WO2023206127A1 - 显示装置及显示面板 - Google Patents

显示装置及显示面板 Download PDF

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Publication number
WO2023206127A1
WO2023206127A1 PCT/CN2022/089506 CN2022089506W WO2023206127A1 WO 2023206127 A1 WO2023206127 A1 WO 2023206127A1 CN 2022089506 W CN2022089506 W CN 2022089506W WO 2023206127 A1 WO2023206127 A1 WO 2023206127A1
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WO
WIPO (PCT)
Prior art keywords
light
substrate
area
display panel
reflective
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PCT/CN2022/089506
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English (en)
French (fr)
Inventor
石博
谢涛峰
Original Assignee
京东方科技集团股份有限公司
成都京东方光电科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 成都京东方光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to PCT/CN2022/089506 priority Critical patent/WO2023206127A1/zh
Priority to CN202280000997.3A priority patent/CN117561605A/zh
Publication of WO2023206127A1 publication Critical patent/WO2023206127A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components having potential barriers, specially adapted for light emission
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/36—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes
    • H01L33/38—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the electrodes with a particular shape

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display device and a display panel.
  • OLED Organic Light Emitting Diode, organic electroluminescent diode
  • OLED Organic Light Emitting Diode, organic electroluminescent diode
  • current OLED display devices have a problem of low light extraction efficiency.
  • the purpose of this disclosure is to provide a display device and a display panel that can improve light extraction efficiency.
  • a display panel including:
  • a light-emitting unit provided on the substrate
  • a reflective structure is provided on the light-emitting side of the light-emitting unit, the reflective structure includes a first surface, a second surface that are oppositely arranged, and a reflective side surface connected between the first surface and the second surface;
  • the first surface faces the light-emitting unit, and the second surface is provided on the side of the first surface facing away from the light-emitting unit;
  • the reflective side includes an inclined area, and the inclined area has a step structure;
  • a light-transmitting structure is provided on the light-emitting side of the light-emitting unit and covers at least the inclined area.
  • the refractive index of the reflective structure is smaller than the refractive index of the light-transmitting structure.
  • the inclined area includes a plurality of inclined areas, and the plurality of inclined areas are distributed along the thickness direction of the substrate; the plurality of inclined areas include at least a first inclined area and a second inclined area, and the plurality of inclined areas includes at least a first inclined area and a second inclined area.
  • the second inclined region is located on the side of the first inclined region away from the light-emitting unit, and the angle between the second inclined region and the substrate is smaller than the angle between the first inclined region and the substrate. ; Wherein, in a direction parallel to the substrate, the second inclined area is located inside the first inclined area, so that the inclined area forms the step structure.
  • the included angle between the second inclined area and the substrate is greater than or equal to 30° and less than or equal to 60°, and the included angle between the first inclined area and the substrate is greater than or equal to 45° and less than 90°.
  • the reflective structure includes a first reflective layer and a second reflective layer.
  • the first reflective layer includes the first inclined area
  • the second reflective layer includes the second inclined area
  • the first reflective layer includes the first inclined area.
  • the material of the reflective layer is the same as the material of the second reflective layer.
  • the refractive index of the reflective structure is 1.4-1.55; and/or
  • the refractive index of the light-transmitting structure is 1.6-1.75.
  • the inclined area includes a plurality of inclined areas, and the plurality of inclined areas are distributed along the thickness direction of the substrate; the plurality of inclined areas include at least a first inclined area and a second inclined area, and the plurality of inclined areas includes at least a first inclined area and a second inclined area.
  • the second tilted area is located on the side of the first tilted area away from the light-emitting unit, and the angle between the second tilted area and the substrate is equal to the angle between the first tilted area and the substrate. ; Wherein, in a direction parallel to the substrate, the second inclined area is located inside the first inclined area, so that the inclined area forms the step structure;
  • the reflective structure includes a first reflective layer and a second reflective layer.
  • the first reflective layer includes the first inclined area
  • the second reflective layer includes the second inclined area
  • the first reflective layer includes the first inclined area.
  • the refractive index is greater than the refractive index of the second reflective layer.
  • an angle between the second inclined region and the substrate is greater than or equal to 45° and less than 90°.
  • the refractive index of the first reflective layer is 1.5-1.55
  • the refractive index of the second reflective layer is 1.4-1.45;
  • the refractive index of the light-transmitting structure is 1.6-1.75.
  • the distance between the second inclined area and the first inclined area is 0.5 ⁇ m-6 ⁇ m.
  • the display panel also includes:
  • a pixel defining layer is provided on the substrate and is provided with a pixel opening, and the light-emitting unit is provided in the pixel opening;
  • the orthographic projection of the pixel opening on the substrate is located within the orthographic projection area of the light-transmitting structure on the substrate, and the orthographic projection of the reflective structure on the substrate is located on the pixel
  • the defining layer is within an orthographic projection area on the substrate.
  • the display panel also includes:
  • a pixel defining layer is provided on the substrate and is provided with a pixel opening, and the light-emitting unit is provided in the pixel opening;
  • At least part of the area of the orthographic projection of the reflective structure on the substrate is located within the area of the orthographic projection of the pixel opening on the substrate.
  • the display panel also includes:
  • a pixel defining layer is provided on the substrate and is provided with a pixel opening, and the light-emitting unit is provided in the pixel opening;
  • the reflective structure includes a first part and a second part in a direction parallel to the substrate, and an orthographic projection of the first part on the substrate surrounds an orthographic projection of the second part on the substrate.
  • Orthographic projection the orthographic projection of the first part on the substrate surrounds the orthographic projection of the pixel opening on the substrate, and at least part of the orthographic projection of the second part on the substrate is located The pixel opening is within an orthographic projection area on the substrate.
  • the second part has a strip structure and extends in a direction parallel to the substrate.
  • the light-transmitting structure is provided with a recessed portion on one side, and the side of the light-transmitting structure provided with the recessed portion faces the light-emitting unit or faces away from the light-emitting unit, and the reflective structure is provided on The recessed portion.
  • the display panel also includes:
  • the encapsulating layer is provided on one side of the light-emitting unit, and the light-transmitting structure is provided on the side of the encapsulating layer facing away from the light-emitting unit, or the light-transmitting structure is provided on the encapsulating layer and the light-emitting unit. between.
  • a display device including the display panel.
  • the reflective side of the reflective structure includes an inclined area, and the light-transmitting structure at least covers the inclined area.
  • the emitted light of the display panel under a large viewing angle is incident from the light-transmitting structure into the inclined area, The outgoing light is reflected, changing the outgoing light of the display panel at a wide viewing angle into the outgoing light at a narrow viewing angle, avoiding total reflection of the outgoing light on the light emitting surface of the display panel, reducing the waste of light and improving the light emitting efficiency; another
  • the refractive index of the reflective structure is smaller than the refractive index of the light-transmitting structure, the present disclosure can adjust the angle of the inclined area so that the outgoing light is totally reflected in the inclined area, thereby further avoiding the waste of light and improving the light extraction efficiency.
