CN109768182B - OLED substrate, array substrate, display panel and display device - Google Patents
OLED substrate, array substrate, display panel and display device Download PDFInfo
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- CN109768182B CN109768182B CN201910063226.9A CN201910063226A CN109768182B CN 109768182 B CN109768182 B CN 109768182B CN 201910063226 A CN201910063226 A CN 201910063226A CN 109768182 B CN109768182 B CN 109768182B
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Abstract
The invention provides an OLED substrate, an array substrate, a display panel and a display device, relates to the technical field of display, and is used for solving the problem that the heat dissipation effect of an electroluminescent layer is not ideal. OLED base plate, including first substrate, still include: a first electrode disposed on the first substrate; a pixel defining layer disposed on a side of the first electrode away from the first substrate, the pixel defining layer including a plurality of opening regions defining sub-pixel light emitting regions and an auxiliary region located around the opening regions; an electroluminescent layer disposed on a side of the first electrode away from the first substrate, the electroluminescent layer being disposed in each of the opening regions; second electrodes arranged on one side of the pixel defining layer away from the first substrate, each second electrode covering one of the opening regions and extending to the auxiliary region; the electroluminescent layer emits light under the drive of the first electrode and the second electrode.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED substrate, an array substrate, a display panel and a display device.
Background
AMOLED (Active-Matrix Organic Light Emitting Diode, active matrix driven organic light emitting diode) effectively combines a driving circuit with the organic light emitting diode, and writes a required signal by using a switching device, so as to control the light emitting brightness of each sub-pixel, and the AMOLED has the advantages of flexibility, foldability, light weight, thinness, wide color gamut, pure solid state and the like, and is widely focused and rapidly developed.
The thermal stability of the electroluminescent layer during normal operation of an AMOLED is important for the normal display of the AMOLED. As shown in fig. 1, a conventional AMOLED structure is illustrated, and as can be seen from fig. 1, a driving circuit film layer 20 is disposed under the electroluminescent layer 10, and heat is released during normal operation, which is unfavorable for releasing heat from the electroluminescent layer 10. In addition, the cathode 30 and the vacuum environment are arranged on the electroluminescent layer 10, so that heat generated by the electroluminescent layer 10 cannot be quickly released upwards after being transferred to the cathode 30, and for large sizes, the heat release by simply relying on the cathode 30 is far from sufficient. Furthermore, the electroluminescent layer 10 itself emits light and generates heat. However, the electroluminescent layer 10 has an excessively high temperature, which affects the stability of the organic material, and is disadvantageous for electron-hole recombination, device lifetime, and the like.
Disclosure of Invention
The embodiment of the invention provides an OLED substrate, an array substrate, a display panel and a display device, which are used for solving the problem that the heat dissipation effect of an electroluminescent layer is not ideal.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical scheme:
in a first aspect, an OLED substrate is provided, including a first substrate, further including: a first electrode disposed on the first substrate; a pixel defining layer disposed on a side of the first electrode away from the first substrate, the pixel defining layer including a plurality of opening regions defining sub-pixel light emitting regions and an auxiliary region located around the opening regions; an electroluminescent layer disposed on a side of the first electrode away from the first substrate, the electroluminescent layer being disposed in each of the opening regions; second electrodes arranged on one side of the pixel defining layer away from the first substrate, each second electrode covering one of the opening regions and extending to the auxiliary region; the electroluminescent layer emits light under the drive of the first electrode and the second electrode.
Optionally, the OLED substrate further includes a first support pillar located in the auxiliary area; the first support columns are arranged between the second electrodes and the pixel defining layer, and the first support columns are in one-to-one correspondence with the second electrodes; wherein the orthographic projection of the second electrode on the first substrate overlaps with the orthographic projection of the first support post on the first substrate.
Optionally, the OLED substrate further includes a second support pillar located in the auxiliary area, and a thickness of the second support pillar is greater than a sum of thicknesses of the first support pillar and the second electrode.
In a second aspect, an array substrate is provided, which is configured to divide a sub-pixel light emitting region and a non-light emitting region around the sub-pixel light emitting region, and includes a second substrate and a thin film transistor disposed on the second substrate, and further includes: the flat layer is arranged on one side, far away from the second substrate, of the thin film transistor, and a via hole is formed in the flat layer; the auxiliary electrodes are arranged on one side, far away from the second substrate, of the flat layer, are positioned in the non-light-emitting area, and are electrically connected with the drain electrode of one thin film transistor through the through holes.
