Display panel and display device

Abstract

The embodiment of the utility model provides a display panel and a display device, relates to the technical field of display, and is used for improving the display effect of the display panel and prolonging the overall service life of the display panel. The display panel comprises a plurality of sub-pixels, and the plurality of sub-pixels comprise a red sub-pixel, a green sub-pixel, a first blue sub-pixel and a second blue sub-pixel. The wavelength peak value of the light emitted by the first blue sub-pixel is larger than the wavelength peak value of the light emitted by the second blue sub-pixel. Wherein the sub-pixel comprises a light-emitting layer, and the material of the light-emitting layer comprises quantum dots. The display panel is used for displaying images.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more particularly to a display panel and display device. Background Technology

[0002] Quantum dot organic light-emitting diodes (QD-OLEDs) have been widely used in the display field due to their advantages such as self-illumination, high contrast, wide color gamut, wide viewing angle, fast response speed, and foldability. However, blue quantum dot OLEDs have a relatively low lifespan, which can easily affect the lifespan of the display panel when it includes blue quantum dot OLEDs. Utility Model Content

[0003] The purpose of the embodiments disclosed herein is to provide a display panel and a display device for improving the display effect of the display panel and extending the overall lifespan of the display panel.

[0004] To achieve the above objectives, the embodiments of this disclosure provide the following technical solutions:

[0005] On one hand, a display panel is provided. The display panel includes a plurality of sub-pixels, the plurality of sub-pixels including a red sub-pixel, a green sub-pixel, a first blue sub-pixel, and a second blue sub-pixel. The peak wavelength of light emitted by the first blue sub-pixel is greater than the peak wavelength of light emitted by the second blue sub-pixel. At least one of the plurality of sub-pixels includes a light-emitting layer, and the material of the light-emitting layer includes quantum dots.

[0006] In the aforementioned display panel, multiple sub-pixels include red sub-pixels, green sub-pixels, a first blue sub-pixel, and a second blue sub-pixel. The peak wavelength of light emitted by the first blue sub-pixel is greater than that of the second blue sub-pixel. On one hand, this helps expand the color gamut of the display panel and improve its color adjustment capabilities, thereby enabling more accurate color reproduction and ultimately enhancing the display effect. On the other hand, the second blue sub-pixel in a display panel typically has lower luminous efficiency and a shorter lifespan. By incorporating a first blue sub-pixel into the display panel, the first blue sub-pixel can compensate for the lower luminous ratio of the second blue sub-pixel when the display panel emits light. This reduces the luminous ratio of the second blue sub-pixel, thereby reducing its emission time and intensity. This extends the overall lifespan of the display panel and improves its stability and reliability.

[0007] In some embodiments, the materials of the light-emitting layer of the red sub-pixel and the light-emitting layer of the green sub-pixel both include cadmium-free quantum dots, and the materials of the light-emitting layer of the first blue sub-pixel and the light-emitting layer of the second blue sub-pixel both include cadmium-based quantum dots.

[0008] In some embodiments, the sub-pixel further includes a hole transport layer located on one side of the light-emitting layer. The material of the hole transport layer of at least one of the red and green sub-pixels is different from the material of the hole transport layer of at least one of the first and second blue sub-pixels.

[0009] In some embodiments, the materials of the hole transport layer of the red sub-pixel and the hole transport layer of the green sub-pixel both include TFB, and the materials of the hole transport layer of the first blue sub-pixel and the hole transport layer of the second blue sub-pixel both include PF8CZ.

[0010] In some embodiments, the sub-pixel includes an electron transport layer located on one side of the light-emitting layer. The electron transport layer is made of magnesium. The plurality of sub-pixels includes a first target sub-pixel and a second target sub-pixel, wherein the wavelength of light emitted by the first target sub-pixel is greater than the wavelength of light emitted by the second target sub-pixel. The magnesium content in the material of the electron transport layer of the first target sub-pixel is greater than or equal to the magnesium content in the material of the electron transport layer of the second target sub-pixel.

[0011] In some embodiments, the display panel further includes a substrate, and a plurality of sub-pixels are located on the same side of the substrate. Each sub-pixel also includes a first electrode, a hole transport layer, an electron transport layer, and a second electrode sequentially stacked along the thickness direction of the substrate, with a light-emitting layer located between the hole transport layer and the electron transport layer. Specifically, the first electrode of the red and green sub-pixels is closer to the substrate than the second electrode, and the second electrode of the first and second blue sub-pixels is closer to the substrate than the first electrode.

[0012] In some embodiments, the difference between the wavelength of light emitted by the first blue sub-pixel and the wavelength of light emitted by the second blue sub-pixel is greater than or equal to 1 nm and less than or equal to 70 nm.

[0013] In some embodiments, the wavelength of light emitted by the first blue sub-pixel is greater than or equal to 470 nm and less than or equal to 510 nm.

[0014] In some embodiments, the wavelength of light emitted by the second blue sub-pixel is greater than or equal to 440 nm and less than 470 nm.

[0015] In some embodiments, the display panel includes multiple rows of first pixels, each row including alternating red subpixels, green subpixels, first blue subpixels, and second blue subpixels arranged along a first direction. The multiple rows of first pixels are spaced apart along a second direction, which intersects the first direction.

[0016] In some embodiments, the display panel further includes a second pixel row, a third pixel row, and a fourth pixel row. The second pixel row includes a plurality of red sub-pixels and a plurality of second blue sub-pixels, arranged alternately along a first direction. The third pixel row includes a plurality of red sub-pixels and a plurality of first blue sub-pixels, arranged alternately along the first direction. The third pixel row and the second pixel row are arranged alternately along a second direction, which intersects the first direction. The fourth pixel row includes a plurality of green sub-pixels spaced apart along the first direction. The fourth pixel row is located between adjacent second and third pixel rows.

[0017] In this configuration, along the second direction, the first blue sub-pixel in the third pixel row is positioned opposite to the red sub-pixel in the second pixel row, and the red sub-pixel in the third pixel row is positioned opposite to the second blue sub-pixel in the second pixel row. The green sub-pixel corresponds in the second direction to the gap area between the red and blue sub-pixels in the second pixel row.

