Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel comprises a substrate; the pixel limiting layer is located on one side of the substrate, and a plurality of pixel openings are defined by the pixel limiting layer; the light-emitting device layer comprises a plurality of light-emitting units, and at least parts of the light-emitting units are arranged in the pixel openings; the first structure is located on the side, away from the substrate, of the pixel limiting layer, the side face, close to the pixel opening, of the first structure is used for reflecting light of the first structure of the light-emitting unit reflecting paper, and the orthographic projection of the first structure on the substrate surrounds the orthographic projection of the pixel opening on the substrate. According to the technical scheme, optical crosstalk can be reduced or avoided.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] Compared with the organic light emitting diode (OLED) display technology, quantum dots (QD) have become a new display technology for large-size display due to their unique small size and adjustable narrow emission spectrum, which can effectively convert blue light into red and green light. However, there are some problems in QD-OLED display panels. Summary of the invention

[0003] In view of this, embodiments of the present application provide a display panel and a display device to solve the problems in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a display panel, comprising: a substrate; a pixel defining layer located on one side of the substrate, the pixel defining layer being arranged to form a plurality of pixel openings; a light-emitting device layer, the light-emitting device layer comprising a plurality of light-emitting units, at least part of the light-emitting units being arranged in the pixel openings; a first structure located on a side of the pixel defining layer facing away from the substrate, the side of the first structure close to the pixel opening being used to reflect light emitted from the light-emitting unit to the first structure, the orthographic projection of the first structure on the substrate surrounding the orthographic projection of the pixel opening on the substrate.

[0005] In combination with the first aspect, along the direction away from the substrate, the first structure includes a first part and a second part which are stacked in sequence, and at least the side of the second part close to the pixel opening is used to reflect the light emitted from the light-emitting unit to the second part; preferably, the cross-sectional shape of the second part in the direction perpendicular to the substrate includes at least one of a rectangle, a trapezoid, a semicircle, or a semi-ellipse; preferably, the orthographic projection of the second part on the substrate is located within the orthographic projection of the first part on the substrate, or the orthographic projection of the second part on the substrate overlaps with the orthographic projection of the first part on the substrate; preferably, the display panel also includes a light conversion layer, which is located on the side of the light-emitting device layer away from the substrate, the distance from the surface of the first part away from the substrate to the light conversion layer is the first distance, and the height of the second part in the direction perpendicular to the substrate is greater than or equal to 0.7×the first distance and less than the first distance; preferably, the second part The material includes a metal material or a material with a reflectivity greater than or equal to 90% and less than or equal to 98%; preferably, the cross-sectional shape of the first portion in a direction perpendicular to the substrate includes at least one of an I-shape and an inverted trapezoid; preferably, the height of the first portion in a direction perpendicular to the substrate is greater than or equal to 0.7um, and the projection width of the first portion on the substrate is greater than or equal to 5um; preferably, the first portion includes a first sub-portion and a second sub-portion stacked in sequence in a direction away from the substrate, and the orthographic projection of the first sub-portion on the substrate is located within the orthographic projection of the second sub-portion on the substrate; preferably, the first portion also includes a third sub-portion, the third sub-portion is located on the side of the first sub-portion close to the substrate, and the orthographic projection of the first sub-portion on the substrate is located within the orthographic projection of the third sub-portion on the substrate; preferably, the material of the first sub-portion includes aluminum, and the materials of the second sub-portion and the third sub-portion include titanium.

[0006] In combination with the first aspect, the cross-sectional shape of the first structure in the direction perpendicular to the substrate includes at least one of a rectangle or a trapezoid; preferably, the cross-sectional shape of the first structure in the direction perpendicular to the substrate includes a regular trapezoid; preferably, the material of the first structure includes a material with a reflectivity greater than or equal to 90% and less than or equal to 98%; preferably, the material of the first structure is the same as the material of the pixel defining layer and is prepared in the same layer; preferably, the height of the first structure in the direction perpendicular to the substrate is greater than 1.6um, and the projection width of the first structure on the substrate is greater than or equal to 5um and less than or equal to 10um; preferably, the distance between the orthographic projection of the first structure on the substrate and the orthographic projection of the pixel opening on the substrate is greater than or equal to 3um and less than or equal to 5um.

[0007] In combination with the first aspect, it also includes a first conductive layer and a second conductive layer stacked in sequence on the side of the first structure away from the substrate, the orthographic projections of the first conductive layer and the second conductive layer on the substrate overlap, and the first conductive layer covers the surface of the first structure and at least a portion of the surface of the pixel defining layer; preferably, in a direction away from the substrate, the light-emitting unit includes a first electrode, a light-emitting functional layer, and a second electrode stacked in sequence, the first electrode includes a first sub-electrode, a second sub-electrode, and a third sub-electrode stacked in sequence in a direction away from the substrate, the material of the first conductive layer is the same as the material of the second sub-electrode, and the material of the second conductive layer is the same as the material of the third sub-electrode; preferably, the first sub-electrode is located on the side of the pixel defining layer close to the substrate, and At least partially exposed in the pixel opening; at least part of the second sub-electrode and at least part of the third sub-electrode are located on the side of the bottom wall of the pixel opening away from the substrate, and are electrically connected to the first sub-electrode; preferably, the first conductive layer and the second sub-electrode are prepared in the same layer, and the first conductive layer and the second sub-electrode are disconnected; the second conductive layer and the third sub-electrode are prepared in the same layer, and the second conductive layer and the third sub-electrode are disconnected; preferably, the disconnection position between the first conductive layer and the second sub-electrode is located at the pixel defining layer between the first structure and the pixel opening; the disconnection position between the second conductive layer and the third sub-electrode is located at the pixel defining layer between the first structure and the pixel opening; preferably, the material of the first conductive layer includes silver, and the material of the second conductive layer includes indium tin oxide.

[0008] In combination with the first aspect, the side of the pixel defining layer away from the substrate includes a second structure, the second structure is a groove structure, and the orthographic projection of the second structure on the substrate surrounds the orthographic projection of the pixel opening on the substrate; preferably, the cross-sectional shape of the second structure in the direction perpendicular to the substrate includes a regular trapezoid; preferably, the width of the second structure away from the substrate is greater than or equal to 4um, and the ratio of the height of the second structure in the direction perpendicular to the substrate to the height of the pixel defining layer in the direction perpendicular to the substrate is greater than or equal to 0.5 and less than or equal to 0.8; preferably, along the direction away from the substrate, the light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode stacked in sequence on the substrate, the light-emitting functional layer includes a common layer and a light-emitting layer stacked, the common layer covers the bottom wall and side walls of the pixel opening, and extends to at least a portion of the surface of the pixel defining layer between two adjacent pixel openings; the second structure at least isolates the common layer; preferably, the light-emitting layer The orthographic projection on the substrate overlaps with the orthographic projection of the common layer on the substrate, and the second structure separates the light-emitting layer and the common layer; preferably, the second electrodes of two adjacent light-emitting units are electrically connected to form a second electrode layer, and the second structure partially separates the second electrode layer; preferably, the orthographic projection of the second structure on the substrate discontinuously surrounds the orthographic projection of the pixel opening on the substrate; preferably, for any pixel opening, the pixel defining layer includes at least two groups of second structures discontinuously surrounding the pixel opening, the at least two groups of second structures include a first group of second structures and a second group of second structures, and the orthographic projection of the second group of second structures on the substrate discontinuously surrounds the orthographic projection of the first group of second structures on the substrate; preferably, the first group of second structures includes a plurality of first substructures arranged at intervals, and / or the second group of second structures includes a plurality of second substructures arranged at intervals, and the orthographic projection of the first substructure on the substrate is staggered with the orthographic projection of the second substructure on the substrate.

