Patent Description:
Due to a series of excellent characteristics such as self-luminescence, high contrast, wide viewing angle, low power consumption, fast response speed, and low manufacturing cost, the organic light-emitting device as a basis of a new-generation display device, has received more and more attention.

The encapsulation property of the organic light-emitting display substrate is a problem that restricts large-scale application of the organic light-emitting display device.

<CIT> provides a display panel including a plurality of display elements arranged in a display area, an opening, a multi-layer including a first layer and a second layer disposed on the first layer, and a groove. Each display element includes a pixel electrode, an emission layer disposed on the pixel electrode, and an opposite electrode disposed on the emission layer. The display area surrounds the opening. The groove is located between the opening and the display area. The groove has an undercut cross-section that is concave in a thickness direction of the multi-layer, the second layer includes a pair of tips that protrude toward a center of the groove, and a length of each tip is less than about <NUM>.

<CIT> provides an electroluminescent display panel and a preparation method thereof and an electroluminescent display device. The display substrate comprises an underlying substrate; an electroluminescent device arranged on the underlying substrate, wherein the electroluminescent device comprises a first electrode layer, a light-emitting layer and a second electrode layer which are sequentially arranged on the underlying substrate; a packaging layer which is arranged on the underlying substrate and covers the electroluminescent device; a hole which at least penetrates through the packaging layer; and at least one eave structure arranged on the underlying substrate, wherein at least one eave structure surrounds the hole and is located between the hole and the electroluminescent device, each eave structure comprises at least one bottom notch located at the end close to the underlying substrate of the eave structure, and at least one of the light-emitting layer and the second electrode layer is disconnected on at least one bottom notch.

According to one aspect of the claimed invention, provided is an organic light-emitting display substrate comprising a display area and a non-display area surrounding the display area, the display area comprising at least one opening penetrating through the organic light-emitting display substrate, the organic light-emitting display substrate comprising: a substrate; an organic layer located on one side of the substrate; a first inorganic layer located on one side of the organic layer away from the substrate, wherein an overall structure of the first inorganic layer and the organic layer has at least one annular partition groove corresponding to each of the at least one opening, the at least one annular partition groove surrounds a periphery of the each of the at least one opening and extends into the organic layer towards the substrate, and a width of an orthographic projection of a notch of each of the at least one annular partition groove on the substrate is smaller than a width of an orthographic projection of the each of the at least one annular partition groove on the substrate; an anode layer located on one side of the first inorganic layer away from the substrate, and comprising a plurality of anodes and an annular covering portion corresponding to each of the at least one annular partition groove, wherein the annular covering portion at least covers a bottom wall and two side walls of a annular partition groove of the at least one annular partition groove corresponding to the annular covering portion; and an organic functional layer located on one side of the anode layer away from the substrate, and comprising a first organic functional material portion located outside the at least one annular partition groove, and a second organic functional material portion located inside the at least one annular partition groove and not connected to the first organic functional material portion, wherein a material of the annular covering portion is the same as a material of the plurality of anodes.

In some embodiments, an outer edge of an orthographic projection of the annular covering portion on the substrate is located outside an outer edge of the orthographic projection of the notch of the annular partition groove on the substrate.

In some embodiments, an inner edge of the orthographic projection of the annular covering portion on the substrate is located inside an inner edge of the orthographic projection of the notch of the annular partition groove on the substrate.

In some embodiments, each of the two side walls of the annular partition groove comprises: a first side wall portion extending along a side surface of the first inorganic layer, wherein the notch of the annular partition groove is enclosed by the first side wall portion; a second sidewall portion extending along a surface of the first inorganic layer close to the organic layer and not in contact with a surface of the organic layer; and a third side wall portion extending along a side surface of the organic layer.

In some embodiments, a distance between an outer edge and an inner edge of the orthographic projection of each of the at least one annular partition groove on the substrate is <NUM> microns to <NUM> microns.

In some embodiments, a maximum depth of a portion of each of the at least one annular partition groove located in the organic layer is <NUM> micrometers to <NUM> micrometers.

In some embodiments, an angle between the bottom wall of the annular partition groove and the third side wall portion is <NUM> degrees to <NUM> degrees.

In some embodiments, a distance between an outer edge and an inner edge of an orthographic projection of the second side wall portion of the annular partition groove on the substrate is <NUM> micrometer to <NUM> micrometer.

In some embodiments, the organic layer comprises a first organic layer and a second organic layer sequentially arranged along a direction away from the substrate, and the organic light-emitting display substrate further comprises: a semiconductor layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, a third insulating layer, a first data metal layer and a second inorganic layer which are located between the substrate and the first organic layer and sequentially arranged along the direction away from the substrate; a second data metal layer located between the first organic layer and the second organic layer; a pixel defining layer and a spacer layer which are located between the anode layer and the organic functional layer and sequentially arranged along the direction away from the substrate; and a cathode layer and an encapsulation layer which are located on one side of the organic functional layer away from the substrate and sequentially arranged along the direction away from the substrate, the cathode layer comprising a first cathode material portion located outside the at least one annular partition groove, and a second cathode material portion located inside the at least one annular partition groove and not connected to the first cathode material portion, wherein the first data metal layer is connected to the semiconductor layer through a plurality of first via holes, and connected to the second data metal layer through a plurality of second via holes, and the second data metal layer is connected to the anode layer through a plurality of third via holes.

