CN108011052B - Display panel and display device - Google Patents
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- CN108011052B CN108011052B CN201810076189.0A CN201810076189A CN108011052B CN 108011052 B CN108011052 B CN 108011052B CN 201810076189 A CN201810076189 A CN 201810076189A CN 108011052 B CN108011052 B CN 108011052B
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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
- H10K50/805—Electrodes
- H10K50/82—Cathodes
- H10K50/824—Cathodes combined with auxiliary electrodes
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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
- H10K50/841—Self-supporting sealing arrangements
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Abstract
The embodiment of the invention provides a display panel and a display device. In the display panel, a plurality of support columns are positioned on one side of the pixel definition layer far away from the array substrate, the cross-sectional area of one end of each support column close to the array substrate is larger than that of one end of each support column far away from the array substrate, the orthographic projection of the support columns on the array substrate is not overlapped with the orthographic projection of the first openings on the array substrate, the transparent cover plate is positioned on one end of each support column far away from the array substrate, the auxiliary electrode covers one side of the transparent cover plate close to the support columns, the auxiliary electrode comprises a plurality of concave areas bending towards the transparent cover plate, the concave areas are arranged corresponding to the support columns, the concave areas on the auxiliary electrode cover the surface of one end of each corresponding support column far away from the array substrate and the partial side wall of the support column close to the, after adopting above-mentioned design, be favorable to improving display panel's display effect and reducing the damaged probability of transparent cover plate.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
In the prior art, a cathode layer in a display panel is of a whole-surface structure, and a thickness of a film layer is relatively thin, so that a resistance corresponding to a unit area of the cathode layer is relatively large, and meanwhile, the cathode layer is electrically connected with a power signal line through a contact point, so that in a working process of the display panel, a voltage drop at a position of the cathode layer farther from the contact point is more obvious, and thus, brightness of a display area corresponding to the position farther from the contact point is smaller, and further, brightness of different display areas in the display panel is different, that is, brightness of different display areas of the display panel is not uniform, and a display effect of the display panel is poor.
Disclosure of Invention
The embodiment of the invention provides a display panel and a display device, which are used for solving the problem of poor display effect of the display panel in the prior art.
In one aspect, an embodiment of the present invention provides a display panel, where the display panel includes:
an array substrate;
a pixel defining layer on the substrate base plate, the pixel defining layer including a plurality of first openings;
a plurality of supporting columns, wherein the supporting columns are positioned on one side of the pixel defining layer away from the array substrate, the cross-sectional area of one end, close to the array substrate, of each supporting column is larger than that of one end, away from the array substrate, of each supporting column, and the orthographic projections of the supporting columns on the array substrate do not overlap with the orthographic projections of the first openings on the array substrate;
the transparent cover plate is positioned at one end, far away from the array substrate, of the support column;
the auxiliary electrode covers one side of the transparent cover plate close to the supporting columns, the auxiliary electrode comprises a plurality of concave regions which are bent towards the transparent cover plate, the concave regions are arranged corresponding to the supporting columns, and the concave regions on the auxiliary electrode cover one end surface of the corresponding supporting column far away from the array substrate and part of the side wall of the supporting column close to the end;
a cathode layer between the pixel defining layer and the auxiliary electrode, the cathode layer being coupled to the auxiliary electrode.
In another aspect, an embodiment of the present invention provides a display device, which includes the display panel described above.
