CN112420948A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN112420948A CN112420948A CN202011280297.3A CN202011280297A CN112420948A CN 112420948 A CN112420948 A CN 112420948A CN 202011280297 A CN202011280297 A CN 202011280297A CN 112420948 A CN112420948 A CN 112420948A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/842—Containers
- H10K50/8428—Vertical spacers, e.g. arranged between the sealing arrangement and the OLED
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
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- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention discloses a display panel and a display device. This display panel divides into display area and non-display area, and display panel includes the base plate, and luminous functional layer sets up in base plate one side non-display area, first dykes and dams set up in non-display area and set up in the one side that luminous functional layer kept away from the base plate, and wherein, first dykes and dams include that the first domatic of being close to the display area is domatic with the second of keeping away from the display area, and the slope of first domatic is less than the slope of second, and the packaging layer covers luminous functional layer and first dykes and dams. According to the technical scheme provided by the embodiment of the invention, the slope of the first slope surface is smaller than that of the second slope surface, so that the first dam plays a role in blocking and preventing overflow in the packaging process, meanwhile, the concentration of stress at the joint of the first slope surface of the first dam and the packaging layer is reduced, the flatness of the packaging layer is improved, the packaging effect of the display panel is improved, the water and oxygen blocking capacity of the display panel in the bending process is improved, and the display effect of the folding display panel is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of display panels, in particular to a display panel and a display device.
Background
Along with the development of display technology and the improvement of living standard of people, flexible display device obtains extensive application, and current flexible display device has the packaging structure to become invalid easily when buckling or solid bending, causes the display panel to hinder the problem of water oxygen ability lower, influence the display effect of product.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, and aims to solve the problem that an existing flexible display device is invalid in a packaging structure during bending or bending.
In order to realize the technical problem, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a display panel, where the display panel is divided into a display area and a non-display area; the display panel includes:
a substrate;
the luminous functional layer is arranged in the non-display area on one side of the substrate;
the first dam is arranged in the non-display area and arranged on one side, far away from the substrate, of the light-emitting functional layer; the first dam comprises a first slope surface close to the display area and a second slope surface far away from the display area, and the gradient of the first slope surface is smaller than that of the second slope surface;
and the packaging layer covers the light-emitting functional layer and the first dam.
Further, the first slope surface is a plane.
Further, the range of the slope of the first slope surface is 15 degrees to 45 degrees.
Further, the first slope surface is a curved surface.
Further, the first slope surface comprises a first sub-curved surface arranged at one end of the first slope surface, which is adjacent to the substrate, and a second sub-curved surface arranged at one end of the first slope surface, which is far away from the substrate;
the slope of the second sub-curved surface is smaller than the slope of the first sub-curved surface.
Further, the slope of the second sub-curved surface is smaller than the slope of the second slope surface.
Further, the encapsulation layer includes a first inorganic layer, an organic layer, and a second inorganic layer;
the first inorganic layer covers the first slope surface and the second slope surface;
the organic layer is arranged on one side of the first inorganic layer far away from the first slope;
the second inorganic layer covers the organic layer and the side of the first inorganic layer far away from the first slope.
Further, the display panel further includes:
the second dam is arranged on one side of the first dam, which is far away from the display area;
the second dam is spaced apart from the first dam.
Further, the height of the second bank is greater than the height of the first bank in a direction perpendicular to the substrate.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel set forth in any of the first aspects.
The display panel provided by the embodiment of the invention is divided into a display area and a non-display area, the display panel comprises a substrate, a light-emitting function layer is arranged in the non-display area on one side of the substrate, a first dam is arranged in the non-display area and is arranged on one side, far away from the substrate, of the light-emitting function layer, wherein the first dam comprises a first slope surface close to the display area and a second slope surface far away from the display area, the slope of the first slope surface is smaller than that of the second slope surface, and an encapsulation layer covers the light-emitting function layer and the first dam. According to the display panel provided by the embodiment of the invention, the slope of the first slope is smaller than that of the second slope, and the packaging layer covers the light-emitting function layer and the first dam, so that the first dam plays a role in blocking and preventing overflow in the packaging process, meanwhile, the concentration of stress at the joint of the first slope of the first dam and the packaging layer is reduced, the flatness of the packaging layer is improved, the packaging effect of the folding or solid curved display panel is improved, the water and oxygen resistance of the folding or solid curved display panel is improved, and the display effect of the folding or solid curved display panel is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a cross section of the display panel along the direction AA' in fig. 1 according to an embodiment of the present invention;
FIG. 3 is an enlarged schematic view of a structure of a region C in FIG. 2 of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present invention;
FIG. 5 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of another display panel according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
As mentioned in the background art, when the conventional flexible display device is folded or bent, the packaging structure is easily failed due to stress concentration of the packaging layer, so that the water and oxygen blocking capability of the packaging layer is reduced, and the display effect of the product is affected.
