CN114613921B - Display panel and mobile terminal - Google Patents
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- CN114613921B CN114613921B CN202210194532.8A CN202210194532A CN114613921B CN 114613921 B CN114613921 B CN 114613921B CN 202210194532 A CN202210194532 A CN 202210194532A CN 114613921 B CN114613921 B CN 114613921B
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- 239000012044 organic layer Substances 0.000 claims abstract description 100
- 239000010410 layer Substances 0.000 claims abstract description 95
- 239000000463 material Substances 0.000 claims abstract description 68
- 239000002346 layers by function Substances 0.000 claims abstract description 18
- 238000004806 packaging method and process Methods 0.000 claims abstract description 18
- 230000004888 barrier function Effects 0.000 claims description 13
- 229920002120 photoresistant polymer Polymers 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract description 33
- 230000000694 effects Effects 0.000 abstract description 19
- 229920000642 polymer Polymers 0.000 description 22
- 239000000758 substrate Substances 0.000 description 12
- 239000010408 film Substances 0.000 description 9
- 239000011368 organic material Substances 0.000 description 8
- 239000010409 thin film Substances 0.000 description 7
- 238000007641 inkjet printing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000004642 Polyimide Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012536 packaging technology Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 229910017107 AlOx Inorganic materials 0.000 description 2
- 229910004012 SiCx Inorganic materials 0.000 description 2
- 229910020286 SiOxNy Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- OFIYHXOOOISSDN-UHFFFAOYSA-N tellanylidenegallium Chemical compound [Te]=[Ga] OFIYHXOOOISSDN-UHFFFAOYSA-N 0.000 description 2
- 238000000427 thin-film deposition Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
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Classifications
-
- 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
- H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The embodiment of the application provides a display panel and a mobile terminal; the display panel comprises a light-emitting functional layer, a packaging layer and a retaining wall, wherein the packaging layer comprises a first inorganic layer and an organic layer arranged on the first inorganic layer, the retaining wall is of an annular structure and is arranged around the edge of the organic layer, a plurality of grooves which are arranged at intervals are further arranged on one side of the retaining wall, facing the organic layer, of the retaining wall, and the grooves do not penetrate through the retaining wall; above-mentioned display panel is the barricade of annular structure through the edge at the organic layer around the one deck, and the barricade still is provided with the recess that a plurality of intervals set up towards one side of organic layer, and the recess does not run through the barricade, and the recess can play the effect of drainage to the organic ink material that forms the organic layer, can improve the edge and the corner position department organic ink material of barricade and fill incomplete phenomenon, improves the phenomenon that organic ink material overflowed the barricade simultaneously to reduce the uneven problem of edge thickness of organic layer, and then effectively promoted display panel's encapsulation effect.
Description
Technical Field
The application relates to the field of display, in particular to a display panel and a mobile terminal.
Background
Organic LIGHT EMITTING Diode (OLED) has the characteristics of high flexibility, quick response time, wide color gamut, low energy consumption and the like, and is greatly concerned and developed. An OLED is composed of an anode, a cathode, and one or more layers of organic materials between the electrodes, and excitons are formed by recombination of holes and electrons injected from the anode and the cathode in an organic light emitting layer, and the excitons radiate to transition to emit light. However, the metal cathode and the organic material in the OLED are easily affected by water vapor and oxygen, so that the efficiency of the OLED is reduced and the OLED is invalid, and the service life of the OLED is affected. Therefore, the OLED has high requirements on the isolation of water and oxygen, and the encapsulation effect of the OLED greatly influences the performance and the service life of the OLED.
At present, the packaging of the OLED mainly adopts a film packaging technology, and a plurality of layers of inorganic/organic films are deposited on the OLED device alternately, so that the purpose of isolating water and oxygen is achieved. The organic film in the film packaging technology is mainly a resin polymer film, the resin polymer solution is sprayed on the packaging area mainly in an ink-jet printing mode, the solution in the packaging area is leveled after a period of time, and finally the film is solidified in a UV or baking mode, so that a continuous film is formed in the area needing to be packaged. However, when the polymer solution is leveled on the surface of the encapsulation area, the thickness of the polymer solution may be uneven at the edges or corners of the encapsulation area, thereby affecting the overall encapsulation performance, and thus the performance and the service life of the OLED.
