Display panel and display device

Abstract

The utility model provides a display panel and a display device, relates to the technical field of display, and solves the problems of poor image quality performance and overhigh cost of a display product comprising serially connected luminescent devices. The display panel comprises a substrate and a plurality of light-emitting units arranged on the substrate, wherein each light-emitting unit comprises sub-pixels of at least two colors; in the sub-pixels of the at least two colors, the sub-pixel of the first color comprises at least one first light-emitting layer, the sub-pixel of the second color comprises at least two second light-emitting layers which are arranged in a stacked mode, and the number of the second light-emitting layers is larger than that of the first light-emitting layers; the second color sub-pixel further comprises at least one second charge generation layer, and at least part of the second charge generation layer farthest from the substrate is located between the two second light-emitting layers farthest from the substrate; the orthographic projection of the second charge generation layer farthest from the substrate on the substrate is not overlapped with the orthographic projection of the pixel opening area of the first color sub-pixel on the substrate.

Description

TECHNICAL FIELD

[0001] The utility model relates to display technical field especially relates to a display panel and display device. BACKGROUND

[0002] With the continuous development of display technology, consumers' requirements for display brightness and life of display products are higher and higher. The conventional display products including single-layer light emitting devices can not meet the needs of consumers for brightness and life, and the display products including tandem light emitting devices commonly used at present can overcome the above problems, but have the problems of poor picture quality and high cost. SUMMARY

[0003] The utility model discloses a display panel and display device, which are used to solve the problems of poor picture quality and high cost of display products including tandem light emitting devices.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] The utility model discloses a display panel, comprising: substrate substrate and set up on the substrate substrate multiple light emitting unit, the light emitting unit includes at least two colors of sub -pixels;

[0006] Among the at least two colors of sub -pixels, the first color sub -pixel includes at least one layer first light emitting layer, and the second color sub -pixel includes at least two layers of second light emitting layer of laminated arrangement, and the number of second light emitting layer is greater than the number of first light emitting layer;The second color sub -pixel still includes at least one layer second charge generation layer, and at least part of the second charge generation layer farthest from the substrate substrate is located between two second light emitting layers farthest from the substrate substrate;

[0007] The orthographic projection of the second charge generation layer farthest from the substrate substrate on the substrate substrate does not overlap with the orthographic projection of the pixel opening area of the first color sub -pixel on the substrate substrate.

[0008] Optionally, the first color sub -pixel includes one layer first light emitting layer, and the second color sub -pixel includes two layers of second light emitting layer of laminated arrangement, and the second color sub -pixel still includes one layer second charge generation layer, and at least part of the second charge generation layer is located between two second light emitting layers.

[0009] Optionally, the first color sub -pixel includes two layers of first light emitting layer of laminated arrangement and one layer first charge generation layer located between the two layers of first light emitting layer;

[0010] The second color sub-pixel comprises, in sequence from the direction away from the substrate, a first layer of second light-emitting layer, a second layer of second light-emitting layer, and a third layer of second light-emitting layer, and further comprises a first layer of second charge generation layer and a second layer of second charge generation layer, the first layer of second charge generation layer is located between the first layer of second light-emitting layer and the second layer of second light-emitting layer, and the second layer of second charge generation layer is located between the second layer of second light-emitting layer and the third layer of second light-emitting layer.

[0011] The normal projection of the second layer of second charge generation layer on the substrate does not overlap with the normal projection of the pixel opening area of the first color sub-pixel on the substrate.

[0012] Optionally, the first charge generation layer and the first layer of second charge generation layer are arranged in the same layer and are made of the same material.

[0013] The first charge generation layer and the first layer of second charge generation layer are independent of each other, or the first charge generation layer and the first layer of second charge generation layer form a common charge generation layer in an integrated structure.

[0014] Optionally, the first color sub-pixel comprises one layer of the first light-emitting layer.

[0015] The second color sub-pixel comprises, in sequence from the direction away from the substrate, a first layer of second light-emitting layer, a second layer of second light-emitting layer, and a third layer of second light-emitting layer, and further comprises a first layer of second charge generation layer and a second layer of second charge generation layer, the first layer of second charge generation layer is located between the first layer of second light-emitting layer and the second layer of second light-emitting layer, and the second layer of second charge generation layer is located between the second layer of second light-emitting layer and the third layer of second light-emitting layer.

[0016] The normal projection of the first layer of second charge generation layer on the substrate does not overlap with the normal projection of the pixel opening area of the first color sub-pixel on the substrate.

[0017] The normal projection of the second layer of second charge generation layer on the substrate does not overlap with the normal projection of the pixel opening area of the first color sub-pixel on the substrate.

[0018] Optionally, among the at least two color sub-pixels, the third color sub-pixel comprises at least one layer of third light-emitting layer.

[0019] In the case where the third color sub-pixel comprises a number of third light-emitting layers less than the number of second light-emitting layers comprised by the second color sub-pixel, the normal projection of the second charge generation layer farthest from the substrate on the substrate does not overlap with the normal projection of the pixel opening area of the third color sub-pixel on the substrate.

[0020] Optionally, the third color sub-pixel comprises at least two layers of third light-emitting layers arranged in a stack; and the third color sub-pixel further comprises at least one layer of third charge generation layers, and there is one layer of the third charge generation layers between any two adjacent layers of the third light-emitting layers.

[0021] The third charge generation layer closest to the substrate is arranged in the same layer and of the same material as the second charge generation layer closest to the substrate.

[0022] The third charge generation layer closest to the substrate is independent of the second charge generation layer closest to the substrate; or the third charge generation layer closest to the substrate and the second charge generation layer closest to the substrate are formed as a common charge generation layer in an integrated structure.

[0023] Optionally, the third color sub-pixel comprises, arranged in a stack in a direction away from the substrate, a first layer of third light-emitting layers, a second layer of third light-emitting layers, and a third layer of third light-emitting layers; and the third color sub-pixel further comprises a first layer of third charge generation layers and a second layer of third charge generation layers, the first layer of third charge generation layers is located between the first layer of third light-emitting layers and the second layer of third light-emitting layers, and the second layer of third charge generation layers is located between the second layer of third light-emitting layers and the third layer of third light-emitting layers.

[0024] The first layer of third charge generation layers is independent of the first layer of second charge generation layers; or the first layer of third charge generation layers and the first layer of second charge generation layers are formed as a common charge generation layer in an integrated structure.

[0025] And / or,

[0026] The second layer of third charge generation layers is independent of the second layer of second charge generation layers; or the second layer of third charge generation layers and the second layer of second charge generation layers are formed as a common charge generation layer in an integrated structure.

[0027] Optionally, the third color sub-pixel comprises, arranged in a stack in a direction away from the substrate, a first layer of third light-emitting layers, a second layer of third light-emitting layers, and a third layer of third light-emitting layers; and the third color sub-pixel further comprises a first layer of third charge generation layers and a second layer of third charge generation layers, the first layer of third charge generation layers is located between the first layer of third light-emitting layers and the second layer of third light-emitting layers, and the second layer of third charge generation layers is located between the second layer of third light-emitting layers and the third layer of third light-emitting layers.

[0028] In the case where the first color sub-pixel comprises one layer of first light-emitting layers:

[0029] A normal projection of the first layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate.

[0030] A normal projection of the second layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate.

[0031] Optionally, among the at least two colors of sub-pixels, the third color sub-pixel comprises two layers of third light-emitting layers arranged in a stack; the third color sub-pixel further comprises a layer of third charge generation layer, which is located between the two layers of third light-emitting layers.

[0032] In the case where the first color sub-pixel comprises a layer of first light-emitting layer, a normal projection of the layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate.

[0033] Optionally, the second color sub-pixel comprises a blue sub-pixel, one of the first color sub-pixel and the third color sub-pixel comprises a red sub-pixel, and the other of the first color sub-pixel and the third color sub-pixel comprises a green sub-pixel.

