WO2021244202A1 - 触控显示面板及其制备方法、触控显示装置 - Google Patents

触控显示面板及其制备方法、触控显示装置 Download PDF

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Publication number
WO2021244202A1
WO2021244202A1 PCT/CN2021/091745 CN2021091745W WO2021244202A1 WO 2021244202 A1 WO2021244202 A1 WO 2021244202A1 CN 2021091745 W CN2021091745 W CN 2021091745W WO 2021244202 A1 WO2021244202 A1 WO 2021244202A1
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Prior art keywords
electrode
compensation electrode
compensation
metal layer
sub
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PCT/CN2021/091745
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English (en)
French (fr)
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樊聪
何帆
仝可蒙
董向丹
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京东方科技集团股份有限公司
成都京东方光电科技有限公司
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Priority to US17/629,793 priority Critical patent/US11960689B2/en
Publication of WO2021244202A1 publication Critical patent/WO2021244202A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04111—Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate

Definitions

  • the embodiments of the present disclosure relate to, but are not limited to, the field of display technology, and in particular to a touch display panel, a manufacturing method thereof, and a touch display device.
  • the touch screen can be divided into: capacitive, resistive, infrared, surface acoustic wave, electromagnetic, vibration wave induction, and frustrated total internal reflection optical induction, etc.
  • the capacitive touch screen is widely used in various electronic interactive scene equipment with its unique touch principle, with the advantages of high sensitivity, long life, high light transmittance, and the like.
  • some display panels use in-screen digging technology, that is, a digging area for placing front-facing cameras and other hardware in the effective display area.
  • this technology destroys the uniformity of touch performance in the entire effective display area and reduces the touch performance.
  • the embodiment of the present disclosure provides a touch display panel, which includes a substrate, a first metal layer disposed on the substrate, an insulating layer disposed on a side of the first metal layer away from the substrate, and a first metal layer disposed on the insulating layer away from the first metal layer.
  • one of the first metal layer and the second metal layer includes a plurality of connecting bridges
  • the other layer includes a first electrode, a second electrode and a through hole
  • the first The electrode includes a plurality of first sub-electrodes arranged in a first direction, and adjacent first sub-electrodes are bridged by connecting bridges
  • the second electrode includes a plurality of second sub-electrodes arranged in a second direction, and In the second direction, two adjacent second sub-electrodes are connected to each other;
  • the through hole penetrates the first sub-electrode and the second sub-electrode; at least one of the first metal layer and the second metal layer
  • the layer further includes a compensation electrode surrounding the through hole, the compensation electrode includes a first compensation electrode and a second compensation electrode, the surface adjacent to the first compensation electrode and the second compensation electrode is a first end surface, so The surface of the second compensation electrode adjacent to the first compensation electrode is a second end surface, the structures of the first end surface and
  • the arrangement positions of the first compensation electrode and the second compensation electrode include at least one of the following:
  • the first compensation electrode and the second compensation electrode are both arranged on the first metal layer;
  • the first compensation electrode and the second compensation electrode are both arranged on the second metal layer;
  • One of the first compensation electrode and the second compensation electrode is arranged on the first metal layer, and the other is arranged on the second metal layer.
  • the first end surface and the second end surface are curved or sloped.
  • the first end surface includes one or more first protrusions and one or more first spacers
  • the second end surface includes one or more second protrusions and one Or a plurality of second spacers
  • the first protruding part is located in the second spacer
  • the second protruding part is located in the first spacer
  • the first end surface includes one or more first protrusions
  • the second end surface includes one or more second protrusions
  • the first protrusions and the The second protrusions are arranged at intervals.
  • the first compensation electrode includes N first compensation sub-electrodes, wherein M first compensation sub-electrodes are connected to the first sub-electrodes, and (NM) first compensation sub-electrodes It is insulated from the first and second sub-electrodes, M is a natural number less than or equal to N, and N is a natural number greater than 1.
  • the second compensation electrode includes n pieces of second compensation sub-electrodes, wherein m pieces of second compensation sub-electrodes are connected to the second sub-electrodes, and (nm) pieces of second compensation sub-electrodes It is insulated from the first sub-electrode and the second sub-electrode, m is a natural number less than or equal to n, and n is a natural number greater than 1.
  • the embodiment of the present disclosure also provides a touch display device, including the aforementioned touch display panel.
  • the embodiment of the present disclosure also provides a method for manufacturing a touch display panel, including: forming a first metal layer on a substrate; forming an insulating layer on a side of the first metal layer away from the substrate; and forming an insulating layer on the insulating layer away from the first metal layer
  • a second metal layer is formed on one side of the first metal layer, one of the first metal layer and the second metal layer includes a plurality of connecting bridges, the other layer includes a first electrode, a second electrode and a through hole, the first The electrode includes a plurality of first sub-electrodes arranged in a first direction, and adjacent first sub-electrodes are bridged by the connecting bridge; the second electrode includes a plurality of second sub-electrodes arranged in a second direction, And in the second direction, two adjacent second sub-electrodes are connected to each other; at least one of the first metal layer and the second metal layer further includes a compensation electrode surrounding the through hole, and the compensation The electrode includes a
  • the arrangement positions of the first compensation electrode and the second compensation electrode include any one of the following:
  • the first compensation electrode and the second compensation electrode are both arranged on the first metal layer;
  • the first compensation electrode and the second compensation electrode are both arranged on the second metal layer;
  • One of the first compensation electrode and the second compensation electrode is provided on the first metal layer, and the other is provided on the second metal layer.
  • FIG. 1 is a schematic diagram of the structure of a touch display panel in some technologies
  • FIG. 2 is a schematic structural diagram of a touch display panel according to an embodiment of the disclosure.
  • FIG. 3 is a schematic diagram of a cross-sectional structure of the touch display panel in FIG. 2 along the BB direction;
  • FIG. 4 is a schematic structural diagram of another touch display panel according to an embodiment of the disclosure.
  • FIG. 5 is a schematic diagram of a cross-sectional structure of the touch display panel in FIG. 4 along the BB direction;
  • FIG. 6 is a schematic structural diagram of a compensation electrode according to an embodiment of the disclosure.
  • FIG. 7 is a schematic diagram of a substrate after forming a first metal layer pattern according to an embodiment of the disclosure.
  • FIG. 8 is a schematic diagram of a substrate after forming an insulating layer pattern according to an embodiment of the disclosure.
  • FIG. 9 is a schematic flowchart of a manufacturing method of a touch display panel according to an embodiment of the disclosure.
  • the touch chip (Touch IC) algorithmically compensates the part of the touch electrode (Sensor) whose integrity has been slightly damaged, this compensation is also based on sacrificing other properties of the Touch IC (such as power consumption, etc.). ), and its algorithm compensation is also limited. Because the sensor unit in the mounting hole area of the effective display area is lacking more serious, it is necessary to achieve the complete sensor unit touch performance of the Senor unit in the mounting hole area of the effective display area and other touch areas. The uniformity of is almost impossible.
