WO2025236372A1 - 显示面板和显示装置 - Google Patents

显示面板和显示装置

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Publication number
WO2025236372A1
WO2025236372A1 PCT/CN2024/103329 CN2024103329W WO2025236372A1 WO 2025236372 A1 WO2025236372 A1 WO 2025236372A1 CN 2024103329 W CN2024103329 W CN 2024103329W WO 2025236372 A1 WO2025236372 A1 WO 2025236372A1
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WO
WIPO (PCT)
Prior art keywords
layer
sub
pixel
light
display panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/103329
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English (en)
French (fr)
Inventor
余生荣
唐芮
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Filing date
Publication date
Application filed by Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to KR1020247025510A priority Critical patent/KR20260001456A/ko
Publication of WO2025236372A1 publication Critical patent/WO2025236372A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H10K59/122—Pixel-defining structures or layers, e.g. banks
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G09F9/335—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes being organic light emitting diodes [OLED]
    • 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
    • H10K59/1213—Active-matrix OLED [AMOLED] displays characterised by the geometry or disposition of pixel elements the pixel elements being TFTs
    • 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
    • H10K59/124—Insulating layers formed between TFT elements and OLED 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
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H10K59/352—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels the areas of the RGB subpixels being different
    • 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
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • 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
    • H10K59/8051—Anodes
    • 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
    • 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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/878—Arrangements for extracting light from the devices comprising reflective means
    • 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
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • 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
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00—Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301—Details of OLEDs
    • H10K2102/351—Thickness

Definitions

  • This application relates to the field of display technology, and in particular to a display panel and display device.
  • OLED Organic Light-Emitting Diode
  • OLED displays are widely used in various fields due to their advantages such as lightweight, wide viewing angle, low power consumption, fast response speed, low temperature resistance, high luminous efficiency, and the ability to fabricate flexible displays.
  • OLED displays include top-emitting OLEDs and bottom-emitting OLEDs. Top-emitting OLEDs are not affected by the transparency of the substrate, which can effectively increase the aperture ratio of the OLED display, facilitating integration with transistor backplanes and narrowing the spectrum and color purity, making them widely used in electronic products of all sizes. However, top-emitting OLEDs suffer from a relatively low external quantum efficiency (i.e., light output efficiency).
  • MLA microlens array
  • This application provides a display panel and a display device to solve the technical problem that existing methods for improving the light removal efficiency of OLED display devices using microstructured multilayer films have the risk of large thickness of the OLED display device and easy film peeling.
  • This application embodiment provides a display panel, the display panel including:
  • a driving circuit layer is disposed on one side of the substrate
  • a light-emitting functional layer is disposed on the side of the driving circuit layer away from the substrate.
  • the light-emitting functional layer includes a pixel electrode layer, a light-emitting material layer, and a pixel definition layer.
  • the pixel electrode layer is disposed on the side of the driving circuit layer away from the substrate.
  • the pixel definition layer is disposed on the side of the pixel electrode layer away from the driving circuit layer.
  • the light-emitting material layer is disposed on the side of the pixel definition layer away from the pixel electrode layer.
  • the pixel definition layer includes a first sub-layer and a second sub-layer.
  • the first sub-layer is disposed on the side of the pixel electrode layer away from the driving circuit layer and includes a first pixel opening.
  • the second sub-layer is disposed on the side of the first sub-layer away from the pixel electrode layer and extends into the first pixel opening.
  • the second sub-layer includes a second pixel opening.
  • the light-emitting material layer at least covers the second pixel opening.
  • the refractive index of the second sub-layer is greater than that of the first sub-layer.
  • this application provides a display device, which includes a display panel as described in any of the above embodiments.
  • Figure 1 is a schematic diagram of existing OLED display devices.
  • Figure 2 is a first schematic diagram of a display panel provided in an embodiment of this application.
  • Figure 3 is a schematic diagram of the first pixel opening and the second pixel opening provided in an embodiment of this application.
  • Figure 4 is a schematic diagram of the structure of the display panel corresponding to each step of the manufacturing method of the display panel provided in the embodiment of this application.
  • Figure 5 is a schematic diagram of a contrast display device provided in an embodiment of this application.
  • Figure 6 is a schematic diagram of another contrast display device provided in an embodiment of this application.
  • Figure 7 is a schematic diagram of another contrast display device provided in an embodiment of this application.
  • Figure 8 is a second schematic diagram of the display panel provided in an embodiment of this application.
  • Figure 9 is a third schematic diagram of the display panel provided in the embodiments of this application.
  • Figure 10 is a fourth schematic diagram of the display panel provided in the embodiments of this application.
  • first and second are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with “first” and “second” may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of” means two or more, unless otherwise explicitly specified.
  • the terms “installation,” “connection,” and “linking” should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
  • the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, “above,” “over,” and “on top” of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. “Below,” “below,” and “under” the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
  • an existing OLED display device includes a driving substrate 11, a planarization film layer 12, a pixel definition film layer 14, a light-emitting film layer 13, an encapsulation film layer 15, and a touch film layer 16 arranged sequentially.
  • a microstructured stacked film is provided on the touch film layer 16.
  • the touch film layer 16 is provided with a first light extraction layer 17 and a second light extraction layer 18. By making the refractive index of the first light extraction layer 17 less than that of the second light extraction layer 18, light can be emitted normally.
  • This application provides a display panel and a display device to address the aforementioned technical problems.
  • this application embodiment provides a display panel, which includes:
  • a driving circuit layer 22 is disposed on one side of the substrate 21;
  • a light-emitting functional layer 23 is disposed on the side of the driving circuit layer 22 away from the substrate 21.
  • the light-emitting functional layer 23 includes a pixel electrode layer 231, a light-emitting material layer 233, and a pixel definition layer 232.
  • the pixel electrode layer 231 is disposed on the side of the driving circuit layer 22 away from the substrate 21, the pixel definition layer 232 is disposed on the side of the pixel electrode layer 231 away from the driving circuit layer 22, and the light-emitting material layer 233 is disposed on the side of the pixel electrode layer 231 away from the driving circuit layer 22.
  • the pixel definition layer 232 includes a first sub-layer 232a and a second sub-layer 232b.
  • the first sub-layer 232a is disposed on the side of the pixel electrode layer 231 away from the driving circuit layer 22 and includes a first pixel opening 311.
  • the second sub-layer 232b is disposed on the side of the first sub-layer 232a away from the pixel electrode layer 231 and extends into the first pixel opening 311.
  • the second sub-layer 232b includes a second pixel opening 312.
  • the light-emitting material layer 233 at least covers the second pixel opening 312.
  • the refractive index of the second sub-layer 232b is greater than the refractive index of the first sub-layer 232a.
  • This application provides a display panel in which a pixel definition layer includes a first sub-layer and a second sub-layer, with the second sub-layer extending into the opening of a first pixel.
  • the refractive index of the second sub-layer is greater than that of the first sub-layer, so the contact surface between the first and second sub-layers forms a total internal reflection surface.
  • the pixel definition layer forms a microstructured multilayer film, eliminating the need for additional film layers and reducing the thickness of the display panel.
  • the microstructured multilayer film formed by the pixel definition layer is closer to the light-emitting material layer, which improves light extraction efficiency compared to microstructured multilayer films used in peripheral devices.
  • the pixel definition layer can be manufactured using a high-temperature process, offering greater material selectivity, more stable performance, and lower cost.
  • the first pixel opening 311 cannot be seen in Figure 2.
  • the first pixel opening 311 formed by the first sub-layer 232a can be defined by the boundary of the first sub-layer 232a.
  • the luminescent material layer 233 at least covers the second pixel opening 312.
  • the second pixel opening 312 cannot be seen in Figure 2, but the second pixel opening 312 formed by the second sub-layer 232b can be defined by the boundary of the second sub-layer 232b.
  • the light 26 emitted by the light-emitting material layer 233 passes through the second sub-layer 232b and illuminates the contact surface between the second sub-layer 232b and the first sub-layer 232a. Since the contact surface between the second sub-layer 232b and the first sub-layer 232a is a total reflection surface, the light is reflected out of the display panel, thereby improving the light emission efficiency of the display panel.
  • the microstructure stacked film in existing OLED display devices can only extract a portion of the light. Furthermore, the microstructure stacked film in existing OLED display devices cannot capture or extract light at downward angles or wide viewing angles.
  • a pixel definition layer is used to form the microstructure stacked film, which can extract light at downward angles and light at wide viewing angles, thereby improving the light extraction efficiency and the light emission efficiency of the display panel.
  • the existing process for forming the microstructured multilayer film can only use a low-temperature curing process to prevent the process from affecting the luminescent material. This results in greater difficulty in material development, fewer material choices, poor stability, and higher costs.
  • the pixel definition layer is formed before the formation of the luminescent material layer. Therefore, the process for forming the pixel definition layer will not affect the luminescent material layer.
  • a high-temperature process can be used to form the pixel definition layer, resulting in a wider range of material choices, lower costs, and more stable performance.
