CN109841752B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN109841752B CN109841752B CN201910088478.7A CN201910088478A CN109841752B CN 109841752 B CN109841752 B CN 109841752B CN 201910088478 A CN201910088478 A CN 201910088478A CN 109841752 B CN109841752 B CN 109841752B
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Abstract
The invention discloses a display panel and a display device, wherein the display panel comprises: a substrate divided into a display area and a non-display area located around the display area; the first packaging layer covers the display area and extends to one side of the at least one blocking dam close to the display area; the first packaging layer is formed by curing a first packaging material, a groove is formed in the blocking dam and used for containing the first packaging material overflowing out of the blocking dam before curing. The groove can absorb and store the overflowing first packaging material before curing, prevent the overflowing first packaging material before curing from overflowing to the outer side of the blocking dam, accurately control the boundary of the first packaging material, prevent liquid materials from overflowing to the boundary to cause the problem of poor bonding force between other packaging layers such as inorganic layers, and improve the anti-water-oxygen capacity of the boundary of the packaging layer so as to improve the yield of products.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) is an Organic thin film electroluminescent device, and has the advantages of simple manufacturing process, low cost, low power consumption, high brightness, wide viewing angle, high contrast, and flexible display.
The OLED electronic display product needs to be packaged to prevent the internal components from being aged and damaged due to the influence of moisture, oxygen and the like penetrating into the OLED electronic display product. However, the current OLED electronic display product is limited by its design structure, so that the yield of the package cannot be further improved.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is how to improve the packaging yield of the OLED electronic display product.
According to a first aspect, an embodiment of the present invention provides a display panel, including a substrate divided into a display area and a non-display area located around the display area; at least one blocking dam disposed on the substrate in the non-display region, a first encapsulation layer covering the display region and extending to a side of the at least one blocking dam adjacent to the display region; the first packaging layer is formed by curing a first packaging material, a groove is formed in the blocking dam and used for containing the first packaging material overflowing the blocking dam before curing.
Optionally, the inner surface of the groove has lyophilic property relative to the first packaging material before curing.
Optionally, the groove opens in a direction away from the substrate, and the groove top dimension is smaller than the groove bottom dimension.
Optionally, the bottom of the groove has at least one collecting region for collecting the first packaging material overflowing the groove before curing; the distance between the bottom surface of the groove and the substrate is gradually increased along the collection region to the direction far away from the collection region on the bottom surface of the groove.
Optionally, the inner surface of the groove has lyophobicity with respect to the first encapsulating material before curing.
Optionally, a flow guide opening is formed in a side wall of the groove facing the display area, and the flow guide opening is in contact with the first encapsulation layer.
Optionally, the planar shape of the blocking dam is a closed figure surrounding the display area.
Optionally, the number of the blocking dams is multiple, and the blocking dams are closed graphs arranged at intervals and surrounding the display area; preferably, in a direction from the display area to the non-display area, a distance from a side surface of each of the blocking dams, which is away from the substrate, to the substrate gradually increases.
Optionally, the display panel further comprises: the second packaging layer is arranged between the first packaging layer and the display area and extends to cover the surface of the blocking dam; and the third packaging layer is arranged on one side of the first packaging layer, which is far away from the display area, and extends to cover the second packaging layer on the surface of the blocking dam.
According to a second aspect, an embodiment of the present invention provides a display device, including: any one of the display panels of the first aspect.
The invention has the following beneficial effects:
1. the method comprises the steps that at least one blocking dam is arranged in a non-display area of a display panel, a groove is formed in the blocking dam and used for containing overflowing first packaging materials, the first packaging layer is formed by solidifying liquid materials, the blocking dam is required to block the overflowing first packaging materials, and the situation that the liquid materials overflow the blocking dam in a small amount possibly exists in the manufacturing process.
2. The inner surface of the groove may be treated with a lyophilic treatment so that the inner surface of the groove has a lyophilic property relative to the first packaging material before curing, and the inner surface having the lyophilic property may better fix the first packaging material before curing in the groove.
3. The groove bottom is provided with at least one collecting area which is used for collecting the first packaging material overflowing the groove before curing, and when the collecting area is arranged on the surface of the groove bottom, a lyophobic layer which has lyophobic property relative to the first packaging material before curing can be formed on the inner surface of the groove, so that the first packaging material before curing and leaking into the groove can be ensured to flow into the collecting area more smoothly, and the centralized treatment is facilitated.
