Touch panel, touch device and method for manufacturing touch panel

Abstract

The embodiment of the present application provides a touch panel, a touch device and a method for manufacturing a touch panel, wherein the touch panel includes a substrate, a bridging electrode layer, an insulating layer, a first shadow elimination layer and a touch electrode layer stacked along the thickness direction of the touch panel. The touch electrode layer includes a spacing portion and a bridge touch electrode, and the bridging electrode layer includes a plurality of conductive bridges arranged at intervals. The first shadow elimination layer and the insulating layer are stacked between the bridging electrode layer and the touch electrode layer. The touch panel also includes a bridging portion, which electrically connects the conductive bridge and the corresponding bridge touch electrode. The touch panel provided in the embodiment of the present application has an insulating layer and a first shadow elimination layer between the touch electrode layer and the bridging electrode layer, increases the distance between the touch electrode layer and the bridging electrode layer, reduces the capacitance of the touch panel itself, improves the signal-to-noise ratio of the touch panel, and thereby improves the sensitivity of the touch function of the touch panel. At the same time, the shadow elimination effect on the touch electrode layer can also be improved, and the color difference of the touch panel can be reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of electronic products, and in particular relates to a touch panel, a touch device and a method for manufacturing the touch panel. Background Art

[0002] With the development of smart terminals, touch technology such as touch panels has gradually become the mainstream human-computer interaction control method. As touch panel related technologies gradually develop, the types of corresponding products are increasing, bringing greater convenience to people's daily life and work.

[0003] A touch panel usually includes multiple touch electrodes. When a conductive body, such as a finger of a human body, touches the touch panel, the capacitance between the touch electrodes or between the touch electrode and the ground changes. According to the change in capacitance, the touch position can be determined so that the touch device can receive the touch signal and respond accordingly. However, in some cases, when the operator operates the touch panel, the touch panel may be slow to respond or even unresponsive, that is, the touch performance of the touch panel is poor or even fails to respond. Summary of the invention

[0004] The embodiments of the present application provide a touch panel, a touch device, and a method for manufacturing a touch panel. An insulating layer and a first shadow elimination layer are arranged between the touch electrode layer and the bridging electrode layer, which can effectively reduce the capacitance of the touch panel itself, improve the signal-to-noise ratio, and thereby improve the sensitivity of the touch function of the touch panel.

[0005] In the first aspect, an embodiment of the present application provides a touch panel, comprising a substrate, a bridging electrode layer, an insulating layer, a first shadow elimination layer and a touch electrode layer stacked along the thickness direction of the touch panel; the touch electrode layer comprises a spacer and a bridge touch electrode spaced apart from the spacer; the bridging electrode layer comprises a plurality of conductive bridges spaced apart, and the conductive bridge overlaps with a spacer in the orthographic projection of the touch electrode layer; the first shadow elimination layer and the insulating layer are stacked between the bridging electrode layer and the touch electrode layer; the touch panel also comprises a bridging portion, the bridging portion passes through the insulating layer and the first shadow elimination layer to electrically connect the conductive bridge and the corresponding bridge touch electrode.

[0006] In the second aspect, an embodiment of the present application provides a method for manufacturing a touch panel, which is used to manufacture the touch panel provided by the above embodiment, including: providing a substrate; depositing a conductive transparent material on the substrate and performing patterning to form a bridging electrode layer; depositing an insulating layer and a first shadow elimination layer on the bridging electrode layer, and the deposition temperature is 240°C to 250°C; depositing a conductive transparent material on the insulating layer and the first shadow elimination layer and performing patterning to form a touch electrode layer.

[0007] In a third aspect, an embodiment of the present application provides a touch device, including the touch panel used in the above embodiment.

[0008] Compared with the related art, the embodiment of the present invention provides a touch panel, a touch device and a manufacturing method of a touch panel, wherein an insulating layer and a first shadow elimination layer are arranged between the touch electrode layer and the bridging electrode layer, thereby increasing the distance between the touch electrode layer and the bridging electrode layer, reducing the capacitance of the touch panel itself, improving the signal-to-noise ratio of the touch panel, and thus improving the sensitivity of the touch function of the touch panel. At the same time, the cooperation of the insulating layer and the first shadow elimination layer can also improve the shadow elimination effect of the touch electrode layer and reduce the color difference of the touch panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments of the present invention are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 A schematic top view of a touch panel provided in an embodiment of the present application;

[0011] Figure 2 In one embodiment Figure 1 The cross-sectional view along the BB direction;

[0012] Figure 3 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0013] Figure 4 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0014] Figure 5 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0015] Figure 6 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0016] Figure 7 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0017] Figure 8 In another embodiment Figure 1 The cross-sectional view along the BB direction;

[0018] Fig. 9 A schematic cross-sectional view of a touch control device provided in one embodiment of the present application;

[0019] Fig.10 A flow chart of a method for manufacturing a touch panel provided in one embodiment of the present application;

[0020] Fig.11 A flow chart of a method for manufacturing a touch panel provided in another embodiment of the present application;

