Display panel and display device

Abstract

The invention provides a display panel and a display device. The display panel and the display device solve the problem that a top-emitting WOLED display screen is low in light emitting efficiency in the prior art. The display panel includes: a substrate; the isolation structure is stacked on the surface of one side of the substrate, and an isolation opening is defined by the isolation structure; and a white light emitting device located in the isolation opening.

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 bottom emission technology, white organic light-emitting diode (WOLED) display technology has the advantages of lower operating voltage and longer service life at the same brightness.

[0003] However, the display effect of the WOLED display screen in the related art needs to be improved. Summary of the invention

[0004] In view of this, embodiments of the present application provide a display panel and a display device to solve the problem of low light extraction efficiency of top-emitting WOLED display screens in the related art.

[0005] In a first aspect, the present application provides a display panel, comprising: a substrate; an isolation structure stacked on a side surface of the substrate, the isolation structure enclosing an isolation opening; and a white light emitting device located in the isolation opening.

[0006] In one embodiment, the display panel also includes a light conversion layer, which is stacked on the side of the white light emitting device away from the substrate, and the light conversion layer is located in the isolation opening; preferably, the light conversion layer includes at least one of a color filter, an organic light-emitting material, a fluorescent light-emitting material or an inorganic light-emitting material; preferably, the distance from the surface of the light conversion layer away from the substrate to the substrate is less than the distance from the surface of the isolation structure away from the substrate to the substrate.

[0007] In one embodiment, the display panel also includes a first encapsulation layer stacked between the white light emitting device and the light conversion layer; preferably, the first encapsulation layer includes an inorganic material; preferably, the display panel also includes a second encapsulation layer stacked on the side of the light conversion layer away from the first inorganic encapsulation layer, and the orthographic projection of the second encapsulation layer on the substrate covers the orthographic projection of the first inorganic encapsulation layer on the substrate; preferably, the distance from the surface of the second encapsulation layer away from the substrate to the substrate is greater than the distance from the surface of the isolation structure away from the substrate to the substrate; further preferably, the second encapsulation layer includes an organic material; preferably, the display panel also includes a third encapsulation layer stacked on the side of the second encapsulation layer away from the substrate, and the orthographic projection of the third encapsulation layer on the substrate covers the second encapsulation layer; further preferably, the third encapsulation layer includes an inorganic material.

[0008] In one embodiment, a white light emitting device is arranged in each isolation opening; the orthographic projection of the white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate, and the white light emitting devices in the multiple isolation openings are linearly arranged on a plane parallel to the substrate; or the multiple white light emitting devices include a first white light emitting device and a plurality of second white light emitting devices, the orthographic projection of the first white light emitting device on the substrate does not overlap with the orthographic projection of the light conversion layer on the substrate, and the orthographic projection of the second white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate; preferably, the first white light emitting device and the plurality of second white light emitting devices are arranged in an array; preferably, the plurality of second white light emitting devices are arranged around the first white light emitting device; preferably, the light conversion layer includes a plurality of light conversion parts of different colors, and the light conversion parts are located in the isolation openings; further preferably, the plurality of light conversion parts include a red light conversion part, a green light conversion part and a blue light conversion part.

[0009] In one embodiment, a plurality of white light emitting devices are arranged in an isolation opening, and the display panel further comprises a pixel definition layer arranged on the substrate, the pixel definition layer having a plurality of pixel openings, the orthographic projections of the plurality of pixel openings on the substrate being located within the orthographic projection of a corresponding isolation opening on the substrate, and a white light emitting device being arranged in each pixel opening; preferably, the sidewalls of the pixel definition layer between at least some adjacent white light emitting devices in the same isolation opening are concave; preferably, the pixel opening comprises a top end away from the substrate and a bottom end close to the substrate, and the orthographic projection range of the bottom end on the substrate partially overlaps with the orthographic projection range of the top end on the substrate; preferably, the orthographic projection of the top end on the substrate is closer to the isolation structure than the orthographic projection of the bottom end on the substrate.

[0010] In one embodiment, the orthographic projection of the white light emitting device in the isolation opening on the substrate is located within the orthographic projection of the light conversion layer on the substrate, and the multiple white light emitting devices in the isolation opening are linearly arranged on a plane parallel to the substrate; or, the multiple white light emitting devices include a first white light emitting device and a plurality of second white light emitting devices, the orthographic projection of the first white light emitting device on the substrate does not overlap with the orthographic projection of the light conversion layer on the substrate, and the orthographic projection of the second white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate; preferably, the first white light emitting device and the plurality of second white light emitting devices are arranged in an array; preferably, the plurality of second white light emitting devices are arranged around the first white light emitting device; preferably, the light conversion layer includes a plurality of light conversion portions of different colors, each light conversion portion covering a white light emitting device; further preferably, the plurality of light conversion portions include a red light conversion portion, a green light conversion portion and a blue light conversion portion.

[0011] In one embodiment, the display panel further includes a light-transmitting portion stacked on a side of the first white light emitting device away from the substrate, and the light-transmitting portion is located in the isolation opening.