4. A diversion opening is formed in the side wall, facing the display area, of the groove, so that the first packaging material is guided into the groove when the potential energy is large, and the situation that the first packaging material overflows to the outer side of the blocking dam is prevented.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram illustrating a partial cross-sectional structure of a display panel in the prior art;
FIG. 2 is a schematic plan view showing a display panel embodying the present invention;
FIG. 3 shows a schematic cross-sectional A-B view of the display panel shown in FIG. 2;
FIG. 4 shows a schematic cross-sectional view of another display panel;
FIG. 5 is a schematic plan view of another display panel in an embodiment of the invention;
FIG. 6 shows a schematic cross-sectional view A '-A' of FIG. 5;
FIG. 7 is a schematic plan view of another display panel in an embodiment of the invention;
fig. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As described in the background, the current OLED electronic display product is limited in its design structure, so that the packaging yield cannot be further improved. For example, the encapsulation structure of the display panel shown in fig. 1, as shown in fig. 1, includes a substrate 1, an organic light emitting structure 2 disposed in a display region of the substrate, a first blocking dam 3 and a second blocking dam 4 disposed in a non-display region of the substrate, and an encapsulation layer composed of a first inorganic layer 5, an organic layer 6, and a second inorganic layer 7. In the actual process debugging and production process of the display panel, the situation that a small amount of organic layers overflow to the outer side of the first blocking dam 3 which is the blocking dam closest to the substrate display area often occurs, for example, in fig. 1, a small amount of organic layers 6 overflow to the outer side of the first blocking dam 3 closest to the substrate display area before curing, so that the organic layers 6 (the part shown by reference numeral 8 in fig. 1) exist between the first inorganic layers 5 and the second inorganic layers 7, when the second inorganic layers are manufactured, the adhesive force between the first inorganic layers 5 and the second inorganic layers 7 can be reduced, and the possibility of water vapor invasion is increased, so that the encapsulation performance is affected. Even if the dam structure is designed in the non-display area at present, the packaging yield is difficult to be well improved.
In order to improve the packaging yield of the OLED electronic display product, the inventor proposes a display panel, which includes a substrate divided into a display area and a non-display area located around the display area, at least one blocking dam disposed on the substrate in the non-display area, a first packaging layer covering the display area and extending to a side of the at least one blocking dam close to the display area; the first packaging layer is formed by curing a first packaging material, a groove is formed in the blocking dam and used for containing the first packaging material overflowing out of the blocking dam before curing. Because the first packaging layer is formed by curing the liquid material, the blocking dam is required to block, and the situation that the liquid material overflows the blocking dam in a small amount may exist in the manufacturing process, therefore, the groove is formed in the blocking dam and can absorb and store the overflowing first packaging material before curing, the overflowing first packaging material before curing is prevented from overflowing to the outer side of the blocking dam, the boundary of the first packaging material can be accurately controlled, the liquid material is prevented from overflowing to the boundary, and the packaging layer is caused, for example, the problem that the adhesive force between inorganic layers is poor is solved, the water-oxygen resistance of the boundary of the packaging layer can be improved, the packaging performance is improved, and the yield of products is improved.
The display panel of the present embodiment will be described in detail with reference to the accompanying drawings, wherein fig. 2 is a plan view of the display panel of the embodiment of the present invention, and fig. 3 is a cross-sectional view of the display panel shown in fig. 2 along a-B. In the present embodiment, one blocking dam 30 is taken as an example for illustration, and of course, more blocking dams 30 are also applicable in the present embodiment, for example, fig. 8 shows a display panel having two blocking dams. Specifically, referring to fig. 2 and 3, the display panel includes a display area 10 and a non-display area located around the display area 10, the display panel further includes a substrate 20, a blocking dam 30 located on the substrate 20 in the non-display area, a first encapsulation layer 50 extending to a side of the at least one blocking dam 30 close to the display area 10, the first encapsulation layer 50 being formed of a cured first encapsulation material (not shown), and a groove 40 being provided on the blocking dam 30. The groove 40 is used for accommodating the first packaging material overflowing the blocking dam 30 before curing. The display area 10 is the area defined by the dashed box in fig. 2. In this embodiment, the opening direction of the groove 40 is directed to the direction away from the substrate 20, the depth of the groove 40 may be deep to the bottom of the blocking dam 30, and when a small amount of the first encapsulating material before curing overflows the blocking dam 30, the first encapsulating material before curing may flow into the groove 40 to be stored therein, in this embodiment, the groove may be disposed on the blocking dam 30 near the display area 10, or may be disposed on all the blocking dams 30.
In order to better fix the overflowing first packaging material before curing, in this embodiment, the inner surface of the groove 40 may be subjected to a lyophilic treatment, so that the inner surface of the groove 40 has lyophilic relative to the first packaging material before curing, and the inner surface having lyophilic may better fix the first packaging material before curing in the groove 40. In this embodiment, the plasma may be O2Plasma, N2Plasma, NH3At least one of the plasmas.
