Display panel, preparation method thereof and display device

Abstract

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the pixel definition layer is located on one side of the substrate, and a plurality of pixel openings are defined by the pixel definition layer; the light-emitting device layer comprises a plurality of light-emitting units, at least parts of the light-emitting units are located in the pixel openings, and each light-emitting unit comprises a first electrode, a light-emitting function layer and a second electrode which are sequentially arranged in a stacked mode in the direction away from the substrate; the isolation column is located on the side, away from the substrate, of the pixel definition layer, the orthographic projection of the isolation column on the substrate surrounds the orthographic projection of the pixel opening on the substrate, and the material of at least part of the film layer of the isolation column is the same as the material of at least part of the film layer of the first electrode. According to the technical scheme, the display effect can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technologies, and particularly relates to a display panel, a preparation method thereof, and a display device. Background Art

[0002] Compared with the Organic Light Emitting Diode (OLED) display technology, the Organic Light Emitting Diode (OLED) combined with the Quantum Dot (QD) display technology can improve the color gamut value and viewing angle of the display screen, and has obvious advantages in large and medium-sized display screens. Especially when the OLED selects a blue light emitting unit, the red, green, and blue three-color spectra are discrete, the color purity is high, and the color reproducibility is good. However, there are some problems in the QD-OLED display panel. Summary of the Invention

[0003] In order to solve the above problems, embodiments of the present application provide a display panel, a preparation method thereof, and a display device.

[0004] In a first aspect, embodiments of the present application provide a display panel, including: a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings; a light emitting device layer, the light emitting device layer including a plurality of light emitting units, at least a part of the light emitting units being located within the pixel openings, the light emitting units including a first electrode, a light emitting functional layer, and a second electrode sequentially stacked along a direction away from the substrate; an isolation column located on a side of the pixel definition layer away from the substrate, a positive projection of the isolation column on the substrate surrounding a positive projection of the pixel opening on the substrate, and a material of at least a part of a film layer of the isolation column being the same as a material of at least a part of a film layer of the first electrode.

[0005] In combination with the first aspect, at least a part of the film layer of the isolation column is disposed on the same layer as at least a part of the film layer of the first electrode; preferably, the isolation column includes a first part and a second part stacked in sequence along the direction away from the substrate, the first electrode includes a first conductive layer, a second conductive layer, and a third conductive layer stacked in sequence along the direction away from the substrate, the material of the first part is the same as the material of the second conductive layer, and the material of the second part is the same as the material of the third conductive layer; preferably, the first conductive layer is located on the side of the pixel definition layer close to the substrate and at least partially exposed in the pixel opening; preferably, the first part and the second conductive layer are on the same layer and are disconnected, and / or, the second part and the third conductive layer are on the same layer and are disconnected; preferably, the second conductive layer and the third conductive layer are located within the pixel opening; and the second conductive layer covers at least the bottom wall of the pixel opening, and the orthographic projection of the third conductive layer on the substrate covers the orthographic projection of the second conductive layer on the substrate; preferably, the materials of the first conductive layer and the third conductive layer include transparent conductive materials; the material of the second conductive layer includes a metal material; preferably, the materials of the first conductive layer and the third conductive layer include indium tin oxide; the material of the second conductive layer includes silver; preferably, the height of the first part in the direction perpendicular to the substrate is greater than or equal to and less than or equal to and / or, the height of the second part in the direction perpendicular to the substrate is greater than or equal to and less than or equal to

[0006] In combination with the first aspect, the isolation column separates at least a part of the film layer of the light-emitting functional layer; preferably, the light-emitting functional layer includes 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 part of the surface of the pixel definition layer between two adjacent pixel openings, and the isolation column separates at least 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 isolation column separates the light-emitting layer and the common layer; preferably, the orthographic projection of the second electrode on the substrate covers the orthographic projection of the pixel opening on the substrate and at least a part of the orthographic projection of the pixel definition layer between two adjacent pixel openings on the substrate, and the isolation column separates the second electrode; preferably, the material of the isolation column includes a conductive material, and the second electrode is electrically connected to the isolation column; preferably, the isolation column includes a first part and a second part stacked in sequence along the direction away from the substrate, the orthographic projection of the first part on the substrate is located within the orthographic projection of the second part on the substrate, and the second electrode is electrically connected to at least the first part; preferably, the cross-sectional shape of the isolation column in the direction perpendicular to the substrate includes a T shape; preferably, the cross-sectional shape of the first part in the direction perpendicular to the substrate includes a rectangle or a regular trapezoid; the cross-sectional shape of the second part in the direction perpendicular to the substrate includes a rectangle or a regular trapezoid; preferably, the width of the orthographic projection of the isolation column on the substrate is greater than or equal to 5 μm and less than or equal to 10 μm.

[0007] In combination with the first aspect, the positive projection of the isolation pillar on the substrate continuously surrounds the positive projection of the pixel opening on the substrate; preferably, for any pixel opening, the display panel includes at least two isolation pillars arranged at intervals, and the at least two isolation pillars include a first isolation pillar and a second isolation pillar, and the positive projection of the second isolation pillar on the substrate continuously surrounds the positive projection of the first isolation pillar on the substrate; preferably, the distance between the positive projection of the first isolation pillar on the substrate and the positive projection of the second isolation pillar on the substrate is greater than or equal to 5 μm and less than or equal to 10 μm.

[0008] In combination with the first aspect, the side surface of the isolation pillar close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the isolation pillar; preferably, the isolation pillar includes a first part and a second part stacked in sequence along the direction away from the substrate, and the side surface of the first part and / or the second part close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the isolation pillar; preferably, the material of the first part includes a metal material; and / or, the material of the second part includes a transparent conductive material; preferably, the material of the first part includes silver; and / or, the material of the second part includes indium tin oxide; preferably, the display panel further includes a support pillar, the support pillar is located between the pixel definition layer and the isolation pillar, and the positive projection of the support pillar on the substrate is located within the positive projection of the pixel definition layer on the substrate; the positive projection of the isolation pillar on the substrate is located within the positive projection of the support pillar on the substrate; preferably, the material of the support pillar includes an organic material or an inorganic material; preferably, the material of the support pillar includes an organic material with a reflectivity greater than or equal to 80%, and the side surface of the support pillar close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the support pillar; preferably, the distance between the positive projection of the isolation pillar on the substrate and the positive projection of the pixel opening on the substrate is greater than or equal to 4 μm and less than or equal to 6 μm.

[0009] In combination with the first aspect, the light-emitting functional layer includes a common layer and a light-emitting layer stacked, the light-emitting functional layer covers the side wall and the bottom wall of the pixel opening, and extends to at least part of the surface of the pixel definition 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 further 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 sub-layers and a charge generation layer disposed between adjacent light-emitting functional sub-layers; preferably, the charge generation layer includes an anode charge generation layer or a cathode charge generation layer.