  • the material of the second sublayer includes a transparent material
  • the material of the first sublayer includes one of a transparent material and a non-transparent material
  • the material of the first sublayer includes a black material.
  • the thickness of the first sub-layer is greater than the thickness of the second sub-layer.
  • the light-emitting functional layer further includes a common electrode layer, wherein the thickness of the first sub-layer is greater than or equal to the sum of the thicknesses of the pixel electrode layer, the light-emitting material layer, and the common electrode layer.
  • the display panel further includes a filter layer, the filter layer including a plurality of color resists and a black matrix disposed between the color resists, the pixel definition layer being disposed corresponding to the black matrix, and the edge of the black matrix having a gap with the edge of the first sub-layer.
  • the distance between the edge of the black matrix and the edge of the second sublayer ranges from 2 micrometers to 4 micrometers, and the distance between the edge of the first sublayer and the edge of the second sublayer ranges from 1 micrometer to 3 micrometers.
  • the pixel electrode layer includes: a plurality of pixel electrodes arranged in an array, the first pixel opening is disposed corresponding to the corresponding pixel electrode, the second pixel opening is disposed corresponding to the corresponding first pixel opening, and the area of the second pixel opening is smaller than the area of the first pixel opening.
  • the shape of the first pixel opening is the same as the shape of the second pixel opening.
  • the second sublayer is in contact with a first lower surface near the substrate and at least a portion of a second upper surface of the first sublayer away from the substrate, and is in contact with a third upper surface of the pixel electrode away from the substrate.
  • the first sub-layer forms a first angle with the pixel electrode layer
  • the second sub-layer forms a second angle with the pixel electrode layer, wherein the first angle is greater than or equal to the second angle
  • the first included angle ranges from 20 degrees to 60 degrees.
  • the refractive index of the first sublayer ranges from 1.4 to 1.55, and the refractive index of the second sublayer ranges from 1.55 to 1.85.
  • the difference between the refractive index of the second sublayer and the refractive index of the first sublayer ranges from 0.1 to 0.15.
  • the light-emitting functional layer further includes a common electrode layer, the thickness of the first sub-layer is equal to the thickness of the second sub-layer, and the thickness of the pixel definition layer is greater than the sum of the thicknesses of the pixel electrode layer, the light-emitting material layer, and the common electrode layer.
  • the pixel electrode layer includes: a plurality of pixel electrodes arranged in an array, a first pixel opening corresponding to a corresponding pixel electrode, a second pixel opening corresponding to a corresponding first pixel opening, the area of the second pixel opening being smaller than the area of the first pixel opening, the projection of the second pixel opening on the substrate being located within the projection of the first pixel opening on the substrate, and the distance between the second pixel opening and the first pixel opening being in the range of 2 to 4 micrometers.
  • the pixel electrode layer 231 includes a plurality of pixel electrodes 231a arranged in an array.
  • a first pixel opening 311 is disposed corresponding to a corresponding pixel electrode 231a
  • a second pixel opening 312 is disposed corresponding to a corresponding first pixel opening 311.
  • the area of the second pixel opening 312 is smaller than the area of the first pixel opening 311.
  • the projection of the second pixel opening 312 on the substrate 21 lies within the projection of the first pixel opening 311 on the substrate 21, and the distance L3 between the second pixel opening 312 and the first pixel opening 311 ranges from 2 to 4 micrometers.
  • the first sub-layer and the second sub-layer can form a contact surface, which can reflect the light emitted by the light-emitting material layer, improving light efficiency.
  • the distance between the first pixel opening and the second pixel opening is in the range of 2 to 4 micrometers, resulting in a smaller thickness through which light passes, thereby reducing light loss and preventing the second sub-layer from being too thin to form a total reflection surface.
  • the width of the first pixel opening ranges from 5 micrometers to 100 micrometers
  • the width of the second pixel opening ranges from 5 micrometers to 100 micrometers.
  • the distance between the first pixel opening and the second pixel opening is 3 micrometers.
  • the width of the first pixel opening is limited by the width of the opening on the side of the first sub-layer closest to the pixel electrode layer.
  • the width of the second pixel opening is limited by the width of the opening on the side of the second sub-layer closest to the pixel electrode layer.
  • the display panel includes multiple pixel units, each pixel unit including at least a red sub-pixel, a blue sub-pixel, and a green sub-pixel, as shown in Figure 3.
  • the first pixel opening 311 includes a first green pixel opening 411 corresponding to the green sub-pixel, a first red pixel opening 412 corresponding to the red sub-pixel, and a first blue pixel opening 413 corresponding to the blue sub-pixel.
  • the second pixel opening 312 includes a second green pixel opening 421 corresponding to the green sub-pixel, a second red pixel opening 422 corresponding to the red sub-pixel, and a second blue pixel opening 423 corresponding to the blue sub-pixel.
  • the areas of the first pixel opening and the second pixel opening corresponding to different sub-pixels are different. It is understandable that, due to the different luminous efficiencies of different sub-pixels, when forming pixel openings corresponding to different sub-pixels, the areas of the pixel openings corresponding to different sub-pixels can be made different. For example, if the area of the blue sub-pixel is larger than the area of the green sub-pixel, then the area of the first blue pixel opening can be larger than the area of the first green pixel opening, and the area of the second blue pixel opening can be larger than the area of the second green pixel opening. However, the embodiments of this application are not limited to this; the area of the pixel opening can be set accordingly based on different pixel designs.
  • the spacing between the second pixel opening and the first pixel opening corresponding to different sub-pixels can be the same.
  • the spacing between the first blue pixel opening and the second blue pixel opening is equal to the spacing between the first green pixel opening and the second green pixel opening.
  • the spacing between the second pixel opening and the first pixel opening corresponding to different sub-pixels can be different.
  • the spacing between the first blue pixel opening and the second blue pixel opening is greater than or less than the spacing between the first green pixel opening and the second green pixel opening.
  • the shape of the first pixel opening 311 is the same as the shape of the second pixel opening 312, making the reflective surface formed by the first pixel opening and the second pixel opening relatively flat and having a better light reflection effect.
  • the shapes of the first pixel opening 311 and the second pixel opening 312 are both rhomboid, but the embodiments of this application are not limited to this, and the shapes of the first pixel opening and the second pixel opening can be other shapes.
  • the second sublayer 232b is in contact with at least a portion of the first sublayer 232a's second upper surface 512 away from the substrate 21 near the first lower surface 511 of the substrate 21, and with at least a portion of the pixel electrode 231a's third upper surface 513 away from the substrate 21.
  • the second sublayer and the first sublayer directly contact each other to form a reflective surface, resulting in better light extraction.
  • the second sublayer overlapping the pixel electrode ensures that the light-emitting material and the pixel electrode are correspondingly positioned, and the reflective surface formed by the first and second sublayers can reflect the light emitted by the light-emitting material, thereby improving the light extraction effect.
  • the first sub-layer 232a and the pixel electrode layer 231 form a first angle A1
  • the second sub-layer 232b and the pixel electrode layer 231 form a second angle A2, wherein the first angle A1 is greater than or equal to the second angle A2.
  • the contact surface between the second and first sub-layers is flat, and the total internal reflection surface formed by the second and first sub-layers has a better light extraction effect, thus improving the light emission efficiency of the display panel.
  • the embodiments of this application define the acute angle formed between the first sub-layer and the pixel electrode layer as the first included angle.
  • the acute angle formed between the second sub-layer and the pixel electrode layer is the second included angle.
  • the first included angle ranges from 20 degrees to 60 degrees
  • the second included angle ranges from 20 degrees to 60 degrees
  • the first included angle can be relatively small. This allows the second sublayer to overlap the first sublayer during its formation, preventing breakage. Furthermore, to prevent the first included angle from being too small and causing light to diffuse and fail to reach the contact surface between the first and second sublayers, the first included angle can be relatively large, resulting in a range of 20 to 60 degrees. By setting the second sublayer to have the same angle as the first sublayer, breakage during subsequent film formation can be prevented, and an angle that is too small would prevent light reflection. This range of 20 to 60 degrees ensures high light emission efficiency for the display panel.
  • the difference between the refractive indices of the second sublayer and the first sublayer ranges from 0.1 to 0.15.
  • the total internal reflection surface formed by the first and second sublayers has a better light extraction effect, improving the light extraction efficiency of the display panel, and avoiding excessive light scattering due to an excessively large difference in refractive indices between the first and second sublayers, thus improving the light efficiency of the display panel.
  • the refractive index of the first sublayer ranges from 1.4 to 1.55, and the refractive index of the second sublayer ranges from 1.55 to 1.85.
  • the total internal reflection surface formed by the first and second sublayers has a better light reflection effect, thereby improving the light emission efficiency of the display panel.
  • the contrast display device includes a substrate 61, an array film 62, a light-emitting film 63, an encapsulation film 64, and a circular polarizer 65.
  • the light-emitting film 63 includes a reflective anode 631, a pixel definition film 632, an organic material 633, and a transparent cathode 634.
