CN111490182A - Display back plate, manufacturing method thereof and display device - Google Patents
Display back plate, manufacturing method thereof and display device Download PDFInfo
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- CN111490182A CN111490182A CN202010333985.5A CN202010333985A CN111490182A CN 111490182 A CN111490182 A CN 111490182A CN 202010333985 A CN202010333985 A CN 202010333985A CN 111490182 A CN111490182 A CN 111490182A
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- H10K50/00—Organic light-emitting devices
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- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/124—Insulating layers formed between TFT elements and OLED elements
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Abstract
The invention provides a display back plate, a manufacturing method thereof and a display device. This show backplate includes the base plate, and one side of base plate is provided with first planarization layer, and one side that the base plate was kept away from to first planarization layer is provided with organic luminescent layer, shows the backplate and divides into pixel district, cuts off the district and punches the district, cuts off the district and sets up around punching the district, and the pixel district sets up around cutting off the district, and in cutting off the district, the part that the base plate was kept away from to first planarization layer is provided with at least one annular water oxygen barrier layer around punching the district setting on the surface, and annular water oxygen barrier layer is used for form the interval in the organic luminescent layer in cutting off the district to in the direction of pixel district towards punching the district, organic luminescent layer in cutting off the district is discontinuous. The display back plate is simple in manufacturing process, low in cost, easy to industrialize, capable of effectively preventing water and oxygen from invading and good in reliability.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display back plate, a manufacturing method thereof and a display device.
Background
The technical scheme includes that the display device comprises a display device body, a punching screen, an AMO L ED screen, a display device body and a display screen, wherein the display device body is provided with a plurality of holes, the punching screen is used for replacing a Liuhai screen and a water drop screen, the AMO L ED screen is used for realizing the novel flexible display screen with higher screen occupation ratio, compared with special-shaped screens such as the Liuhai screen and the water drop screen, the screen occupation ratio of the punching screen is further improved, the display device body is more attractive, however, after punching, the problem that the display back plate is damaged due to water and oxygen invasion at the punching position needs to be prevented, the existing manufacturing process of the display back plate capable of preventing the damage caused by the packaging is complex, and industrialization is not easy to realize.
Thus, the related art of the existing display backplane still needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a display back plate which has a simple manufacturing process, a low cost, and an easy industrialization, and can effectively prevent water and oxygen from invading or has a good reliability.
In one aspect of the invention, a display backplane is provided. According to an embodiment of the present invention, the display backplane comprises a substrate, a first planarization layer is disposed on one side of the substrate, an organic light emitting layer is disposed on one side of the first planarization layer away from the substrate, the display backplane is divided into a pixel region, a partition region and a perforated region, the partition region is disposed around the perforated region, the pixel region is disposed around the partition region, at least one annular water and oxygen barrier layer is disposed around the perforated region on a portion of a surface of the first planarization layer away from the substrate in the partition region, and the annular water and oxygen barrier layer is used for forming a gap in the organic light emitting layer in the partition region, so that the organic light emitting layer in the partition region is discontinuous in a direction from the pixel region to the perforated region. The display back plate is simple in manufacturing process, low in cost, easy to industrialize, capable of effectively preventing water and oxygen from invading and good in reliability.
According to the embodiment of the present invention, there is also at least one first annular trench, the first annular trench is located on one side of each annular water-oxygen barrier layer close to the pixel region and/or one side of each annular water-oxygen barrier layer close to the perforated region, and the organic light emitting layer located on the surface of at least one annular water-oxygen barrier layer is disconnected from the organic light emitting layer located on the bottom wall of the first annular trench adjacent to the organic light emitting layer.
According to an embodiment of the invention, the number of said annular water-oxygen barrier layers is 3-4.
According to an embodiment of the present invention, a width of the first annular trench is 4 μm to 8 μm.
According to the embodiment of the invention, at least one second annular groove is further arranged on the surface, away from the substrate, of the first planarization layer, and at least one part of at least one annular water-oxygen barrier layer is arranged on the inner wall of the second annular groove.
