Display panel and display device

Abstract

The invention discloses a display panel and a display device. The cover plate display panel is provided with a display area and a non-display area located on the peripheral side of the display area, the display panel comprises a substrate, a first light-emitting layer, a common layer, a second light-emitting layer and a first conductive part, the first light-emitting layer is arranged on one side of the substrate, and at least part of the first light-emitting layer is located in the display area; the common layer is arranged on the side, away from the substrate, of the first light-emitting layer. The second light-emitting layer is arranged on the side, away from the substrate, of the common layer. The first conductive part is located in the non-display area, the common layer extends from the display area to the non-display area and is connected with the first conductive part, and the first conductive part is used for participating in controlling the potential of the common layer. The display panel provided by the embodiment of the invention has a relatively good display effect.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular, relates to a display panel and a display device. Background Art

[0002] With the continuous development of technology, more and more display panels use tandem OLED technology to emit light. The stacking and series connection of multiple layers of OLED devices can greatly improve the luminous efficiency and service life of the display panel.

[0003] However, display panels using tandem OLED technology are prone to lateral leakage problems, that is, when a certain sub-pixel is lit, the sub-pixels around the sub-pixel are also likely to be lit, making the display panel prone to color cast problems. Summary of the invention

[0004] Embodiments of the present application provide a display panel and a display device, aiming to improve the display effect of the display panel.

[0005] In a first aspect, an embodiment of the present application provides a display panel, which has a display area and a non-display area located on the periphery of the display area. The display panel includes a substrate, a first light-emitting layer, a common layer, a second light-emitting layer and a first conductive portion. The first light-emitting layer is arranged on one side of the substrate and is at least partially located in the display area; the common layer is arranged on the side of the first light-emitting layer away from the substrate; the second light-emitting layer is arranged on the side of the common layer away from the substrate; the first conductive portion is located in the non-display area, the common layer extends from the display area to the non-display area and is connected to the first conductive portion, and the first conductive portion is used to participate in controlling the potential of the common layer.

[0006] In a second aspect, an embodiment of the present application provides a display device, and the display device includes the display panel in the embodiment of the first aspect mentioned above.

[0007] A display panel provided in an embodiment of the present application has a display area and a non-display area located on the periphery of the display area, and the display panel includes a substrate, a first light-emitting layer, a common layer, a second light-emitting layer, and a first conductive portion. The first light-emitting layer is arranged on one side of the substrate and at least partially located in the display area, and the first light-emitting layer can be used to realize the light-emitting display of the display panel, the common layer is arranged on the side of the first light-emitting layer away from the substrate, and the second light-emitting layer is arranged on the side of the common layer away from the substrate, and the second light-emitting layer can also be used to realize the display panel. The common layer can be used to conduct the first light-emitting layer and the second light-emitting layer, that is, the first light-emitting layer and the second light-emitting layer can be connected in series through the common layer, so as to better improve the light-emitting efficiency and service life of the display panel.

[0008] The first conductive portion is located in the non-display area, the common layer extends from the display area to the non-display area and is connected to the first conductive portion, and the first conductive portion is used to participate in controlling the potential of the common layer, so that the first conductive portion can be used to participate in controlling the current connection and disconnection relationship between the first light-emitting layer and the second light-emitting layer, so that in certain specific cases, the first conductive portion can be used to participate in controlling the potential of the common layer, so that the second light-emitting layer of at least some sub-pixels cannot receive current through the common layer to emit light, so that the second light-emitting layer of the sub-pixels that do not need to emit light on the side of the sub-pixels is not easily lit by the current in the common layer, which can better reduce the color deviation of the display panel and improve the display effect of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 is a structural schematic diagram of a display panel provided in an embodiment of the present application;

[0011] Figure 2 is a partial cross-sectional view of a display panel provided in an embodiment of the present application;

[0012] Figure 3 It is a structural schematic diagram of a pixel definition layer, a light-emitting unit and a first conductive portion provided in an embodiment of the present application;

[0013] Figure 4 It is a structural schematic diagram of a common layer, a light-emitting unit and a first conductive portion provided in an embodiment of the present application;

[0014] Figure 5 is a structural schematic diagram of a common layer, a light-emitting unit and a first conductive portion provided by another embodiment of the present application;

[0015] Figure 6 is a structural schematic diagram of a common layer, a light-emitting unit and a first conductive portion provided by yet another embodiment of the present application;

[0016] Figure 7 is a partial cross-sectional view of a display panel provided by another embodiment of the present application;

[0017] Figures 8 to 11 is a schematic diagram of a manufacturing process of a method for manufacturing a display panel provided in an embodiment of the present application;

[0018] Fig.12 is a partial cross-sectional view of a display panel provided in yet another embodiment of the present application;

[0019] Fig.13 is a partial structural schematic diagram of a first conductive portion provided in an embodiment of the present application;

[0020] Fig.14 It is a schematic diagram of the partial structure of a light-emitting unit provided in an embodiment of the present application.

[0021] Description of reference numerals:

[0022] 10- Display panel;

[0023] 100-substrate;

[0024] 200-second electrode layer; 210-second electrode;

[0025] 300-pixel definition layer; 310-pixel definition portion; 320-pixel opening;

[0026] 400 - first light-emitting layer; 410 - first light-emitting structure; 420 - first common layer;

[0027] 500-common layer; 510-common sub-section;

[0028] 600-second light-emitting layer; 610-second light-emitting structure; 620-second common layer;

[0029] 700- first electrode layer;

[0030] EU-light-emitting unit; EU1-first type unit; EU2-second type unit;

[0031] L1-first conductive part; L1a-through hole; L11-conductive part;

[0032] L2-second conductive part;

[0033] P-protection structure;

[0034] AA-display area;

[0035] NA-non-display area;

[0036] X-first direction; Y-second direction; Z-thickness direction. DETAILED DESCRIPTION

[0037] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended only to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0038] It should be noted that, in this article, unless otherwise specified, the meaning of "multiple" is more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inside", "outside", etc. is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "include..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0039] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the embodiments of the present application. In the description of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0040] With the continuous development of technology, more and more display panels use tandem OLED technology to emit light. The stacking and tandem connection of multiple layers of OLED devices can greatly improve the luminous efficiency and service life of the display panel. However, display panels using tandem OLED technology are prone to lateral leakage problems, that is, when a sub-pixel is lit, the sub-pixels around the sub-pixel are also prone to be lit, making the display panel prone to color cast problems.

[0041] For example, when lateral leakage occurs between some sub-pixels and the sub-pixels on their surrounding sides, and these sub-pixels are in a low grayscale, the brightness difference between these sub-pixels and the sub-pixels on their surrounding sides that are illuminated by the leakage current is small, resulting in obvious color deviation of the display panel, which can easily reduce the display effect of the display panel.

[0042] In order to solve the above technical problems, the present application is provided. In order to better understand the present application, the display panel and the display device of the present application are described in detail below in conjunction with the accompanying drawings.

[0043] Figure 1 is a schematic structural diagram of a display panel 10 provided in an embodiment of the present application, Figure 2 1 is a partial cross-sectional view of a display panel 10 provided in an embodiment of the present application. The X direction in the figure is the first direction, the Y direction in the figure is the second direction, and the Z direction in the figure is the thickness direction of the display panel 10. The first direction X, the second direction Y, and the thickness direction Z of the display panel 10 may intersect in pairs, for example, the first direction X, the second direction Y, and the thickness direction Z of the display panel 10 may be perpendicular in pairs.

[0044] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a display panel 10, which has a display area AA and a non-display area NA located on the periphery of the display area AA. The display panel 10 includes a substrate 100, a first light-emitting layer 400, a common layer 500, a second light-emitting layer 600 and a first conductive portion L1. The first light-emitting layer 400 is arranged on one side of the substrate 100 and is at least partially located in the display area AA; the common layer 500 is arranged on the side of the first light-emitting layer 400 away from the substrate 100; the second light-emitting layer 600 is arranged on the side of the common layer 500 away from the substrate 100; the first conductive portion L1 is located in the non-display area NA, the common layer 500 extends from the display area AA to the non-display area NA and is connected to the first conductive portion L1, and the first conductive portion L1 is used to participate in controlling the potential of the common layer 500.