[0009] In combination with the first aspect, along the direction away from the substrate, the light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode stacked in sequence on the substrate, the light-emitting functional layer includes a common layer and a light-emitting layer stacked, the common layer covers the bottom wall and side walls of the pixel opening and extends to at least part of the surface of the pixel defining layer between two adjacent pixel openings; the first part at least separates the common layer; preferably, the light-emitting layer is at least located on the bottom wall of the pixel opening; preferably, the orthographic projection of the light-emitting layer on the substrate overlaps with the orthographic projection of the common layer on the substrate, and the first part separates the common layer and the light-emitting layer; preferably, the second electrodes of two adjacent light-emitting units are electrically connected to form a second electrode layer, the second electrode layer extends along the side wall of the first structure and covers the first structure; or, the first part separates the second electrode layer, the second electrode layer overlaps the first part, and the material of the first part includes a conductive material.

[0010] In combination with the first aspect, the orthographic projection of the first structure on the substrate continuously surrounds the orthographic projection of the pixel opening on the substrate; preferably, for any pixel opening, the display panel includes at least two groups of first structures continuously surrounding the pixel opening, the at least two groups of first structures include a first group of first structures and a second group of first structures, and the orthographic projection of the second group of first structures on the substrate continuously surrounds the orthographic projection of the first group of first structures on the substrate.

[0011] In combination with the first aspect, the orthographic projection of the first structure on the substrate discontinuously surrounds the orthographic projection of the pixel opening on the substrate; preferably, for any pixel opening, the display panel includes at least two groups of first structures discontinuously surrounding the pixel opening, the at least two groups of first structures include a first group of first structures and a second group of first structures, and the orthographic projection of the second group of first structures on the substrate discontinuously surrounds the orthographic projection of the first group of first structures on the substrate; preferably, the first group of first structures includes a plurality of third substructures arranged at intervals, the second group of first structures includes a plurality of fourth substructures arranged at intervals, and the orthographic projection of the third substructures on the substrate is alternately arranged with the orthographic projection of the fourth substructures on the substrate.

[0012] In combination with the first aspect, along the direction away from the substrate, the light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode stacked in sequence on the substrate, the light-emitting functional layer includes a common layer and a light-emitting layer stacked, the light-emitting functional layer covers the bottom wall and the side wall of the pixel opening, and extends to at least part of the surface of the pixel defining layer between two adjacent pixel openings; preferably, the common layer includes a first transport layer and a second transport layer, and the first transport layer and the second transport layer are respectively located on both sides of the light-emitting layer; preferably, the materials of the first transport layer and the second transport layer include organic materials; preferably, the common layer also includes a first injection layer and a second injection layer, the first injection layer is located between the first electrode and the first transport layer, and the second injection layer is located between the second electrode and the second transport layer; preferably, the light-emitting functional layer includes a plurality of stacked light-emitting functional sublayers and a charge generation layer arranged between adjacent light-emitting functional sublayers; preferably, the charge generation layer includes at least one of an anode charge generation layer and a cathode charge generation layer.

[0013] In combination with the first aspect, the display panel further comprises a color conversion layer, which is located on the side of the light-emitting device layer away from the substrate, the color conversion layer comprises a plurality of color conversion units, the orthographic projection of the color conversion unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, the color conversion unit corresponds to the light-emitting unit, and the light-emitting unit is used to excite the corresponding color conversion unit to emit light; preferably, the color conversion unit comprises a red color conversion unit and a green color conversion unit, the color conversion layer further comprises a light-transmitting unit, the orthographic projection of the light-transmitting unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, the light-transmitting unit corresponds to the light-emitting unit, and the light-transmitting unit is used to transmit light emitted by the corresponding light-emitting unit; preferably, the color conversion layer further comprises a first retaining wall structure, the first retaining wall structure is located between adjacent color conversion units, or between the color conversion unit and the light-transmitting unit; preferably, the display panel further comprises a filter layer, the filter layer is located on the side of the color conversion layer away from the substrate, the filter layer comprises a plurality of A filter unit, the orthographic projection of the filter unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, and the color of the filter unit corresponding to the same light-emitting unit is the same as the color of the light emitted by the color conversion unit or the same as the color of the light transmitted by the light-transmitting unit; preferably, the filter layer also includes a plurality of second retaining wall structures, and the second retaining wall structures are located between adjacent filter units; preferably, the display panel also includes a semi-transparent and semi-reflective film layer, and the semi-transparent and semi-reflective film layer is located on the side of the filter layer away from the substrate; preferably, the display panel also includes a first encapsulation layer, the first encapsulation layer is located between the color conversion layer and the light-emitting device layer, and the first encapsulation layer includes a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer which are sequentially stacked in a direction away from the substrate; preferably, the display panel also includes a second encapsulation layer, and the second encapsulation layer is located between the first encapsulation layer and the color conversion layer; preferably, the display panel also includes an adhesive layer, which is located between the first encapsulation layer and the second encapsulation layer.

[0014] In a second aspect, an embodiment of the present application provides a display device, and the display device includes: the above-mentioned display panel.

[0015] Through the above technical solution, a first structure is set on the side of the pixel defining layer facing away from the substrate. The first structure can reflect the light irradiated to its surface, thereby blocking the large-angle light emitted by the light-emitting unit from irradiating to the top of the adjacent light-emitting unit (for example, irradiating to the color conversion unit), reducing or avoiding optical crosstalk. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of a display panel provided in one embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0018] Figure 3a to Figure 3d They are schematic diagrams of the structure of the first structure respectively.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0021] Figure 6 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0022] Figure 7 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0023] Figure 8a and Figure 8b They are respectively schematic top view structural diagrams of the second structure provided in one embodiment of the present application.

[0024] Fig. 9 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0025] Fig.10 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application.

[0026] Figures 11a to 11d They are respectively schematic top view structural diagrams of the first structure provided in one embodiment of the present application.

[0027] Fig.12 It is a schematic diagram of the structure of a light-emitting functional layer provided in one embodiment of the present application.

[0028] Fig.13 It is a schematic diagram of the structure of a display device provided in one embodiment of the present application.

[0029] Figure numerals: 10 substrate; 20 pixel defining layer; 2011 bottom wall; 2012 side wall; 201 pixel opening; 210 second structure; first group second structure 211; first substructure 2111; second group second structure 212; second substructure 2121; 30 light-emitting device layer; 310 light-emitting unit; 311 first electrode; 3111 first sub-electrode; 3112 second sub-electrode; 3113 third sub-electrode; 312 light-emitting functional layer; 3120 light-emitting functional sub-layer; 3121 first transport layer; 3122 light-emitting layer; 3123 second transport layer; 3124 charge connection layer; 313 second electrode; 40 first structure; 4 1 first group first structure; 415 third substructure; 42 second group first structure; 421 fourth substructure; 410 first part; 411 first subpart; 412 second subpart; 413 third subpart; 420 second part; 50 first encapsulation layer; 510 first inorganic encapsulation layer; 520 organic encapsulation layer; 530 second inorganic encapsulation layer; 60 color conversion layer; 610 color conversion unit; 611 red color conversion unit; 612 green color conversion unit; 620 first retaining wall structure; 630 light transmission unit; 70 filter layer; 710 filter unit; 720 second retaining wall structure; 80 semi-transparent and semi-reflective film layer; 90 second encapsulation layer; 100 adhesive layer. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] The display principle of the QD-OLED display panel is to drive the blue organic light emitting diode (Blue-Organic Light Emitting Diode, B-OLED) to emit light through the array substrate. When the emitted light irradiates the red quantum dot unit, it excites the quantum dot to emit red light. When the emitted light irradiates the green quantum dot unit, it excites the quantum dot to emit green light, thereby achieving red, green and blue light. However, due to the presence of other film layers between the OLED and QD devices, that is, there is a certain distance between the two, when the OLED emits light, the large-angle light will irradiate the QD of the adjacent pixel, causing the QD of the adjacent pixel to emit light or emit more light, causing optical crosstalk, and then causing uneven color of the screen. In addition, the common layer of OLED is prepared by a whole-surface evaporation process, and there is lateral charge transfer, which drives the OLED of the adjacent pixel to emit light, causing electrical crosstalk, which will also cause the problem of uneven color of the screen.