Optionally, the array substrate further includes a third support column located in the non-light-emitting region; the third support columns are arranged between the auxiliary electrodes and the flat layer, and the third support columns are in one-to-one correspondence with the auxiliary electrodes; wherein, the orthographic projection of the auxiliary electrode on the second substrate overlaps with the orthographic projection of the third support column on the second substrate.
Optionally, the array substrate further includes a fourth support column located in the auxiliary area, and a thickness of the fourth support column is greater than a sum of thicknesses of the third support column and the auxiliary electrode.
In a third aspect, a display panel is provided, including the above-mentioned OLED substrate, the OLED substrate does not include the first support column and the second support column, and further includes the above-mentioned array substrate, the array substrate includes at least the third support column; the second electrodes on the OLED substrate are in one-to-one correspondence with the auxiliary electrodes on the array substrate and are electrically connected.
Optionally, in the case that the array substrate includes the fourth support column, a sum of thicknesses of the third support column, the auxiliary electrode, and the second electrode is less than or equal to a thickness of the fourth support column.
In a fourth aspect, a display panel is provided, including the above-mentioned OLED substrate, the OLED substrate includes at least a first support column, and further includes the above-mentioned array substrate, the array substrate does not include a third support column and a fourth support column; the second electrodes on the OLED substrate are in one-to-one correspondence with the auxiliary electrodes on the array substrate and are electrically connected.
Optionally, in the case that the OLED substrate includes the second support column, the sum of the thicknesses of the first support column, the second electrode, and the auxiliary electrode is less than or equal to the thickness of the second support column.
In a fifth aspect, a display device is provided, including the display panel according to the third aspect.
In a sixth aspect, there is provided a display device including the display panel of the fourth aspect.
The invention provides an OLED substrate, an array substrate, a display panel and a display device, wherein an electroluminescent layer is arranged on the OLED substrate, so that direct connection between the electroluminescent layer and a driving circuit film layer on the array substrate can be separated, direct baking of the electroluminescent layer is avoided, the influence of heat generated by the driving circuit film layer on the electroluminescent layer can be avoided, and a heat source is reduced. On the basis, the heat generated by the electroluminescent layer can be directly radiated by the first electrode with a large area through the first substrate, and an effective radiating path is increased, so that the heat stability and the service life of the product can be effectively improved.
In addition, compared with the traditional design, the method has the advantages that the first electrode is prepared on the first substrate, the influence of the support column or pixel definition layer interval difference is avoided, the continuity of the preparation of the first electrode film layer and the uniformity of in-plane film formation are ensured, the resistance of the first electrode is reduced, the in-plane uniformity and stability of a first electrode voltage signal in a large-size AMOLED product are improved, the defects of uneven display, flickering and the like caused by voltage drop or pulling by other alternating signals are avoided, and the display quality of the product is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display panel provided in the prior art;
fig. 2 is a schematic structural diagram of an OLED substrate according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing a structural relationship between a support pillar and a pixel defining layer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an OLED substrate according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram III of an OLED substrate according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an array substrate according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a second embodiment of an array substrate;
fig. 8 is a schematic structural diagram III of an array substrate according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 10 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a display panel according to an embodiment of the present invention.
Reference numerals:
10-an electroluminescent layer; 20-a driving circuit film layer; 30-cathode; 40-a first substrate; 50-a first electrode; 60-pixel defining layer; 61-an open area; 62-auxiliary area; 70-a second electrode; 81-a first support column; 82-a second support column; 110-a second substrate; a 120-thin film transistor; 130-a planar layer; 140-auxiliary electrodes; 151-third support columns; 152-fourth support columns.
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.