[0045] A display panel 10 provided in an embodiment of the present application has a display area AA and a non-display area NA located on the periphery of the display area AA. The display panel 10 includes a substrate 100, a first light-emitting layer 400, a common layer 500, a second light-emitting layer 600, and a first conductive portion L1. The first light-emitting layer 400 is disposed on one side of the substrate 100 and is at least partially located in the display area AA. The first light-emitting layer 400 can be used to realize the light-emitting display of the display panel 10. The common layer 500 is disposed on the side of the first light-emitting layer 400 away from the substrate 100. The second light-emitting layer 600 is disposed on the side of the common layer 500 away from the substrate 100. The second light-emitting layer 600 can also be used to realize the display panel 10. The common layer 500 can be used to conduct the first light-emitting layer 400 and the second light-emitting layer 600, that is, the first light-emitting layer 400 and the second light-emitting layer 600 can be connected in series through the common layer 500, so as to better improve the light-emitting efficiency and service life of the display panel 10.

[0046] The first conductive portion L1 is located in the non-display area NA, and the common layer 500 extends from the display area AA to the non-display area NA and is connected to the first conductive portion L1. The first conductive portion L1 is used to participate in controlling the potential of the common layer 500, so that the first conductive portion L1 can be used to participate in controlling the current connection and disconnection relationship between the first light-emitting layer 400 and the second light-emitting layer 600, so that in certain specific cases, the first conductive portion L1 can be used to participate in controlling the potential of the common layer 500, so that the second light-emitting layer 600 of at least some sub-pixels cannot receive current through the common layer 500 to emit light, thereby making the second light-emitting layer 600 of the sub-pixels that do not need to emit light on the side of the sub-pixels that are not easily illuminated by the current in the common layer 500, which can better reduce the color deviation of the display panel 10 and improve the display effect of the display panel 10.

[0047] Exemplarily, certain specific situations may refer to when some sub-pixels of the display panel 10 need to be at a lower grayscale. Specifically, when some sub-pixels of the display panel 10 need to be at a lower grayscale, the first conductive portion L1 can be used to participate in controlling the potential of the common layer 500, so that the second light-emitting layer 600 of at least some of the sub-pixels cannot receive current through the common layer 500 to emit light, thereby facilitating the reduction of the light-emitting brightness of the part of the sub-pixels, and also making it difficult for the second light-emitting layer 600 of the sub-pixels on the side of the part of the sub-pixels that do not need to emit light to be illuminated by the current in the common layer 500, so that the sub-pixels at a lower grayscale in the display panel 10 and the sub-pixels on their side that do not need to emit light can have a larger brightness difference, thereby better reducing the color deviation of the display panel 10 and improving the display effect of the display panel 10.

[0048] In some embodiments of the present application, the common layer 500 may serve as a charge-generation layer (CGL) of the display panel 10 , so that the first light-emitting layer 400 and the second light-emitting layer 600 may be connected in series through the common layer 500 .

[0049] Optionally, the first conductive portion L1 is used to participate in controlling the potential of the common layer 500 , which may mean that the first conductive portion L1 can be used to participate in transmitting signals of different magnitudes to the common layer 500 to achieve potential control of the common layer 500 .

[0050] Optionally, the display panel 10 further includes a first electrode layer 700 disposed on the side of the second light emitting layer 600 away from the substrate 100 and a second electrode layer 200 disposed on one side of the substrate 100. The first light emitting layer 400, the common layer 500 and the second light emitting layer 600 may be located between the first electrode layer 700 and the second electrode layer 200.

[0051] Optionally, the first electrode layer 700 and the second electrode layer 200 can be used as pixel electrode layers of the display panel 10. For example, one of the first electrode layer 700 and the second electrode layer 200 can be used as an anode layer, and the other can be used as a cathode layer to drive the first light-emitting layer 400 and the second light-emitting layer 600 to emit light. In the embodiment of the present application, the first electrode layer 700 is used as the cathode layer of the display panel 10, and the second electrode layer 200 is used as the anode layer of the display panel 10 for example. Exemplarily, the first electrode layer 700 can be used as an anode for driving the first light-emitting layer 400 to emit light, and the common layer 500 can be used as a cathode for driving the first light-emitting layer 400 to emit light. In addition, the common layer 500 can also be used as an anode for driving the second light-emitting layer 600 to emit light, and the second electrode layer 200 can be used as a cathode for driving the second light-emitting layer 600 to emit light.

[0052] In some embodiments of the present application, when the display panel 10 performs light-emitting display, the potential of the second electrode layer 200 corresponding to the light-emitting position may be greater than the potential of the first electrode layer 700, so that the current used to drive the display panel 10 to perform light-emitting display can flow from the second electrode layer 200 to the first light-emitting layer 400.

[0053] Among them, when the first conductive part L1 participates in controlling the potential of the common layer 500 to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200, for example, when the signal value transmitted to the common layer 500 by the first conductive part L1 is adjusted so that the potential of the common layer 500 is less than the potential of the second electrode layer 200 and greater than the potential of the first electrode layer 700, the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the common layer 500 can be connected in series through the common layer 500, so that the current in the second electrode layer 200 can simultaneously light up the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the common layer 500, which can greatly improve the light-emitting efficiency and service life of the display panel 10.

[0054] Similarly, when the first conductive part L1 is controlled to stop transmitting signals to the common layer 500 so that the common layer 500 is suspended, the common layer 500 can only serve as a conductor, and the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the common layer 500 can also be connected in series through the common layer 500, so that the current in the second electrode layer 200 can simultaneously light up the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the common layer 500, which can greatly improve the light-emitting efficiency and service life of the display panel 10.

[0055] When the first conductive portion L1 participates in controlling the potential of the common layer 500 to be less than or equal to the potential of the first electrode layer 700, for example, when the signal value transmitted by the first conductive portion L1 to the common layer 500 is adjusted so that the potential of the common layer 500 is less than the potential of the second electrode layer 200, and the potential of the common layer 500 is less than or equal to the potential of the first electrode layer 700, the first light-emitting layer 400 and the second light-emitting layer 600 cannot be connected in series through the common layer 500. Specifically, the current in the second electrode layer 200 can light up the first light-emitting layer 400, but at this time the current cannot light up the second light-emitting layer 600 through the common layer 500, so that the second light-emitting layer 600 on one side of the common layer 500 cannot emit light, so that during the light-emitting display process of the display panel 10, the second light-emitting layer 600 is not easily lit due to the lateral leakage of the common layer 500, thereby being able to better reduce the color deviation of the display panel 10 and improve the display effect of the display panel 10.

[0056] In some optional embodiments, the potential of the common layer 500 may be controlled according to the display requirements of each sub-pixel of the display panel 10 .

[0057] For example, in non-specific circumstances, when some sub-pixels in the display panel 10 need to be at a higher grayscale, for example, when a certain number of sub-pixels in the display panel 10 need to be at a higher grayscale, the first conductive portion L1 can be used to participate in controlling the potential of at least part of the common layer 500 to be between the first electrode layer 700 and the second electrode layer 200, or the first conductive portion L1 can stop transmitting signals to at least part of the common layer 500, so that the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of at least part of the common layer 500 can be connected in series through the common layer 500, so as to improve the light-emitting efficiency and service life of the display panel 10. In addition, since there can be a large brightness difference between the sub-pixels at a high grayscale and the sub-pixels on their surroundings that do not need to emit light, the color deviation of the display panel 10 can be reduced well, and the display effect of the display panel 10 can be improved.

[0058] Exemplarily, in certain circumstances, when some sub-pixels in the display panel 10 need to be at a lower grayscale, for example, when a certain number of sub-pixels in the display panel 10 need to be at a lower grayscale, the first conductive portion L1 can be used to participate in controlling the potential of at least part of the common layer 500 to be less than or equal to the potential of the first electrode layer 700, so that the current in the second electrode layer 200 on at least part of the common layer 500 side can illuminate the first light-emitting layer 400, but at this time the current cannot pass through the common layer 500 to illuminate the second light-emitting layer 600, so that the second light-emitting layer 600 on at least part of the common layer 500 side cannot emit light, so that during the light-emitting display process of the display panel 10, the second light-emitting layer 600 is not easily illuminated due to lateral leakage of the common layer 500, so that the sub-pixels at the low grayscale and the sub-pixels on their surrounding sides that do not need to emit light can have a larger brightness difference, thereby better reducing the color deviation of the display panel 10 and improving the display effect of the display panel 10.

[0059] In some optional embodiments, the display panel 10 further includes a pixel definition layer 300 disposed on one side of the substrate 100, and the pixel definition layer 300 includes a pixel defining portion 310 and a plurality of pixel openings 320 located in the display area AA and enclosed by the pixel defining portion 310. The pixel definition layer 300 can be used to participate in dividing the sub-pixels of the display panel 10.