  • FIG. 1 is a schematic diagram of a display panel in the related art.
  • FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present disclosure.
  • Figure 3 is a schematic diagram of a reflective structure according to an embodiment of the present disclosure.
  • FIG. 4 is another schematic diagram of a display panel according to an embodiment of the present disclosure.
  • FIG. 5 is another schematic diagram of a display panel according to an embodiment of the present disclosure.
  • Figure 6 is a schematic diagram of a pixel definition layer according to an embodiment of the present disclosure.
  • FIG. 7-9 are schematic views of the second part of the reflective structure and the pixel opening according to the embodiment of the present disclosure.
  • a display panel includes a substrate 1 , a light-emitting structure 2 and a glass cover 3 .
  • the light-emitting structure 2 is arranged on the substrate 1
  • the glass cover 3 is arranged on the side of the light-emitting structure 2 facing away from the substrate 1 .
  • the light-emitting structure 2 may include a light-emitting unit, a packaging layer, etc.
  • the light-emitting surface of the display panel is the surface of the glass cover 3 away from the substrate 1 . When the light reaches the light exit surface of the display panel, the light L1 exits normally.
  • the refractive index of the glass cover 3 is greater than the refractive index of the external environment (air), the incident angle of the light L2 is equal to or greater than the critical angle of total reflection, and the light L2 will occur. Total internal reflection results in low overall light extraction efficiency.
  • the refractive index of the light-emitting structure 2 is also greater than the refractive index of the glass cover 3, when the light L3 is incident on the interface between the light-emitting structure 2 and the glass cover 3, if the incident angle is equal to or greater than the critical angle of total reflection, the light L3 will also Total internal reflection occurs.
  • the display panel may include a substrate 1, a light-emitting unit 9, a light-transmitting structure 5 and a reflective structure 4, where:
  • the light-emitting unit 9 is provided on the substrate 1 .
  • the reflective structure 4 is provided on the light emitting side of the light emitting unit 9 .
  • the reflective structure 4 includes a first surface 43 , a second surface 44 that are oppositely arranged, and a reflective side surface connected between the first surface 43 and the second surface 44 .
  • the first surface 43 faces the light-emitting unit 9
  • the second surface 44 is provided on a side of the first surface 43 facing away from the light-emitting unit 9 .
  • the reflective side includes a sloped area 40 .
  • the inclined area 40 has a step structure.
  • the light-transmitting structure 5 is provided on the light-emitting side of the light-emitting unit 9 and covers at least the inclined area 40 .
  • the refractive index of the reflective structure 4 is smaller than the refractive index of the light-transmitting structure 5 .
  • the reflective side of the reflective structure 4 includes an inclined area 40, and the light-transmitting structure 5 at least covers the inclined area 40.
  • the emitted light of the display panel under a wide viewing angle is incident from the light-transmitting structure 5.
  • the outgoing light is reflected, so that the outgoing light of the display panel at a wide viewing angle is changed to the outgoing light at a narrow viewing angle, avoiding total reflection of the outgoing light on the light emitting surface of the display panel, reducing the waste of light, and improving the efficiency of the display panel.
  • the present disclosure can further avoid the waste of light by adjusting the angle of the inclined area 40 so that the outgoing light is totally reflected in the inclined area 40. , to improve light extraction efficiency.
  • the substrate 1 may be a rigid substrate.
  • the rigid substrate may be a glass substrate or a PMMA (Polymethyl methacrylate) substrate.
  • the substrate 1 can also be a flexible substrate.
  • the flexible substrate can be a PET (Polyethylene terephthalate, polyethylene terephthalate) substrate, PEN (Polyethylene naphthalate two formic acid glycol ester, polyethylene naphthalate) substrate or PI ( Polyimide (polyimide) substrate.
  • the display panel may further include a driving circuit layer 6 provided on the substrate 1 .
  • the driver circuit layer 6 may include driver transistors.
  • the driving transistor may be a thin film transistor, but the embodiments of the present disclosure are not limited thereto.
  • the thin film transistor may be a top gate thin film transistor, and of course, the thin film transistor may also be a bottom gate thin film transistor.
  • the thin film transistor may include an active layer, a gate insulating layer, a gate electrode, an interlayer insulating layer, a source electrode, and a drain electrode.
  • the active layer can be provided on the substrate 1 .
  • the gate insulating layer can be disposed on the substrate 1 and cover the active layer.
  • the gate electrode may be disposed on a side of the gate insulating layer away from the substrate 1 .
  • the interlayer insulating layer may be provided on the gate insulating layer and cover the gate electrode.
  • the source and drain electrodes may be disposed on the interlayer insulating layer and connected to the active layer via via holes passing through the interlayer insulating layer and the gate insulating layer.
  • the display panel of the present disclosure may further include a planarization layer 7 and a pixel definition layer 8 .
  • the planarization layer 7 can cover the source electrode, drain electrode and interlayer insulating layer of the thin film transistor.
  • the pixel definition layer 8 can be disposed on a side of the planarization layer 7 facing away from the substrate 1 . As shown in FIG. 6 , the pixel defining layer 8 may be provided with pixel openings 81 . The number of the pixel openings 81 may be multiple.
  • the light-emitting unit 9 is provided on the substrate 1 .
  • the light-emitting unit 9 can be provided in the pixel opening 81 .
  • the number of the light-emitting units 9 can also be multiple, and the plurality of light-emitting units 9 are provided in the plurality of pixel openings 81 in one-to-one correspondence.
  • the plurality of light-emitting units 9 may include red light-emitting units, green light-emitting units and blue light-emitting units.
  • Each light-emitting unit 9 may include an anode layer 91 , a light-emitting material layer 92 and a cathode layer 93 .
  • the anode layer 91 can be disposed on the planarization layer 7 exposed by the pixel opening 81 , the cathode layer 93 can be disposed on the side of the anode layer 91 facing away from the substrate 1 , and the luminescent material layer 92 can be disposed between the anode layer 91 and the cathode. between layers 93.
  • the luminescent material layer 92 may be an organic electroluminescent material layer, but the embodiments of the present disclosure are not limited thereto.
  • the anode layer 91 may be electrically connected to the source or drain of the thin film transistor via a via hole passing through the planarization layer 7 .
  • the encapsulation layer 10 can be provided on one side of the light-emitting unit 9 and the pixel definition layer 8 .
  • the encapsulation layer 10 may be a thin film encapsulation layer (TFE), but this is not particularly limited in the embodiment of the present disclosure.
