WO2021258469A1 - 触控电极结构及触控显示面板 - Google Patents

触控电极结构及触控显示面板 Download PDF

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Publication number
WO2021258469A1
WO2021258469A1 PCT/CN2020/103297 CN2020103297W WO2021258469A1 WO 2021258469 A1 WO2021258469 A1 WO 2021258469A1 CN 2020103297 W CN2020103297 W CN 2020103297W WO 2021258469 A1 WO2021258469 A1 WO 2021258469A1
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WO
WIPO (PCT)
Prior art keywords
touch
electrode
branch
branch portion
electrodes
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Application number
PCT/CN2020/103297
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English (en)
French (fr)
Inventor
叶剑
Original Assignee
武汉华星光电半导体显示技术有限公司
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Priority to US16/966,004 priority Critical patent/US11907451B2/en
Publication of WO2021258469A1 publication Critical patent/WO2021258469A1/zh

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Classifications

    • 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
    • G06F3/0416—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
    • G06F3/0416—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
    • G06F3/0443—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
    • 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
    • G06F3/044—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
    • G06F2203/04107—Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens

Definitions

  • This application relates to the field of display, and in particular to a touch electrode structure and a touch display panel.
  • Capacitive touch screens are widely used in various electronic interactive scene devices due to their high durability, long life, and support for multi-touch functions.
  • the working principle of the capacitive touch screen is to detect the specific position of the finger touch by detecting the change of the capacitance at the position where the finger touches.
  • the touch electrode is usually made directly in the film package
  • the thinner film encapsulation layer usually thickness ⁇ 10um
  • the distance between the touch electrode and the cathode is small, and the parasitic capacitance between the touch electrode and the cathode is large, which makes the large-size touch screen at the far end
  • the RC delay of the touch electrode channel is large, which causes the scanning frequency of the touch electrode to drop significantly, which in turn leads to a decrease in key performance such as the touch report rate.
  • the existing AMOLED On-cell display has the problem of low touch report rate, which needs to be solved.
  • the present application provides a touch electrode structure and a touch display panel to improve the AMOLED On-cell display screen, which has the problem of low touch reporting rate.
  • the present application provides a touch electrode structure, which includes:
  • the second direction and the first direction are perpendicular to each other, and the first touch electrodes and the second touch electrodes intersect to form a plurality of repeatedly arranged touch units.
  • the first touch electrodes are arranged at intervals in the second direction, and the number of the first touch electrodes is an even number.
  • the area of the first touch electrode is smaller than the area of the second touch electrode.
  • the main road electrode includes a first center line along the first direction and a second center line along the second direction, and the branch electrodes are related to the first center line.
  • a centerline is symmetrical and symmetrical about the second centerline.
  • the branch electrodes are connected to the head or tail of the main road electrode, and the branch electrodes are not in contact with each other.
  • the first branch portion is disposed on a diagonal line of the touch unit.
  • the second branch portion is self-symmetric with respect to the diagonal of the touch unit.
  • the touch unit includes four touch subunits, and the second branch portion is disposed on a diagonal line of the touch subunit.
  • the branch electrode is connected to the middle part of the main road electrode.
  • the touch unit includes four touch subunits, the first branch portion is disposed on a diagonal line of the touch subunit, and the second subunit The branch is arranged on the other diagonal of the touch subunit, and the second branch is arranged on the diagonal of the touch unit at the same time.
  • the first branch portion includes a connecting portion and a first branch, and the connecting portion connects the main road electrode and the first branch.
  • the geometric shape formed by the main road electrode is a rectangle, the long sides of the rectangle are along the first direction, and the geometric shape formed by the connecting portion is a right-angled triangle.
  • One right-angled side of the triangle is flush with the width of the main road electrode, the other right-angled side of the right-angled triangle is co-sided with the length of the main road electrode, and the hypotenuse of the right-angled triangle is the same as the first branch. side.
  • the touch electrode structure further includes a first floating electrode, and the first floating electrode is disposed between two adjacent second touch electrodes for electrical The two adjacent second touch electrodes are electrically isolated, and the first floating electrode is electrically insulated from the second touch electrode and the first touch electrode.
  • the touch electrode structure further includes a second floating electrode, and the second floating electrode is disposed between the first touch electrode and the second touch electrode, Used to electrically isolate the first touch electrode and the second touch electrode.
  • the lengths of the first branch portion and the second branch portion are both less than half of the diagonal of the touch unit, and the length of the first branch portion refers to all The length of the first branch portion in the extending direction of the first branch portion, and the length of the second branch portion refers to the length of the second branch portion in the extending direction of the second branch portion.
  • the width of the first branch portion is less than or equal to the width of the main road electrode
  • the width of the second branch portion is less than or equal to the width of the first branch portion
  • the width of the main road electrode refers to the length of the main road electrode in the second direction
  • the width of the first branch portion refers to the extension direction of the first branch portion perpendicular to the first branch portion
  • the width of the second branch portion refers to the length of the second branch portion perpendicular to the extension direction of the second branch portion.
  • the width of the main road electrode is greater than or equal to the farthest distance between five adjacent sub-pixels and less than or equal to the farthest distance between twenty adjacent sub-pixels
  • the width of the first branch portion is greater than or equal to the furthest distance between two adjacent sub-pixels and less than or equal to the furthest distance between five adjacent sub-pixels
  • the width of the second branch portion is less than or equal to five. The farthest distance between adjacent sub-pixels.
  • the width of the first floating electrode is greater than the width of one sub-pixel and less than or equal to the farthest distance between two adjacent sub-pixels.
  • the width of the second floating electrode is greater than the width of one sub-pixel and less than or equal to the farthest distance between two adjacent sub-pixels.
  • a touch display panel which includes:
  • a thin-film encapsulation layer arranged on the display layer
  • the touch control layer is arranged on the thin film packaging layer, and the touch control layer includes any one of the touch electrode structures provided in the present application.
  • the present application provides a touch electrode structure and a touch display panel.
  • the touch electrode structure includes a plurality of first touch electrodes arranged in parallel, and the first touch electrodes include A plurality of continuously conductive main road electrodes, branch electrodes connected to the main road electrodes, the branch electrodes including a first branch portion and a second branch portion, the first branch portions are connected to the main road electrode,
  • the second branch portion is cross-connected with the first branch portion and is not in contact with the main road electrode; a plurality of second touch electrodes arranged in parallel, and the second touch electrodes are continuously conductive in a second direction
  • the second touch electrode is arranged around the branch electrode and the main road electrode, and is electrically insulated from the first touch electrode; the second direction and the first direction are perpendicular to each other, so The first touch electrode and the second touch electrode intersect to form a plurality of repetitively arranged touch units.
  • the first touch electrode includes a main road electrode and a branch electrode.
  • the arrangement of the main road electrode facilitates the conduction of current in the direction of the first touch electrode channel and greatly reduces the first touch electrode.
  • the impedance of a touch electrode channel effectively reduces the RC delay of the first touch electrode, reduces the time required for screen scanning, and thereby effectively improves the touch report rate; in addition, the branch
  • the arrangement of electrodes and the arrangement of the second touch electrodes surrounding the branch electrodes and the main road electrodes improve the coupling effect between the first touch electrodes and the second touch electrodes, and are effective
  • the mutual capacitance value between the first touch electrode and the second touch electrode is increased, a higher amount of touch mutual capacitance signal is ensured, and the touch sensitivity is improved.
  • FIG. 1 is a schematic diagram of a touch electrode structure provided by an embodiment of the application.
  • FIG. 2 is a schematic diagram of the first structure of a touch unit provided by an embodiment of the application.
  • FIG. 3 is a schematic diagram of a second structure of the touch unit provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a third structure of a touch unit provided by an embodiment of the application.
  • FIG. 5 is a schematic diagram of a fourth structure of a touch unit provided by an embodiment of the application.
