Display panel and electronic equipment

Abstract

The invention discloses a display panel and electronic equipment. The display panel comprises a packaging layer, a first cathode, a light-emitting layer and an anode which are arranged in a stacked mode. The display panel further comprises a first conductive layer arranged between the packaging layer and the first cathode, and the first conductive layer is electrically connected with the first cathode. The first conductive layer at least comprises light-transmitting areas arranged corresponding to the light-emitting units of the light-emitting layer.

Description

Technical Field

[0001] The present application relates to display technology, and particularly to a display panel and an electronic device. Background Art

[0002] The power consumption of an Organic Light-Emitting Diode (OLED) panel consists of two parts: logic power consumption and power consumption of the Emitting Layer (EL). Among them, the EL power consumption is determined by the current passing through the OLED panel and the voltage across both ends, and the formula is Power(EL) = I(OLED) * V(ELVDD - ELVSS input). For example, for an OLED panel, when the maximum brightness, I(OLED) is 800 mA, ELVDD is 4.6 V, and ELVSS input is -2.9 V, then its EL power consumption is 0.8 * [4.6 - (-2.9)] = 6 W. In fact, the voltage of ELVSS output may only need to be -1 V, but since OLED is a current-driven component, there is a voltage drop from the input to the output of ELVSS, even up to 2 V. To take into account the voltage drop problem and meet the requirements of pixel operation at the output end, the set value of ELVSS input is relatively large, resulting in the problem of excessive EL power consumption. Summary of the Invention

[0003] The present application provides a display panel and an electronic device.

[0004] The technical solution of the present application is implemented as follows:

[0005] In a first aspect, a display panel is provided, including: an encapsulation layer, a first cathode, a light-emitting layer, and an anode that are stacked;

[0006] Wherein, the display panel further includes a first conductive layer disposed between the encapsulation layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode;

[0007] The first conductive layer at least includes a light-transmitting region corresponding to the light-emitting units of the light-emitting layer.

[0008] In a second aspect, an electronic device is provided, including a housing having an accommodation space and a display panel disposed in the accommodation space of the housing. The display panel includes an encapsulation layer, a first cathode, a light-emitting layer, and an anode that are stacked;

[0009] Wherein, the display panel further includes a first conductive layer disposed between the encapsulation layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode;

[0010] The first conductive layer at least includes a light-transmitting region corresponding to the light-emitting units of the light-emitting layer.

[0011] The present application provides a display panel and an electronic device, including: an encapsulation layer, a first cathode, a light-emitting layer, and an anode that are stacked; wherein, the display panel further includes a first conductive layer disposed between the encapsulation layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode; the first conductive layer at least includes a light-transmitting region corresponding to the light-emitting unit of the light-emitting layer. Description of the Drawings

[0012] Figure 1 Structural schematic of the display panel in the embodiment of the present application Figure 1 ;

[0013] Figure 2 Structural schematic of the display panel in the embodiment of the present application Figure 2 ;

[0014] Figure 3 Top view schematic of the display panel in the embodiment of the present application Figure 1 ;

[0015] Figure 4 Structural schematic of the display panel in the embodiment of the present application Figure 3 ;

[0016] Figure 5 Structural schematic of the display panel in the embodiment of the present application Figure 4 ;

[0017] Figure 6 Top view schematic of the display panel in the embodiment of the present application Figure 2 ;

[0018] Figure 7 Structural schematic of the display panel in the embodiment of the present application Figure 5 . Detailed Embodiments

[0019] In order to be able to understand the features and technical content of the embodiments of the present application in more detail, the implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The accompanying drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing this embodiment and are not intended to limit this application.

[0021] In the following description, references are made to "some embodiments", "this embodiment", "the present embodiment", and examples, etc., which describe subsets of all possible embodiments. However, it is understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and may be combined with each other without conflict.

[0022] If similar descriptions such as "first / second" appear in the application documents, the following explanation shall be added. In the following description, the terms "first\second\third" only distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first\second\third" can be interchanged in a specific order or sequence when permitted, so that the present embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0023] In this embodiment, the term "and / or" only describes the association relationship of associated objects, indicating that there can be three relationships. For example, object A and / or object B can represent three situations: object A exists alone, object A and object B exist simultaneously, and object B exists alone.

[0024] An embodiment of the present application provides a display panel. Figure 1 It is a schematic structural diagram of the display panel in the embodiment of the present application. Figure 1 , as Figure 1 shown, the display panel includes: an encapsulation layer 20, a first cathode 22, a light-emitting layer 26, and an anode 28 which are stacked;

[0025] Among them, the display panel further includes a first conductive layer 21 disposed between the encapsulation layer 20 and the first cathode 22, and there is an electrical connection between the first conductive layer 21 and the first cathode 22;

[0026] The first conductive layer 21 includes at least a light-transmitting region corresponding to the light-emitting units of the light-emitting layer.

[0027] It should be noted that the first conductive layer can be a transparent conductive layer, that is, all are light-transmitting regions, or only light-transmitting regions are provided at the positions of the light-emitting units of the light-emitting layer, and the remaining regions are transparent conductive regions or non-transparent conductive regions.