  • the circular polarizer 65 includes a linear polarizer 651 and a quarter-wave plate 652. By setting the circular polarizer, the influence of external incident light is prevented, thereby improving the display effect of the contrast display device.
  • the linear polarizer 651 allows light rays at angles parallel to its transmission axis to pass through (Figure 6 uses the transmission axis direction as an example, e.g., left-right). Light rays at other angles are blocked by the linear polarizer 651. Then, when the external light 661 shines on the quarter-wave plate 652, it is converted into circularly polarized light. This circularly polarized light, after shining on the reflective anode 631, is reflected back to the quarter-wave plate 652.
  • the quarter-wave plate 652 then converts the circularly polarized light into light rays perpendicular to the transmission axis of the linear polarizer 651, preventing the light from passing through the linear polarizer 651. This absorbs the external light and reduces the reflectivity of the contrast display device.
  • the thickness of the circular polarizer is approximately 50 to 100 micrometers, which increases the thickness of the contrast display device and results in the loss of some emitted light.
  • this application provides an alternative contrast display device, as shown in Figure 6.
  • This contrast display device employs PLP (Pol Less Panel) technology, replacing the circular polarizer with a filter film 67, thereby reducing the thickness of the contrast display device, increasing its brightness, and reducing power consumption.
  • PLP Poly Less Panel
  • the filter film 67 includes a black matrix 671 and a color resist film 672.
  • the black matrix 671 When external light 661 shines on the filter film 67, some light shines on the black matrix 671 and some light shines on the color resist film 672.
  • the light shining on the black matrix 671 is absorbed by the black matrix 671, which has an absorption rate of approximately 99.75%. Even if some light passes through the black matrix 671 and shines on the reflective anode 631, it will be absorbed again by the black matrix 671 upon reflection, resulting in virtually no light being reflected from the external light 661 to the contrast display device.
  • the color resist film 672 needs to be transparent, some of the external light shining on it will pass through the color resist film 672 and be reflected by the reflective anode 631 before being reflected from the color resist film 672 to the contrast display device. This results in a higher reflectivity of the contrast display device and a poorer display effect.
  • the array film 62 includes a metal film 621
  • the encapsulation film 64 includes a first encapsulation film 641, a second encapsulation film 642, and a third encapsulation film 643, and the contrast display device also includes an insulating film 681.
  • the color resist film 672 includes a red color resist film 672a.
  • Figure 7 illustrates the optical path when external light 661 shines on the red color resist film 672a. It can be understood that when external light 661 shines on the green and blue color resist films, please refer to the following description.
  • the external light 661 includes red, green and blue light.
  • the red color resist film 672a When passing through the red color resist film 672a, only the red light in the external light 661 passes through. After passing through each film layer of the contrast display device in sequence, the red light in the external light 661 will illuminate the reflective anode 631 and the metal film 621, and then be reflected out of the contrast display device from another red color resist film 672a. This results in a high reflectivity of the contrast display device, leading to a poor display effect.
  • this application provides some embodiments to solve the above-mentioned technical problems.
  • the material of the second sub-layer includes a transparent material
  • the material of the first sub-layer includes one of a transparent material and a non-transparent material.
  • the material of the second sublayer includes transparent organic photoresist
  • the material of the first sublayer includes organic photoresist
  • the material of the first sublayer can be a non-transparent material, which allows light to pass through the second sublayer but not through the first sublayer, preventing light from shining downwards onto the thin-film transistor and causing electrical shift in the thin-film transistor, thus improving the stability of the thin-film transistor.
  • the material of the second sub-layer includes a transparent material
  • the material of the first sub-layer includes a non-transparent material.
  • the cooperation between the first and second sub-layers improves the light extraction efficiency.
  • the first sub-layer can prevent the light emitted by the light-emitting material from affecting the performance of the thin-film transistor.
  • the second sub-layer can absorb the light, reducing the reflectivity of the display panel.
  • the light extraction effect of the display panel is improved without increasing the thickness of the display panel, while reducing the reflection of light by the display panel and improving the display effect.
  • the material of the first sub-layer 232a includes a black material.
  • the interface formed by the first sub-layer and the second sub-layer can improve the light emission efficiency of the display panel, and the first sub-layer can absorb external light, thereby reducing the reflection of external light by the display panel and improving the display effect.
  • the material of the first sublayer includes polymethacrylic acid resin.
  • the thickness L1 of the first sub-layer 232a is greater than the thickness L2 of the second sub-layer 232b.
  • the light-emitting functional layer 23 further includes a common electrode layer 234, wherein the thickness L1 of the first sub-layer 232a is greater than or equal to the sum L2 of the thicknesses of the pixel electrode layer 231, the light-emitting material layer 233, and the common electrode layer 234.
  • the second sub-layer can absorb more light, thereby further reducing the reflection of external light by the display panel and improving the display effect.
  • the first sub-layer when the first sub-layer is a non-transparent material, and even more specifically, when it is a black material, although the interface between the first and second sub-layers can still reflect light, the first sub-layer also absorbs light. Therefore, the thickness of the first sub-layer can be determined based on the actual light angle, thus balancing the light emission efficiency of the display panel and the effect of reducing the reflected light of the display panel.
  • the display panel 2 further includes a light filter layer 28.
  • the light filter layer 28 includes a plurality of color resists 282 and a black matrix 281 disposed between the color resists 282.
  • the pixel definition layer 232 is correspondingly disposed with respect to the black matrix 281, and the edge of the black matrix 281 is spaced from the edge of the first sub-layer 232a.
  • the light filter layer can prevent the display panel from reflecting external light, and the thickness of the display panel is smaller than that of a display panel using a circular polarizer.
  • the black matrix can prevent it from blocking the light emitted by the light-emitting functional layer, thereby improving the light extraction efficiency of the display panel.
  • color resists can include red, green, and blue color resists.
  • the pixel definition layer include a first sub-layer and a second sub-layer, and by making the material of the first sub-layer black, when external light passes through the color filter, the first sub-layer absorbs and blocks part of the light.
  • the first and second sub-layers can still form a total reflection surface, allowing the light emitted by the light-emitting material layer to be emitted, thereby improving the light emission efficiency of the display panel.
  • this solution can be implemented without increasing the thickness of the display panel, thus achieving the goals of reducing the thickness of the display panel, improving the light emission efficiency of the display panel, reducing the reflectivity of the display panel to external light, and improving the display effect.
  • the distance L6 between the edge of the black matrix 281 and the edge of the second sub-layer 232b ranges from 2 micrometers to 4 micrometers
  • the distance L5 between the edge of the first sub-layer 232a and the edge of the second sub-layer 232b ranges from 1 micrometer to 3 micrometers.
  • the distance between the edge of the black matrix and the edge of the second sub-layer range from 2 micrometers to 4 micrometers, the light emitted by the display panel can be emitted from the opening of the black matrix, thereby improving the light emission effect of the display panel; by making the distance between the edge of the second sub-layer and the edge of the first sub-layer range from 1 micrometer to 3 micrometers, the light emitted by the light-emitting material layer can pass through the pixel definition layer, thereby improving the light emission effect of the display panel.
  • the distance between the edge of the first sub-layer and the edge of the second sub-layer can be the distance between the opening of the first pixel and the opening of the second pixel.
  • red color resist 282a when external light 661 shines on red color resist 282a, green and blue light cannot pass through it. After the red light passes through red color resist 282a, some light directly shines on pixel electrode layer 231, and some light shines on pixel definition layer. In contrast, in a display device, some light passes through pixel definition layer and shines on pixel electrode layer and is reflected, while other light passes through pixel definition layer and shines on metal layer and is reflected.
  • the first sub-layer when the first sub-layer is a non-transparent material, specifically a black material, it directly absorbs the light shining on pixel definition layer, thereby reducing the light reflected from the display panel, reducing the reflectivity of the display panel to external light, and improving the display effect.
  • the material of the first sublayer includes one of acrylic resin, epoxy resin, phenolic resin, and polyamide resin
  • the material of the second sublayer includes one of acrylic resin, epoxy resin, phenolic resin, and polyamide resin.
  • the properties of each resin can be changed by adjusting the dopants or groups within each system.
  • the first sublayer formed can be opaque, but the second sublayer formed can be transparent, thereby achieving different functions of different film layers.
  • the light-emitting functional layer 23 further includes a common electrode layer 234.
  • the thickness L1 of the first sub-layer 232a is greater than or equal to the thickness L2 of the second sub-layer 232b, and the thickness of the pixel definition layer 232 is greater than the sum of the thicknesses L4 of the pixel electrode layer 231, the light-emitting material layer 233, and the common electrode layer 234.
  • the thickness of the first sub-layer equal to the thickness of the second sub-layer, and the thickness of the pixel definition layer greater than the sum of the thicknesses of the pixel electrode layer, the light-emitting material layer, and the common electrode layer, the overflow of the light-emitting material layer into the corresponding second pixel opening is avoided, resulting in better uniformity of the display panel.