  • FIG. 6 is a schematic diagram of a fifth structure of a touch unit provided by an embodiment of the application.
  • FIG. 7 is a schematic diagram of a sixth structure of the touch unit provided by an embodiment of the application.
  • FIG. 8 is a schematic structural diagram of a touch display panel provided by an embodiment of the application.
  • FIG. 9 is a schematic diagram of the structure of a touch layer provided by an embodiment of the application.
  • the present application provides a touch electrode structure design, which ensures a high touch mutual capacitance signal amount while ensuring The resistance and parasitic capacitance of the touch electrode are as small as possible, so as to effectively reduce the charging time of the touch electrode, increase the scanning frequency of the touch electrode, and realize the high report rate of the touch screen.
  • FIG. 1 shows a schematic diagram of a touch electrode structure provided by an embodiment of the present application.
  • the touch electrode structure provided by the embodiment of the present invention includes:
  • the first touch electrodes 110 include a plurality of main road electrodes 111 that are connected end to end and continuously conductive along the first direction a, and branches connected to the main road electrodes 111
  • the electrode 112 the branch electrode 112 includes a first branch portion 1121 and a second branch portion 1122, the first branch portion 1121 is connected to the main road electrode 111, and the second branch portion 1122 is connected to the first branch portion 1122.
  • the branch 1121 is cross-connected and does not contact the main road electrode 111;
  • the second direction b and the first direction a are perpendicular to each other, and the first touch electrode 110 and the second touch electrode 120 intersect to form a plurality of repetitively arranged touch units 101.
  • the first touch electrode includes a main road electrode and a branch electrode.
  • the arrangement of the main road electrode facilitates the current flow in the first touch
  • the conduction in the direction of the electrode channel greatly reduces the impedance of the first touch electrode channel, thereby effectively reducing the RC delay of the first touch electrode, reducing the time required for screen scanning, and effectively improving the touch
  • the arrangement of the branch electrodes and the arrangement of the second touch electrodes surrounding the branch electrodes and the main road electrodes improve the first touch electrodes and the first
  • the coupling effect between the two touch electrodes effectively increases the mutual capacitance value between the first touch electrode and the second touch electrode, guarantees a higher amount of touch mutual capacitance signal, and improves touch Sensitivity.
  • the first touch electrode 110 is a touch driving electrode
  • the second touch electrode 120 is a touch sensing electrode.
  • the first touch electrodes 110 extend along the first direction a and are continuously connected to form an electrode channel along the first direction a, and the first touch electrodes 110 are arranged in parallel and spaced along the second direction b;
  • the second touch electrodes 120 extend along the second direction b and are continuously connected to form an electrode channel along the second direction b.
  • the second touch electrodes 120 are arranged in parallel and spaced along the first direction a.
  • the number of channels of the first touch electrode 110 is smaller than the number of channels of the second touch electrode 120, or the number of channels
  • the number of channels of the first touch electrode 110 is greater than the number of channels of the second touch electrode 120.
  • the number of channels of the first touch electrode 110 and the number of channels of the second touch electrode 120 are set to an even number, preferably a multiple of 2, 4, 8, or 16, to avoid the existence of an odd number of channels. Further, the number of channels of the first touch electrode 110 and the number of channels of the second touch electrode 120 are integer multiples of the number of electrode channels included in a single scan.
  • the electrode channels are usually scanned in groups with multiples of 2, 4, 8, 16, that is, every multiple of 2, 4, 8, 16, and the corresponding number of electrode channels are included.
  • a single square wave scanning wave group is driven, and the number of square waves included in the scanning wave group is the same as the multiple.
  • the scan wave group includes 4 single square waves, and the number of electrode channels for a single scan of the first touch electrode is 4. If the number of channels of the first touch electrode 110 is set to 17, only 16 scans of the first touch electrode channel can be completed in 4 scans, and the remaining 17th first touch electrode channel needs to be scanned again.
  • Add one scan operation that is, a total of 5 scans are required to complete the scan operations of all the first touch electrode channels; if the first touch electrode is set to 16, only 4 scans are required to complete all the scan operations.
  • the scanning operation of the first touch electrode channel in this way, the total scanning time generated will be reduced by 20% based on the 17 first touch electrode settings, which greatly increases and reduces the time required for screen scanning. Greatly improve the report rate of touch control.
  • the first touch electrodes 110 and the second touch electrodes 120 are arranged alternately to form a plurality of touch units 101 arranged repeatedly.
  • the effective area of the first touch electrode 110 is smaller than the effective area of the second touch electrode 120, and the parasitic capacitance formed between the first touch electrode 110 and the cathode, It is smaller than the parasitic capacitance formed between the second touch electrode 120 and the cathode.
  • the parasitic capacitance between the first touch electrode 110 and the cathode is less than 8 picofarads, and the parasitic capacitance between the second touch electrode 120 and the cathode is less than 10 picofarads.
  • the touch electrode structure provided by the embodiment of the present application reduces the parasitic capacitance between the entire first touch electrode channel and the cathode, thereby effectively reducing the RC delay of the first touch electrode channel and reducing This saves the time required for screen scanning, thereby effectively improving the touch report rate.
  • the first touch electrode 110 is continuously conductive along the first direction a, as shown in FIG. Drive signal.
  • the second touch electrode 120 is continuously conductive along the second direction b, as shown in the diamond-shaped chain structure along the second direction b in FIG. 1, for transmitting touch sensing signals.
  • the first touch electrode 110 and the second touch electrode 120 are insulated from each other, the first direction a is the vertical direction in the figure, and the second direction b is the horizontal direction in the figure.
  • the first touch electrode 110 includes a rectangular main road electrode 111, the long side of the rectangular main road electrode 111 is along the first direction a, and the width of the rectangular main road electrode 111 is the width of the rectangular main road electrode 111 in the figure.
  • the lateral distance is greater than or equal to the farthest distance between five adjacent sub-pixels and less than or equal to the farthest distance between twenty adjacent sub-pixels.
  • FIG. 2 shows a schematic diagram of a first structure of a touch unit provided by an embodiment of the present application.
  • Two adjacent main road electrodes 111 are connected by a channel electrode 113.
  • the channel electrode 113 includes a first channel portion 1131 and a second channel portion 1132.
  • the first channel portion 1131 is connected to the main road electrode 111.
  • the second channel portion 1132 is connected to the first channel portion 1131.
  • the first channel portion 1131 and the second channel portion 1132 are arranged in the same layer as the main road electrode 111, and two adjacent second touch electrodes 120 are electrically connected by bridge electrodes.
  • the branch electrode 112 is connected to the head or tail of the main road electrode 111 and forms a predetermined angle with the main road electrode 111, and the predetermined angle is 30° to 60°.
  • the main road electrode 111 includes a first center line along the first direction a and a second center line along the second direction b.
  • the branch electrodes 112 are related to the The first center line is bilaterally symmetrical, and is symmetrical about the second center line up and down. As shown in FIG. 1, each of the main road electrodes 111 is connected to four of the branch electrodes 112, and the branch electrodes 112 are respectively regularly arranged outside the two long sides of the main road electrode 111.
  • the branch electrode 112 includes a connecting portion 1124 and a first branch 1123, and the connecting portion 1124 connects the main road electrode 111 and the first branch 1123.
  • the shape of the connecting portion 1124 is a right-angled triangle, one right-angled side of the right-angled triangle is flush with the width of the main road electrode 111, and the other right-angled side of the right-angled triangle is the same as the length of the main road electrode 111.
  • Side, the hypotenuse of the right-angled triangle and the first branch 1123 are common, the angle between the hypotenuse of the right-angled triangle and the right-angled side that is flush with the main road electrode width is the preset angle, so The preset angle is 30° to 60°.
