Patent ID: 12213349

DESCRIPTION OF EMBODIMENTS

For better illustrating technical solutions of the present disclosure, embodiments of the present disclosure will be described in detail as follows with reference to the accompanying drawings.

It should be noted that the described embodiments are merely exemplary embodiments of the present disclosure, which shall not be interpreted as providing limitations to the present disclosure. All other embodiments obtained by those skilled in the art without creative efforts according to the embodiments of the present disclosure are within the scope of the present disclosure.

The terms used in the embodiments of the present disclosure are merely for the purpose of describing particular embodiments but not intended to limit the present disclosure. Unless otherwise noted in the context, the singular form expressions “a”, “an”, “the” and “said” used in the embodiments and appended claims of the present disclosure are also intended to represent plural form expressions thereof.

It should be understood that the term “and/or” used herein is merely an association relationship describing associated objects, indicating that there may be three relationships, for example, A and/or B may indicate that three cases, i.e., A existing individually, A and B existing simultaneously, B existing individually. In addition, the character “/” herein generally indicates that the related objects before and after the character form an “or” relationship.

It should be understood that, although the auxiliary-pad layer may be described using the terms of “first”, “second”, “third”, etc., in the embodiments of the present disclosure, the auxiliary-pad layer will not be limited to these terms. These terms are merely used to distinguish auxiliary-pad layers from one another. For example, without departing from the scope of the embodiments of the present disclosure, a first auxiliary-pad layer may also be referred to as a second auxiliary-pad layer, similarly, a second auxiliary-pad layer may also be referred to as a first auxiliary-pad layer.

Depending on the context, the word “if” as used herein may be construed as “at the time when . . . ” or “when . . . ” or “responsive to determination” or “responsive to detection”. Similarly, depending on the context, phrases “if . . . is determined” or “if (a stated condition or event) . . . is detected” may be construed as “when . . . is determined” or “responsive to determination” or “when (a stated condition or event) . . . is detected” or “responsive to detection of (a stated condition or event)”.

Before describing the technical solutions provided in the embodiments of the present disclosure, a structure of an existing display panel will be described in the following in the present disclosure.

As shown inFIG.1, which is a schematic diagram of a structure of layers of a display panel in the related art, the display panel includes a transistor layer1′, a planarization layer2′, a light-emitting device layer3′, and a color filter4′ that are stacked along a light-exiting direction of the display panel. The transistor layer1′ is provided with a plurality of wires, such as wires for forming transistors5′ and various signal lines6′ that are connected to the transistors5′. The light-emitting device layer3′ includes an anode7′, a light-emitting layer8′ and a cathode9′ that are stacked along the light-exiting direction of the display panel. Due to the influence of various wires in the transistor layer1′, the anode7′ has a non-flat surface and it is difficult to form a flat surface. External ambient light reflected by the anode7′ is prone to periodic diffraction, resulting in reflected light spots.

Therefore, an embodiment of the present disclosure provides a display panel. The display panel may be an organic light-emitting display panel. As shown inFIG.2andFIG.3, whereFIG.2is a top view of a display panel according to an embodiment of the present disclosure, andFIG.3is a cross-sectional view along A1-A2shown inFIG.2. The display panel includes a base substrate1. Along a light-exiting direction of the display panel, the base substrate1is successively provided thereon with a transistor layer2, a planarization layer3, and a light-emitting device layer4.

The transistor layer2includes a pixel driving circuit5and various signal lines6electrically connected to the pixel driving circuit5, for example, a gate line for providing a scan signal to the pixel driving circuit5, a data line for providing a data signal to the pixel driving circuit5, a power signal line for providing a power signal to the pixel driving circuit5, and a reference signal line for providing a reference signal to the pixel driving circuit5. The planarization layer3may include only one layer or multiple layers. The light-emitting device layer4includes: an anode7, the anode7being electrically connected to the pixel driving circuit5in the transistor layer2(not illustrated in the figure) and being used for receiving a driving current transmitted by the pixel driving circuit5, the anode7being a reflective electrode formed by an opaque metal material: a pixel definition layer8located at a side of the anode7facing away from the base substrate1, the pixel definition layer8defining an opening region9and a non-opening region10, and part of the anode7being exposed in the opening region9: a light-emitting layer11that is located at a side of the anode7and the pixel definition layer8facing away from the base substrate1and corresponds to the opening region9; and a cathode12located at a side of the pixel definition layer8and the light-emitting layer11facing away from the base substrate1, the cathode12being a transparent electrode formed by a transparent and electron-conductive material such as indium tin oxide.

