WO2018126871A1 - 电致发光显示面板、制作方法、驱动方法及显示装置 - Google Patents

电致发光显示面板、制作方法、驱动方法及显示装置 Download PDF

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Publication number
WO2018126871A1
WO2018126871A1 PCT/CN2017/116349 CN2017116349W WO2018126871A1 WO 2018126871 A1 WO2018126871 A1 WO 2018126871A1 CN 2017116349 W CN2017116349 W CN 2017116349W WO 2018126871 A1 WO2018126871 A1 WO 2018126871A1
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Prior art keywords
display panel
sub
electrode
wire grid
metal
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PCT/CN2017/116349
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English (en)
French (fr)
Inventor
王海生
董学
刘英明
丁小梁
吴俊纬
许睿
Original Assignee
京东方科技集团股份有限公司
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Priority to US16/078,606 priority Critical patent/US11068090B2/en
Publication of WO2018126871A1 publication Critical patent/WO2018126871A1/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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
    • G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/121—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G02B5/3083—Birefringent or phase retarding elements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/805—Electrodes
    • H10K50/82—Cathodes
    • H10K50/822—Cathodes characterised by their shape
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/1201—Manufacture or treatment
    • 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
    • H10K59/80521—Cathodes characterised by their shape
    • 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
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present application relates to the field of display, and in particular to an electroluminescent display panel, a manufacturing method, a driving method, and a display device.
  • AMOLED Active-matrix organic light emitting diode
  • the AMOLED display panel includes a driving back plate 11 , a light emitting layer 12 , a cathode layer 13 , a packaging film 14 , a touch screen 15 , a first double-sided tape 16 , and a circular polarizer 17 , which are sequentially disposed on the substrate 10 .
  • the touch screen 15 is generally provided with a touch driving electrode and a touch sensing electrode.
  • the touch screen 15 is usually separately disposed above the light emitting unit (including the driving back panel 11, the light emitting layer 12, and the cathode layer 13), and then disposed above the touch screen 15.
  • a circular polarizer for reducing external light reflection and enhancing contrast Obviously, the AMOLED display panel of this structure has problems such as a thick overall structure, poor flexibility, and low potential brightness.
  • the present application provides an electroluminescent display panel, a manufacturing method, a driving method, and a display device.
  • the present application provides an electroluminescent display panel.
  • the electroluminescent display panel includes: a light emitting unit, a quarter wave plate disposed on the light emitting unit, and a wire grid polarizer disposed on a side of the quarter wave plate opposite to the light emitting unit.
  • the light emitting unit includes a driving back plate, a light emitting layer, and an electrode layer.
  • the electrode layer includes a plurality of sub-electrodes extending in the first direction and insulated from each other, wherein the sub-electrodes transmit the electrode signals during the display phase of the display panel and transmit the touch driving signals during the touch phase of the display panel.
  • the wire grid polarizer includes a plurality of metal lines extending along the second direction, at least some of the metal lines forming the touch sensing electrodes and transmitting the touch sensing signals during the touch phase of the display panel.
  • the second direction intersects the first direction.
  • the electrode layer includes a cathode layer or an anode layer.
  • the driving backplane typically includes a TFT array and another electrode, that is, another electrode having opposite polarity and cooperating with the electrode layers described above.
  • another electrode and the TFT array are collectively referred to as a driving back plate.
  • the plurality of metal lines constitute a touch sensing electrode, and each of the touch sensing electrodes includes a plurality of adjacent metal lines.
  • the luminescent layer further comprises a plurality of sub-pixel units distributed in an array.
  • An orthographic projection of one or more of the plurality of metal lines on the luminescent layer coincides with an orthographic projection of a gap between sub-pixel units of adjacent rows or adjacent columns on the luminescent layer, and thus A sub-sensing electrode is formed, wherein a plurality of adjacent sub-sensing electrodes form a touch sensing electrode.
  • the expression "orthoprojection on the luminescent layer” refers to a projection along a direction perpendicular to the luminescent layer.
  • metal connection lines are further disposed between the one or more metal lines constituting each of the sub-sensing electrodes, and such metal connection lines and a corresponding one of the plurality of metal lines constitute a grid-like structure.
  • the lighting unit further comprises an insulating retaining wall on the lighting layer.
  • an insulating retaining wall is further disposed between sub-pixel units of adjacent rows or adjacent columns and is used to divide the electrode layer into a plurality of sub-electrodes.
  • a package film is further disposed between the light emitting unit and the quarter wave plate.
  • the electroluminescent display panel further includes a substrate disposed on a side of the light emitting unit opposite to the quarter wave plate, and the wire grid polarizer further includes a wire grid polarizer substrate, wherein the line The gate polarizer substrate is made of the same material as the base substrate.
  • the above electroluminescent display panel comprises a quantum dot light emitting display panel or an OLED display panel, in particular, an AMOLED display panel.
  • the present application further provides a display device comprising the electroluminescent display panel according to any of the above embodiments.
  • the present application also provides a method of fabricating an electroluminescent display panel.
  • the manufacturing method includes: sequentially forming a light emitting layer and an electrode layer on the driving back plate, wherein the electrode layer includes a plurality of sub-electrodes extending in the first direction and insulated from each other; and sequentially forming a quarter wave on the electrode layer A sheet and wire grid polarizer, wherein the wire grid polarizer includes a plurality of metal lines extending in a second direction, and the second direction intersects the first direction.
  • the luminescent layer further comprises a plurality of sub-pixel units distributed in an array.
  • the above manufacturing method further includes: forming an insulating retaining wall on the light emitting layer before forming the electrode layer, wherein the insulating retaining wall is located between the sub-pixel units of adjacent rows or adjacent columns.