[0010] In combination with the first aspect, multiple light-emitting units emit light of a single color. The display panel further includes a color conversion layer located on the side of the light-emitting device layer away from the substrate. The color conversion layer includes multiple color conversion units, and the color conversion layer corresponds to the light-emitting 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 light-emitting unit is configured 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, and 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 configured to transmit the light emitted by the corresponding light-emitting unit. Preferably, the color conversion layer further includes a first barrier structure located between adjacent color conversion units or between the color conversion unit and the light-transmitting unit. Preferably, the display panel further includes a color filter layer located on the side of the color conversion layer away from the substrate. The color filter layer includes multiple color filter units, and the orthographic projection of the color filter unit on the substrate at least partially overlaps with the orthographic projection of the light-emitting unit on the substrate. The color of the color 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 color filter layer further includes multiple second barrier structures located between adjacent color filter units. Preferably, the display panel further includes a semi-transmissive and semi-reflective film layer located on the side of the color filter layer away from the substrate. Preferably, the display panel further includes a first encapsulation layer located between the color conversion layer and the light-emitting device layer. The first encapsulation layer includes a first sub-encapsulation layer, a second sub-encapsulation layer, and a third sub-encapsulation layer stacked in sequence along the direction away from the substrate. Preferably, the materials of the first sub-encapsulation layer and the third sub-encapsulation layer include inorganic materials; and / or, the material of the second sub-encapsulation layer includes an organic material. Preferably, the display panel further includes a second encapsulation layer 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.

[0011] In a second aspect, an embodiment of the present application provides a method for manufacturing a display panel, including: preparing a plurality of first conductive layers spaced apart on a substrate; preparing a pixel definition layer on a side of the plurality of first conductive layers facing away from the substrate, the pixel definition layer enclosing a plurality of pixel openings, and at least a part of the first conductive layer being exposed through the pixel openings; sequentially preparing a second conductive material layer and a third conductive material layer on a side of the pixel definition layer facing away from the substrate, and performing a first patterning process on the second conductive material layer and the third conductive material layer to obtain a second conductive layer and a third conductive layer located within the pixel openings, and a first part and a second part located on a side of the pixel definition layer facing away from the substrate, the first part and the second part being stacked in sequence along a direction away from the substrate, the first conductive layer, the second conductive layer, and the third conductive layer constituting a first electrode, and the first part and the second part constituting an isolation column; preparing at least a light-emitting functional layer and a second electrode within the pixel openings, and the first electrode, the light-emitting functional layer, and the second electrode constituting a light-emitting unit.

[0012] In combination with the second aspect, the first patterning process includes wet etching; preferably, preparing at least a light-emitting functional layer and a second electrode within the pixel openings includes: sequentially preparing a light-emitting functional layer and a second electrode within the pixel openings and on at least a part of the surface of the pixel definition layer facing away from the substrate, and the isolation column blocking at least a part of the film layer of the light-emitting functional layer; preferably, the isolation column blocks the second electrode, and the second electrode is electrically connected to the isolation column; preferably, before the step of sequentially preparing a second conductive material layer and a third conductive material layer on a side of the pixel definition layer facing away from the substrate, the manufacturing method further includes: preparing a support column on a side of the pixel definition layer facing away from the substrate, a positive projection of the support column on the substrate being located within a positive projection of the pixel definition layer on the substrate, and a positive projection of the isolation column on the substrate being located within a positive projection of the support column on the substrate; preferably, in the step of preparing a plurality of first conductive layers spaced apart on the substrate, the manufacturing method includes: preparing a first conductive material layer on the substrate, and performing a second patterning process on the first conductive material layer to obtain a plurality of first conductive layers; preferably, after preparing the second electrode, the manufacturing method further includes: sequentially preparing a first sub-encapsulation layer, a second sub-encapsulation layer, and a third sub-encapsulation layer on a side of the second electrode facing away from the substrate.

[0013] In a third aspect, an embodiment of the present application further provides a display device, including the above-mentioned display panel; or, including a display panel manufactured according to the manufacturing method of the above-mentioned display panel.

[0014] Through the above technical solution, the material of at least part of the film layer of the isolation column is the same as that of at least part of the film layer of the first electrode, which reduces the types of raw materials used in the preparation process and saves costs. Furthermore, at least part of the film layer of the isolation column is arranged in the same layer as at least part of the film layer of the first electrode. When preparing the isolation column, it can be prepared synchronously with part of the film layer of the first electrode, without the need to add additional steps to prepare the isolation column, thereby reducing the use of mask plates. In an embodiment of the present application, the isolation column can isolate at least part of the film layer of the light-emitting functional layer to avoid electrical crosstalk and improve the color purity of the display panel. In addition, the isolation column can reflect the light irradiated to its surface by the light-emitting unit, avoid large-angle light irradiating to the top of the adjacent light-emitting unit, and avoid electrical interference; and the reflected light is emitted from the top of the light-emitting unit (i.e., emitted at a positive angle), the light converges, and the light emitted at a positive angle can better excite the conversion efficiency of the color conversion layer and improve the light output efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the cross-sectional structure of a display panel provided in one embodiment of the present application.

[0016] 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.

[0017] Figure 3 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 4a 1 is a schematic diagram of a top view of a partial structure of a display panel provided in an embodiment of the present application.

[0019] Figure 4b 1 is a schematic top view of a partial 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 8 It is a schematic diagram of the structure of a light-emitting functional layer provided in one embodiment of the present application.

[0024] Figure 9 It is a schematic diagram of a process of manufacturing a display panel provided in one embodiment of the present application.

[0025] Figures 10a to 10d It is a schematic structural diagram of the preparation process of a display panel provided by an embodiment of the present application.

[0026] Figure 11 It is a schematic structural diagram of a display device provided by an embodiment of the present application.

[0027] Reference numerals: 10 substrate; 20 pixel definition layer; 201 pixel opening; 2011 bottom wall; 2012 side wall; 30 light-emitting device layer; 31 light-emitting unit; 310 first electrode; 311 first conductive layer; 312 second conductive layer; 313 third conductive layer; 320 light-emitting functional layer; first transport layer 321, light-emitting layer 322, second transport layer 323; light-emitting functional sub-layer 3210; charge generation layer 324; 330 second electrode; 40 isolation column; first isolation column 41; second isolation column 42; 410 first part; 420 second part; 50 first encapsulation layer; 510 first sub-encapsulation layer; 520 second sub-encapsulation layer; 530 third sub-encapsulation layer; 60 color conversion layer; 610 color conversion unit; 611 red color conversion unit; 612 green color conversion unit; 620 first barrier structure; 630 light-transmitting unit; 70 filter layer; 710 filter unit; 720 second barrier structure; 810 semi-transmissive and semi-reflective layer; 820 second encapsulation layer; 830 adhesive layer; 90 support column. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] The display principle of the QD-OLED display panel is that the array substrate drives the blue organic light-emitting diode (Blue-Organic Light Emitting Diode, B-OLED) to emit light. When the emitted light irradiates the red quantum dot unit, the quantum dots are excited to emit red light. When the emitted light irradiates the green quantum dot unit, the quantum dots are excited to emit green light, thereby realizing the emission of red, green, and blue light. However, since the common layer of the OLED is prepared by a full-surface evaporation process, there is lateral charge transfer, which further drives the OLEDs of adjacent pixels to emit light, resulting in electrical crosstalk and causing the problem of uneven chromaticity of the screen body.

