Display substrate and display device

Abstract

The invention provides a display substrate and a display device. The display substrate comprises: a substrate; a first electrode; the light-emitting layer is located on the side, away from the substrate, of the first electrode; the second electrode is located on the side, away from the substrate, of the light-emitting 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 comprises a first insertion layer located on the side, away from the substrate, of the protection layer and a second insertion layer located on the side, away from the substrate, of the first insertion layer; a color cast adjusting layer of the display substrate is configured to adjust the color cast degree of the display substrate so that the color cast degree can have the maximum value within the observation angle of 0-90 degrees, and the color cast adjusting layer comprises a first insertion layer and a second insertion layer which are located on a packaging layer. The color cast adjusting layer further comprises one of a film layer, a second electrode, an optical extraction layer and a protection layer, wherein the film layer is taken from the packaging layer except the first insertion layer and the second insertion layer; the thickness of the first intercalation layer is smaller than that of the second intercalation layer.

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 diodes (OLEDs) are a type of current-type organic light-emitting device. They have the advantages of being light and thin, having a wide viewing angle, active luminescence, continuously adjustable luminous color, fast response speed, low energy consumption, simple production process, high luminous efficiency, high brightness, and flexible display. They are widely used in various electronic products.

[0003] During the manufacturing process of display devices, due to the influence of the manufacturing process, the display devices have a certain color deviation, and the color deviation presents different degrees as the viewing angle changes, which directly affects the display effect of the display device.

[0004] Summary of the Invention

[0005] In order to solve at least one aspect of the above problems, the embodiments of the present disclosure provide a display substrate and a display device, which can at least solve the problem of large color shift variations, thereby improving the display effect of the display device and reducing manufacturing costs.

[0006] In one aspect, a display substrate is provided, comprising: a base substrate; a first electrode located on one side of the base substrate; a light-emitting layer located on a side of the first electrode away from the base substrate; a second electrode located on a side of the light-emitting 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, comprising a first intercalation layer located on a side of the protective layer away from the base substrate, and a second intercalation layer located on a side of the first intercalation layer away from the base substrate; the display substrate comprising a color deviation adjustment layer, the color deviation adjustment layer being configured to adjust the degree of color deviation of the display substrate so that the degree of color deviation has a maximum value within an observation angle of 0 to 90 degrees, the color deviation adjustment layer comprising a first intercalation layer and a second intercalation layer located in the encapsulation layer, the color deviation adjustment layer further comprising a film layer taken from the encapsulation layer other than the first intercalation layer and the second intercalation layer, the second electrode, the optical extraction layer, and the protective layer; wherein the first electrode comprises a reflective layer, the second electrode comprises a transparent material, and a thickness L1 of the first intercalation layer is less than a thickness L2 of the second intercalation layer.

[0007] In some exemplary embodiments of the present disclosure, the refractive index n1 of the material of the first intercalation layer and the refractive index n2 of the material of the second intercalation layer satisfy 0.6>|n1-n2|>0.3.

[0008] In some exemplary embodiments of the present disclosure, the color deviation adjustment layer is configured to make the scatter distribution area S1 of the color deviation of the display substrate at a first observation angle α1 larger than the scatter distribution area S2 of the color deviation of the display substrate at a second observation angle α2, wherein 40°<α1<50°, 0°<α2<40°, or 50°<α2<90°.

[0009] In some exemplary embodiments of the present disclosure, when 0°<α2<40°, the scatter point distribution area S of the color shift of the display substrate at the second observation angle α2 is 21 When 50°<α2<90°, the scatter distribution area S of the color shift of the display substrate at the second observation angle α2 is 22 , the S1, the S 21 and the S 22 The relationship between satisfies the following relationship: S1>S 22 >S 21 .

[0010] In some exemplary embodiments of the present disclosure, the scatter point distribution area S of the color shift of the display substrate at the second observation angle α2 is 21 The ratio of the color deviation scatter point distribution area S1 of the display substrate at the first observation angle α1 satisfies the following relationship: 0.3<S 21 / S1<0.55.

[0011] In some exemplary embodiments of the present disclosure, the scatter point distribution area S of the color shift of the display substrate at the second observation angle α2 is 22 The ratio of the color deviation scatter point distribution area S1 of the display substrate at the first observation angle α1 satisfies the following relationship: 0.55<S 22 / S1<0.95.

[0012] In some exemplary embodiments of the present disclosure, the film layers included in the color deviation adjustment layer satisfy the following relationship: ∑(n i L i ) / ∑L i =K

[0013] Wherein, n represents the refractive index of the material of each film layer, L represents the thickness of each film layer, i is a positive integer, and K ranges from 15 to 100.

[0014] In some exemplary embodiments of the present disclosure, the encapsulation layer further includes: a first inorganic layer located on a side of the second 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.

[0015] In some exemplary embodiments of the present disclosure, the color deviation adjustment layer includes the first intercalation layer, the second intercalation layer, and the first inorganic layer; the refractive index of the material of the first inorganic layer is n3, and the thickness of the first inorganic layer is L3; the film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n3L3) / (L1+L2+L3)=K

[0016] Here, the range of K is 40 to 80.

[0017] In some exemplary embodiments of the present disclosure, a refractive index n2 of the material of the second intercalation layer and a refractive index n3 of the material of the first inorganic layer satisfy 0.5>|n2-n3|>0.2.

[0018] In some exemplary embodiments of the present disclosure, the color shift adjustment layer includes the first intercalation layer, the second intercalation layer, and the second electrode; the refractive index of the material of the second electrode is n4, and the thickness of the second electrode is L4; the film layers included in the color shift adjustment layer satisfy the following relationship: (n1L1+n2L2+n4L4) / (L1+L2+L4)=K

[0019] Among them, the range of K is 91 to 93.

[0020] In some exemplary embodiments of the present disclosure, a refractive index n1 of the material of the first intercalation layer and a refractive index n4 of the material of the second electrode satisfy 1.5>|n1-n4|>1.

[0021] In some exemplary embodiments of the present disclosure, the color deviation adjustment layer includes the first intercalation layer, the second intercalation layer, and the protective layer; the refractive index of the material of the protective layer is n5, and the thickness of the protective layer is L5; the film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n5L5) / (L1+L2+L5)=K

[0022] Among them, the range of K is 16 to 18.

[0023] In some exemplary embodiments of the present disclosure, the refractive index n1 of the material of the first intercalation layer and the refractive index n5 of the material of the protective layer satisfy 0.5>|n1-n5|>0.2.

[0024] In some exemplary embodiments of the present disclosure, the color shift adjustment layer includes the first intercalation layer, the second intercalation layer, and the optical extraction layer; the refractive index of the material of the optical extraction layer is n6, and the thickness of the optical extraction layer is L6; the film layers included in the color shift adjustment layer satisfy the following relationship: (n1L1+n2L2+n6L6) / (L1+L2+L6)=K

[0025] Among them, the range of K is 87 to 91.