  • the shape of the connecting portion 1124 is a right-angled isosceles triangle, and the first branch 1123 is connected to the head and tail of the main road electrode 111 through the connecting portion 1124, and is in alignment with the main road electrode 111. 45° included angle.
  • the first branch 1123 is located on the diagonal of the touch unit and is self-symmetrical with respect to the diagonal. At the same time, the other diagonal with respect to the touch unit is symmetrical to each other.
  • the touch control unit includes four touch control subunits, and the first branch 1123 is also self-symmetric about the diagonal of the touch control subunit.
  • the diagonal line of the touch subunit refers to a diagonal line intersecting the diagonal line of the touch unit, and the following embodiments are all described with this limitation.
  • the shape of the first branch 1123 is a regular rectangle.
  • the length of the first branch 1123 is less than half of the diagonal length of the touch unit, that is, less than the diagonal length of the touch subunit, and the width of the first branch 1123 is greater than or equal to two adjacent subunits.
  • the farthest distance between pixels is less than or equal to the farthest distance between five adjacent sub-pixels.
  • the length of the first branch 1123 refers to the length of the first branch 1123 in the extending direction of the first branch 1123, and the width of the first branch 1123 refers to the length of the first branch 1123 perpendicular to the The length of the first branch 1123 in the extending direction.
  • the first branches 1123 do not touch each other.
  • the coupling area between the first touch electrode 110 and the second touch electrode 120 is increased.
  • the coupling effect is improved, the mutual capacitance value between the first touch electrode 110 and the second touch electrode 120 is effectively increased, a higher amount of touch mutual capacitance signal is ensured, and the touch sensitivity is improved.
  • FIG. 3 shows a schematic diagram of the second structure of the touch unit provided in the embodiment of the present application.
  • the parts of this embodiment that are the same as those of the first embodiment will not be repeated here.
  • the difference between this embodiment and the first embodiment is:
  • the first channel portion 1133 and the main road electrode 111 are arranged in the same layer, and the second channel portion 1134 and the main road electrode 111 are arranged in a different layer to form a bridge electrode.
  • the two adjacent main road electrodes 111 are respectively connected to the two first channel portions 1133, and the two first channel portions 1133 are not connected to each other in the plane, and are connected to the same second channel through a via hole. ⁇ 1134 ⁇ 1134 connection.
  • the second channel portion 1134 may be a double-fold line bridge electrode as shown in FIG. 3, or may be a rectangular single bridge electrode along the first direction a.
  • the shape of the first branch 1123 is a long zigzag shape, and the side of the first branch 1123 includes a zigzag protrusion.
  • the branch electrodes 112 including the long zigzag-shaped first branch electrodes 1123 are arranged at the head or tail of the main road electrode 111.
  • the zigzag protrusions further increase the first touch electrode 110 and the second touch electrode.
  • the coupling area between the control electrodes 120 further improves the coupling effect, increases the mutual capacitance value between the first touch electrode 110 and the second touch electrode 120, and ensures high touch mutual capacitance The amount of semaphore improves touch sensitivity.
  • FIG. 4 shows a third structural schematic diagram of the touch unit provided in the embodiment of the present application.
  • the parts of this embodiment that are the same as the first and second embodiments will not be repeated here.
  • the difference between this embodiment and the first and second embodiments is:
  • Each of the branch electrodes 112 includes a first branch portion 1121 and a second branch portion 1122.
  • the first branch portion 1121 further includes a first branch 1123 and a connecting portion 1124.
  • the first branch 1123 is connected to the main road electrode 111 through the connection portion 1124, and is preset with the main road electrode 111.
  • the angle, the preset angle is 30° to 60°; the second branch portion 1122 and the first branch portion 1121 are intersected, and are not in contact with the main road electrode 111.
  • the second branch portion 1122 is located on the diagonal of the touch subunit, and is self-symmetrical with respect to the diagonal of the touch unit. Further, the second branch portion 1122 is also self-symmetrical with respect to the diagonal of the touch subunit.
  • the shape of the first branch 1123 and the second branch portion 1122 may be a rectangle as shown in FIG. 4, or a long zigzag shape as shown in FIG. 3, or other shapes, which will not be described here. limited.
  • the length of the second branch portion 1122 is less than the length of the diagonal of the touch subunit, and the width of the second branch portion 1122 is less than or equal to the farthest distance between five adjacent sub-pixels.
  • the length of the second branch portion 1122 refers to the length of the second branch portion 1122 in the extending direction of the second branch portion 1122, and the width of the second branch portion 1122 refers to the second branch portion 1122 The length in a direction perpendicular to the extension direction of the second branch portion 1122.
  • a branch electrode 112 including one first branch portion 1121 and one second branch portion 1122 is provided at the head or tail of the main road electrode 111. Compared with the first embodiment, the branch electrode 112 is further increased. The coupling area between the first touch electrode 110 and the second touch electrode 120 is increased, the coupling effect is further improved, and the interaction between the first touch electrode 110 and the second touch electrode 120 is improved. The capacitance value ensures a high touch mutual capacitance signal and improves touch sensitivity.
  • FIG. 5 shows a schematic diagram of the fourth structure of the touch unit provided in the embodiment of the present application.
  • the parts of this embodiment that are the same as those of the third embodiment will not be repeated here.
  • the difference between this embodiment and the third embodiment is:
  • Each of the branch electrodes 112 includes a first branch portion 1121 and a plurality of second branch portions 1122, and the second branch portions 1122 are parallel to each other.
  • the shape and size of the second branch portion 1122 can be the same or different.
  • the length distribution of the second branch portion 1122 may decrease in a direction away from the diagonal of the touch subunit, and the width distribution of the second branch portion 1122 may also be diagonally away from the touch subunit. The direction of the line decreases sequentially.
  • branch electrodes 112 including the one first branch portion 1121 and a plurality of second branch portions 1122 are provided at both ends of the main road electrode 111.
  • the coupling area between the first touch electrode 110 and the second touch electrode 120 is further increased, the coupling effect is further improved, and the first touch electrode 110 and the second touch electrode 120 are improved.
  • the mutual capacitance value between the two ensures a high touch mutual capacitance signal and improves touch sensitivity.
  • the touch electrode structure further includes a first floating electrode 130, and the first floating electrode 130 is disposed between two adjacent second touch electrodes 120 , And are insulated from the second touch electrode 120, so as to effectively isolate the second touch electrode 120 of adjacent channels electrically and prevent the adjacent second touch electrode channels from being short-circuited.
  • the first floating electrode 130 is insulated from the first touch electrode 110 at the same time.
  • the width of the first floating electrode 130 is greater than the width of one sub-pixel and less than or equal to the farthest distance between two adjacent sub-pixels.
  • the first touch electrode 110 and the second touch electrode 120 are insulated from each other through a fracture, and the distance between the first touch electrode 110 and the second touch electrode 120 is relatively short, thereby This ensures that the first touch electrode 110 and the second touch electrode 120 have a large side-field mutual capacitance value, which is beneficial to improve the performance of the first touch electrode 110 and the second touch electrode when a finger is touched.
  • the amount of change in the side field capacitance between the electrodes 120 increases the amount of touch mutual capacitance signal and improves the touch sensitivity.
  • FIG. 6 shows a fifth structural schematic diagram of the touch unit provided in the embodiment of the present application.
  • the same parts of this embodiment and the fifth embodiment will not be repeated here.
  • the difference between this embodiment and the fifth embodiment is:
  • the touch electrode structure further includes a second floating electrode 140, which is disposed between the first touch electrode 110 and the second touch electrode 120, and is used to electrically isolate the first touch electrode 110 And the second touch electrode 120.
  • the width of the second floating electrode 140 is greater than the width of one sub-pixel and less than or equal to the farthest distance between two adjacent sub-pixels. The second floating electrode 140 can effectively reduce the basic mutual capacitance value, thereby increasing the rate of change of the basic mutual capacitance value when touched by a finger.