[0030] In view of the above technical problems, an embodiment of the present application provides a display panel. The display panel includes a substrate; a pixel definition layer located on one side of the substrate, the pixel definition layer enclosing a plurality of pixel openings; a light-emitting device layer, the light-emitting device layer including a plurality of light-emitting units, at least a part of the light-emitting units being located within the pixel openings, the light-emitting units including a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked in a direction away from the substrate; and spacer pillars located on the side of the pixel definition layer facing away from the substrate, the orthographic projection of the spacer pillars on the substrate surrounding the orthographic projection of the pixel openings on the substrate, and at least a part of the film layer material of the spacer pillars being the same as at least a part of the film layer material of the first electrode. In the embodiment of the present application, at least a part of the film layer material of the spacer pillars is the same as at least a part of the film layer material of the first electrode, reducing the types of raw materials used in the manufacturing process and saving costs. Further, at least a part of the film layer of the spacer pillars and at least a part of the film layer of the first electrode are arranged on the same layer. Therefore, when manufacturing the spacer pillars, they can be manufactured synchronously with a part of the film layer of the first electrode, without the need to additionally add steps for manufacturing the spacer pillars, reducing the use of mask plates. In the embodiment of the present application, the spacer pillars can block at least a part of the film layer of the light-emitting functional layer, avoiding electrical crosstalk and improving the color purity of the display panel.

[0031] Figure 1 is a schematic cross-sectional structure diagram of a display panel provided by an embodiment of the present application. As Figure 1 shown, the display panel includes a substrate 10, a pixel definition layer 20, a light-emitting device layer 30, and spacer pillars 40. It should be noted that, in the figure, in order to clearly show the structure of the spacer pillars 40, the sizes of the pixel openings 201 and the pixel definition layer 20 between adjacent pixel openings 201 are not drawn in proportion. In an actual display panel, the size of the pixel openings 201 is larger than the size of the pixel definition layer 20 between adjacent pixel openings 201.

[0032] In the embodiment of the present application, the substrate 10 includes a rigid substrate, for example, a glass substrate; or the substrate 10 includes a flexible substrate, for example, polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), etc.

[0033] The pixel definition layer 20 is located on one side of the substrate 10, and the pixel definition layer 20 encloses a plurality of pixel openings 201. In the embodiment of the present application, the pixel definition 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 201 are shown, and it can be understood that the display panel of the present application includes a plurality of pixel openings 201.

[0034] The light-emitting device layer 30 includes a plurality of light-emitting units 31, and at least a part of the light-emitting units 31 is located within the pixel opening 201. In the embodiments of the present application, the plurality of light-emitting units 31 emit light of a single color, for example, blue light or white light. In the embodiments of the present application, the light-emitting unit 31 includes a first electrode 310, a light-emitting functional layer 320, and a second electrode 330 that are sequentially stacked in a direction away from the substrate 10. At least a part of the film layer of the first electrode 310 (for example, the first conductive layer 311) is located between the substrate 10 and the pixel definition layer 20, and the pixel opening 201 exposes a part of at least a part of the film layer (the first conductive layer 311) of the first electrode 310. In the embodiments of the present application, the first electrode 310 is an anode and the second electrode 330 is a cathode; alternatively, the first electrode 310 is a cathode and the second electrode 330 is an anode.

[0035] The isolation posts 40 are located on the side of the pixel definition layer 20 facing away from the substrate 10, and the orthographic projection of the isolation posts 40 on the substrate 10 surrounds the orthographic projection of the pixel opening 201 on the substrate 10. In the embodiments of the present application, the material of at least a part of the film layer of the isolation posts 40 is the same as the material of at least a part of the film layer of the first electrode 310. In this way, the types of raw materials used in the manufacturing process can be reduced, and the cost can be saved. In addition, at least a part of the film layer of the isolation posts 40 is disposed on the same layer as at least a part of the film layer of the first electrode 310. Therefore, when manufacturing the isolation posts 40, they can be manufactured synchronously with a part of the film layer of the first electrode 310, without additionally increasing the steps for manufacturing the isolation posts 40, and reducing the use of photomasks. In the embodiments of the present application, the isolation posts 40 can block at least a part of the film layer of the light-emitting functional layer 320, avoiding electrical crosstalk and improving the color purity of the display panel.

[0036] In an embodiment of the present application, the isolation pillar 40 includes a first portion 410 and a second portion 420 which are sequentially stacked in a direction away from the substrate 10. The first electrode 310 includes a first conductive layer 311, a second conductive layer 312, and a third conductive layer 313 which are sequentially stacked in a direction away from the substrate 10. The material of the first portion 410 is the same as that of the second conductive layer 312, and the material of the second portion 420 is the same as that of the third conductive layer 313. In an embodiment of the present application, the first conductive layer 311 is located on the side of the pixel definition layer 20 close to the substrate 10 and at least partially exposed in the pixel opening 201. The second conductive layer 312 and the third conductive layer 313 are located within the pixel opening. The first portion 410 and the second conductive layer 312 are on the same layer and are arranged discontinuously. The second portion 420 and the second conductive layer 312 are on the same layer and are arranged discontinuously. That is, the first conductive layer 311 is prepared before the pixel definition layer 20 is prepared, and the second conductive layer 312 and the third conductive layer 313 are prepared after the pixel definition layer 20 is prepared. In this way, the isolation pillar 40 can be prepared synchronously when the second conductive layer 312 and the third conductive layer 313 are prepared. Specifically, the first portion 410 of the isolation pillar 40 is prepared synchronously with the second conductive layer 312; the third conductive layer 313 is prepared synchronously with the second portion 420 of the isolation pillar 40. In an embodiment of the present application, only the preparation sequence of the first electrode 310 is changed, no additional preparation steps are added, the preparation efficiency is improved, and the number of mask plates is reduced, thereby reducing the cost.

[0037] In an embodiment of the present application, the second conductive layer 312 at least covers the bottom wall 2011 of the pixel opening 201. The orthographic projection of the third conductive layer 313 on the substrate 10 covers the orthographic projection of the second conductive layer 312 on the substrate 10. That is, the second conductive layer 312 is in contact with the first conductive layer 311 exposed within the pixel opening 201 to achieve electrical conduction. Since the second conductive layer 312 and the third conductive layer 313 are prepared by a wet etching process, in order to avoid the etching solution from damaging the first conductive layer 311, optionally, the second conductive layer 312 covers the bottom wall 2011 and a part of the side wall 2012 of the pixel opening 201. In this way, the occurrence of display dark spots can be avoided.