  • the step of forming the electrode layer includes depositing an electrode metal film, and patterning the electrode metal film to form a plurality of sub-electrodes, wherein the plurality of sub-electrodes are separated by an insulating retaining wall.
  • the above manufacturing method further includes: forming a package film on the electrode layer before forming the quarter wave plate.
  • the step of forming a wire grid polarizer on the electrode layer specifically comprises: forming a metal connection line between a portion of the metal lines of the wire grid polarizer, wherein the metal connection line and the partial metal line form a grid-like structure.
  • the present application also provides a driving method for the above electroluminescent display panel.
  • the driving method includes: loading a display signal to a sub-electrode of the electrode layer during a display phase; and loading a touch driving signal to the sub-electrode of the electrode layer during the touch phase, and detecting through at least part of the metal line of the wire grid polarizer Touch sensing signal.
  • the display signals applied to the respective sub-electrodes of the electrode layer are the same in order to ensure uniformity of display.
  • the luminescent layer of the electroluminescent display panel further comprises a plurality of sub-pixel units distributed in an array.
  • the touch sensing signal is detected by a metal line corresponding to a gap between adjacent sub-pixel units of adjacent rows or adjacent columns.
  • FIG. 1 is a schematic structural view of a conventional AMILED display panel
  • FIG. 2 illustrates a schematic structural view of an OLED display panel according to an embodiment of the present application
  • FIG. 3 illustrates a schematic structural view of an OLED display panel according to another embodiment of the present application
  • FIG. 4 illustrates a schematic structural view of a wire grid polarizer in accordance with one embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a wire grid polarizer according to an embodiment of the present application, wherein all the metal lines of the wire grid polarizer constitute a touch sensing electrode;
  • FIG. 6 is a schematic structural diagram of a wire grid polarizer according to an embodiment of the present application, wherein a part of the metal lines of the wire grid polarizer constitute a touch sensing electrode;
  • FIG. 7 is a schematic structural diagram of a wire grid polarizer according to another embodiment of the present application, wherein a part of the metal lines of the wire grid polarizer constitute a touch sensing electrode;
  • FIG. 8 is a schematic structural view of a display panel according to an embodiment of the present application, wherein a retaining wall is further disposed on the cathode layer;
  • FIG. 9 is a schematic structural view showing a manner of arrangement of metal wires for a cathode sub-electrode and a wire grid polarizer, according to an embodiment of the present application.
  • FIG. 10 is a schematic structural view showing a manner of arrangement of metal wires for a cathode sub-electrode and a wire grid polarizer according to another embodiment of the present application;
  • FIG. 11 illustrates a fabrication flow diagram of an OLED display panel in accordance with an embodiment of the present application
  • FIG. 12 illustrates a flow chart of fabricating an OLED display panel according to another embodiment of the present application.
  • FIG. 13 illustrates a timing diagram of a display panel in accordance with one embodiment of the present application.
  • Embodiments of the present application provide an electroluminescent display panel, in particular, an OLED display panel. 2-6, the display panel includes: a light emitting unit 20, and a quarter wave plate 30 and a wire grid polarizer 40 sequentially disposed on the light emitting unit 20.
  • the light emitting unit 20 includes a driving back plate 21, a light emitting layer 22, and an electrode layer, here specifically, a cathode layer 23, wherein the cathode layer 23 includes a plurality of cathode sub-electrodes 231 extending in the first direction and insulated from each other.
  • Such a cathode sub-electrode 231 transmits a cathode signal during a display phase of the display panel and transmits a touch drive signal during a touch phase of the display panel.
  • the wire grid polarizer 40 includes a plurality of metal wires 401 extending in a second direction, wherein at least a portion of the metal wires 401 constitute the touch sensing electrodes 42 , and such touch sensing electrodes 42 are transmitted during the touch phase of the display panel Touch sensing signal.
  • the second direction intersects the first direction.
  • the drive backplane can be an LTPS driven backplane.
  • the display panel further includes a substrate substrate 50 disposed under the driving backplane, as shown in FIG.
  • the base substrate 50 may specifically be a flexible substrate substrate.
  • the base substrate 50 may specifically be a PET substrate.
  • a package film 60 may be disposed between the light emitting unit 20 and the quarter wave plate 30.
  • a protective film 70 may also be disposed over the wire grid polarizer 40. Such a protective film 70 can be bonded to the wire grid polarizer 40 by a transparent double-sided tape 80 (for example, OCA glue).
  • metal line 401 is typically formed by stamping on wire grid polarizer substrate 402 of wire grid polarizer 40.
  • the wire grid polarizer substrate 402 may specifically be a glass or film, preferably a PET substrate of the same material as the substrate of the OLED display panel.
  • the metal lines 401 are arranged in parallel at equal intervals on the wire grid polarizer substrate 402, wherein the metal lines 401 periodically change in the X-axis direction and are parallel to the Y-axis direction.
  • the line width of the metal line 401 is on the order of nanometers.
  • any of the metal lines has a first first line side A1 and a second line side A2, and the first line side A1 of any metal line and the first line side of the adjacent metal line
  • the shortest pitch d of the line side A1 is 100 to 200 nm.
  • the line width of any of the metal lines is 75 nm, and the gap between adjacent metal lines is 75 nm.
  • the transverse electric field wave (Transverse Electric, TE wave) has an electric field vector direction along the Y-axis direction and is parallel to the metal line. In this direction, the electrons in the electric field drive metal line oscillate along the length of the metal line.
  • the wire grid polarizer 40 can transmit TM light and attenuate the TE light, thereby having a polarization effect.