[0012] In one embodiment, the isolation structure includes a first substructure and a second substructure that are stacked, the first substructure is located on a side of the second substructure close to a substrate, and the orthographic projection of the first substructure on the substrate is located within the range of the orthographic projection of the second substructure on the substrate; preferably, the isolation structure also includes a third substructure, stacked on a side of the first substructure away from the second substructure, and the orthographic projection of the first substructure on the substrate is located within the range of the orthographic projection of the third substructure on the substrate; preferably, the first substructure includes a conductive material, the white light emitting device includes a first electrode, and the first electrode is electrically connected to the first substructure.

[0013] In one embodiment, the white light emitting device includes a first electrode, the first electrode is electrically connected to the isolation structure, and the thickness of the first electrode is greater than or equal to 50 angstroms and less than or equal to 300 angstroms.

[0014] A second aspect of the present application provides a display device, comprising the display panel provided in the first aspect.

[0015] The display panel and display device provided in the embodiments of the present application are configured with an isolation structure, and a white light emitting device is prepared in an isolation opening formed by the isolation structure. Each film layer of the white light emitting device is located in the isolation opening, that is, each film layer of different white light emitting devices is disconnected from each other, thereby improving the color purity of the white light emitting device and further improving the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a cross-sectional schematic diagram of a display panel in the related art.

[0017] Figure 2a A schematic cross-sectional view of a display panel provided in the first embodiment of the present application.

[0018] Figure 2b A schematic cross-sectional view of a display panel provided in accordance with the second embodiment of the present application.

[0019] Figure 3 A partial top view of a display panel provided in the third embodiment of the present application.

[0020] Figure 4a A partial top view of a display panel provided in the fourth embodiment of the present application.

[0021] Figure 4b A partial top view of a display panel provided in the fifth embodiment of the present application.

[0022] Figure 4c A schematic diagram of the cross-sectional structure of a display panel provided in the sixth embodiment of the present application.

[0023] Figure 5aA partial top view of a display panel provided in the seventh embodiment of the present application.

[0024] Figure 5b A partial top view of the display panel provided in the eighth embodiment of the present application.

[0025] Figure 5c A partial top view of a display panel provided in the ninth embodiment of the present application.

[0026] Figure 6a A schematic cross-sectional view of a display panel provided in the tenth embodiment of the present application.

[0027] Figure 6b A schematic cross-sectional view of a display panel provided in the eleventh embodiment of the present application.

[0028] Figure 7 A cross-sectional schematic diagram of the isolation structure provided in the twelfth embodiment of the present application. DETAILED DESCRIPTION

[0029] Figure 1 FIG. 1 is a cross-sectional view of a display panel in the related art. Figure 1 As shown, the display panel includes a substrate 110, a plurality of white light emitting devices 120 arranged at intervals on the substrate 110, an encapsulation layer 130 covering the plurality of white light emitting devices 120, and a color filter layer 140 covering the encapsulation layer 130. Among them, the white light emitting device 120 includes an anode layer, an organic light emitting layer and a cathode layer arranged in a stacked manner. The plurality of white light emitting devices 120 share part of the film layer, and the shared film layer is formed on the entire surface so as to be shared by the plurality of white light emitting devices. The shared film layer includes a cathode layer. The white light emitted by the organic light emitting layer is emitted through the cathode layer, the encapsulation layer 130 and the color filter layer 140, and is filtered by the color filter layer 140 to obtain a color light of a specific color. At the same time, the color filter layer 140 includes a plurality of filters 141 arranged in alignment with the plurality of white light emitting devices 120, and a black shading (Black Matrix, BM) layer 142 coated between the plurality of filters 141. The overall light output efficiency of the display panel is affected by factors such as film thickness, complex film structure, and material transmittance.

[0030] In view of this, an embodiment of the present application provides a display panel, including a substrate; an isolation structure, which is stacked on a side surface of the substrate, and the isolation structure encloses an isolation opening; and a white light emitting device, which is located in the isolation opening. According to the display panel provided by the embodiment of the present application, by arranging the white light emitting device in the isolation opening enclosed by the isolation structure, that is, the film layers of adjacent white light emitting devices are disconnected from each other, the color purity of the white light emitting device is improved, thereby improving the display effect of the display panel.

[0031] 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.

[0032] Figure 2a Schematic diagram of a cross section of a display panel provided in the first embodiment of the present application. Figure 2a As shown, the display panel includes a substrate 210; an isolation structure 220 stacked on one side surface of the substrate 210, the isolation structure 220 encloses an isolation opening 2201; a white light emitting device 230 is arranged in the isolation opening 2201, and one side surface of the white light emitting device 230 is in contact with one side surface of the substrate 210.

[0033] The substrate 210 may be an array substrate.