[0018] In some embodiments, the display panel further includes a fifth pixel row, a sixth pixel row, and a seventh pixel row. The fifth pixel row includes a plurality of green sub-pixels and a plurality of first blue sub-pixels, arranged alternately along a first direction. The sixth pixel row includes a plurality of green sub-pixels and a plurality of second blue sub-pixels, arranged alternately along the first direction. The sixth pixel row and the fifth pixel row are arranged alternately along a second direction, which intersects the first direction. The seventh pixel row includes a plurality of red sub-pixels spaced apart along the first direction. The seventh pixel row is located between adjacent fifth and sixth pixel rows.

[0019] In this context, along the second direction, the green sub-pixel in the fifth pixel row, the second blue sub-pixel in the sixth pixel row, and the red sub-pixel in the seventh pixel row are set relative to each other, as are the first blue sub-pixel in the fifth pixel row, the green sub-pixel in the sixth pixel row, and the red sub-pixel in the seventh pixel row.

[0020] On the other hand, a display device is provided. The display device includes a display panel and a circuit board as described in any of the above embodiments. The circuit board and the display panel are electrically connected.

[0021] The above-described display device has the same structure and beneficial technical effects as the display panel provided in some of the above embodiments, and will not be described again here. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0023] Figure 1 This is a structural diagram of a display device according to some embodiments;

[0024] Figure 2 This is a structural diagram of a display panel according to some embodiments;

[0025] Figure 3 A planar portion of a display panel according to some embodiments Figure 1 ;

[0026] Figure 4 A planar portion of a display panel according to some embodiments Figure 2 ;

[0027] Figure 5 A planar portion of a display panel according to some embodiments Figure 3 ;

[0028] Figure 6 A chromaticity map of red sub-pixels, green sub-pixels, first blue sub-pixels and second blue sub-pixels in a display panel according to some embodiments;

[0029] Figure 7 This is a light emission spectrum of a red sub-pixel within a display panel according to some embodiments;

[0030] Figure 8 This is a light emission spectrum of a green sub-pixel within a display panel according to some embodiments;

[0031] Figure 9 This is a light emission spectrum of a first blue sub-pixel within a display panel according to some embodiments;

[0032] Figure 10 This is a light emission spectrum of a second blue sub-pixel within a display panel according to some embodiments;

[0033] Figure 11Structure of subpixels within a display panel according to some embodiments Figure 1 ;

[0034] Figure 12 Structure of subpixels within a display panel according to some embodiments Figure 2 . Detailed Implementation

[0035] The technical solutions in some embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this disclosure are within the scope of protection of this disclosure.

[0036] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0037] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0038] In describing some embodiments, the terms "coupled" and "connected," and their derivative expressions, may be used. The term "connected" should be interpreted broadly; for example, a "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection via an intermediate medium. The term "coupled," for example, indicates that two or more components have direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that do not have direct contact with each other but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the content of this document.

[0039] "At least one of A, B and C" has the same meaning as "at least one of A, B or C", both including the following combinations of A, B and C: only A, only B, only C, combinations of A and B, combinations of A and C, combinations of B and C, and combinations of A, B and C.

[0040] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0041] As used herein, depending on the context, the term “if” may optionally be interpreted as meaning “when”, “in the event of”, “in response to determination”, or “in response to detection”. Similarly, depending on the context, the phrase “if it is determined that…” or “if [the stated condition or event] is detected” may optionally be interpreted as meaning “in the event of determination that…”, “in response to determination that…”, “when [the stated condition or event] is detected”, or “in response to the detection of [the stated condition or event]”.

[0042] The use of “applies to” or “configured to” in this article implies an open and inclusive language that does not preclude applicability to or configuration to devices that perform additional tasks or steps.

[0043] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0044] As used herein, “about,” “approximately,” or “approximately” includes the stated value and the average value within an acceptable range of deviation from the given value, wherein the acceptable range of deviation is determined by a person skilled in the art taking into account the measurement under discussion and the error associated with the measurement of the given quantity (i.e., the limitations of the measurement system).

[0045] As used herein, “parallel,” “perpendicular,” and “equal” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 5°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 5°; “equal” includes absolute equality and approximate equality, where an acceptable range of deviation for approximate equality may be, for example, a difference between the two equals being less than or equal to 5% of either one.

[0046] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0047] This document describes exemplary embodiments with reference to cross-sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and the area of ​​regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as being limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0048] For ease of description below, an XYZ coordinate system is established. The third direction Z represents the thickness direction of the display panel, the XY plane is perpendicular to the Z direction, and the first direction X intersects the second direction Y. For example, the first direction X and the second direction Y are perpendicular to each other.

[0049] It should be noted that, for example, R / F in the accompanying drawings of this disclosure indicates that a component is both R and F, and other similar reference numerals in the drawings shall follow the above description.

[0050] like Figure 1 As shown, some embodiments of this disclosure provide a display device 100.

[0051] Exemplarily, the display device 100 can be any device that displays images, whether moving (e.g., video) or stationary (e.g., still images), and whether text or images. More specifically, the embodiments described are contemplated to be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal digital assistants (PDAs), handheld or portable computers, Global Positioning System (GPS) receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc. Figure 1 The following is an illustration using a mobile phone as an example of a display device 100.

[0052] For example, the display device 100 may be an electroluminescent display device or a photoluminescent display device. When the display device 100 is an electroluminescent display device, it may be an organic light-emitting diode (OLED) or a quantum dot light-emitting diode (QLED). When the display device 100 is a photoluminescent display device, it may be a quantum dot photoluminescent display device.

[0053] The display device 100 may also be a micro light-emitting diode (Micro LED) display device or a mini light-emitting diode (Mini LED) display device.

[0054] In some embodiments, please continue reading Figure 1 The display device 100 may include a display panel 10 and a circuit board (not shown). The circuit board is electrically connected to the display panel 10 and can be configured to drive the display panel 10 to display an image.

[0055] For example, circuit boards include, but are not limited to, printed circuit boards (PCBs) and flexible printed circuit boards (FPCs).

[0056] The display panel 10 described above will be described in detail below.

[0057] In some embodiments, such as Figure 2 As shown, Figure 2 This is a structural diagram of a display panel 10 according to some embodiments. The display panel 10 can be a rectangular structure.