  • part of the metal lines or all of the metal lines in the wire grid polarizer 40 can transmit the touch sensing signals during the touch phase of the display panel. That is, part or all of the metal lines 401 of the wire grid polarizer 40 may be reused as the touch sensing electrodes 42. Regarding the case where a part of the metal wires or all of the metal wires in the wire grid polarizer 40 is used as the sensing electrode, the following detailed description will be respectively made.
  • all of the metal lines 401 of the wire grid polarizer 40 may constitute a plurality of touch sensing electrodes 42.
  • each of the touch sensing electrodes 42 includes a plurality of adjacent metal wires 401.
  • each of the touch sensing electrodes 42 includes the same number of metal wires 401.
  • the number of metal wires 401 included in each of the touch sensing electrodes 42 may not be equal.
  • the wire grid polarizer 40 by selecting all the metal lines of the wire grid polarizer 40 to be used as the touch sensing electrodes, the wire grid polarizer 40 can be made to have touch without changing the structure of the wire grid polarizer 40.
  • the function of the sensing electrode Thereby, the manufacturing process of the display panel can be simplified, and the production efficiency of the display panel can be improved.
  • the number of metal lines constituting each touch sensing electrode 42 is smaller than the total number of metal lines of the wire grid polarizer.
  • a part of the metal wires of the wire grid polarizer 40 may constitute a plurality of touch sensing electrodes.
  • the metal lines constituting the touch sensing electrodes may correspond to the gaps between the sub-pixel unit rows or the sub-pixel unit columns.
  • an illuminating layer of an OLED display panel typically includes a plurality of pixel units, and each pixel unit generally includes a plurality of pixel units.
  • each pixel unit includes a red sub-pixel unit 001, a green sub-pixel unit 002, and a blue sub-pixel unit 003, wherein adjacent sub-pixel units have a gap 004 therebetween.
  • the plurality of sub-pixel units form a sub-pixel unit row and a sub-pixel unit column in the light-emitting layer 22 of the display panel.
  • a metal line corresponding to the gap 004 between the sub-pixel unit row or the sub-pixel unit column is used as one sub-sensing electrode 41. That is, the positive projection of the metal line included in each sub-sense electrode 41 on the substrate of the display panel, the gap between the sub-pixel unit rows or the sub-pixel unit columns is positive on the substrate of the display panel. Within the projection. Optionally, the two orthographic projections completely coincide. Further, the adjacent plurality of sub-sense electrodes 41 constitute a touch sensing electrode 42.
  • the number of sub-sensing electrodes 41 of each touch sensing electrode 42 may be equal.
  • the manufacturing process of the display panel can be simplified, and the manufacturing efficiency of the display surface can be improved.
  • the number of sub-sensing electrodes 41 of each touch sensing electrode 42 may also be unequal. It should be noted that, in FIG. 6, only one arrangement of the row of sub-pixel units and the metal lines for the cathode sub-electrodes and the wire grid polarizers is schematically illustrated. It should be understood that the pixel unit of the light emitting layer is located below the cathode layer and the wire grid polarizer, and the light emitting layer has a plurality of rows and columns of sub-pixel units.
  • a metal connection line 403 is further disposed between the metal lines 401 of each of the sub-sensing electrodes 41 , and the metal lines 401 and the metal connection lines 403 of the sub-sensing electrodes 41 form a grid structure.
  • a metal line corresponding to a gap between a sub-pixel unit row or a sub-pixel unit column is selected for transmitting a touch sensing signal, and a metal connecting line is disposed between the metal lines, thereby making a metal The wire and the metal connecting wire form a grid structure. Thereby, the resistance of the touch sensing electrode can be reduced without affecting the polarization function of the wire grid polarizer.
  • the split insulation can be realized by the insulating retaining wall 005.
  • the insulating retaining wall 005 may be formed above the light emitting layer 22 and at a position corresponding to the gap of the pixel unit row or the pixel unit column. After that, a cathode film is formed over the display panel provided with the insulating retaining wall 005.
  • the cathode layer 23 can be divided into a plurality of mutually insulated cathode sub-electrodes 231.
  • an insulating retaining wall is formed in a region corresponding to a gap between a pixel unit row or a pixel unit column, and a plurality of insulating retaining walls are arranged in the same direction.
  • the division of the cathode layer can be achieved without affecting the normal display of the display panel, and the insulating retaining wall thus formed has no corners, is simple to fabricate, and has good insulation properties.
  • the metal wires of the wire grid polarizer Arrange the direction. That is, it is necessary to presuppose that a metal wire as a sensing electrode and a cathode sub-electrode as a driving electrode cross each other to form a capacitance.
  • the metal lines and the cathode sub-electrodes are perpendicular to each other. That is, for example, the metal lines 401 of the wire grid polarizer are arranged in the row direction, and the insulating retaining walls 232 are formed at the gaps between the pixel unit columns, so that the cathode sub-electrodes 231 are arranged in the column direction, as shown in the figure. 9 is shown. If the metal lines 401 of the wire grid polarizers are arranged in the column direction, an insulating retaining wall 232 is formed at the gap between the rows of pixel cells so that the cathode sub-electrodes 231 are arranged in the row direction, as shown in FIG. .
  • FIG. 9 and FIG. 10 are only a schematic illustration of the case where all the metal wires of the wire grid polarizer are used as the touch sensing electrodes.
  • the arrangement of the metal wire and the cathode sub-electrode of the wire grid polarizer is also applicable to the case where a part of the metal wire of the wire grid polarizer is used as the touch sensing electrode, and will not be described herein.
  • the display panel comprises an AMOLED display panel.
  • Embodiments of the present application also provide a display device.
  • a display device includes an OLED display panel provided by any of the above embodiments of the present application.
