WO2018045828A1 - 触控单元及其制造方法、触控显示面板 - Google Patents

触控单元及其制造方法、触控显示面板 Download PDF

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Publication number
WO2018045828A1
WO2018045828A1 PCT/CN2017/093519 CN2017093519W WO2018045828A1 WO 2018045828 A1 WO2018045828 A1 WO 2018045828A1 CN 2017093519 W CN2017093519 W CN 2017093519W WO 2018045828 A1 WO2018045828 A1 WO 2018045828A1
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WIPO (PCT)
Prior art keywords
electrode
touch
sub
electrodes
base substrate
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PCT/CN2017/093519
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English (en)
French (fr)
Inventor
许邹明
胡明
张明
王静
张贵玉
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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Priority to US15/750,521 priority Critical patent/US10809845B2/en
Publication of WO2018045828A1 publication Critical patent/WO2018045828A1/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
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes
    • 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
    • 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
    • G06F2203/04114—Touch screens adapted for alternating or simultaneous interaction with active pens and passive pointing devices like fingers or passive pens

Definitions

  • the present disclosure relates to the field of touch display technologies, and in particular, to a touch unit, a method of manufacturing the same, and a touch display panel.
  • touch display panels are increasingly being used in electronic products such as touch screen mobile phones or tablet computers.
  • the touch display panel not only has a display function but also has a touch function.
  • the touch display panel generally includes a base substrate and a plurality of touch units arranged in an array on the base substrate.
  • the touch unit may include a first electrode and a second electrode disposed vertically, and an insulating layer is disposed between the first electrode and the second electrode, and the first electrodes of each row of the touch unit are connected to form a touch driving
  • the second electrode of each column of the touch unit is connected to form a touch sensing line, and one touch driving line and one touch sensing line correspond to one touch unit, and all touch driving lines on the touch display panel and All touch sensing lines are connected to the control unit.
  • the control unit can sequentially input a driving voltage to each touch driving line, and collect each touch sensing line when inputting a driving voltage to a touch driving line. The induced voltage on the.
  • the control unit may determine that the touch driving line on the touch display panel and the touch sensing area corresponding to the touch sensing line are not touched; If the sensing voltage of the touch sensing line is not the preset voltage, the control unit may determine that the touch driving line on the touch display panel and the touch sensing area corresponding to the touch sensing line are touched. Then, according to the position of the touched area on the touch display panel on the touch display panel, the touch display panel is controlled to display a corresponding image.
  • the first electrode and the second electrode have only one electrode intersection in the area where the touch unit is located on the touch display panel, and the area other than the intersection of the electrodes in the area where the touch unit is located is When touched, the voltage of the second electrode collected on the touch sensing line is still a preset voltage. Therefore, effective touch cannot be performed, and the touch precision is low.
  • the present disclosure provides a touch unit, a manufacturing method thereof, and a touch display panel.
  • the technical solution is as follows:
  • a touch unit in a first aspect, includes: at least two subunits arranged in an array on a base substrate,
  • Each of the subunits includes: a first electrode and a second electrode formed on the base substrate, and an initial insulating layer is formed between the first electrode and the second electrode, wherein the first An orthographic projection area of the electrode on the second electrode is located in an orthographic projection area of the initial insulating layer on the second electrode;
  • the first electrodes in the sub-units of each row are sequentially connected to form a first touch line, and each column of the sub-units
  • the second electrodes are sequentially connected to form a second touch line, and each of the first touch lines and each of the second touch lines are connected to the control unit.
  • the length direction of the first electrode is perpendicular to the length direction of the second electrode.
  • the touch unit further includes: a first connection line and a second connection line formed on the base substrate, and all the first touch lines in the touch unit One end of each of the second touch lines in the touch unit is connected to the control unit through the second connection line.
  • the second electrode comprises:
  • Two second sub-electrodes and a conductive bridge are respectively located at two sides of the first electrode, and are respectively connected to both ends of the conductive bridge.
  • the first electrode, the conductive bridge, and the second sub-electrode are made of a transparent conductive material.
  • the touch unit includes nine sub-units arranged in an array on the base substrate, and the nine sub-units are arranged in three rows and three columns.
  • the touch unit has an area of 25 mm 2 .
  • the thickness of the first electrode and the second electrode are both the first electrode and the second electrode.
  • the initial insulating layer has a thickness of 1.5 to 2.5 um.
  • the thickness of the first connecting line and the second connecting line are both
  • the touch unit further includes: an auxiliary insulating layer covering the at least two sub-units, the first connecting line, and the second connecting line.
  • a touch display panel in a second aspect, includes: a base substrate, and a plurality of touch units formed on the base substrate, wherein the touch unit is The touch unit of the first aspect.
  • a method of manufacturing a touch unit comprising:
  • each of the sub-units including: a first electrode and a second electrode formed on the base substrate, the first electrode and the second electrode An initial insulating layer is formed between the electrodes, wherein an orthographic projection area of the first electrode on the second electrode is located in an orthographic projection area of the initial insulating layer on the second electrode, each row
  • the first electrodes of the sub-units are sequentially connected to form a first touch line
  • the second electrodes of the sub-units of each column are sequentially connected to form a second touch line;
  • Each of the second touch lines is connected to the control unit.
  • the length direction of the first electrode is perpendicular to the length direction of the second electrode.
  • the forming at least two subunits of the array arrangement on the base substrate comprises:
  • the conductive bridge pattern comprising n conductive bridges, the n being an integer greater than or equal to 2;
  • the electrode pattern including n first electrodes and 2n second sub-electrodes, each of the first electrodes and one conductive bridge and two The second sub-electrode corresponds to;
  • the preset first electrode is any one of the n first electrodes, and the predetermined first electrode respectively corresponds to a preset conductive bridge and two preset second sub-electrodes, Two preset second sub-electrodes are respectively located on two sides of the preset first electrode, and two ends of the preset conductive bridge are respectively connected with the two preset second sub-electrodes, and constitute a preset second electrode .
  • the forming at least two subunits of the array arrangement on the base substrate comprises:
  • the electrode pattern including n first electrodes and 2n second sub-electrodes, each of the first electrodes corresponding to two of the second sub-electrodes, wherein n is An integer greater than or equal to 2;
  • the conductive bridge pattern includes n conductive bridges, and the n conductive bridges are in one-to-one correspondence with the n first electrodes;
  • the preset first electrode is any one of the n first electrodes, and the predetermined first electrode respectively corresponds to a preset conductive bridge and two preset second sub-electrodes, Two preset second sub-electrodes are respectively located on two sides of the preset first electrode, and two ends of the preset conductive bridge are respectively connected with the two preset second sub-electrodes, and form a preset Two electrodes.
  • the connecting the first touch line to the control unit includes:
  • first connection line on the base substrate on which the at least two subunits are formed, the first connection line connecting one end of each of the first touch lines to the control unit;
  • the connecting the second touch line to the control unit includes:
  • the forming at least two subunits of the array arrangement on the base substrate comprises:
  • Nine sub-units arranged in an array are formed on the base substrate, and the nine sub-units are arranged in three rows and three columns.
