WO2022017499A1 - 一种显示面板和显示装置 - Google Patents

一种显示面板和显示装置 Download PDF

Info

Publication number
WO2022017499A1
WO2022017499A1 PCT/CN2021/108135 CN2021108135W WO2022017499A1 WO 2022017499 A1 WO2022017499 A1 WO 2022017499A1 CN 2021108135 W CN2021108135 W CN 2021108135W WO 2022017499 A1 WO2022017499 A1 WO 2022017499A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
additional
layer
display substrate
display panel
Prior art date
Application number
PCT/CN2021/108135
Other languages
English (en)
French (fr)
Inventor
项大林
李园园
薄赜文
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/770,029 priority Critical patent/US20220391042A1/en
Publication of WO2022017499A1 publication Critical patent/WO2022017499A1/zh

Links

Images

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
    • G06F3/044—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
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0448—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
    • G06F2203/04111—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
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present disclosure belongs to the field of display technology, and in particular relates to a display panel and a display device.
  • the touch display of the OLED display panel can be realized.
  • the present disclosure provides a display panel, comprising a display substrate and a touch electrode layer disposed on a light-emitting side of the display substrate, the touch electrode layer comprising at least one first electrode and at least one first electrode Two electrodes, the at least one first electrode and the at least one second electrode intersect and are insulated from each other; wherein, the display panel further includes: an additional electrode layer, the additional electrode layer is a different layer from the touch electrode layer , the additional electrode layer includes at least one first additional electrode, the orthographic projection of the at least one first additional electrode on the display substrate at least partially overlaps the orthographic projection of the first electrode on the display substrate; and an insulating layer between the additional electrode layer and the touch electrode layer, wherein the at least one first additional electrode is connected to the at least one first additional electrode through at least one first via opened in the insulating layer first electrode.
  • the additional electrode layer further includes at least one second additional electrode, the at least one second additional electrode and the at least one first additional electrode being insulated from each other; and the at least one The orthographic projection of the second additional electrode on the display substrate at least partially overlaps with the orthographic projection of the second electrode on the display substrate, and is connected through at least one second via hole opened in the insulating layer. at least one second electrode.
  • the orthographic projection of the at least one first electrode on the display substrate includes a first edge region, and the orthographic projection of the at least one first additional electrode on the display substrate is the same as the orthographic projection of the at least one first additional electrode on the display substrate.
  • the first edge region overlaps; and the orthographic projection of the at least one second electrode on the display substrate includes a second edge region, and the orthographic projection of the at least one second additional electrode on the display substrate is the same as the orthographic projection of the at least one second electrode on the display substrate The second edge region overlaps.
  • the additional electrode layer further includes at least one bridge portion; the at least one bridge portion connects the at least one first additional electrode, and the first electrode includes a portion located on the at least one second Two first electrode blocks on both sides of one second electrode among the electrodes, the at least one bridge portion connects the two first electrodes respectively through at least two third via holes opened in the insulating layer.
  • the blocks are electrically connected together; alternatively, the at least one bridge portion connects the at least one second additional electrode, the second electrode comprising two second electrodes located on either side of one of the at least one first electrodes Two electrode blocks, the at least one bridge portion electrically connects the two second electrode blocks together through at least two third via holes opened in the insulating layer respectively.
  • the at least one first via hole includes a plurality of first via holes, and orthographic projections of the plurality of first via holes on the display substrate are uniformly distributed in the at least one The orthographic projection of one first additional electrode on the display substrate coincides with the orthographic projection of the at least one first electrode on the display substrate.
  • the at least one second via hole includes a plurality of second via holes, and orthographic projections of the plurality of second via holes on the display substrate are uniformly distributed in the at least one second via hole.
  • the orthographic projection of one second additional electrode on the display substrate coincides with the orthographic projection of the at least one second electrode on the display substrate.
  • the at least one first additional electrode includes a plurality of first additional electrodes, and orthographic projections of the plurality of first additional electrodes on the display substrate are distributed over the at least one first additional electrode A portion of orthographic projection of an electrode on the display substrate or the entire first edge region.
  • the at least one second additional electrode includes a plurality of second additional electrodes, and orthographic projections of the plurality of second additional electrodes on the display substrate are distributed over the at least one first additional electrode The part or the entire second edge area of the orthographic projection of the two electrodes on the display substrate.
  • the orthographic projection of the at least one first additional electrode on the display substrate overlaps the orthographic projection of the at least one first electrode on the display substrate.
  • the orthographic projection of the at least one second additional electrode on the display substrate overlaps the orthographic projection of the at least one second electrode on the display substrate.
  • the touch electrode layer includes a plurality of subunits, and the subunits are arranged in an array along the first direction and the second direction; each of the subunits includes at least one of the first electrodes and at least one of the second electrodes, the first electrode and the second electrode structure respectively include a plurality of first interdigitated electrodes and a plurality of second interdigitated electrodes extending along the first direction Finger electrodes, the first interdigitated electrodes and the second interdigitated electrodes are alternately arranged in the second direction.
  • the additional electrode layer is provided with a corresponding one bridge portion.
  • the first electrode and the second electrode are mesh-shaped; the additional electrode layer is mesh-shaped.
  • the first electrode and the second electrode include a titanium/aluminum/titanium laminate material.
  • the additional electrode layer includes a titanium/aluminum/titanium laminate material.
  • the insulating layer includes a silicon nitride or silicon oxide material.
  • the mesh at the boundary of the first electrode and the second electrode includes a plurality of metal wires, at least two of the plurality of metal wires having fractures so that all The first electrode and the second electrode are electrically insulated.
  • the display panel further includes a first floating electrode, the first floating electrode and the touch electrode layer are disposed in the same layer, spaced apart and insulated from each other; The floating electrode floats.
  • the display panel further includes a second floating electrode, the second floating electrode and the additional electrode layer are disposed in the same layer, and the second floating electrode and the additional electrode layer
  • the electrode layers are insulated from each other; the orthographic projection of the second floating electrode and the additional electrode layer on the display substrate and the positive projection of the first floating electrode and the touch electrode layer on the display substrate Projections overlap.
  • a display device including the display panel according to any embodiment of the first aspect of the present disclosure.
  • FIG. 1 is a schematic top view of the structure of an additional electrode layer in a display panel according to an embodiment of the disclosure
  • FIG. 2 is a schematic top view of the structure of a touch electrode layer in a display panel according to an embodiment of the disclosure
  • FIG. 3 is a schematic cross-sectional view of the structure of a display panel according to an embodiment of the disclosure.
  • FIG. 4 is a schematic top view of the structure of a position of a bridge in a display panel according to an embodiment of the disclosure
  • FIG. 5 is a schematic top view of the structure of an additional electrode layer in another display panel according to an embodiment of the present disclosure
  • FIG. 6 is a schematic top view of the structure of a touch electrode layer in another display panel according to an embodiment of the disclosure.
  • FIGS. 7a to 7c are schematic diagrams of a manufacturing process of a display panel according to an embodiment of the disclosure.
  • FIG. 8 is a schematic top view of the structure of a touch electrode layer in a display panel according to another embodiment of the disclosure.
  • FIG. 9 is a schematic top view of the structure of an additional electrode layer in a display panel according to another embodiment of the disclosure.
  • FIG. 10 is a schematic cross-sectional view of the structure of a display panel according to another embodiment of the disclosure.
  • FIG. 11 is a schematic top view of an electrode of an additional electrode layer in a display panel according to another embodiment of the disclosure.
  • the capacitance change between the mutual capacitive touch driving electrodes and the sensing electrodes is an important indicator that affects the touch performance.
  • the film structure above the touch electrodes in the OLED display panel becomes thicker, or a large capacitance is formed between the touch electrodes and the metal film layer (such as the cathode) below the touch electrodes, the load of the touch electrodes is large, and the load on the touch electrodes is large.
  • the mutual capacitance change of the touch electrodes during mutual capacitance touch is very small (for example, the mutual capacitance change between the active pen and the touch screen is only a few fF).
  • the present disclosure provides a display panel and a display device. device.
  • the display panel provided by the present disclosure, by arranging the additional electrode layer, the amount of change in mutual capacitance when the display panel is touched is increased, and the touch sensitivity and accuracy thereof are improved.
  • FIG. 1 is a schematic top view of the structure of an additional electrode layer in a display panel according to an embodiment of the disclosure
  • FIG. 2 is a schematic top view of the structure of a touch electrode layer in a display panel according to an embodiment of the disclosure
  • FIG. 3 is an embodiment of the disclosure
  • the display panel according to the embodiment of the present disclosure includes: a display substrate 1 and a touch electrode layer 2 disposed on the light-emitting side of the display substrate 1 , and the touch electrode layer 2 includes at least one first electrode 21 and at least one touch electrode layer 2 .
  • the display panel also includes an additional electrode layer 3, the additional electrode layer 3 and the touch electrode layer 2 are arranged in different layers, and the additional electrode layer 3 includes at least one first additional electrode 31, the orthographic projection of the at least one first additional electrode 31 on the display substrate 1 and the orthographic projection of the first electrode 21 on the display substrate 1 at least partially overlap; the additional electrode layer 3 and the touch electrodes
  • An insulating layer 4 is provided between the layers 2 ; the at least one first additional electrode 31 is connected to the first electrode 21 through at least one first via hole 41 opened in the insulating layer 4 .
  • the first additional electrode 31 is connected in parallel with the first electrode 21 through the first via hole 41 opened in the insulating layer 4 .
  • the first via hole is opened in the insulating layer 4 , and the reference numeral 41 shown in FIG. 2 only represents the positional relationship between the first via hole and the touch electrode layer 2 .
  • an orthographic projection of the at least one first electrode 21 on the display substrate 1 includes a first edge region, and an orthographic projection of the at least one first additional electrode 31 on the display substrate 1 The orthographic projection overlaps the first edge region.
  • the additional electrode layer 3 further includes at least one second additional electrode 32, and the at least one second additional electrode 32 and the at least one first additional electrode 31 are insulated from each other; the at least one second additional electrode 32 passes through At least one second via hole 42 opened in the insulating layer 4 is connected to the at least one second electrode 22 .