[0032] In view of the above technical problems, an embodiment of the present application provides a display panel, which includes a substrate; a pixel defining layer, which is located on one side of the substrate, and the pixel defining layer is surrounded to form a plurality of pixel openings; a light-emitting device layer, which includes a plurality of light-emitting units, and at least part of the light-emitting units is arranged in the pixel openings; a first structure, which is located on the side of the pixel defining layer away from the substrate, and the side of the first structure close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the first structure, and the orthographic projection of the first structure on the substrate surrounds the orthographic projection of the pixel opening on the substrate. In the embodiment of the present application, the first structure can reflect the light irradiated to its surface, thereby blocking the large-angle light emitted by the light-emitting unit from irradiating to the top of the adjacent light-emitting unit (for example, irradiating to the color conversion unit), reducing or avoiding optical crosstalk.

[0033] Figure 1 is a schematic diagram of a cross-sectional structure of a display panel provided by an embodiment of the present application. Figure 1 As shown, the display panel includes a substrate 10 , a pixel definition 20 , a light emitting device layer 30 and a first structure 40 .

[0034] In an embodiment of the present application, the substrate 10 includes a rigid substrate, such as a glass substrate; or, the substrate 10 includes a flexible substrate, such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.

[0035] The pixel defining layer 20 is located on one side of the substrate 10, and the pixel defining layer 20 is surrounded by a plurality of pixel openings 201. In the embodiment of the present application, the pixel defining layer 20 includes an organic material or an inorganic material, which is not limited in the present application. For the convenience of explaining the present application, Figure 1 Only three pixel openings are shown in the figure. It can be understood that the display panel of the present application includes multiple pixel openings 201.

[0036] The light-emitting device layer 30 includes a plurality of light-emitting units 310, at least part of which is disposed in the pixel opening 201. In the embodiment of the present application, the plurality of light-emitting units 310 emit a single color of light, for example, blue light. In the embodiment of the present application, in a direction away from the substrate 10, the light-emitting unit 310 includes a first electrode 311, a light-emitting functional layer 312, and a second electrode 313 which are sequentially stacked, the first electrode 311 being located between the substrate 10 and the pixel defining layer 20, the pixel opening 201 exposing a portion of the first electrode 311, at least part of the light-emitting functional layer 312 covering the exposed first electrode 311, and the second electrode 313 at least partly covering the light-emitting functional layer 312. In the embodiment of the present application, the first electrode 311 is an anode, and the second electrode 313 is a cathode; or, the first electrode 311 is a cathode, and the second electrode 313 is an anode.

[0037] The first structure 40 is located on the side of the pixel defining layer away from the substrate 10. The side of the first structure 40 close to the pixel opening 201 is used to reflect the light emitted from the light emitting unit 310 to the first structure 40. In the embodiment of the present application, the orthographic projection of the first structure 40 on the substrate 10 surrounds the orthographic projection of the pixel opening 201 on the substrate 10. In the embodiment of the present application, by setting the first structure, the large-angle light emitted by the light emitting unit 310 can be reflected back to prevent it from irradiating the upper part of the adjacent light emitting unit 310 and causing optical crosstalk; in addition, the reflected light is emitted from the upper part of the light emitting unit 310, which can converge the light, thereby improving the light extraction efficiency.

[0038] Continue to refer Figure 1 The display panel also includes a first encapsulation layer 50, which is located on the side of the light-emitting device layer 30 away from the substrate 10. The first encapsulation layer 50 includes a first inorganic encapsulation layer 510, an organic encapsulation layer 520 and a second inorganic encapsulation layer 530 which are stacked in sequence in a direction away from the substrate 10.

[0039] In the embodiment of the present application, the shape and material of the first structure 40 are not limited, as long as the function of reflecting light can be realized. The first structure 40 is described below through a specific embodiment. It can be understood that the shape of the first structure 40 in the following embodiment is only an example and is not used to limit the protection scope of the present application. Those skilled in the art can adaptably change the shape of the first structure 40 based on the disclosure of the present application.

[0040] Figure 2 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 2 The display panel shown is Figure 1The difference between the display panels shown is the shape of the first structure 40. In the embodiment of the present application, along the direction away from the substrate 10, the first structure 40 includes a first portion 410 and a second portion 420 stacked in sequence, and at least the side of the second portion 420 close to the pixel opening 201 is used to reflect the light emitted from the light-emitting unit 310 to the second portion 420. Optionally, only the second portion 420 can reflect light; or, both the first portion 410 and the second portion 420 can reflect light.

[0041] In the embodiment of the present application, the cross-sectional shape of the second portion 420 in the direction perpendicular to the substrate 10 includes at least one of a rectangle (e.g., a rectangle or a square), a trapezoid (e.g., a regular trapezoid or an inverted trapezoid), a semicircle, or a semi-ellipse. The cross-sectional shape of the first portion 410 in the direction perpendicular to the substrate 10 includes at least one of an I-shaped shape and an inverted trapezoid. Figure 3a to Figure 3d They are schematic diagrams of the first structure. Figure 3a As shown, the shape of the first portion 410 includes an I-shape, and the shape of the second portion 420 includes a rectangle. Figure 3b As shown, the shape of the first portion 410 includes an I-shape, and the shape of the second portion 420 includes a semicircle. Figure 3c As shown, the shape of the first portion 410 includes an I-shape, and the shape of the second portion 430 includes a regular trapezoid. Figure 3d As shown, the shape of the first portion 410 includes an inverted trapezoid, and the shape of the second portion 420 includes a rectangle. It can be understood that Figure 3a-3d It is only for illustration, and those skilled in the art may reasonably design the shapes of the first part 410 and the second part 420 based on the disclosure of this application. Figure 3a-3d The sizes of the first portion 410 and the second portion 420 are only examples and are not drawn to scale.

[0042] Optionally, the orthographic projection of the second portion 420 on the substrate 10 overlaps with the orthographic projection of the first portion 410 on the substrate 10, or the orthographic projection of the second portion 420 on the substrate 10 is located within the orthographic projection of the first portion 410 on the substrate 10. When the orthographic projection of the second portion 420 on the substrate 10 is located within the orthographic projection of the first portion 410 on the substrate 10, the surface of the first portion 410 that is not covered by the second portion 420 on the side facing away from the substrate 10 may be covered with the material of the light-emitting functional layer 312 (not shown in the figure for ease of drawing). Optionally, the display panel further includes a light conversion layer ( Figure 2 Not shown, such as Figure 4 The light conversion layer 60 in the light emitting device layer 30 is located on the side away from the substrate 10, and the distance from the surface of the first portion 410 away from the substrate 10 to the light conversion layer is a first distance H1 (such as Figure 4As shown in FIG. 1 ), the height H2 of the second portion 420 in the direction perpendicular to the substrate 10 is greater than or equal to 0.7×the first distance and less than the first distance. In this way, the first structure 40 can reflect most of the large-angle light to avoid irradiating the upper part of the adjacent light-emitting unit, thereby avoiding or reducing optical crosstalk; in some embodiments, after the first structure 40 is provided, the conventionally provided filter layer can be omitted, so that there is no need to consider the alignment accuracy and fitting accuracy of the filter unit of the filter layer and the light-emitting unit, as well as the transmittance of the filter layer itself, thereby simplifying the process and design process and improving the light extraction efficiency.

[0043] In the embodiment of the present application, the material of the second part 420 includes a metal material or a low-refractive-high-reflective material. The metal material includes silver, aluminum, etc. The reflectivity of the low-refractive-high-reflective material is greater than or equal to 90% and less than or equal to 98%. Exemplarily, the reflectivity of the low-refractive-high-reflective material is 90%, 92%, 94%, 96%, 98%.

[0044] like Figure 2 and Figure 3a As shown, the height H3 of the first portion 410 in the direction perpendicular to the substrate 10 is greater than or equal to 0.7um. By way of example, the height H3 of the first portion 410 in the direction perpendicular to the substrate 10 is 0.7um, 0.9um, 1um, 1.5um, 2um, etc. The projection width H4 of the first portion 410 on the substrate 10 is greater than or equal to 5um, that is, the maximum width H4 of the first portion 410 in the direction parallel to the substrate 10 is greater than or equal to 5um. By way of example, the projection width H4 of the first portion 410 on the substrate 10 is 5um, 8um, 10um, 15um, etc.