The thermal stability of the electroluminescent layer and the stability and uniformity of the cathode (cathode) signal contained therein are important for the proper display of the AMOLED during normal operation of the AMOLED. In the traditional process, the electroluminescent layer lacks an effective heat dissipation path, the periphery of the electroluminescent layer is surrounded by the organic film layer, and the organic film layer does not have good heat dissipation performance; the driving circuit film layer is arranged below the light emitting diode, and heat can be released during normal operation, so that the release of the heat of the electroluminescent layer is also unfavorable; the cathode and the vacuum environment are arranged on the cathode, the heat generated by the electroluminescent layer is not quickly released upwards after being transferred to the cathode, and for large size, the heat release by the cathode is far from sufficient. The electroluminescent layer emits light by utilizing energy released after the electron and the hole are combined, but heat is generated at the same time, the electroluminescent layer can be excessively high in temperature during long-time working, the stability of an organic material is affected, and the electroluminescent layer is unfavorable for electron-hole combination, the service life of a device and the like.
And the cathode is used as a common electrode of the AMOLED to provide needed electrons for normal display of the electroluminescent layer, and the uniformity and stability of the voltage are important for normal display of the display panel. In the conventional process, the support columns or the pixel defining layers have larger step difference, so that the continuity of film formation of the cathode electrode is affected, the in-plane resistance of the cathode electrode is increased, and for a large-size and high-resolution display panel, voltage drop is generated at the far end of the display panel or at a position far away from the writing end of the cathode signal due to the fact that the cathode signal needs to overcome larger resistance value in the transmission process, the cathode signal is different in size at different positions of the display panel, so that uneven display, poor visibility such as flickering and the like are generated, and the product quality is affected. Moreover, if the driving capability of the cathode signal is weakened, the cathode voltage signal is easily pulled by coupling of other alternating signals in the display panel, so that the cathode voltage is distributed unevenly in the surface, and the product quality is affected.
In addition, the preparation process of the traditional design needs to sequentially complete three steps of preparing a driving circuit film layer, preparing a light-emitting device and packaging, so that on one hand, the preparation period can be prolonged, and the productivity is influenced; on the other hand, as the preparation period is long, delay risk is increased in the subsequent process, so that the film layer of the driving circuit is exposed in the air for a long time, the film layer characteristic of the driving circuit is affected, and the related bad electrical characteristic is generated.
Therefore, a new structural design manner of the AMOLED is provided, which can at least improve or optimize one of the problems, and is significant for improving the life and display quality of the AMOLED, especially large-size products, and saving the preparation time.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are merely used to indicate a corresponding positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship is changed accordingly.
An embodiment of the present invention provides an OLED substrate, as shown in fig. 2, including a first substrate 40, a first electrode 50 disposed on the first substrate 40; a pixel defining layer 60 disposed on a side of the first electrode 50 remote from the first substrate 40, the pixel defining layer 60 including a plurality of opening regions 61 defining sub-pixel light emitting regions and an auxiliary region 62 located around the opening regions 61; an electroluminescent layer 10 disposed on a side of the first electrode 50 remote from the first substrate 40, the electroluminescent layer 10 being disposed in each of the opening regions 61; second electrodes 70 disposed on a side of the pixel defining layer 60 away from the first substrate 40, each second electrode 70 covering an opening region 61 and extending to the auxiliary region 62; the electroluminescent layer 10 emits light under the driving of the first electrode 50 and the second electrode 70.
In the first embodiment, the OLED substrate defines a display area and a non-display area, the display area defines a plurality of sub-pixel light emitting areas, and the sub-pixel light emitting areas overlap with the opening area 61 on the pixel defining layer 60. As shown in fig. 3, the pixel defining layer 60 is in a grid shape, the grid is an opening area 61, and the material of the pixel defining layer 60 is a light shielding material.
Second, the first electrode 50 and the second electrode 70 are used to drive the electroluminescent layer 10 to emit light, for example, the OLED substrate includes one first electrode 50, and the first electrode 50 is planar in shape to cover the display area and serve as a cathode. The OLED substrate includes a plurality of independent second electrodes 70, the second electrodes 70 having a block shape, and one second electrode 70 covering one opening area 61 to serve as an anode. The first electrode 50 and the second electrode 70 are a transmissive electrode and a reflective electrode, and the first electrode 50 is a transmissive electrode, the second electrode 70 is a reflective electrode, and the display panel is a top emission display panel when the OLED substrate is applied to the display panel.
In order to improve the flatness of the first electrode 50, the first electrode 50 may be disposed on the surface of the first substrate 40, for example, and the first substrate 40 may be a glass substrate, for example.
Third, the material of the electroluminescent layer 10 may refer to the related art, and the present invention is not limited thereto. An electroluminescent layer 10 is arranged in each of the opening areas 61.
