CN109713014B - Organic light emitting display panel, device and method for manufacturing organic light emitting display panel - Google Patents
Organic light emitting display panel, device and method for manufacturing organic light emitting display panel Download PDFInfo
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- CN109713014B CN109713014B CN201811634271.7A CN201811634271A CN109713014B CN 109713014 B CN109713014 B CN 109713014B CN 201811634271 A CN201811634271 A CN 201811634271A CN 109713014 B CN109713014 B CN 109713014B
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Abstract
The invention provides an organic light emitting display panel, an organic light emitting display device, and a method of manufacturing the organic light emitting display panel. The organic light emitting display panel comprises a planarization layer, a pixel defining layer on the planarization layer; the pixel definition layer is provided with a plurality of pixel opening areas; each pixel opening area comprises a first organic light-emitting area and a second organic light-emitting area which are adjacent; the first organic light-emitting region comprises a first electrode A, an organic material layer and a second electrode which are sequentially arranged on the planarization layer; the second organic light-emitting region comprises a first insulating layer, a second electrode, an organic material layer and a second electrode which are sequentially arranged on the planarization layer; the first electrode and the second electrode are electrically insulated. In the present invention, the first organic light emitting region and the second organic light emitting region are adjacent to each other, and the distance between the first electrode and the second electrode in the direction parallel to the planarization layer is substantially equal to 0 nm, so that the pixel aperture ratio of the pixel aperture region is high and the display resolution of the organic light emitting display panel is high.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of organic light emitting display, in particular to an organic light emitting display panel, a display device and a manufacturing method of the display panel.
[ background of the invention ]
Currently, display technologies have penetrated various aspects of people's daily lives, and accordingly, more and more materials and technologies are used for display screens. Nowadays, the mainstream display screens mainly include liquid crystal display screens and organic light emitting diode display screens. Because the Organic Light-Emitting Diode (OLED) display screen has a self-luminous property, compared with a liquid crystal display screen, a backlight module which consumes most energy is omitted, and therefore, the Organic Light-Emitting Diode display screen has the advantage of energy saving; in addition, the organic light emitting diode display screen has the characteristic of flexibility and bendability, and the OLED display screen has excellent bendability by adopting the flexible substrate and the plurality of conducting layers which are sequentially formed on the flexible substrate and comprise the thin film transistor driving array layer, the anode layer, the organic light emitting layer, the cathode layer and the thin film packaging layer.
In addition, in order to further improve the refinement of the display screen, increasing the resolution and reducing the pixel size in the organic light emitting display technology are becoming more and more important points in the current technology.
[ summary of the invention ]
The invention provides an organic light emitting display panel, an organic light emitting display device and a method of manufacturing the organic light emitting display panel.
In one aspect, the present invention provides an organic light emitting display panel including a planarization layer, a pixel defining layer on the planarization layer;
the pixel definition layer is provided with a plurality of pixel opening areas;
each of the pixel opening regions includes a first organic light emitting region and a second organic light emitting region adjacent to each other;
the first organic light-emitting region comprises a first electrode A, an organic material layer and a second electrode which are sequentially arranged on the planarization layer;
the second organic light-emitting region comprises a first insulating layer, a second electrode, the organic material layer and the second electrode which are sequentially arranged on the planarization layer;
the first electrode and the second electrode are electrically insulated.
Alternatively, the first and second electrodes are formed by patterning a first and second electrode layer, respectively, and the second electrode layer is formed on the patterned first and second electrode layer.
Optionally, the first and second electrodes are formed by patterning a first electrode layer and etching the patterned first electrode layer.
Optionally, a film thickness of the first insulating layer is larger than a film thickness of the first electrode.
Optionally, a difference between a film thickness of the first insulating layer and a film thickness of the first electrode is 0 nm or more and 50 nm or less.
Optionally, the first insulating layer has a first inverted trapezoid-shaped cross section, the first inverted trapezoid-shaped cross section includes a first bottom edge far away from the planarization layer and a second bottom edge close to the planarization layer, and a side length of the first bottom edge is larger than a side length of the second bottom edge.
Optionally, the first inverted trapezoidal section includes a first oblique side and a second oblique side, an included angle between the first oblique side and the first base is greater than or equal to 30 degrees and less than or equal to 50 degrees, and an included angle between the second oblique side and the first base is greater than or equal to 30 degrees and less than or equal to 50 degrees.
Optionally, the pixel opening region includes a first isolation pillar, the first isolation pillar isolates the organic material layer of the first organic light emitting region from the organic material layer of the second organic light emitting region, and a width of the first isolation pillar in a direction parallel to the planarization layer is greater than or equal to 1 micrometer and less than or equal to 5 micrometers.
