WO2018032996A1 - 内嵌式透明触控显示面板及其制造方法、驱动方法 - Google Patents

内嵌式透明触控显示面板及其制造方法、驱动方法 Download PDF

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Publication number
WO2018032996A1
WO2018032996A1 PCT/CN2017/096393 CN2017096393W WO2018032996A1 WO 2018032996 A1 WO2018032996 A1 WO 2018032996A1 CN 2017096393 W CN2017096393 W CN 2017096393W WO 2018032996 A1 WO2018032996 A1 WO 2018032996A1
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WIPO (PCT)
Prior art keywords
electrode
touch
electrodes
display panel
transparent
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PCT/CN2017/096393
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English (en)
French (fr)
Inventor
杨盛际
董学
吕敬
陈小川
刘冬妮
王磊
卢鹏程
肖丽
岳晗
付杰
赵文卿
杨亚锋
Original Assignee
京东方科技集团股份有限公司
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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 EP17835786.9A priority Critical patent/EP3502851B1/en
Priority to US15/750,924 priority patent/US10754459B2/en
Publication of WO2018032996A1 publication Critical patent/WO2018032996A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • 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
    • 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
    • H10K59/80—Constructional details
    • H10K59/805—Electrodes
    • H10K59/8052—Cathodes
    • H10K59/80524—Transparent cathodes, e.g. comprising thin metal layers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to an in-cell transparent touch display panel, a manufacturing method thereof, and a driving method.
  • the transparent display (English name: Transparent Display) has attracted much attention from users, and it is also one of the hot spots in the field of flat panel displays.
  • Transparent Display Through the transparent display device, the user can also view the object behind the transparent display device while viewing the image displayed on the display device, and thus the transparent display device greatly expands the range and scene of the display application.
  • transparent display devices have been applied in many scenes such as display cabinets and window displays.
  • the transparent display technology mainly achieves the purpose of transparent display by increasing the transmittance of the display structure.
  • the structure of the liquid crystal display (English name: Liquid Crystal Display, referred to as: LCD) determines its overall transmittance is low.
  • the LCD double-layer polarizer (English name: Polarizer, POL for short) and the color filter (English name: Color Filter) greatly reduce the overall transmittance of the display device, so the transmittance of the LCD is usually Less than 15%, the transparency is not good.
  • organic light-emitting diode abbreviation: Organic Light-Emitting Diode, OLED for short
  • OLED Organic Light-Emitting Diode
  • the OLED display device comprises: an active matrix organic light emitting diode display (English full name: Active Matrix Organic Light Emitting Diode, abbreviation: AMOLED) and a passive passive organic light emitting diode display (English full name: Passive Matrix Organic Light Emitting Diode, Abbreviation: PMOLED).
  • AMOLED Active Matrix Organic Light Emitting Diode
  • PMOLED Passive Matrix Organic Light Emitting Diode
  • Embodiments of the present disclosure provide an in-cell transparent touch display panel, a manufacturing method thereof, and a driving method.
  • an in-cell transparent touch display panel including: a plurality of first electrodes on a transparent substrate, the first electrodes extending in a first direction; a pixel defining structure on the first electrodes, The pixel defining structure defines a plurality of pixel regions and a plurality of touch electrode regions on the transparent substrate, and the adjacent touch electrode regions include at least one pixel region; the organic electroluminescent layer disposed in the pixel region, a second electrode disposed on the organic electroluminescent layer and located in the pixel region, the second electrode extending in a second direction; a plurality of first touch electrodes extending in the first direction and located at the touch a second touch electrode that controls the electrode region and extends in the second direction.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all transparent electrodes, and the first direction intersects the second direction.
  • the pixel definition structure includes a plurality of resin strips, each of the resin strips extending in the second direction.
  • the in-cell transparent touch display panel further includes a retaining wall extending in a second direction on each of the resin strips, the retaining wall being between adjacent second electrodes, and adjacent ones Between the two electrodes and the second touch electrode, the second electrode and the second touch electrode are separated from each other by the adjacent second electrode.
  • the thickness of the retaining wall in a vertical direction perpendicular to the transparent substrate is greater than the thickness of each of the second electrode and the second touch electrode.
  • the cross section of the retaining wall in a direction perpendicular to the axial direction of the retaining wall, is a trapezoid having a first bottom edge larger than a second bottom edge, and the retaining wall passes through the second bottom edge
  • the pixel definition structure is in contact.
  • the retaining wall is formed from a negative photoresist material.
  • the retaining wall is formed from a resin material and is formed integrally with the pixel defining structure.
  • one of the first electrode and the second electrode is an anode, and the other is a cathode.
  • One of the first touch electrode and the second touch electrode is a touch driving electrode, and the other is a touch. Control the sensing electrode.
  • the first touch electrode is disposed in the same layer as the first electrode.
  • the second touch electrode is disposed in the same layer as the second electrode.
  • the in-cell transparent touch display panel further includes a bulk electrode disposed in a pixel region adjacent to the touch electrode region, and the bulk electrode is disposed in the same layer as the second electrode.
  • the bulk electrode is independent of the second electrode, and an orthographic projection of the bulk electrode on the transparent substrate overlaps the first touch electrode.
  • the second touch electrode includes an overlapping portion overlapping the first touch electrode, and the length of the overlapping portion along the first direction is smaller than the other of the second touch electrodes. A portion of the length along the first direction.
  • the in-cell transparent touch display panel further includes: a silver material layer disposed on the overlapping region of the first electrode and the second electrode and located on the first electrode.
  • the in-cell transparent touch display panel further includes a protective layer overlying the layer of silver material.
  • Another embodiment of the present disclosure provides a method for fabricating an in-cell transparent touch display panel, including: forming a plurality of first electrodes and a pixel defining structure on a transparent substrate, the first electrodes extending in a first direction
  • the pixel defining structure defines a plurality of pixel regions and a plurality of touch electrode regions on the transparent substrate, and at least one pixel region is included between adjacent touch electrode regions; forming an organic electroluminescent layer in the pixel region Forming a second electrode on the organic electroluminescent layer of the pixel region, the second electrode extending along the second direction; forming a plurality of first touch electrodes extending in the first direction and the touch electrode
  • the area forms a plurality of second touch electrodes, and the second touch electrodes extend in the second direction.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all made of a transparent material, and the first direction intersects the second direction.
  • the first electrode and the first touch electrode are formed by the same patterning process.
  • forming the pixel defining structure on the first electrode includes forming a plurality of resin strips independent of each other along the second direction.
  • the method further includes: forming a negative photoresist film layer on the transparent substrate on which the pixel defining structure is formed; setting a mask over the negative photoresist film layer and defining the pixel Exposing a negative photoresist of other regions than the corresponding regions of the structure; exposing the exposed negative photoresist film layer to form the retaining wall, where the retaining wall Between the adjacent second electrodes and between the adjacent second electrodes and the second touch electrodes, the second electrodes and the second touch electrodes that are separated or adjacent to the adjacent second electrodes are isolated.
  • forming a plurality of second electrodes on the organic electroluminescent layer of the pixel region and forming a plurality of second touch electrodes in the touch electrode region including: forming a retaining wall The electrode material film layer is evaporated on the transparent substrate to form a plurality of the second electrodes and a plurality of the second touch electrodes.
  • the method further includes forming a bulk electrode in a pixel region adjacent to the touch electrode region while forming the plurality of the second electrodes and the plurality of the second touch electrodes.
  • the method further includes: forming a layer of silver material at an overlap region of the first electrode and the second electrode.
  • the method further includes: forming a protective layer overlying the layer of silver material.
  • a further embodiment of the present disclosure provides a method for driving an in-line transparent touch display panel as previously described.
  • the method includes: dividing a frame time into a display phase and a touch phase during the touch display process; inputting an anode driving signal to the anode electrode and inputting a cathode driving signal to the cathode electrode during the display phase;
  • the touch drive signal is input to the touch drive electrode at the stage.