[0026] In some exemplary embodiments of the present disclosure, the refractive index n1 of the material of the first intercalation layer and the refractive index n6 of the material of the optical extraction layer satisfy 0.5>|n1-n6|>0.2.

[0027] In some exemplary embodiments of the present disclosure, the encapsulation layer further includes: a third intercalation layer located between the first inorganic layer and the organic layer.

[0028] In some exemplary embodiments of the present disclosure, the color shift adjustment layer includes the first intercalation layer, the second intercalation layer, and the third intercalation layer; the refractive index of the material of the third intercalation layer is n7, and the thickness of the third intercalation layer is L7; the film layers included in the color shift adjustment layer satisfy the following relationship: (n1L1+n2L2+n7L7) / (L1+L2+L7)=K

[0029] Among them, the range of K is 97 to 99.

[0030] In some exemplary embodiments of the present disclosure, the refractive index n2 of the material of the second intercalation layer and the refractive index n7 of the material of the third intercalation layer satisfy 0.4>|n2-n7|>0.1.

[0031] In some exemplary embodiments of the present disclosure, a thickness L7 of the third intercalation layer ranges from 100 nanometers to 120 nanometers.

[0032] In some exemplary embodiments of the present disclosure, the light-emitting layer includes a first wavelength light-emitting layer, a second wavelength light-emitting layer and a third wavelength light-emitting layer; the wavelength P1 of light emitted by the first wavelength light-emitting layer ranges from 615 nanometers to 665 nanometers; the wavelength P2 of light emitted by the second wavelength light-emitting layer ranges from 520 nanometers to 535 nanometers; and the wavelength P3 of light emitted by the third wavelength light-emitting layer ranges from 455 nanometers to 470 nanometers.

[0033] In some exemplary embodiments of the present disclosure, a thickness L1 of the first intercalation layer ranges from 65 nanometers to 95 nanometers; a thickness L2 of the second intercalation layer ranges from 95 nanometers to 135 nanometers.

[0034] In some exemplary embodiments of the present disclosure, the display substrate further includes: a hole injection layer located between the first electrode and the light-emitting layer; a hole transport layer located on a side of the hole injection layer away from the base substrate; an electron blocking layer located on a side of the hole transport layer away from the base substrate; a hole blocking layer located between the light-emitting layer and the second electrode; an electron transport layer located on a side of the hole blocking layer away from the base substrate; and an electron injection layer located on a side of the electron transport layer away from the base substrate.

[0035] In some exemplary embodiments of the present disclosure, the first electrode includes a non-transparent material, and the second electrode includes a transparent material.

[0036] Another aspect of the present disclosure provides a display device, comprising the display substrate as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] 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.

[0038] FIG1 schematically shows a scatter diagram of the color shift distribution of a display substrate used for comparison in the present disclosure;

[0039] FIG2 schematically shows a plan view of a display substrate according to an embodiment of the present disclosure;

[0040] FIG3A schematically shows a cross-sectional view of a display substrate according to an embodiment of the present disclosure;

[0041] FIG3B schematically shows a schematic diagram of the scattered distribution of color shift of the display substrate in FIG3A ;

[0042] FIG4A schematically shows a cross-sectional structure diagram of a display substrate according to another embodiment of the present disclosure;

[0043] FIG4B schematically shows a schematic diagram of the scattered point distribution of the color shift of the display substrate in FIG4A ;

[0044] FIG5A schematically shows a cross-sectional structure diagram of a display substrate according to another embodiment of the present disclosure;

[0045] FIG5B schematically shows a schematic diagram of the scattered point distribution of color shift of the display substrate in FIG5A ;

[0046] FIG6A schematically shows a cross-sectional structure diagram of a display substrate according to another embodiment of the present disclosure;

[0047] FIG6B schematically shows a schematic diagram of the scattered point distribution of color shift of the display substrate in FIG6A ;

[0048] FIG7A schematically shows a cross-sectional structure diagram of a display substrate according to another embodiment of the present disclosure;

[0049] FIG. 7B schematically shows a scatter diagram of the color shift distribution of the display substrate in FIG. 7A .

[0050] 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

[0051] 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.

[0052] 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.

[0053] It should be noted that although the terms "first," "second," etc. may be used herein to describe various parts, components, elements, regions, layers, and / or portions, these parts, components, elements, regions, layers, and / or portions should not be limited by these terms. Rather, these terms are used to distinguish one part, component, element, region, layer, and / or portion from another. Thus, for example, the first part, first member, first element, first region, first layer, and / or first portion discussed below may be referred to as a second part, second member, second element, second region, second layer, and / or second portion without departing from the teachings of the present disclosure.

[0054] For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," etc., may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures. It should be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features.

[0055] As used herein, the terms "substantially," "about," "approximately," "roughly," and other similar terms are used as terms of approximation rather than as terms of degree, and are intended to account for the inherent deviations in measured or calculated values ​​that would be recognized by one of ordinary skill in the art. To account for factors such as process fluctuations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), "about" or "approximately" as used herein are inclusive of the stated value and mean within an acceptable range of deviation for the particular value as determined by one of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

[0056] It should be noted that, in this article, the term "the same layer" refers to a layer structure formed by using the same film-forming process to form a film layer used to form a specific pattern, and then patterning the film layer using the same mask through a single patterning process. Depending on the specific pattern, a single patterning process may include multiple exposure, development, or etching processes, and the specific pattern in the resulting layer structure may be continuous or discontinuous. In other words, multiple elements, components, structures, and / or parts located in the "same layer" are composed of the same material and are formed through the same patterning process. Typically, multiple elements, components, structures, and / or parts located in the "same layer" have approximately the same thickness.

[0057] Those skilled in the art should understand that, herein, unless otherwise specified, the expressions "continuous extension", "integrated structure", "monolithic structure" or similar expressions mean that multiple elements, components, structures and / or parts are located on the same layer and are usually formed by the same patterning process during the manufacturing process. There are no spaces or breaks between these elements, components, structures and / or parts, but they are continuously extended structures.

[0058] In this document, the directional expressions "first direction" and "second direction" are used to describe different directions along the pixel region, for example, the longitudinal direction and the transverse direction of the pixel region. It should be understood that such expressions are merely exemplary descriptions and are not intended to limit the present disclosure.

[0059] In this article, the term "color shift" refers to the color difference between a sample and a standard during color measurement of a display substrate. This can be quantified and expressed using a color difference value, such as ΔE. A larger ΔE value indicates a greater color difference between the sample and the standard, i.e., a greater degree of color shift. The degree of color shift of a display substrate varies with changes in the viewing or measurement angle.

