Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display substrate comprises a substrate; the first electrode is positioned on the substrate; the first light-emitting layer is positioned on one side, far away from the substrate, of the first electrode; the first hole blocking layer is positioned on one side, far away from the substrate, of the first light-emitting layer; the first electron transport layer is positioned on one side, far away from the substrate, of the first hole barrier layer; the electron injection layer is positioned on one side, far away from the substrate, of the first electron transmission layer; the second electrode is positioned on one side, far away from the substrate, of the electron injection layer; the optical extraction layer is positioned on one side, far away from the substrate, of the second electrode; the protection layer is positioned on one side, far away from the substrate, of the optical extraction layer; the packaging layer is located on the side, away from the substrate, of the protection layer, the refractive index of the material of the optical extraction layer is larger than that of the material of the packaging layer, and the refractive index of the material of the packaging layer is larger than that of the material of the second electrode.

Description

Display substrate and display device Technical Field

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

[0002] Organic Light-Emitting Diode (OLED) displays have a variety of pixel components, but full-color devices based on RGB sub-pixels are currently the mainstream. When monitoring the uniformity of medium- and large-sized OLED displays, a certain degree of color shift (color margin) will generally occur at different locations at specific angles. This difference in color variation can directly affect the user's viewing experience.

[0003] The above information disclosed in this section is only for understanding the background of the technical concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art.

[0004] Summary of the Invention

[0005] In order to solve at least one aspect of the above problems, embodiments of the present disclosure provide a display substrate and a display device including the display substrate.

[0006] According to one aspect of the present disclosure, a display substrate is provided, characterized in that it includes: a base substrate; a first electrode located on the base substrate; a first light-emitting layer located on a side of the first electrode away from the base substrate; a first hole blocking layer located on a side of the first light-emitting layer away from the base substrate; a first electron transport layer located on a side of the first hole blocking layer away from the base substrate; an electron injection layer located on a side of the first electron transport layer away from the base substrate; a second electrode located on a side of the electron injection layer away from the base substrate; an optical extraction layer located on a side of the second electrode away from the base substrate; a protective layer located on a side of the optical extraction layer away from the base substrate; and an encapsulation layer located on a side of the protective layer away from the base substrate, wherein the encapsulation layer includes multiple layers; wherein the refractive index of the material of the optical extraction layer is greater than the refractive index of the material of at least one layer of the encapsulation layer, and the refractive index of the material of at least one layer of the encapsulation layer is greater than the refractive index of the material of the second electrode.

[0007] According to some exemplary embodiments, the display substrate includes a color deviation adjustment layer, the color deviation adjustment layer is selected from at least one layer of the encapsulation layer, the optical extraction layer, the protective layer, and at least one of the second electrode, and the color deviation adjustment layer and the remaining film layers of the display substrate other than the color deviation adjustment layer satisfy the following relationship: s Ls +∑n i L i / (n1+∑n i )=T,

[0008] Among them, n s represents the refractive index of the material of the color shift adjustment layer, L s represents the thickness of the color deviation adjustment layer, n i represents the refractive index of the material of the remaining film layers, L i represents the thickness of the remaining film layers, i is a positive integer, and T ranges from 45 to 95.

[0009] According to some exemplary embodiments, the light-emitting layer includes three sub-pixels: R, G, and B, wherein the R sub-pixel is the first sub-light-emitting layer, the G sub-pixel is the second sub-light-emitting layer, and the B sub-pixel is the third sub-light-emitting layer.

[0010] According to some exemplary embodiments, the encapsulation layer includes: a first intercalation layer located on a side of the protective layer away from the base substrate; a first inorganic layer located on a side of the first intercalation layer away from the base substrate; an organic layer located on a side of the first inorganic layer away from the base substrate; and a second inorganic layer located on a side of the organic layer away from the base substrate.

[0011] According to some exemplary embodiments, the refractive index n of the material of the first intercalation layer is s1 , the thickness L of the first intercalation layer s1 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s1 L s1 +∑n i L i / (n s1 +∑n i )=T,

[0012] Among them, the range of T is 65 to 95.

[0013] According to some exemplary embodiments, the refractive index n of the material of the first intercalation layer is s1 The product of the thickness L1 of the first intercalation layer n s1 ·L s1 The range is 70 to 230.

[0014] According to some exemplary embodiments, the refractive index n of the material of the first intercalation layer is s1 Between 1.5 and 1.7.

[0015] According to some exemplary embodiments, the refractive index n of the material of the first intercalation layer iss1 The refractive index n of the material of the protective layer 保护层 Between satisfies |n s1 -n 保护层 ∣>0.3.

[0016] According to some exemplary embodiments, the peak range of the first sub-light emitting layer is 625nm-640nm, the peak range of the second sub-light emitting layer is 520nm-535nm, and the peak range of the third sub-light emitting layer is 455nm-465nm.

[0017] According to some exemplary embodiments, the encapsulation layer includes: a first inorganic layer located on a side of the protective layer away from the base substrate; an organic layer located on a side of the first inorganic layer away from the base substrate; and a second inorganic layer located on a side of the organic layer away from the base substrate.

[0018] According to some exemplary embodiments, the refractive index n of the material of the optical extraction layer is s2 , the thickness L of the optical extraction layer s2 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s2 L s2 +∑n i L i / (n s2 +∑n i )=T,

[0019] Among them, the range of T is 45 to 55.

[0020] According to some exemplary embodiments, the refractive index n of the material of the optical extraction layer is s2 The thickness L of the optical extraction layer s2 The product n s2 ·L s2 The range is 90 to 150.

[0021] According to some exemplary embodiments, the refractive index n of the material of the optical extraction layer is s2 Between 1.8 and 2.2.

[0022] According to some exemplary embodiments, the refractive index n of the material of the optical extraction layer is s2 The refractive index n of the material of the protective layer 保护层 Between satisfies |n s2 -n 保护层 ∣>0.5.

[0023] According to some exemplary embodiments, the peak range of the first sub-light emitting layer is 633 nm to 654 nm, the peak range of the second sub-light emitting layer is 515 nm to 530 nm, and the peak range of the third sub-light emitting layer is 455 nm to 465 nm.

[0024] According to some exemplary embodiments, the refractive index n of the material of the protective layer is s3 , the thickness L of the protective layer s3 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s3 L s3 +∑n i L i / (n s3 +∑n i )=T,

[0025] Among them, the range of T is 55 to 65.

[0026] According to some exemplary embodiments, the refractive index n of the material of the protective layer is s3 The thickness of the protective layer L s3 The product n s3 ·L s3 The range is 50 to 110.

[0027] According to some exemplary embodiments, the refractive index n of the material of the protective layer is s3 Between 1.3 and 1.5.

[0028] According to some exemplary embodiments, the refractive index n of the material of the protective layer is s3 The refractive index n of the material of the optical extraction layer 光学取出层 Satisfy between |n s3 -n 光学取出层 ∣>0.5.

