Display substrate, manufacturing method therefor, and display apparatus

Abstract

Provided are a display substrate, a manufacturing method therefor, and a display apparatus. The display substrate comprises: a base substrate; a plurality of pixel units located on the base substrate, each pixel unit comprising a first color sub-pixel and a second color sub-pixel; and a plurality of light-emitting structures, a color filter layer and a plurality of lenses which are successively arranged away from the base substrate. The color filter layer comprises a plurality of color filters, the plurality of color filters being respectively disposed corresponding to the plurality of light-emitting structures, the plurality of lenses being respectively disposed corresponding to the plurality of color filters, and the plurality of color filters comprising a first filter allowing light of a first wavelength to pass through and a second filter allowing light of a second wavelength to pass through. The central axis of a light-emitting structure corresponding to the first filter is offset from the central axis of a lens corresponding to the first filter by a first offset distance, and the central axis of a light-emitting structure corresponding to the second filter is offset from the central axis of a lens corresponding to the second filter by a second offset distance, the first offset distance being not equal to the second offset distance.

Description

Display substrate, manufacturing method thereof and display device TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display, and in particular to a display substrate, a manufacturing method thereof and a display device. BACKGROUND

[0002] Micro Lens in Micro OLED (Organic Light-Emitting Diode) display device mainly plays the role of light condensation and improving the brightness of the normal viewing angle. By designing the relative anode opening offset of the Micro Lens, the brightest angle can be changed to realize angle customization. Due to the difference in light emission of the bottom layer pixels, the angle customization difference of the pixels is caused, resulting in problems such as color deviation and uneven brightness. Therefore, how to optimize the angle customization design is one of the important research topics of the researchers in the field.

[0003] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present disclosure, and therefore can include information that does not constitute prior art known to those skilled in the art. SUMMARY

[0004] In one aspect, a display substrate is provided, comprising:

[0005] a substrate substrate;

[0006] a plurality of pixel units on the substrate substrate, the pixel units are arranged in an array on the substrate substrate along a first direction and a second direction, the first direction and the second direction intersect, wherein the pixel units comprise first color sub-pixels and second color sub-pixels;

[0007] a plurality of light emitting structures on the substrate substrate; and

[0008] a color filter layer on a side of the light emitting structure away from the substrate substrate, wherein the color filter layer comprises a plurality of color filters, the plurality of color filters are respectively arranged corresponding to the plurality of light emitting structures, the plurality of color filters comprise first filters for allowing light of a first wavelength to pass through and second filters for allowing light of a second wavelength to pass through; and

[0009] a plurality of lenses on a side of the color filter layer away from the substrate substrate, the plurality of lenses are respectively arranged corresponding to the plurality of color filters, wherein,

[0010] The central axis of the light emitting structure corresponding to the first filter is offset from the central axis of the lens corresponding to the first filter by a first offset distance, the central axis of the light emitting structure corresponding to the second filter is offset from the central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance.

[0011] According to some exemplary embodiments, the plurality of color filters further comprises a third filter for allowing light of a third wavelength to pass through, the central axis of the light emitting structure corresponding to the third filter is offset from the central axis of the lens corresponding to the third filter by a third offset distance, wherein the third offset distance is not equal to the first offset distance, and the third offset distance is not equal to the second offset distance.

[0012] According to some exemplary embodiments, the display substrate further comprises a reflective layer located on the side of the light emitting structure close to the substrate, and the light emitting structure comprises a first electrode, a light emitting layer and a second electrode in turn away from the substrate, wherein the distance between the reflective layer and the second electrode corresponding to the first color sub-pixel is greater than the distance between the reflective layer and the second electrode corresponding to the second color sub-pixel, the wavelength of the light of the first wavelength is greater than the wavelength of the light of the second wavelength, and the first offset distance is less than the second offset distance; and / or,

[0013] The distance between the reflective layer and the second electrode corresponding to the second color sub-pixel is greater than the distance between the reflective layer and the second electrode corresponding to the third color sub-pixel, the wavelength of the light of the second wavelength is greater than the wavelength of the light of the third wavelength, and the second offset distance is less than the third offset distance.

[0014] According to some exemplary embodiments, the plurality of pixel units comprises a first pixel unit located at a first image height and a second pixel unit located at a second image height, wherein the first image height is less than the second image height, and the image height is the distance from the center of the display area of the display substrate to the edge of the display area.

[0015] The first offset distance corresponding to the first color sub-pixel in the first pixel unit is less than the first offset distance corresponding to the first color sub-pixel in the second pixel unit; and / or,

[0016] The second offset distance corresponding to the second color sub-pixel in the first pixel unit is less than the second offset distance corresponding to the second color sub-pixel in the second pixel unit; and / or,

[0017] The third offset distance corresponding to the third color sub-pixel in the first pixel unit is less than the third offset distance corresponding to the third color sub-pixel in the second pixel unit.

[0018] According to some exemplary embodiments, in the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value; the difference between the third offset distance and the second offset distance is a second offset difference value; and the difference between the second offset distance and the first offset distance is a third offset difference value,

[0019] wherein the first offset difference value in the first pixel unit is equal to the first offset difference value in the second pixel unit; and / or,

[0020] the second offset difference value in the first pixel unit is equal to the second offset difference value in the second pixel unit; and / or,

[0021] the third offset difference value in the first pixel unit is equal to the third offset difference value in the second pixel unit.

[0022] According to some exemplary embodiments, in the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value; the difference between the third offset distance and the second offset distance is a second offset difference value; and the difference between the second offset distance and the first offset distance is a third offset difference value,

[0023] wherein the first offset difference value in the first pixel unit is less than the first offset difference value in the second pixel unit; and / or,

[0024] the second offset difference value in the first pixel unit is less than the second offset difference value in the second pixel unit; and / or,

[0025] the third offset difference value in the first pixel unit is less than the third offset difference value in the second pixel unit.