[0045] When the first structure 40 is an inverted trapezoid, as Figure 3d As shown, the first portion 410 includes a first sub-portion 411 and a second sub-portion 412 which are sequentially stacked in a direction away from the substrate 10, and the orthographic projection of the first sub-portion 411 on the substrate 10 is located within the orthographic projection of the second sub-portion 412 on the substrate 10. When the first structure 40 is an I-shaped structure, such as Figure 3a As shown, the first portion 410 includes a third sub-portion 413, a first sub-portion 411, and a second sub-portion 412 which are sequentially stacked in a direction away from the substrate 10. The orthographic projection of the first sub-portion 411 on the substrate 10 is located within the orthographic projection of the second sub-portion 412 on the substrate 10, and the orthographic projection of the first sub-portion 411 on the substrate 10 is located within the orthographic projection of the third sub-portion 413 on the substrate 10. Optionally, the material of the first sub-portion 411 includes aluminum, and the materials of the second sub-portion 412 and the third sub-portion 413 include titanium.

[0046] In the embodiment of the present application, the light-emitting functional layer 312 includes a common layer and a light-emitting layer stacked together, the common layer covers the bottom wall 2011 and the side wall 2012 of the pixel opening 201, and extends to at least a portion of the surface of the pixel defining layer 20 between two adjacent pixel openings 201. Optionally, the common layer includes a first transmission layer and a second transmission layer, and the first transmission layer and the second transmission layer are respectively located on both sides of the light-emitting layer. Figure 2 As shown, the light-emitting functional layer 312 includes a first transmission layer 3121, a light-emitting layer 3122, and a second transmission layer 3123 which are sequentially stacked in a direction away from the substrate 10. The first transmission layer 3121 and the second transmission layer 3123 cover the bottom wall 2011 and the side wall 2012 of the pixel opening 201, and extend to at least part of the surface of the pixel defining layer 20 between two adjacent pixel openings 201. Figure 2 , the orthographic projection of the light-emitting layer 3122 on the substrate 10 overlaps with the orthographic projection of the common layer (for example, the first transmission layer 3121 or the second transmission layer 3123) on the substrate 10, that is, the light-emitting layer 3122 is formed by a whole-surface evaporation process. In an embodiment of the present application, the first electrode 311 is an anode, the second electrode 313 is a cathode, the first transmission layer 3121 includes a hole transmission layer, and the second transmission layer 3123 includes an electron transmission layer. It is understood that the common layer may also include other film layers, for example, an injection layer. Exemplarily, the common layer also includes a first injection layer and a second injection layer, the first injection layer is located between the first electrode 311 and the first transmission layer 3121, and the second injection layer is located between the second electrode 313 and the second transmission layer 3123. Optionally, the materials of the first transmission layer 3121 and the second transmission layer 3123 include organic materials. The materials of the first injection layer and the second injection layer include inorganic materials. Since the first transmission layer 3121 and the second transmission layer 3123 are formed by full-surface vapor deposition, lateral charge transmission is likely to occur, resulting in electrical crosstalk.

[0047] In the embodiment of the present application, since the cross-sectional shape of the first portion 410 is an I-shaped or inverted trapezoidal shape, when preparing the light-emitting functional layer 312, the light-emitting functional layer 312 is located in the region of the first portion 410 close to the substrate 10 ( Figure 2 The first part 410 is disconnected in area A in the first part 410, so that the common layer of the adjacent light-emitting units 310 is disconnected, which can avoid lateral charge transfer, thereby avoiding or reducing electrical crosstalk and improving luminous efficiency. In other words, the first part 410 can isolate the common layer (i.e., the first transmission layer 3121, the second transmission layer 3123) and the light-emitting layer 3122. The first transmission layer 3121, the light-emitting layer 3122 and the second transmission layer 3123 are disconnected at the side wall (area A) of the first part 410. That is, the first structure in the embodiment of the present application can reflect light, reduce or avoid optical crosstalk, and thus improve luminous efficiency; it can also isolate the common layer, avoid lateral charge transfer, reduce or avoid electrical crosstalk, and improve luminous efficiency.

[0048] In the embodiment of the present application, the second electrodes 313 of two adjacent light-emitting units 310 are electrically connected to form a second electrode layer. When the second electrode layer is evaporated, continuous evaporation of the second electrode layer can be achieved, that is, the first portion 410 does not block the second electrode layer, and the second electrode layer extends along the side wall of the first structure 40 and covers the first structure 40 (that is, the second electrode layer can cover the surface of the first portion 410 and the second portion 420). That is, the entire surface of the second electrode layer is conductive, which does not affect the voltage drop of the screen body, and ensures the uniformity of the brightness of the screen body.

[0049] Figure 4 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 4 The display panel shown is Figure 2 The difference between the display panel shown is that the display panel further includes a color conversion layer 60, which is located on the side of the first encapsulation layer 50 away from the substrate 10, and the color conversion layer 60 includes a plurality of color conversion units 610, the orthographic projection of the color conversion unit 610 on the substrate 10 overlaps at least partially with the orthographic projection of the light-emitting unit 310 on the substrate 10, and the color conversion unit 610 corresponds to the light-emitting unit 310, and the light-emitting unit 310 is used to excite the corresponding color conversion unit 610 to emit light. Optionally, the color conversion unit 610 includes a red color conversion unit 611 and a green color conversion unit 612, and when the light emitted by the light-emitting unit 310 irradiates the red color conversion unit 611, the red color conversion unit 611 is excited to emit red light, and when the light emitted by the light-emitting unit 310 irradiates the green color conversion unit 612, the green color conversion unit 612 is excited to emit green light. In the embodiment of the present application, the red color conversion unit 611 is formed of a red quantum dot material, and the green color conversion unit 612 is formed of a green quantum dot material. The red quantum dot material and / or the green quantum dot material are conventional materials in the art and are not limited here.

[0050] Optionally, the color conversion layer 60 further includes a light-transmitting unit 630, the orthographic projection of the light-transmitting unit 630 on the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 310 on the substrate 10, the light-transmitting unit 630 corresponds to the light-emitting unit 310, and the light-transmitting unit 630 is used to transmit the light emitted by the corresponding light-emitting unit 310. In the embodiment of the present application, the light-transmitting unit 630 includes a transparent material, such as organic glue, etc.

[0051] Optionally, the color conversion layer 60 further includes a first retaining wall structure 620, and the first retaining wall structure 620 is located between adjacent color conversion units 610, or between the color conversion unit 610 and the light-transmitting unit 630. In the embodiment of the present application, the material of the color conversion layer 60 includes organic glue.

[0052] Continue to refer Figure 4The display panel further includes a filter layer 70, which is located on the side of the color conversion layer 60 away from the substrate 10. The filter layer 70 includes a plurality of filter units 710, and the orthographic projection of the filter unit 710 on the substrate 10 at least partially overlaps with the orthographic projection of the light-emitting unit 310 on the substrate 10, and the color of the filter unit 710 corresponding to the same light-emitting unit 310 is the same as the color of the light emitted by the color conversion unit 610 or the same as the color of the light transmitted by the light-transmitting unit 630. The filter unit 710 is used to filter stray light and improve the color purity of the light. Optionally, the filter layer 70 further includes a plurality of second retaining wall structures 720, and the second retaining wall structures 720 are located between adjacent filter units 710. In the embodiment of the present application, the material of the second retaining wall structure 720 includes a black material, for example, a black organic material or a black metal material.

[0053] In the embodiment of the present application, the display panel further includes a semi-transmissive and semi-reflective film layer 80, which is located on the side of the filter layer 70 away from the substrate 10. The semi-transmissive and semi-reflective film layer 80 is used to semi-transmit and semi-reflect the light irradiated thereon, especially the light at a large angle will be reflected back, thereby playing the role of converging the light. In some cases, the reflected light can re-enter the color conversion unit 610, converting the unconverted blue light into light of the corresponding color, thereby improving the color purity.