Therefore, a display panel and a mobile terminal are needed to solve the above-mentioned problems.
Disclosure of Invention
The embodiment of the application provides a display panel and a mobile terminal, which can solve the technical problem that the thickness of an organic layer in a packaging layer of the current display panel is uneven at the edge or corner position of a packaging area.
The embodiment of the application provides a display panel, which comprises a light-emitting functional layer, an encapsulation layer and a retaining wall, wherein the encapsulation layer is arranged on the light-emitting functional layer, the encapsulation layer comprises a first inorganic layer and an organic layer arranged on the first inorganic layer, and the retaining wall is of an annular structure and is arranged around the edge of the organic layer;
the retaining wall is characterized in that a plurality of grooves which are arranged at intervals are further formed in one side, facing the organic layer, of the retaining wall, and the grooves do not penetrate through the retaining wall.
Alternatively, in some embodiments of the present application, the retaining wall has a plurality of corners, and each corner position of the retaining wall is provided with the groove toward one side of the organic layer.
Optionally, in some embodiments of the present application, a portion of the retaining wall between two adjacent corners is provided with a plurality of grooves disposed at intervals on a side facing the organic layer.
Optionally, in some embodiments of the present application, the retaining wall includes a first sub-retaining wall or a second sub-retaining wall disposed between two adjacent corners, and a length of the first sub-retaining wall is greater than a length of the second sub-retaining wall;
The first retaining wall is provided with a plurality of first sub-grooves, the second retaining wall is provided with a plurality of second sub-grooves, and the distance between every two adjacent first sub-grooves is larger than the distance between every two adjacent second sub-grooves.
Optionally, in some embodiments of the present application, a depth of the groove corresponding to each of the corner positions is greater than a depth of the first sub-groove or the second sub-groove.
Alternatively, in some embodiments of the application, the depth of the recess increases from a side distal to the organic layer to a side proximal to the organic layer.
Optionally, in some embodiments of the present application, the retaining wall is provided with a plurality of grooves along the height direction of the retaining wall, and the spacing between two adjacent grooves is equal.
Optionally, in some embodiments of the application, the display panel further includes a second inorganic layer disposed on the organic layer;
and in the top view direction of the display panel, the orthographic projection of the retaining wall on the display panel is positioned in the second inorganic layer.
Optionally, in some embodiments of the present application, the material of the retaining wall is an organic photoresist material, and the opening size of the groove ranges from 1 μm to 20 μm.
Correspondingly, the embodiment of the application also provides a mobile terminal, which comprises a terminal main body and the display panel according to any one of the above, wherein the terminal main body and the spliced display panel are combined into a whole.
The embodiment of the application provides a display panel and a mobile terminal; the display panel comprises a light-emitting functional layer, a packaging layer and a retaining wall, wherein the packaging layer is arranged on the light-emitting functional layer, the packaging layer comprises a first inorganic layer and an organic layer arranged on the first inorganic layer, the retaining wall is of an annular structure and is arranged around the edge of the organic layer, a plurality of grooves which are arranged at intervals are further arranged on one side, facing the organic layer, of the retaining wall, and the grooves do not penetrate through the retaining wall; above-mentioned display panel is through the edge of organic layer is the annular structure around the one deck barricade, just the barricade orientation one side of organic layer still is provided with the recess that a plurality of intervals set up, the recess does not run through the barricade, the recess can be to forming the effect of drainage is played to the organic ink material of organic layer, can improve the incomplete phenomenon of organic ink material filling in edge and the corner position department of barricade, improve simultaneously organic ink material overflows the phenomenon of barricade, thereby solve the uneven problem of edge thickness of organic layer, and then effectively promoted display panel's encapsulation effect.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a partial cross-sectional structure of a display panel according to an embodiment of the present application;
Fig. 2 is a schematic view of a first planar structure of a retaining wall in a display panel according to an embodiment of the present application;
fig. 3 is a schematic view of a second planar structure of a retaining wall in a display panel according to an embodiment of the present application;
Fig. 4 is a schematic view of a third planar structure of a retaining wall in a display panel according to an embodiment of the application.
