CN115411213A - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device, which relate to the technical field of display and comprise: a substrate base plate; an array layer on the substrate base plate, the array layer comprising a plurality of transistors; the light-emitting layer is positioned on one side of the array layer, which is far away from the substrate base plate, and comprises an anode, a pixel defining layer, a light-emitting material layer and a cathode; the pixel defining layer comprises a plurality of pixel openings, and the light-emitting material layer is positioned in the pixel openings; the packaging layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate, and comprises a first inorganic layer; the pixel defining layer includes a plurality of first openings extending in a direction perpendicular to the substrate base, and the first inorganic layer includes a portion filled in the first openings. Therefore, the impact resistance of the display panel and the display device is improved.

Description

Display panel and display device

This application is a divisional application with application number 202011169956.6, application date October 28, 2020, and invention title "display panel and display device".

technical field

The present invention relates to the field of display technology, and more specifically, to a display panel and a display device.

Background technique

From the era of CRT (Cathode Ray Tube, cathode ray tube) to the era of liquid crystal, and now to the era of OLED (Organic Light-Emitting Diode, organic light-emitting diode), the display industry has experienced decades of development and has become ever-changing. The display industry is already closely related to our lives. From traditional mobile phones, tablets, TVs and PCs to current electronic devices such as smart wearable devices and VR, display technology is inseparable.

With the development of display technology, foldable display devices are also favored by users due to their foldable performance. In a foldable display device, the usual film layer structure of the display panel includes an inorganic layer with high hardness and an organic layer with low hardness. For example, the packaging layer of the display panel may be provided with an inorganic layer and an organic layer structure. During the folding process, the impact force on the hard inorganic layer will be conducted downward, which may cause damage to the transistor structure in the display panel. Therefore, how to improve the impact resistance of the display panel has become one of the technical problems to be solved urgently at this stage.

Contents of the invention

In view of this, the present invention provides a display panel and a display device, which are beneficial to improving impact resistance and reducing the risk of transistor failure.

In a first aspect, the present application provides a display panel, including:

Substrate substrate;

An array layer located on the base substrate, the array layer includes a plurality of transistors;

The luminescent layer located on the side of the array layer away from the base substrate, the luminescent layer includes an anode, a pixel definition layer, a luminescent material layer and a cathode; the pixel definition layer defines a plurality of pixel openings, and the luminescent material layer is located in the pixel In the opening, along a direction perpendicular to the base substrate, the anode is located on a side of the luminescent material layer close to the array layer, and the cathode is located on a side of the luminescent material layer away from the array layer;

An encapsulation layer, located on the side of the cathode away from the base substrate, the encapsulation layer comprising a first inorganic layer;

The pixel definition layer includes a plurality of first openings extending along a direction perpendicular to the base substrate, and the first inorganic layer includes a portion filled in the first openings.

In a second aspect, the present application provides a display device, including the display panel provided in the present application.

Compared with the prior art, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

In the display panel and display device provided by the present invention, a light-emitting layer is provided on the side of the array layer far away from the base substrate. Usually, the array layer is used to drive the light-emitting material layer in the light-emitting layer to emit light; the light-emitting layer includes a pixel definition layer, and the pixel The definition layer defines a plurality of pixel openings, and the layer of emissive material is located in the pixel openings. An encapsulation layer is provided on the side of the light-emitting layer far away from the base substrate, and the encapsulation layer includes a first inorganic layer. Considering that the inorganic layer has a better function of blocking water and oxygen, the encapsulation layer is used to encapsulate the light-emitting layer, which can effectively block External moisture and oxygen affect the light-emitting layer. When the first inorganic layer is used to encapsulate the luminescent material layer, the first inorganic layer will cover each pixel opening, so as to realize reliable encapsulation of the luminescent material layer. In particular, in addition to the pixel openings, the present invention introduces a plurality of first openings on the pixel definition layer, the first openings extend along the direction perpendicular to the base substrate, and the first inorganic layer includes part. When impacted by an external force, the first inorganic layer will not only form a plurality of stress points in the pixel openings, but also form a plurality of stress points in the plurality of first openings, thereby increasing the resistance of the display panel to external forces. When impacted, the inorganic layer forms multiple points of force, avoiding the impact force from converging at a certain position, so that the impact force is released from multiple places, thus effectively improving the impact resistance of the display panel.

Of course, any product implementing the present invention does not necessarily need to achieve all the above-mentioned technical effects at the same time.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a cross-sectional structure diagram of a display panel in the related art;

FIG. 2 is a schematic structural view of a display panel provided by the present invention;

FIG. 3 is an AA cross-sectional view of the display panel in FIG. 2;

FIG. 4 is a schematic diagram showing the force of the display panel in FIG. 3;

FIG. 5 is a diagram showing a relative positional relationship between the first opening and the channel region of the transistor provided by the present invention;

FIG. 6 is another AA sectional view of the display panel in FIG. 2;

FIG. 7 is another AA sectional view of the display panel in FIG. 2;

FIG. 8 is another AA sectional view of the display panel in FIG. 2;

FIG. 9 is another AA sectional view of the display panel in FIG. 2;

FIG. 10 is a schematic plan view of a display device provided by an embodiment of the present invention.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the description.