  • the orthographic projection of the at least one second additional electrode 32 on the display substrate 1 at least partially overlaps with the orthographic projection of the second electrode 22 on the display substrate 1 , and is formed in the insulating layer 4 by opening.
  • the at least one second via hole 32 is connected to the at least one second electrode 22 .
  • the orthographic projection of the at least one second electrode 22 on the display substrate 1 includes a second edge region, and the at least one second additional electrode 32 on the display substrate 1 The orthographic projection overlaps the second edge region.
  • An edge region 211 is shown in FIG. 1 and includes the first edge region and the second edge region.
  • the edge region 211 extends along the first direction (Y direction) or the second direction (X direction).
  • the edge region 211 shown in FIG. 2 corresponds to the edge of the first electrode 21 and the edge of the second electrode 22 . 1 and 2 only show the edge region 211 extending in the Y direction, and the edge region extending in the X direction is not shown.
  • the first direction Y and the second direction X are two directions perpendicular to each other in the plane where the display panel is located.
  • the first electrode 21 is a driving electrode
  • the second electrode 22 is a sensing electrode
  • the first electrode 21 is a sensing electrode
  • the second electrode 22 is a driving electrode.
  • the first electrode 21 and the second electrode 22 are crossed and insulated from each other, so that mutual capacitive touch can be realized.
  • the lines of electric force between the first electrode 21 and the second electrode 22 are relatively dense, so that under the touch condition, the capacitance change between the first electrode 21 and the second electrode 22 is relatively large. Therefore, increasing the power lines at the edge region 211 can improve the touch sensitivity of the display panel.
  • An additional electrode layer 3 of a different layer from the touch electrode layer 2 is provided, and the orthographic projection of at least one first additional electrode 31 on the display substrate 1 at least partially overlaps with the orthographic projection of the first electrode 21 on the display substrate 1, and the additional The first additional electrode 31 in the electrode layer 3 is connected to the first electrode 21 .
  • the number of lines of electric force of the first electrode 21 and the second electrode 22 at the edge region 211 is increased, so that the electric field of the first electrode 21 and the second electrode 22 at the edge region 211 is enhanced, so that the first electrode 21 can be touched during touch.
  • the amount of change in mutual capacitance between 21 and the second electrode 22 increases.
  • the touch sensitivity of the display panel is improved, and the change of the mutual capacitance caused by the thick film structure above the touch electrode layer 2 or the large load of the touch electrode layer 2 is small and difficult to detect. touch problem.
  • the overall resistance of the display panel is reduced, and further along the extending direction of the first electrode 21, the channel resistance of the first electrode 21 and the second electrode 22 is reduced , reduces the difference of the resistance-capacitance product between one end of the first electrode 21 and the other end, and improves the uniformity of the power-on signal of the first electrode 21, thereby improving the linearity, accuracy, reporting rate, and floating of the touch electrode. (Floating) performance and other touch performance.
  • the number of the first via holes 41 is multiple.
  • the orthographic projection of the first via hole 41 on the display substrate 1 is evenly distributed in the overlapping area of the orthographic projection of the at least one first additional electrode 31 on the display substrate 1 and the orthographic projection of the at least one first electrode 21 on the display substrate 1 .
  • the arrangement of the plurality of first vias 41 on the one hand, can ensure the firmness of the electrical connection between the first additional electrode 31 and the first electrode 21; on the other hand, the first additional electrode 31 and the first electrode 21 are connected in parallel , thereby reducing the overall resistance of the display panel, which is beneficial to improve the touch performance of the touch electrodes.
  • a larger process margin can be reserved in the process fabrication of the first via hole 41 , thereby reducing the process difficulty and improving the yield.
  • the first electrodes 21 and the first additional electrodes 31 are disposed corresponding to the plurality of first via holes 41 .
  • the number of lines of electric force between the first electrode 21 and the second electrode 22 at the edge region 211 can be further increased, thereby further enhancing the connection between the first electrode 21 and the second electrode 22.
  • the electric field of the second electrode 22 in the edge region 211 further increases the variation of the mutual capacitance between the first electrode 21 and the second electrode 22 during touch control. Further, the touch sensitivity of the display panel is improved, and the change of mutual capacitance caused by the thick film structure above the touch electrode layer 2 or the large load of the touch electrode layer 2 is small and difficult to detect. touch problem.
  • the second additional electrode 32 in parallel with the second electrode 22 , the overall resistance of the display panel is reduced, and the channel resistance of the first electrode 21 and the second electrode 22 is further reduced along the extending direction of the second electrode 22 . , reduces the difference of the resistance-capacitance product between one end of the second electrode 22 and the other end, improves the uniformity of the power-on signal of the second electrode 22, and further improves the linearity, accuracy, reporting rate, floating touch performance such as ground performance.
  • the display panel includes at least one first additional electrode 31 and at least one second additional electrode 32 , and includes at least one first electrode 21 and at least one second electrode 22 .
  • the present disclosure is not limited thereto.
  • the display panel includes a plurality of first additional electrodes 31 and a plurality of second additional electrodes 32, and includes a plurality of first electrodes 21 and a plurality of second electrodes 22, as shown in FIGS. 1 and 2 shown in.
  • the second additional electrode 32 is connected in parallel with the second electrode 22 through the second via hole 42 opened in the insulating layer 4 .
  • the second via hole 42 is opened in the insulating layer 4 , and 42 shown in FIG. 2 only represents the positional relationship between the second via hole and the touch electrode layer 2 .
  • the number of the second vias 42 is multiple, and the orthographic projections of the second vias 42 on the display substrate 1 are evenly distributed between the orthographic projections of the second additional electrodes 32 on the display substrate 1 and the second electrodes 22 .
  • the overlapping area of the orthographic projections on the display substrate 1 can ensure the firmness of the electrical connection between the second additional electrodes 32 and the second electrodes 22; on the other hand, the second additional electrodes 32 and the second electrodes 22 are connected in parallel , thereby reducing the overall resistance of the display panel, which is beneficial to improve the touch performance of the touch electrodes.
  • a larger process margin can be reserved in the process fabrication of the second via hole 42 , thereby reducing the difficulty of the process and improving the yield.
  • the second electrodes 22 and the second additional electrodes 32 are disposed corresponding to the plurality of second via holes 42 .
  • the additional electrode layer 3 is disposed on the display substrate 1 .
  • the additional electrode layer 3 may also be disposed on the side of the touch electrode layer 2 away from the display substrate 1 .
  • the additional electrode layer 3 may be provided with only the first additional electrode 31 or only the second additional electrode 32 .
  • the additional electrode layer 3 may also be provided with both the first additional electrode 31 and the second additional electrode 32 , as shown in FIG. 1 .
  • the display substrate 1 includes a backplane provided with a driving circuit, a sub-pixel array provided on the backplane, and an encapsulation layer for encapsulating the sub-pixels; and also includes a buffer layer disposed on the encapsulation layer, the buffer layer It is beneficial to form the touch electrode layer 2 thereon.
  • the sub-pixels may be OLED light-emitting elements, and may also be LED or Micro LED light-emitting elements.
  • the display panel further includes a planarization layer 5 , a first transparent adhesive layer 6 , a polarizer 7 , a second transparent adhesive layer 8 and a cover plate 9 , which are sequentially arranged on the side of the touch electrode layer 2 away from the display substrate 1 .
  • the first transparent adhesive layer 6 is used for bonding the planarization layer 5 and the polarizer 7 together; the second transparent adhesive layer 8 is used for bonding the polarizer 7 and the cover plate 9 together.
  • the polarizer 7 can play a role in reducing the reflectivity of the display panel to light.
  • the thickness of the planarization layer 5 ranges from 0.1 to 20 ⁇ m.
  • the first electrode 21 and the second electrode 22 are provided in the same layer.
  • the additional electrode layer 3 further includes at least one bridge portion 23, and the orthographic projection of the at least one bridge portion 23 on the display substrate 1 is located at the intersection of the first electrode 21 and the second electrode 22 at the display substrate. 1 in the orthographic projection.
  • At least one bridge 23 connects at least one first additional electrode 31 .
  • the first electrode 21 includes two first electrode blocks 210 located on both sides of one of the second electrodes 22 .
  • At least one bridge portion 23 electrically connects the two first electrode blocks 210 together through at least two third via holes 43 opened in the insulating layer 4 .
  • At least one bridge connects at least one second additional electrode.
  • the second electrode includes two second electrode blocks flanking one of the at least one first electrode.
  • At least one bridge portion electrically connects the two second electrode blocks together through at least two third via holes opened in the insulating layer (not shown in the figure).
  • the first electrode 21 and the second electrode 22 are provided in the same layer.
  • the additional electrode layer 3 further includes at least one bridge portion 23 , and the orthographic projection of the at least one bridge portion 23 on the display substrate 1 is located at the intersection of the first electrode 21 and the second electrode 22 on the display substrate 1 .
  • At least one bridge portion 23 is electrically connected to at least one first additional electrode 31 .
  • the first electrode 21 includes two first electrode blocks 210 extending along the X direction and located on both sides of one of the at least one second electrodes 22 .
  • At least one bridge portion 23 electrically connects the two first electrode blocks 210 together through at least two third via holes 43 opened in the insulating layer 4.
  • the at least one bridge portion is electrically connected to at least one second additional electrode, the second electrode including two second electrode blocks extending in the Y-direction on either side of one of the at least one first electrodes.
  • At least one bridge portion electrically connects the two second electrode blocks together through at least two third via holes opened in the insulating layer (not shown in the figure).
  • the first electrode 21 is disconnected at the middle, and thus, the first electrode 21 is divided into two parts (ie, the first electrode block 210 ), while the second electrode 22 is not disconnected.
  • the first electrode 21 in each subunit 200 may be undisconnected at the middle, while the second electrode 22 is disconnected, so that the first electrode 21 is disconnected in the middle.
  • the second electrode 22 includes two parts (ie, the second electrode block 220).
  • the bridge portion 23 is disposed at a position corresponding to the disconnected position of the first electrode 21 or the second electrode 22 in the touch electrode layer 2 so that the orthographic projection of the bridge portion 23 on the display substrate 1 at the disconnected position of the first electrode 21 or the second electrode 22 .
  • the bridge portion 23 connects the first additional electrode 31 and connects two adjacent second electrodes through the third via 43 opened in the insulating layer 4 .
  • the blocks 220 are electrically connected together.
  • the bridge portion 23 connects the second additional electrode 32 and electrically connects the adjacent two first electrode blocks through the third via hole opened in the insulating layer. connected.
  • the display panel includes a plurality of first additional electrodes 31 and a plurality of second additional electrodes 32 disposed in the additional electrode layer 3 , wherein each first additional electrode
  • the electrodes 31 and each of the second additional electrodes 32 extend in the Y direction and are arranged in the X direction; the plurality of first additional electrodes 31 are arranged in pairs, and the plurality of second additional electrodes 32 are arranged in pairs;