[0034] Optionally, a plurality of the second color sub-pixels included in the display panel are divided into a plurality of columns of second sub-pixel columns, the plurality of columns of second sub-pixel columns are arranged along a first direction, each column of second sub-pixel column comprises a plurality of second color sub-pixels arranged along a second direction, and the first direction intersects the second direction.

[0035] Among the second color sub-pixels belonging to the same column of second sub-pixel columns, the second charge generation layers located at the same layer are formed as a common second charge generation layer in an integral structure.

[0036] Optionally, in the case where the number of third light-emitting layers included in the third color sub-pixel is equal to the number of first light-emitting layers included in the first color sub-pixel:

[0037] The display panel comprises a first power signal transmission layer of a first type and a first power signal transmission layer of a second type, the first power signal transmission layer of the first type and / or the first power signal transmission layer of the second type comprises a grid-like structure; the first color sub-pixel and the third color sub-pixel are respectively coupled with the first power signal transmission layer of the first type, and the second color sub-pixel is coupled with the first power signal transmission layer of the second type.

[0038] Optionally, in the case that the third light-emitting layer included in the third color sub-pixel is equal in number to the first light-emitting layer included in the first color sub-pixel:

[0039] The display panel includes a first power signal transmission layer and a second power signal transmission layer, the first power signal transmission layer and / or the second power signal transmission layer includes a grid structure; the first color sub-pixel is coupled to the first power signal transmission layer, and the second color sub-pixel and the third color sub-pixel are respectively coupled to the second power signal transmission layer.

[0040] Optionally, in the case that the third light-emitting layer included in the third color sub-pixel is equal in number to the second light-emitting layer included in the second color sub-pixel:

[0041] The display panel includes a first power signal transmission layer and a second power signal transmission layer, the first color sub-pixel and the third color sub-pixel are respectively coupled to the first power signal transmission layer, and the second color sub-pixel is coupled to the second power signal transmission layer.

[0042] Optionally, the first power signal transmission layer is formed into a comb structure, the first power signal transmission layer includes a first comb stem and a plurality of first comb teeth respectively coupled to the first comb stem; the second power signal transmission layer is formed into a comb structure, the second power signal transmission layer includes a second comb stem and a plurality of second comb teeth respectively coupled to the second comb stem; and the first comb teeth and the second comb teeth are alternately arranged along a first direction.

[0043] Optionally, in the case that the third light-emitting layer included in the third color sub-pixel is equal in number to the second light-emitting layer included in the second color sub-pixel:

[0044] The display panel includes a first power signal transmission layer and a second power signal transmission layer, the first color sub-pixel is coupled to the first power signal transmission layer, and the second color sub-pixel and the third color sub-pixel are respectively coupled to the second power signal transmission layer.

[0045] Optionally, the first power signal transmission layer is formed into a comb structure, the first power signal transmission layer includes a first comb stem and a plurality of first comb teeth respectively coupled to the first comb stem; the second power signal transmission layer is formed into a comb structure, the second power signal transmission layer includes a second comb stem and a plurality of second comb teeth respectively coupled to the second comb stem; and the first comb teeth and the second comb teeth are alternately arranged along a second direction.

[0046] The first comb teeth include a first comb tooth body part and a plurality of first comb tooth extension parts coupled with the first comb tooth body part respectively, and the first comb tooth extension parts are located at a first side of the first comb tooth body part along the second direction; the second comb teeth include a second comb tooth body part and a plurality of second comb tooth extension parts coupled with the second comb tooth body part respectively, and the second comb tooth extension parts are located at a second side of the second comb tooth body part along the second direction;

[0047] The plurality of first comb teeth and the plurality of second comb teeth are divided into a plurality of comb tooth groups, each comb tooth group includes one adjacent first comb tooth and one adjacent second comb tooth, and the first comb tooth extension parts and the second comb tooth extension parts in the same comb tooth group are arranged alternately along a first direction, and the first direction intersects the second direction.

[0048] Based on the technical scheme of the display panel, the utility model provides a kind of display device, comprising above-mentioned display panel.

[0049] In the technical scheme provided by the utility model, the second color sub-pixel includes at least two layers of second light-emitting layers arranged in layers and at least one second charge generation layer, and there is one second charge generation layer between two adjacent second light-emitting layers;Therefore, the technical scheme provided by the utility model includes a tandem light-emitting device formed by the second color sub-pixel, which ensures the display brightness and service life of the display panel.

[0050] Moreover, in the technical scheme provided by the utility model, the first color sub-pixel includes at least one first light-emitting layer, the number of second light-emitting layers is greater than the number of first light-emitting layers, the number of second charge generation layers is greater than the number of first charge generation layers included in the first color sub-pixel, and the orthographic projection of the second charge generation layer farthest from the substrate substrate on the substrate substrate does not overlap with the orthographic projection of the pixel opening area of the first color sub-pixel on the substrate substrate;This extra second charge generation layer avoids affecting the carriers required for the first color sub-pixel to emit light, ensuring the light-emitting effect of the first color sub-pixel, and thus ensuring the image quality performance of the display panel including the tandem light-emitting device.

[0051] In addition, in the technical scheme provided by the utility model, the first color sub-pixel includes at least one first light-emitting layer, and the number of second light-emitting layers is greater than the number of first light-emitting layers, so that not all sub-pixels in the display panel are sub-pixels including multiple light-emitting layers, avoiding the light-emitting efficiency of the sub-pixels in the display panel being too high, avoiding the sensitivity of the sub-pixels to the current size being too strong, and thus avoiding the problem of poor image quality performance of the display panel when displaying low gray scale pictures.

[0052] In addition, the technical scheme provided by the display panel has the first color sub-pixel including at least one first light-emitting layer, and the number of the second light-emitting layer is greater than the number of the first light-emitting layer, so that not all the sub-pixels in the display panel are sub-pixels including the same number of multi-layer light-emitting layers, thereby effectively reducing the manufacturing cost of the display panel. BRIEF DESCRIPTION OF DRAWINGS

[0053] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application. In the drawings:

[0054] Figure 1 A first cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0055] Figure 2 A second cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0056] Figure 3 A third cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0057] Figure 4 A fourth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0058] Figure 5 A fifth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0059] Figure 6 A sixth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0060] Figure 7 A seventh cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0061] Figure 8 An eighth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0062] Figure 9 A ninth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0063] Figure 10 A tenth cross-sectional schematic view of a display panel according to an embodiment of the present application;

[0064] Figure 11 A first layout schematic view of a pixel unit and a first power supply signal line in a display panel according to an embodiment of the present application;

[0065] Figure 12 A second layout diagram of pixel units and first power signal lines in a display panel provided for an embodiment of the present utility model;

[0066] Figure 13 A schematic diagram of the layout of pixel units and the second charge generation layer in a display panel provided for an embodiment of this utility model;

[0067] Figure 14 A schematic diagram showing the layout of pixel units, the second charge generation layer, and the third charge generation layer in a display panel provided in an embodiment of this utility model.

[0068] Figure 15 A first layout schematic diagram of pixel units and second power signal lines in a display panel provided for an embodiment of this utility model;

[0069] Figure 16 A second layout schematic diagram of pixel units and second power signal lines in a display panel provided for an embodiment of this utility model;

[0070] Figure 17 for Figure 16 Schematic diagram of the layout of the second power signal line;

[0071] Figure 18 for Figure 16 A schematic diagram of the layout of the second power signal line in the first layer;

[0072] Figure 19 for Figure 16 A schematic diagram of the layout of the second power signal line in the second layer. Detailed Implementation

[0073] To further illustrate the display panel and display device provided in the embodiments of this utility model, a detailed description is provided below with reference to the accompanying drawings.