In some embodiments, an edge of the organic layer close to an opening of the at least one opening and an edge of the opening are provided with a distance therebetween; and the first inorganic layer comprises a portion surrounding the periphery of the opening and in contact with the second inorganic layer.

In some embodiments, a distance between an edge of the first organic layer close to the opening and the edge of the opening is smaller than a distance between an edge of the second organic layer close to the opening and the edge of the opening.

In some embodiments, the at least one annular partition groove penetrates through the second organic layer and extends into the first organic layer; or the at least one annular partition groove extends into of the second organic layer; or the at least one annular partition groove extends into the second organic layer and the first organic layer.

In some embodiments, a height of one of the two side walls of the annular partition groove which is further away from the at least one opening is greater than a height of the other of the two side walls which is closer to the at least one opening.

In some embodiments, the display area comprises at least one curved portion, each of the at least one curved portion comprising: a plurality of openings; a plurality of island areas, each of the plurality of island areas comprising an organic light-emitting device, a thin film transistor device, a capacitor device and a plurality of electrode structures located at the second data metal layer, and each of the plurality of anodes is connected to one of the plurality of electrode structures through one of the plurality of third via holes; and a bridge area connected to the plurality of island areas and comprising at least one of a plurality of first traces located at the first data metal layer or a plurality of second traces located at the second data metal layer.

In some embodiments, the display area is substantially in a shape of rectangular; and the at least one curved portion comprises four curved portions which are distributed at four corners of the display area.

In some embodiments, the substrate comprises a first organic flexible layer, a second organic flexible layer, and a first inorganic barrier layer located between the first organic flexible layer and the second organic flexible layer.

In some embodiments, the substrate further comprises a second organic flexible layer and an inorganic barrier layer, which are located on one side of the second organic flexible layer away from the first inorganic barrier layer and sequentially arranged along a direction away from the first inorganic barrier layer.

According to another aspect of the embodiments of the present disclosure, provided is an organic light-emitting display device, comprising the organic light-emitting display substrate according to any one of the above embodiments.

According to still another aspect of the embodiments of the claimed invention, provided is a manufacturing method of an organic light-emitting display substrate comprising a display area and a non-display area surrounding the display area, the display area comprising at least one opening penetrating through the organic light-emitting display substrate, the manufacturing method comprising: forming an organic layer on one side of a substrate; forming a first inorganic layer located on one side of the organic layer away from the substrate; etching an overall structure of the first inorganic layer and the organic layer to form at least one annular partition groove corresponding to each of the at least one opening, wherein the at least one annular partition groove surrounds a periphery of the each of the at least one opening and extends into the organic layer towards the substrate, and a width of an orthographic projection of a notch of each of the at least one annular partition groove on the substrate is smaller than a width of an orthographic projection of the each of the at least one annular partition groove on the substrate; forming an anode layer on one side of the first inorganic layer away from the substrate, wherein the anode layer comprises a plurality of anodes and an annular covering portion corresponding to each of the at least one annular partition groove, wherein the annular covering portion at least covers a bottom wall and two side walls of a annular partition groove of the at least one annular partition groove and a material of the annular covering portion is the same as a material of the plurality of anodes; corresponding to the annular covering portion; and forming an organic functional layer on one side of the anode layer away from the substrate, the organic functional layer comprising a first organic functional material portion located outside the at least one annular partition groove, and a second organic functional material portion located inside the at least one annular partition groove and not connected to the first organic functional material portion.

In some embodiments, an outer edge of an orthographic projection of the annular covering portion on the substrate is located outside an outer edge of the orthographic projection of the notch of the annular partition groove on the substrate; and an inner edge of the orthographic projection of the annular covering portion on the substrate is located inside an inner edge of the orthographic projection of the notch of the annular partition groove on the substrate.

In some embodiments, the organic layer comprises a first organic layer and a second organic layer sequentially arranged along a direction away from the substrate, and the manufacturing method further comprises: forming a semiconductor layer, a first insulating layer, a first gate metal layer, a second insulating layer, a second gate metal layer, a third insulating layer, a first data metal layer and a second inorganic layer sequentially on the one side of the substrate, before forming the first organic layer; forming a second data metal layer on one side of the first organic layer away from the substrate, after forming the first organic layer, and before forming the second organic layer; forming a pixel defining layer and a spacer layer sequentially on the one side of the anode layer away from the substrate, after forming the anode layer, and before forming the organic functional layer; and forming a cathode layer and an encapsulation layer sequentially on one side of the organic functional layer away from the substrate, after forming the organic functional layer, the cathode layer comprising a first cathode material portion located outside the at least one annular partition groove, and a second cathode material portion located inside the at least one annular partition groove and not connected to the first cathode material portion, wherein the first data metal layer is connected to the semiconductor layer through a plurality of first via holes, and connected to the second data metal layer through a plurality of second via holes, and the second data metal layer is connected to the anode layer through a plurality of third via holes.

