CN117396022A - Display panel and display device - Google Patents
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- CN117396022A CN117396022A CN202311352664.XA CN202311352664A CN117396022A CN 117396022 A CN117396022 A CN 117396022A CN 202311352664 A CN202311352664 A CN 202311352664A CN 117396022 A CN117396022 A CN 117396022A
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- 239000000758 substrate Substances 0.000 claims abstract description 48
- 238000004806 packaging method and process Methods 0.000 claims abstract description 26
- 238000005538 encapsulation Methods 0.000 claims description 98
- 230000000903 blocking effect Effects 0.000 claims description 52
- 230000003287 optical effect Effects 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 174
- 239000000463 material Substances 0.000 description 27
- 238000007641 inkjet printing Methods 0.000 description 25
- 238000000034 method Methods 0.000 description 25
- 230000008569 process Effects 0.000 description 19
- 239000012790 adhesive layer Substances 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000011368 organic material Substances 0.000 description 8
- 238000013459 approach Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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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
- H10K50/844—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
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a display panel and a display device, wherein the display panel comprises a display area and a frame area surrounding the display area, the display panel comprises a substrate, a packaging layer positioned at one side of the substrate, a color resistance layer positioned at one side of the packaging layer, which is away from the substrate, and a planarization layer positioned between the packaging layer and the color resistance layer, and the planarization layer is used for providing a flat surface for the color resistance layer, so that the thickness difference of the color resistance layer in the edge area of the display area and the middle area of the display area is reduced, the brightness difference of the edge area and the middle area of the display area is balanced, and the display performance of the display panel is improved.
Description
The invention is based on the application of 2021, 12, 29 and 202111639889.4
The patent application entitled "display Panel and display device" is filed as a divisional application.
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Along with the continuous development of science and technology, various display devices are widely applied to the life and work of people, and great convenience is brought to the daily life of people.
The display panel is one of important components of the display device, and the structural design of the display panel directly or indirectly affects the display effect of the display device.
Based on the current display panel, the thickness of the color resistance layer at the edge area of the display area is smaller than that of the color resistance layer at the middle area of the display area, so that the brightness of the edge area of the display area is higher, and the brightness difference exists between the edge area and the middle area of the display area.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, which have the following technical solutions:
a display panel including a display area and a bezel area surrounding the display area, the display panel comprising:
a substrate;
the packaging layer is positioned on one side of the substrate;
the color resistance layer is positioned on one side of the packaging layer away from the substrate;
and the planarization layer is positioned between the packaging layer and the color resistance layer and provides a flat surface for the color resistance layer.
A display device comprising the display panel described above.
Compared with the prior art, the invention has the following beneficial effects:
according to the display panel provided by the invention, the planarization layer is arranged between the packaging layer and the color resistance layer and is used for providing a flat surface for the color resistance layer, so that the thickness difference of the color resistance layer in the edge area of the display area and the middle area of the display area is reduced, the brightness difference of the edge area and the middle area of the display area is balanced, and the display performance of the display panel is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of a display panel according to the prior art;
fig. 2 is a schematic top view of a display panel according to an embodiment of the invention;
FIG. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 10 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 12 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 14 is a schematic top view of another display panel according to an embodiment of the invention;
FIG. 15 is a schematic top view of a display panel according to another embodiment of the present invention;
FIG. 16 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 17 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention;
FIG. 18 is a schematic top view of a display panel according to another embodiment of the present invention;
fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of a display panel according to the prior art, and as shown in fig. 1, an organic material layer 01 in an encapsulation layer is formed by means of IJP (InkJet Printing) during the formation of the encapsulation layer, so that the organic material layer 01 may also be referred to as an IJP layer in the art.
In the formation of the IJP layer, however, a height difference occurs between the middle region 01A and the edge region 01B of the IJP layer due to a backflow phenomenon of the monomer, that is, the thickness of the edge region 01B of the IJP layer gradually decreases in a direction in which the display area AA is directed toward the frame area BB.
As shown in fig. 1, a part of the edge area 01B of the IJP layer is located in the display area AA and a part thereof is located in the frame area BB, and it can be found that the thickness of the part of the edge area 01B of the IJP layer located in the display area AA gradually decreases in the direction from the display area AA to the frame area BB, that is, the surface of the part of the IJP layer facing away from the substrate is a non-flat surface, and a slope shape may occur.