[0060] Optionally, the first light-emitting layer 400 includes a plurality of first light-emitting structures 410 disposed at intervals, and the second light-emitting layer 600 includes a second light-emitting structure 610 located on a side of the first light-emitting structure 410 away from the substrate 100. The number of the second light-emitting structures 610 may also be multiple, and the plurality of second light-emitting structures 610 may be disposed at intervals, and a single second light-emitting structure 610 may be located on a side of a single first light-emitting structure 410 away from the substrate 100, and an orthographic projection of the single second light-emitting structure 610 on the substrate 100 may at least partially overlap with an orthographic projection of the single first light-emitting structure 410 on the substrate 100.

[0061] Optionally, the first light-emitting layer 400 described in the above embodiment is lit and emits light, which specifically refers to the first light-emitting structure 410 in the first light-emitting layer 400 being lit and emits light. Optionally, the second light-emitting layer 600 described in the above embodiment is lit and emits light, which specifically refers to the second light-emitting structure 610 in the second light-emitting layer 600 being lit and emits light.

[0062] Optionally, the display panel 10 may include a light emitting unit EU, and the light emitting unit EU may include a single first light emitting structure 410 and a single second light emitting structure 610 that overlap in orthographic projection on the substrate 100. Specifically, the single light emitting unit EU may include a single first light emitting structure 410 and a single second light emitting structure 610 that overlap in orthographic projection on the substrate 100, that is, the single first light emitting structure 410 and the single second light emitting structure 610 that overlap in orthographic projection on the substrate 100 may form a single light emitting unit EU.

[0063] Optionally, there may be a plurality of light-emitting units EU, and each light-emitting unit EU may be used to participate in forming each sub-pixel.

[0064] Optionally, the light emitting unit EU may be located in the pixel opening 320 . For example, a single light emitting unit EU may be correspondingly disposed in a single pixel opening 320 .

[0065] In some optional embodiments, the first light-emitting layer 400 may further include a first common layer 420, at least a portion of the first common layer 420 may be disposed on a side of the first light-emitting structure 410 facing the substrate 100, and / or at least a portion of the first common layer 420 may be disposed on a side of the first light-emitting structure 410 facing away from the substrate 100.

[0066] Optionally, the first common layer 420 may include at least one of a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL), and an electron transport layer (ETL).

[0067] Optionally, the orthographic projections of the plurality of first light-emitting structures 410 on the substrate 100 may be located within the orthographic projection of a single first common layer 420 on the substrate 100, so that the single first common layer 420 may participate in realizing the light emission of the plurality of first light-emitting structures 410. For example, the orthographic projections of all the first light-emitting structures 410 in the display panel 10 on the substrate 100 may be located within the orthographic projection of the same first common layer 420 on the substrate 100.

[0068] In some optional embodiments, the second light-emitting layer 600 may further include a second common layer 620, at least a portion of the second common layer 620 may be disposed on the side of the second light-emitting structure 610 facing the substrate 100, and / or, at least a portion of the second common layer 620 may be disposed on the side of the second light-emitting structure 610 facing away from the substrate 100.

[0069] Optionally, the second common layer 620 may include at least one of a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer.

[0070] Optionally, the orthographic projections of the plurality of second light-emitting structures 610 on the substrate 100 may be located within the orthographic projection of a single second common layer 620 on the substrate 100, so that the single second common layer 620 may participate in realizing the light emission of the plurality of second light-emitting structures 610. For example, the orthographic projections of all the second light-emitting structures 610 in the display panel 10 on the substrate 100 may be located within the orthographic projection of the same second common layer 620 on the substrate 100.

[0071] Optionally, the second electrode layer 200 includes a plurality of second electrodes 210 spaced apart from each other, a portion of the structure of the second electrode 210 is exposed from the pixel opening 320 and connected to the first light-emitting layer 400, and each second electrode 210 can be used to drive the light emission of the first light-emitting structure 410 and the second light-emitting structure 610 of each sub-pixel, respectively.

[0072] Optionally, the first electrode layer 700 may be a surface electrode, and the orthographic projections of the plurality of first light-emitting structures 410 and the plurality of second light-emitting structures 610 on the substrate 100 may be located within the orthographic projection of the single first electrode layer 700 on the substrate 100, so that the single first electrode layer 700 can participate in realizing the light emission of the plurality of first light-emitting structures 410 and the plurality of second light-emitting structures 610, so as to facilitate the control of the first electrode layer 700. For example, the orthographic projections of all the first light-emitting structures 410 and the second light-emitting structures 610 in the display panel 10 on the substrate 100 are located within the orthographic projection of the single first electrode layer 700 on the substrate 100.

[0073] In some embodiments, the display panel 10 also includes a second conductive portion L2 disposed in the non-display area NA, and the first electrode layer 700 can be connected to the second conductive portion L2, so that the first electrode layer 700 can transmit a power supply voltage signal through the second conductive portion L2. For example, the first electrode layer 700 can transmit a negative power supply voltage signal through the second conductive portion L2.

[0074] Exemplarily, the first electrode layer 700 may extend from the display area AA to the non-display area NA and overlap with the second conductive portion L2.

[0075] Optionally, the second conductive portion L2 may be spaced apart from the first conductive portion L1 , so that the second conductive portion L2 is unlikely to be short-circuited with the first conductive portion L1 , thereby facilitating independent control of the first electrode layer 700 and the common layer 500 .

[0076] Optionally, the second conductive portion L2 may be located on a side of the first conductive portion L1 away from the display area AA to facilitate connection between the common layer and the first conductive portion L1 and to facilitate connection between the first electrode layer 700 and the second conductive portion L2.

[0077] In some optional embodiments, the first light-emitting layer 400 extends from the display area AA to the non-display area NA and is spaced apart from the first conductive portion L1, so that the first light-emitting layer 400 is not likely to affect the connection between the common layer 500 and the first conductive portion L1, so that the common layer 500 can have a larger connection area with the first conductive portion L1.

[0078] Optionally, the first light emitting layer 400 extends from the display area AA to the non-display area NA and is spaced apart from the first conductive portion L1, which may mean that the first common layer 420 in the first light emitting layer 400 extends from the display area AA to the non-display area NA and is spaced apart from the first conductive portion L1. The first light emitting structure 410 in the first light emitting layer 400 may be located only in the display area AA.

[0079] Optionally, part of the common layer 500 may be located in the gap between the first conductive portion L1 and the first light-emitting layer 400 and connected to the sidewall of the first conductive portion L1 to better increase the connection area between the common layer 500 and the first conductive portion L1 .

[0080] Optionally, the common layer 500 may extend to the side of the first conductive portion L1 away from the substrate 100, and the common layer 500 may be connected to the top wall of the first conductive portion L1 away from the substrate 100, so that a larger connection area may be provided between the common layer 500 and the first conductive portion L1.

[0081] Optionally, the common layer 500 may also extend to the side of the first conductive portion L1 away from the display area AA, and the common layer 500 may be connected to the side wall of the first conductive portion L1 away from the display area AA, so that a larger connection area may be provided between the common layer 500 and the first conductive portion L1.

[0082] In some optional embodiments, the second light emitting layer 600 may extend from the display area AA to the non-display area NA, and a portion of the second light emitting layer 600 may be located on a side of the first conductive portion L1 facing away from the substrate 100 .

[0083] Optionally, part of the second light-emitting layer 600 may be located on the side of the first conductive portion L1 facing away from the substrate 100 , which may mean that part of the second light-emitting layer 600 may be located on the side of the common layer connected to the first conductive portion L1 facing away from the substrate 100 .

[0084] Optionally, part of the second light emitting layer 600 may be located between the first conductive portion L1 and the first electrode layer 700. For example, part of the second light emitting layer 600 may be located between the common layer on the side of the first conductive portion L1 away from the substrate 100 and the first electrode layer 700.

[0085] Optionally, part of the second light emitting layer 600 may be located between the first conductive portion L1 and the first electrode layer 700. For example, part of the second light emitting layer 600 may be located between the common layer on the side of the first conductive portion L1 away from the substrate 100 and the first electrode layer 700.

[0086] In these optional embodiments, a portion of the second light-emitting layer 600 is arranged on the side of the first conductive portion L1 facing away from the substrate 100, so that the common layer 500 above the first conductive portion L1 is not easily in direct contact with the first electrode layer 700 under the restriction of the second light-emitting layer 600, thereby reducing the risk of short-circuiting the first electrode layer 700 and the common layer 500, thereby facilitating independent control of the first electrode layer 700 and the common layer 500.