  • the method further includes:
  • the auxiliary insulating layer is covered on the at least two sub-units, the first connection line, and the second connection line.
  • the present disclosure provides a touch unit and a method of manufacturing the same, the touch display panel, the touch unit includes at least two subunits, and each of the subunits includes a first electrode and a second electrode, and the first electrode An initial insulating layer is formed between the first touch line and each of the second touch lines, and the first electrode and the second electrode of the touch unit intersect with each other.
  • the number of dots increases, the number of electrodes capable of generating an induced voltage in the touch unit increases.
  • the induced voltage generated at the electrode at the intersection of the other electrodes is pre-exposed. The voltage is different, and the induced voltage collected from the touch line is different from the preset voltage. Therefore, effective touch can be performed, and the touch precision is improved.
  • FIG. 1 is a schematic structural diagram of a touch unit according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of another touch unit according to an embodiment of the present disclosure.
  • FIG. 3 is a schematic structural diagram of a touch display panel according to an embodiment of the present disclosure.
  • FIG. 4 is a flowchart of a method for manufacturing a touch unit according to an embodiment of the present disclosure
  • FIG. 5 is a flowchart of a method for fabricating another touch unit according to an embodiment of the present disclosure
  • FIG. 6A is a partial schematic structural diagram of a touch unit according to an embodiment of the present disclosure.
  • FIG. 6B is a partial schematic structural diagram of another touch unit according to an embodiment of the present disclosure.
  • FIG. 6C is a partial schematic structural diagram of still another touch unit according to an embodiment of the present disclosure.
  • FIG. 7A is a partial schematic structural diagram of a touch unit according to another embodiment of the present disclosure.
  • FIG. 7B is a partial schematic structural diagram of still another touch unit according to another embodiment of the present disclosure.
  • FIG. 7C is a partial schematic structural diagram of still another touch unit according to another embodiment of the present disclosure.
  • an embodiment of the present disclosure provides a touch unit 0 , which may include at least two sub-units 01 arranged in an array on a substrate 1 .
  • the k-area in Figure 1 shows a section of a sub-unit along the cutting line ij.
  • Each of the sub-units 01 may include: a first electrode X and a second electrode Y formed on the base substrate 1, and an initial insulating layer A is formed between the first electrode X and the second electrode Y, wherein the first electrode X is The orthographic projection area on the second electrode Y is located in the orthographic projection area of the initial insulating layer A on the second electrode Y.
  • the first electrodes X in each row of sub-units 01 are sequentially connected to form a first touch line
  • the second electrodes Y in each column of sub-units 01 are sequentially connected to form a second touch line
  • each of the first touch lines and each The second touch lines are connected to a control unit (not shown in FIG. 1).
  • an embodiment of the present disclosure provides a touch unit including at least two sub-units, and each sub-unit includes a first electrode and a second electrode, and a first electrode and a second electrode are formed.
  • An initial insulating layer is provided, and each of the first touch lines and each of the second touch lines are connected to the control unit, and the points at which the first electrode and the second electrode intersect in the touch unit are increased, and the touch unit is The number of electrodes capable of generating an induced voltage is increased.
  • the induced voltage generated at the electrode at the intersection of the other electrodes and the preset power are Different pressures, the induced voltage collected from the touch line is different from the preset voltage, so that effective touch can be performed and the touch precision is improved.
  • the length direction of the first electrode X may be at an angle with the length direction of the second electrode Y, such that the first electrode X has an orthographic projection area on the second electrode Y (ie, the first The positive projection area of the electrode X in the plane where the second electrode Y is located is located on the second electrode Y); in one embodiment, the length direction of the first electrode X is perpendicular to the length direction of the second electrode Y, that is, the first The angle between the longitudinal direction of one electrode X and the longitudinal direction of the second electrode Y is 90 degrees.
  • control unit in the embodiment of the present disclosure may be the same as the Bonding lead in the related art
  • the touch unit 01 may include: nine subunits 01 arranged in an array on the base substrate 1, and the nine The subunits 01 are arranged in three rows and three columns, that is, the nine subunits 01 may include three rows of subunits and three columns of subunits.
  • the area of the touch unit 01 may be 25 mm 2 (square millimeters), that is, the touch unit 01 may be a square with a side length of 5 mm (mm).
  • the touch unit 0 may further include: a first connection line P formed on the base substrate 1 and The second connection line Q, one end of all the first touch lines in the touch unit 0 is connected to the control unit 02 through the first connection line P, and one end of all the second touch lines in the touch unit 0 is passed
  • the second connection line Q is connected to the control unit 02.
  • the touch unit 0 includes a plurality of first touch lines and a plurality of second touch lines, and the plurality of first touch lines are connected together, and are connected to the control unit 02 through the first connection line P.
  • the plurality of second touch lines are connected together and connected to the control unit 02 through the second connection line Q, that is, one touch unit 0 only corresponds to two connection lines connected to the control unit 02,
  • the touch display panel in which the touch unit 0 is located has a small number of connecting lines and a small area occupied by the touch display panel. Therefore, the touch display panel in which the touch unit 0 is located can have a narrow bezel characteristic. .
  • the second electrode Y may include: two second sub-electrodes W1 and a conductive bridge W2.
  • the two second sub-electrodes W1 are respectively located on two sides of the first electrode X, and respectively respectively are opposite to the two ends of the conductive bridge W2. connection.
  • the materials of the first electrode X, the conductive bridge W2, and the second sub-electrode W1 may each be a transparent conductive material.
  • the material of the first electrode X and the second sub-electrode W1 may be indium tin oxide (Indium Tin Oxides; ITO), metal mesh (Metal Mesh) or graphene, and the material of the conductive bridge W2 may be It is ITO or zinc oxide (English: zinc oxide; referred to as: ZnO).
  • the thickness of the first electrode X and the second electrode Y may both be (A), it needs to be explained that Equal to 10 minus 10 square meters.
  • the initial insulating layer A may have a thickness of 1.5 to 2.5 um (micrometers).
  • the thickness of the first connection line P and the second connection line Q may both be
  • the touch unit 0 may further include: an auxiliary insulating layer (not shown in FIG. 2) covering the at least two sub-units 01, the first connection line P, and the second connection line Q. Since the touch unit 0 further includes an auxiliary insulating layer, and the auxiliary insulating layer covers the at least two sub-units 01, the first connecting line P, and the second connecting line Q, the at least two sub-units 01, the first connecting line P, and the The second connection line Q serves as a protection.
  • the material of the auxiliary insulating layer may be an organic coating, such as the same material as the upper cover layer (English: over cover; referred to as OC), or may be an inorganic material such as SiO 2 (silicon dioxide).
  • the OGS International: One Glass Solution
  • Chinese Integrated Touch
  • the touch panel can be touched on the touch display panel by using a finger or a stylus, and the touch on the touch display panel is more and more popular.
