Touch panel and touch display screen

Abstract

The application provides a touch panel and a touch display screen. The touch panel comprises a touch electrode area, and the touch electrode area comprises: at least one first electrode sequence, each first electrode sequence comprising a plurality of connected first touch electrodes arranged along a first direction; at least one second electrode sequence, each second electrode sequence being in the same plane as each first electrode sequence, each second electrode sequence comprising a plurality of second touch electrodes arranged along a second direction and sequentially spaced apart, and a connected area between adjacent first touch electrodes in each first electrode sequence being located in a spaced area between adjacent second touch electrodes; a plurality of connection structures, the connection structures being used for connecting adjacent second touch electrodes in each second electrode sequence; and a plurality of insulation structures, each insulation structure being arranged at a projection image overlap between the connection structures and the connected area.

Description

Technical Field

[0001] This application relates to the field of touch display technology, and more particularly to a touch panel and a touch display screen. Background Technology

[0002] In existing technologies, external touch sensors are components independent of the display panel. This means the touch panel needs to be integrated with other display panel structures such as a backlight and display circuitry to create a touch-enabled display. If a metal mesh solution is used to fabricate the touch panel, the height difference between the metal mesh and the display panel structure can easily generate moiré patterns, affecting the aesthetics of the display. Therefore, the metal mesh pattern needs to be designed after the backlight, display circuitry, and other display panel structures are designed to achieve optical matching and reduce moiré patterns, resulting in a long design cycle.

[0003] Furthermore, the touch panel can be designed with a transparent ITO (Indium Tin Oxide) structure to reduce moiré patterns and avoid the long design cycle caused by the need for optical matching. The ITO structure consists of an emitter electrode layer and a receiver electrode layer, with an insulating layer between them. A touch capacitor is formed through the two electrodes and the insulating layer between them, allowing the touch panel to function by changing its capacitance value when touched. However, fabricating the emitter and receiver electrode layers requires numerous processing steps, affecting fabrication efficiency. Moreover, the double electrode layers result in an excessively thick ITO structure, which still leads to moiré patterns. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a touch panel and a touch display screen to solve the technical problem of moiré pattern caused by the complex process and excessive thickness of the existing touch panel, thereby improving process efficiency and reducing moiré pattern.

[0005] This application mainly includes the following aspects: In a first aspect, embodiments of this application provide a touch panel, the touch panel including a touch electrode area, the touch electrode area including: at least one first electrode sequence, each first electrode sequence including a plurality of connected first touch electrodes arranged along a first direction; at least one second electrode sequence, coplanar with each first electrode sequence, each second electrode sequence including a plurality of second touch electrodes arranged along a second direction and spaced apart sequentially, the connected region between adjacent first touch electrodes in each first electrode sequence being located in the interval region between adjacent second touch electrodes; a plurality of connection structures, the connection structures being used to connect adjacent second touch electrodes in each second electrode sequence, the projected image corresponding to the connection structure at least partially overlapping the projected image corresponding to the connected region, the projected image referring to an image obtained by projecting vertically onto a horizontal plane; and a plurality of insulating structures, each insulating structure being disposed at the overlap of the projected image between the connection structure and the connected region.

[0006] Optionally, for adjacent first and second touch electrodes, the boundary shape of the preset boundary of the first touch electrode and the preset boundary of the second touch electrode is used to change the electrode spacing to adjust the touch capacitance value. The touch capacitance value refers to the capacitance value of the touch capacitance formed between the adjacent first and second touch electrodes. The preset boundary refers to the boundary in the third direction in the projection image of the target touch electrode. There is an angle between the third direction and the first direction, and an angle between the third direction and the second direction. The target touch electrode includes the first touch electrode or the second touch electrode.

[0007] Optionally, the boundary shape of the preset boundary of the target touch electrode increases the electrode spacing by recessing it into the interior of the target touch electrode.

[0008] Optionally, for each target touch electrode, the boundary shape of the target boundary of the target touch electrode is a non-smooth curved shape, wherein the target boundary refers to the boundary extending along the target direction in the projected image of the target touch electrode, the target touch electrode includes a first touch electrode or a second touch electrode, and the target direction includes a first direction corresponding to the first touch electrode or a second direction corresponding to the second touch electrode.

[0009] Optionally, the touch panel further includes: a bezel area located outside the touch electrode area; at least one first lead extending from one end of a first electrode sequence to the bezel area; and at least one second lead extending from one end of a second electrode sequence to the bezel area.

[0010] Optionally, the touch electrode area also includes multiple anti-reflective structures: wherein at least one anti-reflective structure is provided in a preset area between adjacent first electrode sequences and adjacent second electrode sequences, and each anti-reflective structure does not contact other anti-reflective structures and the target touch electrode.