If the color resist layer 02 is directly formed on the surface of the part of the IJP layer, which is away from the substrate, the color resist material will flow during the formation of the color resist layer 02, so that the thickness of the color resist layer 02 in the edge area of the display area AA is smaller than the thickness of the color resist layer 02 in the middle area of the display area AA, resulting in higher brightness in the edge area of the display area AA and a brightness difference between the edge area and the middle area of the display area.
Based on the technical problem existing in the prior art, the application provides a display panel, by forming a flatness adjustment component, an encapsulation layer is adjusted so that the surface of the encapsulation layer in the edge area of a display area is parallel to the plane where the substrate is located, or the surface of the encapsulation layer in the edge area of the display area approaches to the plane infinitely, the thickness difference of the encapsulation layer in the edge area of the display area is reduced, the thickness difference of a color resistance layer in the edge area of the display area and the middle area of the display area is reduced, and/or the thickness difference of the color resistance layer in the edge area of the display area and the middle area of the display area is reduced, so that the brightness difference of the edge area of the display area and the middle area of the display area is balanced, and the flatness adjustment component is located in a frame area and does not influence the display effect of the display area, so that the display performance of the display panel is finally improved.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 2, fig. 2 is a schematic top view of a display panel according to an embodiment of the present invention, where the display panel includes a display area AA and a frame area BB surrounding the display area AA, and further, the display area AA further includes a display area middle area AA1 and a display area edge area AA2 surrounding the display area middle area AA 1.
Referring to fig. 3, fig. 3 is a schematic cross-sectional view of a display panel according to an embodiment of the invention.
The display panel includes:
a substrate 11; and an encapsulation layer 12 on one side of the substrate 11.
And a color resist layer 13 positioned on the side of the encapsulation layer 12 away from the substrate 11.
And a flatness adjusting part 14 located on one side of the substrate 11, the flatness adjusting part 14 being located at least in the frame area BB.
Specifically, as shown in fig. 3, the encapsulation layer 12 covers the light emitting area 15, the light emitting area 15 is located in the display area AA, and the encapsulation layer 12 includes a first encapsulation layer 121, a second encapsulation layer 122, and a third encapsulation layer 123 stacked in a first direction, where the first direction is perpendicular to the substrate 11 and is directed from the substrate 11 to the encapsulation layer 12.
The display panel further includes a package retaining wall 16, where the package retaining wall 16 is located in the frame area BB and is used for blocking the second package layer 122.
The material of the second encapsulation layer 122 is an organic material and is formed by means of IJP (Ink Jet Printing), so that the second encapsulation layer 122 may also be referred to as an IJP layer in the technical field of the present application. In addition, as can be seen from the above, during the inkjet printing process of the second encapsulation layer 122, the height difference between the middle region 122A and the edge region 122B of the second encapsulation layer 122 is caused by the reflow phenomenon of the monomer, that is, the thickness of the edge region 122B of the second encapsulation layer 122 gradually decreases in the direction of the display area AA pointing to the frame area BB.
In the inkjet printing process of the second encapsulation layer 122, in order to prevent the material from excessively flowing into the frame area BB, the application is further provided with the encapsulation retaining wall 16 positioned in the frame area BB, so as to prevent the organic material from flowing into one side of the encapsulation retaining wall 16 deviating from the display area AA, and the first encapsulation layer 121 and the third encapsulation layer 123 are contacted at the encapsulation retaining wall 16, so that the second encapsulation layer 122 is sealed between the first encapsulation layer and the third encapsulation layer, the encapsulation effect is better, the maximum protection of the display area AA of the display panel is realized, and the display life and the display effect of the display panel are improved.
The materials of the first and third encapsulation layers 121 and 123 may be inorganic materials.
Further, as shown in fig. 3, in this embodiment of the present application, the flatness adjustment component 14 is formed in the border area BB of the display panel, by adjusting the second encapsulation layer 122 so that the surface of the second encapsulation layer 122 located in the border area AA2 of the display area is parallel to the plane where the substrate 11 is located, or the surface of the second encapsulation layer 122 located in the border area AA2 of the display area approaches to the plane infinitely, the thickness difference of the second encapsulation layer 122 on the border area AA2 of the display area is reduced, thereby reducing the thickness difference of the color resist layer 13 in the border area AA2 of the display area and the middle area AA1 of the display area, and/or adjusting the thickness difference of the color resist layer 13 in the border area AA2 of the display area and the middle area AA1 of the display area is reduced, so as to balance the brightness difference of the border area AA2 of the display area and the middle area AA1 of the display area, and the flatness adjustment component 14 located in the border area BB does not affect the display effect of the display area AA, thereby finally improving the display performance of the display panel.