Any one of the above technical solutions has the following beneficial effects:
in the embodiment of the invention, the auxiliary electrode is arranged on one side of the transparent cover plate close to the support column, the cathode layer is positioned between the pixel definition layer and the auxiliary electrode, and the cathode layer is coupled with the auxiliary electrode. Meanwhile, in the embodiment of the present invention, the cross-sectional area of one end of the supporting column close to the array substrate is larger than the cross-sectional area of one end of the supporting column far from the array substrate, and since the auxiliary electrode covers one side of the transparent cover plate close to the supporting column, the auxiliary electrode includes a plurality of recessed regions bent toward the transparent cover plate, the plurality of recessed regions are disposed corresponding to the plurality of supporting columns, and the plurality of recessed regions on the auxiliary electrode cover the surface of one end of the corresponding supporting column far from the array substrate and a part of the side wall of the supporting column close to the end, after the above design is adopted, compared with the prior art (the end of the supporting column with smaller cross-sectional area is in contact with the transparent cover plate, the contact area of the supporting column and the transparent cover plate is relatively smaller, which easily causes damage to the transparent cover plate), the pressure of the supporting columns in unit area to the transparent cover plate is reduced, and therefore the probability of damage of the transparent cover plate is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the invention;
FIG. 2 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of another 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 top view of a display panel according to an embodiment of the invention;
FIG. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the invention;
FIG. 8 is a schematic top view of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe XXX in embodiments of the present invention, these XXX should not be limited to these terms. These terms are only used to distinguish XXX from each other. For example, a first XXX may also be referred to as a second XXX, and similarly, a second XXX may also be referred to as a first XXX, without departing from the scope of embodiments of the present invention.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic cross-sectional view of a display panel according to an embodiment of the present invention, where as shown in fig. 1, the display panel includes: an array substrate 1; a pixel defining layer 2, the pixel defining layer 2 being located on the substrate base plate, the pixel defining layer 2 including a plurality of first openings 21; the supporting columns 3 are located on one side, away from the array substrate 1, of the pixel definition layer 2, the cross-sectional area of one end, close to the array substrate 1, of each supporting column 3 is larger than that of one end, away from the array substrate 1, of each supporting column 3, and the orthographic projections, on the array substrate 1, of the supporting columns 3 are not overlapped with the orthographic projections, on the array substrate 1, of the first openings 21; the transparent cover plate 4 is positioned at one end, far away from the array substrate 1, of the support column 3; the auxiliary electrode 5, the auxiliary electrode 5 covers one side of the transparent cover plate 4 close to the supporting pillars 3, the auxiliary electrode 5 includes a plurality of concave regions 51 bending towards the transparent cover plate 4, the plurality of concave regions 51 are arranged corresponding to the plurality of supporting pillars 3, the plurality of concave regions 51 on the auxiliary electrode 5 cover one end surface of the corresponding supporting pillars 3 far away from the array substrate 1 and a part of side walls of the supporting pillars 3 close to the end; a cathode layer 6, the cathode layer 6 being located between the pixel defining layer 2 and the auxiliary electrode 5, and the cathode layer 6 being coupled to the auxiliary electrode 5.
Specifically, as shown in fig. 1, the auxiliary electrode 5 and the cathode layer 6 are connected at a position corresponding to each support column 3, that is, the auxiliary electrode 5 and the cathode layer 6 are connected in parallel, so that the cross-sectional area of the cathode layer 6 is increased in an equivalent circuit, which is beneficial to reducing the resistance of the cathode layer 6 per unit area.
As shown in fig. 1, in the embodiment of the present invention, the cross-sectional area of one end of the supporting column 3 close to the array substrate 1 is larger than the cross-sectional area of one end of the supporting column 3 away from the array substrate 1, and since the auxiliary electrode 5 covers one side of the transparent cover plate 4 close to the supporting column 3, the auxiliary electrode 5 includes a plurality of recessed regions 51 bending towards the transparent cover plate 4, the plurality of recessed regions 51 are disposed corresponding to the plurality of supporting columns 3, and the plurality of recessed regions 51 on the auxiliary electrode 5 cover the surface of one end of the corresponding supporting column 3 away from the array substrate 1 and a portion of the side wall of the supporting column 3 close to the end, after adopting the above design, compared with the prior art (the end of the supporting column with smaller cross-sectional area is in contact with the transparent cover plate, the contact area of the supporting column with the transparent cover plate is relatively smaller, which is easy to cause, when external force is exerted on the transparent cover plate 4, the pressure of the support column 3 on the transparent cover plate 4 in unit area is favorably reduced, so that the probability of damage of the transparent cover plate 4 is favorably reduced.