  • TFE thin film encapsulation layer
  • the light-emitting side of the light-emitting unit 9 can be the side of the light-emitting unit 9 facing the substrate 1.
  • the substrate 1 needs to be a transparent substrate or a light-transmitting substrate.
  • the light-emitting side of the light-emitting unit 9 can also be It is the side of the light-emitting unit 9 facing away from the substrate 1 .
  • the reflective structure 4 is provided on the light emitting side of the light emitting unit 9 .
  • the reflective structure 4 can be provided on the side of the pixel defining layer 8 facing away from the substrate 1 .
  • the reflective structure 4 can be disposed on the side of the encapsulation layer 10 facing away from the substrate 1 .
  • the reflective structure 4 can also be disposed between the encapsulation layer 10 and the pixel defining layer 8 .
  • the reflective structure 4 includes a first surface 43, a second surface 44 and reflective side surfaces.
  • the first surface 43 and the second surface 44 are arranged oppositely, and the reflective side is connected between the first surface 43 and the second surface 44 .
  • the first surface 43 faces the light-emitting unit 9
  • the second surface 44 is provided on a side of the first surface 43 facing away from the light-emitting unit 9 .
  • the first surface 43 may be parallel or approximately parallel to the substrate 1 .
  • the second surface 44 may be parallel or approximately parallel to the substrate 1 .
  • the reflective side includes a sloped area 40 .
  • the inclined region 40 is inclined in a direction perpendicular to the substrate 1 , and the angle between the inclined region 40 and the substrate 1 is an acute angle, that is, the slope angle of the inclined region 40 is an acute angle.
  • the angle between the inclined region 40 and the substrate 1 may be greater than or equal to 30° and less than 90°.
  • the refractive index of the reflective structure 4 can be 1.4-1.55, such as 1.4, 1.45, 1.5, 1.55, etc.
  • the inclined area 40 may include multiple inclined areas, and the multiple inclined areas are distributed along the thickness direction of the substrate 1 .
  • the angles between the multiple inclined areas and the substrate 1 may be equal, or of course may not be equal.
  • the reflective structure 4 may include a plurality of reflective layers in a direction perpendicular to the substrate 1 , and the side surfaces of each reflective layer constitute a part of the reflective side surfaces.
  • the thickness of the reflective layer can be 1 ⁇ m-3 ⁇ m, such as 1 ⁇ m, 2 ⁇ m, 3 ⁇ m, etc.
  • the cross-sectional area of the reflective layer gradually increases along the direction approaching the light-emitting unit 9, so that the side surface of the reflective layer can form the above-mentioned inclined area. As shown in FIG.
  • the above-mentioned plurality of inclined areas include at least a first inclined area 401 and a second inclined area 402 .
  • the second inclined area 402 may be located on a side of the first inclined area 401 away from the light-emitting unit 9 .
  • the above-mentioned plurality of reflective layers include at least a first reflective layer 41 and a second reflective layer 42.
  • the second reflective layer 42 is located on the side of the first reflective layer 41 away from the light-emitting unit 9.
  • the side surface of the first reflective layer 41 constitutes
  • the side surfaces of the first inclined area 401 and the second reflective layer 42 constitute the second inclined area 402 .
  • the second inclined area 402 can be located inside the first inclined area 401 , that is, the distance between the second inclined area 402 and the reflective structure 4 is smaller than the distance between the first inclined area 401 and the reflective structure 4 distance.
  • the distance between the second inclined area 402 and the first inclined area 401 is greater than zero in a direction parallel to the substrate 1 , so that the inclined area 40 forms the above-mentioned step structure. Specifically, as shown in FIG.
  • the distance d between the second tilted area 402 and the first tilted area 401 in the direction parallel to the substrate 1 may be 0.5 ⁇ m-6 ⁇ m, such as 0.5 ⁇ m, 1 ⁇ m, 1.5 ⁇ m, or 2 ⁇ m. , 3 ⁇ m, 4 ⁇ m, 5 ⁇ m, 6 ⁇ m, etc.
  • the angle ⁇ between the second inclined region 402 and the substrate 1 is smaller than the angle ⁇ between the first inclined region 401 and the substrate 1 , where the angle ⁇ between the second inclined region 402 and the substrate 1 is smaller than the angle ⁇ between the first inclined region 401 and the substrate 1 .
  • the angle ⁇ between the second tilt area 402 and the substrate 1 is greater than or equal to 30° and less than or equal to 60°, such as 30°, 45°, 50°, 60°, etc.; the angle ⁇ between the first tilt area 401 and the substrate 1 Greater than 45° and equal to and less than 90°, such as 45°, 55°, 72°, 80°, etc.
  • the angle ⁇ between the second tilted area 402 and the substrate 1 is smaller than the angle ⁇ between the first tilted area 401 and the substrate 1, the incident angle of light from a farther emission position to the second tilted area 402 can be increased. The amount of light that undergoes total reflection is increased, thereby improving the light extraction efficiency.
  • the angle ⁇ between the second tilt area 402 and the substrate 1 is equal to the angle ⁇ between the first tilt area 401 and the substrate 1
  • the angle between the second tilt area 402 and the substrate 1 ⁇ is greater than or equal to 45° and less than 90°, such as 45°, 55°, 70°, 80°, etc.
  • the angle ⁇ between the second inclined region 402 and the substrate 1 when the angle ⁇ between the first inclined region 401 and the substrate 1 is smaller than the angle ⁇ between the first inclined region 401 and the substrate 1 , the refractive index of the second reflective layer 42 can be smaller than the refractive index of the first reflective layer 41 .
  • the refractive index of the second reflective layer 42 can also be equal to The refractive index of the first reflective layer 41 , for example, the refractive index of the second reflective layer 42 and the refractive index of the first reflective layer 41 are both 1.4-1.55, but the disclosure is not limited thereto, and the refractive index of the second reflective layer 42 is also 1.4-1.55. It may be greater than the refractive index of the first reflective layer 41 .
  • the material of the second reflective layer 42 may be the same as the material of the first reflective layer 41 , or of course, may be different.
  • the refractive index of the second reflective layer 42 may be smaller than the refractive index of the first reflective layer 41,
  • the refractive index of the second reflective layer 42 is 1.4-1.45 and the refractive index of the first reflective layer 41 is 1.5-1.55.
  • the critical angle of total reflection is also smaller, which increases the number of total reflection rays and improves the light extraction gain.
  • the orthographic projection of the reflective structure 4 on the substrate 1 may be located within the orthographic projection area of the pixel defining layer 8 on the substrate 1 .
  • at least part of the area of the orthographic projection of the reflective structure 4 on the substrate 1 may be located within the area of the orthographic projection of the pixel opening 81 on the substrate 1 .
  • the reflective structure 4 in a direction parallel to the substrate 1 , may include a first part 100 and a second part 200 , and the orthographic projection of the first part 100 on the substrate 1 surrounds the second part 100 .