In all examples shown and discussed herein, any specific values should be construed as exemplary only, and not as limitations. Therefore, other instances of the exemplary embodiment may have different values.

It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.

Fig. 1 is a cross-sectional structure diagram of a display panel in the related art, the display panel 100' includes a base substrate 10', an array layer 20', a light emitting layer 30' and an encapsulation layer 40', the light emitting layer 30' The pixel opening is filled with luminescent material, and the inorganic layer 41' in the encapsulation layer 40' covers the side of the luminescent layer 30' away from the substrate 10' and fills the pixel opening. When impacted by an external force, the inorganic layer A plurality of stress points S' are formed near the pixel openings and support pillars PS, so that the stress is concentrated at these stress points S' and transmitted downward, and is easily transmitted to the inorganic layer corresponding to the array layer 20', causing the array layer 20' The fracture of the inorganic layer in the array layer 20 ′ increases the risk of failure of the transistor due to the fracture of the inorganic layer in the array layer 20 ′. Therefore, there is an urgent need to improve the impact resistance of the display panel.

In view of this, the present invention provides a display panel and a display device, which are beneficial to improving impact resistance and reducing the risk of transistor failure.

The following will describe in detail with reference to the drawings and specific embodiments.

Fig. 2 is a schematic structural view of the display panel provided by the present invention, Fig. 3 is an AA sectional view of the display panel in Fig. 2, and Fig. 4 is a schematic diagram of the force of the display panel in Fig. 3 , please refer to FIG. 1 to FIG. 4, a display panel 100 provided by the present invention includes:

base substrate 10;

An array layer 20 located on the base substrate 10, the array layer 20 includes a plurality of transistors T;

The light-emitting layer 30 located on the side of the array layer 20 away from the base substrate 10, the light-emitting layer 30 includes an anode 31, a pixel definition layer 32, a light-emitting material layer 33 and a cathode 34; the pixel definition layer 32 defines a plurality of pixel openings K0, and the light-emitting material layer 33 is located in the pixel opening K0;

An encapsulation layer 40, located on the side of the cathode 34 away from the base substrate 10, the encapsulation layer 40 includes a first inorganic layer 41;

The pixel definition layer 32 includes a plurality of first openings K1 , and the first openings K1 extend along a direction F perpendicular to the base substrate 10 , and the first inorganic layer 41 includes portions filled in the first openings K1 .

It should be noted that FIG. 2 only shows the display panel 100 provided by the present invention by taking a rectangle as an example, and does not represent the actual shape of the display panel 100. In some other embodiments of the present invention, the display panel 100 can also embody It is a rounded rectangle, a circle or an irregular shape, which is not specifically limited in the present application. In addition, FIG. 3 only schematically illustrates the film layer structure on the display panel 100 , and does not represent the actual number and size of the film layers. Optionally, in order to improve the encapsulation reliability of the encapsulation layer 40, in the display panel 100 provided by the present invention, the encapsulation layer 40 may also include an organic layer and a second inorganic layer 42 in addition to the first inorganic layer 41, wherein the organic The layer 43 is disposed between the first inorganic layer 41 and the second inorganic layer 42 , and the first inorganic layer 41 is located on a side of the organic layer 43 close to the base substrate 10 .

Specifically, please continue to refer to FIG. 2 to FIG. 4. In the display panel 100 provided by the present invention, the display panel 100 includes a base substrate 10 and an array layer 20 arranged on the side of the base substrate 10, and the array layer 20 is far away from the One side of the base substrate 10 is provided with a light-emitting layer 30, usually the array layer 20 is used to drive the light-emitting material layer 33 in the light-emitting layer 30 to emit light; the light-emitting layer 30 includes a pixel definition layer 32, and the pixel definition layer 32 defines a plurality of pixel openings K0 , the luminescent material layer 33 is located in the pixel opening K0. The luminescent layer 30 includes an anode 31, a luminescent material layer 33 and a cathode 34, wherein the anode 31 is used to electrically connect with the transistor T in the driving layer. Optionally, the anode 31 is located on the side of the luminescent material layer 33 close to the substrate 10, The cathode 34 is located on a side of the luminescent material layer 33 away from the base substrate 10 . An encapsulation layer 40 is provided on the side of the luminescent layer 30 away from the base substrate 10, specifically, an encapsulation layer 40 is provided on the side of the cathode 34 in the luminescent layer 30 away from the base substrate 10, and the encapsulation layer 40 includes a first inorganic Layer 41 , considering that the inorganic layer has a better function of blocking water and oxygen, the encapsulation layer 40 is used to encapsulate the light-emitting layer 30 , which can effectively block the influence of external moisture and oxygen on the light-emitting layer 30 .

When the first inorganic layer 41 is used to encapsulate the luminescent material layer 33, the first inorganic layer 41 will cover each pixel opening K0. Optionally, the first inorganic layer 41 will fill the pixel opening K0 to achieve Reliable encapsulation of layer 33. In particular, in addition to the pixel opening K0, the present invention introduces a plurality of first openings K1 on the pixel definition layer 32. The first openings K1 extend along a direction perpendicular to the base substrate 10. The first inorganic layer 41 also includes The portion filled in the first opening K1. When impacted by an external force, the first inorganic layer 41 will form a plurality of stress points S in the first openings K1 in addition to forming a plurality of stress points S in the pixel opening K0, thereby increasing the When the display panel 100 is impacted by an external force, the inorganic layer forms a multi-point force. For example, please refer to FIG. The phenomenon that the inorganic layer in the array layer 20 is broken due to the impact force of the array layer 20 is beneficial to avoid the failure of the transistor T caused by the inorganic layer in the array layer 20 being broken, thus effectively improving the impact resistance of the display panel 100 .