Note that, the specific structure of the flatness adjusting part 14 that can realize the above-described functions is many in the present application, and therefore, only the flatness adjusting part 14 is illustrated in fig. 3, and the specific structure of the flatness adjusting part 14 is not embodied, and will be described in the following embodiments.
The flatness adjustment component 14 may include an adjustment retaining wall, which is located in the frame area BB and located on a side of the package retaining wall 16 near the display area AA.
In particular, the adjustment retaining wall is located between the encapsulation retaining wall 16 and the display area AA, and optionally the adjustment retaining wall may be located between the substrate 11 and the encapsulation layer 12, and/or may be located on a side of the encapsulation layer 12 facing away from the substrate 11.
When the retaining wall is adjusted between the substrate 11 and the encapsulation layer 12, in order to slow down the flow of the organic material in the inkjet printing process of the second encapsulation layer 122, the slope area of the second encapsulation layer 122 is expanded outwards towards the frame area, so that the surface of the second encapsulation layer 122 located in the edge area AA2 of the display area approaches to the plane infinitely, and the thickness difference of the second encapsulation layer 122 on the edge area AA2 of the display area is reduced, so that the thickness difference of the color resistance layer 13 in the edge area AA2 of the display area and the middle area AA1 of the display area is reduced.
When the adjusting retaining wall is located at a side of the encapsulation layer 12 away from the substrate 11, the adjusting retaining wall is used for slowing down the flow of the color resist material in the formation process of the color resist layer 13, so as to reduce the thickness difference of the color resist layer 13 between the display area edge area AA2 and the display area middle area AA 1.
If the adjusting retaining wall is disposed between the substrate 11 and the encapsulation layer 12 and on the side of the encapsulation layer 12 away from the substrate 11, the thickness difference of the color resistance layer 13 in the display area edge area AA2 and the display area middle area AA1 can be reduced to the greatest extent, so as to balance the brightness difference between the display area edge area AA2 and the display area middle area AA1, and the adjusting retaining wall is located in the frame area BB, so that the display effect of the display area is not affected, and finally the display performance of the display panel is improved.
Optionally, in another embodiment of the present invention, referring to fig. 4, fig. 4 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention, the adjusting retaining wall includes a first retaining wall 141, the first retaining wall 141 is located between the substrate 11 and the encapsulation layer 12, and the second encapsulation layer 122 covers the first retaining wall 141.
Specifically, in the display panel structure shown in fig. 4, the adjustment retaining wall is located between the substrate 11 and the encapsulation layer 12, that is, the first retaining wall 141 is located between the substrate 11 and the encapsulation layer 12, and the first retaining wall 141 is located in the frame area BB of the display panel and between the encapsulation retaining wall 16 and the display area AA.
As shown in fig. 4, by forming the first retaining wall 141 in the frame area BB of the display panel, the flow of the material can be slowed down during the ink jet printing process of the second encapsulation layer 122, so as to expand the slope area of the second encapsulation layer 122 outward toward the frame area BB, so that the surface of the second encapsulation layer 122 located in the edge area AA2 of the display area approaches to the plane infinitely, the thickness difference of the second encapsulation layer 122 on the edge area AA2 of the display area is reduced, thereby reducing the thickness difference of the color resist layer 13 in the edge area AA2 of the display area and the middle area AA1 of the display area, further balancing the brightness difference of the edge area AA2 of the display area and the middle area AA1 of the display area, and the first retaining wall 141 located in the frame area BB does not affect the display effect of the display area AA, and finally improving the display performance of the display panel.
Optionally, in another embodiment of the present invention, referring to fig. 5, fig. 5 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
The height H1 of the first retaining wall 141 is higher than the height H2 of the package retaining wall 16.
Specifically, the height H1 of the first retaining wall 141 refers to a distance between a first surface of the first retaining wall 141 and a second surface of the first retaining wall 141 in the first direction, where the first surface of the first retaining wall 141 is a surface of the first retaining wall 141 facing away from the substrate 11, and the second surface of the first retaining wall 141 is a surface of the first retaining wall 141 facing the substrate 11.
Similarly, the height H2 of the encapsulation wall 16 refers to a distance between a first surface of the encapsulation wall 16 and a second surface of the encapsulation wall 16 in the first direction, where the first surface of the encapsulation wall 16 is a surface of the encapsulation wall 16 facing away from the substrate 11, and the second surface of the encapsulation wall 16 is a surface of the encapsulation wall 16 facing toward the substrate 11.