According to an embodiment of the invention, the annular water oxygen barrier layer comprises: a first annular portion disposed on an inner wall of the second annular groove; a second annular portion located on a side of the first annular portion close to the pixel region, the second annular portion being disposed at an end of a sidewall of the first annular trench away from the substrate, and an edge of the second annular portion close to the perforated region being connected to an edge of the first annular portion close to the pixel region, the edge of the second annular portion close to the pixel region extending toward the first annular trench adjacent thereto; and a third annular portion located on a side of the first annular portion close to the perforated region, the third annular portion being disposed at an end of a sidewall of the first annular trench away from the substrate, and an edge of the third annular portion close to the pixel region being connected to an edge of the first annular portion close to the perforated region, the edge of the third annular portion close to the perforated region extending toward the first annular trench adjacent thereto.
According to an embodiment of the invention, the display backplane satisfies at least one of the following conditions: the distance between the edge of the second annular part close to the pixel area and the bottom wall of the adjacent first annular groove is 4-6 microns; the distance between the edge of the third annular part close to the perforated area and the bottom wall of the adjacent first annular groove is 4-6 mu m.
According to an embodiment of the invention, the display backplane satisfies at least one of the following conditions: the distance between the edge of the second annular part close to the pixel area and the inner wall surface of the side wall of the adjacent first annular groove is 1-3 mu m; the distance between the edge of the third annular part close to the perforated area and the inner wall surface of the side wall of the adjacent first annular groove is 1-3 mu m.
According to an embodiment of the invention, the display backplane comprises: the substrate; a light-shielding layer disposed on a partial surface of one side of the substrate; the buffer layer is arranged on the surface of the light shielding layer far away from the substrate and part of the surface of the substrate; the thin film transistor array layer is arranged on the surface of the buffer layer, which is far away from the substrate; the first planarization layer is arranged on the surface of the thin film transistor array layer far away from the substrate; at least one annular water-oxygen barrier layer disposed on a portion of the surface of the first planarization layer away from the substrate; and the organic light-emitting layer is arranged on one side of the first planarization layer, which is far away from the substrate, and on the surface of the annular water-oxygen barrier layer, which is far away from the substrate.
In another aspect of the invention, a method of making the display backplane described above is provided. According to an embodiment of the invention, the method comprises: forming a first planarization layer on one side of a substrate; forming an annular water-oxygen barrier layer on a part of the surface of the first planarization layer away from the substrate; and forming an organic light-emitting layer on the side of the first planarization layer far away from the substrate. The method is simple and convenient to operate, easy to realize and easy for industrial production, and the display back plate can be effectively manufactured.
According to an embodiment of the present invention, the step of forming the annular water-oxygen barrier layer on a portion of the surface of the first planarization layer away from the substrate further comprises: forming a second annular trench on the first planarization layer; forming the annular water-oxygen barrier layer on the surface of the first planarization layer far away from the substrate and on the inner wall of the second annular groove; and etching the first planarization layer at the part of the annular water-oxygen barrier layer close to one side of the pixel area and/or the first planarization layer at the part close to one side of the perforated area to form a first annular groove.
In yet another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, the display device includes the display back plate described above. The display device has the advantages of simple manufacturing process, low cost, easy industrialization, effective prevention of water and oxygen invasion, good reliability, and all the characteristics and advantages of the display back plate, and are not described in detail herein.
Drawings
Fig. 1a is a schematic plane structure diagram of a display backplane according to an embodiment of the present invention.
Fig. 1b shows a schematic cross-sectional structure of the display panel of fig. 1a along the line l.
Fig. 2 is a schematic cross-sectional view of a display back plate according to another embodiment of the invention.
Fig. 3 shows a schematic cross-sectional structure of the circular water-oxygen barrier layer of the display panel of fig. 2.
Fig. 4 is a schematic cross-sectional view of a display back plate according to another embodiment of the invention.
FIG. 5 is a schematic cross-sectional view of a display backplane according to an embodiment of the present invention.
FIG. 6 is a flow chart illustrating a method for fabricating a display backplane according to an embodiment of the present invention.
Figure 7 shows a schematic flow diagram of the steps of forming an annular water oxygen barrier layer, in accordance with one embodiment of the present invention.