[0038] Optionally, the materials of the first conductive layer 311 and the third conductive layer 313 include transparent conductive materials, such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), indium zinc oxide (IZO), etc. The material of the second conductive layer 312 includes metal materials, such as gold, silver, aluminum, etc. Exemplarily, the materials of the first conductive layer 311 and the third conductive layer 313 include indium tin oxide (ITO), and the material of the second conductive layer 312 includes silver.

[0039] Since the thickness of the light-emitting functional layer 320 is relatively thin, the thickness of the isolation pillar 40 does not need to be too thick to block at least part of the film layer of the light-emitting functional layer 320. In the embodiment of the present application, the height of the first part 410 in the direction perpendicular to the substrate 10 is the same as the height of the second conductive layer 312 in the direction perpendicular to the substrate 10, and the height of the second part 420 in the direction perpendicular to the substrate 10 is the same as the height of the third conductive layer 313 in the direction perpendicular to the substrate 10. Optionally, the height of the first part 410 in the direction perpendicular to the substrate 10 is greater than or equal to and less than or equal to Exemplarily, the height of the first part 410 in the direction perpendicular to the substrate 10 is The height of the second part 420 in the direction perpendicular to the substrate 10 is greater than or equal to and less than or equal to Exemplarily, the height of the second part 420 in the direction perpendicular to the substrate 10 is It should be noted that Figure 1 the thicknesses of the film layers in Figure 1 are not drawn in proportion. In order to highlight the structure of the isolation pillar 40,

[0040] Continue to refer to Figure 1, the orthographic projection of the first part 410 on the substrate 10 is located within the orthographic projection of the second part 420 on the substrate 10. Optionally, the cross-sectional shape of the isolation post 40 in the direction perpendicular to the substrate 10 includes a T shape, that is, the isolation post 40 has an undercut structure. In this way, when part of the film layer of the light-emitting functional layer 320 is vapor-deposited, the second part 420 forms an occlusion effect on the first part 410, so that the vapor-deposited material cannot be vapor-deposited on at least part of the side wall of the first part 410, thus achieving the effect of separating part of the film layer of the light-emitting functional layer 320. Optionally, the cross-sectional shape of the first part 410 in the direction perpendicular to the substrate 10 includes a rectangle or a regular trapezoid. The cross-sectional shape of the second part 420 in the direction perpendicular to the substrate 10 includes a rectangle or a regular trapezoid. The width of the orthographic projection of the isolation post 40 on the substrate 10 is greater than or equal to 5 μm and less than or equal to 10 μm. Exemplarily, the width of the orthographic projection of the isolation post 40 on the substrate 10 is 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm.

[0041] In the embodiment of the present application, the isolation post 40 has an undercut structure, and the isolation post 40 separates at least part of the film layer of the light-emitting functional layer 320. Optionally, the light-emitting functional layer 320 includes a common layer and a light-emitting layer arranged in a stacked manner. The common layer covers the bottom wall 2011 and the side wall 2012 of the pixel opening 201 and extends to at least part of the surface of the pixel definition layer 20 between two adjacent pixel openings 201. The isolation post 40 separates at least the common layer. Optionally, the orthographic projection of the light-emitting layer on the substrate 10 overlaps with the orthographic projection of the common layer (for example, the first transport layer 321 or the second transport layer 323) on the substrate 10. At this time, the isolation post 40 can separate both the light-emitting layer and the common layer. Optionally, 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. Optionally, as Figure 2 shown, the light-emitting functional layer 320 includes a first transport layer 321, a light-emitting layer 322, and a second transport layer 323 arranged in a stacked manner along the direction away from the substrate 10. The first transport layer 321 and the second transport layer 323 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 definition layer 20 between two adjacent pixel openings 201. In Figure 2 , the orthographic projection of the light-emitting layer 322 on the substrate 10 overlaps with the orthographic projection of the common layer (for example, the first transport layer 321 or the second transport layer 323) on the substrate 10, that is, both the light-emitting layer 322 and the common layer are formed by a full-surface vapor deposition process. It should be noted that the light-emitting layer 322 may also not adopt the full-surface vapor deposition process. For example, the light-emitting layer 322 is only vapor-deposited on the bottom wall 2011 of the pixel opening 201, or the light-emitting layer 322 is only vapor-deposited on the bottom wall 2011 and at least part of the side wall 2012 of the pixel opening 201. The present application does not limit this. Since the common layer is formed by the full-surface vapor deposition process, the isolation post 40 still needs to disconnect the common layer.

[0042] In the embodiment of the present application, the first electrode 310 is an anode, the second electrode 330 is a cathode, the first transmission layer 321 includes a hole transmission layer, and the second transmission layer 323 includes an electron transmission layer. It can be understood that the common layer may further include other film layers, for example, an injection layer. Exemplarily, the common layer further includes a first injection layer and a second injection layer. The first injection layer is located between the first electrode 310 and the first transmission layer 321, and the second injection layer is located between the second electrode 330 and the second transmission layer 323. Optionally, the materials of the first transmission layer 321 and the second transmission layer 323 include organic materials. The materials of the first injection layer and the second injection layer include inorganic materials. Since the first transmission layer 321 and the second transmission layer 323 are organic materials, charge lateral transmission is likely to occur, resulting in electrical crosstalk. In the embodiment of the present application, the isolation pillar 40 at least cuts off the common layer (i.e., the first transmission layer 321 and the second transmission layer 323), which can avoid charge lateral transmission, thereby avoiding the generation of electrical crosstalk and improving the color purity of the display panel.

[0043] In the embodiment of the present application, the orthographic projection of the second electrode 330 on the substrate 10 covers the orthographic projection of the pixel opening 201 on the substrate 10 and at least part of the orthographic projection of the pixel definition layer 20 between two adjacent pixel openings 201 on the substrate 10. Optionally, the second electrode 330 is formed by a full-surface evaporation process. As Figure 1 and Figure 2 shown, the isolation pillar 40 cuts off the second electrode 330. Since the material of the isolation pillar 40 includes a conductive material, the second electrode 330 is electrically connected to the isolation pillar 40. For example, the second electrode 330 is at least electrically connected to the first part 410. In this way, the second electrode 330 can be conductively connected across the whole surface, without affecting the resistance of the second electrode 330 and the voltage drop of the display panel, and ensuring the brightness uniformity of the display panel. It should be noted that since the height of the isolation pillar 40 in the direction perpendicular to the substrate 10 is relatively low, in some cases, the second electrode 330 may not be cut off by the isolation pillar 40. Specifically, as Figure 3 shown, the second electrode 330 is not cut off by the isolation pillar 40, and the second electrode 330 can be provided as a whole layer to ensure the brightness uniformity of the display panel.