[0011] Secondly, embodiments of this application also provide a touch display screen, which includes the touch panel in the first aspect or any possible implementation of the first aspect.

[0012] This application provides a touch panel and a touch display screen. The touch panel includes a touch electrode area, which includes: at least one first electrode sequence, each first electrode sequence including a plurality of connected first touch electrodes arranged along a first direction; at least one second electrode sequence, which is on the same plane as each first electrode sequence, each second electrode sequence including a plurality of second touch electrodes arranged along a second direction and spaced apart sequentially, the connected area between adjacent first touch electrodes in each first electrode sequence being located in the interval area between adjacent second touch electrodes; a plurality of connecting structures, which are used to connect adjacent second touch electrodes in each second electrode sequence, the projected image corresponding to the connecting structure at least partially overlaps with the projected image corresponding to the connected area, the projected image referring to the image obtained by projecting vertically onto a horizontal plane; and a plurality of insulating structures, each insulating structure being disposed at the overlap of the projected image between the connecting structure and the connected area. This application solves the technical problem of moiré patterns caused by the complex process and excessive thickness of existing touch panels, thereby improving process efficiency and reducing moiré patterns. The first touch electrode and the second touch electrode are arranged in a plane, and the connected area between adjacent first touch electrodes is located in the interval area between adjacent second touch electrodes. The first touch electrode and the second touch electrode are arranged in a cross-shaped manner, and the adjacent second touch electrodes are connected by a connecting structure. An insulating structure is set between the connecting structure and the connected area to form a touch capacitor.

[0013] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1A schematic diagram of the structure of a touch panel provided in an embodiment of this application is shown.

[0016] Figure 2 This illustration shows a schematic diagram of the first touch electrode and the second touch electrode provided in an embodiment of this application. Figure 1 .

[0017] Figure 3 This illustration shows a schematic diagram of the first touch electrode and the second touch electrode provided in an embodiment of this application. Figure 2 .

[0018] Figure 4 This illustration shows a schematic diagram of the first touch electrode and the second touch electrode provided in an embodiment of this application. Figure 3 .

[0019] Figure 5 A schematic diagram of the anti-reflection structure provided in an embodiment of this application is shown. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the drawings in this application are for illustrative and descriptive purposes only and are not intended to limit the scope of protection of this application. Furthermore, it should be understood that the schematic drawings are not drawn to scale. The flowcharts used in this application illustrate operations implemented according to some embodiments of this application. It should be understood that the operations in the flowcharts may not be implemented in sequence, and steps without logical contextual relationships may be reversed or implemented simultaneously. In addition, those skilled in the art, guided by the content of this application, may add one or more other operations to the flowcharts, or remove one or more operations from the flowcharts.

[0021] Furthermore, the described embodiments are merely some, not all, of the embodiments of this application. The components of the embodiments of this application described and illustrated herein can typically be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] In existing technologies, an insulating layer is placed between an emitter electrode layer (containing emitter electrodes) and a receiver electrode layer (containing receiver electrodes) to construct the touch capacitance of a touch panel. This requires fabricating one electrode layer first, then an insulating layer on top of that, and finally another electrode layer. This necessitates multiple electrode layer fabrications during the touch panel manufacturing process, leading to complex steps and reduced efficiency. Furthermore, multiple electrode layer fabrications result in an excessively thick touch panel, which can cause moiré patterns and negatively impact the panel's appearance.

[0023] Furthermore, the double-layered electrode structure results in a large facing area of ​​the electrode plates, leading to excessively high capacitance of the touch capacitor. The properties of indium tin oxide (ITO) also contribute to excessively high resistance. To optimize the performance of an active stylus, it is necessary to reduce the resistance of the touch electrodes and the capacitance of the touch capacitor. For example, conventional non-active pens require a touch electrode resistance of less than 60 ohms, while active pens require less than 20 ohms. Even with a touch electrode resistance of less than 20 ohms, the touch capacitor's capacitance remains relatively high. Consequently, the material and structural factors result in excessively high capacitance and resistance values, causing touch signal response delays and reduced signal-to-noise ratio, thus affecting the touch panel's sensitivity and further impacting the user experience.

[0024] Based on this, the present application provides a touch panel and a touch display screen. By arranging the first touch electrode and the second touch electrode in a plane, and the connecting area between adjacent first touch electrodes is located in the interval area between adjacent second touch electrodes, the first touch electrodes and the second touch electrodes are arranged in a cross pattern. Adjacent second touch electrodes are connected by a connecting structure, and an insulating structure is provided between the connecting structure and the connecting area to form a touch capacitor. This solves the technical problem of moiré patterns caused by the complex manufacturing process and excessive thickness of existing touch panels, achieving the technical effect of improving process efficiency and reducing moiré patterns. Specifically, as follows: Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a touch panel provided in an embodiment of this application. Figure 1 As shown, the touch panel includes a touch electrode area 10, which includes: at least one first electrode sequence 101, each first electrode sequence including a plurality of connected first touch electrodes 1011 arranged along a first direction (direction a); and at least one second electrode sequence 102, which is on the same plane as each first electrode sequence, each second electrode sequence including a plurality of second touch electrodes 1021 arranged along a second direction (direction b) and spaced apart sequentially, wherein the connected area between adjacent first touch electrodes in each first electrode sequence is located in the interval area between adjacent second touch electrodes.