  • an embodiment of the present application further provides a method for fabricating an electroluminescent display panel (specifically, an OLED display panel).
  • the manufacturing method includes the following steps: Step 101, sequentially forming a light-emitting layer and an electrode layer (as an example, a cathode layer) on a driving back plate, wherein the electrode layer includes a plurality of sub-electrodes extending in the first direction and insulated from each other (as an example, a plurality of cathode sub-electrodes); and in step 102, a quarter-wave plate and a wire grid polarizer are sequentially formed on the electrode layer, wherein the wire grid polarizer includes a plurality of metal lines extending in the second direction.
  • the manufacturing method may further include: forming a metal connection line between the partial metal lines of the wire grid polarizer, wherein the metal connection line and the part of the metal lines form a grid structure.
  • the grid-like structure formed by the metal connection lines and the partial metal lines corresponds to the gap between adjacent sub-pixel unit rows or adjacent sub-pixel unit columns.
  • an embodiment of the present application provides a specific manufacturing method for an OLED display panel.
  • the manufacturing method includes: step 201, forming a light-emitting layer on the driving backplane; and step 202, forming an insulating retaining wall on the light-emitting layer, wherein the insulating retaining wall is located between adjacent pixel unit rows or adjacent pixel unit columns; Depositing an electrode metal film (specifically, a cathode metal film), and forming a plurality of sub-electrodes (specifically, a plurality of cathode sub-electrodes) separated by an insulating retaining wall; and step 204, sequentially forming a quarter on the electrode layer Wave plate and wire grid polarizers.
  • a package film may be formed on the electrode layer before forming the quarter wave plate.
  • the embodiment of the present application further provides a driving method for the above electroluminescent display panel (specifically, an OLED display panel).
  • the driving method includes: loading a display signal to a sub-electrode of the electrode layer (exemplarily, a cathode sub-electrode of the cathode layer) during a display phase; and loading a touch driving signal to a sub-electrode of the electrode layer during a touch phase, and The touch sensing signal is detected by at least a portion of the metal lines of the wire grid polarizer.
  • the touch sensing signal is detected by a metal line corresponding to a gap between adjacent sub-pixel unit rows or adjacent sub-pixel unit columns of the light emitting layer.
  • FIG. 13 illustrates a timing diagram of a display panel in accordance with one embodiment of the present application.
  • VGLS, RSTV, RCX, and RCB indicate display pulse signals