[0021] Fig.12 The present invention provides a flowchart of a method for manufacturing a touch panel according to another embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 100, touch panel; 110, substrate; 120, bridge electrode layer; 121, conductive bridge; 130, insulating layer; 140, first shadow elimination layer; 150, touch electrode layer; 151, spacer; 152, bridge touch electrode; 153, planar touch electrode; 160, bridge portion; 170, second shadow elimination layer; 180, metal wiring;

[0024] 200, display structure; 210, array substrate; 220, light emitting layer; 230, encapsulation layer;

[0025] X, thickness direction. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] In the prior art, only one insulating layer is usually provided between the touch electrode layer and the bridge electrode layer of the touch panel, which easily causes the capacitance of the touch panel itself to be large and the signal-to-noise ratio to be low. In addition, the touch electrode layer is usually patterned, and notches are formed on the touch electrode layer. In the thickness direction of each film layer of the touch panel, the intensity of the light reflected by the notches and the light reflected by other areas will be different. When the touch panel is used in a display device, the light reflected by the touch panel will have a color difference problem.

[0029] Based on the above technical problems, the embodiments of the present invention provide a touch device, a touch panel and a manufacturing method thereof, which can improve the signal-to-noise ratio of the touch panel and reduce the chromatic aberration of the light reflected from the touch panel. Figures 1 to 12 A touch panel, a touch device and a method for manufacturing a touch panel according to embodiments of the present invention are described in detail.

[0030] The present application embodiment provides a touch panel 100, such as Figures 1 to 4 As shown, the touch panel 100 includes a substrate 110, a bridge electrode layer 120, an insulating layer 130, a first shadow elimination layer 140 and a touch electrode layer 150 stacked along the thickness direction X of the touch panel 100. The touch electrode layer 150 includes a spacer 151 and a bridge touch electrode 152 spaced from the spacer 151. The bridge electrode layer 120 includes a plurality of conductive bridges 121 spaced from each other. The conductive bridge 121 overlaps with a spacer 151 in the orthographic projection of the touch electrode layer 150. The first shadow elimination layer 140 and the insulating layer 130 are stacked between the bridge electrode layer 120 and the touch electrode layer 150. The touch panel 100 also includes a bridge 160, which penetrates the insulating layer 130 and the first shadow elimination layer 140 to electrically connect the conductive bridge 121 and the corresponding bridge touch electrode 152. Specifically, the bridge portion 160 penetrates the first shadow elimination layer 140 and the insulating layer 130 to connect two adjacent bridge contact control electrodes 152 , so that the bridge contact control electrodes 152 in the same matrix row or column are electrically connected to each other.

[0031] According to the calculation formula of capacitance, capacitance C = εS / 4πkd, where ε is the dielectric constant, S is the facing area of ​​the two plates, d is the vertical distance between the two plates, and k is the electrostatic force constant. It can be seen from the above formula that the size of the capacitance is inversely proportional to the vertical distance d between the two plates, and increasing d can reduce the capacitance. Therefore, compared with only setting the insulating layer 130 between the touch electrode layer 150 and the bridging electrode layer 120, by adding the first shadow elimination layer 140 between the touch electrode layer 150 and the bridging electrode layer 120, it is equivalent to increasing the distance between the touch electrode layer 150 and the bridging electrode layer 120, so that the capacitance between the touch electrode layer 150 and the bridging electrode layer 120 can be effectively reduced. Therefore, when the touch panel 100 is touched by a conductor, the capacitance of the touch panel 100 will change. Under the premise that the change amount △C is fixed, the smaller the capacitance C of the touch panel 100 itself, the larger the value of △C / C, and the greater the signal-to-noise ratio of the touch panel 100. That is, reducing the capacitance of the touch panel 100 itself is beneficial to improving the signal-to-noise ratio of the touch panel 100 , thereby improving the sensitivity of the touch function of the touch panel 100 .

[0032] The touch panel 100 provided in the embodiment of the present application increases the distance between the conductive bridge 121 and the touch electrode layer 150 by simultaneously setting the insulating layer 130 and the first shadow elimination layer 140 between the bridge electrode layer 120 and the touch electrode layer 150, thereby reducing the capacitance of the touch panel 100 itself, increasing the signal-to-noise ratio of the touch panel 100, and thus improving the touch sensitivity of the touch panel 100. In addition, due to the different refractive indices, the touch electrode layer 150, the insulating layer 130 and the first shadow elimination layer 140 form a reflection interface at the junction of the two adjacent ones, and each reflection interface will generate reflected light. The reflected light generated at different interfaces is incident on the human eye after coherent cancellation, so that the color difference between the area where the bridge touch electrode 152 in the touch electrode layer 150 is located and the area where the notch is located is small, and thus the pattern formed on the touch electrode layer 150 is not easily recognized by the human eye, that is, the touch panel 100 provided in the embodiment of the present application can effectively reduce the color difference.

[0033] It can be understood that the insulating layer 130 and the first shadow-eliminating layer 140 are both made of transparent insulating materials, wherein the number of layers of the first shadow-eliminating layer 140 can be one layer, two layers or more layers. When the number of layers of the first shadow-eliminating layer 140 is multiple layers, the multiple layers of the first shadow-eliminating layer 140 can be adjacent to each other or not, and there is no limitation here.