[0029] According to some exemplary embodiments, the peak range of the first sub-light emitting layer is 615 nm to 630 nm, the peak range of the second sub-light emitting layer is 515 nm to 530 nm, and the peak range of the third sub-light emitting layer is 450 nm to 465 nm.

[0030] According to some exemplary embodiments, the refractive index n of the material of the second electrode is s4 , the thickness L of the second electrode s4 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s4 Ls4 +∑n i L i / (n s4 +∑n i )=T,

[0031] Among them, the range of T is 60~65.

[0032] According to some exemplary embodiments, the refractive index n of the material of the second electrode is s4 The thickness L of the second electrode s4 The product n s4 ·L s4 The range is 1.5 to 2.0.

[0033] According to some exemplary embodiments, the refractive index n of the material of the second electrode is s4 Between 0.1 and 0.2.

[0034] According to some exemplary embodiments, the refractive index n of the material of the second electrode is s4 The refractive index n of the material of the optical extraction layer 光学取出层 Between satisfies |n s4 -n 光学取出层 ∣>1.

[0035] According to some exemplary embodiments, the peak range of the first sub-light emitting layer is 615 nm to 625 nm, the peak range of the second sub-light emitting layer is 520 nm to 530 nm, and the peak range of the third sub-light emitting layer is 455 nm to 465 nm.

[0036] According to some exemplary embodiments, the encapsulation layer includes: a first inorganic layer located on a side of the protective layer away from the base substrate; a second intercalation layer located on a side of the first inorganic layer away from the base substrate; an organic layer located on a side of the second intercalation layer away from the base substrate; and a second inorganic layer located on a side of the organic layer away from the base substrate.

[0037] According to some exemplary embodiments, the refractive index n of the material of the second intercalation layer is s5 , the thickness of the second intercalation layer L s5 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s5 L s5 +∑n i L i / (n s5 +∑n i )=T,

[0038] Among them, the range of T is 65 to 95.

[0039] According to some exemplary embodiments, the refractive index n of the material of the second intercalation layer is s5 The thickness of the protective layer L s5 The product n s5 ·L s5 The range is 80 to 160.

[0040] According to some exemplary embodiments, the refractive index n of the material of the second intercalation layer is s5 Between 1.5 and 1.7.

[0041] According to some exemplary embodiments, the refractive index n of the material of the second intercalation layer is s5 The refractive index n of the material of the first inorganic layer 第一无机层 Between satisfies |n s5 -n 第一无机层 ∣>0.15.

[0042] According to some exemplary embodiments, the peak range of the first sub-light emitting layer is 620 nm to 635 nm, the peak range of the second sub-light emitting layer is 515 nm to 530 nm, and the peak range of the third sub-light emitting layer is 450 nm to 465 nm.

[0043] According to some exemplary embodiments, the above-mentioned display substrate may further include: a hole injection layer located on the side of the first electrode away from the base substrate; a first hole transport layer located on the side of the hole injection layer away from the base substrate; a second light-emitting layer located on the side of the first hole transport layer away from the base substrate; a second hole blocking layer located on the side of the second light-emitting layer away from the base substrate; a second electron transport layer located on the side of the second hole blocking layer away from the base substrate; a charge generation layer located on the side of the second electron transport layer away from the base substrate; and a second hole transport layer located on the side of the charge generation layer away from the base substrate, wherein the first light-emitting layer is located on the side of the second hole transport layer away from the base substrate.

[0044] According to some exemplary embodiments, the material of the first electrode includes at least one of silver, indium tin oxide / silver / indium tin oxide, and nickel-chromium alloy; the material of the second electrode includes at least one of transparent conductive oxide, magnesium-silver alloy, aluminum, magnesium, and silver.

[0045] According to some exemplary embodiments, S drop ≤ 0, and S drop is obtained by: S drop = ((S split - S ref.) / S ref.) * 100%

[0046] Wherein, S split is the color gamut area enclosed by the display substrate in the color space coordinates, S ref. is the color gamut area enclosed by the reference display substrate in the color space coordinates, and S drop is the change of split S relative to S ref.

[0047] In another aspect, a display device is provided, comprising the display substrate as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Other objects and advantages of the present disclosure will become apparent from the following description of the present disclosure with reference to the accompanying drawings, which will help to provide a comprehensive understanding of the present disclosure.

[0049] FIG1A is a schematic diagram of a display substrate according to an embodiment of the present disclosure;

[0050] FIG1B is a schematic diagram of a laminated display substrate according to an embodiment of the present disclosure;

[0051] FIG1C is a schematic diagram of a display substrate including a plurality of first light-emitting layers according to an embodiment of the present disclosure;

[0052] FIG2 is a schematic diagram of an encapsulation layer according to an embodiment of the present disclosure;

[0053] FIG3A is a schematic diagram of the linear relationship of YS drop in the prior art;

[0054] FIG3B is a schematic diagram of the linear relationship of YS drop when the encapsulation layer is as shown in FIG2 according to an embodiment of the present disclosure;

[0055] FIG3C is a trend diagram showing the effect of the thickness of the second electrode on the green spectrum according to an embodiment of the present disclosure;

[0056] FIG4 is a schematic diagram of an encapsulation layer according to another embodiment of the present disclosure;

[0057] FIG5A is a schematic diagram showing a linear relationship of YS drop when the encapsulation layer is as shown in FIG4 according to an embodiment of the present disclosure;

[0058] FIG5B is a trend diagram showing the effect of the thickness of the second electrode on the red spectrum according to an embodiment of the present disclosure;

[0059] FIG6A is a schematic diagram showing a linear relationship of YS drop when the protective layer is a color shift adjustment layer according to an embodiment of the present disclosure;

[0060] FIG6B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure;

[0061] FIG7A is a schematic diagram showing the linear relationship of YS drop when the second electrode is a color shift adjustment layer according to an embodiment of the present disclosure;

[0062] FIG7B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure;

[0063] FIG8 is a schematic diagram of an encapsulation layer according to another embodiment of the present disclosure;

[0064] FIG9A is a schematic diagram showing the linear relationship of YS drop when the encapsulation layer is as shown in FIG8 according to an embodiment of the present disclosure;

[0065] FIG9B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure.

[0066] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of layers, structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0067] The technical solution of the present disclosure is further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present disclosure with reference to the accompanying drawings is intended to explain the overall inventive concept of the present disclosure and should not be construed as limiting the present disclosure.

[0068] Furthermore, in the following detailed description, for ease of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the present disclosure. However, it will be apparent that one or more embodiments can be practiced without these specific details.

[0069] It should be understood that, although the terms first, second, etc. can be used here to describe different elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the exemplary embodiments, the first element can be named as the second element, and similarly, the second element can be named as the first element. As used herein, the term "and / or" includes any combination and all combinations of one or more related listed items.