  • the pixel definition layer 8 is within the orthographic projection area on the substrate 1 , and at least part of the orthographic projection area of the second portion 200 on the substrate 1 is located within the orthographic projection area of the pixel opening 81 on the substrate 1 .
  • the reflective structure 4 of the present disclosure may also include only the second part 200 without providing the first part 100 , that is, the orthographic projection of the reflective structure 4 on the substrate 1 is located at the pixel opening 81 on the substrate 1 within the orthographic projection area.
  • the number of the second parts 200 may be one, two, three, four or more.
  • the second part 200 may have a strip structure and extend in a direction parallel to the substrate 1.
  • the second part 200 of the strip structure may be in a straight line or a polygonal shape. Of course, it may also be in a curved shape, such as a wavy line. As shown in FIG.
  • the three second parts 200 may divide the pixel opening 81 into three areas, wherein the three second parts 200 may equally divide the pixel opening 81 into three areas.
  • the distance d between the second inclined area 402 and the first inclined area 401 of the first part 100 may be 2 ⁇ m-6 ⁇ m.
  • the distance d between the second inclined area 402 and the first inclined area 401 of the second part 200 may be 0.5 ⁇ m-1.5 ⁇ m.
  • the width of the first reflective layer 41 in the second part 200 of the strip-shaped structure may be 4 ⁇ m-6 ⁇ m, and the width of the second reflective layer 42 of the second part 200 of the strip-shaped structure may be 3 ⁇ m-5 ⁇ m.
  • the light-transmitting structure 5 is provided on the light-emitting side of the light-emitting unit 9 .
  • the light-transmitting structure 5 can be provided on the side of the pixel defining layer 8 facing away from the substrate 1 .
  • the light-transmitting structure 5 can be disposed on the side of the encapsulating layer 10 facing away from the substrate 1 .
  • the light-transmitting structure 5 can also be disposed between the encapsulating layer 10 and the pixel defining layer 8 .
  • the material of the light-transmitting structure 5 may include ink, photoresist, etc.
  • the light-transmitting structure 5 covers at least the inclined area 40 of the reflective structure 4 .
  • a recessed portion may be provided on one side of the light-transmitting structure 5 .
  • the recessed portion can be provided on the side of the light-transmitting structure 5 facing the light-emitting unit 9 .
  • the recessed portion can be provided on the side of the light-transmitting structure 5 facing away from the light-emitting unit 9 .
  • the above-mentioned reflective structure 4 can be provided in the recessed portion.
  • the reflective structure 4 may or may not extend out of the recessed portion.
  • the recessed portion may also penetrate the light-transmitting structure 5 in a direction perpendicular to the substrate 1 .
  • the light-transmitting structure 5 can wrap the reflective structure 4 .
  • the refractive index of the light-transmitting structure 5 is greater than the refractive index of the reflective structure 4 .
  • the refractive index of the light-transmitting structure 5 can be 1.6-1.75, such as 1.6, 1.65, 1.7, 1.75, etc.
  • the present disclosure sets the refractive index of the reflective structure 4 to be smaller than the refractive index of the light-transmitting structure 5, thereby making the present invention It is disclosed that total reflection of light can be achieved by adjusting the incident angle of light to reduce energy loss and improve light extraction efficiency.
  • the light-transmitting structure 5 may include a first structural surface and a second structural surface that are oppositely arranged, and the first structural surface is provided between the second structural surface and the light-emitting unit 9 .
  • the first structural surface can be flush with the first surface 43 of the reflective structure 4 .
  • the first structural surface can be staggered from the first surface 43 .
  • the first structural surface can be disposed far away from or close to the first surface 43 of the light-emitting unit 9 side.
  • the second structural surface can be flush with the second surface 44 of the reflective structure 4 .
  • the second structural surface can be staggered from the second surface 44 .
  • the second structural surface can be disposed far away from or close to the second surface 44 of the light-emitting unit 9 side.
  • the refractive index of the first reflective layer 41 and the refractive index of the second reflective layer 42 are set to be equal, and the angle between the first inclined area 401 of the first reflective layer 41 and the substrate 1 is 55°.
  • the angle between the second inclined area 402 of the second reflective layer 42 and the substrate 1 is 45°.
  • the light extraction gain of Test Example 1 can be increased by 17.1%.
  • the difference between Test Example 2 is that the refractive index of the first reflective layer 41 and the second reflective layer 42 are set to be different.
  • the refractive index of the first reflective layer 41 is 1.5
  • the refractive index of the second reflective layer 42 is 1.5
  • the refractive index of 42 is 1.4
  • the angle between the first inclined region 401 and the substrate 1 is equal to the angle between the second inclined region 402 and the substrate 1 .
  • the light extraction gain of Test Example 2 can be increased by 17.3%.
  • An embodiment of the present disclosure also provides a display device.
  • the display device may include the display panel described in any of the above embodiments.
  • the display device can be a mobile phone, a tablet computer, a television, etc. Since the display panel included in the display device according to the embodiment of the present disclosure is the same as the display panel in the above embodiment of the display panel and has the same beneficial effects, the details will not be described again here.

