Display panel

Abstract

A display panel comprises: a substrate; the back plate is positioned on one side of the substrate; the light-emitting device layer is positioned on one side, far away from the substrate, of the back plate; a light-emitting device in the light-emitting device layer comprises a plurality of groups of sub-light-emitting devices in one-to-one correspondence with a plurality of colors, and each group of sub-light-emitting devices comprises at least one sub-light-emitting device; the various colors comprise red, blue and green; the packaging layer is positioned on one side, far away from the substrate, of the light-emitting device layer; the color film layer is positioned on one side, far away from the substrate, of the packaging layer; wherein at least one group of sub-light-emitting devices in the plurality of groups of sub-light-emitting devices comprises a laminated electroluminescent structure; the aperture ratio of the blue laminated electroluminescent structure ranges from 7% to 14%; the aperture ratio of the red or green laminated electroluminescent structure ranges from 3% to 7%.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and in particular, to a display panel. Background Art

[0002] With the development of organic light-emitting diode (OLED) display panels, in order to improve the battery life of the display panel, the demand for reducing the power consumption of the display panel is becoming stronger and stronger.

[0003] The power consumption of the display panel can be reduced by reducing the current density of the display panel. Currently, there are two ways to reduce the current density of the display panel: one is to improve the efficiency of the light-emitting device, and the other is to reduce the brightness of the product. And high brightness is the development trend of the display panel, so this contradiction can be solved by improving the efficiency of the light-emitting device.

[0004] The luminous efficiency of the light-emitting device can be improved by increasing the light transmittance of the light-emitting device. In the prior art, the color filter on encapsulation (COE) technology can be used on the encapsulation layer to increase the light transmittance by more than 50%. However, the degree of light reflection and the reflection color phase in the dark state will also increase, thereby reducing the integrated black effect of the product and further affecting the product quality. Summary of the Invention

[0005] Embodiments of the present disclosure provide a display panel to solve the above technical problems existing in the prior art.

[0006] In a first aspect, to solve the above technical problems, embodiments of the present disclosure provide a display panel, including:

[0007] A substrate;

[0008] A backplane located on one side of the substrate;

[0009] A light-emitting device layer located on the side of the backplane away from the substrate; the light-emitting devices in the light-emitting device layer include multiple groups of sub-light-emitting devices corresponding to multiple colors one by one, and each group of sub-light-emitting devices includes at least one sub-light-emitting device; the multiple colors include red, blue, and green;

[0010] An encapsulation layer located on the side of the light-emitting device layer away from the substrate;

[0011] A color film layer located on the side of the encapsulation layer away from the substrate;

[0012] Among them, at least one group of the multiple groups of sub-light-emitting devices includes a stacked electroluminescent structure; the aperture ratio range of the blue stacked electroluminescent structure is 7% to 14%; the aperture ratio range of the red or green stacked electroluminescent structure is 3% to 7%.

[0013] In a possible implementation, the light-emitting device includes 4 sub-light-emitting devices, where the light emitted by 2 sub-light-emitting devices is green and both include the stacked electroluminescent structure, and the remaining 2 sub-light-emitting devices both include a single-layer electroluminescent structure.

[0014] In a possible implementation, the light-emitting device includes 4 sub-light-emitting devices, where the light emitted by 2 sub-light-emitting devices is green and both include a single-layer electroluminescent structure;

[0015] The sub-light-emitting device that emits red light both includes a stacked electroluminescent structure;

[0016] The sub-light-emitting device that emits blue light both includes the single-layer electroluminescent structure.

[0017] In a possible implementation, the light-emitting device includes 4 sub-light-emitting devices, where the light emitted by 2 sub-light-emitting devices is green and both include a single-layer electroluminescent structure;

[0018] The sub-light-emitting device that emits red light both includes the single-layer electroluminescent structure;

[0019] The sub-light-emitting device that emits blue light both includes the stacked electroluminescent structure.