[0070] It should be understood that when an element or layer is referred to as being "formed on" another element or layer, the element or layer may be formed directly or indirectly on the other element or layer. That is, for example, there may be intermediate elements or intermediate layers. Conversely, when an element or layer is referred to as being "formed directly on" another element or layer, there are no intermediate elements or intermediate layers. Other terms used to describe the relationship between elements or layers (e.g., "between" versus "directly between," "adjacent" versus "directly adjacent," etc.) should be interpreted in a similar manner.

[0071] In this document, unless otherwise specified, the phrase "located on the same layer" generally means that the first component and the second component can be made of the same material and can be formed by the same patterning process. The phrase "A and B are integrally connected" means that component A and component B are integrally formed, that is, they generally include the same material and form a structurally continuous, unitary component.

[0072] Unless otherwise specified, directional terms such as "upper," "lower," "left," "right," "inner," and "outer" are used herein to indicate positions or relationships based on the figures shown. These terms are intended solely to facilitate the description of the present disclosure and are not intended to indicate or imply that the devices, components, or parts referred to must have, be constructed, or operate in a specific orientation. It should be understood that when the absolute positions of the objects being described change, the relative positions they represent may also change accordingly. Therefore, these directional terms should not be construed as limiting the present disclosure.

[0073] In this article, the expressions "vertical", "vertically connected" or similar expressions include not only the case of 90 degrees, that is, the case of complete verticality, but also the case where the difference from 90 degrees is within a certain error range, for example, the case where the difference from 90 degrees is within the process error range.

[0074] Those skilled in the art should understand that, in this article, unless otherwise specified, the expression "height" or "thickness" refers to the dimension of the surface of each film layer arranged perpendicular to the display substrate, that is, the dimension along the light emitting direction of the display substrate, or the dimension along the normal direction of the display device.

[0075] In this document, the directional expressions "first direction" and "second direction" are used to describe different directions along a pixel unit, such as the longitudinal and transverse directions of a pixel unit, or the row and column directions of a sub-pixel arrangement. It should be understood that such expressions are merely exemplary descriptions and are not intended to limit the present disclosure.

[0076] Full-color devices composed of RGB sub-pixel units can be regarded as the current mainstream devices. The difference in the degree of influence of the monochromatic characteristics of RGB on the synthetic white light will lead to the appearance of angular color differences. Therefore, reducing the sensitivity of monochrome to white light with angle is the key to adjusting the color cast of white light. For medium and large-sized OLED displays, when monitoring the uniformity, at a specific angle, there will be a certain color deviation position dispersion (color deviation margin) due to different positions. The difference in color change directly affects the user's viewing experience. The current solution to the color deviation margin problem is generally to control the monochrome CIE, and control the distribution of color deviation by controlling the actual CIE range. However, this method directly compresses the capabilities of the equipment and the degree of process fluctuation, which leads to a sharp increase in production difficulty.

[0077] The color shift of white light from OLED devices is generally affected by the RGB variation pattern. In view of this, the embodiments of the present disclosure adjust the degree of influence of RGB on the color shift of white light, thereby adjusting the margin under the white light angle, thereby improving the color shift differences at different points of the product.

[0078] Specifically, an embodiment of the present disclosure provides a display substrate, comprising: a base substrate; a first electrode located on the base substrate; a first light-emitting layer located on a side of the first electrode away from the base substrate; a first hole blocking layer located on a side of the first light-emitting layer away from the base substrate; a first electron transport layer located on a side of the first hole blocking layer away from the base substrate; an electron injection layer located on a side of the first electron transport layer away from the base substrate; a second electrode located on a side of the electron injection layer away from the base substrate; an optical extraction layer located on a side of the second electrode away from the base substrate; a protective layer located on a side of the optical extraction layer away from the base substrate; and an encapsulation layer located on a side of the protective layer away from the base substrate, wherein the encapsulation layer comprises a plurality of layers; wherein the refractive index of the material of the optical extraction layer is greater than the refractive index of the material of at least one layer of the encapsulation layer, and the refractive index of the material of at least one layer of the encapsulation layer is greater than the refractive index of the material of the second electrode.

[0079] FIG. 1A is a schematic diagram of a display substrate according to an embodiment of the present disclosure.

[0080] As shown in Figure 1A, the display substrate 1 may include a base substrate 11; a first electrode 12 located on the base substrate 11; a first light-emitting layer 13 located on the side of the first electrode 12 away from the base substrate 11; a first hole blocking layer 14 located on the side of the first light-emitting layer 13 away from the base substrate 11; a first electron transport layer 15 located on the side of the first hole blocking layer 14 away from the base substrate 11; an electron injection layer 16 located on the side of the first electron transport layer 15 away from the base substrate 11; a second electrode 17 located on the side of the electron injection layer 16 away from the base substrate 11; an optical extraction layer 18 located on the side of the second electrode 17 away from the base substrate 11; a protective layer 19 located on the side of the optical extraction layer 18 away from the base substrate 11; and an encapsulation layer 20 located on the side of the protective layer 19 away from the base substrate, wherein the encapsulation layer includes multiple layers; wherein the refractive index of the material of the optical extraction layer 18 is greater than the refractive index of the material of at least one layer of the encapsulation layer 20, and the refractive index of the material of at least one layer of the encapsulation layer 20 is greater than the refractive index of the material of the second electrode 17.

[0081] According to an embodiment of the present disclosure, the first electrode 12 can be used as an anode, and the second electrode 17 can be used as a cathode. The display substrate provided in the embodiment of the present disclosure can be a top-emitting device. Therefore, the anode and cathode can both adopt the anode and cathode materials of the top-emitting OLED device in the prior art. The anode material and cathode material of the embodiment of the present disclosure can be adaptively adjusted according to actual needs. For example, the material of the first electrode can include at least one of silver (Ag), indium tin oxide / silver / indium tin oxide (ITO / Ag / ITO) or nickel-chromium alloy (Ni:Cr alloy). The material of the second electrode 17 can be selected from at least one of transparent conductive oxides, magnesium-silver alloys, aluminum, magnesium, and silver, such as transparent conductive oxides such as ITO, and Mg / Ag / Al / or alloys can also be preferred.

[0082] According to an embodiment of the present disclosure, the first light-emitting layer 13 may include a structure of R, G, and B sub-pixels, wherein the R sub-pixels may serve as the first sub-light-emitting layer, the G sub-pixels may serve as the second sub-light-emitting layer, and the B sub-pixels may serve as the third sub-light-emitting layer.

[0083] According to the embodiments of the present disclosure, the color shift improvement solution of the present application can be applied to top-emitting devices, because a structure that enhances microcavity refraction may exist in the top-emitting device, thereby improving the color shift phenomenon of the display substrate.

[0084] According to an embodiment of the present disclosure, the encapsulation layer may include at least one of a first intercalation layer, a first inorganic layer, a second intercalation layer, an organic layer, and a second inorganic layer. By adjusting the color deviation of one or more layers among the second electrode 17, the optical extraction layer 18, the protective layer 19, and the encapsulation layer 20, the color deviation phenomenon of the display substrate can be improved.