In order to enhance the electron transport effect of holes, a hole transport layer and an electron transport layer may be further provided on both sides of the electroluminescent layer 10, the hole transport layer being located between the electroluminescent layer 10 and the anode, and the electron transport layer being located between the electroluminescent layer 10 and the cathode.
The hole transport layer is made of a hole transport material, and the hole transport material can be a triarylamine series, a biphenyldiamine derivative or a cross-structure linked diamine biphenyl. For example, NPB (N, N '-diphenyl-N, N' - (1-naphthyl) -1,1 '-biphenyl-4, 4' -diamine), TCTA (4, 4 '-Tri (9-carbazolyl) triphenylamine, 4',4"-Tris (carbazol-9-yl) triphenylamine), m-MTDATA (4, 4',4" -Tris (N-3-methylphen-N-phenylamino) triphenylamine, 4',4"-Tris (N-3-methylphenyl-N-phenylamino) triphenylamine), and the like.
The electron transport layer is made of an electron transport material, and the electron transport material can be metal chelate, azole compounds, phenanthroline derivatives and the like, for example, the electron transport material can be: alQ3 (tris (8-hydroxyquinoline) aluminum), BPhen (4, 7-diphenyl-1, 10-phenanthroline), tmPyPB (1, 3, 5-tris [ (3-pyridyl) -3-phenyl ] benzene), OXD-7 (2, 2' - (1, 3-phenyl) bis [5- (4-t-butylphenyl) -1,3, 4-oxadiazole ]), and the like.
Further, in order to increase the injection efficiency of electrons and holes, a hole injection layer and an electron injection layer may be further disposed at both sides of the electroluminescent layer 10, the hole injection layer being located between the hole transport layer and the anode, and the electron injection layer being located between the electron transport layer and the cathode.
In some embodiments, the portion of the second electrode 70 located in the opening region 61 is at the same level as the portion located in the auxiliary region 62. The layer structure disposed between the first electrode 50 and the second electrode 70 and located at the opening region 61 is referred to as a light emitting unit, for example, the light emitting unit includes an electron injection layer, a hole injection layer, an electron transport layer, a hole transport layer, and an electroluminescent layer 10. The thickness of the light emitting unit is the same as that of the pixel defining layer 60, wherein the thickness direction of the light emitting unit is the thickness direction of the OLED substrate.
Fourth, as shown in fig. 2, the second electrode 70 is disposed on the side of the pixel defining layer 60 away from the first substrate 40, and the electroluminescent layer 10 is disposed in the opening region 61, so that the second electrode 70 is necessarily disposed on the side of the electroluminescent layer 10 away from the first substrate 40, and the second electrodes 70 are in one-to-one correspondence with the opening regions 61.
As shown in fig. 2, the second electrode 70 covers the opening region 61 corresponding to the second electrode 70 in the thickness direction of the OLED substrate. That is, the orthographic projection of the second electrode 70 on the first substrate 40 covers the orthographic projection of the opening region 61 corresponding to the second electrode 70 on the first substrate 40.
It will be appreciated by those skilled in the art that the second electrode 70 extends to the auxiliary area 62, but that adjacent second electrodes 70 are not electrically connected in the auxiliary area 62.
According to the OLED substrate provided by the embodiment of the invention, the electroluminescent layer 10 is arranged on the OLED substrate, so that the direct connection between the electroluminescent layer 10 and the driving circuit film layer on the array substrate can be separated, the direct baking of the driving circuit film layer on the electroluminescent layer 10 is avoided, the influence of heat generated by the driving circuit film layer on the electroluminescent layer 10 can be avoided, and the heat source is reduced. On the basis, the heat generated by the electroluminescent layer 10 can be directly dissipated by utilizing the large-area first electrode 50 through the first substrate 40, so that an effective dissipation path is increased, and the thermal stability and the service life of the product can be effectively improved.
In addition, compared with the traditional design, the method for preparing the first electrode 50 on the first substrate 40 has no influence of the step difference of the support column or pixel defining layer 60, ensures the continuity of the preparation of the film layer of the first electrode 50 and the uniformity of in-plane film formation, reduces the resistance of the first electrode 50, improves the in-plane uniformity and stability of the voltage signal of the first electrode 50 in a large-size AMOLED product, avoids the defects of uneven display, flickering and the like caused by voltage drop or pulling by other alternating signals, and improves the display quality of the product.