[0034] It should be noted that the insulating layer 130 can be arranged adjacent to the bridging electrode layer 120, and the first image elimination layer 140 can be arranged adjacent to the touch electrode layer 150. The insulating layer 130 can also be arranged adjacent to the touch electrode layer 150, and the first image elimination layer 140 can be arranged adjacent to the bridging electrode layer 120. The first image elimination layer 140 can also be arranged on both sides of the insulating layer 130, the touch electrode layer 150 is adjacent to the first image elimination layer 140, and the bridging electrode layer 120 is also adjacent to the first image elimination layer 140. Figure 2 The embodiment in which the insulating layer 130 is adjacent to the bridging electrode layer 120 and the first image elimination layer 140 is adjacent to the touch electrode layer 150 is shown. Figure 3 The embodiment in which the insulating layer 130 is adjacent to the touch electrode layer 150 and the first image elimination layer 140 is adjacent to the touch electrode layer 150 is shown. Figure 4 The embodiment is shown in which both sides of the insulating layer 130 are adjacent to the first image elimination layer 140, the touch electrode layer 150 is adjacent to the first image elimination layer 140, and the bridging electrode layer 120 is also adjacent to the first image elimination layer 140. It can be understood that these configurations can achieve the purpose of improving the signal-to-noise ratio of the touch panel 100 and reducing color difference.

[0035] In some embodiments, Figure 5 and Figure 6 As shown, the touch panel 100 further includes a second shadow elimination layer 170, which is disposed on the side of the touch electrode layer 150 facing away from the bridging electrode layer 120. Specifically, the second shadow elimination layer 170 and the touch electrode layer 150 have different refractive indices, and a reflective interface is formed at the junction of the two. The second shadow elimination layer 170 and the first shadow elimination layer 140 respectively fully reflect the incident light on both sides of the touch electrode, that is, a shadow elimination effect is generated on both sides of the touch electrode layer 150, further reducing the color difference of the touch panel 100.

[0036] It can be understood that the number of layers of the second shadow-eliminating layer 170 can be one layer, or two layers or more layers. When the number of second shadow-eliminating layers 170 is multiple layers, the refractive indices of two adjacent second shadow-eliminating layers 170 are also different. Therefore, a reflective interface will be formed at the junction of two adjacent second shadow-eliminating layers 170. The light reflected by different reflective interfaces will coherently cancel each other, further reducing the color difference of the touch panel 100.

[0037] In some embodiments, Figure 1As shown, the touch electrode layer 150 also includes a planar touch electrode 153 disposed between the bridge touch electrodes 152, and the spacer 151 connects two adjacent planar touch electrodes 153, and the planar touch electrode 153 and the bridge touch electrode 152 are insulated from each other. One of the planar touch electrode 153 and the bridge touch electrode 152 is used as a touch sensing electrode, and the other is used as a touch driving electrode. The adjacent planar touch electrodes 153 and the bridge touch electrodes 152 form a capacitor, and the planar touch electrode 153 and the bridge touch electrode 152 are respectively electrically connected to the touch driving chip of the touch panel 100. When an excitation signal is applied to the touch driving electrode, due to the existence of mutual capacitance, the touch sensing electrode can sense and receive the excitation signal. The size and phase shift of the received signal are related to the frequency of the excitation signal and the size of the mutual capacitance. In other words, the touch position is determined by the capacitance between the touch driving electrode and the touch sensing electrode. The touch function of the touch panel 100 can still be achieved through the above settings.

[0038] Exemplarily, the planar touch electrodes 153 and the bridge touch electrodes 152 are arranged in a rectangular shape in the touch driving layer, and the planar touch electrodes 153 in the same matrix row are electrically connected to the touch driving chip through the conductive bridge 121 and the bridge portion 160. Similarly, the planar touch electrodes 153 in the same matrix column are electrically connected to the touch driving chip through the spacer 151. With such an arrangement, the touch function of the touch panel 100 can also be realized.

[0039] In some embodiments, Figures 1 to 9 As shown, the touch panel 100 also includes a plurality of metal traces 180 disposed on the substrate 110, the plurality of metal traces 180 penetrate the insulating layer 130 and the first shadow elimination layer 140, a portion of the plurality of metal traces 180 is conductively connected to the bridge touch control electrode 152, and another portion of the plurality of metal traces 180 is conductively connected to the planar touch control electrode 153. Specifically, the bridge touch control electrode 152 in each matrix row is electrically connected to the touch control driver chip through the metal traces 180, and the planar touch control electrode 153 in each matrix column is also electrically connected to the touch control driver chip through the metal traces 180. In this way, the touch control driver chip can be bound to the substrate 110, and the planar touch control electrode 153 and the bridge touch control electrode 152 are electrically connected to the touch control driver chip respectively through the metal traces 180, which is beneficial to the circuit arrangement inside the touch panel 100 and improves the processability of the touch panel 100.

[0040] In some embodiments, Figure 2 As shown, the first shadow elimination layer 140 has multiple layers, and the multiple first shadow elimination layers 140 are disposed between the insulating layer 130 and the touch electrode layer 150. In other embodiments, as Figure 3As shown, the multi-layer first shadow elimination layer 140 is disposed between the insulating layer 130 and the bridging electrode layer 120. In some other embodiments, as Figure 4 As shown, a portion of the first shadow elimination layer 140 is disposed between the insulating layer 130 and the touch electrode layer 150, and another portion of the first shadow elimination layer 140 is disposed between the insulating layer 130 and the bridging electrode layer 120. The above three implementations can both reduce the capacitance of the touch panel 100 itself, improve the signal-to-noise ratio, and reduce the color difference of the touch panel 100.