[0085] According to the embodiment of the present disclosure, a hole injection layer 21 , a hole transport layer 22 , etc. may be provided between the first electrode 12 and the first light emitting layer 13 as needed, which will not be described in detail here.

[0086] FIG. 1B is a schematic diagram of a laminated display substrate according to an embodiment of the present disclosure.

[0087] As shown in FIG1B , the display substrate 1 may further include a hole injection layer 21 located on the side of the first electrode 12 away from the base substrate 11; a first hole transport layer 221 located on the side of the hole injection layer 21 away from the base substrate 11; a second light-emitting layer 25 located on the side of the first hole transport layer 221 away from the base substrate 11; a second hole blocking layer 26 located on the side of the second light-emitting layer 25 away from the base substrate 11; a second electron transport layer 27 located on the side of the second hole blocking layer 26 away from the base substrate 11; a charge generation layer 28 located on the side of the second electron transport layer 27 away from the base substrate 11; and a second hole transport layer 222 located on the side of the charge generation layer 28 away from the base substrate 11, wherein the first light-emitting layer 13 is located on the side of the second hole transport layer 222 away from the base substrate 11. The charge generation layer 28 may include an N-type charge generation layer 281 and a P-type charge generation layer 282. It is understood that the color shift improvement solution provided in the embodiments of the present disclosure may also be applied to the stacked device shown in FIG1B .

[0088] FIG1C is a schematic diagram of a display substrate including a plurality of first light-emitting layers according to an embodiment of the present disclosure.

[0089] The first light-emitting layer 13 in the display substrate 1 can be provided as a single layer or multiple layers, as shown in FIG1C . The main difference between FIG1C and FIG1A is that two first light-emitting layers 13 are provided in FIG1C , as well as an electron generation layer 23, a hole generation layer 24, a hole transport layer 22, etc., which are correspondingly provided between the two first light-emitting layers. Optionally, three first light-emitting layers stacked in sequence can also be provided in the display substrate, and accordingly, electron generation layers, hole generation layers, hole transport layers and other structures can be provided between the light-emitting layers according to actual needs. No further details will be given here. It can be understood that the solution for improving color deviation provided in the embodiment of the present disclosure can be applied to a display substrate having a single first light-emitting layer structure, and can also be applied to a display substrate having multiple superimposed first light-emitting layers.

[0090] According to an embodiment of the present disclosure, at least one of the encapsulation layer 20, the optical extraction layer 18, the protective layer 19, and the second electrode 17 can serve as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. The relationship between the color deviation adjustment layer and the remaining film layers in the display substrate other than the color deviation adjustment layer can satisfy the relationship shown in formula (1). s L s +∑n i L i / (n1+∑n i )=T (1)

[0091] Among them, n s Represents the refractive index of the material of the color shift adjustment layer, L s Indicates the thickness of the color shift adjustment layer, n iRepresents the refractive index of the material of the remaining film layers, L i Represents the thickness of the remaining film layers, i is a positive integer, and the range of T is 45 to 95.

[0092] FIG. 2 is a schematic diagram of an encapsulation layer according to an embodiment of the present disclosure.

[0093] As shown in FIG2 , the encapsulation layer 20 may include a first intercalation layer 201 located on the side of the protective layer 19 away from the base substrate 11; a first inorganic layer 202 located on the side of the first intercalation layer 201 away from the base substrate 11; an organic layer 203 located on the side of the first inorganic layer 202 away from the base substrate 11; and a second inorganic layer 204 located on the side of the organic layer 203 away from the base substrate. The "..." in FIG2 may indicate omitted film structures between the base substrate 11 and the protective layer 19.

[0094] According to an embodiment of the present disclosure, when the encapsulation layer 20 includes the first intercalation layer 201, the first inorganic layer 202, the organic layer 203, and the second inorganic layer 204, the first intercalation layer 201 can be used alone as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. The refractive index n of the material of the first intercalation layer 201 is s1 , the thickness L of the first intercalation layer 201 s1 , the refractive index n of the materials of the remaining film layers i and the thickness of the remaining film layers L i The relationship between them can be as shown in formula (2). s1 L s1 +∑n i L i / (n s1 +∑n i )=T (2)

[0095] Wherein, the range of T is 65 to 95; the refractive index n of the material of the first intercalation layer 201 is s1 The product n of the thickness L1 of the first intercalation layer 201 s1 ·L s1 The range of the refractive index n of the material of the first intercalation layer 201 is 70 to 230; s1 The refractive index n of the material of the first intercalation layer 201 is between 1.4 and 1.7, preferably between 1.5 and 1.7; s1 The refractive index n of the material of the protective layer 19 is 保护层 Satisfy between |n s1 -n 保护层 ∣>0.3.

[0096] In the embodiment of the present disclosure, in order to verify the display substrate obtained by the above parameters, S drop is used to measure the change of the color shift margin relative to the reference data ref. Specifically, S drop can be determined using formula (3). S drop = ((S split - S ref.) / S ref.) * 100% (3)

[0097] Here, S split is the color gamut area (scattered distribution area) enclosed by the display substrate in color coordinates obtained during testing. S ref. is the reference data obtained under the same test conditions as the display substrate, which can be understood as the color gamut area enclosed by the reference display substrate in color space coordinates. S drop is the change in S split relative to S ref., with Ref. S drop = 0% being the minimum standard. A negative S drop value indicates improved color shift.

[0098] Furthermore, the embodiments of the present disclosure also propose a calculation scheme for balancing the influence of RGB monochromatic colors. This scheme introduces a monochromatic influence factor Y and defines a sensitivity factor based on the slope of the linear relationship between Y and S drop. Reducing the sensitivity factor can improve the angular white light margin. Y can be determined using formula (4).

[0099] Where CIE_max and CIE_min are the maximum and minimum values ​​of the monochromatic CIE (a color space defined mathematically) range obtained from the sample test, R represents red, G represents green, and B represents blue; x and y represent the x and y coordinate values ​​of the color coordinates, respectively; K1 to K3' represent the weight coefficients of the monochromatic CIE for white light (∑Ki=2.5). Specifically, K1 can range from (0.2 to 0.4), K2 can range from (0.3 to 0.6), K3 can range from (0.06 to 0.09), K1' can range from (0.1 to 0.15), K2' can range from (0.5 to 0.7), and K3' can range from (0.7 to 0.9). A is the proportionality coefficient.

[0100] FIG. 3A is a schematic diagram of the linear relationship of YS drop in the prior art.

[0101] As shown in Figure 3A, the vertical and horizontal axes can be the monochromatic influence factors Y and S drop. The border in Figure 3A can represent the area change trend. The main variable that causes the difference in Y value is the change in the microcavity length. The slope of the linear relationship is defined as the sensitivity factor. The relationship between the monochromatic influence and the sensitivity factor of white light can be: sensitivity factor <1, ​​the effect of monochromatic change on white light is weak; sensitivity factor = 1, monochromatic change is equivalent to white light; sensitivity factor > 1, white light is significantly affected by monochromatic change. The sensitivity factor of the prior art is 3.861 in Figure 3A. Based on the improvement of the device structure of the prior art, the reduction of the sensitivity factor can achieve an improvement in the angular white light margin.