  • FIG. 7 shows a sixth structural schematic diagram of the touch unit provided in the embodiment of the present application.
  • the parts of this embodiment that are the same as the third embodiment will not be repeated here.
  • the difference between this embodiment and the third embodiment lies in:
  • the branch electrode 112 is connected to the middle part of the main road electrode 111.
  • the first branch portion 1121 is disposed on the diagonal of the touch subunit, and the second branch portion 1122 is cross-connected with the first branch portion 1121.
  • the first branch portions 1121 may or may not be in contact with each other.
  • the second branch portions 1122 are arranged on the diagonal of the touch unit, and the second branch portions 1122 are not in contact with each other.
  • the second branch portion 1122 is self-symmetrical with respect to the diagonal of the touch unit.
  • the second branch portion 1122 is self-symmetrical with respect to the diagonal of the touch subunit.
  • the first touch electrode 110 and the second touch electrode 110 are enlarged.
  • the coupling area between the touch electrodes 120 further improves the coupling effect, increases the mutual capacitance value between the first touch electrode 110 and the second touch electrode 120, and ensures a high touch mutual capacitance.
  • the capacity of the signal is improved, and the touch sensitivity is improved.
  • the first touch electrode 110, the second touch electrode 120, the first floating electrode 130, and the second floating electrode 140 may be transparent and conductive.
  • the thin film may also be an opaque grid-like metal.
  • the metal grid avoids the light-emitting area of the sub-pixels, that is, the grid lines of the metal grid correspond to the spacer regions of the sub-pixels, and the sub-pixels correspond to the grid lines The enclosed penetrating area.
  • FIG. 8 shows a schematic structural diagram of the touch display panel provided by an embodiment of the present application.
  • the touch display panel includes:
  • the thin film encapsulation layer 720 is disposed on the display layer 710;
  • the touch layer 730 is disposed on the thin-film encapsulation layer 720; the touch layer 730 includes the touch electrode structure provided by the embodiment of the present application, and the touch electrode structure includes: a plurality of first touch electrodes arranged in parallel
  • the first touch electrode includes a plurality of main road electrodes that are connected end to end in a first direction and are continuously conductive, and a branch electrode connected to the main road electrode, and the branch electrode includes a first branch portion and a second branch portion.
  • a branch part the first branch part is connected to the main road electrode, the second branch part is cross-connected with the first branch part and does not contact the main road electrode; a plurality of second branches arranged in parallel Touch electrodes, the second touch electrodes are continuously conductive in a second direction, the second touch electrodes are arranged around the branch electrodes and the main road electrodes, and are electrically connected to the first touch electrodes Insulation; the second direction and the first direction are perpendicular to each other, the first touch electrode and the second touch electrode cross to form a number of repetitively arranged touch units.
  • the touch display panel includes the touch electrode structure provided in the embodiments of the present application.
  • the first touch electrode includes a main road electrode.
  • branch electrodes the arrangement of the main road electrodes is conducive to the conduction of current in the direction of the first touch electrode channel, greatly reducing the impedance of the first touch electrode channel, thereby effectively reducing the first touch electrode
  • the RC delay time reduces the time required for screen scanning, thereby effectively improving the report rate of touch; in addition, the arrangement of the branch electrode and the second touch electrode surround the branch electrode and the The arrangement of the main road electrode improves the coupling effect between the first touch electrode and the second touch electrode, and effectively improves the coupling effect between the first touch electrode and the second touch electrode.
  • the mutual capacitance value ensures a high touch mutual capacitance signal and improves touch sensitivity.
  • FIG. 9 shows a schematic structural diagram of a touch layer provided by an embodiment of the present application.
  • the touch layer 730 includes:
  • the first metal layer is disposed on the buffer layer 731, and is patterned to form a bridge electrode 1134;
  • the first insulating layer 732 covers the bridge electrode 1134;
  • the second metal layer is disposed on the first insulating layer 732 to form a first touch electrode 110 and a second touch electrode 120 by patterning.
  • the first touch electrode 110 is connected to the bridge electrode 1134 through a via hole. Connected, so as to achieve continuous conduction of the first touch electrode 110 in the first direction;
  • the second insulating layer 733 covers the first touch electrode 110 and the second touch electrode 120.
  • the first touch electrode 110 includes a channel electrode arranged in the same layer as the channel electrode, and the channel electrode is connected to two adjacent main road electrodes, so as to realize the first touch electrode. 110 is continuously conductive in the first direction; at the same time, the second touch electrode 120 is continuously conductive in the second direction through bridge electrodes arranged in different layers.
  • first touch electrode 110 and the second touch electrode 120 are arranged in different layers.
  • the touch display panel provided in this embodiment includes the touch electrode structure provided in the embodiment of the application, it has the beneficial effects of the touch electrode structure provided in the embodiment of the application, and the specific working principle and implementation For the method, please refer to the above-mentioned embodiment, which will not be repeated here.
  • the embodiments of the present application provide a touch electrode structure and a touch display panel.
  • the touch electrode structure includes a plurality of first touch electrodes arranged in parallel, and the first touch electrodes include end to end in a first direction.
  • the first touch electrode includes a main road electrode and a branch electrode.
  • the arrangement of the main road electrode facilitates the conduction of current in the direction of the first touch electrode channel and greatly reduces the first touch electrode.
  • the impedance of a touch electrode channel effectively reduces the RC delay of the first touch electrode, reduces the time required for screen scanning, and thereby effectively improves the touch report rate; in addition, the branch
  • the arrangement of electrodes and the arrangement of the second touch electrodes surrounding the branch electrodes and the main road electrodes improve the coupling effect between the first touch electrodes and the second touch electrodes, and are effective
  • the mutual capacitance value between the first touch electrode and the second touch electrode is increased, a higher amount of touch mutual capacitance signal is ensured, and the touch sensitivity is improved.