Detailed Description
The following description of the embodiments of the present application 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 application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
The embodiment of the application aims at the technical problem that the current display panel is difficult to realize low-cost detection of ambient light, and can improve the technical problem.
The technical scheme of the present application will now be described with reference to specific embodiments.
Referring to fig. 1 to 4, an embodiment of the present application provides a display panel 100, which includes a light emitting functional layer 20, an encapsulation layer 30 disposed on the light emitting functional layer 20, and a retaining wall 40, wherein the encapsulation layer 30 includes a first inorganic layer 31 and an organic layer 32 disposed on the first inorganic layer 31, and the retaining wall 40 has a ring structure and is disposed around an edge of the organic layer 32;
the side of the retaining wall 40 facing the organic layer 32 is further provided with a plurality of grooves 401 disposed at intervals, and the grooves 401 do not penetrate through the retaining wall 40.
Above-mentioned display panel 100 is through the edge of organic layer 32 is around the one deck is annular structure the barricade 40, just barricade 40 is towards one side of organic layer 32 still is provided with a plurality of interval sets of recess 401, recess 401 does not run through barricade 40, recess 401 can be to forming organic ink material of organic layer 32 plays the effect of drainage, can improve the edge and the corner position department of barricade 40 organic ink material fills incomplete phenomenon, improves simultaneously organic ink material overflows the phenomenon of barricade 40, thereby solves the problem of the uneven edge thickness of organic layer 32, and then has effectively promoted display panel 100's encapsulation effect.
The technical scheme of the present application will now be described with reference to specific embodiments.
Example 1
As shown in fig. 1, fig. 1 is a schematic view of a partial cross-sectional structure of a display panel 100 according to an embodiment of the application; the display panel 100 includes a substrate 10, a light emitting function layer 20 disposed on the substrate 10, and a packaging layer 30 disposed on the substrate 10 and covering the light emitting function layer 20. The encapsulation layer 30 includes a first inorganic layer 31 disposed on the substrate 10 and covering the light emitting function layer 20, an organic layer 32 disposed on the first inorganic layer 31, and a second inorganic layer 33 disposed on the first organic layer 32 and covering the organic layer 32;
the display panel 100 further includes a retaining wall 40, where the retaining wall 40 has a ring structure and is disposed around an edge of the organic layer 32.
In an embodiment of the present application, the substrate 10 may be a flexible substrate or a rigid substrate. Specifically, the flexible substrate may be made of a plastic material such as Polyimide (PI). It will be appreciated that the substrate 10 may also be a rigid substrate such as glass to provide a display panel 100 that cannot be curled.
In the embodiment of the present application, the light emitting function layer 20 is formed on the substrate 10, and light emission of the display panel 100 is achieved through the light emitting function layer 20. The light emitting functional layer 20 is formed by stacking a plurality of layers. Specifically, the light emitting functional layer 20 includes a plurality of thin film transistors arranged in an array, a planarization layer formed on the thin film transistors, an anode layer stacked on the planarization layer and electrically connected to the thin film transistors through vias, and a pixel defining layer stacked on the anode layer, where the pixel defining layer includes a plurality of pixel regions arranged in an array at intervals, and a light emitting material is deposited in each pixel region. The pixel defining layer is further formed with a cathode layer, so that the pixel region emits light with different brightness by means of current change between the anode layer and the cathode layer, so as to realize picture display of the display panel 100.
Further, the thin film transistor may be a top gate thin film transistor or a bottom gate thin film transistor.
In the embodiment of the present application, the retaining wall 40 is disposed around the edge of the organic layer 32, and the second inorganic layer 33 covers the organic layer 32 and the retaining wall 40, so as to prevent intrusion of water and oxygen, and achieve a good packaging effect.
Specifically, the specific forming manner of each layer of the encapsulation layer 30 is as follows: the first inorganic layer 31 of the encapsulation layer 30 is deposited on the light emitting function layer 20 through any one process of monoatomic layer deposition (ALD), pulsed laser thin film deposition (PLD), sputtering (Sputter), plasma Enhanced Chemical Vapor Deposition (PECVD), etc., and the material of the first inorganic layer 31 includes, but is not limited to, siN x、SiOxNy、SiOx、SiCxNy、ZnO、AlOx. Wherein the first inorganic layer 31 covers the display area of the display panel 100, and the outer boundary thereof does not exceed the barrier wall 40. Preferably, the thickness of the first inorganic layer 31 is between 50nm and 2 μm.