[0058] It should be noted that the aforementioned "rectangular structure" refers to the fact that the overall shape of the boundary of the display panel 10 is rectangular, but it is not limited to a standard rectangle. That is, "rectangle" here includes not only the shape of a standard rectangle, but also, considering manufacturing processes, shapes similar to rectangles. For example, please refer to [further details omitted]. Figure 2 The long and short sides of the rectangle are curved at each intersection (i.e., at the corner G), meaning the corner G is smooth, so that the boundary of the display panel 10 is a rounded rectangle in the plan view.

[0059] In other embodiments, the display panel 10 may be a circular structure or other shapes with corners.

[0060] The following uses a rectangular structure for the display panel 10 as an example to illustrate some embodiments of the present disclosure. However, the implementation of the present disclosure includes, but is not limited to, this, and the shape of the display panel 10 can also be any other shape.

[0061] In some embodiments, please continue reading Figure 2 The display panel 10 has a display area AA for displaying images and a peripheral area AN located on at least one side of the display area AA.

[0062] For example, the peripheral area AN can be located on one side of the display area AA.

[0063] Alternatively, the peripheral area AN can be located on opposite sides of the display area AA.

[0064] Alternatively, please continue reading Figure 2 The surrounding area AN can surround the display area AA.

[0065] It should be noted that the specific setting of the peripheral area AN is related to the specific design of the display panel 10, and can be designed according to actual needs. This is only an example and is not intended to limit this disclosure.

[0066] For example, please continue reading Figure 2The peripheral area AN of the display panel 10 may contain a gate driver on array (GOA) and control signal lines (e.g., clock signal lines, power supply voltage signal lines, etc.). However, the functions of the peripheral area AN of the display panel 10 include, but are not limited to, these.

[0067] In some embodiments, please continue reading Figure 2 The display panel 10 includes multiple sub-pixels F.

[0068] For example, please continue reading Figure 2 Multiple sub-pixels F within the display panel 10 can be located within the display area AA of the display panel 10, and the sub-pixel F is the smallest light-emitting unit within the display area AA.

[0069] For example, such as Figure 3 , Figure 4 and Figure 5 As shown, Figure 3 , Figure 4 and Figure 5 All are plan views of partial areas of the display panel 10 according to some embodiments. Multiple sub-pixels F within the display panel 10 can emit light of different colors, thereby achieving multi-color light emission from the display panel 10.

[0070] For example, the multiple sub-pixels F within the display panel 10 may include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2. The peak wavelength of the light emitted by the first blue sub-pixel B1 is greater than the peak wavelength of the light emitted by the second blue sub-pixel B2.

[0071] Among them, the red sub-pixel R can emit red light, the green sub-pixel G can emit green light, the first blue sub-pixel B1 can emit first blue light, and the second blue sub-pixel B2 can emit second blue light.

[0072] like Figure 6 As shown, Figure 6 This is a chromaticity map of the red sub-pixel R, green sub-pixel G, first blue sub-pixel B1, and second blue sub-pixel B2 within a display panel 10 according to some embodiments. It should be noted that... Figure 6 This can be a CIE chromaticity diagram of the red sub-pixel R, green sub-pixel G, first blue sub-pixel B1, and second blue sub-pixel B2 within the display panel 10 according to some embodiments. The CIE chromaticity diagram (e.g., the CIE 1931 chromaticity diagram) is a diagram used by the International Commission on Illumination (ICI). The standard colorimetric system developed by the CIE.

[0073] By making the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1 and a second blue sub-pixel B2, and making the peak wavelength of the light emitted by the first blue sub-pixel B1 greater than the peak wavelength of the light emitted by the second blue sub-pixel B2, on the one hand, it is beneficial to expand the color gamut range of the display panel 10 and improve the color adjustment capability of the display panel 10, thereby enabling the display panel 10 to achieve more accurate color reproduction, and thus improving the display effect of the display panel 10.

[0074] On the other hand, the second blue sub-pixel B2 within the display panel 10 has low luminous efficiency and a short luminous lifespan. By providing the first blue sub-pixel B1 within the display panel 10, the display panel 10 emits light (for example, please refer to...). Figure 6 When the color of the light emitted by the display panel 10 is M), the first blue sub-pixel B1 can compensate for the light emission ratio of the second blue sub-pixel B2, thereby reducing the light emission ratio of the second blue sub-pixel B2, which in turn reduces the light emission time and intensity of the second blue sub-pixel B2. This is beneficial to extending the overall lifespan of the display panel 10 and improving the stability and reliability of the display panel 10.

[0075] Especially when the target light-emitting position of the display panel 10 is above the B1R line, the light emission ratio of the red sub-pixel R, the green sub-pixel G and the first blue sub-pixel B1 can be adjusted to prevent the second blue sub-pixel B2 from emitting light. The light emission efficiency and lifespan of the first blue sub-pixel B1 are higher than those of the second blue sub-pixel B2, which is beneficial to further extend the overall lifespan of the display panel 10 and further improve the stability and reliability of the display panel 10.

[0076] For example, please continue reading Figure 3 , Figure 4 and Figure 5 In the case where the multiple sub-pixels F in the display panel 10 include red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2, and the peak wavelength of the light emitted by the first blue sub-pixel B1 is greater than the peak wavelength of the light emitted by the second blue sub-pixel B2, the difference between the wavelength of the light emitted by the first blue sub-pixel B1 and the wavelength of the light emitted by the second blue sub-pixel B2 can be greater than or equal to 1nm and less than or equal to 70nm.

[0077] For example, please continue reading Figure 3 , Figure 4 and Figure 5The difference between the wavelength of light emitted by the first blue sub-pixel B1 and the wavelength of light emitted by the second blue sub-pixel B2 can be 1nm, 5nm, 10nm, 15nm, 20nm, 25nm, 30nm, 35nm, 40nm, 45nm, 50nm, 55nm, 60nm, 65nm, or 70nm, etc.

[0078] In the aforementioned display panel 10, the difference between the wavelength of light emitted by the first blue sub-pixel B1 and the wavelength of light emitted by the second blue sub-pixel B2 is greater than or equal to 1 nm and less than or equal to 70 nm. On the one hand, this allows the wavelength of light emitted by the first blue sub-pixel B1 to be longer, which is beneficial to improving the luminous efficiency and luminous lifespan of the first blue sub-pixel B1, thereby extending the overall lifespan of the display panel 10 and improving the stability and reliability of the display panel 10.