In addition, the display panel further includes a first auxiliary-pad layer13. The first auxiliary-pad layer13is located at a side of at least one planarization layer3facing the base substrate1. When viewed from a direction perpendicular to a plane of the base substrate1, the first auxiliary-pad layer13does not overlap with the opening region9, and the first auxiliary-pad layer13extends along an extension direction of at least part of an edge of the opening region9.

In this embodiment of the present disclosure, the first auxiliary-pad layer13does not overlap with the opening region9and extends along at least part of an edge of the opening region9. That is, the first auxiliary-pad layer13is arranged in the non-opening region10to surround or semi-surround the opening region9. When the first auxiliary-pad layer13is coated with an organic material to form the planarization layer3, since the organic material has a certain fluidity, the first auxiliary-pad layer13may guide flowing of the organic material to some extent, making part of the organic material more prone to flow from the top of the first auxiliary-pad layer13to a region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13, thereby thickening the planarization layer3in this region. A thicker planarization layer3can additionally reduce non-flatness of an upper surface of the planarization layer3, that is, of a surface of a side of the planarization layer3facing away from the base substrate1, caused by a signal line6below the planarization layer3, thereby reducing the non-flatness of the upper surface of the planarization layer3. Moreover, with reference to the top view of the display panel shown inFIG.2, from a macro perspective, a plurality of first auxiliary-pad layers13are densely and evenly distributed in the whole display region, and the plurality of first auxiliary-pad layers13may macroscopically improve the film-forming flatness of the whole planarization layer3, thereby enabling the upper surface of the planarization layer3to be flat as a whole.

As it can be seen that in this embodiment of the present disclosure, the first auxiliary-pad layer13can be used to improve the film-forming flatness of the planarization layer3. Moreover, the planarization layer3is also used for bearing the anode7, therefore, when the anode7is subsequently formed above the planarization layer3by evaporation, the flatness of the evaporated anode7can be effectively improved. When external ambient light is reflected by the anode7, periodic diffraction of the reflected light caused by the non-flatness of the anode7can be effectively weakened (reduced), and reflected light spots can be weakened (reduced) or even eliminated, thereby improving user experience.

In addition, it needs to be further noted that in this embodiment of the present disclosure, the first auxiliary-pad layer13does not overlap with the opening region9, the first auxiliary-pad layer13extends, in the non-opening region10, along at least part of an edge of the opening region9. This not only can make a region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13cover the entire opening region9to effectively improve the flatness of the planarization layer3at a position of the entire opening region9, but also can avoid influence of the first auxiliary-pad layer13on the flatness of the light-emitting layer11arranged in the opening region9and then avoid a color offset caused by the non-flatness of the light-emitting layer11.

In an embodiment, as shown inFIG.4andFIG.5, whereFIG.4is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, andFIG.5is a cross-sectional view along B1-B2shown inFIG.4, the transistor layer2includes an active layer14, a gate layer15, and a source-drain layer16successively arranged along the light-exiting direction of the display panel. To improve the reliability of a connection between the source-drain layer16and the anode7, the display panel further includes an auxiliary connection layer17. The auxiliary connection layer17is located between the source-drain layer16and the anode7, and the source-drain layer16is electrically connected to the anode7through the auxiliary connection layer17. Based on this, in this embodiment of the present disclosure, the first auxiliary-pad layer13may be formed by an electron-conductive material, and part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17.

That is, part of the first auxiliary-pad layer13extends along at least part of an edge of the opening region9to increase a thickness of the planarization layer3below the anode7, and the other part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17and is respectively electrically connected to the source-drain layer16and the anode7via a through-hole, to improve the reliability of the connection between the source-drain layer16and the anode7. The first auxiliary-pad layer13plays roles of optimizing the flatness of the planarization layer3and improving the signal transmission quality. Moreover, the first auxiliary-pad layer13and the auxiliary connection layer17can be formed by a same formation process and occupy a space of only one layer, which not only reduces a production process and reduces production costs, but also is more conducive to the thinning design of the display panel.

It needs to be noted that, referring toFIG.4andFIG.5again, the anode7is electrically connected to the auxiliary connection layer17through a first through-hole18. The auxiliary connection layer17is electrically connected to the source-drain layer16through a second through-hole19. When viewing from a direction perpendicular to the plane of the base substrate1, the first through-hole18may not be aligned to the second through-hole19.