[0025] Since the connected region between adjacent first touch electrodes is located in the interval region between adjacent second touch electrodes, the first electrode sequence and the second electrode sequence intersect in the connected region and the interval region, that is, the first direction and the second direction intersect in the connected region and the interval region.

[0026] For example, from a top-down view of the touch electrode area, at least one first electrode sequence is arranged in a column, meaning multiple first touch electrodes are arranged in a column; at least one second electrode sequence is arranged in a row, meaning multiple second touch electrodes are arranged in a row. Furthermore, each first touch electrode and each second touch electrode is arranged in an array within the touch electrode area, with the first direction being vertical and the second direction being horizontal, the first direction being perpendicular to the second direction.

[0027] In this configuration, at least one first electrode sequence and at least one second electrode sequence are disposed within the same touch electrode layer. The thickness of each first touch electrode and each second touch electrode is approximately the same in the vertical direction, meaning that there is no height difference between the first touch electrode and the second touch electrode in the vertical direction. The vertical direction refers to the direction perpendicular to the horizontal plane, and the horizontal plane refers to the plane containing the first direction and the second direction.

[0028] For example, the projected image of the first touch electrode and the projected image of the second touch electrode have the same shape, and the projected image of the first touch electrode and the projected image of the second touch electrode do not overlap. The projected image refers to the image obtained by projecting vertically onto the horizontal plane.

[0029] like Figure 1 As shown, the touch electrode area 10 also includes: a plurality of connection structures 1022, which are used to connect adjacent second touch electrodes in each second electrode sequence, wherein the projection image corresponding to the connection structure and the projection image corresponding to the connected area at least partially overlap, and the projection image refers to the image obtained by projecting vertically onto the horizontal plane; and a plurality of insulating structures 103, each of which is disposed at the overlap of the projection image between the connection structure and the connected area.

[0030] In this configuration, the vertical sides of adjacent second touch electrodes do not directly contact each other. The vertical side refers to the side of the second touch electrode that is closest to its adjacent second touch electrode. Furthermore, the connected area is located between the closest vertical sides of adjacent second touch electrodes.

[0031] In this design, a connection structure 1022 is provided between adjacent second touch electrodes to connect adjacent second touch electrodes. That is, adjacent second touch electrodes are connected through the connection structure rather than through direct contact.

[0032] Since the first electrode sequence and the second electrode sequence intersect in the connected region and the interval region, the projected image of the connecting structure projected vertically onto the horizontal plane at least partially overlaps with the projected image of the connected region projected vertically onto the horizontal plane. Therefore, an intersection between the first direction and the second direction corresponds to a connected region between adjacent first touch electrodes, an interval region between adjacent second touch electrodes, and a connecting structure connecting the adjacent second touch electrodes.

[0033] Furthermore, in order to form a touch capacitor between the first touch electrode and the second touch electrode, insulation treatment is required between the first touch electrode and the second touch electrode so that the connected areas on each first electrode sequence are cross-insulated from the connection structures on the corresponding second electrode sequence.

[0034] For example, such as Figure 1 As shown, an insulating structure 103 is provided between a connected region and its corresponding connecting structure. That is, the insulating structure is located between the connected region and the connecting structure in the vertical direction. The insulating structure prevents direct contact between the first touch electrode and the second touch electrode, so as to construct a touch capacitor through the first touch electrode, the insulating structure and the second touch electrode.

[0035] Furthermore, the length of the connecting structure 1022 in the first direction should not be greater than the length of the insulating structure in the first direction, so that the insulating structure can isolate the connecting structure and the connected area; the length of the connecting structure 1022 in the second direction should not be less than the length of the spacing area between adjacent second touch electrodes in the second direction, so that the connecting structure can connect adjacent second touch electrodes. Thus, the first electrode sequence and the second electrode sequence can each achieve conduction.

[0036] Specifically, for the adjacent first and second touch electrodes, the boundary shape of the preset boundary of the first touch electrode and the preset boundary of the second touch electrode is used to change the electrode spacing to adjust the touch capacitance value. The touch capacitance value refers to the capacitance value of the touch capacitance formed between the adjacent first and second touch electrodes. The preset boundary refers to the boundary in the third direction in the projection image of the target touch electrode. There is an angle between the third direction and the first direction, and an angle between the third direction and the second direction. The target touch electrode includes the first touch electrode or the second touch electrode.