[0087] In some optional embodiments, the orthographic projection of the common layer 500 on the substrate 100 may be located within the orthographic projection of the second light-emitting layer 600 on the substrate 100, so that the second light-emitting layer 600 can better cover the common layer 500, so that the common layer 500 is not easily in direct contact with the first electrode layer 700 under the restriction of the second light-emitting layer 600, thereby reducing the risk of short-circuiting the first electrode layer 700 and the common layer 500, and facilitating independent control of the first electrode layer 700 and the common layer 500.

[0088] Optionally, the orthographic projection of the common layer 500 on the substrate 100 may be located within the orthographic projection of the second light-emitting layer 600 on the substrate 100 , which may mean that the orthographic projection of the common layer 500 on the substrate 100 may be located within the orthographic projection of the second common layer 620 in the second light-emitting layer 600 on the substrate 100 .

[0089] In some optional embodiments, part of the second light-emitting layer 600 may be located between the first conductive portion L1 and the second conductive portion L2. For example, the second light-emitting layer 600 may extend from the display area AA to the non-display area NA and be located between the first conductive portion L1 and the second conductive portion L2, so that the second light-emitting layer 600 can also better cover the first conductive portion L1, so that the second light-emitting layer 600 can better limit the short-circuit connection between the first conductive portion L1 and the second conductive portion L2, thereby facilitating independent control of the first electrode layer 700 and independent control of the common layer 500.

[0090] Optionally, part of the second light-emitting layer 600 may be located between the common layer 500 and the second conductive portion L2, so that the second light-emitting layer 600 can better limit the short circuit connection between the common layer 500 and the second conductive portion L2, thereby facilitating independent control of the first electrode layer 700 and independent control of the common layer 500.

[0091] Figure 3 It is a structural schematic diagram of a pixel definition layer 300, a light emitting unit EU and a first conductive portion L1 provided in an embodiment of the present application.

[0092] like Figure 1 and Figure 3 As shown, in some embodiments, the non-display area NA may be arranged around the display area AA, for example, part of the non-display area NA may be located on both sides of the display area AA in the first direction X, and part of the non-display area NA may be located on both sides of the display area AA in the second direction Y.

[0093] Optionally, the first conductive portion L1 is located in the non-display area NA, which may mean that the first conductive portion L1 may be located in the non-display area NA on at least one side of the display area AA in the first direction X, and / or the first conductive portion L1 may be located in the non-display area NA on at least one side of the display area AA in the second direction Y.

[0094] Optionally, the plurality of light emitting units EU may be arrayed in the first direction X and the second direction Y. For example, some light emitting units EU may be arranged in parallel and spaced in the first direction X, and a plurality of rows of light emitting units EU may be arranged spaced in the second direction Y, so that some light emitting units EU may be arranged in the same column and spaced in the second direction Y.

[0095] Figure 4is a structural diagram of a common layer 500, a light-emitting unit EU and a first conductive portion L1 provided in an embodiment of the present application. Figure 5 is a structural diagram of a common layer 500, a light emitting unit EU and a first conductive portion L1 provided in another embodiment of the present application. Figure 6 It is a structural diagram of a common layer 500, a light emitting unit EU and a first conductive portion L1 provided in yet another embodiment of the present application.

[0096] like Figures 4 to 6 As shown, in some optional embodiments, the orthographic projections of the plurality of light-emitting units EU on the substrate 100 may be located within the orthographic projection of the single common layer 500 on the substrate 100, so that the single common layer 500 may be simultaneously used to participate in controlling the light emission of the first light-emitting structure 410 and the second light-emitting structure 610 in the plurality of light-emitting units EU, so as to facilitate the first conductive portion L1 to control the potential of the common layer 500.

[0097] like Figure 4 As shown, in some embodiments, the common layer 500 may be planar, and the orthographic projections of all the light-emitting units EU in the display panel 10 on the substrate 100 may be located within the orthographic projection of a single planar common layer 500 on the substrate 100, so that only by controlling the potential of the single planar common layer 500, the series relationship between the first light-emitting layer 400 and the second light-emitting layer 600 at each position can be better controlled, thereby facilitating the control of the light emission of the second light-emitting structure 610 in each light-emitting unit EU, thereby reducing the control difficulty of the display panel 10.

[0098] Optionally, the common layer 500 is in a planar shape, which may mean that the common layer 500 is relatively continuous and has a relatively large size in both the first direction X and the second direction Y.

[0099] like Figure 5 and Figure 6 As shown, in other embodiments, the common layer 500 includes a plurality of common sub-portions 510 disposed at intervals, a single common sub-portion 510 is located between the first light-emitting structure 410 and the second light-emitting structure 610 of at least one light-emitting unit EU, the first conductive portion L1 includes a plurality of conductive sub-portions L11 disposed at intervals, and a single common sub-portion 510 is connected to a single conductive sub-portion L11.

[0100] By setting a plurality of common sub-sections 510 arranged at intervals, and setting a plurality of conductive sub-sections L11 respectively connected to each common sub-section 510, each conductive sub-section L11 can be used to respectively control the potential of each common sub-section 510, so that the light-emitting display of the second light-emitting structure 610 in each partial light-emitting unit EU can be controlled relatively independently through the conductive sub-section L11, that is, the light-emitting display of the second light-emitting structure 610 in one part of the light-emitting unit EU can be independent of the light-emitting of the second light-emitting structure 610 in another part of the light-emitting unit EU, so that the potential of the common sub-section 510 connected thereto can be controlled according to the light-emitting requirements of different light-emitting units EU (for example, according to the grayscale requirements of different light-emitting units EU), thereby achieving more precise control of the second light-emitting structure 610 of each partial light-emitting unit EU, reducing the display color deviation of the display panel 10, and improving the display effect of the display panel 10.

[0101] Optionally, the common sub-portion 510 may be in a strip shape, and a single common sub-portion 510 may be located between the first light-emitting structure 410 and the second light-emitting structure 610 of at least two light-emitting units EU, that is, a single common sub-portion 510 may be used to participate in controlling the light emission of the second light-emitting structure 610 in at least two light-emitting units EU at the same time, which can facilitate the arrangement of the common sub-portion 510 and improve the control efficiency of the common sub-portion 510 over the light emission of the second light-emitting structure 610 in the light-emitting unit EU.

[0102] like Figure 5 As shown, optionally, at least part of the common sub-portion 510 can be extended and formed along the first direction X and arranged at intervals in the second direction Y, a single common sub-portion 510 is located between the first light-emitting structure 410 and the second light-emitting structure 610 of at least two light-emitting units EU adjacent to each other in the first direction X, and the conductive sub-portion L11 is located in the non-display area NA on at least one side of the display area AA in the first direction X.

[0103] Exemplarily, the orthographic projections of the light-emitting units EU located in the same row on the substrate 100 may be located within the orthographic projection of a single common sub-portion 510 on the substrate 100, and / or, the orthographic projections of the light-emitting units EU located in at least two adjacent rows on the substrate 100 may be located within the orthographic projection of a single common sub-portion 510 on the substrate 100.

[0104] In this optional embodiment, the common sub-portion 510 formed by extending along the first direction X can be used to participate in controlling the light emission of the second light emitting structure 610 in the plurality of light emitting units EU in the same row, or the common sub-portion 510 formed by extending along the first direction X can be used to participate in controlling the light emission of the second light emitting structure 610 in the plurality of light emitting units EU in at least two adjacent rows, so that the second light emitting structure 610 of each part of the light emitting unit EU can be controlled more accurately. In addition, the common sub-portion 510 can be extended along the first direction X to the first conductive portion L1 in the non-display area NA, so as to facilitate the arrangement of the common sub-portion 510.

[0105] like Figure 6 As shown, optionally, at least part of the common sub-portion 510 is extended and formed along the second direction Y and is arranged at intervals in the first direction X, a single common sub-portion 510 is located between the first light-emitting structure 410 and the second light-emitting structure 610 of at least two adjacent light-emitting units EU in the first direction X, and the conductive sub-portion L11 is located in the non-display area NA on at least one side of the display area AA in the second direction Y.

[0106] Exemplarily, the orthographic projections of the light-emitting units EU located in the same column on the substrate 100 may be located within the orthographic projection of a single common sub-portion 510 on the substrate 100, and / or, the orthographic projections of the light-emitting units EU located in at least two adjacent columns on the substrate 100 may be located within the orthographic projection of a single common sub-portion 510 on the substrate 100.

[0107] In this optional embodiment, the common sub-portion 510 formed by extending along the second direction Y can be used to participate in controlling the light emission of the second light emitting structure 610 in the plurality of light emitting units EU in the same column, or the common sub-portion 510 formed by extending along the second direction Y can be used to participate in controlling the light emission of the second light emitting structure 610 in the plurality of light emitting units EU in at least two adjacent columns, so that the second light emitting structure 610 of each part of the light emitting unit EU can be controlled more accurately. In addition, the common sub-portion 510 can be extended along the second direction Y to the first conductive portion L1 in the non-display area NA, so as to facilitate the arrangement of the common sub-portion 510.