It should be understood that when an auxiliary connection layer17is arranged between the source-drain layer16and the anode7and part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17, the planarization layer3includes at least two layers. Moreover, a plurality of planarization layers3may be arranged between the first auxiliary-pad layer13and the anode7.

In this embodiment of the present disclosure, referring toFIG.5again, the planarization layer3includes a first planarization layer20and a second planarization layer21that are stacked. The first auxiliary-pad layer13is located between the first planarization layer20and the second planarization layer21. Based on this structure, only one second planarization layer21is arranged between the first auxiliary-pad layer13and the anode7. The film-forming flatness of the second planarization layer21is optimized by using the first auxiliary-pad layer13, so that after an upper surface of the second planarization layer21tends to be flat, the anode7is directly formed above the second planarization layer21by evaporation. No other film layer is arranged between the second planarization layer21and anode7, so the second planarization layer21can be used to significantly improve the flatness of the anode7. Moreover, in such a configuration, the planarization layer3includes only two layers, so an overall layer thickness will not be excessive, and the influence on the thickness of the display panel can be reduced.

In one embodiment, as shown inFIG.6andFIG.7, whereFIG.6is a top view of a second auxiliary-pad layer22according to an embodiment of the present disclosure, andFIG.7is a cross-sectional view along C1-C2shown inFIG.6. The display panel further includes a second auxiliary-pad layer22arranged in the same layer as the first auxiliary-pad layer13. When viewed from the direction perpendicular to the plane of the base substrate1, the second auxiliary-pad layer22is located between two adjacent opening regions9in a first direction and/or in a second direction, and the second auxiliary-pad layer is connected to at most one first auxiliary-pad layer13. The first direction intersects the second direction. In an example, the first direction is an extension direction of the gate line, and the second direction is an extension direction of the data line: or the first direction is an extension direction of the data line, and the second direction is an extension direction of the gate line.

By further providing the second auxiliary-pad layer22to surround the first auxiliary-pad layer13, when an organic material is coated to form the planarization layer3, the second auxiliary-pad layer22occupies a flowing space of part of the organic material, so that most of the organic material flows into a region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13to thicken the planarization layer3in this region to a greater extent. Moreover, the second auxiliary-pad layer22can make the deviated organic material flow back to the region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13, and at the same time, can avoid excessive accumulation of the organic material at an edge of the anode7in the non-opening region or at an edge of the anode in the opening region9, thereby more effectively weakening non-flatness of an upper surface of the planarization layer3and thus improving the flatness of the anode7.

Moreover, when part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17and the first auxiliary-pad layer13is connected to the second auxiliary-pad layer22, equivalent load resistance of the first auxiliary-pad layer13is reduced. When a current driving signal of the source-drain layer16is transmitted to the anode7through the part of the first auxiliary-pad layer13which is reused as the auxiliary connection layer17, voltage drop of the signal can be reduced, thereby improving the accuracy of luminance of the light-emitting device.

In one embodiment, as shown inFIG.8andFIG.9, whereFIG.8is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, andFIG.9is another schematic structural diagram of a first auxiliary-pad layer13according to an embodiment of the present disclosure, the first auxiliary-pad layer13is arranged to surround the opening region9. In this case, the first auxiliary-pad layer13is a closed pad layer structure surrounding the opening region9. The first auxiliary-pad layer13has a more obvious guiding effect on the flowing of the organic material for forming the planarization layer3, thereby further significantly improving the film-forming flatness of the planarization layer3and further improving the flatness of the anode7to a greater extent.

In another embodiment, the first auxiliary-pad layer13may also be a non-closed pad layer structure surrounding the opening region9. For example, as shown inFIG.10andFIG.11, whereFIG.10is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, andFIG.11is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, the first auxiliary-pad layer13includes a plurality of auxiliary-pad layer portions23. The plurality of auxiliary-pad layer portions23are arranged along the edge of the opening region9, and two adjacent auxiliary-pad layer portions23are spaced apart from each other. In this case, the first auxiliary-pad layer13is still arranged to surround the entire opening region9, and the first auxiliary-pad layer13still can have a guiding effect on the flowing of the organic material for forming the planarization layer3, thereby improving the film-forming flatness of the planarization layer3.

In addition, it needs to be further noted that in the layout design of different display panels, the signal lines6and the pixel driving circuits5in the respective transistor layers2are arranged at different positions, so the wirings in the respective transistor layers2have different effects on the flatness of the respective anodes7.