[0037] In other words, the connecting regions between two adjacent first touch electrodes and the connecting structures between two adjacent second touch electrodes are intersected, and the connecting regions and connecting structures are insulated from each other by an insulating structure. Furthermore, for each first touch electrode, the intersecting and insulated connecting structures of the connecting regions of that first touch electrode are determined, and the two second touch electrodes connected by the connecting structures are adjacent to the first touch electrode. For each second touch electrode, the intersecting and insulated connecting regions corresponding to the connecting structures connected to that second touch electrode are determined, and the two first touch electrodes located on either side of the connecting regions are adjacent to the second touch electrode.

[0038] Specifically, for each pair of adjacent first and second touch electrodes, the distance between the preset boundaries of the first and second touch electrodes affects the electrode spacing of the touch capacitor. Therefore, it is necessary to change the boundary shape of the preset boundaries to adjust the electrode spacing of the touch capacitor, thereby adjusting the capacitance value. Since an excessively large electrode spacing will affect the sensing amount of the signal channel, while an excessively small electrode spacing will reduce the capacitance value, the electrode spacing is generally set between 150 micrometers and 300 micrometers.

[0039] Specifically, the thickness of the connecting structure in the vertical direction is used to change the first resistance value of the connecting structure, and the thickness of the target touch electrode in the vertical direction is used to change the second resistance value of the target touch electrode. The difference between the thickness of the target touch electrode and the thickness of the connecting structure satisfies a preset resistance difference condition.

[0040] For example, the first touch electrode, the second touch electrode, and the connecting structure are all made of indium tin oxide (ITO), and the thickness of the ITO affects the resistance values ​​of the first touch electrode, the second touch electrode, and the connecting structure. Furthermore, to prevent moiré patterns caused by the height difference between the first touch electrode, the second touch electrode, and the connecting structure, and to prevent the resistance difference caused by the height difference from affecting electron flow, the thicknesses of the first touch electrode, the second touch electrode, and the connecting structure need to be approximately equal in the vertical direction. This achieves both improved aesthetics and ensured current transmission. Since the first and second touch electrodes are fabricated using the same ITO layer, their thicknesses are identical. The preset resistance difference condition means that the thickness difference between the target touch electrode and the connecting structure will not significantly affect electron flow or cause moiré patterns.

[0041] For example, the resistance values ​​of the first touch electrode and the second touch electrode are generally controlled at 20 ohms or less, and the resistance value of the connection structure should also be close to the resistance values ​​of the first touch electrode and the second touch electrode, so that the resistance values ​​of the first touch electrode, the second touch electrode and the connection structure are approximately the same.

[0042] Please see Figure 2 , Figure 2 A schematic diagram of the first and second touch electrodes provided in the embodiments of this application. Figure 1 .like Figure 2 As shown, a first touch electrode 2011 and another first touch electrode 2012 are adjacent to each other, and a second touch electrode 2021 and another first touch electrode 2012 are adjacent to each other. The first touch electrode 2011 and the other first touch electrode 2012 are connected, and there is a gap between the second touch electrode 2021 and the other first touch electrode 2012. The connecting area between the first touch electrode 2011 and the other first touch electrode 2012 is located within the gap between the second touch electrode 2021 and the other first touch electrode 2012.

[0043] like Figure 2 As shown, the adjacent first touch electrode and second touch electrode refer to the closest first touch electrode and second touch electrode. For example, first touch electrode 2011 and second touch electrode 2021 are a group of adjacent first touch electrodes and second touch electrodes, first touch electrode 2011 and second touch electrode 2022 are adjacent first touch electrodes and second touch electrodes, first touch electrode 2012 and second touch electrode 2021 are a group of adjacent first touch electrodes and second touch electrodes, and first touch electrode 2012 and second touch electrode 2022 are adjacent first touch electrodes and second touch electrodes.

[0044] The capacitance value of the touch capacitor is calculated using the following formula: (1) In formula (1), d is the dielectric constant, which depends on the dielectric material between the capacitor plates; S is the area of ​​the plates facing each other; d is the distance between the plates; k is the electrostatic constant, usually taken as... The unit is (Newtons × square meters / coulombs squared).