  • MUX1, MUX2, MUX3, MUX4, MUX5, and MUX6 indicate switching signals of the multiplexer
  • EN1 and EN2 indicate touch and display synchronization signals.
  • EN1 is high and EN2 is low, the display panel is in the display phase.
  • EN1 is low and EN2 is high, the display panel is in the touch phase.
  • FIG. 13 is an example of a high level of 7 V and a low level of -7 V, but this should in no way be regarded as any limitation on the present application.
  • embodiments of the present application provide an electroluminescent display panel, in particular, an OLED display panel.
  • a quarter wave plate and a wire grid polarizer are sequentially disposed above the light emitting unit.
  • part or all of the metal lines of the wire grid polarizer can transmit the touch sensing signal during the touch phase of the display panel. That is, the polarizer of the display panel can not only have a polarization function but also can be reused as a touch sensing electrode.
  • the electrode layer of the electroluminescence display panel includes a plurality of sub-electrodes insulated from each other.
  • Such sub-electrodes can transmit electrode signals during the display phase of the display panel and can transmit the touch drive electrodes during the touch phase of the display panel. That is, the electrode of the electroluminescent display panel (as an example, the cathode) can be reused as a touch driving electrode. In this manner, the electroluminescent display panel can avoid the use of a separate touch screen, thereby reducing the thickness of the electroluminescent display panel and further improving the brightness and flexibility of the electroluminescent display panel.

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Abstract

一种电致发光显示面板、制作方法、驱动方法及显示装置。电致发光显示面板包括：发光单元（20）、设置于发光单元（20）上的四分之一波片（30）、以及设置在四分之一波片（30）与发光层（22）相反的一侧上的线栅偏振器（40）。发光单元（20）包括驱动背板（21）、发光层（22）和电极层（23）。电极层（23）包括沿第一方向延伸且相互绝缘的多个子电极（231），子电极（231）在显示面板的显示阶段传输电极信号且在显示面板的触控阶段传输触控驱动信号。线栅偏振器（40）包括沿第二方向延伸的多个金属线（401），其中至少一些金属线（401）构成触控感应电极并且在显示面板的触控阶段传输触控感应信号，第二方向与第一方向相交。

Description

电致发光显示面板、制作方法、驱动方法及显示装置
对相关申请的交叉引用
本申请要求于2017年1月4日提交的中国专利申请No.201710005636.9的优先权，该中国专利申请以其整体通过引用并入本文。
技术领域
本申请涉及显示领域，尤其涉及电致发光显示面板、制作方法、驱动方法及显示装置。
背景技术
目前的显示类型主要包括液晶显示(Liquid Crystal Display，LCD)、有机发光二极管显示(Organic Light-Emitting Diode，OLED)、等离子显示(Plasma Display Panel，PDP)和电子墨水显示等等。在OLED显示器当中，有源矩阵有机发光显示器(Active-matrix organic light emitting diode，AMOLED)为一种新型显示器件，其具有高色度、高对比度、宽视角、高亮度、自发光、响应速度快、可实现柔性显示等特点，并且已被公认为下一代平板显示的主流技术。
参照图1，示出了一种现有AMOLED显示面板的结构示意图。具体地，该AMOLED显示面板包括依次设置于衬底基板10上的驱动背板11、发光层12、阴极层13、封装薄膜14、触摸屏15、第一层双面胶16、圆偏光片17、第二层双面胶18和保护薄膜19。在这样的方案中，触控屏15一般还设置有触控驱动电极和触控感应电极。也就是说，在现有的AMOLED显示面板中，通常会在发光单元(包括驱动背板11、发光层12和阴极层13)上方单独设置触控屏15，并且然后在触控屏15上方设置用于降低外界光线反射以及增强对比度的圆偏光片。显然，这种结构的AMOLED显示面板存在整体结构较厚、柔性弯曲度较差、以及潜在地亮度较低等问题。
发明内容
本申请提供一种电致发光显示面板、制作方法、驱动方法及显示 装置。
