WO2020186968A1 - Panneau d'affichage électroluminescent et son procédé de fabrication, et appareil d'affichage - Google Patents

Panneau d'affichage électroluminescent et son procédé de fabrication, et appareil d'affichage Download PDF

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Publication number
WO2020186968A1
WO2020186968A1 PCT/CN2020/076378 CN2020076378W WO2020186968A1 WO 2020186968 A1 WO2020186968 A1 WO 2020186968A1 CN 2020076378 W CN2020076378 W CN 2020076378W WO 2020186968 A1 WO2020186968 A1 WO 2020186968A1
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WIPO (PCT)
Prior art keywords
layer
light
display panel
pixel defining
emitting
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PCT/CN2020/076378
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English (en)
Chinese (zh)
Inventor
谢江容
夏曾强
聂汉
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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
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Publication of WO2020186968A1 publication Critical patent/WO2020186968A1/fr

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    • 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
    • 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
    • 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
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—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

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a light-emitting display panel, a manufacturing method thereof, and a display device.
  • the display When the ambient light irradiated to the display is strong, the display will reflect the ambient light irradiated on the display, and the reflected light generated by the display of the ambient light will interfere with the display when it is displayed. Of light. When the intensity of the reflected light generated by the display screen reflecting the ambient light is greater than the intensity of the light emitted by the display screen during display, the contrast of the display screen will be low, and the display effect will decrease. Therefore, reducing the interference of ambient light on the display of the display will greatly improve the display effect of the display.
  • the display screens are equipped with polarizers and quarter-wave plates to reduce the interference caused by external ambient light. For example, it can reduce the reflection of the display screen to ambient light.
  • the polarizers will cause the transmittance of the display to be low, and then Affect the power consumption and life of the display.
  • the embodiment of the present disclosure provides a light-emitting display panel having a non-display area and a display area, including: a flat layer; a pixel defining layer arranged on the flat layer; a portion of the pixel defining layer located in the display area A first recess that is recessed in the direction of the flat layer; the first electrode layer and the light-emitting layer arranged in the first recess are sequentially stacked along the direction away from the pixel defining layer, and the first electrode layer and the light-emitting layer share the first recess A second electrode layer disposed above the pixel defining layer and the light-emitting layer, the portion of the second electrode layer in the display area is conformal to the light-emitting layer; an encapsulation layer disposed on the second electrode layer, the encapsulation layer is located The portion of the display area is conformal to the portion of the second electrode layer located in the display area, forming a second recess that is recessed in the direction toward the second electrode layer; a conve
  • the ambient light consuming layer is provided with a light-transmitting hole, which is arranged at the focal point of the convex lens, so that the light emitted by the light-emitting layer is condensed by the convex lens and then passes through the light-transmitting hole to the light-emitting display panel External launch.
  • the pixel defining layer includes a first pixel defining layer and a second pixel defining layer, the first pixel defining layer is disposed on the flat layer, and the display area of the first pixel defining layer is disposed There is the first recess, and the second pixel defining layer is disposed on the non-display area of the first pixel defining layer.
  • the second pixel defining layer is made of black light-absorbing material.
  • the convex lens is a hemispherical lens
  • the spherical part of the hemispherical lens is disposed toward the encapsulation layer and conforms to the second recess
  • the flat part of the hemispherical lens faces the encapsulation layer.
  • the ambient light consuming layer includes a honeycomb structure including stacked hexagonal prisms, and the side edges of the hexagonal prisms are parallel to the display surface of the light-emitting display panel.
  • the ambient light consuming layer is made of transparent materials and/or light-absorbing materials.
  • the ambient light consuming layer includes a black light absorbing layer.
  • the ambient light consuming layer includes a black light absorbing layer and a honeycomb structure
  • the honeycomb structure includes stacked hexagonal prisms, the side edges of the hexagonal prisms are parallel to the display surface of the light emitting display panel, the black light absorbing layer and The honeycomb structure is sequentially arranged on the encapsulation layer.
  • the first electrode layer is an anode layer
  • the second electrode layer is a cathode layer
  • the organic light emitting display panel further includes an anti-reflection film layer, the anti-reflection film layer is disposed on the ambient light consuming layer, and the anti-reflection film layer includes a multilayer anti-reflection film.