[0102] FIG. 3B is a schematic diagram of the linear relationship of YS drop when the encapsulation layer is as shown in FIG. 2 according to an embodiment of the present disclosure.

[0103] As shown in Figure 3B, when the encapsulation layer 20 includes a first intercalation layer 201, a first inorganic layer 202, an organic layer 203, and a second inorganic layer 204, and the first intercalation layer 201 can be used alone as a color deviation adjustment layer, by adopting the above-mentioned parameter settings, the sensitivity factor of the influence of the change in microcavity length on S drop, that is, YS drop, can be 1.05. 1.05 is less than 3.861 in the prior art, which shows that the display device provided by the embodiment of the present application can effectively improve color deviation.

[0104] Furthermore, the disclosed embodiments also tested luminescence peaks. When the first intercalation layer 201 serves as a color shift adjustment layer, the peak of the spectrum of the first sub-light-emitting layer can be between 625nm and 640nm, the peak of the second sub-light-emitting layer can be between 520nm and 535nm, and the peak of the third sub-light-emitting layer can be between 455nm and 465nm.

[0105] FIG3C is a trend diagram showing the effect of the thickness of the second electrode on the green spectrum according to an embodiment of the present disclosure.

[0106] The embodiments of the present disclosure can only limit the relationship between the thickness and refractive index of the film layer. When the material of the second electrode 17 is preferably Mg / Ag / Al / or an alloy, the thickness of the second electrode 17 has the following influence on the RGB spectrum: within the thickness range of 8 to 16 nm, the following are met: R_Peak wave range: 625 to 635 nm; B_Peak wave range: 445 to 465 nm; G_Peak wave conforms to the segmented pattern shown in FIG3B . In FIG3B , the horizontal axis can be the thickness of the second electrode 17, and the vertical axis can be the range of variation of the green light spectrum peak position. When the thickness of the second electrode 17 is within the range of 12 to 14 nm, the green light spectrum peak position shows a sudden increase trend. Among them, R_Peak wave can represent the red light spectrum peak position, G_Peak wave can represent the green light spectrum peak position, and B_Peak wave can represent the blue light spectrum peak position.

[0107] According to the embodiments of the present disclosure, the film layer structure between the first hole blocking layer 14 and the encapsulation layer 20 can form a microcavity. By matching and limiting the relationship between the thickness and the refractive index of the color deviation adjustment layer, the microcavity effect can be adjusted to reduce the slope of the YS drop linear relationship, thereby reducing the sensitivity factor and improving the color deviation phenomenon of the display substrate.

[0108] FIG. 4 is a schematic diagram of an encapsulation layer according to another embodiment of the present disclosure.

[0109] As shown in FIG4 , the encapsulation layer 20 may include a first inorganic layer 202 located on the side of the protective layer 19 away from the base substrate 11; an organic layer 203 located on the side of the first inorganic layer 202 away from the base substrate 11; and a second inorganic layer 204 located on the side of the organic layer 203 away from the base substrate. The "..." in FIG4 may indicate omitted film structures between the base substrate 11 and the protective layer 19.

[0110] According to an embodiment of the present disclosure, when the encapsulation layer 20 includes the first inorganic layer 202, the organic layer 203, and the second inorganic layer 204, the optical extraction layer 18 can be used alone as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. Specifically, the refractive index n of the material of the optical extraction layer 18 is s2 , the thickness L of the optical extraction layer 18 s2 , the refractive index n of the materials of the remaining film layers i and the thickness of the remaining film layers L i The relationship between them can satisfy the relationship described in formula (5). s2 L s2 +∑n i L i / (n s2 +∑n i )=T (5)

[0111] The range of T is 45 to 55. The refractive index n of the material of the optical extraction layer is s2 The thickness L of the optical extraction layer s2 The product n s2 ·L s2 The range is 90 to 150; the refractive index n of the material of the optical extraction layer s2 The refractive index n of the material of the optical extraction layer 18 is between 1.8 and 2.2; s2 The refractive index n of the protective layer material 保护层 Between satisfies |n s2 -n 保护层 ∣>0.5.

[0112] FIG. 5A is a schematic diagram showing a linear relationship of YS drop when the encapsulation layer is as shown in FIG. 4 according to an embodiment of the present disclosure.

[0113] As shown in Figure 5A , when the encapsulation layer 20 includes a first inorganic layer 202, an organic layer 203, and a second inorganic layer 204, and the optical extraction layer 18 can independently serve as a color shift adjustment layer, the aforementioned parameter settings achieve a sensitivity factor of 0.96 for the effect of microcavity length variation on S drop, or YS drop. This significantly reduces the impact of RGB monochromatic fluctuations on white light in the display substrate structure of this embodiment. This value, 0.96, is lower than the 3.861 of the prior art, demonstrating that the display device provided by the present embodiment can effectively improve color shift.

[0114] Furthermore, the disclosed embodiments also tested emission peaks. When the optical extraction layer 18 serves as a color shift adjustment layer, the peak of the spectrum of the first sub-light-emitting layer can be between 633 nm and 654 nm, the peak of the second sub-light-emitting layer can be between 515 nm and 530 nm, and the peak of the third sub-light-emitting layer can be between 455 nm and 465 nm.

[0115] FIG5B is a trend diagram showing the effect of the thickness of the second electrode on the red spectrum according to an embodiment of the present disclosure.

[0116] The embodiments of the present disclosure can only limit the relationship between the thickness and refractive index of the film layer. When the material of the second electrode 17 is preferably Mg / Ag / Al / or an alloy, the influence trend of the thickness of the second electrode 17 on the RGB spectrum is as follows: within the thickness range of 8 to 16 nm, it conforms to the following: G_Peak wave range: 515 to 525 nm; B_Peak wave range: 450 to 465 nm; R_Peak wave conforms to the segmented pattern shown in Figure 5B. In Figure 5B, the horizontal axis can be the thickness of the second electrode 17, and the vertical axis can be the range of variation of the red light spectrum peak. When the thickness of the second electrode 17 is within the range of 10 to 14 nm, the red light spectrum peak will show a sudden increase trend. Among them, R_Peak wave can represent the red light spectrum peak, G_Peak wave can represent the green light spectrum peak, and B_Peak wave can represent the blue light spectrum peak.