Thereafter, the organic layer 32 in the encapsulation layer 30 is deposited on the first inorganic layer 31 by means of inkjet printing (IJP), and the material of the organic layer 32 includes, but is not limited to, a polymer material, typically an epoxy resin, or a material of the sub-gram force system, etc. Wherein the organic layer 32 can cover the light emitting function layer 20, and the outer boundary of the organic layer 32 does not exceed the barrier wall 40. Preferably, the thickness of the organic layer 32 is between 1 μm and 20 μm. The organic layer 32 is formed by curing the polymer liquid material by ultraviolet light or thermal baking.
Finally, the second inorganic layer 33 is deposited on the organic layer 32 by any one of a monoatomic layer deposition (ALD), a pulsed laser thin film deposition (PLD), a sputtering (Sputter), a Plasma Enhanced Chemical Vapor Deposition (PECVD), etc., and the material of the second inorganic layer 33 includes, but is not limited to, siN x、SiOxNy、SiOx、SiCxNy、ZnO、AlOx, etc. The second inorganic layer 33 may be the same or different from the first inorganic layer 31, and the outer boundary of the second inorganic layer 33 exceeds the retaining wall 40. Wherein, in the top view direction of the display panel 100, the front projection of the retaining wall 40 on the substrate 10 is located in the second inorganic layer 33. Preferably, the thickness of the first inorganic layer 31 is between 50nm and 2 μm.
Fig. 2 is a schematic view showing a first planar structure of a retaining wall 40 in a display panel 100 according to an embodiment of the application; the side of the retaining wall 40 facing the organic layer 32 is further provided with a plurality of grooves 401 disposed at intervals, and the grooves 401 do not penetrate through the retaining wall 40.
In the embodiment of the present application, the retaining wall 40 has a plurality of corners (4 in the embodiment of the present application), and the recess 401 is provided at each corner position of the retaining wall 40 toward one side of the organic layer 32. The grooves 401 are disposed at each corner position of the retaining wall 40, and the grooves 401 are in a ring structure and are disposed around the edges of the organic layer 32, so that the micro-openings of the grooves 401 have drainage effect on the polymer organic ink material forming the organic layer 32, and the incomplete filling condition of the polymer organic ink material at the corner position can be improved; meanwhile, since the recess 401 is added to the retaining wall 40, the risk of overflow of the polymeric organic ink material by the retaining wall 40 is reduced, and the process boundary corresponding to the inkjet printing is also increased.
Further, the depth of the groove 401 increases from the side away from the organic layer 32 to the side closer to the organic layer 32. By the arrangement, the flow rate of the polymer organic ink material flowing to the bottom of the groove 401 along the opening of the groove 401 can be slowed down, the condition that the polymer organic ink material is not completely filled at the corner position can be further improved, and the risk that the polymer organic ink material overflows from the corner position is further reduced.
Further, the retaining wall 40 is provided with a plurality of grooves 401 along the height direction of the retaining wall 40, and the spacing between two adjacent grooves 401 is equal. That is, in the embodiment of the present application, a plurality of the grooves 401 are provided at each corner position of the retaining wall 40 toward the side of the organic layer 32. In the above arrangement, the retaining wall 40 is provided with the plurality of grooves 401 corresponding to the same corner position, and the spaces between two adjacent grooves 401 are equal, so that the flow channel of the polymer organic ink material forming the organic layer 32 is prolonged, the condition that the filling of the polymer organic ink material at the corner position is incomplete can be further improved, and the risk that the polymer organic ink material overflows from the corner position is further reduced.
In the embodiment of the present application, the bottom of the groove 401 may be a plane or an arc. When the bottom of the groove 401 is a cambered surface, the flow rate of the polymer organic ink material flowing to the bottom of the groove 401 can be further slowed down, the condition that the polymer organic ink material is not completely filled at the corner position can be further improved, and the risk that the polymer organic ink material overflows from the corner position is further reduced.