In some embodiments, the manufacturing method further comprises forming the at least one opening by dry etching, after forming the first inorganic layer.

The accompanying drawings, which constitute part of this specification, illustrate exemplary embodiments of the present disclosure and, together with this specification, serve to explain the principles of the present disclosure.

The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:.

It should be understood that the dimensions of the various parts shown in the accompanying drawings are not necessarily drawn according to the actual scale. In addition, the same or similar reference signs are used to denote the same or similar components.

Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The following description of the exemplary embodiments is merely illustrative and is in no way intended as a limitation to the present disclosure, its application or use. The present disclosure may be implemented in many different forms, which are not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete, and fully convey the scope of the present disclosure to those skilled in the art. It should be noticed that: relative arrangement of components and steps, material composition, numerical expressions, and numerical values set forth in these embodiments, unless specifically stated otherwise, should be explained as merely illustrative, and not as a limitation.

The use of the terms "first", "second" and similar words in the present disclosure do not denote any order, quantity or importance, but are merely used to distinguish between different parts. A word such as "comprise", "have" or variants thereof means that the element before the word covers the element(s) listed after the word without excluding the possibility of also covering other elements. The terms "up", "down", or the like are used only to represent a relative positional relationship, and the relative positional relationship may be changed correspondingly if the absolute position of the described object changes.

In the present disclosure, when it is described that a specific component is disposed between a first component and a second component, there may be an intervening component between the specific component and the first component or between the specific component and the second component. When it is described that a specific part is connected to other parts, the specific part may be directly connected to the other parts without an intervening part, or not directly connected to the other parts with an intervening part.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as the meanings commonly understood by one of ordinary skill in the art to which the present disclosure belongs. It should also be understood that terms as defined in general dictionaries, unless explicitly defined herein, should be interpreted as having meanings that are consistent with their meanings in the context of the relevant art, and not to be interpreted in an idealized or extremely formalized sense.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, these techniques, methods, and apparatuses should be considered as part of this specification.

With the characteristics of small weight, small thinness and flexibility, the organic light-emitting display substrate is widely applied in a flexible display device. An organic light-emitting display substrate in the related art comprises a plurality of openings, a plurality of island areas, and a bridge area connected to the plurality of island areas. The island area is provided with an organic light-emitting device, and the bridge area is provided with a trace. The organic light-emitting display substrate which uses a flexible substrate supplemented by an opening design, may realize curved display, flexible display or tensile display.

The moisture and oxygen in the air are main factors affecting the service life of the organic light-emitting display substrate. How to prevent the moisture and oxygen from entering an interior of the organic light-emitting display substrate from the openings, improve the encapsulation property of the organic light-emitting display substrate, and prolong the service life of the organic light-emitting display substrate is an urgent technical problem to be solved by those skilled in the art.

In order to solve the above technical problem, the embodiments of the present disclosure provide an organic light-emitting display substrate and a manufacturing method thereof, and an organic light-emitting display device.

As shown in <FIG>, <FIG>, the organic light-emitting display substrate <NUM> provided by an embodiment of the present disclosure comprises a display area <NUM> and a non-display area <NUM> surrounding the display area <NUM>. The display area <NUM> comprises at least one opening <NUM> penetrating through the organic light-emitting display substrate <NUM>. The organic light-emitting display substrate <NUM> comprises a substrate <NUM>, an organic layer <NUM> located on one side of the substrate <NUM>, a first inorganic layer <NUM> located on one side of the organic layer <NUM> away from the substrate <NUM>, an anode layer <NUM> located on one side of the first inorganic layer <NUM> away from the substrate <NUM>, and an organic functional layer <NUM> located on one side of the anode layer <NUM> away from the substrate <NUM>.

The overall structure of the first inorganic layer <NUM> and the organic layer <NUM> has at least one annular partition groove <NUM> corresponding to each opening <NUM>. The annular partition groove <NUM> surrounds a periphery of the opening <NUM> and extends into the organic layer <NUM> along a direction close to the substrate <NUM>. The width t of the orthographic projection of a notch 60c of the annular partition groove <NUM> on the substrate <NUM> is smaller than the width c of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>.

The anode layer <NUM> comprises a plurality of anodes <NUM> and an annular covering portion <NUM> corresponding to each annular partition groove <NUM>. The annular covering portion <NUM> at least covers a bottom wall 60a and two side walls 60b of an annular partition groove <NUM> corresponding to the annular covering portion <NUM>.

The organic functional layer <NUM> comprises a first organic functional material portion <NUM> located outside the annular partition groove <NUM> and a second organic functional material portion <NUM> located inside the annular partition groove <NUM>. The first organic functional material portion <NUM> and the second organic functional material portion <NUM> are not connected to each other by being partitioned by the annular partition groove <NUM>.

In the embodiments of the present disclosure, the first inorganic layer <NUM> is located on one side of the organic layer <NUM> away from the substrate <NUM>. It should be understood that the overall pattern layer of the first inorganic layer <NUM> is located on one side of the overall pattern layer of the organic layer <NUM> away from the substrate <NUM>. It should not be understood as an absolute positional relationship of a partial structure. The positional relationship between other pattern layers is similar to this, and thus will not be described in detail here.