[0117] According to an embodiment of the present disclosure, when the encapsulation layer 20 includes the first inorganic layer 202, the organic layer 203, and the second inorganic layer 204, the protective layer 19 can be used alone as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. Specifically, the refractive index n of the material of the protective layer 19 is s3 , the thickness L of the protective layer 19 s3 , the refractive index n of the materials of the remaining film layers i and the thickness of the remaining film layers L i The relationship between them can be as shown in formula (6). s3 L s3 +∑n i L i / (n s3 +∑n i )=T (6)

[0118] The range of T is 55 to 65. The refractive index n of the material of the protective layer 19 is s3 The thickness L of the protective layer 19 s3 The product n s3 ·L s3 The range is 50 to 110; the refractive index n of the material of the protective layer 19 s3 Between 1.3 and 1.5; the refractive index n of the material of the protective layer 19 s3 The refractive index n of the material of the optical extraction layer 光学取出层 Between satisfies |n s3 -n 光学取出层 ∣>0.5.

[0119] FIG. 6A is a schematic diagram showing a linear relationship of YS drop when the protective layer is a color shift adjustment layer according to an embodiment of the present disclosure.

[0120] As shown in Figure 6A, when the encapsulation layer 20 includes a first inorganic layer 202, an organic layer 203, a second inorganic layer 204, and the protective layer 19 can be used alone as a color deviation adjustment layer, by adopting the above-mentioned parameter settings, the sensitivity factor of the influence of the change in microcavity length on S drop, that is, YS drop, can be 1.54. 1.54 is smaller than 3.861 in the prior art, which shows that the display device provided by the embodiment of the present application can effectively improve color deviation.

[0121] Furthermore, the embodiments of the present disclosure also tested the emission peaks. When the protective layer 19 serves as a color shift adjustment layer, the peak of the spectrum of the first sub-light-emitting layer can be between 615nm and 630nm, the peak of the second sub-light-emitting layer can be between 515nm and 530nm, and the peak of the third sub-light-emitting layer can be between 450nm and 465nm.

[0122] FIG6B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure.

[0123] The embodiments of the present disclosure can only limit the relationship between the thickness and refractive index of the film layer. When the material of the second electrode 17 is preferably Mg / Ag / Al / or an alloy, the influence trend of the thickness of the second electrode 17 on the RGB spectrum is as follows: within the thickness range of 8 to 16 nm, it complies with: R_Peak wave = 1.7L + 603 (L can represent the thickness of the second electrode); G_Peak wave = 0.58x + 516 (x can represent the thickness of the second electrode); B_Peak wave complies with the segmented rule shown in Figure 6B. In Figure 6B, the horizontal axis can be the thickness of the second electrode 17, and the vertical axis can be the range of variation of the blue light spectrum peak. When the thickness of the second electrode 17 is in the range of 8 to 10 nm and 14 to 16 nm, the blue light spectrum peak will show a sudden increase trend. Among them, R_Peak wave can represent the red light spectrum peak, G_Peak wave can represent the green light spectrum peak, and B_Peak wave can represent the blue light spectrum peak.

[0124] According to an embodiment of the present disclosure, when the encapsulation layer 20 includes the first inorganic layer 202, the organic layer 203, and the second inorganic layer 204, the second electrode 17 can be used alone as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. Specifically, the refractive index n of the material of the second electrode 17 is s4 , the thickness L of the second electrode 17 s4 , the refractive index n of the materials of the remaining film layers i and the thickness of the remaining film layers L i The relationship between them can be as shown in formula (7). s4 L s4 +∑n i Li / (n s4 +∑n i )=T (7)

[0125] The range of T is 60 to 65. The refractive index n of the material of the second electrode 17 is s4 The thickness L of the second electrode 17 s4 The product n s4 ·L s4 The range of the refractive index n of the material of the second electrode 17 is 1.5 to 2.0; s4 The refractive index n of the material of the second electrode 17 is between 0.1 and 0.2; s4 The refractive index n of the material of the optical extraction layer 18 is 光学取出层 Between satisfies |n s4 -n 光学取出层 ∣>1.

[0126] FIG. 7A is a schematic diagram showing a linear relationship of YS drop when the second electrode is a color shift adjustment layer according to an embodiment of the present disclosure.

[0127] As shown in Figure 7A, when the encapsulation layer 20 includes a first inorganic layer 202, an organic layer 203, and a second inorganic layer 204, and the protective layer 19 can independently serve as a color shift adjustment layer, by adopting the above-mentioned parameter settings, the sensitivity factor of the effect of microcavity length changes on S drop, namely YS drop, can be 1.25. The cathode is sensitive to the RGB microcavity intensity, and changes in the cathode settings can significantly adjust the color shift sensitivity of white light. 1.25 is less than 3.861 in the prior art, and the present application significantly improves the prior art, indicating that the display device provided by the embodiments of the present application can effectively improve color shift.

[0128] Furthermore, the disclosed embodiments also detect luminescence peaks. When the second electrode 17 serves as a color shift adjustment layer, the peak of the spectrum of the first sub-light-emitting layer can be between 615nm and 625nm, the peak of the second sub-light-emitting layer can be between 520nm and 530nm, and the peak of the third sub-light-emitting layer can be between 455nm and 465nm.

[0129] FIG. 7B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure.

[0130] The embodiments of the present disclosure can only limit the relationship between the thickness and refractive index of the film layer. When the material of the second electrode 17 is preferably Mg / Ag / Al / or an alloy, the influence trend of the thickness of the second electrode 17 on the RGB spectrum is as follows: within the thickness range of 8 to 16 nm, it complies with: R_Peak wave = 0.8L + 610 (L can represent the thickness of the second electrode); G_Peak wave = 0.7167L + 516 (L can represent the thickness of the second electrode); B_Peak wave complies with the segmented rule shown in Figure 7B. In Figure 7B, the horizontal axis can be the thickness of the second electrode 17, and the vertical axis can be the range of variation of the blue light spectrum peak. When the thickness of the second electrode 17 is in the range of 8 to 10 nm and 14 to 16 nm, the blue light spectrum peak will show a sudden increase trend. Among them, R_Peak wave can represent the red light spectrum peak, G_Peak wave can represent the green light spectrum peak, and B_Peak wave can represent the blue light spectrum peak.

[0131] FIG8 is a schematic diagram of an encapsulation layer according to another embodiment of the present disclosure.

[0132] As shown in FIG8 , the encapsulation layer 20 may include a first inorganic layer 202 located on the side of the protective layer 19 away from the base substrate 11; a second intercalation layer 205 located on the side of the first inorganic layer 202 away from the base substrate 11; an organic layer 203 located on the side of the second intercalation layer 205 away from the base substrate 11; and a second inorganic layer 204 located on the side of the organic layer 203 away from the base substrate 11. The “…” in FIG8 may indicate omitted film layer structures between the base substrate 11 and the protective layer 19.