根据第一方面，本申请提供一种电致发光显示面板。该电致发光显示面板包括：发光单元、设置于发光单元上的四分之一波片、以及设置在四分之一波片与发光单元相反的一侧上的线栅偏振器。具体地，发光单元包括驱动背板、发光层和电极层。电极层包括沿第一方向延伸且相互绝缘的多个子电极，其中子电极在显示面板的显示阶段传输电极信号并且在显示面板的触控阶段传输触控驱动信号。另外，线栅偏振器包括沿第二方向延伸的多个金属线，其中至少一些金属线构成触控感应电极并且在显示面板的触控阶段传输触控感应信号。此处，第二方向与第一方向相交。
需要指出的是，在本公开提供的电致发光显示面板中，具体地，电极层包括阴极层或者阳极层。此外，还需要指出的是，在上述电致发光显示面板中，驱动背板典型地包括TFT阵列和另一个电极，即，与以上所述的电极层极性相反且相互协作的另外的电极。此处，出于简单起见，在本申请中，将这样的另一电极与TFT阵列整体指代为驱动背板。
根据具体实施例，所述多个金属线构成触控感应电极，并且每一个触控感应电极包括若干个相邻的金属线。
根据具体实施例，发光层还包括呈阵列分布的多个子像素单元。所述多个金属线中的一个或多个在所述发光层上的正投影与相邻行或相邻列的子像素单元之间的间隙在所述发光层上的正投影重合，并且因此构成一个子感应电极，其中相邻的若干个子感应电极构成一个触控感应电极。此处，需要指出的是，表述“在所述发光层上的正投影”指的是沿着垂直于所述发光层的方向的投影。
根据具体实施例，构成每一个子感应电极的所述一个或多个金属线之间还设置有金属连接线，并且这样的金属连接线与相应的一个多个金属线构成网格状结构。
根据具体实施例，发光单元还包括位于发光层上的绝缘挡墙。这样的绝缘挡墙进一步设置于相邻行或相邻列的子像素单元之间，并且用于将电极层分割成多个子电极。
根据具体实施例，在以上提出的电致发光显示面板中，发光单元与四分之一波片之间还设置有封装薄膜。
根据具体实施例，上述电致发光显示面板还包括设置于发光单元与四分之一波片相反的一侧上的衬底基板，并且线栅偏振器还包括线栅偏振器衬底，其中线栅偏振器衬底与衬底基板的材质相同。
根据具体实施例，上述电致发光显示面板包括量子点发光显示面板或者OLED显示面板，具体地，AMOLED显示面板。
根据第二方面，本申请还提供一种显示装置，包括根据以上任一个实施例所述的电致发光显示面板。
根据第三方面，本申请还提供一种电致发光显示面板的制作方法。具体地，该制作方法包括：在驱动背板上依次形成发光层和电极层，其中电极层包括沿第一方向延伸且相互绝缘的多个子电极；以及在电极层上依次形成四分之一波片和线栅偏振器，其中线栅偏振器包括沿第二方向延伸的多个金属线，并且第二方向与第一方向相交。
根据具体实施例，发光层还包括呈阵列分布的多个子像素单元。此时，上述制作方法还包括：在形成电极层之前，在发光层上形成绝缘挡墙，其中绝缘挡墙位于相邻行或相邻列的子像素单元之间。进一步地，形成电极层的步骤包括：沉积电极金属薄膜，并且图案化电极金属薄膜以形成多个子电极，其中所述多个子电极通过绝缘挡墙而分离。
根据具体实施例，上述制作方法还包括：在形成四分之一波片之前，还在电极层上形成封装薄膜。
根据具体实施例，在电极层上形成线栅偏振器的步骤具体包括：在线栅偏振器的部分金属线之间形成金属连接线，其中金属连接线与这样的部分金属线构成网格状结构。
根据第四方面，本申请还提供一种用于上述电致发光显示面板的驱动方法。该驱动方法包括：在显示阶段，向电极层的子电极加载显示信号；以及在触控阶段，向电极层的子电极加载触控驱动信号，并且通过线栅偏振器的至少部分金属线来检测触控感应信号。此处，需要指出的是，在以上描述中，施加给电极层的各个子电极的显示信号是相同的，以便保证显示的均一性。
根据具体实施例，电致发光显示面板的发光层还包括呈阵列分布的多个子像素单元。此时，在所触控阶段，通过与相邻行或相邻列的子像素单元之间的间隙对应的金属线来检测触控感应信号。
附图说明
图1图示了一种现有AMILED显示面板的结构示意图；
图2图示了根据本申请的一个实施例的OLED显示面板的结构示意图；
图3图示了根据本申请的另一个实施例的OLED显示面板的结构示意图；
图4图示了根据本申请的一个实施例的线栅偏振器的结构示意图；
图5图示了根据本申请的一个实施例的线栅偏振器的结构示意图，其中该线栅偏振器的全部金属线构成触控感应电极；
图6图示了根据本申请的一个实施例的线栅偏振器的结构示意图，其中该线栅偏振器的部分金属线构成触控感应电极；
图7图示了根据本申请的另一个实施例的线栅偏振器的结构示意图，其中该线栅偏振器的部分金属线构成触控感应电极；
图8图示了根据本申请的一个实施例的显示面板的结构示意图，其中在阴极层上还设置有挡墙；
图9是根据本申请的一个实施例的示出了用于阴极子电极和线栅偏振器的金属线的设置方式的结构示意图；
图10是根据本申请的另一个实施例的示出了用于阴极子电极和线栅偏振器的金属线的设置方式的结构示意图；
图11图示了根据本申请的一个实施例的OLED显示面板的制作流程图；
图12图示了根据本申请的另一个实施例的OLED显示面板的制作流程图；以及
图13图示了根据本申请的一个实施例的显示面板的时序图。
具体实施方式
下面结合说明书附图对本申请的实施例的实现过程进行详细说明。需要注意的是，相同或类似的标号自始至终表示相同或类似的元件或者具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，并且不能理解为对本申请的限制。
本申请实施例提供一种电致发光显示面板，具体地，OLED显示面 板。参见图2-6所示，该显示面板包括：发光单元20，以及依次设置于发光单元20上的四分之一波片30和线栅偏振器40。发光单元20包括驱动背板21、发光层22以及电极层，此处具体地，阴极层23，其中阴极层23包括沿第一方向延伸且相互绝缘的多个阴极子电极231。这样的阴极子电极231在显示面板的显示阶段传输阴极信号并且在显示面板的触控阶段传输触控驱动信号。进一步地，线栅偏振器40包括沿第二方向延伸的多个金属线401，其中至少部分金属线401构成触控感应电极42，并且这样的触控感应电极42在显示面板的触控阶段传输触控感应信号。此处，第二方向与第一方向相交。在具体实施例中，驱动背板可以为LTPS驱动背板。可选地，显示面板还包括设置于驱动背板下方的衬底基板50，如图3所示。作为示例，衬底基板50具体可以为柔性衬底基板。例如，衬底基板50具体可以为PET衬底。另外，在发光单元20与四分之一波片30之间还可以设置有封装薄膜60。在线栅偏振器40之上还可以设置有保护薄膜70。这样的保护薄膜70可以通过透明双面胶80(例如，OCA胶)与线栅偏振器40进行贴合。