By making the height H1 of the first retaining wall 141 higher than the height H2 of the packaging retaining wall 16, the flow of the material is further slowed down in the inkjet printing process of the second packaging layer 122, and the material flows to the area where the frame area BB deviates from the display area AA farther only after exceeding the first retaining wall 141, so that the surface of the second packaging layer 122 between the first retaining wall 141 and the middle area AA1 of the display area is more close to the plane, the slope area of the second packaging layer 122 is expanded outwards to the side of the first retaining wall 141 far from the display area AA, so that the thickness difference of the color resistance layer 13 between the edge area AA2 of the display area and the middle area AA1 of the display area is reduced, the brightness difference between the edge area AA2 of the display area and the middle area AA1 of the display area is balanced, and the display effect of the display area AA is not affected by the first retaining wall 141 in the frame area BB, and finally the display performance of the display panel is improved.
Optionally, in another embodiment of the present invention, referring to fig. 6, fig. 6 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
The display panel comprises a plurality of pixels 151, and the pixels 151 are located in the display area AA.
The minimum distance L1 between the first retaining wall 141 and the pixel 151 is less than or equal to twice the dimension L2 of the pixel 151 in the same direction.
Note that the pixel 151 may be understood as a light emitting unit.
Specifically, in the direction parallel to the plane of the substrate 11, when the minimum distance L1 between the first retaining wall 141 and the pixel 151 is greater than twice the dimension L2 of the pixel 151 in the same direction, a significant slope still occurs on the surface of the second encapsulation layer 122 between the first retaining wall 141 and the middle area AA1 of the display area, so in this embodiment, by reasonably adjusting the distance between the first retaining wall 141 and the display area AA, the minimum distance L1 between the first retaining wall 141 and the pixel 151 is smaller than or equal to twice the dimension L2 of the pixel 151 in the same direction, that is, the distance L1 between the first retaining wall 141 and the nearest neighboring pixel 151 is smaller than or equal to twice the dimension L2 of the pixel 151 in the same direction, and in this case, the flatness of the surface of the second encapsulation layer 122 at the edge area AA2 of the display area can be further optimized, so as to reduce the difference between the thickness of the color resist layer 13 and the middle area AA1 of the display area AA2 in the inkjet printing process.
Optionally, the minimum distance between the first retaining wall 141 and the pixel 151 is less than or equal to 100um, for example, the minimum distance between the first retaining wall 141 and the pixel 151 is 86um or 64um or 32um, etc.
Optionally, in another embodiment of the present invention, referring to fig. 7, fig. 7 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention.
The adjusting retaining wall includes a second retaining wall 142, and the second retaining wall 142 is located on a side of the encapsulation layer 12 away from the substrate 11.
Alternatively, the second retaining wall 142 may contact with a color resistor located at the edge of the display area AA.
In this embodiment, the adjusting retaining wall (i.e. the second retaining wall 142) is located at a side of the encapsulation layer 12 away from the substrate 11, so that the flow of the color blocking material can be slowed down in the formation process of the color blocking layer 13, and further the thickness difference of the color blocking layer 13 in the display area edge area AA2 and the display area middle area AA1 is reduced, and further the brightness difference of the display area edge area AA2 and the display area middle area AA1 is balanced, so as to improve the display performance of the display panel.
Alternatively, in another embodiment of the present invention, the material of the second retaining wall 142 comprises an organic material.
Specifically, the second retaining wall 142 may be made of the same material and formed in the same process as the other film layers.
Alternatively, referring to fig. 8, fig. 8 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention, a fourth encapsulation layer 124 is formed on a side of the third encapsulation layer 123 facing away from the second encapsulation layer 122, where a material of the fourth encapsulation layer 124 is an organic material, and is formed by means of IJP (Ink Jet Printing) as with the second encapsulation layer 122, so that the fourth encapsulation layer 124 may be referred to as an IJP layer in the technical field of the present application, that is, the second encapsulation layer 122 may be referred to as a first IJP layer, and the fourth encapsulation layer may be referred to as a second IJP layer.
As shown in fig. 8, the slope area of the second encapsulation layer 122 is expanded outward toward the frame area BB by the fourth encapsulation layer 124, so that the surface of the fourth encapsulation layer 124 located at the display area edge area AA2 approaches to the plane infinitely, and the second retaining wall 142 is combined to reduce the thickness difference of the color resist layer 13 between the display area edge area AA2 and the display area middle area AA 1.