  • Embodiments of the present disclosure also provide a method for manufacturing a light-emitting display panel, including: forming a pixel defining layer with a first recess on a flat layer, the first recess being located in a display area; forming a first electrode layer in the first recess, The first electrode layer is conformal to the first recess; a light-emitting layer is formed on the first electrode layer, and the light-emitting layer is conformal to the first electrode layer; a second electrode layer is formed above the pixel defining layer and the light-emitting layer, and the second electrode layer The portion of the encapsulation layer located in the display area is conformal to the light emitting layer; an encapsulation layer is formed above the second electrode layer, and the portion of the encapsulation layer located in the display area conforms to the portion of the second electrode layer located in the display area to form a second recess; A convex lens is formed in the second recess; an ambient light consuming layer is formed above the en
  • forming the pixel defining layer includes forming a first pixel defining layer having the first recess by an isotropic etching method, and forming a second pixel defining layer on the first pixel defining layer by patterning.
  • the pixel defining layer, the second pixel defining layer is located in the non-display area, and the second pixel defining layer is made of black light-absorbing material.
  • forming the ambient light consuming layer includes forming a honeycomb structure including stacked hexagonal prisms, the side edges of the hexagonal prisms being parallel to the display surface of the light-emitting display panel.
  • forming the ambient light consuming layer includes forming a black light absorbing layer and a honeycomb structure.
  • the honeycomb structure includes stacked hexagonal prisms, the side edges of the hexagonal prisms being parallel to the display surface of the light emitting display panel, the black light absorbing layer and The honeycomb structure is sequentially formed above the encapsulation layer and the convex lens.
  • the method for manufacturing the light-emitting display panel further includes: forming an anti-reflection film layer on the ambient light consuming layer, the anti-reflection film layer including a multilayer anti-reflection film.
  • the embodiment of the present disclosure also provides a display device including the light-emitting display panel of the embodiment of the present disclosure.
  • FIG. 1 shows an exemplary schematic diagram of a cross-section of a light-emitting display panel according to an embodiment of the present disclosure
  • Fig. 2 shows an exemplary perspective view of a honeycomb structure according to an embodiment of the present disclosure
  • Fig. 3 shows an exemplary cross-sectional view of a honeycomb structure according to an embodiment of the present disclosure
  • Fig. 4 shows an exemplary side view of a honeycomb structure according to an embodiment of the present disclosure
  • Fig. 5 shows an exemplary light path schematic diagram of ambient light in a honeycomb structure according to an embodiment of the present disclosure
  • FIG. 6 shows an exemplary flowchart of a method of manufacturing a light emitting display panel according to an embodiment of the present disclosure.
  • FIG. 1 shows an exemplary schematic diagram of a cross-section of a light emitting display panel according to an embodiment of the present disclosure.
  • the light-emitting display panel has a non-display area D1 and a display area D2, including: a flat layer 11; a pixel defining layer disposed on the flat layer 11, and a portion of the pixel defining layer located in the display area D2
  • a first recess recessed in the direction of the flat layer 11; the first electrode layer 21 and the light-emitting layer 22 arranged in the first recess of the pixel-defining layer are sequentially stacked along the direction away from the pixel-defining layer, the first electrode layer 21 and the light-emitting
  • the layer 22 is conformal to the first recess; the second electrode layer 23 disposed above the pixel defining layer and the light-emitting layer 22, the portion of the second electrode layer 23 located in the display area D2 is conformal to the light-emitting layer 22; disposed on the second electrode
  • the convex lens 31 may include a micro lens.
  • each sub-pixel may have a micro-lens, so that the entire light-emitting display panel includes a micro-lens array, which has the focusing function of a traditional lens, and has the characteristics of small size and high integration.
  • the microlens can focus the light emitted by the light-emitting layer 22, and the focused light can exit through the light-transmitting hole 19, as shown in FIG. 1.
  • the focal points of the microlenses of the microlens array are in the same plane.
  • the light-emitting layer 22 is conformal to the first recess of the pixel defining layer, that is, the light-emitting layer 22 is a curved light-emitting layer, and the curved light-emitting layer and the convex lens are combined to prevent the light emitted by the display panel during display.
  • the light emitted by the light-emitting layer is focused by the convex lens, and the focused light is emitted through the light transmission hole of the ambient light consuming layer, and most of the external ambient light is consumed by the ambient light consuming layer, thereby reducing
  • the external ambient light interferes with the display of the display panel, while also ensuring the transmittance of the display panel.
  • the first electrode layer 21 and the second electrode layer 23 are located in the display area D2
  • the part is conformal to the light-emitting layer 22, and both adopt a curved structure.
  • FIG. 1 shows an exemplary schematic diagram of a cross-section of a light-emitting display panel.
  • the light-emitting layer 22 is shown as an arc.