  • the embodiments of the present disclosure provide a touch display panel, a manufacturing method thereof, and a touch display device, which can improve the uniformity of touch performance in the entire effective display area.
  • the parameters such as the mutual capacitance induction (Delta Cm) of the touch electrode in the mounting hole area of the effective display area are adjusted, so that the mounting hole area of the effective display area is not complete.
  • the performance parameters are consistent with the electrical parameters of the complete Sensor unit, thereby ensuring the uniformity of the touch performance of the entire touch display panel.
  • the embodiment of the present disclosure provides a touch display panel, which includes a substrate, a first metal layer disposed on the substrate, an insulating layer disposed on a side of the first metal layer away from the substrate, and an insulating layer disposed away from the insulating layer.
  • the second metal layer on one side of the first metal layer wherein: one of the first metal layer and the second metal layer includes a plurality of connecting bridges, and the other layer of the first metal layer and the second metal layer includes the first metal layer
  • An electrode, a second electrode and a through hole, the first electrode and the second electrode are arranged to cross each other, the first electrode includes a plurality of first sub-electrodes arranged in a first direction, and a connecting bridge is passed between adjacent first sub-electrodes Bridge;
  • the second electrode includes a plurality of second sub-electrodes arranged along the second direction, and in the second direction, the two adjacent second sub-electrodes are connected to each other;
  • the through hole penetrates the first sub-electrode and the second sub-electrode Electrode; at least one of the first metal layer and the second metal layer also includes a compensation electrode surrounding the through hole, the compensation electrode includes a first compensation electrode and a second compensation electrode, the first compensation electrode and the second compensation electrode
  • the first compensation electrode and the second compensation electrode are arranged at the position surrounding the through hole, and the first end surface of the first compensation electrode (that is, the first compensation electrode and the second compensation electrode are opposite to each other). Adjacent surface) and the second end surface of the second compensation electrode (that is, the surface adjacent to the first compensation electrode) of the second compensation electrode, and the length of the outer contour of the first end surface or the second end surface is greater than that of the first compensation electrode.
  • the thickness of the electrode or the second compensation electrode along the center line of the through hole increases the mutual sensing area of the incomplete touch electrodes, increases the sensing capacitance at the incomplete touch electrodes, and improves the touch performance of the entire effective display area. Uniformity.
  • the touch display panel of this embodiment includes a substrate 10, a first metal layer disposed on the substrate 10, and a first metal layer disposed on the The insulating layer 30 on a side of a metal layer away from the substrate 10 and a second metal layer disposed on the side of the insulating layer 30 away from the first metal layer.
  • one of the first metal layer and the second metal layer includes a plurality of connecting bridges 21, and the other layer of the first metal layer and the second metal layer includes a first electrode 41, a second electrode 42 and a through hole 43.
  • the first electrode 41 and the second electrode 42 are arranged to cross each other.
  • the first electrode 41 includes a plurality of first sub-electrodes arranged along the first direction D1, and adjacent first sub-electrodes are bridged by a connecting bridge 21;
  • the second electrode 42 includes a plurality of second sub-electrodes arranged along the second direction D2, and is connected between two adjacent second sub-electrodes along the second direction D2; the through hole 43 penetrates the first sub-electrode and the second sub-electrode. Sub-electrode.
  • At least one of the first metal layer and the second metal layer further includes a compensation electrode surrounding the through hole 43.
  • the compensation electrode includes a first compensation electrode 22 and a second compensation electrode 44, and the first compensation electrode 22 and the second compensation electrode 44
  • the adjacent surface is the first end surface.
  • the surface adjacent to the second compensation electrode 44 and the first compensation electrode 22 is the second end surface.
  • the structures of the first end surface and the second end surface are complementary, and the first end surface or the second end surface is The length of the profile is greater than the thickness b of the first compensation electrode 22 or the second compensation electrode 44 along the direction of the center line OO' of the through hole.
  • the first end surface or the second end surface may be a curved surface or a slope surface.
  • the first compensation electrode 22 and the second compensation electrode 44 may both be provided on the first metal layer, or may both be provided on the second metal layer.
  • the first end surface and the second end surface are both sloped surfaces, and the first compensation electrode 22 and the second compensation electrode 44 are both arranged on the second metal layer.
  • the first end surface includes one or more first protrusions and one or more first spacers
  • the second end surface includes one or more second protrusions and one or more The second spacer
  • the first protrusion is located in the second spacer
  • the second protrusion is located in the first spacer
  • first compensation electrode 22 and the second compensation electrode 44 are arranged on a metal layer, a certain interval should be maintained between the first end surface and the second end surface to prevent the first electrode and the second electrode from being short-circuited.
  • one of the first compensation electrode 22 and the second compensation electrode 44 is provided on the first metal layer, and the other is provided on the second metal layer.
  • the first end surface and the second end surface are both curved, and the first compensation electrode 22 and the second compensation electrode 44 are both disposed on the second metal layer.
  • the first end surface includes one or more first protrusions
  • the second end surface includes one or more second protrusions
  • the first protrusions and the second protrusions are arranged at intervals .
  • the orthographic projection of the first protrusion on the substrate and the orthographic projection of the second compensation electrode on the substrate include overlapping areas; the orthographic projection of the second protrusion on the substrate and the first compensation
  • the orthographic projection of the electrode on the substrate includes the overlapping area.
  • the interval between the first end surface and the second end surface can be set to any small value, or the first end surface and the There may be overlap between the second compensation electrodes, and between the first compensation electrode and the second end surface, thereby further increasing the mutual induction area between the first electrode and the second electrode, and improving the incomplete touch electrode
  • the sensing capacitor at the position improves the uniformity of touch performance in the entire effective display area.
  • the simulation results show that using the overlapping structure of the first compensation electrode and the second compensation electrode shown in Figure 6, the Delta Cm parameter value of the incomplete touch electrode reaches 98.6% of the Delta Cm parameter value of the complete touch electrode, and The Delta Cm parameter values of the complete touch electrodes are almost the same, and the compensation effect is significantly improved.
  • the Delta Cm parameter of the incomplete touch electrode after compensation can be adjusted to the complete touch electrode. 100% of the Delta Cm parameter even exceeds the Delta Cm parameter of the complete touch electrode.
  • the embodiments of the present disclosure not only realize the touchability of the mounting hole area of the effective display area, but also significantly improve the uniformity of the touch performance of the entire effective display area.
  • the first compensation electrode 22 may include N first compensation sub-electrodes, wherein M first compensation sub-electrodes are connected to the first sub-electrodes, and (NM) first compensation sub-electrodes are connected to the The first sub-electrode and the second sub-electrode are insulated, M is a natural number less than or equal to N, and N is a natural number greater than 1.