  • the tip of the stylus is thin, the contact area between the tip of the stylus and the touch display panel is a circle having a diameter of less than 2 mm. Therefore, in this case, the area corresponding to each electrode intersection is more required. Smaller, generally can be a circle with a diameter of less than 4mm.
  • a touch unit includes only one first electrode and one second electrode, that is, one touch unit in the related art only includes one electrode intersection point, when the first electrode and the second electrode fail
  • the area corresponding to the touch unit on the touch display panel cannot achieve effective touch.
  • the touch unit provided by the embodiment of the present disclosure includes at least two sub-units, that is, the touch unit includes at least two electrode intersections, and when one sub-unit fails, the other sub-units can still work normally, and the touch display panel The area corresponding to the touch unit can still perform effective touch.
  • an embodiment of the present disclosure provides a touch unit including at least two sub-units, and each sub-unit includes a first electrode and a second electrode, and a first electrode and a second electrode are formed.
  • An initial insulating layer is provided, and each of the first touch lines and each of the second touch lines are connected to the control unit, and the points at which the first electrode and the second electrode intersect in the touch unit are increased, and the touch unit is The number of electrodes capable of generating an induced voltage is increased.
  • the induced voltage generated at the electrode at the intersection of the other electrodes is different from the preset voltage.
  • the induced voltage collected on the line is different from the preset voltage, so that effective touch can be performed and the touch precision is improved.
  • the embodiment of the present disclosure provides a touch display panel 2, which may include: a substrate substrate (not shown in FIG. 3), and an array row formed on the substrate substrate.
  • the touch unit 0 of the plurality of touch units 0 of the cloth may be the touch unit 0 shown in FIG. 1 or FIG. 2 .
  • the touch display panel 2 can further include a control unit 02.
  • Each row of the touch unit 0 may include three rows of sub-units, and the first electrodes in each row of sub-units are sequentially connected together, and each column of the touch unit 0 may include three columns of sub-units, and the second electrode in each column of sub-units They are all connected together in turn.
  • the embodiment of the present disclosure provides a touch display panel
  • the touch unit in the touch display panel includes at least two sub-units, and each sub-unit includes a first electrode and a second electrode, and the first electrode
  • An initial insulating layer is formed between the first touch line and each of the second touch lines, and the first electrode and the second electrode of the touch unit intersect with each other.
  • the number of electrodes capable of generating an induced voltage in the touch unit increases.
  • the induced voltage generated at the electrode at the intersection of the other electrodes is pre-exposed. The voltage is different, and the induced voltage collected from the touch line is different from the preset voltage. Therefore, effective touch can be performed, and the touch precision is improved.
  • the embodiment of the present disclosure provides a method for manufacturing a touch unit, and the method for manufacturing the touch unit may include:
  • Step 401 forming at least two sub-units of the array arrangement on the base substrate, each sub-unit comprising: formed on a first electrode and a second electrode on the base substrate, an initial insulating layer is formed between the first electrode and the second electrode, wherein an orthographic projection area of the first electrode on the second electrode is located at the second electrode of the initial insulating layer In the upper orthographic projection area, the first electrodes in each row of sub-units are sequentially connected to form a first touch line, and the second electrodes in each column of sub-units are sequentially connected to form a second touch line;
  • Step 402 Connect each of the first touch lines to the control unit
  • Step 403 Connect each second touch line to the control unit.
  • the embodiment of the present disclosure provides a method for manufacturing a touch unit.
  • the touch unit manufactured by the method includes at least two sub-units, and each sub-unit includes a first electrode and a second electrode, and the first electrode An initial insulating layer is formed between the first touch line and each of the second touch lines, and the first electrode and the second electrode of the touch unit intersect with each other.
  • the number of dots increases, the number of electrodes capable of generating an induced voltage in the touch unit increases.
  • the induced voltage and the preset voltage generated at the electrodes at the other intersections are increased. Differently, the induced voltage collected from the touch line is different from the preset voltage, so that effective touch can be performed and the touch precision is improved.
  • the embodiment of the present disclosure provides a method for manufacturing a touch unit, and the method for manufacturing the touch unit may include:
  • Step 501 Form at least two sub-units of the array arrangement on the base substrate.
  • the substrate may be cleaned, such as using a conventional cleaning method such as a roller brush, a disk brush, a lotion spray, or a pure water spray to clean the surface of the substrate, and the glass substrate is removed.
  • a conventional cleaning method such as a roller brush, a disk brush, a lotion spray, or a pure water spray to clean the surface of the substrate, and the glass substrate is removed. Surface dirt.
  • step 501 at least two subunits of the array arrangement may be formed on the base substrate in the following two ways:
  • a conductive bridge pattern may first be formed on the base substrate 1, and the conductive bridge pattern may include n conductive bridges W2, where n may be an integer greater than or equal to 2, for example, The conductive bridge pattern may include nine conductive bridges W2.
  • the conductive bridge pattern may be formed on the base substrate by one patterning process. Specifically, the one-time patterning process may include several steps of coating, exposure, development, etching, and stripping.
  • the initial insulating layer A may be formed on the base substrate 1 on which the n conductive bridges w2 are formed, and specifically, may be on the base substrate 1.
  • the initial insulating layer A is formed by one patterning process so that the initial insulating layer A can cover all of the conductive bridges W2.
  • an electrode pattern may be formed on the base substrate on which the initial insulating layer A is formed.
  • the electrode pattern may include n first electrodes X and 2n second sub-electrodes W1, each of which corresponds to one conductive bridge W2 and two second sub-electrodes W1, respectively.
  • the preset first electrode is any one of the n first electrodes X, and the preset first electrodes respectively correspond to the preset conductive bridge and the two preset second sub-electrodes, and the two presets are respectively
  • the two sub-electrodes are respectively located on two sides of the preset first electrode, and two ends of the preset conductive bridge are respectively connected with the two preset second sub-electrodes, and constitute a preset second electrode.
  • the materials of the first electrode, the second sub-electrode and the conductive bridge may be the same, and the first electrode and the second sub-electrode may be formed by one patterning process.
  • an electrode pattern may be formed on the base substrate, and the electrode pattern may include n a first electrode X and 2n second sub-electrodes W1, each of which corresponds to two second sub-electrodes W1, n may be an integer greater than or equal to 2; as shown in FIG. 7B, forming an electrode After the pattern, the initial insulating layer A may be formed on the base substrate on which the electrode pattern is formed. As shown in FIG. 7A, the electrode pattern may include n a first electrode X and 2n second sub-electrodes W1, each of which corresponds to two second sub-electrodes W1, n may be an integer greater than or equal to 2; as shown in FIG. 7B, forming an electrode After the pattern, the initial insulating layer A may be formed on the base substrate on which the electrode pattern is formed. As shown in FIG.