Fig. 8a, 8b, 8c, 8d and 8e are schematic flow charts illustrating a method for fabricating a display backplate according to another embodiment of the present invention.
Reference numerals:
10: display backplane a: pixel region B: and (3) a partition area C: the perforating area 100: substrate 200: first planarizing layer 210: second planarization layers 300, 300a, 300b, 300c, 300 d: organic light-emitting layer 400: annular water oxygen barrier layer 410: first annular portion 420: second annular portion 430: third annular portion 440: first annular grooves 441, 441a, 441 b: bottom walls 442a, 442 b: side wall 450: second annular groove 460: metal layer 500: light-shielding layer 600: buffer layer 700: thin film transistor array layer 710: active layer 720: gate 730: the gate insulating layer 740: source 750: drain 760: interlayer insulating layer 800: anode 900: pixel defining layer 910: packaging structure
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications.
In one aspect of the invention, a display backplane is provided. Referring to fig. 1a and 1b, according to an embodiment of the present invention, the display backplane 10 comprises a substrate 100, one side of the substrate 100 is provided with a first planarization layer 200, one side of the first planarization layer 200, which is far away from the substrate 100, is provided with an organic light emitting layer, the display backplane 10 is divided into a pixel area a, a partition area B and a perforated area C, the partition area B is disposed around the perforated area C, the pixel area a is disposed around the partition area B, in the partition region B, at least one annular water-oxygen barrier layer 400 is arranged around the perforated region C on the partial surface of the first planarization layer 200 far away from the substrate 100, the circular water oxygen barrier layer 400 is used to form a space in the organic light emitting layer in the blocking region B, so that the organic light emitting layer in the partition region B is discontinuous in a direction of the pixel region a toward the perforated region C. Since the annular water and oxygen barrier layer 400 in the display backplate 10 is disposed on a portion of the surface of the first planarization layer 200, compared with the display backplate in the prior art, the display backplate has the advantages of simple manufacturing process, low cost, easy industrialization, and good reliability, and the display backplate 10 can effectively prevent water and oxygen from invading.
According to the embodiment of the present invention, further, referring to fig. 1b, the display backplane 10 further has at least one first circular trench having a bottom wall 441, the first circular trench is located on a side of each circular water-oxygen barrier layer 400 close to the pixel region a and/or a side of each circular water-oxygen barrier layer 400 close to the perforated region C, the first circular trench has a bottom wall 441, and the organic light emitting layer 300d located on a surface of at least one circular water-oxygen barrier layer 400 is disconnected from the organic light emitting layer 300b located on the bottom wall 441 of the first circular trench adjacent to the circular trench (here, the first circular trench on a side of the circular water-oxygen barrier layer 400 close to the pixel region a is taken as an example for illustration); of course, alternatively, the organic light emitting layer 300d may be disconnected from the organic light emitting layer 300C on the bottom wall of the first circular trench on the side of the circular water-oxygen barrier layer 400 close to the hole region C; or the organic light emitting layer 300d and the organic light emitting layer 300b are disconnected, and the organic light emitting layer 300d and the organic light emitting layer 300c are also disconnected, so that the invasion of water and oxygen can be further effectively prevented, and the organic light emitting device is simple in structure and easy to manufacture.
According to an embodiment of the present invention, referring to fig. 1b, a width d of the first annular trench may be 4 μm to 8 μm. In some embodiments of the present invention, the width d of the first annular trench may specifically be 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, or the like. Therefore, the width of the first annular trench is suitable, and the formed annular water and oxygen barrier layer 400 can better separate the organic light emitting layer 300a and the perforated region C in the pixel region a, so that the display backplane 10 can better prevent water and oxygen from invading, and the reliability is further improved.
According to an embodiment of the present invention, further, the number of the annular water oxygen barrier layer may be plural. In some embodiments of the present invention, referring to fig. 2, the number of the annular water oxygen barrier layers may be two. Furthermore, after a great deal of thorough investigation and verification, the inventor obtains that when the number of the annular water oxygen barrier layers is 3 to 4, the width of the isolation region is not wider on the basis of effectively preventing water oxygen invasion, so that the area of the pixel region is relatively larger, and the display effect of a full-face screen can be further realized; on the other hand, the small number of the annular water-oxygen barrier layers does not lead to the structure being too complex and difficult to realize.