Optionally, the orthographic projection of the first opening K1 on the plane of the base substrate 10 does not overlap at least the orthographic projection of the pixel opening K0 and the channel region G of the transistor T on the plane of the base substrate 10, thereby effectively reducing the When the inorganic layer forms the stress point S in the first opening K1, the impact force may be transmitted downward to the transistor T and the inorganic layer at the corresponding position of the transistor T. On the one hand, it is beneficial to reduce the impact force on the transistor T. Damage or even The possibility of failure, on the other hand, is also beneficial to reduce the possibility of fracture of the inorganic layer in the array layer 20 when it is subjected to the impact force conducted by the first inorganic layer 41, so as to avoid the damage or failure of the transistor T caused by the fracture of the inorganic layer. Therefore, it is beneficial to improve the display reliability of the display panel 100 when the display panel 100 is subjected to impact force, and thus further helps to improve the impact resistance performance of the display panel 100 . It should be noted that, in the present invention, the pixel opening K0 and the first opening K1 on the pixel definition layer 32 can be manufactured in the same process, so as to simplify the manufacturing process of the display panel 100 .

Furthermore, in the present invention, the orthographic projection of the first opening K1 on the plane of the base substrate 10 does not overlap with the orthographic projection of the gate of the transistor T on the plane of the base substrate 10, so that the display panel 100 can effectively reduce the When impacted by an external force, the possibility of the impact force being transmitted downward to the gate of the transistor T when the force point S is formed in the first opening K1 is beneficial to reduce the possibility of damage to the gate of the transistor T by the impact force, and further The possibility of damage or even failure caused by the impact force to the transistor T is reduced, which is beneficial to improving the impact resistance performance of the display panel 100 .

Optionally, the orthographic projection of the anode 31 on the plane of the base substrate 10 does not overlap with the orthographic projection of the first opening K1 on the plane of the base substrate 10 . It can be understood that the anode 31 is used to electrically connect with the transistor T in the driving layer. If the first opening K1 overlaps the anode 31 along the direction perpendicular to the plane of the base substrate 10, when the display panel 100 is subjected to When an external force impacts, when the force point S is formed in the first opening K1 , the impact force is transmitted downward to the anode 31 , causing damage to the anode 31 , thereby affecting the display of the display panel 100 . In the present invention, by setting the direction perpendicular to the plane where the base substrate 10 is located, the first opening K1 and the anode 31 do not overlap, which can reduce the possibility of damage to the anode 31 by the impact force, thereby improving the resistance of the display panel 100. impact performance.

FIG. 5 is a diagram showing a relative positional relationship between the first opening K1 and the channel region G of the transistor provided by the present invention. Please refer to FIG. 3 . When multiple first openings K1 are formed on the pixel definition layer 32 , the location of the first opening K1 avoids the pixel opening K0, that is, the orthographic projection of the first opening K1 on the base substrate 10 does not overlap with the orthographic projection of the pixel opening K0 on the base substrate 10, The number and size of the first openings K1 can be flexibly set according to the size of the non-opening area in the display panel 100 . Optionally, a plurality of first openings K1 are arranged around the channel region G of the transistor T. Since the channel region G of the transistor T is a core component of the transistor T, it is a region where the gate of the transistor overlaps with the active layer. Optionally, in the present invention, the setting of the first opening K1 avoids the channel region G of the transistor T at the same time. The track regions G do not overlap, so as to avoid the influence of the impact force on the transistor T. When the first opening K1 is arranged to avoid the pixel opening K0 and the channel region G of the transistor T, the first opening K1 can be arranged as uniformly as possible in the display panel 100, or the setting of the first opening K1 makes the second The sharp structures formed by an inorganic layer 41 in the first opening K1, the pixel opening K0 and other positions are evenly distributed on the display panel 100 as much as possible, so that when the display panel 100 is impacted by an external force, the sharp structures formed by the first inorganic layer 41 The formed sharp structure can evenly release the impact force, which is more conducive to avoiding the problem of excessive force on a single point in the display panel 100 .

In an optional embodiment of the present invention, please continue to refer to FIG. 3 , along the direction F perpendicular to the base substrate 10 , the height h1 of each first opening K1 is the same.

It can be understood that, when the first opening K1 is formed on the pixel definition layer 32, along the direction F perpendicular to the base substrate 10, the first opening K1 includes opposite first end faces K11 and second end faces K12. The height h1 of the first opening K1 mentioned in the invention refers to the distance between the first end surface K11 and the second end surface K12 of the first opening K1 along the direction perpendicular to the base substrate 10, that is, the first The groove depth of a hole K1.