  • the above embodiments are illustrated using the example that the thickness of the first sublayer is equal to the thickness of the second sublayer.
  • the embodiments of this application are not limited to this, and the thicknesses of the first sublayer and the second sublayer may be different.
  • the above embodiments are illustrated by taking the example that the thickness of the pixel definition layer is greater than the sum of the thicknesses of the pixel electrode layer, the light-emitting material layer, and the common electrode layer.
  • the embodiments of this application are not limited to this.
  • the thickness of the pixel definition layer can be equal to the sum of the thicknesses of the pixel electrode layer, the light-emitting material layer, and the common electrode layer, so that the thickness of the pixel definition layer is smaller and the height difference between different regions of the common electrode layer is smaller, thus avoiding breakage of the common electrode layer.
  • the thickness of the first sublayer ranges from 0.3 micrometers to 5 micrometers.
  • the thickness of the second sublayer ranges from 0.3 micrometers to 5 micrometers.
  • the substrate 21 includes a first flexible layer 211, a first barrier layer 212, a second flexible layer 213, and a second barrier layer 214.
  • the driving circuit layer 22 includes a thin-film transistor array layer 221 and a planarization layer 222.
  • the driving circuit layer 22 includes a buffer layer 271, an active layer 272, a first gate insulating layer 273, a first metal layer 274, a second gate insulating layer 275, an interlayer insulating layer 276, a first source-drain layer 277, a first planarization layer 278, a second source-drain layer 279, and a second planarization layer 280.
  • the thin-film transistor array layer 221 includes a buffer layer, an active layer, a first gate insulating layer, a first metal layer, a second gate insulating layer, a second metal layer, an interlayer insulating layer, and a source/drain layer, which are sequentially arranged.
  • the display panel also includes an encapsulation layer 24 and a touch layer 25.
  • the encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer.
  • the encapsulation layer 24 includes a first inorganic layer 241, an organic layer 242, and a second inorganic layer 243 arranged sequentially.
  • the touch layer includes a first electrode layer, an insulating layer, and a second electrode layer.
  • the touch layer 25 includes a first insulating layer 251, a first electrode layer 252, a second insulating layer 253, and a second electrode layer 254.
  • the display panel 2 also includes a planarization layer 291, an optical adhesive layer 292, and a cover plate 293.
  • the first sub-layer forms a first angle with the pixel electrode layer
  • the second sub-layer forms a second angle with the pixel electrode layer.
  • the first angle is equal to the second angle
  • the difference between the refractive index of the second sub-layer and the refractive index of the first sub-layer ranges from 0.1 to 0.15.
  • the material of the first sub-layer includes a black material
  • the shape of the first pixel opening is the same as the shape of the second pixel opening.
  • this application embodiment provides a method for manufacturing a display panel, the method comprising:
  • a substrate is provided, and a driving circuit layer is formed on the substrate; the structure of the display panel corresponding to this step is shown in Figure 4(a);
  • a pixel electrode layer and a first sub-layer are formed on the driving circuit layer; the structure of the display panel corresponding to this step is shown in Figure 4(a);
  • the first sub-layer is patterned using an exposure and development process, forming a first pixel opening in the region corresponding to the pixel electrode layer to expose the pixel electrode layer; the structure of the display panel corresponding to this step is shown in Figure 4(b);
  • a second sublayer is formed by coating on the first sublayer, and the second sublayer is patterned using an exposure and development process to form a second pixel opening in the region corresponding to the pixel electrode layer, so as to expose the pixel electrode layer; the structure of the display panel corresponding to this step is shown in Figure 4(c).
  • a light-emitting material layer, a common electrode layer, an encapsulation layer, and a touch layer are sequentially formed on the second sub-layer; the structure of the display panel corresponding to this step is shown in Figure 2.