According to an embodiment of the present invention, specifically, referring to fig. 1b and 2, when the annular water-oxygen barrier layer 400 is disposed on the surface of the first planarization layer 200, the process for forming the annular water-oxygen barrier layer 400 is simple, and the specific disposition manner of the annular water-oxygen barrier layer 400 on the first planarization layer 200 is not particularly limited, for example, in some embodiments of the present invention, at least one second annular trench 450 is further disposed on the surface of the first planarization layer 200 away from the substrate 100, and at least a portion of the at least one annular water-oxygen barrier layer 400 is disposed on the inner wall of the second annular trench 450. Therefore, the structure is simple and the production is easy.
Further, according to an embodiment of the present invention, a specific structure of the annular water oxygen barrier layer 400 when at least a portion of the annular water oxygen barrier layer 400 is disposed on the inner wall of the second annular trench 450 is described in detail below with reference to fig. 3:
referring to fig. 3, the annular water oxygen barrier layer includes: a first annular portion 410, the first annular portion 410 being disposed on an inner wall of the second annular groove 450; a second annular portion 420, the second annular portion 420 being located on a side of the first annular portion 410 close to the pixel region a, the second annular portion 420 being disposed at an end of the sidewall 442a of the first annular groove away from the substrate 100, and an edge of the second annular portion 420 close to the perforated region C being connected to an edge of the first annular portion 410 close to the pixel region a, the edge of the second annular portion 420 close to the pixel region a extending toward the first annular groove adjacent thereto (as shown in fig. 3, the first annular groove is a first annular groove having a bottom wall 441a and a sidewall 442 a); and a third annular portion 430, the third annular portion 430 is located on a side of the first annular portion 410 close to the perforated region C, the third annular portion 430 is disposed at an end of the side wall 442b of the first annular trench away from the substrate 100, an edge of the third annular portion 430 close to the pixel region a is connected with an edge of the first annular portion 410 close to the perforated region C, and an edge of the third annular portion 430 close to the perforated region C extends toward the first annular trench adjacent thereto (as shown in fig. 3, the first annular trench is a first annular trench having a bottom wall 441b and a side wall 442 b). Therefore, the annular water and oxygen blocking layer is simple in structure and easy to manufacture, the organic light emitting layer and the perforated area C in the pixel area A can be well separated, the display back plate can better prevent water and oxygen from invading, and the reliability of the display back plate is better.
According to an embodiment of the present invention, further, referring to fig. 3, a distance h between an edge of the second annular portion 420 near the pixel region a and a bottom wall 441a of the adjacent first annular groove1May be 4 to 6 μm, specifically, 4, 5 or 6 μm; in addition, the third annular portion 430 has a spacing h between the edge near the perforated region C and the bottom wall 441b of the adjacent first annular groove2The particle diameter may be 4 to 6 μm, specifically, 4, 5 or 6 μm. The annular water and oxygen blocking layer is close to the edge of the pixel area A and the adjacent distance h between the bottom walls of the first annular grooves1And the distance h between the edge of the perforated area C and the bottom wall of the adjacent first annular groove2Is eachIndependent of each other and not affected each other. Whereby said pitch h1Or the spacing h2In the foregoing range, the organic light emitting layer 300a and the perforated region C in the pixel region a can be better separated, and the display back plate 10 can better prevent water and oxygen from invading, so that the reliability is further improved.
According to an embodiment of the present invention, further, referring to fig. 3, a distance d between an edge of the second annular portion 420 near the pixel region a and an inner wall surface of the sidewall 442a of the adjacent first annular trench1May be 1 μm to 3 μm, specifically, 1 μm, 2 μm, 3 μm or the like; in addition, the distance d between the edge of the third annular portion 430 close to the perforated region C and the inner wall surface of the side wall 442b of the adjacent first annular groove2The thickness may be 1 μm to 3 μm, specifically, 1 μm, 2 μm, or 3 μm. The second annular part 420 of the same annular water-oxygen barrier layer is close to the edge of the pixel region a and the distance d between the inner wall surfaces of the adjacent side walls 442a of the first annular groove1And a distance d between an edge of the third annular portion 430 near the perforated region C and an inner wall surface of the side wall 442b of the adjacent first annular groove2Are independent of each other and do not influence each other. Whereby said distance d1Or the spacing d2In the foregoing range, the organic light emitting layer 300a and the perforated region C in the pixel region a can be better separated, and the display back plate 10 can better prevent water and oxygen from invading, so that the reliability is further improved.