In some embodiments, as shown in fig. 4, the OLED substrate further includes first support posts 81 located in the auxiliary area 62; the first support pillars 81 are disposed between the second electrodes 70 and the pixel defining layer 60, the first support pillars 81 being in one-to-one correspondence with the second electrodes 70; wherein the orthographic projection of the second electrode 70 on the first substrate 40 overlaps with the orthographic projection of the first support post 81 on the first substrate 40.
Here, the second electrode 70 is disposed on a side of the first electrode 50 remote from the first substrate 40, and an orthographic projection of the second electrode 70 on the first substrate 40 overlaps with an orthographic projection of the first support post 81 on the first substrate 40, that is, the first support post 81 is covered with the second electrode 70 on a surface parallel to the first substrate 40.
The first support columns 81 mainly serve as auxiliary connection functions and are used for lifting up the second electrode 70 so that the second electrode 70 is electrically connected with the auxiliary electrode 140 on the array substrate, and normal operation of the product is ensured. In addition, the first support column 81 also functions as an auxiliary support. In some embodiments, to improve the connection effect between the second electrode 70 and the auxiliary electrode 140 on the array substrate, the front projection of the second electrode 70 on the first substrate 40 covers the front projection of the first support pillar 81 on the first substrate 40.
The material of the first support columns 81 may be selected with reference to the related art, and is not limited herein.
To further ensure the supporting effect, the second electrode 70 is prevented from being damaged, and in some embodiments, as shown in fig. 5, the OLED substrate further includes a second support post 82 located in the auxiliary area 62, where the thickness of the second support post 82 is greater than the sum of the thicknesses of the first support post 81 and the second electrode 70.
The thickness direction of the second support columns 82 is the thickness direction of the OLED substrate, and the material of the second support columns 82 may be the same as the material of the first support columns 81, and both are formed simultaneously.
Here, as shown in fig. 3, the second support columns 82 are located in the auxiliary area 62, but the second support columns 82 do not correspond to the second electrodes 70 one by one, and the number of the second support columns 82 may be reasonably set as long as one second support column 82 corresponds to a plurality of second electrodes 70.
The embodiment of the present invention further provides an array substrate, as shown in fig. 6, which divides a sub-pixel light emitting region and a non-light emitting region around the sub-pixel light emitting region, and the array substrate includes a second substrate 110 and a thin film transistor 120 disposed on the second substrate 110, and further includes: a planarization layer 130 disposed on a side of the thin film transistor 120 away from the second substrate 110, wherein a via hole is disposed on the planarization layer 130; the auxiliary electrodes 140 are disposed on the flat layer 130 at a side far away from the second substrate 110, the auxiliary electrodes 140 are located in the non-light-emitting region, and each auxiliary electrode 140 is electrically connected to a drain electrode of a thin film transistor 120 through a via hole.
Note that, first, fig. 6 illustrates a structure of the thin film transistor 120, but not limited thereto, and the thin film transistor 120 includes a gate electrode, a gate insulating layer, a semiconductor active layer, a source electrode, and a drain electrode.
The thin film transistor 120 may be an amorphous silicon thin film transistor, a polycrystalline silicon thin film transistor, a metal oxide thin film transistor, an organic thin film transistor, or the like, depending on the material of the semiconductor active layer. On this basis, the thin film transistor 120 may be of an interleaved type, an inverted interleaved type, a coplanar type, an inverted coplanar type, or the like. The thin film transistor 120 may be a top gate type, a double gate type, or the like depending on the gate electrode.
The source and drain electrodes of the thin film transistor 120 used in all embodiments of the present invention are symmetrical, so that the source and drain electrodes are indistinguishable. Based on this, in order to distinguish between two electrodes of the thin film transistor 120 except for the gate electrode, one of the electrodes is called a source electrode and the other is called a drain electrode.
Second, the sub-pixel light emitting region of the array substrate corresponds to the opening region 61 of the OLED substrate, and the non-light emitting region corresponds to the auxiliary region 62.