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Abstract

一种显示装置及显示面板。显示面板包括：衬底（1）；发光单元（9），设于衬底（1）上；反光结构（4），设于发光单元（9）的出光侧，反光结构（4）包括相对设置的第一表面（43）、第二表面（44）以及连接于第一表面（43）和第二表面（44）之间的反光侧面；第一表面（43）面向发光单元（9），第二表面（44）设于第一表面（43）背向发光单元（9）的一侧；反光侧面包括倾斜区域（40），倾斜区域（40）具有台阶结构；透光结构（5），设于发光单元（9）的出光侧，且至少覆盖倾斜区域（40），反光结构（4）的折射率小于透光结构（5）的折射率。能够提高显示面板的出光效率。

Description

显示装置及显示面板 技术领域
本公开涉及显示技术领域，尤其涉及一种显示装置及显示面板。
背景技术
OLED(Organic Light Emitting Diode，有机电致发光二极管)显示装置由于具有全固态结构、自发光、响应速度快、亮度高、全视角、可柔性显示等一系列优点，因而成为目前极具竞争力和良好发展前景的一类显示装置。然而，目前的OLED显示装置存在出光效率较低的问题。
发明内容
本公开的目的在于提供一种显示装置及显示面板，能够提高出光效率。
根据本公开的一个方面，提供一种显示面板，包括：
衬底；
发光单元，设于所述衬底上；
反光结构，设于所述发光单元的出光侧，所述反光结构包括相对设置的第一表面、第二表面以及连接于所述第一表面和所述第二表面之间的反光侧面；所述第一表面面向所述发光单元，所述第二表面设于所述第一表面背向所述发光单元的一侧；所述反光侧面包括倾斜区域，所述倾斜区域具有台阶结构；
透光结构，设于所述发光单元的出光侧，且至少覆盖所述倾斜区域，所述反光结构的折射率小于所述透光结构的折射率。
进一步地，所述倾斜区域包括多个倾斜区，多个所述倾斜区沿着所述衬底的厚度方向分布；多个所述倾斜区至少包括第一倾斜区和第二倾斜区，所述第二倾斜区位于所述第一倾斜区远离所述发光单元的一侧，且所述第二倾斜区与所述衬底的夹角小于所述第一倾斜区与所述衬底的夹角；其中，在与所述衬底平行的方向上，所述第二倾斜区位于所述第一倾斜区的内侧，以使所述倾斜区域形成所述台阶结构。
进一步地，所述第二倾斜区与所述衬底的夹角大于等于30°且小于等于60°，所述第一倾斜区与所述衬底的夹角大于等于45°且小于90°。
进一步地，所述反光结构包括第一反光层和第二反光层，所述第一反光层包括所述第一倾斜区，所述第二反光层包括所述第二倾斜区，所述第一反光层的材料和所述第二反光层的材料相同。
进一步地，所述反光结构的折射率为1.4-1.55；和/或
所述透光结构的折射率为1.6-1.75。
进一步地，所述倾斜区域包括多个倾斜区，多个所述倾斜区沿着所述衬底的厚度方向分布；多个所述倾斜区至少包括第一倾斜区和第二倾斜区，所述第二倾斜区位于所述第一倾斜区远离所述发光单元的一侧，且所述第二倾斜区与所述衬底的夹角等于所述第一倾斜区与所述衬底的夹角；其中，在与所述衬底平行的方向上，所述第二倾斜区位于所述第一倾斜区的内侧，以使所述倾斜区域形成所述台阶结构；
所述反光结构包括第一反光层和第二反光层，所述第一反光层包括所述第一倾斜区，所述第二反光层包括所述第二倾斜区，所述第一反光层的折射率大于所述第二反光层的折射率。
进一步地，所述第二倾斜区与所述衬底的夹角大于等于45°且小于90°。
进一步地，所述第一反光层的折射率为1.5-1.55，所述第二反光层的折射率为1.4-1.45；和/或
所述透光结构的折射率为1.6-1.75。
进一步地，在与所述衬底平行的方向上，所述第二倾斜区与所述第一倾斜区的距离为0.5μm-6μm。
进一步地，所述显示面板还包括：
像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
其中，所述像素开口在所述衬底上的正投影位于所述透光结构在所述衬底上的正投影区域内，所述反光结构在所述衬底上的正投影位于所述像素界定层在所述衬底上的正投影区域内。
进一步地，所述显示面板还包括：
像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
其中，所述反光结构在所述衬底上的正投影的至少部分区域位于所述像素开口在所述衬底上的正投影区域内。
进一步地，所述显示面板还包括：
像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
其中，在平行于所述衬底的方向上所述反光结构包括第一部分和第二部分，所述第一部分在所述衬底上的正投影围绕所述第二部分在所述衬底上的正投影，所述第一部分在所述衬底上的正投影围绕所述像素开口在所述衬底上的正投影，所述第二部分在所述衬底上的正投影的至少部分区域位于所述像素开口在所述衬底上的正投影区域内。
进一步地，所述第二部分呈条形结构，且沿着与所述衬底平行的方向延伸。
进一步地，所述透光结构的一侧设有凹陷部，且所述透光结构设有所述凹陷部的一侧面向所述发光单元或背向所述发光单元，所述反光结构设于所述凹陷部。
进一步地，所述显示面板还包括：
封装层，设于所述发光单元的一侧，所述透光结构设于所述封装层背向所述发光单元的一侧或所述透光结构设于所述封装层与所述发光单元之间。
根据本公开的一个方面，提供一种显示装置，包括所述的显示面板。
本公开的显示面板及显示装置，反光结构的反光侧面包括倾斜区域，透光结构至少覆盖倾斜区域，一方面，处于大视角下的显示面板的出射光从透光结构射入到倾斜区域时，出射光发生反射，使显示面板处于大视角下的出射光改变为窄视角下的出射光，避免出射光在显示面板的出光面发生全反射，降低了光线的浪费，提高了出光效率；另一方面，由于反光结构的折射率小于透光结构的折射率，本公开可以通过调整倾斜区域的角度以使出射光在倾斜区域发生全反射，进一步避免光线的浪费，以提高出光效率。
附图说明
图1是相关技术中的显示面板的发光示意图。
图2是本公开实施方式的显示面板的示意图。
图3是本公开实施方式的反光结构的示意图。
图4是本公开实施方式的显示面板的另一示意图。
图5是本公开实施方式的显示面板的又一示意图。
图6是本公开实施方式的像素界定层的示意图。
图7-图9是本公开实施方式的反光结构的第二部分与像素开口的示意 图。
附图标记说明：1、衬底；2、发光结构；3、玻璃盖板；4、反光结构；40、倾斜区域；401、第一倾斜区；402、第二倾斜区；41、第一反光层；42、第二反光层；43、第一表面；44、第二表面；5、透光结构；6、驱动电路层；7、平坦化层；8、像素界定层；81、像素开口；9、发光单元；91、阳极层；92、发光材料层；93、阴极层；10、封装层；100、第一部分；200、第二部分。
具体实施方式