[0034] The white light emitting device 230 includes a first electrode 231, an organic light emitting layer 232, and a second electrode 233 stacked in sequence. The first electrode 231 is located on the side of the organic light emitting layer 232 away from the substrate 210, and the second electrode 233 is located on the side of the organic light emitting layer 232 close to the substrate 210. Among them, the first electrode 231 can be an anode layer, and correspondingly, the second electrode 233 is a cathode layer. Conversely, the first electrode 231 can also be a cathode layer, and correspondingly, the second electrode 233 is an anode layer. The organic light emitting layer 232 can be a separate white light emitting layer or a laminated structure. In the case where the organic light emitting layer 232 is a laminated structure, the organic light emitting layer 232 may include a hole injection layer, a hole transport layer, a resistance blocking layer, a white light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer stacked in sequence. It should be noted that in actual products, the organic light emitting layer 232 can reasonably select a part of the above-mentioned multiple film layers.

[0035] At least part of the isolation structure 220 is made of metal. For example, the isolation structure 220 includes a plurality of stacked film layers, at least part of which are made of metal. The isolation structure 220 is in contact with the first electrode 231 of the white light emitting device 230 and is insulated from the second electrode layer 233 to achieve an electrical connection between the isolation structure 220 and the white light emitting device 230. In this case, by using the isolation structure 220 to electrically connect at least part of the first electrodes 231 of the white light emitting devices, the in-plane resistance of the white light emitting device 230 can be greatly reduced compared to the shared first electrode 231. At the same time, by arranging the white light emitting device 230 in the isolation opening 2201, that is, the film layers of adjacent white light emitting devices 230 are independent of each other, so that the current crosstalk problem can be avoided.

[0036] In one embodiment, the array substrate may further include a pixel definition layer, which is disposed on a side of the isolation structure 220 close to the substrate 210. The pixel definition layer defines a pixel opening, and the white light emitting device 230 is disposed in the pixel opening. The pixel definition layer isolates the second electrode 232 from the isolation structure 220 to avoid a short circuit between the second electrode 232 and the isolation structure 220. In other embodiments of the present application, the isolation structure 220 and the pixel definition layer are both disposed on one side of the substrate, and the pixel definition layer is disposed between the isolation structure 220 and the white light emitting device 230.

[0037] Through the above settings, when preparing the white light emitting device 230 in the isolation structure 220 of the embodiment of the present application, each film layer of the white light emitting device 230 is located in the isolation opening, that is, the film layers of adjacent white light emitting devices 230 are disconnected from each other, thereby improving the color purity of the white light emitting device and avoiding the crosstalk problem between adjacent white light emitting devices 230, thereby improving the display effect of the display panel.

[0038] Figure 2b FIG. 1 is a schematic cross-sectional view of a display panel provided in the second embodiment of the present application. Figure 2b As shown, the display panel further includes a light conversion layer 240 , which is stacked on a side of the white light emitting device 230 away from the substrate 210 and is also located in an isolation opening 2201 enclosed by the isolation structure 220 .

[0039] The light conversion layer 240 may be a light color conversion layer. In this case, the light conversion layer 240 may be at least one of a color filter, an organic light emitting material, a fluorescent light emitting material, or an inorganic light emitting material. Taking a color filter, i.e., a color filter layer, as an example, the color filter layer may filter the white light emitted by the white light emitting device 230 to obtain a color light of a specific color, so as to realize the color display of the display panel of the embodiment of the present application.

[0040] In one embodiment, the distance between the surface of the light conversion layer 240 away from the substrate 210 and the substrate 210 is smaller than the distance between the surface of the isolation structure 220 away from the substrate 210 and the substrate 210. In this case, since the light conversion layer 240 is disposed in the isolation opening 2201, it is blocked by the isolation structure 220. Therefore, compared with the related art, in the embodiment of the present application, there is no need to set additional barriers around the light conversion layer 240, so as to ensure that the light conversion effect of the light conversion layer 240 only acts on the white light emitted by the white light emitting device 230 in the same isolation opening, so as to improve the purity of the light emitted from each isolation opening, thereby improving the display effect of the display panel.

[0041] In one embodiment, the display panel further includes a first encapsulation layer 251 located in the isolation opening 2201. The first encapsulation layer 251 is stacked between the white light emitting device 230 and the light conversion layer 240. The first encapsulation layer 251 can block water vapor, oxygen, etc. from invading the white light emitting device 230 to increase the service life of the display panel.

[0042] In one embodiment, the display panel further includes a second encapsulation layer 252. The second encapsulation layer 252 is stacked on a side of the light conversion layer 240 away from the first encapsulation layer 251. At this time, the first encapsulation layer 251, the light conversion layer 240 and the second encapsulation layer 252 are stacked, one side surface of the light conversion layer 240 is in contact with the first encapsulation layer 251, and the other side surface of the light conversion layer 240 is in contact with the second encapsulation layer 252. In addition, the orthographic projection of the second encapsulation layer 252 on the substrate 210 covers the orthographic projection of the first encapsulation layer 251 on the substrate 210, so that the second encapsulation layer 252 and the first encapsulation layer 251 together form a packaging structure that wraps the light conversion layer 240 and covers the white light emitting device 230, so as to further block the invasion of water vapor, oxygen, etc., thereby improving the service life of the display panel.