[0079] On the other hand, it can avoid the light emitted by the first blue sub-pixel B1 having an excessively long wavelength, so that the wavelength of the light emitted by the first blue sub-pixel B1 is less than the wavelength of the light emitted by the green sub-pixel G. This is beneficial to expanding the color gamut range of the display panel 10 and improving the color adjustment capability of the display panel 10. This, in turn, is beneficial to the display panel 10 to achieve more accurate color reproduction, thereby improving the display effect of the display panel 10.

[0080] For example, such as Figure 7 As shown, Figure 7 This is a light emission spectrum diagram of the red sub-pixel R within the display panel 10 according to some embodiments. It should be noted that... Figure 7 The horizontal axis represents wavelength (nm), the vertical axis represents photoluminescence intensity (PL intensity) (au), and curve R11 represents the photoluminescence intensity distribution of light emitted by the red sub-pixel R within the display panel 10 within a specific wavelength range.

[0081] The wavelength of light emitted by the red sub-pixel R within the display panel 10 can be greater than or equal to 610nm and less than or equal to 640nm.

[0082] The full width at half maximum (FWHM) of the light emitted by the red subpixel R can be less than 50 nm. Alternatively, the FWHM of the light emitted by the red subpixel R can be less than 30 nm.

[0083] For example, such as Figure 8 As shown, Figure 8This is a light emission spectrum diagram of the green sub-pixel G within the display panel 10 according to some embodiments. It should be noted that... Figure 8 The horizontal axis represents wavelength in nm, the vertical axis represents photoluminescence intensity in au, and curve G11 represents the photoluminescence intensity distribution of light emitted by the green sub-pixel G in the display panel 10 within a specific wavelength range.

[0084] The wavelength range of light emitted by the green sub-pixel G within the display panel 10 can be greater than 510nm and less than or equal to 540nm.

[0085] The full width at half maximum (FWHM) of the light emitted by the green subpixel G can be less than 50 nm. Alternatively, the FWHM of the light emitted by the green subpixel G can be less than 30 nm.

[0086] For example, such as Figure 9 As shown, Figure 9 This is a light emission spectrum diagram of the first blue sub-pixel B1 within the display panel 10 according to some embodiments. It should be noted that... Figure 9 The horizontal axis represents wavelength in nm, the vertical axis represents photoluminescence intensity in au, and curve B11 represents the photoluminescence intensity distribution of light emitted by the first blue sub-pixel B1 within the display panel 10 within a specific wavelength range.

[0087] The wavelength range of light emitted by the first blue sub-pixel B1 within the display panel 10 can be greater than or equal to 470nm and less than or equal to 510nm.

[0088] The full width at half maximum (FWHM) of the light emitted by the first blue sub-pixel B1 can be less than 50 nm. Alternatively, the FWHM of the light emitted by the first blue sub-pixel B1 can be less than 30 nm.

[0089] For example, such as Figure 10 As shown, Figure 10 This is a light emission spectrum diagram of the second blue sub-pixel B2 within the display panel 10 according to some embodiments. It should be noted that... Figure 10 The horizontal axis represents wavelength in nm, the vertical axis represents photoluminescence intensity in au, and curve B21 represents the photoluminescence intensity distribution of light emitted by the second blue sub-pixel B2 within the display panel 10 within a specific wavelength range.

[0090] The wavelength range of light emitted by the second blue sub-pixel B2 within the display panel 10 can be greater than or equal to 440nm and less than 470nm.

[0091] The full width at half maximum (FWHM) of the light emitted by the second blue sub-pixel B2 can be less than 50 nm. Alternatively, the FWHM of the light emitted by the second blue sub-pixel B2 can be less than 30 nm.

[0092] For example, please continue reading Figure 3 In the case where the multiple sub-pixels F within the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, the display panel 10 may include multiple rows of first pixel rows N1. Each row of first pixel rows N1 may include red sub-pixels R, green sub-pixels G, first blue sub-pixels B1, and second blue sub-pixels B2 arranged alternately along a first direction X.

[0093] The multiple rows of first pixel rows N1 in the display panel can be arranged at intervals along the second direction Y, and the second direction Y intersects with the first direction X.

[0094] Alternatively, please continue reading Figure 4 In the case where the multiple sub-pixels F in the display panel 10 include red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2, the display panel 10 may include a second pixel row N2, a third pixel row N3 and a fourth pixel row N4.

[0095] The second pixel row N2 within the display panel 10 may include multiple red sub-pixels R and multiple second blue sub-pixels B2, with the red sub-pixels R and the second blue sub-pixels B2 arranged alternately along the first direction X.

[0096] The third pixel row N3 within the display panel 10 may include multiple red sub-pixels R and multiple first blue sub-pixels B1, arranged alternately along the first direction X. The third pixel row N3 and the second pixel row N2 may be arranged alternately along the second direction Y, which intersects the first direction X.

[0097] The fourth pixel row N4 within the display panel 10 may include a plurality of green sub-pixels G arranged at intervals along the first direction X. The fourth pixel row N4 may be located between the adjacent second pixel row N2 and third pixel row N3.

[0098] Specifically, along the second direction Y, the first blue sub-pixel B1 in the third pixel row N3 can be positioned opposite to the red sub-pixel R in the second pixel row N2, and the red sub-pixel R in the third pixel row N3 can be positioned opposite to the second blue sub-pixel B2 in the second pixel row N2. The green sub-pixel G in the fourth pixel row N4 can correspond to the gap area between the red sub-pixel R and the second blue sub-pixel B2 in the second pixel row N2 along the second direction Y.

[0099] Alternatively, please continue reading Figure 5 In the case where the multiple sub-pixels F in the display panel 10 include red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2, the display panel 10 may include a fifth pixel row N5, a sixth pixel row N6 and a seventh pixel row N7.

[0100] The fifth pixel row N5 within the display panel 10 may include multiple green sub-pixels G and multiple first blue sub-pixels B1, with the green sub-pixels G and the first blue sub-pixels B1 arranged alternately along the first direction X.

[0101] The sixth pixel row N6 within the display panel 10 may include multiple green sub-pixels G and multiple second blue sub-pixels B2, arranged alternately along the first direction X. The sixth pixel row N6 and the fifth pixel row N5 may be arranged alternately along the second direction Y, which intersects the first direction X.

[0102] The seventh pixel row N7 within the display panel 10 may include a plurality of red sub-pixels R spaced apart along the first direction X. The seventh pixel row N7 may be located between the adjacent fifth pixel row N5 and sixth pixel row N6.