In order to further prevent the cured first encapsulant stored in the groove 40 of the blocking dam 30 from overflowing to the outside of the blocking dam 30, in an alternative embodiment, as shown in fig. 4, wherein fig. 4 is a cross-section a-B of another display panel shown in fig. 2, the top dimension of the groove 40 is smaller than the bottom dimension of the groove 40, and the cross-section of the groove 40 is made trapezoidal to store more first encapsulant.
In an alternative embodiment, at least one collection area 41 may also be provided at the bottom of the recess 40, the collection area 41 is used for collecting the first encapsulating material overflowing the recess 40 before curing, and in particular, can be seen in the schematic diagrams of the collection area shown in fig. 5 and 6, in which fig. 5 shows the position of the collection area in plan view, fig. 6 is a cross-sectional view a '-a' of fig. 5, in the present embodiment, the display region 10 is rectangular, the blocking dam 30 is disposed in a closed loop shape outside the display region 10, the grooves 40 are respectively disposed along four sides of the rectangle formed by the display region 10, wherein the bottom of the groove 40 on each side is provided with a lower area at any position than other positions, that is, the distance between the bottom surface of the groove 40 and the substrate 20 is gradually increased along the collection region 41 to a direction away from the collection region 41 at the bottom surface of the groove 40. For convenience of manufacturing, in this embodiment, one end of each side may be provided with a collection region, where a common collection region of the two sides may be provided at a focus of the two intersecting sides, as shown in fig. 5, two collection regions may be provided, which are respectively located on any two opposite corners of a rectangle formed by the blocking dams 30, and the other two opposite corners are respectively positions where the distance between the bottom surface of the groove 40 and the substrate 20 is the largest; four collection regions may be provided at four corners of the rectangle formed by the blocking dams 30, wherein the center of each side is a position where the distance between the bottom surface of the groove 40 where the side is located and the substrate 20 is the largest. Of course, the collection area may be disposed at any position of the bottom of the groove 40, and the collection area may be one or more, and is not limited to the exemplary illustration in the above embodiment.
In order to facilitate the liquid collection, in an alternative embodiment, when the bottom surface of the groove 40 is provided with the collection area, a lyophobic layer having lyophobicity with respect to the first encapsulant material before curing may be formed on the inner surface of the groove 40, in a specific embodiment, the lyophobic layer formed by the lyophobic material may be attached to the inner surface of the groove 40, or the inner surface of the groove 40 may be surface-treated by plasma to modify the material of the inner surface of the groove 40 into the lyophobic material. In the present embodiment, the barrier dam 30 may be modified with a halogen element and/or an inert gas. Examples of the halogen element include fluorine, chlorine, bromine, and the like. For example, a corresponding plasma may be obtained in a plasma treatment with an organic of these halogen elements, thereby creating a lyophobic layer on the inner surface of the groove 40. After the lyophobic layer is formed on the surface of the groove 40, the first encapsulating material before curing, which leaks into the groove 40, can be ensured to flow into the collecting area more smoothly for centralized processing.
As an alternative embodiment, as shown in fig. 7, in order to prevent the first encapsulant from flowing over the blocking dam 30 before curing, for example, when the first encapsulant is too much, the potential energy is too much, so that the first encapsulant directly passes over the groove 40 and overflows to the outside of the blocking dam 30, in this embodiment, the groove 40 may be configured such that the side wall of the groove 40 facing the display region 10 is provided with a flow guiding opening 42, the flow guiding opening 42 is in contact with the first encapsulant layer 50, and the first encapsulant is guided into the groove 40 when the potential energy is too much, so as to prevent the first encapsulant from overflowing to the outside of the blocking dam 30.
As a preferred embodiment, the opening of the groove 40 facing away from the substrate 20 may be sealed by some thin film layers, specifically, a layer of organic or inorganic thin film may be attached to the opening of the groove 40, the thin film at the opening of the groove 40 is retained by photolithography, the groove 40 is made into a cavity with a diversion opening 42 only on the side surface, and the first packaging material is completely stored in the groove 40 to prevent the leakage phenomenon.