[0074] Please see Figures 1 to 6 , Figures 9 to 11 This utility model provides a display panel, including: a substrate 10 and a plurality of light-emitting units 20 disposed on the substrate 10, wherein the light-emitting unit 20 includes sub-pixels of at least two colors;

[0075] In the at least two colors of sub-pixels, the first color sub-pixel 201 comprises at least one first light-emitting layer 201a, and the second color sub-pixel 202 comprises at least two second light-emitting layers 202a arranged in a stack, the number of the second light-emitting layers 202a being greater than the number of the first light-emitting layers 201a; the second color sub-pixel 202 further comprises at least one second charge generation layer 202b, and at least part of the second charge generation layer 202b farthest from the substrate 10 is located between the two second light-emitting layers 202a farthest from the substrate 10.

[0076] The orthogonal projection of the second charge generation layer 202b farthest from the substrate 10 on the substrate 10 does not overlap with the orthogonal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10.

[0077] It should be noted that the pixel opening area of the sub-pixel is defined by the pixel definition layer PDL, which is the effective light-emitting area of the sub-pixel.

[0078] It should be noted that, Figures 1 to 10 The anode layer Ano and the cathode layer Cath and the encapsulation layer TFE are also shown in FIG. 2. The cathode layer Cath can be a second power signal transmission layer, but is not limited thereto. The display panel further comprises a driving circuit layer between the substrate 10 and the anode layer Ano, which is not shown in the figure.

[0079] For example, the display panel comprises a plurality of light-emitting units 20 arranged in an array. For example, the light-emitting unit 20 comprises three color sub-pixels, i.e., red sub-pixels, green sub-pixels and blue sub-pixels.

[0080] For example, the light-emitting unit 20 adopts a Real RGB pixel arrangement, but is not limited thereto.

[0081] For example, the first light-emitting layer 201a comprises a first organic light-emitting material layer, and the second light-emitting layer 202a comprises a second organic light-emitting material layer.

[0082] For example, the first color sub-pixel 201 comprises at least one first light-emitting layer 201a. In the case where the first color sub-pixel 201 comprises one first light-emitting layer 201a, the first color sub-pixel 201 does not comprise a first charge generation layer 201b; in the case where the first color sub-pixel 201 comprises at least two first light-emitting layers 201a arranged in a stack, the first color sub-pixel 201 further comprises a first charge generation layer 201b, and each adjacent two first light-emitting layers 201a has one first charge generation layer 201b therebetween.

[0083] Exemplarily, the second color sub-pixel 202 includes at least two layers of second light-emitting layers 202a arranged in a stack, and at least one layer of second charge generation layers 202b, and each two adjacent layers of the second light-emitting layers 202a have one layer of the second charge generation layers 202b therebetween.

[0084] Exemplarily, the number of the second light-emitting layers 202a is greater than the number of the first light-emitting layers 201a, and the number of the second charge generation layers 202b is greater than the number of the first charge generation layers 201b, and the normal projection of the second charge generation layer 202b that is additionally included in the second color sub-pixel 202 relative to the first color sub-pixel 201 on the substrate 10 does not overlap with the normal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10.

[0085] Exemplarily, the second charge generation layer 202b that is additionally included in the second color sub-pixel 202 relative to the first color sub-pixel 201 includes the second charge generation layer 202b farthest from the substrate 10, and at least part of the second charge generation layer 202b farthest from the substrate 10 is located between two second light-emitting layers 202a farthest from the substrate 10, and the normal projection of the second charge generation layer 202b farthest from the substrate 10 on the substrate 10 does not overlap with the normal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10.

[0086] According to the specific structure of the display panel, in the display panel provided in the embodiment of the present application, the second color sub-pixel 202 includes at least two layers of second light-emitting layers 202a arranged in a stack and at least one layer of second charge generation layers 202b, and each two adjacent layers of the second light-emitting layers 202a have one layer of the second charge generation layers 202b therebetween, so that the display panel provided in the embodiment of the present application includes the Tandem light-emitting device formed by the second color sub-pixel 202, and the display brightness and the service life of the display panel are ensured.

[0087] Moreover, the display panel provided by the embodiment of the present application sets the first color sub-pixel 201 to include at least one first light-emitting layer 201a, and the number of the second light-emitting layer 202a is greater than the number of the first light-emitting layer 201a, that is, the number of the second charge generation layer 202b is greater than the number of the first charge generation layer 201b included in the first color sub-pixel 201, and the normal projection of the second charge generation layer 202b (that is, the second charge generation layer 202b in the second color sub-pixel 202 which is more than the first color sub-pixel 201) farthest from the substrate 10 on the substrate 10 does not overlap with the normal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10, thereby avoiding the influence of the extra second charge generation layer 202b on the carriers (including electrons and holes) required for the light-emitting of the first color sub-pixel 201, ensuring the light-emitting effect of the first color sub-pixel 201, and thus ensuring the picture quality performance of the display panel including the series light-emitting device (that is, the second color sub-pixel 202).

[0088] In addition, the display panel provided by the embodiment of the present application sets the first color sub-pixel 201 to include at least one first light-emitting layer 201a, and the number of the second light-emitting layer 202a is greater than the number of the first light-emitting layer 201a, so that the sub-pixels in the display panel are not all sub-pixels including multiple light-emitting layers, thereby avoiding the light-emitting efficiency of the sub-pixels in the display panel being too high, avoiding the sensitivity of the sub-pixels to the current being too strong, and thus avoiding the problem that the display panel has poor picture quality performance when displaying a low gray scale picture.

[0089] In addition, the display panel provided by the embodiment of the present application sets the first color sub-pixel 201 to include at least one first light-emitting layer 201a, and the number of the second light-emitting layer 202a is greater than the number of the first light-emitting layer 201a, so that the sub-pixels in the display panel are not all sub-pixels including multiple light-emitting layers, thereby avoiding the light-emitting efficiency of the sub-pixels in the display panel being too high, avoiding the sensitivity of the sub-pixels to the current being too strong, and thus avoiding the problem that the display panel has poor picture quality performance when displaying a low gray scale picture.

[0090] As shown in FIG. Figures 1 to 3 As shown in FIG.

[0091] For example, when the first color sub-pixel 201 includes one first light-emitting layer 201a and the second color sub-pixel 202 includes at least two stacked second light-emitting layers 202a, the light-emitting unit 20 is formed as a hybrid device structure, that is, a hybrid device structure including a single device + tandem device, or a single device + multilayer device.

[0092] For example, the second charge generation layer 202b mentioned above, which is the second charge generation layer 202b in the second color sub-pixel 202 that is additional to the first color sub-pixel 201, has a projection on the substrate 10 that does not overlap with the projection of the pixel opening area of ​​the first color sub-pixel 201 on the substrate 10.

[0093] The above configuration avoids the additional second charge generation layer 202b from affecting the charge carriers required for the first color sub-pixel 201 to emit light, thus ensuring the emitting effect of the first color sub-pixel 201 and thereby ensuring the image quality performance of the display panel including the series light-emitting devices.

[0094] like Figure 5 , Figure 6 , Figure 9 and Figure 10 As shown, in some embodiments, the first color sub-pixel 201 includes two stacked first light-emitting layers 201a and a first charge-generating layer 201b located between the two first light-emitting layers 201a.

[0095] The second color sub-pixel 202 includes a first second light-emitting layer 202a, a second second light-emitting layer 202a, and a third second light-emitting layer 202a stacked sequentially along a direction away from the substrate 10. It also includes a first second charge-generating layer 202b and a second second charge-generating layer 202b. The first second charge-generating layer 202b is located between the first second light-emitting layer 202a and the second second light-emitting layer 202a, and the second second charge-generating layer 202b is located between the second second light-emitting layer 202a and the third second light-emitting layer 202a.

[0096] The orthographic projection of the second charge generation layer 202b on the substrate 10 does not overlap with the orthographic projection of the pixel opening area of ​​the first color sub-pixel 201 on the substrate 10.

[0097] For example, the second charge generation layer 202b is the second charge generation layer 202b that is additional to the second color sub-pixel 202 compared to the first color sub-pixel 201.