[0043] In one embodiment, the distance between the surface of the second encapsulation layer 251 away from the substrate 210 and the substrate 210 is greater than the distance between the surface of the isolation structure 220 away from the substrate 210 and the substrate 210. In this way, the second encapsulation layer 251 can fill the isolation opening 2201 to improve the encapsulation effect. The second encapsulation layer 252 covers one side surface of the light conversion layer 240, and at the same time covers part of the sidewall of the isolation structure 220 and the surface away from the substrate 210. At this time, the second encapsulation layer 252 can form a flat surface on the side away from the substrate 210.

[0044] In one embodiment, the display panel further includes a third encapsulation layer 253. The third encapsulation layer 253 is stacked on a side of the second encapsulation layer 252 away from the substrate 210. Moreover, the orthographic projection of the third encapsulation layer 253 on the substrate 210 covers the second encapsulation layer 252. At this time, the first encapsulation layer 251, the second encapsulation layer 252 and the third encapsulation layer 253 work together to protect the structure in the isolation opening 2201, so as to improve the service life of the display panel.

[0045] Exemplarily, the first encapsulation layer 251 includes an inorganic material, the second encapsulation layer 252 includes an organic material, and the third encapsulation layer 253 includes an inorganic material, and the three together form an inorganic / organic / inorganic three-layer encapsulation structure. This structure has a very high barrier effect on gases such as water vapor and oxygen, so it can effectively protect the white light emitting device 230 and the light conversion layer 240 covered by it, further improving the service life of the display panel.

[0046] Figure 3This is a partial top view of a display panel provided in the third embodiment of the present application. Figure 3 As shown, the isolation structure 220 is in a grid shape, and a plurality of isolation openings 2201 are formed by the isolation structure 220. A white light emitting device is disposed in each isolation opening 2201 (because it is blocked by the light conversion layer 240, Figure 3 In the same isolation opening 2201, the orthographic projection of the white light emitting device on the substrate 210 is located within the orthographic projection of the light conversion layer 240 on the substrate 210, that is, the light conversion layer 240 covers the white light emitting device. The white light emitting devices in the plurality of isolation openings 2201 are linearly arranged on a plane parallel to the substrate 240.

[0047] In one embodiment, the light conversion layer 240 includes a plurality of light conversion parts of different colors, and the light conversion parts are located in the isolation opening 2201. The plurality of light conversion parts of different colors can respectively convert white light into colored light of different colors. For example, the plurality of light conversion parts can include a red light conversion part 241, a green light conversion part 242, and a blue light conversion part 243. Among them, the red light conversion part 241 can convert white light into red light; the green light conversion part 242 can convert white light into green light; and the blue light conversion part 243 can convert white light into blue light. It can be understood that the plurality of light conversion parts can be integrated into one light conversion layer 240, or can be respectively arranged in different light conversion layers 240, and the present application does not make specific limitations on this.

[0048] In one embodiment, the light emission colors of the light conversion parts in each isolation opening 2201 can be set so that all isolation openings 2201 can emit predetermined color lights according to a predetermined rule. Exemplarily, the light conversion layer 240 can be set so that each column of isolation openings 2201 emits red, green, and blue lights in sequence to realize R / G / B light emission of the display panel.

[0049] Alternatively, in another embodiment, the plurality of white light emitting devices include a first white light emitting device 2301 and a plurality of second white light emitting devices 2302. The orthographic projection of the first white light emitting device 2301 on the substrate 210 does not overlap with the orthographic projection of the light conversion layer 240 on the substrate, that is, the first white light emitting device 2301 is not covered by the light conversion layer 240. The orthographic projection of the second white light emitting device 2302 on the substrate 210 is located within the orthographic projection of the light conversion layer 240 on the substrate 210, that is, the second white light emitting device 2302 is covered by the light conversion layer 240. At this time, by setting the light conversion layer 240 corresponding to the second white light emitting device 2302, the color or brightness of the light emitted from its isolation opening 2201 can be flexibly adjusted. The second white light emitting device 2302 emits colored light to realize color display of the display panel; at the same time, the first white light emitting device 2301 emits white light, which can greatly improve the extreme brightness of the display panel to improve the display effect of the display panel under strong light.

[0050] Figure 4a This is a partial top view of a display panel provided in the fourth embodiment of the present application. Figure 4a As shown, the first white light emitting device 2301 and the plurality of second white light emitting devices 2302 are arranged in an array. The first white light emitting device 2301 and the plurality of second white light emitting devices 2302 are divided into a plurality of 2×2 white light emitting device groups; each white light emitting device group includes a first white light emitting device 2301 and three second white light emitting devices 2302 adjacent to the first white light emitting device 2301; the white light emitted by the three second white light emitting devices 2302 passes through their respective corresponding light conversion parts (such as Figure 4a The three colors of light are respectively converted into red, green and blue. At this time, each 2×2 white light emitting device group can realize R / G / B / W light output.