[0103] Along the second direction Y, the green sub-pixel G in the fifth pixel row N5 can be positioned relative to the second blue sub-pixel B2 in the sixth pixel row N6 and the red sub-pixel R in the seventh pixel row N7. The first blue sub-pixel B1 in the fifth pixel row N5 can be positioned relative to the green sub-pixel G in the sixth pixel row N6 and the red sub-pixel R in the seventh pixel row N7.

[0104] The film structure of the aforementioned sub-pixel F will be described in detail below.

[0105] In some embodiments, such as Figure 11 and Figure 12 As shown, Figure 11 and Figure 12 These are structural diagrams of sub-pixels F within a display panel 10 according to some embodiments. At least one of the plurality of sub-pixels F within the display panel 10 may include a light-emitting layer 1.

[0106] For example, please continue reading Figure 11 and Figure 12 In the case where the plurality of sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1 and a second blue sub-pixel B2, at least one of the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1 and the second blue sub-pixel B2 may include a light-emitting layer 1.

[0107] For example, please continue reading Figure 11and Figure 12 The red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2 can all include the light-emitting layer 1.

[0108] For example, the material of the light-emitting layer 1 within the sub-pixel F may include quantum dots.

[0109] It is understood that when the material of the light-emitting layer 1 in the sub-pixel F includes quantum dots, the display panel 10 including the sub-pixel F can be a quantum dot electroluminescent display panel or a quantum dot photoluminescent display panel, etc., and the display device 100 including the display panel 10 can be a quantum dot electroluminescent display device or a quantum dot photoluminescent display device, etc.

[0110] For example, if the material of the light-emitting layer 1 in the sub-pixel F includes quantum dots, the material of the light-emitting layer 1 in the sub-pixel F may include cadmium-free quantum dots or cadmium-based quantum dots.

[0111] In the case where multiple sub-pixels F within the display panel 10 include a red sub-pixel R, and the material of the light-emitting layer 1 within the red sub-pixel R comprises cadmium-free quantum dots, the material of the light-emitting layer 1 within the red sub-pixel R may include indium phosphide red quantum dot material (e.g., In...). x P x Zn y Se z S y-z x <y,0≤z≤y)。

[0112] In the case where multiple sub-pixels F within the display panel 10 include a red sub-pixel R, and the material of the light-emitting layer 1 within the red sub-pixel R includes cadmium-based quantum dots, the material of the light-emitting layer 1 within the red sub-pixel R may include a cadmium-based red quantum dot material (e.g., Cd). x Zn 1-x Se y S 1-y 0 <x<1,0<y<1)。

[0113] In the case where multiple sub-pixels F within the display panel 10 include green sub-pixels G, and the material of the light-emitting layer 1 within the green sub-pixel G comprises cadmium-free quantum dots, the material of the light-emitting layer 1 within the green sub-pixel G may include indium phosphide green quantum dot material (e.g., In...). x P x Zn y Se z S y-z x <y,0≤z≤y)。

[0114] When multiple sub-pixels F in the display panel 10 include a green sub-pixel G, and the material of the light-emitting layer 1 in the green sub-pixel G includes cadmium-based quantum dots, the material of the light-emitting layer 1 in the green sub-pixel G may include a cadmium-based green quantum dot material (e.g., Cd x Zn 1-x Se y S 1-y , 0 < x < 1, 0 < y < 1).

[0115] When multiple sub-pixels F in the display panel 10 include a first blue sub-pixel B1, and the material of the light-emitting layer 1 in the first blue sub-pixel B1 includes cadmium-free quantum dots, the material of the light-emitting layer 1 in the first blue sub-pixel B1 may include an indium phosphide cyan quantum dot material (e.g., In x P x Zn y Se z S y-z , x < y, 0 ≤ z ≤ y) and a zinc selenium telluride cyan quantum dot material (e.g., ZnTe x Se y S 1-x-y , x < y, x + y < 1), etc., at least one of them.

[0116] When multiple sub-pixels F in the display panel​​​​​​​​​​​​​​​​​​​​​​​​​​​​​In the case where a plurality of sub-pixels F within the display panel 10 include a second blue sub-pixel B2, and the material of the light-emitting layer 1 within the second blue sub-pixel B2 includes cadmium-based quantum dots, the material of the light-emitting layer 1 within the second blue sub-pixel B2 may include a cadmium-based blue quantum dot material (e.g., Cd). x Zn 1-x Se y S 1-y 0 <x<1,0<y<1)。

[0119] In the case where the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, the materials of the light-emitting layer 1 of the red sub-pixel R, the light-emitting layer 1 of the green sub-pixel G, the light-emitting layer 1 of the first blue sub-pixel B1, and the light-emitting layer 1 of the second blue sub-pixel B2 can all include cadmium-free quantum dots.

[0120] Alternatively, the materials of the light-emitting layer 1 of the red sub-pixel R, the light-emitting layer 1 of the green sub-pixel G, the light-emitting layer 1 of the first blue sub-pixel B1, and the light-emitting layer 1 of the second blue sub-pixel B2 may all include cadmium-based quantum dots.

[0121] Alternatively, the materials of the light-emitting layer 1 of the red sub-pixel R and the light-emitting layer 1 of the green sub-pixel G can both include cadmium-free quantum dots, and the materials of the light-emitting layer 1 of the first blue sub-pixel B1 and the light-emitting layer 1 of the second blue sub-pixel B2 can both include cadmium-based quantum dots.

[0122] The luminous efficiency of subpixel F is generally higher when the material of the light-emitting layer 1 of subpixel F includes cadmium-based quantum dots than when the material of the light-emitting layer 1 of subpixel F includes cadmium-free quantum dots. The luminous efficiency of red subpixel R and green subpixel G in display panel 10 is generally higher than that of first blue subpixel B1 and second blue subpixel B2. By making the materials of the light-emitting layer 1 of red subpixel R and green subpixel G both include cadmium-free quantum dots, and the materials of the light-emitting layer 1 of first blue subpixel B1 and second blue subpixel B2 both include cadmium-based quantum dots, on the one hand, it is beneficial to improve the luminous efficiency of first blue subpixel B1 and second blue subpixel B2, thereby reducing the driving current of first blue subpixel B1 and second blue subpixel B2, reducing energy consumption, and thus improving the overall energy efficiency of display panel 10.