Based on the above technical problem, the present embodiment proposes the following solutions:
fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of a cross section of the display panel along the direction AA' in fig. 1 according to an embodiment of the present invention. FIG. 3 is a display provided by an embodiment of the present inventionThe structure of the panel in the area C in fig. 2 is enlarged. Referring to fig. 1 to 3, a display panel 100 according to an embodiment of the present invention is divided into a display area 1 and a non-display area 2. The display panel 100 includes a substrate 3, a light emitting function layer 4, a first dam 5 and an encapsulation layer 6, the light emitting function layer 4 is disposed in a non-display region 2 on one side of the substrate 3, the first dam 5 is disposed in the non-display region 2 and disposed on one side of the light emitting function layer 4 away from the substrate 3, wherein the first dam 5 includes a first slope 51 close to the display region 1 and a second slope 52 away from the display region 1, and a slope θ of the first slope 511Slope theta less than second slope 522The encapsulating layer 6 covers the light-emitting functional layer 4 and the first bank 5.
Specifically, in the manufacturing process of the display panel 100, the encapsulation layer 6 needs to be disposed to block water and oxygen in the external environment, and the specific manufacturing process may include: providing a substrate 3, forming a light-emitting function layer 4 on one side of the substrate 3, forming a first dam 5 on one side of the light-emitting function layer 4 of the non-display area 2, which is far away from the substrate 3, and forming an encapsulation layer 6 on one side of the first dam 5, which is far away from the substrate 3, wherein the first dam 5 can be obtained by gluing, soft baking, alignment exposure, post-baking, developing, hard baking and etching. The first dam 5 is made of organic material, the organic material can be coated on the side of the light-emitting function layer 4 of the non-display area 2 far away from the substrate 3 by adopting a coating, spraying or silk-screen printing mode, when the first dam 5 is exposed, the slope of the first slope 51 of the first dam 5 is reduced, and the first dam can be formed by baking after development, and the process is simple and easy. The first slope 51 of the first dam 5 disposed on the non-display region 2 of the display panel can block and prevent overflow during the film formation process of the encapsulation layer 6, and since an uneven pit 10 is easily formed between the first slope 51 of the first dam 5 and the encapsulation layer 6, the flatness of the film formation of the encapsulation layer 6 is affected, and the slope θ of the first slope 51 is set1Slope theta less than second slope 522The pits 10 between the first slope 51 of the first dam 5 and the packaging layer 6 are made as small as possible, the depth of the pits 10 is reduced by reducing the slope of the first slope 51 to improve the flatness of the packaging layer 6, and the intersection between the first slope 51 of the first dam 5 and the packaging layer 6 is reducedThe concentration of the stress at the joint improves the flatness of the packaging layer 6, improves the packaging effect of the display panel 100, and improves the water and oxygen blocking capability of the display panel 100.
The display panel that this embodiment provided is less than the domatic slope of second through setting up the first domatic slope, the packaging layer covers luminous functional layer and first dykes and dams, make first dykes and dams can play the effect that stops and prevent the overflow at the encapsulation in-process, can also reduce the concentration at the first domatic and packaging layer handing-over department stress of first dykes and dams, improve the roughness of packaging layer, improve folding or solid curved display panel encapsulation effect, improve folding or curved display panel's the oxygen ability that blocks water admittedly, promote folding or curved display panel's display effect admittedly.
Optionally, with continued reference to fig. 3, the first ramp surface 51 is a planar surface.
Specifically, the first slope 51 is designed to be a plane, and the process is simple in the manufacturing and forming process, so that the cost is saved.
Optionally, with continued reference to FIG. 3, the slope θ of the first ramp surface 511The range of the angle is 15-45 degrees.
Specifically, the arrangement can prevent the material of the encapsulating layer 6 from overflowing in the encapsulating process, and can also avoid the bulge of the material of the encapsulating layer 6 at the junction of the first slope 51 and the encapsulating layer 6 in the encapsulating process, so that the edge of the encapsulating layer 6 in contact with the first slope 51 of the first dam 5 is smoother, the stress concentration of the encapsulating layer 6 at the junction of the first slope 51 and the encapsulating layer 6 is reduced, and the encapsulating performance of the encapsulating layer 6 in a display panel which is bent or folded and the like is improved.
Optionally, fig. 4 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 4, the first slope surface 51 is a curved surface.