The substrate <NUM> may be a flexible substrate or a rigid substrate. In the embodiments shown in <FIG> and <FIG>, the substrate <NUM> is a flexible substrate, and the display area <NUM> comprises at least one curved portion <NUM>. Each curved portion <NUM> comprises a plurality of openings <NUM>, a plurality of island areas <NUM>, and a bridge area <NUM> connected to the plurality of island areas <NUM>. It should be understood that, the plurality of openings <NUM> are defined by the plurality of island areas <NUM> and the bridge area <NUM>. The island area <NUM> is provided with an organic light-emitting device <NUM>, a thin film transistor device <NUM> and a capacitor device <NUM>, and the bridge area <NUM> is provided with a trace. As shown in <FIG>, the display area <NUM> is substantially in a shape of rectangular and comprises four curved portions <NUM> distributed at four corners of the display area <NUM>. The organic light-emitting display substrate <NUM> uses a flexible substrate, and the curved portion <NUM> is designed with openings that penetrate through the organic light-emitting display substrate <NUM>, which make the bent portion <NUM> more easily be bent, thereby making the organic light-emitting display device present a more prominent curved display effect. It should be understood that the specific patterns of the island area <NUM>, the bridge area <NUM> and the opening <NUM> of the curved portion <NUM> are not limited to those shown.

As shown in <FIG>, in other embodiments of the present disclosure, the display area <NUM> comprises one opening <NUM> that penetrates through the organic light-emitting display substrate <NUM>. The opening <NUM> is configured to accommodate a functional device such as a camera or sensor of the display device. The shape of the opening <NUM> is not limited, and for example, is a circle, an ellipse, a rectangle, or a polygon.

In still other embodiments of the present disclosure, the display area may also comprise a plurality of openings penetrating through the organic light-emitting display substrate, a plurality of island areas, and a bridge area connected to the plurality of island areas. The plurality of openings and the plurality of islands areas are substantially evenly distributed in the display area. The island area is provided with an organic light-emitting device, a thin film transistor device and a capacitor device, and the bridge area is provided with a trace. The display device comprising such an organic light-emitting display substrate can realize curved display, flexible display or tensile display.

As shown in <FIG>, in some embodiments, the organic layer <NUM> comprises a first organic layer <NUM> and a second organic layer <NUM> that are sequentially arranged along a direction away from the substrate <NUM>. The organic light-emitting display substrate further comprises: a semiconductor layer <NUM>, a first insulating layer <NUM>, a first gate metal layer <NUM>, a second insulating layer <NUM>, a second gate metal layer <NUM>, a third insulating layer <NUM>, a first data metal layer <NUM>, and a second inorganic layer <NUM> which are located between the substrate <NUM> and the first organic layer <NUM> and sequentially arranged along the direction away from the substrate <NUM>; a second data metal layer <NUM> located between the first organic layer <NUM> and the second organic layer <NUM>; and a pixel defining layer <NUM> and a spacer layer <NUM> which are located between the anode layer <NUM> and the organic functional layer <NUM> and sequentially arranged along the direction away from the substrate <NUM>; and a cathode layer <NUM> and an encapsulation layer <NUM> which are located on one side of the organic functional layer <NUM> away from the substrate <NUM> and sequentially arranged along the direction away from the substrate <NUM>. The cathode layer <NUM> comprises a first cathode material portion <NUM> located outside the annular partition groove <NUM> and a second cathode material portion <NUM> located inside the annular partition groove <NUM>. The first cathode material portion <NUM> and the second cathode material portion <NUM> are not connected to each other by being partitioned by the annular partition groove <NUM>. The first data metal layer <NUM> is connected to the semiconductor layer <NUM> through a plurality of first via holes 6b and connected to the second data metal layer <NUM> through a plurality of second via holes 6c. The second data metal layer <NUM> is connected to the anode layer <NUM> through a plurality of third via holes 6a.

As shown in <FIG>, in some embodiments of the present disclosure, the annular partition groove <NUM> penetrates through a partial thickness of the second organic layer <NUM>. As shown in <FIG>, in other embodiments of the present disclosure, the annular partition groove <NUM> penetrates through the second organic layer <NUM> and a partial thickness of the first organic layer <NUM>. In still other embodiments of the present disclosure, the annular partition groove <NUM> may also penetrate through the second organic layer and the first organic layer.

The thin film transistor device <NUM> comprises an active layer located at the semiconductor layer <NUM>, a gate located at the first gate metal layer <NUM>, and a source and drain located at the first data metal layer <NUM>. The source and drain are each connected to the active layer through a first via hole 6b. The capacitor device <NUM> comprises a first electrode plate located at the first gate metal layer <NUM> and a second electrode plate located at the second gate metal layer <NUM>. The organic light-emitting device <NUM> comprises an anode <NUM>, a portion of the organic functional layer <NUM> directly opposite to the anode <NUM>, and a portion of the cathode layer <NUM> directly opposite to the anode <NUM>.