As shown in fig. 1, the pixel defining layer 2 is used to define different sub-pixel units 22, the sub-pixel units 22 are disposed in the first openings 21, wherein a sub-pixel unit 22 of one color is disposed in each first opening 21; the supporting column 3 is used for supporting the transparent cover plate 4, so that the transparent cover plate 4 is separated from the pixel defining layer 2, external stress cannot directly act on the sub-pixel unit 22, the structure in the sub-pixel unit 22 is protected, the orthographic projection of the supporting column 3 on the array substrate 1 is positioned in the orthographic projection of the pixel defining layer 2 on the array substrate 1, the design is favorable for reducing the influence of the supporting column 3 on light rays emitted by the sub-pixel unit, the light emitting efficiency of the display panel is improved, the supporting column 3 cannot be displayed on the display panel, and the display effect of the display panel is improved; the transparent cover plate 4 may be made of glass, and the transparent cover plate 4 is used for protecting the internal structure of the display panel and isolating external water and oxygen, so as to reduce the erosion rate of the external water and oxygen to the internal structure of the display panel.
Alternatively, as shown in fig. 1, the auxiliary electrode 5 includes a plurality of first grooves, the plurality of first grooves are disposed corresponding to the plurality of supporting pillars 3, and the plurality of first grooves form a plurality of recessed regions 51.
Specifically, as shown in fig. 1, a plurality of first grooves are provided on the side of the auxiliary electrode 5 adjacent to the supporting posts 3, the shape of the first groove is the same as or similar to the shape formed by the side and part of the side wall of the support column 3 far away from the array substrate 1, the side and part of the side wall of the support column 3 far away from the array substrate 1 are contacted with the first groove, i.e., the first groove covers the side of the support post 3 far away from the array substrate 1 and a part of the side wall, so that the contact area of the support post 3 and the auxiliary electrode 5 is increased, thereby being beneficial to reducing the pressure of the support column 3 to the transparent cover plate 4 in unit area, being beneficial to reducing the damage probability of the transparent cover plate 4, and, because the thickness of each position of the transparent cover plate 4 is equal, the mechanical strength of each position of the transparent cover plate 4 is equal, and the probability of damage of the transparent cover plate 4 is further reduced.
For example, the first recess 51 may be formed by a semi-transparent mask process, which may include the steps of:
step 1: and forming a photoresist film layer on one side of the auxiliary electrode 5 close to the support pillar 3.
Step 2: and covering a semi-permeable mask plate on one side of the photoresist film layer close to the support column 3.
Wherein the semi-permeable mask enables different depths to be etched away at different positions of the auxiliary electrode 5.
And step 3: and exposing the photoresist module.
And 4, step 4: and removing the semi-permeable mask.
And 5: and developing the photoresist film layer to form a specified pattern on the photoresist film layer.
Step 6: the auxiliary electrode 5 is processed using an ion etching process using a photoresist module having a designated pattern to form a plurality of first grooves 51 on the auxiliary electrode 5.
And 7: and removing the photoresist film layer with the specified pattern.
Optionally, fig. 2 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, as shown in fig. 2, a plurality of second grooves are disposed on one side of the transparent cover plate 4 close to the array substrate 1, the plurality of second grooves are disposed corresponding to the plurality of supporting pillars 3, and the auxiliary electrode 5 forms a plurality of recessed regions 51 at the second grooves.
Specifically, as shown in fig. 2, a second groove is disposed on a side of the transparent cover plate 4 close to the array substrate 1, the shape of the second groove is the same as or similar to the shape formed by a side and a part of a sidewall of the support pillar 3 away from the array substrate 1, the auxiliary electrode 5 covers a side of the transparent cover plate 4 close to the array substrate 1, so that the auxiliary electrode 5 covers a side and a part of a sidewall of the support pillar 3 away from the array substrate 1, the contact area between the support pillar 3 and the auxiliary electrode 5 is increased, thereby facilitating to reduce the pressure of the support pillar 3 to the transparent cover plate 4 in a unit area, thereby facilitating to reduce the probability of damage to the transparent cover plate 4, and after the above design is adopted, the thicknesses of the positions of the auxiliary electrode 5 can be made equal, the resistances of the positions of the auxiliary electrode 5 in the unit area can be made equal, and the electrical properties of the positions, after the auxiliary electrode 5 is coupled to the cathode layer 6, the equivalent resistance at each position of the cathode layer 6 is also substantially equal, which is beneficial to improving the electrical performance at each position of the cathode layer 6.
Meanwhile, when the auxiliary electrode 5 is manufactured, the auxiliary electrode 5 can be formed by only depositing the material of the auxiliary electrode 5 by adopting a chemical vapor deposition process or a physical vapor deposition process without performing exposure treatment, development treatment, etching process and the like, so that the process complexity of the auxiliary electrode 5 and the manufacturing period of the auxiliary electrode 5 can be reduced, the production efficiency can be improved, and the manufacturing cost of the display panel can be reduced.