[0054] In the embodiment of the present application, the display panel further includes a second encapsulation layer 90, which is located between the first encapsulation layer 50 and the color conversion layer 60. The second encapsulation layer 90 is used to encapsulate the color conversion layer 60. Optionally, the display panel further includes an adhesive layer 100, which is located between the first encapsulation layer 50 and the second encapsulation layer 90, and is used to bond the first encapsulation layer 50 and the second encapsulation layer 90. In the embodiment of the present application, the preparation temperature of the color conversion unit 610 of the color conversion layer 60 is relatively high. If the color conversion layer 60 is directly prepared in situ on the first encapsulation layer 50, the light-emitting unit 310 will be damaged. Therefore, the color conversion layer 60 is prepared separately, and then the color conversion layer 60 is bonded to the side of the first encapsulation layer 50 away from the substrate 10.

[0055] Figure 5 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 5 The display panel shown is Figure 2 The difference between the display panels shown is that the first portion 410 blocks the second electrode layer (the second electrode layer is disconnected at region A), and the second electrode layer overlaps the first portion 410. In the embodiment of the present application, the material of the first portion 410 includes a conductive material, and the second electrode layer overlaps the first portion 410, so that the entire surface of the second electrode layer can be turned on without affecting the voltage drop of the screen, thereby ensuring the uniformity of the brightness of the screen. Therefore, in the embodiment of the present application, whether the second electrode layer is blocked or not will not affect the voltage drop of the screen, thereby ensuring the uniformity of the brightness of the screen.

[0056] Figure 6 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 6 The display panel shown is Figure 2 The difference of the display panel shown is that the light emitting layer 3122 is located at the bottom of the pixel opening 201, that is, the light emitting layer 3122 is not evaporated on the entire surface, but only evaporated on the bottom wall 2011 of the pixel opening 201. In this case, since the common layer (the first transmission layer 3121 and the second transmission layer 3123) is evaporated on the entire surface, it is still necessary to disconnect the common layer. Therefore, Figure 6 The first portion 410 disconnects the common layer (ie, the first transmission layer 3121 and the second transmission layer 3123), which can avoid lateral charge transmission and avoid or reduce electrical crosstalk, thereby improving luminous efficiency.

[0057] In the embodiment of the present application, the cross-sectional shape of the first structure 40 in a direction perpendicular to the substrate 10 includes at least one of a rectangle and a trapezoid. Figure 7 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Figure 7 The display panel shown is Figure 1 The difference of the display panel shown is that the cross-sectional shape of the first structure 40 in the direction perpendicular to the substrate 10 includes a regular trapezoid. When the first structure 40 is a regular trapezoid, the reflected light can be more easily emitted from the light-emitting side. However, when the first structure 40 is a regular trapezoid, the common layer (i.e., the first transmission layer 3121 and the second transmission layer 3123) cannot be separated. In the embodiment of the present application, for illustration, Figure 7 Only two pixel openings are shown in the figure, and it can be understood that the display panel includes multiple pixel openings. In addition, it should be noted that in order to clearly show the first structure and the second structure, the size of the pixel opening 201 and the pixel defining layer 20 between adjacent pixel openings 201 are not drawn in proportion. In an actual display panel, the size of the pixel opening 201 is larger than the size of the pixel defining layer 20 between adjacent pixel openings 201.

[0058] In the embodiment of the present application, the material of the first structure 40 includes a low-refractive-high-reflective material. The reflectivity of the low-refractive-high-reflective material is greater than or equal to 90% and less than or equal to 98%. Exemplarily, the reflectivity of the low-refractive-high-reflective material is 90%, 92%, 94%, 96%, 98%. Optionally, the material of the first structure 40 is the same as that of the pixel defining layer 20, and they are prepared in the same layer.

[0059] In the embodiment of the present application, the height of the first structure 40 in the direction perpendicular to the substrate 10 is greater than 1.6um, and the projection width of the first structure 40 on the substrate 10 is greater than or equal to 5um and less than or equal to 10um. Exemplarily, the height of the first structure 40 in the direction perpendicular to the substrate 10 is 1.6um, 2um, 2.5um, 3um, etc. The projection width of the first structure 40 on the substrate 10 is 5um, 6um, 7um, 8um, 9um, 10um, etc. In the embodiment of the present application, in order to better reflect light, the first structure 40 is arranged at a position close to the pixel opening 201. Optionally, the distance between the orthographic projection of the first structure 40 on the substrate 10 and the orthographic projection of the pixel opening 201 on the substrate 10 is greater than or equal to 3um and less than or equal to 5um. Exemplarily, the distance between the orthographic projection of the first structure 40 on the substrate 10 and the orthographic projection of the pixel opening 201 on the substrate 10 is 3um, 3.5um, 4um, 4.5um. In this way, large-angle light can be better blocked to prevent large-angle light from irradiating onto adjacent light-emitting units.

[0060] like Figure 7 As shown, the light-emitting functional layer 312 includes a first transmission layer 3121, a light-emitting layer 3122, and a second transmission layer 3123 which are sequentially stacked in a direction away from the substrate 10. The first transmission layer 3121 and the second transmission layer 3123 cover the bottom wall 2011 and the side wall 2012 of the pixel opening 201, and extend to at least part of the surface of the pixel defining layer 20 between two adjacent pixel openings 201. Figure 7 In the embodiment of the present application, the orthographic projection of the light-emitting layer 3122 on the substrate 10 overlaps with the orthographic projection of the common layer (for example, the first transport layer 3121 or the second transport layer 3123) on the substrate 10, that is, the light-emitting layer 3122 is formed by a whole-surface evaporation process. In the embodiment of the present application, the first electrode 311 is an anode, the second electrode 313 is a cathode, the first transport layer 3121 includes a hole transport layer, and the second transport layer includes an electron transport layer. It can be understood that the common layer may also include other film layers, for example, an injection layer. Exemplarily, the common layer also includes a first injection layer and a second injection layer, the first injection layer is located between the first electrode 311 and the first transport layer 3121, and the second injection layer is located between the second electrode 313 and the second transport layer 3123. Optionally, the material of the first transport layer 3121 and the second transport layer 3123 includes an organic material. The material of the first injection layer and the second injection layer includes an inorganic material. Since the first transport layer 3121 and the second transport layer 3123 are formed by whole-surface evaporation, lateral charge transfer is likely to occur, resulting in electrical crosstalk.

[0061] In order to avoid electrical crosstalk, the side of the pixel defining layer 20 in the embodiment of the present application away from the substrate 10 includes a second structure 210, and the second structure 210 is a groove structure. The orthographic projection of the second structure 210 on the substrate 10 surrounds the orthographic projection of the pixel opening 201 on the substrate 10. In the embodiment of the present application, the orthographic projection of the second structure 210 on the substrate 10 does not overlap with the orthographic projection of the first structure 40 on the substrate 10. In the embodiment of the present application, the cross-sectional shape of the second structure 210 in the direction perpendicular to the substrate 10 includes a regular trapezoid. By providing the second structure 210, when the light-emitting functional layer 312 is evaporated, the light-emitting functional layer 312 can be disconnected at the second structure 210, that is, the second structure 210 isolates the light-emitting functional layer 312 (including the first transmission layer 3121, the light-emitting layer 3122 and the second transmission layer 3123). In the embodiment of the present application, the width of the second structure 210 away from the substrate 10 is greater than or equal to 4um, and the ratio of the height of the second structure 210 in the direction perpendicular to the substrate 10 to the height of the pixel defining layer 20 in the direction perpendicular to the substrate 10 is greater than or equal to 0.5 and less than or equal to 0.8. Exemplarily, the width of the second structure 210 away from the substrate 10 is 4um, 4.5um, 5um, 6um, etc. The ratio of the height of the second structure 210 in the direction perpendicular to the substrate 10 to the height of the pixel defining layer 20 in the direction perpendicular to the substrate 10 is 0.5, 0.6, 0.7, 0.8. That is, in the embodiment of the present application, the first structure 40 reflects light to avoid or reduce optical crosstalk, thereby improving the luminous efficiency. The second structure 210 cuts off the common layer to avoid lateral charge transfer, avoid or reduce electrical crosstalk, thereby improving the luminous efficiency.