[0041] In some embodiments, Figure 2 and Figure 5 As shown, the first shadow-eliminating layer 140 has two layers, the two first shadow-eliminating layers 140 are arranged between the insulating layer 130 and the touch electrode layer 150, and the refractive indexes of the two second shadow-eliminating layers 170 are different, the refractive indexes of the insulating layer 130 and the adjacent first shadow-eliminating layer 140 are different, and the refractive indexes of the touch electrode layer 150 and the adjacent first shadow-eliminating layer 140 are different. In this way, the first shadow-eliminating layer 140 is arranged on the side close to the touch electrode layer 150, which is conducive to improving the shadow-eliminating effect.

[0042] Specifically, the refractive index of the insulating layer 130 can be set lower than the refractive index of the first shadow-eliminating layer 140 adjacent thereto, the refractive index of the first shadow-eliminating layer 140 adjacent to the insulating layer 130 can be set higher than the refractive index of the first shadow-eliminating layer 140 adjacent to the touch electrode layer 150, and the refractive index of the touch electrode layer 150 can be set higher than the refractive index of the first shadow-eliminating layer 140 adjacent thereto, that is, the refractive index of the first shadow-eliminating layer 140 can be set higher than the refractive indexes of the two adjacent film layers, or the refractive index of the first shadow-eliminating layer 140 can be set lower than the refractive indexes of the two adjacent film layers. With such a setting, the shadow-eliminating effect of the notch in the touch electrode layer 150 can still be achieved.

[0043] Further, in one embodiment, if Figure 6 As shown, the touch panel 100 further includes a second shadow-eliminating layer 170, and the number of layers of the second shadow-eliminating layer 170 is four. The four layers of the second shadow-eliminating layer 170 are stacked and arranged on the side of the touch electrode layer 150 that faces away from the bridging electrode layer 120. The refractive indexes of the adjacent second shadow-eliminating layers 170 in the four layers of the second shadow-eliminating layer 170 are different, and the refractive indexes of the touch electrode layer 150 and the adjacent second shadow-eliminating layer 170 are different. In this way, the junction of the touch electrode layer 150 and the second shadow-eliminating layer 170 and the junction of the adjacent second shadow-eliminating layers 170 will form a reflection interface, and the light reflected by different reflection interfaces coherently cancels each other, which is conducive to improving the shadow-eliminating effect of the notch in the touch electrode layer 150.

[0044] Furthermore, in one embodiment, please continue to refer to Figure 6, the material of the insulating layer 130 includes silicon oxide, the material of the first shadow eliminating layer 140 adjacent to the insulating layer 130 in the two first shadow eliminating layers 140 includes silicon nitride, and the material of the first shadow eliminating layer 140 adjacent to the touch electrode layer 150 includes silicon oxide. The materials of the second shadow eliminating layers 170 in the four second shadow eliminating layers 170 along the direction of the touch electrode layer 150 away from the bridge electrode layer 120 include silicon nitride, silicon oxide, silicon nitride and silicon oxide in sequence. Since the refractive index of the film layer containing silicon nitride is about 1.8, the refractive index of the touch electrode layer 150 is also about 1.8, but due to the different refractive index of silicon nitride, the refractive index of the film layer containing silicon oxide is about 1.5. Therefore, from the insulating layer 130 to the second shadow eliminating layer 170, the refractive index of each film layer is: low refractive index, high refractive index, low refractive index, high refractive index, high refractive index, low refractive index, high refractive index. Through the above configuration, multiple reflective interfaces are formed on both sides of the touch electrode layer 150 , so that the light on both sides of the touch electrode layer 150 undergoes multiple coherent cancellations, which is beneficial to improving the cancellation effect of the notches in the touch electrode layer 150 .

[0045] It should be noted that although the refractive index of the touch electrode layer 150 is not much different from the refractive index of the second shadow elimination layer 170 containing silicon nitride adjacent thereto, as long as the refractive indices of the two are different, a reflective interface will still be formed and total reflection will occur. At this time, there is still a shadow elimination effect between the touch electrode layer 150 and the second shadow elimination layer 170 adjacent thereto.

[0046] It is understood that the materials used in the first shadow-eliminating layer 140 and the second shadow-eliminating layer 170 are not limited to the above-mentioned cases. For example, the materials with a higher refractive index used in the first shadow-eliminating layer 140 and the second shadow-eliminating layer 170 may also include titanium dioxide (TiO2) or niobium pentoxide (Nb2O5).