  • the light-emitting layer 22 is a curved surface in terms of three-dimensional effect, and the curvature of the curved surface can be determined according to
  • the structure of the convex lens 31 is set so that the light emitted by the light-emitting layer 22 can be focused by the convex lens 31 and emitted through the light transmission hole 19.
  • the pixel defining layer includes a first pixel defining layer 13 and a second pixel defining layer 14.
  • the first pixel defining layer 13 is disposed on the flat layer 11, and a portion of the first pixel defining layer 13 located in the display area D2 A first recess is provided, and the second pixel defining layer 14 is located on the first pixel defining layer 13 and located in the non-display area D1.
  • the dotted lines are used for division in FIG. 1.
  • the pixel defining layer includes the first pixel defining layer 13 and the second pixel defining layer 14, the second pixel defining layer 14 can be made of black light-absorbing material, which is beneficial to absorbing external ambient light.
  • the second recess of the encapsulation layer 15 is used to accommodate the convex lens 31.
  • the convex lens 31 may be a biconvex lens or a plano-convex lens, and the plano-convex lens may be a hemispherical lens, for example.
  • the convex lens 31 is a hemispherical lens
  • the spherical part of the hemispherical lens can be set toward the encapsulation layer 15 and can be conformal to the second recess of the encapsulation layer 15, and the flat part of the hemispherical lens can be set toward the ambient light consuming layer. Set the ambient light consumption layer.
  • the convex lens 31 can be made of BK7 glass or resin material.
  • the refractive index of the convex lens 31 can be about 1.517.
  • the ambient light consuming layer may be formed of transparent materials and/or light-absorbing materials.
  • the ambient light consuming layer may include a perforated microlens array, and the perforated microlens array may be formed by a light-transmitting hole and a lens with a micron-level relief depth. After the ambient light enters the ambient light consuming layer, multiple reflections, refractions and transmissions can occur inside the ambient light consuming layer, and most of it is eventually consumed.
  • the ambient light consuming layer may include a honeycomb structure 17 as shown in FIG. 2.
  • FIG. 3 shows an exemplary cross-sectional view of a honeycomb structure according to an embodiment of the present disclosure
  • FIG. 4 shows an exemplary side view of a honeycomb structure according to an embodiment of the present disclosure.
  • the honeycomb structure 17 may include stacked hexagonal prisms, and the side edges 171 of the hexagonal prisms are parallel to the display surface of the light-emitting display panel.
  • the honeycomb structure 17 can adopt nanotechnology, which has good adhesion.
  • the thickness of the honeycomb structure 17 (that is, the number of layers of hexagonal prisms in a direction perpendicular to the display surface of the light-emitting display panel) can be adjusted according to requirements to effectively consume ambient light, thereby avoiding the interference of ambient light on the display of the light-emitting display panel.
  • the side edges 171 of the hexagonal prism may extend in the horizontal or vertical direction parallel to the display surface of the light-emitting display panel.
  • Fig. 5 shows an exemplary optical path diagram of ambient light in a honeycomb structure according to an embodiment of the present disclosure.
  • the ambient light enters the interior of the honeycomb structure 17 after being refracted by the surface of the honeycomb structure 17, where reflection, refraction and transmission occur repeatedly in the interior of the honeycomb structure 17, and most of it is finally consumed.
  • some ambient light may propagate in a direction parallel to the side edges 171 of the hexagonal prism of the honeycomb structure 17.
  • the honeycomb structure 17 may be formed with a light-transmitting hole 19 for the light emitted by the light-emitting layer 22 to be focused by the convex lens 31 and then emitted.
  • the ambient light consuming layer includes a black light-absorbing layer 16, and a light-transmitting hole 19 is formed on the black light-absorbing layer 16 for the light emitted by the light-emitting layer 22 to be focused by the convex lens 31 and then emitted.
  • the ambient light consuming layer includes a black light absorbing layer 16 and a honeycomb structure 17, and the black light absorbing layer 16 and the honeycomb structure 17 are sequentially stacked on the encapsulation layer 15 and the convex lens 31. At this time, a small part of the ambient light passing through the honeycomb structure 17 is absorbed by the black light-absorbing layer 16, which is beneficial to further reducing the interference of ambient light on the display of the light-emitting display panel.
  • the stacking sequence of the black light absorption layer 16 and the honeycomb structure 17 above the encapsulation layer 15 and the convex lens 31 can be interchanged, that is, the honeycomb structure and the black light absorption layer can be sequentially arranged on the encapsulation layer 15 and the convex lens 31. At this time, part of the ambient light passing through the black light-absorbing layer is consumed by the honeycomb structure, which further reduces the interference of ambient light on the display of the light-emitting display panel.
  • an anti-reflection film layer 18 may also be provided above the ambient light consumption layer, and the anti-reflection film layer 18 may include multiple anti-reflection films.
  • the anti-reflection film layer 18 facilitates the ambient light to enter the ambient light consumption layer, and reduces the reflection of the ambient light by the light-emitting display panel. Since natural light has seven colors and a certain bandwidth, a single-layer antireflection coating only has antireflection effect on a certain wavelength of monochromatic light. Therefore, setting up multi-layer antireflection coatings for multiple colors in natural light can improve the performance of natural light.