In the present invention, when forming a plurality of first openings K1 on the pixel definition layer 32, the heights of the first openings K1 along the direction perpendicular to the base substrate 10 are set to be the same. In this way, when making the first openings K1, The first opening K1 can be formed by using the same process size, so the arrangement of the first opening K1 with the same height is beneficial to simplify the manufacturing process of forming the first opening K1 on the pixel definition layer 32, and is beneficial to improve the display. The production efficiency of the panel 100.

In an optional embodiment of the present invention, please continue to refer to FIG. 3 , along a direction perpendicular to the base substrate 10 , the height h1 of the first opening K1 is smaller than the height h2 of the pixel definition layer 32 .

Specifically, since the first opening K1 is formed by making a groove on the pixel definition layer 32, when along the direction perpendicular to the base substrate 10, the height h1 of the first opening K1 is smaller than the height h2 of the pixel definition layer 32 , it means that along the direction perpendicular to the base substrate 10 , the first opening K1 does not penetrate the pixel definition layer 32 . When the first inorganic layer 41 in the encapsulation layer 40 is filled in the first openings K1, multiple sharp structures can also be formed in the first openings K1. When the display panel 100 is subjected to an external impact force, The sharp structure in the first inorganic layer 41 can form multiple stress points S, which is equivalent to increasing the number of stress points S on the first inorganic layer 41 in the display panel 100, so that the impact force can be released from multiple places, so It is also beneficial to improve the impact resistance of the display panel 100 .

In an optional embodiment of the present invention, FIG. 6 shows another AA cross-sectional view of the display panel 100 in FIG. The height h1 of K1 is equal to the height h2 of the pixel definition layer 32 .

Specifically, FIG. 6 shows another form of the first opening K1 in the present invention. The structure of the display panel 100 in FIG. 6 is the same as that in FIG. 3 , except that the height of the first opening K1 is different. In the embodiment shown in FIG. 6 , along the direction perpendicular to the base substrate 10, the height h1 of the first opening K1 is equal to the height h2 of the pixel definition layer 32, that is, the first opening K1 in this embodiment is along the The direction perpendicular to the base substrate 10 is arranged through the pixel definition layer 32 . When the height of the first opening K1 becomes larger, the first inorganic layer 41 filled in the first opening K1 will more easily form a sharp structure. The first inorganic layer 41 of K1 is easier to form multiple stress points S, which is more conducive to realizing the multi-point release of impact force, which is more conducive to improving the impact resistance of the display panel 100 and avoiding excessive single-point impact force The phenomenon that the inorganic layer in the array layer 20 breaks and the transistor T fails.

In an optional embodiment of the present invention, FIG. 7 is another AA cross-sectional view of the display panel 100 in FIG. On one side of the base substrate 10 , the first opening K1 exposes the auxiliary layer 50 ; in the first opening K1 , the cathode 34 is in direct contact with the auxiliary layer 50 .

Specifically, FIG. 7 shows another form of the first opening K1 in the present invention. The structure of the display panel 100 in FIG. 7 is the same as that in FIG. The auxiliary layer 50 is introduced, and the auxiliary layer 50 is located on the side of the pixel definition that was close to the base substrate 10. When the first opening K1 is formed on the pixel definition layer 32, the height h1 of the first opening K1 is the same as that of the pixel definition layer 32. The height h2 is the same, that is, the first opening K1 penetrates the pixel definition layer 32 along the direction perpendicular to the base substrate 10 , exposing the auxiliary layer 50 . Since the cathode 34 in the luminescent layer 30 covers the entire surface of the luminescent material layer 33 away from the base substrate 10, when the first opening K1 is formed on the pixel definition layer 32, the cathode 34 will be formed on the first opening K1 together. In the opening K1 , since the first opening K1 exposes the auxiliary layer 50 , the cathode 34 in the first opening K1 will directly contact with the auxiliary layer 50 to form an electrical connection. Optionally, the auxiliary layer 50 in the present invention is a conductive material, and the auxiliary layer 50 corresponds to the first openings K1 one by one. In the first opening K1 , when the cathode 34 is electrically connected to the auxiliary layer 50 , it is equivalent to connecting a resistor structure in parallel to the cathode 34 , thereby reducing the overall resistance of the cathode 34 . Since the cathode 34 covers the side of the luminescent material 33 away from the substrate 10, when the resistance of the cathode 34 is large, a large impedance will be formed during the signal transmission process of the cathode 34, resulting in a large voltage drop at different positions, so that The phenomenon that the electrical signals transmitted by the cathode 34 are quite different, the present application effectively reduces the resistance of the cathode 34 by connecting the auxiliary layer 50 to the cathode 34, thereby helping to reduce the voltage drop of the cathode 34 during the signal transmission process, Therefore, it is beneficial to improve the uniformity of the signal transmitted by the cathode 34 , thus it is beneficial to improve the display uniformity of the display panel 100 , and further to improve the display effect of the display panel 100 .