Optionally, the first separator column is located between the first and second electrodes.
Optionally, each of the pixel opening regions further includes a third organic light emitting region adjacent to the first organic light emitting region or adjacent to the second organic light emitting region;
the third organic light emitting region comprises a second insulating layer, a third electrode, the organic material layer and the second electrode which are sequentially arranged on the planarization layer;
the film thickness of the second insulating layer is larger than that of the first insulating layer;
the third electrode and the first electrode are electrically insulated, and the third electrode and the second electrode are electrically insulated.
Optionally, the organic light emitting display panel includes a pixel driving circuit including a storage capacitor;
the storage capacitor comprises a first electrode, an insulating medium and a second electrode, wherein the first electrode is positioned between the second electrode and the planarization layer, and the insulating medium is positioned between the first electrode and the second electrode;
the projection of the second organic light emitting region on the planarization layer covers the projection of the first electrode on the planarization layer.
Optionally, the first and second first electrodes have a spacing substantially equal to 0 nm in a direction parallel to the planarization layer;
alternatively, the third electrode and the first electrode are spaced apart by 0 nm in a direction parallel to the planarization layer, and the third electrode and the second electrode are spaced apart by 0 nm in a direction parallel to the planarization layer.
In another aspect, the present invention provides an organic light emitting display device including the organic light emitting display panel.
In still another aspect, the present invention provides a method of manufacturing an organic light emitting display panel, the method including:
forming the first insulating layer on the planarization layer;
forming a first methyl electrode layer on the first insulating layer and the planarization layer by deposition;
forming the first nail electrode on the planarization layer by patterning the first nail electrode layer;
forming a second electrode layer on the first insulating layer, the patterned first electrode layer, by deposition;
forming the second electrode on the first insulating layer by patterning the second electrode layer.
In still another aspect, the present invention provides a method of manufacturing an organic light emitting display panel, the method including:
forming the first insulating layer on the planarization layer;
forming a first insulating layer on the first substrate;
forming the first electrode on the planarization layer and the second electrode on the first insulating layer by patterning the first electrode layer;
and separating the first and second electrodes by etching the patterned first and second electrode layers.
Optionally, the first and second first electrodes have a spacing substantially equal to 0 nm in a direction parallel to the planarization layer.
In the present invention, each of the pixel opening areas of the organic light emitting display panel includes a plurality of organic light emitting areas, such as the first organic light emitting area and the second organic light emitting area, the number of the organic light emitting areas in the pixel opening area is large, and the display resolution of the organic light emitting display panel is high; the first organic light-emitting area comprises the first electrode, the second organic light-emitting area comprises the first insulating layer and the second electrode, when the first organic light-emitting area and the second organic light-emitting area are adjacent, the first electrode is arranged on the planarization layer, the first insulating layer is arranged on the planarization layer, and the second electrode is arranged on the first insulating layer, so that the first electrode and the second first electrode are electrically insulated, and the first organic light-emitting area and the second organic light-emitting area are prevented from mutual interference; the first organic light-emitting area and the second organic light-emitting area are adjacent, and the distance between the first electrode and the second first electrode in the direction parallel to the planarization layer is basically zero, so that the pixel aperture ratio of the pixel aperture area is high, and the display resolution of the organic light-emitting display panel is high.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in 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 invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an organic light emitting display panel 100 in the prior art;
FIG. 2 is a schematic cross-sectional view of an organic light emitting display panel 200 according to an embodiment of the invention;
FIG. 3 is a schematic diagram of a process of fabricating an organic light emitting display panel 200 according to an embodiment of the present invention;
fig. 4 is a schematic view illustrating a process of manufacturing another organic light emitting display panel 200 according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of another organic light emitting display panel 200 according to an embodiment of the invention;
fig. 6 is a schematic plan view illustrating an organic light emitting display panel 200 according to an embodiment of the invention;
fig. 7 is a schematic plan view of another organic light emitting display panel 200 according to an embodiment of the present invention;
fig. 8 is a schematic plan view of another organic light emitting display panel 200 according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of another organic light emitting display panel 200 according to an embodiment of the invention;
fig. 10 is a schematic plan view of an organic light emitting display device 300 according to an embodiment of the present invention;
FIG. 11 is a flowchart illustrating a method 400 for fabricating an OLED panel according to an embodiment of the present invention;
fig. 12 is a flowchart illustrating another method 500 for fabricating an organic light emitting display panel according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. 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, etc. may be used herein to describe devices in accordance with embodiments of the present invention, these devices should not be limited by these terms. These terms are only used to distinguish one device from another. For example, a first device may also be referred to as a second device, and similarly, a second device may also be referred to as a first device, without departing from the scope of embodiments of the present invention.