[0020] In a possible implementation, the light-emitting device layer includes:

[0021] A pixel definition layer, located on the side of the backplane away from the substrate; the pixel definition layer has a plurality of openings penetrating through the pixel definition layer;

[0022] Support pillars, located on the side of the pixel definition layer away from the substrate and not overlapping with the openings;

[0023] An anode, on the side of the backplane away from the substrate in the opening;

[0024] The stacked electroluminescent structure or the single-layer electroluminescent structure, on the side of the anode away from the substrate in the opening;

[0025] A cathode layer, located on the side of the stacked electroluminescent structure or the single-layer electroluminescent structure away from the substrate and covering the support pillars;

[0026] A light extraction layer, located on the side of the cathode layer away from the substrate.

[0027] A possible implementation, the stacked electroluminescent structure includes:

[0028] A hole transport layer, a first light-emitting layer, a first hole-blocking layer, an N-type charge generation layer, a P-type charge generation layer, a second light-emitting layer, a second hole-blocking layer, an electron transport layer, and an electron injection layer, which are stacked in sequence; wherein, the first light-emitting layer and the second light-emitting layer use the same light-emitting material.

[0029] A possible implementation, the single-layer electroluminescent structure includes:

[0030] A hole transport layer, a light-emitting layer, a hole-blocking layer, and an electron transport layer, which are stacked in sequence.

[0031] A possible implementation, the opening area of the stacked electroluminescent device is less than or equal to the opening area of the single-layer electroluminescent device.

[0032] A possible implementation, the color filter layer includes:

[0033] A black matrix, located on the side of the encapsulation layer away from the substrate; the black matrix includes a plurality of openings;

[0034] A plurality of color resistors, corresponding to the plurality of openings one by one.

[0035] A possible implementation, the color filter layer further includes:

[0036] A photoresist layer, located between the encapsulation layer and the black matrix;

[0037] The thickness of the color filter layer is greater than or equal to the sum of the thickness of the black matrix and the thickness of the photoresist layer. Description of the Drawings

[0038] Figure 1 It is a schematic diagram of the sub-pixel opening area in a pixel of a COE product in the related art;

[0039] Figure 2 It is a schematic diagram of the structure of a display panel provided by the present disclosure;

[0040] Figure 3 It is a schematic diagram of the sub-pixel opening area in a pixel provided by an embodiment of the present disclosure;

[0041] Figure 4 It is another schematic diagram of the sub-pixel opening area in a pixel provided by an embodiment of the present disclosure;

[0042] Figure 5 It is another schematic diagram of the sub-pixel opening area in a pixel provided by an embodiment of the present disclosure;

[0043] Figure 6 A reflection color contrast diagram provided by an embodiment of the present disclosure;

[0044] Figure 7 A schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0045] Figure 8 A schematic structural diagram of another display panel provided by an embodiment of the present disclosure;

[0046] Figure 9 A schematic structural diagram of another display panel provided by an embodiment of the present disclosure.

[0047] Reference numerals:

[0048] Substrate 1, backplane 2, light-emitting device layer 3, light-emitting device OL, sub-light-emitting device OL1, stacked electroluminescent structure Dou, single-layer electroluminescent structure Sig, encapsulation layer 4, color filter layer 5, pixel definition layer 31, support pillar 32, anode 33, cathode layer 34, light extraction layer 35, touch layer 6, black matrix 51, color resistor 52, photoresist layer 53. Detailed implementation manners

[0049] An embodiment of the present disclosure provides a display panel to solve the above technical problems.

[0050] It should be understood that the specific structures and functional details disclosed in the embodiments of the present disclosure are only representative and are for the purpose of describing the exemplary embodiments of the present disclosure. However, the present disclosure can be specifically implemented in many alternative forms or combinations and should not be construed as being limited only to the embodiments set forth herein.

[0051] In the description of the present disclosure, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0052] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "a" and "an" used herein are also intended to include the plural. It should also be understood that the terms "comprising" and / or "including" specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, integers, steps, operations, units, components, and / or combinations thereof.

[0053] The term "and / or" in the embodiments of the present disclosure merely describes the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally represents an "or" relationship between the associated objects before and after.