The auxiliary electrode 140 is located in a non-light emitting region, however, the auxiliary electrode 140 may extend to a sub-pixel light emitting region in some embodiments, as desired. For example, when the second electrode 70 of the OLED is a reflective electrode, the auxiliary electrode 140 may extend to the sub-pixel light emitting region regardless of the material of the auxiliary electrode 140. When the second electrode 70 of the OLED is a transmissive electrode, the auxiliary electrode 140 may also extend to the sub-pixel light emitting region when the material of the auxiliary electrode 140 is a light transmissive material. The embodiment of the present invention does not limit the specific material of the auxiliary electrode 140, and the conductive material may be reasonably selected according to the need.
It should be understood by those skilled in the art that the auxiliary electrodes 140 are a plurality of electrodes independently disposed, and each auxiliary electrode 140 is electrically connected to the drain electrode of a thin film transistor 120 through a via hole on the planarization layer 130, and one auxiliary electrode 140 corresponds to one thin film transistor 120. Of course, as shown in fig. 6, the via holes on the planarization layer 130 are also disposed in the non-light-emitting region.
Third, the material of the planarization layer 130 is an organic material, for example, an organic material having good heat insulation properties may be selected, and the planarization function and the heat insulation function are performed.
In the array substrate provided by the embodiment of the invention, the heat generated by the driving circuit film layer can be released through the flat layer 130, and the flat layer 130 is made of an organic material, so that the heat is difficult to pass through the flat layer 130 due to poor heat conductivity. Therefore, after the array substrate and the OLED substrate are packaged, the heat generated by the driving circuit film layer is difficult to pass through the flat layer 130, and the heat passing through the flat layer 130 also needs to pass through the vacuum layer between the array substrate and the OLED substrate, and the vacuum layer is as poor as the flat layer 130 in heat conductivity, so that the influence of the heat generated by the driving circuit film layer on the electroluminescent layer 10 is almost negligible.
In some embodiments, as shown in fig. 7, the array substrate further includes third support columns 151 located in the non-light emitting region; the third support columns 151 are disposed between the auxiliary electrodes 140 and the planarization layer 130, and the third support columns 151 are in one-to-one correspondence with the auxiliary electrodes 140; wherein the orthographic projection of the auxiliary electrode 140 on the second substrate 110 overlaps with the orthographic projection of the third support column 151 on the second substrate 110.
Here, the auxiliary electrode 140 is disposed at a side of the planarization layer 130 remote from the second substrate 110, and an orthographic projection of the auxiliary electrode 140 on the second substrate 110 overlaps with an orthographic projection of the third support column 151 on the second substrate 110, that is, the third support column 151 is covered with the auxiliary electrode 140 on a surface parallel to the second substrate 110.
The third supporting column 151 mainly plays an auxiliary connection role, and is used for raising the auxiliary electrode 140, so that the auxiliary electrode 140 is electrically connected with the second electrode 70 on the OLED substrate, and normal operation of the product is ensured. In addition, the first support column 81 also functions as an auxiliary support. In some embodiments, to improve the connection effect between the auxiliary electrode 140 and the second electrode 70 on the OLED substrate, the orthographic projection of the auxiliary electrode 140 on the second substrate 110 covers the orthographic projection of the third support column 151 on the second substrate 110.
The material of the third support column 151 may be selected with reference to the related art, and is not limited herein.
To further ensure the supporting effect, the auxiliary electrode 140 is prevented from being damaged, in some embodiments, as shown in fig. 8, the array substrate further includes a fourth support column 152 located in the auxiliary area 62, and the thickness of the fourth support column 152 is greater than the sum of the thicknesses of the third support column 151 and the auxiliary electrode 140.
The thickness direction of the fourth support column 152 is the thickness direction of the array substrate, and the material of the fourth support column 152 may be the same as the material of the third support column 151, and both are formed simultaneously.
Here, the fourth support columns 152 are located in the non-light emitting area, but the fourth support columns 152 do not correspond to the auxiliary electrodes 140 one by one, and one fourth support column 152 may correspond to a plurality of auxiliary electrodes 140, and the number of fourth support columns 152 may be reasonably set.
The embodiment of the invention also provides a display panel, as shown in fig. 9, which comprises the above-mentioned OLED substrate, wherein the OLED substrate is not provided with a first support column 81 and a second support column 82; the array substrate is provided with at least a third support column 151; the second electrodes 70 on the OLED substrate are in one-to-one correspondence with and electrically connected to the auxiliary electrodes 140 on the array substrate.