  • An embedded transparent touch display panel includes: a plurality of first electrodes on a transparent substrate, a pixel defining structure on the first electrode, and a pixel defining structure defining a plurality of extensions on the transparent substrate
  • the pixel area and the plurality of touch electrode areas include at least one pixel area between adjacent touch electrode areas.
  • the transparent touch display panel further includes an organic electroluminescent layer disposed on the pixel region and the touch electrode region, a second electrode disposed on the organic electroluminescent layer and located in the pixel region, and the first electrode extends along the first direction. The two electrodes extend in the second direction, and the first direction intersects the second direction.
  • the first electrode and the second electrode have overlapping regions, and thus can be illuminated and displayed by the organic electroluminescent layer that drives the overlapping regions.
  • the in-cell transparent touch display panel further includes: a plurality of first touch electrodes extending in the first direction; and a second touch electrode extending in the second direction in the touch electrode region, so the first touch The electrode and the second touch electrode enable the display panel to perform touch sensing.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all transparent electrodes, so that other regions than the overlapping regions of the first electrode and the second electrode can be used as the transparent region. That is, the display panel provided by the embodiment of the present disclosure can be used as a transparent display panel. Incorporating touch technology can be implemented in embodiments of the present disclosure The technology is integrated into a transparent OLED display panel.
  • FIG. 1 is a schematic structural diagram of an in-cell transparent touch display panel according to an embodiment of the present disclosure
  • FIG. 2 is a partial cross-sectional view of the in-cell transparent touch display panel shown in FIG. 1 according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of an in-cell transparent touch display panel according to an embodiment of the present disclosure
  • FIG. 4 is a schematic partial structural view of a PMOLED display panel provided by an embodiment of the present disclosure.
  • FIG. 5 is a schematic diagram of a display area and a light transmission area of an in-cell transparent touch display panel according to an embodiment of the present disclosure
  • Figure 6 is a schematic structural view of a retaining wall provided by an embodiment of the present disclosure.
  • Figure 7 is a cross-sectional view of a retaining wall provided by an embodiment of the present disclosure.
  • FIG. 8 is a schematic view for explaining a position of a bulk electrode region provided by an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a block electrode, a first electrode, a second electrode, a first touch electrode, and a second touch electrode included in a display panel according to an embodiment of the present disclosure
  • FIG. 10 is a schematic structural diagram of a block electrode, a first electrode, a second electrode, a first touch electrode, and a second touch electrode included in a display panel according to another embodiment of the present disclosure
  • FIG. 11 is a flow chart showing the steps of a method for manufacturing an in-cell transparent touch display panel according to an embodiment of the present disclosure
  • FIG. 12 is a waveform diagram of a display driving signal and a touch driving signal of an in-cell transparent touch display panel according to an embodiment of the present disclosure.
  • Embodiments of the present disclosure provide an in-cell transparent touch display panel.
  • the in-cell transparent touch display panel includes: a plurality of first electrodes 11 on a transparent substrate 10 , the first electrodes 11 extending in a first direction; and a pixel defining structure 12 on the first electrodes 11 ,
  • the pixel defining structure 12 defines a plurality of pixel regions 101 and a touch electrode region 102 on the transparent substrate 10, and at least one pixel region 101 is included between adjacent touch electrode regions 102.
  • the extension of the first electrode 11 in the first direction means that the longitudinal direction of the first electrode 11 is the first direction. Further, since the plurality of first electrodes each extend in the first direction, the plurality of first electrodes are parallel in the first direction. Illustratively, as shown in FIG. 1, the first electrode 11 may be a regular strip electrode. Of course, based on the embodiments of the present disclosure, those skilled in the art can also design the first electrode to have an irregular shape. For example, the length of the first electrode at different locations may vary. However, these are all reasonable modifications of the embodiments of the present disclosure, and therefore are all within the scope of the present invention.
  • the function of the pixel definition structure in the embodiment of the present disclosure is to divide the transparent substrate into regions, thereby facilitating setting corresponding layer structures in different regions.
  • the pixel definition structure includes a plurality of resin strips 12, each of which extends in a second direction.
  • the adjacent touch electrode region 102 when manufacturing the above-mentioned in-cell transparent touch display panel, those skilled in the art can set the adjacent touch electrode region 102 according to the size of the pixel region 101 and the actual required touch sensing electrode density.
  • the number of included pixel regions 101 is smaller. In the embodiment of the present disclosure, the number of pixel regions 101 included between adjacent touch electrode regions 102 is not limited.
  • a passivation layer may be formed on the transparent display panel 10 to buffer the first electrode 11 and the pixel defining structure 12. The role.
  • FIG. 2 is a partial cross-sectional view of the in-cell transparent touch display panel shown in FIG. 1 along the extending direction of the first electrode according to an embodiment of the present disclosure.
  • the in-cell transparent touch display panel further includes: a barrier wall 13 on each resin strip 12 in the pixel defining structure, an organic electroluminescent layer 14 disposed on the pixel region 101, and a The second electrode 15 on the electroluminescent layer 14 and located in the pixel region 101.
  • the second electrode 15 extends in the second direction.
  • the in-cell transparent touch display panel further includes: a plurality of first touch electrodes 16 extending in the first direction and a second electrode extending in the second direction The second touch electrode 17 is provided.
  • the first touch electrode 16 and the first electrode 11 are located on the same layer of the in-cell transparent touch display panel, and the second touch 17 electrode and the second electrode 15 are located in the in-line transparent touch.
  • the same layer of the control panel is described as an example, but the embodiment of the invention is not limited thereto.
  • the in-cell transparent touch display panel provided in the above embodiments is manufactured, a person skilled in the art can set the positions of the first touch electrode and the second touch electrode according to actual needs.
  • the first touch electrode and the first electrode are disposed in different layers.
  • the second touch electrode and the second electrode are disposed in different layers.
  • the first electrode 11, the second electrode 15, the first touch electrode 16, and the second touch electrode 17 are all transparent electrodes, and the first direction intersects with the second direction.
  • the first direction and the second direction may be substantially perpendicular.
  • FIG. 4 is a schematic partial structural view of a PMOLED display panel according to an embodiment of the present disclosure.
  • the cathode 41 and the anode 42 extend in mutually perpendicular directions, and the organic electroluminescent layer 43 is disposed between the cathode 41 and the anode 42.
  • the cathode 41 applies a DC voltage row by row
  • the anode 42 simultaneously applies a gray scale voltage
  • controls the luminance of the organic electroluminescent layer by controlling the voltages on both sides of the organic electroluminescent layer 43 in the overlapping region of the cathode and the anode.
  • the display of the PMOLED display panel is realized.
  • the first electrode 11 extends in the first direction
  • the pixel region 101 extends in the second direction
  • the second electrode 15 is located in the pixel region 101, so that the overlapping region of the first electrode 11 and the second electrode 15 is
  • the luminance of the display region 51 can be controlled by controlling the voltage applied to the first electrode 11 and the second electrode 15.
  • organic electricity in other regions than the display region 51 The light-emitting layer does not emit light, and the first electrode 11, the second electrode 15, the first touch electrode 16, and the second touch electrode 17 are all transparent electrodes. Therefore, other regions than the display region 51 are transparent to the display panel. Light area 52.
  • the in-cell transparent touch display panel provided by the embodiment of the present disclosure includes: a plurality of first electrodes and a pixel defining structure extending in a first direction disposed on the transparent substrate, wherein the pixel defining structure defines a plurality of pixels on the transparent substrate
  • the area and the plurality of touch electrode regions include at least one pixel region between adjacent touch electrode regions.
  • the in-cell transparent touch display panel may further include a barrier wall disposed on the pixel defining structure, an organic electroluminescent layer disposed on the pixel region and the touch electrode region, and disposed on the organic electroluminescent layer and located in the pixel region. a second electrode, the second electrode extending in the second direction, the first direction intersecting the second direction.