[0098] Exemplarily, the first charge generation layer 201b is arranged in the same layer and material as the first layer second charge generation layer 202b; the first charge generation layer 201b and the first layer second charge generation layer 202b are independent of each other; or the first charge generation layer 201b and the first layer second charge generation layer 202b form a common charge generation layer in an integrated structure.

[0099] Exemplarily, in the case where the first charge generation layer 201b and the first layer second charge generation layer 202b form a common charge generation layer in an integrated structure, the common charge generation layer can include a hollow area Q1 located above the pixel definition layer PDL between the first color sub-pixel 201 and the second color sub-pixel 202.

[0100] The above arrangement avoids the second charge generation layer 202b affecting the carriers required for the first color sub-pixel 201 to emit light, ensuring the light emitting effect of the first color sub-pixel 201, and thus ensuring the display quality of the display panel including the serial light emitting device.

[0101] As shown in FIG. 1, in some embodiments, the first color sub-pixel 201 includes a layer of the first light emitting layer 201a; Figure 4

[0102] The second color sub-pixel 202 includes a first layer second light emitting layer 202a, a second layer second light emitting layer 202a and a third layer second light emitting layer 202a arranged in sequence in the direction away from the substrate 10, and further includes a first layer second charge generation layer 202b and a second layer second charge generation layer 202b, the first layer second charge generation layer 202b is located between the first layer second light emitting layer 202a and the second layer second light emitting layer 202a, and the second layer second charge generation layer 202b is located between the second layer second light emitting layer 202a and the third layer second light emitting layer 202a;

[0103] The orthogonal projection of the first layer second charge generation layer 202b on the substrate 10 does not overlap with the orthogonal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10;

[0104] The orthogonal projection of the second layer second charge generation layer 202b on the substrate 10 does not overlap with the orthogonal projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10.

[0105] ​For example, the first layer of the second charge generation layer 202b and the second layer of the second charge generation layer 202b in the second color sub-pixel 202 are the second charge generation layers 202b that are additionally provided relative to the first color sub-pixel 201.

[0106] The above arrangement avoids the additional second charge generation layer 202b from affecting the carriers required for the first color sub-pixel 201 to emit light, thereby ensuring the light emitting effect of the first color sub-pixel 201 and the display quality of the display panel including the tandem light emitting device.

[0107] For example, the first layer of the second charge generation layer 202b and the second layer of the second charge generation layer 202b in the second color sub-pixel 202 are the second charge generation layers 202b that are additionally provided relative to the third color sub-pixel 203. Figure 1 Figures 4 to 6 In some embodiments, among the at least two colors of sub-pixels, the third color sub-pixel 203 includes at least one third light emitting layer 203a.

[0108] In the case where the number of the third light emitting layer 203a included in the third color sub-pixel 203 is less than the number of the second light emitting layer 202a included in the second color sub-pixel 202, the orthographic projection of the second charge generation layer 202b farthest from the substrate 10 on the substrate 10 does not overlap with the orthographic projection of the pixel opening region of the third color sub-pixel 203 on the substrate 10.

[0109] For example, in the case where the number of the third light emitting layer 203a included in the third color sub-pixel 203 is less than the number of the second light emitting layer 202a included in the second color sub-pixel 202, the second charge generation layer 202b farthest from the substrate 10 in the second color sub-pixel 202 is the second charge generation layer 202b that is additionally provided relative to the third color sub-pixel 203.

[0110] The above arrangement avoids the additional second charge generation layer 202b from affecting the carriers required for the third color sub-pixel 203 to emit light, thereby ensuring the light emitting effect of the third color sub-pixel 203 and the display quality of the display panel including the tandem light emitting device.

[0111] Figure 2 For example, the first layer of the second charge generation layer 202b and the second layer of the second charge generation layer 202b in the second color sub-pixel 202 are the second charge generation layers 202b that are additionally provided relative to the third color sub-pixel 203. Figure 3 Figures 5 to 10 As shown in FIG. 1, in some embodiments, among the at least two colors of sub-pixels, the third color sub-pixel 203 includes at least two layers of third light emitting layers 203a arranged in a stack; the third color sub-pixel 203 further includes at least one third charge generation layer 203b, and there is one third charge generation layer 203b between any two adjacent layers of the third light emitting layers 203a.

[0112] ​​The third charge generation layer 203b closest to the substrate 10 is disposed in the same layer and made of the same material as the second charge generation layer 202b closest to the substrate 10.

[0113] The third charge generation layer 203b closest to the substrate 10 and the second charge generation layer 202b closest to the substrate 10 are independent of each other; or, the third charge generation layer 203b closest to the substrate 10 and the second charge generation layer 202b closest to the substrate 10 are formed into a common charge generation layer with an integral structure.

[0114] For example, in the case where the third charge generation layer 203b closest to the substrate 10 and the second charge generation layer 202b closest to the substrate 10 are formed as a common charge generation layer, the common charge generation layer may include a cutout area Q1, which is located above the pixel delimiting layer PDL between the third color sub-pixel 203 and the second color sub-pixel 202.

[0115] The aforementioned arrangement of the third charge generation layer 203b closest to the substrate 10 and the second charge generation layer 202b closest to the substrate 10 being disposed in the same layer and made of the same material allows the third charge generation layer 203b closest to the substrate 10 and the second charge generation layer 202b closest to the substrate 10 to be formed simultaneously in the same patterning process. This simplifies the manufacturing process of the display panel, reduces BOM (Bill of Materials) costs, and improves the manufacturing yield.

[0116] like Figure 9 and Figure 10 As shown, in some embodiments, the third color sub-pixel 203 includes a first third light-emitting layer 203a, a second third light-emitting layer 203a, and a third third light-emitting layer 203a stacked sequentially along a direction away from the substrate 10, and also includes a first third charge-generating layer 203b and a second third charge-generating layer 203b, wherein the first third charge-generating layer 203b is located between the first third light-emitting layer 203a and the second third light-emitting layer 203a, and the second third charge-generating layer 203b is located between the second third light-emitting layer 203a and the third third light-emitting layer 203a;

[0117] The first third charge generation layer 203b and the first second charge generation layer 202b are independent of each other; or, the first third charge generation layer 203b and the first second charge generation layer 202b form a common charge generation layer with an integral structure.

[0118] And / or,

[0119] The second third charge generation layer 203b and the second second charge generation layer 202b are independent of each other; or, the second third charge generation layer 203b and the second second charge generation layer 202b form a common charge generation layer with an integral structure.

[0120] For example, in the case where the first third charge generation layer 203b and the first second charge generation layer 202b form a common charge generation layer with an integral structure, the common charge generation layer may include a cutout area Q1, which is located above the pixel delimiting layer PDL between the third color sub-pixel 203 and the second color sub-pixel 202.

[0121] For example, in the case where the second third charge generation layer 203b and the second second charge generation layer 202b are formed as a common charge generation layer, the common charge generation layer may include a cutout area Q1, which is located above the pixel delimiting layer PDL between the third color sub-pixel 203 and the second color sub-pixel 202.

[0122] The above configuration allows the first third charge generation layer 203b and the first second charge generation layer 202b to be formed simultaneously in the same patterning process, which helps to simplify the manufacturing process of the display panel.

[0123] The above configuration allows the second third charge generation layer 203b and the second second charge generation layer 202b to be formed simultaneously in the same patterning process, which helps to simplify the manufacturing process of the display panel.

[0124] like Figure 9 and Figure 10 As shown, in some embodiments, the third color sub-pixel 203 includes a first third light-emitting layer 203a, a second third light-emitting layer 203a, and a third third light-emitting layer 203a stacked sequentially along a direction away from the substrate 10, and also includes a first third charge-generating layer 203b and a second third charge-generating layer 203b, wherein the first third charge-generating layer 203b is located between the first third light-emitting layer 203a and the second third light-emitting layer 203a, and the second third charge-generating layer 203b is located between the second third light-emitting layer 203a and the third third light-emitting layer 203a;

[0125] In the case where the first color sub-pixel 201 includes a first light-emitting layer 201a:

[0126] The orthographic projection of the first third charge generation layer 203b on the substrate 10 does not overlap with the orthographic projection of the pixel opening area of ​​the first color sub-pixel 201 on the substrate 10.