Optionally, fig. 3 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention, as shown in fig. 3, a plurality of protrusion structures are disposed on one side of the transparent cover plate 4 close to the array substrate 1, the plurality of protrusion structures are disposed corresponding to the plurality of support pillars 3, and a second groove is disposed on one side of the protrusion structures close to the array substrate 1.
Specifically, as shown in fig. 3, a plurality of protruding structures are disposed on one side of the transparent cover plate 4 close to the array substrate 1, a second groove is disposed on one side of the protruding structures close to the array substrate 1, the auxiliary electrode 5 covers one side of the transparent cover plate 4 close to the array substrate 1, and the auxiliary electrode 5 forms a recessed region 51 at the second groove, so that the auxiliary electrode 5 can cover one side and a part of the sidewall of the supporting column 3 away from the array substrate 1 at the second groove, and the contact area between the supporting column 3 and the auxiliary electrode 5 is increased, thereby being beneficial to reducing the pressure of the supporting column 3 to the transparent cover plate 4 in a unit area, thereby being beneficial to reducing the probability of damage of the transparent cover plate 4, and after the above design is adopted, because the thickness of the position of the transparent cover plate 4 corresponding to the supporting column 3 is thicker, thereby the mechanical strength of the position is greater, and because the transparent cover plate 4, the lining between the support column 3 and the transparent cover plate 4 acts on the position, because the mechanical strength on the position is large, the transparent cover plate 4 is not easy to break after receiving external stress, meanwhile, because the thicknesses of the positions of the auxiliary electrodes 5 are equal, the resistances in the unit areas of the positions of the auxiliary electrodes 5 are equal, the electrical performance of the positions of the auxiliary electrodes 5 is equal, after the auxiliary electrodes 5 are coupled with the cathode layer 6, the equivalent resistances of the positions of the cathode layer 6 are also basically equal, and the improvement of the electrical performance of the positions of the cathode layer 6 is facilitated.
Alternatively, as shown in fig. 1 to 3, the auxiliary electrode 5 is a full-surface structure, and the auxiliary electrode 5 is a transparent electrode.
Specifically, as shown in fig. 1 to 3, when the auxiliary electrode 5 is of a full-surface structure, the total resistance of the auxiliary electrode 5 is relatively large, and after the auxiliary electrode is connected in parallel with the cathode layer 6, the equivalent total resistance of the cathode layer 6 can be relatively small, so that the resistance in the unit area of the cathode layer 6 is further reduced, and further, the brightness difference of different display areas in the display panel is further reduced, and the display effect of the display panel is improved. And when the auxiliary electrode 5 is a transparent electrode, the influence of the auxiliary electrode 5 on the light emitted by the display panel is favorably reduced, so that the light emitting efficiency of the display panel is favorably improved.
It should be noted that the auxiliary electrode 5 has a full-surface structure, which means that the orthographic projection of the auxiliary electrode 5 on the array substrate 1 can cover the whole display area of the array substrate 1.
Alternatively, fig. 4 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention, and fig. 5 is a top view of the display panel provided in the embodiment of the present invention, as shown in fig. 4 and fig. 5, the auxiliary electrode 5 is a mesh structure, an orthogonal projection of the auxiliary electrode 5 on the array substrate 1 is located in an orthogonal projection of the pixel definition layer 2 on the array substrate 1, and an orthogonal projection of the auxiliary electrode 5 on the array substrate 1 at least partially overlaps an orthogonal projection of the plurality of supporting pillars 3 on the array substrate 1.
Specifically, as shown in fig. 4 and 5, the auxiliary electrode 5 is a mesh structure, and the orthographic projection of the auxiliary electrode 5 on the array substrate 1 is located in the orthographic projection of the pixel defining layer 2 on the array substrate 1, so that when the resistance of the cathode layer 6 per unit area is reduced, the auxiliary electrode 5 does not affect the light emitted by the display panel, and a material which is opaque but has high conductive efficiency can be used, so that the material of the auxiliary electrode 5 is more widely selected.