In an embodiment of the present application, the material of the retaining wall 40 may include, but is not limited to, acrylic, epoxy, polyimide, silicone, organic photoresist, and the like. Further, the height of the retaining wall 40 ranges from 2 μm to 20 μm, and the width of the retaining wall 40 ranges from 30 μm to 100 μm. If the height of the barrier wall 40 is less than 2 μm, the risk of the polymer organic ink material overflowing from the barrier wall 40 is easily caused, and if the height of the barrier wall 40 is greater than 20 μm, the film thickness of the second inorganic layer 33 is increased, thereby increasing the manufacturing cost of the encapsulation layer 30; if the width of the barrier rib 40 is smaller than 30 μm, the pressure of the polymer organic ink material contacting the barrier rib 40 is increased, so as to increase the surface tension of the polymer organic ink material, and further increase the uneven thickness of the edges and the middle of the organic layer 32, and if the width of the barrier rib 40 is larger than 100 μm, the coverage area of the second inorganic layer 33 is increased, and further increase the manufacturing cost of the encapsulation layer 30.
In the embodiment of the present application, the opening size of the recess 401 ranges from 1 μm to 20 μm. If the opening of the groove 401 is smaller than 1 μm, the capillary force generated by the groove 401 accelerates the flow rate of the polymer organic ink material flowing to the groove 401, so as to increase the risk of overflowing the polymer organic ink material from the corner; if the opening of the groove 401 is larger than 20 μm, the groove 401 cannot provide a blocking effect on the polymer organic ink material, and thus cannot slow down the flow rate of the polymer organic ink material.
Aiming at the technical problem that the current display panel 100 is difficult to realize low-cost detection of ambient light, the embodiment of the application provides the display panel 100; the display panel 100 comprises a light emitting functional layer 20, an encapsulation layer 30 and a retaining wall 40, wherein the encapsulation layer 30 is arranged on the light emitting functional layer 20, the encapsulation layer 30 comprises a first inorganic layer 31 and an organic layer 32 arranged on the first inorganic layer 31, the retaining wall 40 is in a ring-shaped structure and is arranged around the edge of the organic layer 32, a plurality of grooves 401 which are arranged at intervals are further arranged at each corner position of the retaining wall 40 towards one side of the organic layer 32, and the grooves 401 do not penetrate through the retaining wall 40; the above display panel 100 further comprises a plurality of grooves 401 arranged at intervals on one side of the retaining wall 40, wherein each corner position of the retaining wall 40 faces the organic layer 32, by surrounding one layer of the retaining wall 40 at the edge of the organic layer 32, the grooves 401 do not penetrate through the retaining wall 40, the grooves 401 can drain the organic ink material forming the organic layer 32, the phenomenon of incomplete filling of the organic ink material at each corner position of the retaining wall 40 can be improved, and meanwhile, the phenomenon of overflowing of the organic ink material from the retaining wall 40 is improved, so that the problem of uneven thickness of the edge of the organic layer 32 is solved, and the packaging effect of the display panel 100 is effectively improved.
Example two
As shown in fig. 3, a second plane structure of the retaining wall 40 in the display panel 100 according to the embodiment of the application is shown; the structure of the retaining wall 40 in the display panel 100 in the second embodiment of the present application is the same as or similar to the structure of the retaining wall 40 in the display panel 100 in the first embodiment of the present application, and only the difference is that a portion of the retaining wall 40 between two adjacent corners is provided with a plurality of grooves 401 disposed at intervals on a side of the retaining wall 40 facing the organic layer 32, and the positions of the retaining wall 40 corresponding to the corners are not provided with the grooves 401.