  • the electrodes 31 are arranged along the X direction; a second additional electrode 32 is provided on opposite sides of the two first additional electrodes 31 in each pair of the first additional electrodes 31 ; wherein, each second additional electrode 32 is at its length
  • the display panel includes a plurality of first electrodes 21 and a plurality of second electrodes 22 disposed in the touch electrode layer 2 , each first electrode 21 and each of the second electrodes 22 correspond to a pair of first additional electrodes 31 and a pair of second additional electrodes 32, respectively.
  • each first electrode 21 and each of the second electrodes 22 correspond to a pair of first additional electrodes 31 and a pair of second additional electrodes 32, respectively.
  • the orthographic projection of a pair of first additional electrodes 31 on the display substrate 1 is located in the width direction (X direction) of the orthographic projection of one first electrode 21 on the display substrate 1 two sides of the display substrate 1 ; the orthographic projection of a pair of second additional electrodes 32 on the display substrate 1 is located on both sides in the width direction (X direction) of the orthographic projection of a second electrode 22 on the display substrate 1 .
  • the touch electrode layer 2 further includes first floating electrodes 10 extending along the Y direction, which are respectively located at the outermost sides of the touch electrode layer 2 .
  • first electrodes 21 there are eight first electrodes 21 extending in the Y direction and seven second electrodes 22 extending in the Y direction, wherein each of the two outermost first electrodes 21 is close to the corresponding One side of the second electrode 22 is connected to the outermost two first additional electrodes 31 in the additional electrode layer 3 , and each of the outermost two first electrodes 21 is close to the corresponding first floating electrode 10 . One side is not connected to the first additional electrode 31 .
  • the touch electrode layer 2 further includes a first electrode 21 extending in the X direction and intersecting with the plurality of first electrodes 21 extending in the Y direction.
  • the first electrode 21 extending in the X direction Each of the plurality of second electrodes 22 extending in the Y direction is disconnected at a position corresponding to the bridge portion 23 and divided into upper and lower parts to correspond to the disconnected second additional electrodes 32, respectively.
  • the first electrode 21 extending in the X direction is disconnected at a position corresponding to the bridge portion 23 (ie, includes the first electrode block 210 ), and extends in the Y direction through the position corresponding to the bridge portion 23 .
  • the second electrode 22 is not disconnected.
  • the present disclosure is not limited thereto.
  • the first electrode 21 extending in the X direction is not disconnected at the position corresponding to the bridge portion 23
  • the second electrode 22 extending in the Y direction passing through the position corresponding to the bridge portion 23 is disconnected On (ie, including the second electrode block 220 ), as shown in FIG. 6 , in each subunit 200 , the corresponding first electrodes 21 and second electrodes 22 are arranged in this manner.
  • the length direction of the bridge portion 23 coincides with the X direction, and the width direction coincides with the Y direction;
  • the third via holes 43 are respectively electrically connected to the two adjacent first electrode blocks 210 in the X direction (that is, the bridge portion 23 will extend in the X direction through the plurality of third via holes 43 opened in the insulating layer 4 .
  • the first electrodes 21 disconnected at positions corresponding to the bridges 23 are electrically connected together).
  • the present disclosure is not limited thereto.
  • the width direction of the bridge portion 23 is coincident with the X direction, and the length direction is coincident with the Y direction;
  • the two adjacent second electrode blocks 220 are electrically connected (that is, the bridge portion 23 is disconnected at a position corresponding to the bridge portion 23 extending in the Y direction through a plurality of third via holes 43 opened in the insulating layer 4 .
  • the second electrodes 22 are electrically connected together), as shown in FIG. 5 and FIG. 6 , in each subunit 200 , the corresponding bridge portion 23 and the disconnected second electrodes 22 are arranged in this manner.
  • the first direction Y and the second direction X cross each other, and the first direction Y and the second direction X may be perpendicular to each other, or may not be perpendicular to each other.
  • the first electrode 21 , the second electrode 22 and the additional electrode layer 3 can also be arranged on three different layers respectively. Compared with this case, the first electrode 21 and the second electrode 22 are arranged on the same layer. , and when the bridge portion 23 connecting the first electrode 21 or the second electrode 22 and the first additional electrode 31 and the second additional electrode 32 of the additional electrode layer 3 are arranged on another layer, the thickness of the display panel can be reduced. It is thin, and is beneficial to the improvement of the touch precision and the touch sensitivity of the touch electrode.
  • the orthographic projection of the first additional electrode 31 on the display substrate 1 is distributed over a portion or the entire first edge region of the orthographic projection of the first electrode 21 on the display substrate 1 . That is, the first additional electrodes 31 may be distributed locally on the edge of the first electrode 21 , or may cover the entire edge of the first electrode 21 .
  • the first electrode 21 and the second electrode 22 can be better placed in the edge region
  • the electric field of 211 is enhanced, thereby further increasing the mutual capacitance change between the first electrode 21 and the second electrode 22 during touch, improving the touch sensitivity of the display panel, improving or avoiding the film layer above the touch electrode layer 2
  • the thickness of the structure or the large load of the touch electrode layer 2 results in a small change in mutual capacitance, and it is difficult to detect whether the touch is touched, which improves the touch quality.
  • the orthographic projection of the second additional electrode 32 on the display substrate 1 is distributed over a portion or the entire second edge region of the orthographic projection of the second electrode 22 on the display substrate 1 . That is, the second additional electrodes 32 may be distributed locally on the edge of the second electrode 22 , or may cover the entire edge of the second electrode 22 .
  • the first electrode 21 and the second electrode 22 can be better located in the edge region
  • the electric field of 211 is enhanced, thereby further increasing the mutual capacitance change between the first electrode 21 and the second electrode 22 during touch, improving the touch sensitivity of the display panel, improving or avoiding the film layer above the touch electrode layer 2
  • the thickness of the structure or the large load of the touch electrode layer 2 results in a small change in mutual capacitance, and it is difficult to detect whether the touch is touched, which improves the touch quality.
  • the first additional electrode 31 may not necessarily be a linear electrode extending in only one direction (the Y direction in FIG. 2 ), and it may have the same outline as the first electrode 21 , that is, the first additional electrode 31
  • the orthographic projection on the display substrate 1 is a rectangle and the orthographic projection of the first additional electrode 31 on the display substrate 1 overlaps with the orthographic projection of the first electrode 21 on the display substrate 1 .
  • This arrangement can better enhance the electric field of the first electrode 21 and the second electrode 22 in the edge region 211 , thereby further increasing the change in the mutual capacitance between the first electrode 21 and the second electrode 22 during touch control, improving the The touch sensitivity of the display panel improves or avoids the problem of small change in mutual capacitance caused by thick film structure above the touch electrode layer 2 or a large load on the touch electrode layer 2 , making it difficult to detect whether the touch is touched.
  • the second additional electrode 32 may not necessarily be a linear electrode extending in only one direction (the Y direction in FIG. 2 ), and it may have the same contour as the second electrode 22 , that is, the second additional electrode 32
  • the orthographic projection on the display substrate 1 is rectangular and the orthographic projection of the second additional electrode 32 on the display substrate 1 overlaps with the orthographic projection of the second electrode 22 on the display substrate 1 .
  • This arrangement can better enhance the electric field of the first electrode 21 and the second electrode 22 in the edge region 211 , thereby further increasing the change in the mutual capacitance between the first electrode 21 and the second electrode 22 during touch control, improving the The touch sensitivity of the display panel improves or avoids the problem of small change in mutual capacitance caused by thick film structure above the touch electrode layer 2 or a large load on the touch electrode layer 2 , making it difficult to detect whether the touch is touched.
  • the touch electrode layer 2 includes a plurality of subunits 200 , and the subunits 200 are arranged in an array (two rows and three columns as shown in FIG. 6 ); each of the subunits 200 includes At least one of the first electrodes 21 and at least one of the second electrodes 22, the first electrodes 21 and the second electrodes 22 respectively include a plurality of first interdigitated electrodes extending along the first direction Y and a plurality of second interdigitated electrodes, the first interdigitated electrodes and the second interdigitated electrodes are alternately arranged in the second direction X.
  • the first direction Y is the column direction of the array; the second direction X is the row direction of the array.
  • each subunit 200 may include at least one first electrode 21 and at least one second electrode 22 .
  • each subunit 200 may include a plurality of first electrodes 21 and a plurality of second electrodes 22 , as shown in FIG. 6 .
  • the additional electrode layer 3 including the plurality of bridges 23 and the first additional electrodes 31 and the second additional electrodes 32 is shown.
  • the arrangement of each bridge portion 23 and the corresponding first additional electrode 31 and the second additional electrode 32 corresponds to one subunit 200 .
  • the numbers of the first additional electrodes 31 , the second additional electrodes 32 , the first electrodes 21 and the second electrodes 22 there is no special requirement on the numbers of the first additional electrodes 31 , the second additional electrodes 32 , the first electrodes 21 and the second electrodes 22 .
  • the numbers of the first additional electrodes 31 and the second additional electrodes 32 shown in FIG. 5 are different from the numbers of the first additional electrodes 31 and the second additional electrodes 32 shown in FIG. 1 .
  • the number of the first electrodes 21 and the second electrodes 22 of each subunit 200 shown in FIG. 6 is different from that of the first electrodes 21 and the second electrodes 22 shown in FIG. 2 .
  • the first electrode 21 includes a plurality of first electrode blocks 210 , and two adjacent first electrode blocks 210 are electrically connected by connecting electrodes 221 , and the connecting electrodes 221 and the first electrode blocks 210 are in the same layer. set up.
  • the pattern and arrangement of the touch electrode layer 2 are not limited to those shown in FIG. 2 and FIG. 6 , and the pattern and arrangement of any other touch electrode layer 2 capable of realizing mutual capacitive touch applicable to this embodiment.
  • the bridge portion 23 includes one or more bridge portions, and the orthographic projection of the bridge portion 23 on the display substrate 1 is located at the disconnected position of the first electrode 21 or the second electrode 22;
  • the second direction X is the row direction of the array.
  • the number of the bridges 23 is specifically determined according to the pattern and arrangement of the first electrodes 21 or the second electrodes 22 .
  • the width of the first additional electrode 31 along the first direction Y or the second direction X ranges from 3 to 500 ⁇ m; the width of the second additional electrode 32 along the first direction Y or the second direction X ranges from 3 to 500 ⁇ m.
  • the setting of the width range of the first additional electrode 31 and the second additional electrode 32 can better enhance the electric field of the first electrode 21 and the second electrode 22 in the edge region 211, thereby further enhancing the touch control between the first electrode 21 and the second electrode 22.
  • the amount of change in mutual capacitance between the second electrodes 22 is increased, the touch sensitivity of the display panel is improved, and the mutual capacitance caused by the thick film structure above the touch electrode layer 2 or the heavy load of the touch electrode layer 2 is improved or avoided.
  • the capacitance change is small, and it is difficult to detect whether the touch is touched.
  • the first electrode 21 and the second electrode 22 are grid-shaped.
  • the additional electrode layer 3 has a mesh shape.