[0062] In the embodiment of the present application, the second electrodes 313 of two adjacent light-emitting units 310 are electrically connected to form a second electrode layer, and the second electrode layer is disconnected at the second structure 210. If the second electrode layer cannot be connected over the entire surface, uneven brightness display will be caused. Therefore, the second structure 210 partially isolates the second electrode layer, which will not affect the full surface connectivity of the second electrode layer.

[0063] In the embodiment of the present application, the orthographic projection of the second structure 210 on the substrate 10 is arranged in a circular (or annular) shape, or the orthographic projection of the second structure 210 on the substrate 10 is arranged in a polygonal shape. Here, the orthographic projection of the second structure 210 on the substrate 10 is arranged in a circular (or annular) shape as an example for description. Figure 8a and Figure 8b They are respectively schematic top views of the second structure provided in one embodiment of the present application. Figure 8a As shown, the orthographic projection of the second structure 210 on the substrate 10 discontinuously surrounds the orthographic projection of the pixel opening 201 on the substrate 10. Figure 8bAs shown, for any pixel opening 201, the pixel defining layer 20 includes at least two groups of second structures 210 that discontinuously surround the pixel opening 201, and the at least two groups of second structures 210 include a first group of second structures 211 and a second group of second structures 212, and the orthographic projections of the second group of second structures 212 on the substrate 10 discontinuously surround the orthographic projections of the first group of second structures 211 on the substrate 10. The first group of second structures 211 includes a plurality of first substructures 2111 disposed at intervals, and the second group of second structures 212 includes a plurality of second substructures 2121 disposed at intervals, and the orthographic projections of the first substructures 2111 on the substrate 10 and the orthographic projections of the second substructures 2121 on the substrate 10 are arranged in an alternating manner, so that the second electrode layer can be ensured not to be completely disconnected, and the entire surface of the second electrode layer can be ensured to be conductive, thereby improving the brightness uniformity of the display panel.

[0064] Fig. 9 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Fig. 9 The display panel shown is Figure 7 The difference between the display panel shown is that the display panel further includes a first conductive layer 430 and a second conductive layer 440 which are sequentially stacked and located on the side of the first structure 40 away from the substrate, the orthographic projections of the first conductive layer 430 and the second conductive layer 440 on the substrate 10 overlap, and the first conductive layer 430 covers the surface of the first structure 40 and at least part of the surface of the pixel defining layer 20. In the embodiment of the present application, the first electrode 311 includes a first sub-electrode 3111, a second sub-electrode 3112 and a third sub-electrode 3113 which are sequentially stacked and located in a direction away from the substrate 10, and the first sub-electrode 3111 is located on the side of the pixel defining layer 20 close to the substrate 10 and is at least partially exposed in the pixel opening 201. At least part of the second sub-electrode 3112 and at least part of the third sub-electrode 3113 are located on the side of the bottom wall 2011 of the pixel opening 201 away from the substrate 10 and are electrically connected to the first sub-electrode 3111; the material of the first conductive layer 430 is the same as that of the second sub-electrode 3112, and the material of the second conductive layer 440 is the same as that of the third sub-electrode 3113. The material of the first conductive layer 430 includes silver, and the material of the second conductive layer 440 includes indium tin oxide. In the embodiment of the present application, the reflectivity of light can be improved by providing the first conductive layer 430, thereby improving the light extraction efficiency.

[0065] In the embodiment of the present application, the first conductive layer 430 and the second sub-electrode 3112 are prepared in the same layer, and the first conductive layer 430 and the second sub-electrode 3112 are disconnected. The second conductive layer 440 and the third sub-electrode 3113 are prepared in the same layer, and the second conductive layer 440 and the third sub-electrode 3113 are disconnected. The disconnection position of the first conductive layer 430 and the second sub-electrode 3112 is located at the pixel defining layer 20 between the first structure 40 and the pixel opening 201. The disconnection position of the second conductive layer 440 and the third sub-electrode 3113 is located at the pixel defining layer 20 between the first structure 40 and the pixel opening 201. In this way, it can be avoided that the first electrode 311 is connected on the entire surface, causing the position other than the pixel opening 201 (for example, part of the surface of the pixel defining layer 20) to emit light, causing optical crosstalk.

[0066] In the embodiment of the present application, the first sub-electrode 3111 is first prepared, and then the pixel defining layer 20 is prepared, the pixel defining layer 20 is etched to obtain the pixel opening 201, and then the second sub-electrode 3112 and the third sub-electrode 3113 are prepared to obtain the first electrode 311. The steps of preparing the second sub-electrode 3112 and the third sub-electrode 3113 include: sequentially evaporating the material of the second sub-electrode 3112 and the material of the third sub-electrode 3113 on the entire surface of the pixel defining layer 20 facing away from the substrate 10, and forming a gap between the first structure 40 and the pixel opening 201 (such as Fig. 9 The material of the second sub-electrode 3112 and the material of the third sub-electrode 3113 in the area B) are etched away to obtain the first conductive layer 430 and the second sub-electrode 3112, and the second conductive layer 440 and the third sub-electrode 3113, respectively, wherein at least part of the second sub-electrode 3112 and at least part of the third sub-electrode 3113 are located on the side of the bottom wall 2011 of the pixel opening 201 away from the substrate 10, and are electrically connected to the first sub-electrode 3111; in this way, the preparation process can be simplified. In addition, during etching, the pixel defining layer 20 can be partially etched to form the second structure 210, so that the preparation process is further simplified, and the second structure 210 can isolate the common layer prepared subsequently to avoid electrical interference. That is, in the embodiment of the present application, by preparing the first electrode 311 in steps, a reflective material is deposited on the surface of the pixel defining layer 20 and the first structure 40, which can further improve the reflection efficiency; in addition, in the process of etching to form the second sub-electrode 3112 and the third sub-electrode 3113, the pixel defining layer 20 is simultaneously etched to form the second structure 210. The embodiment of the present application does not need to add an I-shaped structure or a total reflection lens structure, and the design structure and process flow of the embodiment of the present application can solve the problems of optical crosstalk and electrical crosstalk at the same time.

[0067] Fig.10 It is a schematic diagram of the cross-sectional structure of a display panel provided in yet another embodiment of the present application. Fig.10The difference between the display panel shown in FIG. 8 and the display panel shown in FIG. 8 is that the display panel further includes an adhesive layer 100, a second encapsulation layer 90, a light conversion layer 60, a filter layer 70 and a semi-transparent and semi-reflective film layer 80 which are sequentially stacked and arranged on the side of the first encapsulation layer 50 away from 10. For more descriptions of the adhesive layer 100, the second encapsulation layer 90, the light conversion layer 60, the filter layer 70 and the semi-transparent and semi-reflective film layer 80, please refer to the present application Figure 4 The relevant description of some parts will not be repeated here.