[0123] On the other hand, the narrow emission spectrum and high color purity of cadmium-based quantum dots can improve the color performance of the first blue sub-pixel B1 and the second blue sub-pixel B2, making the colors of the first blue sub-pixel B1 and the second blue sub-pixel B2 more matched with the colors of the red sub-pixel R and the green sub-pixel G, which is beneficial to improving the color consistency of the picture displayed on the display panel 10.

[0124] For example, the light-emitting layer 1 in the sub-pixel F can be prepared by at least one of the following processes: spin coating, vapor deposition, inkjet printing, transfer printing, and photolithography.

[0125] In some embodiments, please continue reading Figure 11 and Figure 12 The sub-pixel F within the display panel 10 may also include a hole transport layer (HTL). The hole transport layer HTL may be located on one side of the light-emitting layer 1 within the sub-pixel F.

[0126] For example, when the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, the materials of the hole transport layer HTL of the red sub-pixel R, the hole transport layer HTL of the green sub-pixel G, the hole transport layer HTL of the first blue sub-pixel B1, and the hole transport layer HTL of the second blue sub-pixel B2 can be the same.

[0127] Alternatively, the material of the hole transport layer HTL of at least one of the red sub-pixels R and green sub-pixels G may be different from the material of the hole transport layer HTL of at least one of the first blue sub-pixels B1 and the second blue sub-pixels B2.

[0128] For example, the material of the hole transport layer HTL of subpixel F may include at least one of TFB (Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4'-(N-(4-sec-butylphenyl)diphenylamine)]) and PF8CZ (Poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-(9-(2-ethylhexyl)-carbazole-3,6-diyl)]).

[0129] For example, the material of the hole transport layer HTL of subpixel F may include TFB.

[0130] For example, the material of the hole transport layer HTL of sub-pixel F may include PF8CZ.

[0131] For example, the material of the hole transport layer HTL of subpixel F may include TFB and PF8CZ.

[0132] In the case where the multiple sub-pixels F within the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, the materials of the hole transport layer HTL of the red sub-pixel R, the hole transport layer HTL of the green sub-pixel G, the hole transport layer HTL of the first blue sub-pixel B1, and the hole transport layer HTL of the second blue sub-pixel B2 may all include TFB.

[0133] Alternatively, the materials of the hole transport layer HTL of the red sub-pixel R, the hole transport layer HTL of the green sub-pixel G, the hole transport layer HTL of the first blue sub-pixel B1, and the hole transport layer HTL of the second blue sub-pixel B2 may all include PF8CZ.

[0134] Alternatively, the material of the hole transport layer HTL of at least one of the red sub-pixels R and green sub-pixels G may include TFB, and the material of the hole transport layer HTL of at least one of the first blue sub-pixels B1 and the second blue sub-pixels B2 may include PF8CZ.

[0135] For example, the materials of the hole transport layer HTL of the red sub-pixel R and the hole transport layer HTL of the green sub-pixel G can both include TFB, and the materials of the hole transport layer HTL of the first blue sub-pixel B1 and the hole transport layer HTL of the second blue sub-pixel B2 can both include PF8CZ.

[0136] By making the materials of the hole transport layer HTL of the red sub-pixel R and the hole transport layer HTL of the green sub-pixel G both include TFB, the hole transport requirements of the red sub-pixel R and the green sub-pixel G can be met. By making the materials of the hole transport layer HTL of the first blue sub-pixel B1 and the hole transport layer HTL of the second blue sub-pixel B2 both include PF8CZ, on the one hand, it is beneficial to improve the hole transport efficiency of the first blue sub-pixel B1 and the second blue sub-pixel B2, which in turn is beneficial to improve the luminous efficiency of the first blue sub-pixel B1 and the second blue sub-pixel B2, thereby reducing the driving current of the first blue sub-pixel B1 and the second blue sub-pixel B2 and improving the overall energy efficiency of the display panel 10.

[0137] On the other hand, it helps to achieve a balance in luminous efficiency among the red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2, thereby improving the color uniformity of the image displayed on the display panel 10.

[0138] For example, the material of the hole transport layer HTL of sub-pixel F may also include at least one of PVK (polyvinylcarbazole), TPD (N,N'-bis(3-methylphenyl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine) and CBP (4,4'-bis(9-carbazole)biphenyl).

[0139] For example, the hole transport layer HTL of subpixel F can be prepared by at least one of the following processes: spin coating, vapor deposition, and inkjet printing.

[0140] In some embodiments, please continue reading Figure 11 and Figure 12 The sub-pixel F within the display panel 10 may also include an electron transport layer (ETL). The electron transport layer ETL may be located on one side of the light-emitting layer 1 within the sub-pixel F.

[0141] For example, please continue reading Figure 11 and Figure 12 When a sub-pixel F within the display panel 10 includes a hole transport layer HTL, and the hole transport layer HTL is located on one side of the light-emitting layer 1 within the sub-pixel F, the electron transport layer ETL can be located on the side of the light-emitting layer 1 away from the hole transport layer HTL. That is, the light-emitting layer 1 is located between the hole transport layer HTL and the electron transport layer ETL.

[0142] For example, the material of the electron transport layer ETL of the sub-pixel F may include at least one of the following: aluminum oxide (Al2O3), barium fluoride (BaF2), titanium dioxide (TiO2), zinc sulfide (ZnS), zirconium oxide (ZrO2), zinc selenide (ZnSe), magnesium oxide (MgO), zinc oxide (ZnO), yttrium oxide (Y2O3), and aluminum fluoride (AlF3).

[0143] For example, the material of the electron transport layer (ETL) of subpixel F may include zinc oxide nanoparticle films or zinc oxide sol-gel films.

[0144] For example, the material of the electron transport layer (ETL) of sub-pixel F may include magnesium (Mg).

[0145] For example, the material of the electron transport layer (ETL) of sub-pixel F may include ZnMgO.

[0146] For example, the plurality of sub-pixels F within the display panel 10 may include a first target sub-pixel and a second target sub-pixel, wherein the wavelength of light emitted by the first target sub-pixel is greater than the wavelength of light emitted by the second target sub-pixel.

[0147] For example, if the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, the first target sub-pixel can be the red sub-pixel R, and the second target sub-pixel can be one of the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2.