[0045] like Figure 2As shown, the facing area of ​​the electrode plate depends on the width and number of channels of the touch electrode. The width L of the target touch electrode refers to the width perpendicular to the target direction. The target touch electrode includes a first touch electrode or a second touch electrode, and the target direction includes a first direction corresponding to the first touch electrode or a second direction corresponding to the second touch electrode. That is, the channel width of the first touch electrode refers to the width perpendicular to the first direction or the width in the second direction, and the channel width of the second touch electrode refers to the width perpendicular to the second direction or the width in the first direction. The number of channels refers to the sum of half the number of the first electrode sequence and half the number of the second electrode sequence. Furthermore, when the number of the first electrode sequence and the number of the second electrode sequence do not change, the adjustable range of the touch electrode width is very small, generally between 17-23 micrometers (μm), resulting in a very small adjustable range of the facing area of ​​the electrode plate, which can be ignored. Therefore, the facing area of ​​the electrode plate can also be understood as a fixed value. Furthermore, in terms of dielectric constant... When the electrostatic constant k and the area S of the plates are both fixed, the only way to reduce the capacitance of the touch capacitor is to increase the distance between the plates.

[0046] like Figure 2 As shown, taking the adjacent first touch electrode 2011 and second touch electrode 2022 as an example, the distance between the first touch electrode and the second touch electrode in a third direction (direction c) is increased by changing the boundary shape of the preset boundary B1 of the first touch electrode and the preset boundary B2 of the second touch electrode, thereby increasing the plate spacing d of the touch capacitor. The third direction is located between the adjacent first touch electrode and the second touch electrode, and can point from the connection structure between the first direction and the second direction to a position away from the connection structure, and the third direction has an angle with both the first direction and the second direction.

[0047] For example, Figure 1 The preset distance between the preset boundary of the first touch electrode and the preset boundary of the second touch electrode is uniformly set. Figure 2 The spacing between the preset boundary B1 of the first touch electrode and the preset boundary B2 of the second touch electrode gradually increases along a third direction from the point closer to the connecting structure to the point farther away from the connecting structure. Furthermore, the electrode spacing can be increased by making the spacing between the preset boundaries of the first and second touch electrodes non-uniform.

[0048] Specifically, the boundary shape of the preset boundary of the target touch electrode increases the electrode spacing by recessing it into the interior of the target touch electrode.

[0049] Please see Figure 3 , Figure 3A schematic diagram of the first and second touch electrodes provided in the embodiments of this application. Figure 2 .like Figure 3 As shown, for the first touch electrode 301 and its adjacent second touch electrode 302, along a third direction from near the connecting structure to far from the connecting structure, the distance between the first touch electrode and the second touch electrode first gradually increases and then gradually decreases. Furthermore, the first touch electrode and the second touch electrode increase the electrode spacing d by folding the preset boundary inwards to make the boundary shape of the preset boundary recessed towards the interior of the touch electrode. Since an overly regular boundary shape of the projected image of the touch electrode can cause moiré patterns, the moiré pattern caused by an overly regular boundary shape is prevented by limiting the inward recess of the preset boundary.

[0050] For example, according to Figure 3 The touch electrodes shown are simulated using software, predicting a capacitance of approximately 220 picofarads (pF). Figure 1 The simulated touch capacitor of the touch electrode scheme shown has a capacitance value of about 250pF. The inward concavity of the preset boundary can reduce the capacitance value by about 15%, thereby improving the touch effect of the active pen.

[0051] Specifically, for each target touch electrode, the boundary shape of the target boundary of the target touch electrode is a non-smooth curved shape. The target boundary refers to the boundary extending along the target direction in the projected image of the target touch electrode. The target touch electrode includes a first touch electrode or a second touch electrode, and the target direction includes a first direction corresponding to the first touch electrode or a second direction corresponding to the second touch electrode.

[0052] In other words, the target boundaries of the first and second touch electrodes, corresponding to the sides perpendicular to the horizontal plane, include multiple sub-sides that are connected sequentially and are not on the same plane. Therefore, when the first and second touch electrodes are projected onto the horizontal plane, the shape of the target boundary of the projected image is a non-smooth, zigzag line.

[0053] Please see Figure 4 , Figure 4 A schematic diagram of the first and second touch electrodes provided in the embodiments of this application. Figure 3 .like Figure 4As shown, for the first touch electrode 401, the target boundary A1 extending along the first direction in the projected image of the first touch electrode includes multiple edges that are not on the same straight line but are connected sequentially. For the second touch electrode 402, the target boundary A2 extending along the second direction in the projected image of the second touch electrode includes multiple edges that are not on the same straight line but are connected sequentially. Furthermore, by restricting the target boundary to a non-smooth, zigzag boundary shape, moiré patterns caused by an overly regular boundary shape of the target boundary are prevented.

[0054] Furthermore, this application reduces moiré patterns by setting the boundary shape of the projected image of the touch electrode. Specifically, this is achieved by limiting the boundary shape of the preset boundary and / or limiting the boundary shape of the target boundary, thereby ensuring the aesthetics of the touch panel.

[0055] Specifically, the touch electrode area also includes multiple anti-reflective structures: at least one anti-reflective structure is provided in a preset area between adjacent first electrode sequences and adjacent second electrode sequences, and each anti-reflective structure does not contact other anti-reflective structures and target touch electrodes.