  • a conductive bridge pattern may be formed on the base substrate on which the initial insulating layer A is formed, the conductive bridge pattern may include n conductive bridges W2, and n conductive bridges W2 and The n first electrodes X correspond one-to-one.
  • the preset first electrode is any one of the n first electrodes, and the preset first electrode respectively corresponds to the preset conductive bridge and the two preset second sub-electrodes, and the two preset second The sub-electrodes are respectively located on two sides of the preset first electrode, and two ends of the preset conductive bridge are respectively connected with the two preset second sub-electrodes, and constitute a preset second electrode.
  • the touch unit formed in step 501 may include: nine sub-units arranged in an array on the base substrate, and the nine sub-units are arranged in three rows and three columns, that is, the nine sub-units may include three rows. Subunits and three columns of subunits.
  • the touch unit may have an area of 25 mm 2 (square millimeters), that is, the touch unit may be a square having a side length of 5 mm (mm).
  • Each of the sub-units formed in step 501 may include: a first electrode and a second electrode formed on the base substrate, an initial insulating layer being formed between the first electrode and the second electrode, wherein the first electrode is at the second electrode
  • the upper orthographic projection area is located in the orthographic projection area of the initial insulating layer on the second electrode, and the first electrodes in each row of sub-units are sequentially connected to form a first touch line, and the second electrodes in each sub-unit are sequentially connected to form a first Two touch lines.
  • the length direction of the first electrode may be at an angle with the length direction of the second electrode, such that the first electrode has an orthographic projection area on the second electrode (ie, the first electrode is in the second The orthographic projection area of the plane where the electrode is located is located on the second electrode; in one embodiment, the length direction of the first electrode is perpendicular to the length direction of the second electrode, that is, the length direction of the first electrode and the second electrode The angle of the length direction is 90 degrees.
  • the materials of the first electrode, the conductive bridge and the second sub-electrode in the touch unit formed in step 501 can be transparent conductive materials.
  • the material of the first electrode and the second sub-electrode may be ITO, Metal Mesh or graphene, and the material of the conductive bridge may be ITO or ZnO.
  • the thickness of the first electrode and the second electrode may both be (A), it needs to be explained that Equal to 10 minus 10 square meters.
  • the initial insulating layer may have a thickness of 1.5 to 2.5 um.
  • Step 502 Connect each of the first touch lines to the control unit.
  • control unit in the embodiment of the present disclosure may be the same as the Bonding lead in the related art.
  • a first connecting line may be formed on the base substrate on which the at least two sub-units are formed by using one patterning process, and the first connecting line connects one end of each of the first touch lines with Control unit connection.
  • the material of the first connecting wire may be metal such as copper, aluminum or aluminum alloy. The thickness of the first connecting line can be
  • Step 503 Connect each second touch line to the control unit.
  • a second connecting line may be formed on the base substrate on which the at least two sub-units are formed by using one patterning process, and the second connecting line may have one end of each second touch line Control unit connection.
  • the material of the second connecting wire may be metal such as copper, aluminum or aluminum alloy.
  • the thickness of the second connecting line can also be
  • Step 504 covering the auxiliary insulating layer on the at least two subunits, the first connecting line, and the second connecting line.
  • the auxiliary insulating layer is applied by sputtering or by sputtering.
  • the touch unit further includes an auxiliary insulating layer
  • the auxiliary insulating layer covers the at least two sub-units, the first connecting line, and the second connecting line, the at least two sub-units, the first connecting line, and the second connecting line can be Protective effects.
  • the material of the auxiliary insulating layer may be an organic coating, such as the same material as OC, or an inorganic material such as SiO 2 .
  • the OGS touch display panel is widely used in production and life due to its good touch performance, light weight and thinness.
  • the touch panel can be touched on the touch display panel by using a finger or a stylus, and the touch on the touch display panel is more and more popular.
  • the tip of the stylus is thin, the contact area between the tip of the stylus and the touch display panel is a circle having a diameter of less than 2 mm. Therefore, in this case, the area corresponding to each electrode intersection is more required. Smaller, generally can be a circle with a diameter of less than 4mm.
  • a touch unit includes only one first electrode and one second electrode, that is, one touch unit in the related art only includes one electrode intersection point, when the first electrode and the second electrode fail
  • the touch control unit of the present disclosure includes at least two sub-units, that is, the touch unit includes at least two electrode intersections. When a subunit fails, the other subunits can still work normally, and the area corresponding to the touch unit on the touch display panel can still perform effective touch.
  • the embodiment of the present disclosure provides a method for manufacturing a touch unit.
  • the touch unit manufactured by the method includes at least two sub-units, and each sub-unit includes a first electrode and a second electrode, and the first electrode An initial insulating layer is formed between the first touch line and each of the second touch lines, and the first electrode and the second electrode of the touch unit intersect with each other.
  • the number of dots increases, the number of electrodes capable of generating an induced voltage in the touch unit increases.
  • the induced voltage and the preset voltage generated at the electrodes at the other intersections are increased. Differently, the induced voltage collected from the touch line is different from the preset voltage, so that effective touch can be performed and the touch precision is improved.
  • touch unit embodiment the touch unit manufacturing method embodiment, and the touch display panel embodiment can be referred to each other for reference to the convenience and brevity of the description. The examples are not described here.