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Abstract

本申请提供了一种触控电极结构及触控显示面板，触控电极结构包括：第一触控电极，包括沿第一方向首尾相连且连续导通的多个主干道电极，和与主干道电极连接的分支电极，分支电极包括交叉设置的第一分支部和第二分支部；第二触控电极。减小了第一触控电极通道的RC延时，降低了屏体扫描需要的时间，提高了触控的报点率。

Description

触控电极结构及触控显示面板 技术领域
本申请涉及显示领域，尤其涉及一种触控电极结构及触控显示面板。
 背景技术
电容式触摸屏由于其高耐久性，长寿命，并且支持多点触控的功能，广泛应用于各种电子交互场景设备中。电容式触摸屏的工作原理是通过检测手指触摸位置处电容量的变化来检测手指触摸的具体位置。
目前针对柔性AMOLED（Active-matrix organic light-emitting diode，有源矩阵有机发光二极体或主动矩阵有机发光二极体）On-cell（在AMOLED盖板上集成触控层）显示屏，其触控电极通常直接制作在薄膜封装层上表面，然而由于薄膜封装层较薄（通常厚度＜10um），触控电极与阴极之间的距离较小，触控电极与阴极之间的寄生电容较大，使得大尺寸触摸屏远端的触控电极通道的RC延时大，从而导致触控电极的扫描频率大幅下降，进而导致触控报点率等关键性能降低。
因此，现有AMOLED On-cell显示屏存在触控报点率低的问题，需要解决。
 技术问题
本申请提供一种触控电极结构及触控显示面板，以改进AMOLED On-cell显示屏存在触控报点率低的问题。
 技术解决方案
本申请提供一种触控电极结构，其包括：
多个平行设置的第一触控电极，所述第一触控电极包括沿第一方向首尾相连且连续导通的多个主干道电极，与所述主干道电极连接的分支电极，所述分支电极包括第一分支部和第二分支部，所述第一分支部与所述主干道电极连接，所述第二分支部与所述第一分支部交叉连接、且不与所述主干道电极接触；
多个平行设置的第二触控电极，所述第二触控电极沿第二方向连续导通，所述第二触控电极围绕所述分支电极和所述主干道电极设置，且与所述第一触控电极电性绝缘；
所述第二方向和所述第一方向相互垂直，所述第一触控电极和所述第二触控电极交叉形成若干重复排列的触控单元。
在本申请提供的触控电极结构中，所述第一触控电极在所述第二方向上间隔排列，所述第一触控电极的数量为偶数。
在本申请提供的触控电极结构中，在所述触控单元内，所述第一触控电极的面积小于所述第二触控电极的面积。
在本申请提供的触控电极结构中，所述主干道电极包括沿所述第一方向的第一中心线，和沿所述第二方向的第二中心线，所述分支电极关于所述第一中心线对称，且关于所述第二中心线对称。
在本申请提供的触控电极结构中，所述分支电极与所述主干道电极的首部或尾部连接，且所述分支电极彼此不接触。
在本申请提供的触控电极结构中，所述第一分支部设置于所述触控单元的对角线上。
在本申请提供的触控电极结构中，所述第二分支部关于所述触控单元的对角线自对称。
在本申请提供的触控电极结构中，所述触控单元包括四个触控子单元，所述第二分支部设置于所述触控子单元的对角线上。
在本申请提供的触控电极结构中，所述分支电极与所述主干道电极的中间部连接。
在本申请提供的触控电极结构中，所述触控单元包括四个触控子单元，所述第一分支部设置于所述触控子单元的一条对角线上，所述第二分支部设置于所述触控子单元的另一条对角线上，所述第二分支部同时设置于所述触控单元的对角线上。
在本申请提供的触控电极结构中，所述第一分支部包括连接部和第一分支，所述连接部连接所述主干道电极和所述第一分支。
在本申请提供的触控电极结构中，所述主干道电极构成的几何形状为矩形，所述矩形的长边沿所述第一方向，所述连接部构成的几何形状为直角三角形，所述直角三角形的一条直角边与所述主干道电极的宽平齐，所述直角三角形的另一条直角边与所述主干道电极的长共边，所述直角三角形的斜边与所述第一分支共边。
在本申请提供的触控电极结构中，所述触控电极结构还包括第一悬浮电极，所述第一悬浮电极设置于相邻的两个所述第二触控电极之间，用于电性隔离相邻的两个所述第二触控电极，所述第一悬浮电极与所述第二触控电极、所述第一触控电极电性绝缘。
在本申请提供的触控电极结构中，所述触控电极结构还包括第二悬浮电极，所述第二悬浮电极设置于所述第一触控电极和所述第二触控电极之间，用于电性隔离所述第一触控电极和所述第二触控电极。
在本申请提供的触控电极结构中，所述第一分支部、所述第二分支部的长均小于所述触控单元对角线的一半，所述第一分支部的长是指所述第一分支部在所述第一分支部延伸方向上的长度，所述第二分支部的长是指所述第二分支部在所述第二分支部延伸方向上的长度。
在本申请提供的触控电极结构中，所述第一分支部的宽小于等于所述主干道电极的宽，所述第二分支部的宽小于等于所述第一分支部的宽，所述主干道电极的宽是指所述主干道电极在所述第二方向上的长度，所述第一分支部的宽是指所述第一分支部在垂直于所述第一分支部延伸方向上的长度，所述第二分支部的宽是指所述第二分支部在垂直于所述第二分支部延伸方向上的长度。
在本申请提供的触控电极结构中，所述主干道电极的宽大于等于五个相邻子像素之间的最远距离、且小于等于二十个相邻子像素之间的最远距离，所述第一分支部的宽大于等于两个相邻子像素之间的最远距离、且小于等于五个相邻子像素之间的最远距离，所述第二分支部的宽小于等于五个相邻子像素之间的最远距离。
在本申请提供的触控电极结构中，所述第一悬浮电极的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。
在本申请提供的触控电极结构中，所述第二悬浮电极的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。
同时，本申请提供一种触控显示面板，其包括：
显示层；
薄膜封装层，设置于所述显示层上；
触控层，设置于所述薄膜封装层上，所述触控层包括本申请提供的任一所述触控电极结构。
 有益效果
本申请提供了一种触控电极结构及触控显示面板，所述触控电极结构包括：多个平行设置的第一触控电极，所述第一触控电极包括沿第一方向首尾相连且连续导通的多个主干道电极，与所述主干道电极连接的分支电极，所述分支电极包括第一分支部和第二分支部，所述第一分支部与所述主干道电极连接，所述第二分支部与所述第一分支部交叉连接、且不与所述主干道电极接触；多个平行设置的第二触控电极，所述第二触控电极沿第二方向连续导通，所述第二触控电极围绕所述分支电极和所述主干道电极设置，且与所述第一触控电极电性绝缘；所述第二方向和所述第一方向相互垂直，所述第一触控电极和所述第二触控电极交叉形成若干重复排列的触控单元。在所述触控电极结构中，所述第一触控电极包括主干道电极和分支电极，所述主干道电极的设置有利于电流在第一触控电极通道方向上的传导，大大降低了第一触控电极通道的阻抗，从而有效减小了所述第一触控电极的RC延时，降低了屏体扫描所需要的时间，进而有效提高触控的报点率；另外，所述分支电极的设置、以及所述第二触控电极围绕所述分支电极和所述主干道电极的设置，提高了所述第一触控电极和所述第二触控电极之间的耦合效果，有效提高了所述第一触控电极和所述第二触控电极之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为本申请实施例提供的触控电极结构的示意图。
图2为本申请实施例提供的触控单元的第一种结构示意图。
图3为本申请实施例提供的触控单元的第二种结构示意图。
图4为本申请实施例提供的触控单元的第三种结构示意图。
图5为本申请实施例提供的触控单元的第四种结构示意图。
图6为本申请实施例提供的触控单元的第五种结构示意图。
图7为本申请实施例提供的触控单元的第六种结构示意图。
图8为本申请实施例提供的触控显示面板的结构示意图。
图9为本申请实施例提供的触控层的结构示意图。
 本发明的实施方式
针对现有AMOLED On-cell显示屏存在触控报点率低的问题，本申请提供一种触控电极结构设计，该触控电极结构设计在保证较高触控互容信号量的同时，确保触控电极的电阻和寄生电容尽可能小，从而有效减小触控电极的充电时间，提高触控电极的扫描频率，实现触摸屏的高报点率。
请参照图1，图1示出了本申请实施例提供的触控电极结构的示意图。如图所示，本发明实施例提供的触控电极结构包括：