In an optional embodiment of the present invention, please continue to refer to FIG. 7 , along the direction F perpendicular to the base substrate 10, the anode 31 is located on the side of the luminescent material layer 33 close to the array layer 20, and the cathode 34 is located on the luminescent material layer. 33 away from the side of the array layer 20; the auxiliary layer 50 is set on the same layer as the anode 31. When the auxiliary layer 50 and the anode 31 are arranged on the same layer, the auxiliary layer 50 and the anode 31 can be produced in the same process, and the auxiliary layer 50 can be formed together when the anode 31 is formed, so that there is no need to introduce a separate The production process is thus beneficial to simplify the production process of the display panel 100 after introducing the thickness of the auxiliary layer 50 and improve the production efficiency of the display panel 100 . It can be understood that since the anode 31 and the cathode 34 in the luminescent layer 30 transmit different electrical signals, when the auxiliary layer 50 and the anode 31 are arranged on the same layer, the auxiliary layer 50 and the anode 31 are insulated, which is conducive to the occurrence of signal disturbance. The phenomenon is beneficial to improve the display reliability of the display panel 100 .

In an optional embodiment of the present invention, FIG. 8 shows another AA cross-sectional view of the display panel 100 in FIG. The direction of the base substrate 10, the first organic layer 60 is located between the array layer 20 and the light emitting layer 30; the display panel 100 also includes a plurality of second openings K2, along the direction perpendicular to the base substrate 10, the second openings K2 penetrates at least part of the first organic layer 60 ; the second opening K2 is provided in one-to-one correspondence with the first opening K1 , and the first opening K1 communicates with the second opening K2 .

Understandably, the first organic layer 60 disposed between the array layer 20 and the light emitting layer 30 in the present invention may be, for example, a planarization layer. In the embodiment shown in FIG. 8 , in addition to the first opening K1 on the pixel definition layer 32 , a second opening K2 is also provided on the first organic layer 60 . It should be noted that the pixel definition layer 32 and the first organic layer 60 have two kinds of film structure, and the anode 31 is arranged between them, so the process of forming the via hole on the pixel definition layer 32 and the first organic layer 60 Usually separate, for example, first form the second opening K2 on the first organic layer 60, then form the anode 31 on the first side of the first organic layer 60 away from the base substrate 10, and then form the anode 31 away from the base substrate A pixel definition layer 32 is formed on one side of the pixel 10 , and finally a first opening K1 is formed on the pixel definition layer 32 .

Specifically, please refer to FIG. 8 , the present invention forms a plurality of second openings K2 on the first organic layer 60, and the second openings K2 are set in one-to-one correspondence with the first openings K1. Here, the one-to-one correspondence setting It means that in a direction perpendicular to the base substrate 10 , a first opening K1 corresponds to a second opening K2 , and a first opening K1 communicates with a second opening K2 . When the second opening K2 corresponding to the first opening K1 is provided on the first organic layer 60, the first inorganic layer 41 will be able to extend downward from the first opening K1, so that the first inorganic layer 41 forms a sharp structure, and the height of the sharp structure along the direction perpendicular to the base substrate 10 is larger, when the height of the sharp structure becomes larger, it is more conducive to the formation of the force point S, that is, when the display panel 100 is subjected to external forces When the impact force acts, the sharp structure formed by the first inorganic layer 41 will form multiple stress points S in the display panel 100, so that the impact force of the display panel 100 after being impacted is released from multiple places, effectively preventing single point Excessive impact force will cause the inorganic layer in the array layer 20 to break and cause damage to the transistor T. Therefore, it is more beneficial to improve the impact resistance of the display panel 100 .

In an optional embodiment of the present invention, please continue to refer to FIG. 8 , along a direction perpendicular to the base substrate 10 , the height of the second opening K2 is smaller than the height of the first organic layer 60 .

Specifically, in the display panel 100 provided by the present invention, when the second opening K2 is formed on the first organic layer 60, the height h3 of the second opening K2 along the direction perpendicular to the base substrate 10 When it is less than the height h4 of the first organic layer 60, that is to say, the second opening K2 will not penetrate the first organic layer 60, so that the sharp structure formed by the first inorganic layer 41 will not be in contact with the first organic layer 60. The other inorganic layers on the side close to the base substrate 10 are in contact. In the present invention, when using the first inorganic layer 41 to form a sharp structure in the first opening K1, when the side of the sharp structure facing the base substrate 10 is an organic layer structure, since the hardness of the organic layer is smaller than that of the inorganic layer, When the display panel 100 is subjected to an external impact force to form multiple stress points S in the first inorganic layer 41 with high hardness, the impact force is transmitted to the first organic layer with low hardness on the side facing the base substrate 10 60, the first organic layer 60 can buffer and release the impact force to a certain extent, thereby avoiding the impact force on the sharp structure formed by the first inorganic layer 41 from directly acting on the inorganic layer in the array layer 20, thus the second The height of the two openings K2 along the direction perpendicular to the base substrate 10 is smaller than that of the first organic layer 60, and the first organic layer 60 can be used to buffer the impact force, reducing the impact on the inorganic layers in the array layer 20. Impact force, thereby avoiding the phenomenon that the inorganic layer in the array layer 20 is broken due to a large impact force, thereby avoiding the phenomenon that the transistor T is damaged due to the fracture of the inorganic layer, and greatly improving the impact resistance of the display panel 100 performance.

Optionally, the first organic layer 60 includes a first via hole through which the anode 31 is electrically connected to the transistor T, wherein the orthographic area of the first opening K1 on the plane where the base substrate 10 is located is larger than that of the first via hole K1. The area of the orthographic projection of the hole on the plane where the base substrate 10 is located. It can be understood that setting the first opening K1 larger than the first via hole is beneficial to avoid stress accumulation at the first via hole, thereby ensuring the connection between the anode 31 and the transistor T, thereby ensuring normal display of the display panel 100 .