这里将详细地对示例性实施方式进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施方式中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置的例子。
在本公开使用的术语是仅仅出于描述特定实施方式的目的，而非旨在限制本公开。除非另作定义，本公开使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开说明书以及权利要求书中使用的“第一”“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“多个”或者“若干”表示两个及两个以上。除非另行指出，“前部”、“后部”、“下部”和/或“上部”等类似词语只是为了便于说明，而并非限于一个位置或者一种空间定向。“包括”或者“包含”等类似词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而且可以包括电性的连接， 不管是直接的还是间接的。在本公开说明书和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
相关技术中，如图1所示，显示面板包括衬底1、发光结构2以及玻璃盖板3。发光结构2设于衬底1上，玻璃盖板3设于发光结构2背向衬底1的一侧。该发光结构2可以包括发光单元、封装层等。该显示面板的出光面为玻璃盖板3远离衬底1的表面。在光线到达显示面板的出光面时，光线L1正常出射，由于玻璃盖板3的折射率大于外界环境(空气)的折射率，光线L2的入射角等于或大于全反射临界角，光线L2会发生全内反射，造成整体出光效率低。此外，由于发光结构2的折射率也大于玻璃盖板3的折射率，光线L3在入射至发光结构2与玻璃盖板3的界面时，若入射角等于或大于全反射临界角时，也会发生全内反射。
本公开实施方式提供一种显示面板。如图2和图3所示，该显示面板可以包括衬底1、发光单元9、透光结构5以及反光结构4，其中：
该发光单元9设于衬底1上。该反光结构4设于发光单元9的出光侧。该反光结构4包括相对设置的第一表面43、第二表面44以及连接于第一表面43和第二表面44之间的反光侧面。该第一表面43面向发光单元9，该第二表面44设于第一表面43背向发光单元9的一侧。该反光侧面包括倾斜区域40。该倾斜区域40具有台阶结构。该透光结构5设于发光单元9的出光侧，且至少覆盖倾斜区域40。该反光结构4的折射率小于透光结构5的折射率。
本公开实施方式的显示面板，反光结构4的反光侧面包括倾斜区域40，透光结构5至少覆盖倾斜区域40，一方面，处于大视角下的显示面板的出射光从透光结构5射入到倾斜区域40时，出射光发生反射，使显示面板处于大视角下的出射光改变为窄视角下的出射光，避免出射光在显示面板的出光面发生全反射，降低了光线的浪费，提高了出光效率；另一方面，由于反光结 构4的折射率小于透光结构5的折射率，本公开可以通过调整倾斜区域40的角度以使出射光在倾斜区域40发生全反射，进一步避免光线的浪费，以提高出光效率。
下面对本公开实施方式的显示面板的各部分进行详细说明：
如图2所示，该衬底1可以为刚性衬底。其中，该刚性衬底可以为玻璃衬底或PMMA(Polymethyl methacrylate，聚甲基丙烯酸甲酯)衬底等。当然，该衬底1还可以为柔性衬底。其中，该柔性衬底可以为PET(Polyethylene terephthalate，聚对苯二甲酸乙二醇酯)衬底、PEN(Polyethylene naphthalate two formic acid glycol ester，聚萘二甲酸乙二醇酯)衬底或PI(Polyimide，聚酰亚胺)衬底。
如图2所示，该显示面板还可以包括设于衬底1上的驱动电路层6。该驱动电路层6可以包括驱动晶体管。该驱动晶体管可以为薄膜晶体管，但本公开实施方式不限于此。该薄膜晶体管可以为顶栅型薄膜晶体管，当然，该薄膜晶体管还可以为底栅型薄膜晶体管。以薄膜晶体管为顶栅型薄膜晶体管为例，该薄膜晶体管可以包括有源层、栅绝缘层、栅电极、层间绝缘层、源极以及漏极。该有源层可以设于衬底1上。该栅绝缘层可以设于衬底1上，并覆盖有源层。该栅电极可以设于栅绝缘层远离衬底1的一侧。该层间绝缘层可以设在栅绝缘层上，并覆盖栅电极。该源极和漏极可以设在层间绝缘层上，并经由穿过层间绝缘层和栅绝缘层的过孔连接至有源层。本公开的显示面板还可以包括平坦化层7和像素界定层8。该平坦化层7可以覆盖薄膜晶体管的源极、漏极以及层间绝缘层。该像素界定层8可以设于平坦化层7背向衬底1的一侧。如图6所示，该像素界定层8可以设有像素开口81。该像素开口81的数量可以为多个。
如图2所示，该发光单元9设于衬底1上，具体地，该发光单元9可以设于像素开口81。以像素开口81的数量为多个为例，该发光单元9的数量也可以为多个，且多个发光单元9一一对应地设于多个像素开口81。该多个 发光单元9可以包括红光发光单元、绿光发光单元以及蓝光发光单元。各发光单元9可以包括阳极层91、发光材料层92以及阴极层93。该阳极层91可以设于像素开口81所暴露的平坦化层7上，该阴极层93设于阳极层91背向衬底1的一侧，该发光材料层92可以设于阳极层91与阴极层93之间。该发光材料层92可以为有机电致发光材料层，但本公开实施方式不限于此。该阳极层91可以经由穿过平坦化层7的过孔与薄膜晶体管的源极或漏极电连接。该封装层10可以设于发光单元9以及像素界定层8的一侧。该封装层10可以为薄膜封装层(TFE)，但本公开实施方式对此不做特殊限定。其中，该发光单元9的出光侧可以为发光单元9面向衬底1的一侧，此时需设置衬底1为透明衬底或透光衬底，当然，该发光单元9的出光侧也可以为发光单元9背向衬底1的一侧。
如图2和图3所示，该反光结构4设于发光单元9的出光侧。以发光单元9的出光侧为发光单元9背向衬底1的一侧为例，该反光结构4可以设于像素界定层8背向衬底1的一侧。其中，该反光结构4可以设于封装层10背向衬底1的一侧，当然，该反光结构4也可以设于封装层10与像素界定层8之间。该反光结构4包括第一表面43、第二表面44以及反光侧面。该第一表面43和第二表面44相对设置，该反光侧面连接于第一表面43和第二表面44之间。该第一表面43面向发光单元9，该第二表面44设于第一表面43背向发光单元9的一侧。该第一表面43可以与衬底1平行或大致平行。该第二表面44可以与衬底1平行或大致平行。该反光侧面包括倾斜区域40。该倾斜区域40在垂直于衬底1的方向上倾斜，且倾斜区域40与衬底1的夹角为锐角，即倾斜区域40的坡度角为锐角。其中，该倾斜区域40与衬底1的夹角可以大于等于30°且小于90°。该反光结构4的折射率可以为1.4-1.55，例如1.4、1.45、1.5、1.55等。