Abstract

本公开提供了一种触控单元及其制造方法、触控显示面板，属于显示技术领域。触控单元包括：在衬底基板上阵列排布的至少两个子单元，每个子单元包括：形成在衬底基板上的第一电极和第二电极，第一电极与第二电极之间形成有初始绝缘层，其中，第一电极在第二电极上的正投影区域位于初始绝缘层在第二电极上的正投影区域内；其中，每行子单元中的第一电极依次连接形成第一触控线，每列子单元中的第二电极依次连接形成第二触控线，每条第一触控线和每条第二触控线均与控制单元相连接。本公开解决了触控的精度较低的问题，提高了触控的精度，本公开用于触控显示面板。

Description

触控单元及其制造方法、触控显示面板 技术领域
本公开涉及触控显示技术领域，特别涉及一种触控单元及其制造方法、触控显示面板。
背景技术
随着触控显示技术的发展，触控显示面板被越来越多地应用在触屏手机或平板电脑等电子产品上。触控显示面板不仅具有显示功能，还具有触控功能，目前，触控显示面板通常包括衬底基板以及形成在衬底基板上阵列排布的多个触控单元。
相关技术中，触控单元可以包括垂直设置的第一电极和第二电极，且第一电极和第二电极之间设置有绝缘层，每行触控单元的第一电极相连接形成触控驱动线，每列触控单元的第二电极相连接形成触控感应线，一条触控驱动线和一条触控感应线对应一个触控单元，且该触控显示面板上的所有触控驱动线和所有触控感应线均连接至控制单元。在实现该触控显示面板的触控功能时，该控制单元可以依次向每条触控驱动线输入驱动电压，并在向某一条触控驱动线输入驱动电压时，采集每条触控感应线上的感应电压。若某一条触控感应线上的感应电压为预设电压，则控制单元可以确定触控显示面板上该触控驱动线和该触控感应线所对应的触控单元所在的区域未被触摸；若某一条触控感应线上的感应电压不为预设电压，则控制单元可以确定触控显示面板上该触控驱动线和该触控感应线所对应的触控单元所在的区域被触摸，进而根据触控显示面板上被触摸的区域在触控显示面板上的位置，控制触控显示面板显示相应的图像。
由于相关技术中，触控显示面板上触控单元所在的区域内，第一电极与第二电极仅仅具有一个电极交叉点，当触控单元所在的区域内除该电极交叉点之外的区域被触摸时，触控感应线上采集到的第二电极的电压仍为预设电压，因此，无法进行有效的触控，触控的精度较低。
发明内容
为了解决触控的精度较低的问题，本公开提供了一种触控单元及其制造方法、触控显示面板。所述技术方案如下：
第一方面，提供了一种触控单元，所述触控单元包括：在衬底基板上阵列排布的至少两个子单元，
每个所述子单元包括：形成在所述衬底基板上的第一电极和第二电极，所述第一电极与所述第二电极之间形成有初始绝缘层，其中，所述第一电极在所述第二电极上的正投影区域位于所述初始绝缘层在所述第二电极上的正投影区域内；
其中，每行所述子单元中的第一电极依次连接形成第一触控线，每列所述子单元中的 第二电极依次连接形成第二触控线，每条所述第一触控线和每条所述第二触控线均与控制单元相连接。
在一个实施例中的方式，所述第一电极的长度方向与所述第二电极的长度方向垂直。
在一个实施例中的方式，所述触控单元还包括：形成在所述衬底基板上的第一连接线和第二连接线，所述触控单元中的所有所述第一触控线的一端均通过所述第一连接线与所述控制单元相连接，所述触控单元中的所有所述第二触控线的一端均通过所述第二连接线与所述控制单元相连接。
在一个实施例中的方式，所述第二电极包括：
两个第二子电极和导电桥，所述两个第二子电极分别位于所述第一电极的两侧，且分别与所述导电桥的两端相连接。
在一个实施例中的方式，所述第一电极、所述导电桥、所述第二子电极的材质均为透明导电材质。
在一个实施例中的方式，所述触控单元包括：在所述衬底基板上阵列排布的九个子单元，且所述九个子单元排成三行和三列。
在一个实施例中的方式，所述触控单元的面积为25mm2。
在一个实施例中的方式，所述第一电极和所述第二电极的厚度均为
Figure PCTCN2017093519-appb-000001
在一个实施例中的方式，所述初始绝缘层的厚度为1.5～2.5um。
在一个实施例中的方式，所述第一连接线和所述第二连接线的厚度均为
Figure PCTCN2017093519-appb-000002
在一个实施例中的方式，所述触控单元还包括：覆盖在所述至少两个子单元、所述第一连接线以及所述第二连接线上的辅助绝缘层。
第二方面，提供了一种触控显示面板，所述触控显示面板包括：衬底基板，以及形成在所述衬底基板上阵列排布的多个触控单元，所述触控单元为第一方面所述的触控单元。
第三方面，提供了一种触控单元的制造方法，所述方法包括：
在衬底基板上形成阵列排布的至少两个子单元，每个所述子单元包括：形成在所述衬底基板上的第一电极和第二电极，所述第一电极与所述第二电极之间形成有初始绝缘层，其中，所述第一电极在所述第二电极上的正投影区域位于所述初始绝缘层在所述第二电极上的正投影区域内，每行所述子单元中的第一电极依次连接形成第一触控线，每列所述子单元中的第二电极依次连接形成第二触控线；
将每条所述第一触控线与控制单元相连接；
将每条所述第二触控线与所述控制单元相连接。
在一个实施例中的方式，所述第一电极的长度方向与所述第二电极的长度方向垂直。
在一个实施例中的方式，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
在衬底基板上形成导电桥图案，所述导电桥图案包括n个导电桥，所述n为大于或等于2的整数；
在形成有所述n个导电桥的衬底基板上形成初始绝缘层；
在形成有所述初始绝缘层的衬底基板上形成电极图案，所述电极图案包括n个第一电极和2n个第二子电极，每个所述第一电极分别与一个导电桥以及两个所述第二子电极相对应；
其中，预设第一电极为所述n个第一电极中的任一第一电极，所述预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，所述两个预设第二子电极分别位于所述预设第一电极的两侧，预设导电桥的两端分别与所述两个预设第二子电极相连接，并组成预设第二电极。
在一个实施例中的方式，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
在衬底基板上形成电极图案，所述电极图案包括n个第一电极和2n个第二子电极，每个所述第一电极与两个所述第二子电极相对应，所述n为大于或等于2的整数；
在形成有所述电极图案的衬底基板上形成初始绝缘层；
在形成有所述初始绝缘层的衬底基板上形成导电桥图案，所述导电桥图案包括n个导电桥，且所述n个导电桥与所述n个第一电极一一对应；
其中，预设第一电极为所述n个第一电极中的任一第一电极，所述预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，所述两个预设第二子电极分别位于所述预设第一电极的两侧，所述预设导电桥的两端分别与所述两个预设第二子电极相连接，并组成预设第二电极。
在一个实施例中的方式，所述将每条所述第一触控线与控制单元相连接，包括：
在形成有所述至少两个子单元的衬底基板上形成第一连接线，所述第一连接线将每条所述第一触控线的一端与所述控制单元连接；
所述将每条所述第二触控线与所述控制单元相连接，包括：
在形成有所述至少两个子单元的衬底基板上形成第二连接线，所述第二连接线将每条所述第二触控线的一端与所述控制单元连接。
在一个实施例中的方式，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
在所述衬底基板上形成阵列排布的九个子单元，且所述九个子单元排成三行和三列。