  • this application provides a display device, which includes a display panel as described in any of the above embodiments.
  • the display panel includes a substrate, a driving circuit layer, and a light-emitting functional layer.
  • the driving circuit layer is disposed on one side of the substrate, and the light-emitting functional layer is disposed on the side of the driving circuit layer away from the substrate.
  • the light-emitting functional layer includes a pixel electrode layer, a light-emitting material layer, and a pixel definition layer.
  • the pixel electrode layer is disposed on the side of the driving circuit layer away from the substrate, the pixel definition layer is disposed on the side of the pixel electrode layer away from the driving circuit layer, and the light-emitting material layer is disposed on the side of the pixel electrode layer away from the driving circuit layer.
  • the pixel definition layer includes a first sub-layer and a second sub-layer.
  • the first sub-layer is disposed on the side of the pixel electrode layer away from the driving circuit layer and includes a first pixel opening.
  • the second sub-layer is disposed on the side of the first sub-layer away from the pixel electrode layer and extends into the first pixel opening.
  • the second sub-layer includes a second pixel opening.
  • the light-emitting material layer at least covers the second pixel opening, and the refractive index of the second sub-layer is greater than that of the first sub-layer.
  • the refractive index of the second sub-layer is greater than that of the first sub-layer, thus forming a total internal reflection surface at the contact surface between the first and second sub-layers.
  • the pixel layer forms a microstructured laminated film, eliminating the need for additional film layers and reducing the thickness of the display panel.
  • the microstructured laminated film formed by the pixel layer is closer to the luminescent material layer, which improves light extraction efficiency compared to microstructured laminated films used in peripherals.
  • the pixel layer can be manufactured using a high-temperature process, offering greater material selectivity, more stable performance, and lower cost.

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Abstract

本申请提供一种显示面板和显示装置，该显示面板通过使像素定义层包括第一子层和第二子层，第二子层的折射率大于第一子层的折射率，则可以提高显示面板的出光效率，且通过像素定义层形成微结构叠层膜，无需额外增加膜层，减小了显示面板的厚度，且像素定义层可以采用高温制程，材料选择性较多，性能更加稳定，成本更低。

Description

显示面板和显示装置
本申请要求于2024年06月25日提交的申请号为202410831483.3的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其是涉及一种显示面板和显示装置。
 背景技术
OLED（Organic Light-Emitting Diode，有机发光二极管）显示器件由于具有轻巧、广视角、低功耗、响应速度快、耐低温、发光效率高，且能制备弯曲的柔性显示屏，被广泛应用在各个领域。OLED显示器件包括顶发射OLED显示器件和底发射OLED显示器件，顶发射OLED显示器件由于不受基板是否透光的影响，可有效提高OLED显示器件的开口率，有利于与晶体管背板集成，并能够窄化光谱和色纯度，被广泛应用于大小电子产品内。但顶发光OLED显示器件存在外量子效率（即光输出效率）较低的问题，经研究发现该问题是由于波导效应、基板效应、表面等离子体效应、吸收效应等影响造成，为了提高光取出效率，现有OLED显示器件中会设置微结构（micro lens array，MLA）叠层膜，具体会在触控层上方设置MLA结构，提高光取出效率。但在触控层上方设置MLA结构会导致OLED显示器件的厚度增大，且在OLED显示器件为动态弯折、瀑布屏以及四曲屏中的一种时，容易出现膜层剥离的风险。
所以，现有采用微结构叠层膜提高OLED显示器件的光去除效率的方法存在OLED显示器件的厚度较大，且容易出现膜层剥离的风险的技术问题。
 发明概述
本申请实施例提供一种显示面板和显示装置，用以解决现有采用微结构叠层膜提高OLED显示器件的光去除效率的方法存在OLED显示器件的厚度较大，且容易出现膜层剥离的风险的技术问题。
为解决上述问题，本申请提供的技术方案如下：
本申请实施例提供一种显示面板，该显示面板包括：
衬底；
驱动电路层，设置于所述衬底一侧；
发光功能层，设置于所述驱动电路层远离所述衬底的一侧，所述发光功能层包括像素电极层、发光材料层和像素定义层，所述像素电极层设置于所述驱动电路层远离所述衬底的一侧，所述像素定义层设置于所述像素电极层远离所述驱动电路层的一侧，所述发光材料层设置于所述像素定义层远离所述像素电极层的一侧；
其中，所述像素定义层包括第一子层和第二子层，所述第一子层设置于所述像素电极层远离所述驱动电路层的一侧，所述第一子层包括第一像素开口，所述第二子层设置于所述第一子层远离所述像素电极层的一侧且延伸至所述第一像素开口内，所述第二子层包括第二像素开口，所述发光材料层至少覆盖所述第二像素开口，所述第二子层的折射率大于所述第一子层的折射率。
同时，本申请实施例提供一种显示装置，该显示装置包括如上述实施例任一所述的显示面板。
 附图说明
下面结合附图，通过对本申请的具体实施方式详细描述，将使本申请的技术方案及其它有益效果显而易见。
图1为现有OLED显示器件的示意图。
图2为本申请实施例提供的显示面板的第一种示意图。
图3为本申请实施例提供的第一像素开口和第二像素开口的示意图。
图4为本申请实施例提供的显示面板的制备方法的各步骤对应的显示面板的结构示意图。
图5为本申请实施例提供的一种对比显示器件的示意图。
图6为本申请实施例提供的另一种对比显示器件的示意图。
图7为本申请实施例提供的再一种对比显示器件的示意图。
图8为本申请实施例提供的显示面板的第二种示意图。
图9为本申请实施例提供的显示面板的第三种示意图。
图10为本申请实施例提供的显示面板的第四种示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请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申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接或可以相互通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
下文的公开提供了许多不同的实施方式或例子用来实现本申请的不同结构。为了简化本申请的公开，下文中对特定例子的部件和设置进行描述。当然，它们仅仅为示例，并且目的不在于限制本申请。此外，本申请可以在不同例子中重复参考数字和/或参考字母，这种重复是为了简化和清楚的目的，其本身不指示所讨论各种实施方式和/或设置之间的关系。此外，本申请提供了的各种特定的工艺和材料的例子，但是本领域普通技术人员可以意识到其他工艺的应用和/或其他材料的使用。