According to an embodiment of the present invention, specifically, referring to fig. 4, the display back plate 10 may specifically include: the substrate 100; a light-shielding layer 500, wherein the light-shielding layer 500 is arranged on a part of the surface of one side of the substrate 100; a buffer layer 600, wherein the buffer layer 600 is disposed on a surface of the light-shielding layer 500 away from the substrate 100 and on a part of the surface of the substrate 100; a thin film transistor array layer 700, wherein the thin film transistor array layer 700 is arranged on the surface of the buffer layer 600 far away from the substrate 100; the first planarization layer 200, the first planarization layer 200 being disposed on a surface of the thin film transistor array layer 700 away from the substrate 100; at least one of the annular water and oxygen barrier layers 400, the annular water and oxygen barrier layer 400 being disposed on a portion of the surface of the first planarization layer 200 away from the substrate 100; and the organic light emitting layer 300, the organic light emitting layer 300 is disposed on a side of the first planarization layer 200 away from the substrate 100 and a surface of the annular water and oxygen barrier layer 400 away from the substrate 100. Therefore, the structure is simple, the production is easy, and the invasion of water and oxygen can be effectively prevented.
Further, in one particular embodiment of the present invention, with reference to fig. 5, as will be appreciated by one skilled in the art, in this display backplane 10, the structures and components of conventional display backplanes may also be specifically included, for example, the thin film transistor array layer may specifically include an active layer 710, a gate electrode 720, a gate insulating layer 730, a source electrode 740, a drain electrode 750, an interlayer insulating layer 760 and the like, the display backplane 10 may further include an anode 800, a pixel defining layer 900, an encapsulation structure 910, a second planarization layer 210, a metal layer 460, and the like, wherein, the metal layer 460 is used for connecting the source 740 and the anode 800 of the thin film transistor, which serves as a metal trace in the display backplane, the annular water oxygen barrier layer 400 of the present invention, as previously described, may be formed simultaneously with the metal layer 460, the manufacturing process is simpler, additional steps are not needed, and the industrial production is easy to realize; in addition, it can be understood by those skilled in the art that the specific connection relationship between the aforementioned components in the display back plate 10 of the present invention can be the same as that of the conventional display back plate, and thus the description thereof is not repeated.
In another aspect of the invention, a method of making the display backplane described above is provided. According to an embodiment of the invention, referring to fig. 6, and fig. 8a, 8b, 8c, 8d, 8e, the method comprises the steps of:
s100: a first planarization layer 200 is formed on one side of the substrate 100 (see fig. 8a for a schematic structural diagram).
According to an embodiment of the present invention, the process of forming the first planarization layer 200 on one side of the substrate 100 may include vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing, and the like. The process parameters of vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing and the like can be the process parameters of conventional vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing and the like, and are not described in detail herein. Therefore, the preparation process is simple and convenient, is easy to realize and is easy for industrial production.
S200: and forming an annular water and oxygen barrier layer on the part of the surface of the first planarization layer far away from the substrate.
According to an embodiment of the present invention, further, referring to fig. 7, the step of forming the annular water-oxygen barrier layer on the portion of the surface of the first planarization layer away from the substrate may specifically include the following steps:
s210: a second annular trench 450 is formed on the first planarization layer 200 (refer to fig. 8b for a schematic structural diagram).
According to an embodiment of the present invention, a specific process for etching the second annular trench 450 may be dry etching or wet etching, and process conditions and parameters of the specific etching are not particularly limited, and are not described herein again.
S220: the annular water-oxygen barrier layer 400 is formed on the surface of the first planarization layer 200 away from the substrate 100 and on the inner wall of the second annular trench 450 (the structural diagram refers to fig. 8 c).