  • the first electrode and the second electrode have overlapping regions, and thus can be illuminated and displayed by driving the organic electroluminescent layer in the overlapping region.
  • the in-cell transparent touch display panel may further include a plurality of first touch electrodes extending in the first direction and second touch electrodes extending in the second direction in the touch electrode region, and thus, the first touch The control electrode and the second touch electrode enable the display panel to implement touch sensing.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all transparent electrodes, so that other regions than the overlapping regions of the first electrode and the second electrode can be used as the transparent region. That is, the display panel provided by the embodiment of the present disclosure can be used as a transparent display panel. Therefore, the embodiment of the present disclosure can integrate the in-cell touch technology into the transparent OLED display panel.
  • the first electrode 11 is an anode and the second electrode 15 is a cathode; alternatively; the first electrode 11 is a cathode and the second electrode 15 is an anode.
  • the first touch electrode 16 is a touch driving electrode
  • the second touch electrode 17 is a touch sensing electrode.
  • the first touch electrode 16 is a touch sensing electrode
  • the second touch electrode 17 is a touch driving device. electrode.
  • the first electrode 11 When the first electrode 11 is an anode and the second electrode 15 is a cathode, when driving is performed, a DC voltage is applied to the second electrode 15 row by row, and a gray scale voltage is applied to all of the first electrodes 11.
  • a DC voltage is applied to the first electrode 11 row by row, and a gray scale voltage is applied to all of the second electrodes 15. That is, the arrangement between the first electrode and the second electrode and the anode and cathode of the PMOLED display device is determined by the drive signal applied to the electrode regardless of the specific structure of the drive electrode.
  • the configuration of the first touch electrode, the second touch electrode, and the touch sensing electrode and the touch driving electrode of the PMOLED display device are independent of the specific structure of the touch driving electrode or the touch sensing electrode, and are applied to the electrode.
  • the drive signal is determined.
  • the first touch electrode 16 is disposed in the same layer as the first electrode 11.
  • the first touch electrode 16 and the first electrode 11 are formed on the same layer of electrode material by the same patterning process. If the first touch electrodes 16 and the first electrodes 11 are disposed in different layers, the first touch electrodes 16 and the first electrodes 11 need to be separately formed by two patterning processes. Therefore, the first touch electrode 16 is disposed in the same layer as the first electrode 11 to save a patterning process, thereby simplifying the process of manufacturing the in-cell transparent touch display panel provided by the above embodiments.
  • the second touch electrode 17 is disposed in the same layer as the second electrode 15.
  • the process of manufacturing the in-cell transparent touch display panel provided by the above embodiments can be simplified by arranging the second touch electrodes 17 and the second electrodes 15 in the same layer.
  • the retaining wall may be between adjacent second electrodes and between adjacent second electrodes and second touch electrodes to isolate adjacent second electrodes or adjacent ones The two electrodes are separated from the second touch electrodes.
  • the thickness of the retaining wall in a vertical direction perpendicular to the transparent substrate is greater than the thickness of each of the second electrode and the second touch electrode.
  • Fig. 7 is a cross-sectional view taken along line A-A' of Fig. 6.
  • the cross section of the retaining wall 13 is a trapezoid whose first bottom edge a is larger than the second bottom edge b, and the retaining wall is in contact with the pixel defining structure through the second bottom edge b.
  • the cross section of the retaining wall is a trapezoid with the upper bottom edge larger than the lower bottom edge
  • the second touch can be set in the same layer by making the cross section of the retaining wall a trapezoid with the upper bottom edge being larger than the lower bottom edge.
  • the electrode material film layer is directly evaporated on the electroluminescent layer, and the adjacent second electrode, the adjacent touch sensing electrode and the second electrode are separated by the retaining wall. Therefore, the second electrode and the second touch electrode structure in the above embodiment can be manufactured by one vapor deposition. Therefore, the embodiment of the present disclosure can further simplify the manufacturing process of the in-cell transparent touch display panel.
  • the retaining walls of the above embodiments are formed from a negative photoresist material.
  • the retaining wall may be formed of a resin material and formed integrally with the pixel defining structure.
  • the in-cell transparent touch display panel further includes a bulk electrode 18 disposed in the pixel region 101 adjacent to the touch electrode region 102 , and the bulk electrode 18 and the second electrode 15 same layer settings.
  • the bulk electrode 18 is independent of the second electrode 15, and the bulk electrode is in the The orthographic projection on the transparent substrate overlaps with the first touch electrode 16.
  • the bulk electrode 18 may be insulated from the second electrode 15 and the second touch electrode 17, for example, the material forming the retaining wall (for example, resin) may be used to isolate them, and the bulk electrode 18 is only electroluminescent.
  • the layer is in contact, so the bulk electrode 18 is in a floating state (English name: floating) state.
  • the orthographic projection of the bulk electrode on the transparent substrate overlaps with the first touch electrode 16 to mean that the bulk electrode 18 faces the first touch electrode 16 , so the bulk electrode 18 forms a flat surface with the first touch electrode 16 .
  • the capacitor utilizes the bootstrap principle of the panel capacitor to couple the touch drive signal (indicated by a dashed arrow in FIG. 9) applied to the first touch electrode 16 during touch driving to adjacent the bulk electrode 18.
  • the second touch electrode 17 further realizes release of the touch driving signal.
  • the second touch electrode 17 includes an overlapping portion overlapping the first touch electrode 16 , and the length d of the overlapping portion along the first direction is smaller than that of the second touch electrode. The length c of the other portion along the first direction.
  • the first length c is greater than the second length d, so that the facing area between the first touch electrode and the second touch electrode can be reduced, thereby reducing the formation of the panel capacitor by the first touch and the second touch electrode.
  • the parasitic coupling capacitance of the touch driving electrode and the touch sensing electrode is reduced, thereby improving the intensity and sensitivity of the touch signal.
  • the above design may also be beneficial to increase the total surface area of the second electrode, thereby ensuring the voltage drop of the second electrode (English name: IR Drop).
  • the in-cell transparent touch display panel of the above embodiment further includes: a silver material layer disposed on the overlapping region of the first electrode 11 and the second electrode 15 and located on the first electrode 11.
  • the overlapping area 51 of the first electrode 11 and the second electrode 15 corresponds to the display area of the in-cell transparent touch display panel according to the embodiment of the present disclosure, and the embodiment of the present disclosure further locates in the area.
  • the silver material layer on one of the electrodes 11 can reduce the light transmittance of the display region by the silver material, thereby improving the display effect.
  • the in-cell transparent touch display panel provided by the embodiment of the present disclosure may further include: a protective layer covering the silver material layer.
  • the silver material can be protected by a protective layer disposed on the silver material, thereby improving the reliability of the in-cell transparent touch display panel.
  • a further embodiment of the present disclosure provides a method for manufacturing an in-cell transparent touch display panel, and the method for manufacturing the in-cell transparent touch display panel can be used to fabricate any of the above implementations.
  • An in-line transparent touch display panel is provided. Specifically, referring to FIG. 11, the method includes:
  • the first electrode extends along the first direction.
  • the pixel defining structure defines a plurality of pixel regions and a plurality of touch electrode regions on the transparent substrate, and at least one pixel region is included between the adjacent touch electrode regions.
  • the organic electroluminescent layer can be formed in the pixel region and the touch electrode region by vapor deposition of the organic electroluminescent material.
  • the second touch electrode extends in the second direction.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all made of a transparent material, and the first direction intersects with the second direction.