[0127] The orthographic projection of the second third charge generation layer 203b on the substrate 10 does not overlap with the orthographic projection of the pixel opening area of ​​the first color sub-pixel 201 on the substrate 10.

[0128] For example, when the first color sub-pixel 201 includes a first light-emitting layer 201a, the first third charge generation layer 203b and the second third charge generation layer 203b are the additional third charge generation layer 203b in the third color sub-pixel 203 relative to the first color sub-pixel 201.

[0129] The above configuration avoids the additional third charge generation layer 203b from affecting the charge carriers required for the first color sub-pixel 201 to emit light, thus ensuring the emitting effect of the first color sub-pixel 201 and thereby ensuring the image quality performance of the display panel including the series light-emitting devices.

[0130] like Figure 2 , Figure 3 , Figures 5 to 8 As shown, in some embodiments, among the sub-pixels of at least two colors, the third color sub-pixel 203 includes two stacked third light-emitting layers 203a; the third color sub-pixel 203 also includes a third charge-generating layer 203b, which is located between the two third light-emitting layers 203a.

[0131] When the first color sub-pixel 201 includes a first light-emitting layer 201a, the orthographic projection of the third charge-generating layer 203b on the substrate 10 does not overlap with the orthographic projection of the pixel opening region of the first color sub-pixel 201 on the substrate 10.

[0132] For example, when the first color sub-pixel 201 includes a first light-emitting layer 201a, the third charge-generating layer 203b is the additional third charge-generating layer 203b in the third color sub-pixel 203 compared to the first color sub-pixel 201.

[0133] The above configuration avoids the additional third charge generation layer 203b from affecting the charge carriers required for the first color sub-pixel 201 to emit light, thus ensuring the emitting effect of the first color sub-pixel 201 and thereby ensuring the image quality performance of the display panel including the series light-emitting devices.

[0134] In some embodiments, the second color sub-pixel 202 includes a blue sub-pixel, one of the first color sub-pixel 201 and the third color sub-pixel 203 includes a red sub-pixel, and the other of the first color sub-pixel 201 and the third color sub-pixel 203 includes a green sub-pixel.

[0135] It should be noted that among the red, green, and blue sub-pixels, the blue sub-pixel has the shortest lifespan. Therefore, the above-mentioned setting of the second color sub-pixel 202 includes the blue sub-pixel, such that the blue sub-pixel includes at least two stacked second light-emitting layers 202a, thereby effectively improving the lifespan of the blue sub-pixel.

[0136] Since the green subpixel is the pixel with the greatest brightness sharing in the display panel, setting the green subpixel to include at least two stacked light-emitting layers is beneficial to improving the display brightness of the display panel.

[0137] In the display panel provided in the above embodiments, the number of light-emitting layers included in sub-pixels of various colors can be adaptively adjusted to meet actual needs.

[0138] The display panel provided in the above embodiments adopts a hybrid device structure. Compared with setting all sub-pixels to be tandem device structures, it effectively reduces the BOM cost and FMM mask number related to some sub-pixels, while also reducing the complexity of the process, improving the production capacity and yield of the display panel, and greatly reducing the cost of the display panel.

[0139] like Figure 13 As shown, in some embodiments, the multiple second color sub-pixels 202 included in the display panel are divided into multiple columns of second sub-pixels, the multiple columns of second sub-pixels are arranged along a first direction, and each column of second sub-pixels includes multiple second color sub-pixels 202 arranged along a second direction, the first direction intersecting the second direction;

[0140] In each of the second color sub-pixels 202 belonging to the same column of second sub-pixels, the second charge generation layer 202b located in the same layer forms a common second charge generation layer 202b with an integral structure.

[0141] Exemplarily, in a case that the pixel arrangement mode of the light emitting unit 20 adopts Real RGB, the plurality of first color sub-pixels 201 and the plurality of third color sub-pixels 203 included in the display panel are divided into a plurality of first sub-pixel columns arranged along a first direction, and each of the first sub-pixel columns includes the first color sub-pixels 201 and the third color sub-pixels 203 arranged alternately along a second direction. The plurality of second color sub-pixels 202 included in the display panel are divided into a plurality of second sub-pixel columns arranged along the first direction, and the first sub-pixel columns and the second sub-pixel columns are arranged alternately along the first direction.

[0142] Exemplarily, the first direction includes a horizontal direction, and the second direction includes a vertical direction, but is not limited thereto.

[0143] Exemplarily, the common second charge generation layer 202b formed by the second charge generation layers 202b located at the same layer includes a hollow area Q1 located on a pixel definition layer PDL between adjacent second color sub-pixels 202.

[0144] In a case that the first color sub-pixel 201 and the third color sub-pixel 203 each include a single-layer light emitting layer, the first color sub-pixel 201 and the third color sub-pixel 203 each do not include a charge generation layer. In a case that the second color sub-pixel 202 includes at least two layers of second light emitting layers 202a, one of the adjacent second light emitting layers 202a has a second charge generation layer 202b, the second charge generation layer 202b is used to generate carriers (such as electrons and holes).

[0145] In the above arrangement, the second charge generation layers 202b located at the same layer of each of the second color sub-pixels 202 belonging to the same second sub-pixel column are formed as a common second charge generation layer 202b in an integrated structure, so that when the common second charge generation layer 202b is manufactured, only one mask needs to be replaced, i.e., an Open mask originally used is replaced by an FMM mask, and the common second charge generation layer 202b is formed by using the FMM mask, without the need to increase an additional process flow.

[0146] As Figure 14In some embodiments, the first color sub-pixels 201 and the third color sub-pixels 203 included in the display panel are divided into a plurality of first sub-pixel columns arranged along a first direction, each first sub-pixel column including the first color sub-pixels 201 and the third color sub-pixels 203 arranged alternately along a second direction. The second color sub-pixels 202 included in the display panel are divided into a plurality of second sub-pixel columns arranged along the first direction, the first sub-pixel columns and the second sub-pixel columns being arranged alternately along the first direction.

[0147] The third color sub-pixels 203 are divided into a plurality of third sub-pixel rows arranged along the second direction, each third sub-pixel row including a plurality of third color sub-pixels 203 arranged along the first direction.

[0148] When the third color sub-pixels 203 include at least two layers of third light-emitting layers 203a, the second charge generation layer 202b and the third charge generation layer 203b in the second color sub-pixels 202 and the third color sub-pixels 203 are formed as a common charge generation layer in an integral structure.

[0149] For example, when the first color sub-pixels 201 include a single layer of first light-emitting layers 201a, the first color sub-pixels 201 do not include a charge generation layer. When the second color sub-pixels 202 include at least two layers of second light-emitting layers 202a, one of the adjacent second light-emitting layers 202a includes a second charge generation layer 202b for generating carriers. When the third color sub-pixels 203 include at least two layers of third light-emitting layers 203a, one of the adjacent third light-emitting layers 203a includes a third charge generation layer 203b for generating carriers.

[0150] The above arrangement allows one mask to be replaced when the common charge generation layer is manufactured, i.e., replacing an Open mask with an FMM mask. One of the second charge generation layer 202b and the third charge generation layer 203b can be formed by using the replaced FMM mask. One additional FMM mask is needed, and the other one of the second charge generation layer 202b and the third charge generation layer 203b can be formed by using the additional FMM mask.