Here, after the OLED substrate and the array substrate are packaged, the sub-pixel light emitting region of the array substrate corresponds to the opening region 61 of the OLED substrate, and the non-light emitting region corresponds to the auxiliary region 62.
According to the display panel provided by the invention, the data signals on the data lines are transmitted to the second electrode 70 through the auxiliary electrode 140, normal operation of products is ensured, the electroluminescent layer 10 and the driving circuit film layer are respectively arranged on the first substrate 40 and the second substrate 110, and unlike a traditional preparation process, the display panel can realize simultaneous preparation of the driving circuit film layer and the film layer related to the electroluminescent layer 10, save preparation time, improve productivity, and avoid Delay in the preparation process from influencing the characteristics of the driving circuit film layer.
In the case that the array substrate includes the fourth support columns 152, the sum of the thicknesses of the third support columns 151, the auxiliary electrode 140, and the second electrode 70 is equal to or less than the thickness of the fourth support columns 152.
That is, the thickness of the fourth support post 152 cannot affect the electrical connection between the second electrode 70 and the auxiliary electrode 140, or the thickness of the fourth support post 152 is equal to or approximately equal to the sum of the thicknesses of the third support post 151, the auxiliary electrode 140, and the second electrode 70, or the thickness of the fourth support post 152 is slightly smaller than the sum of the thicknesses of the third support post 151, the auxiliary electrode 140, and the second electrode 70, but cannot be too small, or the support function is not performed.
The embodiment of the invention also provides a display device which comprises the display panel.
The display device can be products or components with any display function, such as an OLED display, an OLED television, a digital photo frame, a mobile phone, a tablet personal computer, a navigator and the like.
The embodiment of the present invention further provides a display panel, as shown in fig. 10, including the above-mentioned OLED substrate including at least the first support post 81, and further including the above-mentioned array substrate excluding the third support post 151 and the fourth support post 152; the second electrodes 70 on the OLED substrate are in one-to-one correspondence with and electrically connected to the auxiliary electrodes 140 on the array substrate.
Here, after the OLED substrate and the array substrate are packaged, the sub-pixel light emitting region of the array substrate corresponds to the opening region 61 of the OLED substrate, and the non-light emitting region corresponds to the auxiliary region 62.
As shown in fig. 11, the electroluminescent layer 10 is disposed on the first substrate 40, so that the film on the OLED substrate and the film on the array substrate can be prepared simultaneously, and after the two components are prepared separately, the packaging operation is performed. After the driving circuit film layer is prepared on the second substrate 110, the relevant film layer of the electroluminescent layer 10 is continuously prepared, and then the packaging is performed.
According to the display panel provided by the invention, the data signals on the data lines are transmitted to the second electrode 70 through the auxiliary electrode 140, and the electroluminescent layer 10 and the driving circuit film layer are respectively arranged on the first substrate 40 and the second substrate 110, so that the driving circuit film layer and the film layer related to the electroluminescent layer 10 can be prepared simultaneously, the preparation time is saved, the productivity is improved, and the Delay in the preparation process is avoided, so that the characteristics of the driving circuit film layer are influenced, unlike the traditional preparation process.
In the case that the OLED substrate includes the second support post 82, the sum of the thicknesses of the first support post 81, the second electrode 70, and the auxiliary electrode 140 is equal to or less than the thickness of the second support post 82.
That is, the thickness of the second support post 82 cannot affect the electrical connection between the second electrode 70 and the auxiliary electrode 140, or the thickness of the second support post 82 is equal to or approximately equal to the sum of the thicknesses of the first support post 81, the second electrode 70, and the auxiliary electrode 140, or the thickness of the second support post 82 is slightly smaller than the sum of the thicknesses of the first support post 81, the second electrode 70, and the auxiliary electrode 140, but cannot be too small, or the support function is not performed.
The embodiment of the invention also provides a display device which comprises the display panel.