Fig. 1 is a schematic cross-sectional view of an organic light emitting display panel 100 in the prior art.
As shown in fig. 1, in the related art, the organic light emitting display panel 100 includes a planarization layer 110, a pixel defining layer 120, and a plurality of pixel opening areas 130, each pixel opening area 130 includes one organic light emitting area 140, and the organic light emitting area 140 includes a first electrode 141, an organic material layer 150, and a second electrode 160. Each pixel opening area 130 of the organic light emitting display panel 100 includes one organic light emitting area 140, the number of the organic light emitting areas in the pixel opening area 130 is small, and the display resolution of the organic light emitting display panel 100 is low.
In order to solve the above technical problems, the present invention provides an organic light emitting display panel, an organic light emitting display device, and a method of manufacturing an organic light emitting display panel.
Fig. 2 is a schematic cross-sectional view of an organic light emitting display panel 200 according to an embodiment of the invention.
As shown in fig. 2, in the embodiment of the present invention, the organic light emitting display panel 200 includes a planarization layer 210, a pixel defining layer 220 on the planarization layer 210;
the pixel defining layer 220 is provided with a plurality of pixel opening regions 230;
each pixel opening area 230 includes adjacent first and second organic light emitting areas 240 and 250;
the first organic light emitting region 240 includes a first a electrode 241, an organic material layer 260, and a b electrode 270 sequentially disposed on the planarization layer 210;
the second organic light emitting region 250 includes a first insulating layer 231, a second electrode 251, an organic material layer 260, and a second electrode 270, which are sequentially disposed on the planarization layer 210;
the first and second electrodes 241, 251 are electrically insulated.
In the embodiment of the present invention, each pixel opening area 230 of the organic light emitting display panel 200 includes a plurality of organic light emitting areas, such as a first organic light emitting area 240, a second organic light emitting area 250, and the like, and the number of the organic light emitting areas in the pixel opening area 230 is larger, so that the display resolution of the organic light emitting display panel 200 is higher; the first organic light emitting region 240 includes a first electrode 241, the second organic light emitting region 250 includes a first insulating layer 231 and a second electrode 251, when the first organic light emitting region 240 and the second organic light emitting region 250 are adjacent, the first electrode 241 is disposed on the planarization layer 210, the first insulating layer 231 is disposed on the planarization layer 210, and the second electrode 251 is disposed on the first insulating layer 231, so as to electrically insulate the first electrode 241 from the second electrode 251, and prevent the first organic light emitting region 240 and the second organic light emitting region 250 from interfering with each other; the first organic light emitting region 240 and the second organic light emitting region 250 are adjacent to each other, and the distance between the first and second electrodes 241 and 251 in the direction parallel to the planarization layer 210 is substantially zero, so that the pixel aperture ratio of the pixel aperture area 230 is high and the display resolution of the organic light emitting display panel 200 is high. Whereas in the prior art, considering the limit of the exposure and etching processes of the electrode layer, while avoiding short circuit between the two electrodes, the closest distance between the two electrodes cannot be less than 5 μm, the present application can make the distance between the first and second electrodes 241 and 251 in the direction parallel to the planarization layer 210 substantially zero by providing the first insulating layer.
Exemplarily, in the present embodiment, the organic light emitting display panel is a top emission type organic light emitting display panel. The first and second electrodes 241 and 251 are anodes, and the second electrode 270 is a cathode. The anode is a total reflection electrode, the cathode is a semi-reflection and semi-transmission electrode, and a part of light emitted by the organic material layer 260 is directly emitted from the cathode, and a part of light is emitted from the cathode after being reflected by the total reflection anode.
Fig. 3 is a schematic process diagram of manufacturing an organic light emitting display panel 200 according to an embodiment of the invention.
As shown in fig. 3, in the embodiment of the present invention, the first methane electrode 241 is formed by patterning a first methane electrode layer, the second methane electrode 251 is formed by patterning a second methane electrode layer, and the second methane electrode layer is formed on the patterned first methane electrode layer.