[0060] OLED displays have a variety of pixel building blocks, including full-color displays composed of RGB sub-pixels. The organic materials used in OLED displays are typically produced through vapor deposition. As OLED displays grow in size, the uniformity of film thickness during the vapor deposition process cannot be guaranteed. This impacts the performance of monochromatic synthesized white light and the actual color shift across different regions. For example, larger OLED displays can result in significant differences in display quality across different regions.

[0061] In the related art, the scatter distribution areas of multiple display areas within a certain area of ​​the test sample are compared with the control group to determine the degree of color deviation of the test sample. In the scatter distribution diagram, the color accuracy and color deviation degree of the display can be evaluated by the scatter distribution area. If the scatter distribution area is very small, it means that the color accuracy of the display is very high and the color difference is very small; if the scatter distribution area is large, it means that the display has a large color deviation problem and the color difference is very large. For example, for an OLED product to be measured, the area to be tested is divided into m×n matrices, according to the m×n matrix, where m can refer to the arrangement along the first direction and n can refer to the arrangement along the second direction perpendicular to the first direction. The test screen can be, for example, a 255 grayscale white screen, and the measurement angle can be 30°, 45°, 60°, etc. For example, by comparing the difference between the test sample and the control sample, the degree of color deviation of the test sample is determined. When performing the test, the degree of color deviation of the display substrate is determined by comparing the measured data of the pixels on the display substrate at the same viewing angle. For example, S sp1it Can represent the area of ​​the test sample, S ref It can represent the area of ​​the reference sample, S drop It can be understood as S sp1it Relative to S ref . The change in S sp1it With S ref The relationship between them can be expressed by the following formula: drop =((S split -S ref. ) / S ref. )*100%

[0062] S drop =0% is the lowest standard, S drop A negative value can indicate that the color cast has been improved.

[0063] The degree of color shift in current display devices increases with observation or measurement angle. Figure 1 schematically illustrates the scatter point distribution of color shift for a display substrate used for comparison in the present disclosure. For example, as shown in Figure 1, at a measurement angle of 30°, the scatter point distribution area of ​​the test sample is the smallest. As the measurement angle increases, the scatter point distribution area increases. For example, at a measurement angle of 45°, the scatter point distribution area of ​​the test sample begins to increase and is larger than the scatter point distribution area at a measurement angle of 30°. At a measurement angle of 60°, the scatter point distribution area of ​​the test sample is larger than the scatter point distribution area of ​​all test samples. In this case, when the display device is large, the color shift of different areas varies significantly due to changes in the observation or measurement angle, resulting in poor display quality. The larger the display device, the worse the display quality of the entire display device. Moreover, the degree of color shift of the display device increases with increasing measurement angle. To ensure the display quality of the display device, improvements need to be made for the case with the largest degree of color shift. However, the relevant degree of color shift varies linearly with angle, making it impossible to perform good quantitative control, ultimately leading to increased product production costs.

[0064] To address the above-mentioned issues, embodiments of the present disclosure provide a display substrate, including but not limited to: a base substrate; a first electrode located on one side of the base substrate; a light-emitting layer located on a side of the first electrode away from the base substrate; a second electrode located on a side of the light-emitting 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, including a first intercalation layer located on a side of the protective layer away from the base substrate, and a second intercalation layer located on a side of the first intercalation layer away from the base substrate; the display substrate includes a color deviation adjustment layer, the color deviation adjustment layer being configured to adjust the color deviation of the display substrate so that the color deviation reaches a maximum value within an observation angle of 0 to 90 degrees, the color deviation adjustment layer including a first intercalation layer and a second intercalation layer located in the encapsulation layer, the color deviation adjustment layer further including a film layer taken from the encapsulation layer other than the first intercalation layer and the second intercalation layer, the second electrode, the optical extraction layer, and the protective layer; the first electrode includes a reflective layer, the second electrode includes a transparent material, and a thickness L1 of the first intercalation layer is less than a thickness L2 of the second intercalation layer.

[0065] According to an embodiment of the present disclosure, a color deviation adjustment layer is provided on the display substrate, wherein the color deviation adjustment layer is respectively taken from the first intercalation layer and the second intercalation layer located in the encapsulation layer, and taken from one of the film layer other than the first intercalation layer and the second intercalation layer in the encapsulation layer, the second electrode, the optical extraction layer, and the protective layer, that is, the color deviation adjustment layer is provided as three layers. The color deviation adjustment layer can adjust the color deviation degree of the display substrate to have a maximum value within the observation angle of 0 to 90 degrees. That is, through the color deviation adjustment layer provided in the present disclosure, the color deviation degree of the display substrate has a maximum value. When ensuring the display effect of the display substrate, only the measurement angle with the maximum color deviation degree can be detected and adjusted, which can effectively improve the display effect of the display substrate and ensure the consistency of the color deviation of the display substrate. For example, only the measurement angle with the maximum color deviation degree is adjusted to ensure the consistency of the color deviation of the display substrate, effectively improving the display effect of the display substrate and reducing production costs.

[0066] The display substrate according to the embodiment of the present disclosure will be described in detail below with reference to FIG. 2 to FIG. 7B .

[0067] 2 schematically shows a plan view of a display substrate according to an embodiment of the present disclosure. Referring to FIG2 , the display substrate according to an embodiment of the present disclosure may include a base substrate 10 and a pixel unit PX disposed on the base substrate 10 .

[0068] The display substrate 100 may include a display area AA and a non-display area NA. The display area AA may be an area where pixel cells PX displaying an image are located. Each pixel cell PX will be described later. The non-display area NA is an area where pixel cells PX are not located, that is, an area where no image is displayed. The non-display area NA corresponds to the bezel in the final display device, and the width of the bezel is determined based on the width of the non-display area NA.

[0069] The display area AA can have various shapes. For example, the display area AA can be provided in various shapes, such as a closed polygon (e.g., a rectangle) with straight sides, a circle or an ellipse with curved sides, or a semicircle or a semiellipse with both straight and curved sides. In the embodiment of the present disclosure, the display area AA is provided as a quadrilateral with straight sides. It should be understood that this is merely an exemplary embodiment of the present disclosure and is not intended to limit the present disclosure.

[0070] The non-display area NA may be provided on at least one side of the display area AA. In an embodiment of the present disclosure, the non-display area NA may surround the periphery of the display area AA. In an embodiment of the present disclosure, the non-display area NA may include a transverse portion extending in a first direction X and a longitudinal portion extending in a second direction Y.

[0071] The pixel unit PX is provided in the display area AA. The pixel unit PX is the smallest unit for displaying an image and may be provided in plurality. For example, the pixel unit PX may include a light emitting device that emits white light and / or colored light.