For example, when part of the signal lines6in the transistor layer2, such as the data line Data and the power signal line PVDD, extend through the opening region9, the wiring of this part of lines may raise a local position of the planarization layer3. After the thickness of the planarization layer3is increased by using the first auxiliary-pad layer13, the planarization layer3may bulge upward still at positions of the data line Data and the power signal line PVDD. Therefore, in combination withFIG.8andFIG.10, as shown inFIG.12, which is a cross-sectional view along D1-D2shown inFIG.8, the first auxiliary-pad layer13may overlap with a part of the anode7which is located in the non-opening region10. In this case, the first auxiliary-pad layer13can further raise an edge part of the anode7overlapping with it, thereby compensating for a height difference of bulge of a middle part of the anode7caused by the data line Data and the power signal line PVDD and thus further optimizing the overall flatness of the anode7.

It needs to be noted that when the data line Data and the power signal line PVDD extend through the opening region9, the first auxiliary-pad layer13may be arranged in a manner as shown inFIG.8. The first auxiliary-pad layer13is a closed pad layer structure overlapping with the edge part of the anode7, so that the edge part of the anode7can be raised in an all-round way by using the first auxiliary-pad layer13, thereby weakening a height difference at each position of the middle part and the edge part of the anode7in an all-round way.

In addition, it needs to be further noted that when part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17, the part of the first auxiliary-pad layer13overlapping with the edge part of the anode7may further play a role of shielding electrodes to avoid signal interference between adjacent anodes7, thereby improving the accuracy of a signal transmitted on the anodes7.

Further, referring toFIG.12again, when viewing from the direction perpendicular to the plane of the base substrate1, a minimum distance between the first auxiliary-pad layer13and the opening region9is greater than 2 μm. It should be noted that referring toFIG.12again, when a groove in the pixel definition layer8is used for defining the opening region9is in a shape of an inverted trapezoidal, the opening region9in this embodiment of the present disclosure refers to a region defined by an edge of a surface of the pixel definition layer8at a side of the pixel definition layer8facing away from the base substrate1. That is, the minimum distance between the first auxiliary-pad layer13and the opening region9refers to a minimum distance, when viewing from the direction perpendicular to the plane of the base substrate1, between the first auxiliary-pad layer13and the edge of the surface of the pixel definition layer8at a side of the pixel definition layer8facing away from the base substrate1. In addition, it needs to be further noted that, when part of the first auxiliary-pad layer13is reused as the auxiliary connection layer17, the minimum distance d1between the first auxiliary-pad layer13and the opening region9being greater than 2 μm is not used for defining a distance between the part of the first auxiliary-pad layer13reused as the auxiliary connection layer17and the opening region9.

It should be understood that an actual formation position of the first auxiliary-pad layer13may change due to influence of factors such as process accuracy. If the distance between the first auxiliary-pad layer13and the opening region9is too small, the position of the first auxiliary-pad layer13may overlap with the opening region9after moving toward the opening region9. In this case, the first auxiliary-pad layer13may affect flatness of the light-emitting layer11arranged in the opening region9. In this embodiment of the present disclosure, the minimum distance d1between the first auxiliary-pad layer13and the opening region9is greater than 2 μm, which is greater than a process error, therefore, even if the position of the first auxiliary-pad layer13moves toward the opening region9, a risk of the first auxiliary-pad layer13overlapping with the opening region9can still be reduced, thereby avoiding the problem such as a color offset caused by the non-flatness of the light-emitting layer11.

In addition, it needs to be further noted that, in order to achieve color display, the opening region9defined by pixel definition layer8includes a red opening region for emitting red light, a green opening region for emitting green light, and a blue opening region for emitting blue light. In actual applications, on a precondition that the minimum distance d1between the first auxiliary-pad layer13and each opening region9is greater than 2 μm, a distance between the first auxiliary-pad layer13and the red opening region, a distance between the first auxiliary-pad layer13and the green opening region, and a distance between the first auxiliary-pad layer13and the blue opening region may be equal to each other or different from each other.

Further, as shown inFIG.13, which is a schematic structural diagram of a third auxiliary-pad layer according to an embodiment of the present disclosure, due to the influence of the wiring below the anode7, a local portion of the anode7in the opening region9bulges upward, and the anode7has a maximum height difference D. Therefore, the display panel further includes a third auxiliary-pad layer24. When viewing from the direction perpendicular to the plane of the base substrate1, the third auxiliary-pad layer24overlaps with the first auxiliary-pad layer13, and a sum of a thicknesses of the third auxiliary-pad layer24and a thickness of the first auxiliary-pad layer13is equal to the maximum height difference D.