[0054] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the present disclosure will be further described below in conjunction with the drawings and embodiments. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present disclosure more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings represent the same or similar structures, so their repeated description will be omitted. The words expressing positions and directions described in the present disclosure are all illustrated by taking the drawings as examples, but can be changed according to needs, and all changes made are included in the protection scope of the present disclosure. The drawings of the present disclosure are only used to illustrate the relative position relationship and do not represent the actual proportion.

[0055] It should be noted that specific details are set forth in the following description to facilitate a thorough understanding of the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed below. The subsequent description of the specification is the preferred embodiment for implementing the present disclosure, but the description is for the purpose of explaining the general principles of the present disclosure and is not intended to limit the scope of the present disclosure. The protection scope of the present disclosure shall be subject to what is defined by the appended claims.

[0056] Please refer to Figure 1 FIG. is a schematic diagram of the aperture area of sub-pixels in a pixel of a COE product in the related art. The aperture area ratios of the red (R) sub-pixel, two green (G) sub-pixels, and the blue sub-pixel are 1:2:1.8. Therefore, for a single sub-pixel, the area ratio of R:G:B is 1:1:1.8. Since the total aperture area of the green sub-pixels is relatively large, under the same color filter film thickness, the dark state reflection of the COE product will be greenish. The human eye is more sensitive to green, so it will affect the integrated black effect.

[0057] Currently, on the one hand, this phenomenon can be alleviated by reducing the aperture ratio of the green sub-pixels, but this will sacrifice the product life; on the other hand, it can be alleviated by increasing the film thickness of the green color filter to reduce the green light transmittance, which will also sacrifice the product efficiency and life.

[0058] To solve the above problems, embodiments of the present disclosure provide a display panel, which will be specifically described below with reference to the accompanying drawings.

[0059] Please refer to Figure 2 FIG.

[0060] Substrate 1;

[0061] Backplane 2, located on one side of substrate 1;

[0062] Light-emitting device layer 3, located on the side of backplane 2 away from substrate 1; the light-emitting devices OL in light-emitting device layer 3 include multiple groups of sub-light-emitting devices OL1 corresponding to multiple colors one by one, and each group of sub-light-emitting devices OL1 includes at least one sub-light-emitting device OL1; the multiple colors include red, blue, and green.

[0063] Encapsulation layer 4, located on the side of light-emitting device layer 3 away from substrate 1;

[0064] Color filter layer 5, located on the side of encapsulation layer 4 away from substrate 1;

[0065] Among them, at least one group of sub-light-emitting devices OL1 in the multiple groups of sub-light-emitting devices OL1 includes a stacked electroluminescent structure Dou; the aperture ratio range of the blue stacked electroluminescent structure Dou is 7% to 14%; the aperture ratio range of the red or green stacked electroluminescent structure Dou is 3% to 7%.

[0066] As Figure 2 FIG. shows a light-emitting device OL included in light-emitting device layer 3. This light-emitting device OL includes 3 sub-light-emitting devices OL1, and each sub-light-emitting device OL1 is one group. One of the sub-light-emitting devices OL1 includes a stacked electroluminescent structure Dou, and the stacked electroluminescent structure Dou includes at least 2 layers of serially connected electroluminescent structures. Since the luminescence utilization rate of excitons in the stacked electroluminescent structure Dou is higher than that of the single-layer electroluminescent structure, the efficiency of the sub-light-emitting device OL1 including the stacked electroluminescent structure Dou will also increase exponentially. When reaching the same brightness, the current density of the stacked electroluminescent structure Dou is smaller and the lifespan is longer.

[0067] Since the COE technology is used to fabricate the color filter layer 5 on the encapsulation layer 4 in the display panel, the light transmittance of the display panel can be increased by 50%.

[0068] Please refer to Figure 3Schematic diagram of the aperture area of sub-pixels of a pixel provided by an embodiment of the present disclosure. The light-emitting device OL includes 4 sub-light-emitting devices OL1, where the light emitted by 2 sub-light-emitting devices OL1 is green and both include a stacked electroluminescent structure Dou, and the remaining 2 sub-light-emitting devices OL1 both include a single-layer electroluminescent structure Sig.