The second retaining wall 142 is made of the same material as the fourth packaging layer 124, and the fourth packaging layer 124 and the second retaining wall 142 are formed simultaneously in the same process.
Optionally, referring to fig. 9, fig. 9 is a schematic cross-sectional view of a display panel according to another embodiment of the present invention, an optical adhesive layer 17 (Optically Clear Adhesive, OCA for short) is formed on a side of the third encapsulation layer 123 facing away from the second encapsulation layer 122, and the surface of the display area edge area AA2 is planarized by the optical adhesive layer 17, so that the surface of the optical adhesive layer 17 located in the display area edge area AA2 is wirelessly close to a plane, and the second retaining wall 142 is combined to reduce the thickness difference of the color resist layer 13 in the display area edge area AA2 and the display area middle area AA 1.
The second retaining wall 142 is made of the same material as the optical adhesive layer 17, and the optical adhesive layer 17 and the second retaining wall 142 are formed simultaneously in the same process.
Alternatively, color resists with high viscosity, such as BM (Black Matrix), may be preferentially formed based on different viscosity color resist materials, and the second barrier wall 142 is formed simultaneously when the BM is formed, that is, the second barrier wall 142 and the BM are formed by using the same material and in the same process.
Since the second retaining wall 142 is made of the same material as the BM and has a larger viscosity, the flow of the subsequent color resist material can be prevented, so that the thickness difference of the color resist layer 13 between the display area edge area AA2 and the display area middle area AA1 is reduced, and the brightness difference between the display area edge area AA2 and the display area middle area AA1 is balanced, thereby improving the display performance of the display panel.
Optionally, in another embodiment of the present invention, referring to fig. 10, fig. 10 is a schematic cross-sectional view of a further display panel according to an embodiment of the present invention.
The second retaining wall 142 includes at least two laminations.
Specifically, the second barrier rib 142 may be a stacked structure of the fourth encapsulation layer 124 and the optical adhesive layer 17, a stacked structure of the fourth encapsulation layer 124 and the BM, a stacked structure of the optical adhesive layer 17 and the BM, a stacked structure of the fourth encapsulation layer 124, the optical adhesive layer 17 and the BM, or the like.
In fig. 10, only two stacks 142A and 142B are illustrated as an example.
In this embodiment, the number of the second retaining walls 142 is reasonably set, so that the second retaining walls 142 with different heights are realized, the flow of the color resist material can be effectively prevented in the formation process of the color resist layer 13, the thickness difference of the color resist layer 13 in the edge area AA2 of the display area and the middle area AA1 of the display area is further reduced, and the brightness difference of the edge area AA2 of the display area and the middle area AA1 of the display area is further balanced, so that the display performance of the display panel is improved.
Optionally, in another embodiment of the present invention, referring to fig. 11, fig. 11 is a schematic cross-sectional view of a further display panel according to an embodiment of the present invention.
The second retaining wall 142 includes a color blocking wall 18, and the material of the color blocking wall 18 includes the material of the color blocking layer. For example, one or more materials including Black Matrix (BM), red color resist, blue color resist, and green color resist.
The color blocking wall 18 includes at least two sub-color blocking wall parts that are stacked, the at least two sub-color blocking wall parts include a first sub-color blocking wall part 18A and a second sub-color blocking wall part 18B, the first sub-color blocking wall part 18A is located between the second sub-color blocking wall 18B and the encapsulation layer 12, and the viscosity of the first sub-color blocking wall part 18A is greater than that of the second sub-color blocking wall part 18B.
In this embodiment, the color blocking wall 18 in the second blocking wall 142 is formed by a color blocking material, that is, the color blocking wall 18 is formed simultaneously during the formation of the color blocking layer 13, for example, the first sub-color blocking wall 18A is formed simultaneously during the formation of the Black Matrix (BM), the second sub-color blocking wall 18B is formed simultaneously during the formation of the red color blocking layer, the first sub-color blocking wall 18A and the second sub-color blocking wall 18B form the color blocking wall 18. The first sub-color blocking wall portion 18A and the second sub-color blocking wall portion 18B may be formed simultaneously in the process of forming the red color resist or the blue color resist or the green color resist to form the color blocking wall portion 18.
The number of the laminated color blocking wall portions 18 is not limited, and only two sub-color blocking wall portions are used as an example in the embodiment of the present invention.