如图1所示，现有OLED显示器件包括依次设置的驱动基板11、平坦化膜层12、像素定义膜层14、发光膜层13、封装膜层15和触控膜层16，为了提高OLED显示器件的出光效率，会通过在触控膜层16上设置微结构叠层膜，具体的，如图1所示，触控膜层16上设有第一光取出层17和第二光取出层18，通过使第一光取出层17的折射率小于第二光取出层18的折射率，使得光线能够正常出射，如图1所示，可以看到发光膜层13发出的内部光线19在照射到微结构叠层膜上被反射出OLED显示器件，从而提高了OLED显示器件的出光效率。可以理解的是，由于OLED显示器件是在触控膜层16上设置微结构叠层膜，会导致OLED显示器件的厚度增加，且在OLED显示器件为弯折显示器件时，如果应用在静态弯折屏上，出现膜层剥离的风险较低，但应用在动态弯折屏、瀑布屏、四曲屏等产品上时，会导致微结构叠层膜的剥离和断裂风险较高。所以，现有采用微结构叠层膜提高OLED显示器件的光去除效率的方法存在OLED显示器件的厚度较大，且容易出现膜层剥离的风险的技术问题。
本申请实施例针对上述技术问题，提供一种显示面板和显示装置，用以解决上述技术问题。
如图2所示，本申请实施例提供一种显示面板，该显示面板2包括：
衬底21；
驱动电路层22，设置于所述衬底21一侧；
发光功能层23，设置于所述驱动电路层22远离所述衬底21的一侧，所述发光功能层23包括像素电极层231、发光材料层233和像素定义层232，所述像素电极层231设置于所述驱动电路层22远离所述衬底21的一侧，所述像素定义层232设置于所述像素电极层231远离所述驱动电路层22的一侧，所述发光材料层233设置于所述像素电极层231远离所述驱动电路层22的一侧；
其中，所述像素定义层232包括第一子层232a和第二子层232b，所述第一子层232a设置于所述像素电极层231远离所述驱动电路层22的一侧，所述第一子层232a包括第一像素开口311，所述第二子层232b设置于所述第一子层232a远离所述像素电极层231的一侧且延伸至所述第一像素开口311内，所述第二子层232b包括第二像素开口312，所述发光材料层233至少覆盖所述第二像素开口312，所述第二子层232b的折射率大于所述第一子层232a的折射率。
本申请实施例提供一种显示面板，该显示面板通过使像素定义层包括第一子层和第二子层，且使得第二子层延伸至第一像素开口内，第二子层的折射率大于第一子层的折射率，则第一子层和第二子层的接触面会形成全反射面，使得发光材料层发出的光线在照射到第一子层和第二子层的接触面时，会被反射出显示面板，提高显示面板的出光效率，且通过像素定义层形成微结构叠层膜，无需额外增加膜层，减小了显示面板的厚度，且像素定义层形成的微结构叠层膜更靠近发光材料层，相较于外设的微结构叠层膜可以提高光提取效率，且像素定义层可以采用高温制程，材料选择性较多，性能更加稳定，成本更低。
具体的，如图2所示，由于第二子层232b填充至第一像素开口311内，因此，图2中无法看出第一像素开口311，但可以理解的是，第一子层232a形成的第一像素开口311可以第一子层232a的边界为界线确定。同理，发光材料层233至少覆盖第二像素开口312，图2中无法看出第二像素开口312，第二子层232b形成的第二像素开口312可以第二子层232b的边界为界限确定。
具体的，如图2所示，可以看到发光材料层233发出的光线26在穿过第二子层232b后，照射到第二子层232b与第一子层232a的接触面时，由于第二子层232b和第一子层232a的接触面为全反射面，使得光线被反射出显示面板，提高显示面板的出光效率。
具体的，如图1、图2所示，由于本申请实施例通过像素定义层232形成微结构叠层膜，相较于现有OLED显示器件在触控层外新增多个膜层形成微结构叠层膜，本申请无需新增额外膜层，可以减小OLED显示器件的厚度，且由于像素定义层232设置在显示面板内，像素定义层与其他膜层之间出现剥离的风险降低，使得本申请实施例采用的第一子层和第二子层的结构可以应用在静态弯折屏、瀑布屏、动态弯折屏和四曲屏上，提高了产品形态适配率。
具体的，如图1、图2所示，可以看到，光线从发光材料层发出后会进行发散，因此，现有OLED显示器件中的微结构叠层膜仅能对部分光线进行提取，且对于向下或者大视角的角度，现有OLED显示器件中的微结构叠层膜无法捕捉也无法提取，而本申请实施例中是采用像素定义层形成微结构叠层膜，可以对角度向下的光线和大视角的光线进行提取，提高了的光提取效率，提高了显示面板的出光效率。
具体的，如图1、图2所示，相较于现有OLED显示器件是在形成发光材料后形成微结构叠层膜，因此，为了防止工艺对发光材料的影响，现有形成微结构叠层膜的工艺只能采用低温固化制程，导致材料开发难度较大，选择性较少，且稳定性较差、成本较高，而本申请实施例中的像素定义层是在形成发光材料层之前形成，因此，形成像素定义层的工艺不会对发光材料层产生影响，可以采用高温制程形成像素定义层，使得材料选择性更广、成本更低、性能更加稳定。
在一些实施例中，所述第二子层的材料包括透明材料，所述第一子层的材料包括透明材料和非透明材料中的一种。
在一些实施例中，所述第一子层的材料包括黑色材料。
在一些实施例中，所述第一子层的厚度大于所述第二子层的厚度。
在一些实施例中，所述发光功能层还包括公共电极层，所述第一子层的厚度大于或者等于所述像素电极层、发光材料层和公共电极层的厚度之和。
在一些实施例中，所述显示面板还包括滤光层，所述滤光层包括多个色阻和设置于所述色阻之间的黑色矩阵，所述像素定义层与所述黑色矩阵对应设置，且所述黑色矩阵的边缘与所述第一子层的边缘存在间距。
在一些实施例中，所述黑色矩阵的边缘与所述第二子层的边缘的间距的范围为2微米至4微米，所述第一子层的边缘与所述第二子层的边缘的间距的范围为1微米至3微米。
在一些实施例中，所述像素电极层包括：多个阵列排布的像素电极，所述第一像素开口对应相应的所述像素电极设置，所述第二像素开口对应相应的所述第一像素开口设置，所述第二像素开口的面积小于所述第一像素开口的面积。
在一些实施例中，所述第一像素开口的形状与所述第二像素开口的形状相同。
在一些实施例中，所述第二子层靠近所述衬底的第一下表面与至少部分的所述第一子层远离所述衬底的第二上表面接触，并与至少部分的所述像素电极远离所述衬底的第三上表面接触。
在一些实施例中，所述第一子层与所述像素电极层形成有第一夹角，所述第二子层与所述像素电极层形成有第二夹角，所述第一夹角大于或等于所述第二夹角。
在一些实施例中，所述第一夹角的取值范围为20度至60度。
在一些实施例中，所述第一子层的折射率的范围为1.4至1.55，所述第二子层的折射率的范围为1.55至1.85。
在一些实施例中，所述第二子层的折射率与所述第一子层的折射率的差值的范围为0.1至0.15。
在一些实施例中，所述发光功能层还包括公共电极层，所述第一子层的厚度等于所述第二子层的厚度，且所述像素定义层的厚度大于所述像素电极层、发光材料层和公共电极层的厚度之和。
在一些实施例中，所述像素电极层包括：多个阵列排布的像素电极，所述第一像素开口对应相应的所述像素电极设置，所述第二像素开口对应相应的所述第一像素开口设置，所述第二像素开口的面积小于所述第一像素开口的面积，所述第二像素开口在所述衬底上的投影位于所述第一像素开口在所述衬底上的投影内，所述第二像素开口与所述第一像素开口的间距的范围为2至4微米。
在一些实施例中，如图2所示，所述像素电极层231包括：多个阵列排布的像素电极231a，所述第一像素开口311对应相应的所述像素电极231a设置，所述第二像素开口312对应相应的所述第一像素开口311设置，所述第二像素开口312的面积小于所述第一像素开口311的面积。通过使像素电极对应第一像素开口设置，第二像素开口对应第一像素开口设置，且第二像素开口的面积小于第一像素开口的面积，则第一子层和第二子层能够形成接触面，使得第一子层和第二子层形成的接触面能够将发光材料层发出的光线反射出去，提高光线效率。
在一些实施例中，如图2、图3所示，所述第二像素开口312在所述衬底21上的投影位于所述第一像素开口311在所述衬底21上的投影内，所述第二像素开口312与所述第一像素开口311的间距L3的范围为2至4微米。通过使第二像素开口在衬底上的投影位于第一像素开口在衬底上的投影内，使得第一子层和第二子层能够形成接触面，使得第一子层和第二子层形成的接触面能够将发光材料层发出的光线反射出去，提高光线效率，且使得第一像素开口与第二像素开口的间距的范围为2至4微米，使得光线穿过的厚度较小，从而可以降低光线损失，且避免第二子层的厚度过小导致无法形成全反射面。
具体的，第一像素开口的宽度范围为5微米至100微米，第二像素开口的宽度范围为5微米至100微米。
具体的，第一像素开口与第二像素开口的间距为3微米。
具体的，考虑到像素开口的截面形状可能为梯形，第一像素开口的宽度以第一子层靠近像素电极层的一侧的开口的宽度进行限定，同理，第二像素开口的宽度以第二子层靠近像素电极层的一侧的开口的宽度进行限定。
具体的，显示面板包括多个像素单元，每一像素单元至少包括红色子像素、蓝色子像素和绿色子像素，如图3所示，第一像素开口311包括对应绿色子像素的第一绿色像素开口411、对应红色子像素的第一红色像素开口412和对应蓝色子像素的第一蓝色像素开口413，第二像素开口312包括对应绿色子像素的第二绿色像素开口421、对应红色子像素的第二红色像素开口422和对应蓝色子像素的第二蓝色像素开口423。从图3中可以看到，对应不同子像素的第一像素开口和第二像素开口的面积不同。可以理解的是，由于不同子像素的发光效率不同，在形成不同的子像素对应的像素开口时，可以使对应不同子像素的像素开口的面积不同，例如，蓝色子像素的面积大于绿色子像素的面积，则可以使第一蓝色像素开口的面积大于第一绿色像素开口的面积，使第二蓝色像素开口的面积大于第二绿色像素开口的面积。但本申请实施例不限于此，基于不同的像素设计，可以对应设置像素开口的面积。
具体的，可以使对应不同的子像素的第二像素开口和第一像素开口之间的间距相同，例如，第一蓝色像素开口与第二蓝色像素开口之间的间距，等于第一绿色像素开口与第二绿色像素开口之间的间距，也可以使对应不同的子像素的第二像素开口和第一像素开口之间的间距不相同，例如，第一蓝色像素开口与第二蓝色像素开口之间的间距，大于或者小于第一绿色像素开口与第二绿色像素开口之间的间距。
在一些实施例中，如图3所示，所述第一像素开口311的形状与所述第二像素开口312的形状相同，使得第一像素开口和第二像素开口形成的反射面较为平整，对光线的反射效果较好。例如图3中第一像素开口311和第二像素开口312的形状均为菱形，但本申请实施例不限于此，可以使第一像素开口和第二像素开口的形状为其他形状。
在一些实施例中，如图2所示，所述第二子层232b靠近所述衬底21的第一下表面511与至少部分的所述第一子层232a远离所述衬底21的第二上表面512接触，并与至少部分的所述像素电极231a远离所述衬底21的第三上表面513接触。通过使第二子层搭接在第一子层上，使得第二子层与第一子层直接接触形成反射面，光提取效果较好，且第二子层搭接在像素电极上，使得发光材料与像素电极对应设置，且第一子层和第二子层形成的反射面能够对发光材料发出的光线进行反射，提高光提取效果。