[0108] Figure 7 It is a partial cross-sectional view of a display panel 10 provided in another embodiment of the present application.

[0109] like Figure 7 As shown, in some optional embodiments, the display panel 10 also includes a protective structure P covering the edge of the first conductive part L1. The protective structure P can be used to protect the edge of the first conductive part L1, that is, the protective structure P can be used to protect the side wall of the first conductive part L1, so that the first conductive part L1 is not easily damaged by etching during the preparation process of the display panel 10.

[0110] Exemplarily, the protection structure P may cover the edge of the first conductive portion L1 and a portion of the surface of the first conductive portion L1 facing away from the substrate 100 , so as to enhance the protection effect of the protection structure P on the first conductive portion L1 .

[0111] Optionally, a portion of the surface of the first conductive portion L1 facing away from the substrate 100 may not be covered by the protection structure P to facilitate the connection between the common layer 500 and the first conductive portion L1 .

[0112] Optionally, similarly, part of the protection structure P can also cover the edge of the second conductive part L2, so that the protection structure P can also be used to protect the edge of the second conductive part L2, that is, the protection structure P can also be used to protect the side wall of the second conductive part L2, so that the second conductive part L2 is not easily damaged by etching during the preparation process of the display panel 10.

[0113] In some embodiments of the present application, there are various arrangements of the positions of the first conductive portion L1 , the second conductive portion L2 , and the protection structure P.

[0114] In some embodiments, the first conductive portion L1, the second conductive portion L2 and the protective structure P can be arranged on the same side of the substrate 100 with the first light-emitting layer 400 to facilitate the connection between the common layer 500 and the first conductive portion L1, and to facilitate the connection between the first electrode layer 700 and the second conductive portion L2.

[0115] Optionally, the first conductive portion L1 can be set in the same layer and the same material as the second electrode 210, so that the first conductive portion L1 and the second electrode 210 can be prepared using the same or similar preparation equipment, and the first conductive portion L1 and the second electrode 210 can be prepared in the same preparation step, thereby greatly improving the preparation efficiency of the display panel 10.

[0116] Optionally, the second conductive portion L2 may also be provided in the same layer and with the same material as the second electrode 210, so that the second conductive portion L2 and the second electrode 210 may be prepared using the same or similar preparation equipment, and the second conductive portion L2 and the second electrode 210 may be prepared in the same preparation step. For example, the first conductive portion L1, the second conductive portion L2 and the second electrode 210 may all be prepared in the same preparation step, thereby greatly improving the preparation efficiency of the display panel 10.

[0117] Optionally, the protection structure P can be set in the same layer and with the same material as the pixel defining portion 310, so that the protection structure P and the pixel defining portion 310 can be prepared using the same or similar preparation equipment, and the protection structure P and the pixel defining portion 310 can be prepared in the same preparation step, thereby greatly improving the preparation efficiency of the display panel 10.

[0118] Figures 8 to 11It is a schematic diagram of a preparation process of a method for preparing a display panel 10 provided in an embodiment of the present application.

[0119] For example, during the preparation of the display panel 10, Figure 8 As shown, the substrate 100 may be prepared first, such as Fig. 9 As shown, the material of the second electrode layer 200 is then prepared on the entire surface of the substrate 100, and the material of the second electrode layer 200 is patterned to form the second electrode layer 200, the first conductive portion L1 and the second conductive portion L2. Fig.10 As shown, the material of the pixel definition layer 300 is then prepared on the entire surface, and the material of the pixel definition layer 300 is patterned to form the pixel defining portion 310 and the protection structure P. Fig.11 As shown, the first light-emitting layer 400 , the common layer 500 , the second light-emitting layer 600 and the second electrode layer 200 are then prepared in sequence.

[0120] Fig.12 is a partial cross-sectional view of a display panel 10 provided in yet another embodiment of the present application. Fig.13 It is a schematic diagram of a partial structure of a first conductive portion L1 provided in an embodiment of the present application.

[0121] like Fig.12 and Fig.13 As shown, in some optional embodiments, a through hole L1a may be opened on the first conductive portion L1. During the preparation of the display panel 10, the through hole L1a can facilitate the discharge of gas in the film layer below the first conductive portion L1.

[0122] For example, during the process of preparing the first light-emitting layer 400 , the second light-emitting layer 600 and the common layer 500 , the through hole L1 a on the first conductive portion L1 can facilitate the discharge of gas in a portion of the organic film layer in the substrate 100 .

[0123] Optionally, the number of through holes L1a formed on the first conductive portion L1 may be multiple, and the multiple through holes L1a may be arranged at intervals. Exemplarily, the multiple through holes L1a may be arranged at intervals in the first direction X, and / or the multiple through holes L1a may be arranged at intervals in the second direction Y.

[0124] Optionally, there are many ways to set the shape of the through hole L1a. For example, the through hole L1a can be a square hole, a bar hole, a round hole or a waist hole, etc., which is not specifically limited in the present application.

[0125] Optionally, the protection structure P may also cover the inner wall of the through hole L1a. For example, the protection structure P may be located in the through hole L1a and cover the inner wall of the through hole L1a, so that the inner wall of the through hole L1a is not easily etched and damaged during the preparation of the display panel 10.

[0126] According to some embodiments of the present application, the present application further provides a display device, which includes the display panel 10 in any of the aforementioned embodiments.

[0127] Since the display device provided in the embodiment of the present application includes the display panel 10 in any of the aforementioned embodiments, the display device provided in the embodiment of the present application has the beneficial effects of the display panel 10 in any of the aforementioned embodiments, which will not be described in detail here.

[0128] The display device provided in the embodiment of the present application may include but is not limited to a vehicle-mounted display screen, a mobile phone, a television, a tablet computer, a smart watch, and other devices with display functions. Exemplarily, when the display device includes a vehicle-mounted display screen, when the first conductive portion L1 participates in controlling the potential of the common layer 500 so that the first light-emitting layer 400 and the second light-emitting layer 600 are connected in series through the common layer 500, that is, the first light-emitting layer 400 and the second light-emitting layer 600 can emit light and display at the same time, the service life of the display panel 10 can be improved, and the application requirements of the vehicle-mounted display screen can be better met.

[0129] In some optional embodiments, the display device may further include a control module, and the first conductive part L1 is connected to the control module. The control module can control the potential of the common layer 500 through the first conductive part L1, that is, the control module can control the potential of the common layer 500 by controlling the potential of the first conductive part L1, so as to achieve control of the series relationship between the first light-emitting layer 400 and the second light-emitting layer 600.

[0130] In the display device provided in some embodiments of the present application, there are multiple control methods for the control module to control the potential of the common layer 500. Specifically, there are multiple ways to identify the specific situation and the non-specific situation in the aforementioned embodiments, and the control module can control the potential of the common layer 500 according to the identification of the specific situation and the non-specific situation in the aforementioned embodiments.

[0131] In some embodiments of the present application, the control module can determine whether the display panel 10 is in a specific situation based on the number of light-emitting units EU in a lower grayscale in the display panel 10, and control the potential of the common layer 500 accordingly to control the series relationship between the first light-emitting layer 400 and the second light-emitting layer 600.

[0132] In some optional embodiments, the control module may be configured as follows: when the brightness of the light-emitting units EU greater than or equal to a first preset number among the multiple light-emitting units EU electrically connected through a single target common layer 500 is less than the first preset brightness, the control module controls the potential of the first conductive part L1 connected to the target common layer 500 to be less than or equal to the potential of the first electrode layer 700.

[0133] Optionally, when the common layer 500 is planar, and the orthographic projections of all the light-emitting units EU in the display panel 10 on the substrate 100 can be located within the orthographic projection of a single planar common layer 500 on the substrate 100, the target common layer 500 can be the entire common layer 500. When the common layer 500 includes a plurality of common sub-portions 510 disposed at intervals, the target common layer 500 can be any one of the common sub-portions 510.

[0134] Optionally, the first preset number may be set according to the number of light-emitting units EU electrically connected through a single target common layer 500. The number of light-emitting units EU electrically connected through a single target common layer 500 may refer to the number of light-emitting units EU having the same target common layer 500 sandwiched between the first light-emitting structure 410 and the second light-emitting structure 610, that is, the number of light-emitting units EU that can be controlled by a single target common layer 500.