According to an embodiment of the present invention, the step of forming the annular water and oxygen barrier layer 400 on the surface of the first planarization layer 200 away from the substrate 100 and on the inner wall of the second annular trench 450 may be specifically formed by a patterning process, and the patterning process may include steps of forming a preformed metal layer, coating a photoresist, exposing, developing, etching, stripping the photoresist, and the like, so as to form the annular water and oxygen barrier layer 400. The specific process parameters and the like of each step in the composition process are process parameters of a conventional composition process, and are not described in detail herein. Therefore, the preparation process is simple and convenient, is easy to realize and is easy for industrial production.
S230: etching a portion of the first planarization layer 200 on a side of the annular water-oxygen barrier layer 400 close to the pixel region and/or a portion of the first planarization layer 200 on a side close to the perforated region to form a first annular trench 440 (the structural schematic diagram refers to fig. 8d, it should be noted that, in fig. 8d, the etching of the first planarization layer 200 on both sides of the annular water-oxygen barrier layer 400 is taken as an example for description, and it can be understood by those skilled in the art that, in the present invention, only a portion of the first planarization layer 200 on a side of the annular water-oxygen barrier layer 400 close to the pixel region or a portion of the first planarization layer 200 on a side of the perforated region may be etched.
According to an embodiment of the present invention, a specific process for etching the first annular trench 440 may be dry etching or wet etching, and process conditions and parameters of the specific etching are not particularly limited, and are not described herein again in detail.
S300: an organic light emitting layer 300 is formed on a side of the first planarization layer 200 away from the substrate 100 (see fig. 8e for a schematic structural diagram).
According to an embodiment of the present invention, the process of forming the organic light emitting layer 300 on the side of the first planarization layer 200 away from the substrate 100 may include vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing, and the like. The process parameters of vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing and the like can be the process parameters of conventional vacuum evaporation, chemical vapor deposition, spin coating, inkjet printing and the like, and are not described in detail herein. Therefore, the preparation process is simple and convenient, is easy to realize and is easy for industrial production.
In yet another aspect of the present invention, a display device is provided. According to an embodiment of the present invention, the display device includes the display back plate described above. The display device has the advantages of simple manufacturing process, low cost, easy industrialization, effective prevention of water and oxygen invasion, good reliability, and all the characteristics and advantages of the display back plate, and are not described in detail herein.
According to the embodiment of the present invention, the display device further includes other necessary structures and components besides the display back plate described above, and those skilled in the art can supplement and design the display device according to the specific kind and use requirements of the display device, and therefore, redundant description is not repeated herein.
According to an embodiment of the present invention, the specific kind of the display device is not particularly limited, for example, including but not limited to a mobile phone, a tablet computer, a wearable device, a game machine, and the like.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (12)
1. The utility model provides a display back plate, its characterized in that, includes the base plate, one side of base plate is provided with first planarization layer, first planarization layer is kept away from one side of base plate is provided with organic luminescent layer, display back plate divides into pixel district, partition area and the district that punches, partition area centers on the district that punches sets up, pixel district centers on partition area sets up in the district, first planarization layer is kept away from be provided with on the partial surface of base plate centers on at least one annular water oxygen barrier layer that the district that punches set up, annular water oxygen barrier layer is used for form the interval in the organic luminescent layer in the partition area to in the direction of the district that punches the district towards the pixel district, organic luminescent layer in the partition area is discontinuous.
2. The display backplane according to claim 1, further comprising at least one first circular trench, wherein the first circular trench is located on a side of each of the circular water-oxygen barrier layers adjacent to the pixel region and/or on a side of each of the circular water-oxygen barrier layers adjacent to the perforated region, and wherein the organic light emitting layer on a surface of at least one of the circular water-oxygen barrier layers is disconnected from the organic light emitting layer on a bottom wall of the first circular trench adjacent thereto.
3. The display backsheet according to claim 1, wherein the number of the annular water-oxygen barrier layers is 3 to 4.
4. The display backplane of claim 2, wherein the first annular trench has a width of 4 μ ι η to 8 μ ι η.
5. The display backplane of claim 1, wherein the surface of the first planarization layer remote from the substrate is further provided with at least one second annular groove, and at least a portion of at least one of the annular water-oxygen barrier layers is disposed on an inner wall of the second annular groove.