  • the in-cell transparent touch display panel obtained by the in-cell transparent touch display panel manufacturing method provided by the embodiment of the present disclosure may include the following structure: a plurality of first electrodes and pixel definitions extending along the first direction on the transparent substrate
  • the pixel-defining structure defines a pixel region and a plurality of touch electrode regions on the transparent substrate, and at least one pixel region is disposed between adjacent touch electrode regions, and the organic electroluminescent layer disposed in the pixel region is disposed on the organic battery a second electrode on the light-emitting layer and located in the pixel region, the first direction intersects the second direction, so the first electrode and the second electrode have overlapping regions, and thus can be illuminated by the organic electroluminescent layer driving the overlapping region And display it.
  • the in-cell transparent touch display panel further includes: a plurality of first touch electrodes extending in the first direction; and a second touch electrode extending in the second direction in the touch electrode region, and therefore, the first touch The control electrode and the second touch electrode can realize touch sensing of the display panel.
  • the first electrode, the second electrode, the first touch electrode, and the second touch electrode are all made of a transparent electrode material, so Other regions than the overlapping regions of the electrode and the second electrode may be used as the light transmitting region, that is, the display panel provided by the embodiment of the present disclosure may serve as a transparent display panel.
  • the embodiment of the present disclosure can integrate the in-cell touch technology into the transparent OLED display panel.
  • the first electrode and the first touch electrode pass the same patterning process. Production formation.
  • the one-time patterning process generally includes processes such as exposure, development, etching, and peeling, which are not limited in the present disclosure.
  • the first electrode and the first touch electrode By forming the first electrode and the first touch electrode through the same patterning process, the number of patterning processes of the in-cell transparent touch display panel can be reduced, thereby simplifying the manufacturing process of the in-cell transparent touch display panel.
  • the step of forming a pixel defining structure on the first electrode may include forming a plurality of resin strips independent of each other along the second direction.
  • the resin strip can be in the same layer as the electroluminescent layer.
  • the manufacturing method of the in-cell transparent touch display panel may further include: forming a retaining wall along the second direction on each of the resin strips, the retaining wall being between the adjacent second electrodes, and the adjacent second electrode Between the second touch electrode and the second touch electrode, the retaining wall is used to isolate the adjacent second electrode or to isolate the adjacent second electrode and the second touch electrode.
  • the step of forming a retaining wall in the above embodiment may be implemented by the following steps:
  • S122 arranging a mask over the negative photoresist film layer and exposing the negative photoresist in a region other than the corresponding region of the pixel definition structure.
  • the cross-section of the retaining wall obtained by the above steps is a trapezoid whose upper base is larger than the lower base.
  • the step of fabricating the second electrode in the pixel region and the step of fabricating the second touch electrode in the touch electrode region in the above embodiment may specifically be:
  • the electrode material film layer is evaporated on the transparent substrate on which the barrier wall is formed to form a plurality of second electrodes and a plurality of second touch electrodes.
  • the retaining wall can automatically bring the adjacent second electrode and the adjacent second electrode and the second during the evaporation process.
  • the touch electrodes are isolated to form a second touch electrode and a second electrode.
  • the second touch electrode and the second electrode can be formed by one evaporation process, and the patterning process for fabricating the second touch electrode and the second electrode is omitted, so that the embodiment of the present disclosure can simplify the embedded transparent touch. Control the manufacturing process of the display panel.
  • the method further includes forming a bulk electrode in a pixel region adjacent to the touch electrode region while forming the plurality of second electrodes and the plurality of second touch electrodes. That is, the electrode material film layer is vapor-deposited on the transparent substrate on which the barrier wall is formed to form the second electrode, Two touch electrodes and a block electrode.
  • the method further includes: forming a layer of silver material at an overlap region of the first electrode and the second electrode.
  • the overlapping region of the first electrode and the second electrode provides a display area of the in-cell transparent touch display panel in the embodiment of the present disclosure.
  • the silver material layer covering the first electrode is disposed in the region, so The material reduces the light transmittance of the display area, thereby improving the display effect.
  • the method further comprises: forming a protective layer covering the layer of silver material.
  • the silver material can be protected by a protective layer disposed on the silver material, thereby improving the reliability of the in-cell transparent touch display panel.
  • the embodiment of the present disclosure provides a method for driving an in-cell transparent touch display panel.
  • the driving method of the in-cell transparent touch display panel is used to drive the in-cell transparent touch display panel provided by any of the above embodiments.
  • the method comprises the following steps:
  • one frame time is divided into a display phase and a touch phase
  • the touch driving signal is input to the touch driving electrode during the touch phase.
  • FIG. 12 is a waveform diagram of voltages of an anode, a touch driving electrode, and a touch sensing electrode of the in-cell transparent touch display panel.
  • the synchronization signal is high
  • the anode input ground voltage value of the embedded transparent touch display panel
  • the touch drive electrode sequentially inputs the pulse touch drive signal
  • the touch sensing electrode senses the input touch drive electrode.
  • the touch driving signal forms a pulse voltage signal and detects whether the touch operation and the position where the touch operation occurs are detected by detecting the pulse voltage signal on the touch sensing electrode.
  • the synchronization signal is low level
  • the anode input gray scale voltage value of the embedded transparent touch display panel the cathode inputs the same DC voltage
  • the touch driving electrode and the touch sensing electrode are all floated
  • the embedded type is embedded.
  • the transparent touch display panel realizes the illumination of the organic electroluminescent layer by controlling the input voltages of the anode and the cathode, thereby performing display.
  • the display driving of the in-cell transparent touch display panel is separated from the touch driving by means of time-division driving, thereby avoiding mutual interference between the touchable driving signal and the display driving signal.
  • anode, the cathode, the touch driving electrode and the touch sensing electrode of the in-cell transparent touch display panel are both insulated, so that possible implementation in the present disclosure In the example, display driving and touch can also be performed simultaneously. drive. .