Further, the retaining wall 40 includes a first sub-retaining wall 41 or a second sub-retaining wall 42 disposed between two adjacent corners, and the length of the first sub-retaining wall 41 is greater than the length of the second sub-retaining wall 42;
The first retaining wall 41 is provided with a plurality of first sub-grooves 411, the second retaining wall 42 is provided with a plurality of second sub-grooves 421, and a distance between two adjacent first sub-grooves 411 is greater than a distance between two adjacent second sub-grooves 421. The reason for this is that the edge area of the first retaining wall 41 is larger than the edge area of the second retaining wall 42, so that the surface tension of the liquid of the organic ink material in the edge area of the first retaining wall 40 is smaller than the surface tension of the liquid of the organic ink material in the edge area of the second retaining wall 40, and the flow velocity of the organic ink material in the edge area of the first retaining wall 40 is smaller than the flow velocity of the organic ink material in the edge area of the second retaining wall 40. Therefore, the arrangement density of the second sub-grooves 421 on the second sub-barrier wall 42 is greater than the arrangement density of the first sub-grooves 411 on the first sub-barrier wall 41, so that the flow rate of the organic ink material in the edge area where the first barrier wall 40 is located is the same as the flow rate of the organic ink material in the edge area where the second barrier wall 40 is located, thereby solving the problem of uneven edge thickness of the organic layer 32 and further effectively improving the packaging effect of the display panel 100.
Compared with the first embodiment of the present application, in the second embodiment of the present application, the retaining wall 40 is disposed at the edge of the organic layer 32, and the retaining wall 40 has a ring structure; the edge area (frame position) of the retaining wall 40 is provided with a plurality of grooves 401, so that the organic layer 32 can be uniformly spread by utilizing capillary effect, so that the film thickness of the organic layer 32 in the edge area is uniform, the grooves 401 can play a role in draining the organic ink material forming the organic layer 32, the phenomenon that the organic ink material is incompletely filled in the peripheral edge position of the retaining wall 40 can be improved, and meanwhile, the phenomenon that the organic ink material overflows the retaining wall 40 is improved, thereby solving the problem of uneven edge thickness of the organic layer 32, and further effectively improving the encapsulation effect of the display panel 100.
Aiming at the technical problem that the current display panel 100 is difficult to realize low-cost detection of ambient light, the embodiment of the application provides the display panel 100; the display panel 100 comprises a light emitting functional layer 20, an encapsulation layer 30 and a retaining wall 40, wherein the encapsulation layer 30 is arranged on the light emitting functional layer 20, the encapsulation layer 30 comprises a first inorganic layer 31 and an organic layer 32 arranged on the first inorganic layer 31, the retaining wall 40 is in a ring-shaped structure and is arranged around the edge of the organic layer 32, a plurality of grooves 401 which are arranged at intervals are also arranged at one side of the edge area (frame position) of the retaining wall 40, which faces the organic layer 32, and the grooves 401 do not penetrate through the retaining wall 40; the above display panel 100 further comprises a plurality of grooves 401 arranged at intervals at each corner of the retaining wall 40, wherein the edges of the organic layer 32 surround the retaining wall 40 with a ring-shaped structure, the grooves 401 do not penetrate through the retaining wall 40, the grooves 401 can drain the organic ink material forming the organic layer 32, the phenomenon of incomplete filling of the organic ink material at the edge area of the retaining wall 40 can be improved, and meanwhile, the phenomenon of overflowing of the organic ink material out of the retaining wall 40 is improved, so that the problem of uneven edge thickness of the organic layer 32 is solved, and the packaging effect of the display panel 100 is effectively improved.
Example III
Fig. 4 is a schematic view showing a third planar structure of the retaining wall 40 in the display panel 100 according to the embodiment of the application; the structure of the retaining wall 40 in the display panel 100 according to the third embodiment of the present application is the same as or similar to the structure of the retaining wall 40 in the display panel 100 according to the first embodiment of the present application, and only the difference is that a portion of the retaining wall 40 between two adjacent corners is provided with a plurality of grooves 401 disposed at intervals on a side of the retaining wall 40 facing the organic layer 32, and the positions of the retaining wall 40 corresponding to the corners are also provided with the grooves 401.
Specifically, a portion of the retaining wall 40 between two adjacent corners is provided with a plurality of the grooves 401 disposed at intervals on a side facing the organic layer 32, and the positions of the retaining wall 40 corresponding to the corners are not provided with the grooves 401.
Further, the retaining wall 40 includes a first sub-retaining wall 41 or a second sub-retaining wall 42 disposed between two adjacent corners, and the length of the first sub-retaining wall 41 is greater than the length of the second sub-retaining wall 42;
The first retaining wall 41 is provided with a plurality of first sub-grooves 411, the second retaining wall 42 is provided with a plurality of second sub-grooves 421, and a distance between two adjacent first sub-grooves 411 is greater than a distance between two adjacent second sub-grooves 421.