[0044] In the embodiment of the present application, the orthographic projection of the isolation pillar 40 on the substrate 10 continuously surrounds the orthographic projection of the pixel opening 201 on the substrate 10. For example, as Figure 4a shown. In Figure 4aAmong them, the shape of the orthographic projection of the pixel opening 201 on the substrate 10 is annular. It can be understood that the orthographic projection of the pixel opening 201 on the substrate 10 can also be other shapes, such as rectangle, rhombus, ellipse, triangle, etc. Since the orthographic projection of the isolation column 40 on the substrate 10 surrounds the orthographic projection of the pixel opening 201 on the substrate 10. Optionally, the shape of the orthographic projection of the isolation column 40 on the substrate 10 is the same as the shape of the orthographic projection of the pixel opening 201 on the substrate 10, for example, annular. In some embodiments, for any pixel opening 201, the display panel includes at least two spaced-apart isolation columns 40. As Figure 4b and Figure 5 shown, the at least two isolation columns 40 include a first isolation column 41 and a second isolation column 42, and the orthographic projection of the second isolation column 42 on the substrate 10 continuously surrounds the orthographic projection of the first isolation column 41 on the substrate 10. The light-emitting functional layer 320 (for example, a common layer, and / or a light-emitting layer 322) is blocked by the first isolation column 41 and / or the second isolation column 42. In the embodiments of the present application, by providing at least two isolation columns 40, it can be ensured that the common layer is blocked, further improving the blocking effect, avoiding lateral charge transfer, avoiding electrical crosstalk, and providing color purity. Optionally, the distance between the orthographic projection of the first isolation column 41 on the substrate 10 and the orthographic projection of the second isolation column 42 on the substrate 10 is greater than or equal to 5 μm and less than or equal to 10 μm. Exemplarily, the distance between the orthographic projection of the first isolation column 41 on the substrate 10 and the orthographic projection of the second isolation column 42 on the substrate 10 is 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm. In this way, the second electrode 330 has a sufficient deposition amount at the gap between the first isolation column 41 and the second isolation column 42, so that the second electrode 330 between the first isolation column 41 and the second isolation column 42 has a sufficient contact area with the isolation column 40 (for example, the first isolation column 41 and the second isolation column 42), ensuring that the second electrode 330 is conductively connected across the entire surface.

[0045] Continuing to refer to Figure 1 , the display panel further includes a first encapsulation layer 50, and the first encapsulation layer 50 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 sub-encapsulation layer 510, a second sub-encapsulation layer 520, and a third sub-encapsulation layer 530 that are sequentially stacked in a direction away from the substrate 10. Optionally, the materials of the first sub-encapsulation layer 510 and the third sub-encapsulation layer 530 include inorganic materials. The material of the second sub-encapsulation layer 520 includes an organic material.

[0046] Figure 6 is a schematic cross-sectional structure diagram of a display panel provided by another embodiment of the present application. Figure 6 The shown display panel and Figure 1The difference of the display panel shown is that the display panel further includes a color conversion layer 60, and the color conversion layer is located on the side of the first encapsulation layer 50 away from the substrate 10. In the embodiment of the present application, a plurality of light-emitting units 31 emit light of a single color. For example, blue light or white light. In the embodiment of the present application, taking the light-emitting unit 31 emitting blue light as an example for illustration, 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 at least partially overlaps with the orthographic projection of the light-emitting unit 31 on the substrate 10. The color conversion unit 610 corresponds to the light-emitting unit 31, and the light-emitting unit 31 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. When the light emitted by the light-emitting unit 31 irradiates the red color conversion unit 611, the red color conversion unit 611 is excited to emit red light. When the light emitted by the light-emitting unit 31 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 herein.

[0047] 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 31 on the substrate 10. The light-transmitting unit 630 corresponds to the light-emitting unit 31, and the light-transmitting unit 630 is used to transmit the light emitted by the corresponding light-emitting unit 31. In the embodiment of the present application, the light-transmitting unit 630 includes a transparent material, such as an organic glue, etc. In other embodiments, the color conversion layer 60 does not include the light-transmitting unit 630, and the color conversion unit 610 includes a blue color conversion unit. When the light emitted by the light-emitting unit 31 irradiates the blue color conversion unit, the blue color conversion unit is excited to emit blue light.

[0048] Optionally, the color conversion layer 60 further includes a first barrier structure 620. The first barrier 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 an organic glue.

[0049] Continue to refer to Figure 6, the display panel further includes a filter layer 70, and the filter layer 70 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 31 on the substrate 10. The color of the filter unit 710 corresponding to the same light-emitting unit 31 is the same as the color of the light emitted by the color conversion unit 610 or the color of the light transmitted through 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 barrier structures 720, and the second barrier structures 720 are located between adjacent filter units 710. In the embodiment of the present application, the material of the second barrier structure 720 includes a black material, for example, a black organic material or a black metal material.

[0050] In the embodiment of the present application, the display panel further includes a transflective film layer 810, and the transflective film layer 810 is located on the side of the filter layer 70 away from the substrate 10. The transflective film layer 810 is used to semi-transmit and semi-reflect the light irradiated thereon. In particular, the light at a large angle will be reflected back, thereby playing a role in converging the light. In some cases, the reflected light can re-enter the color conversion unit 610 to convert the un-converted blue light into light of a corresponding color, thereby improving the color purity.

[0051] In the embodiment of the present application, the display panel further includes a second encapsulation layer 820, and the second encapsulation layer 820 is located between the first encapsulation layer 50 and the color conversion layer 60. The second encapsulation layer 820 is used to encapsulate the color conversion layer 60. Optionally, the display panel further includes an adhesive layer 830, and the adhesive layer 830 is located between the first encapsulation layer 50 and the second encapsulation layer 820 and is used to bond the first encapsulation layer 50 and the second encapsulation layer 820. 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 31 will be damaged. Therefore, the color conversion layer 60 is prepared separately and then bonded to the side of the first encapsulation layer 50 away from the substrate 10.