[0028] Exemplarily, the conductive material of the first conductive layer can be indium tin oxide (ITO), or it can also be fluorine-doped tin oxide (FTO), or it can also be zinc oxide (ZnO).

[0029] In the embodiments of the present application, there is an electrical connection between the first conductive layer and the first cathode, that is, the first conductive layer and the first cathode are connected in parallel, which can reduce the cathode resistance of the entire display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and ultimately the purpose of reducing the EL power consumption can be achieved. In addition, the first conductive layer at least includes a light-transmitting region provided corresponding to the light-emitting unit of the light-emitting layer. By providing the light-transmitting region, the light extraction efficiency is not lost.

[0030] In some embodiments of the present application, the light-transmitting region is a first through-hole region obtained by digging a hole in the projection region of the light-emitting unit on the first conductive layer;

[0031] The area of the first through-hole region is larger than the area of the projection region;

[0032] In the embodiments of the present application, setting the area of the first through-hole region to be larger than the area of the projection region is to ensure that the light generated by the light-emitting unit is completely transmitted through the first through-hole region without additional loss of light-emitting brightness.

[0033] And / or,

[0034] There is a first distance between the edge of the first through-hole region and the edge of the projection region.

[0035] In the embodiments of the present application, there is a first distance between each edge of the first through-hole region and the corresponding edge of the projection region. Exemplarily, when the projection region and the first through-hole region are quadrilateral regions, there is a first distance between the four edges of the first through-hole region and the four edges of the projection region. The first distance can be set to 1.5 μm.

[0036] Or, there is a first distance between a certain edge of the first through-hole region and the corresponding edge of the projection region. The first distance can be set to 1.5 μm.

[0037] In the embodiments of the present application, setting there to be a first distance between the edge of the first through-hole region and the edge of the projection region is to ensure that the light generated by the light-emitting unit is completely transmitted through the first through-hole region without additional loss of light-emitting brightness.

[0038] In some embodiments of the present application, it further includes:

[0039] An organic material layer provided between the first cathode and the light-emitting layer, and a plurality of support structures provided on a side of the organic material layer facing the first cathode;

[0040] The support structure penetrates through the first cathode and abuts against the first conductive layer, and a second cathode electrically connected to the first cathode is attached to the surface of the support structure, and the first conductive layer is electrically connected to the first cathode through the second cathode;

[0041] It should be noted that the organic material layer includes, but is not limited to, an electron transport layer and an electron injection layer.

[0042] It should be noted that the support structure can be arranged offset or staggered with respect to the projection area of the light-emitting unit.

[0043] In the embodiment of the present application, the first conductive layer is electrically connected to the first cathode through the second cathode, that is, the first conductive layer is connected in parallel with the second cathode and the first cathode, which can reduce the cathode resistance of the entire display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and ultimately the purpose of reducing the EL power consumption can be achieved.

[0044] And / or

[0045] The distance between the edge of the first through-hole region and the edge of the projection region is the same or different;

[0046] In the embodiment of the present application, the distance between each edge of the first through-hole region and each edge of the projection region is a first distance, that is, the distances are the same. The first distance can be set to 1.5 μm.

[0047] Alternatively, the distances between each edge of the first through-hole region and each edge of the projection region are different. Exemplarily, when the projection region and the first through-hole region are quadrilateral regions, there is a first sub-distance between the first edge of the first through-hole region and the first edge of the projection region, a second sub-distance between the second edge of the first through-hole region and the second edge of the projection region, a third sub-distance between the third edge of the first through-hole region and the third edge of the projection region, and a fourth sub-distance between the fourth edge of the first through-hole region and the fourth edge of the projection region, and the first sub-distance, the second sub-distance, the third sub-distance, and the fourth sub-distance are all different. The first distance includes the first sub-distance, the second sub-distance, the third sub-distance, and the fourth sub-distance.

[0048] Alternatively, the distances between different corresponding side edges of the first through-hole region and the corresponding edges of the projection region are different. Exemplarily, when the projection region and the first through-hole region are quadrilateral regions, the distance between one corresponding side edge of the first through-hole region and the corresponding edge of the projection region is a fifth sub-distance, and the distance between the other corresponding side edge of the first through-hole region and the corresponding edge of the projection region is a sixth sub-distance, and the fifth sub-distance and the sixth sub-distance are different. The first distance includes the fifth sub-distance and the sixth sub-distance.