  • the mesh located at the boundary between the first electrode 21 and the second electrode 22 includes a plurality of metal wires, and at least two of the plurality of metal wires have fractures 300 so that the first electrode 21 and the second electrode 22 are electrically insulated.
  • the first electrode 21 and the second electrode 22 include a stacked material of titanium/aluminum/titanium; the grid line width of the first electrode 21 and the second electrode 22 ranges from 3 to 20 ⁇ m, and the first electrode 21 and the second electrode 22 The thickness of the second electrode 22 ranges from 0.1 to 10 ⁇ m.
  • the additional electrode layer 3 includes a stacked material of titanium/aluminum/titanium, the grid line width of the additional electrode layer 3 ranges from 3 to 20 ⁇ m, and the thickness of the additional electrode layer 3 ranges from 0.1 to 10 ⁇ m.
  • the insulating layer 4 includes silicon nitride or silicon oxide material, and the thickness of the insulating layer 4 ranges from 0.1 to 10 ⁇ m.
  • the thickness setting of the above film layers is beneficial to reduce the thickness of the display panel and improve the touch performance of the display panel.
  • the display panel further includes, as shown in FIG. 6 , a first floating electrode 10 , the first floating electrode 10 and the touch electrode layer 2 are disposed in the same layer, and the first floating electrode 10 and the touch electrode layer 2 are spaced apart and insulated from each other; the first floating electrode 10 is independently arranged and floated. That is, the first floating electrode 10 is not electrically connected to any electrode in the display panel, and is not connected to any electrical signal.
  • the first floating electrodes 10 are grid-shaped.
  • the first floating electrode 10 is an independently disposed electrode that is not connected to any metal conductive film layer.
  • the capacitance between the touch electrode layer 2 and other conductive film layers (such as the cathode film layer, etc.) under the touch electrode layer 2 can be reduced, thereby reducing the load of the touch electrode layer 2 and improving the Or to avoid the problem that the change in mutual capacitance is small due to the large load of the touch electrode layer 2 , and it is difficult to detect whether the touch is touched.
  • the finite element simulation is performed on the conventional display panel and the display panel in this embodiment.
  • the laminated structure of the display panel in this embodiment is shown in Table 1.
  • the conventional display panel only disconnects the touch electrode layer 2 through the bridge portion.
  • the first electrodes or the second electrodes in the touch control electrode layer 2 are connected together (that is, the bridge portion connects the two first electrode blocks or the two second electrode blocks in the touch electrode layer 2 together), but not included in the embodiment of the present disclosure.
  • the first additional electrode and the second additional electrode, and the arrangement of other film layers is the same as the laminated structure of the display panel in this embodiment.
  • the simulation results are shown in Table 2.
  • the display panel in this embodiment has an increase of 40fF, an increase of 38.6%, and a strong anti-environmental interference capability.
  • the resistance of the first electrode 21 is increased by 27.8 ⁇
  • the load (the capacitance value C S between the touch electrode layer and the additional electrode layer) only increases by 6.6%, which still meets the driving parameter requirements of the touch drive.
  • C S is the load (capacitance value) between the touch electrode layer and a cathode in conventional designs, is supported between the touch electrode layer and an additional electrode layer in the present design. It can be seen from the data in Table 2 that, in this embodiment, adding an additional electrode layer increases the load on the touch electrode layer, but the load on the touch electrode layer does not change much.
  • Cm is the basic mutual capacitance value of the touch electrode layer
  • ⁇ Cm is the amount of change in mutual capacitance
  • ⁇ Cm/Cm is the rate of change in mutual capacitance (ie touch sensitivity)
  • Cftx is the capacitance between the finger and the first electrode
  • Cfrx is the capacitance between the finger and the second electrode
  • Rs-Tx is the resistance of the first electrode
  • Rs-Rx is the resistance of the second electrode (during simulation, there is no additional electrode layer (ie, a parallel metal layer) connected to the second electrode, so the second electrode is in traditional design and The resistance value remains unchanged in the design of this scheme).
  • this embodiment also provides a method for manufacturing the display panel, as shown in FIG. 7a to FIG. 7c , including:
  • Step S01 preparing a display substrate 1, as shown in FIG. 7a;
  • the step includes sequentially preparing a driving circuit, a sub-pixel array, an encapsulation layer and a buffer layer on the substrate.
  • the display substrate 1 includes a base and a driving circuit, a sub-pixel array, an encapsulation layer and a buffer layer that are sequentially prepared on the base.
  • Step S02 preparing an additional electrode layer 3 and a touch electrode layer 2 on the light-emitting side of the display substrate;
  • This step includes sequentially preparing an additional electrode layer 3 , an insulating layer 4 and a touch electrode layer 2 on the buffer layer, as shown in FIG. 7 b .
  • Step S03 a planarization layer 5 , a first transparent adhesive layer 6 , a polarizer 7 , a second transparent adhesive layer 8 and a cover plate 9 are sequentially prepared on the touch electrode layer 2 , as shown in FIG. 7 c .
  • Embodiments of the present disclosure also provide a display panel.
  • the bridge portion 23 is electrically connected to the first additional electrode 31 and is spaced apart from the second additional electrode 32 , and the first electrode 21 and the second electrode 22 are grid-shaped ;
  • the additional electrode layer is grid-shaped.
  • first electrode 21 and the second electrode 22 shown in FIG. 8 are the same as the first electrode 21 and the second electrode 22 shown in FIG. 6 .
  • the subunit 200 includes a plurality of bridge parts 23 arranged in an array along the first direction Y and the second direction X, and the first additional electrodes 31 and the second additional electrodes 32 are arranged in the row or column where the bridge parts 23 are located middle.
  • the plurality of first additional electrodes 31 extend along the X direction; and the plurality of second additional electrodes 32 extend along the Y direction.
  • the first additional electrode 31 includes a plurality of first mesh electrodes, the extending direction of which is parallel to the extending direction of the lateral mesh lines in the first electrode 21 (ie, The second direction X), and the orthographic projection of the first additional electrode 31 on the display substrate 1 falls into the orthographic projection of the first electrode 21 on the display substrate 1 .
  • the first additional electrode 31 is connected to the first electrode 21 through a plurality of first via holes 41 opened in the insulating layer 4 .
  • the first additional electrode 31 is connected to the bridge portion 23 .
  • the parallel connection between the first additional electrode 31 and the first electrode 21 is realized, thereby reducing the overall resistance of the display panel, and further reducing the distance between the first electrode 21 and the second electrode 22 along the extending direction of the first electrode 21 .
  • the channel resistance between the first electrodes 21 reduces the difference of the resistance-capacitance product between one end of the first electrode 21 and the other end, and improves the uniformity of the power-on signal of the first electrode 21, thereby improving the linearity, accuracy, and reporting of the touch electrodes. speed, floating performance and other touch performance.
  • the second additional electrode 32 includes a plurality of second mesh electrodes, the extending direction of which is parallel to the extending direction of the vertical mesh lines in the second electrode 22 ( That is, the first direction Y), and the orthographic projection of the second additional electrode 32 on the display substrate 1 falls into the orthographic projection of the second electrode 22 on the display substrate 1, and the second additional electrode 32 is in phase with the first additional electrode 31. Disconnect at the intersection.
  • the second additional electrode 31 is connected to the second electrode 22 through a plurality of second via holes 42 opened in the insulating layer 4 .
  • the parallel connection between the second additional electrode 32 and the second electrode 22 is realized, thereby reducing the overall resistance of the display panel, and further reducing the distance between the first electrode 21 and the second electrode 22 along the extending direction of the second electrode 22 .
  • the channel resistance between the first electrodes 21 reduces the difference of the resistance-capacitance product between one end of the first electrode 21 and the other end, and improves the uniformity of the power-on signal of the first electrode 21, thereby improving the linearity, accuracy, and reporting of the touch electrodes. speed, floating performance and other touch performance.
  • the first additional electrode 31 is connected in parallel with the first electrode 21 through the first via hole 41 opened in the insulating layer 4 .
  • the first via hole 41 is opened in the insulating layer 4 , and 41 shown in FIG. 9 only represents the positional relationship between the first via hole and the additional electrode layer 3 .
  • the second additional electrode 32 is connected in parallel with the second electrode 22 through the second via hole 42 opened in the insulating layer 4 .
  • the second via hole 42 is opened in the insulating layer 4 , and 42 shown in FIG. 9 only represents the positional relationship between the second via hole and the additional electrode layer 3 .
  • the display panel further includes a second floating electrode 11 , the second floating electrode 11 and the additional electrode layer are arranged in the same layer, and the second floating electrode 11 and the additional electrode layer are insulated from each other;
  • the orthographic projections of the second floating electrode 11 and the additional electrode layer on the display substrate 1 overlap with the orthographic projections of the first floating electrode 10 and the touch electrode layer on the display substrate 1 .
  • the arrangement of the second floating electrode 11 can avoid the poor visual effect caused by the reflection of light from the side of the additional electrode layer when viewed from a side view angle, thereby avoiding the problem of visible metal lines of the additional electrode layer when viewed from a side view angle.
  • an additional electrode layer different from the touch electrode layer is provided, and the orthographic projection of at least one first additional electrode on the display substrate and the orthographic projection of the first electrode on the display substrate are made At least partially overlapping and connecting the first additional electrode in the additional electrode layer in parallel with the first electrode, and/or connecting the second additional electrode in the additional electrode layer in parallel with the second electrode, the first electrode and the second electrode can be connected in parallel.
  • the number of lines of force of the two electrodes in the edge region increases, so that the electric field between the first electrode and the second electrode in the edge region is enhanced, thereby increasing the amount of change in the mutual capacitance between the first electrode and the second electrode during touch control.
  • the touch sensitivity of the display panel can improve or avoid the problem of small change in mutual capacitance caused by thick film structure above the touch electrode layer or large load on the touch electrode, and it is difficult to detect whether the touch is touched; on the other hand,
  • the overall resistance of the display panel is reduced, and further along the extending direction of the first electrode and/or the second electrode , reduces the channel resistance of the first electrode and the second electrode, reduces the resistance-capacitance product difference between one end and the other end of the first electrode and/or the second electrode, and improves the power-on signal of the first electrode and/or the second electrode
  • the uniformity of the touch electrodes improves the linearity, accuracy, dot reporting rate, floating performance and other touch performance of the touch electrodes.
  • Embodiments of the present disclosure also provide a display device, including the display panel in the above-mentioned embodiments.
  • the change amount of the mutual capacitance of the touch electrodes of the display device during touch is increased, thereby improving the touch sensitivity of the display device, thereby improving or avoiding the touch sensitivity of the display device.
  • the thickness of the film layer above the control electrodes or the large load of the touch electrodes results in a small change in mutual capacitance, and it is difficult to detect whether the touch is touched, which improves the touch quality of the display device.
  • the display device provided by the embodiment of the present disclosure can be any product or component with display function, such as OLED panel, OLED TV, LED panel, LED TV, Micro LED panel, Micro LED TV, display, mobile phone, navigator, etc.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Position Input By Displaying (AREA)