[0047] In the above embodiments, the thickness of each film layer is not limited as long as it can achieve the shadow elimination effect. Figure 6Under the film layer structure shown, the thickness of the touch electrode layer 150 is 700 angstroms to 800 angstroms, the thickness of the insulating layer 130 is 4400 angstroms to 4500 angstroms, the thickness of the two first shadow elimination layers 140 is 250 angstroms to 300 angstroms respectively, and the thickness of the four second shadow elimination layers 170 along the direction of the touch electrode layer 150 away from the bridging electrode layer 120 is 800 angstroms to 900 angstroms, 300 angstroms to 400 angstroms, 250 angstroms to 300 angstroms, and 900 angstroms to 1000 angstroms respectively. Through calculation and analysis, when the thickness of the touch electrode layer 150 is 700 angstroms to 800 angstroms, and the thickness range of other film layers in the touch panel 100 is set in this way, the maximum reflectivity of the touch panel 100 is 0.17% and the average value is 0.6%, while the maximum color difference is 4 and the average value is 6, the maximum value of the reflected hue is a*(-0.2~3) and b*(-5~1.5), and the average values ​​are a*(-0.6~6) and b*(-6~6), that is, the reflectivity, color difference and reflected hue are all within the specification requirements of the touch panel 100.

[0048] In an optional embodiment, if Figure 6 Under the film structure shown, the thickness of the touch electrode layer 150 is 750 angstroms, the thickness of the insulating layer 130 is 4465 angstroms, the thickness of the first shadow elimination layer 140 adjacent to the insulating layer 130 of the two first shadow elimination layers 140 is 250 angstroms, the thickness of the first shadow elimination layer 140 connected to the touch electrode layer 150 is 250 angstroms, and the thickness of the four second shadow elimination layers 170 along the direction of the touch electrode layer 150 away from the bridging electrode layer 120 is 845 angstroms, 335 angstroms, 250 angstroms and 930 angstroms, respectively. Through simulation, with the thickness of each film layer set in this way, the reflectivity of the touch panel 100 is 0.048%, the color difference is 0.857, and the reflection hue is a*b*(0.73,-0.14), that is, the various optical performance indicators of the touch panel 100 under this film structure are all good.

[0049] It should be noted that the thicker the touch electrode layer 150 is, the deeper the corresponding notch is, and thicker first and second image eliminating layers 140 and 170 are needed to eliminate the notch in the touch electrode layer 150 .

[0050] In an optional embodiment, if Figure 6Under the film layer structure shown, the thickness of the touch electrode layer 150 is 1200 angstroms to 1300 angstroms, the thickness of the insulating layer 130 is 3000 angstroms to 4500 angstroms, the thickness of the first shadow elimination layer 140 adjacent to the insulating layer 130 of the two layers of first shadow elimination layer 140 is 250 angstroms to 300 angstroms, the thickness of the first shadow elimination layer 140 adjacent to the touch electrode layer 150 is 300 angstroms to 450 angstroms, and the thickness of the four second shadow elimination layers 170 along the direction of the touch electrode layer 150 away from the bridging electrode layer 120 is 450 angstroms to 550 angstroms, 300 angstroms to 400 angstroms, 250 angstroms to 300 angstroms, and 450 angstroms to 550 angstroms, respectively. Similar to the previous embodiment, setting the thickness range of each film layer in this way can ensure that the touch panel 100 has better optical performance. After calculation and simulation, the maximum reflectivity of the touch panel 100 is 0.277% and the average is 0.6%, while the maximum color difference is 3.3 and the average is 6, the maximum value of the reflection hue is a*(-4~3.5) and b*(-6~0.5), and the average is a*(-0.6~6) and b*(-6~6), that is, the reflectivity, shadow elimination and reflection hue are all within the specification requirements of the touch panel 100.

[0051] For example, Figure 6 Under the film structure shown, the thickness of the touch electrode layer 150 is 1250 angstroms, the thickness of the insulating layer 130 is 3500 angstroms, the thickness of the first shadow elimination layer 140 adjacent to the insulating layer 130 of the two first shadow elimination layers 140 is 250 angstroms, the thickness of the first shadow elimination layer 140 connected to the touch electrode layer 150 is 370 angstroms, and the thickness of the four second shadow elimination layers 170 along the direction of the touch electrode layer 150 away from the bridging electrode layer 120 is 500 angstroms, 342 angstroms, 250 angstroms and 500 angstroms, respectively. Through simulation, by setting the thickness of each film layer in this way, the reflectivity of the touch panel 100 is 0.124%, the color difference is 0.769, and the reflection hue is a*b*(-0.29,-0.58), so that the various optical performance indicators of the touch panel 100 under the film structure are better.

[0052] In one embodiment, if Figure 8As shown, the first shadow-eliminating layer 140 has five layers, two of which are stacked between the insulating layer 130 and the bridging electrode layer 120, and the other three are stacked between the touch electrode layer 150 and the insulating layer 130. The insulating layer 130 has a different refractive index from the adjacent first shadow-eliminating layer 140, the touch electrode layer 150 has a different refractive index from the adjacent first shadow-eliminating layer 140, and the adjacent first shadow-eliminating layers 140 have different refractive indexes. By providing five layers of the first shadow-eliminating layer 140, the shadow-eliminating effect of the notch in the touch electrode layer 150 can be improved. In addition, a layerless first shadow-eliminating layer 140 is provided between the touch electrode layer 150 and the bridging electrode layer 120 to further increase the distance between the two, reduce the capacitance of the touch panel 100 itself, improve the signal-to-noise ratio of the touch panel 100, and improve the sensitivity of the touch function of the touch panel 100.