[0049] And / or

[0050] The distance between the edge of the first through-hole region and the edge of the projection region is related to the thickness of the first cathode to the encapsulation layer or the height of the support structure in the support direction;

[0051] In the embodiments of the present application, based on the thickness from the first cathode to the encapsulation layer or the height in the supporting direction of the supporting structure, such as 1.5 μm, the horizontal offset of the light rays emitted at different angles when reaching the inner surface of the encapsulation layer is calculated as shown in Table 1. Based on this, for notebooks, the observer's viewing angle is usually not greater than 45°. Therefore, the distance between the edge of the first through-hole area and the edge of the projection area is set to 1.5 μm, so as to ensure that the light rays within the range of 45° are completely transmitted through the first through-hole area without additional loss of luminous brightness. For mobile phones or watches, the observer's viewing angle is usually not greater than 60°. Therefore, the distance between the edge of the first through-hole area and the edge of the projection area is set to 2.6 μm, so as to ensure that the light rays within the range of 60° are completely transmitted through the first through-hole area without additional loss of luminous brightness. It should be noted that the horizontal offset of the light rays is related to the Cell Gap and may vary slightly due to different suppliers or manufacturers. Among them, the interval between the first cathode and the encapsulation layer is called the Cell Gap, that is, the liquid crystal layer gap.

[0052] Table 1 is a schematic diagram of different light ray horizontal offsets corresponding to different angles

[0053] Angle / ° Tan value Horizontal light offset / μm 60 1.732051 2.598076104 45 1 1.49999996 30 0.57735 0.866025386 20 0.36397 0.545955341 10 0.176327 0.264490466 5 0.087489 0.131232993

[0054] And / or

[0055] The thickness of the second cathode is greater than the thickness of the first cathode.

[0056] In the embodiments of the present application, the first cathode is the cathode corresponding to the light-transmitting area in the vertical direction, and the second cathode is the cathode corresponding to the non-light-transmitting area in the vertical direction. By setting the thickness of the second cathode in the non-light-transmitting area to be greater than the thickness of the first cathode in the light-transmitting area, the purpose of reducing the cathode resistance and not affecting the light-emitting performance can be achieved. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption can be achieved.

[0057] It should be noted that the thickness of the second cathode is greater than the thickness of the first cathode. The thicker the second cathode, the smaller the cathode resistance of the entire display panel. Therefore, the second cathode should be as thick as possible.

[0058] Based on the above embodiments, a specific example of the present application is a display panel Figure 2 is a schematic structural diagram of the display panel in the embodiments of the present application Figure 2 , such as Figure 2As shown, the display panel includes a stacked encapsulation glass 20 (i.e., an encapsulation layer), a first cathode 22, a light-emitting layer 26, and an anode 28; and also includes a transparent conductive layer 21 (i.e., a first conductive layer), a support structure 23, a second cathode 24, a first organic material layer 25, a second organic material layer 27, and a backplane 29;

[0059] The support structure 23 penetrates the first cathode 22 and abuts against the transparent conductive layer 21. The surface of the support structure 23 is attached with a second cathode 24 electrically connected to the first cathode 22. The transparent conductive layer 21 is electrically connected to the first cathode 22 through the second cathode 24. That is, the transparent conductive layer is connected in parallel with the second cathode and the first cathode, which can reduce the cathode resistance of the entire display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and the purpose of reducing EL power consumption can be finally achieved.

[0060] The transparent conductive layer includes a light-transmitting region, namely a first through-hole region 211, which is arranged corresponding to the position of the light-emitting unit of the light-emitting layer, and a conductive region 212 other than the light-transmitting region. The light-transmitting region is arranged so as not to lose light extraction efficiency.

[0061] The projection area of ​​the light-emitting layer 26 is staggered with the support structure 23;

[0062] The first cathode 22 is connected to the light-emitting layer 26 through the first organic material layer 25; the light-emitting layer 26 includes a red light-emitting layer 261, a green light-emitting layer 262 and a blue light-emitting layer 263;

[0063] The light emitting layer 26 is connected to the anode 28 through the second organic material layer 27 ; the anode 28 is connected to the back plate 29 .

[0064] In the embodiment of the present application, the thickness of the first cathode may be consistent with the thickness of the second cathode.

[0065] Figure 3 A schematic top view of a display panel in an embodiment of the present application Figure 1 ,like Figure 3 As shown, its top view is Figure 2 The top view of the display panel shown in the figure shows that the transparent conductive layer 21 is patterned, and the projection area 31 of the red light-emitting layer, the projection area 32 of the blue light-emitting layer, and the projection area 33 of the green light-emitting layer are set as through-hole areas, that is, there is no conductive material.

[0066] In order to avoid loss of light extraction efficiency, the holes in the conductive material should be slightly larger than the light-emitting areas of each sub-pixel, that is, there is a certain distance between the edge of the first through hole area and the edge of each projection area.

[0067] Generally, the thickness from the first cathode to the encapsulation layer is about 1 - 1.5 μm. Here, taking the thickness from the first cathode to the encapsulation layer as 1.5 μm as an example, for a notebook, the observer's viewing angle is usually not greater than 45°. Therefore, the distance between each edge of the first through-hole region and the edge of each projection region is set to 1.5 μm, so as to ensure that the light within the 45° range completely passes through the first through-hole region and is transmitted without additional loss of luminous brightness. For a mobile phone or a watch, the observer's viewing angle is usually not greater than 60°. Therefore, the distance between each edge of the first through-hole region and the edge of each projection region is set to 2.6 μm, so as to ensure that the light within the 60° range completely passes through the first through-hole region and is transmitted without additional loss of luminous brightness.