Abstract

本公开提供一种显示面板和显示装置。该显示面板包括：显示基板和设置于所述显示基板出光侧的触控电极层，所述触控电极层包括至少一个第一电极和至少一个第二电极，所述至少一个第一电极和所述至少一个第二电极相互交叉并绝缘；其中，所述显示面板还包括：附加电极层，所述附加电极层与所述触控电极层不同层，所述附加电极层包括至少一个第一附加电极，所述至少一个第一附加电极在所述显示基板上的正投影与所述第一电极在所述显示基板上的正投影至少部分重叠；以及处于所述附加电极层与所述触控电极层之间的绝缘层，其中，所述至少一个第一附加电极通过开设在所述绝缘层中的至少一个第一过孔连接所述至少一个第一电极。

Description

一种显示面板和显示装置
相关申请的交叉引用
本申请要求于2020年7月24日提交的中国专利申请No.202010720017.X和于2020年9月28日提交的中国专利申请No.202011042892.3的优先权，所公开的内容以引用的方式合并于此。
技术领域
本公开属于显示技术领域，具体涉及一种显示面板和显示装置。
背景技术
当前OLED(Organic Light-Emitting Diode，有机发光二极管)显示技术中通常需要集成触控功能，通过在OLED显示基板上制备触控电极，能够实现OLED显示面板的触控显示。
发明内容
在本公开的第一方面，本公开提供一种显示面板，包括显示基板和设置于所述显示基板出光侧的触控电极层，所述触控电极层包括至少一个第一电极和至少一个第二电极，所述至少一个第一电极和所述至少一个第二电极相互交叉并绝缘；其中，所述显示面板还包括：附加电极层，所述附加电极层与所述触控电极层不同层，所述附加电极层包括至少一个第一附加电极，所述至少一个第一附加电极在所述显示基板上的正投影与所述第一电极在所述显示基板上的正投影至少部分重叠；以及处于所述附加电极层与所述触控电极层之间的绝缘层，其中，所述至少一个第一附加电极通过开设在所述绝缘层中的至少一个第一过孔连接所述至少一个第一电极。
在本公开的一些实施例中，所述附加电极层还包括至少一个第二附加电极， 所述至少一个第二附加电极与所述至少一个第一附加电极之间彼此绝缘；以及所述至少一个第二附加电极在所述显示基板上的正投影与所述第二电极在所述显示基板上的正投影至少部分重叠，并且通过开设在所述绝缘层中的至少一个第二过孔连接所述至少一个第二电极。
在本公开的一些实施例中，所述至少一个第一电极在所述显示基板上的正投影包括第一边缘区，所述至少一个第一附加电极在所述显示基板上的正投影与所述第一边缘区重叠；以及所述至少一个第二电极在所述显示基板上的正投影包括第二边缘区，所述至少一个第二附加电极在所述显示基板上的正投影与所述第二边缘区重叠。
在本公开的一些实施例中，所述附加电极层还包括至少一个桥部；所述至少一个桥部连接所述至少一个第一附加电极，所述第一电极包括位于所述至少一个第二电极中的一个第二电极两侧的两个第一电极块，所述至少一个桥部分别通过开设在所述绝缘层中的至少两个第三过孔将所述两个所述第一电极块电连接在一起；或者，所述至少一个桥部连接所述至少一个第二附加电极，所述第二电极包括位于所述至少一个第一电极中的一个第一电极两侧的两个第二电极块，所述至少一个桥部分别通过开设在所述绝缘层中的至少两个第三过孔将所述两个所述第二电极块电连接在一起。
在本公开的一些实施例中，所述至少一个第一过孔包括多个第一过孔，且所述多个第一过孔在所述显示基板上的正投影均匀地分布于所述至少一个第一附加电极在所述显示基板上的正投影与所述至少一个第一电极在所述显示基板上的正投影的重合区域。
在本公开的一些实施例中，所述至少一个第二过孔包括多个第二过孔，且所述多个第二过孔在所述显示基板上的正投影均匀地分布于所述至少一个第二附加电极在所述显示基板上的正投影与所述至少一个第二电极在所述显示基板上的正投影的重合区域。
在本公开的一些实施例中，所述至少一个第一附加电极包括多个第一附加电极，以及所述多个第一附加电极在所述显示基板上的正投影分布于所述至少 一个第一电极在所述显示基板上的正投影的部分或者整个第一边缘区。
在本公开的一些实施例中，所述至少一个第二附加电极包括多个第二附加电极，以及所述多个第二附加电极在所述显示基板上的正投影分布于所述至少一个第二电极在所述显示基板上的正投影的部分或者整个第二边缘区。
在本公开的一些实施例中，所述至少一个第一附加电极在所述显示基板上的正投影与所述至少一个第一电极在所述显示基板上的正投影重叠。
在本公开的一些实施例中，所述至少一个第二附加电极在所述显示基板上的正投影与所述至少一个第二电极在所述显示基板上的正投影重叠。
在本公开的一些实施例中，所述触控电极层包括多个子单元，所述子单元沿所述第一方向和所述第二方向以阵列方式排布；每个所述子单元包括至少一个所述第一电极和至少一个所述第二电极，所述第一电极和所述第二电极构分别包括沿所述第一方向延伸的多个第一叉指电极和多个第二叉指电极，所述第一叉指电极和所述第二叉指电极在所述第二方向上交替排布。
在本公开的一些实施例中，针对所述多个子单元中的每个子单元，所述附加电极层设置有对应的一个桥部。
在本公开的一些实施例中，所述第一电极和所述第二电极为网格状；所述附加电极层为网格状。
在本公开的一些实施例中，所述第一电极和所述第二电极包括钛/铝/钛的叠层材料。
在本公开的一些实施例中，所述附加电极层包括钛/铝/钛的叠层材料。
在本公开的一些实施例中，所述绝缘层包括氮化硅或氧化硅材料。
在本公开的一些实施例中，位于所述第一电极和所述第二电极的分界处的网格包括多个金属线，所述多个金属线中的至少两个具有断口，以使所述第一电极和第二电极电绝缘。
在本公开的一些实施例中，所述显示面板还包括第一浮置电极，所述第一浮置电极与所述触控电极层同层设置，且相互间隔且相互绝缘；所述第一浮置电极浮置。
在本公开的一些实施例中，所述显示面板还包括第二浮置电极，所述第二浮置电极与所述附加电极层同层设置，且所述第二浮置电极与所述附加电极层相互绝缘；所述第二浮置电极与所述附加电极层在所述显示基板上的正投影和所述第一浮置电极与所述触控电极层在所述显示基板上的正投影重叠。
在本公开的第二方面，还提供一种显示装置，包括根据本公开第一方面中任一实施例所述的显示面板。
附图说明
图1为本公开实施例一种显示面板中附加电极层的结构俯视示意图；
图2为本公开实施例一种显示面板中触控电极层的结构俯视示意图；
图3为本公开实施例一种显示面板的结构剖视示意图；
图4为本公开实施例一种显示面板中桥部位置的结构俯视示意图；
图5为本公开实施例另一种显示面板中附加电极层的结构俯视示意图；
图6为本公开实施例另一种显示面板中触控电极层的结构俯视示意图；
图7a至图7c为本公开实施例中显示面板的制备过程示意图；
图8为本公开另一实施例中显示面板中触控电极层的结构俯视示意图；
图9为本公开另一实施例中显示面板中附加电极层的结构俯视示意图；
图10为本公开另一实施例中显示面板的结构剖视示意图；
图11为本公开另一实施例中显示面板中附加电极层的电极的俯视示意图。
其中附图标记为：
1、显示基板；2、触控电极层；21、第一电极；210、第一电极块；22、第二电极；211、边缘区；23、桥部；200、子单元；3、附加电极层；31、第一附加电极；32、第二附加电极；4、绝缘层；41、第一过孔；42、第二过孔；43、第三过孔；5、平坦化层；6、第一透明胶层；7、偏光片；8、第二透明胶层；9、盖板；10、第一浮置电极。
22、第二电极；220、第二电极块；221、连接电极；11、第二浮置电极； 300、断口。
具体实施方式
为使本领域技术人员更好地理解本公开的技术方案，下面结合附图和具体实施方式对本公开一种显示面板和显示装置作进一步详细描述。
互容式触控驱动电极和感应电极之间的电容变化量是影响触控性能的重要指标。当OLED显示面板中触控电极上方的膜层结构变厚，或者由于触控电极与位于其下方的金属膜层(如阴极)之间形成较大电容，致使触控电极负载较大时，均会导致触控电极在互电容触控时的互容变化量很小(例如，主动笔与触控屏之间仅有几fF的互容变化量)。这些微小变化量不仅影响触控精度、线性度、抖动性等触控性能，而且容易被外部环境中的各种干扰覆盖，导致触控芯片(Touch IC)无法检测到是否发生触控。
针对触控电极上方膜层结构厚或者触控电极负载较大所导致的互电容触控时互容变化量小，而无法检测到是否发生触控的问题，本公开提供一种显示面板和显示装置。在本公开提供的显示面板中，通过设置附加电极层，增加了显示面板触控时的互电容变化量，提高了其触控灵敏度和精确度。
图1为本公开实施例一种显示面板中附加电极层的结构俯视示意图；图2为本公开实施例一种显示面板中触控电极层的结构俯视示意图；图3为本公开实施例一种显示面板的结构剖视示意图。如图1至图3所示，本公开实施例的显示面板包括：显示基板1和设置于显示基板1出光侧的触控电极层2，触控电极层2包括至少一个第一电极21和至少一个第二电极22，至少一个第一电极21和至少一个第二电极22相互交叉并绝缘；显示面板还包括附加电极层3，附加电极层3与触控电极层2不同层设置，附加电极层3包括至少一个第一附加电极31，至少一个第一附加电极31在显示基板1上的正投影与第一电极21在显示基板1上的正投影至少部分重叠；附加电极层3与触控电极层2之间设置有绝缘层4；该至少一个第一附加电极31通过开设在绝缘层4中的至少一个第 一过孔41连接到第一电极21。
在本公开的一些实施例中，第一附加电极31通过开设在绝缘层4中的第一过孔41与第一电极21并联。在本公开的一些实施例中，第一过孔是开设在绝缘层4中的，图2中所示的附图标记41仅表示第一过孔与触控电极层2的位置关系。
在本公开的一些实施例中，所述至少一个第一电极21在所述显示基板1上的正投影包括第一边缘区，所述至少一个第一附加电极31在所述显示基板1上的正投影与所述第一边缘区重叠。
可选地，附加电极层3还包括至少一个第二附加电极32，所述至少一个第二附加电极32与所述至少一个第一附加电极31之间彼此绝缘；至少一个第二附加电极32通过开设在绝缘层4中的至少一个第二过孔42连接至少一个第二电极22。所述至少一个第二附加电极32在所述显示基板1上的正投影与所述第二电极22在所述显示基板1上的正投影至少部分重叠，并且通过开设在所述绝缘层4中的至少一个第二过孔32连接所述至少一个第二电极22。
在本公开的一些实施例中，所述至少一个第二电极22在所述显示基板1上的正投影包括第二边缘区，所述至少一个第二附加电极32在所述显示基板1上的正投影与所述第二边缘区重叠。
图1中示出了边缘区211，其包括所述第一边缘区和所述第二边缘区。
在本公开的一些实施例中，边缘区211沿着第一方向(Y方向)或第二方向(X方向)延伸。例如，图2中所示的边缘区211，其对应于第一电极21的边缘和第二电极22的边缘。图1和图2只示出了沿Y方向延伸的边缘区211，沿X方向延伸的边缘区并未示出。如图1和图2所示，第一方向Y和第二方向X为显示面板所在平面内相互垂直的两个方向。
在本公开的一些实施例中，第一电极21为驱动电极，第二电极22为感应电极。替代地，第一电极21为感应电极，第二电极22为驱动电极。第一电极21和第二电极22相互交叉并绝缘，能够实现互电容触控。在边缘区211，第一电极21与第二电极22之间的电力线比较密集，使得在触控条件下，第一电极 21与第二电极22之间的电容变化量较大。因此，增加在边缘区211处的电力线，能提高显示面板的触控灵敏度。
设置与触控电极层2不同层的附加电极层3，且至少一个第一附加电极31在显示基板1上的正投影与第一电极21在显示基板1上的正投影至少部分重叠，且附加电极层3中的第一附加电极31连接到第一电极21。以此方式，第一电极21与第二电极22在边缘区211处的电力线数量增加，从而使第一电极21与第二电极22在边缘区211的电场增强，进而使触控时第一电极21和第二电极22之间的互电容变化量增加。进一步的，提高了该显示面板的触控灵敏度，并改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题。另一方面，通过使第一附加电极31与第一电极21并联连接，降低显示面板的总体电阻，进而沿第一电极21的延伸方向，降低了第一电极21和第二电极22的通道电阻，减小了第一电极21一端与另一端的电阻电容乘积差异，提升了第一电极21上电信号的均一性，从而提升了触控电极的线性度、精确度、报点率、浮地(Floating)性能等触控性能。