As shown in <FIG>, the bridge area <NUM> comprises a plurality of first traces <NUM> located at the first data metal layer <NUM> and a plurality of second traces <NUM> located at the second data metal layer <NUM>. The island area <NUM> comprises a plurality of electrode structures <NUM> located at the second data metal layer <NUM>. In the island area <NUM>, the source and drain of the thin film transistor device <NUM> are each connected to one electrode structure <NUM> through one second via hole 6c, and the anode <NUM> of each organic light-emitting device <NUM> is connected to one electrode structure <NUM> through one third via hole 6a. The organic light-emitting display substrate <NUM> of this embodiment is designed with a double-layer trace, which is equivalent to connection of resistors in parallel. This may reduce the trace resistance and lower the power consumption of the organic light-emitting display substrate <NUM>.

As shown in <FIG>, an edge of the organic layer <NUM> close to the opening <NUM> and an edge of the opening <NUM> are provided with a distance k1 therebetween. The first inorganic layer <NUM> and the second inorganic layer <NUM> both extend to the edge of the opening <NUM>. The first inorganic layer <NUM> comprises a portion surrounding the periphery of the opening <NUM> and in contact with the second inorganic layer <NUM>. That is, the first inorganic layer <NUM> is in contact with the second inorganic layer <NUM> at the edge close to the opening <NUM>. Since the organic material has a permeability of moisture and oxygen greater than that of the inorganic material, with the first inorganic layer <NUM> covering the organic layer <NUM> near the edge of the opening <NUM>, the probability of moisture and oxygen entering an interior of the substrate from the organic layer <NUM> is greatly reduced.

In addition, in some embodiments, the distance k1 between an edge of the first organic layer <NUM> close to the opening <NUM> and the edge of the opening <NUM> is smaller than the distance k2 between an edge of the second organic layer <NUM> close to the opening <NUM> and the edge of the opening <NUM>. In this way, the first organic layer <NUM> and the second organic layer <NUM> form a stepped structure at a location close to the opening <NUM>, which is favorable for improving the thickness uniform of the first inorganic layer <NUM> close to the opening <NUM>, thereby improving the encapsulation property of the first inorganic layer <NUM> over the organic layer <NUM>.

As shown in <FIG>, in some embodiments, the substrate <NUM> is a flexible substrate comprising a first organic flexible layer <NUM>, a second organic flexible layer <NUM>, and a first inorganic barrier layer <NUM> located between the first organic flexible layer <NUM> and the second organic flexible layer <NUM>. The materials of the first organic flexible layer <NUM> and the second organic flexible layer <NUM> comprise polyimide, and the material of the first inorganic barrier layer <NUM> comprises at least one of silicon nitride or silicon oxide. Such a design may not only improve the toughness of the substrate <NUM>, but also facilitate improving the encapsulation property of the organic light-emitting display substrate <NUM>.

As shown in <FIG>, in some embodiments, the substrate <NUM> further comprises a second inorganic barrier layer <NUM> and an inorganic buffer layer <NUM> located on one side of the second organic flexible layer <NUM> away from the first inorganic barrier layer <NUM>, and sequentially arranged along a direction away from the first inorganic barrier layer <NUM>. The materials of the second inorganic barrier layer <NUM> and the inorganic buffer layer <NUM> comprise at least one of silicon nitride or silicon oxide. The second inorganic barrier layer <NUM> and the inorganic buffer layer <NUM> can prevent impurity particles in the organic flexible layers from entering the semiconductor layer <NUM> to affect the property of the thin film transistor device <NUM>.

In the embodiments of the present disclosure, the organic functional layer <NUM> comprises a light-emitting layer and at least one of a hole injection layer, an electron injection layer, a hole transport layer, an electron transport layer, an electron blocking layer, or a hole blocking layer. The organic functional layer <NUM> and the cathode layer <NUM> of the organic light-emitting display substrate <NUM> are usually formed by using an evaporation process. The evaporation process means that an evaporation material is heated under a certain vacuum condition to melt or sublime into water vapor constituted by atoms, molecules or atomic groups, which will then condensate on a surface of a substrate to form a film. During the evaporation process, the evaporation material substantially forms a film along a normal direction of the substrate. The organic functional layer and the cathode layer may be formed by evaporation over a large area or formed by patterned evaporation using a mask plate.

As shown in <FIG>, in the embodiments of the present disclosure, the width t of the orthographic projection of the notch 60c of the annular partition groove <NUM> on the substrate <NUM> is smaller than the width c of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>. That is, the annular partition groove <NUM> has an undercut structure. In this way, as shown in <FIG>, the evaporation material is prevented from continuously forming a film on the side wall 60b of the annular partition groove <NUM>, and thus the film is not connected on both sides of the annular partition groove <NUM>. In some embodiments of the present disclosure, as shown in <FIG>, the organic functional layer <NUM> and the cathode layer <NUM> are formed by evaporation over a large area and not connected on both sides of the annular partition groove <NUM>. After the organic light-emitting display substrate <NUM> is encapsulated by using a thin film encapsulation technology, since the organic functional layer <NUM> is not connected on both sides of the annular partition groove <NUM>, which is equivalent to cutting off a passage along which the moisture and oxygen enter an interior of the organic light-emitting display substrate <NUM> from an edge of the opening <NUM> along the organic functional layer <NUM>. Therefore, it is possible to effectively improve the encapsulation property and prolong the service life of the organic light-emitting display substrate <NUM>.