[0072] The pixel units PX may be provided in a plurality and arranged in a matrix along rows extending in the first direction X and columns extending in the first direction Y. However, the embodiments of the present disclosure do not specifically limit the arrangement of the pixel units PX, and the pixel units PX may be arranged in various forms. For example, the pixel units PX may be arranged such that a direction inclined relative to the first direction X and the first direction Y becomes a column direction, and a direction intersecting the column direction becomes a row direction.

[0073] That is, the plurality of pixel units PX are arranged in an array along the first direction X and the second direction Y to form a plurality of rows of pixel units and a plurality of columns of pixel units.

[0074] A pixel unit PX may include multiple sub-pixels. For example, a pixel unit PX may include three sub-pixels, namely a first sub-pixel SP1, a second sub-pixel SP2, and a third sub-pixel SP3. For example, the first sub-pixel SP1 may be a red sub-pixel, the second sub-pixel SP2 may be a green sub-pixel, and the third sub-pixel SP3 may be a blue sub-pixel.

[0075] It should be noted that, in the embodiment of the present disclosure, the number of sub-pixels included in a pixel unit is not particularly limited and is not limited to the above-mentioned three.

[0076] Figure 3A schematically shows a cross-sectional view of a display substrate according to an embodiment of the present disclosure. Figure 3B schematically shows a scatter diagram of the color shift distribution of the display substrate of Figure 3A.

[0077] Figure 3A is a schematic cross-sectional view of the display substrate 100 shown in Figure 2. As shown in Figure 3A, the display substrate 100 includes a base substrate 10, a first electrode 11, a light-emitting layer 12, a second electrode 13, an optical extraction layer 14, a protective layer 15, and an encapsulation layer 16. The first electrode 11 is located on one side of the base substrate. The light-emitting layer 12 is located on the side of the first electrode away from the base substrate. The second electrode 13 is located on the side of the light-emitting layer away from the base substrate. The optical extraction layer 14 is located on the side of the second electrode away from the base substrate. The protective layer 15 is located on the side of the optical extraction layer away from the base substrate. The encapsulation layer 16 is located on the side of the protective layer 15 away from the base substrate 10. The encapsulation layer 16 includes a first intercalation layer 161, a second intercalation layer 162, a first inorganic layer 163, an organic layer 164, and a second inorganic layer 165, arranged in this order away from the base substrate 10. Specifically, the first intercalation layer 161 is located on the side of the protective layer 15 away from the base substrate 10. The second intercalation layer 162 is located on the side of the first intercalation layer away from the substrate 10. The first inorganic layer 163 is located on the side of the second intercalation layer away from the substrate. The organic layer 164 is located on the side of the first inorganic layer away from the substrate. The second inorganic layer 165 is located on the side of the organic layer away from the substrate.

[0078] The display substrate 100 further includes a hole injection layer 17, a hole transport layer 18, an electron blocking layer 19, a hole blocking layer 20, an electron transport layer 21, and an electron injection layer 22. Specifically, the hole injection layer 17 is located between the first electrode and the light-emitting layer. The hole transport layer 18 is located on the side of the hole injection layer away from the base substrate. The electron blocking layer 19 is located on the side of the hole transport layer away from the base substrate. The hole blocking layer 20 is located between the light-emitting layer and the second electrode. The electron transport layer 21 is located on the side of the hole blocking layer away from the base substrate. The electron injection layer 22 is located on the side of the electron transport layer away from the base substrate.

[0079] Exemplarily, the base substrate 10 can be made of a light-transmitting material such as glass or polyimide. The first electrode 11 can serve as the anode of the display substrate 100. The first electrode 11 includes a non-transparent material, such as a reflective layer composed of a metal layer, and can serve as a conductive electrode or reflect light. The first electrode 11 can be made of a material such as Mg or Ag, or can be an electrode composed of other conductive materials and an emissive layer. For example, the first electrode can also be composed of a conductive material such as ITO or indium zinc oxide, and a reflective layer. The second electrode 13 can include a transparent material, or can include Mg / Ag / Al or an alloy material.

[0080] The light-emitting layer 12 includes, for example, a first light-emitting layer 121, a second light-emitting layer 122, and a third light-emitting layer 123. The first light-emitting layer 121, the second light-emitting layer 122, and the third light-emitting layer 123 each emit light of a different wavelength. For example, the first light-emitting layer 121 may emit light in the red spectrum, the second light-emitting layer 122 may emit light in the green spectrum, and the third light-emitting layer 123 may emit light in the blue spectrum. Specifically, the light-emitting layer may include R, G, and B sub-pixels.

[0081] For example, the spectral wavelength of the first light emitting layer 121 is in the range of 615 nm to 665 nm, the spectral wavelength of the second light emitting layer 122 is in the range of 520 nm to 535 nm, and the spectral wavelength of the third light emitting layer 123 is in the range of 455 nm to 470 nm.

[0082] In an embodiment of the present disclosure, the display substrate further includes a color deviation adjustment layer ML for adjusting the color deviation of the display substrate so that the color deviation of the display substrate 100 reaches a maximum value within an observation angle or a measurement angle of 0 to 90 degrees.

[0083] In a display substrate, greater fluctuations in film thickness have a greater impact on screen display uniformity. Specifically, the color shift at different locations increases the scattered distribution area at a fixed observation or measurement angle. For example, the maximum color shift in the display substrate of the present disclosure occurs when the observation or measurement angle is between 40 and 50 degrees. For example, at an observation or measurement angle of 45 degrees, the maximum color shift occurs, i.e., the scattered distribution area is the largest.

[0084] In some embodiments of the present disclosure, the color deviation adjustment layer is configured to make the scattered point distribution area S1 of the color deviation of the display substrate at a first observation angle α1 larger than the scattered point distribution area S2 of the color deviation of the display substrate at a second observation angle α2, wherein 40°<α1<50°, 0°<α2<40°, or 50°<α2<90°.

[0085] When 0°<α2<40°, the scatter distribution area S of the color shift of the display substrate at the second observation angle α2 21 When 50°<α2<90°, the scatter distribution area S of the color shift of the display substrate at the second observation angle α2 is 22 , S1, S 21 and S 22 The relationship between satisfies the following relationship: S1>S 22 >S 21 .

[0086] In some exemplary embodiments of the present disclosure, the scatter distribution area S of the color shift of the display substrate at the second observation angle α2 is 21The ratio of the color deviation scatter point distribution area S1 of the display substrate at the first observation angle α1 satisfies the following relationship: 0.3<S 21 / S1<0.55.

[0087] In some exemplary embodiments of the present disclosure, the scatter distribution area S of the color shift of the display substrate at the second observation angle α2 is 22 The ratio of the color deviation scatter point distribution area S1 of the display substrate at the first observation angle α1 satisfies the following relationship: 0.55<S 22 / S1<0.95.