[0052] As Figure 6 shown, since there are other film layers between the OLED and the QD device, that is, there is a certain distance between the two. When the OLED emits light, the light at a large angle will irradiate the QD of the adjacent pixel, resulting in the QD of the adjacent pixel emitting light or emitting stronger light, causing optical crosstalk, and further causing uneven chromaticity of the screen body. The spacer column 40 in the embodiment of the present application can also reflect light, reduce or avoid optical crosstalk, thereby improving the light-emitting efficiency. Specifically, continue to refer to Figure 1, the side of the isolation column 40 close to the pixel opening 201 is used to reflect the light emitted from the light emitting unit 31 to the isolation column 40. Since the material of the first part 410 includes a metal material and the material of the second part 420 includes a transparent conductive material, the first part 410 has a good reflection effect. For example, the side of the first part 410 close to the pixel opening 201 is used to reflect the light emitted from the light emitting unit 31 to the first part 410. It can be understood that most of the light irradiated to the second part 420 is transmitted, and a small amount of light can also be reflected. In the embodiment of the present application, the isolation column 40 can reflect the large-angle light emitted by the light emitting unit 31 back to prevent it from irradiating the upper part of the adjacent light emitting unit 31 and causing optical crosstalk; in addition, the isolation column 40 can change the emission path of the large-angle light, so that the reflected light is emitted from the upper part of the light emitting unit 31 (i.e., emitted at a positive angle), which can achieve the effect of converging light, and the light emitted at a positive angle can excite the color conversion efficiency of the color conversion layer 60 to a greater extent, thereby improving the light extraction efficiency.

[0053] In the embodiment of the present application, in order to ensure that the isolation column 40 can reflect light at a large angle, the isolation column 40 needs to be close to the pixel opening 201. Exemplarily, the distance between the orthographic projection of the isolation column 40 on the substrate 10 and the orthographic projection of the pixel opening 201 on the substrate 10 is greater than or equal to 4 μm and less than or equal to 6 μm. For example, the distance between the orthographic projection of the isolation column 40 on the substrate 10 and the orthographic projection of the pixel opening 201 on the substrate 10 is 4 μm, 4.5 μm, 5 μm, 5.5 μm, and 6 μm.

[0054] In the embodiment of the present application, since the isolation column 40 is at a low height perpendicular to the substrate 10, it can only reflect part of the large-angle light, and part of the large-angle light will still irradiate above the adjacent light-emitting unit 31. For this reason, the isolation column 40 can also be raised in the embodiment of the present application. 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 display panel also includes a support column 90, and the support column 90 is located between the pixel definition layer 20 and the isolation column 40. The orthographic projection of the support column 90 on the substrate 10 is located within the orthographic projection of the pixel definition layer 20 on the substrate 10. The orthographic projection of the isolation column 40 on the substrate 10 is located within the orthographic projection of the support column 90 on the substrate 10. By providing the support column 90, the isolation column 40 can be raised so that large-angle light is reflected by the isolation column 40. Among them, the support column 90 can support the mask plate, and is not an additional structure. That is, the embodiment of the present application can directly use the existing support column 90 on the display panel to raise the isolation column 40. In this way, the preparation process will not be increased and the number of mask plates is reduced.

[0055] In the embodiments of the present application, the material of the support pillar 90 includes an organic material or an inorganic material, and a suitable material for the support pillar 90 can be selected according to actual requirements. In order to achieve the effect of raising the isolation pillar 40, the material of the support pillar 90 is preferably an organic material. Optionally, the material of the support pillar 90 includes an organic material with a reflectivity greater than or equal to 80%. At this time, the side surface of the support pillar 90 close to the pixel opening 201 is used to reflect the light emitted by the light-emitting unit 31 to the support pillar 90. In this way, the light extraction efficiency can be further improved.

[0056] In the embodiments of the present application, the light-emitting functional layer may include a single light-emitting functional layer or multiple light-emitting functional sub-layers, all of which are adapted to the technical solutions of the present application. Among them, each functional sub-layer includes a first transport layer, a light-emitting layer, and a second transport layer. Specifically, as Figure 8 shown.

[0057] Figure 8 is a schematic structural diagram of the light-emitting functional layer provided by an embodiment of the present application. As Figure 8 shown, the light-emitting functional layer includes multiple stacked light-emitting functional sub-layers 3210 and charge generation layers 324 disposed between adjacent light-emitting functional sub-layers 3210. Among them, the charge generation layer 324 includes an anode charge generation layer or a cathode charge generation layer. Each light-emitting functional sub-layer 3210 includes a first transport layer 321, a light-emitting layer 322, and a second transport layer 323. As Figure 8 shown, the light-emitting functional layer includes a first transport layer 321, a first transport layer 321, a first transport layer 321, a light-emitting layer 322, a second transport layer 323, a charge generation layer 324, a light-emitting layer 322, a second transport layer 323, a charge generation layer 324, a light-emitting layer 322, and a second transport layer 323 that are sequentially stacked. In other embodiments, the light-emitting functional layer may also include other numbers of light-emitting functional sub-layers, which are not limited in the embodiments of the present application.

[0058] The embodiments of the present application also provide a method for manufacturing a display panel, the manufacturing method including: preparing a plurality of first conductive layers disposed at intervals on a substrate; preparing a pixel definition layer on a side of the plurality of first conductive layers facing away from the substrate, the pixel definition layer enclosing a plurality of pixel openings, and at least part of the first conductive layer is exposed in the pixel openings; sequentially preparing a second conductive material layer and a third conductive material layer on a side of the pixel definition layer facing away from the substrate, and performing a first patterning process on the second conductive material layer and the third conductive material layer to obtain a second conductive layer and a third conductive layer located in the pixel openings, and a first part and a second part located on a side of the pixel definition layer facing away from the substrate, the first part and the second part are sequentially stacked along a direction away from the substrate, the first conductive layer, the second conductive layer, and the third conductive layer form a first electrode, and the first part and the second part form an isolation pillar; at least preparing a light-emitting functional layer and a second electrode in the pixel openings, and the first electrode, the light-emitting functional layer, and the second electrode form a light-emitting unit.

[0059] Figure 9 It is a schematic flow chart of a method for manufacturing a display panel provided by an embodiment of the present application. Figures 10a to 10d It is a schematic structural diagram of the manufacturing process of a display panel provided by an embodiment of the present application. Specifically, taking the manufacturing of Figure 1 the shown display panel as an example for illustration. As Figure 9 shown, the method includes the following steps.

[0060] Step S110, preparing a plurality of first conductive layers arranged at intervals on a substrate.

[0061] Optionally, preparing a first conductive material layer on the substrate, and performing a second patterning process on the first conductive material layer to obtain a plurality of first conductive layers. As Figure 10a shown, the plurality of first conductive layers 311 are arranged at intervals. The material of the first conductive layer 311 includes a transparent conductive material, for example, ITO. Optionally, the second patterning process includes dry etching and wet etching.

[0062] Step S120, preparing a pixel definition layer on a side of the plurality of first conductive layers facing away from the substrate.

[0063] Optionally, preparing a pixel definition material layer on a side of the plurality of first conductive layers facing away from the substrate, and performing a patterning process on the pixel definition material layer to obtain a pixel definition layer. As Figure 10b shown, the pixel definition layer 20 encloses a plurality of pixel openings 201, and at least a part of the first conductive layer 311 is exposed in the pixel openings 201.