The annular partition groove <NUM> is disposed around the periphery of the opening <NUM>. The number of the annular partition grooves <NUM> is not limited, for example, may be one, or at least two sequentially arranged along a direction away from the edge of the opening <NUM>.

As mentioned above, with the first inorganic layer <NUM> covering the organic layer <NUM>, it is possible to greatly reduce the probability of moisture and oxygen entering an interior of the substrate from the organic layer <NUM>. However, the inventors of the present disclosure have found during the process of implementing the embodiments of the present disclosure that, once the first inorganic layer <NUM> fails to be encapsulated at the edge of the opening <NUM>, for example, broken, it is likely to cause water vapor easily to enter a slit between the first inorganic layer <NUM> and the organic layer <NUM>.

To solve this problem, in the embodiments of the present disclosure, the anode layer <NUM> comprises an annular covering portion <NUM> corresponding to each annular partition groove <NUM>. The annular covering portion <NUM> at least covers the bottom wall 60a and two side walls 60b of the annular partition groove <NUM>. As shown in <FIG>, when the first inorganic layer <NUM> fails to be encapsulated at the edge of the opening <NUM>, the path the water vapor enters may end at the end of the dotted line shown. This is because the annular covering portion <NUM> uses the same inorganic material as the anode <NUM>, and the contact surface between the two inorganic materials of the annular covering portion <NUM> and the first inorganic layer <NUM> can effectively block the entry of water vapor. Therefore, the structural design of the organic light-emitting display substrate <NUM> of the embodiments of the present disclosure can effectively prevent the entry of water vapor caused by the failure of the encapsulation of the first inorganic layer <NUM>, thereby prolonging the service life of the organic light-emitting display substrate <NUM>.

The specific material of the anode layer <NUM> is not limited. In some embodiments, the anode layer <NUM> comprises a first indium tin oxide layer, a second indium tin oxide layer, and a silver layer sandwiched between the first indium tin oxide layer and the second indium tin oxide layer. The thicknesses of the first indium tin oxide layer and the second indium tin oxide layer are <NUM> angstroms to <NUM> angstroms, for example <NUM> angstroms. The thickness of the silver layer is <NUM> angstroms to <NUM> angstroms, for example <NUM> angstroms. For example, the anode layer <NUM> is formed by patterning a film, by wet etching, which is formed by using a sputtering process.

In some embodiments of the present disclosure, as shown in <FIG>, the annular covering portion <NUM> not only covers the bottom wall 60a and the two side walls 60b of the annular partition groove <NUM>, but also covers a part of a surface of the first inorganic layer <NUM>. The outer edge of the orthographic projection of the annular covering portion <NUM> on the substrate <NUM> is located outside the outer edge of an orthographic projection of the notch 60c of the annular partition groove <NUM> on the substrate <NUM>. Such a design makes the design and manufacturing process of the anode layer pattern more convenient and easy to implement on one hand, and increases a contact area of the two inorganic materials of the annular covering portion <NUM> and the first inorganic layer <NUM> on one side of the annular partition groove <NUM> close to the organic light-emitting device <NUM> on the other hand, thereby further ensuring a blocking effect on water vapor.

In other embodiments of the present disclosure, the outer edge of the orthographic projection of the annular covering portion <NUM> on the substrate <NUM> is located outside the outer edge of the orthographic projection of the notch 60c of the annular partition groove <NUM> on the substrate <NUM>, and the inner edge of the orthographic projection of the annular covering portion <NUM> on the substrate <NUM> is located inside the inner edge of the orthographic projection of the notch 60c of the annular partition groove <NUM> on the substrate <NUM>. This design even further simplifies the design and manufacturing process of the anode layer pattern whilst ensuring the effect blocking on the water vapor, thereby facilitating reducing the manufacturing cost.

As shown in <FIG>, in some embodiments of the present disclosure, each of the two side walls 60b of the annular partition groove <NUM> comprises a first side wall portion 601b extending along a side surface of the first inorganic layer <NUM> (i.e., a section formed by etching the first inorganic layer <NUM>), wherein the notch 60c of the annular partition groove <NUM> is enclosed by the first side wall portion 601b; a second sidewall portion 602b extending along a surface of the first inorganic layer <NUM> close to the organic layer <NUM> and not in contact with a surface of the organic layer <NUM>; and a third sidewall portion 603b extending along a side surface of the organic layer <NUM> (i.e., a section formed by etching the organic layer <NUM>). Since the materials of the first inorganic layer <NUM> and the organic layer <NUM> are quite different, an appropriate selection ratio may be selected to dry etch the first inorganic layer <NUM> and the organic layer <NUM> to form an undercut-like structure as shown on one side of the first inorganic layer <NUM> close to the organic layer <NUM>. Due to the structural characteristics of the annular partition groove <NUM>, the thickness f1 of a part of the annular covering portion <NUM>, which is formed by wet etching a film formed by using a sputtering process, in contact with the surface of the first inorganic layer <NUM> close to the organic layer <NUM> is slightly smaller than the thickness f2 of the other part of the annular covering portion <NUM>.