[0151] For example, when the first color sub-pixels 201 include a single layer of first light-emitting layers 201a, the first color sub-pixels 201 do not include a charge generation layer. When the second color sub-pixels 202 include at least two layers of second light-emitting layers 202a, one of the adjacent second light-emitting layers 202a includes a second charge generation layer 202b for generating carriers. When the third color sub-pixels 203 include at least two layers of third light-emitting layers 203a, one of the adjacent third light-emitting layers 203a includes a third charge generation layer 203b for generating carriers. Figure 11As shown, in some embodiments, when the number of third light-emitting layers 203a included in the third color sub-pixel 203 is equal to the number of first light-emitting layers 201a included in the first color sub-pixel 201:

[0152] The display panel includes a first power signal transmission layer 31 and a second power signal transmission layer 32, wherein the first power signal transmission layer 31 and / or the second power signal transmission layer 32 include a mesh structure; the first color sub-pixel 201 and the third color sub-pixel 203 are respectively coupled to the first power signal transmission layer 31, and the second color sub-pixel 202 is coupled to the second power signal transmission layer 32.

[0153] For example, both the first type of first power signal transmission layer 31 and the second type of first power signal transmission layer 32 are used to transmit VDD signals. The voltage value of the first power signal transmitted by the first type of first power signal transmission layer 31 is the same as or different from the voltage value of the first power signal transmitted by the second type of first power signal transmission layer 32.

[0154] It should be noted that in the design of the VDD signal in the relevant technology, only one first power signal transmission layer is set up. The first power signal with a fixed voltage value is transmitted through this first power signal transmission layer. This will cause the voltage across the Tandem device to be higher than that across the Single device, which will eventually lead to a certain specification over-voltage of the Single device, increasing the power consumption and temperature rise of the display panel.

[0155] The above configuration involves coupling the first color sub-pixel 201 and the third color sub-pixel 203 to the first power signal transmission layer 31, and coupling the second color sub-pixel 202 to the second power signal transmission layer 32. This allows the display panel to adopt a separate power signal transmission layer design, meaning that the first power signal received by the second color sub-pixel 202 can be independently controlled, along with the first power signals received by the first color sub-pixel 201 and the third color sub-pixel 203. This design can adaptively adjust the voltage values ​​of the first power signals received by different color sub-pixels, thereby reducing the voltage across the devices of various sub-pixels, including those with different numbers of light-emitting layers, and achieving the goals of reducing power consumption and temperature rise.

[0156] like Figure 12 As shown, in some embodiments, when the number of third light-emitting layers 203a included in the third color sub-pixel 203 is equal to the number of second light-emitting layers 202a included in the second color sub-pixel 202:

[0157] The display panel includes a first power signal transmission layer 31 and a second power signal transmission layer 32, wherein the first power signal transmission layer 31 and / or the second power signal transmission layer 32 include a mesh structure; the first color sub-pixel 201 is coupled to the first power signal transmission layer 31, and the second color sub-pixel 202 and the third color sub-pixel 203 are respectively coupled to the second power signal transmission layer 32.

[0158] The above configuration couples the first color sub-pixel 201 to the first power signal transmission layer 31, and the second color sub-pixel 202 and the third color sub-pixel 203 to the second power signal transmission layer 32, respectively. This allows the display panel to adopt a separate power signal transmission layer design, meaning that the first power signal received by the first color sub-pixel 201 can be independently controlled, as can the first power signals received by the second color sub-pixel 202 and the third color sub-pixel 203. This design can adaptively adjust the voltage values ​​of the first power signals received by different color sub-pixels, thereby reducing the voltage across the devices of various sub-pixels, including different numbers of light-emitting layers, and achieving the purpose of reducing power consumption and temperature rise.

[0159] like Figure 15 As shown, in some embodiments, when the number of third light-emitting layers 203a included in the third color sub-pixel 203 is equal to the number of first light-emitting layers 201a included in the first color sub-pixel 201:

[0160] The display panel includes a first second power signal transmission layer 41 and a second second power signal transmission layer 42. The first color sub-pixel 201 and the third color sub-pixel 203 are respectively coupled to the first second power signal transmission layer 41, and the second color sub-pixel 202 is coupled to the second second power signal transmission layer 42.

[0161] For example, both the first type of second power signal transmission layer 41 and the second type of second power signal transmission layer 42 are used to transmit VSS signals. The voltage value of the second power signal transmitted by the first type of second power signal transmission layer 41 is the same as or different from the voltage value of the second power signal transmitted by the second type of second power signal transmission layer 42.

[0162] Exemplarily, the first second power signal transmission layer 41 is formed in a comb structure, and includes a first comb stem 411 and a plurality of first comb teeth 412 coupled to the first comb stem 411 respectively; the second second power signal transmission layer 42 is formed in a comb structure, and includes a second comb stem 421 and a plurality of second comb teeth 422 coupled to the second comb stem 421 respectively; the first comb teeth 412 and the second comb teeth 422 are arranged alternately in a first direction.

[0163] It should be noted that in the related art, when designing a VSS signal, only one layer of second power signal transmission layer is provided, and the second power signal with a fixed voltage value is transmitted through the one layer of second power signal transmission layer, which can cause the cross voltage of the Tandem device to be higher than that of the Single device, and finally cause the cross voltage of the Single device to have a certain specification overflow, thereby increasing the power consumption and temperature rise of the display panel.

[0164] The first color sub-pixel 201 and the third color sub-pixel 203 are coupled to the first second power signal transmission layer 41, and the second color sub-pixel 202 is coupled to the second second power signal transmission layer 42, so that the display panel adopts a second power signal transmission layer separation design, that is, the second power signal received by the second color sub-pixel 202 can be independently controlled from the second power signals received by the first color sub-pixel 201 and the third color sub-pixel 203. This design can adaptively adjust the voltage values of the second power signals received by different color sub-pixels, thereby reducing the device cross voltage of each type of sub-pixel including different numbers of light-emitting layers, and achieving the purposes of reducing power consumption and temperature rise.

[0165] It should be noted that the above scheme needs to increase a mask when manufacturing the second power signal transmission layer, but has little effect on the cost.

[0166] In addition, the first second power signal transmission layer 41 and the second second power signal transmission layer 42 are arranged in the above structure, which effectively reduces the resistance of the first second power signal transmission layer 41 and the second second power signal transmission layer 42, thereby further achieving the effect of reducing the cross voltage.

[0167] As shown in FIG. 3, in some embodiments, when the number of the third light-emitting layers 203a included in the third color sub-pixel 203 is equal to the number of the second light-emitting layers 202a included in the second color sub-pixel 202, the first second power signal transmission layer 41 and the second second power signal transmission layer 42 are arranged in a comb structure, and the first comb teeth 412 of the first second power signal transmission layer 41 and the second comb teeth 422 of the second second power signal transmission layer 42 are arranged alternately in a first direction. Figures 16 to 19

[0168] ​The display panel comprises a first second power signal transmission layer 41 and a second second power signal transmission layer 42, the first color sub-pixel 201 is coupled with the first second power signal transmission layer 41, and the second color sub-pixel 202 and the third color sub-pixel 203 are respectively coupled with the second second power signal transmission layer 42.

[0169] For example, the first second power signal transmission layer 41 is formed into a comb structure, the first second power signal transmission layer 41 comprises a first comb handle 411 and a plurality of first comb teeth 412 coupled with the first comb handle 411 respectively; the second second power signal transmission layer 42 is formed into a comb structure, the second second power signal transmission layer 42 comprises a second comb handle 421 and a plurality of second comb teeth 422 coupled with the second comb handle 421 respectively; the first comb teeth 412 and the second comb teeth 422 are alternately arranged along a second direction;

[0170] The first comb teeth 412 comprise a first comb tooth main body part 412a and a plurality of first comb tooth extension parts 412b coupled with the first comb tooth main body part 412a respectively, along the second direction, the first comb tooth extension part 412b is located at a first side of the first comb tooth main body part 412a; the second comb teeth 422 comprise a second comb tooth main body part 422a and a plurality of second comb tooth extension parts 422b coupled with the second comb tooth main body part 422a respectively, along the second direction, the second comb tooth extension part 422b is located at a second side of the second comb tooth main body part 422a;

[0171] The plurality of first comb teeth 412 and the plurality of second comb teeth 422 are divided into a plurality of comb tooth groups Z1, each comb tooth group Z1 comprises one first comb tooth 412 and one second comb tooth 422 adjacent to each other, in the same comb tooth group Z1, the first comb tooth extension part 412b and the second comb tooth extension part 422b are alternately arranged along a first direction, and the first direction intersects with the second direction.