[0068] In the embodiment of the present application, the orthographic projection of the first structure 40 on the substrate 10 is arranged in a circular (or annular) shape, or the orthographic projection of the first structure 40 on the substrate 10 is arranged in a polygonal shape. Here, the orthographic projection of the first structure 40 on the substrate 10 is arranged in a circular (or annular) shape as an example for description. Figures 11a to 11d They are respectively schematic top views of the first structure provided in one embodiment of the present application. Fig.11a and Fig.11b As shown, the orthographic projection of the first structure 40 on the substrate 10 continuously surrounds the orthographic projection of the pixel opening 201 on the substrate 10. Optionally, for any pixel opening 201, the display panel includes at least two groups of first structures 40 that continuously surround the pixel opening 201, such as Fig.11b As shown, the display panel includes a first group of first structures 41 and a second group of first structures 42, and the orthographic projections of the second group of first structures 42 on the substrate 10 continuously surround the orthographic projections of the first group of first structures 41 on the substrate 10. Fig.11c and Fig.11d As shown, the orthographic projection of the first structure 40 on the substrate 10 discontinuously surrounds the orthographic projection of the pixel opening 201 on the substrate 10. Optionally, for any pixel opening 201, the display panel includes at least two groups of first structures 40 discontinuously surrounding the pixel opening 201, such as Fig.11dAs shown, the display panel includes a first group of first structures 41 and a second group of first structures 42, and the orthographic projection of the second group of first structures 42 on the substrate 10 discontinuously surrounds the orthographic projection of the first group of first structures 41 on the substrate 10. Optionally, the first group of first structures 41 includes a plurality of third substructures 415 arranged at intervals, and the second group of first structures 42 includes a plurality of fourth substructures 421 arranged at intervals, and the orthographic projections of the third substructures 415 on the substrate 10 and the orthographic projections of the fourth substructures 421 on the substrate 10 are arranged alternately. In the embodiment of the present application, when the first structure 40 only plays a reflective role, in order to ensure the reflective effect, the first structure 40 can be set to continuously surround the pixel opening 201. When the first structure 40 can not only reflect but also isolate the common layer, in order to ensure the isolation effect, the first structure 40 can also be set to continuously surround the pixel opening 201. In some embodiments, the first structure 40 may isolate the second electrode layer. If the second electrode layer cannot be connected over the entire surface, it will cause uneven brightness of the display panel. In some cases, in order to ensure the display effect of the second electrode layer, the first structure 40 can be set to be discontinuous around the pixel opening 201, and two layers of staggered first structures 40 are set. In this way, the common layer of the light-emitting functional layer 312 can be isolated, and more large-angle light can be reflected, taking into account the reflection effect and the isolation function, thereby improving the light-emitting efficiency.

[0069] In the present application, the light-emitting functional layer 312 may include a single light-emitting functional layer, or include multiple light-emitting functional sublayers, both of which are applicable to the technical solution of the present application. Each functional sublayer includes a first transmission layer, a light-emitting layer, and a second transmission layer. Specifically, Fig.12 shown.

[0070] Fig.12 Schematic diagram of the structure of the light-emitting functional layer provided in one embodiment of the present application. Fig.12 As shown, the light-emitting functional layer 312 includes a plurality of stacked light-emitting functional sublayers 3120 and a charge generation layer 3124 disposed between adjacent light-emitting functional sublayers 3120. Each light-emitting functional sublayer 3120 includes a first transport layer 3121, a light-emitting layer 3122, and a second transport layer 3123. Fig.12 As shown, the light-emitting functional layer 312 includes a first transport layer 3121, a first transport layer 3121, a first transport layer 3121, a light-emitting layer 3122, a second transport layer 3123, a charge generation layer 3124, a light-emitting layer 3122, a second transport layer 3123, a charge generation layer 3124, a light-emitting layer 3122, and a second transport layer 3123, which are stacked in sequence. In other embodiments, the light-emitting functional layer 312 may also include other numbers of light-emitting functional sublayers.

[0071] In a second aspect, an embodiment of the present application provides a display device, wherein the display device includes the display panel described in the above embodiment.

[0072] Fig.13 is a schematic diagram of the structure of a display device provided by an embodiment of the present application. Fig.13 As shown, the display device 1300 is a product with an image display function. For example, the display device 1300 can be used to display static images, such as pictures or photos. The display device 1300 can also be used to display dynamic images, such as videos.

[0073] The display device 1300 may be a laptop computer, a mobile phone, a handheld or portable computer, a camera, a camcorder, a vehicle-mounted smart central control screen, a calculator, a smart watch, a GPS navigator, an electronic photo, an electronic billboard or sign, a projector, etc.

[0074] The display device 1300 includes a display substrate provided by any of the above embodiments, which may be an organic light emitting diode display substrate or a quantum dot electroluminescent display substrate.

[0075] In addition, the display device 1300 may also have functions such as taking pictures, recording videos, fingerprint recognition, and face recognition. Accordingly, the display device 1300 also includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, and the like.

[0076] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, characterized in that: include: substrate; A pixel defining layer, located on one side of the substrate, the pixel defining layer is surrounded to form a plurality of pixel openings; a light emitting device layer, the light emitting device layer comprising a plurality of light emitting units, at least a portion of the light emitting units being disposed in the pixel opening; The first structure is located on the side of the pixel defining layer facing away from the substrate. The side of the first structure close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the first structure. The orthographic projection of the first structure on the substrate surrounds the orthographic projection of the pixel opening on the substrate.

2. The display panel according to claim 1, characterized in that: Along the direction away from the substrate, the first structure includes a first portion and a second portion stacked in sequence, and at least the side of the second portion close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the second portion; Preferably, the cross-sectional shape of the second portion in a direction perpendicular to the substrate includes at least one of a rectangle, a trapezoid, a semicircle, or a semi-ellipse; Preferably, the orthographic projection of the second portion on the substrate is located within the orthographic projection of the first portion on the substrate, or the orthographic projection of the second portion on the substrate overlaps with the orthographic projection of the first portion on the substrate; Preferably, the display panel further comprises a light conversion layer, the light conversion layer is located on a side of the light emitting device layer away from the substrate, the distance from the surface of the first portion away from the substrate to the light conversion layer is a first distance, and the height of the second portion in a direction perpendicular to the substrate is greater than or equal to 0.7×the first distance and less than the first distance; Preferably, the material of the second part includes a metal material or a material having a reflectivity greater than or equal to 90% and less than or equal to 98%; Preferably, the cross-sectional shape of the first portion in a direction perpendicular to the substrate includes at least one of an I-shape and an inverted trapezoid; Preferably, the height of the first portion in a direction perpendicular to the substrate is greater than or equal to 0.7 um, and the projection width of the first portion on the substrate is greater than or equal to 5 um; Preferably, the first portion comprises a first sub-portion and a second sub-portion which are sequentially stacked in a direction away from the substrate, and the orthographic projection of the first sub-portion on the substrate is located within the orthographic projection of the second sub-portion on the substrate; Preferably, the first portion further comprises a third sub-portion, the third sub-portion is located on a side of the first sub-portion close to the substrate, and the orthographic projection of the first sub-portion on the substrate is located within the orthographic projection of the third sub-portion on the substrate; Preferably, the material of the first sub-section includes aluminum, and the materials of the second sub-section and the third sub-section include titanium.

3. The display panel according to claim 1, characterized in that: The cross-sectional shape of the first structure in a direction perpendicular to the substrate includes at least one of a rectangle or a trapezoid; Preferably, the cross-sectional shape of the first structure in a direction perpendicular to the substrate comprises a regular trapezoid; Preferably, the material of the first structure includes a material having a reflectivity greater than or equal to 90% and less than or equal to 98%; Preferably, the material of the first structure is the same as that of the pixel defining layer, and they are prepared in the same layer; Preferably, the height of the first structure in a direction perpendicular to the substrate is greater than 1.6 um, and the projection width of the first structure on the substrate is greater than or equal to 5 um and less than or equal to 10 um; Preferably, a distance between an orthographic projection of the first structure on the substrate and an orthographic projection of the pixel opening on the substrate is greater than or equal to 3 um and less than or equal to 5 um.

4. The display panel according to claim 3, characterized in that: It also includes a first conductive layer and a second conductive layer stacked in sequence on a side of the first structure away from the substrate, wherein the orthographic projections of the first conductive layer and the second conductive layer on the substrate overlap, and the first conductive layer covers a surface of the first structure and at least a portion of a surface of the pixel defining layer; Preferably, along a direction away from the substrate, the light-emitting unit comprises a first electrode, a light-emitting functional layer, and a second electrode which are sequentially stacked, the first electrode comprises a first sub-electrode, a second sub-electrode, and a third sub-electrode which are sequentially stacked along a direction away from the substrate, the material of the first conductive layer is the same as the material of the second sub-electrode, and the material of the second conductive layer is the same as the material of the third sub-electrode; Preferably, the first sub-electrode is located on a side of the pixel defining layer close to the substrate, and is at least partially exposed in the pixel opening; At least part of the second sub-electrode and at least part of the third sub-electrode are located on a side of the bottom wall of the pixel opening away from the substrate, and are electrically connected to the first sub-electrode; Preferably, the first conductive layer and the second sub-electrode are prepared in the same layer, and the first conductive layer and the second sub-electrode are disconnected; the second conductive layer and the third sub-electrode are prepared in the same layer, and the second conductive layer and the third sub-electrode are disconnected; Preferably, the disconnection position between the first conductive layer and the second sub-electrode is located at the pixel defining layer between the first structure and the pixel opening; The disconnection position between the second conductive layer and the third sub-electrode is located at the pixel defining layer between the first structure and the pixel opening; Preferably, the material of the first conductive layer includes silver, and the material of the second conductive layer includes indium tin oxide.