[0051] In yet another embodiment, a plurality of second white light emitting devices 2302 are arranged around the first white light emitting device 2301 . Figure 4b A partial top view of a display panel provided in the fifth embodiment of the present application, as shown in FIG. Figure 4b As shown, the first white light emitting device 2301 is circular, and three second white light emitting devices 2302 surround the first white light emitting device 2301. In addition, the white light emitted by the three second white light emitting devices 2302 passes through the corresponding light conversion parts (such as Figure 4b It is understood that the specific shapes of the first white light emitting device 2301 and the plurality of second white light emitting devices 2302, as well as the colors of the light conversion parts corresponding thereto, can be set according to actual conditions, and this application does not make specific restrictions on this.

[0052] Through the above settings, the display panel provided in the embodiment of the present application can flexibly adjust the display pixel shape and its color distribution, and realize R / G / B or R / G / B / W light output, thereby improving the applicability and display effect of the display panel.

[0053] Figure 4c FIG. 6 is a schematic diagram of a cross-sectional structure of a display panel provided in the sixth embodiment of the present application. Figure 4c As shown, the display panel also includes a light-transmitting portion 244, which is stacked on the side of the first white light emitting device 2301 away from the substrate 210. The light-transmitting portion 244 is arranged in the same layer as the light conversion portion, and the light-transmitting portion 244 is also located in the isolation opening 2201. The light-transmitting portion 244 is used to transmit white light without performing light conversion. By providing the light-transmitting portion 244, it is possible to avoid the formation of a height difference on the side of the first white light emitting device 2301 away from the substrate 210 due to the absence of the light conversion portion, ensure flatness, and improve the packaging effect.

[0054] It should be noted that, in this embodiment, the linear arrangement of the first white light emitting device 2301 and the second white light emitting device 2302 is only exemplary. Figure 4a and Figure 4b The arrangement method in , or other conventional arrangement methods can also be used.

[0055] In one embodiment, the array substrate may further include a light extraction layer 270, and the light extraction layer 270 is stacked between the white light emitting device 230 and the light conversion layer 240. Figure 4c As shown, the light extraction layer 270 is specifically located between the first encapsulation layer 251 and the light conversion layer 240. In other embodiments, the light extraction layer 270 may also be located between the white light emitting device 230 and the first encapsulation layer 251. The light efficiency layer can improve the efficiency of the white light emitted by the white light emitting device 230 to the outside of the display panel, thereby improving the light extraction efficiency of the display panel. Exemplarily, the light efficiency layer may be a microlens film layer.

[0056] Figure 5a This is a partial top view of a display panel provided in the seventh embodiment of the present application. Figure 5aAs shown, the display panel includes a plurality of isolation openings 2201 arranged in an array, and each isolation opening 2201 includes a plurality of white light emitting devices 230. The orthographic projection of the white light emitting device 230 on the substrate 210 is located within the orthographic projection of the light conversion layer 240 on the substrate 210, so that the action range of the light conversion layer 240 can cover the white light emitted by the white light emitting device 230. In addition, the plurality of white light emitting devices 230 in each isolation opening 2201 are linearly arranged on a plane parallel to the substrate 210. At this time, the light conversion layer 240 can be set as a plurality of light conversion parts of different colors, each light conversion part covers a white light emitting device, so that light of different colors is emitted from the same isolation opening 2201 at the same time.

[0057] Exemplarily, three white light emitting devices 230 are included in each isolation opening 2201, and the light conversion layer 240 includes a red light conversion portion 241, a green light conversion portion 242, and a blue light conversion portion 243. Moreover, the orthographic projections of the three white light emitting devices 230 on the substrate 210 are respectively located within the orthographic projections of the red light conversion portion 241, the green light conversion portion 242, and the blue light conversion portion 243 on the substrate 210. At this time, R / G / B light can be emitted in each isolation opening 2201.

[0058] Figure 5b This is a partial top view of a display panel provided in the eighth embodiment of the present application. Figure 5b As shown, the plurality of white light emitting devices 230 include a first white light emitting device 2301 and a plurality of second white light emitting devices 2302. The orthographic projection of the first white light emitting device 2301 on the substrate 210 does not overlap with the orthographic projection of the light conversion layer 240 on the substrate 210, and the orthographic projection of the second white light emitting device 2302 on the substrate 210 is located within the orthographic projection of the light conversion layer 240 on the substrate 210. At this time, the action range of the light conversion layer 240 can cover the white light emitted by the second white light emitting device 2302, while not covering the white light emitted by the first white light emitting device 2301. At this time, the light conversion layer 240 can be set so that different colors of light are emitted from the same isolation opening at the same time. The second white light emitting device 2302 emits colored light to realize the color display of the display panel; at the same time, the first white light emitting device 2301 emits white light, which can greatly improve the extreme brightness of the display panel to improve the display effect of the display panel under strong light.