可选地，第一过孔41的数量为多个。第一过孔41在显示基板1上的正投影均匀地分布于至少一个第一附加电极31在显示基板1上的正投影与至少一个第一电极21在显示基板1上的正投影的重合区域。多个第一过孔41的设置，一方面，能够确保第一附加电极31与第一电极21之间电连接的牢固性；另一方面，使得第一附加电极31与第一电极21并联连接，进而降低了显示面板的总体电阻，有利于提升触控电极的触控性能。同时，能在第一过孔41的工艺制作上保留更大的工艺余量，降低工艺难度，提升良率。
在本公开的实施例中，如图1和图2所示，第一电极21、第一附加电极31与多个第一过孔41对应设置。
通过使附加电极层3中的第二附加电极32连接到第二电极22，能进一步增加第一电极21与第二电极22在边缘区211处的电力线的数量，从而进一步增强第一电极21与第二电极22在边缘区211的电场，进而进一步增加触控时第 一电极21和第二电极22之间的互电容变化量。进一步的，提高该显示面板的触控灵敏度，并进一步改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题。另一方面，通过使第二附加电极32与第二电极22并联连接，降低显示面板的总体电阻，进而沿第二电极22的延伸方向，降低了第一电极21和第二电极22的通道电阻，减小了第二电极22一端与另一端的电阻电容乘积差异，提升了第二电极22上电信号的均一性，从而进一步提升了触控电极的线性度、精确度、报点率、浮地性能等触控性能。
在本公开的一些实施例中，显示面板包括至少一个第一附加电极31和至少一个第二附加电极32，并且包括至少一个第一电极21和至少一个第二电极22。然而本公开不限于此。在本公开的其他实施例中，显示面板包括多个第一附加电极31和多个第二附加电极32，并且包括多个第一电极21和多个第二电极22，如图1和图2中所示。
在本公开的一些实施例中，第二附加电极32通过开设在绝缘层4中的第二过孔42与第二电极22并联。在本公开的一些实施例中，第二过孔42开设在绝缘层4中，并且图2中所示的42仅表示第二过孔与触控电极层2的位置关系。
可选地，第二过孔42的数量为多个，第二过孔42在显示基板1上的正投影均匀地分布于第二附加电极32在显示基板1上的正投影与第二电极22在显示基板1上的正投影的重合区域。多个第二过孔42的设置，一方面，能够确保第二附加电极32与第二电极22之间电连接的牢固性；另一方面，使得第二附加电极32与第二电极22并联连接，进而降低了显示面板的总体电阻，有利于提升触控电极的触控性能。同时，能在第二过孔42的工艺制作上保留更大的工艺余量，降低工艺难度，提升良率。
在本公开的实施例中，如图1和图2所示，第二电极22、第二附加电极32与多个第二过孔42对应设置。
需要说明的是，本实施例中，附加电极层3设置在显示基板1上。替代地，附加电极层3也可以设置于触控电极层2的远离显示基板1的一侧。
需要说明的是，附加电极层3可以只设置第一附加电极31，也可以只设置第二附加电极32。替代地，附加电极层3也可以既设置第一附加电极31，又设置第二附加电极32，如图1所示。
可选地，显示基板1包括设置有驱动电路的背板、设置在背板上的子像素阵列、用于对子像素进行封装的封装层；还包括设置于封装层上的缓冲层，缓冲层有利于在其上形成触控电极层2。在本公开的一些实施例中，子像素可以是OLED发光元件，也可以是LED或Micro LED发光元件。
可选地，该显示面板还包括依次设置于触控电极层2背离显示基板1一侧的平坦化层5、第一透明胶层6、偏光片7、第二透明胶层8和盖板9。第一透明胶层6用于将平坦化层5与偏光片7粘合在一起；第二透明胶层8用于将偏光片7与盖板9粘合在一起。偏光片7能起到降低显示面板对光线的反射率的作用。平坦化层5的厚度范围为0.1至20μm。
可选地，第一电极21和第二电极22同层设置。如图1和图4所示，附加电极层3还包括至少一个桥部23，至少一个桥部23在显示基板1上的正投影位于第一电极21和第二电极22的交叉位置在显示基板1上的正投影中。至少一个桥部23连接至少一个第一附加电极31。第一电极21包括位于第二电极22中的一个第二电极两侧的两个第一电极块210。至少一个桥部23通过开设在绝缘层4中的至少两个第三过孔43将两个第一电极块210电连接在一起。
替代地，至少一个桥部连接至少一个第二附加电极。第二电极包括位于至少一个第一电极中的一个第一电极两侧的两个第二电极块。至少一个桥部通过开设在绝缘层中的至少两个第三过孔将两个第二电极块电连接在一起(图中未示出)。
可选地，第一电极21和第二电极22同层设置。如图4所示，附加电极层3还包括至少一个桥部23，至少一个桥部23在显示基板1上的正投影位于第一电极21和第二电极22的交叉位置在显示基板1上的正投影中。至少一个桥部23与至少一个第一附加电极31电连接。第一电极21包括沿X方向延伸的位于至少一个第二电极22中的一个第二电极两侧的两个第一电极块210。至少一个桥 部23通过开设在绝缘层4中的至少两个第三过孔43将两个第一电极块210电连接在一起。
替代地，至少一个桥部与至少一个第二附加电极电连接，第二电极包括沿Y方向延伸的位于至少一个第一电极中的一个第一电极两侧的两个第二电极块。至少一个桥部通过开设在绝缘层中的至少两个第三过孔将两个第二电极块电连接在一起(图中未示出)。
具体地，在本公开的实施例中，如图1和图2所示，第一电极21在中间处是断开的，因此，第一电极21分成两个部分(即，第一电极块210)，而第二电极22未断开。在本公开的其他实施例中，如图5和图6所示，每个子单元200中的第一电极21在中间处可以是未断开的，而第二电极22是断开的，使得第二电极22包括两个部分(即，第二电极块220)。在本公开的实施例中，桥部23设置在与触控电极层2中的第一电极21或第二电极22的断开位置对应的位置处使得桥部23在显示基板1上的正投影位于第一电极21或第二电极22的断开位置处。进一步的，在第二电极22在中间处是断开的情况下，桥部23连接第一附加电极31且通过开设在绝缘层4中的第三过孔43将相邻的两个第二电极块220电连接在一起。替代地，在第一电极21在中间处是断开的情况下，桥部23连接第二附加电极32且通过开设在绝缘层中的第三过孔将相邻的两个第一电极块电连接在一起。
在本公开的一些实施例中，如图1中所示，显示面板包括设置在附加电极层3中的多个第一附加电极31和多个第二附加电极32，其中，每个第一附加电极31和每个第二附加电极32均沿Y方向延伸且均沿X方向排列；多个第一附加电极31成对设置，且多个第二附加电极32成对设置；每对第一附加电极31沿X方向排列；在每对第一附加电极31中的两个第一附加电极31相对的两侧均设置有一个第二附加电极32；其中，每个第二附加电极32在其长度方向上对应于桥部23的位置断开。在本公开的一些实施例中，如图1中所示，有七对第一附加电极31和七对第二附加电极32。
在本公开的一些实施例中，如图1和图2中所示，显示面板包括设置在触 控电极层2中的多个第一电极21和多个第二电极22，每个第一电极21和每个第二电极22分别与一对第一附加电极31和一对第二附加电极32对应。具体地，如图1和图2中所示，一对第一附加电极31在显示基板1上的正投影位于一个第一电极21在显示基板1上的正投影在宽度方向(X方向)上的两侧；一对第二附加电极32在显示基板1上的正投影位于一个第二电极22在显示基板1上的正投影在宽度方向(X方向)上的两侧。在本公开的一些实施例中，触控电极层2还包括沿Y方向延伸的第一浮置电极10，其分别位于触控电极层2的最外侧。
如图2中所示，有八个沿Y方向延伸的第一电极21和七个沿Y方向延伸的第二电极22，其中，最外侧的两个第一电极21中的每个的靠近相应第二电极22的一侧与附加电极层3中的最外侧的两个第一附加电极31连接，而最外侧的两个第一电极21中的每个的靠近相应第一浮置电极10的一侧不连接第一附加电极31。
另外，如图2所示，触控电极层2还包括沿X方向延伸的与沿Y方向延伸的多个第一电极21均相交的第一电极21，该沿X方向延伸的第一电极21在对应于桥部23的位置断开并且将沿Y方向延伸的多个第二电极22中的每个分成上下两个部分，以分别对应于断开的第二附加电极32。如图2所示，沿X方向延伸的第一电极21在对应于桥部23的位置断开(即，包括第一电极块210)，而经过对应于桥部23的位置的沿Y方向延伸的第二电极22未断开。然而本公开不限于此。在本公开的其他实施例中，沿X方向延伸的第一电极21在对应于桥部23的位置未断开，而经过对应于桥部23的位置的沿Y方向延伸的第二电极22断开(即，包括第二电极块220)，如图6所示，在每个子单元200中，相应的第一电极21和第二电极22以如此方式设置。
在本公开的一些实施例中，如图1至图4中所示，桥部23的长度方向与X方向重合，宽度方向与Y方向重合；桥部23通过开设在绝缘层4中的多个第三过孔43分别与在X方向上相邻的两个第一电极块210电连接(即，桥部23通过开设在绝缘层4中的多个第三过孔43将沿X方向延伸的在对应于桥部23的 位置断开的第一电极21电连接在一起)。然而本公开不限于此。在本公开的其他实施例中，桥部23的宽度方向与X方向重合，长度方向与Y方向重合；桥部23通过开设在绝缘层4中的多个第三过孔43分别与在Y方向上相邻的两个第二电极块220电连接(即，桥部23通过开设在绝缘层4中的多个第三过孔43将沿Y方向延伸的在对应于桥部23的位置断开的第二电极22电连接在一起)，如图5和图6所示，在每个子单元200中，相应的桥部23与断开的第二电极22以如此方式设置。
第一方向Y和第二方向X相互交叉，第一方向Y和第二方向X可以相互垂直，也可以相互不垂直。
需要说明的是，第一电极21、第二电极22和附加电极层3也可以分别设置在三个不同的层上，相比于此情况，在第一电极21和第二电极22同层设置，且连接第一电极21或第二电极22的桥部23与附加电极层3的第一附加电极31和第二附加电极32设置在另一层上的情况下，能够使显示面板的厚度减薄，且有利于触控电极触控精确度和触控灵敏度的提高。
可选地，第一附加电极31在显示基板1上的正投影分布于第一电极21在显示基板1上的正投影的部分或者整个第一边缘区。即，第一附加电极31可以在第一电极21的边缘的局部分布，也可以布满第一电极21的整个边缘。相对第一附加电极31分布于第一边缘区局部的情况，在第一附加电极31布满整个第一边缘区的情况下，能够更好地使第一电极21与第二电极22在边缘区211的电场增强，从而进一步使触控时第一电极21和第二电极22之间的互电容变化量增加，提高该显示面板的触控灵敏度，改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题，提升了触控品质。
可选地，第二附加电极32在显示基板1上的正投影分布于第二电极22在显示基板1上的正投影的部分或者整个第二边缘区。即，第二附加电极32可以在第二电极22的边缘的局部分布，也可以布满第二电极22的整个边缘。相对第二附加电极32分布于第二边缘区局部的情况，在第二附加电极32布满整个 第二边缘区的情况下，能够更好地使第一电极21与第二电极22在边缘区211的电场增强，从而进一步使触控时第一电极21和第二电极22之间的互电容变化量增加，提高该显示面板的触控灵敏度，改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题，提升了触控品质。
可选地，第一附加电极31可以不必为仅沿一个方向(如图2中的Y方向)延伸的线状电极，其可以具有与第一电极21相同的轮廓，即，第一附加电极31在显示基板1上的正投影为矩形且第一附加电极31在显示基板1上的正投影与第一电极21在显示基板1上的正投影重叠。如此设置，能够更好地使第一电极21与第二电极22在边缘区211的电场增强，从而进一步使触控时第一电极21和第二电极22之间的互电容变化量增加，提高该显示面板的触控灵敏度，改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题。