在一些实施例中，如图2所示，所述第一子层232a与所述像素电极层231形成有第一夹角A1，所述第二子层232b与所述像素电极层231形成有第二夹角A2，所述第一夹角A1大于或等于所述第二夹角A2。通过使第一夹角大于第二夹角，使得光线能够照射至第一子层与第二子层的反射面，提高光提取效果，使第一子层与像素电极层形成的夹角等于第二子层与像素电极层形成的夹角，使得第二子层和第一子层的接触面平整，第二子层和第一子层形成的全反射面对光提取的效果较好，提高显示面板的出光效率。
具体的，由于第一子层与像素电极层形成的夹角包括锐角和钝角，本申请实施例定义第一子层与像素电极层形成的锐角为第一夹角，同理，第二子层与像素电极层形成的锐角为第二夹角。
在一些实施例中，所述第一夹角的取值范围为20度至60度，所述第二夹角的取值范围为20度至60度。
具体的，为了防止第二子层搭接在第一子层的侧面时出现断裂的问题，可以使第一夹角的角度较小，从而在形成第二子层时，第二子层可以搭接在第一子层上，避免第二子层断裂，且为了防止第一夹角的角度过小导致光线发散无法照射到第一子层和第二子层的接触面，可以使第一夹角相对较大，从而使得第一夹角的取值范围为20度至60度。在设置第二子层时，使第二子层的角度与第一子层的角度相同，可以防止后续膜层形成时出现断裂，也可以避免角度过小导致无法对光线反射，从而使得第一夹角和第二夹角的范围为20度至60度，使得显示面板的出光效率较高。
在一些实施例中，所述第二子层的折射率与所述第二子层的折射率的差值的范围为0.1至0.15。通过使第二子层的折射率与第一子层的折射率的差值的范围为0.1至0.15，使得第一子层与第二子层形成的全反射面对光线的提取效果较好，提高显示面板的出光效率，且避免第一子层和第二子层的折射率差值过大导致光线散射过多，提高显示面板的光效。
在一些实施例中，所述第一子层的折射率的范围为1.4至1.55，所述第二子层的折射率的范围为1.55至1.85。通过使第一子层的折射率范围为1.4至1.55，第二子层的折射率的范围为1.55至1.85，使得第一子层和第二子层形成的全反射面对光线的反射效果较好，提高显示面板的出光效率。
具体的，作为本申请实施例的引子，此处提供一种对比显示器件，如图5所示，对比显示器件包括基板61、阵列膜62、发光膜63、封装膜64和圆偏光片65，发光膜63包括反射阳极631、像素定义膜632、有机材料633和透明阴极634，圆偏光片65包括线偏光膜651和四分之一波片652，通过设置圆偏光片，防止外界入射光线的影响，提高对比显示器件的显示效果。如图6所示，可以看到在各个角度的外界光线661照射到对比显示器件上时，线偏光膜651会使与线偏光膜651的透光轴平行的方向的角度的光线透过（图6中以透光轴方向为左右方向为例进行说明），而其他角度的光线将被线偏光膜651阻挡，然后外界光线661照射至四分之一波片652后，会被四分之一波片652转换为圆偏振光，圆偏振光在照射至反射阳极631后会被反射回四分之一波片652，此时四分之一波片652会将圆偏振光转换为与线偏光膜651的透光轴垂直的光线，导致光线无法穿过线偏光膜651，从而实现了对外界光线的吸收，降低对比显示器件的反射率。但圆偏光片的厚度大约为50微米至100微米，会导致对比显示器件的厚度增大，且损失部分出射光线。
为了解决采用圆偏光片的对比显示器件存在的厚度较大且光线存在损失的问题，本申请实施例提供另一种对比显示器件，如图6所示，该对比显示器件采用PLP（Pol Less Panel）技术，通过滤光膜67取代圆偏光片，从而可以减小对比显示器件的厚度，且提高对比显示器件的亮度并降低功耗。
具体的，如图6所示，滤光膜67包括黑矩阵671和色阻膜672，在外界光线661照射到滤光膜67时，部分光线会照射到黑矩阵671上，部分光线会照射到色阻膜672上，照射至黑矩阵671上的光线会被黑矩阵671吸收，黑矩阵671对光线的吸收率约为99.75%，即使部分光线穿过黑矩阵671照射至反射阳极631，在反射至黑矩阵671时，光线会被黑矩阵671再次吸收，使得外界光线661照射至黑矩阵后基本无光线反射出对比显示器件。而由于色阻膜672需要透光，导致照射至色阻膜672上的外界光线会存在部分穿过色阻膜672，并经反射阳极631反射后从色阻膜672反射出对比显示器件，导致对比显示器件的反射率较高，导致显示效果较差。
如图7所示，阵列膜62包括金属膜621、封装膜64包括第一封装膜641、第二封装膜642和第三封装膜643，对比显示器件还包括绝缘膜681，色阻膜672包括红色色阻膜672a，图7中以外界光线661照射至红色色阻膜672a时的光路图进行说明，可以理解的是，在外界光线661照射至绿色色阻膜和蓝色色阻膜时，可以参见下述说明。
从图7中可以看到，外界光线661包括红色光线、绿色光线和蓝色光线，在穿过红色色阻膜672a时，仅有外界光线661中的红色光线穿过，外界光线661中的红色光线在依次穿过对比显示器件的各膜层后，会照射到反射阳极631和金属膜621上，然后从另一个红色色阻膜672a反射出对比显示器件，导致对比显示器件的反射率较高，导致显示效果较差。
基于上述技术问题，本申请提供一些实施例以解决上述技术问题。
在一些实施例中，所述第二子层的材料包括透明材料，所述第一子层的材料包括透明材料和非透明材料中的一种。通过使第二子层的材料包括透明材料，使得发光材料层发出的光线能够穿过第二子层到达第一子层与第二子层的交界面，从而对光线进行提取，提高显示面板的出光效率。通过第一子层和第二子层的折射率差异形成全反射面，则第一子层的材料可以为透明材料和非透明材料中的一种。
具体的，第二子层的材料包括透明有机光刻胶，第一子层的材料包括有机光刻胶。
具体的，第一子层的材料可以为非透明材料，则可以使得光线穿过第二子层后，不会穿过第一子层，避免光线向下照射至薄膜晶体管导致薄膜晶体管的电性偏移，提高薄膜晶体管的稳定性。
具体的，本申请实施例通过使第二子层的材料包括透明材料，第一子层的材料包括非透明材料，使得发光材料层发出的光线可以穿过第二子层正常出射，且通过第一子层和第二子层的配合提高出光效率，且第一子层可以防止发光材料发出的光线影响薄膜晶体管的性能，且在外界光线照射到发光功能层时，第二子层可以对光线进行吸收，减小显示面板的反射率，从而在提高显示面板的出光效果，不增加显示面板的厚度的同时，减小显示面板对光线的反射，提高显示效果。
在一些实施例中，如图8所示，所述第一子层232a的材料包括黑色材料。通过使第一子层的材料包括黑色材料，使得第一子层和第二子层形成的界面可以提高显示面板的出光效率，且第一子层可以将外界光线吸收，从而减小显示面板对外界光线的反射，提高显示效果。
具体的，第一子层的材料包括聚甲基丙烯酸树脂。
在一些实施例中，如图2、图8所示，所述第一子层232a的厚度L1大于所述第二子层232b的厚度L2。通过使第一子层的厚度大于第二子层的厚度，可以使外界光线在照射到像素电极层发生反射时，第二子层可以对更多光线进行吸收，从而进一步减小显示面板对外界光线的反射，提高显示效果。
在一些实施例中，如图8所示，所述发光功能层23还包括公共电极层234，所述第一子层232a的厚度L1大于或者等于所述像素电极层231、发光材料层233和公共电极层234的厚度之和L2。通过使第一子层的厚度大于或者等于所述像素电极层、发光材料层和公共电极层的厚度之和，使得在外界光线照射到像素电极层发生反射时，第二子层可以对更多光线进行吸收，从而进一步减小显示面板对外界光线的反射，提高显示效果。
具体的，如图10所示，可以看到外界光线661在穿过色阻入射至像素电极层231时，会被像素电极231反射，而反射光线可能会经过像素定义层，因此，在增加第一子层的厚度时，可以使更多的反射光线照射到第一子层后被第一子层吸收，从而进一步减小反射光线，提高显示效果。
具体的，在第一子层为非透明材料时，更进一步为黑色材料时，虽然第一子层和第二子层的界面仍然可以对光线进行反射，但考虑到第一子层也会对光线进行吸收，因此，对于第一子层的厚度可以根据实际光线角度进行确定，从而兼顾显示面板的出光效率和减小显示面板的反射光线的效果。
在一些实施例中，如图8所示，所述显示面板2还包括滤光层28，所述滤光层28包括多个色阻282和设置于所述色阻282之间的黑色矩阵281，所述像素定义层232与所述黑色矩阵281对应设置，且所述黑色矩阵281的边缘与所述第一子层232a的边缘存在间距。通过使显示面板包括滤光层，可以通过滤光层防止显示面板对外界光线进行反射，且显示面板的厚度相较于采用圆偏光片的显示面板的厚度较小，且通过使黑色矩阵的边缘与第一子层的边缘存在间距，可以防止黑色矩阵对发光功能层发出的光线进行遮挡，提高显示面板的出光效率。
具体的，色阻可以包括红色色阻、绿色色阻和蓝色色阻。
具体的，对于采用滤光层的显示面板，通过使像素定义层包括第一子层和第二子层，使第一子层的材料可以为黑色材料，则可以在外界光线穿过色阻时，通过第一子层对部分光线进行吸收和阻挡，且第一子层和第二子层仍然能够形成全反射面，使得发光材料层发出的光线能够出射，从而提高显示面板的出光效率，且该方案可以不增加显示面板的厚度，从而兼顾减小显示面板的厚度、提高显示面板的出光效率、降低显示面板对外界光线的反射率，提高显示效果。
在一些实施例中，如图9所示，所述黑色矩阵281的边缘与所述第二子层232b的边缘的间距L6的范围为2微米至4微米，所述第一子层232a的边缘与所述第二子层232b的边缘的间距L5的范围为1微米至3微米。通过使黑色矩阵与第二子层的边缘的间距的范围为2微米至4微米，使得显示面板发出的光线可以从黑色矩阵的开口发射出去，提高显示面板的出光效果；通过使第二子层与第一子层的边缘的间距范围为1微米至3微米，使得发光材料层发出的光线可以穿过像素定义层，从而提高显示面板的出光效果。
具体的，可以理解的是，第一子层的边缘与第二子层的边缘的间距可以为第一像素开口和第二像素开口的间距。
具体的，如图10所示，同样以色阻为红色色阻282a为例，外界光线661在照射至红色色阻282a时，绿色光线和蓝色光线无法穿过红色色阻，红色光线穿过红色色阻282a后，一部分光线会直接照射至像素电极层231，一部分光线会照射至像素定义层，在对比显示器件中，一部分光线会穿过像素定义层照射至像素电极层后发生反射，另一部分光线会穿过像素定义层后照射至金属层上发生反射，而本申请实施例中第一子层在为非透明材料，具体为黑色材料时，会直接将照射至像素定义层的光线吸收，从而减少反射出显示面板的光线，降低显示面板对外界光线的反射率，提高显示效果。
在一些实施例中，所述第一子层的材料包括丙烯酸树脂、环氧树脂、苯酚树脂、聚酰胺树脂中的一种，所述第二子层的材料包括丙烯酸树脂、环氧树脂、苯酚树脂、聚酰胺树脂中的一种。通过使第一子层和第二子层在交界面形成全反射面，且第一子层和第二子层可以采用高温制程形成，则第一子层和第二子层的材料选择较多，且性能更加稳定。