[0135] For example, when the common layer 500 is in a planar shape, and the orthographic projections of all the light-emitting units EU in the display panel 10 on the substrate 100 can be located within the orthographic projection of a single planar common layer 500 on the substrate 100, the number of light-emitting units EU electrically connected through a single target common layer 500 can be the total number of light-emitting units EU in the display panel 10.

[0136] For example, when the common layer 500 includes a plurality of common sub-portions 510 disposed at intervals, the number of light-emitting units EU electrically connected through a single target common layer 500 may be the number of light-emitting units EU electrically connected through a single common sub-portion 510. Specifically, when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of light-emitting units EU located in the same row, the number of light-emitting units EU electrically connected through a single common layer 500 may be the number of light-emitting units EU located in the same row electrically connected through a single common sub-portion 510, and when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of light-emitting units EU located in at least two adjacent rows, the number of light-emitting units EU electrically connected through a single common layer 500 may be the number of a plurality of light-emitting units EU located in at least two adjacent rows electrically connected through a single common sub-portion 510.

[0137] Exemplarily, the number of light-emitting units EU electrically connected through a single target common layer 500 is a, and the value range of the first preset number may be 0.7a to 0.9a. For example, the value of the first preset number may be 0.7a, 0.75a, 0.8a, 0.85a, 0.9a, etc.

[0138] Optionally, the first preset brightness may be the luminous brightness of the sub-pixel corresponding to the light-emitting unit EU when it is in a lower grayscale. For example, when the luminous brightness of the sub-pixel corresponding to the light-emitting unit EU can be divided into 256 grayscales, the first preset brightness may be the luminous brightness of the sub-pixel corresponding to the light-emitting unit EU when it is in grayscale 32 and below.

[0139] Optionally, the control module controls the potential of the first conductive portion L1 connected to the target common layer 500 to be less than or equal to the potential of the first electrode layer 700, so that the potential of the target common layer 500 can be less than or equal to the potential of the first electrode layer 700. Exemplarily, the control module can provide a negative power supply voltage signal to the target common layer 500 through the first conductive portion L1, so that the potential of the target common layer 500 can be equal to the potential of the first electrode layer 700.

[0140] In these optional embodiments, when the brightness of the light-emitting units EU greater than or equal to the first preset number among the multiple light-emitting units EU electrically connected through the single target common layer 500 is less than the first preset brightness, it can be determined that the display panel 10 is in a specific situation at this time. In this case, a control module is set to control the potential of the first conductive part L1 connected to the target common layer 500 to be less than or equal to the potential of the first electrode layer 700, so that the current in the second electrode 210 on one side of the target common layer 500 can light up the first light-emitting structure 410 in the light-emitting unit EU connected to the target common layer 500, but at this time the current cannot pass through the target common layer 500 to light up the second light-emitting structure 610 in the light-emitting unit EU connected to the target common layer 500, so that the second light-emitting structure 610 in the light-emitting unit EU connected to the target common layer 500 cannot emit light, so that during the light-emitting display process of the display panel 10, the second light-emitting layer 600 is not easily lit due to lateral leakage of the target common layer 500, so that the corresponding sub-pixels in the low grayscale in the light-emitting unit EU connected to the target common layer 500 and the sub-pixels on its surrounding sides that do not need to emit light can have a larger brightness difference, thereby effectively reducing the color deviation of the display panel 10 and improving the display effect of the display panel 10.

[0141] In some optional embodiments, the control module may be configured as follows: when, among the multiple light-emitting units EU electrically connected through a single target common layer 500, the brightness of the light-emitting units EU having less than a first preset number is less than the first preset brightness; and / or, when, among the multiple light-emitting units EU electrically connected through a single target common layer 500, the brightness of the light-emitting units EU having more than or equal to a second preset number is greater than the first preset brightness, the control module controls the potential of the first conductive portion L1 connected to the target common layer 500 to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200, or the control module stops providing a signal to the first conductive portion L1 connected to the target common layer 500.

[0142] Optionally, the control module controls the potential of the first conductive portion L1 connected to the target common layer 500 to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200 , so that the potential of the target common layer 500 can be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200 .

[0143] Optionally, the control module stops providing signals to the first conductive part L1 connected to the target common layer 500 , so that the target common layer 500 can only serve as a conductor, and the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the target common layer 500 can be connected in series through the common layer 500 .

[0144] Optionally, the second preset number can be set according to the number of light emitting units EU electrically connected through a single target common layer 500. Exemplarily, the second preset number can be equal to the difference between a and the first preset number, that is, the sum of the first preset number and the second preset number can be equal to a.

[0145] In these optional embodiments, when, among the multiple light-emitting units EU electrically connected through a single target common layer 500, the brightness of the light-emitting units EU having less than a first preset number is less than the first preset brightness; and / or, when, among the multiple light-emitting units EU electrically connected through a single target common layer 500, the brightness of the light-emitting units EU having more than or equal to a second preset number is greater than the first preset brightness, it can be determined that the display panel 10 is in a non-specific situation at this time.

[0146] In this case, the potential of the first conductive part L1 connected to the target common layer 500 is controlled by setting the control module to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200, or the control module is set to stop providing a signal to the first conductive part L1 connected to the target common layer 500, so that the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the target common layer 500 can be connected in series through the common layer 500, so as to improve the light-emitting efficiency and service life of the display panel 10. In addition, since the corresponding sub-pixels at high grayscale in the light-emitting unit EU connected to the target common layer 500 and the sub-pixels on its surrounding side that do not need to emit light can have a large brightness difference, the color deviation of the display panel 10 can be well reduced, and the display effect of the display panel 10 can be improved.

[0147] In some embodiments of the present application, the control module can also determine whether the display panel 10 is in a specific state according to the light emission conditions of each light-emitting unit EU with different light-emitting colors, and control the potential of the common layer 500 accordingly to control the series relationship between the first light-emitting layer 400 and the second light-emitting layer 600.

[0148] Fig.14It is a partial structural diagram of a light-emitting unit EU provided in an embodiment of the present application.

[0149] like Fig.14 As shown, in some optional embodiments, the light emitting unit EU may include a first type unit EU1 and a second type unit EU2 with different light emitting colors, so as to realize color display of the display panel 10 .

[0150] Optionally, the luminous color of the first type unit EU1 may be green or blue, and the luminous color of the second type unit EU2 may be red.

[0151] In some optional embodiments, the control module may be configured as follows: when, among a plurality of first-type units EU1 electrically connected through a single target common layer 500, the brightness of a first-type unit EU1 having a number greater than or equal to a first preset color number is less than a second preset brightness; and / or, when, among a plurality of second-type units EU2 electrically connected through a single target common layer 500, the brightness of a second-type unit EU2 having a number greater than or equal to a third preset color number is less than a third preset brightness, the control module controls the potential of the first conductive portion L1 connected to the target common layer 500 to be less than or equal to the potential of the first electrode layer 700.

[0152] Optionally, the first preset color quantity may be set according to the quantity of the first type units EU1 electrically connected through a single target common layer 500. The quantity of the first type units EU1 electrically connected through a single target common layer 500 may refer to the quantity of the first type units EU1 having the same target common layer 500 sandwiched between the first light emitting structure 410 and the second light emitting structure 610, that is, the quantity of the first type units EU1 that can be controlled by a single target common layer 500.

[0153] For example, when the common layer 500 is in a planar shape, and the orthographic projections of all the first-type units EU1 in the display panel 10 on the substrate 100 can be located within the orthographic projection of a single planar common layer 500 on the substrate 100, the number of first-type units EU1 electrically connected through a single target common layer 500 can be the total number of first-type units EU1 in the display panel 10.

[0154] For example, when the common layer 500 includes a plurality of common sub-portions 510 disposed at intervals, the number of first-type units EU1 electrically connected through a single target common layer 500 may be the number of first-type units EU1 electrically connected through a single common sub-portion 510. Specifically, when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of first-type units EU1 located in the same row, the number of first-type units EU1 electrically connected through a single common layer 500 may be the number of first-type units EU1 located in the same row electrically connected through a single common sub-portion 510, and when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of first-type units EU1 located in at least two adjacent rows, the number of first-type units EU1 electrically connected through a single common layer 500 may be the number of first-type units EU1 located in at least two adjacent rows electrically connected through a single common sub-portion 510.

[0155] Exemplarily, the number of first-type units EU1 electrically connected through a single target common layer 500 is b, and the value range of the first preset color number is 0.25b to 0.35b. For example, the value of the first preset number can be 0.25b, 0.3b, 0.35b, etc.