Optionally, please continue to refer to FIG. 6 and FIG. 8 , the first inorganic layer 41 includes a first part and a second part, and along a direction perpendicular to the plane where the base substrate 10 is located, the first part overlaps the first opening K1 , the second part overlaps with the pixel opening K0; along the direction perpendicular to the plane where the base substrate 10 is located, the surface of the first part on the side close to the base substrate 10 and the surface of the first organic layer 60 on the side away from the base substrate 10 The distance therebetween is smaller than the distance between the surface of the second portion near the base substrate 10 and the surface of the first organic layer 60 away from the base substrate 10 . It can be understood that the luminescent material layer 33 is located in the pixel opening K0, and at least part of the anode 31 is located in the pixel opening K0, so the surface of the second part close to the base substrate 10 and the first organic layer 60 are away from the base substrate 10 The distance between the surfaces on one side is greater.

Optionally, along a direction perpendicular to the plane where the base substrate 10 is located, the minimum distance between the surface of the first portion on the side away from the base substrate 10 and the surface of the first organic layer 60 on the side away from the base substrate 10 and the The minimum distance between the surface of the two parts on the side away from the base substrate 10 and the surface of the first organic layer 60 on the side away from the base substrate 10 is not equal.

Optionally, along a direction perpendicular to the plane where the base substrate 10 is located, the minimum distance between the surface of the first part on the side away from the base substrate 10 and the surface of the first organic layer 60 on the side away from the base substrate 10 is greater than The minimum distance between the surface of the second portion on the side away from the base substrate 10 and the surface of the first organic layer 60 on the side away from the base substrate 10 .

In an optional embodiment of the present invention, please continue to refer to FIG. 3 , the first opening K1 includes a first end surface K11 and a second end surface K12 oppositely disposed, and the first end surface K11 is located at the second end surface K12 close to the substrate 10 ; the area of the orthographic projection of the first end face K11 on the base substrate 10 is smaller than the area of the orthographic projection of the pixel opening K0 on the base substrate 10 .

It can be understood that when the first opening K1 is formed on the pixel electrode layer, due to the limitation of the production process, from the side away from the base substrate 10 to the side close to the base substrate 10, the aperture diameter of the first opening K1 It shows a decreasing trend, that is, the area of the first end surface K11 disposed close to the base substrate 10 in the first opening K1 will be smaller than the area of the second end surface K12 disposed away from the base substrate 10 . The top view of the first opening K1 and the pixel opening K0 in the embodiment shown in FIG. 5 shows the positional relationship between the second end face K12 of the first opening K1 and the pixel opening K0. The area of the second end surface K12 is smaller than the area of the orthographic projection of the pixel opening K0 on the base substrate 10 for example. At this time, the area of the first end surface K11 of the first opening K1 must also be smaller than the area of the pixel opening K0 on the base substrate. The area of the orthographic projection of 10. In the present invention, when the area of the first end surface K11 with a smaller area of the first opening K1 is set smaller than the area of the orthographic projection of the pixel opening K0 on the base substrate 10, the display can be The non-opening area of the panel 100 forms more first openings K1. When the area of the first openings K1 is small, it is more conducive to the formation of a sharp structure by the first inorganic layer 41 in the first openings K1. On the one hand, it is beneficial Improving the sharpness of the sharp structure to form a better stress point S, on the other hand, is also conducive to increasing the number of sharp structures. When the number of sharp structures formed by the first inorganic layer 41 on the display panel 100 is large, the display When the panel 100 is subjected to an external impact force, there will be more stress points S to release the impact force, which is more conducive to improving the impact resistance of the display panel 100 .

Further referring to FIG. 3 and FIG. 8 , optionally, the area of the orthographic projection of the first end surface K11 on the plane of the base substrate 10 is larger than the orthographic projection of the first via hole on the plane of the base substrate 10 . It can be understood that setting the area of the first end surface K11 to be larger than the area of the orthographic projection of the first via hole on the plane where the base substrate 10 is located is beneficial to avoid stress accumulation at the first via hole, thereby ensuring that the anode 31 and the transistor T connection, so as to ensure the normal display of the display panel 100.

In an optional embodiment of the present invention, please continue to refer to FIG. 3 , in each of the first openings K1 , the areas of the orthographic projections of the first end surfaces K11 on the base substrate 10 are equal.

Specifically, in the present invention, when the areas of the first end surfaces K11 of the first openings K1 on the orthographic projections of the base substrate 10 are set to be equal, it is beneficial to ensure that the first inorganic layer 41 forms a sharp edge in the first openings K1. The sharpness of each sharp structure is the same during the structure, so that the impact force received by each sharp structure formed by the first inorganic layer 41 in the first opening K1 is the same or similar in magnitude when subjected to an impact force, which is beneficial Improve the force uniformity of the sharp structure formed by each first inorganic layer 41 when it is subjected to impact force, so that the overall force of the display panel 100 is more uniform, and avoid excessive force at a single point in the display panel 100 phenomenon, so it is also beneficial to improve the impact resistance of the display panel 100 .