[0172] The above-mentioned arrangement that the first color sub-pixel 201 is coupled with the first second power signal transmission layer 41, and the second color sub-pixel 202 and the third color sub-pixel 203 are respectively coupled with the second second power signal transmission layer 42; makes the display panel adopt a second power signal transmission layer separation type design, that is, the second power signal received by the first color sub-pixel 201 can be independently controlled from the second power signal received by the second color sub-pixel 202 and the third color sub-pixel 203, this design can adaptively adjust the voltage value of the second power signal received by different color sub-pixels, thereby reducing the device cross voltage of various sub-pixels comprising different numbers of light-emitting layers, achieving the purpose of reducing power consumption and temperature rise.

[0173] In addition, the first second power signal transmission layer 41 and the second second power signal transmission layer 42 are arranged in the above structure, so that the resistance of the first second power signal transmission layer 41 and the second second power signal transmission layer 42 is effectively reduced, thereby further achieving the effect of reducing the cross voltage.

[0174] The display device provided by the embodiment of the present application also includes the display panel provided by the above embodiment.

[0175] It should be noted that the display device can be any product or component with a display function, such as a television, a display, a digital photo frame, a mobile phone, a tablet computer, etc., wherein the display device further includes a flexible circuit board, a printed circuit board, a back plate, etc.

[0176] The display panel provided by the above embodiment includes a second color sub-pixel 202, the second color sub-pixel 202 includes at least two layers of second light-emitting layers 202a arranged in a stack and at least one layer of second charge generation layers 202b, and there is one layer of the second charge generation layers 202b between two adjacent layers of the second light-emitting layers 202a; therefore, the display panel provided by the above embodiment includes a tandem light-emitting device formed by the second color sub-pixel 202, which ensures the display brightness and the service life of the display panel.

[0177] In addition, the display panel provided by the above embodiment includes the first color sub-pixel 201 including at least one layer of first light-emitting layers 201a, the number of the second light-emitting layers 202a is greater than the number of the first light-emitting layers 201a, the number of the second charge generation layers 202b is greater than the number of the first charge generation layers 201b included in the first color sub-pixel 201, and the orthographic projection of the second charge generation layer 202b farthest from the substrate 10 (i.e., the second charge generation layer 202b in the second color sub-pixel 202 that is added relative to the first color sub-pixel 201) on the substrate 10 does not overlap with the orthographic projection of the pixel opening area of the first color sub-pixel 201 on the substrate 10; this avoids affecting the carriers (including electrons and holes) required for the first color sub-pixel 201 to emit light by the additional second charge generation layer 202b, ensures the light-emitting effect of the first color sub-pixel 201, and thus ensures the image quality performance of the display panel including the tandem light-emitting device (i.e., the second color sub-pixel 202).

[0178] In addition, the display panel provided by the embodiment includes the first color sub-pixel 201 including at least one first light-emitting layer 201a, and the number of the second light-emitting layer 202a is greater than that of the first light-emitting layer 201a, so that not all the sub-pixels in the display panel include the same number of multi-layer light-emitting layers, thereby effectively reducing the manufacturing cost of the display panel.

[0179] In addition, the display panel provided by the embodiment includes the first color sub-pixel 201 including at least one first light-emitting layer 201a, and the number of the second light-emitting layer 202a is greater than that of the first light-emitting layer 201a, so that not all the sub-pixels in the display panel include the same number of multi-layer light-emitting layers, thereby effectively reducing the manufacturing cost of the display panel.

[0180] The display device provided by the embodiment of the utility model has the beneficial effects of the display panel, and details are not repeated here.

[0181] It should be noted that the signal line extending in a certain direction means that the signal line includes a main part and a secondary part connected to the main part, the main part is a line, a line segment or a strip-shaped body, the main part extends in a certain direction, and the length of the main part extending in a certain direction is greater than the length of the secondary part extending in other directions.

[0182] It should be noted that the "same layer" of the embodiment of the utility model can refer to a film layer on the same structure layer. Alternatively, for example, the film layer on the same layer can be a layer structure formed by patterning a film layer used to form a specific pattern using the same film forming process and then using the same mask plate through a one-time patterning process. According to different specific patterns, the one-time patterning process can include multiple exposure, development or etching processes, and the specific patterns in the formed layer structure can be continuous or discontinuous. These specific patterns can also be at different heights or have different thicknesses.

[0183] In the method embodiments of the utility model, the serial numbers of the steps cannot be used to limit the sequence of the steps, and for those skilled in the art, the changes in the sequence of the steps without creative labor are also within the protection scope of the utility model.

[0184] It should be noted that each of the embodiments in the present specification is described in a progressive manner, and the same or similar parts between each embodiment can be mutually referred to, and each embodiment focuses on the difference from other embodiments. In particular, for the method embodiments, since they are basically similar to the product embodiments, they are described more simply, and the relevant parts can be referred to the part of the description of the product embodiments.

[0185] Unless otherwise defined, technical terms or scientific terms used in the present disclosure shall have the ordinary meaning as understood by a person of ordinary skill in the art to which the present disclosure belongs. The terms "first", "second", and similar terms used in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms "include", "contain", and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects. The terms "connect", "couple", or "link" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly. It can be understood that when an element such as a layer, a film, a region, or a substrate is referred to as being "on" or "under" another element, the element can be "directly" on or under the other element, or there can be an intermediate element. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any one or more embodiments or examples in a suitable manner. The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate and a plurality of light-emitting units arranged on the substrate, the light-emitting units comprising sub-pixels of at least two colors; in the sub-pixels of the at least two colors, a first color sub-pixel comprises at least one first light-emitting layer, and a second color sub-pixel comprises at least two second light-emitting layers arranged in a stack, the number of the second light-emitting layers being greater than the number of the first light-emitting layers; the second color sub-pixel further comprises at least one second charge generation layer, at least part of the second charge generation layer farthest from the substrate being located between the two second light-emitting layers farthest from the substrate; a projection of the second charge generation layer farthest from the substrate on the substrate does not overlap with a projection of a pixel opening region of the first color sub-pixel on the substrate.

2. The display panel of claim 1, wherein, The first color sub-pixel comprises one first light-emitting layer, and the second color sub-pixel comprises two second light-emitting layers arranged in a stack, the second color sub-pixel further comprising one second charge generation layer, at least part of the second charge generation layer being located between the two second light-emitting layers.

3. The display panel of claim 1, wherein the first color sub-pixel comprises two first light-emitting layers arranged in a stack, and one first charge generation layer located between the two first light-emitting layers; the second color sub-pixel comprises a first second light-emitting layer, a second second light-emitting layer, and a third second light-emitting layer arranged in a stack in a direction away from the substrate, and further comprises a first second charge generation layer and a second second charge generation layer, the first second charge generation layer being located between the first second light-emitting layer and the second second light-emitting layer, and the second second charge generation layer being located between the second second light-emitting layer and the third second light-emitting layer; a projection of the second second charge generation layer on the substrate does not overlap with a projection of a pixel opening region of the first color sub-pixel on the substrate.

4. The display panel of claim 3, wherein the first charge generation layer and the first second charge generation layer are arranged in a same layer and are of a same material; the first charge generation layer and the first second charge generation layer are independent of each other; or the first charge generation layer and the first second charge generation layer form a common charge generation layer in an integrated structure.

5. The display panel of claim 1, wherein the first color sub-pixel comprises one first light-emitting layer; the second color sub-pixel comprises a first second light-emitting layer, a second second light-emitting layer, and a third second light-emitting layer arranged in a stack in a direction away from the substrate, and further comprises a first second charge generation layer and a second second charge generation layer, the first second charge generation layer being located between the first second light-emitting layer and the second second light-emitting layer, and the second second charge generation layer being located between the second second light-emitting layer and the third second light-emitting layer; The normal projection of the first layer of the second charge generation layer on the substrate substrate does not overlap with the normal projection of the pixel opening area of the first color sub-pixel on the substrate substrate; The normal projection of the second layer of the second charge generation layer on the substrate substrate does not overlap with the normal projection of the pixel opening area of the first color sub-pixel on the substrate substrate.