[0069] Figure 3 The area ratio of the red sub-pixel, 2 green sub-pixels, and blue sub-pixel becomes 1:1:1.8. Obviously, the area of a single blue sub-pixel is relatively Figure 1 halved compared to that of a single blue sub-pixel in , and the corresponding aperture ratio is also reduced. By comparing Figure 1 and Figure 3 it can be seen that: Figure 3 the aperture area of the 2 green sub-pixels in is relatively Figure 1 reduced compared to the aperture area of the 2 green sub-pixels in . Therefore, the reflectivity of the green sub-pixels can be reduced to prevent affecting the dark state all-black effect. Since the 2 green sub-pixels correspond to the sub-light-emitting device OL1 including a stacked electroluminescent structure Dou, the lifetime of the display panel will not be reduced due to the reduction of the aperture ratio and the same brightness as before can be maintained. Through testing, reducing the aperture ratio of the green sub-light-emitting device OL1 including a stacked electroluminescent structure to the range of 3% - 7% can better improve the reflection color phase of the display panel and prevent affecting the dark state all-black effect.

[0070] It should be noted that Figure 1 the sub-pixels in all use a single-layer electroluminescent structure.

[0071] In practical applications, a light-emitting device OL may also be composed of 1 green sub-light-emitting device OL1, 1 red sub-light-emitting device OL1, and 1 blue sub-light-emitting device OL1. Of course, it can also be composed of other quantity ratios, which are not limited here.

[0072] In some other embodiments, the light-emitting device OL includes 4 sub-light-emitting devices OL1, where the light emitted by 2 sub-light-emitting devices OL1 is green and both include a single-layer electroluminescent structure Sig;

[0073] the sub-light-emitting device OL1 that emits red light all includes a stacked electroluminescent structure Dou;

[0074] the sub-light-emitting device OL1 that emits blue light all includes a single-layer electroluminescent structure Sig. Please refer to Figure 4 Another schematic diagram of the aperture area of sub-pixels of a pixel provided by an embodiment of the present disclosure

[0075] Such as Figure 4The following is a schematic diagram of the aperture area of sub-pixels in another pixel provided by an embodiment of the present disclosure. The aperture ratio of the red sub-light-emitting device OL1 can also be reduced (relative to the single-layer electroluminescent structure Sig), and the corresponding red sub-light-emitting device OL1 is set to include a stacked electroluminescent structure Dou. At this time, the corresponding aperture ratio ranges from 3% to 7%. Figure 4 The area ratio of the red sub-pixel, 2 green sub-pixels, and blue sub-pixel becomes 0.5:2:1.8.

[0076] In some other embodiments, the light-emitting device OL includes 4 sub-light-emitting devices OL1, where the light emitted by 2 sub-light-emitting devices OL1 is green and both include a single-layer electroluminescent structure Sig;

[0077] The sub-light-emitting devices OL1 that emit red light all include a single-layer electroluminescent structure Sig;

[0078] The sub-light-emitting devices OL1 that emit blue light all include a stacked electroluminescent structure Dou.

[0079] As Figure 5 The following is a schematic diagram of the aperture area of sub-pixels in another pixel provided by an embodiment of the present disclosure. The aperture ratio of the blue sub-light-emitting device OL1 can also be reduced (relative to the single-layer electroluminescent structure Sig), and the corresponding blue sub-light-emitting device OL1 is set to include a stacked electroluminescent structure Dou. At this time, the corresponding aperture ratio ranges from 7% to 14%. Figure 5 The area ratio of the red sub-pixel, 2 green sub-pixels, and blue sub-pixel becomes 1:2:0.9.

[0080] Please continue to refer to Figures 3 - 5 , the aperture area of the stacked electroluminescent device OL is less than or equal to the aperture area of the single-layer electroluminescent device OL.

[0081] In practical applications, it is also possible to adjust the demand according to the reflection hue, so that more groups of sub-light-emitting devices OL1 include a stacked electroluminescent structure Dou, which will not be elaborated here.

[0082] Please refer to Table 1 for the data comparison table of the simulation for the above Figures 3 - 5 , and the comparison of the corresponding reflection hues is as Figure 6 shown, Figure 6 This is a reflection hue comparison diagram provided by an embodiment of the present disclosure.