[0059] Exemplarily, each isolation opening 2201 includes a first white light emitting device 2301 and three second white light emitting devices 2302, and the light conversion layer 240 includes a red light conversion portion 241, a green light conversion portion 242, and a blue light conversion portion 243. In addition, the orthographic projections of the three second white light emitting devices 2302 on the substrate 210 are respectively located within the orthographic projections of the red light conversion portion 241, the green light conversion portion 242, and the blue light conversion portion 243 on the substrate 210. Combined with the white light emitted by the first white light emitting device 2301, each isolation opening 2201 can realize R / G / B / W light emission.

[0060] In one embodiment, Figure 5b As shown, the first white light emitting device 2301 and the three second white light emitting devices 2302 in each isolation opening 2201 may be arranged in a 2×2 square.

[0061] Figure 5c A partial top view of a display panel provided in the ninth embodiment of the present application. Figure 5c The display panel and Figure 5b The difference between the display panels shown is that Figure 5c As shown, a plurality of second white light emitting devices 2302 may be arranged around the first white light emitting device 2301. For example, the first white light emitting device 2301 is circular, and three second white light emitting devices 2302 surround the first white light emitting device 2301.

[0062] In one embodiment, the first white light emitting device 2301 can be used as a redundant light emitting device 2301 , that is, the first white light emitting device 2301 does not emit light. In this case, the first electrode of the first white light emitting device 2301 , such as the cathode, is not electrically connected to the isolation structure 220 .

[0063] Figure 6a FIG. 1 is a cross-sectional schematic diagram of a display panel provided in the tenth embodiment of the present application. Figure 6a As shown, the display panel also includes a pixel definition layer 260 disposed on the substrate 210. The pixel definition layer 260 defines a plurality of pixel openings 2601. A plurality of pixel openings 2601 are disposed in an isolation opening 2201. The orthographic projections of the plurality of pixel openings 2601 on the substrate 210 are located within the orthographic projections of the corresponding isolation openings 2201 on the substrate 210. A white light emitting device 230 is disposed in each pixel opening 2601. The above arrangement, compared to an embodiment in which the isolation openings 2201 and the white light emitting devices 230 correspond one to one, can reduce the occupied area of ​​the isolation structure 220, thereby improving the pixel density of the display panel.

[0064] In one embodiment, the sidewalls of the pixel definition layer 260 between at least some adjacent white light emitting devices 230 in the same isolation opening 2201 are concave. As an embodiment, the pixel opening 2601 includes a top end away from the substrate 210 and a bottom end close to the substrate 210, and the orthographic projection of the bottom end on the substrate 210 is located at a portion of the top end on the substrate 210 The orthographic projection range overlaps. Through this arrangement, the sidewalls of the pixel definition layer 260 can isolate the organic light-emitting layer 232 of the adjacent white light emitting device 230 to avoid crosstalk problems between adjacent pixels. At the same time, this structure helps to limit the light emission range of the white light emitting device 230 to improve the light emission purity, thereby improving the display effect of the display panel.

[0065] Since the white light emitting device 230 needs to be electrically connected to the isolation structure 220, the sidewall of the pixel defining layer 260 close to the isolation structure 220 cannot separate the various layers of the light emitting device. In some embodiments of the present application, the orthographic projection of the top end on the substrate 210 is closer to the isolation structure 220 than the orthographic projection of the bottom end on the substrate 210.

[0066] Figure 6b Schematic diagram of a cross section of a display panel provided in the eleventh embodiment of the present application. Figure 6b As shown, in this embodiment, the first white light emitting device 2301 and any second white light emitting device 2302 are bonded. Bonding means that the first white light emitting device 2301 and the second white light emitting device 2302 share an organic light emitting layer and a first electrode, and the first electrode refers to an electrode of the white light emitting device 230 that is away from the substrate 210. In this case, the first white light emitting device 2301 can also emit light. Exemplarily, the light conversion layer 240 can be prepared by inkjet printing or photolithography.

[0067] In order to achieve bonding between the first white light emitting device 2301 and the second white light emitting device 2302, the first white light emitting device 2301 and the second white light emitting device 2302 can be arranged in the same pixel opening 2601. In this case, in the same pixel opening 2601, the first white light emitting device 2301 and the second white light emitting device 2302 share an organic light emitting layer and a first electrode, and the second electrodes of the first white light emitting device 2301 and the second white light emitting device 2302 can be independent of each other or shared. The second electrode refers to the electrode of the white light emitting device 230 close to the substrate 210.

[0068] For example, in order to achieve bonding between the first white light emitting device 2301 and the second white light emitting device 2302, the cross-sectional shape of the pixel definition layer 260 in the light emitting direction between the mutually bonded first white light emitting device 2301 and the second white light emitting device 2302 can also be set to a regular trapezoid. In this case, the organic light emitting layer and the first electrode of the first white light emitting device 2301 and the second white light emitting device 2302 can be climbed on the pixel definition layer 260 to be shared.

[0069] It is understandable that the specific shapes of the first white light emitting device 2301 and the plurality of second white light emitting devices 2302 and the color of the corresponding light conversion layer 240 can be set according to actual conditions, and this application does not make any specific limitation on this.