下面将参照图4来描述线栅偏振器40。如图4所示，通常采用压印的方式将金属线401制作在线栅偏振器40的线栅偏振器衬底402上。作为示例，线栅偏振器衬底402具体可以为玻璃或薄膜上，优选为与OLED显示面板的衬底基板材质相同的PET衬底。在这样的情况下，金属线401在线栅偏振器衬底402上平行等间距地排列，其中金属线401沿X轴方向周期性变化并且平行于Y轴方向。金属线401的线宽为纳米级。具体地，在垂直于金属线的延伸方向上，任一金属线均具有相对的第一线边A1和第二线边A2，并且任一金属线的第一线边A1和相邻金属线的第一线边A1的最短间距d为100～200nm。可选地，任一金属线的线宽为75nm，并且相邻金属线之间的间隙为75nm。横向电场波(Transverse Electric，TE波)的电场矢量方向沿Y轴方向并且平行于金属线。在这个方向上，电场驱动金属线中的电子沿着金属线长度方向振荡。由此，电子与金属晶格中的原子发生碰撞，使得TE波发生衰减，同时还会伴随着辐射。横向磁场波(Transverse Magnetic，TM波)的电场矢量在X-Z平面内垂直于金属线。由于电子在这个方向没有足够空间运动，因而不能够运动太远，从而减弱了衰减和辐射。这使得TM波可以穿过金属线而几乎不发生改变。基于 此，线栅偏振器40可以使TM光透过并且使TE光衰减，从而具有偏振效应。
在本申请的实施例中，线栅偏振器40中的部分金属线或全部金属线在显示面板的触控阶段可以传输触控感应信号。即，线栅偏振器40的部分或全部金属线401可以复用作触控感应电极42。关于线栅偏振器40中的部分金属线或全部金属线用作感应电极的情形，以下分别进行详细举例说明。
例如，如图5所示，线栅偏振器40的全部金属线401可以构成多个触控感应电极42。具体地，每一个触控感应电极42包括相邻的若干条金属线401。进一步可选地，每一个触控感应电极42所包括的金属线401的数量相等。当然，每一个触控感应电极42所包括的金属线401的数量也可以不相等。当每一个触控感应42所包括的金属线401的数量相等时，可以简化显示面板的制作工艺，并且提高显示面板的制作效率。在本申请的实施例中，通过选择线栅偏振器40的全部金属线以用作触控感应电极，可以在不改变线栅偏振器40的结构的基础上使线栅偏振器40具有触控感应电极的功能。由此，可以简化显示面板的制作过程，并且提高显示面板的制作效率。当然，应当理解的是，构成每一触控感应电极42的金属线的数量小于线栅偏振器的金属线的总数量。
又例如，如图6所示，还可以是线栅偏振器40的部分部金属线构成多个触控感应电极。这些构成触控感应电极的金属线可以对应于子像素单元行或子像素单元列之间的间隙。一般而言，OLED显示面板的发光层通常包括多个像素单元，而每个像素单元一般又包括多个像素单元。例如，每一个像素单元包括红色子像素单元001、绿色子像素单元002和蓝色子像素单元003，其中相邻的子像素单元之间具有间隙004。在这样的情况下，多个子像素单元在显示面板的发光层22形成子像素单元行和子像素单元列。在本申请的具体实施例中，可选地，与子像素单元行或子像素单元列之间的间隙004对应的金属线作为一个子感应电极41。即，每一个子感应电极41所包括的金属线在显示面板的衬底基板上的正投影，落于子像素单元行或子像素单元列之间的间隙在显示面板的衬底基板上的正投影之内。可选地，这两个正投影完全重合。进一步地，相邻的多个子感应电极41构成一个触控感应电 极42。在具体实施例中，可循地，每一个触控感应电极42的子感应电极41的数量可以相等。当每一个触控感应电极42的子感应电极41的数量相等时，可以简化显示面板的制作工艺，并且提高显示面的制作效率。当然，每一个触控感应电极42的子感应电极41的数量也可以不相等。需要说明的是，图6中，仅以一行子像素单元以及用于阴极子电极和线栅偏振器的金属线的一种设置方式进行示意说明。应当理解的是，发光层的像素单元位于阴极层和线栅偏振器的下方，并且发光层具有多行、多列的子像素单元。
可选地，如图7所示，在每一个子感应电极41的金属线401之间还设置有金属连接线403，并且子感应电极41的金属线401与金属连接线403构成网格状结构。在本申请的实施例中，选择与子像素单元行或子像素单元列之间的间隙对应的金属线用于传输触控感应信号，并且在该金属线之间设置金属连接线，从而使金属线和金属连接线形成网格状结构。由此，在不影响线栅偏振器的偏振功能的情况下，可以降低触控感应电极的电阻。
下面将参照图8来描述发光单元20的阴极层23。如图8所示，可以采用绝缘挡墙005实现分割绝缘。例如，在显示面板的制作过程中，可以在发光层22的上方并且在与像素单元行或像素单元列的间隙对应的地方形成绝缘挡墙005。在此之后，再在设置有绝缘挡墙005的显示面板的上方形成阴极薄膜。此时，由于具有绝缘挡墙005的区域和没有绝缘挡墙005的区域的高度不同，所以在上方沉积阴极薄膜时，可以将阴极层23分割成多个相互绝缘的阴极子电极231。在本申请的实施例中，在与像素单元行或像素单元列之间的间隙对应的区域形成绝缘挡墙，并且多个绝缘挡墙沿同一个方向排布。以此方式，在不影响显示面板的正常显示的情况下，可以实现对阴极层的分割，并且由此形成的绝缘挡墙没有拐角、制作简单且绝缘性能良好。另外，需要说明的是，不管是在像素单元行之间的间隙处形成绝缘挡墙，还是在像素单元列之间的间隙处形成绝缘挡墙，都需要同时考虑线栅偏振器的金属线的排列方向。即，需要以下列为前提条件：使作为感应电极的金属线与作为驱动电极的阴极子电极相互交叉，从而形成电容。可选地，金属线与阴极子电极相互垂直。即，例如，线栅偏振器的金属线401按照行方向进行排布，并且在像素单元列之间的间隙处形成绝缘挡 墙232，从而使阴极子电极231按列方向进行排布，如图9所示。如果线栅偏振器的金属线401按列方向进行排布，那么在像素单元行之间的间隙处形成绝缘挡墙232，以使阴极子电极231按照行方向进行排布，如图10所示。当然，对于线栅偏振器的金属线和阴极子电极的设置方式，图9和图10仅是以线栅偏振器的全部金属线用作触控感应电极的情况为例进行的示意说明。对于线栅偏振器的金属线和阴极子电极的设置方式，同样也适用于线栅偏振器的部分金属线用作触控感应电极的情况，并且在此不再赘述。
可选地，显示面板包括AMOLED显示面板。
本申请的实施例还提供一种显示装置。这样的显示装置包括本申请的任何上述实施例提供的OLED显示面板。
参见图11所示，本申请实施例还提供一种电致发光显示面板(具体地，OLED显示面板)的制作方法。该制作方法包括以下步骤：步骤101，在驱动背板上依次形成发光层和电极层(作为示例，阴极层)，其中电极层包括沿第一方向延伸且相互绝缘的多个子电极(作为示例，多个阴极子电极)；以及步骤102，在电极层上依次形成四分之一波片和线栅偏振器，其中线栅偏振器包括沿第二方向延伸的多个金属线。
可选地，上述制作方法还可以包括：在线栅偏振器的部分金属线之间形成金属连接线，其中金属连接线与所述部分金属线构成网格状结构。在这样的情况下，在最后形成的OLED显示面板中，由金属连接线与部分金属线形成的网格状结构与相邻子像素单元行或相邻子像素单元列之间的间隙对应。