  • the second compensation electrode 44 may include n pieces of second compensation sub-electrodes, wherein m pieces of second compensation sub-electrodes are connected to the second sub-electrodes, and (nm) pieces of second compensation sub-electrodes are connected to the The first sub-electrode and the second sub-electrode are insulated, m is a natural number less than or equal to n, and n is a natural number greater than 1.
  • the touch display panel of the embodiment of the present disclosure by suspending part of the first compensation sub-electrode or part of the second compensation sub-electrode (that is, insulated from the first and second sub-electrodes), the added compensation sub-electrode and the second sub-electrode can be reduced.
  • the self-capacitance value generated between the cathodes of the display panel improves the display quality of the display panel.
  • the shape of the first compensation electrode 22 is a circular arc structure
  • the shape of the second compensation electrode 44 is a circular arc structure
  • the arc of the first compensation electrode 22 is located in the circle
  • the second compensation electrode The center of the circle where the arc of 44 is located and the center of the circle where the through hole is located can coincide.
  • the diameter of the circle where the arc of the first compensation electrode 22 is located and the diameter of the circle where the arc of the second compensation electrode 44 is located may be the same or may not be the same, which is not limited in the present disclosure.
  • the "patterning process” referred to in the embodiments of the present disclosure includes processes such as depositing a film layer, coating photoresist, mask exposure, developing, etching, and stripping off the photoresist.
  • the "patterning process” "Photolithography process” includes coating film, mask exposure, development and other treatments. The deposition can use sputtering, chemical vapor deposition and other processes.
  • a driving structure layer, a flat layer, an anode, an organic light-emitting layer, and a cathode are sequentially formed on a substrate, and an encapsulation layer is formed on the side of the cathode away from the substrate to obtain a substrate 10.
  • the driving structure layer includes a plurality of gate lines and a plurality of data lines.
  • the plurality of gate lines and a plurality of data lines vertically intersect to define a plurality of pixel units arranged in a matrix.
  • Each pixel unit includes at least 3 sub-pixels, and each sub-pixel includes One or more Thin Film Transistors (TFT).
  • TFT Thin Film Transistors
  • one pixel unit may include 3 sub-pixels, which are a red sub-pixel R, a green sub-pixel G, and a blue sub-pixel B, respectively.
  • the solution of this embodiment is also applicable to a case where one pixel unit includes 4 sub-pixels (red sub-pixel R, green sub-pixel G, blue sub-pixel B, and white sub-pixel W).
  • the preparation process of the driving structure layer may include: first cleaning the substrate, then preparing an active layer on the substrate through a patterning process, and then forming a first insulating layer covering the active layer.
  • a gate line and a gate electrode are formed on the insulating layer, and then a second insulating layer covering the gate line and the gate electrode is formed, and a data line, a source electrode and a drain electrode are formed on the second insulating layer.
  • the thin film transistor can be a bottom gate structure or a top gate structure, and can be an amorphous silicon (a-Si) thin film transistor, or a low temperature polysilicon (LTPS) thin film transistor or an oxide (Oxide) thin film transistor.
  • the anode of each sub-pixel is connected to the drain electrode of the thin film transistor in the sub-pixel through a via hole on the flat layer.
  • the organic light emitting layer may include a stacked hole injection layer (HIL), a hole transport layer (HTL), a light emitting layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL), wherein the hole transport layer (HTL), light emitting layer (EML), electron transport layer (ETL) and electron injection layer (EIL) are sequentially arranged on the hole injection layer.
  • the organic light-emitting layer is formed in the pixel opening area to realize the connection between the organic light-emitting layer and the anode.
  • the encapsulation layer can block water and oxygen, and prevent external water vapor from corroding the organic light-emitting layer, thereby affecting the performance of the touch display panel.
  • the encapsulation layer may adopt a laminated structure of inorganic material/organic material/inorganic material, and the organic material layer is arranged between two inorganic material layers.
  • a first metal layer pattern is formed on the surface of the packaging layer away from the substrate.
  • the first metal layer may include a plurality of connecting bridges 21 and first compensation electrodes 22 arranged at intervals.
  • the connecting bridge 21 is located in the area where the touch electrode is to be formed, and the first compensation electrode 22 is located in the edge area of the through hole 43 to be formed.
  • Forming the first metal layer pattern includes: depositing a conductive film on the substrate 10, coating a layer of photoresist on the conductive film, using a mask to expose and develop the photoresist, and forming an unexposed area at the position of the bridging layer pattern , The photoresist is retained, and the fully exposed area is formed at other locations, the photoresist is removed, the conductive film in the fully exposed area is etched and the remaining photoresist is stripped, and the first metal layer pattern is formed on the substrate 10.
  • the conductive film can be made of metal materials, or transparent conductive materials, such as indium tin oxide ITO, indium zinc oxide IZO, carbon nanotubes, or graphene.
  • the insulating layer 30 can be made of a transparent material, so that the touch panel can be used in a display panel with integrated touch control.
  • the second metal layer may include a first electrode 41, a second electrode 42, a through hole 43, and a second metal layer.
  • the pattern of the compensation electrode 44, the first electrode 41 includes a plurality of first sub-electrodes arranged along the first direction D1, and two adjacent first sub-electrodes along the first direction D1 are electrically connected to a connecting bridge 21 through a via hole
  • the second electrode 42 includes a plurality of second sub-electrodes arranged along the second direction, and along the second direction D2, between two adjacent second sub-electrodes are connected to each other, the first direction D1 and the second direction D2 cross
  • the through hole 43 penetrates the first sub-electrode and the second sub-electrode; the second compensation electrode 44 is located at the edge area of the through hole 43, the surface of the first compensation electrode 22 adjacent to the second compensation electrode 44 is the first end surface, The surface of
  • Both the first direction D1 and the second direction D2 are perpendicular to the thickness direction of the packaging layer.
  • the embodiment of the present disclosure does not limit the size of the included angle between the first direction D1 and the second direction D2, for example, the two may be perpendicular.
  • both the first sub-electrode and the second sub-electrode are in a grid structure, and the materials of the first sub-electrode and the second sub-electrode are both metallic materials. Since the metal material has low resistance, good conductivity, and high sensitivity, the transmission delay of electrical signals in the first sub-electrode and the second sub-electrode can be avoided, and the touch effect can be improved.
  • the shape of the grid in the grid structure can be a regular polygon or an irregular polygon shape.
  • the first compensation electrode and the second compensation electrode are arranged around the position of the through hole, and the first end surface of the first compensation electrode and the second compensation electrode are
  • the structure of the second end face of the compensation electrode is complementary, and the length of the outer contour of the first end face or the second end face is greater than the thickness of the first compensation electrode or the second compensation electrode along the center line of the through hole, which increases the mutual contact of the incomplete touch electrodes.