[0133] According to an embodiment of the present disclosure, when the encapsulation layer 20 includes the first inorganic layer 202, the second intercalation layer 205, the organic layer 203, and the second inorganic layer 204, the second intercalation layer 205 can be used alone as a color deviation adjustment layer to improve the color deviation phenomenon of the display substrate. Specifically, the refractive index n of the material of the second intercalation layer 205 is s5 , the thickness L of the second intercalation layer 205 s5 , the refractive index n of the materials of the remaining film layers i and the thickness of the remaining film layers L i The relationship between them can be as shown in formula (8). s5 L s5 +∑n i L i / (n s5 +∑n i )=T (8)

[0134] The range of T is 65 to 95. The refractive index n of the material of the second intercalation layer 205 is s5 The thickness of the protective layer Ls5 The product n s5 ·L s5 The range of the refractive index n of the material of the second intercalation layer 205 is 80 to 160; s5 The refractive index n of the material of the second intercalation layer 205 is between 1.5 and 1.7; s5 The refractive index n of the material of the first inorganic layer 第一无机层 Between satisfies |n s5 -n 第一无机层 ∣>0.15.

[0135] FIG. 9A is a schematic diagram showing a linear relationship of YS drop when the encapsulation layer is as shown in FIG. 8 according to an embodiment of the present disclosure.

[0136] As shown in Figure 9A, when the encapsulation layer 20 includes a first inorganic layer 202, a second intercalation layer 205, an organic layer 203, a second inorganic layer 204, and the second intercalation layer 205 can be used alone as a color deviation adjustment layer, by adopting the above-mentioned parameter settings, the sensitivity factor of the influence of the change in microcavity length on S drop, that is, YS drop, can be 1.32. 1.32 is smaller than 3.861 in the prior art. The present application is significantly improved over the prior art, which shows that the display device provided by the embodiment of the present application can effectively improve color deviation.

[0137] Furthermore, the disclosed embodiments also tested luminescence peaks. When the second intercalation layer 205 serves as a color shift adjustment layer, the peak of the spectrum of the first sub-light-emitting layer can be between 620nm and 635nm, the peak of the second sub-light-emitting layer can be between 515nm and 530nm, and the peak of the third sub-light-emitting layer can be between 450nm and 465nm.

[0138] FIG9B is a trend diagram showing the effect of the thickness of the second electrode on the blue spectrum according to an embodiment of the present disclosure.

[0139] The embodiments of the present disclosure can only limit the relationship between the thickness and refractive index of the film layer. When the material of the second electrode 17 is preferably Mg / Ag / Al / or an alloy, the influence trend of the thickness of the second electrode 17 on the RGB spectrum is as follows: within the thickness range of 8 to 16 nm, it complies with: R_Peak wave = L + 614.56 (L can represent the thickness of the second electrode); G_Peak wave = 0.7x + 513 (x can represent the thickness of the second electrode); B_Peak wave complies with the segmented rule shown in Figure 7B. In Figure 7B, the horizontal axis can be the thickness of the second electrode 17, and the vertical axis can be the range of variation of the blue light spectrum peak. When the thickness of the second electrode 17 is in the range of 10 to 12 nm and 14 to 16 nm, the blue light spectrum peak will show a sudden increase trend. Among them, R_Peak wave can represent the red light spectrum peak, G_Peak wave can represent the green light spectrum peak, and B_Peak wave can represent the blue light spectrum peak.

[0140] The embodiments provided in the present disclosure can be applied to OLED film layer structures (including the increase or decrease of film layers inside a microcavity, multiple light-emitting stacked structures, etc.), multi-layer packaging structures, as well as COE, EES devices, QLED (Quantum Dot Light Emitting Diodes), white light OLED and other structures. The difference in film layer materials is only a difference from the Ref. reference data, and does not affect the film thickness fluctuations caused by the same process level and the law of film layer changes.

[0141] By matching the refractive index and thickness of the color-shift adjustment layer, the disclosed embodiments can significantly improve the sensitivity of the final OED device structure to color shift margins. By structurally constructing the margin-sensitive film layer, the sensitivity of RGB to margin changes is reduced, improving device performance, stabilizing device characteristics, and enhancing the overall display quality.

[0142] The present disclosure also provides a display device, which may include the display substrate described in any of the above embodiments. The display device may be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system.

[0143] It should be understood that the display device provided by the embodiment of the present disclosure includes the above-mentioned display substrate, and the beneficial effects of the display device are the same as the beneficial effects of the above-mentioned display substrate, which will not be repeated here.

[0144] Although some embodiments of the present general inventive concept have been illustrated and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

Claims

1. A display substrate, characterized in that: include: substrate substrate; A first electrode located on the substrate; A first light-emitting layer located on a side of the first electrode away from the base substrate; A first hole blocking layer located on a side of the first light-emitting layer away from the base substrate; A first electron transport layer located on a side of the first hole blocking layer away from the substrate; An electron injection layer located on a side of the first electron transport layer away from the substrate; A second electrode located on a side of the electron injection layer away from the substrate; An optical extraction layer located on a side of the second electrode away from the base substrate; A protective layer located on a side of the optical extraction layer away from the substrate; as well as an encapsulation layer located on a side of the protective layer away from the substrate, wherein the encapsulation layer comprises multiple layers; The refractive index of the material of the optical extraction layer is greater than the refractive index of the material of at least one layer of the encapsulation layer, and the refractive index of the material of at least one layer of the encapsulation layer is greater than the refractive index of the material of the second electrode.

2. The display substrate according to claim 1, characterized in that: The display substrate includes a color deviation adjustment layer, the color deviation adjustment layer is selected from at least one layer of the encapsulation layer, the optical extraction layer, the protective layer and at least one of the second electrode, and the color deviation adjustment layer and the remaining film layers in the display substrate except the color deviation adjustment layer satisfy the following relationship: s L s +∑n i L i / (n1+∑n i ) = T, Among them, n s represents the refractive index of the material of the color shift adjustment layer, L s represents the thickness of the color deviation adjustment layer, n i represents the refractive index of the material of the remaining film layers, L i represents the thickness of the remaining film layers, i is a positive integer, and the range of T is 45 to 95.

3. The display substrate according to claim 2, characterized in that: The light-emitting layer includes three sub-pixels of R, G, and B, wherein the R sub-pixel is the first sub-light-emitting layer, the G sub-pixel is the second sub-light-emitting layer, and the B sub-pixel is the third sub-light-emitting layer.

4. The display substrate according to claim 3, characterized in that: The encapsulation layer comprises: A first intercalation layer located on a side of the protective layer away from the substrate; A first inorganic layer located on a side of the first intercalation layer away from the substrate; an organic layer located on a side of the first inorganic layer away from the base substrate; A second inorganic layer is located on a side of the organic layer away from the base substrate.

5. The display substrate according to claim 4, characterized in that: The refractive index n of the material of the first intercalation layer s1 , the thickness L of the first intercalation layer s1 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s1 L s1 +∑n i L i / (n s1 +∑n i ) = T, Among them, the range of T is 65 to 95.

6. The display substrate according to claim 5, characterized in that: The refractive index n of the material of the first intercalation layer s1 The product of the thickness L1 of the first intercalation layer n s1 ·L s1 The range is 70~230.