  • the transmittance is more conducive to the ambient light entering the ambient light consuming layer, and further reduces the reflection of the ambient light by the light-emitting display panel.
  • An embodiment of the present disclosure also provides a method for manufacturing a light emitting display panel, including the following steps S10 to S80.
  • Step S10 forming a pixel defining layer with a first recess on the flat layer, the first recess being formed in the display area.
  • Step S20 forming a first electrode layer in the first recess, for example, through exposure and development, and the first electrode layer is conformal to the first recess.
  • Step S30 forming a light-emitting layer on the first electrode layer, for example, by evaporation, and the light-emitting layer is conformal to the first electrode layer.
  • Step S40 A second electrode layer is formed above the pixel defining layer and the light-emitting layer, for example, by evaporation, and a portion of the second electrode layer located in the display area is conformal to the light-emitting layer.
  • Step S50 forming an encapsulation layer above the second electrode layer, and a portion of the encapsulation layer located in the display area is conformal to a portion of the second electrode layer located in the display area to form a second recess.
  • Step S60 forming a convex lens in the second recess.
  • Step S70 An ambient light consuming layer is formed above the encapsulation layer and the convex lens.
  • the ambient light consuming layer is provided with a light-transmitting hole, and the light-transmitting hole is arranged at the focal point of the convex lens.
  • Step S80 forming an anti-reflection film layer on the ambient light consumption layer.
  • forming the pixel defining layer includes forming a first pixel defining layer and a second pixel defining layer.
  • the first pixel defining layer with the first recess can be formed by an isotropic etching method, and the second pixel defining layer can be formed on the first pixel defining layer by patterning, and the second pixel defining layer is located in the non-display area.
  • the second pixel defining layer can be made of black light-absorbing material
  • a flat layer can be fabricated, and the first pixel defining layer (PDL) with the first recess can be obtained by isotropic etching (the same etching in all directions) on the flat layer.
  • a chemical vapor deposition (CVD) method can be used to form a thin film on the first pixel defining layer, and a positive photoresist can be applied to areas of the thin film that do not need to be etched, or the thin film needs to be etched
  • the removed area is coated with negative photoresist, and the first electrode layer formed in the first recess is obtained through exposure and development.
  • the first electrode layer is conformal to the first recess.
  • the second pixel defining layer having a light-absorbing effect can be formed on the non-display area of the first pixel defining layer by patterning.
  • the light-emitting layer can be formed on the first electrode layer by evaporation, and conformal to the first electrode layer.
  • the order of forming the first electrode layer and the second pixel defining layer may not be limited, and the order of forming the second pixel defining layer and the light emitting layer may also not be limited.
  • the first pixel defining layer can be formed before or after forming the first electrode layer, or the first pixel defining layer can be formed before or after forming the light-emitting layer, which can be selected according to process requirements.
  • the second electrode layer can be formed on the second pixel defining layer and the light-emitting layer by evaporation.
  • the second electrode layer, the pixel defining layer and the flat layer are projected in a direction perpendicular to the display surface of the light-emitting display panel (ie , Orthographic projection) can overlap.
  • a portion of the second electrode layer located above the light-emitting layer is conformal to the light-emitting layer.
  • An encapsulation layer is formed on the second electrode to isolate water vapor and oxygen and play a protective role.
  • the portion of the encapsulation layer located above the light-emitting layer conforms to the portion of the second electrode layer located above the light-emitting layer (ie, located in the display area) to form a second recess in the second recess
  • a convex lens with converging effect is formed. It should be noted that since the encapsulation layer can prevent water and oxygen from being corroded, the light-transmitting holes on the ambient light consuming layer can be filled with or not filled with materials as needed.
  • the ambient light consuming layer may include a honeycomb structure, and a plurality of hexagonal prisms may be bonded together by an adhesive method to form the honeycomb structure.
  • the ambient light consumption layer may also include a black light absorption layer, and the black light absorption layer may be formed by a deposition method, or formed by pasting a black light absorption film.
  • the ambient light consuming layer may include a black light absorbing layer and a honeycomb structure at the same time, and the black light absorbing layer may be formed on or under the honeycomb structure.
  • the embodiment of the present disclosure also provides a display device, which includes the light-emitting display panel provided by the embodiment of the present disclosure.
  • the light emitting display panel of the embodiment of the present disclosure may be an organic light emitting display panel.