参见图12所示，本申请的实施例提供一种用于OLED显示面板的具体制作方法。该制作方法包括：步骤201，在驱动背板上形成发光层；步骤202，在发光层上形成绝缘挡墙，其中绝缘挡墙位于相邻像素单元行或相邻像素单元列之间；步骤203，沉积电极金属薄膜(具体地，阴极金属薄膜)，并且形成通过绝缘挡墙分离的多个子电极(具体地，多个阴极子电极)；以及步骤204，在电极层上依次形成四分之一波片和线栅偏振器。
可选地，在形成四分之一波片之前，还可以在电极层上形成封装薄膜。
本申请实施例还提供一种用于上述电致发光显示面板(具体地， OLED显示面板)的驱动方法。该驱动方法包括：在显示阶段，向电极层的子电极(示例性地，阴极层的阴极子电极)加载显示信号；以及在触控阶段，向电极层的子电极加载触控驱动信号，并且通过线栅偏振器的至少部分金属线来检测触控感应信号。
可选地，在触控阶段，通过与发光层的相邻子像素单元行或相邻子像素单元列之间的间隙对应的金属线来检测触控感应信号。
图13图示了根据本申请的一个实施例的显示面板的一种时序图。在图13中，VGLS、RSTV、RCX、RCB表示显示脉冲信号，MUX1、MUX2、MUX3、MUX4、MUX5、MUX6表示多路选择器的开关信号，并且EN1与EN2表示触控与显示同步信号。当EN1为高电平并且EN2为低电平时，显示面板处于显示阶段。类似地，当EN1为低电平并且EN2为高电平时，显示面板处于触控阶段。需要说明的是，图13是以高电平为7V，低电平为-7V进行的举例说明，但是这绝不应当视为对本申请的任何限制。
综上所述，本申请的实施例提供了一种电致发光显示面板，具体地，OLED显示面板。在该显示面板中，发光单元上方依次设置有四分之一波片和线栅偏振器。具体地，线栅偏振器的部分或全部金属线可以在显示面板的触控阶段传输触控感应信号。即，显示面板的偏振器不仅可以具有偏振功能，而且还可以复用作触控感应电极。此外，电致发光显示面板的电极层包括相互绝缘的多个子电极。这样的子电极在显示面板的显示阶段可以传输电极信号并且在显示面板的触控阶段可以传输触控驱动电极。即，电致发光显示面板的电极(作为示例，阴极)可以复用作触控驱动电极。以这样的方式，电致发光显示面板可以避免使用独立的触控屏，从而降低了电致发光显示面板的厚度，并且进一步地提高了电致发光显示面板的亮度和柔性弯曲度。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (15)

  1. 一种电致发光显示面板，包括：
    发光单元；
    位于所述发光单元上的四分之一波片；以及
    位于所述四分之一波片与所述发光层相反的一侧上的线栅偏振器，其中，
    所述发光单元包括：驱动背板、发光层和电极层，其中，
    所述电极层包括沿第一方向延伸且相互绝缘的多个子电极，所述多个子电极被配置于在显示面板的显示阶段传输电极信号并且在显示面板的触控阶段传输触控驱动信号；
    所述线栅偏振器包括沿第二方向延伸的多个金属线，所述多个金属线中的至少一些构成触控感应电极并且被配置于在显示面板的触控阶段传输触控感应信号；以及
    所述第二方向与所述第一方向相交。
  2. 如权利要求1所述的电致发光显示面板，其中，
    所述多个金属线构成多个触控感应电极，并且每一个所述触控感应电极包括若干个相邻的金属线。
  3. 如权利要求1所述的电致发光显示面板，其中，
    所述发光层包括呈阵列分布的多个子像素单元；
    所述多个金属线中的一个或多个在所述发光层上的正投影与相邻行或相邻列的子像素单元之间的间隙在所述发光层上的正投影重合，从而构成一个子感应电极，并且
    相邻的若干个子感应电极构成一个触控感应电极。
  4. 如权利要求3所述的电致发光显示面板，其中，
    所述一个或多个金属线之间还设置有金属连接线，所述子感应电极的所述金属线与所述金属连接线构成网格状结构。
  5. 如权利要求3所述的电致发光显示面板，其中，
    所述发光单元还包括位于所述发光层上的绝缘挡墙，所述绝缘挡墙进一步设置在相邻行或相邻列的子像素单元之间并且将所述电极层分割成所述多个子电极。
  6. 如权利要求1所述的电致发光显示面板，还包括：设置在所述 发光单元与所述四分之一波片之间的封装薄膜。
  7. 如权利要求1所述的电致发光显示面板，还包括：设置在所述发光单元与所述四分之一波片相反的一侧上的衬底基板，其中，
    所述线栅偏振器还包括线栅偏振器衬底，所述线栅偏振器衬底与所述衬底基板的材质相同。
  8. 如权利要求1所述的电致发光显示面板，其中，所述显示面板包括AMOLED显示面板。
  9. 一种显示装置，包括：如权利要求1-8中任一项所述的电致发光显示面板。
  10. 一种电致发光显示面板的制作方法，包括：
    在驱动背板上依次形成发光层和电极层，所述电极层包括沿第一方向延伸且相互绝缘的多个子电极；以及
    在所述电极层上依次形成四分之一波片和线栅偏振器，所述线栅偏振器包括沿第二方向延伸的多个金属线，其中，
    所述第二方向与所述第一方向相交。
  11. 如权利要求10所述的电致发光显示面板的制作方法，其中，
    所述发光层包括呈阵列分布的多个子像素单元；
    所述制作方法还包括：
    在形成所述电极层之前，在所述发光层上形成绝缘挡墙，所述绝缘挡墙位于相邻行或相邻列的子像素单元之间；并且
    形成所述电极层的步骤包括：
    沉积电极金属薄膜，并且图案化所述电极金属薄膜以形成所述多个子电极，其中所述多个子电极通过所述绝缘挡墙而分离。
  12. 如权利要求10所述的电致发光显示面板的制作方法，还包括：
    在形成所述四分之一波片之前，在所述电极层之上形成封装薄膜。
  13. 如权利要求10所述的电致发光显示面板的制作方法，其中，
    形成所述线栅偏振器的步骤包括：
    在所述线栅偏振器的部分金属线之间形成金属连接线，所述金属连接线与所述部分金属线构成网格状结构。
  14. 一种如权利要求1所述的电致发光显示面板的驱动方法，包括：
    在显示阶段，向所述电极层的子电极加载显示信号；以及
    在触控阶段，向所述电极层的子电极加载触控驱动信号，并且通过所述线栅偏振器的至少部分金属线来检测触控感应信号。
  15. 如权利要求14所述的电致发光显示面板的驱动方法，其中，
    所述发光层包括呈阵列分布的多个子像素单元；并且
    在所述触控阶段，通过与相邻行或相邻列的子像素单元列之间的间隙对应的金属线来检测所述触控感应信号。
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