[0088] By providing the color deviation adjustment layer ML, during the actual manufacturing process of the display substrate, only the angle at which the color deviation is at its maximum can be measured and adjusted, thereby preparing to control the display effect of the display substrate. For example, by reducing the color deviation of the display substrate at its maximum, the color deviation of the display substrate can be reduced as a whole, thereby improving the display effect of the display substrate. In addition, measurement and adjustment can be performed only at specific angles, reducing the workload of measurement and adjustment and reducing production costs. In the embodiment of the present disclosure, the color deviation adjustment layer ML includes a first intercalation layer 161, a second intercalation layer 162, and another film layer located in the encapsulation layer 16. The other film layer includes a film layer taken from the encapsulation layer 16 other than the first intercalation layer 161 and the second intercalation layer 162, a second electrode 13, an optical extraction layer 14, and a protective layer 15.

[0089] In an embodiment of the present disclosure, the thickness L1 of the first intercalation layer 161 in the color shift adjustment layer ML is less than the thickness L2 of the second intercalation layer 162. Furthermore, the refractive index of the material of the first intercalation layer 161 is n1, and the refractive index of the material of the second intercalation layer is n2, where n1 and n2 satisfy the relationship 0.6>|n1-n2|>0.3. For example, the refractive index n1 of the first intercalation layer 161 can be greater than the refractive index n2 of the material of the second intercalation layer, or the refractive index n1 of the first intercalation layer 161 can be less than the refractive index n2 of the material of the second intercalation layer. Thus, by setting the thickness and refractive index of the first intercalation layer 161 and the second intercalation layer 162, and also setting the thickness and / or refractive index of a film layer of the color shift adjustment layer ML other than the first intercalation layer 161 and the second intercalation layer 162, the color shift adjustment layer ML can achieve the aforementioned maximum color shift of the display substrate 100 within an observation angle or measurement angle of 0 to 90 degrees.

[0090] In the embodiment of the present disclosure, the film layers (eg, the first intercalation layer 161 , the second intercalation layer 162 and another film layer) included in the color deviation adjustment layer ML satisfy the following relationship: ∑(n i L i ) / ∑L i =K

[0091] Wherein, n represents the refractive index of the material of each film layer, L represents the thickness of each film layer in nanometers, i is a positive integer, and K ranges from 15 to 100. The value of K varies within the above range depending on the position and refractive index of the other film layer.

[0092] In an embodiment of the present disclosure, the thickness L1 of the first intercalation layer ranges from 65 nanometers to 95 nanometers, and the thickness L2 of the second intercalation layer ranges from 95 nanometers to 135 nanometers.

[0093] For example, in the embodiment shown in Figures 3A and 3B, the color shift adjustment layer ML1 includes a first intercalation layer 161, a second intercalation layer 162, and a first inorganic layer 163. Specifically, the first inorganic layer 163 is a film layer in the encapsulation layer 16. The refractive index of the material of the first inorganic layer is n3, and the thickness of the first inorganic layer is L3. The film layers included in the color shift adjustment layer ML1 satisfy the following relationship: (n1L1+n2L2+n3L3) / (L1+L2+L3)=K

[0094] Here, the range of K is 40 to 80.

[0095] In this embodiment, the first light-emitting layer 121 has a spectrum wavelength of 618 nm to 622 nm, the second light-emitting layer 122 has a spectrum wavelength of 524 nm to 533 nm, and the third light-emitting layer 123 has a spectrum wavelength of 457 nm to 462 nm.

[0096] Specifically, the relationship between the K value and the spectral wavelength P of the light-emitting layer can be expressed by the following formula:

[0097] The refractive index n2 of the material of the second intercalation layer and the refractive index n3 of the material of the first inorganic layer satisfy 0.5>|n2-n3|>0.2. That is, in this embodiment, n1 and n2 satisfy 0.6>|n1-n2|>0.3, and n2 and n3 satisfy 0.5>|n2-n3|>0.2.

[0098] In this embodiment, the optical extraction layer 14 , the protective layer 15 , the first intercalation layer 161 , and the second intercalation layer 162 can be made of inorganic small molecule materials, silicon oxynitride, and other materials.

[0099] In this embodiment, the thickness L1 of the first intercalation layer is preferably, for example, 80 nanometers; the thickness L2 of the second intercalation layer is preferably, for example, 130 nanometers.

[0100] As shown in Figure 3B , in this embodiment, the scatter point distribution of the display substrate is tested at different observation or measurement angles, for example, at 30°, 45°, and 60°. As shown in Figure 3B , the scatter point distribution area is small at 30° and 60°, while it is largest at 45°. The relationship between the scatter point distribution areas S at different angles can be expressed as: S30°:S45°:S60° = 0.33:1:0.93. Specifically, by adjusting the thickness L and the refractive index n of the first intercalation layer 161, the second intercalation layer 162, and the first inorganic layer 163, which comprise the color shift adjustment layer ML1, the scatter point distribution area of ​​the display substrate is maximized at 45°. Consequently, when the color shift of the display substrate is controlled at 45°, the color shift at other angles is also controlled. This means that when controlling the color shift of a product, only the color shift at 45° is reduced, while the color shift at other angles is also reduced. This effectively improves the display quality of the display substrate and reduces manufacturing costs.

[0101] According to the embodiments of the present disclosure, by setting the thickness and refractive index of the film layer included in the color deviation adjustment layer of the display substrate, the technical effect of improving color deviation can be achieved, thereby solving the probability of excessive dispersion caused by color deviation differences at multiple points on the display screen, and improving the display and yield of the display substrate as a whole.

[0102] Figure 4A schematically shows a cross-sectional view of a display substrate according to another embodiment of the present disclosure. Figure 4B schematically shows a scatter diagram of the color shift distribution of the display substrate of Figure 4A.

[0103] For example, in the embodiment shown in Figures 4A and 4B, the color shift adjustment layer ML2 includes a first intercalation layer 161, a second intercalation layer 162, and a second electrode 13. Specifically, the refractive index of the material of the second electrode 13 is n4, and the thickness of the second electrode 13 is L4. The film layers included in the color shift adjustment layer ML1 satisfy the following relationship: (n1L1+n2L2+n4L4) / (L1+L2+L4)=K

[0104] Among them, the range of K is 91 to 93.

[0105] In this embodiment, the first light-emitting layer 121 has a spectrum wavelength of 616 nm to 620 nm, the second light-emitting layer 122 has a spectrum wavelength of 523 nm to 531 nm, and the third light-emitting layer 123 has a spectrum wavelength of 456 nm to 461 nm.