6. The display panel of claim 1, wherein, Among the at least two colors of sub-pixels, the third color sub-pixel includes at least one third light-emitting layer; In the case where the number of third light-emitting layers included in the third color sub-pixel is less than the number of second light-emitting layers included in the second color sub-pixel, the normal projection of the second charge generation layer farthest from the substrate substrate on the substrate substrate does not overlap with the normal projection of the pixel opening area of the third color sub-pixel on the substrate substrate.

7. The display panel of claim 1, wherein, Among the at least two colors of sub-pixels, the third color sub-pixel includes at least two layers of third light-emitting layers stacked; the third color sub-pixel also includes at least one third charge generation layer, and there is one third charge generation layer between the two adjacent third light-emitting layers; The third charge generation layer closest to the substrate substrate is arranged in the same layer and the same material as the second charge generation layer closest to the substrate substrate; The third charge generation layer closest to the substrate substrate is independent of the second charge generation layer closest to the substrate substrate; or the third charge generation layer closest to the substrate substrate and the second charge generation layer closest to the substrate substrate form a common charge generation layer in an integrated structure.

8. The display panel of claim 7, wherein, The third color sub-pixel includes a first layer of third light-emitting layer, a second layer of third light-emitting layer and a third layer of third light-emitting layer stacked in the direction away from the substrate substrate, and also includes a first layer of third charge generation layer and a second layer of third charge generation layer, the first layer of third charge generation layer is located between the first layer of third light-emitting layer and the second layer of third light-emitting layer, and the second layer of third charge generation layer is located between the second layer of third light-emitting layer and the third layer of third light-emitting layer; The first layer of third charge generation layer and the first layer of second charge generation layer are independent of each other; or the first layer of third charge generation layer and the first layer of second charge generation layer form a common charge generation layer in an integrated structure; And / or, The second layer of third charge generation layer and the second layer of second charge generation layer are independent of each other; or the second layer of third charge generation layer and the second layer of second charge generation layer form a common charge generation layer in an integrated structure.

9. The display panel of claim 7, wherein, The third color sub-pixel includes a first layer of third light-emitting layer, a second layer of third light-emitting layer and a third layer of third light-emitting layer stacked in the direction away from the substrate substrate, and also includes a first layer of third charge generation layer and a second layer of third charge generation layer, the first layer of third charge generation layer is located between the first layer of third light-emitting layer and the second layer of third light-emitting layer, and the second layer of third charge generation layer is located between the second layer of third light-emitting layer and the third layer of third light-emitting layer; In the case where the first color sub-pixel includes a first light-emitting layer: A normal projection of the first layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate. A normal projection of the second layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate.

10. The display panel of claim 7, wherein, Among the at least two colors of sub-pixels, the third color sub-pixel comprises two layers of third light-emitting layers arranged in a stack; the third color sub-pixel further comprises a layer of third charge generation layer, and the layer of third charge generation layer is located between the two layers of third light-emitting layers. In a case where the first color sub-pixel comprises a layer of first light-emitting layer, a normal projection of the layer of third charge generation layer on the substrate substrate does not overlap with a normal projection of the pixel opening region of the first color sub-pixel on the substrate substrate.

11. The display panel according to any one of claims 6-10, characterized in that, The second color sub-pixel comprises a blue sub-pixel, one of the first color sub-pixel and the third color sub-pixel comprises a red sub-pixel, and the other of the first color sub-pixel and the third color sub-pixel comprises a green sub-pixel.

12. The display panel of any one of claims 1-10, wherein, The plurality of second color sub-pixels included in the display panel are divided into a plurality of columns of second sub-pixel columns, the plurality of columns of second sub-pixel columns are arranged along a first direction, each column of second sub-pixel columns comprises a plurality of second color sub-pixels arranged along a second direction, and the first direction intersects the second direction. Among the second color sub-pixels belonging to the same column of second sub-pixel columns, the second charge generation layers located at the same layer are formed into a common second charge generation layer in an integrated structure.

13. The display panel according to any one of claims 6-10, characterized in that, In a case where the number of third light-emitting layers included in the third color sub-pixel is equal to the number of first light-emitting layers included in the first color sub-pixel: The display panel comprises a first power signal transmission layer and a second power signal transmission layer, the first power signal transmission layer and / or the second power signal transmission layer comprises a grid structure; the first color sub-pixel and the third color sub-pixel are coupled with the first power signal transmission layer, and the second color sub-pixel is coupled with the second power signal transmission layer.

14. The display panel according to any one of claims 6-10, wherein, In a case where the number of third light-emitting layers included in the third color sub-pixel is equal to the number of second light-emitting layers included in the second color sub-pixel: The display panel comprises a first power signal transmission layer and a second power signal transmission layer, the first power signal transmission layer and / or the second power signal transmission layer comprises a grid structure; the first color sub-pixel is coupled with the first power signal transmission layer, and the second color sub-pixel and the third color sub-pixel are coupled with the second power signal transmission layer.

15. The display panel according to any one of claims 6-10, wherein, In a case where the number of third light-emitting layers included in the third color sub-pixel is equal to the number of first light-emitting layers included in the first color sub-pixel: The display panel comprises a first second power signal transmission layer and a second second power signal transmission layer, the first color sub-pixel and the third color sub-pixel are coupled with the first second power signal transmission layer respectively, and the second color sub-pixel is coupled with the second second power signal transmission layer.

16. The display panel of claim 15, wherein, The first second power signal transmission layer is formed in a comb structure, the first second power signal transmission layer comprises a first comb stem and a plurality of first comb teeth coupled with the first comb stem respectively; the second second power signal transmission layer is formed in a comb structure, the second second power signal transmission layer comprises a second comb stem and a plurality of second comb teeth coupled with the second comb stem respectively; the first comb teeth and the second comb teeth are arranged alternately along a first direction.

17. The display panel according to any one of claims 6-10, wherein, In a case where the third color sub-pixel comprises a third light-emitting layer in a number equal to a number of second light-emitting layers comprised by the second color sub-pixel: The display panel comprises a first second power signal transmission layer and a second second power signal transmission layer, the first color sub-pixel is coupled with the first second power signal transmission layer, and the second color sub-pixel and the third color sub-pixel are coupled with the second second power signal transmission layer respectively.

18. The display panel of claim 17, wherein, The first second power signal transmission layer is formed in a comb structure, the first second power signal transmission layer comprises a first comb stem and a plurality of first comb teeth coupled with the first comb stem respectively; the second second power signal transmission layer is formed in a comb structure, the second second power signal transmission layer comprises a second comb stem and a plurality of second comb teeth coupled with the second comb stem respectively; the first comb teeth and the second comb teeth are arranged alternately along a second direction; The first comb teeth comprise a first comb tooth main body part and a plurality of first comb tooth extension parts coupled with the first comb tooth main body part respectively, along the second direction, the first comb tooth extension parts are located at a first side of the first comb tooth main body part; the second comb teeth comprise a second comb tooth main body part and a plurality of second comb tooth extension parts coupled with the second comb tooth main body part respectively, along the second direction, the second comb tooth extension parts are located at a second side of the second comb tooth main body part; The plurality of first comb teeth and the plurality of second comb teeth are divided into a plurality of comb tooth groups, each comb tooth group comprises one first comb tooth and one second comb tooth adjacent to each other, in the same comb tooth group, the first comb tooth extension parts and the second comb tooth extension parts are arranged alternately along a first direction, and the first direction intersects the second direction.

19. A display device comprising: The display panel comprises a display panel as claimed in any one of claims 1 to 18.

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