Further, the first sub-color blocking wall 18A is located between the second sub-color blocking wall 18B and the encapsulation layer 12, and the viscosity of the first sub-color blocking wall 18A is greater than that of the second sub-color blocking wall 18B, and since the viscosity of the first sub-color blocking wall 18A is greater than that of the second sub-color blocking wall 18B, the structural stability of the color blocking wall 18 itself can be ensured, and the first sub-color blocking wall 18A with greater viscosity can effectively block the flow of the subsequent color blocking material, and then the overall height of the color blocking wall 18 is adjusted by the second sub-color blocking wall 18B, so that the thickness difference of the color blocking layer 13 between the edge area AA2 of the display area and the middle area AA1 of the display area is reduced to the greatest extent from multiple aspects, and the brightness difference between the edge area AA2 of the display area and the middle area AA1 of the display area is balanced, so that the display performance of the display panel is improved.
Note that, the second retaining wall 142 may be a laminated structure of the fourth encapsulation layer 124 and the color blocking wall 18, a laminated structure of the optical adhesive layer 17 and the color blocking wall 18, a laminated structure of the fourth encapsulation layer 124, the optical adhesive layer 17 and the color blocking wall 18, or the like.
Alternatively, in another embodiment of the present invention, the surface of the second retaining wall 142 has hydrophobicity, or a hydrophobic material layer may be disposed on the surface of the second retaining wall 142 to make the surface of the second retaining wall 142 hydrophobic.
Specifically, the blocking effect on the flow of the color blocking material can be improved by making the surface of the second blocking wall 142 hydrophobic in the embodiment of the present application.
Optionally, in another embodiment of the present invention, referring to fig. 12, fig. 12 is a schematic cross-sectional view of yet another display panel provided in an embodiment of the present invention, where the display panel includes a plurality of pixels 151, and the pixels 151 are located in the display area AA.
The minimum distance L3 between the second retaining wall 142 and the pixel 151 is smaller than or equal to the dimension L2 of the pixel 151 in the same direction.
Note that the pixel 151 may be understood as a light emitting unit.
Specifically, in the direction parallel to the plane of the substrate 11, when the minimum distance L3 between the second retaining wall 142 and the pixel 151 is greater than the dimension L2 in the same direction of the pixel 151, a significant slope still occurs on the surface of the second packaging layer 122 between the second retaining wall 142 and the middle area AA1 of the display area, so in this embodiment, by reasonably adjusting the distance between the second retaining wall 142 and the display area AA, the minimum distance L3 between the second retaining wall 142 and the pixel 151 is smaller than or equal to the dimension L2 in the same direction of the pixel 151, that is, the distance L3 between the second retaining wall 142 and the nearest neighboring pixel 151 is smaller than or equal to the dimension L2 in the same direction of the pixel 151, so that the thickness difference of the color resist layer 13 between the edge area AA2 of the display area and the middle area AA1 of the display area can be reduced.
Optionally, a minimum distance L3 between the second retaining wall 142 and the pixel 151 is less than or equal to 50um, for example, the minimum distance L3 between the second retaining wall 142 and the pixel 151 is 35um or 22um or 16um, etc.
Optionally, in another embodiment of the present invention, referring to fig. 13, fig. 13 is a schematic cross-sectional view of a further display panel according to an embodiment of the present invention.
The adjusting retaining wall includes a first retaining wall 141 and a second retaining wall 142, the first retaining wall 141 is located between the substrate 11 and the encapsulation layer 12, the second encapsulation layer 122 covers the first retaining wall 141, and the second retaining wall 142 is located at a side of the encapsulation layer 12 away from the substrate 11.
Specifically, the first retaining wall 141 can slow down the flow of the organic material in the inkjet printing process of the second packaging layer 122, and expand the slope area of the second packaging layer 122 towards the frame area BB, so that the surface of the second packaging layer 122 located in the display area edge area AA2 approaches to the plane infinitely, and the thickness difference of the second packaging layer 122 on the display area edge area AA2 is reduced, so that the thickness difference of the color resistance layer 13 in the display area edge area AA2 and the display area middle area AA1 is reduced; meanwhile, the second retaining wall 142 can slow down the flow of the color resistance material in the formation process of the color resistance layer 13, so that the thickness difference of the color resistance layer 13 in the edge area AA2 of the display area and the middle area AA1 of the display area is reduced, the thickness difference of the color resistance layer 13 in the edge area AA2 of the display area and the middle area AA1 of the display area is reduced to the greatest extent, the brightness difference of the edge area AA2 of the display area and the middle area AA1 of the display area is balanced, the display effect of the display area AA is not influenced even if the adjusting retaining wall is positioned in the frame area BB, and the display performance of the display panel is improved finally.