7. The display substrate according to claim 6, characterized in that: The refractive index n of the material of the first intercalation layer s1 Between 1.5 and 1.

7.

8. The display substrate according to claim 7, characterized in that: The refractive index n of the material of the first intercalation layer s1 The refractive index n of the material of the protective layer 保护层 Between |n s1 -n 保护层 ∣>0.

3.

9. The display substrate according to claim 8, characterized in that: The peak value range of the first sub-light emitting layer is 625nm-640nm, the peak value range of the second sub-light emitting layer is 520nm-535nm, and the peak value range of the third sub-light emitting layer is 455nm-465nm.

10. The display substrate according to claim 3, characterized in that: The encapsulation layer comprises: A first inorganic layer located on a side of the protective layer away from the substrate; an organic layer located on a side of the first inorganic layer away from the base substrate; A second inorganic layer is located on a side of the organic layer away from the base substrate.

11. The display substrate according to claim 10, characterized in that: The refractive index n of the material of the optical extraction layer s2 , the thickness L of the optical extraction layer s2 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s2 L s2 +∑n i L i / (n s2 +∑n i ) = T, Among them, the range of T is 45~55.

12. The display substrate according to claim 11, characterized in that: The refractive index n of the material of the optical extraction layer s2 The thickness L of the optical extraction layer s2 The product of n s2 ·L s2 The range is 90~150.

13. The display substrate according to claim 12, characterized in that: The refractive index n of the material of the optical extraction layer s2 Between 1.8 and 2.

2.

14. The display substrate according to claim 13, characterized in that: The refractive index n of the material of the optical extraction layer s2 The refractive index n of the material of the protective layer 保护层 Between |n s2 -n 保护层 ∣>0.

5.

15. The display substrate according to claim 14, characterized in that: The peak range of the first sub-light emitting layer is 633nm-654nm, the peak range of the second sub-light emitting layer is 515nm-530nm, and the peak range of the third sub-light emitting layer is 455nm-465nm.

16. The display substrate according to claim 10, characterized in that: The refractive index of the material of the protective layer is n s3 , the thickness of the protective layer L s3 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s3 L s3 +∑n i L i / (n s3 +∑n i ) = T, Among them, the range of T is 55~65.

17. The display substrate according to claim 16, characterized in that: The refractive index of the material of the protective layer is n s3 The thickness of the protective layer L s3 The product of n s3 ·L s3 The range is 50 to 110.

18. The display substrate according to claim 17, characterized in that: The refractive index of the material of the protective layer is n s3 Between 1.3 and 1.

5.

19. The display substrate according to claim 18, characterized in that: The refractive index of the material of the protective layer is n s3 The refractive index n of the material of the optical extraction layer 光学取出层 Between |n s3 -n 光学取出层 ∣>0.

5.

20. The display substrate according to claim 19, characterized in that: The peak range of the first sub-light emitting layer is 615nm-630nm, the peak range of the second sub-light emitting layer is 515nm-530nm, and the peak range of the third sub-light emitting layer is 450nm-465nm.

21. The display substrate according to claim 10, characterized in that: The refractive index n of the material of the second electrode s4 , the thickness L of the second electrode s4 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s4 L s4 +∑n i L i / (n s4 +∑n i ) = T, Among them, the range of T is 60~65.

22. The display substrate according to claim 21, characterized in that: The refractive index n of the material of the second electrode s4 The thickness L of the second electrode s4 The product of n s4 ·L s4 The range is 1.5~2.

0.

23. The display substrate according to claim 22, characterized in that: The refractive index n of the material of the second electrode s4 Between 0.1 and 0.

2.

24. The display substrate according to claim 23, characterized in that: The refractive index n of the material of the second electrode s4 The refractive index n of the material of the optical extraction layer 光学取出层 Between |n s4 -n 光学取出层 ∣>1.

25. The display substrate according to claim 24, characterized in that: The peak value range of the first sub-light emitting layer is 615nm-625nm, the peak value range of the second sub-light emitting layer is 520nm-530nm, and the peak value range of the third sub-light emitting layer is 455nm-465nm.

26. The display substrate according to claim 3, characterized in that: The encapsulation layer comprises: A first inorganic layer located on a side of the protective layer away from the substrate; A second intercalation layer located on a side of the first inorganic layer away from the substrate; an organic layer located on a side of the second intercalation layer away from the substrate; A second inorganic layer is located on a side of the organic layer away from the base substrate.

27. The display substrate according to claim 26, characterized in that: The refractive index n of the material of the second intercalation layer s5 , the thickness L of the second intercalation layer s5 , the refractive index n of the material of the remaining film layers i and the thickness L of the remaining film layers i The following relationship is satisfied: s5 L s5 +∑n i L i / (n s5 +∑n i ) = T, Among them, the range of T is 65 to 95.

28. The display substrate according to claim 27, characterized in that: The refractive index n of the material of the second intercalation layer s5 The thickness of the protective layer L s5 The product of n s5 ·L s5 The range is 80 to 160.

29. The display substrate according to claim 28, characterized in that: The refractive index n of the material of the second intercalation layer s5 Between 1.5 and 1.

7.

30. The display substrate according to claim 29, characterized in that: The refractive index n of the material of the second intercalation layer s5 The refractive index n of the material of the first inorganic layer 第一无机层 Between |n s5 -n 第一无机层 ∣>0.

15.

31. The display substrate according to claim 30, characterized in that: The peak range of the first sub-light emitting layer is 620nm-635nm, the peak range of the second sub-light emitting layer is 515nm-530nm, and the peak range of the third sub-light emitting layer is 450nm-465nm.

32. The display substrate according to claim 1, further comprising: a hole injection layer located on a side of the first electrode away from the substrate; A first hole transport layer located on a side of the hole injection layer away from the substrate; A second light-emitting layer located on a side of the first hole transport layer away from the base substrate; A second hole blocking layer located on a side of the second light emitting layer away from the base substrate; A second electron transport layer located on a side of the second hole blocking layer away from the substrate; A charge generation layer located on a side of the second electron transport layer away from the substrate; A second hole transport layer is located on a side of the charge generation layer away from the substrate, wherein the first light emitting layer is located on a side of the second hole transport layer away from the substrate.

33. The display substrate according to any one of claims 1 to 32, characterized in that: The material of the first electrode includes at least one of silver, indium tin oxide / silver / indium tin oxide, and nickel-chromium alloy; The material of the second electrode includes at least one of transparent conductive oxide, magnesium-silver alloy, aluminum, magnesium, and silver.

34. The display substrate according to any one of claims 1 to 32, characterized in that: S drop≤0, S drop is obtained by: S drop=((S split-S ref.) / S ref.)*100% Wherein, S split is the color gamut area enclosed by the display substrate in the color space coordinates, S ref. is the color gamut area enclosed by the reference display substrate in the color space coordinates, and S drop is the change of split S relative to S ref.

35. A display device, characterized in that: The invention comprises the display substrate according to any one of claims 1 to 34.

Images