多个平行设置的第一触控电极110，所述第一触控电极110包括沿第一方向a首尾相连且连续导通的多个主干道电极111，与所述主干道电极111连接的分支电极112，所述分支电极112包括第一分支部1121和第二分支部1122，所述第一分支部1121与所述主干道电极111连接，所述第二分支部1122与所述第一分支部1121交叉连接、且不与所述主干道电极111接触；
多个平行设置的第二触控电极120，所述第二触控电极120沿第二方向b连续导通，所述第二触控电极120围绕所述分支电极112和所述主干道电极111设置，且与所述第一触控电极110彼此绝缘；
所述第二方向b和所述第一方向a相互垂直，所述第一触控电极110和所述第二触控电极120交叉形成若干重复排列的触控单元101。
本实施例提供一种触控电极结构，在所述触控电极结构中，所述第一触控电极包括主干道电极和分支电极，所述主干道电极的设置有利于电流在第一触控电极通道方向上的传导，大大降低了第一触控电极通道的阻抗，从而有效减小了所述第一触控电极的RC延时，降低了屏体扫描所需要的时间，进而有效提高触控的报点率；另外，所述分支电极的设置、以及所述第二触控电极围绕所述分支电极和所述主干道电极的设置，提高了所述第一触控电极和所述第二触控电极之间的耦合效果，有效提高了所述第一触控电极和所述第二触控电极之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在本申请实施例提供的触控电极结构中，所述第一触控电极110为触控驱动电极，所述第二触控电极120为触控感测电极。所述第一触控电极110沿第一方向a延伸且连续导通，构成沿所述第一方向a的电极通道，所述第一触控电极110沿第二方向b平行间隔排列；所述第二触控电极120沿所述第二方向b延伸且连续导通，构成沿所述第二方向b的电极通道，所述第二触控电极120沿所述第一方向a平行间隔排列。
在本申请实施例提供的触控电极结构中，可以是如图1所示，所述第一触控电极110的通道数量小于所述第二触控电极120的通道数量，也可以是所述第一触控电极110的通道数量大于所述第二触控电极120的通道数量。所述第一触控电极110的通道数量、所述第二触控电极120的通道数量设置为偶数，优选2、4、8、16的倍数，避免奇数个通道数量的存在。进一步的，所述第一触控电极110的通道数量、所述第二触控电极120的通道数量，为单次扫描包括的电极通道数量的整数倍。
在第一触控电极进行扫描时，通常是以2、4、8、16的倍数个电极通道进行分组扫描的，即每2、4、8、16的倍数个电极通道，被包含对应个数单一方波的扫描波组进行驱动，该扫描波组包含的方波数与所述倍数相同。例如，扫描波组包含4个单一方波，第一触控电极单次扫描的电极通道数量为4。若所述第一触控电极110的通道数设置为17条，4次扫描只能完成16条所述第一触控电极通道的扫描，剩余的第17条第一触控电极通道还需要再增加一次扫描操作，即总共需要5次扫描才能完成所有所述第一触控电极通道的扫描操作；若所述第一触控电极设置为16条，则仅需要4次扫描就能完成所有所述第一触控电极通道的扫描操作，这样，产生的总扫描时间将在17条所述第一触控电极设置的基础上减少20%，这大大增降低了屏体扫描所需要的时间，极大的提高了触控的报点率。
如图1所示，所述第一触控电极110和所述第二触控电极120交错排列，形成若干重复排列的触控单元101。在所述触控单元101内，所述第一触控电极110的有效面积小于所述第二触控电极120的有效面积，所述第一触控电极110与阴极之间形成的寄生电容，小于所述第二触控电极120与所述阴极之间形成的寄生电容。在所述触控单元内，所述第一触控电极110与阴极之间的寄生电容小于8皮法，所述第二触控电极120与所述阴极之间的寄生电容小于10皮法。
本申请实施例提供的触控电极结构，减小了整个第一触控电极通道与所述阴极之间的寄生电容，从而有效减小了所述第一触控电极通道的RC延时，降低了屏体扫描所需要的时间，进而有效提高触控的报点率。
在第一种实施例中，请参照图1，第一触控电极110沿第一方向a连续导通，如图1中沿所述第一方向a的菱形链状结构，用于传输触控驱动信号。第二触控电极120沿第二方向b连续导通，如图1中沿所述第二方向b的菱形链状结构，用于传输触控感测信号。其中，所述第一触控电极110和所述第二触控电极120彼此绝缘，所述第一方向a为图中纵向竖直方向，所述第二方向b为图中横向水平方向。
第一触控电极110包括矩形主干道电极111，所述矩形主干道电极111的长边沿所述第一方向a，且所述矩形主干道电极111的宽，即图中矩形主干道电极111的横向距离大于等于五个相邻子像素之间的最远距离、且小于等于二十个相邻子像素之间的最远距离。通过在所述第一触控电极110的电极通道方向上，设置贯通整个电极通道的矩形主干道电极111，同时保证所述矩形主干道电极111具有一定的通道宽度，大大降低了第一触控电极通道的阻抗，有利于所述第一触控电极通道上电流的传导，从而有效减小了第一触控电极的RC延时，降低了屏体扫描所需要的时间，进而有效提高了触控的报点率。
请参照图2，图2示出了本申请实施例提供的触控单元的第一种结构示意图。两个相邻的主干道电极111通过通道电极113连接，所述通道电极113包括第一通道部1131和第二通道部1132，所述第一通道部1131连接所述主干道电极111，所述第二通道部1132连接所述第一通道部1131。所述第一通道部1131和所述第二通道部1132与所述主干道电极111同层设置，两相邻的第二触控电极120通过桥接电极实现电连接。
所述分支电极112与所述主干道电极111的首部或尾部连接，且与所述主干道电极111成预设角度，所述预设角度为30°至60°。在所述触控单元内，所述主干道电极111包括沿所述第一方向a的第一中心线，和沿所述第二方向b的第二中心线，所述分支电极112关于所述第一中心线左右对称，且关于所述第二中心线上下对称。如图1所示，每一所述主干道电极111连接四个所述分支电极112，所述分支电极112分别规则的设置于所述主干道电极111的两个长边外侧。
分支电极112包括连接部1124和第一分支1123，所述连接部1124连接所述主干道电极111和所述第一分支1123。所述连接部1124的形状为直角三角形，所述直角三角形的一条直角边与所述主干道电极111的宽平齐，所述直角三角形的另一条直角边与所述主干道电极111的长共边，所述直角三角形的斜边与所述第一分支1123共边，所述直角三角形的斜边和与所述主干道电极宽平齐的直角边的夹角为所述预设角度，所述预设角度为30°至60°。
进一步的，所述连接部1124的形状为直角等腰三角形，所述第一分支1123通过所述连接部1124连接至所述主干道电极111的首部和尾部，且与所述主干道电极111成45°夹角。所述第一分支1123位于所述触控单元的对角线上，且关于所述对角线自对称，同时，关于所述触控单元的另一条对角线左右相互对称。进一步的，所述触控单元包括四个触控子单元，所述第一分支1123还关于所述触控子单元的对角线自对称。在本发明的实施例中，所述触控子单元的对角线是指与所述触控单元的对角线交叉的一条对角线，下述实施例中均以该限定进行说明。
在本实施例中，如图2所示，所述第一分支1123的形状为规则的矩形。所述第一分支1123的长小于所述触控单元对角线长度的一半，即小于所述触控子单元的对角线长度，所述第一分支1123的宽大于等于两个相邻子像素之间的最远距离、且小于等于五个相邻子像素之间的最远距离。所述第一分支1123的长是指所述第一分支1123在所述第一分支1123延伸方向上的长度，所述第一分支1123的宽是指所述第一分支1123在垂直于所述第一分支1123延伸方向上的长度。所述第一分支1123彼此不接触。
在本实施例通过在所述主干道电极111的首部或尾部设置包括矩形第一分支1123的分支电极112，增大了第一触控电极110和第二触控电极120之间的耦合面积，提高了耦合效果，有效提高了所述第一触控电极110和所述第二触控电极120之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在第二种实施例中，如图3所示，图3示出了本申请实施例提供的触控单元的第二种结构示意图。本实施例与第一种实施例相同的部分在此不再赘述，具体可参照第一种实施例。本实施例与第一种实施例的不同之处在于：