[0148] For example, if the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, then the first target sub-pixel can be the green sub-pixel G, and the second target sub-pixel can be one of the first blue sub-pixel B1 and the second blue sub-pixel B2.

[0149] For example, if the multiple sub-pixels F in the display panel 10 include a red sub-pixel R, a green sub-pixel G, a first blue sub-pixel B1, and a second blue sub-pixel B2, then the first target sub-pixel can be the first blue sub-pixel B1, and the second target sub-pixel can be the second blue sub-pixel B2.

[0150] The magnesium content in the electron transport layer (ETL) material of the first target sub-pixel can be greater than or equal to the magnesium content in the electron transport layer (ETL) material of the second target sub-pixel F. That is, the magnesium content in the electron transport layer (ETL) material of the first target sub-pixel within the display panel 10 can be the same as the magnesium content in the electron transport layer (ETL) material of the second target sub-pixel F. Alternatively, as the wavelength of light emitted by sub-pixel F increases, the magnesium content in the electron transport layer (ETL) material of sub-pixel F increases; as the wavelength of light emitted by sub-pixel F decreases, the magnesium content in the electron transport layer (ETL) material of sub-pixel F decreases.

[0151] In other words, when the multiple sub-pixels F in the display panel 10 include red sub-pixels R, green sub-pixels G, first blue sub-pixels B1 and second blue sub-pixels B2, the magnesium content in the electron transport layer ETL material of red sub-pixels R, the magnesium content in the electron transport layer ETL material of green sub-pixels G, the magnesium content in the electron transport layer ETL material of first blue sub-pixels B1 and the magnesium content in the electron transport layer ETL material of second blue sub-pixels B2 can decrease sequentially.

[0152] By sequentially decreasing the magnesium content in the electron transport layer (ETL) of the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2, the magnesium content in these materials can be optimized. This balances the electron injection and hole injection within the red sub-pixel R, green sub-pixel G, first blue sub-pixel B1, and second blue sub-pixel B2, thereby improving the luminous efficiency of the first blue sub-pixel B1 and second blue sub-pixel B2, and ultimately enhancing the performance of the display panel 10.

[0153] For example, the electron transport layer (ETL) of subpixel F can be prepared by at least one of the following processes: spin coating, vapor deposition, and inkjet printing.

[0154] In some embodiments, please continue reading Figure 11 and Figure 12 The sub-pixel F within the display panel 10 may also include a hole injection layer (HIL).

[0155] For example, in the case where the sub-pixel F in the display panel 10 includes an emissive layer 1 and a hole transport layer HTL, the hole injection layer HIL may be located on the side of the hole transport layer HTL away from the emissive layer 1.

[0156] For example, the material of the hole injection layer HIL of sub-pixel F may include at least one of PEDOT:PSS 4083 (poly(3,4-ethylenedioxythiophene) / polystyrene sulfonate), NiO, MoO3, WoO3, V2O5, CuO, CuS, CuSCN, Cu:NiO, etc.

[0157] When the material of the hole injection layer HIL of sub-pixel F includes PEDOT, the film formation temperature of PEDOT can be greater than or equal to 130°C and less than or equal to 150°C, and the spin coater speed during film formation can be set to greater than or equal to 500 rpm and less than or equal to 2500 rpm to adjust the thickness of the hole injection layer HIL.

[0158] For example, the hole injection layer HIL of sub-pixel F can be prepared by at least one of the following processes: spin coating, vapor deposition, and inkjet printing.

[0159] In some embodiments, please continue reading Figure 11 and Figure 12 The sub-pixel F within the display panel 10 may also include a first electrode 21 and a second electrode 22.

[0160] For example, one of the first electrode 21 and the second electrode 22 can serve as the anode of the sub-pixel F, and the other can serve as the cathode of the sub-pixel F.

[0161] For example, the first electrode 21 can serve as the anode of the sub-pixel F. The first electrode 21 is configured to inject holes into the light-emitting layer 1. The second electrode 22 can serve as the cathode of the sub-pixel F. The second electrode 22 is configured to inject electrons into the light-emitting layer 1.

[0162] The following describes some embodiments of this disclosure using the first electrode 21 as the anode of sub-pixel F and the second electrode 22 as the cathode of sub-pixel F as an example.

[0163] For example, the material used to form the first electrode 21 may include a metallic material, such as any one or more of magnesium (Mg), silver (Ag), copper (Cu), aluminum (Al), titanium (Ti), and molybdenum (Mo).

[0164] The material used to form the first electrode 21 may also include alloys of the aforementioned metallic materials, such as aluminum-neodymium alloy (AlNd) or molybdenum-niobium alloy (MoNb).

[0165] For example, the material used to form the second electrode 22 may include any one or more of magnesium (Mg), silver (Ag), aluminum (Al), etc.

[0166] The material used to form the second electrode 22 may also include any one or more alloys made of magnesium (Mg), silver (Ag), aluminum (Al), etc.

[0167] The material used to form the second electrode 22 may also include a transparent conductive material. For example, one or more of indium tin oxide (ITO), indium zinc oxide (IZO), and fluorine-doped tin oxide (FTO).

[0168] In some embodiments, please continue reading Figure 11 and Figure 12 The display panel 10 may include a substrate S, and a plurality of sub-pixels F within the display panel 10 may be located on the same side of the substrate S.

[0169] Please continue reading. Figure 11In the case where the sub-pixel F includes a first electrode 21, a hole transport layer HTL, an electron transport layer ETL, and a second electrode 22 stacked sequentially along the thickness direction (i.e., the third direction Z) of the substrate S, the first electrode 21 of the sub-pixel F can be closer to the substrate S than the second electrode 22.

[0170] Alternatively, please continue reading Figure 12 In the case where the sub-pixel F includes a first electrode 21, a hole transport layer HTL, an electron transport layer ETL, and a second electrode 22 stacked sequentially along the thickness direction (i.e., the third direction Z) of the substrate S, the second electrode 22 of the sub-pixel F can be closer to the substrate S than the first electrode 21.

[0171] For example, please continue reading Figure 11 In the case where multiple sub-pixels F in the display panel 10 include red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2, the first electrodes 21 of red sub-pixel R, green sub-pixel G, first blue sub-pixel B1 and second blue sub-pixel B2 can all be closer to the substrate S than the second electrode 22.

[0172] Alternatively, please continue reading Figure 12 The second electrodes 22 of the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1, and the second blue sub-pixel B2 can all be closer to the substrate S than the first electrode 21.