5. The display panel according to claim 3 or 4, characterized in that: The pixel defining layer comprises a second structure on a side away from the substrate, the second structure is a groove structure, and the orthographic projection of the second structure on the substrate surrounds the orthographic projection of the pixel opening on the substrate; Preferably, the cross-sectional shape of the second structure in a direction perpendicular to the substrate comprises a regular trapezoid; Preferably, the width of the second structure away from the substrate is greater than or equal to 4 um, and the ratio of the height of the second structure in a direction perpendicular to the substrate to the height of the pixel defining layer in a direction perpendicular to the substrate is greater than or equal to 0.5 and less than or equal to 0.8; Preferably, along a direction away from the substrate, the light-emitting unit comprises a first electrode, a light-emitting functional layer and a second electrode sequentially stacked on the substrate, the light-emitting functional layer comprises a common layer and a light-emitting layer stacked, the common layer covers the bottom wall and the side wall of the pixel opening, and extends to at least a portion of the surface of the pixel defining layer between two adjacent pixel openings; The second structure at least separates the common layer; Preferably, the orthographic projection of the light-emitting layer on the substrate overlaps with the orthographic projection of the common layer on the substrate, and the second structure separates the light-emitting layer and the common layer; Preferably, the second electrodes of two adjacent light-emitting units are electrically connected to form a second electrode layer, and the second structure partially separates the second electrode layer; Preferably, the orthographic projection of the second structure on the substrate discontinuously surrounds the orthographic projection of the pixel opening on the substrate; Preferably, for any of the pixel openings, the pixel defining layer comprises at least two groups of second structures discontinuously surrounding the pixel opening, the at least two groups of second structures comprising a first group of second structures and a second group of second structures, and the orthographic projections of the second group of second structures on the substrate discontinuously surrounding the orthographic projections of the first group of second structures on the substrate; Preferably, the first group of second structures includes a plurality of first substructures disposed at intervals, and / or the second group of second structures includes a plurality of second substructures disposed at intervals, and the orthographic projections of the first substructures on the substrate and the orthographic projections of the second substructures on the substrate are arranged alternately.

6. The display panel according to claim 2, characterized in that: Along the direction away from the substrate, the light-emitting unit comprises a first electrode, a light-emitting functional layer and a second electrode stacked in sequence on the substrate, the light-emitting functional layer comprises a common layer and a light-emitting layer stacked in sequence, the common layer covers the bottom wall and the side wall of the pixel opening, and extends to at least a portion of the surface of the pixel defining layer between two adjacent pixel openings; the first portion at least blocks the common layer; Preferably, the light emitting layer is at least located on the bottom wall of the pixel opening; Preferably, the orthographic projection of the light-emitting layer on the substrate overlaps with the orthographic projection of the common layer on the substrate, and the first portion separates the common layer and the light-emitting layer; Preferably, the second electrodes of two adjacent light-emitting units are electrically connected to form a second electrode layer, and the second electrode layer extends along the side wall of the first structure and covers the first structure; or, the first part separates the second electrode layer, and the second electrode layer overlaps the first part, and the material of the first part includes a conductive material.

7. The display panel according to claim 1, characterized in that: The orthographic projection of the first structure on the substrate continuously surrounds the orthographic projection of the pixel opening on the substrate; Preferably, for any of the pixel openings, the display panel includes at least two groups of the first structures continuously surrounding the pixel opening, and the at least two groups of the first structures include a first group of first structures and a second group of first structures, and the orthographic projections of the second group of first structures on the substrate continuously surround the orthographic projections of the first group of first structures on the substrate.

8. The display panel according to claim 1, characterized in that: The orthographic projection of the first structure on the substrate discontinuously surrounds the orthographic projection of the pixel opening on the substrate; Preferably, for any of the pixel openings, the display panel comprises at least two groups of the first structures discontinuously surrounding the pixel opening, the at least two groups of the first structures comprising a first group of first structures and a second group of first structures, and the orthographic projections of the second group of first structures on the substrate discontinuously surrounding the orthographic projections of the first group of first structures on the substrate; Preferably, the first group of first structures includes a plurality of third substructures arranged at intervals, the second group of first structures includes a plurality of fourth substructures arranged at intervals, and the orthographic projections of the third substructures on the substrate are arranged alternately with the orthographic projections of the fourth substructures on the substrate.

9. The display panel according to claim 1, characterized in that: Along the direction away from the substrate, the light-emitting unit includes a first electrode, a light-emitting functional layer and a second electrode which are sequentially stacked on the substrate, the light-emitting functional layer includes a common layer and a light-emitting layer which are stacked, and the light-emitting functional layer covers the bottom wall and the side wall of the pixel opening and extends to at least a part of the surface of the pixel defining layer between two adjacent pixel openings; Preferably, the common layer includes a first transmission layer and a second transmission layer, and the first transmission layer and the second transmission layer are respectively located on both sides of the light-emitting layer; Preferably, the materials of the first transmission layer and the second transmission layer include organic materials; Preferably, the common layer further comprises a first injection layer and a second injection layer, the first injection layer is located between the first electrode and the first transmission layer, and the second injection layer is located between the second electrode and the second transmission layer; Preferably, the light-emitting functional layer comprises a plurality of stacked light-emitting functional sublayers and a charge generation layer arranged between adjacent light-emitting functional sublayers; Preferably, the charge generation layer comprises at least one of an anode charge generation layer and a cathode charge generation layer.

10. The display panel according to claim 1, characterized in that: It also includes a color conversion layer, which is located on the side of the light-emitting device layer away from the substrate, the color conversion layer includes a plurality of color conversion units, the orthographic projection of the color conversion unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, the color conversion unit corresponds to the light-emitting unit, and the light-emitting unit is used to excite the corresponding color conversion unit to emit light; Preferably, the color conversion unit includes a red color conversion unit and a green color conversion unit, the color conversion layer further includes a light-transmitting unit, the orthographic projection of the light-transmitting unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, the light-transmitting unit corresponds to the light-emitting unit, and the light-transmitting unit is used to transmit light emitted by the corresponding light-emitting unit; Preferably, the color conversion layer further comprises a first retaining wall structure, and the first retaining wall structure is located between adjacent color conversion units, or between the color conversion unit and the light-transmitting unit; Preferably, the display panel further comprises a filter layer, the filter layer is located on a side of the color conversion layer away from the substrate, the filter layer comprises a plurality of filter units, the orthographic projection of the filter unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate, and the color of the filter unit corresponding to the same light-emitting unit is the same as the color of the light emitted by the color conversion unit or the same as the color of the light transmitted by the light-transmitting unit; Preferably, the filter layer further comprises a plurality of second retaining wall structures, wherein the second retaining wall structures are located between adjacent filter units; Preferably, the display panel further comprises a semi-transmissive and semi-reflective film layer, and the semi-transmissive and semi-reflective film layer is located on a side of the filter layer away from the substrate; Preferably, the display panel further comprises a first encapsulation layer, the first encapsulation layer is located between the color conversion layer and the light-emitting device layer, and the first encapsulation layer comprises a first inorganic encapsulation layer, an organic encapsulation layer, and a second inorganic encapsulation layer which are sequentially stacked in a direction away from the substrate; Preferably, the display panel further comprises a second encapsulation layer, wherein the second encapsulation layer is located between the first encapsulation layer and the color conversion layer; Preferably, the display panel further includes an adhesive layer located between the first encapsulation layer and the second encapsulation layer.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 10.

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