  • the sensing area increases the sensing capacitance at the incomplete touch electrode and improves the uniformity of touch performance in the entire effective display area.
  • the embodiment of the present disclosure also provides a manufacturing method of the touch display panel. As shown in FIG. 9, the manufacturing method of the touch display panel of the embodiment of the present disclosure includes:
  • a second metal layer is formed on the side of the insulating layer away from the first metal layer, one of the first metal layer and the second metal layer includes a plurality of connecting bridges, and the other layer includes a first electrode and a second electrode
  • the first electrode includes a plurality of first sub-electrodes arranged in a first direction, and adjacent first sub-electrodes are bridged by a connecting bridge
  • the second electrode includes a plurality of second sub-electrodes arranged in a second direction Electrode, and in the second direction, two adjacent second sub-electrodes are connected to each other;
  • at least one of the first metal layer and the second metal layer further includes a compensation electrode surrounding the through hole, and the compensation electrode includes the first Compensation electrode and second compensation electrode, the surface adjacent to the first compensation electrode and the second compensation electrode is the first end surface, the surface adjacent to the second compensation electrode and the first compensation electrode is the second end surface, the first end surface and the second
  • the structure of the end surface is complementary, and the length of the
  • the first end surface or the second end surface may be a curved surface or a slope surface.
  • the first compensation electrode and the second compensation electrode may both be provided on the first metal layer, or may both be provided on the second metal layer.
  • the first end surface includes one or more first protrusions and one or more first spacers
  • the second end surface includes one or more second protrusions and one or more The second spacer
  • the first protrusion is located in the second spacer
  • the second protrusion is located in the first spacer
  • one of the first compensation electrode and the second compensation electrode is provided on the first metal layer, and the other is provided on the second metal layer.
  • the first end surface includes one or more first protrusions
  • the second end surface includes one or more second protrusions
  • the first protrusions and the second protrusions are arranged at intervals .
  • the orthographic projection of the first protrusion on the substrate and the orthographic projection of the second compensation electrode on the substrate include overlapping areas; the orthographic projection of the second protrusion on the substrate and the first compensation
  • the orthographic projection of the electrode on the substrate includes the overlapping area.
  • the interval between the first end surface and the second end surface can be set to any small value, or between the first end surface and the second compensation electrode, There may be overlap between a compensation electrode and the second end surface, thereby further increasing the mutual induction area between the first electrode and the second electrode, increasing the inductive capacitance at the incomplete touch electrode, and increasing the overall The uniformity of touch performance in the effective display area.
  • the first compensation electrode may include N first compensation sub-electrodes, wherein M first compensation sub-electrodes are connected to the first sub-electrodes, and (NM) first compensation sub-electrodes are connected to the first sub-electrodes.