In the embodiment of the invention, first, a first insulating layer 231 is formed on the planarization layer 210; then, a first nail electrode layer is formed on the first insulating layer 231 and the planarization layer 210 by deposition; then, a first nail electrode 241 is formed on the planarization layer 210 by patterning the first nail electrode layer; then, a second electrode layer is formed on the first insulating layer 231, the patterned first electrode layer, by deposition; then, a second electrode 251 is formed on the first insulating layer 231 by patterning the second electrode layer. The first nail electrode 241 is disposed on the planarization layer 210 after being formed by patterning the first nail electrode layer; the second electrode 251 is disposed on the first insulating layer 231 after being formed by patterning the second electrode layer; a first insulating layer 231 is disposed on the planarization layer 210; this electrically insulates the first and second electrodes 241, 251 and makes the distance between the first and second electrodes 241, 251 in the direction parallel to the planarization layer 210 substantially zero.
Fig. 4 is a schematic process diagram of manufacturing another organic light emitting display panel 200 according to an embodiment of the present invention.
As shown in fig. 4, in the embodiment of the present invention, the first and second electrodes 241 and 251 are formed by patterning the methyl electrode layer and etching the patterned methyl electrode layer.
In the embodiment of the invention, first, a first insulating layer 231 is formed on the planarization layer 210; then, a first insulating layer 231 and a planarization layer 210 are formed by deposition; then, a first a electrode 241 is formed on the planarization layer 210 and a second a electrode 251 is formed on the first insulating layer 231 by patterning the a electrode layer; then, the first and second electrodes 241 and 251 are separated by etching the patterned first and second electrode layers. The first a electrode 241 is disposed on the planarization layer 210 after being formed by patterning the a electrode layer and etching the patterned a electrode layer; the second electrode 251 is disposed on the first insulating layer 231 after being formed by patterning the first electrode layer and etching the patterned first electrode layer; a first insulating layer 231 is disposed on the planarization layer 210; this electrically insulates the first and second electrodes 241, 251 and makes the distance between the first and second electrodes 241, 251 in the direction parallel to the planarization layer 210 substantially zero.
As shown in fig. 2, in the embodiment of the present invention, the film thickness of the first insulating layer 231 is greater than that of the first a electrode 241.
In the embodiment of the present invention, the first organic light emitting region 240 and the second organic light emitting region 250 are adjacent to each other, the first electrode 241 is disposed on the planarization layer 210, the first insulating layer 231 is disposed on the planarization layer 210, and the second electrode 251 is disposed on the first insulating layer 231, when the film thickness of the first insulating layer 231 is greater than that of the first electrode 241, the first and second electrodes 241 and 251 are separated in a direction perpendicular to the planarization layer 210, so that the first and second electrodes 241 and 251 are electrically insulated, and the first and second electrodes 241 and 251 are electrically well insulated.
As shown in fig. 2, in the embodiment of the present invention, the film thickness of the first insulating layer 231 is greater than the film thickness of the first a electrode 241, and the difference between the film thickness of the first insulating layer 231 and the film thickness of the first a electrode 241 is greater than or equal to 0 nm and less than or equal to 50 nm.
In the embodiment of the invention, on the one hand, the difference between the film thickness of the first insulating layer 231 and the film thickness of the first electrode 241 is greater than or equal to 0 nm, the first and second electrodes 241, 251 do not overlap in the direction perpendicular to the planarization layer 210, and the first and second electrodes 241, 251 have better electrical insulation; on the other hand, the difference between the film thickness of the first insulating layer 231 and the film thickness of the first electrode 241 is 50 nm or less, the thickness of the first insulating layer 231 is not excessively large, and the thickness of the film layer in the second organic light emitting region 250 is not excessively large.
As shown in fig. 2, in the embodiment of the present invention, the first insulating layer 231 has a first inverted trapezoidal cross section including a first bottom side far from the planarization layer 210 and a second bottom side near the planarization layer 210, and a side length of the first bottom side is greater than a side length of the second bottom side.
In the embodiment of the present invention, the first insulating layer 231 has a first inverted trapezoidal section including a first base, a second base, a first oblique side, and a second oblique side, the first base and the second base being substantially parallel, the first oblique side and the second oblique side being between the first base and the second base; the first bevel edge and the second bevel edge are formed by etching with uneven etching rate, and when the etching is carried out, the etching rate near the first bottom edge is smaller, and the etching rate near the second bottom edge is larger; for example, the first insulating layer 231 may be prepared with a gradient concentration, such that during etching, due to the concentration difference, the etching speed of the first insulating layer 231 near the planarization layer 210 is relatively high, and in principle, the etching speed of the side of the planarization layer 210 is relatively low, such that an inverted trapezoidal profile is formed. After the first or second bottom electrode layer or the bottom electrode layer is deposited on the first insulating layer 231, the material of the first or second bottom electrode layer or the bottom electrode layer is not on the first or second oblique edge; the first oblique side or the second oblique side of the first inverted trapezoid-shaped cross section of the first insulating layer 231 is electrically insulated, so that the first and second electrodes 241, 251 are electrically insulated. Further, in order to ensure that the first and second electrodes 241 and 251 are electrically insulated, the adjacent edges of the first and second electrodes 241 and 251 may be further etched to ensure that they are electrically insulated.