It should be noted that, the first retaining wall 141 in the embodiment of the present invention may include all the features of the first retaining wall 141 in the above embodiment, and the second retaining wall 142 in the embodiment of the present invention may include all the features of the second retaining wall 142 in the above embodiment.
Optionally, in another embodiment of the present invention, referring to fig. 14, fig. 14 is a schematic top view of another display panel according to an embodiment of the present invention.
The adjusting retaining wall surrounds the display area.
Specifically, the first retaining walls 141 or the second retaining walls 142 encircle the display area AA, and it should be noted that referring to fig. 15, fig. 15 is a schematic top view of another display panel provided in the embodiment of the invention, the number of the first retaining walls 141 or the number of the second retaining walls 142 may be two, that is, two first retaining walls 141 encircle the display area AA, and a space exists between two first retaining walls 141; or two second retaining walls 142 surround the display area AA, and a space exists between the two second retaining walls 142.
Optionally, in another embodiment of the present invention, referring to fig. 16, fig. 16 is a schematic cross-sectional view of a further display panel according to an embodiment of the present invention.
The flatness adjustment part 14 includes a planarization layer 143, and the planarization layer 143 is located between the encapsulation layer 12 and the color resist layer 13.
In the display area edge area AA2, the thickness of the planarization layer 143 gradually increases in a direction from the display area AA toward the frame area BB.
Specifically, as shown in fig. 16, by disposing the planarization layer 143 between the encapsulation layer 12 and the color resist layer 13 to planarize the slope region of the encapsulation layer in the display area edge region AA2, the surface of the planarization layer 143 on the side facing away from the substrate 11 is ensured to be parallel to the plane of the substrate 11, so as to balance the thickness difference of the color resist layer 13 in the display area edge region AA2 and the display area middle region AA1, and further balance the brightness difference in the display area edge region AA2 and the display area middle region AA 1.
The planarization layer 143 includes, but is not limited to, an optical adhesive layer (Optically Clear Adhesive, abbreviated as OCA), including, but not limited to, controlling the thickness of the optical adhesive layer by controlling the exposure.
Optionally, in another embodiment of the present invention, referring to fig. 17, fig. 17 is a schematic cross-sectional view of a further display panel according to an embodiment of the present invention.
The flatness adjustment assembly 14 includes a filling layer 144, and the filling layer 144 is located between the encapsulation layer 12 and the color resist layer 13 and is located in the border area BB and the display area edge area AA2.
The thickness of the filling layer 144 gradually increases in a direction from the display area AA to the frame area BB.
Specifically, as shown in fig. 17, a filling layer 144 is formed on a side of the third packaging layer 123 away from the second packaging layer 122, and a surface of the filling layer 144 located on a side of the display area edge area AA2 away from the substrate 11 is parallel to a plane on which the substrate 11 is located, so as to balance the thickness difference of the color blocking layer 13 between the display area edge area AA2 and the display area middle area AA1, and further balance the brightness difference between the display area edge area AA2 and the display area middle area AA 1.
It should be noted that, the surface of the filling layer 144 located at the edge area AA2 of the display area facing away from the substrate 11 is on the same level with the surface of the third encapsulation layer 123 located at the middle area AA1 of the display area facing away from the substrate 11.
Optionally, in another embodiment of the present invention, referring to fig. 18, fig. 18 is a schematic top view of a display panel according to another embodiment of the present invention.
The display panel further comprises an opening area CC, wherein the opening area CC is positioned in the display area AA and is used for placing devices such as a camera.
Specifically, the scheme of any one or a combination of the embodiments of the present invention is adopted to compensate the color resistance thickness at the junction of the opening area CC and the display area AA, so as to further improve the display effect of each area of the display panel.
In the above embodiment, the light emitting region 15 includes a plurality of light emitting units, and the light emitting units may include organic light emitting diodes (Organic Ligh Emitting Diode, OLED), light emitting diodes (Ligh Emitting Diode, LED), and the like.
In the above embodiment, the display panel may further include a driving circuit layer between the substrate 11 and the light emitting region 15, and the driving circuit layer may include a plurality of thin film transistors, which may be used to constitute pixel circuits that drive the light emitting units to emit light.
Optionally, in another embodiment of the present invention, referring to fig. 19, fig. 19 is a schematic structural diagram of a display device according to an embodiment of the present invention.
The display device 100 includes the display panel described in the above embodiments.