第一通道部1133与主干道电极111同层设置，第二通道部1134与主干道电极111异层设置，构成桥接电极。相邻的两个所述主干道电极111分别与两个所述第一通道部1133连接，两个所述第一通道部1133在平面内彼此不连接，通过过孔与同一所述第二通道部1134连接。所述第二通道部1134可以是如图3所示的双折线桥接电极，也可以是沿所述第一方向a的矩形单桥接电极。
第一分支1123的形状为长条形的锯齿状，在所述第一分支1123的侧边包括锯齿状的凸起。
本实施例通过在所述主干道电极111的首部或尾部设置包括长条锯齿状第一分支电极1123的分支电极112，锯齿状的凸起进一步增大了第一触控电极110和第二触控电极120之间的耦合面积，进一步提高了耦合效果，提高了所述第一触控电极110和所述第二触控电极120之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在第三种实施例中，如图4所示，图4示出了本申请实施例提供的触控单元的第三种结构示意图。本实施例与第一种实施例、第二种实施例相同的部分在此不再赘述，具体可参照第一种、第二种实施例。本实施例与第一种、第二种实施例的不同之处在于：
每一所述分支电极112包括一个第一分支部1121和一个第二分支部1122。所述第一分支部1121还包括第一分支1123和连接部1124，所述第一分支1123通过所述连接部1124与所述主干道电极111连接，且与所述主干道电极111成预设角度，所述预设角度为30°至60°；所述第二分支部1122和第一分支部1121交叉设置，且与所述主干道电极111不接触。
在一种实施方案中，如图4所示，所述第二分支部1122位于所述触控子单元的对角线上，且关于所述触控单元的对角线自对称。进一步的，所述第二分支部1122还关于所述触控子单元的对角线自对称。其中，所述第一分支1123、所述第二分支部1122的形状可以是如图4所示的矩形，也可以是如图3所示的长条锯齿状，或其他形状，在此不做限定。
所述第二分支部1122的长为小于所述触控子单元对角线的长度，所述第二分支部1122的宽小于等于五个相邻子像素之间的最远距离。所述第二分支部1122的长是指所述第二分支部1122在所述第二分支部1122延伸方向上的长度，所述第二分支部1122的宽是指所述第二分支部1122在垂直于所述第二分支部1122延伸方向上的长度。
本实施例通过在所述主干道电极111的首部或尾部设置包括一个所述第一分支部1121和一个所述第二分支部1122的分支电极112，相比于第一种实施例，进一步增大了第一触控电极110和第二触控电极120之间的耦合面积，进一步提高了耦合效果，提高了所述第一触控电极110和所述第二触控电极120之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在第四种实施例中，如图5所示，图5示出了本申请实施例提供的触控单元的第四种结构示意图。本实施例与第三种实施例相同的部分在此不再赘述，具体可参照第三种实施例。本实施例与第三种实施例的不同之处在于：
每一所述分支电极112包括一个第一分支部1121和多个第二分支部1122，所述第二分支部1122相互平行。所述第二分支部1122的形状和大小可以均相同设置，也可以不同设置。所述第二分支部1122的长度分布可以在远离所述触控子单元对角线的方向上依次减小，所述第二分支部1122宽度分布也可以在远离所述触控子单元对角线的方向上依次减小。
本实施例通过在所述主干道电极111的两端设置包括所述一个所述第一分支部1121和多个所述第二分支部1122的分支电极112，相比于第三种实施例，更进一步增大了第一触控电极110和第二触控电极120之间的耦合面积，更进一步提高了耦合效果，提高了所述第一触控电极110和所述第二触控电极120之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在第五种实施例中，如图1所示，触控电极结构还包括第一悬浮电极130，所述第一悬浮电极130设置于相邻的两个所述第二触控电极120之间，且与所述第二触控电极120彼此绝缘，从而起到有效电性隔离相邻通道的所述第二触控电极120，防止相邻的第二触控电极通道短路的作用。所述第一悬浮电极130同时与第一触控电极110彼此绝缘。所述第一悬浮电极130的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。
所述第一触控电极110和所述第二触控电极120之间通过断口实现彼此绝缘，所述第一触控电极110和所述第二触控电极120之间的距离较近，从而确保了所述第一触控电极110和所述第二触控电极120较大的边场互容值，有利于提高手指触摸时，所述第一触控电极110和所述第二触控电极120之间边场电容的改变量，提高了触控互容信号量，提高了触摸灵敏度。
在第六种实施例中，如图6所示，图6示出了本申请实施例提供的触控单元的第五种结构示意图。本实施例与第五种实施例相同的部分在此不再赘述，本实施例与第五种实施例的不同之处在于：
触控电极结构还包括第二悬浮电极140，所述第二悬浮电极140设置于第一触控电极110和第二触控电极120之间，用于电性隔离所述第一触控电极110和所述第二触控电极120。所述第二悬浮电极140的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。所述第二悬浮电极140可以有效降低基础互电容值，从而提高手指触摸时所述基础互电容值的变化率。
在第七种实施例中，如图7所示，，图7示出了本申请实施例提供的触控单元的第六种结构示意图。本实施例与第三种实施例相同的部分在此不再赘述，本实施例与第三种实施例的不同之处在于：
所述分支电极112与所述主干道电极111的中间部连接。所述第一分支部1121设置于所述触控子单元的对角线上，所述第二分支部1122与所述第一分支部1121交叉连接。所述第一分支部1121彼此之间可以相互接触，也可以相互不接触。进一步的，所述第二分支部1122设置于所述触控单元的对角线上，且所述第二分支部1122彼此不接触。再进一步的，所述第二分支部1122关于所述触控单元的对角线自对称。再进一步的，所述第二分支部1122关于所述触控子单元的对角线自对称。
本实施例通过在所述主干道电极111的中间部设置包括一个所述第一分支部1121和一个所述第二分支部1122的分支电极112，增大了第一触控电极110和第二触控电极120之间的耦合面积，进一步提高了耦合效果，提高了所述第一触控电极110和所述第二触控电极120之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
本申请实施例提供的触控电极结构的各个实施例之间并不是相互孤立的，本领域的技术人员可以对不同的实施例，或结合其技术启示进行再次组合进而得到更好的效果。
在本申请实施例提供的触控电极结构中，所述第一触控电极110、所述第二触控电极120、所述第一悬浮电极130和所述第二悬浮电极140可以是透明导电薄膜，也可以是不透明的网格状金属，所述金属网格避开子像素的发光区域，即所述金属网格的网格线对应于子像素的间隔区，子像素对应于网格线围成的穿透区内。
同时，本申请还提供一种触控显示面板，请参照图8，图8示出了本申请实施例提供的触控显示面板的结构示意图。如图所示，所述触控显示面板包括：
显示层710；
薄膜封装层720，设置于所述显示层710上；
触控层730，设置于所述薄膜封装层720上；所述触控层730包括本申请实施例提供的触控电极结构，所述触控电极结构包括：多个平行设置的第一触控电极，所述第一触控电极包括沿第一方向首尾相连且连续导通的多个主干道电极，与所述主干道电极连接的分支电极，所述分支电极包括第一分支部和第二分支部，所述第一分支部与所述主干道电极连接，所述第二分支部与所述第一分支部交叉连接、且不与所述主干道电极接触；多个平行设置的第二触控电极，所述第二触控电极沿第二方向连续导通，所述第二触控电极围绕所述分支电极和所述主干道电极设置，且与所述第一触控电极电性绝缘；所述第二方向和所述第一方向相互垂直，所述第一触控电极和所述第二触控电极交叉形成若干重复排列的触控单元。