  • M is insulated from the second sub-electrode
  • N is a natural number greater than 1.
  • the second compensation electrode may include n pieces of second compensation sub-electrodes, wherein m pieces of second compensation sub-electrodes are connected to the second sub-electrodes, and (nm) pieces of second compensation sub-electrodes are connected to the second sub-electrodes.
  • One sub-electrode is insulated from the second sub-electrode, m is a natural number less than or equal to n, and n is a natural number greater than 1.
  • the center of the circle where the arc of the first compensation electrode is located, the circle where the arc of the second compensation electrode is located, and the circle where the through hole is located may coincide.
  • the first compensation electrode and the second compensation electrode are arranged at the position surrounding the through hole, and the structure of the first end surface of the first compensation electrode and the second end surface of the second compensation electrode Complementary, and the length of the outer contour of the first end surface or the second end surface is greater than the thickness of the first compensation electrode or the second compensation electrode along the center line of the through hole, which increases the mutual induction area of incomplete touch electrodes and improves the The inductive capacitance at the complete touch electrode improves the uniformity of touch performance in the entire effective display area.
  • An embodiment of the present disclosure also provides a touch display device, including the touch display panel of the foregoing embodiment.
  • the touch display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and so on.
  • connection should be interpreted broadly, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be interpreted broadly, for example, it may be a fixed connection or a detachable connection, or Integrally connected; it can be mechanical connection or electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.

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Abstract

一种触控显示面板及其制备方法、触控显示装置，触控显示面板包括基板、设置在基板上的第一金属层、设置在第一金属层远离基板一侧的绝缘层、设置在绝缘层远离第一金属层一侧的第二金属层，第一金属层和第二金属层中的其中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，第一金属层和第二金属层中的至少一层还包括环绕通孔的补偿电极，补偿电极包括第一补偿电极和第二补偿电极，第一补偿电极与第二补偿电极相邻的表面为第一端面，第二补偿电极与第一补偿电极相邻的表面为第二端面，第一端面和第二端面的结构互补。

Description

触控显示面板及其制备方法、触控显示装置
本申请要求于2020年6月2日提交中国专利局、申请号为202010488947.7、发明名称为“触控显示面板及其制备方法、触控显示装置”的中国专利申请的优先权，其内容应理解为通过引用的方式并入本申请中。
技术领域
本公开实施例涉及但不限于显示技术领域，尤其涉及一种触控显示面板及其制备方法、触控显示装置。
背景技术
随着显示技术的飞速发展，触控技术已经应用到各种电子设备和各个领域中，越来越受到广大使用者的追捧。按照工作原理，触控屏可以分为：电容式、电阻式、红外线式、表面声波式、电磁式、振波感应式以及受抑全内反射光学感应式等。其中，电容式触摸屏以其独特的触控原理，凭借高灵敏度、长寿命、高透光率等优点，广泛应用于各种电子交互场景设备中。
为了实现更大的屏占比，一些显示面板使用了屏内挖孔技术，即在有效显示区内设置用于放置前置摄像头等硬件的挖孔区域。但是，对于集成触控功能的显示面板来说，这种技术破坏了整个有效显示区内触控性能的均一性，降低了触控性能。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本公开实施例提供了一种触控显示面板，包括基板、设置在基板上的第一金属层、设置在第一金属层远离基板一侧的绝缘层以及设置在绝缘层远离第一金属层一侧的第二金属层，其中：所述第一金属层和第二金属层中的其 中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，所述第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过连接桥桥接；所述第二电极包括多个沿第二方向排列的第二子电极，且沿第二方向上、相邻两个第二子电极之间相互连接；所述通孔贯穿所述第一子电极和第二子电极；所述第一金属层和第二金属层中的至少一层还包括环绕所述通孔的补偿电极，所述补偿电极包括第一补偿电极和第二补偿电极，所述第一补偿电极与所述第二补偿电极相邻的表面为第一端面，所述第二补偿电极与所述第一补偿电极相邻的表面为第二端面，所述第一端面和第二端面的结构互补，且所述第一端面的外轮廓的长度大于第一补偿电极沿通孔中心线方向的厚度。
在一些可能的实现方式中，所述第一补偿电极和第二补偿电极的设置位置包括以下至少之一：
所述第一补偿电极和第二补偿电极均设置在所述第一金属层上；
所述第一补偿电极和第二补偿电极均设置在所述第二金属层上；
所述第一补偿电极和第二补偿电极中的一个设置在第一金属层上，另一个设置在第二金属层上。
在一些可能的实现方式中，所述第一端面和第二端面为曲面或坡面。
在一些可能的实现方式中，所述第一端面包括一个或多个第一凸起部以及一个或多个第一间隔部，所述第二端面包括一个或多个第二凸起部以及一个或多个第二间隔部，所述第一凸起部位于所述第二间隔部中，所述第二凸起部位于所述第一间隔部中。