In particular, the first slope 51 may be arranged to have different slopes at different distances from the substrate 3, extending the length of the first slope 51 in a direction away from the substrate 3, such that the flow distance of the material of the encapsulation layer 6 over the first slope 51 is increased, better consuming the energy of the flow of the material of the encapsulation layer 6 over the first slope 51, reducing the risk of overflow of the material of the encapsulation layer 6 out of the first dam 5.
Optionally, fig. 5 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 5, the first slope 51 includes a first sub-curved surface 7 disposed at an end of the first slope 51 adjacent to the substrate 3 and a second sub-curved surface 8 disposed at an end of the first slope 51 away from the substrate 3, and a slope θ of the second sub-curved surface 83Slope theta smaller than the first sub-curved surface 74。
Specifically, the slope θ of the first sub-curved surface 7 is set4Greater than the slope theta of the second sub-curved surface 83On the one hand, the material of the packaging layer 6 at the edge of the first sub-curved surface 7 at one end, close to the substrate 3, of the packaging layer 6 can be saved, on the other hand, the R angle value of the upper end is increased due to the fact that the second sub-curved surface 8 with the small slope is subjected to circular arc processing, the depth of the concave pit 10 between the packaging layer 6 and the second sub-curved surface 8 is further reduced, and the flatness of the edge of the packaging layer 6 in contact with the second sub-curved surface 8 is further improved.
Alternatively, with continued reference to FIG. 5, the slope θ of the second sub-curved surface 8 may be set3Slope theta less than second slope 522。
Specifically, the second slope surface 52 supports the first dam 5, since the packaging layer 6 is adjacent to the second sub-curved surface 8, one side of the packaging layer 6 away from the substrate 3 is closer to the external environment, the risk of fracture is higher, the packaging failure due to water and oxygen erosion in the environment is easily caused, the second sub-curved surface 8 is arranged on one side of the adjacent packaging layer 6 away from the substrate 3, and the slope θ of the second sub-curved surface 8 is arranged3Slope theta less than second slope 522Compared with the planar first slope 51, the boundary between the second sub-curved surface 8 and the packaging layer 6 is an arc curved surface with a smaller slope, when the material on one side of the packaging layer 6 far away from the substrate 1 flows to the surface of the second sub-curved surface 8, the boundary formed by one side of the packaging layer 6 far away from the substrate 3 and the second sub-curved surface 8 is smoother, the depth of a concave pit 10 between the packaging layer 6 and the second sub-curved surface 8 is further reduced, the smoothness of the edge of the packaging layer 6 in contact with the second sub-curved surface 8 is improved, the material of the packaging layer 6 is reduced and accumulated at the junction between the second sub-curved surface 8 and the packaging layer 6, and the packaging layer 6 and the first dike are reducedThe stress concentration at the edge of the dam 5 improves the packaging performance of the folded or bent display panel 100 and improves the water and oxygen resistance of the display panel 100.
Optionally, fig. 6 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 6, the encapsulation layer 6 includes a first inorganic layer 61, an organic layer 62 and a second inorganic layer 63, the first inorganic layer 61 covers the first slope 51 and the second slope 52, the organic layer 62 is disposed on a side of the first inorganic layer 61 away from the first slope 51, the second inorganic layer 63 covers the organic layer 62 and a side of the first inorganic layer 61 away from the first slope 51.
Specifically, the material of the first inorganic layer 61 and the second inorganic layer 63 may be one including silicon nitride, silicon oxide, or silicon oxynitride, and the material of the organic layer 62 may include polyacrylate or polycarbonate. The arrangement is such that the second inorganic layer 63, the organic layer 62 and the first inorganic layer 61 together play a role of blocking water and oxygen, and since the second inorganic layer 63 is disposed on the side of the display panel 100 away from the substrate 3, the second inorganic layer 63 is more easily affected by the external environment than the first inorganic layer 61, and therefore the fracture of the second inorganic layer 63 directly affects the packaging performance of the display panel 100. By arranging the organic layer 62 between the first inorganic layer 61 and the second inorganic layer 63, the organic layer 62 has good fluidity before film formation, can well coat the first inorganic layer 61, and simultaneously improves the surface stress of the second inorganic layer 63. Since the material of the organic layer 62 has good fluidity, the organic layer 62 does not entirely cover the first slope 51 of the first bank 5, and the slope θ of the first slope 51 is set so that the organic layer 62 does not overflow the first bank 51Slope theta less than second slope 522The flow path of the organic layer 62 on the first slope 51 is made longer, the depth of the formed pit 10 is made smaller, and the flatness of the edge of the organic layer 62 adjacent to the first slope 51 is realized as much as possible, so that the film formation of the second inorganic layer 63 is made smoother, the stress concentration of the second inorganic layer 63 on the edge of the first bank 5 is reduced, and the packaging performance of the folded or curved display panel 100 is improved.