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Abstract

一种内嵌式透明触控显示面板及其制造方法、驱动方法，涉及显示技术领域。透明触控显示面板包括：设置于透明基板(10)上第一电极(11)和像素定义结构(12)；第一电极(11)沿第一方向延伸，像素定义结构(12)定义出多个像素区域(101)和触控电极区域(102)；设置于像素区域(101)的有机电致发光层(14)、设置于有机电致发光层(14)上且位于像素区域(101)的第二电极(15)，第二电极(15)沿第二方向；多个沿第一方向的第一触控电极(16)和位于触控电极区域(102)且沿第二方向的第二触控电极(17)。第一、第二、第一触控、第二触控电极均为透明电极，第一、第二方向相交。

Description

内嵌式透明触控显示面板及其制造方法、驱动方法
相关申请的交叉引用
本申请要求于2016年8月19日向中国专利局提交的专利申请201610698497.8的优先权利益，并且在此通过引用的方式将该在先申请的内容并入本文。
技术领域
本公开涉及显示技术领域，尤其涉及一种内嵌式透明触控显示面板及其制造方法、驱动方法。
背景技术
透明显示器(英文名称：Transparent Display)作为一种新型显示设备备受用户关注，同样也是当前平板显示器领域的热点之一。通过透明显示装置，用户在观看显示装置上所显示图像的同时，还可以观看透明显示装置后方的物体，因此透明显示装置极大的扩展了显示应用的范围和场景。目前，透明显示装置已在展示柜、橱窗等许多场景中得到了应用。
目前，透明显示技术主要是通过提升显示器结构的透过率来达到透明显示的目的。液晶显示器(英文全称：Liquid Crystal Display，简称：LCD)的结构决定了其整体透过率较低。具体的，LCD的双层偏光片(英文全称：Polarizer，简称：POL)以及彩色滤光片(英文全称：Color Filter)极大降低了显示器件的整体透过率，所以通常LCD的透过率小于15％，透明效果不佳。相比LCD，有机电激发光二极管(简称：Organic Light-Emitting Diode，简称：OLED)显示器不但工艺制程相对简单，而且OLED具有良好的透过率，所以OLED显示器是目前透明显示装置重点研究方向。OLED显示装置包括：有源矩阵有机电激发光二极管显示器(英文全称：Active Matrix Organic Light Emitting Diode，简称：AMOLED)和无源被动式有机电激发光二极管显示器(英文全称：Passive Matrix Organic Light Emitting Diode，简称：PMOLED)。
此外，为了进一步的实现人机互动，提高用户体验，还提出了触控式显示面板，而内嵌式触控(英文名称：In-Cell Touch)显示面板更是触控显示技术发展的主流。目前，内嵌式触摸(In cell touch)技术已经成功应用到LCD显示器上，但由于技术和良率的限制，目前嵌式触 控显示技术尚未在OLED中广泛应用。
发明内容
本公开的实施例提供一种内嵌式透明触控显示面板及其制造方法、驱动方法。
第一方面，提供一种内嵌式透明触控显示面板，包括：透明基板上的多个第一电极，所述第一电极沿第一方向延伸；第一电极上的像素定义结构，所述像素定义结构在所述透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域；设置于所述像素区域的有机电致发光层、设置于所述有机电致发光层上且位于所述像素区域的第二电极，所述第二电极沿第二方向延伸；多个沿第一方向延伸的第一触控电极和位于所述触控电极区域且沿第二方向延伸的第二触控电极。第一电极、所述第二电极、所述第一触控电极、所述第二触控电极均为透明电极，所述第一方向与所述第二方向相交。
在一些实施例中，像素定义结构包括多个树脂条，每个树脂条沿所述第二方向延伸。
在一些实施例中，内嵌式透明触控显示面板还包括在每个树脂条上沿第二方向延伸的挡墙，所述挡墙处于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，以将相邻的第二电极隔离或者相邻的第二电极和第二触控电极隔离。
在一些实施例中，所述挡墙在与透明基板垂直的竖直方向上的厚度大于第二电极和第二触控电极中的每一个的厚度。
在一些实施例中，沿与所述挡墙轴向垂直的方向，所述挡墙的截面为第一底边大于第二底边的梯形，所述挡墙通过所述第二底边与所述像素定义结构相接触。
在一些实施例中，挡墙由负性光刻胶材料制作形成。
替代性地，在一些实施例中，挡墙由树脂材料形成，并与所述像素定义结构形成为一体。
在一些实施例中，第一电极和第二电极中的一个为阳极，另一个为阴极，所述第一触控电极和第二触控电极中的一个为触控驱动电极，另一个为触控感应电极。
在一些实施例中，第一触控电极与所述第一电极同层设置。
在一些实施例中，第二触控电极与所述第二电极同层设置。
在一些实施例中，内嵌式透明触控显示面板还包括设置于与触控电极区域相邻的像素区域内的块状电极，所述块状电极与所述第二电极同层设置。
在一些实施例中，块状电极独立于所述第二电极，并且所述块状电极在所述透明基板上的正投影与第一触控电极重叠。
在一些实施例中，第二触控电极包括与所述第一触控电极交叠的交叠部分，所述交叠部分沿所述第一方向的长度小于所述第二触控电极的其它部分沿所述第一方向的长度。
在一些实施例中，内嵌式透明触控显示面板还包括：设置于所述第一电极和所述第二电极的交叠区域且位于所述第一电极上的银材料层。
在一些实施例中，内嵌式透明触控显示面板还包括覆盖于所述银材料层上的保护层。
本公开的另一实施例提供了一种内嵌式透明触控显示面板的制造方法，包括：在透明基板上形成多个第一电极和像素定义结构，所述第一电极沿第一方向延伸，所述像素定义结构在所述透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域；在像素区域内形成有机电致发光层；在所述像素区域的有机电致发光层上形成第二电极，所述第二电极沿第二方向延伸；形成多个沿第一方向延伸的第一触控电极以及在所述触控电极区域形成多个第二触控电极，所述第二触控电极沿第二方向延伸。所述第一电极、所述第二电极、所述第一触控电极、所述第二触控电极均采用透明材料制作，所述第一方向与所述第二方向相交。
在一些实施例中，第一电极与所述第一触控电极通过同一次构图工艺制作形成。
在一些实施例中，在第一电极上形成像素定义结构包括：沿所述第二方向形成多个彼此独立的树脂条。
在一些实施例中，方法还包括：在形成有像素定义结构的透明基板上形成负性光刻胶膜层；在所述负性光刻胶膜层上方设置掩膜板并对所述像素定义结构对应区域以外的其他区域的负性光刻胶进行曝光；对曝光后的负性光刻胶膜层进行显影形成所述挡墙，所述挡墙处 于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，以将相邻的第二电极隔离或者相邻的第二电极和第二触控电极隔离。
在一些实施例中，在所述像素区域的有机电致发光层上形成多个第二电极以及所述在所述触控电极区域形成多个第二触控电极，包括：在形成有挡墙的透明基板上蒸镀电极材料膜层形成多个所述第二电极和多个所述第二触控电极。
在一些实施例中，方法还包括：在形成多个所述第二电极和多个所述第二触控电极的同时，在与触控电极区域相邻的像素区域内形成块状电极。
在一些实施例中，方法还包括：在所述第一电极与所述第二电极的交叠区域制作银材料层。
在一些实施例中，方法还包括：制作覆盖所述银材料层的保护层。
本公开的另外的实施例提供了一种用于驱动如前所述的内嵌式透明触控显示面板的方法。该方法包括：在触控显示过程中，将一帧时间划分为显示阶段和触控阶段；在显示阶段向所述阳极电极输入阳极驱动信号、向所述阴极电极输入阴极驱动信号；在触控阶段向触控驱动电极输入触控驱动信号。