在一些可能的实现方式中，所述第一端面包括一个或多个第一凸起部，所述第二端面包括一个或多个第二凸起部，所述第一凸起部和所述第二凸起部间隔排列。
在一些可能的实现方式中，所述第一补偿电极包括N块第一补偿子电极，其中，M块第一补偿子电极与所述第一子电极连接，(N-M)块第一补偿子电极与所述第一子电极和第二子电极绝缘，M为小于或等于N的自然数，N为大于1的自然数。
在一些可能的实现方式中，所述第二补偿电极包括n块第二补偿子电极，其中，m块第二补偿子电极与所述第二子电极连接，(n-m)块第二补偿子电极与所述第一子电极和第二子电极绝缘，m为小于或等于n的自然数，n为大于1的自然数。
本公开实施例还提供了一种触控显示装置，包括前述的触控显示面板。
本公开实施例还提供了一种触控显示面板的制备方法，包括：在基板上形成第一金属层；在第一金属层远离基板的一侧形成绝缘层；在绝缘层远离第一金属层的一侧形成第二金属层，所述第一金属层和第二金属层中的其中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，所述第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过所述连接桥桥接；所述第二电极包括多个沿第二方向排列的第二子电极，且沿第二方向上、相邻两个第二子电极之间相互连接；所述第一金属层和第二金属层中的至少一层还包括环绕所述通孔的补偿电极，所述补偿电极包括第一补偿电极和第二补偿电极，所述第一补偿电极与所述第二补偿电极相邻的表面为第一端面，所述第二补偿电极与所述第一补偿电极相邻的表面为第二端面，所述第一端面和第二端面的结构互补，且所述第一端面的外轮廓的长度大于第一补偿电极沿通孔中心线方向的厚度。
在一些可能的实现方式中，所述第一补偿电极和第二补偿电极的设置位置，包括以下任意一种：
所述第一补偿电极和第二补偿电极均设置在所述第一金属层上；
所述第一补偿电极和第二补偿电极均设置在所述第二金属层上；
所述第一补偿电极和第二补偿电极中的一个设置在所述第一金属层上，另一个设置在所述第二金属层上。
在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
附图用来提供对本公开技术方案的理解，并且构成说明书的一部分，与 本公开的实施例一起用于解释本公开的技术方案，并不构成对本公开技术方案的限制。
图1为一些技术中的触控显示面板的结构示意图；
图2为本公开实施例的一种触控显示面板的结构示意图；
图3为图2中触控显示面板沿BB方向的剖面结构示意图；
图4为本公开实施例的另一种触控显示面板的结构示意图；
图5为图4中触控显示面板沿BB方向的剖面结构示意图；
图6为本公开实施例的一种补偿电极的结构示意图；
图7为本公开实施例一种形成第一金属层图案后的基板示意图；
图8为本公开实施例一种形成绝缘层图案后的基板示意图；
图9为本公开实施例的一种触控显示面板的制备方法的流程示意图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚明白，下文中将结合附图对本公开的实施例进行详细说明。在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互任意组合。
在实际应用过程中，为了追求更大的有效显示区域面积，减少边框，一些终端厂商开始将用于预留前置摄像头等硬件的安装位置的安装孔，设置在显示面板上的有效显示(Active Area，AA)区域。但是，如图1所示，这种设计使得触控电极在有效显示区安装孔区域的完整性被严重破坏，导致该位置处不完整触控电极的感应电容等电性参数，与有效显示区其它位置完整触控电极的电性参数存在较大差别，从而破坏了整个有效显示区触控性能的均一性。
尽管触控芯片(Touch IC)在算法上对完整性遭到轻微破坏的部分触控电极(Sensor)能够做到一定的算法补偿，这种补偿也是建立在牺牲Touch IC其它性能(如功耗等)的基础上实现的，并且其算法补偿也是有限的，由于 有效显示区安装孔区域Sensor单元的缺失较为严重，要实现有效显示区安装孔区域Senor单元与其他触控区完整Sensor单元触控性能的均一性是几乎不可能的。
本公开实施例提供了一种触控显示面板及其制备方法、触控显示装置，能够提高整个有效显示区触控性能的均一性。通过设置补偿电极，并调节补偿电极的端面结构，以调节有效显示区安装孔区域触控电极的互容感应(Delta Cm)等参数，使得有效显示区安装孔区域不完整Sensor单元的触控电性参数与完整Sensor单元的电性参数趋于一致，从而保证整个触控显示面板触控性能的均一性。
本公开实施例提供了一种触控显示面板，该触控显示面板包括基板、设置在基板上的第一金属层、设置在第一金属层远离基板一侧的绝缘层以及设置在绝缘层远离第一金属层一侧的第二金属层，其中：第一金属层和第二金属层中的其中一层包括多个连接桥，第一金属层和第二金属层中的另一层包括第一电极、第二电极和通孔，第一电极和第二电极相互交叉设置，第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过连接桥桥接；第二电极包括多个沿第二方向排列的第二子电极，且沿第二方向上、相邻两个第二子电极之间相互连接；通孔贯穿第一子电极和第二子电极；第一金属层和第二金属层中的至少一层还包括环绕通孔的补偿电极，补偿电极包括第一补偿电极和第二补偿电极，第一补偿电极与第二补偿电极相邻的表面为第一端面，第二补偿电极与第一补偿电极相邻的表面为第二端面，第一端面和第二端面的结构互补，且第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线方向的厚度。
本公开实施例提供的触控显示面板，通过在环绕通孔的位置设置第一补偿电极和第二补偿电极，设置第一补偿电极的第一端面(即第一补偿电极与第二补偿电极相邻的表面)与第二补偿电极的第二端面(即第二补偿电极与第一补偿电极相邻的表面)的结构互补，且第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线方向的厚度，增大了不完整触控电极相互感应的面积，提升了不完整触控电极处的感应电容，提高了整个有效显示区触控性能的均一性。
图2为本公开实施例的一种触控显示面板的结构示意图，如图2所示，本实施例的触控显示面板包括基板10、设置在基板10上的第一金属层、设置在第一金属层远离基板10一侧的绝缘层30以及设置在绝缘层30远离第一金属层一侧的第二金属层。
其中，第一金属层和第二金属层中的其中一层包括多个连接桥21，第一金属层和第二金属层中的另一层包括第一电极41、第二电极42和通孔43，第一电极41和第二电极42相互交叉设置，第一电极41包括多个沿第一方向D1排列的第一子电极，相邻的第一子电极之间通过连接桥21桥接；第二电极42包括多个沿第二方向D2排列的第二子电极，且沿第二方向D2上、相邻两个第二子电极之间相互连接；通孔43贯穿第一子电极和第二子电极。
第一金属层和第二金属层中的至少一层还包括环绕通孔43的补偿电极，补偿电极包括第一补偿电极22和第二补偿电极44，第一补偿电极22与第二补偿电极44相邻的表面为第一端面，第二补偿电极44与第一补偿电极22相邻的表面为第二端面，第一端面和第二端面的结构互补，且第一端面或第二端面的外轮廓的长度大于第一补偿电极22或第二补偿电极44沿通孔中心线OO’方向的厚度b。
在一种示例性实施例中，第一端面或第二端面可以为曲面或坡面。
在一种示例性实施例中，第一补偿电极22和第二补偿电极44可以均设置在第一金属层上，或者可以均设置在第二金属层上。
例如，如图2和图3所示，第一端面和第二端面均为坡面，第一补偿电极22和第二补偿电极44均设置在第二金属层上。
在一种示例性实施例中，第一端面包括一个或多个第一凸起部以及一个或多个第一间隔部，第二端面包括一个或多个第二凸起部以及一个或多个第二间隔部，第一凸起部位于第二间隔部中，第二凸起部位于第一间隔部中。
当第一补偿电极22和第二补偿电极44设置在一个金属层上时，应保证第一端面和第二端面之间保持一定的间隔，以防止第一电极和第二电极出现短路的情况。
在另一种示例性实施例中，第一补偿电极22和第二补偿电极44中的一 个设置在第一金属层上，另一个设置在第二金属层上。
例如，如图4和图5所示，第一端面和第二端面均为曲面，第一补偿电极22和第二补偿电极44均设置在第二金属层上。
在一种示例性实施例中，第一端面包括一个或多个第一凸起部，第二端面包括一个或多个第二凸起部，第一凸起部和第二凸起部间隔排列。