[0070] The above describes in detail the arrangement of pixels in the display panel. Figure 7 The specific structure of the isolation structure is further introduced.

[0071] Figure 7 Schematic cross-sectional view of the isolation structure provided in the twelfth embodiment of the present application. The isolation structure is applicable to the array substrate provided in any of the above embodiments. Figure 7 As shown, the isolation structure 220 includes a first substructure 221 and a second substructure 222 which are stacked, and the first substructure 221 is located on a side of the second substructure 222 close to the substrate 210. The orthographic projection of the first substructure 221 on the substrate 210 is within the range of the orthographic projection of the second substructure 222 on the substrate 210.

[0072] Through the above arrangement, during the preparation process, the isolation structure 220 can separate the evaporated film layer, so that the film layers of the white light emitting device in different isolation openings 2201 are independent of each other, thereby improving the color purity and the display effect of the display panel. At the same time, it is not necessary to use a fine metal mask during the preparation process, thereby simplifying the preparation process and improving the preparation efficiency.

[0073] At the same time, the first substructure 221 includes a conductive material, and the white light emitting device 230 includes a first electrode 231. The first electrode 231 contacts the first substructure 221, thereby realizing an electrical connection relationship between the isolation structure 220 and the white light emitting device 230. Specifically, the first electrode 231 can be set as an anode or a cathode, which is not specifically limited in this application.

[0074] The isolation structure 220 further includes a third substructure 223 stacked on a side of the first substructure 221 away from the second substructure 222. Optionally, the orthographic projection of the first substructure 221 on the substrate 210 is within the range of the orthographic projection of the third substructure 223 on the substrate 210.

[0075] In some embodiments of the present application, the third substructure 223 includes a conductive material. The first electrode 231 is electrically connected to the third substructure 223 .

[0076] When the white light emitting device 230 is a structure of multiple light emitting layers connected in series, a charge generation layer is provided between adjacent light emitting structures. In order to avoid lateral crosstalk of current in the charge generation layer, part of the charge generation layer is disconnected between adjacent white light emitting devices 230 by isolation columns. At the same time, in order to avoid the first electrode 231 being isolated by the isolation column, the first electrode 231 needs to meet a certain thickness. In the embodiment of the present application, by providing an isolation structure 220 and realizing the connection of the first electrode 231 through the isolation structure, the thickness of the negative first electrode 231 can be relatively reduced. The thickness of the first electrode 231 is greater than or equal to 50 angstroms and less than or equal to 300 angstroms, so as to improve the reliability of the electrical connection relationship between the first electrode 231 and the isolation structure 220.

[0077] In the embodiment of the present application, the second electrode 233 may be a metal total reflection electrode or a transparent electrode. When the material of the second electrode 233 is a transparent material, the substrate may include a stacked thin film transistor array layer and a light absorbing layer, and the light absorbing layer is located on the side of the thin film transistor array layer away from the white light emitting device. Exemplarily, the material of the second electrode 233 is a transparent ITO material, and the material of the light absorbing layer is a light absorbing material such as graphite, so as to increase the integrated black effect of the display panel and improve the heat dissipation performance of the display panel.

[0078] like Figure 7 As shown, in this embodiment, the array substrate may further include a pixel definition layer 260, which is disposed on a side of the isolation structure 220 close to the substrate 210. The pixel definition layer 260 defines a pixel opening 2601, and the pixel opening 2601 is connected to the isolation opening 2201. The second electrode 233 and the organic light-emitting material layer 232 of the white light-emitting device 230 are disposed in the pixel opening 2601 to isolate the second electrode 232 from the isolation structure 220 and avoid a short circuit between the second electrode 232 and the isolation structure 220. The first electrode 231 is stacked on a side of the organic light-emitting material layer 232 away from the second electrode 233, and climbs along the side wall of the pixel opening 2601 surrounded by the pixel definition layer 260 to the side wall of the isolation structure 220 to achieve electrical connection between the first electrode 231 and the isolation structure 220.

[0079] Based on the same inventive concept, the present application also provides a display device, including the display panel provided in the above embodiment of the present application. Since the principle of solving the problem in the display device embodiment is similar to that in the above display panel embodiment, the implementation of the display device embodiment can refer to the implementation of the above display panel embodiment, and the repeated parts will not be repeated.

[0080] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the appended claims.

Claims

1. A display panel, characterized in that: include: substrate; An isolation structure, stacked on one side surface of the substrate, the isolation structure enclosing an isolation opening; as well as The white light emitting device is located in the isolation opening.

2. The display panel according to claim 1, characterized in that: It also includes a light conversion layer, which is stacked on a side of the white light emitting device away from the substrate, and the light conversion layer is located in the isolation opening; Preferably, the light conversion layer includes at least one of a color filter, an organic light-emitting material, a fluorescent light-emitting material or an inorganic light-emitting material; Preferably, the distance from the surface of the light conversion layer away from the substrate to the substrate is smaller than the distance from the surface of the isolation structure away from the substrate to the substrate.