[0083] Table 1

[0084]

[0085] Among them, R / G / B - BM OUT represents the distances from the opening edges of the black matrix 51 (BM) to the opening edges of the pixel definition layer 31 for R, G, and B in sequence in the horizontal direction. For example, 2.6 / 1.8 / 2.6 means that the horizontal distance from the opening edge of the black matrix 51 corresponding to the red sub - pixel to the opening edge of the pixel definition layer 31 is 2.6, the horizontal distance from the opening edge of the black matrix 51 corresponding to the green sub - pixel to the opening edge of the pixel definition layer 31 is 1.8, and the horizontal distance from the opening edge of the black matrix 51 corresponding to the blue sub - pixel to the opening edge of the pixel definition layer 31 is 2.6.

[0086] In Table 1, Ref, G↓, R↓, and B↓ all contain 4 sub - pixels, two of which are green sub - pixels, and the remaining two are one red sub - pixel and one blue sub - pixel. Ref represents the reference sample corresponding to Figure 1 Each sub - light - emitting device corresponding to each sub - pixel adopts a single - layer electroluminescent structure Sig (with one light - emitting layer); G↓ represents the sample corresponding to Figure 3 For the sample corresponding to, the sub - light - emitting devices OL1 corresponding to the 2 green sub - pixels include a stacked electroluminescent structure Dou (with 2 light - emitting layers), and the sub - light - emitting devices OL1 of the remaining colors include a single - layer electroluminescent structure Sig; R↓ represents the sample corresponding to Figure 4 For the sample corresponding to, the sub - light - emitting device OL1 corresponding to the red sub - pixel includes a stacked electroluminescent structure Dou, and the sub - light - emitting devices OL1 of the remaining colors include a single - layer electroluminescent structure Sig; B↓ represents the sample corresponding to Figure 5 For the sample corresponding to, the sub - light - emitting device OL1 corresponding to the blue sub - pixel includes a stacked electroluminescent structure Dou, and the sub - light - emitting devices OL1 of the remaining colors include a single - layer electroluminescent structure Sig.

[0087] It can be seen from Table 1 that the reflectivity corresponding to Ref ( Figure 1 ) is 6.7%, and the reflection hue (a*, b*) is (-1.85, 1.63); the reflectivity corresponding to G↓ ( Figure 3 ) is 6.17%, and the reflection hue (a*, b*) is (-0.34, -0.89). The reflectivity relative to Ref decreases from 6.7% to 6.17%, and the reflection hue changes from slightly green (-1.85, 1.63) to slightly cyan (-0.34, -0.89) that is not easily perceptible to the human eye; the reflectivity corresponding to R↓ ( Figure 4 ) is 6.42%, and the reflection hue (a*, b*) is (-1.82, -2). The reflectivity relative to Ref decreases from 6.7% to 6.42%, and the reflection hue changes from slightly green (-1.85, 1.63) to more cyan (-1.82, -2.0); the reflectivity corresponding to B↓ ( Figure 5)The corresponding reflectance is 6.55%, the reflected color phase (a*, b*) is (-2.32, -3.42), the relative reflectance to Ref decreases from 6.7% to 6.55%, and the reflected color phase becomes greener from a greenish tint (-1.85, 1.63) to a more greenish tint (-2.32, -3.42). This situation is applicable when the initial sample is powdery or purplish, and the product can be adjusted to a bluish state that is not easily perceptible to the human eye. Thus, by making the sub-light-emitting device OL1 include the stacked electroluminescent structure Dou and relatively reducing the aperture ratio compared to the original, the reflectance of the display panel can be effectively reduced, and the reflected color phase can be adjusted.

[0088] In the embodiment provided by the present disclosure, the light transmittance of the display panel is improved by fabricating a color film layer 5 on the encapsulation layer 4 of the display panel, and at least one group of sub-light-emitting devices OL1 in the display panel includes a stacked electroluminescent structure Dou. Among them, the aperture ratio range of the blue stacked electroluminescent structure Dou is 7% - 14%; the aperture ratio range of the red or green stacked electroluminescent structure Dou is 3% - 7%. It is possible to improve the reflected color phase of the display panel while reducing the reflectance of the display panel, and without reducing the efficiency and lifespan of the display panel.