[0064] Step S130, sequentially preparing a second conductive material layer and a third conductive material layer on a side of the pixel definition layer facing away from the substrate, and performing a first patterning process on the second conductive material layer and the third conductive material layer to obtain a second conductive layer and a third conductive layer located in the pixel openings, and a first part and a second part located on a side of the pixel definition layer facing away from the substrate.

[0065] Optionally, the first patterning process includes wet etching. In an embodiment of the present application, as Figure 10c shown, the first conductive layer 311, the second conductive layer 312, and the third conductive layer 313 form a first electrode 310, and the first part 410 and the second part 420 are sequentially stacked along a direction away from the substrate 10. The first part 410 and the second part 420 form a spacer column 40. In an embodiment of the present application, the spacer column 40 is prepared synchronously with a part of the film layer of the first electrode 310. Only the preparation sequence of the first electrode 310 is adjusted, the preparation process is simplified without adding preparation steps, and the number of mask plates is not increased, thus saving costs.

[0066] Optionally, before preparing the second conductive material layer and the third conductive material layer, the preparation method further includes: preparing support pillars on the side of the pixel definition layer facing away from the substrate, the orthographic projection of the support pillars on the substrate is located within the orthographic projection of the pixel definition layer on the substrate, and the orthographic projection of the isolation pillars on the substrate is located within the orthographic projection of the support pillars on the substrate. The support pillars can raise the isolation pillars, so that the isolation pillars can effectively reflect large-angle light, avoid irradiating above adjacent light-emitting units, and cause optical crosstalk; in addition, the isolation pillars can change the outgoing path of the large-angle light, so that the reflected light exits from above the light-emitting unit (i.e., positive viewing angle exit), which can achieve the effect of converging light, and the light exiting at the positive viewing angle can more effectively stimulate the color conversion efficiency of the color conversion layer and improve the light extraction efficiency. In the embodiments of the present application, the support pillars can be made of an organic material with a reflectivity greater than 85%. In this way, the support pillars can also reflect the light irradiated on their surfaces, further improving the light extraction efficiency.

[0067] Step S140, prepare a light-emitting functional layer and a second electrode at least within the pixel opening.

[0068] Optionally, a light-emitting functional layer and a second electrode are sequentially prepared within the pixel opening and at least part of the surface of the pixel definition layer facing away from the substrate. For example, both the light-emitting functional layer and the second electrode are prepared by a full-surface evaporation process, and the isolation pillars at least block at least part of the film layer (such as the common layer) of the light-emitting functional layer. In this way, the lateral transmission of charges can be avoided and electrical crosstalk can be reduced. Optionally, the isolation pillars can also block the second electrode, and the second electrode can be electrically connected to the isolation pillars. In this way, the full-surface conduction of the second electrode can be achieved, and the brightness uniformity of the display panel can be improved. As Figure 10d shown, the first electrode 310, the light-emitting functional layer 320, and the second electrode 330 form a light-emitting unit 31. The isolation pillar 40 blocks the light-emitting functional layer 320 and the second electrode 330.

[0069] Optionally, as Figure 10d shown, after preparing the second electrode, the preparation method further includes: sequentially preparing a first sub-encapsulation layer 510, a second sub-encapsulation layer 520, and a third sub-encapsulation layer 530 on the side of the second electrode facing away from the substrate.

[0070] In the embodiments of the present application, the preparation method further includes preparing a color conversion layer and bonding the color conversion layer to the side of the third sub-encapsulation layer facing away from the substrate to obtain a display panel as Figure 6 shown.

[0071] The embodiments of the present application provide a display device, and the display device includes the display panel in the above embodiments.

[0072] Figure 11 is a schematic structural diagram of a display device provided by an embodiment of the present application. As Figure 11As shown, the display device 1100 is a product with an image display function. For example, the display device 1100 can be used to display static images, such as pictures or photos. The display device 1100 can also be used to display dynamic images, such as videos.

[0073] The display device 1100 can be a laptop computer, mobile phone, handheld or portable computer, camera, video camera, in-vehicle intelligent central control screen, calculator, smart watch, GPS navigator, digital photo frame, electronic billboard or sign, projector, etc.

[0074] The display device 1100 includes the display panel provided in any of the above embodiments.

[0075] In addition, the display device 1100 can also have functions such as taking pictures, recording videos, fingerprint recognition, and face recognition. Correspondingly, the display device 1100 further includes at least one functional module for implementing the above functions, such as an under-screen camera, an under-screen fingerprint recognition sensor, etc.

[0076] The basic principles of the present application have been described in conjunction with specific embodiments. However, it should be noted that the advantages, benefits, effects, etc. mentioned in the present application are only examples and not limitations. It cannot be considered that these advantages, benefits, effects, etc. are essential for each embodiment of the present application. In addition, the specific details disclosed above are only for illustrative purposes and for ease of understanding, rather than limitations. The above details do not limit the present application to necessarily adopt the above specific details for implementation.

[0077] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present application are only illustrative examples and do not intend to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any way. Words such as "including", "comprising", "having", etc. are open-ended terms, meaning "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein refer to the phrase "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with each other.

[0078] It should also be noted that in the devices, equipment, and methods of the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application.

[0079] The foregoing description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Accordingly, the present application is not intended to be limited to the aspects shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0080] The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the present application to the form disclosed herein. Although several example aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, alterations, additions, and subcombinations thereof.

[0081] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A display panel, characterized in that: include: substrate; A pixel definition layer, located on one side of the substrate, the pixel definition layer encloses 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 located within the pixel openings, the light-emitting units comprising a first electrode, a light-emitting functional layer, and a second electrode sequentially stacked in a direction away from the substrate; An isolation column is located on the side of the pixel definition layer away from the substrate, the orthographic projection of the isolation column on the substrate surrounds the orthographic projection of the pixel opening on the substrate, and the material of at least part of the film layer of the isolation column is the same as the material of at least part of the film layer of the first electrode.