If the maximum height difference D of the anode7is relatively large, it is difficult for a layer thickness of a single first auxiliary-pad layer13to compensate for. Therefore, a third auxiliary-pad layer24may be superimposed at the position of the first auxiliary-pad layer13, then a sum of a thicknesses of the first auxiliary-pad layer13and a thickness of the third auxiliary-pad layer24can be used to compensate for the maximum height difference D of the anode7in the opening region9, so as to fully raise the edge part of the anode7and then reduce, to a greater extent, the non-flatness between the edge part and the middle part of the anode7.

In one embodiment, the non-flatness between the middle part and the edge part of the anode7is smaller, so that after the thickness of the planarization layer3is increased by using the first auxiliary-pad layer13, the planarization layer3tends to be flat and then the anode7tends to be flat. Therefore, there is no need to use the first auxiliary-pad layer13to raise the edge part of the anode7too high. In this case, referring toFIG.9andFIG.11again, as shown inFIG.14, which is a cross-sectional view along E1-E2shown inFIG.9, the first auxiliary-pad layer13does not overlap with the part of the anode7in the non-opening region10, and the overall flatness of the anode7is improved only by optimizing the film-forming flatness of the planarization layer3.

Further, in order to avoid affecting the flatness of the anode7due to the overlap between the first auxiliary-pad layer13and the edge part of the anode7caused by factors such as process accuracy, referring toFIG.14again, when viewing from the direction perpendicular to the plane of the base substrate1, a minimum distance d2between the first auxiliary-pad layer13and the anode7can be greater than 2 μm.

In one embodiment, as shown inFIG.15, which is a top view of a fourth auxiliary-pad layer25according to an embodiment of the present disclosure, the display panel further includes a fourth auxiliary-pad layer25. The fourth auxiliary-pad layer25is located at a side of at least one planarization layer3facing the base substrate1. When viewed from the direction perpendicular to the plane of the base substrate1, the fourth auxiliary-pad layer25is located between two adjacent opening regions9in a first direction and/or in a second direction. After the fourth auxiliary-pad layer25is further provided to surround the first auxiliary-pad layer13, when coating an organic material to form the planarization layer3, most of the organic material can flow into a region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13, thereby thickening the planarization layer3in this region to a greater extent, which more significantly optimizes the film-forming flatness of the planarization layer3and thus improves the flatness of the anode.

Further, as shown inFIG.16, which is a cross-sectional view along F1-F2shown inFIG.15, to simplify a production process of the fourth auxiliary-pad layer25, the fourth auxiliary-pad layer25may be arranged in the same layer as the first auxiliary-pad layer13. Moreover, two adjacent first auxiliary-pad layers13are connected through the fourth auxiliary-pad layer. In this case, the fourth auxiliary-pad layer25and the first auxiliary-pad layers13are connected together. As a result, there is no gap between the fourth auxiliary-pad layer25and the first auxiliary-pad layers13, and the organic material for forming the planarization layer3is more prone to flow toward the region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13, thereby further thickening the planarization layer3below the anode7.

In one embodiment, as shown inFIG.17andFIG.18, whereFIG.17is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, andFIG.18is another top view of a first auxiliary-pad layer13according to an embodiment of the present disclosure, the display panel further includes a line-changing through-hole26arranged adjacent to the opening region9. The line-changing through-hole26runs through the planarization layer3. For example, the line-changing through-hole26may be a through-hole between the anode7and the source-drain layer16. When the first auxiliary-pad layer13extends along an edge of the opening region9, the first auxiliary-pad layer13may bypass the line-changing through-hole26so as to avoid the influence of the first auxiliary-pad layer13on the through-hole. For example, referring toFIG.17again, the first auxiliary-pad layer13is discontinuous at a position of the line-changing through-hole26: or referring toFIG.18again, the first auxiliary-pad layer13is wound along one side of the line-changing through-hole26away from the opening region9. When the first auxiliary-pad layer13is wound along one side of the line-changing through-hole26away from the opening region9, the first auxiliary-pad layer13may be further electrically connected to a fixed-potential signal end, so that the first auxiliary-pad layer13plays a role of shielding electrodes and shielding the influence of other signals on a signal that is transmitted by the line-changing through-hole26.

It should be understood that when the first auxiliary-pad layer13is discontinuous or wound at the line-changing through-hole26, the fourth auxiliary-pad layer25may still be further arranged to surround the first auxiliary-pad layer13as shown inFIG.15. The first auxiliary-pad layer13is in communication with the fourth auxiliary-pad layer25, to further improve the film-forming flatness of the planarization layer3.