[0156] Optionally, the third preset color quantity may be set according to the number of the second type units EU2 electrically connected through a single target common layer 500. The number of the second type units EU2 electrically connected through a single target common layer 500 may refer to the number of the second type units EU2 having the same target common layer 500 sandwiched between the first light emitting structure 410 and the second light emitting structure 610, that is, the number of the second type units EU2 that can be controlled by a single target common layer 500.

[0157] For example, when the common layer 500 is in a planar shape, and the orthographic projections of all the second-type units EU2 in the display panel 10 on the substrate 100 can be located within the orthographic projection of a single planar common layer 500 on the substrate 100, the number of second-type units EU2 electrically connected through a single target common layer 500 can be the total number of second-type units EU2 in the display panel 10.

[0158] For example, when the common layer 500 includes a plurality of common sub-portions 510 disposed at intervals, the number of the second type units EU2 electrically connected through a single target common layer 500 may be the number of the second type units EU2 electrically connected through a single common sub-portion 510. Specifically, when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of second type units EU2 located in the same row, the number of the second type units EU2 electrically connected through a single common layer 500 may be the number of the second type units EU2 located in the same row electrically connected through a single common sub-portion 510, and when the common sub-portion 510 is used to participate in controlling the light emission of the second light-emitting structure 610 in a plurality of second type units EU2 located in at least two adjacent rows, the number of the second type units EU2 electrically connected through a single common layer 500 may be the number of the plurality of second type units EU2 located in at least two adjacent rows electrically connected through a single common sub-portion 510.

[0159] Exemplarily, the number of the second type units EU2 electrically connected through a single target common layer 500 is c, and the value range of the third preset color number may be 0.45c to 0.55c. For example, the value of the third preset number may be 0.45c, 0.5c, 0.55c, etc.

[0160] Optionally, the second preset brightness may be the luminous brightness of the sub-pixel corresponding to the first type unit EU1 when it is in a lower grayscale. For example, when the luminous brightness of the sub-pixel corresponding to the first type unit EU1 can be divided into 256 grayscales, the second preset brightness may be the luminous brightness of the sub-pixel corresponding to the first type unit EU1 when it is in grayscale 32 and below.

[0161] Optionally, the third preset brightness may be the luminous brightness of the sub-pixel corresponding to the second type unit EU2 when it is in a lower grayscale. For example, when the luminous brightness of the sub-pixel corresponding to the second type unit EU2 can be divided into 256 grayscales, the third preset brightness may be the luminous brightness of the sub-pixel corresponding to the second type unit EU2 when it is in grayscale 32 and below.

[0162] In these optional embodiments, when the brightness of the first type unit EU1 having more than or equal to the first preset color number among the multiple first type units EU1 electrically connected through the single target common layer 500 is less than the second preset brightness; and / or when the brightness of the second type unit EU2 having more than or equal to the third preset color number among the multiple second type units EU2 electrically connected through the single target common layer 500 is less than the third preset brightness, it can be determined that the display panel 10 is in a specific situation at this time.

[0163] In this case, the control module is set to control the potential of the first conductive portion L1 connected to the target common layer 500 to be less than or equal to the potential of the first electrode layer 700, so that the current in the second electrode 210 on one side of the target common layer 500 can light up the first light-emitting structure 410 in the first type unit EU1 connected to the target common layer 500, but at this time the current cannot pass through the target common layer 500 to light up the second light-emitting structure 610 in the first type unit EU1 and the second type unit EU2 connected to the target common layer 500, so that the target common layer 500 is connected to the target common layer 500. The second light-emitting structure 610 in the first type unit EU1 and the second type unit EU2 connected to the target common layer 500 cannot emit light, so that during the light-emitting display process of the display panel 10, the second light-emitting layer 600 is not easily lit due to the lateral leakage of the target common layer 500, so that the corresponding sub-pixels in the low grayscale in the first type unit EU1 and the second type unit EU2 connected to the target common layer 500 and the sub-pixels on their surrounding sides that do not need to emit light can have a large brightness difference, thereby effectively reducing the color deviation of the display panel 10 and improving the display effect of the display panel 10.

[0164] In some optional embodiments, the control module may be configured as follows: when, among the plurality of first-category units EU1 electrically connected through a single target common layer 500, the brightness of the first-category unit EU1 having a number of colors less than the first preset number is less than the second preset brightness; and / or, when, among the plurality of first-category units EU1 electrically connected through a single target common layer 500, the brightness of the first-category unit EU1 having a number of colors greater than or equal to the second preset number is greater than the second preset brightness; and / or, when, among the plurality of second-category units EU2 electrically connected through a single target common layer 500, the brightness of the first-category unit EU1 having a number of colors greater than or equal to the second preset number is greater than the second preset brightness. When the brightness of the second type unit EU2 with less than the third preset color number is less than the third preset brightness; and / or, when the brightness of the second type unit EU2 with more than or equal to the fourth preset color number among the multiple second type units EU2 electrically connected through a single target common layer 500 is greater than the third preset brightness, the control module controls the potential of the first conductive part L1 connected to the target common layer 500 to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200, or the control module stops providing a signal to the first conductive part L1 connected to the target common layer 500.

[0165] Optionally, the second preset color quantity can be set according to the number of first type units EU1 electrically connected through a single target common layer 500. Exemplarily, the second preset color quantity is equal to the difference between b and the first preset color quantity, that is, the sum of the first preset color quantity and the second preset color quantity can be equal to b.

[0166] Optionally, the fourth preset color quantity can be set according to the number of second type units EU2 electrically connected through a single target common layer 500. Exemplarily, the fourth preset color quantity is equal to the difference between c and the third preset color quantity, that is, the sum of the third preset color quantity and the fourth preset color quantity can be equal to c.

[0167] In these optional embodiments, when, among a plurality of first-class units EU1 electrically connected through a single target common layer 500, the brightness of a first-class unit EU1 having a number less than a first preset color is less than a second preset brightness; and / or, when, among a plurality of first-class units EU1 electrically connected through a single target common layer 500, the brightness of a first-class unit EU1 having a number greater than or equal to the second preset color is greater than the second preset brightness; and / or, when, among a plurality of second-class units EU2 electrically connected through a single target common layer 500, the brightness of a second-class unit EU2 having a number less than a third preset color is less than a third preset brightness; and / or, when, among a plurality of second-class units EU2 electrically connected through a single target common layer 500, the brightness of a second-class unit EU2 having a number greater than or equal to a fourth preset color is greater than the third preset brightness, it can be determined that the display panel 10 is in a non-specific situation at this time.

[0168] In this case, the potential of the first conductive part L1 connected to the target common layer 500 is controlled to be between the potential of the first electrode layer 700 and the potential of the second electrode layer 200 by setting the control module, or the control module is set to stop providing a signal to the first conductive part L1 connected to the target common layer 500, so that the first light-emitting layer 400 and the second light-emitting layer 600 on both sides of the target common layer 500 can be connected in series through the common layer 500, so as to improve the light-emitting efficiency and service life of the display panel 10. In addition, since the corresponding sub-pixels at high grayscale in the first type unit EU1 and the second type unit EU2 connected to the target common layer 500 can have a large brightness difference with the sub-pixels on their surroundings that do not need to emit light, the color deviation of the display panel 10 can be reduced well, and the display effect of the display panel 10 can be improved.

[0169] The above is only a specific implementation of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A display panel, characterized in that: The display panel has a display area and a non-display area located around the display area, and the display panel includes: substrate; A first light-emitting layer is disposed on one side of the substrate and is at least partially located in the display area; A common layer is disposed on a side of the first light-emitting layer away from the substrate; A second light-emitting layer is disposed on a side of the common layer away from the substrate; The first conductive portion is located in the non-display area. The common layer extends from the display area to the non-display area and is connected to the first conductive portion. The first conductive portion is used to participate in controlling the potential of the common layer.

2. The display panel according to claim 1, characterized in that: The first light emitting layer extends from the display area to the non-display area and is spaced apart from the first conductive portion.

3. The display panel according to claim 1, characterized in that: The second light emitting layer extends from the display area to the non-display area, and a portion of the second light emitting layer is located on a side of the first conductive portion facing away from the substrate.

4. The display panel according to claim 1, characterized in that: The orthographic projection of the common layer on the substrate is located within the orthographic projection of the second light-emitting layer on the substrate.

5. The display panel according to claim 1, characterized in that: The display panel further includes a first electrode layer disposed on a side of the second light emitting layer away from the substrate, and a portion of the second light emitting layer is located between the first conductive portion and the first electrode layer.

6. The display panel according to claim 5, characterized in that: The display panel further includes a second conductive portion located in the non-display area and spaced apart from the first conductive portion, the first electrode layer is connected to the second conductive portion, and a portion of the second light-emitting layer is located between the first conductive portion and the second conductive portion.