[0056] In other words, the overlapping area between a first electrode sequence and its adjacent first electrode sequence and the area between a second electrode sequence and its adjacent second electrode sequence is defined as a preset area. This preset area is surrounded by two parallel adjacent first touch electrodes and two parallel adjacent second touch electrodes, thus forming a region enclosed by four touch electrodes. Furthermore, at least one anti-reflective structure is provided within the preset area. The anti-reflective structures within the preset area do not contact each other, nor do they contact the first or second touch electrodes. If only the target touch electrode is provided in the touch electrode area, the difference in reflectivity between the target and non-target touch electrode areas may make the touch electrode pattern visible to the naked eye. Therefore, multiple anti-reflective structures are designed to prevent the touch electrode pattern from being visible to the naked eye.

[0057] Please see Figure 5 , Figure 5 This is a schematic diagram of the anti-reflective structure provided in an embodiment of this application. Figure 5As shown, the preset area refers to the region enclosed by a first touch electrode 5011 and its parallel adjacent first touch electrode 5012, and a second touch electrode 5021 and its parallel adjacent second touch electrode 5022. Multiple anti-reflective structures 503 are provided within the preset area. Furthermore, when multiple first electrode sequences and multiple second electrode sequences are provided in the touch electrode area, the touch electrode area includes multiple preset areas, and each preset area is provided with multiple anti-reflective structures 503. Moreover, the boundary shape of the projected image of the anti-reflective structure can be set to be irregular, and the boundary shape of the projected image of the anti-reflective structure can be formed by inwardly concave and / or outwardly protruding boundaries. Thus, the possibility of the touch electrode pattern being visible from the outside is further reduced by using anti-reflective structures with irregular boundary shapes.

[0058] The touch panel further includes: a frame area located outside the touch electrode area; at least one first lead, which extends from one end of a first electrode sequence to the frame area; and at least one second lead, which extends from one end of a second electrode sequence to the frame area.

[0059] For example, return Figure 1 The border area 20 surrounds the touch electrode area, and a first lead 1012 is led out from one side of each first electrode sequence 101 to the touch electrode area. A second lead 1023 is led out from one side of each second electrode sequence 102 to the touch electrode area.

[0060] In other words, the border area is located outside at least one side of the touch electrode area. That is, when the touch electrode area is polygonal, the border area can be located on one side of the touch electrode area, outside multiple sides of the touch electrode area, or it can surround the touch electrode area. Furthermore, the first lead from each first electrode sequence and the second lead from each second electrode sequence extend to the border area to provide different level signals to the first and second leads respectively, which facilitates the determination of the change in capacitance value of the touch electrode before and after active pen click.

[0061] Based on the same concept, this application also provides a preparation method corresponding to the touch panel provided in the above embodiments. Since the principle of the preparation method of the touch panel in this application is similar to that of the touch panel in the above embodiments of this application, the implementation of the preparation method can refer to the implementation of the touch panel, and the repeated parts will not be described again.

[0062] Specifically, the preparation method provided in this application embodiment is used to prepare the touch panel provided in the above embodiment. The preparation method includes: S101: A connection structure layer is formed by depositing a film on the initial substrate, and then photolithography is performed on the connection structure layer to form multiple connection structures to obtain the first intermediate substrate.

[0063] The multiple connecting structures are arranged at the intersection of the first and second directions, and the connecting structures do not contact each other.

[0064] The material of the connecting structure layer is indium tin oxide. After depositing a layer of indium tin oxide, photoresist (OC adhesive) is applied to the coating. Then, a photomask containing the connecting structure pattern is placed on the coating. The connecting structure pattern on the photomask is transferred to the coating by light. Finally, the part of the coating except for the connecting structure pattern is washed away by etching solution, thereby generating multiple connecting structures, and each connecting structure is isolated from each other.

[0065] Specifically, since the connection structure is used to connect two adjacent second touch electrodes on the second electrode sequence and overlaps with the connected area between two adjacent second touch electrodes on the first electrode sequence, each connection structure should be located at the intersection of the first direction and the second direction, that is, at the intersection between two adjacent second touch electrodes.

[0066] Specifically, the initial substrate is obtained by coating a first insulating layer on a glass substrate, and then performing photolithography on the first insulating layer to form a border region to obtain a first insulating substrate; coating a first planarization layer on the first insulating substrate; and coating a first anti-reflection layer on the first planarization layer to obtain the initial substrate.

[0067] For example, a photoresist layer should first be coated onto the glass substrate to form a first insulating layer. Then, a photomask containing a border area pattern is placed on the first insulating layer and illuminated. Finally, the portion of the first insulating layer except for the border area pattern is washed away with an etching solution to form a border area on the glass substrate, thereby generating the first insulating substrate. In this application, the border area is generally a black border area (BM area) to block the circuit traces of the first and second leads and prevent the first and second leads from being visible from the appearance of the touch panel.