在一个实施例中的方式，在所述将每条所述第二触控线与所述控制单元相连接之后，所述方法还包括：
在所述至少两个子单元、所述第一连接线以及所述第二连接线上覆盖辅助绝缘层。
综上所述，本公开提供了一种触控单元及其制造方法、触控显示面板，该触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一电极交叉点之外的区域被触摸时，其他电极交叉点处电极上产生的感应电压与预设电压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
附图说明
为了更清楚地说明本公开实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是本公开实施例提供的一种触控单元的结构示意图；
图2是本公开实施例提供的另一种触控单元的结构示意图；
图3是本公开实施例提供的一种触控显示面板的结构示意图；
图4是本公开实施例提供的一种触控单元的制造方法的方法流程图；
图5是本公开实施例提供的另一种触控单元的制造方法的方法流程图；
图6A是本公开实施例提供的一种触控单元的局部结构示意图；
图6B是本公开实施例提供的另一种触控单元的局部结构示意图；
图6C是本公开实施例提供的又一种触控单元的局部结构示意图；
图7A是本公开另一实施例提供的一种触控单元的局部结构示意图；
图7B是本公开另一实施例提供的再一种触控单元的局部结构示意图；
图7C是本公开另一实施例提供的又一种触控单元的局部结构示意图。
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，下面将结合附图对本公开实施方式作进一步地详细描述。
如图1所示，本公开实施例提供了一种触控单元0，该触控单元0可以包括：在衬底基板1上阵列排布的至少两个子单元01。图1中的k区域示出了一个子单元沿切割线ij处的剖面。
每个子单元01可以包括：形成在衬底基板1上的第一电极X和第二电极Y，第一电极X与第二电极Y之间形成有初始绝缘层A，其中，第一电极X在第二电极Y上的正投影区域位于初始绝缘层A在第二电极Y上的正投影区域内。
其中，每行子单元01中的第一电极X依次连接形成第一触控线，每列子单元01中的第二电极Y依次连接形成第二触控线，每条第一触控线和每条第二触控线均与控制单元(图1中未示出)相连接。
综上所述，本公开实施例提供了一种触控单元，该触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一电极交叉点之外的区域被触摸时，其他电极交叉点处电极上产生的感应电压与预设电 压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
可选的，本公开实施例中，第一电极X的长度方向可以与第二电极Y的长度方向存在夹角，使得第一电极X在第二电极Y上存在正投影区域(也即第一电极X在第二电极Y所在的平面的正投影区域位于第二电极Y上)；在一个实施例中，该第一电极X的长度方向与第二电极Y的长度方向垂直，也即，第一电极X的长度方向与第二电极Y的长度方向的夹角的大小为90度。
示例的，本公开实施例中的控制单元可以与相关技术中的Bonding lead(金手指)相同，触控单元01可以包括：在衬底基板1上阵列排布的九个子单元01，且该九个子单元01排成三行和三列，也即该九个子单元01可以包括三行子单元和三列子单元。该触控单元01的面积可以为25mm2(平方毫米)，也即该触控单元01可以为边长为5mm(毫米)的正方形。
如图2所示，本公开实施例提供了另一种触控单元0，在图1的基础上，该触控单元0还可以包括：形成在衬底基板1上的第一连接线P和第二连接线Q，触控单元0中的所有第一触控线的一端均通过第一连接线P与控制单元02相连接，触控单元0中的所有第二触控线的一端均通过第二连接线Q与控制单元02相连接。
由于触控单元0中包括多条第一触控线和多条第二触控线，且该多条第一触控线均连接在一起，并通过第一连接线P与控制单元02相连接，多个第二触控线均连接在一起，并通过第二连接线Q与控制单元02相连接，也即，一个触控单元0仅仅对应两条与控制单元02相连接的连接线，该触控单元0所在的触控显示面板中连接线的数量较少，在触控显示面板上所占的面积较小，因此，该触控单元0所在的触控显示面板可以具有窄边框的特性。
可选的，第二电极Y可以包括：两个第二子电极W1和导电桥W2，两个第二子电极W1分别位于第一电极X的两侧，且分别与导电桥W2的两端相连接。
第一电极X、导电桥W2、第二子电极W1的材质均可以为透明导电材质。示例的，第一电极X和第二子电极W1的材质可以为氧化铟锡(英文：Indium Tin Oxides；简称：ITO)、金属网络(英文：Metal Mesh)或者石墨烯，导电桥W2的材质可以为ITO或氧化锌(英文：zinc oxide；简称：ZnO)。第一电极X和第二电极Y的厚度均可以为
Figure PCTCN2017093519-appb-000003
Figure PCTCN2017093519-appb-000004
(埃)，需要说明的是，
Figure PCTCN2017093519-appb-000005
等于10的负10次方米。初始绝缘层A的厚度可以为1.5～2.5um(微米)。第一连接线P和第二连接线Q的厚度均可以为
Figure PCTCN2017093519-appb-000006
进一步的，该触控单元0还可以包括：覆盖在至少两个子单元01、第一连接线P以及第二连接线Q上的辅助绝缘层(图2中未示出)。由于触控单元0还包括辅助绝缘层，且辅助绝缘层覆盖在至少两个子单元01、第一连接线P以及第二连接线Q上，能够对至少两个子单元01、第一连接线P以及第二连接线Q起到保护作用。辅助绝缘层的材质可以为有机涂层，如与上层覆盖层(英文：over cover；简称：OC)的材质相同，也可以为 无机材质，如SiO2(二氧化硅)。
相关技术中，OGS(英文：One Glass Solution；中文：一体化触控)触控显示面板因触控性能佳、产品轻、薄化等特点，被人们广泛地应用在生产生活中。且相关技术中，可以采用手指或触控笔在触控显示面板上进行触控，且采用触控笔在触控显示面板上进行触控越来越受到人们的喜爱。但是，由于触控笔的笔尖较细，一般触控笔的笔尖与触控显示面板的接触面积为小于2mm直径的圆，因此，在这种情况下就更需要每个电极交叉点对应的面积较小，一般可以为直径小于4mm的圆。另外，相关技术中，一个触控单元中仅仅包含一个第一电极和一个第二电极，也即相关技术中一个触控单元仅仅包括一个电极交叉点，在该第一电极和第二电极失效时，触控显示面板上该触控单元对应的区域均无法实现有效的触控。而本公开实施例提供的触控单元中包括至少两个子单元，也即触控单元包括至少两个电极交叉点，在某一个子单元失效时，其他子单元仍可以正常工作，触控显示面板上该触控单元对应的区域仍然能够进行有效的触控。
综上所述，本公开实施例提供了一种触控单元，该触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一电极交叉点之外的区域被触摸时，其他电极交叉点处电极上产生的感应电压与预设电压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
如图3所示，本公开实施例提供了一种触控显示面板2，该触控显示面板2可以包括：衬底基板(图3中未示出)，以及形成在衬底基板上阵列排布的多个触控单元0，触控单元0可以为图1或图2所示的触控单元0。可选的，该触控显示面板2还可以包括控制单元02。