本公开实施例提供的一种内嵌式透明触控显示面板，包括：透明基板上的多个第一电极，第一电极上的像素定义结构，像素定义结构在透明基板上定义出多个延伸的像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域。透明触控显示面板还包括设置于像素区域和触控电极区域的有机电致发光层、设置于有机电致发光层上且位于像素区域的第二电极，第一电极沿第一方向延伸，第二电极沿第二方向延伸，第一方向与第二方向相交。因此，第一电极和第二电极具有交叠区域，进而可以通过驱动交叠区域的有机电致发光层进行发光并进行显示。此外，内嵌式透明触控显示面板还包括：多个沿第一方向延伸的第一触控电极和位于触控电极区域且沿第二方向延伸的第二触控电极，因此第一触控电极和第二触控电极能够使显示面板进行触控感应。进一步的，第一电极、第二电极、第一触控电极、第二触控电极均为透明电极，因此在第一电极和第二电极的交叠区域以外的其他区域均可以作为透光区域，即，本公开实施例提供的显示面板可以作为透明显示面板。本公开实施例可以将内嵌式触控技 术整合于透明OLED显示面板中。
附图说明
为了更清楚地说明本公开实施例的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开的实施例提供的内嵌式透明触控显示面板的示意性结构图；
图2为本公开的实施例提供的如图1所示的内嵌式透明触控显示面板的部分截面图；
图3为本公开的实施例提供的内嵌式透明触控显示面板的示意性结构图之三；
图4为本公开的实施例提供的PMOLED显示面板的示意性局部结构图；
图5为本公开的实施例提供的内嵌式透明触控显示面板的显示区域和透光区域的位置示意图；
图6为本公开的实施例提供的挡墙的示意性结构图；
图7为本公开的实施例提供的挡墙的截面图；
图8为用于说明本公开的实施例提供的块状电极区域的位置的示意图；
图9为本公开的实施例提供的显示面板所包括的块状电极、第一电极、第二电极、第一触控电极和第二触控电极的示意结构图；
图10为本公开的另一实施例提供的显示面板所包括的块状电极、第一电极、第二电极、第一触控电极和第二触控电极的示意结构图；
图11为本公开的实施例提供的内嵌式透明触控显示面板的制造方法的步骤流程图；
图12为本公开的实施例提供的内嵌式透明触控显示面板的显示驱动信号和触控驱动信号的波形图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普 通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明的是，为了便于清楚描述本公开实施例的技术方案，在本公开的实施例中，采用了“第一”、“第二”等字样对功能和作用基本相同的相同项或相似项进行区分，本领域技术人员可以理解“第一”、“第二”等字样并不是在对数量和次序方面进行限定。
本公开的实施例提供一种内嵌式透明触控显示面板。参照图1所示，该内嵌式透明触控显示面板包括：透明基板10上的多个第一电极11，第一电极11沿第一方向延伸；第一电极11上的像素定义结构12，像素定义结构12在透明基板10上定义出多个像素区域101和触控电极区域102，相邻触控电极区域102之间包括至少一个像素区域101。
第一电极11沿第一方向延伸是指第一电极11的长度方向为第一方向。此外，因为多个第一电极均沿第一方向延伸，所以多个第一电极在第一方向上平行。示例性的，如图1中所示，第一电极11可以为规则的条状电极。当然，在本公开实施例的基础上，本领域技术人员也可以将第一电极设计为不规则形状。例如，第一电极不同位置处的长度可以不同。但这都属于本公开实施例的合理变通方案，因此均因属于本发明的保护范围之内。此外，从以上对像素定义结构的描述可知，本公开实施例中的像素定义结构的作用是对透明基板进行区域划分，进而以便于在不同区域中设置相应的层结构。在一些实施例中，像素定义结构包括多个树脂条12，每个树脂条12沿第二方向延伸。
需要说明的是，在制造上述内嵌式透明触控显示面板时，本领域技术人员可以根据像素区域101的尺寸以及实际要求的触控感应电极密度来设置相邻触控电极区域102之间包含的像素区域101的数量。要求触控感应电极的密度越小，则相邻触控电极区域102之间包含的像素区域101的数量越多，要求触控感应电极的密度越大，则相邻触控电极区域102之间包含的像素区域101的数量越少。本公开实施例中对相邻触控电极区域102之间包含的像素区域101的数量不进行限定。
示例性的，在透明基板10上制作第一电极11和像素定义结构12之前，还可以先在透明显示面板10上制作钝化层，从而对第一电极11和像素定义结构12起到缓冲平坦的作用。
进一步的，参照图2所示，图2为本公开的实施例提供的如图1所示的内嵌式透明触控显示面板沿第一电极延伸方向的局部剖面图。从图2可以看出，该内嵌式透明触控显示面板还包括：像素定义结构中的每个树脂条12上的挡墙13、设置于像素区域101有机电致发光层14、设置于有机电致发光层14上且位于像素区域101的第二电极15。第二电极15沿第二方向延伸。
再进一步的，参照图3所示，该内嵌式透明触控显示面板还包括：多个沿第一方向延伸的第一触控电极16和位于触控电极区域102且沿第二方向延伸的第二触控电极17。
需要说明的是，图3中以第一触控电极16与第一电极11位于内嵌式透明触控显示面板的同一层、第二触控17电极与第二电极15位于内嵌式透明触控显示面板的同一层为例进行说明，但本发明实施例并不限定于此。在制造上述实施例提供的内嵌式透明触控显示面板时，本领域技术人员可以根据实际需求对第一触控电极以及第二触控电极的位置进行设置。例如，将第一触控电极与第一电极设异层设置。再例如，将第二触控电极与第二电极异层设置。
第一电极11、第二电极15、第一触控电极16、第二触控电极17均为透明电极，第一方向与第二方向相交。例如，第一方向和第二方向可以大致垂直。
以下，对上述实施例提供的内嵌式透明触控显示面板的原理进行说明。
参照图4所示，图4为根据本公开的一个实施例的PMOLED显示面板的示意性局部结构图。其阴极41和阳极42分别向相互垂直的方向延伸，有机电致发光层43设置于阴极41和阳极42之间。在进行显示时，阴极41逐行施加直流电压，阳极42同时施加灰阶电压，通过控制阴极和阳极交叠区域内的有机电致发光层43两侧电压实现有机电致发光层发光亮度的控制，进而实现PMOLED显示面板的显示。
参照图5所示，第一电极11沿第一方向延伸，像素区域101沿第二方向延伸，第二电极15位于像素区域101内，因此第一电极11和第二电极15的交叠区域即为上述内嵌式透明触控显示面板的显示区域51，通过控制向第一电极11和第二电极15施加的电压可以控制显示区域51的发光亮度。此外，除显示区域51以外的其他区域的有机电 致发光层不进行发光，且第一电极11、第二电极15、第一触控电极16、第二触控电极17均为透明电极，因此除显示区域51以外的其他区域为显示面板的透光区域52。
本公开实施例提供的内嵌式透明触控显示面板包括：设置于透明基板上的多个沿第一方向延伸的第一电极和像素定义结构，像素定义结构在透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域。内嵌式透明触控显示面板还可包括设置于像素定义结构上的挡墙、设置于像素区域和触控电极区域的有机电致发光层、设置于有机电致发光层上且位于像素区域的第二电极，第二电极沿第二方向延伸，第一方向与第二方向相交。因此，第一电极和第二电极具有交叠区域，进而可以通过驱动交叠区域内的有机电致发光层进行发光并进行显示。此外，内嵌式透明触控显示面板还可包括多个沿第一方向延伸的第一触控电极和位于触控电极区域且沿第二方向延伸的第二触控电极，因此，第一触控电极和第二触控电极能够使显示面板实现触控感应。进一步的，第一电极、第二电极、第一触控电极、第二触控电极均为透明电极，因此在第一电极和第二电极的交叠区域以外的其他区域均可以作为透光区域，即，本公开实施例提供的显示面板可以作为透明显示面板。因此，本公开实施例可以将内嵌式触控技术整合于透明OLED显示面板中。
在一些实施例中，第一电极11为阳极，第二电极15为阴极；替代性地；第一电极11为阴极，第二电极15为阳极。第一触控电极16为触控驱动电极，第二触控电极17为触控感应电极；替代性地，第一触控电极16为触控感应电极，第二触控电极17为触控驱动电极。
若第一电极11为阳极且第二电极15为阴极，进行驱动时，逐行向第二电极15施加直流电压，向全部第一电极11施加灰阶电压。若第一电极11为阴极且第二电极15为阳极，进行驱动时，逐行向第一电极11施加直流电压，向全部第二电极15施加灰阶电压。即，第一电极、第二电极与PMOLED显示装置的阳极、阴极之间的配置与驱动电极的具体结构无关，由施加在电极上的驱动信号确定。同样，第一触控电极、第二触控电极与PMOLED显示装置的触控感应电极、触控驱动电极的配置与触控驱动电极或触控感应电极的具体结构无关，由施加在电极上的驱动信号确定。