In an optional embodiment of the present invention, in the first section of the same first opening K1 , the sidewall of the first opening K1 is in a straight line or arc structure, and the first section is perpendicular to the substrate 10 .

Specifically, the embodiment shown in Fig. 3 and Fig. 6 shows that in the first section of the first opening K1, the sidewall of the first opening K1 is a straight line. Considering the different manufacturing processes, the first opening K1 The side wall can also be embodied as an arc structure. When the sidewall of the first opening K1 is a straight line or an arc structure, the first opening K1 can be manufactured by one process, for example, the first opening can be formed on the pixel definition layer 32 by one mask process. Hole K1 structure, this kind of manufacturing method is conducive to simplifying the production process of the first opening K1, so while improving the impact resistance of the display panel 100, it is also conducive to simplifying the manufacturing process of the display panel 100 and improving the manufacturing efficiency of the display panel 100 .

In an optional embodiment of the present invention, FIG. 9 shows another AA cross-sectional view of the display panel 100 in FIG. The wall is a stepped structure; along the direction that the encapsulation layer 40 points to the base substrate 10, the cross-sectional area of the first opening K1 along the second cross-section tends to decrease; wherein, the first cross-section is perpendicular to the base substrate 10, and the second cross-section parallel to the base substrate 10 .

Specifically, please continue to refer to FIG. 9 , the structure of the display panel 100 shown in FIG. 9 is the same as that of FIG. 6 , the only difference lies in the structure of the first opening K1 . In the embodiment shown in FIG. 9 , the sidewall of the first opening K1 has a stepped structure, and the cross-sectional area of the first opening K1 along the second section decreases along the direction that the packaging layer 40 points to the base substrate 10 trend. When the first inorganic layer 41 is filled in the first opening K1, the first inorganic layer 41 will not only form the stress point S at the bottom of the first opening K1, but also form the stress point S at the stepped corner. That is to say, when the present invention sets the side wall of the first opening K1 into a stepped structure, the first non-base layer will be able to form multiple stress points S in the same first opening K1, which is equivalent to increasing the When the display panel 100 is impacted by an external force, the number of force points S enables the impact force to be released through multiple force points S, effectively preventing the phenomenon that a single point of impact force is too large in the display panel 100, so it is more beneficial The impact resistance of the display panel 100 is improved. It should be noted that when the sidewall of the first opening K1 is formed into a stepped structure, it can be fabricated by using a 2-mask or multi-mask process, which is not specifically limited in the present application.

Based on the same inventive concept, the present invention also provides a display device, including any one of the display panels in the above embodiments. FIG. 10 is a schematic plan view of a display device 200 provided by an embodiment of the present invention. The display device 200 provided by this embodiment includes the display panel 100 provided by the above-mentioned embodiments of the present invention.

The embodiment shown in FIG. 10 only uses a mobile phone as an example to illustrate the display device 200. It can be understood that the display device provided by the embodiment of the present invention may be a computer, a television, a vehicle display device, and other display devices with display functions. The present invention is not specifically limited thereto. The display device provided by the embodiment of the present invention has the beneficial effect of the display panel provided by the embodiment of the present invention. For details, reference may be made to the specific descriptions of the display panel in the above embodiments, and details will not be repeated here in this embodiment.

It should be noted that the display device provided by the present invention is especially suitable for a flexible display device or a foldable display device.

To sum up, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:

In the display panel and display device provided by the present invention, a light-emitting layer is provided on the side of the array layer far away from the base substrate. Usually, the array layer is used to drive the light-emitting material layer in the light-emitting layer to emit light; the light-emitting layer includes a pixel definition layer, and the pixel The definition layer defines a plurality of pixel openings, and the layer of emissive material is located in the pixel openings. An encapsulation layer is provided on the side of the cathode in the light-emitting layer away from the base substrate, and the encapsulation layer includes a first inorganic layer. Considering that the inorganic layer has a better function of blocking water and oxygen, the encapsulation layer is used to encapsulate the light-emitting layer. It can effectively block the external moisture and oxygen from affecting the light-emitting layer. When the first inorganic layer is used to encapsulate the luminescent material layer, the first inorganic layer will cover each pixel opening, and the first inorganic layer will fill the pixel opening, so as to achieve reliable encapsulation of the luminescent material layer. In particular, in addition to the pixel openings, the present invention introduces a plurality of first openings on the pixel definition layer, the first openings extend along a direction perpendicular to the base substrate, and the first inorganic layer is also filled in the first openings . When impacted by an external force, the first inorganic layer will not only form a plurality of stress points in the pixel openings, but also form a plurality of stress points in the plurality of first openings, thereby increasing the resistance of the display panel to external forces. When impacted, the inorganic layer forms multiple points of force, avoiding the impact force from converging at a certain position, so that the impact force is released from multiple places, thus effectively improving the impact resistance of the display panel.

In addition, since the orthographic projection of the first opening on the plane of the base substrate in the present invention does not overlap at least the orthographic projection of the pixel opening and the channel region of the transistor on the plane of the substrate, thereby effectively reducing the When the stress point is formed in the first opening, the possibility of the impact force being transmitted downward to the transistor is also beneficial to reduce the possibility of damage or even failure of the transistor caused by the impact force, so it is beneficial to improve the display of the display panel when it is subjected to the impact force reliability, which is further beneficial to improving the impact resistance of the display panel.

Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims (20)

1. A display panel, comprising:

a substrate base plate;

an array layer on the substrate base plate, the array layer including a plurality of transistors;

the light-emitting layer is positioned on one side of the array layer, which is far away from the substrate base plate, and comprises an anode, a pixel defining layer, a light-emitting material layer and a cathode; the pixel defining layer comprises a plurality of pixel openings, and the light-emitting material layer is positioned in the pixel openings;

the packaging layer is positioned on one side of the light-emitting layer, which is far away from the substrate base plate, and comprises a first inorganic layer;

the pixel defining layer includes a plurality of first openings extending in a direction perpendicular to the substrate base, and the first inorganic layer includes a portion filled in the first openings.

2. The display panel according to claim 1, wherein the first openings have the same height in a direction perpendicular to the substrate base plate.

3. The display panel according to claim 1, wherein a height of the first opening is smaller than a height of the pixel defining layer in a direction perpendicular to the substrate base plate.

4. The display panel according to claim 3, wherein the first inorganic layer includes a first portion overlapping the first opening and a second portion overlapping the pixel opening in a direction perpendicular to a plane of the substrate base plate;

the display panel further comprises a first organic layer, wherein the first organic layer is positioned between the array layer and the light-emitting layer along a direction vertical to the substrate base plate;

in a direction perpendicular to the plane of the base substrate, the distance between the surface of the first portion close to the base substrate and the surface of the first organic layer far away from the base substrate is smaller than the distance between the surface of the second portion close to the base substrate and the surface of the first organic layer far away from the base substrate.

5. The display panel according to claim 1, wherein a height of the first opening is equal to the pixel definition layer height in a direction perpendicular to the substrate base plate.

6. The display panel according to claim 5, further comprising an auxiliary layer on a side of the pixel defining layer adjacent to the substrate base, wherein the first opening exposes the auxiliary layer; in the first opening, the cathode is in direct contact with the auxiliary layer.

7. The display panel according to claim 6, wherein the anode is located on a side of the light emitting material layer close to the array layer and the cathode is located on a side of the light emitting material layer away from the array layer in a direction perpendicular to the substrate base plate;

the auxiliary layer and the anode are arranged on the same layer.

8. The display panel according to claim 5, further comprising a first organic layer between the array layer and the light emitting layer in a direction perpendicular to the substrate base plate;

the display panel further comprises a plurality of second openings, and the second openings penetrate through at least part of the first organic layer along the direction perpendicular to the substrate base plate; the second opening is in one-to-one correspondence with the first opening, and the first opening is communicated with the second opening.

9. The display panel according to claim 8, wherein a height of the second opening is smaller than a height of the first organic layer in a direction perpendicular to the substrate base plate.

10. The display panel according to claim 1, wherein the first opening comprises a first end face and a second end face which are oppositely arranged, and the first end face is located on one side of the second end face close to the substrate base plate;

the area of the orthographic projection of the first end face on the substrate base plate is smaller than the area of the orthographic projection of the pixel opening on the substrate base plate.

11. The display panel according to claim 10, wherein in the first opening, an area of an orthogonal projection of the first end face on the substrate base plate is equal.

12. The display panel according to claim 1, wherein the sidewall of the first opening has a linear or arc structure.

13. The display panel of claim 1, wherein an orthographic projection of the anode on the plane of the substrate base plate does not overlap with an orthographic projection of the first opening on the substrate base plate.

14. The display panel according to claim 1, wherein at least a portion of the cathode is located within the first opening.

15. The display panel according to claim 1, wherein an orthographic projection of the first opening on a plane of a substrate does not overlap with an orthographic projection of the gate of the transistor on the plane of the substrate.

16. The display panel according to claim 1, wherein a plurality of the first openings are provided around a channel region of the transistor.

17. The display panel according to claim 1, further comprising a first organic layer between the array layer and the light emitting layer in a direction perpendicular to a plane of the substrate base plate;

the first organic layer includes a first via through which the anode is electrically connected to the transistor;

the orthographic projection area of the first opening hole on the plane of the substrate base plate is larger than that of the first through hole on the plane of the substrate base plate.

18. The display panel according to claim 1, wherein an orthogonal projection of the first opening on the plane of the substrate base plate is at least not overlapped with an orthogonal projection of the pixel opening and the channel region of the transistor on the plane of the substrate base plate.

19. The display panel according to claim 1, wherein the first inorganic layer includes a first portion overlapping the first opening and a second portion overlapping the pixel opening in a direction perpendicular to a plane of the substrate base;

the display panel further comprises a first organic layer, wherein the first organic layer is positioned between the array layer and the light-emitting layer along a direction vertical to the substrate base plate;

in a direction perpendicular to the plane of the substrate base plate, the minimum distance between the surface of the first portion on the side far away from the substrate base plate and the surface of the first organic layer on the side far away from the substrate base plate is different from the minimum distance between the surface of the second portion on the side far away from the substrate base plate and the surface of the first organic layer on the side far away from the substrate base plate.

20. A display device comprising the display panel according to any one of claims 1 to 19.

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