In some embodiments, the width c of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>, that is, the distance c between the outer edge and the inner edge of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>, is <NUM> microns to <NUM> microns. The maximum depth d of a portion of the annular partition groove <NUM> located in the organic layer <NUM> is <NUM> microns to <NUM> microns. The angle α between the bottom wall 60a of the annular partition groove <NUM> and any one third side wall portion 603b is <NUM>° to <NUM>°. The distance s between the outer edge and the inner edge of the orthographic projection of any one second side wall portion 602b of the annular partition groove <NUM> on the substrate <NUM> is <NUM> micron to <NUM> micron.

The heights of the two side walls 60b of the annular partition groove <NUM> may be the same or different, which is related to a thickness change of the organic layer <NUM>. As shown in <FIG>, in some embodiments of the present disclosure, after the manufacture of the organic layer <NUM> is completed, the thickness of the organic layer <NUM> in the vicinity of the opening <NUM> gradually becomes thinner. Among the two side walls 60b of the annular partition groove <NUM>, the height h1 of the side wall 60b which is further away from the opening <NUM> is greater than the height h2 of the side wall 60b which is closer to the opening <NUM>.

As shown in <FIG> and <FIG>, the embodiments of the present disclosure also provide a manufacturing method of an organic light-emitting display substrate comprising a display area and a non-display area surrounding the display area. The display area comprises at least one opening <NUM> penetrating through the organic light-emitting display substrate. The manufacturing method of the organic light-emitting display substrate comprises the following steps S1 to S5.

At step S1, an organic layer <NUM> is formed on one side of the substrate <NUM>.

In some embodiments, the organic layer <NUM> comprises a first organic layer <NUM> and a second organic layer <NUM> sequentially arranged along a direction away from the substrate <NUM>.

In an embodiment of the present disclosure, the substrate <NUM> is a flexible substrate and pre-formed on a glass substrate <NUM>. The glass substrate <NUM> plays a supporting role during the manufacturing process of the organic light-emitting display substrate. After the manufacture of the structure of the organic light-emitting display substrate is completed, the glass substrate <NUM> is peeled off the substrate <NUM> to support the flexible property of the organic light-emitting display substrate.

At step S2, a first inorganic layer <NUM> is formed on one side of the organic layer <NUM> away from the substrate <NUM>.

At step S3, an overall structure of the first inorganic layer <NUM> and the organic layer <NUM> is etched to form at least one annular partition groove <NUM> corresponding to each opening <NUM>. The annular partition groove <NUM> surrounds a periphery of the opening <NUM> and extends into the organic layer <NUM> along a direction close to the substrate <NUM>. The width of the orthographic projection the notch of the annular partition groove <NUM> on the substrate <NUM> is smaller than the width of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>.

Since the materials of the first inorganic layer <NUM> and the organic layer <NUM> are quite different, an appropriate selection ratio may be selected to dry etch the first inorganic layer <NUM> and the organic layer <NUM> to form an undercut-like structure of the annular partition groove <NUM>. That is, the width of the orthographic projection the notch of the annular partition groove <NUM> on the substrate <NUM> is smaller than the width of the orthographic projection of the annular partition groove <NUM> on the substrate <NUM>.

At step S4, an anode layer <NUM> is formed on one side of the first inorganic layer <NUM> away from the substrate <NUM>. The anode layer <NUM> comprises a plurality of anodes <NUM> and an annular covering portion <NUM> corresponding to each annular partition groove <NUM>. The annular covering portion <NUM> at least covers a bottom wall and two side walls of a corresponding annular partition groove <NUM>.

At step S5, an organic functional layer <NUM> is formed on one side of the anode layer <NUM> away from the substrate <NUM>. As shown in <FIG>, the organic functional layer <NUM> comprises a first organic functional material portion <NUM> located outside the annular partition groove <NUM> and a second organic functional material portion <NUM> located inside the annular partition groove <NUM>. The first organic functional material portion <NUM> and the second organic functional material portion <NUM> are not connected to each other by being partitioned by the annular partition groove <NUM>.

In some embodiments of the present disclosure, at step S5, the outer edge of the orthographic projection of the formed annular covering portion <NUM> on the substrate <NUM> is located outside the outer edge of the orthographic projection of the notch of the annular partition groove <NUM> on the substrate <NUM>, and the inner edge of the orthographic projection of the formed annular covering portion <NUM> on the substrate <NUM> is located inside the inner edge of the orthographic projection of the notch of the annular partition groove <NUM> on the substrate <NUM>.

In some embodiments of the present disclosure, the organic layer <NUM> comprises a first organic layer <NUM> and a second organic layer <NUM> sequentially arranged along a direction away from the substrate <NUM>. The manufacturing method of the organic light-emitting display substrate further comprises following steps.

A semiconductor layer <NUM>, a first insulating layer <NUM>, a first gate metal layer <NUM>, a second insulating layer <NUM>, a second gate metal layer <NUM>, a third insulating layer <NUM>, a first data metal layer <NUM>, and a second inorganic layer <NUM> are sequentially formed on one side of the substrate <NUM>, before the first organic layer <NUM> is formed.