如图2和图3所示，该倾斜区域40可以包括多个倾斜区，且多个倾斜区沿着衬底1的厚度方向分布。多个倾斜区与衬底1的夹角可以相等，当然， 也可以不相等。其中，该反光结构4在垂直于衬底1的方向上可以包括多个反光层，各反光层的侧面构成反光侧面的一部分。该反光层的厚度可以为1μm-3μm，例如1μm、2μm、3μm等。沿着靠近发光单元9的方向该反光层的截面面积逐渐增大，从而使该反光层的侧面可以构成上述的一个倾斜区。如图3所示，上述的多个倾斜区至少包括第一倾斜区401和第二倾斜区402，该第二倾斜区402可以位于第一倾斜区401远离发光单元9的一侧。具体地，上述的多个反光层至少包括第一反光层41和第二反光层42，第二反光层42位于第一反光层41远离发光单元9的一侧，第一反光层41的侧面构成所述第一倾斜区401，第二反光层42的侧面构成所述第二倾斜区402。此外，在与衬底1平行的方向上，该第二倾斜区402可以位于第一倾斜区401的内侧，即第二倾斜区402与反光结构4的距离小于第一倾斜区401与反光结构4的距离。在与衬底1平行的方向上，第二倾斜区402与第一倾斜区401的距离在平行于衬底1的方向上大于零，以使倾斜区域40形成上述的台阶结构。具体地，如图3所示，在平行于衬底1的方向上该第二倾斜区402与第一倾斜区401的距离d可以为0.5μm-6μm，例如0.5μm、1μm、1.5μm、2μm、3μm、4μm、5μm、6μm等。
如图2和图3所示，在本公开一实施方式中，该第二倾斜区402与衬底1的夹角β小于第一倾斜区401与衬底1的夹角α，其中，该第二倾斜区402与衬底1的夹角β大于等于30°且小于等于60°，例如30°、45°、50°、60°等；该第一倾斜区401与衬底1的夹角α大于45°等于且小于90°，例如45°、55°、72°、80°等。由于该第二倾斜区402与衬底1的夹角β小于第一倾斜区401与衬底1的夹角α，可以增大发射位置较远处的光线到达第二倾斜区402的入射角，增加了发生全反射的光线数量，进而提高了出光效率。在本公开其它实施方式中，该第二倾斜区402与衬底1的夹角β等于第一倾斜区401与衬底1的夹角α，该第二倾斜区402与衬底1的夹角β大于等于45°且小于90°，例如45°、55°、70°、80°等。
如图2和图3所示，以第一反光层41包括第一倾斜区401且第二反光层42包括第二倾斜区402为例，在第二倾斜区402与衬底1的夹角β小于第一倾斜区401与衬底1的夹角α时，该第二反光层42的折射率可以小于第一反光层41的折射率，当然，该第二反光层42的折射率也可以等于第一反光层41的折射率，例如第二反光层42的折射率以及第一反光层41的折射率均为1.4-1.55，但本公开不限于此，该第二反光层42的折射率也可以大于第一反光层41的折射率。在第二反光层42的折射率等于第一反光层41的折射率时，该第二反光层42的材料可以与第一反光层41的材料相同，当然，也可以不同。在第二倾斜区402与衬底1的夹角β等于第一倾斜区401与衬底1的夹角α时，该第二反光层42的折射率可以小于第一反光层41的折射率，例如第二反光层42的折射率为1.4-1.45且第一反光层41的折射率为1.5-1.55，如此设置，由于第二反光层42的折射率比第一反光层41更低，因此其全反射临界角也更小，增加了发生全反射光线的数量，提高了出光增益。
如图2所示，该反光结构4在衬底1上的正投影可以位于像素界定层8在衬底1上的正投影区域内。在本公开其它实施方式中，如图4和图5所示，该反光结构4在衬底1上的正投影的至少部分区域可以位于像素开口81在衬底1上的正投影区域内。举例而言，如图4所示，在平行于衬底1的方向上，该反光结构4可以包括第一部分100和第二部分200，该第一部分100在衬底1上的正投影围绕第二部分200在衬底1上的正投影，该第一部分100在衬底1上的正投影围绕像素开口81在衬底1上的正投影，且第一部分100在衬底1上的正投影可以位于像素界定层8在衬底1上的正投影区域内，该第二部分200在衬底1上的正投影的至少部分区域位于像素开口81在衬底1上的正投影区域内。当然，如图5所示，本公开的反光结构4也可以仅包括第二部分200，而不设置第一部分100，即反光结构4在衬底1上的正投影位于像素开口81在衬底1上的正投影区域内。该第二部分200的数量可以为一个、两个、三个、四个或更多个。如图7所示，该第二部分200可以呈条形结构，且沿 着与衬底1平行的方向延伸。其中，呈条形结构的第二部分200可以为直线形或折线形，当然，也可以呈曲线形，例如波浪线形等。如图7所示，以第二部分200的数量为一个为例，呈条形结构的第二部分200的两端均连接于第一部分100的内侧，且第二部分200可以将像素开口81等分为两块区域。如图8所示，以第二部分200的数量为两个为例，两个第二部分200交叉设置，各第二部分200的两端均连接于第一部分100的内侧，且第二部分200可以将像素开口81分为四块区域，其中，两个第二部分200可以将像素开口81等分为四块区域。如图9所示，以第二部分200的数量为三个为例，三个第二部分200的一端连接在一起，三个第二部分200的另一端均连接于第一部分100的内侧，且三个第二部分200可以将像素开口81为三个区域，其中，三个第二部分200可以将像素开口81等分为三个区域。其中，如图3所示，对于反光结构4的第一部分100，在平行于衬底1的方向上，第一部分100的第二倾斜区402与第一倾斜区401的距离d可以为2μm-6μm；对于反光结构4的第二部分200，在平行于衬底1的方向上，第二部分200的第二倾斜区402与第一倾斜区401的距离d可以为0.5μm-1.5μm。此外，呈条形结构的第二部分200中第一反光层41的宽度可以为4μm-6μm，呈条形结构的第二部分200中第二反光层42的宽度可以为3μm-5μm。
如图2所示，该透光结构5设于发光单元9的出光侧。以发光单元9的出光侧为发光单元9背向衬底1的一侧为例，该透光结构5可以设于像素界定层8背向衬底1的一侧。其中，该透光结构5可以设于封装层10背向衬底1的一侧，当然，该透光结构5也可以设于封装层10与像素界定层8之间。该透光结构5的材料可以包括油墨、光刻胶等。
如图2所示，该透光结构5至少覆盖反光结构4的倾斜区域40。其中，该透光结构5的一侧可以设有凹陷部。该凹陷部可以设于透光结构5面向发光单元9的一侧，当然，该凹陷部可以设于透光结构5背向发光单元9的一侧。上述的反光结构4可以设于凹陷部。该反光结构4可以伸出或未伸出凹 陷部。此外，该凹陷部还可以在垂直于衬底1的方向上贯穿透光结构5。在本公开其它实施方式中，该透光结构5可以包裹反光结构4。
如图2所示，该透光结构5的折射率大于反光结构4的折射率。该透光结构5的折射率可以为1.6-1.75，例如1.6、1.65、1.7、1.75等。当光线从高折射率材料进入低折射率材料时，如果入射角大于全反射临界角，则能够发生全反射，本公开设置反光结构4的折射率小于透光结构5的折射率，进而使本公开可以通过调整光线的入射角以实现光线的全反射，以降低能量损失，提高出光效率。此外，在垂直于衬底1的方向上，该透光结构5可以包括相对设置的第一结构面和第二结构面，该第一结构面设于第二结构面与发光单元9之间。该第一结构面可以与反光结构4的第一表面43平齐，当然，第一结构面可以与第一表面43错开设置，例如第一结构面设于第一表面43远离或靠近发光单元9的一侧。该第二结构面可以与反光结构4的第二表面44平齐，当然，第二结构面可以与第二表面44错开设置，例如第二结构面设于第二表面44远离或靠近发光单元9的一侧。