As shown in fig. 2, in the embodiment of the present invention, the first inverted trapezoidal section includes a first oblique side and a second oblique side, an angle between the first oblique side and the first base is greater than or equal to 30 degrees and less than or equal to 50 degrees, and an angle between the second oblique side and the first base is greater than or equal to 30 degrees and less than or equal to 50 degrees.
In an embodiment of the invention, on the one hand, an included angle between the first oblique side and the first bottom side is less than or equal to 50 degrees and an included angle between the second oblique side and the first bottom side is less than or equal to 50 degrees, so that the first or second methane electrode layer or the material of the methane electrode layer is not deposited on the first or second oblique side; on the other hand, the included angle between the first oblique edge and the first bottom edge is greater than or equal to 30 degrees, and the included angle between the second oblique edge and the first bottom edge is greater than or equal to 30 degrees, so that the first oblique edge or the second oblique edge has enough strength and cannot collapse.
As shown in fig. 2, in the embodiment of the present invention, the pixel opening area 230 includes the first isolation pillar 232, the first isolation pillar 232 isolates the organic material layer 260 of the first organic light emitting area 240 from the organic material layer 260 of the second organic light emitting area 250, and the width of the first isolation pillar 232 in a direction parallel to the planarization layer 210 is greater than or equal to 1 micrometer and less than or equal to 5 micrometers.
In an embodiment of the invention, in one aspect, the width of the first isolation pillar 232 in a direction parallel to the planarization layer 210 is less than or equal to 5 micrometers, and the organic material layer 260 of the first organic light emitting region 240 and the first isolation pillar are
The organic material layer 260 of the second organic light emitting region 250 has a smaller pitch in a direction parallel to the planarization layer 210, so that the pixel aperture ratio of the pixel aperture area 230 is higher and the display resolution of the organic light emitting display panel 200 is higher; on the other hand, the width of the first isolation pillar 232 in the direction parallel to the planarization layer 210 is greater than or equal to 1 μm, so that the first isolation pillar 232 can isolate the organic material layer 260 of the first organic light emitting region 240 from the organic material layer 260 of the second organic light emitting region 250.
As shown in fig. 2, in the embodiment of the present invention, the first separator 232 is located between the first and second electrodes 241 and 251.
In the embodiment of the present invention, the first isolation column 232 not only isolates the organic material layer 260 of the first organic light emitting region 240 and the organic material layer 260 of the second organic light emitting region 250, but also isolates the first and second electrodes 241 and 251 between the first and second electrodes 241 and 251, so that the first and second electrodes 241 and 251 are better electrically insulated. The organic material layer 260 may be conductive to some extent due to its carrier transport capability. And thus, the first and second electrodes 241 and 251 cannot be completely insulated when the organic material layer 260 is directly formed after the formation of the two electrodes. The present embodiment provides the first isolation pillars 232 to isolate the organic material layer 260 using an inverted trapezoid design with a wide top and a narrow bottom similar to the first insulating layer 231. Fig. 5 is a schematic cross-sectional view of another organic light emitting display panel 200 according to an embodiment of the invention.
As shown in fig. 5, in the embodiment of the present invention, each pixel opening area 230 further includes a third organic light emitting area 280, and the third organic light emitting area 280 is adjacent to the first organic light emitting area 240 or adjacent to the second organic light emitting area 250;
the third organic light emitting region 280 includes a second insulating layer 233, a third electrode 281, an organic material layer 260, and a second electrode 270 sequentially disposed on the planarization layer 210;
the film thickness of the second insulating layer 233 is larger than that of the first insulating layer 231;
the third electrode 281 and the first electrode 241 are electrically insulated, and the third electrode 281 and the second electrode 251 are electrically insulated.
