon nitride, or silicon oxynitride.

[0063] Step S400 includes coating a layer of photoresist on the insulating layer 50 by, for example, spin coating; irradiating the photoresist in the entire via area with ultraviolet light through a mask to fully expose it; placing it in a developer to remove all the photoresist in the via area through development; using the remaining photoresist as a mask to etch the insulating layer 50; and removing the remaining photoresist after etching is completed.

[0064] In step S500, a metal thin film is deposited on the insulating layer 50 using a physical vapor deposition (PVD) process. The film thickness and other parameters can be set by adjusting relevant process parameters, for example. Based on this, the metal thin film distributed across the entire surface is patterned: a layer of photoresist (using positive photoresist as an example) is coated onto the unpatterned metal thin film using, for example, spin coating. Ultraviolet light is used to irradiate the photoresist in the entire area to be etched through a mask to ensure full exposure. The film is then placed in a developer to remove all the photoresist in the etched area. The remaining photoresist is used as a mask to etch the unpatterned electrode layer. After etching, the remaining photoresist is removed, forming the patterned electrode layer. The electrode layer can be made of a transparent conductive material such as indium tin oxide (ITO).

[0065] For example, this application also proposes a touch display device, which includes a controller, a driving circuit, and a touch display panel 100 as described above. The controller is connected to the driving circuit, and the driving circuit is connected to the touch display panel 100. The touch display device can be any product or component with display functionality, such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0066] The touch display panel 100 provided in this application embodiment adds a dummy line 42 on the same layer as the touch signal line 41 in the wiring layer. In the projection formed on the encapsulation layer 30 by the wiring layer and the electrode layer, the difference between the number of electrode lines between two adjacent touch signal lines 41 and the number of electrode lines between two adjacent dummy lines 42 is less than or equal to 1, so that the distribution density of the touch signal lines 41 and the distribution density of the dummy lines 42 are close to or the same. In this way, the difference in wiring structure between the area where the touch signal lines 41 and the area where the dummy lines 42 are located on the touch display panel 100 can be reduced, thereby reducing the difference in reflectivity between the areas where the touch signal lines 41 and the areas where the dummy lines 42 are located. After the touch display panel 100 has undergone reliability testing, the dark lines caused by the difference in reflectivity between different areas can be effectively reduced, thereby improving the display effect of the touch display panel 100.

[0067] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0068] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined as "first" or "second" may explicitly or implicitly include one or more features. The touch display panel provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application; at the same time, for those skilled in the art, based on the ideas of this application, there will be changes in specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A touch display panel, characterized in that, include: A wiring layer and an electrode layer are stacked on the encapsulation layer of the touch display panel; the wiring layer includes multiple touch signal lines and multiple dummy lines, which are arranged in parallel; the electrode layer includes multiple electrode lines. In the projection of the trace layer and electrode layer onto the encapsulation layer, there is at least one electrode line between two adjacent touch signal lines and at least one electrode line between two adjacent dummy lines; the difference between the number of electrode lines between two adjacent touch signal lines and the number of electrode lines between two adjacent dummy lines is less than or equal to 1. An insulating layer is disposed between the wiring layer and the electrode layer. The insulating layer has a conductive hole, and the electrode line and the touch signal line are connected through the conductive hole. The touch display panel includes a display area and a non-display area. The display area includes a touch wiring area and a touch sensing area. The touch wiring area and the touch sensing area are arranged in parallel. The touch signal line is located in the touch routing area, and the dummy line is located in the touch sensing area.

2. The touch display panel according to claim 1, characterized in that, The projection shape of the touch signal line on the encapsulation layer is the same as the projection shape of the dummy line on the encapsulation layer.

3. The touch display panel according to claim 1, characterized in that, The difference between the cross-sectional width of the touch signal line and the cross-sectional width of the dummy line is less than or equal to 5 nanometers.

4. The touch display panel according to claim 1, characterized in that, The projection of each of the touch signal lines on the encapsulation layer lies within the projection of one of the electrode lines, and the projection of each of the dummy lines on the encapsulation layer lies within the projection of one of the electrode lines.

5. The touch display panel according to any one of claims 1 to 4, characterized in that, The multiple electrode lines include multiple touch electrodes and multiple dummy electrodes, which are arranged in parallel. The touch signal lines are electrically connected to the touch electrodes. In the projection of the trace layer and electrode layer onto the encapsulation layer, the electrode line between two adjacent touch signal lines is a dummy electrode, and the electrode line between two adjacent dummy lines is a touch electrode.

6. The touch display panel according to claim 5, characterized in that, The projection shape of the touch electrode on the encapsulation layer is the same as the projection shape of the dummy electrode on the encapsulation layer.

7. The touch display panel according to claim 5, characterized in that, The difference between the cross-sectional width of the touch electrode and the cross-sectional width of the dummy electrode is less than or equal to 5 nanometers.

8. The touch display panel according to claim 5, characterized in that, The projection of each of the touch signal lines on the encapsulation layer lies within the projection of one of the dummy electrodes.

9. The touch display panel according to claim 1, characterized in that, The wiring layer is disposed on the encapsulation layer, and the electrode layer is disposed on the side of the wiring layer away from the encapsulation layer.

10. A touch display device, characterized in that, It includes a controller, a driving circuit, and a touch display panel as described in any one of claims 1 to 9, wherein the controller is connected to the driving circuit, and the driving circuit is connected to the touch display panel.

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