3. The display panel according to claim 2, characterized in that: It also includes a first encapsulation layer stacked between the white light emitting device and the light conversion layer; Preferably, the first encapsulation layer comprises an inorganic material; Preferably, the display panel further comprises a second encapsulation layer, which is stacked on a side of the light conversion layer away from the first inorganic encapsulation layer, and the orthographic projection of the second encapsulation layer on the substrate covers the orthographic projection of the first inorganic encapsulation layer on the substrate; Preferably, the distance from the surface of the second encapsulation layer away from the substrate to the substrate is greater than the distance from the surface of the isolation structure away from the substrate to the substrate; Further preferably, the second encapsulation layer comprises an organic material; Preferably, the display panel further comprises a third encapsulation layer, which is stacked on a side of the second encapsulation layer away from the substrate, and an orthographic projection of the third encapsulation layer on the substrate covers the second encapsulation layer; Further preferably, the third encapsulation layer comprises an inorganic material.

4. The display panel according to claim 2 or 3, characterized in that: One of the white light emitting devices is disposed in each of the isolation openings; The orthographic projection of the white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate, and the white light emitting devices in the plurality of isolation openings are linearly arranged on a plane parallel to the substrate; or The plurality of white light emitting devices include a first white light emitting device and a plurality of second white light emitting devices, the orthographic projection of the first white light emitting device on the substrate does not overlap with the orthographic projection of the light conversion layer on the substrate, and the orthographic projection of the second white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate; Preferably, the first white light emitting device and a plurality of the second white light emitting devices are arranged in an array; Preferably, a plurality of the second white light emitting devices are arranged around the first white light emitting device; Preferably, the light conversion layer comprises a plurality of light conversion parts of different colors, and the light conversion parts are located in the isolation opening; Further preferably, the plurality of light conversion parts include a red light conversion part, a green light conversion part and a blue light conversion part.

5. The display panel according to claim 2 or 3, characterized in that: A plurality of the white light emitting devices are arranged in one of the isolation openings, the display panel further comprising a pixel definition layer arranged on the substrate, the pixel definition layer having a plurality of pixel openings, the orthographic projections of the plurality of pixel openings on the substrate being located within the orthographic projection of a corresponding isolation opening on the substrate, and a white light emitting device is arranged in each of the pixel openings; Preferably, the sidewalls of at least a portion of the pixel definition layer between adjacent white light emitting devices in the same isolation opening are concave; Preferably, the pixel opening includes a top end away from the substrate and a bottom end close to the substrate, and the orthographic projection range of the bottom end on the substrate partially overlaps with the orthographic projection range of the top end on the substrate; Preferably, an orthographic projection of the top end on the substrate is closer to the isolation structure than an orthographic projection of the bottom end on the substrate.

6. The display panel according to claim 5, characterized in that: The orthographic projection of the white light emitting device in the isolation opening on the substrate is located within the orthographic projection of the light conversion layer on the substrate, and the plurality of white light emitting devices in the isolation opening are linearly arranged on a plane parallel to the substrate; or, The plurality of white light emitting devices include a first white light emitting device and a plurality of second white light emitting devices, the orthographic projection of the first white light emitting device on the substrate does not overlap with the orthographic projection of the light conversion layer on the substrate, and the orthographic projection of the second white light emitting device on the substrate is located within the orthographic projection of the light conversion layer on the substrate; Preferably, the first white light emitting device and a plurality of the second white light emitting devices are arranged in an array; Preferably, a plurality of the second white light emitting devices are arranged around the first white light emitting device; Preferably, the light conversion layer comprises a plurality of light conversion parts of different colors, and each of the light conversion parts covers one of the white light emitting devices; Further preferably, the plurality of light conversion parts include a red light conversion part, a green light conversion part and a blue light conversion part.

7. The display panel according to claim 4 or 6, characterized in that: It also includes a light-transmitting portion, which is stacked on a side of the first white light emitting device away from the substrate, and the light-transmitting portion is located in the isolation opening.

8. The display panel according to any one of claims 1 to 3, characterized in that: The isolation structure comprises a first substructure and a second substructure which are stacked, wherein the first substructure is located on a side of the second substructure close to the substrate, and an orthographic projection of the first substructure on the substrate is within the range of an orthographic projection of the second substructure on the substrate; Preferably, the isolation structure further comprises a third substructure, which is stacked on a side of the first substructure away from the second substructure, and the orthographic projection of the first substructure on the substrate is within the range of the orthographic projection of the third substructure on the substrate; Preferably, the first substructure includes a conductive material, and the white light emitting device includes a first electrode, and the first electrode is electrically connected to the first substructure.

9. The display panel according to any one of claims 1 to 3, characterized in that: The white light emitting device includes a first electrode, the first electrode is electrically connected to the isolation structure, and the thickness of the first electrode is greater than or equal to 50 angstroms and less than or equal to 300 angstroms.

10. A display device, characterized in that: A display panel comprising any one of claims 1-9.

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