The display device can be products or components with any display function, such as an OLED display, an OLED television, a digital photo frame, a mobile phone, a tablet personal computer, a navigator and the like.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The display panel is characterized by comprising an OLED substrate and an array substrate; the OLED substrate includes:
a first substrate;
a first electrode disposed on the first substrate;
a pixel defining layer disposed on a side of the first electrode away from the first substrate, the pixel defining layer including a plurality of opening regions defining sub-pixel light emitting regions and an auxiliary region located around the opening regions;
an electroluminescent layer disposed on a side of the first electrode away from the first substrate, the electroluminescent layer being disposed in each of the opening regions;
second electrodes arranged on one side of the pixel defining layer away from the first substrate, each second electrode covering one of the opening regions and extending to the auxiliary region;
wherein the electroluminescent layer emits light under the drive of the first electrode and the second electrode;
the OLED substrate further comprises a first support column and a second support column which are positioned in the auxiliary area;
the first support columns are arranged between the second electrodes and the pixel defining layer, and the first support columns are in one-to-one correspondence with the second electrodes;
wherein the orthographic projection of the second electrode on the first substrate overlaps with the orthographic projection of the first support post on the first substrate;
the array substrate is divided into a sub-pixel light-emitting area and a non-light-emitting area positioned around the sub-pixel light-emitting area, the non-light-emitting area corresponds to the auxiliary area, and the array substrate comprises:
a second substrate and a thin film transistor disposed on the second substrate;
the flat layer is arranged on one side, far away from the second substrate, of the thin film transistor, and a via hole is formed in the flat layer;
the auxiliary electrodes are arranged on one side of the flat layer, which is far away from the second substrate, and are positioned in the non-light-emitting area, and each auxiliary electrode is electrically connected with the drain electrode of one thin film transistor through the via hole;
the second electrodes on the OLED substrate are in one-to-one correspondence with the auxiliary electrodes on the array substrate and are electrically connected;
the sum of the thicknesses of the first support column, the second electrode and the auxiliary electrode is smaller than the thickness of the second support column.
2. The display panel is characterized by comprising an OLED substrate and an array substrate; the OLED substrate includes:
a first substrate;
a first electrode disposed on the first substrate;
a pixel defining layer disposed on a side of the first electrode away from the first substrate, the pixel defining layer including a plurality of opening regions defining sub-pixel light emitting regions and an auxiliary region located around the opening regions;
an electroluminescent layer disposed on a side of the first electrode away from the first substrate, the electroluminescent layer being disposed in each of the opening regions;
second electrodes arranged on one side of the pixel defining layer away from the first substrate, each second electrode covering one of the opening regions and extending to the auxiliary region;
wherein the electroluminescent layer emits light under the drive of the first electrode and the second electrode;
the array substrate is used for dividing a sub-pixel light-emitting area and a non-light-emitting area positioned around the sub-pixel light-emitting area, the non-light-emitting area corresponds to the auxiliary area, the array substrate comprises a second substrate and a thin film transistor arranged on the second substrate, and the array substrate further comprises:
the flat layer is arranged on one side, far away from the second substrate, of the thin film transistor, and a via hole is formed in the flat layer;
the auxiliary electrodes are arranged on one side of the flat layer, which is far away from the second substrate, and are positioned in the non-light-emitting area, and each auxiliary electrode is electrically connected with the drain electrode of one thin film transistor through the via hole;
the second electrodes on the OLED substrate are in one-to-one correspondence with the auxiliary electrodes on the array substrate and are electrically connected;
the array substrate further comprises a third support column positioned in the non-light-emitting area;
the third support columns are arranged between the auxiliary electrodes and the flat layer, and the third support columns are in one-to-one correspondence with the auxiliary electrodes;
wherein the orthographic projection of the auxiliary electrode on the second substrate overlaps with the orthographic projection of the third support column on the second substrate;
the array substrate further comprises a fourth support column located in the auxiliary area, and the sum of the thicknesses of the third support column, the auxiliary electrode and the second electrode is smaller than the thickness of the fourth support column.
3. A display device comprising the display panel of claim 1 or 2.
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| CN111599942B (en) * | 2020-05-27 | 2022-12-27 | 京东方科技集团股份有限公司 | Array substrate, display panel and display device |
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| KR100617195B1 (en) * | 2004-06-24 | 2006-09-01 | 엘지전자 주식회사 | method for fabrication OLED of adhesion type |
| KR100642490B1 (en) * | 2004-09-16 | 2006-11-02 | 엘지.필립스 엘시디 주식회사 | Organic Electro luminescence Device and fabrication method thereof |
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| KR101352118B1 (en) * | 2008-08-08 | 2014-01-14 | 엘지디스플레이 주식회사 | Light emitting diode display device and method for driving the same |
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