7. The display panel according to claim 1, characterized in that: The first light-emitting layer includes a plurality of first light-emitting structures arranged at intervals, the second light-emitting layer includes a second light-emitting structure located on a side of the first light-emitting structure away from the substrate, and the light-emitting unit includes a single first light-emitting structure and a single second light-emitting structure whose orthographic projections overlap on the substrate. The common layer includes a plurality of common sub-portions arranged at intervals, a single common sub-portion is located between the first light-emitting structure and the second light-emitting structure of at least one of the light-emitting units, and the first conductive portion includes a plurality of conductive sub-portions arranged at intervals, and a single common sub-portion is connected to a single conductive sub-portion.

8. The display panel according to claim 7, characterized in that: The plurality of light emitting units are arrayed in a first direction and a second direction, and the first direction, the second direction and the thickness direction of the display panel intersect each other. Wherein, at least part of the common sub-portions are extended and formed along the first direction and are arranged at intervals in the second direction, a single common sub-portion is located between the first light-emitting structure and the second light-emitting structure of at least two adjacent light-emitting units in the first direction, and the conductive sub-portion is located in the non-display area on at least one side of the display area in the first direction; Or, at least part of the common sub-portion is extended and formed along the second direction and is arranged at intervals in the first direction, a single common sub-portion is located between the first light-emitting structure and the second light-emitting structure of at least two adjacent light-emitting units in the first direction, and the conductive sub-portion is located in the non-display area on at least one side of the display area in the second direction.

9. The display panel according to claim 1, characterized in that: The display panel further includes a protection structure covering an edge of the first conductive portion.

10. The display panel according to claim 9, characterized in that: The display panel further includes a pixel definition layer and a second electrode layer disposed on one side of the substrate, wherein the pixel definition layer includes a pixel definition portion and a plurality of pixel openings located in the display area and surrounded by the pixel definition portion, and the second electrode layer includes a plurality of second electrodes disposed at intervals, wherein a portion of the second electrode is exposed from the pixel opening and connected to the first light-emitting layer. The first conductive portion and the second electrode are provided in the same layer and with the same material, and / or the protection structure and the pixel defining portion are provided in the same layer and with the same material.

11. The display panel according to any one of claims 1 to 10, characterized in that: The first conductive portion is provided with a through hole.

12. The display panel according to claim 11, characterized in that: The display panel also includes a protection structure covering the inner wall of the through hole.

13. A display device, characterized in that: Comprising the display panel as claimed in any one of claims 1 to 12.

14. The display device according to claim 13, characterized in that: The display panel further comprises a first electrode layer disposed on a side of the second light-emitting layer away from the substrate and a second electrode layer disposed on a side of the first light-emitting layer facing the substrate, the first light-emitting layer comprises a plurality of first light-emitting structures disposed at intervals, the second light-emitting layer comprises a second light-emitting structure located on a side of the first light-emitting structure away from the substrate, the light-emitting unit comprises a single first light-emitting structure and a single second light-emitting structure whose orthographic projections overlap on the substrate, and the common layer is located between the first light-emitting structure and the second light-emitting structure of at least two of the light-emitting units, The display device also includes a control module, and the first conductive part is connected to the control module, and the control module is configured to: when the brightness of the light-emitting units greater than or equal to a first preset number among the plurality of light-emitting units electrically connected through a single target common layer is less than a first preset brightness, the control module controls the potential of the first conductive part connected to the target common layer to be less than or equal to the potential of the first electrode layer.

15. The display device according to claim 14, characterized in that: The number of the light-emitting units electrically connected through the common layer of a single target is a, and the value range of the first preset number is 0.7a to 0.9a.

16. The display device according to claim 13, characterized in that: The display panel further comprises a first electrode layer disposed on a side of the second light-emitting layer away from the substrate and a second electrode layer disposed on a side of the first light-emitting layer facing the substrate, the first light-emitting layer comprises a plurality of first light-emitting structures disposed at intervals, the second light-emitting layer comprises a second light-emitting structure located on a side of the first light-emitting structure away from the substrate, the light-emitting unit comprises a single first light-emitting structure and a single second light-emitting structure whose orthographic projections overlap on the substrate, and the common layer is located between the first light-emitting structure and the second light-emitting structure of at least two of the light-emitting units, The display device further includes a control module, the first conductive portion is connected to the control module, and the control module is configured to: when the brightness of the light-emitting units less than a first preset number among the plurality of light-emitting units electrically connected through the single target common layer is less than a first preset brightness; and / or, when the brightness of the light-emitting units greater than or equal to the second preset number among the plurality of light-emitting units electrically connected through the single target common layer is greater than the first preset brightness, The control module controls the potential of the first conductive part connected to the target common layer to be between the potential of the first electrode layer and the potential of the second electrode layer, or the control module stops providing a signal to the first conductive part connected to the target common layer.

17. The display device according to claim 16, characterized in that: The number of the light-emitting units electrically connected through the single target common layer is a, the first preset number ranges from 0.7a to 0.9a, and / or the second preset number is equal to the difference between a and the first preset number.

18. The display device according to claim 13, characterized in that: The display panel further comprises a first electrode layer disposed on a side of the second light-emitting layer away from the substrate and a second electrode layer disposed on a side of the first light-emitting layer facing the substrate, the first light-emitting layer comprises a plurality of first light-emitting structures disposed at intervals, the second light-emitting layer comprises a second light-emitting structure located on a side of the first light-emitting structure away from the substrate, the light-emitting unit comprises a single first light-emitting structure and a single second light-emitting structure whose orthographic projections overlap on the substrate, and the light-emitting unit comprises a first type unit and a second type unit having different light-emitting colors, The display device further includes a control module, the first conductive portion is connected to the control module, and the control module is configured to: when the brightness of the first type of units having a number greater than or equal to a first preset color among the plurality of first type of units electrically connected through the single target common layer is less than a second preset brightness; And / or, when the brightness of the second-type units having more than or equal to the third preset color number among the plurality of second-type units electrically connected through the single target common layer is less than the third preset brightness, the control module controls the potential of the first conductive part connected to the target common layer to be less than or equal to the potential of the first electrode layer.

19. The display device according to claim 18, characterized in that The luminescent color of the first type of unit is green or blue, the luminescent color of the second type of unit is red, the number of the first type of units electrically connected through the common layer of a single target is b, and the number of the second type of units electrically connected through the common layer of a single target is c. The first preset color quantity has a value range of 0.25b to 0.35b; and / or the third preset color quantity has a value range of 0.45c to 0.55c.

20. The display device according to claim 13, characterized in that The display panel further comprises a first electrode layer disposed on a side of the second light-emitting layer away from the substrate and a second electrode layer disposed on a side of the first light-emitting layer facing the substrate, the first light-emitting layer comprises a plurality of first light-emitting structures disposed at intervals, the second light-emitting layer comprises a second light-emitting structure located on a side of the first light-emitting structure away from the substrate, the light-emitting unit comprises a single first light-emitting structure and a single second light-emitting structure whose orthographic projections overlap on the substrate, and the light-emitting unit comprises a first type unit and a second type unit having different light-emitting colors, The display device further includes a control module, the first conductive portion is connected to the control module, and the control module is configured to: when the brightness of the first type of units having less than the first preset color number among the plurality of the first type of units electrically connected through the single target common layer is less than the second preset brightness; and / or, when, among the plurality of the first-type units electrically connected through the single target common layer, the brightness of the first-type units having a number greater than or equal to the second preset color is greater than the second preset brightness; and / or, when, among the plurality of the second-type units electrically connected through the single target common layer, the brightness of the second-type units having a number less than the third preset color is less than the third preset brightness; and / or, when the brightness of the second type of units having a number greater than or equal to the fourth preset color among the plurality of second type of units electrically connected through the single target common layer is greater than the third preset brightness, The control module controls the potential of the first conductive part connected to the target common layer to be between the potential of the first electrode layer and the potential of the second electrode layer, or the control module stops providing a signal to the first conductive part connected to the target common layer.

21. The display device according to claim 20, characterized in that: The luminescent color of the first type of unit is green or blue, the luminescent color of the second type of unit is red, the number of the first type of units electrically connected through the common layer of a single target is b, and the number of the second type of units electrically connected through the common layer of a single target is c. Among them, the value range of the first preset color number is 0.25b to 0.35b; and / or, the second preset color number is equal to the difference between b and the first preset color number; and / or, the value range of the third preset color number is 0.45c to 0.55c; and / or, the fourth preset color number is equal to the difference between c and the third preset color number.

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