性能测试
比较例一
取消图2所示结构中的反光结构4，剩余的结构作为比较例一的测试结构。
测试例一
针对图2所示结构，设置第一反光层41的折射率和第二反光层42的折射率相等，第一反光层41的第一倾斜区401与衬底1的夹角为55°，第二反光层42的第二倾斜区402与衬底1的夹角为45°。与比较例一相比，测试例一的出光增益可以增加17.1％。
测试例二
与测试例一相比，测试例二的区别在于：设置第一反光层41的折射率 和第二反光层42的折射率不等，第一反光层41的折射率为1.5，第二反光层42的折射率为1.4，第一倾斜区401与衬底1的夹角等于第二倾斜区402与衬底1的夹角。与比较例一相比，测试例二的出光增益可以增加17.3％。
测试例三
测试例三中，在反光结构4的倾斜区域40不设置台阶结构。与比较例一相比，测试例三的出光增益可以增加12.5％。
本公开实施方式还提供一种显示装置。该显示装置可以包括上述任一实施方式所述的显示面板。该显示装置可以为手机、平板电脑、电视等。由于本公开实施方式的显示装置所包含的显示面板与上述显示面板的实施方式中的显示面板相同，其具有相同的有益效果，本公开在此不再赘述。
以上所述仅是本公开的较佳实施方式而已，并非对本公开做任何形式上的限制，虽然本公开已以较佳实施方式揭露如上，然而并非用以限定本公开，任何熟悉本专业的技术人员，在不脱离本公开技术方案的范围内，当可利用上述揭示的技术内容做出些许更动或修饰为等同变化的等效实施方式，但凡是未脱离本公开技术方案的内容，依据本公开的技术实质对以上实施方式所作的任何简单修改、等同变化与修饰，均仍属于本公开技术方案的范围内。

Claims (16)

  1. 一种显示面板，其特征在于，包括：
    衬底；
    发光单元，设于所述衬底上；
    反光结构，设于所述发光单元的出光侧，所述反光结构包括相对设置的第一表面、第二表面以及连接于所述第一表面和所述第二表面之间的反光侧面；所述第一表面面向所述发光单元，所述第二表面设于所述第一表面背向所述发光单元的一侧；所述反光侧面包括倾斜区域，所述倾斜区域具有台阶结构；
    透光结构，设于所述发光单元的出光侧，且至少覆盖所述倾斜区域，所述反光结构的折射率小于所述透光结构的折射率。
  2. 根据权利要求1所述的显示面板，其特征在于，所述倾斜区域包括多个倾斜区，多个所述倾斜区沿着所述衬底的厚度方向分布；多个所述倾斜区至少包括第一倾斜区和第二倾斜区，所述第二倾斜区位于所述第一倾斜区远离所述发光单元的一侧，且所述第二倾斜区与所述衬底的夹角小于所述第一倾斜区与所述衬底的夹角；其中，在与所述衬底平行的方向上，所述第二倾斜区位于所述第一倾斜区的内侧，以使所述倾斜区域形成所述台阶结构。
  3. 根据权利要求2所述的显示面板，其特征在于，所述第二倾斜区与所述衬底的夹角大于等于30°且小于等于60°，所述第一倾斜区与所述衬底的夹角大于等于45°且小于90°。
  4. 根据权利要求2所述的显示面板，其特征在于，所述反光结构包括第一反光层和第二反光层，所述第一反光层包括所述第一倾斜区，所述第二反光层包括所述第二倾斜区，所述第一反光层的材料和所述第二反光层的材料相同。
  5. 根据权利要求1-4任一项所述的显示面板，其特征在于，所述反光结构的折射率为1.4-1.55；和/或
    所述透光结构的折射率为1.6-1.75。
  6. 根据权利要求1所述的显示面板，其特征在于，所述倾斜区域包括多个倾斜区，多个所述倾斜区沿着所述衬底的厚度方向分布；多个所述倾斜区至少包括第一倾斜区和第二倾斜区，所述第二倾斜区位于所述第一倾斜区远离所述发光单元的一侧，且所述第二倾斜区与所述衬底的夹角等于所述第一倾斜区与所述衬底的夹角；其中，在与所述衬底平行的方向上，所述第二倾斜区位于所述第一倾斜区的内侧，以使所述倾斜区域形成所述台阶结构；
    所述反光结构包括第一反光层和第二反光层，所述第一反光层包括所述第一倾斜区，所述第二反光层包括所述第二倾斜区，所述第一反光层的折射率大于所述第二反光层的折射率。
  7. 根据权利要求6所述的显示面板，其特征在于，所述第二倾斜区与所述衬底的夹角大于等于45°且小于90°。
  8. 根据权利要求6或7所述的显示面板，其特征在于，所述第一反光层的折射率为1.5-1.55，所述第二反光层的折射率为1.4-1.45；和/或
    所述透光结构的折射率为1.6-1.75。
  9. 根据权利要求2或6所述的显示面板，其特征在于，在与所述衬底平行的方向上，所述第二倾斜区与所述第一倾斜区的距离为0.5μm-6μm。
  10. 根据权利要求1所述的显示面板，其特征在于，所述显示面板还包括：
    像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
    其中，所述像素开口在所述衬底上的正投影位于所述透光结构在所述衬底上的正投影区域内，所述反光结构在所述衬底上的正投影位于所述像素界定层在所述衬底上的正投影区域内。
  11. 根据权利要求1所述的显示面板，其特征在于，所述显示面板还包括：
    像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
    其中，所述反光结构在所述衬底上的正投影的至少部分区域位于所述像 素开口在所述衬底上的正投影区域内。
  12. 根据权利要求11所述的显示面板，其特征在于，所述显示面板还包括：
    像素界定层，设于所述衬底上，且设有像素开口，所述发光单元设于所述像素开口；
    其中，在平行于所述衬底的方向上所述反光结构包括第一部分和第二部分，所述第一部分在所述衬底上的正投影围绕所述第二部分在所述衬底上的正投影，所述第一部分在所述衬底上的正投影围绕所述像素开口在所述衬底上的正投影，所述第二部分在所述衬底上的正投影的至少部分区域位于所述像素开口在所述衬底上的正投影区域内。
  13. 根据权利要求12所述的显示面板，其特征在于，所述第二部分呈条形结构，且沿着与所述衬底平行的方向延伸。
  14. 根据权利要求1所述的显示面板，其特征在于，所述透光结构的一侧设有凹陷部，且所述透光结构设有所述凹陷部的一侧面向所述发光单元或背向所述发光单元，所述反光结构设于所述凹陷部。
  15. 根据权利要求14所述的显示面板，其特征在于，所述显示面板还包括：
    封装层，设于所述发光单元的一侧，所述透光结构设于所述封装层背向所述发光单元的一侧或所述透光结构设于所述封装层与所述发光单元之间。
  16. 一种显示装置，其特征在于，包括权利要求1-15任一项所述的显示面板。
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