In the embodiment of the invention, when the third organic light-emitting region 280 is adjacent to the first organic light-emitting region 240, the third electrode 281 is disposed on the second insulating layer 233, the second insulating layer 233 is disposed on the planarization layer 210, and the first electrode 241 is disposed on the planarization layer 210, so that the third electrode 281 and the first electrode 241 are electrically insulated from each other, and the third organic light-emitting region 280 and the first organic light-emitting region 240 are prevented from interfering with each other; when the third organic light emitting region 280 is adjacent to the second organic light emitting region 250, the third electrode 281 is disposed on the second insulating layer 233, the second insulating layer 233 is disposed on the planarization layer 210, the second electrode 251 is disposed on the first insulating layer 231, the first insulating layer 231 is disposed on the planarization layer 210, and the second insulating layer 233 has a film thickness greater than that of the first insulating layer 231, so that the third electrode 281 and the second electrode 251 are electrically insulated from each other, and the third organic light emitting region 280 and the second organic light emitting region 250 are prevented from interfering with each other; in addition, the distance between the third and third electrodes 281 and 241 in the direction parallel to the planarization layer 210 is substantially zero, and the distance between the third and third electrodes 281 and 251 in the direction parallel to the planarization layer 210 is substantially zero, so that the pixel aperture ratio of the pixel aperture area 230 is high and the display resolution of the organic light emitting display panel 200 is high. In another embodiment of the present application, as shown in fig. 8, when an odd number of organic light emitting regions are included in one pixel opening area, when only the first organic light emitting region 240 and the second organic light emitting region 250 are disposed, the first organic light emitting region 240 and the first organic light emitting region 240 are adjacent or the second organic light emitting region 250 and the second organic light emitting region 250 are adjacent, such that the adjacent organic light emitting regions must be disposed with a larger distance to ensure electrical insulation. For example: if the third organic light emitting region 280 in fig. 8 is the first organic light emitting region 240, then there may be instances where the first organic light emitting region 240 is adjacent to the first organic light emitting region 240. Therefore, in the present embodiment, the third organic light emitting area and the second insulating layer 233 are disposed, and the film thickness of the second insulating layer 233 is greater than that of the first insulating layer 231, so that when the organic light emitting areas included in the same opening are odd, the distance between the organic light emitting areas in the direction parallel to the planarization layer 210 is substantially zero, thereby increasing the aperture ratio and improving the resolution.
Fig. 6 is a schematic plan view illustrating an organic light emitting display panel 200 according to an embodiment of the invention; fig. 7 is a schematic plan view of another organic light emitting display panel 200 according to an embodiment of the present invention; fig. 8 is a schematic plan view of another organic light emitting display panel 200 according to an embodiment of the present invention.
As shown in fig. 6, in the embodiment of the present invention, the pixel opening area 230 has a rectangular surface, the pixel opening area 230 includes two first organic light emitting areas 240 and two second organic light emitting areas 250, the first organic light emitting areas 240 have rectangular surfaces, the second organic light emitting areas 250 have rectangular surfaces, and the first organic light emitting areas 240 and the second organic light emitting areas 250 are alternately arranged.
As shown in fig. 7, in the embodiment of the present invention, the pixel opening area 230 has a hexagonal surface, the pixel opening area 230 includes three first organic light emitting areas 240 and three second organic light emitting areas 250, the first organic light emitting areas 240 have triangular surfaces, the second organic light emitting areas 250 have triangular surfaces, and the first organic light emitting areas 240 and the second organic light emitting areas 250 are alternately arranged.
As shown in fig. 8, in the embodiment of the present invention, the pixel opening area 230 has a triangular surface, the pixel opening area 230 includes a first organic light emitting area 240, a second organic light emitting area 250, and a third organic light emitting area 280, the first organic light emitting area 240 has a triangular surface, the second organic light emitting area 250 has a trapezoidal surface, and the third organic light emitting area 280 has a trapezoidal surface, and the first organic light emitting area 240, the second organic light emitting area 250, and the third organic light emitting area 280 are adjacently arranged.
Fig. 9 is a schematic cross-sectional view of another organic light emitting display panel 200 according to an embodiment of the invention.
As shown in fig. 9, in the embodiment of the present invention, the organic light emitting display panel 200 includes a pixel driving circuit including a storage capacitor 290; the storage capacitor 290 includes a first electrode 291, an insulating medium 292, and a second electrode 293, wherein the first electrode 291 is located between the second electrode 293 and the planarization layer 210, and the insulating medium 292 is located between the first electrode 291 and the second electrode 293; the projection of the second organic light emitting region 250 on the planarization layer 210 covers the projection of the first electrode 291 on the planarization layer 210.
In the embodiment of the present invention, the first electrode 291 of the storage capacitor 290 is disposed between the second organic light emitting region 250 and the substrate of the organic light emitting display panel 200, but not disposed between the first organic light emitting region 240 and the substrate of the organic light emitting display panel 200, the planarization layer 210 between the second organic light emitting region 250 and the storage capacitor 290 protrudes, and the first and second electrodes 241 and 251 have a larger distance in a direction perpendicular to the planarization layer 210, so that the first and second electrodes 241 and 251 are better electrically insulated.