每行触控单元0中可以包括三行子单元，每行子单元中的第一电极均依次连接在一起，每列触控单元0中可以包括三列子单元，每列子单元中的第二电极均依次连接在一起。
综上所述，本公开实施例提供了一种触控显示面板，该触控显示面板中的触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一电极交叉点之外的区域被触摸时，其他电极交叉点处电极上产生的感应电压与预设电压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
如图4所示，本公开实施例提供了一种触控单元的制造方法，该触控单元的制造方法可以包括：
步骤401、在衬底基板上形成阵列排布的至少两个子单元，每个子单元包括：形成在 衬底基板上的第一电极和第二电极，第一电极与第二电极之间形成有初始绝缘层，其中，第一电极在第二电极上的正投影区域位于初始绝缘层在第二电极上的正投影区域内，每行子单元中的第一电极依次连接形成第一触控线，每列子单元中的第二电极依次连接形成第二触控线；
步骤402、将每条第一触控线与控制单元相连接；
步骤403、将每条第二触控线与控制单元相连接。
综上所述，本公开实施例提供了一种触控单元的制造方法，采用该方法制造的触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一交叉点之外的区域被触摸时，其他交叉点处电极上产生的感应电压与预设电压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
如图5所示，本公开实施例提供了另一种触控单元的制造方法，该触控单元的制造方法可以包括：
步骤501、在衬底基板上形成阵列排布的至少两个子单元。
需要说明的是，在步骤501之前，可以对衬底基板进行清洗，如采用滚刷、盘刷、洗剂喷淋、纯水喷淋等常规清洗方式对衬底基板表面进行清洁，去除玻璃基板表面的污物。
示例的，在步骤501中可以采用以下两种方式，在衬底基板上形成阵列排布的至少两个子单元：
一方面，如图6A所示，首先可以在衬底基板1上形成导电桥图案，该导电桥图案可以包括n个导电桥W2，其中，n可以为大于或等于2的整数，示例的，该导电桥图案可以包括9个导电桥W2。示例的，可以在衬底基板上采用一次构图工艺形成该导电桥图案，具体的，一次构图工艺可以包括涂覆、曝光、显影、刻蚀和剥离几个步骤。如图6B所示，在衬底基板上形成n个导电桥W2后，可以在形成有n个导电桥w2的衬底基板1上形成初始绝缘层A，具体的，可以在衬底基板1上采用一次构图工艺形成初始绝缘层A，使得初始绝缘层A能够覆盖所有的导电桥W2。如图6C所示，在衬底基板上形成初始绝缘层A后，可以在形成有初始绝缘层A的衬底基板上形成电极图案，示例的，该电极图案可以包括n个第一电极X和2n个第二子电极W1，每个第一电极X分别与一个导电桥W2以及两个第二子电极W1相对应。其中，预设第一电极为n个第一电极X中的任一第一电极，预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，两个预设第二子电极分别位于预设第一电极的两侧，预设导电桥的两端分别与两个预设第二子电极相连接，并组成预设第二电极。需要说明的是，第一电极、第二子电极和导电桥的材质可以相同，且第一电极和第二子电极可以采用一次构图工艺形成。
另一方面，如图7A所示，可以在衬底基板上形成电极图案，该电极图案可以包括n 个第一电极X和2n个第二子电极W1，每个第一电极X与两个第二子电极W1相对应，n可以为大于或等于2的整数；如图7B所示，在形成电极图案后，可以在形成有电极图案的衬底基板上形成初始绝缘层A。如图7C所示，在初始绝缘层A后，可以在形成有初始绝缘层A的衬底基板上形成导电桥图案，该导电桥图案可以包括n个导电桥W2，且n个导电桥W2与n个第一电极X一一对应。其中，预设第一电极为n个第一电极中的任一第一电极，预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，两个预设第二子电极分别位于预设第一电极的两侧，预设导电桥的两端分别与两个预设第二子电极相连接，并组成预设第二电极。
示例的，步骤501中形成的触控单元可以包括：在衬底基板上阵列排布的九个子单元，且该九个子单元排成三行和三列，也即该九个子单元可以包括三行子单元和三列子单元。该触控单元的面积可以为25mm2(平方毫米)，也即该触控单元可以为边长为5mm(毫米)的正方形。
步骤501中形成的每个子单元可以包括：形成在衬底基板上的第一电极和第二电极，第一电极与第二电极之间形成有初始绝缘层，其中，第一电极在第二电极上的正投影区域位于初始绝缘层在第二电极上的正投影区域内，每行子单元中的第一电极依次连接形成第一触控线，每列子单元中的第二电极依次连接形成第二触控线。可选的，本公开实施例中，第一电极的长度方向可以与第二电极的长度方向存在夹角，使得第一电极在第二电极上存在正投影区域(也即第一电极在第二电极所在的平面的正投影区域位于第二电极上)；在一个实施例中，该第一电极的长度方向与第二电极的长度方向垂直，也即，第一电极的长度方向与第二电极的长度方向的夹角的大小为90度。
具体的，步骤501中形成的触控单元中的第一电极、导电桥、第二子电极的材质均可以为透明导电材质。示例的，第一电极和第二子电极的材质可以为ITO、Metal Mesh或者石墨烯，导电桥的材质可以为ITO或ZnO。第一电极和第二电极的厚度均可以为
Figure PCTCN2017093519-appb-000007
Figure PCTCN2017093519-appb-000008
(埃)，需要说明的是，
Figure PCTCN2017093519-appb-000009
等于10的负10次方米。初始绝缘层的厚度可以为1.5～2.5um。
步骤502、将每条第一触控线与控制单元相连接。
示例的，本公开实施例中的控制单元可以与相关技术中的Bonding lead相同。在衬底基板上形成至少两个子单元后，可以采用一次构图工艺在形成有至少两个子单元的衬底基板上形成第一连接线，第一连接线将每条第一触控线的一端与控制单元连接。示例的，第一连接线的材质可以为金属，如铜、铝或铝合金。第一连接线的厚度可以为
Figure PCTCN2017093519-appb-000010
步骤503、将每条第二触控线与控制单元相连接。
在衬底基板上形成至少两个子单元后，可以采用一次构图工艺在形成有至少两个子单元的衬底基板上形成第二连接线，第二连接线将每条第二触控线的一端与控制单元连接。示例的，第二连接线的材质可以为金属，如铜、铝或铝合金。第二连接线的厚度也可以为
Figure PCTCN2017093519-appb-000011
步骤504、在至少两个子单元、第一连接线以及第二连接线上覆盖辅助绝缘层。
在衬底基板上形成第一电极、导电桥、第二子电极、第一连接线以及第二连接线后，可以继续在至少两个子单元、第一连接线以及第二连接线上采用涂覆或溅射的方式涂覆辅助绝缘层。
由于触控单元还包括辅助绝缘层，且辅助绝缘层覆盖在至少两个子单元、第一连接线以及第二连接线上，能够对至少两个子单元、第一连接线以及第二连接线起到保护作用。辅助绝缘层的材质可以为有机涂层，如与OC的材质相同，也可以为无机材质，如SiO2。