Alternatively, as shown in fig. 1 to 4, the cathode layer 6 is a full-surface structure, the cathode layer 6 covers an end of the plurality of support pillars 3 away from the array substrate 1 and a sidewall of the end, and the cathode layer 6 is coupled to the auxiliary electrode 5 in the recessed area 51.
Specifically, as shown in fig. 1 to 4, when the cathode layer 6 is of a whole structure, the equivalent cross-sectional area of the cathode layer 6 is relatively large, which is beneficial to reducing the voltage drop difference of the cathode layer 6 at different positions, and further, the brightness difference of different display areas in the display panel is relatively small, which is beneficial to improving the display effect of the display panel, and when the cathode layer 6 is coupled with the auxiliary electrode 5 in the concave area 51, the area of the cathode layer 6 contacting with the auxiliary electrode 5 is relatively large, so that the coupling of the cathode layer 6 and the auxiliary electrode 5 is more stable, and the phenomenon of point discharge at the connection position can be avoided when the area of the cathode layer 6 contacting with the auxiliary electrode 5 is relatively small, thereby improving the safety of the internal structure of the display panel.
Optionally, fig. 6 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention, and as shown in fig. 6, the display panel further includes: the conductive parts 7 are arranged corresponding to the support pillars 3, and the conductive parts 7 cover the surface of one end of the corresponding support pillar 3 far away from the array substrate 1 and the side wall of the support pillar 3; an organic layer 8, wherein the organic layer 8 is positioned between the cathode layer 6 and the pixel defining layer 2, and the orthographic projection of the organic layer 8 on the array substrate 1 is positioned in the orthographic projection of the first opening 21 on the array substrate 1; the cathode layer 6 is a whole surface structure, the cathode layer 6 covers the conductive portion 7 at a side away from the array substrate 1, and the cathode layer 6 is coupled to the auxiliary electrode 5 in the recessed region 51.
In the prior art, the organic layer includes an electron transport layer, an electron injection layer, a hole transport layer, a control injection layer, and the like, and the film structure is a whole-surface structure, in the embodiment of the present invention, the organic layer 8 may be formed by a high-precision metal mask process, so that an orthographic projection of the organic layer 8 on the array substrate 1 is located in an orthographic projection of the first opening 21 on the array substrate 1, after the cathode layer 6 is damaged, the cathode layer 6 and the auxiliary electrode 5 may still be electrically connected with each other through the conductive portion 7, and the problem of the electronic transport layer, the electron injection layer, the hole transport layer, the control injection layer, and the like, which are in the whole-surface structure, causing the stealing of the sub-pixel unit due to the lateral electric leakage, can also be solved.
Specifically, for a detailed description of the design of fig. 6 in which the cathode layer 6 is a whole-surface structure, reference may be made to fig. 1 to fig. 4, which are not repeated herein in detail, during the use of the display panel, the auxiliary electrode 5 and the cathode layer 6 may slightly displace relative to each other, so that the cathode layer 6 may be damaged, as shown in fig. 6, after the cathode layer 6 is damaged, the cathode layer 6 may be coupled with the auxiliary electrode 5 through the conductive portion 7, thereby improving the reliability of the display panel.
As shown in fig. 6, the organic layer 8 in each first opening 21 forms a sub-pixel unit 22, and the organic layers 8 in different first openings 21 form sub-pixel units 22 with different colors, so that the display panel displays different colors in different first openings 21 during operation, thereby enabling the display panel to display images.
Optionally, fig. 7 is a schematic cross-sectional view of another display panel provided in an embodiment of the present invention, and fig. 8 is a schematic top view of the another display panel provided in the embodiment of the present invention, and as shown in fig. 7 and fig. 8, the display panel further includes: the conductive parts 7 are arranged corresponding to the support pillars 3, and the conductive parts 7 cover the surface of one end of the corresponding support pillar 3 far away from the array substrate 1 and the side wall of the support pillar 3; an organic layer 8, wherein the organic layer 8 is positioned between the cathode layer 6 and the pixel defining layer 2, and the orthographic projection of the organic layer 8 on the array substrate 1 is positioned in the orthographic projection of the first opening 21 on the array substrate 1; the cathode layer 6 is a mesh structure, the mesh structure includes a plurality of second openings 61, the plurality of second openings 61 are disposed corresponding to the plurality of conductive portions 7, an orthographic projection of the conductive portion 7 on the array substrate 1 is located within an orthographic projection of the corresponding second opening 61 on the array substrate 1, the cathode layer 6 is coupled to the plurality of conductive portions 7, and the plurality of conductive portions 7 are coupled to the auxiliary electrode 5 in the recessed region 51.