[0068] Based on the above embodiments, estimated by a 14-inch OLED, adding a conductive layer can reduce the EL power consumption by 7%. Additionally, compared with the traditional development of new OLED materials, this solution is easier to implement and can be introduced faster.

[0069] In some embodiments of the present application, the first conductive layer is a transparent conductive layer, and the light-transmitting region is a groove structure obtained by digging holes in the projection region of the light-emitting unit on the first conductive layer;

[0070] The notch area and / or the bottom area of the groove structure is greater than the area of the projection region;

[0071] In the embodiments of the present application, for the projection region of each light-emitting unit on the first conductive layer, the conductive layer is not completely hollowed out, but has a thinner thickness. The thickness of the conductive layer in this projection region is less than the thickness of the remaining conductive regions. The first conductive layer is electrically connected to the first cathode, which can reduce the cathode resistance of the overall display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, ultimately achieving the purpose of reducing the EL power consumption. Additionally, setting the notch area and / or the bottom area of the groove structure to be greater than the area of the projection region, and setting the first conductive layer as a transparent conductive layer is to ensure that the light generated by the light-emitting unit is transmitted through the light-transmitting region as much as possible, reducing the loss of luminous brightness.

[0072] And / or,

[0073] There is a second distance between the groove wall of the groove structure and the edge of the projection region.

[0074] In the embodiments of the present application, there is a second spacing between each groove wall of the groove structure and the corresponding edge of the projection area. Alternatively, there is a second spacing between a certain groove wall of the groove structure and the corresponding edge of the projection area. For a notebook, the observer's viewing angle is usually not greater than 45°, so the second spacing can be set to 1.5μm ± 0.5μm. For a mobile phone or a watch, the observer's viewing angle is usually not greater than 60°, so the second spacing can be set to 2.6μm ± 0.5μm.

[0075] Here, setting a second spacing between the groove wall of the groove structure and the edge of the projection area is to ensure that the light generated by the light-emitting unit is transmitted through the light-transmitting area as much as possible, reducing the loss of light-emitting brightness.

[0076] In some embodiments of the present application, the groove structure is opened on the side of the first conductive layer facing the encapsulation layer, or on the side of the first conductive layer facing the first cathode;

[0077] And / or,

[0078] The depth of the groove structure is related to the light transmittance and / or material of the first conductive layer.

[0079] In the embodiments of the present application, the depth of the groove structure is related to the light transmittance and / or material of the first conductive layer. That is to say, the depth of the groove structure affects the light transmittance of the first conductive layer. The shallower the depth of the groove structure, the smaller the cathode resistance and the lower the light transmittance of the first conductive layer. Correspondingly, the deeper the depth of the groove structure, the greater the cathode resistance and the higher the light transmittance of the first conductive layer.

[0080] Based on this, in order to ensure that the light generated by the light-emitting unit is completely transmitted through the light-transmitting area without additional loss of light-emitting brightness, when setting the depth of the groove structure, it is necessary to find a balance between maintaining a small cathode resistance and achieving a high light transmittance.

[0081] Based on the above embodiments, the present application specifically exemplifies a display panel, Figure 4 which is a schematic structural diagram of the display panel in the embodiments of the present application Figure 3 , as Figure 4 shown, the display panel includes a stacked encapsulation glass 20 (i.e., the encapsulation layer), a first cathode 22, a light-emitting layer 26, and an anode 28; it also includes a transparent conductive layer 21, a support structure 23, a second cathode 24, a first organic material layer 25, a second organic material layer 27, and a backplane 29;

[0082] The support structure 23 penetrates the first cathode 22 and abuts against the transparent conductive layer 21. The surface of the support structure 23 is attached with a second cathode 24 electrically connected to the first cathode 22. The transparent conductive layer 21 is electrically connected to the first cathode 22 through the second cathode 24. That is, the transparent conductive layer is connected in parallel with the second cathode and the first cathode, which can reduce the cathode resistance. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption is achieved.

[0083] The first conductive layer includes a groove structure 213 arranged at a position corresponding to the light-emitting unit of the light-emitting layer, and other conductive regions 212. The light-transmitting region is arranged so as not to lose light extraction efficiency.

[0084] The projection area of ​​the light-emitting layer 26 is staggered with the support structure 23;

[0085] The first cathode 22 is connected to the light-emitting layer 26 through the first organic material layer 25; the light-emitting layer 26 includes a red light-emitting layer 261, a green light-emitting layer 262 and a blue light-emitting layer 263;

[0086] The light emitting layer 26 is connected to the anode 28 through the second organic material layer 27 ; the anode 28 is connected to the back plate 29 .

[0087] In the embodiment of the present application, the thickness of the first cathode may be consistent with the thickness of the second cathode.

[0088] In the embodiment of the present application, for notebooks, the observer's viewing angle is usually not greater than 45°, so the second spacing between each groove wall of the groove structure and the corresponding edge of the projection area can be set to 1.5μm±0.5μm. For mobile phones or watches, the observer's viewing angle is usually not greater than 60°, so the second spacing between each groove wall of the groove structure and the corresponding edge of the projection area can be set to 2.6μm±0.5μm.