In the embodiment of the present invention, the distance between the first and second electrodes 241 and 251 in the direction parallel to the planarization layer 210 is substantially equal to 0 nm; alternatively, the third and third electrodes 281 and 241 are substantially equal to 0 nm apart in the direction parallel to the planarization layer 210, and the third and third electrodes 281 and 251 are substantially equal to 0 nm apart in the direction parallel to the planarization layer 210. This makes the pixel aperture ratio of the pixel aperture area 230 high and the display resolution of the organic light emitting display panel 200 high.
Fig. 10 is a schematic plan view of an organic light emitting display device 300 according to an embodiment of the invention.
As shown in fig. 10, in an embodiment of the present invention, an organic light emitting display device 300 includes an organic light emitting display panel 200. The organic light emitting display device 300 is an electronic device such as a smart phone, a flat panel television, or the like. The organic light emitting display panel 200 is described above and will not be described in detail.
Fig. 11 is a flowchart illustrating a method 400 for fabricating an organic light emitting display panel according to an embodiment of the invention.
As shown in fig. 11 and 3, in an embodiment of the present invention, a method 400 of manufacturing an organic light emitting display panel includes:
step S401, forming a first insulating layer 231 on the planarization layer 210;
step S402, forming a first nail electrode layer on the first insulating layer 231 and the planarization layer 210 by deposition;
step S403, forming a first nail electrode 241 on the planarization layer 210 by patterning the first nail electrode layer;
step S404, forming a second electrode layer on the first insulating layer 231, the patterned first electrode layer by deposition;
in step S405, a second electrode 251 is formed on the first insulating layer 231 by patterning the second electrode layer.
The method 400 of manufacturing the organic light emitting display panel is used to manufacture the organic light emitting display panel 200.
In the embodiment of the invention, the first electrode 241 is formed on the planarization layer 210, the first insulating layer 231 is formed on the planarization layer 210, and the second electrode 251 is formed on the first insulating layer 231, so that the first electrode 241 and the second electrode 251 are electrically insulated, and the first organic light-emitting region 240 and the second organic light-emitting region 250 are prevented from interfering with each other; the first organic light emitting region 240 and the second organic light emitting region 250 are adjacent to each other, and the distance between the first and second electrodes 241 and 251 in the direction parallel to the planarization layer 210 is substantially zero, so that the pixel aperture ratio of the pixel aperture area 230 is high and the display resolution of the organic light emitting display panel 200 is high.
Fig. 12 is a flowchart illustrating another method 500 for fabricating an organic light emitting display panel according to an embodiment of the invention.
As shown in fig. 12, in an embodiment of the present invention, a method 500 for manufacturing an organic light emitting display panel includes:
step S501, forming a first insulating layer 231 on the planarization layer 210;
step S502, forming a first insulating layer 231 and a planarization layer 210 by deposition;
step S503, forming a first electrode 241 on the planarization layer 210 and a second electrode 251 on the first insulating layer 231 by patterning the first electrode layer;
in step S504, the first and second electrodes 241 and 251 are separated by etching the patterned first and second electrode layers.
The method 500 of manufacturing the organic light emitting display panel is used to manufacture the organic light emitting display panel 200.
In the embodiment of the invention, the first electrode 241 is formed on the planarization layer 210, the first insulating layer 231 is formed on the planarization layer 210, and the second electrode 251 is formed on the first insulating layer 231, so that the first electrode 241 and the second electrode 251 are electrically insulated, and the first organic light-emitting region 240 and the second organic light-emitting region 250 are prevented from interfering with each other; the first organic light emitting region 240 and the second organic light emitting region 250 are adjacent to each other, and the distance between the first and second electrodes 241 and 251 in the direction parallel to the planarization layer 210 is substantially zero, so that the pixel aperture ratio of the pixel aperture area 230 is high and the display resolution of the organic light emitting display panel 200 is high.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (15)
1. An organic light emitting display panel, comprising a planarization layer, a pixel defining layer on the planarization layer;
the pixel definition layer is provided with a plurality of pixel opening areas;
each of the pixel opening regions includes a first organic light emitting region and a second organic light emitting region adjacent to each other;
the first organic light-emitting region comprises a first electrode A, an organic material layer and a second electrode which are sequentially arranged on the planarization layer;
the second organic light-emitting region comprises a first insulating layer, a second electrode, the organic material layer and the second electrode which are sequentially arranged on the planarization layer;
the first electrode and the second electrode are electrically insulated;
the film thickness of the first insulating layer is larger than that of the first electrode;
the difference between the film thickness of the first insulating layer and the film thickness of the first electrode is not less than 0 nm and not more than 50 nm.