A second data metal layer <NUM> is formed on one side of the first organic layer <NUM> away from the substrate <NUM>, after the first organic layer <NUM> is formed and before the second organic layer <NUM> is formed.

A pixel defining layer <NUM> and a spacer layer <NUM> are sequentially formed on one side of the anode layer <NUM> away from the substrate <NUM>, after the anode layer <NUM> is formed and before the organic functional layer <NUM> is formed.

A cathode layer <NUM> and an encapsulation layer <NUM> are sequentially formed on one side of the organic functional layer <NUM> away from the substrate <NUM>, after the organic functional layer <NUM> is formed. The cathode layer <NUM> comprises a first cathode material portion <NUM> located outside the annular partition groove <NUM> and a second cathode material portion <NUM> located inside the annular partition groove <NUM>. The first cathode material portion <NUM> and the second cathode material portion <NUM> are not connected to each other by being partitioned by the annular partition groove <NUM>.

The first data metal layer <NUM> is connected to the semiconductor layer <NUM> through a plurality of first via holes 6b, and connected to the second data metal layer <NUM> through a plurality of second via holes 6c, and the second data metal layer <NUM> is connected to the anode layer <NUM> through a plurality of third via holes 6a. In an embodiment of the present disclosure, after the step S2, before the step S3 or during the step S3, the overall structure of the first inorganic layer <NUM> and the organic layer <NUM> is etched to form the plurality of third via holes 6a opening extending to the second data metal layer <NUM>.

In some embodiments of the present disclosure, the manufacturing method of the organic light-emitting display substrate further comprises the following step. The opening <NUM> is formed by dry etching after the first inorganic layer <NUM> is formed. This step may be performed after the step S3 and before the step S4, or performed after the manufacture of the cathode layer <NUM> or the encapsulation layer <NUM> is completed.

In the organic light-emitting display substrate manufactured by the above method of the present disclosure, when the first inorganic layer <NUM> fails to be encapsulated at an edge of the opening <NUM>, the entry path of water vapor will end at a contact surface of the two inorganic materials of the annular covering portion <NUM> and the first inorganic layer <NUM>. Therefore, the organic light-emitting display substrate has a favorable encapsulation property.

As shown in <FIG>, the embodiments of the present disclosure also provide an organic light-emitting display device <NUM> comprising the organic light-emitting display substrate <NUM> of any one of the above embodiments. In the embodiments of the present disclosure, the organic light-emitting display device may be a curved display device, a flexible display device, or a tensile display device. The organic light-emitting display device is not limited to a specific product type, for example, may be a mobile phone, a tablet computer, a display, a television, a painting screen, an advertising screen, an electronic paper, a smart wearable, an in-vehicle navigation, or the like.

Since the organic light-emitting display substrate has a favorable encapsulation property and a longer service life, the organic light-emitting display device also has a favorable product quality.

Hereto, various embodiments of the present disclosure have been described in detail. Some details well known in the art are not described to avoid obscuring the concept of the present disclosure. According to the above description, those skilled in the art would fully know how to implement the technical solutions disclosed herein.

Claim 1:
An organic light-emitting display substrate (<NUM>), comprising a display area (<NUM>) and a non-display area (<NUM>) surrounding the display area (<NUM>), the display area (<NUM>) comprising at least one opening (<NUM>) penetrating through the organic light-emitting display substrate (<NUM>), the organic light-emitting display substrate (<NUM>) comprising:
a substrate (<NUM>);
an organic layer (<NUM>) located on one side of the substrate (<NUM>);
a first inorganic layer (<NUM>) located on one side of the organic layer (<NUM>) away from the substrate (<NUM>), wherein an overall structure of the first inorganic layer (<NUM>) and the organic layer (<NUM>) has at least one annular partition groove (<NUM>) corresponding to each of the at least one opening (<NUM>), the at least one annular partition groove (<NUM>) surrounds a periphery of the each of the at least one opening (<NUM>) and extends into the organic layer (<NUM>) towards the substrate (<NUM>), and a width of an orthographic projection of a notch (60c) of each of the at least one annular partition groove (<NUM>) on the substrate (<NUM>) is smaller than a width of an orthographic projection of the each of the at least one annular partition groove (<NUM>) on the substrate (<NUM>);
an anode layer (<NUM>) located on one side of the first inorganic layer (<NUM>) away from the substrate (<NUM>), and comprising a plurality of anodes (<NUM>) and an annular covering portion (<NUM>) corresponding to each of the at least one annular partition groove (<NUM>), wherein the annular covering portion (<NUM>) at least covers a bottom wall (60a) and two side walls (60b) of an annular partition groove (<NUM>) of the at least one annular partition groove (<NUM>) corresponding to the annular covering portion (<NUM>), and
an organic functional layer (<NUM>) located on one side of the anode layer (<NUM>) away from the substrate (<NUM>), and comprising a first organic functional material portion (<NUM>) located outside the at least one annular partition groove (<NUM>), and a second organic functional material portion (<NUM>) located inside the at least one annular partition groove (<NUM>) and not connected to the first organic functional material portion (<NUM>) and
characterized in that a material of the annular covering portion (<NUM>) is the same as a material of the plurality of anodes (<NUM>.)