[0089] In the embodiment of the present application, in order to ensure that the light generated by the light-emitting unit is completely transmitted through the light-transmitting area without additional loss of luminous brightness, when setting the depth of the groove structure, it is necessary to find a balance between maintaining a small cathode resistance and achieving a higher transmittance.

[0090] In some embodiments of the present application, the light-transmitting area is a second through-hole area obtained by digging a projection area of ​​the light-emitting unit on the first conductive layer, and a third distance exists between an edge of the second through-hole area and an edge of the projection area;

[0091] The display panel further includes a second conductive layer disposed in a first region of the first conductive layer, where the first region is the region of the first conductive layer excluding the second via region, and the second conductive layer is disposed on the surface of the first region facing the first cathode;

[0092] There is an electrical connection between the second conductive layer and the first conductive layer;

[0093] In an embodiment of the present application, there is a third spacing between each edge of the second via region and the corresponding edge of the projection region. Exemplarily, when the projection region and the second via region are quadrilateral regions, there is a third spacing between the four edges of the second via region and the four edges of the projection region. The third spacing can be set to 1.5 μm.

[0094] Alternatively, there is a third spacing between a certain edge of the second via region and the corresponding edge of the projection region. The third spacing can be set to 1.5 μm.

[0095] In an embodiment of the present application, setting a third spacing between the edge of the second via region and the edge of the projection region is to ensure that the light generated by the light-emitting unit completely passes through the second via region and is transmitted out, without additional loss of light-emitting brightness.

[0096] In an embodiment of the present application, there is an electrical connection between the second conductive layer and the first conductive layer, and there is an electrical connection between the first conductive layer and the first cathode, that is, the second conductive layer, the first conductive layer, and the first cathode are connected in parallel, which can reduce the cathode resistance of the overall display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and ultimately the purpose of reducing the EL power consumption can be achieved.

[0097] And / or, the display panel further includes a plurality of support structures passing through the first cathode and abutting against the second conductive layer, and a second cathode electrically connected to the first cathode is attached to the surface of the support structure, and the first conductive layer is electrically connected to the first cathode through the second conductive layer and the second cathode.

[0098] In an embodiment of the present application, the first conductive layer is electrically connected to the first cathode through the second conductive layer and the second cathode, that is, the first conductive layer, the second conductive layer, the second cathode, and the first cathode are connected in parallel, which can reduce the cathode resistance of the overall display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and ultimately the purpose of reducing the EL power consumption can be achieved.

[0099] In some embodiments of the present application, the resistivity of the second conductive layer is less than that of the first conductive layer;

[0100] In the embodiment of the present application, the second conductive layer may be a metal conductive layer with low resistivity. The material of the metal conductive layer includes but is not limited to molybdenum (Mo) and aluminum (Al).

[0101] And / or, the first conductive layer is a transparent conductive layer;

[0102] And / or, the second conductive layer is a transparent conductive layer or an opaque conductive layer.

[0103] For example, the conductive material of the transparent conductive layer includes, but is not limited to, ITO, FTO and ZnO. The conductive material of the opaque conductive layer includes, but is not limited to, Mo and Al.

[0104] Based on the above embodiments, the present application specifically illustrates a display panel. Figure 5 The structure of the display panel in the embodiment of the present application is shown in FIG. Figure 4 ,like Figure 5 As shown, the display panel includes a stacked encapsulation glass 20 (i.e., an encapsulation layer), a first cathode 22, a light-emitting layer 26, and an anode 28; and also includes a transparent conductive layer 21, a support structure 23, a second cathode 24, a first organic material layer 25, a second organic material layer 27, and a backplane 29;

[0105] Among them, the support structure 23 penetrates the first cathode 22 and abuts against the metal conductive layer 30 (i.e., the second conductive layer), the surface of the support structure 23 is attached with the second cathode 24 electrically connected to the first cathode 22, and the transparent conductive layer 21 is electrically connected to the first cathode 22 through the metal conductive layer 30 and the second cathode 24; that is, the transparent conductive layer, the metal conductive layer, the second cathode and the first cathode are connected in parallel, which can reduce the cathode resistance. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption is achieved.

[0106] The transparent conductive layer includes a second through hole region 214 arranged at a position corresponding to the light emitting unit of the light emitting layer, and other conductive regions 212. The second through hole region is arranged so as not to lose light extraction efficiency.

[0107] The projection area of ​​the light-emitting layer 26 is staggered with the support structure 23;

[0108] The first cathode 22 is connected to the light-emitting layer 26 through the first organic material layer 25; the light-emitting layer 26 includes a red light-emitting layer 261, a green light-emitting layer 262 and a blue light-emitting layer 263;

[0109] The light emitting layer 26 is connected to the anode 28 through the second organic material layer 27 ; the anode 28 is connected to the back plate 29 .

[0110] In the embodiment of the present application, the thickness of the first cathode may be consistent with the thickness of the second cathode.