Specifically, the display device 100 includes, but is not limited to, electronic devices such as a tablet and a mobile phone, and has the same features as the display panel provided in the above embodiment of the present invention.
The display panel and the display device provided by the invention are described in detail, and specific examples are applied to illustrate the principle and the implementation of the invention, and the description of the above examples is only used for helping to understand the method and the core idea of the invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
It is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include, or is intended to include, elements inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A display panel, the display panel comprising a display area and a bezel area surrounding the display area, the display panel comprising:
a substrate;
the packaging layer is positioned on one side of the substrate;
the color resistance layer is positioned on one side of the packaging layer away from the substrate;
and the planarization layer is positioned between the packaging layer and the color resistance layer and is used for providing a flat surface for the color resistance layer.
2. The display panel of claim 1, wherein the display panel comprises,
the surface of one side of the planarization layer facing away from the substrate is parallel to the plane of the substrate.
3. The display panel of claim 1, wherein the display panel comprises,
in the edge area of the display area, the thickness of the planarization layer gradually increases along the direction from the display area to the frame area.
4. The display panel of claim 1, wherein the display panel comprises,
the planarization layer includes an optical cement layer.
5. The display panel of claim 1, wherein the display panel comprises,
the planarization layer extends from the display region to the frame region where the planarization layer includes a portion not covered by the color resist layer.
6. The display panel of claim 1, wherein the display panel comprises,
the color resistance layer is in contact with the planarization layer.
7. The display panel of claim 1, wherein the display panel comprises,
the thickness of the color resistance layer in the edge area of the display area is the same as that in the middle area of the display area.
8. The display panel according to claim 1, wherein the encapsulation layer includes a first encapsulation layer, a second encapsulation layer, and a third encapsulation layer stacked in a first direction, the first direction being perpendicular to and directed from the substrate to the encapsulation layer;
the display panel further comprises a packaging retaining wall, wherein the packaging retaining wall is located in the frame area and used for blocking the second packaging layer.
9. A display device comprising the display panel according to any one of claims 1-8.
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| CN202311352664.XA CN117396022A (en) | 2021-12-29 | 2021-12-29 | Display panel and display device |
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| CN202111639889.4A CN114284456B (en) | 2021-12-29 | 2021-12-29 | Display panel and display device |
| CN202311352664.XA CN117396022A (en) | 2021-12-29 | 2021-12-29 | Display panel and display device |
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| CN115734679A (en) * | 2017-11-30 | 2023-03-03 | 京东方科技集团股份有限公司 | OLED display panel, preparation method thereof and OLED display device |
| KR102524043B1 (en) * | 2018-02-12 | 2023-04-20 | 삼성디스플레이 주식회사 | Display device and manufacturing method thereof |
| CN108682751B (en) * | 2018-05-17 | 2020-07-03 | 武汉华星光电半导体显示技术有限公司 | OLED display panel, manufacturing method thereof and OLED display device |
| CN108878687B (en) * | 2018-06-29 | 2020-03-10 | 上海天马微电子有限公司 | Display panel and electronic equipment |
| CN109037289B (en) * | 2018-08-01 | 2021-02-19 | 京东方科技集团股份有限公司 | Display substrate, preparation method thereof and display panel |
| CN208904069U (en) * | 2018-11-07 | 2019-05-24 | 京东方科技集团股份有限公司 | A kind of display base plate and display device |
| CN109671867B (en) * | 2019-01-23 | 2020-07-17 | 京东方科技集团股份有限公司 | Packaging method and packaging structure of display substrate |
| CN110148617A (en) * | 2019-05-30 | 2019-08-20 | 京东方科技集团股份有限公司 | The production method and display device of oled panel, oled panel |
| CN110600631A (en) * | 2019-08-28 | 2019-12-20 | 武汉华星光电半导体显示技术有限公司 | Display panel and display device |
| KR20210066373A (en) * | 2019-11-28 | 2021-06-07 | 엘지디스플레이 주식회사 | Touch display device |
| KR20210072198A (en) * | 2019-12-06 | 2021-06-17 | 삼성디스플레이 주식회사 | Display apparatus |
| CN112018159B (en) * | 2020-08-27 | 2023-06-02 | 京东方科技集团股份有限公司 | Touch display panel |
| CN112289842B (en) * | 2020-10-30 | 2022-05-13 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN112909202B (en) * | 2021-01-25 | 2022-12-09 | 绵阳京东方光电科技有限公司 | Display panel, preparation method thereof and display device |
| CN113299849A (en) * | 2021-05-08 | 2021-08-24 | 武汉华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
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