[0068] Subsequently, after generating the first insulating substrate, photoresist is coated onto the first insulating substrate paper to form a first planarization layer. Then, an inorganic material (e.g., silicon dioxide and / or silicon nitride) is coated onto the first planarization layer to form a first anti-reflection layer, thus obtaining the initial substrate. In this way, a connection structure layer can be deposited on the first anti-reflection layer of the initial substrate to generate multiple connection structures. The first planarization layer serves to provide planarization and insulation, while the first anti-reflection layer reduces the intensity of reflected light, preventing patterns and traces from being visible and increasing visual consistency.

[0069] S102: An insulating structure layer is coated on the first intermediate substrate to form an insulating structure layer, and then photolithography is performed on the insulating structure layer to form multiple insulating structures to obtain a second intermediate substrate.

[0070] In this configuration, one connecting structure corresponds to one insulating structure. The length of the insulating structure in the second direction is less than the length of the connecting structure in the second direction, while the length of the insulating structure in the first direction should not be less than the length of the connecting structure in the first direction.

[0071] In other words, photoresist is coated on a first intermediate substrate that forms multiple connection structures, and then a photomask containing an insulating structure pattern is placed on the photoresist and illuminated. Finally, the part of the insulating structure layer other than the insulating structure is washed away by an etching solution to generate multiple insulating structures, with one insulating structure corresponding to one connection structure. In this way, the insulating structure is used as the intermediate medium of the touch capacitor.

[0072] S103: A touch electrode layer is formed by depositing a film on the second intermediate substrate, and then photolithography is performed on the touch electrode layer to generate at least one first electrode sequence and at least one second electrode sequence.

[0073] An insulating structure is located between a connecting structure and a connected region to form the touch electrode area of ​​the touch panel.

[0074] The thickness of the connection structure layer formed by the coating should be consistent with the thickness of the touch electrode layer, so as to control the thickness of the connection structure, the first touch electrode and the second touch electrode to be consistent.

[0075] For example, the material of the touch electrode layer is indium tin oxide. After depositing a layer of indium tin oxide on the second intermediate substrate, photoresist is applied to the coating, and a photomask containing the touch electrode pattern is placed on the coating. The touch electrode pattern on the photomask is transferred to the coating by illumination. Finally, the part of the coating except for the touch electrode pattern is washed away by etching solution, thereby generating at least one first electrode sequence and at least one second electrode sequence, and the first electrode sequence and the second electrode sequence do not contact each other.

[0076] The fabrication method further includes: while performing photolithography on the touch electrode layer to generate at least one first electrode sequence and at least one second electrode sequence, photolithography is performed in a preset area between adjacent first electrode sequences and adjacent second electrode sequences to form at least one anti-reflection structure, wherein each anti-reflection structure does not contact other anti-reflection structures and the target touch electrode.

[0077] In other words, an anti-reflective structure pattern is also provided on the photomask containing the touch electrode pattern. Then, the photomask is placed on the touch electrode layer formed by the coating, and photoresist is coated and illuminated. This will transfer the patterns corresponding to the anti-reflective structure, the first touch electrode, and the second touch electrode onto the touch electrode layer. Finally, the part of the touch electrode layer except for the anti-reflective structure, the first touch electrode, and the second touch electrode is washed away by the etching solution, thereby generating the anti-reflective structure, at least one first electrode sequence, and at least one second electrode sequence. Thus, the first touch electrode and the second touch electrode can be generated simultaneously by one coating, without the need to perform separate coatings to generate the first touch electrode and the second touch electrode. This simplifies the production steps and controls the first touch electrode and the second touch electrode to be on the same plane, thereby reducing moiré patterns by reducing the height difference.

[0078] Specifically, the preparation method further includes: depositing a metal layer on the touch electrode layer, then performing photolithography on the metal layer to draw a first lead at one end of each first electrode sequence and a second lead at one end of each second electrode sequence, with both the first and second leads extending to the frame area to obtain a substrate to be insulated; coating a second anti-reflection layer on the substrate to be insulated; and coating a second planarization layer on the second anti-reflection layer to prepare a touch panel.

[0079] In other words, after generating the anti-reflective structure, the first touch electrode, and the second touch electrode, a metal layer is deposited on the touch electrode layer, and then a photoresist layer is coated. A photomask containing the first lead pattern and the second lead pattern is placed on the photoresist and illuminated. The parts outside the first lead pattern and the second lead pattern are removed by etching solution. A first lead is drawn from a first electrode sequence and extends to the border area, and a second lead is drawn from a second electrode sequence and extends to the border area to generate the first lead and the second lead.