在一些实施例中，参照图3所示，第一触控电极16与第一电极11同层设置。
即，第一触控电极16与第一电极11通过同一次构图工艺在同一层电极材料上制作形成。若使第一触控电极16与第一电极11异层设置，则需要通过两次构图工艺分别制作第一触控电极16与第一电极11。因此，使第一触控电极16与第一电极11同层设置可以节省一次构图工艺，进而简化制造上述实施例提供的内嵌式透明触控显示面板的工艺流程。
在一些实施例中，参照图3所示，第二触控电极17与第二电极15同层设置。同样，通过使第二触控电极17与第二电极15同层设置可以简化制造上述实施例提供的内嵌式透明触控显示面板的工艺流程。
在本公开的实施中，挡墙可处于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，以将相邻的第二电极隔离或者相邻的第二电极和第二触控电极隔离。挡墙在与透明基板垂直的竖直方向上的厚度大于第二电极和第二触控电极中的每一个的厚度。
进一步的，参照图6、7所示，其中图7为沿图6所示A-A’截线的截面图。沿与挡墙13轴向垂直的方向，挡墙13的截面为第一底边a大于第二底边b的梯形，挡墙通过第二底边b与像素定义结构相接触。
即，在该实施例中，挡墙的横截面为上底边大于下底边的梯形，通过使挡墙横截面为上底边大于下底边的梯形，可以实现在同层设置第二触控电极和第二电极的情况下，直接在电致发光层上蒸镀电极材料膜层，并通过挡墙将相邻的第二电极、相邻的触控感应电极和第二电极隔离开来，从而通过一次蒸镀即可制造出上述实施例中的第二电极和第二触控电极结构，因此，本公开实施例可以进一步简化上述内嵌式透明触控显示面板的制造工艺。
在一些实施例中，上述实施例中的挡墙由负性光刻胶材料制作形成。替代性地，在其它实施例中，挡墙可由树脂材料形成，并与所述像素定义结构形成为一体。
进一步的，参照图8、9所示，内嵌式透明触控显示面板还包括设置于与触控电极区域102相邻的像素区域101内的块状电极18，块状电极18与第二电极15同层设置。
在实施例中，块状电极18独立于第二电极15，并且块状电极在所 述透明基板上的正投影与第一触控电极16重叠。块状电极18与第二电极15以及第二触控电极17之间可以是绝缘的，例如，可以使用形成挡墙的材料(例如，树脂)将它们隔离，块状电极18仅与电致发光层接触，所以块状电极18处于浮接(英文名称：floating)状态。此外，块状电极在透明基板上的正投影与第一触控电极16重叠意味着块状电极18与第一触控电极16正对，所以块状电极18与第一触控电极16形成平板电容器，进而利用平板电容器的自举原理，将触控驱动过程中施加在第一触控电极16上的触控驱动信号(图9中以带箭头虚线表示)耦合至与块状电极18相邻的第二触控电极17，进一步实现触控驱动信号的释放。
在一些实施例中，参照图10所示，第二触控电极17包括与第一触控电极16交叠的交叠部分，交叠部分沿第一方向的长度d小于第二触控电极的其它部分沿所述第一方向的长度c。
通过使第一长度c大于第二长度d，可以减小第一触控电极与第二触控电极之间的正对面积，进而减小第一触控与第二触控电极形成平板电容器的正对面积，减小触控驱动电极与触控感应电极的寄生耦合电容，从而提升触控信号的强度和灵敏度。此外，当第二触控电极与第二电极同层设置时，上述设计还可以有利于增加第二电极的总体表面积，进而保证第二电极的压降(英文名称：IR Drop)。
在一些实施例中，上述实施例中的内嵌式透明触控显示面板还包括：设置于第一电极11和第二电极15的交叠区域且位于第一电极11上的银材料层。
参照图5所示，第一电极11和第二电极15的交叠区域51对应于本公开实施例提供内嵌式透明触控显示面板的显示区域，本公开实施例进一步在该区域设置位于第一电极11上的银材料层，因此可以通过银材料降低显示区域的透光率，进而提显示效果。
在一些实施例中，本公开实施例提供的内嵌式透明触控显示面板还可以包括：保护层，保护层覆盖于银材料层上。通过设置于银材料上的保护层可以对银材料进行保护，进而提升内嵌式透明触控显示面板的可靠性。
本公开再一实施例提供一种内嵌式透明触控显示面板的制造方法，该内嵌式透明触控显示面板的制造方法可用于制作上述任一实施 例提供的内嵌式透明触控显示面板。具体的，参照图11所示，该方法包括：
S11、在透明基板上形成多个第一电极和像素定义结构。
第一电极沿第一方向延伸，像素定义结构在透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域。
S12、在像素区域内形成有机电致发光层。
具体的，可以通过蒸镀有机电致发光材料在像素区域和触控电极区域形成有机电致发光层。当然，也可以在蒸镀过程对触控电极区域进行遮挡，从而仅在像素区域形成有机电致发光层。
S13、在像素区域的有机电致发光层上形成第二电极，第二电极沿第二方向延伸。
S14、形成多个沿第一方向延伸的第一触控电极以及在触控电极区域形成多个第二触控电极。第二触控电极沿第二方向延伸。第一电极、第二电极、第一触控电极、第二触控电极均采用透明材料制作，第一方向与第二方向相交。
通过本公开实施例提供的内嵌式透明触控显示面板制造方法获得的内嵌式透明触控显示面板可包括如下结构：透明基板上的多个沿第一方向延伸的第一电极和像素定义结构，像素定义结构在透明基板上定义出像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域，设置于像素区域的有机电致发光层、设置于有机电致发光层上且位于像素区域的第二电极，第一方向与第二方向相交，因此第一电极和第二电极具有交叠区域，进而可以通过驱动交叠区域的有机电致发光层进行发光并进行显示。此外，内嵌式透明触控显示面板还包括：多个沿第一方向延伸的第一触控电极和位于触控电极区域且沿第二方向延伸的第二触控电极，因此，第一触控电极和第二触控电极能够实现显示面板的触控感应；进一步的，第一电极、第二电极、第一触控电极、第二触控电极均采用透明电极材料制作，因此在第一电极和第二电极的交叠区域以外的其他区域均可以作为透光区域，即，本公开实施例提供的显示面板可以作为透明显示面板。综上，本公开实施例可以将内嵌式触控技术整合于透明OLED显示面板中。
在一些实施例中，第一电极与第一触控电极通过同一次构图工艺 制作形成。
具体的，一次构图工艺通常包括曝光、显影、刻蚀、剥离等工序，本公开对此不做限定。通过使第一电极与第一触控电极通过同一次构图工艺制作形成可以减少内嵌式透明触控显示面板的构图工艺次数，进而简化内嵌式透明触控显示面板的制造工艺。
在一些实施例中，在第一电极上形成像素定义结构的步骤可包括：沿所述第二方向形成多个彼此独立的树脂条。树脂条可以与电致发光层处于同一层。进一步地，内嵌式透明触控显示面板的制造方法还可：在每个树脂条上沿第二方向形成挡墙，挡墙处于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，所述挡墙用于隔离相邻的第二电极，或用于隔离相邻的第二电极和第二触控电极。
在一些实施例中，上述实施例中的形成挡墙的步骤可以通过如下步骤实现：
S121、在形成有像素定义结构的透明基板上形成负性光刻胶膜层。
S122、在负性光刻胶膜层上方设置掩膜板并对像素定义结构对应区域以外的其他区域的负性光刻胶进行曝光。
S123、对曝光后的负性光刻胶膜层进行显影形成挡墙。
由于在曝光过程中光线会发生一定程度的散射，所以通过上述步骤获得的挡墙的横截面为上底边大于下底边的梯形。
在一些实施例中，上述实施例中的在像素区域内制作第二电极的步骤以及在触控电极区域制作第二触控电极的步骤具体可以为：
在形成有挡墙的透明基板上蒸镀电极材料膜层形成多个第二电极和多个第二触控电极。
由于挡墙在垂直于透明基板方向的横截面为上底边大于下底边的梯形，所以在蒸镀过程中挡墙能够自动将相邻的第二电极以及相邻的第二电极和第二触控电极隔离开，形成第二触控电极和第二电极。上述实施例中通过一次蒸镀工艺即可形成第二触控电极和第二电极，省略了制作第二触控电极和第二电极的构图工艺，因此本公开实施例可以简化内嵌式透明触控显示面板的制造工艺。
在一些实施例中，方法还包括：在形成多个第二电极和多个第二触控电极的同时，在与触控电极区域相邻的像素区域内形成块状电极。即，在形成有挡墙的透明基板上蒸镀电极材料膜层形成第二电极、第 二触控电极以及块状电极。