Specifically, as shown in fig. 7 and 8, detailed description about the conductive portion 7 and the organic layer 8 can be made with reference to fig. 6, as shown in fig. 7 and 8, the cathode layer 6 is a mesh structure, the mesh structure includes a plurality of second openings 61, an orthogonal projection of the conductive portion 7 on the array substrate 1 is located within an orthogonal projection of the corresponding second opening 61 on the array substrate 1, the cathode layer 6 is coupled to the auxiliary electrode 5 through the conductive portion 7, with the above design, it is avoided that when the cathode layer 6 is covered on the conductive part 7, the cathode layer 6 and the auxiliary electrode 5 are slightly displaced relative to each other under the action of stress, and when the cathode layer 6 is damaged, the damaged cathode layer 6 is affected on the display panel, the display effect of the display panel is affected, meanwhile, the damage of stress on the auxiliary electrode 5 is avoided, and the improvement of the conductive reliability of the auxiliary electrode 5 is facilitated.
Alternatively, as shown in fig. 6 and 7, the material of the conductive portion 7 includes silver and/or aluminum.
Specifically, silver and/or aluminum has good conductivity, and as shown in fig. 6 and 7, when the conductive portion 7 is made of silver and/or aluminum and the cathode layer 6 is coupled to the auxiliary electrode 5 through the conductive portion 7, good conductivity between the cathode layer 6 and the auxiliary electrode 5 can be achieved, and a voltage drop on the conductive portion 7 can be reduced, which is beneficial to improving the display effect of the display panel.
Alternatively, as shown in fig. 6 and 7, the conductive portion 7 has a thickness h, 50 < h < 1000 angstroms.
Specifically, as shown in fig. 6 and 7, when the thickness of the conductive portion 7 is h, the resistance of the conductive portion 7 per unit area may be relatively small, so that the conductive portion 7 has good conductivity, and the thickness does not greatly affect the internal structure of the display panel, which is beneficial to reducing the influence of the conductive portion 7 on the manufacturing process of the display panel and reducing the manufacturing difficulty of the display panel.
Alternatively, as shown in fig. 1 to 7, the material of the auxiliary electrode 5 includes indium tin oxide, zinc oxide, and a poly-p-phthalic conductive film.
Specifically, the ito, zno, and the poly (terephthalic acid) conductive film (e.g., polyethylene terephthalate) have good conductivity and transparency, as shown in fig. 1 and 7, when the auxiliary electrode 5 is made of the ito, zno, and the poly (terephthalic acid) conductive film, the influence of the auxiliary electrode 5 on the light-emitting efficiency of the display panel can be reduced, and the reduction of the resistance of the cathode layer 6 per unit area can be facilitated, so as to improve the display effect of the display panel.
Alternatively, as shown in fig. 1 to 7, the auxiliary electrode 5 has a thickness of H, 200 < H < 6000 a.
Specifically, as shown in fig. 1 to 7, when the thickness of the auxiliary electrode 5 is H, the auxiliary electrode 5 has good light transmittance, so that the influence of the auxiliary electrode 5 on the light-emitting efficiency of the display panel is reduced, and meanwhile, the conductivity of the auxiliary electrode 5 can be improved by the thickness, thereby being beneficial to reducing the resistance in the unit area of the cathode layer 6, and further improving the display effect of the display panel.
Fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present invention, and as shown in fig. 9, the display device includes the display panel 100, and details about the working principle of the display device are not repeated herein.