[0053] Further, in one embodiment, continue to refer to Figure 8 The touch panel 100 further includes a second shadow elimination layer 170, and the number of the second shadow elimination layers 170 is two layers, and the two layers of the second shadow elimination layers 170 are stacked and arranged on the side of the touch electrode layer 150 that is not facing the bridging electrode layer 120. It can be understood that the two layers of the second shadow elimination layers 170, the five layers of the first shadow elimination layers 140 and the insulating layer 130 cooperate to form a plurality of reflection interfaces on both sides of the touch electrode layer 150, and the light reflected from the plurality of reflection interfaces coherently cancels each other, further improving the shadow elimination effect of the touch panel 100 on the notch in the touch electrode layer 150.

[0054] Specifically, from the first shadow elimination layer 140 adjacent to the bridging electrode layer 120 to the second shadow elimination layer 170, the refractive index of each film layer is: high refractive index, low refractive index, high refractive index, low refractive index, high refractive index, low refractive index, high refractive index, low refractive index, high refractive index, high refractive index, etc. In this way, multiple reflective interfaces can be formed on both sides of the touch electrode layer 150 of the touch panel 100, which is conducive to improving the shadow elimination effect of the notch in the touch electrode layer 150.

[0055] Further, in one embodiment, please continue to refer to Figure 8 , the material of the insulating layer 130 includes silicon nitride, and the materials of the first shadow elimination layers 140 in the direction from the bridge electrode layer 120 to the touch electrode layer 150 include silicon nitride, silicon oxide, silicon oxide, silicon nitride and silicon oxide in sequence. The material of the second shadow elimination layer 170 adjacent to the touch electrode layer 150 in the two second shadow elimination layers 170 includes silicon oxide, and the material of the other second shadow elimination layer 170 includes silicon nitride. Such a configuration can meet the refractive index requirements of each film layer in the above embodiment, and has a better shadow elimination effect.

[0056] In some embodiments, Figure 8In the structure of each film layer of the touch panel 100 shown, the thickness of the touch electrode layer 150 is 700 angstroms to 800 angstroms, the thickness of the insulating layer 130 is 11000 angstroms to 12000 angstroms, and the thickness of the five first shadow elimination layers 140 along the direction of the bridging electrode layer 120 toward the touch electrode layer 150 is 250 angstroms to 300 angstroms, 250 angstroms to 300 angstroms, 250 angstroms to 350 angstroms, 400 angstroms to 500 angstroms, and 250 angstroms to 300 angstroms, respectively. The thickness of the two second shadow elimination layers 170 is 250 angstroms to 300 angstroms, respectively. Through calculation and analysis, setting the thickness range of each film layer in this way can effectively ensure that the touch panel 100 has better optical performance. After calculation and simulation, the maximum value of the reflectivity of the touch panel 100 is 0.344% and the average value is 0.6%, while the maximum value of the color difference is 6 and the average value is 6, the maximum value of the reflection hue is a*(0.2~3.5) and b*(-5~3.5), and the average value is a*(-0.6~6) and b*(-6~6), that is, the reflectivity, shadow elimination and reflection hue performance can meet the relevant specification requirements.

[0057] For example, in Figure 8 Under the structural design of each film layer of the touch panel 100 shown, the thickness of the touch electrode layer 150 is set to 750 angstroms, the thickness of the insulating layer 130 is set to 11660 angstroms, and the thicknesses of the five first shadow elimination layers 140 along the direction from the bridging electrode layer 120 to the touch electrode layer 150 are 250 angstroms, 250 angstroms, 292 angstroms, 426 angstroms, and 250 angstroms respectively. The thickness of the second shadow elimination layer 170 adjacent to the touch electrode layer 150 in the two second shadow elimination layers 170 is 273 angstroms, and the thickness of the other second shadow elimination layer 170 is 250 angstroms. Setting the thickness range of each film layer in this way can effectively ensure that the touch panel 100 has better optical performance. Through calculation simulation, the reflectivity of the touch panel 100 is 0.134%, the color difference is 1.34, and the reflection hue is a*b*(1.81,-0.11), that is, the performance specifications such as reflectivity, shadow elimination and reflection hue are all better.

[0058] It should be noted that the materials of the insulating layer 130, the first shadow elimination layer 140 and the second shadow elimination layer 170 are not limited to the configurations provided in the above embodiments, and may be made of one or a combination of two or more of silicon nitride, silicon oxide and silicon oxynitride.

[0059] On the other hand, the embodiment of the present application provides a touch device, including the touch panel 100 provided by any of the above embodiments. The touch device provided by the embodiment of the present application, because it includes the touch device provided by any of the above embodiments, can effectively improve the sensitivity of the touch function of the touch device and reduce the color difference of the touch device.

[0060] In an optional embodiment, if Fig. 9 As shown, the touch device further includes a display structure 200, the display structure 200 includes a stacked array substrate 210, a light-emitting layer 220 and an encapsulation layer 230, and the touch panel 100 is stacked on the encapsulation layer 230. The display structure 200 can be a liquid crystal display (LCD), an organic electroluminescent display (OEL), an organic light emitting diode display (OLED), a light emitting diode display (LED) or a plasma display panel (PDP), a field emission display (Field Emission Display), a nano-carbon tube display, an electronic ink (E-ink) display, etc.