Further, the depth of the groove 401 corresponding to each corner position is greater than the depth of the first sub-groove 411 or the second sub-groove 421. This is because the area of the edge region of the bank 40 is much larger than the area of the corner region of the bank 40, resulting in the liquid surface tension of the organic ink material of the bank 40 at the edge region being smaller than the liquid surface tension of the organic ink material of the bank 40 at the corner position, so that the flow rate of the organic ink material of the bank 40 at the edge region is smaller than the flow rate of the organic ink material of the bank 40 at the corner region. Therefore, the depth of the groove 401 corresponding to each corner position is greater than the depth of the first sub-groove 411 or the second sub-groove 421, so that the degree of slowing down the flow rate of the organic ink material at each corner position is greater than the degree of slowing down the flow rate of the organic ink material at the edge region, so that the flow rate of the organic ink material at the edge region of the retaining wall 40 is the same as the flow rate of the organic ink material at the corner position of the retaining wall 40, the problem of uneven edge thickness of the organic layer 32 is solved, and the packaging effect of the display panel 100 is effectively improved.
Aiming at the technical problem that the current display panel 100 is difficult to realize low-cost detection of ambient light, the embodiment of the application provides the display panel 100; the display panel 100 comprises a light emitting functional layer 20, an encapsulation layer 30 and a retaining wall 40, wherein the encapsulation layer 30 is arranged on the light emitting functional layer 20, the encapsulation layer 30 comprises a first inorganic layer 31 and an organic layer 32 arranged on the first inorganic layer 31, the retaining wall 40 is in a ring-shaped structure and is arranged around the edge of the organic layer 32, a plurality of grooves 401 which are arranged at intervals are also arranged at the edge area and the corner position of the retaining wall 40 towards one side of the organic layer 32, and the grooves 401 do not penetrate through the retaining wall 40; the above display panel 100 is configured such that the edge of the organic layer 32 surrounds the retaining wall 40 with a ring structure, and each corner position and each frame position of the retaining wall 40 face one side of the organic layer 32 and are further provided with a plurality of grooves 401 arranged at intervals, the grooves 401 do not penetrate the retaining wall 40, the grooves 401 can play a role in draining the organic ink material forming the organic layer 32, and can improve the incomplete filling phenomenon of the organic ink material at the frame position and the corner position of the retaining wall 40, and meanwhile improve the overflowing phenomenon of the organic ink material at the retaining wall 40, thereby solving the problem of uneven edge thickness of the organic layer 32 and further effectively improving the packaging effect of the display panel 100.
The prior art manufacturing the barrier 40 on the back plate for preventing the overflow of the ink for preparing the organic layer 32 has the following disadvantages:
1. the organic material ink still has a risk of overflow, and improvement of the inkjet printing process in the thin film encapsulation is required;
2. the film forming thickness of the organic material ink is uneven in the edge area and the middle area of the retaining wall 40;
3. the organic material ink may be under-filled at the corner of the barrier wall 40;
4. the organic material ink easily overflows the bank 40.
The above-described embodiments of the present application address the above-described shortcomings of the prior art by providing grooves 401 on the retaining wall 40 to improve the uniformity problem of the organic layer 32 in the edge and corner regions of the package region in the thin film packaging technology. The capillary action of the groove 401 of the retaining wall 40 has a drainage effect on the organic material ink, so that the incomplete filling condition of the corner can be improved, and the uneven thickness phenomenon of the edge area can be improved. Meanwhile, the recess 401 is added to the retaining wall 40, so that the boundary for the overflow of the organic material ink is also increased, and the process boundary for the inkjet printing of the organic layer 32 in the thin film encapsulation technology is also increased.
Correspondingly, the embodiment of the application also provides a mobile terminal, which comprises a terminal main body and the display panel 100 according to any one of the above, wherein the terminal main body and the display panel 100 are combined into a whole. The mobile terminal may be a mobile phone, a computer, an intelligent wearable display device, or the like, which is not particularly limited in this embodiment.