相关技术中，OGS触控显示面板因触控性能佳、产品轻、薄化等特点，被人们广泛地应用在生产生活中。且相关技术中，可以采用手指或触控笔在触控显示面板上进行触控，且采用触控笔在触控显示面板上进行触控越来越受到人们的喜爱。但是，由于触控笔的笔尖较细，一般触控笔的笔尖与触控显示面板的接触面积为小于2mm直径的圆，因此，在这种情况下就更需要每个电极交叉点对应的面积较小，一般可以为直径小于4mm的圆。另外，相关技术中，一个触控单元中仅仅包含一个第一电极和一个第二电极，也即相关技术中一个触控单元仅仅包括一个电极交叉点，在该第一电极和第二电极失效时，触控显示面板上该触控单元对应的区域均无法实现有效的触控；而本公开实施例提供的触控单元中包括至少两个子单元，也即触控单元包括至少两个电极交叉点，在某一个子单元失效时，其他子单元仍可以正常工作，触控显示面板上该触控单元对应的区域仍然能够进行有效的触控。
综上所述，本公开实施例提供了一种触控单元的制造方法，采用该方法制造的触控单元包括至少两个子单元，且每个子单元包括第一电极和第二电极，第一电极和第二电极之间形成有初始绝缘层，且每条第一触控线与每条第二触控线均与控制单元相连接，触控单元中第一电极与第二电极的相交叉的点增多，触控单元中能够产生感应电压的电极增多，当触控单元所在的区域内除某一交叉点之外的区域被触摸时，其他交叉点处电极上产生的感应电压与预设电压不同，从触控线上采集到的感应电压与预设电压不同，因此，能够进行有效的触控，提高了触控的精度。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的触控单元实施例、触控单元的制造方法实施例以及触控显示面板实施例均可以互相参考，本公开实施例在此不再赘述。
以上所述仅为本公开的较佳实施例，并不用以限制本公开，凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的保护范围之内。

Claims (19)

  1. 一种触控单元，所述触控单元包括：在衬底基板上阵列排布的至少两个子单元，
    每个所述子单元包括：形成在所述衬底基板上的第一电极和第二电极，所述第一电极与所述第二电极之间形成有初始绝缘层，其中，所述第一电极在所述第二电极上的正投影区域位于所述初始绝缘层在所述第二电极上的正投影区域内；
    其中，每行所述子单元中的第一电极依次连接形成第一触控线，每列所述子单元中的第二电极依次连接形成第二触控线，每条所述第一触控线和每条所述第二触控线均与控制单元相连接。
  2. 根据权利要求1所述的触控单元，其中，所述第一电极的长度方向与所述第二电极的长度方向垂直。
  3. 根据权利要求1所述的触控单元，其中，所述触控单元还包括：形成在所述衬底基板上的第一连接线和第二连接线，
    所述触控单元中的所有所述第一触控线的一端均通过所述第一连接线与所述控制单元相连接，所述触控单元中的所有所述第二触控线的一端均通过所述第二连接线与所述控制单元相连接。
  4. 根据权利要求1所述的触控单元，其中，所述第二电极包括：
    两个第二子电极和导电桥，所述两个第二子电极分别位于所述第一电极的两侧，且分别与所述导电桥的两端相连接。
  5. 根据权利要求4所述的触控单元，其中，
    所述第一电极、所述导电桥、所述第二子电极的材质均为透明导电材质。
  6. 根据权利要求3所述的触控单元，其中，
    所述触控单元包括：在所述衬底基板上阵列排布的九个子单元，且所述九个子单元排成三行和三列。
  7. 根据权利要求6所述的触控单元，其中，
    所述触控单元的面积为25mm2。
  8. 根据权利要求6所述的触控单元，其中，
    所述第一电极和所述第二电极的厚度均为
    Figure PCTCN2017093519-appb-100001
  9. 根据权利要求6所述的触控单元，其中，
    所述初始绝缘层的厚度为1.5～2.5um。
  10. 根据权利要求6所述的触控单元，其中，
    所述第一连接线和所述第二连接线的厚度均为
    Figure PCTCN2017093519-appb-100002
  11. 根据权利要求3所述的触控单元，其中，所述触控单元还包括：覆盖在所述至少两个子单元、所述第一连接线以及所述第二连接线上的辅助绝缘层。
  12. 一种触控显示面板，所述触控显示面板包括：衬底基板，以及形成在所述衬底基板上阵列排布的多个触控单元，所述触控单元为权利要求1至11任一所述的触控单元。
  13. 一种触控单元的制造方法，所述方法包括：
    在衬底基板上形成阵列排布的至少两个子单元，每个所述子单元包括：形成在所述衬底基板上的第一电极和第二电极，所述第一电极与所述第二电极之间形成有初始绝缘层，其中，所述第一电极在所述第二电极上的正投影区域位于所述初始绝缘层在所述第二电极上的正投影区域内，每行所述子单元中的第一电极依次连接形成第一触控线，每列所述子单元中的第二电极依次连接形成第二触控线；
    将每条所述第一触控线与控制单元相连接；
    将每条所述第二触控线与所述控制单元相连接。
  14. 根据权利要求13所述的方法，其中，所述第一电极的长度方向与所述第二电极的长度方向垂直。
  15. 根据权利要求13所述的方法，其中，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
    在衬底基板上形成导电桥图案，所述导电桥图案包括n个导电桥，所述n为大于或等于2的整数；
    在形成有所述n个导电桥的衬底基板上形成初始绝缘层；
    在形成有所述初始绝缘层的衬底基板上形成电极图案，所述电极图案包括n个第一电极和2n个第二子电极，每个所述第一电极分别与一个导电桥以及两个所述第二子电极相对应；
    其中，预设第一电极为所述n个第一电极中的任一第一电极，所述预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，所述两个预设第二子电极分别位于所述预设第一电极的两侧，所述预设导电桥的两端分别与所述两个预设第二子电极相连接，并组成预设第二电极。
  16. 根据权利要求13所述的方法，其中，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
    在衬底基板上形成电极图案，所述电极图案包括n个第一电极和2n个第二子电极，每个所述第一电极与两个所述第二子电极相对应，所述n为大于或等于2的整数；
    在形成有所述电极图案的衬底基板上形成初始绝缘层；
    在形成有所述初始绝缘层的衬底基板上形成导电桥图案，所述导电桥图案包括n个导电桥，且所述n个导电桥与所述n个第一电极一一对应；
    其中，预设第一电极为所述n个第一电极中的任一第一电极，所述预设第一电极分别与预设导电桥以及两个预设第二子电极相对应，所述两个预设第二子电极分别位于所述预设第一电极的两侧，所述预设导电桥的两端分别与所述两个预设第二子电极相连接，并组成预设第二电极。
  17. 根据权利要求13所述的方法，其中，所述将每条所述第一触控线与控制单元相连接，包括：
    在形成有所述至少两个子单元的衬底基板上形成第一连接线，所述第一连接线将每条所述第一触控线的一端与所述控制单元连接；
    所述将每条所述第二触控线与所述控制单元相连接，包括：
    在形成有所述至少两个子单元的衬底基板上形成第二连接线，所述第二连接线将每条所述第二触控线的一端与所述控制单元连接。
  18. 根据权利要求15至17任一所述的方法，其中，所述在衬底基板上形成阵列排布的至少两个子单元，包括：
    在所述衬底基板上形成阵列排布的九个子单元，且所述九个子单元排成三行和三列。
  19. 根据权利要求17所述的方法，其中，在所述将每条所述第二触控线与所述控制单元相连接之后，所述方法还包括：
    在所述至少两个子单元、所述第一连接线以及所述第二连接线上覆盖辅助绝缘层。
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