[0106] Specifically, the relationship between the K value and the spectral wavelength P of the light-emitting layer can be expressed by the following formula:

[0107] The refractive index n1 of the material of the first intercalation layer and the refractive index n4 of the material of the second electrode satisfy 1.5>|n1-n4|>1. That is, in this embodiment, n1 and n2 satisfy 0.6>|n1-n2|>0.3, and n1 and n4 satisfy 1.5>|n1-n4|>1.

[0108] In this embodiment, the optical extraction layer 14 , the protective layer 15 , the first intercalation layer 161 , and the second intercalation layer 162 may also be made of inorganic small molecule materials, silicon oxynitride, and other materials.

[0109] In this embodiment, the thickness L1 of the first intercalation layer is preferably, for example, 70 nanometers; the thickness L2 of the second intercalation layer is preferably, for example, 120 nanometers.

[0110] As shown in Figure 4B , in this embodiment, the scatter point distribution of the display substrate is tested at different observation or measurement angles, for example, at 30°, 45°, and 60°. As shown in Figure 4B , the scatter point distribution area is small at 30° and 60°, while it is largest at 45°. The relationship between the scatter point distribution areas S at different angles can be expressed as: S30°:S45°:S60° = 0.38:1:0.87. Specifically, by adjusting the thickness L and the refractive index n of the first intercalation layer 161, the second intercalation layer 162, and the second electrode 13, which comprise the color shift adjustment layer ML2, the scatter point distribution area of ​​the display substrate is maximized at 45°. Consequently, when the color shift of the display substrate is controlled at 45°, the color shift at other angles is also controlled. This means that when controlling the color shift of a product, only the color shift at 45° is reduced, while the color shift at other angles is also reduced. This effectively improves the display quality of the display substrate and reduces manufacturing costs.

[0111] In this embodiment, when compared with the scatter distribution area between the comparative samples, S drop =-45%, from which it can be seen that the color shift has been significantly improved.

[0112] Figure 5A schematically shows a cross-sectional view of a display substrate according to another embodiment of the present disclosure. Figure 5B schematically shows a scatter diagram of the color shift distribution of the display substrate of Figure 5A.

[0113] For example, in the embodiment shown in Figures 5A and 5B, as shown in Figure 5A, the color shift adjustment layer ML3 includes a first intercalation layer 161, a second intercalation layer 162, and a protective layer 15. Specifically, the refractive index of the material of the protective layer 15 is n5, and the thickness of the protective layer 15 is L5. The film layers included in the color shift adjustment layer ML3 satisfy the following relationship: (n1L1+n2L2+n5L5) / (L1+L2+L5)=K

[0114] Among them, the range of K is 16 to 18.

[0115] In this embodiment, the first light-emitting layer 121 has a spectrum wavelength of 633 nm to 643 nm, the second light-emitting layer 122 has a spectrum wavelength of 524 nm to 530 nm, and the third light-emitting layer 123 has a spectrum wavelength of 458 nm to 463 nm.

[0116] Specifically, the relationship between the K value and the spectral wavelength P of the light-emitting layer can be expressed by the following formula:

[0117] The refractive index n1 of the material of the first intercalation layer and the refractive index n5 of the material of the protective layer satisfy 0.5>|n1-n5|>0.2. That is, in this embodiment, n1 and n2 satisfy 0.6>|n1-n2|>0.3, and n1 and n5 satisfy 0.5>|n1-n5|>0.2.

[0118] In this embodiment, the optical extraction layer 14 , the protective layer 15 , the first intercalation layer 161 , and the second intercalation layer 162 may also be made of inorganic small molecule materials, silicon oxynitride, and other materials.

[0119] In this embodiment, the thickness L1 of the first intercalation layer is, for example, preferably 90 nanometers; the thickness L2 of the second intercalation layer is, for example, preferably 100 nanometers.

[0120] As shown in Figure 5B , in this embodiment, the scatter point distribution of the display substrate is tested at different observation or measurement angles, for example, at 30°, 45°, and 60°. As shown in Figure 5B , the scatter point distribution area is small at 30° and 60°, while it is largest at 45°. The relationship between the scatter point distribution areas S at different angles can be expressed as: S30°:S45°:S60° = 0.46:1:0.67. Specifically, by adjusting the thickness L and the refractive index n of the first intercalation layer 161, the second intercalation layer 162, and the protective layer 15, including the color shift adjustment layer ML3, the scatter point distribution area of ​​the display substrate is maximized at 45°. Consequently, when the color shift of the display substrate is controlled at 45°, the color shift at other angles is also controlled. This means that when controlling the color shift of a product, only the color shift at 45° is reduced, while the color shift at other angles is also reduced. This effectively improves the display quality of the display substrate and reduces manufacturing costs.

[0121] In this embodiment, when compared with the scatter distribution area between the comparative samples, S drop =-40%, from which it can be seen that the color shift has been significantly improved.

[0122] Figure 6A schematically shows a cross-sectional view of a display substrate according to another embodiment of the present disclosure. Figure 6B schematically shows a scatter diagram of the color shift distribution of the display substrate of Figure 6A.

[0123] For example, in the embodiment shown in Figures 6A and 6B, as shown in Figure 6A, the color shift adjustment layer ML4 includes a first intercalation layer 161, a second intercalation layer 162, and an optical extraction layer 14. Specifically, the refractive index of the material of the optical extraction layer 14 is n6, and the thickness of the optical extraction layer 14 is L6. The film layers included in the color shift adjustment layer ML4 satisfy the following relationship: (n1L1+n2L2+n6L6) / (L1+L2+L6)=K

[0124] Among them, the range of K is 87 to 91.

[0125] In this embodiment, the first light-emitting layer 121 has a spectrum wavelength of 650 nm to 661 nm, the second light-emitting layer 122 has a spectrum wavelength of 523 nm to 529 nm, and the third light-emitting layer 123 has a spectrum wavelength of 457 nm to 461 nm.

[0126] Specifically, the relationship between the K value and the spectral wavelength P of the light-emitting layer can be expressed by the following formula:

[0127] The refractive index n1 of the material of the first intercalation layer and the refractive index n6 of the material of the optical extraction layer satisfy 0.5>|n1-n6|>0.2. That is, in this embodiment, n1 and n2 satisfy 0.6>|n1-n2|>0.3, and n1 and n6 satisfy 0.5>|n1-n6|>0.2.

[0128] In this embodiment, the optical extraction layer 14 , the protective layer 15 , the first intercalation layer 161 , and the second intercalation layer 162 may also be made of inorganic small molecule materials, silicon oxynitride, and other materials.

[0129] In this embodiment, the thickness L1 of the first intercalation layer is preferably, for example, 70 nanometers; the thickness L2 of the second intercalation layer is preferably, for example, 130 nanometers.