可选地，第二附加电极32可以不必为仅沿一个方向(如图2中的Y方向)延伸的线状电极，其可以具有与第二电极22相同的轮廓，即，第二附加电极32在显示基板1上的正投影为矩形且第二附加电极32在显示基板1上的正投影与第二电极22在显示基板1上的正投影重叠。如此设置，能够更好地使第一电极21与第二电极22在边缘区211的电场增强，从而进一步使触控时第一电极21和第二电极22之间的互电容变化量增加，提高该显示面板的触控灵敏度，改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题。
可选地，如图6所示，触控电极层2包括多个子单元200，子单元200呈阵列排布(如图6中所示的两行三列)；每个所述子单元200包括至少一个所述第一电极21和至少一个所述第二电极22，所述第一电极21和所述第二电极22构分别包括沿所述第一方向Y延伸的多个第一叉指电极和多个第二叉指电极，所述第一叉指电极和所述第二叉指电极在所述第二方向X上交替排布。所述第一方向Y为阵列的列方向；所述第二方向X为阵列的行方向。
在本公开的一些实施例中，每个子单元200可以包括至少一个第一电极21和至少一个第二电极22。然而本公开不限于此。在本公开的其他实施例中，每个子单元200可以包括多个第一电极21和多个第二电极22，如图6中所示。
如图5所示，示出了包括多个桥部23和第一附加电极31以及第二附加电极32的附加电极层3。其中，每个桥部23以及相应的第一附加电极31以及第二附加电极32的排列对应于一个子单元200。
在本公开的实施例中，对第一附加电极31、第二附加电极32、第一电极21和第二电极22的数量不做特殊要求。例如，图5中所示的第一附加电极31和第二附加电极32的数量与图1中所示的第一附加电极31和第二附加电极32的数量不同。图6中所示的每个子单元200的第一电极21和第二电极22的数量与图2中所示的第一电极21和第二电极22的数量不同。
可选地，如图6所示，第一电极21包括多个第一电极块210，相邻两个第一电极块210通过连接电极221电连接，连接电极221与第一电极块210同层设置。
需要说明的是，触控电极层2的图案及排布并不局限于图2和图6中所示的情况，其他任意的能够实现互电容触控的触控电极层2图案及排布均可应用于本实施例中。
可选地，如图1和图5所示，桥部23包括一个或多个，桥部23在显示基板1上的正投影位于第一电极21或第二电极22的断开位置处；第二方向X为阵列的行方向。桥部23的设置数量具体根据第一电极21或第二电极22的图形及排布确定。
可选地，第一附加电极31沿第一方向Y或第二方向X的宽度范围为3至500μm；第二附加电极32沿第一方向Y或第二方向X的宽度范围为3至500μm。第一附加电极31和第二附加电极32的该宽度范围设置，能够更好地使第一电极21与第二电极22在边缘区211的电场增强，从而进一步使触控时第一电极21和第二电极22之间的互电容变化量增加，提高该显示面板的触控灵敏度，改善或避免在触控电极层2上方膜层结构较厚或者触控电极层2负载较大所导致 的互电容变化量小、难以检测是否触控的问题。
可选地，第一电极21和第二电极22为网格状。附加电极层3为网格状。
可选地，如图6所示，位于第一电极21和第二电极22的分界处的网格包括多个金属线，多个金属线中的至少两个具有断口300，以使第一电极21和第二电极22电绝缘。
可选地，第一电极21和第二电极22包括钛/铝/钛的叠层材料；第一电极21和第二电极22的网格线宽范围为3至20μm，第一电极21和第二电极22的厚度范围为0.1至10μm。
可选地，附加电极层3包括钛/铝/钛的叠层材料，附加电极层3的网格线宽范围为3至20μm，附加电极层3的厚度范围为0.1至10μm。
可选地，绝缘层4包括氮化硅或氧化硅材料，绝缘层4的厚度范围为0.1至10μm。
上述各膜层的厚度设置，有利于减薄显示面板的厚度，并提升显示面板的触控性能。
可选地，显示面板还包括，如图6所示，第一浮置电极10，第一浮置电极10与触控电极层2同层设置，且第一浮置电极10与触控电极层2相互间隔且相互绝缘；第一浮置电极10独立设置且浮置。即，第一浮置电极10不与显示面板中的任何电极电连接，且未接入任何电信号。第一浮置电极10为网格状。在本公开的一些实施例中，第一浮置电极10是不与任何金属导电膜层连接的独立设置电极。通过设置第一浮置电极10够减小触控电极层2与位于其下方的其他导电膜层(如阴极膜层等)之间的电容，从而减小触控电极层2的负载，进而改善或避免触控电极层2负载较大所导致的互电容变化量小、难以检测是否触控的问题。
对传统显示面板和本实施例中的显示面板进行有限元仿真，本实施例中显示面板的叠层结构如表1所示，传统显示面板是仅通过桥部将触控电极层2中断开的第一电极或第二电极连接在一起(即，桥部将触控电极层2中两个第一电极块或两个第二电极块连接在一起)，而不包括如本公开实施例中的第一附加 电极和第二附加电极，其他膜层的设置如本实施例中显示面板的叠层结构。仿真结果如表2所示，可以看到本实施例中显示面板相对于传统显示面板，触控电极感应量提升40fF，提升38.6％，抗环境干扰能力强，同时第一电极21电阻由27.8Ω降到21Ω，负载(触控电极层与附加电极层之间的电容值C S)仅增加6.6％，仍然满足触控驱动的驱动参数要求。
表1
Figure PCTCN2021108135-appb-000001
表2
Figure PCTCN2021108135-appb-000002
在表2中，C S在传统设计中是触控电极层与阴极之间的负载(电容值)，在本方案设计中是触控电极层与附加电极层之间的负载。从表2中的数据可以看出，本实施例中增加一层附加电极层，对触控电极层的负载有增加，但触控电极层的负载变化不大。
Cm是触控电极层的基础互容值；
ΔCm是互电容变化量；ΔCm/Cm是互电容变化率(即触控灵敏度)；
Cftx是手指与第一电极之间的电容；Cfrx是手指与第二电极之间的电容；
Rs-Tx是第一电极的电阻；Rs-Rx是第二电极的电阻(仿真时，针对第二电极未设置与其连接的附加电极层(即并联金属层)，所以第二电极在传统设计和本方案设计中阻值不变)。
基于显示面板的上述结构，本实施例还提供一种该显示面板的制备方法，如图7a至图7c所示，包括：
步骤S01：制备显示基板1，如图7a所示；
该步骤包括在基底上依次制备驱动电路、子像素阵列、封装层和缓冲层。
在本公开的实施例中，如图7a所示，显示基板1包括基底以及在该基底上依次制备好的驱动电路、子像素阵列、封装层和缓冲层。
步骤S02：在显示基板的出光侧制备附加电极层3和触控电极层2；
该步骤包括在缓冲层上依次制备附加电极层3、绝缘层4和触控电极层2，如图7b所示。
步骤S03：在触控电极层2上依次制备平坦化层5、第一透明胶层6、偏光片7、第二透明胶层8和盖板9，如图7c所示。
上述制备方法中制备各膜层结构的工艺均采用传统工艺，这里不再赘述。
本公开实施例还提供一种显示面板。在本实施例中，如图8至图10所示，桥部23与第一附加电极31电连接，且与第二附加电极32间隔设置，第一电极21和第二电极22为网格状；附加电极层为网格状。
本实施例中，图8中所示的第一电极21和第二电极22与图6中所示的第一电极21和第二电极22相同。
本实施例中，子单元200包括沿第一方向Y和第二方向X阵列排布的多个桥部23，第一附加电极31和第二附加电极32设置在桥部23所在的行或列中。所述多个第一附加电极31沿X方向延伸；且所述多个第二附加电极32沿Y方向延伸。
本实施例中，在触控电极层的一个子单元200中，第一附加电极31包括多 条第一网状电极，其延伸方向平行于第一电极21中横向网格线的延伸方向(即第二方向X)，且第一附加电极31在显示基板1上的正投影落入第一电极21在显示基板1上的正投影中。第一附加电极31与第一电极21通过开设在绝缘层4中的多个第一过孔41连接。第一附加电极31连接桥部23。如此设置，实现了第一附加电极31与第一电极21的并联连接，从而降低了显示面板的总体电阻，进而沿第一电极21的延伸方向，降低了第一电极21与第二电极22之间的通道电阻，减小了第一电极21一端与另一端的电阻电容乘积差异，提升了第一电极21上电信号的均一性，从而提升了触控电极的线性度、精确度、报点率、浮地性能等触控性能。
本实施例中，在触控电极层的一个子单元200中，第二附加电极32包括多条第二网状电极，其延伸方向平行于第二电极22中竖向网格线的延伸方向(即第一方向Y)，且第二附加电极32在显示基板1上的正投影落入第二电极22在显示基板1上的正投影中，第二附加电极32在与第一附加电极31相交叉的位置处断开。第二附加电极31与第二电极22通过开设在绝缘层4中的多个第二过孔42连接。如此设置，实现了第二附加电极32与第二电极22的并联连接，从而降低了显示面板的总体电阻，进而沿第二电极22的延伸方向，降低了第一电极21与第二电极22之间的通道电阻，减小了第一电极21一端与另一端的电阻电容乘积差异，提升了第一电极21上电信号的均一性，从而提升了触控电极的线性度、精确度、报点率、浮地性能等触控性能。
在本公开的一些实施例中，第一附加电极31通过开设在绝缘层4中的第一过孔41与第一电极21并联。在本公开的一些实施例中，第一过孔41开设在绝缘层4中，并且图9中所示的41仅表示第一过孔与附加电极层3的位置关系。
在本公开的一些实施例中，第二附加电极32通过开设在绝缘层4中的第二过孔42与第二电极22并联。在本公开的一些实施例中，第二过孔42开设在绝缘层4中，并且图9中所示的42仅表示第二过孔与附加电极层3的位置关系。
本实施例中，如图11所示，显示面板还包括第二浮置电极11，第二浮置电极11与附加电极层同层设置，且第二浮置电极11与附加电极层相互绝缘；第 二浮置电极11和附加电极层在显示基板1上的正投影与第一浮置电极10和触控电极层在显示基板1上的正投影重叠。第二浮置电极11的设置，能够避免侧视角观看时，附加电极层侧面反射光线导致的视觉效果不良，从而避免侧视角观看时附加电极层金属线可见问题。
本实施例中显示面板的其他结构以及制备方法与上述实施例中相同，此处不再赘述。
本实施例中所提供的显示面板，通过设置与触控电极层不同层的附加电极层，且使至少一个第一附加电极在显示基板上的正投影与第一电极在显示基板上的正投影至少部分重叠，并使附加电极层中的第一附加电极与第一电极并联连接，和/或，使附加电极层中的第二附加电极与第二电极并联连接，能使第一电极与第二电极在边缘区的电力线数量增加，从而使第一电极与第二电极在边缘区的电场增强，进而使触控时第一电极和第二电极之间的互电容变化量增加，提高了该显示面板的触控灵敏度，改善或避免在触控电极层上方膜层结构较厚或者触控电极负载较大所导致的互电容变化量小、难以检测到是否触控的问题；另一方面，通过使第一附加电极与第一电极并联连接，和/或，使第二附加电极与第二电极并联连接，降低显示面板的总体电阻，进而沿第一电极和/或第二电极的延伸方向，降低了第一电极和第二电极的通道电阻，减小了第一电极和/或第二电极一端与另一端的电阻电容乘积差异，提升了第一电极和/或第二电极上电信号的均一性，从而提升了触控电极的线性度、精确度、报点率、浮地性能等触控性能。
本公开实施例还提供一种显示装置，包括上述实施例中的显示面板。
通过采用上述实施例中的显示面板，增加了该显示装置的触控电极在触控时的互电容变化量，从而提高了该显示装置的触控灵敏度，进而改善或避免该显示装置中由于触控电极上方膜层结构较厚或者触控电极负载较大所导致的互电容变化量小、难以检测到是否触控的问题，提升了该显示装置的触控品质。
本公开实施例所提供的显示装置可以为OLED面板、OLED电视、LED面板、 LED电视、Micro LED面板、Micro LED电视、显示器、手机、导航仪等任何具有显示功能的产品或部件。
可以理解的是，以上实施方式仅仅是为了说明本公开的原理而采用的示例性实施方式，然而本公开并不局限于此。对于本领域内的普通技术人员而言，在不脱离本公开的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本公开的保护范围。