[0111] In the embodiments of the present application, for a notebook, the observer's viewing angle is usually not greater than 45°. Therefore, the third spacing between each edge of the second through-hole region and the corresponding edge of the projection region can be set to 1.5 μm ± 0.5 μm. For a mobile phone or a watch, the observer's viewing angle is usually not greater than 60°. Therefore, the third spacing between each edge of the second through-hole region and the corresponding edge of the projection region can be set to 2.6 μm ± 0.5 μm.

[0112] In the embodiments of the present application Figure 2 Based on the shown display panel, an opaque and low-resistivity metal conductive layer is added in the non-drilled region of the transparent conductive layer, and the cathode resistance will be further reduced.

[0113] Figure 6 Schematic top view of the display panel in the embodiments of the present application Figure 2 , as Figure 6 shown, its top view is Figure 5 the top view of the display panel shown, and the metal conductive layer 30 can be seen in the top view. The through-hole regions are set in the projection region 31 of the red light-emitting layer, the projection region 32 of the blue light-emitting layer, and the projection region 33 of the green light-emitting layer, that is, there is no conductive material.

[0114] In order to avoid loss of light extraction efficiency, the holes where the conductive material is drilled are slightly larger than the light-emitting regions of each sub-pixel. That is, there is a certain spacing between the edge of the second through-hole region and the edge of each projection region.

[0115] Generally, the thickness from the first cathode to the encapsulation layer is about 1 - 1.5 μm. Here, taking the thickness from the first cathode to the encapsulation layer as 1.5 μm as an example, for a mobile phone or a watch, the observer's viewing angle is usually not greater than 60°. Therefore, the spacing between each edge of the first through-hole region and the edge of each projection region is set to 2.6 μm, so as to ensure that the light within the range of 60° is completely transmitted through the first through-hole region without additional loss of light emission brightness. For a notebook, the observer's viewing angle is usually not greater than 45°. Therefore, the spacing between each edge of the second through-hole region and the edge of each projection region is set to 1.5 μm, so as to ensure that the light within the range of 45° is completely transmitted through the first through-hole region without additional loss of light emission brightness.

[0116] In some embodiments of the present application, the first cathode includes a first cathode portion corresponding to the light-emitting unit of the light-emitting layer and a second cathode portion other than the first cathode portion;

[0117] The thickness of the first cathode portion is less than the thickness of the second cathode portion;

[0118] In the embodiment of the present application, the thickness of the first cathode part corresponding to the light-emitting unit of the light-emitting layer included in the first cathode is set to be smaller than the thickness of the second cathode part other than the first cathode part, so as to reduce the cathode resistance of the overall display panel without affecting the light-emitting performance. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption is achieved.

[0119] It should be noted that the thickness of the first cathode part can be the same as the existing cathode thickness, the thickness of the second cathode part is greater than that of the first cathode part, and the thicker the second cathode part, the smaller the cathode resistance of the overall display panel. Therefore, the second cathode part should be as thick as possible.

[0120] And / or,

[0121] At least a part of the second cathode part further penetrates through the organic material layer between the first cathode and the light-emitting layer and abuts against the backplane where the anode is located.

[0122] In the embodiment of the present application, a part of the second cathode part further penetrates through the organic material layer between the first cathode and the light-emitting layer and abuts against the backplane where the anode is located through a metal component. Or, the whole of the second cathode part further penetrates through the organic material layer between the first cathode and the light-emitting layer and abuts against the backplane where the anode is located through a metal component.

[0123] In the embodiment of the present application, at least a part of the second cathode part further penetrates through the organic material layer between the first cathode and the light-emitting layer and abuts against the backplane where the anode is located, which can reduce the cathode resistance of the overall display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption is achieved.

[0124] Based on the above embodiments, the present application specifically exemplifies a display panel. Figure 7 It is a schematic structural diagram of the display panel in the embodiment of the present application. Figure 5 , as Figure 7 shown, the display panel includes a stacked encapsulation glass 20 (i.e., an encapsulation layer), a first cathode 22, a light-emitting layer 26, and an anode 28; it also includes a transparent conductive layer 21, a support structure 23, a second cathode 24, a first organic material layer 25, a second organic material layer 27, and a backplane 29;

[0125] Among them, the support structure 23 penetrates through the first cathode 22 and abuts against the metal conductive layer 30 (i.e., the second conductive layer), the surface of the support structure 23 is coated with a second cathode 24 electrically connected to the first cathode 22, and the transparent conductive layer 21 is electrically connected to the first cathode 22 through the metal conductive layer 30 and the second cathode 24;

[0126] Here, the transparent conductive layer 21 is electrically connected to the first cathode 22 through the metal conductive layer 30 and the second cathode 24, that is, the transparent conductive layer, the metal conductive layer, the second cathode and the first cathode are connected in parallel, which can reduce the cathode resistance. The thickness of the first cathode portion 221 of the first cathode 22 corresponding to the light-emitting unit of the light-emitting layer is set to be less than the thickness of the second cathode portion 222 other than the first cathode portion 221, and a part of the second cathode portion 222 also penetrates through the second organic material layer 27 disposed between the first cathode 22 and the light-emitting layer 26 and abuts against the backplane 29 where the anode 28 is located through a metal component 31, so that the cathode resistance can be further reduced without affecting the light extraction performance. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and finally the purpose of reducing the EL power consumption can be achieved. Among them, the metal component can be on the same layer as the anode, but is not electrically connected to the anode, but is electrically connected to the cathode.