[0130] As shown in Figure 6B , in this embodiment, the scatter point distribution of the display substrate is tested at different observation or measurement angles, for example, at 30°, 45°, and 60°. As shown in Figure 6B , the scatter point distribution area is small at 30° and 60°, while it is largest at 45°. The relationship between the scatter point distribution areas S at different angles can be expressed as: S30°:S45°:S60° = 0.36:1:0.73. Specifically, by adjusting the thickness L and the refractive index n of the first intercalated layer 161, the second intercalated layer 162, and the optical extraction layer 14, including the color shift adjustment layer ML4, the scatter point distribution area of ​​the display substrate is maximized at 45°. Consequently, when the color shift of the display substrate is controlled at 45°, the color shift at other angles is also controlled. This means that when controlling the color shift of a product, only the color shift at 45° is reduced, while the color shift at other angles is also reduced. This effectively improves the display quality of the display substrate and reduces manufacturing costs.

[0131] In this embodiment, when compared with the scatter distribution area between the comparative samples, S d r op =-40%, from which it can be seen that the color shift has been significantly improved.

[0132] Figure 7A schematically shows a cross-sectional view of a display substrate according to another embodiment of the present disclosure. Figure 7B schematically shows a scatter diagram of the color shift distribution of the display substrate of Figure 7A.

[0133] As shown in Figures 7A and 7B, in this embodiment, the encapsulation layer 16' includes a first intercalation layer 161, a second intercalation layer 162, a first inorganic layer 163, a third intercalation layer 166, an organic layer 164, and a second inorganic layer 165, which are sequentially arranged away from the base substrate 10. Specifically, the first intercalation layer 161 is located on the side of the protective layer 15 away from the base substrate 10. The second intercalation layer 162 is located on the side of the first intercalation layer away from the base substrate 10. The first inorganic layer 163 is located on the side of the second intercalation layer away from the base substrate. The third intercalation layer 166 is located on the side of the first inorganic layer 163 away from the base substrate, that is, between the first inorganic layer 163 and the organic layer 164. The organic layer 164 is located on the side of the third intercalation layer 166 away from the base substrate. The second inorganic layer 165 is located on the side of the organic layer away from the base substrate.

[0134] In this embodiment, as shown in FIG7A , the color shift adjustment layer ML5 includes a first intercalation layer 161, a second intercalation layer 162, and a third intercalation layer 166. Specifically, the refractive index of the material of the third intercalation layer 166 is n7, and the thickness of the third intercalation layer 166 is L7. The film layers included in the color shift adjustment layer ML5 satisfy the following relationship: (n1L1+n2L2+n7L7) / (L1+L2+L7)=K

[0135] Among them, the range of K is 97 to 99.

[0136] In this embodiment, the first light-emitting layer 121 has a spectrum wavelength of 625 nm to 631 nm, the second light-emitting layer 122 has a spectrum wavelength of 520 nm to 526 nm, and the third light-emitting layer 123 has a spectrum wavelength of 458 nm to 466 nm.

[0137] Specifically, the relationship between the K value and the spectral wavelength P of the light-emitting layer can be expressed by the following formula:

[0138] The refractive index n2 of the material of the second intercalation layer and the refractive index n7 of the material of the third intercalation layer satisfy 0.4>|n2-n7|>0.1. That is, in this embodiment, n1 and n2 satisfy 0.6>|n1-n2|>0.3, and n2 and n7 satisfy 0.4>|n2-n7|>0.1.

[0139] In this embodiment, the optical extraction layer 14 , the protective layer 15 , the first intercalation layer 161 , and the second intercalation layer 162 may also be made of inorganic small molecule materials, silicon oxynitride, and other materials.

[0140] In this embodiment, the thickness L1 of the first intercalation layer is preferably 80 nanometers, the thickness L2 of the second intercalation layer is preferably 120 nanometers, and the thickness L7 of the third intercalation layer is, for example, in the range of 100 to 120 nanometers, and is preferably 110 nanometers.

[0141] As shown in Figure 7B , in this embodiment, the scatter point distribution of the display substrate is tested at different observation or measurement angles, for example, at 30°, 45°, and 60°. As shown in Figure 7B , the scatter point distribution area is small at 30° and 60°, while it is largest at 45°. The relationship between the scatter point distribution areas S at different angles can be expressed as: S30°:S45°:S60° = 0.54:1:0.59. Specifically, by adjusting the thickness L and the refractive index n of the first, second, and third intercalated layers 161, 162, and 166 of the color shift adjustment layer ML5, the scatter point distribution area of ​​the display substrate is maximized at 45°. Consequently, when the color shift of the display substrate is controlled at 45°, the color shift at other angles is also controlled. This means that when controlling the color shift of a product, only the color shift at 45° is reduced, while the color shift at other angles is also reduced. This effectively improves the display quality of the display substrate and reduces manufacturing costs.

[0142] In this embodiment, when compared with the scatter distribution area between the comparative samples, S drop=-18.8%, from which it can be seen that the color shift has been improved to a certain extent.

[0143] According to an embodiment of the present disclosure, a color deviation adjustment layer is provided on the display substrate, and the color deviation adjustment layer can adjust the color deviation degree of the display substrate to have a maximum value within an observation angle of 0 to 90 degrees. That is, through the color deviation adjustment layer provided in the present disclosure, the color deviation degree of the display substrate has a maximum value. When adjusting the display effect of the display substrate, only the color deviation of the maximum value can be adjusted, thereby reducing the steps of detection after the color deviation adjustment, and at the same time greatly improving the display effect of the display substrate, while ensuring the consistency of the color deviation of the display substrate and reducing production costs.

[0144] Another aspect of the present disclosure provides a display device, which includes the display substrate described above.

[0145] The beneficial effects that can be achieved by the display device in the above-mentioned embodiment of the present disclosure are the same as the beneficial effects that can be achieved by the above-mentioned display substrate, and will not be described in detail here.

[0146] The display device can be any device that displays an image, whether in motion (e.g., video) or stationary (e.g., still image), and whether textual or graphic. More specifically, it is contemplated that the embodiments may be implemented in or associated with a variety of electronic devices, such as, but not limited to, mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat-panel displays, computer monitors, automotive displays (e.g., speedometer displays, etc.), navigation systems, cockpit controls 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), and the like.

[0147] 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, wherein: include: substrate substrate; A first electrode is located on one side of the substrate; A light-emitting layer is located on a side of the first electrode away from the substrate; A second electrode is located on a side of the light emitting layer away from the base substrate; An optical extraction layer is 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 The encapsulation layer comprises a first intercalation layer located on a side of the protective layer away from the substrate, and a second intercalation layer located on a side of the first intercalation layer away from the substrate; The display substrate includes a color deviation adjustment layer, wherein the color deviation adjustment layer is configured to adjust the color deviation degree of the display substrate so that the color deviation degree has a maximum value within an observation angle of 0 to 90 degrees. The color deviation adjustment layer includes a first intercalation layer and a second intercalation layer located in the encapsulation layer, and the color deviation adjustment layer also includes a film layer taken from the encapsulation layer except the first intercalation layer and the second intercalation layer, the second electrode, the optical extraction layer, and one of the protective layer; Wherein, the first electrode comprises a reflective layer, and the second electrode comprises a transparent material. The thickness L1 of the first intercalation layer is smaller than the thickness L2 of the second intercalation layer.