[0089] Please refer to Figure 7 which is a schematic structural diagram of another display panel provided by the embodiment of the present disclosure. The light-emitting device layer 3 in this display panel further includes:

[0090] A pixel definition layer 31, located on the side of the backplane 2 away from the substrate 1; the pixel definition layer 31 has a plurality of openings penetrating through the pixel definition layer 31;

[0091] Support pillars 32, located on the side of the pixel definition layer 31 away from the substrate 1 and not overlapping with the openings;

[0092] An anode 33, located on the side of the backplane 2 away from the substrate 1 in the opening of the pixel definition layer 31;

[0093] A stacked electroluminescent structure Dou or a single-layer electroluminescent structure Sig, located on the side of the anode 33 away from the substrate 1 in the opening;

[0094] A cathode layer 34, located on the side of the stacked electroluminescent structure Dou or the single-layer electroluminescent structure Sig away from the substrate 1 and covering the support pillars 32;

[0095] A light extraction layer 35, located on the side of the cathode layer 34 away from the substrate 1.

[0096] As Figure 7 shown, by providing support pillars 32 on the pixel definition layer 31 that do not overlap with the openings of the pixel definition layer 31, the film layer of the stacked electroluminescent structure Dou can be accommodated in the opening space surrounded by the pixel definition layer 31 and the support pillars 32.

[0097] The single-layer electroluminescent structure Sig includes:

[0098] A hole transport layer (HTL), an emitting layer (EML), a hole blocking layer (HBL), and an electron transport layer (ETL) that are sequentially stacked.

[0099] Please continue to refer to Figure 7 , the stacked electroluminescent structure Dou includes:

[0100] A hole transport layer (HTL), a first emitting layer (EML1), a first hole blocking layer (HBL1), an N-type charge generation layer (N-CGL), a P-type charge generation layer (P-CGL), a second emitting layer (EML2), a second hole blocking layer (HBL2), an electron transport layer (ETL), and an electron injection layer (EIL) that are sequentially stacked; wherein, the first emitting layer and the second emitting layer use the same light-emitting material.

[0101] Please refer to Figure 8 For a schematic structural diagram of another display panel provided by an embodiment of the present disclosure, the display panel further includes:

[0102] A touch layer 6, located between the encapsulation layer 4 and the color filter layer 5.

[0103] By providing the touch layer 6 between the encapsulation layer 4 and the color filter layer 5, the display panel can implement a touch function.

[0104] Please continue to refer to Figure 8 , the color filter layer 5 includes:

[0105] A black matrix 51, located on the side of the encapsulation layer 4 away from the substrate 1; the black matrix 51 includes a plurality of openings;

[0106] A plurality of color filters 52, corresponding to the plurality of openings one by one.

[0107] Please refer to Figure 9 For a schematic structural diagram of another display panel provided by an embodiment of the present disclosure, the color filter layer 5 further includes:

[0108] A photoresist layer 53, located between the encapsulation layer 4 and the black matrix 51; the photoresist layer 53 uses a photoresist with a refractive index less than 1.6.

[0109] As Figure 9 shown, when the display panel includes the touch layer 6, the photoresist layer 53 may also be located between the touch layer 6 and the black matrix 51.

[0110] The thickness d1 of the color resist 52 is greater than or equal to the sum of the thickness d2 of the black matrix 51 and the thickness d3 of the photoresist layer 53.

[0111] The photoresist layer also has openings corresponding one by one to the plurality of color resists 52, and the orthographic projection of the opening of the photoresist layer on the substrate 1 is located within the orthographic projection of the opening of the black matrix 51 on the substrate 1.

[0112] By providing a photoresist layer between the encapsulation layer 4 and the black matrix 51, the EIC technology can be used to reduce the power consumption of the display panel; wherein, the EIC technology includes the COE technology and the Enhanced Efficiency Structure (EES) technology.

[0113] The display panel may be: an Organic Light Emitting Diode (OLED) display panel, a Quantum Dot Light Emitting Diodes (QLED) display panel, a Micro Light Emitting Diodes (Micro LED) display panel, etc., and the present disclosure does not make specific limitations thereto.