[0127] The transparent conductive layer includes a second via region 214 provided at a position corresponding to the light-emitting unit of the light-emitting layer and the remaining conductive regions 212. By providing the second via region, the light extraction efficiency is not lost.

[0128] Among them, the projection area of the light-emitting layer 26 is staggeredly arranged with the support structure 23;

[0129] The first cathode 22 is connected to the light-emitting layer 26 through the first organic material layer 25; the light-emitting layer 26 includes a red light-emitting layer 261, a green light-emitting layer 262 and a blue light-emitting layer 263;

[0130] The light-emitting layer 26 is connected to the anode 28 through the second organic material layer 27; the anode 28 is connected to the backplane 29.

[0131] In the embodiment of the present application, the thickness of the first cathode portion may be the same as the thickness of the second cathode.

[0132] In the embodiment of the present application, for a notebook, the observer's viewing angle is usually not greater than 45°. Therefore, the third distance between each edge of the second via region and the corresponding edge of the projection area can be set to 1.5 μm ± 0.5 μm. For a mobile phone or a watch, the observer's viewing angle is usually not greater than 60°. Therefore, the third distance between each edge of the second via region and the corresponding edge of the projection area can be set to 2.6 μm ± 0.5 μm.

[0133] In some embodiments of the present application, it further includes: a first resistor connected in parallel with the first cathode and / or a second resistor connected in parallel with the first conductive layer;

[0134] In the embodiments of the present application, a first resistor connected in parallel with the first cathode is provided, and / or a second resistor connected in parallel with the first conductive layer is provided, so as to reduce the cathode resistance of the overall display panel. By reducing the cathode resistance, the absolute value of the cathode voltage can be further reduced, and ultimately the purpose of reducing the EL power consumption can be achieved.

[0135] And / or,

[0136] The shapes and / or areas of the light-transmitting regions corresponding to different light-emitting units of the light-emitting layer are the same or different.

[0137] Exemplarily, the different light-emitting units may be RGB light-emitting units.

[0138] The embodiments of the present application further provide an electronic device, which includes: a housing having an accommodation space and a display panel disposed in the accommodation space of the housing, and the display panel includes a packaging layer, a first cathode, a light-emitting layer, and an anode stacked;

[0139] Wherein, the display panel further includes a first conductive layer disposed between the packaging layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode;

[0140] The first conductive layer at least includes a light-transmitting region provided corresponding to the light-emitting unit of the light-emitting layer.

[0141] In some embodiments of the present application, the light-transmitting region is a first through-hole region obtained by punching holes in the projection region of the light-emitting unit on the first conductive layer; the area of the first through-hole region is larger than the area of the projection region; and / or, there is a first distance between the edge of the first through-hole region and the edge of the projection region.

[0142] In some embodiments of the present application, an organic material layer is disposed between the first cathode and the light-emitting layer, and a plurality of support structures are disposed on a side of the organic material layer facing the first cathode; the support structures penetrate through the first cathode and abut against the first conductive layer, and a second cathode electrically connected to the first cathode is attached to the surface of the support structure, and the first conductive layer is electrically connected to the first cathode through the second cathode; and / or, the distances between the edge of the first through-hole region and the edge of the projection region are the same or different; and / or, the distance between the edge of the first through-hole region and the edge of the projection region is related to the thickness of the first cathode to the packaging layer or the height of the support structure in the support direction; and / or, the thickness of the second cathode is greater than the thickness of the first cathode.

[0143] In some embodiments of the present application, the first conductive layer is a transparent conductive layer, and the light-transmitting region is a groove structure obtained by digging holes in the projection region of the light-emitting unit on the first conductive layer; the notch area and / or the bottom area of the groove structure is greater than the area of the projection region; and / or, there is a second spacing between the groove wall of the groove structure and the edge of the projection region.

[0144] In some embodiments of the present application, the groove structure is formed on the side of the first conductive layer facing the encapsulation layer, or on the side of the first conductive layer facing the first cathode; and / or, the depth of the groove structure is related to the light transmittance and / or material of the first conductive layer.

[0145] In some embodiments of the present application, the light-transmitting region is a second through-hole region obtained by digging holes in the projection region of the light-emitting unit on the first conductive layer, and there is a third spacing between the edge of the second through-hole region and the edge of the projection region; the display panel further includes a second conductive layer disposed in a first region of the first conductive layer, where the first region is the region of the first conductive layer excluding the second through-hole region, and the second conductive layer is disposed on the surface of the first region facing the first cathode; there is an electrical connection between the second conductive layer and the first conductive layer; and / or, the display panel further includes a plurality of support structures passing through the first cathode and abutting against the second conductive layer, and a second cathode electrically connected to the first cathode is attached to the surface of the support structure, and the first conductive layer is electrically connected to the first cathode through the second conductive layer and the second cathode.