Claims (20)

  1. 一种显示面板，包括显示基板和设置于所述显示基板出光侧的触控电极层，所述触控电极层包括至少一个第一电极和至少一个第二电极，所述至少一个第一电极和所述至少一个第二电极相互交叉并绝缘；
    其中，所述显示面板还包括：
    附加电极层，所述附加电极层与所述触控电极层不同层，所述附加电极层包括至少一个第一附加电极，所述至少一个第一附加电极在所述显示基板上的正投影与所述第一电极在所述显示基板上的正投影至少部分重叠；以及
    处于所述附加电极层与所述触控电极层之间的绝缘层，其中，所述至少一个第一附加电极通过开设在所述绝缘层中的至少一个第一过孔连接所述至少一个第一电极。
  2. 根据权利要求1所述的显示面板，其中，
    所述附加电极层还包括至少一个第二附加电极，所述至少一个第二附加电极与所述至少一个第一附加电极之间彼此绝缘；以及
    所述至少一个第二附加电极在所述显示基板上的正投影与所述第二电极在所述显示基板上的正投影至少部分重叠，并且通过开设在所述绝缘层中的至少一个第二过孔连接所述至少一个第二电极。
  3. 根据权利要求2所述的显示面板，其中，所述至少一个第一电极在所述显示基板上的正投影包括第一边缘区，所述至少一个第一附加电极在所述显示基板上的正投影与所述第一边缘区重叠；以及
    所述至少一个第二电极在所述显示基板上的正投影包括第二边缘区，所述至少一个第二附加电极在所述显示基板上的正投影与所述第二边缘区重叠。
  4. 根据权利要求2或3所述的显示面板，其中，所述附加电极层还包括至少一个桥部；
    所述至少一个桥部连接所述至少一个第一附加电极，所述第一电极包括位于所述至少一个第二电极中的一个第二电极两侧的两个第一电极块，所述至少一个桥部分别通过开设在所述绝缘层中的至少两个第三过孔将所述两个所述第一电极块电连接在一起；
    或者，
    所述至少一个桥部连接所述至少一个第二附加电极，所述第二电极包括位于所述至少一个第一电极中的一个第一电极两侧的两个第二电极块，所述至少一个桥部分别通过开设在所述绝缘层中的至少两个第三过孔将所述两个所述第二电极块电连接在一起。
  5. 根据权利要求1至4中任一项所述的显示面板，其中，所述至少一个第一过孔包括多个第一过孔，且所述多个第一过孔在所述显示基板上的正投影均匀地分布于所述至少一个第一附加电极在所述显示基板上的正投影与所述至少一个第一电极在所述显示基板上的正投影的重合区域。
  6. 根据权利要求2至5中任一项所述的显示面板，其中，所述至少一个第二过孔包括多个第二过孔，且所述多个第二过孔在所述显示基板上的正投影均匀地分布于所述至少一个第二附加电极在所述显示基板上的正投影与所述至少一个第二电极在所述显示基板上的正投影的重合区域。
  7. 根据权利要求1至6中任一项所述的显示面板，其中，所述至少一个第一附加电极包括多个第一附加电极，以及
    所述多个第一附加电极在所述显示基板上的正投影分布于所述至少一个第一电极在所述显示基板上的正投影的部分或者整个第一边缘区。
  8. 根据权利要求2至7中任一项所述的显示面板，其中，所述至少一个第二附加电极包括多个第二附加电极，以及
    所述多个第二附加电极在所述显示基板上的正投影分布于所述至少一个第二电极在所述显示基板上的正投影的部分或者整个第二边缘区。
  9. 根据权利要求1至8中任一项所述的显示面板，其中，所述至少一个第一附加电极在所述显示基板上的正投影与所述至少一个第一电极在所述显示基板上的正投影重叠。
  10. 根据权利要求2至9中任一项所述的显示面板，其中，所述至少一个第二附加电极在所述显示基板上的正投影与所述至少一个第二电极在所述显示基板上的正投影重叠。
  11. 根据权利要求1至10中任一项所述的显示面板，其中，所述触控电极层包括多个子单元，所述子单元沿所述第一方向和所述第二方向以阵列方式排布；
    每个所述子单元包括至少一个所述第一电极和至少一个所述第二电极，所述第一电极和所述第二电极构分别包括沿所述第一方向延伸的多个第一叉指电极和多个第二叉指电极，所述第一叉指电极和所述第二叉指电极在所述第二方向上交替排布。
  12. 根据权利要求11所述的显示面板，其中，针对所述多个子单元中的每个子单元，所述附加电极层设置有对应的一个桥部。
  13. 根据权利要求1至12中任一项所述的显示面板，其中，所述第一电极和所述第二电极为网格状；所述附加电极层为网格状。
  14. 根据权利要求1至13中任一项所述的显示面板，其中，所述第一电极和所述第二电极包括钛/铝/钛的叠层材料。
  15. 根据权利要求1至14中任一项所述的显示面板，其中，所述附加电极层包括钛/铝/钛的叠层材料。
  16. 根据权利要求1至15中任一项所述的显示面板，其中，所述绝缘层包括氮化硅或氧化硅材料。
  17. 根据权利要求13至16中任一项所述的显示面板，其中，位于所述第一电极和所述第二电极的分界处的网格包括多个金属线，所述多个金属线中的至少两个具有断口，以使所述第一电极和第二电极电绝缘。
  18. 根据权利要求1至17中任一项所述的显示面板，还包括第一浮置电极，所述第一浮置电极与所述触控电极层同层设置，且相互间隔且相互绝缘；
    所述第一浮置电极浮置。
  19. 根据权利要求18所述的显示面板，还包括第二浮置电极，所述第二浮置电极与所述附加电极层同层设置，且所述第二浮置电极与所述附加电极层相互绝缘；
    所述第二浮置电极与所述附加电极层在所述显示基板上的正投影和所述第一浮置电极与所述触控电极层在所述显示基板上的正投影重叠。
  20. 一种显示装置，其中，包括权利要求1至19中任意一项所述的显示面板。
PCT/CN2021/108135 2020-07-24 2021-07-23 一种显示面板和显示装置 WO2022017499A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/770,029 US20220391042A1 (en) 2020-07-24 2021-07-23 Display panel and display apparatus

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202010720017 2020-07-24
CN202010720017.X 2020-07-24
CN202011042892.3 2020-09-28
CN202011042892.3A CN113970979A (zh) 2020-07-24 2020-09-28 一种显示面板和显示装置

Publications (1)

Publication Number Publication Date
WO2022017499A1 true WO2022017499A1 (zh) 2022-01-27

Family

ID=79586036

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/108135 WO2022017499A1 (zh) 2020-07-24 2021-07-23 一种显示面板和显示装置

Country Status (3)

Country Link
US (1) US20220391042A1 (zh)
CN (1) CN113970979A (zh)
WO (1) WO2022017499A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024092405A1 (zh) * 2022-10-31 2024-05-10 京东方科技集团股份有限公司 触控结构、触控显示面板和电子装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103926728A (zh) * 2013-12-30 2014-07-16 上海天马微电子有限公司 一种集成触控功能的液晶显示装置
CN106201151A (zh) * 2016-08-31 2016-12-07 上海创功通讯技术有限公司 显示面板及电子设备
US20180004326A1 (en) * 2008-10-30 2018-01-04 Samsung Electronics Co., Ltd. Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10416821B2 (en) * 2016-07-04 2019-09-17 Boe Technology Group Co., Ltd. Touch substrate, touch display panel and touch display apparatus having the same, and fabricating method thereof
EP3674861B1 (en) * 2018-12-28 2022-05-04 LG Display Co., Ltd. Touch display device, touch panel, touch sensing circuit, and touch sensing method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180004326A1 (en) * 2008-10-30 2018-01-04 Samsung Electronics Co., Ltd. Touch controller having increased sensing sensitivity, and display driving circuit and display device and system having the touch controller
CN103926728A (zh) * 2013-12-30 2014-07-16 上海天马微电子有限公司 一种集成触控功能的液晶显示装置
CN106201151A (zh) * 2016-08-31 2016-12-07 上海创功通讯技术有限公司 显示面板及电子设备

Also Published As

Publication number Publication date
CN113970979A (zh) 2022-01-25
US20220391042A1 (en) 2022-12-08

Similar Documents

Publication Publication Date Title
WO2019218866A1 (zh) 触控结构及触控屏
EP3680759B1 (en) Touch substrate and preparation method therefor, and display panel
WO2020029371A1 (zh) 一种触摸屏及oled显示面板
US11579735B2 (en) Touch electrode layer and touch display device
CN108008862B (zh) 触控膜层、触控面板及其触控显示装置
WO2020029372A1 (zh) 一种触摸屏及oled显示面板
JP2021531538A (ja) タッチモジュール、タッチ表示基板及びタッチ表示装置
CN108470762B (zh) 一种柔性显示面板和显示装置
JP6266263B2 (ja) タッチパネル及びタッチパネルを備えた液晶表示装置
CN106249975B (zh) 一种触控屏、显示装置及触控屏的制作方法
WO2017045342A1 (zh) 触控基板及其制作方法和显示装置
CN106547405A (zh) 一种有机发光显示面板、装置及制作方法
WO2022000671A1 (zh) 触控组件及触控显示装置
US11703985B2 (en) Touch display device
CN105511146B (zh) 一种集成触控显示面板
US20230337477A1 (en) Display panel and manufacturing method thereof, alignment method
WO2022011784A1 (zh) 触控组件及触控显示装置
WO2017152581A1 (zh) 阵列基板及其制作方法以及显示装置
WO2019169882A1 (zh) 触控基板及其制造方法和显示装置
CN109508117A (zh) 触控面板
US20180188841A1 (en) Touch screen and touch sensing assembly thereof
WO2021196076A1 (zh) 触控结构、触控显示面板及电子装置
WO2022017499A1 (zh) 一种显示面板和显示装置
WO2022156341A1 (zh) 触控面板及其制备方法、显示触控装置
WO2022047800A1 (zh) 触控面板及其制备方法、显示装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21847033

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21847033

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 10.08.2023)

122 Ep: pct application non-entry in european phase

Ref document number: 21847033

Country of ref document: EP

Kind code of ref document: A1