It should be noted that the display device according to the embodiment of the present invention may include, but is not limited to, a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), a mobile phone, an MP3 player, an MP4 player, a smart watch, an in-vehicle display, and the like.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A display panel, comprising:
an array substrate;
a pixel defining layer on the array substrate, the pixel defining layer including a plurality of first openings;
a plurality of supporting columns, wherein the supporting columns are positioned on one side of the pixel defining layer away from the array substrate, the cross-sectional area of one end, close to the array substrate, of each supporting column is larger than that of one end, away from the array substrate, of each supporting column, and the orthographic projections of the supporting columns on the array substrate do not overlap with the orthographic projections of the first openings on the array substrate;
the transparent cover plate is positioned at one end, far away from the array substrate, of the support column;
the auxiliary electrode covers one side of the transparent cover plate close to the supporting columns, the auxiliary electrode comprises a plurality of concave regions which are bent towards the transparent cover plate, the concave regions are arranged corresponding to the supporting columns, and the concave regions on the auxiliary electrode cover one end surface of the corresponding supporting column far away from the array substrate and part of the side wall of the supporting column close to the end;
a cathode layer between the pixel defining layer and the auxiliary electrode, the cathode layer being coupled to the auxiliary electrode;
the conductive parts are arranged corresponding to the support columns and cover the surfaces of one ends of the corresponding support columns, which are far away from the array substrate, and the side walls of the support columns;
an organic layer between the cathode layer and the pixel defining layer, an orthographic projection of the organic layer on the array substrate being within an orthographic projection of the first opening on the array substrate;
the cathode layer is of a whole-surface structure, covers one side of the conducting part far away from the array substrate and is coupled with the auxiliary electrode in the concave area;
or,
the cathode layer is a mesh structure, the mesh structure includes a plurality of second openings, the plurality of second openings are disposed corresponding to the plurality of conductive portions, an orthographic projection of the conductive portion on the array substrate is located within an orthographic projection of the corresponding second opening on the array substrate, the cathode layer is coupled to the plurality of conductive portions, and the plurality of conductive portions are coupled to the auxiliary electrode in the recessed area.
2. The display panel according to claim 1, wherein the auxiliary electrode includes a plurality of first grooves disposed corresponding to the plurality of support pillars, the plurality of first grooves constituting the plurality of recess regions.
3. The display panel of claim 1, wherein a plurality of second grooves are formed on a side of the transparent cover plate close to the array substrate, the plurality of second grooves are arranged corresponding to the plurality of support pillars, and the auxiliary electrodes form a plurality of recessed regions at the second grooves.
4. The display panel of claim 3, wherein a side of the transparent cover plate close to the array substrate is provided with a plurality of protruding structures, the plurality of protruding structures are arranged corresponding to the plurality of supporting pillars, and a side of the protruding structures close to the array substrate is provided with the second groove.
5. The display panel according to claim 1, wherein the auxiliary electrode is a full-face structure, and the auxiliary electrode is a transparent electrode.
6. The display panel according to claim 1, wherein the auxiliary electrode has a mesh structure, an orthogonal projection of the auxiliary electrode on the array substrate is located within an orthogonal projection of the pixel definition layer on the array substrate, and the orthogonal projection of the auxiliary electrode on the array substrate at least partially overlaps with an orthogonal projection of the plurality of support posts on the array substrate.
7. The display panel according to claim 1, wherein a material of the conductive portion includes silver and/or aluminum.
8. The display panel of claim 1, wherein the conductive portion has a thickness h, 50 a < h < 1000 a.
9. The display panel of claim 1, wherein the auxiliary electrode has a thickness of H, 200 a < H < 6000 a.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
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| CN109411522A (en) | 2018-11-06 | 2019-03-01 | 京东方科技集团股份有限公司 | A kind of transparent display panel and preparation method thereof, display device |
| CN110120408B (en) * | 2019-05-05 | 2021-12-03 | 深圳市华星光电半导体显示技术有限公司 | OLED display panel |
| CN110212007A (en) * | 2019-06-21 | 2019-09-06 | 京东方科技集团股份有限公司 | Display base plate, display device and the method for making display base plate |
| CN113629102B (en) * | 2020-05-06 | 2024-06-07 | Oppo广东移动通信有限公司 | Display module, display screen assembly and electronic equipment |
| CN115768189A (en) * | 2022-11-29 | 2023-03-07 | 昆山国显光电有限公司 | Display panel, display device and mask plate |
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| CN103972270A (en) * | 2014-05-09 | 2014-08-06 | 京东方科技集团股份有限公司 | OLED display panel and OLED display device with same |
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| CN107316951A (en) * | 2017-08-16 | 2017-11-03 | 京东方科技集团股份有限公司 | Package substrate and preparation method thereof, OLED display panel and preparation method thereof |
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