As an alternative embodiment, as shown in fig. 8, the blocking dam 30 may be plural, and the plural blocking dams 30 are closed rings arranged at intervals to surround the display area. In the present embodiment, two blocking dams 30 are taken as an example for explanation, and the distance from the side surface of the blocking dam away from the substrate to the substrate gradually increases from the display area to the non-display area, that is, the height of the blocking dam gradually increases from the display area to the non-display area. The display panel may further include a second encapsulation layer 60 and a third encapsulation layer 70, the second encapsulation layer 60 being disposed between the first encapsulation layer 50 and the display area 10 and extending to cover the surface of the blocking dam 30; and a third encapsulation layer 70 disposed on a side of the first encapsulation layer 50 away from the display region 10 and extending to cover the second encapsulation layer 60 on the surface of the barrier dam 30, in this embodiment, the first encapsulation layer 50 may be an organic layer, and the second encapsulation layer 60 and the third encapsulation layer 70 may be inorganic layers. For example, the second sealing layer 60 and the third sealing layer 70 may be made of an inorganic material such as silicon nitride, silicon oxide, silicon oxynitride, or fluoride, and the inorganic material has high density and can prevent the intrusion of water, oxygen, or the like. For example, the first encapsulation layer 50 includes an organic material, such as a polymer resin, e.g., polyethylene terephthalate, polyacrylate, etc. As such, the first encapsulation layer 50 may relieve stress of the second encapsulation layer 60 and the third encapsulation layer 70. Moreover, the first encapsulating material is limited in the dam close to the display region 10, so that the adhesive force of the overflowing first encapsulating material to the second encapsulating layer 60 and the third encapsulating layer 70 at the edge can be prevented from being reduced, and the encapsulating performance of the edge can be improved. In addition, a material such as a desiccant may be provided in the first encapsulating layer 50, so that the first encapsulating layer encapsulates the display panel and absorbs substances such as water and oxygen that enter the display panel, thereby further protecting the components in the display panel.
Embodiments of the present invention further provide a display device, including the display panel according to any of the above embodiments. In this embodiment, the display device may be a product or a component having a display function, such as a mobile phone, a tablet, a television, a monitor, a palm computer, an ipod, a digital camera, and a navigator.
Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations fall within the scope defined by the appended claims.
Claims (10)
1. A display panel, comprising:
the display device comprises a substrate, a display area and a non-display area, wherein the substrate is divided into the display area and the non-display area which is positioned around the display area;
at least one blocking dam disposed on the substrate in the non-display area,
the first packaging layer covers the display area and extends to one side, close to the display area, of the at least one blocking dam;
the first packaging layer is formed by curing a first packaging material, a groove is arranged in the blocking dam close to the display area, penetrates through the blocking layer with partial thickness, and is used for containing the first packaging material overflowing the blocking dam before curing;
the groove is provided with a flow guide opening towards the side wall of the display area, and the flow guide opening is in contact with the first packaging layer.
2. The display panel of claim 1,
the inner surface of the groove has lyophilic property relative to the first packaging material before curing.
3. The display panel of claim 1,
the groove top dimension is less than the groove bottom dimension.
4. The display panel of claim 1,
the bottom of the groove is provided with at least one collecting area used for collecting the first packaging material overflowing the groove before curing;
the distance between the bottom surface of the groove and the substrate is gradually increased along the collection region to the direction far away from the collection region on the bottom surface of the groove.
5. The display panel of claim 4,
the inner surface of the groove has lyophobicity relative to the first packaging material before curing.
6. The display panel of claim 1,
the planar shape of the blocking dam is a closed figure surrounding the display area.
7. The display panel of claim 6,
the display area is arranged on the display area, the blocking dams are a plurality of closed graphs which are arranged at intervals and surround the display area.
8. The display panel according to claim 7, wherein a distance from a side surface of each of the blocking dams away from the substrate to the substrate is gradually increased in a direction from the display area to the non-display area.
9. The display panel of claim 1, further comprising:
the second packaging layer is arranged between the first packaging layer and the display area and extends to cover the surface of the blocking dam;
and the third packaging layer is arranged on one side of the first packaging layer, which is far away from the display area, and extends to cover the second packaging layer on the surface of the blocking dam.
10. A display device, comprising:
a display panel as claimed in any one of claims 1-9.
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| CN201910088478.7A CN109841752B (en) | 2019-01-29 | 2019-01-29 | Display panel and display device |
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| CN201910088478.7A CN109841752B (en) | 2019-01-29 | 2019-01-29 | Display panel and display device |
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| CN109841752B true CN109841752B (en) | 2021-09-28 |
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| CN111081625B (en) * | 2019-12-30 | 2023-11-14 | 江苏集萃有机光电技术研究所有限公司 | Silicon-based micro display chip cover plate, display device and manufacturing method thereof |
| CN113517315A (en) * | 2020-04-09 | 2021-10-19 | 上海和辉光电有限公司 | Flexible organic electroluminescent display panel and display device |
| CN111682053B (en) * | 2020-06-24 | 2023-04-11 | 京东方科技集团股份有限公司 | Display panel and display device |
| CN112242099A (en) * | 2020-11-09 | 2021-01-19 | 上海中航光电子有限公司 | Array substrate, display panel and display device |
| CN113097262A (en) * | 2021-03-25 | 2021-07-09 | 深圳市华星光电半导体显示技术有限公司 | Display panel and display device |
| CN113488495B (en) * | 2021-06-16 | 2022-09-09 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN113835256A (en) * | 2021-10-11 | 2021-12-24 | 昆山国显光电有限公司 | Display panel and display device |
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| CN109841752A (en) | 2019-06-04 |
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