[0080] Furthermore, an inorganic material (such as silicon dioxide and / or silicon nitride) is coated onto the substrate to be insulated after the first and second leads are formed to serve as a second anti-reflection layer. A photoresist layer is then coated on top of the second anti-reflection layer to form a second planarization layer, thereby fabricating a touch panel. The second anti-reflection layer reduces the intensity of reflected light, preventing patterns and traces from being visible and increasing appearance consistency. The second planarization layer serves both planarization and insulation purposes.

[0081] Based on the same application concept, this application also provides a touch display screen corresponding to the touch panel provided in the above embodiments. Since the principle of the touch display screen in this application is similar to that of the touch panel in the above embodiments of this application, the implementation of the touch display screen can refer to the implementation of the touch panel, and the repeated parts will not be described again.

[0082] For example, the touch display screen includes the touch panel provided in the above embodiments, thereby assembling the touch panel and other devices of the touch display screen to manufacture the touch display screen, and the touch display screen has touch functionality.

[0083] Furthermore, by controlling the first and second touch electrodes on a single horizontal plane, this application reduces process steps, improves fabrication efficiency, and reduces moiré patterns. Additionally, by designing the boundary shape of the first and second touch electrodes, it reduces reflected light intensity, preventing the touch electrode patterns from being visible to the naked eye and increasing appearance consistency. Moreover, the solution presented in this application is applicable to both active pen protocols and passive pen protocols with large click areas.

[0084] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0085] It should also be noted that, unless otherwise explicitly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0086] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A touch panel, characterized in that, The touch panel includes a touch electrode area, which includes: At least one first electrode sequence, each first electrode sequence comprising a plurality of connected first touch electrodes arranged along a first direction; At least one second electrode sequence is in the same plane as each first electrode sequence. Each second electrode sequence includes a plurality of second touch electrodes arranged along a second direction and spaced apart sequentially. The connected region between adjacent first touch electrodes in each first electrode sequence is located in the interval region between adjacent second touch electrodes. Multiple connection structures are provided, wherein the connection structures are used to connect adjacent second touch electrodes in each second electrode sequence, and the projection image corresponding to the connection structure at least partially overlaps with the projection image corresponding to the connected region, wherein the projection image refers to the image obtained by projecting vertically onto the horizontal plane; Multiple insulating structures, each disposed at the point where the projected image between the connecting structure and the connected region overlaps.

2. The touch panel according to claim 1, characterized in that, For adjacent first and second touch electrodes, the boundary shapes of the preset boundaries of the first and second touch electrodes are used to change the electrode spacing to adjust the touch capacitance value. The touch capacitance value refers to the capacitance value of the touch capacitance formed between the adjacent first and second touch electrodes. The preset boundary refers to the boundary in the third direction in the projected image of the target touch electrode, wherein there is an angle between the third direction and the first direction, and an angle between the third direction and the second direction, and the target touch electrode includes the first touch electrode or the second touch electrode.

3. The touch panel according to claim 2, characterized in that, The boundary shape of the preset boundary of the target touch electrode increases the electrode spacing by recessing it into the interior of the target touch electrode.

4. The touch panel according to claim 1, characterized in that, For each target touch electrode, the boundary shape of the target boundary of the target touch electrode is a non-smooth, bent shape. The target boundary refers to the boundary extending along the target direction in the projected image of the target touch electrode, the target touch electrode includes the first touch electrode or the second touch electrode, and the target direction includes the first direction corresponding to the first touch electrode or the second direction corresponding to the second touch electrode.

5. The touch panel according to claim 1, characterized in that, The touch panel also includes: The border area is located outside the touch electrode area; At least one first lead, which extends from one end of one of the first electrode sequences and extends to the border region; At least one second lead, which extends from one end of one of the second electrode sequences and extends into the border region.

6. The touch panel according to claim 1, characterized in that, The touch electrode area also includes multiple anti-reflective structures: At least one anti-reflective structure is provided in a preset area between adjacent first electrode sequences and adjacent second electrode sequences, and each anti-reflective structure does not contact other anti-reflective structures and target touch electrodes.

7. The touch panel according to claim 1, characterized in that, The thickness of the connection structure in the vertical direction is used to change the first resistance value of the connection structure, and the thickness of the target touch electrode in the vertical direction is used to change the second resistance value of the target touch electrode. The difference between the thickness of the target touch electrode and the thickness of the connection structure satisfies a preset resistance difference condition.

8. The touch panel according to claim 1, characterized in that, The connection structure, the first touch electrode, and the second touch electrode are made of indium tin oxide.

9. The touch panel according to claim 2, characterized in that, The electrode spacing is set between 150 micrometers and 300 micrometers.

10. A touch display screen, characterized in that, The touch display screen includes a touch panel as described in any one of claims 1 to 9.

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