在一种示例性实施例中，第一凸起部在基板上的正投影与第二补偿电极在基板上的正投影包含重叠区域；第二凸起部在基板上的正投影与第一补偿电极在基板上的正投影包含重叠区域。
当第一补偿电极22和第二补偿电极44设置在不同金属层上时，如图6所示，第一端面和第二端面之间的间隔可以设为任意小的值，或者第一端面和第二补偿电极之间、第一补偿电极和第二端面之间可以出现交叠的情况，从而进一步增大了第一电极和第二电极之间相互感应的面积，提升了不完整触控电极处的感应电容，提高了整个有效显示区触控性能的均一性。
仿真结果表明，使用图6所示的第一补偿电极和第二补偿电极的交叠结构，不完整触控电极的Delta Cm参数值达到了完整触控电极的Delta Cm参数值的98.6％，与完整触控电极的Delta Cm参数值几乎一致，补偿效果显著提升。并且，通过进一步调节第一端面和第二补偿电极之间、第一补偿电极和第二端面之间的交叠面积，可以使补偿后的不完整触控电极的Delta Cm参数达到完整触控电极的Delta Cm参数的100％甚至超过完整触控电极的Delta Cm参数。本公开实施例不仅实现了有效显示区安装孔区域的可触控性，同时也显著提升了整个有效显示区触控性能的均一性。
在一种示例性实施例中，第一补偿电极22可以包括N块第一补偿子电极，其中，M块第一补偿子电极与第一子电极连接，(N-M)块第一补偿子电极与第一子电极和第二子电极绝缘，M为小于或等于N的自然数，N为大于1的自然数。
在一种示例性实施例中，第二补偿电极44可以包括n块第二补偿子电极，其中，m块第二补偿子电极与第二子电极连接，(n-m)块第二补偿子电极与第一子电极和第二子电极绝缘，m为小于或等于n的自然数，n为大于1 的自然数。
本公开实施例的触控显示面板通过将部分第一补偿子电极或部分第二补偿子电极悬浮设置(即与第一子电极和第二子电极绝缘)，可以减小增加的补偿子电极与显示面板阴极之间产生的自电容值，提升显示面板的显示品质。
在一种示例性实施例中，第一补偿电极22的形状为圆弧形结构，第二补偿电极44的形状为圆弧形结构，第一补偿电极22的圆弧所在圆、第二补偿电极44的圆弧所在圆与通孔所在圆的圆心可以重合。
在一种示例性实施例中，第一补偿电极22的圆弧所在圆的直径与第二补偿电极44的圆弧所在圆的直径可以相等，或者可以不相等，本公开对此不作限制。
下面通过本公开实施例触控显示面板的制备过程进一步说明本公开实施例的技术方案。其中，本公开实施例中所说的“构图工艺”包括沉积膜层、涂覆光刻胶、掩模曝光、显影、刻蚀、剥离光刻胶等处理，本公开实施例中所说的“光刻工艺”包括涂覆膜层、掩模曝光、显影等处理，沉积可采用溅射、化学气相沉积等工艺。
(1)在衬底上依次形成驱动结构层、平坦层、阳极、有机发光层、阴极，并在阴极远离衬底的一侧形成封装层，得到基板10。
驱动结构层包括多条栅线和多条数据线，多条栅线和多条数据线垂直交叉限定出多个矩阵排布的像素单元，每个像素单元包括至少3个子像素，每个子像素包括一个或多个薄膜晶体管(Thin Film Transistor，TFT)。本实施例中，一个像素单元可以包括3个子像素，分别为红色子像素R、绿色子像素G和蓝色子像素B。当然，本实施例方案也适用于一个像素单元包括4个子像素(红色子像素R、绿色子像素G、蓝色子像素B和白色子像素W)情形。本实施例中，驱动结构层的制备过程可以包括：先对衬底进行清洗，然后通过构图工艺在衬底上制备出有源层，随后形成覆盖有源层的第一绝缘层，在第一绝缘层上形成栅线和栅电极，随后形成覆盖栅线和栅电极的第二绝缘层，在第二绝缘层上形成数据线、源电极和漏电极。其中，薄膜晶体管可以是底栅结构，也可以是顶栅结构，可以是非晶硅(a-Si)薄膜晶体管，也可 以是低温多晶硅(LTPS)薄膜晶体管或氧化物(Oxide)薄膜晶体管。
每个子像素的阳极通过平坦层上的过孔与该子像素中薄膜晶体管的漏电极连接。有机发光层可以包括叠设的空穴注入层(HIL)、空穴传输层(HTL)、发光层(EML)、电子传输层(ETL)和电子注入层(EIL)，其中，空穴传输层(HTL)、发光层(EML)、电子传输层(ETL)和电子注入层(EIL)依次设置在空穴注入层上。有机发光层形成在像素开口区域内，实现有机发光层与阳极连接。
封装层可以起到阻水阻氧的作用，防止外部水汽对有机发光层的侵蚀，从而影响该触控显示面板的性能。封装层可以采用无机材料/有机材料/无机材料的叠层结构，有机材料层设置在两个无机材料层之间。
(2)在封装层远离衬底一侧的表面，形成第一金属层图案，如图7所示，第一金属层可以包括多个间隔设置的连接桥21以及第一补偿电极22。连接桥21位于待形成触控电极所在区域，第一补偿电极22位于待形成通孔43的边缘区域。形成第一金属层图案包括：在基板10上沉积导电薄膜，在导电薄膜上涂覆一层光刻胶，采用掩膜版对光刻胶进行曝光并显影，在桥接层图案位置形成未曝光区域，保留有光刻胶，在其它位置形成完全曝光区域，光刻胶被去除，对完全曝光区域的导电薄膜进行刻蚀并剥离剩余的光刻胶，在基板10上形成第一金属层图案。其中，导电薄膜可以采用金属材料，也可以采用透明导电材料，如氧化铟锡ITO、氧化铟锌IZO、碳纳米管或者石墨烯等。
(10)在第一金属层远离衬底一侧的表面，形成绝缘层30图案，如图8所示，绝缘层30包括多个过孔，过孔设置在连接桥21的两端位置。绝缘层可以使用透明材料制备，以便于使得该触控面板可以用于集成触控的显示面板。
(11)在绝缘层30远离衬底一侧的表面，形成第二金属层图案，如图4所示，第二金属层可以包括第一电极41、第二电极42、通孔43和第二补偿电极44图案，第一电极41包括多个沿第一方向D1排列的第一子电极，沿第一方向D1上、相邻的两个第一子电极与一个连接桥21通过过孔电连接； 第二电极42包括多个沿第二方向排列的第二子电极，且沿第二方向D2上、相邻两个第二子电极之间相互连接，第一方向D1和第二方向D2交叉；通孔43贯穿第一子电极和第二子电极；第二补偿电极44位于通孔43的边缘区域，第一补偿电极22上与第二补偿电极44相邻的表面为第一端面，第二补偿电极44上与第一补偿电极22相邻的表面为第二端面，第一端面和第二端面的结构互补，且第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线OO’方向的厚度b。
第一方向D1和第二方向D2均垂直于封装层的厚度方向。本公开实施例对第一方向D1和第二方向D2夹角的大小不做限定，例如二者可以垂直。
本实施例中，第一子电极和第二子电极均呈网格结构，且第一子电极和第二子电极的材料均为金属材料。由于金属材料的电阻低，导电性良好，灵敏度高，可以避免电信号在第一子电极和第二子电极中的传输延迟，提升触控效果。该网格结构中网格的形状可以为规则多边形或不规则多边形形状。
通过上述制备流程可以看出，本公开实施例所提供的触控显示面板，通过在环绕通孔的位置设置第一补偿电极和第二补偿电极，且第一补偿电极的第一端面与第二补偿电极的第二端面的结构互补，第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线方向的厚度，增大了不完整触控电极相互感应的面积，提升了不完整触控电极处的感应电容，提高了整个有效显示区触控性能的均一性。
本公开实施例还提供了一种触控显示面板的制备方法。如图9所示，本公开实施例触控显示面板的制备方法包括：
S1、在基板上形成第一金属层；
S2、在第一金属层远离基板的一侧形成绝缘层；
S3、在绝缘层远离第一金属层的一侧形成第二金属层，第一金属层和第二金属层中的其中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过连接桥桥接；第二电极包括多个沿第二方向排列的第二子电极，且 沿第二方向上、相邻两个第二子电极之间相互连接；第一金属层和第二金属层中的至少一层还包括环绕通孔的补偿电极，补偿电极包括第一补偿电极和第二补偿电极，第一补偿电极与第二补偿电极相邻的表面为第一端面，第二补偿电极与第一补偿电极相邻的表面为第二端面，第一端面和第二端面的结构互补，第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线方向的厚度。
在一种示例性实施例中，第一端面或第二端面可以为曲面或坡面。
在一种示例性实施例中，第一补偿电极和第二补偿电极可以均设置在第一金属层上，或者可以均设置在第二金属层上。
在一种示例性实施例中，第一端面包括一个或多个第一凸起部以及一个或多个第一间隔部，第二端面包括一个或多个第二凸起部以及一个或多个第二间隔部，第一凸起部位于第二间隔部中，第二凸起部位于第一间隔部中。
在另一种示例性实施例中，第一补偿电极和第二补偿电极中的一个设置在第一金属层上，另一个设置在第二金属层上。