In one embodiment, as shown inFIG.19, which is another cross-sectional view along A1-A2shown inFIG.2, the transistor layer2includes an active layer14, a gate layer15, and a source-drain layer16that are successively arranged along the light-exiting direction, and the first auxiliary-pad layer13is arranged in the same layer as the source-drain layer16. In this case, the first auxiliary-pad layer13and the source-drain layer16can be formed by a same formation process, thereby saving a production process for additionally forming the first auxiliary-pad layer13and reducing production costs. It needs to be noted that when the first auxiliary-pad layer13is arranged in the same layer as the source-drain layer16, only one planarization layer3may be provided between the source-drain layer16and the anode7, and the planarization layer3is in direct contact with the first auxiliary-pad layer13and the anode7, respectively. After the first auxiliary-pad layer13optimizes the flatness of the planarization layer3, the flatness of the anode7is optimized directly by using the optimized flatness of the planarization layer3, which can significantly improve the flatness of the anode7. Moreover, a single planarization layer3does not have an extremely large thickness, which is more conducive to the thinning design of the display panel.

In one embodiment, a width of the first auxiliary-pad layer13in a direction perpendicular to an extension direction thereof is positively correlated with a width of the non-opening region10where the first auxiliary-pad layer13is located. If the width of the non-opening region10where the first auxiliary-pad layer13is located is large, the width of the first auxiliary-pad layer13may be set to be larger, so as to improve the film-forming flatness of the planarization layer3to a greater extent. If the width of the non-opening region10where the first auxiliary-pad layer13is located is small, the width of the first auxiliary-pad layer13may be set to be smaller, so as to avoid affecting the flatness of the light-emitting layer8in the opening region9due to the overlap between the first auxiliary-pad layer13and the opening region9caused by the influence of factors such as process accuracy.

In one embodiment, as shown inFIG.20, which is a schematic diagram of a shape of an anode7according to an embodiment of the present disclosure, at least part of an edge of the anode7is non-linear, so as to break periodic diffraction of reflected light reflected by the anode7, and to avoid subsequent constructive interference and cancellation interference and weaken the light spots.

Further, on the basis of alleviating the diffraction, the edge of the anode7has a shape of polyline or wavy line so as to improve the regularity of the shape of the anode7.

Based on the same inventive concept, an embodiment of the present disclosure further provides a display device. As shown inFIG.21, which is a schematic structural diagram of a display device according to an embodiment of the present disclosure, the display device includes the display panel100described above. A detailed structure of the display panel100has been described in the above embodiments, and will not be repeated herein. It should be noted that, the display device shown inFIG.21is merely schematic, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an e-book, or a television.

Since the display device according to this embodiment of the present disclosure includes the display panel100described above, in the display device, the first auxiliary-pad layer13is arranged in the non-opening region10to surround or semi-surround the opening region9. When the first auxiliary-pad layer13is coated with an organic material to form the planarization layer3, part of the organic material is prone to flow from the top of the first auxiliary-pad layer13to a region circumscribed by or semi-circumscribed by the first auxiliary-pad layer13, thereby thickening the planarization layer3in this region. A thicker planarization layer3can lead to a greater flatness of an upper surface of the planarization layer3, that is, of a surface of the planarization layer3at a side of the planarization layer3facing away from the base substrate1, caused by a signal line6below the planarization layer3. This results in further weakening (reducing) the non-flatness of the upper surface of the planarization layer3, so as to make the upper surface of the planarization layer3tend to be flat as a whole. Then, when an anode7is subsequently formed above the planarization layer3by evaporation, the flatness of the evaporated anode7can be improved, and when external ambient light is reflected by the anode7a periodic diffraction of the reflected light caused by the non-flatness of the anode7can be effectively weakened, and the reflected light spots can be weakened or even eliminated, thereby improving user experience.

The above-described embodiments are merely preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions and improvements made within the principle of the present disclosure shall fall into the protection scope of the present disclosure.

Finally, it should be noted that, the above-described embodiments are merely for illustrating the present disclosure but not intended to provide any limitation. Although the present disclosure has been described in detail with reference to the above-described embodiments, it should be understood by those skilled in the art that, it is still possible to modify the technical solutions described in the above embodiments or to equivalently replace some or all of the technical features therein, but these modifications or replacements do not cause the essence of corresponding technical solutions to depart from the scope of the present disclosure.