[0061] In some optional embodiments, the touch device provided in the present application can be any product or component with touch function, such as a mobile phone, a tablet computer, a digital photo frame, a navigator, etc., which can be integrated with photosensitive components such as a camera.

[0062] In another aspect, the present application provides a method for manufacturing a touch panel 100, which is used to manufacture the touch panel 100 provided by any of the above embodiments. Fig.10 As shown, the manufacturing method of the touch panel 100 includes:

[0063] S10, providing a substrate 110. Specifically, the substrate 110 may be a transparent glass substrate.

[0064] S20, depositing a conductive transparent material on the substrate 110 and performing patterning to form the bridging electrode layer 120. Specifically, first depositing a conductive transparent material on the substrate 110, and then forming a specific pattern of the bridging electrode layer 120 by etching and other processes. The conductive transparent material may be a conductive transparent material such as SNW (silver nano wire), CNT (carbon nano tube), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), etc.

[0065] S30 , depositing the insulating layer 130 and the first image elimination layer 140 on the bridging electrode layer 120 , with the deposition temperature being 240° C. to 250° C.

[0066] S40, depositing a conductive transparent material on the insulating layer 130 and the first shadow elimination layer 140 and performing patterning to form a touch electrode layer 150. The conductive transparent material may be a conductive transparent material such as SNW (silver nanowire), CNT (carbon nano tube), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), etc.

[0067] It is understandable that, in order to form the bridge portion 160, before step S40, the first shadow elimination layer 140 and the insulating layer 130 may be etched by etching or other processes to form a via hole penetrating the first shadow elimination layer 140 and the insulating layer 130. In this way, the conductive transparent material deposited in step S40 will fill the via hole to form the bridge portion 160.

[0068] In the manufacturing method of the touch panel 100 provided in the embodiment of the present application, the deposition temperature of the insulating layer 130 and the first shadow elimination layer 140 is 240°C ~ 250°C. This temperature range is relatively low. Under the low temperature process, the insulating layer 130 and the first shadow elimination layer 140 can be made thicker, thereby meeting the requirements of the touch panel 100 of the present application for low capacitance and high shadow elimination effect.

[0069] Further, in one embodiment, if Fig.11 As shown, the manufacturing method of the touch panel 100 provided in the present application also includes:

[0070] S50 , depositing a second image elimination layer 170 on the touch electrode layer 150 at a deposition temperature of 240° C. to 250° C. A lower deposition temperature can increase the thickness of the second image elimination layer 170 , thereby improving the image elimination effect of the touch panel 100 .

[0071] In order to make the touch electrode layer 150 electrically connected to the touch driving chip, in one embodiment, as shown in FIG. Fig.12 As shown, the manufacturing method of the touch panel 100 provided in the present application also includes:

[0072] S60, etching away the insulating layer 130, the first shadow elimination layer 140 and the second shadow elimination layer 170 above the binding area of ​​the touch driver chip, depositing the metal trace 180 and performing pattern design. In this way, the touch electrode layer 150 can be electrically connected to the touch driver chip, facilitating the normal touch function of the touch panel 100.

[0073] The above is only a specific implementation of the present invention. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present invention is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.

[0074] It should also be noted that the exemplary embodiments mentioned in the present invention describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiments, or in a different order from the embodiments, or several steps can be performed simultaneously.

Claims

1. A touch panel, characterized in that: It includes a substrate, a bridging electrode layer, an insulating layer, a first image elimination layer, a touch electrode layer and a second image elimination layer which are stacked along the thickness direction of the touch panel; The touch electrode layer includes a spacing portion and a bridge touch electrode spaced apart from the spacing portion; The bridging electrode layer comprises a plurality of conductive bridges arranged at intervals, wherein the orthographic projection of the conductive bridge on the touch electrode layer overlaps with one of the spacers; The first shadow-eliminating layer and the insulating layer are stacked and arranged between the bridging electrode layer and the touch electrode layer; the second shadow-eliminating layer is arranged on the side of the touch electrode layer facing away from the bridging electrode layer; the first shadow-eliminating layer has multiple layers, and the multiple layers of the first shadow-eliminating layer are arranged between the insulating layer and the touch electrode layer, or the multiple layers of the first shadow-eliminating layer are arranged between the insulating layer and the bridging electrode layer, or a part of the first shadow-eliminating layer is arranged between the insulating layer and the touch electrode layer, and another part of the first shadow-eliminating layer is arranged between the insulating layer and the bridging electrode layer; The touch panel further includes a bridge portion, which penetrates the insulating layer and the first shadow elimination layer to electrically connect the conductive bridge and the corresponding bridge touch control electrode.

2. The touch panel according to claim 1, characterized in that: The touch electrode layer further includes a planar touch electrode disposed between the bridge touch electrodes, the spacing portion connects two adjacent planar touch electrodes, and the planar touch electrode and the bridge touch electrode are insulated from each other.

3. The touch panel according to claim 2, characterized in that: The touch panel also includes a plurality of metal traces arranged on the substrate, the plurality of metal traces pass through the insulating layer and the first shadow elimination layer, a portion of the plurality of metal traces are conductively connected to the bridge touch control electrode, and another portion of the plurality of metal traces are conductively connected to the planar touch control electrode.