具体的，对于丙烯酸树脂、环氧树脂、苯酚树脂、聚酰胺树脂，由于上述树脂为一种树脂体系，可以通过调整各体系内的掺杂物或者基团来改变各树脂的性能，例如使得形成的第一子层不透明，但形成的第二子层透明，从而实现不同膜层的不同功能。
在一些实施例中，如图2所示，所述发光功能层23还包括公共电极层234，所述第一子层232a的厚度L1大于或等于所述第二子层232b的厚度L2，且所述像素定义层232的厚度大于所述像素电极层231、发光材料层233和公共电极层234的厚度之和L4。通过使第一子层的厚度等于第二子层的厚度，且像素定义层的厚度大于像素电极层、发光材料层和公共电极层的厚度之和，避免发光材料层溢出对应的第二像素开口，使得显示面板的均匀性较好。
具体的，上述实施例以第一子层的厚度等于第二子层的厚度为例进行说明，但本申请实施例不限于此，第一子层和第二子层的厚度可以不同。
具体的，上述实施例以像素定义层的厚度大于像素电极层、发光材料层和公共电极层的厚度之和为例进行说明，但本申请实施例不限于此，例如像素定义层的厚度可以等于像素电极层、发光材料层和公共电极层的厚度之和，使得像素定义层的厚度较小，且公共电极层的不同区域的高度差较小，避免公共电极层断裂。
具体的，第一子层的厚度范围为0.3微米至5微米。
具体的，第二子层的厚度范围为0.3微米至5微米。
具体的，如图8所示，衬底21包括第一柔性层211、第一阻挡层212、第二柔性层213和第二阻挡层214。
具体的，如图2所示，驱动电路层22包括薄膜晶体管阵列层221和平坦化层222。
具体的，如图8所示，驱动电路层22包括缓冲层271、有源层272、第一栅极绝缘层273、第一金属层274、第二栅极绝缘层275、层间绝缘层276、第一源漏极层277、第一平坦化层278、第二源漏极层279和第二平坦化层280。
具体的，薄膜晶体管阵列层221包括依次设置的缓冲层、有源层、第一栅极绝缘层、第一金属层、第二栅极绝缘层、第二金属层、层间绝缘层和源漏极层。
具体的，如图2所示，显示面板还包括封装层24和触控层25。
具体的，封装层包括第一无机层、有机层和第二无机层。
具体的，如图8所示，封装层24包括依次设置的第一无机层241、有机层242和第二无机层243。
具体的，触控层包括第一电极层、绝缘层和第二电极层。
具体的，如图8所示，触控层25包括第一绝缘层251、第一电极层252、第二绝缘层253和第二电极层254。
具体的，如图8所示，显示面板2还包括平坦层291、光学胶层292和盖板293。
上述实施例分别从各个结构对显示面板的设计进行了详细说明，可以理解的是，在各实施例不存在冲突时，可以使各实施例结合以达到更好的技术效果，例如，所述第一子层与所述像素电极层形成有第一夹角，所述第二子层与所述像素电极层形成有第二夹角，所述第一夹角等于所述第二夹角，且所述第二子层的折射率与所述第一子层的折射率的差值的范围为0.1至0.15。例如，所述第一子层的材料包括黑色材料，且所述第一像素开口的形状与所述第二像素开口的形状相同。
同时，本申请实施例提供一种显示面板的制备方法，该显示面板的制备方法包括：
提供衬底，在衬底上形成驱动电路层；该步骤对应的显示面板的结构如图4中的（a）所示；
在驱动电路层上形成像素电极层和第一子层；该步骤对应的显示面板的结构如图4中的（a）所示；
采用曝光显影工艺将第一子层进行图案化，在对应像素电极层的区域形成第一像素开口，以使像素电极层暴露；该步骤对应的显示面板的结构如图4中的（b）所示；
在第一子层上涂布形成第二子层，并使用曝光显影工艺将第二子层进行图案化，在对应像素电极层的区域形成第二像素开口，以使像素电极层暴露；该步骤对应的显示面板的结构如图4中的（c）所示；
在第二子层上依次形成发光材料层、公共电极层、封装层和触控层；该步骤对应的显示面板的结构如图2所示。
同时，本申请实施例提供一种显示装置，该显示装置包括如上述实施例任一所述的显示面板。
根据上述实施例可知：
本申请实施例提供一种显示面板和显示装置，该显示面板包括衬底、驱动电路层和发光功能层，驱动电路层设置于衬底一侧，发光功能层设置于驱动电路层远离衬底的一侧，发光功能层包括像素电极层、发光材料层和像素定义层，像素电极层设置于驱动电路层远离衬底的一侧，像素定义层设置于像素电极层远离驱动电路层的一侧，发光材料层设置于像素电极层远离驱动电路层的一侧，其中，像素定义层包括第一子层和第二子层，第一子层设置像素电极层远离驱动电路层的一侧，第一子层包括第一像素开口，第二子层设置于第一子层远离像素电极层的一侧且延伸至第一像素开口内，第二子层包括第二像素开口，发光材料层至少覆盖第二像素开口，第二子层的折射率大于第一子层的折射率。本申请通过使像素定义层包括第一子层和第二子层，且使得第二子层延伸至第一像素开口内，第二子层的折射率大于第一子层的折射率，则第一子层和第二子层的接触面会形成全反射面，使得发光材料层发出的光线在照射到第一子层和第二子层的接触面时，会被反射出显示面板，提高显示面板的出光效率，且通过像素定义层形成微结构叠层膜，无需额外增加膜层，减小了显示面板的厚度，且像素定义层形成的微结构叠层膜更靠近发光材料层，相较于外设的微结构叠层膜可以提高光提取效率，且像素定义层可以采用高温制程，材料选择性较多，性能更加稳定，成本更低。
在上述实施例中，对各个实施例的描述都各有侧重，某个实施例中没有详述的部分，可以参见其他实施例的相关描述。
以上对本申请实施例所提供的一种显示面板和显示装置进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种显示面板，其包括：
    衬底；
    驱动电路层，设置于所述衬底一侧；
    发光功能层，设置于所述驱动电路层远离所述衬底的一侧，所述发光功能层包括像素电极层、发光材料层和像素定义层，所述像素电极层设置于所述驱动电路层远离所述衬底的一侧，所述像素定义层设置于所述像素电极层远离所述驱动电路层的一侧，所述发光材料层设置于所述像素电极层远离所述驱动电路层的一侧；
    其中，所述像素定义层包括第一子层和第二子层，所述第一子层设置于所述像素电极层远离所述驱动电路层的一侧，所述第一子层包括第一像素开口，所述第二子层设置于所述第一子层远离所述像素电极层的一侧且延伸至所述第一像素开口内，所述第二子层包括第二像素开口，所述发光材料层至少覆盖所述第二像素开口，所述第二子层的折射率大于所述第一子层的折射率。
  2. 如权利要求1所述的显示面板，其中，所述第二子层的材料包括透明材料，所述第一子层的材料包括透明材料和非透明材料中的一种。
  3. 如权利要求2所述的显示面板，其中，所述第一子层的材料包括黑色材料。
  4. 如权利要求3所述的显示面板，其中，所述第一子层的厚度大于所述第二子层的厚度。
  5. 如权利要求4所述的显示面板，其中，所述发光功能层还包括公共电极层，所述第一子层的厚度大于或者等于所述像素电极层、发光材料层和公共电极层的厚度之和。
  6. 如权利要求3所述的显示面板，其中，所述显示面板还包括滤光层，所述滤光层包括多个色阻和设置于所述色阻之间的黑色矩阵，所述像素定义层与所述黑色矩阵对应设置，且所述黑色矩阵的边缘与所述第一子层的边缘存在间距。
  7. 如权利要求6所述的显示面板，其中，所述黑色矩阵的边缘与所述第二子层的边缘的间距的范围为2微米至4微米，所述第一子层的边缘与所述第二子层的边缘的间距的范围为1微米至3微米。
  8. 如权利要求1所述的显示面板，其中，所述像素电极层包括：多个阵列排布的像素电极，所述第一像素开口对应相应的所述像素电极设置，所述第二像素开口对应相应的所述第一像素开口设置，所述第二像素开口的面积小于所述第一像素开口的面积。
  9. 如权利要求8所述的显示面板，其中，所述第一像素开口的形状与所述第二像素开口的形状相同。
  10. 如权利要求8所述的显示面板，其中，所述第二子层靠近所述衬底的第一下表面与至少部分的所述第一子层远离所述衬底的第二上表面接触，并与至少部分的所述像素电极远离所述衬底的第三上表面接触。
  11. 如权利要求1所述的显示面板，其中，所述第一子层与所述像素电极层形成有第一夹角，所述第二子层与所述像素电极层形成有第二夹角，所述第一夹角大于或等于所述第二夹角。
  12. 如权利要求11所述的显示面板，其中，所述第一夹角的取值范围为20度至60度。
  13. 如权利要求1所述的显示面板，其中，所述第一子层的折射率的范围为1.4至1.55，所述第二子层的折射率的范围为1.55至1.85。
  14. 如权利要求13所述的显示面板，其中，所述第二子层的折射率与所述第一子层的折射率的差值的范围为0.1至0.15。
  15. 如权利要求1所述的显示面板，其中，所述发光功能层还包括公共电极层，所述第一子层的厚度大于或等于所述第二子层的厚度，且所述像素定义层的厚度大于所述像素电极层、发光材料层和公共电极层的厚度之和。
  16. 如权利要求1所述的显示面板，其中，所述像素电极层包括：多个阵列排布的像素电极，所述第一像素开口对应相应的所述像素电极设置，所述第二像素开口对应相应的所述第一像素开口设置，所述第二像素开口的面积小于所述第一像素开口的面积，所述第二像素开口在所述衬底上的投影位于所述第一像素开口在所述衬底上的投影内，所述第二像素开口与所述第一像素开口的间距的范围为2至4微米。
  17. 一种显示装置，其包括显示面板，所述显示面板包括：
    衬底；
    驱动电路层，设置于所述衬底一侧；
    发光功能层，设置于所述驱动电路层远离所述衬底的一侧，所述发光功能层包括像素电极层、发光材料层和像素定义层，所述像素电极层设置于所述驱动电路层远离所述衬底的一侧，所述像素定义层设置于所述像素电极层远离所述驱动电路层的一侧，所述发光材料层设置于所述像素电极层远离所述驱动电路层的一侧；
    其中，所述像素定义层包括第一子层和第二子层，所述第一子层设置于所述像素电极层远离所述驱动电路层的一侧，所述第一子层包括第一像素开口，所述第二子层设置于所述第一子层远离所述像素电极层的一侧且延伸至所述第一像素开口内，所述第二子层包括第二像素开口，所述发光材料层至少覆盖所述第二像素开口，所述第二子层的折射率大于所述第一子层的折射率。
  18. 如权利要求17所述的显示装置，其中，所述第二子层的材料包括透明材料，所述第一子层的材料包括透明材料和非透明材料中的一种。
  19. 如权利要求18所述的显示装置，其中，所述第一子层的材料包括黑色材料。
  20. 如权利要求19所述的显示装置，其中，所述第一子层的厚度大于所述第二子层的厚度。
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