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  • Electroluminescent Light Sources (AREA)

Abstract

La présente invention concerne un panneau d'affichage électroluminescent et son procédé de fabrication, ainsi qu'un appareil d'affichage. Le panneau d'affichage électroluminescent a une zone de non-affichage et une zone d'affichage, et comprend : une couche de planarisation ; une couche de définition de pixel disposée sur la couche de planarisation, une partie, située dans la zone d'affichage, de la couche de définition de pixel comportant un premier évidement évidé dans une direction vers la couche de planarisation ; une première couche d'électrode et une couche électroluminescente qui sont agencées de manière séquentielle dans le premier évidement d'une manière stratifiée dans une direction opposée à la couche de définition de pixel, la première couche d'électrode et la couche électroluminescente étant conformes au premier évidement ; une seconde couche d'électrode disposée au-dessus de la couche de définition de pixel et de la couche électroluminescente, une partie, située dans la zone d'affichage, de la seconde couche d'électrode étant conforme à la couche électroluminescente ; une couche d'encapsulation disposée sur la seconde couche d'électrode, une partie, située dans la zone d'affichage, de la couche d'encapsulation étant conforme à la partie, située dans la zone d'affichage, de la seconde couche d'électrode pour former un second évidement évidée dans une direction vers la seconde couche d'électrode ; une lentille convexe disposée dans le second évidement ; et une couche de consommation de lumière ambiante disposée au-dessus de la couche d'encapsulation et de la lentille convexe, la couche de consommation de lumière ambiante comportant un trou de transmission de lumière, et le trou de transmission de lumière étant agencé au niveau d'un point focal de la lentille convexe, de telle sorte que la lumière émise par la couche électroluminescente est condensée par la lentille convexe et est ensuite émise vers l'extérieur du panneau d'affichage électroluminescent à travers le trou de transmission de lumière.
PCT/CN2020/076378 2019-03-19 2020-02-24 Panneau d'affichage électroluminescent et son procédé de fabrication, et appareil d'affichage WO2020186968A1 (fr)

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CN201910211743.6A CN109935726B (zh) 2019-03-19 2019-03-19 有机发光显示面板、其制造方法及显示装置

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