4. The touch panel according to any one of claims 1 to 3, characterized in that: The first shadow-eliminating layer has two layers, and the two first shadow-eliminating layers are arranged between the insulating layer and the touch electrode layer. The refractive index of the two first shadow-eliminating layers is different. The refractive index of the insulating layer is different from that of the adjacent first shadow-eliminating layer, and the refractive index of the touch electrode layer is different from that of the adjacent first shadow-eliminating layer.

5. The touch panel according to claim 4, characterized in that: The touch panel also includes a second shadow elimination layer, and the number of layers of the second shadow elimination layer is four. The four second shadow elimination layers are stacked on the side of the touch electrode layer facing away from the bridging electrode layer. The refractive indices of adjacent second shadow elimination layers in the four second shadow elimination layers are different, and the refractive indices of the touch electrode layer and the adjacent second shadow elimination layer are different.

6. The touch panel according to claim 5, characterized in that: The insulating layer is made of silicon oxide, the first shadow elimination layer adjacent to the insulating layer in the two first shadow elimination layers is made of silicon nitride, and the first shadow elimination layer adjacent to the touch electrode layer is made of silicon oxide; The materials of the second image elimination layers in the four layers of the second image elimination layers along the direction where the touch electrode layer is away from the bridging electrode layer include silicon nitride, silicon oxide, silicon nitride and silicon oxide in sequence.

7. The touch panel according to claim 6, characterized in that: The thickness of the touch electrode layer is 700 angstroms to 800 angstroms, the thickness of the insulating layer is 4400 angstroms to 4500 angstroms, the thickness of the two first shadow elimination layers is 250 angstroms to 300 angstroms respectively, and the thickness of the four second shadow elimination layers along the direction of the touch electrode layer away from the bridging electrode layer is 800 angstroms to 900 angstroms, 300 angstroms to 400 angstroms, 250 angstroms to 300 angstroms, and 900 angstroms to 1000 angstroms respectively; or, The thickness of the touch electrode layer is 1200 angstroms to 1300 angstroms, the thickness of the insulating layer is 3000 angstroms to 4500 angstroms, the thickness of the first shadow elimination layer adjacent to the insulating layer of the two layers of the first shadow elimination layer is 250 angstroms to 300 angstroms, the thickness of the first shadow elimination layer adjacent to the touch electrode layer is 300 angstroms to 450 angstroms, and the thickness of the four layers of the second shadow elimination layer along the direction of the touch electrode layer away from the bridging electrode layer is 450 angstroms to 550 angstroms, 300 angstroms to 400 angstroms, 250 angstroms to 300 angstroms, and 450 angstroms to 550 angstroms, respectively.

8. The touch panel according to any one of claims 1 to 3, characterized in that: The first shadow elimination layer has five layers, two of the five first shadow elimination layers are stacked between the insulating layer and the bridging electrode layer, and the other three are stacked between the touch electrode layer and the insulating layer; The insulating layer has a different refractive index from the adjacent first shadow-eliminating layer, the touch electrode layer has a different refractive index from the adjacent first shadow-eliminating layer, and the adjacent first shadow-eliminating layers have different refractive indices.

9. The touch panel according to claim 8, characterized in that: The touch panel also includes two second shadow-eliminating layers, and the two second shadow-eliminating layers are stacked on the side of the touch electrode layer facing away from the bridging electrode layer. The two second shadow-eliminating layers have different refractive indices, and the touch electrode layer and the adjacent second shadow-eliminating layer have different refractive indices.

10. The touch panel according to claim 9, characterized in that: The material of the insulating layer includes silicon nitride, and the materials of the first shadow elimination layers in the five layers along the direction from the bridge electrode layer to the touch electrode layer include silicon nitride, silicon oxide, silicon oxide, silicon nitride and silicon oxide in sequence; The material of the second image elimination layer adjacent to the touch electrode layer of the two second image elimination layers includes silicon oxide, and the material of the other second image elimination layer includes silicon nitride.

11. The touch panel according to claim 10, characterized in that: The thickness of the touch electrode layer is 700 angstroms to 800 angstroms, the thickness of the insulating layer is 11,000 angstroms to 12,000 angstroms, and the thickness of the five layers of the first shadow elimination layer along the direction from the bridging electrode layer to the touch electrode layer are 250 angstroms to 300 angstroms, 250 angstroms to 300 angstroms, 250 angstroms to 350 angstroms, 400 angstroms to 500 angstroms, and 250 angstroms to 300 angstroms, respectively. The thickness of the two layers of the second shadow elimination layer are 250 angstroms to 300 angstroms, respectively.

12. A method for manufacturing a touch panel, used for manufacturing the touch panel according to any one of claims 1 to 11, characterized in that: include: providing the substrate; Depositing a conductive transparent material on the substrate and performing patterning to form the bridging electrode layer; Depositing the insulating layer and the first shadow elimination layer on the bridging electrode layer at a deposition temperature of 240° C. to 250° C.; The conductive transparent material is deposited on the insulating layer and the first shadow elimination layer and patterned to form the touch electrode layer.

13. A touch device, characterized in that: It comprises the touch panel as claimed in any one of claims 1 to 11.

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