在一种示例性实施例中，第一端面包括一个或多个第一凸起部，第二端面包括一个或多个第二凸起部，第一凸起部和第二凸起部间隔排列。
在一种示例性实施例中，第一凸起部在基板上的正投影与第二补偿电极在基板上的正投影包含重叠区域；第二凸起部在基板上的正投影与第一补偿电极在基板上的正投影包含重叠区域。
当第一补偿电极和第二补偿电极设置在不同金属层上时，第一端面和第二端面之间的间隔可以设为任意小的值，或者第一端面和第二补偿电极之间、第一补偿电极和第二端面之间可以出现交叠的情况，从而进一步增大了第一电极和第二电极之间相互感应的面积，提升了不完整触控电极处的感应电容，提高了整个有效显示区触控性能的均一性。
在一种示例性实施例中，第一补偿电极可以包括N块第一补偿子电极，其中，M块第一补偿子电极与第一子电极连接，(N-M)块第一补偿子电极与第一子电极和第二子电极绝缘，M为小于或等于N的自然数，N为大于1的自然数。
在一种示例性实施例中，第二补偿电极可以包括n块第二补偿子电极，其中，m块第二补偿子电极与第二子电极连接，(n-m)块第二补偿子电极与第一子电极和第二子电极绝缘，m为小于或等于n的自然数，n为大于1的自然数。
在一种示例性实施例中，第一补偿电极的圆弧所在圆、第二补偿电极的圆弧所在圆与通孔所在圆的圆心可以重合。
本实施例提供的触控显示面板的制备方法，通过在环绕通孔的位置设置第一补偿电极和第二补偿电极，第一补偿电极的第一端面与第二补偿电极的第二端面的结构互补，且第一端面或第二端面的外轮廓的长度大于第一补偿电极或第二补偿电极沿通孔中心线方向的厚度，增大了不完整触控电极相互感应的面积，提升了不完整触控电极处的感应电容，提高了整个有效显示区触控性能的均一性。
本公开实施例还提供了一种触控显示装置，包括前述实施例的触控显示面板。触控显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在本公开实施例的描述中，术语“中部”、“上”、“下”、“前”、“后”、“竖直”、“水平”、“顶”、“底”“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
在本公开实施例的描述中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本公开中的具体含义。
虽然本公开所揭露的实施方式如上，但所述的内容仅为便于理解本公开而采用的实施方式，并非用以限定本公开。任何本公开所属领域内的技术人员，在不脱离本公开所揭露的精神和范围的前提下，可以在实施的形式及细 节上进行任何的修改与变化，但本公开的专利保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (18)

  1. 一种触控显示面板，包括基板、设置在基板上的第一金属层、设置在第一金属层远离基板一侧的绝缘层以及设置在绝缘层远离第一金属层一侧的第二金属层，其中：
    所述第一金属层和第二金属层中的其中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，所述第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过连接桥桥接；所述第二电极包括多个沿第二方向排列的第二子电极，且沿第二方向上、相邻两个第二子电极之间相互连接；所述通孔贯穿所述第一子电极和第二子电极；
    所述第一金属层和第二金属层中的至少一层还包括环绕所述通孔的补偿电极，所述补偿电极包括第一补偿电极和第二补偿电极，所述第一补偿电极与所述第二补偿电极相邻的表面为第一端面，所述第二补偿电极与所述第一补偿电极相邻的表面为第二端面，所述第一端面和第二端面的结构互补，且所述第一端面的外轮廓的长度大于第一补偿电极沿通孔中心线方向的厚度。
  2. 根据权利要求1所述的触控显示面板，其中，所述第一补偿电极和所述第二补偿电极之中的至少一个，与一个所述第一子电极或一个第二子电极电连接。
  3. 根据权利要求1所述的触控显示面板，其中，所述第一补偿电极和第二补偿电极的设置位置包括以下至少之一：
    所述第一补偿电极和第二补偿电极均设置在所述第一金属层上；
    所述第一补偿电极和第二补偿电极均设置在所述第二金属层上；
    所述第一补偿电极和第二补偿电极中的一个设置在第一金属层上，另一个设置在第二金属层上。
  4. 根据权利要求1所述的触控显示面板，其中，所述第一端面和第二端面为曲面或坡面。
  5. 根据权利要求4所述的触控显示面板，其中，所述第一端面包括一个 或多个第一凸起部以及一个或多个第一间隔部，所述第二端面包括一个或多个第二凸起部以及一个或多个第二间隔部，所述第一凸起部位于所述第二间隔部中，所述第二凸起部位于所述第一间隔部中。
  6. 根据权利要求4所述的触控显示面板，其中，所述第一端面包括一个或多个第一凸起部，所述第二端面包括一个或多个第二凸起部，所述第一凸起部和所述第二凸起部间隔排列。
  7. 根据权利要求6所述的触控显示面板，其中，所述第一凸起部在所述基板上的正投影与所述第二补偿电极在所述基板上的正投影包含重叠区域；所述第二凸起部在所述基板上的正投影与所述第一补偿电极在所述基板上的正投影包含重叠区域。
  8. 根据权利要求1至7任一所述的触控显示面板，其中，所述第一补偿电极包括N块第一补偿子电极，其中，M块第一补偿子电极与所述第一子电极连接，(N-M)块第一补偿子电极与所述第一子电极和第二子电极绝缘，M为小于或等于N的自然数，N为大于1的自然数。
  9. 根据权利要求1至7任一所述的触控显示面板，其中，所述第二补偿电极包括n块第二补偿子电极，其中，m块第二补偿子电极与所述第二子电极连接，(n-m)块第二补偿子电极与所述第一子电极和第二子电极绝缘，m为小于或等于n的自然数，n为大于1的自然数。
  10. 根据权利要求1至7任一所述的触控显示面板，其中，所述第一补偿电极的形状为圆弧形结构，所述第二补偿电极的形状为圆弧形结构，所述第一补偿电极的圆弧所在圆、所述第二补偿电极的圆弧所在圆与所述通孔所在圆的圆心重合。
  11. 根据权利要求10所述的触控显示面板，其中，所述第一补偿电极的圆弧所在圆的直径与所述第二补偿电极的圆弧所在圆的直径相等。
  12. 一种触控显示装置，包括权利要求1至11任一所述的触控显示面板。
  13. 一种触控显示面板的制备方法，包括：
    在基板上形成第一金属层；
    在第一金属层远离基板的一侧形成绝缘层；
    在绝缘层远离第一金属层的一侧形成第二金属层，所述第一金属层和第二金属层中的其中一层包括多个连接桥，另一层包括第一电极、第二电极和通孔，所述第一电极包括多个沿第一方向排列的第一子电极，相邻的第一子电极之间通过所述连接桥桥接；所述第二电极包括多个沿第二方向排列的第二子电极，且沿第二方向上、相邻两个第二子电极之间相互连接；所述第一金属层和第二金属层中的至少一层还包括环绕所述通孔的补偿电极，所述补偿电极包括第一补偿电极和第二补偿电极，所述第一补偿电极与所述第二补偿电极相邻的表面为第一端面，所述第二补偿电极与所述第一补偿电极相邻的表面为第二端面，所述第一端面和第二端面的结构互补，且所述第一端面的外轮廓的长度大于第一补偿电极沿通孔中心线方向的厚度。
  14. 根据权利要求13所述的制备方法，其中，所述第一补偿电极和第二补偿电极的设置位置，包括以下任意一种：
    所述第一补偿电极和第二补偿电极均设置在所述第一金属层上；
    所述第一补偿电极和第二补偿电极均设置在所述第二金属层上；
    所述第一补偿电极和第二补偿电极中的一个设置在所述第一金属层上，另一个设置在所述第二金属层上。
  15. 根据权利要求13所述的制备方法，其中，所述第一端面和第二端面为曲面或坡面。
  16. 根据权利要求15所述的制备方法，其中，所述第一端面包括一个或多个第一凸起部以及一个或多个第一间隔部，所述第二端面包括一个或多个第二凸起部以及一个或多个第二间隔部，所述第一凸起部位于所述第二间隔部中，所述第二凸起部位于所述第一间隔部中。
  17. 根据权利要求15所述的制备方法，其中，所述第一端面包括一个或 多个第一凸起部，所述第二端面包括一个或多个第二凸起部，所述第一凸起部和所述第二凸起部间隔排列。
  18. 根据权利要求17所述的制备方法，其中，所述第一凸起部在所述基板上的正投影与所述第二补偿电极在所述基板上的正投影包含重叠区域；所述第二凸起部在所述基板上的正投影与所述第一补偿电极在所述基板上的正投影包含重叠区域。
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