Optionally, fig. 7 is a schematic structural diagram of another display panel provided in the embodiment of the present invention. On the basis of the above embodiment, referring to fig. 7, the display panel 100 further includes a second bank 9 disposed on a side of the first bank 5 away from the display region 1, the second bank 9 being spaced apart from the first bank 5.
Specifically, the organic layer 52 included in the encapsulation layer 6 may be formed by inkjet printing, the material of the organic layer 62 is blocked by the first bank 5, and meanwhile, the slope of the first slope 51 of the first bank 9 is smaller than the slope of the second slope 52, so that the flatness of the material of the organic layer 62 at the edge adjacent to the first slope 51 can be increased, which is beneficial to the smooth film formation of the second inorganic layer 63, and reduces the risk of stress concentration of the second inorganic layer 63. Since the organic layer 62 has good fluidity before film formation, in order to prevent the organic layer 62 from overflowing the first bank 5 during film formation, the second bank 9 is disposed on the side of the first bank 5 away from the display region 1, so that when the organic layer 62 overflows the first bank 5, it can block the material of the organic layer 62, and prevent the overflow from affecting the conduction between the circuit of the display panel and the external circuit. By providing a spacing region between the first bank 5 and the second bank 9, it is ensured that even if overflow of the material of the organic layer 62 occurs, the material of the organic layer 62 can be blocked by the second bank 9 at the spacing region between the second bank 9 and the first bank 5, reducing the risk of overflow of the material of the organic layer 62 to the side of the second bank 9 away from the display region 1.
Alternatively, with continued reference to FIG. 7, the height D of the second dam 9 in a direction perpendicular to the substrate 32Is greater than the height D of the first dam 51。
Specifically, since edge overflow of the organic layer 62 is difficult to be precisely controlled, the arrangement can accommodate as much material of the organic layer 62 overflowing the first bank 5 as possible between the first bank 5 and the second bank 9, and prevent the material of the organic layer 62 from overflowing to other positions of the display panel 100 to affect the display effect.
Optionally, fig. 8 is a schematic structural diagram of a display device according to an embodiment of the present invention. On the basis of the above embodiments, referring to fig. 8, a display device 200 provided by an embodiment of the present invention includes the display panel 100 proposed by any of the above embodiments. The beneficial effects of the display panel provided by the above embodiments are not described again.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A display panel is characterized in that the display panel is divided into a display area and a non-display area; the display panel includes:
a substrate;
the luminous functional layer is arranged in the non-display area on one side of the substrate;
the first dam is arranged in the non-display area and arranged on one side, far away from the substrate, of the light-emitting function layer; the first dam comprises a first slope surface close to the display area and a second slope surface far away from the display area, and the gradient of the first slope surface is smaller than that of the second slope surface;
and an encapsulation layer covering the light emitting function layer and the first bank.
2. The display panel according to claim 1,
the first slope surface is a plane.
3. The display panel according to claim 2,
the gradient of the first slope surface ranges from 15 degrees to 45 degrees.
4. The display panel according to claim 1,
the first slope surface is a curved surface.
5. The display panel according to claim 4,
the first slope surface comprises a first sub-curved surface arranged at one end of the first slope surface close to the substrate and a second sub-curved surface arranged at one end of the first slope surface far away from the substrate;
the slope of the second sub-curved surface is smaller than the slope of the first sub-curved surface.
6. The display panel according to claim 5,
the slope of the second sub-curved surface is smaller than the slope of the second slope surface.
7. The display panel according to claim 1,
the encapsulation layer comprises a first inorganic layer, an organic layer and a second inorganic layer;
the first inorganic layer covers the first slope surface and the second slope surface;
the organic layer is arranged on one side, far away from the first slope surface, of the first inorganic layer;
the second inorganic layer covers the organic layer and one side of the first inorganic layer far away from the first slope.
8. The display panel according to claim 1, further comprising:
the second dam is arranged on one side, far away from the display area, of the first dam;
the second dam is spaced apart from the first dam.
9. The display panel according to claim 8,
the height of the second dam is greater than the height of the first dam in a direction perpendicular to the substrate.
10. A display device comprising the display panel according to any one of claims 1 to 9.
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| CN202011280297.3A CN112420948B (en) | 2020-11-16 | 2020-11-16 | Display panel and display device |
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| CN114115601A (en) * | 2021-11-24 | 2022-03-01 | 昆山国显光电有限公司 | Display device |
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|---|---|---|---|---|
| CN114115601A (en) * | 2021-11-24 | 2022-03-01 | 昆山国显光电有限公司 | Display device |
| CN114115601B (en) * | 2021-11-24 | 2023-08-01 | 昆山国显光电有限公司 | Display device |
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| CN112420948B (en) | 2022-09-06 |
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