The embodiment of the application provides a display panel 100 and a mobile terminal; the display panel 100 includes a light emitting functional layer 20, an encapsulation layer 30 and a retaining wall 40, wherein the encapsulation layer 30 includes a first inorganic layer 31 and an organic layer 32 disposed on the first inorganic layer 31, the retaining wall 40 is in a ring structure and disposed around an edge of the organic layer 32, and a plurality of grooves 401 disposed at intervals are further disposed on a side of the retaining wall 40 facing the organic layer 32, and the grooves 401 do not penetrate the retaining wall 40; above-mentioned display panel 100 is through the barricade 40 that is annular structure at the edge of organic layer 32 around the one deck, and the barricade 40 still is provided with a plurality of recesses 401 that the interval set up towards one side of organic layer 32, recess 401 does not run through barricade 40, recess 401 can play the effect of drainage to the organic ink material that forms organic layer 32, can improve the edge of barricade 40 and the incomplete phenomenon of organic ink material filling in corner position department, improve the phenomenon that organic ink material overflows barricade 40 simultaneously, thereby reduce the uneven problem of edge thickness of organic layer 32, and then effectively promoted the encapsulation effect of display panel 100.
The display panel 100 and the mobile terminal provided by the embodiments of the present application are described in detail, and specific examples are applied to illustrate the principles and embodiments of the present application, and the description of the above embodiments is only for helping to understand the method and the core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (7)
1. A display panel, comprising:
A light-emitting functional layer;
The packaging layer is arranged on the light-emitting functional layer and comprises a first inorganic layer and an organic layer arranged on the first inorganic layer; and
The retaining wall is of an annular structure and is arranged around the edge of the organic layer;
The retaining wall is provided with a plurality of grooves which are arranged at intervals on one side facing the organic layer, and the grooves do not penetrate through the retaining wall;
The retaining wall is provided with a plurality of corners, the side, facing the organic layer, of each corner position of the retaining wall is provided with a groove, and a part of the retaining wall between two adjacent corners is provided with a plurality of grooves which are arranged at intervals on the side, facing the organic layer, of the retaining wall;
The retaining wall comprises a first sub retaining wall or a second sub retaining wall which is arranged between two adjacent corners, a plurality of first sub grooves are formed in the first sub retaining wall, a plurality of second sub grooves are formed in the second sub retaining wall, and the depth of each groove corresponding to each corner is larger than that of each first sub groove or each second sub groove.
2. The display panel of claim 1, wherein a length of the first sub-retaining wall is greater than a length of the second sub-retaining wall;
the distance between two adjacent first sub-grooves is larger than the distance between two adjacent second sub-grooves.
3. The display panel according to claim 1, wherein a depth of the groove increases from a side away from the organic layer to a side close to the organic layer.
4. The display panel according to claim 1, wherein the retaining wall is provided with a plurality of grooves in a height direction along the retaining wall, and a distance between two adjacent grooves is equal.
5. The display panel of claim 1, further comprising a second inorganic layer disposed on the organic layer;
and in the top view direction of the display panel, the orthographic projection of the retaining wall on the display panel is positioned in the second inorganic layer.
6. The display panel of claim 1, wherein the material of the barrier wall is an organic photoresist material, and the opening size of the recess ranges from 1 μm to 20 μm.
7. A mobile terminal comprising a terminal body and the display panel according to any one of claims 1 to 6, the terminal body being integrated with the display panel.
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| CN202210194532.8A CN114613921B (en) | 2022-03-01 | 2022-03-01 | Display panel and mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210194532.8A CN114613921B (en) | 2022-03-01 | 2022-03-01 | Display panel and mobile terminal |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777266A (en) * | 2018-05-30 | 2018-11-09 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN109301084A (en) * | 2018-09-28 | 2019-02-01 | 京东方科技集团股份有限公司 | Encapsulating structure, electronic device and packaging method |
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| CN109524562B (en) * | 2018-10-23 | 2020-02-14 | 武汉华星光电半导体显示技术有限公司 | Narrow-frame OLED display panel |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108777266A (en) * | 2018-05-30 | 2018-11-09 | 上海天马微电子有限公司 | A kind of display panel and display device |
| CN109301084A (en) * | 2018-09-28 | 2019-02-01 | 京东方科技集团股份有限公司 | Encapsulating structure, electronic device and packaging method |
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