[0173] Alternatively, please continue reading Figure 11 and Figure 12 The first electrode 21 of the red sub-pixel F and the green sub-pixel F can be closer to the substrate S than the second electrode 22, and the second electrode 22 of the first blue sub-pixel B1 and the second blue sub-pixel B2 can be closer to the substrate S than the first electrode 21.

[0174] By bringing the first electrode 21 of the red sub-pixel F and the green sub-pixel F closer to the substrate S than the second electrode 22, and the second electrode 22 of the first blue sub-pixel B1 and the second blue sub-pixel B2 closer to the substrate S than the first electrode 21, it is beneficial to balance the stability of the red sub-pixel R, the green sub-pixel G, the first blue sub-pixel B1 and the second blue sub-pixel B2, thereby improving the overall stability of the display panel 10 and extending its lifespan.

[0175] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A display panel, characterized in that, It includes multiple sub-pixels, including a red sub-pixel, a green sub-pixel, a first blue sub-pixel, and a second blue sub-pixel; the peak wavelength of the light emitted by the first blue sub-pixel is greater than the peak wavelength of the light emitted by the second blue sub-pixel; Wherein, at least one of the plurality of sub-pixels includes a light-emitting layer, and the material of the light-emitting layer includes quantum dots.

2. The display panel according to claim 1, characterized in that, The materials of the light-emitting layer of the red sub-pixel and the light-emitting layer of the green sub-pixel both include cadmium-free quantum dots, while the materials of the light-emitting layer of the first blue sub-pixel and the light-emitting layer of the second blue sub-pixel both include cadmium-based quantum dots.

3. The display panel according to claim 1, characterized in that, The sub-pixel also includes a hole transport layer located on one side of the light-emitting layer; The material of the hole transport layer of at least one of the red sub-pixels and the green sub-pixels is different from the material of the hole transport layer of at least one of the first blue sub-pixels and the second blue sub-pixels.

4. The display panel according to claim 3, characterized in that, The materials of the hole transport layer of the red sub-pixel and the hole transport layer of the green sub-pixel both include TFB, and the materials of the hole transport layer of the first blue sub-pixel and the hole transport layer of the second blue sub-pixel both include PF8CZ.

5. The display panel according to claim 1, characterized in that, The sub-pixel includes an electron transport layer located on one side of the light-emitting layer; the material of the electron transport layer includes magnesium. The plurality of sub-pixels includes a first target sub-pixel and a second target sub-pixel; the wavelength of light emitted by the first target sub-pixel is greater than the wavelength of light emitted by the second target sub-pixel, and the magnesium content in the electron transport layer material of the first target sub-pixel is greater than or equal to the magnesium content in the electron transport layer material of the second target sub-pixel.

6. The display panel according to claim 1, characterized in that, The display panel also includes a substrate, and the plurality of sub-pixels are located on the same side of the substrate; The sub-pixel further includes a first electrode, a hole transport layer, an electron transport layer, and a second electrode, which are sequentially stacked along the thickness direction of the substrate, and the light-emitting layer is located between the hole transport layer and the electron transport layer; In this configuration, the first electrode of the red sub-pixel and the green sub-pixel is closer to the substrate than the second electrode, and the second electrode of the first blue sub-pixel and the second blue sub-pixel is closer to the substrate than the first electrode.

7. The display panel according to any one of claims 1-6, characterized in that, The difference between the wavelength of light emitted by the first blue sub-pixel and the wavelength of light emitted by the second blue sub-pixel is greater than or equal to 1 nm and less than or equal to 70 nm.

8. The display panel according to any one of claims 1-6, characterized in that, The wavelength of the light emitted by the first blue sub-pixel is greater than or equal to 470nm and less than or equal to 510nm.

9. The display panel according to claim 8, characterized in that, The wavelength of the light emitted by the second blue sub-pixel is greater than or equal to 440nm and less than 470nm.

10. The display panel according to any one of claims 1-6, characterized in that, The display panel includes multiple rows of first pixel rows, and each row of first pixel rows includes red sub-pixels, green sub-pixels, first blue sub-pixels and second blue sub-pixels arranged alternately along a first direction; The multiple rows of first pixels are arranged at intervals along a second direction, and the second direction intersects the first direction.

11. The display panel according to any one of claims 1-6, characterized in that, The display panel also includes: The second pixel row includes multiple red sub-pixels and multiple second blue sub-pixels, and the red sub-pixels and second blue sub-pixels are arranged alternately along the first direction. The third pixel row includes multiple red sub-pixels and multiple first blue sub-pixels, which are arranged alternately along a first direction; the third pixel row and the second pixel row are arranged alternately along a second direction, which intersects the first direction. The fourth pixel row includes a plurality of green sub-pixels spaced apart along the first direction; the fourth pixel row is located between the adjacent second pixel row and the third pixel row; Wherein, along the second direction, the first blue sub-pixel in the third pixel row and the red sub-pixel in the second pixel row are arranged opposite to each other, and the red sub-pixel in the third pixel row and the second blue sub-pixel in the second pixel row are arranged opposite to each other; The green sub-pixel corresponds in the second direction to the gap area between the red sub-pixel and the second blue sub-pixel in the second pixel row.

12. The display panel according to any one of claims 1-6, characterized in that, The display panel also includes: The fifth pixel row includes multiple green sub-pixels and multiple first blue sub-pixels, and the green sub-pixels and the first blue sub-pixels are arranged alternately along the first direction; The sixth pixel row includes multiple green sub-pixels and multiple second blue sub-pixels, which are arranged alternately along the first direction; the sixth pixel row and the fifth pixel row are arranged alternately along the second direction, which intersects the first direction; The seventh pixel row includes a plurality of red sub-pixels spaced apart along the first direction; the seventh pixel row is located between the adjacent fifth pixel row and the sixth pixel row; Wherein, along the second direction, the green sub-pixel in the fifth pixel row, the second blue sub-pixel in the sixth pixel row, and the red sub-pixel in the seventh pixel row are arranged opposite each other, and the first blue sub-pixel in the fifth pixel row, the green sub-pixel in the sixth pixel row, and the red sub-pixel in the seventh pixel row are arranged opposite each other.

13. A display device, characterized in that, include: The display panel as described in any one of claims 1 to 12; The circuit board is electrically connected to the display panel.

Images