在一些实施例中，方法还包括：在第一电极与第二电极的交叠区域制作银材料层。
第一电极和第二电极的交叠区域为本公开实施例提供内嵌式透明触控显示面板的显示区域，本公开实施例在该区域设置覆盖第一电极的银材料层，因此可以通过银材料降低显示区域的透光率，进而提显示效果。
示例性的，方法还包括：制作覆盖银材料层的保护层。通过设置于银材料上的保护层可以对银材料进行保护，进而提升内嵌式透明触控显示面板的可靠性。
本公开实施例提供一种内嵌式透明触控显示面板的驱动方法，该内嵌式透明触控显示面板的驱动方法用于驱动上述任一实施例提供的内嵌式透明触控显示面板，该方法包括如下步骤：
在触控显示过程中，将一帧时间划分为显示阶段和触控阶段；
在显示阶段向阳极电极输入阳极驱动信号、向阴极电极输入阴极驱动信号；
在触控阶段向触控驱动电极输入触控驱动信号。
具体的，参照图12所示，图12为内嵌式透明触控显示面板的阳极、触驱动应电极以及触控感应电极的电压的波形图。在触控阶段，同步信号高电平，内嵌式透明触控显示面板的阳极输入接地电压值，触控驱动电极依次输入脉冲的触控驱动信号，触控感应电极感应输入触控驱动电极的触控驱动信号形成脉冲电压信号并通过检测触控感应电极上的脉冲电压信号感应判断是否具有触控操作以及触控操作发生的位置。在显示阶段，同步信号低电平，内嵌式透明触控显示面板的阳极输入灰阶电压值，阴极均输入相同的直流电压，触控驱动电极和触控感应电极均浮接，内嵌式透明触控显示面板通过控制阳极和阴极输入电压实现有机电致发光层发光，进而进行显示。上述实施例中通过分时驱动的方式使得内嵌式透明触控显示面板显示驱动和触控驱动分开，进而避免可触控驱动信号和显示驱动信号之间的相互干扰。
还需要说明的是，上述任一实施例提供的内嵌式透明触控显示面板的阳极、阴极、触控驱动电极以及触控感应电极之间均绝缘设置，所以，在本公开的可能的实施例中，也可以同时进行显示驱动和触控 驱动。。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (24)

  1. 一种内嵌式透明触控显示面板，包括：
    透明基板上的多个第一电极，所述第一电极沿第一方向延伸；
    第一电极上的像素定义结构，所述像素定义结构在所述透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域；
    设置于所述像素区域的有机电致发光层、设置于所述有机电致发光层上且位于所述像素区域的第二电极，所述第二电极沿第二方向延伸；
    多个沿第一方向延伸的第一触控电极和位于所述触控电极区域且沿第二方向延伸的第二触控电极；
    其中所述第一电极、所述第二电极、所述第一触控电极、所述第二触控电极均为透明电极，所述第一方向与所述第二方向相交。
  2. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述第一电极和第二电极中的一个为阳极，另一个为阴极，所述第一触控电极和第二触控电极中的一个为触控驱动电极，另一个为触控感应电极。
  3. 根据权利要求1所述的内嵌式透明触控显示面板，其中所述像素定义结构包括多个树脂条，每个树脂条沿所述第二方向延伸。
  4. 根据权利要求3所述的内嵌式透明触控显示面板，还包括在每个树脂条上沿第二方向延伸的挡墙，所述挡墙处于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，以将相邻的第二电极隔离或者相邻的第二电极和第二触控电极隔离。
  5. 根据权利要求4所述的内嵌式透明触控显示面板，其中所述挡墙在与所述透明基板垂直的竖直方向上的厚度大于第二电极和第二触控电极中的每一个的厚度。
  6. 根据权利要求4所述的内嵌式透明触控显示面板，其中，沿与所述挡墙轴向垂直的方向，所述挡墙的截面为第一底边大于第二底边的梯形，所述挡墙通过所述第二底边与所述像素定义结构相接触。
  7. 根据权利要求6所述的内嵌式透明触控显示面板，其中，所述挡墙由负性光刻胶材料制作形成。
  8. 根据权利要求6所述的内嵌式透明触控显示面板，其中所述挡墙由树脂材料形成，并与所述像素定义结构形成为一体。
  9. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述第一触控电极与所述第一电极同层设置。
  10. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述第二触控电极与所述第二电极同层设置。
  11. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述内嵌式透明触控显示面板还包括设置于与触控电极区域相邻的像素区域内的块状电极，所述块状电极与所述第二电极同层设置。
  12. 根据权利要求11所述的内嵌式透明触控显示面板，其中所述块状电极独立于所述第二电极，并且所述块状电极在所述透明基板上的正投影与第一触控电极重叠。
  13. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述第二触控电极包括与所述第一触控电极交叠的交叠部分，所述交叠部分沿所述第一方向的长度小于所述第二触控电极的其它部分沿所述第一方向的长度。
  14. 根据权利要求1所述的内嵌式透明触控显示面板，其中，所述内嵌式透明触控显示面板还包括：设置于所述第一电极和所述第二电极的交叠区域且位于所述第一电极上的银材料层。
  15. 根据权利要求14所述的内嵌式透明触控显示面板，其中，所述内嵌式透明触控显示面板还包括覆盖于所述银材料层上的保护层。
  16. 一种内嵌式透明触控显示面板的制造方法，包括：
    在透明基板上形成多个第一电极和像素定义结构，所述第一电极沿第一方向延伸，所述像素定义结构在所述透明基板上定义出多个像素区域和多个触控电极区域，相邻触控电极区域之间包括至少一个像素区域；
    在像素区域内形成有机电致发光层；
    在所述像素区域的有机电致发光层上形成第二电极，所述第二电极沿第二方向延伸；
    形成多个沿第一方向延伸的第一触控电极以及在所述触控电极区域形成多个第二触控电极，所述第二触控电极沿第二方向延伸；
    其中所述第一电极、所述第二电极、所述第一触控电极、所述第 二触控电极均采用透明材料制作，所述第一方向与所述第二方向相交。
  17. 根据权利要求16所述的方法，其中，所述第一电极与所述第一触控电极通过同一次构图工艺制作形成。
  18. 根据权利要求16所述的方法，其中在第一电极上形成像素定义结构包括：沿所述第二方向形成多个彼此独立的树脂条。
  19. 根据权利要求18所述的方法，其中，所述方法还包括：
    在形成有像素定义结构的透明基板上形成负性光刻胶膜层；
    在所述负性光刻胶膜层上方设置掩膜板并对所述像素定义结构对应区域以外的其他区域的负性光刻胶进行曝光；
    对曝光后的负性光刻胶膜层进行显影形成所述挡墙，所述挡墙处于相邻的第二电极之间、以及相邻的第二电极和第二触控电极之间，以将相邻的第二电极隔离或者相邻的第二电极和第二触控电极隔离。
  20. 根据权利要求19所述的方法，其中，所述在所述像素区域的有机电致发光层上形成多个第二电极以及所述在所述触控电极区域形成多个第二触控电极，包括：
    在形成有挡墙的透明基板上蒸镀电极材料膜层形成多个所述第二电极和多个所述第二触控电极。
  21. 根据权利要求20所述的方法，其中，所述方法还包括：
    在形成多个所述第二电极和多个所述第二触控电极的同时，在与触控电极区域相邻的像素区域内形成块状电极。
  22. 根据权利要求16所述的方法，其中，所述方法还包括：在所述第一电极与所述第二电极的交叠区域制作银材料层。
  23. 根据权利要求22所述的方法，其中，所述方法还包括：制作覆盖所述银材料层的保护层。
  24. 一种用于驱动权利要求2-15任一项所述的内嵌式透明触控显示面板的方法，其中，该方法包括：在触控显示过程中，将一帧时间划分为显示阶段和触控阶段；在显示阶段向所述阳极电极输入显示阳极驱动信号、向所述阴极电极输入显示阴极驱动信号；在触控阶段向触控驱动电极输出触控驱动信号。
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