2. The display panel according to claim 1, characterized in that: At least a portion of the film layer of the isolation column is disposed in the same layer as at least a portion of the film layer of the first electrode; Preferably, the isolation column comprises a first portion and a second portion sequentially stacked in a direction away from the substrate, the first electrode comprises a first conductive layer, a second conductive layer and a third conductive layer sequentially stacked in a direction away from the substrate, the material of the first portion is the same as the material of the second conductive layer, and the material of the second portion is the same as the material of the third conductive layer; Preferably, the first conductive layer is located on a side of the pixel definition layer close to the substrate, and is at least partially exposed in the pixel opening; Preferably, the first portion and the second conductive layer are disposed in the same layer and are disconnected, and / or the second portion and the third conductive layer are disposed in the same layer and are disconnected; Preferably, the second conductive layer and the third conductive layer are located within the pixel opening; The second conductive layer at least covers the bottom wall of the pixel opening, and the orthographic projection of the third conductive layer on the substrate covers the orthographic projection of the second conductive layer on the substrate; Preferably, the materials of the first conductive layer and the third conductive layer include transparent conductive materials; the material of the second conductive layer includes metal materials; Preferably, the material of the first conductive layer and the third conductive layer includes indium tin oxide; the material of the second conductive layer includes silver; Preferably, the height of the first portion perpendicular to the substrate is greater than or equal to and less than or equal to And / or, the height of the second portion perpendicular to the substrate is greater than or equal to and less than or equal to 3. The display panel according to claim 1, characterized in that: The isolation column isolates at least part of the film layer of the light-emitting functional layer; Preferably, the light-emitting functional layer comprises a common layer and a light-emitting layer which are stacked, the common 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 definition layer between two adjacent pixel openings, and the isolation column at least isolates 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 isolation column separates the light-emitting layer and the common layer; Preferably, the orthographic projection of the second electrode on the substrate covers the orthographic projection of the pixel opening on the substrate and covers at least part of the orthographic projection of the pixel definition layer between two adjacent pixel openings on the substrate, and the isolation column isolates the second electrode; Preferably, the material of the isolation column includes a conductive material, and the second electrode is electrically connected to the isolation column; Preferably, the isolation column comprises a first portion and a second portion stacked in sequence in a direction away from the substrate, the orthographic projection of the first portion on the substrate is located within the orthographic projection of the second portion on the substrate, and the second electrode is electrically connected to at least the first portion; Preferably, the cross-sectional shape of the isolation column in a direction perpendicular to the substrate includes a T-shape; Preferably, the cross-sectional shape of the first portion in a direction perpendicular to the substrate includes a rectangle or a regular trapezoid; and / or the cross-sectional shape of the second portion in a direction perpendicular to the substrate includes a rectangle or a regular trapezoid; Preferably, the width of the orthographic projection of the isolation column on the substrate is greater than or equal to 5 μm and less than or equal to 10 μm.

4. The display panel according to any one of claims 1 to 3, characterized in that: The orthographic projection of the isolation column 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 comprises at least two spacer columns arranged at intervals, the at least two spacer columns comprise a first spacer column and a second spacer column, and the orthographic projection of the second spacer column on the substrate continuously surrounds the orthographic projection of the first spacer column on the substrate; Preferably, a distance between an orthographic projection of the first spacer column on the substrate and an orthographic projection of the second spacer column on the substrate is greater than or equal to 5 μm and less than or equal to 10 μm.

5. The display panel according to any one of claims 1 to 3, characterized in that: The side of the isolation column close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the isolation column; Preferably, the isolation column comprises a first portion and a second portion stacked in sequence in a direction away from the substrate, and a side surface of the first portion close to the pixel opening is used to reflect light emitted by the light emitting unit to the first portion; Preferably, the material of the first part includes a metal material; and / or the material of the second part includes a transparent conductive material; Preferably, the material of the first part includes silver; and / or the material of the second part includes indium tin oxide; Preferably, the display panel further comprises a support column, wherein the support column is located between the pixel definition layer and the isolation column, and an orthographic projection of the support column on the substrate is located within an orthographic projection of the pixel definition layer on the substrate; The orthographic projection of the isolation column on the substrate is located within the orthographic projection of the support column on the substrate; Preferably, the material of the support column includes organic material or inorganic material; Preferably, the material of the support column includes an organic material with a reflectivity greater than or equal to 80%, and the side of the support column close to the pixel opening is used to reflect the light emitted by the light-emitting unit to the support column; Preferably, a distance between an orthographic projection of the isolation column on the substrate and an orthographic projection of the pixel opening on the substrate is greater than or equal to 4 μm and less than or equal to 6 μm.

6. The display panel according to claim 1, characterized in that: 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 sidewalls and bottom wall of the pixel opening and extends to at least a portion of the surface of the pixel definition 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 an anode charge generation layer or a cathode charge generation layer.

7. The display panel according to claim 1, characterized in that: The plurality of light-emitting units emit light of a single color, 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 color conversion layer corresponds to the light-emitting unit, 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, 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 sub-encapsulation layer, a second sub-encapsulation layer and a third sub-encapsulation layer which are sequentially stacked in a direction away from the substrate; Preferably, the material of the first sub-encapsulation layer and the third sub-encapsulation layer comprises an inorganic material; and / or the material of the second sub-encapsulation layer comprises an organic material; 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.

8. A method for preparing a display panel, characterized in that: include: Preparing a plurality of first conductive layers spaced apart from each other on a substrate; A pixel definition layer is formed on a side of the plurality of first conductive layers facing away from the substrate, wherein the pixel definition layer encloses a plurality of pixel openings, and the pixel openings expose at least a portion of the first conductive layers; A second conductive material layer and a third conductive material layer are sequentially prepared on a side of the pixel definition layer away from the substrate, and the second conductive material layer and the third conductive material layer are subjected to a first patterning process to obtain a second conductive layer and a third conductive layer located in the pixel opening, and a first portion and a second portion located on a side of the pixel definition layer away from the substrate, wherein the first portion and the second portion are sequentially stacked in a direction away from the substrate, the first conductive layer, the second conductive layer and the third conductive layer constitute a first electrode, and the first portion and the second portion constitute an isolation column; A light-emitting functional layer and a second electrode are prepared at least in the pixel opening, and the first electrode, the light-emitting functional layer and the second electrode constitute a light-emitting unit.

9. The method for preparing a display panel according to claim 8, characterized in that: The first patterning process includes wet etching; Preferably, the step of preparing the light-emitting functional layer and the second electrode at least in the pixel opening comprises: sequentially preparing the light-emitting functional layer and the second electrode in the pixel opening and on at least a portion of the surface of the pixel definition layer away from the substrate, wherein the isolation column isolates at least a portion of the film layer of the light-emitting functional layer; Preferably, the isolation column isolates the second electrode, and the second electrode is electrically connected to the isolation column; Preferably, before the step of sequentially preparing the second conductive material layer and the third conductive material layer on the side of the pixel definition layer away from the substrate, the preparation method further comprises: preparing a support column on the side of the pixel definition layer away from the substrate, the orthographic projection of the support column on the substrate being located within the orthographic projection of the pixel definition layer on the substrate, and the orthographic projection of the isolation column on the substrate being located within the orthographic projection of the support column on the substrate; Preferably, in the step of preparing a plurality of first conductive layers spaced apart on the substrate, the preparation method comprises: preparing a first conductive material layer on the substrate, and performing a second patterning process on the first conductive material layer to obtain the plurality of first conductive layers; Preferably, after preparing the second electrode, the preparation method further comprises: sequentially preparing a first sub-encapsulation layer, a second sub-encapsulation layer and a third sub-encapsulation layer on a side of the second electrode facing away from the substrate.

10. A display device, characterized in that: A display panel comprising any one of claims 1 to 7; or a display panel prepared by the method for preparing a display panel according to claim 8 or 9.

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