本实施例提供了一种触控显示面板，所述触控显示面板包括本申请实施例提供的触控电极结构，在所述触控电极结构中，所述第一触控电极包括主干道电极和分支电极，所述主干道电极的设置有利于电流在第一触控电极通道方向上的传导，大大降低了第一触控电极通道的阻抗，从而有效减小了所述第一触控电极的RC延时，降低了屏体扫描所需要的时间，进而有效提高触控的报点率；另外，所述分支电极的设置、以及所述第二触控电极围绕所述分支电极和所述主干道电极的设置，提高了所述第一触控电极和所述第二触控电极之间的耦合效果，有效提高了所述第一触控电极和所述第二触控电极之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
在一种实施例中，请参照图9，图9示出了本申请实施例提供的触控层的结构示意图。如图所示，所述触控层730包括：
缓冲层731；
第一金属层，设置于所述缓冲层731上，图案化形成桥接电极1134；
第一绝缘层732，覆盖所述桥接电极1134；
第二金属层，设置于所述第一绝缘层732上，图案化形成第一触控电极110和第二触控电极120，所述第一触控电极110通过过孔与所述桥接电极1134连接，从而实现所述第一触控电极110在所述第一方向上的连续导通；
第二绝缘层733，覆盖所述第一触控电极110和所述第二触控电极120。
在另一种实施方案中，所述第一触控电极110包括与其同层设置的通道电极，所述通道电极连接相邻的两个所述主干道电极，从而实现所述第一触控电极110在所述第一方向上的连续导通；同时，第二触控电极120通过异层设置的桥接电极实现在所述第二方向上的连续导通。
在又一种实施例中，所述第一触控电极110和所述第二触控电极120异层设置。
由于本实施例提供的所述触控显示面板包括本申请实施例提供的所述触控电极结构，因此具备本申请实施例提供的触控电极结构所具备的有益效果，具体的工作原理和实施方式请参照上述实施例，在此不再一一赘述。
根据上述实施例可知：
本申请实施例提供了一种触控电极结构及触控显示面板，所述触控电极结构包括：多个平行设置的第一触控电极，所述第一触控电极包括沿第一方向首尾相连且连续导通的多个主干道电极，与所述主干道电极连接的分支电极，所述分支电极包括第一分支部和第二分支部，所述第一分支部与所述主干道电极连接，所述第二分支部与所述第一分支部交叉连接、且不与所述主干道电极接触；多个平行设置的第二触控电极，所述第二触控电极沿第二方向连续导通，所述第二触控电极围绕所述分支电极和所述主干道电极设置，且与所述第一触控电极电性绝缘；所述第二方向和所述第一方向相互垂直，所述第一触控电极和所述第二触控电极交叉形成若干重复排列的触控单元。在所述触控电极结构中，所述第一触控电极包括主干道电极和分支电极，所述主干道电极的设置有利于电流在第一触控电极通道方向上的传导，大大降低了第一触控电极通道的阻抗，从而有效减小了所述第一触控电极的RC延时，降低了屏体扫描所需要的时间，进而有效提高触控的报点率；另外，所述分支电极的设置、以及所述第二触控电极围绕所述分支电极和所述主干道电极的设置，提高了所述第一触控电极和所述第二触控电极之间的耦合效果，有效提高了所述第一触控电极和所述第二触控电极之间的互容值，保证了较高的触控互容信号量，提高了触摸灵敏度。
综上所述，虽然本申请已以优选实施例揭露如上，但上述优选实施例并非用以限制本申请，本领域的普通技术人员，在不脱离本申请的精神和范围内，均可作各种更动与润饰，因此本申请的保护范围以权利要求界定的范围为准。

Claims (20)

  1. 一种触控电极结构，其包括：
    多个平行设置的第一触控电极，所述第一触控电极包括沿第一方向首尾相连且连续导通的多个主干道电极，与所述主干道电极连接的分支电极，所述分支电极包括第一分支部和第二分支部，所述第一分支部与所述主干道电极连接，所述第二分支部与所述第一分支部交叉连接、且不与所述主干道电极接触；
    多个平行设置的第二触控电极，所述第二触控电极沿第二方向连续导通，所述第二触控电极围绕所述分支电极和所述主干道电极设置，且与所述第一触控电极电性绝缘；
    所述第二方向和所述第一方向相互垂直，所述第一触控电极和所述第二触控电极交叉形成若干重复排列的触控单元。
  2. 如权利要求1所述的触控电极结构，其中，所述第一触控电极在所述第二方向上间隔排列，所述第一触控电极的数量为偶数。
  3. 如权利要求1所述的触控电极结构，其中，在所述触控单元内，所述第一触控电极的面积小于所述第二触控电极的面积。
  4. 如权利要求1所述的触控电极结构，其中，所述主干道电极包括沿所述第一方向的第一中心线，和沿所述第二方向的第二中心线，所述分支电极关于所述第一中心线对称，且关于所述第二中心线对称。
  5. 如权利要求1所述的触控电极结构，其中，所述分支电极与所述主干道电极的首部或尾部连接，且所述分支电极彼此不接触。
  6. 如权利要求5所述的触控电极结构，其中，所述第一分支部设置于所述触控单元的对角线上。
  7. 如权利要求6所述的触控电极结构，其中，所述第二分支部关于所述触控单元的对角线自对称。
  8. 如权利要求6所述的触控电极结构，其中，所述触控单元包括四个触控子单元，所述第二分支部设置于所述触控子单元的对角线上。
  9. 如权利要求1所述的触控电极结构，其中，所述分支电极与所述主干道电极的中间部连接。
  10. 如权利要求9所述的触控电极结构，其中，所述触控单元包括四个触控子单元，所述第一分支部设置于所述触控子单元的一条对角线上，所述第二分支部设置于所述触控子单元的另一条对角线上，所述第二分支部同时设置于所述触控单元的对角线上。
  11. 如权利要求1所述的触控电极结构，其中，所述第一分支部包括连接部和第一分支，所述连接部连接所述主干道电极和所述第一分支。
  12. 如权利要求11所述的触控电极结构，其中，所述主干道电极构成的几何形状为矩形，所述矩形的长边沿所述第一方向，所述连接部构成的几何形状为直角三角形，所述直角三角形的一条直角边与所述主干道电极的宽平齐，所述直角三角形的另一条直角边与所述主干道电极的长共边，所述直角三角形的斜边与所述第一分支共边。
  13. 如权利要求1所述的触控电极结构，其中，所述触控电极结构还包括第一悬浮电极，所述第一悬浮电极设置于相邻的两个所述第二触控电极之间，用于电性隔离相邻的两个所述第二触控电极，所述第一悬浮电极与所述第二触控电极、所述第一触控电极电性绝缘。
  14. 如权利要求1所述的触控电极结构，其中，所述触控电极结构还包括第二悬浮电极，所述第二悬浮电极设置于所述第一触控电极和所述第二触控电极之间，用于电性隔离所述第一触控电极和所述第二触控电极。
  15. 如权利要求1所述的触控电极结构，其中，所述第一分支部、所述第二分支部的长均小于所述触控单元对角线的一半，所述第一分支部的长是指所述第一分支部在所述第一分支部延伸方向上的长度，所述第二分支部的长是指所述第二分支部在所述第二分支部延伸方向上的长度。
  16. 如权利要求15所述的触控电极结构，其中，所述第一分支部的宽小于等于所述主干道电极的宽，所述第二分支部的宽小于等于所述第一分支部的宽，所述主干道电极的宽是指所述主干道电极在所述第二方向上的长度，所述第一分支部的宽是指所述第一分支部在垂直于所述第一分支部延伸方向上的长度，所述第二分支部的宽是指所述第二分支部在垂直于所述第二分支部延伸方向上的长度。
  17. 如权利要求16所述的触控电极结构，其中，所述主干道电极的宽大于等于五个相邻子像素之间的最远距离、且小于等于二十个相邻子像素之间的最远距离，所述第一分支部的宽大于等于两个相邻子像素之间的最远距离、且小于等于五个相邻子像素之间的最远距离，所述第二分支部的宽小于等于五个相邻子像素之间的最远距离。
  18. 如权利要求13所述的触控电极结构，其中，所述第一悬浮电极的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。
  19. 如权利要求14所述的触控电极结构，其中，所述第二悬浮电极的宽大于一个子像素的宽度、且小于等于两个相邻子像素之间的最远距离。
  20. 一种触控显示面板，其包括：
    显示层；
    薄膜封装层，设置于所述显示层上；
    触控层，设置于所述薄膜封装层上，所述触控层包括如权利要求1至19任一所述的触控电极结构。
PCT/CN2020/103297 2020-06-22 2020-07-21 触控电极结构及触控显示面板 WO2021258469A1 (zh)

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