[0146] In some embodiments of the present application, the resistivity of the second conductive layer is less than that of the first conductive layer; and / or, the first conductive layer is a transparent conductive layer; and / or, the second conductive layer is a transparent conductive layer or an opaque conductive layer.

[0147] In some embodiments of the present application, the first cathode includes a first cathode portion corresponding to the light-emitting unit of the light-emitting layer and a second cathode portion other than the first cathode portion; the thickness of the first cathode portion is less than the thickness of the second cathode portion; and / or, at least a part of the second cathode portion further penetrates through the organic material layer between the first cathode and the light-emitting layer and abuts against the backplane where the anode is located.

[0148] In some embodiments of the present application, a first resistor connected in parallel with the first cathode and / or a second resistor connected in parallel with the first conductive layer; and / or, the shapes and / or areas of the light-transmitting regions corresponding to different light-emitting units of the light-emitting layer are the same or different.

[0149] The features disclosed in several product embodiments provided by this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0150] As described above, it is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application.

Claims

1. A display panel, comprising: A stacked encapsulation layer, a first cathode, a light-emitting layer and an anode; Wherein, the display panel further comprises a first conductive layer disposed between the encapsulation layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode; The first conductive layer at least includes a light-transmitting area arranged corresponding to the light-emitting unit of the light-emitting layer.

2. The display panel according to claim 1, wherein: The light-transmitting area is a first through-hole area obtained by digging a projection area of ​​the light-emitting unit on the first conductive layer; The area of ​​the first through hole region is larger than the area of ​​the projection region; and / or, There is a first distance between the edge of the first through hole area and the edge of the projection area.

3. The display panel according to claim 2, wherein: Also includes: an organic material layer disposed between the first cathode and the light-emitting layer, and a plurality of supporting structures disposed on a side of the organic material layer facing the first cathode; The support structure penetrates the first cathode and abuts against the first conductive layer, and a second cathode electrically connected to the first cathode is attached to the surface of the support structure, and the first conductive layer is electrically connected to the first cathode through the second cathode; and / or, The distances between the edge of the first through hole area and the edge of the projection area are the same or different; and / or, The distance between the edge of the first through hole area and the edge of the projection area is related to the thickness from the first cathode to the encapsulation layer or the height of the support structure in the support direction; and / or, The second cathode has a thickness greater than that of the first cathode.

4. The display panel according to claim 1, wherein: The first conductive layer is a transparent conductive layer, and the light-transmitting area is a groove structure obtained by digging a hole in a projection area of ​​the light-emitting unit on the first conductive layer; The notch area and / or the groove bottom area of ​​the groove structure are larger than the area of ​​the projection area; and / or, There is a second distance between the groove wall of the groove structure and the edge of the projection area.

5. The display panel according to claim 4, wherein: The groove structure is opened on a side of the first conductive layer facing the encapsulation layer, or is opened on a side of the first conductive layer facing the first cathode; and / or, The depth of the groove structure is related to the light transmittance and / or material of the first conductive layer.

6. The display panel according to claim 1, wherein: The light-transmitting area is a second through-hole area obtained by digging a hole in the projection area of ​​the light-emitting unit on the first conductive layer, and a third distance exists between an edge of the second through-hole area and an edge of the projection area; The display panel further includes a second conductive layer disposed in a first region of the first conductive layer, the first region being a region of the first conductive layer excluding the second through hole region, and the second conductive layer being disposed on a surface of the first region facing the first cathode; There is electrical connection between the second conductive layer and the first conductive layer; and / or, The display panel also includes a plurality of support structures that penetrate the first cathode and abut against the second conductive layer. A second cathode electrically connected to the first cathode is attached to a surface of the support structure. The first conductive layer is electrically connected to the first cathode through the second conductive layer and the second cathode.

7. The display panel according to claim 6, wherein: The resistivity of the second conductive layer is lower than that of the first conductive layer; and / or, The first conductive layer is a transparent conductive layer; and / or, The second conductive layer is a transparent conductive layer or an opaque conductive layer.

8. The display panel according to claim 6, wherein: The first cathode includes a first cathode portion corresponding to a light emitting unit of the light emitting layer and a second cathode portion except the first cathode portion; The thickness of the first cathode portion is smaller than the thickness of the second cathode portion; and / or, At least a portion of the second cathode portion also penetrates the organic material layer disposed between the first cathode and the light-emitting layer, and abuts against the back plate where the anode is located.

9. The display panel according to claim 1, wherein: Also included: a first resistor connected in parallel with the first cathode and / or a second resistor connected in parallel with the first conductive layer; and / or, The shapes and / or areas of the light-transmitting regions of different light-emitting units of the corresponding light-emitting layer are the same or different.

10. An electronic device, comprising a housing having a storage space and a display panel arranged in the storage space of the housing, wherein the display panel comprises a stacked packaging layer, a first cathode, a light-emitting layer and an anode; in, The display panel further includes a first conductive layer disposed between the encapsulation layer and the first cathode, and there is an electrical connection between the first conductive layer and the first cathode; The first conductive layer at least includes a light-transmitting area arranged corresponding to the light-emitting unit of the light-emitting layer.

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