[0114] Although the preferred embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present disclosure.

[0115] Obviously, those skilled in the art can make various changes and modifications to the present disclosure without departing from the spirit and scope of the present disclosure. Thus, if these modifications and variations of the present disclosure fall within the scope of the claims of the present disclosure and their equivalent technologies, the present disclosure is also intended to include these changes and modifications.

Claims

1. A display panel, wherein, Comprising: A substrate; A backplane located on one side of the substrate; A light-emitting device layer located on the side of the backplane away from the substrate; the light-emitting devices in the light-emitting device layer include multiple groups of sub-light-emitting devices corresponding to multiple colors one by one, and each group of sub-light-emitting devices includes at least one sub-light-emitting device; The multiple colors include red, blue, and green; A packaging layer located on the side of the light-emitting device layer away from the substrate; A color filter layer located on the side of the packaging layer away from the substrate; Wherein, at least one group of the multiple groups of sub-light-emitting devices includes a stacked electroluminescent structure; the aperture ratio range of the stacked electroluminescent structure for blue is 7% - 14%; the aperture ratio range of the stacked electroluminescent structure for red or green is 3% - 7%.

2. The display panel according to claim 1, wherein, The light-emitting device includes 4 sub-light-emitting devices, wherein the light emitted by 2 sub-light-emitting devices is green and both include the stacked electroluminescent structure, and the remaining 2 sub-light-emitting devices both include a single-layer electroluminescent structure.

3. The display panel according to claim 1, wherein, The light-emitting device includes 4 sub-light-emitting devices, wherein the light emitted by 2 sub-light-emitting devices is green and both include a single-layer electroluminescent structure; The sub-light-emitting device that emits red light both includes a stacked electroluminescent structure; The sub-light-emitting device that emits blue light both includes the single-layer electroluminescent structure.

4. The display panel according to claim 1, wherein, The light-emitting device includes 4 sub-light-emitting devices, wherein the light emitted by 2 sub-light-emitting devices is green and both include a single-layer electroluminescent structure; The sub-light-emitting device that emits red light both includes the single-layer electroluminescent structure; The sub-light-emitting device that emits blue light both includes the stacked electroluminescent structure.

5. The display panel according to any one of claims 2-4, wherein, The light-emitting device layer includes: A pixel definition layer located on the side of the backplane away from the substrate; the pixel definition layer has multiple openings penetrating through the pixel definition layer; Support pillars located on the side of the pixel definition layer away from the substrate and not overlapping with the openings; An anode on the side of the backplane away from the substrate in the opening; The stacked electroluminescent structure or the single-layer electroluminescent structure on the side of the anode away from the substrate in the opening; A cathode layer located on the side of the stacked electroluminescent structure or the single-layer electroluminescent structure away from the substrate and covering the support pillars; A light extraction layer located on the side of the cathode layer away from the substrate.

6. The display panel according to claim 5, wherein, The stacked electroluminescent structure includes: A hole transport layer, a first light-emitting layer, a first hole blocking layer, an N-type charge generation layer, a P-type charge generation layer, a second light-emitting layer, a second hole blocking layer, an electron transport layer, and an electron injection layer stacked in sequence; wherein, the first light-emitting layer and the second light-emitting layer use the same light-emitting material.

7. The display panel according to claim 5, wherein, The single-layer electroluminescent structure includes: A hole transport layer, a light-emitting layer, a hole blocking layer, and an electron transport layer stacked in sequence.

8. The display panel according to any one of claims 2-7, wherein, The opening area of the stacked electroluminescent device is less than or equal to the opening area of the single-layer electroluminescent device.

9. The display panel according to any one of claims 1-8, wherein, The color filter layer includes: A black matrix located on the side of the packaging layer away from the substrate; the black matrix includes multiple openings; Multiple color resistors corresponding to the multiple openings one by one.

10. The display panel according to claim 9, wherein, The color film layer further includes: a photoresist layer located between the encapsulation layer and the black matrix; the thickness of the color film layer is greater than or equal to the sum of the thickness of the black matrix and the thickness of the photoresist layer.

Images