2. The organic light-emitting display panel according to claim 1, wherein the first methyl electrode is formed by patterning a first methyl electrode layer, and the second methyl electrode is formed by patterning a second methyl electrode layer formed on the patterned first methyl electrode layer.
3. The organic light-emitting display panel according to claim 1, wherein the first and second methyl electrodes are formed by patterning a methyl electrode layer and etching the patterned methyl electrode layer.
4. The organic light-emitting display panel according to claim 1, wherein the first insulating layer has a first inverted trapezoidal cross section including a first bottom side remote from the planarization layer and a second bottom side close to the planarization layer, and wherein a side length of the first bottom side is larger than a side length of the second bottom side.
5. The organic light-emitting display panel according to claim 4, wherein the first inverted trapezoidal section includes a first oblique side and a second oblique side, an angle between the first oblique side and the first base is equal to or greater than 30 degrees and equal to or less than 50 degrees, and an angle between the second oblique side and the first base is equal to or greater than 30 degrees and equal to or less than 50 degrees.
6. The organic light-emitting display panel according to claim 1, wherein the pixel opening region includes a first spacer pillar that separates the organic material layer of the first organic light-emitting region from the organic material layer of the second organic light-emitting region, and a width of the first spacer pillar in a direction parallel to the planarization layer is 1 micron or more and 5 microns or less.
7. The organic light-emitting display panel according to claim 6, wherein the first separator is located between the first and second first electrodes.
8. The organic light-emitting display panel according to claim 1, wherein each of the pixel opening regions further comprises a third organic light-emitting region which is adjacent to the first organic light-emitting region or adjacent to the second organic light-emitting region;
the third organic light emitting region comprises a second insulating layer, a third electrode, the organic material layer and the second electrode which are sequentially arranged on the planarization layer;
the film thickness of the second insulating layer is larger than that of the first insulating layer;
the third electrode and the first electrode are electrically insulated, and the third electrode and the second electrode are electrically insulated.
9. The organic light-emitting display panel according to claim 1, wherein the organic light-emitting display panel comprises a pixel driving circuit including a storage capacitor;
the storage capacitor comprises a first electrode, an insulating medium and a second electrode, wherein the first electrode is positioned between the second electrode and the planarization layer, and the insulating medium is positioned between the first electrode and the second electrode;
the projection of the second organic light emitting region on the planarization layer covers the projection of the first electrode on the planarization layer.
10. The organic light-emitting display panel according to any one of claims 1 to 7 and 9, wherein a distance between the first and second electrodes in a direction parallel to the planarization layer is substantially equal to 0 nm.
11. The organic light-emitting display panel according to claim 8, wherein a distance between the first and second electrodes in a direction parallel to the planarization layer is substantially equal to 0 nm;
alternatively, the third electrode and the first electrode are spaced apart by 0 nm in a direction parallel to the planarization layer, and the third electrode and the second electrode are spaced apart by 0 nm in a direction parallel to the planarization layer.
12. An organic light emitting display device, characterized in that the organic light emitting display device comprises the organic light emitting display panel according to any one of claims 1 to 11.
13. A manufacturing method of the organic light emitting display panel according to claim 1, characterized in that the manufacturing method comprises:
forming the first insulating layer on the planarization layer;
forming a first methyl electrode layer on the first insulating layer and the planarization layer by deposition;
forming the first electrode on the planarization layer by patterning the first electrode layer, wherein a film thickness of the first insulating layer is greater than a film thickness of the first electrode, and a difference between the film thickness of the first insulating layer and the film thickness of the first electrode is 0 nm or more and 50 nm or less;
forming a second electrode layer on the first insulating layer, the patterned first electrode layer, by deposition;
forming the second electrode on the first insulating layer by patterning the second electrode layer.
14. A manufacturing method of the organic light emitting display panel according to claim 1, characterized in that the manufacturing method comprises:
forming the first insulating layer on the planarization layer;
forming a first insulating layer on the first substrate;
forming the first electrode on the planarization layer and the second electrode on the first insulating layer by patterning the first electrode layer, wherein a film thickness of the first insulating layer is larger than a film thickness of the first electrode, and a difference between the film thickness of the first insulating layer and the film thickness of the first electrode is 0 nm or more and 50 nm or less;
and separating the first and second electrodes by etching the patterned first and second electrode layers.
15. The manufacturing method according to claim 13 or 14, wherein a distance between the first and second electrodes in a direction parallel to the planarization layer is substantially equal to 0 nm.
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