6. The display backsheet of claim 5, wherein the annular water oxygen barrier layer comprises:
a first annular portion disposed on an inner wall of the second annular groove;
a second annular portion located on a side of the first annular portion close to the pixel region, the second annular portion being disposed at an end of a sidewall of the first annular trench away from the substrate, and an edge of the second annular portion close to the perforated region being connected to an edge of the first annular portion close to the pixel region, the edge of the second annular portion close to the pixel region extending toward the first annular trench adjacent thereto; and
a third annular portion located on a side of the first annular portion close to the perforated region, the third annular portion being disposed at an end of a sidewall of the first annular trench away from the substrate, and an edge of the third annular portion close to the pixel region being connected to an edge of the first annular portion close to the perforated region, the edge of the third annular portion close to the perforated region extending toward the first annular trench adjacent thereto.
7. A display backplane according to claim 6, characterized in that at least one of the following conditions is fulfilled:
the distance between the edge of the second annular part close to the pixel area and the bottom wall of the adjacent first annular groove is 4-6 microns;
the distance between the edge of the third annular part close to the perforated area and the bottom wall of the adjacent first annular groove is 4-6 mu m.
8. A display backplane according to claim 6, characterized in that at least one of the following conditions is fulfilled:
the distance between the edge of the second annular part close to the pixel area and the inner wall surface of the side wall of the adjacent first annular groove is 1-3 mu m;
the distance between the edge of the third annular part close to the perforated area and the inner wall surface of the side wall of the adjacent first annular groove is 1-3 mu m.
9. The display backplane of claim 1, comprising:
the substrate;
a light-shielding layer disposed on a partial surface of one side of the substrate;
the buffer layer is arranged on the surface of the light shielding layer far away from the substrate and part of the surface of the substrate;
the thin film transistor array layer is arranged on the surface of the buffer layer, which is far away from the substrate;
the first planarization layer is arranged on the surface of the thin film transistor array layer far away from the substrate;
at least one annular water-oxygen barrier layer disposed on a portion of the surface of the first planarization layer away from the substrate; and
the organic light-emitting layer is arranged on one side, away from the substrate, of the first planarization layer and on the surface, away from the substrate, of the annular water and oxygen barrier layer.
10. A method of making the display backplane of any of claims 1-9, comprising:
forming a first planarization layer on one side of a substrate;
forming an annular water-oxygen barrier layer on a part of the surface of the first planarization layer away from the substrate;
and forming an organic light-emitting layer on the side of the first planarization layer far away from the substrate.
11. The method of claim 10, wherein the step of forming the annular water-oxygen barrier layer on a portion of the surface of the first planarizing layer away from the substrate further comprises:
forming a second annular trench on the first planarization layer;
forming the annular water-oxygen barrier layer on the surface of the first planarization layer far away from the substrate and on the inner wall of the second annular groove;
and etching the first planarization layer at the part of the annular water-oxygen barrier layer close to one side of the pixel area and/or the first planarization layer at the part close to one side of the perforated area to form a first annular groove.
12. A display device comprising the display back sheet according to any one of claims 1 to 9.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109801956A (en) * | 2019-03-13 | 2019-05-24 | 京东方科技集团股份有限公司 | Display device, display panel and its manufacturing method |
| CN110265471A (en) * | 2019-07-04 | 2019-09-20 | 京东方科技集团股份有限公司 | Display device, display panel and its manufacturing method |
| CN110429118A (en) * | 2019-07-31 | 2019-11-08 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109801956A (en) * | 2019-03-13 | 2019-05-24 | 京东方科技集团股份有限公司 | Display device, display panel and its manufacturing method |
| CN110265471A (en) * | 2019-07-04 | 2019-09-20 | 京东方科技集团股份有限公司 | Display device, display panel and its manufacturing method |
| CN110429118A (en) * | 2019-07-31 | 2019-11-08 | 云谷（固安）科技有限公司 | Display panel and preparation method thereof and display device |
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