2. The display substrate according to claim 1, wherein: The refractive index n1 of the material of the first intercalation layer and the refractive index n2 of the material of the second intercalation layer satisfy 0.6>|n1-n2|>0.

3.

3. The display substrate according to claim 2, wherein: The color deviation adjustment layer is configured to make the scatter point distribution area S1 of the color deviation of the display substrate at a first observation angle α1 larger than the scatter point distribution area S2 of the color deviation of the display substrate at a second observation angle α2. Among them, 40°<α1<50°, 0°<α2<40°, or 50°<α2<90°.

4. The display substrate according to claim 3, wherein: When 0°<α2<40°, the scatter point distribution area S of the color deviation of the display substrate at the second observation angle α2 21 , When 50°<α2<90°, the scatter point distribution area S of the color deviation of the display substrate at the second observation angle α2 22 , The S1, the S 21 and the S 22 The relationship between them satisfies the following relationship: S1>S 22 >S 21 。 5. The display substrate according to claim 4, wherein: The scattered point distribution area S of the color deviation of the display substrate at the second observation angle α2 21 The ratio of the scatter point distribution area S1 of the color deviation of the display substrate at the first observation angle α1 satisfies the following relationship: 0.3<S 21 / S1<0.55。 6. The display substrate according to claim 4, wherein: The scattered point distribution area S of the color deviation of the display substrate at the second observation angle α2 22 The ratio of the scatter point distribution area S1 of the color deviation of the display substrate at the first observation angle α1 satisfies the following relationship: 0.55<S 22 / S1<0.95。 7. The display substrate according to claim 2, wherein: The film layers included in the color deviation adjustment layer satisfy the following relationship: ∑(n i L i ) / ∑L i =K Wherein, n represents the refractive index of the material of each film layer, L represents the thickness of each film layer, i is a positive integer, and K ranges from 15 to 100.

8. The display substrate according to claim 7, wherein: The encapsulation layer further comprises: A first inorganic layer located on a side of the second 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.

9. The display substrate according to claim 8, wherein: The color deviation adjustment layer includes the first intercalation layer, the second intercalation layer and the first inorganic layer; The refractive index of the material of the first inorganic layer is n3, and the thickness of the first inorganic layer is L3; The film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n3L3) / (L1+L2+L3)=K Among them, the range of K is 40 to 80.

10. The display substrate according to claim 9, wherein: The refractive index n2 of the material of the second intercalation layer and the refractive index n3 of the material of the first inorganic layer satisfy 0.5>|n2-n3|>0.

2.

11. The display substrate according to claim 8, wherein: The color deviation adjustment layer includes the first intercalation layer, the second intercalation layer and the second electrode; The refractive index of the material of the second electrode is n4, and the thickness of the second electrode is L4; The film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n4L4) / (L1+L2+L4)=K Among them, the range of K is 91 to 93.

12. The display substrate according to claim 11, wherein: A refractive index n1 of the material of the first intercalation layer and a refractive index n4 of the material of the second electrode satisfy 1.5>|n1-n4|>1.

13. The display substrate according to claim 8, wherein: The color deviation adjustment layer includes the first intercalation layer, the second intercalation layer and the protective layer; The refractive index of the material of the protective layer is n5, and the thickness of the protective layer is L5; The film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n5L5) / (L1+L2+L5)=K Among them, the range of K is 16 to 18.

14. The display substrate according to claim 13, wherein: The refractive index n1 of the material of the first intercalation layer and the refractive index n5 of the material of the protective layer satisfy 0.5>|n1-n5|>0.

2.

15. The display substrate according to claim 8, wherein: The color deviation adjustment layer includes the first intercalation layer, the second intercalation layer and the optical extraction layer; The refractive index of the material of the optical extraction layer is n6, and the thickness of the optical extraction layer is L6; The film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n6L6) / (L1+L2+L6)=K Among them, the range of K is 87 to 91.

16. The display substrate according to claim 15, wherein: The refractive index n1 of the material of the first intercalation layer and the refractive index n6 of the material of the optical extraction layer satisfy 0.5>|n1-n6|>0.

2.

17. The display substrate according to claim 8, wherein: The encapsulation layer further comprises: A third intercalation layer is located between the first inorganic layer and the organic layer.

18. The display substrate according to claim 17, wherein: The color deviation adjustment layer includes the first intercalation layer, the second intercalation layer and the third intercalation layer; The refractive index of the material of the third intercalation layer is n7, and the thickness of the third intercalation layer is L7; The film layers included in the color deviation adjustment layer satisfy the following relationship: (n1L1+n2L2+n7L7) / (L1+L2+L7)=K Among them, the range of K is 97 to 99.

19. The display substrate according to claim 18, wherein: The refractive index n2 of the material of the second intercalation layer and the refractive index n7 of the material of the third intercalation layer satisfy 0.4>|n2-n7|>0.

1.

20. The display substrate according to claim 19, wherein: The thickness L7 of the third intercalation layer ranges from 100 nanometers to 120 nanometers.

21. The display substrate according to claim 1, wherein: The light-emitting layer includes a first wavelength light-emitting layer, a second wavelength light-emitting layer and a third wavelength light-emitting layer; The wavelength P1 of the light emitted by the first wavelength light emitting layer ranges from 615 nanometers to 665 nanometers; The wavelength P2 of the light emitted by the second wavelength light emitting layer ranges from 520 nanometers to 535 nanometers; The wavelength P3 of the light emitted by the third wavelength light emitting layer is in the range of 455 nanometers to 470 nanometers.

22. The display substrate according to claim 1, wherein: The thickness L1 of the first intercalation layer ranges from 65 nm to 95 nm; The thickness L2 of the second intercalation layer ranges from 95 nanometers to 135 nanometers.

23. The display substrate according to claim 1, wherein: Also includes: A hole injection layer, located between the first electrode and the light-emitting layer; A hole transport layer, located on a side of the hole injection layer away from the substrate; An electron blocking layer, located on a side of the hole transport layer away from the substrate; a hole blocking layer, located between the light-emitting layer and the second electrode; An electron transport layer, located on a side of the hole blocking layer away from the substrate; The electron injection layer is located on a side of the electron transport layer away from the substrate.

24. A display device, wherein: The display substrate comprises the display substrate as claimed in any one of claims 1 to 23.

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