[0026] According to some exemplary embodiments, the display substrate comprises a plurality of pixel unit groups, each pixel unit group comprises M adjacent pixel units, M is a positive integer greater than or equal to 2, wherein,

[0027] In the M adjacent pixel units in the same pixel unit group, the first offset distance of at least one pixel unit is not equal to the first offset distance of at least another pixel unit; and / or, the second offset distance of at least one pixel unit is not equal to the second offset distance of at least another pixel unit; and / or, the third offset distance of at least one pixel unit is not equal to the third offset distance of at least another pixel unit.

[0028] According to some exemplary embodiments, in the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value; the difference between the third offset distance and the second offset distance is a second offset difference value; and the difference between the second offset distance and the first offset distance is a third offset difference value.

[0029] The pixel unit group comprises a third pixel unit and a fourth pixel unit adjacent to each other, wherein,

[0030] The first offset difference value in the third pixel unit is smaller than the first offset difference value in the fourth pixel unit; and / or,

[0031] The second offset difference value in the third pixel unit is smaller than the second offset difference value in the fourth pixel unit; and / or,

[0032] The third offset difference value in the third pixel unit is smaller than the third offset difference value in the fourth pixel unit.

[0033] According to some exemplary embodiments, the display substrate comprises a plurality of pixel unit groups, each of the pixel unit groups comprises M pixel units adjacent to each other, M is a positive integer greater than or equal to 3; each of the pixel unit groups comprises an i-th pixel unit, an (i+1)-th pixel unit and an (i+2)-th pixel unit adjacent to each other in sequence, wherein i is a positive integer greater than or equal to 1 and smaller than or equal to M-2, wherein,

[0034] The first offset distance corresponding to the first color sub-pixel in the i-th pixel unit is smaller than the first offset distance corresponding to the first color sub-pixel in the (i+1)-th pixel unit; and the first offset distance corresponding to the first color sub-pixel in the (i+1)-th pixel unit is smaller than the first offset distance corresponding to the first color sub-pixel in the (i+2)-th pixel unit; and / or,

[0035] The second offset distance corresponding to the second color sub-pixel in the i-th pixel unit is smaller than the second offset distance corresponding to the second color sub-pixel in the (i+1)-th pixel unit; and the second offset distance corresponding to the second color sub-pixel in the (i+1)-th pixel unit is smaller than the second offset distance corresponding to the second color sub-pixel in the (i+2)-th pixel unit; and / or,

[0036] The third offset distance corresponding to the third color sub-pixel in the i-th pixel unit is smaller than the third offset distance corresponding to the third color sub-pixel in the (i+1)-th pixel unit; and the third offset distance corresponding to the third color sub-pixel in the (i+1)-th pixel unit is smaller than the third offset distance corresponding to the third color sub-pixel in the (i+2)-th pixel unit.

[0037] According to some exemplary embodiments, the display substrate comprises a plurality of pixel unit groups, each of the pixel unit groups comprises M adjacent pixel units, M is a positive integer greater than or equal to 3; each of the pixel unit groups comprises an i-th pixel unit, an (i+1)-th pixel unit and an (i+2)-th pixel unit in sequence, wherein i is a positive integer greater than or equal to 1 and less than or equal to M-2, wherein,

[0038] a first offset distance corresponding to a first color sub-pixel in the i-th pixel unit is less than a first offset distance corresponding to a first color sub-pixel in the (i+1)-th pixel unit; and the first offset distance corresponding to the first color sub-pixel in the (i+1)-th pixel unit is greater than a first offset distance corresponding to a first color sub-pixel in the (i+2)-th pixel unit; and / or,

[0039] a second offset distance corresponding to a second color sub-pixel in the i-th pixel unit is less than a second offset distance corresponding to a second color sub-pixel in the (i+1)-th pixel unit; and the second offset distance corresponding to the second color sub-pixel in the (i+1)-th pixel unit is greater than a second offset distance corresponding to a second color sub-pixel in the (i+2)-th pixel unit; and / or,

[0040] a third offset distance corresponding to a third color sub-pixel in the i-th pixel unit is less than a third offset distance corresponding to a third color sub-pixel in the (i+1)-th pixel unit; and the third offset distance corresponding to the third color sub-pixel in the (i+1)-th pixel unit is greater than a third offset distance corresponding to a third color sub-pixel in the (i+2)-th pixel unit.

[0041] According to some exemplary embodiments, the display substrate comprises a first pixel unit group located at a first pixel height and a second pixel unit group located at a second pixel height, the first pixel height is less than the second pixel height, wherein,

[0042] a first offset difference value corresponding to a plurality of pixel units in the first pixel unit group is respectively less than a first offset difference value corresponding to a plurality of pixel units in the second pixel unit group; and / or,

[0043] a second offset difference value corresponding to a plurality of pixel units in the first pixel unit group is respectively less than a second offset difference value corresponding to a plurality of pixel units in the second pixel unit group; and / or,

[0044] a third offset difference value corresponding to a plurality of pixel units in the first pixel unit group is respectively less than a third offset difference value corresponding to a plurality of pixel units in the second pixel unit group.

[0045] According to some exemplary embodiments, a projection of the lens on the substrate substrate at least partially overlaps with a projection of the corresponding color filter on the substrate substrate.

[0046] According to some exemplary embodiments, a normal projection of the light emitting structure on the substrate falls within a normal projection of the corresponding color filter on the substrate.

[0047] According to some exemplary embodiments, a central axis of the color filter coincides with a central axis of the corresponding light emitting structure; or,

[0048] a central axis of the color filter coincides with a central axis of the corresponding lens; or,

[0049] a central axis of the color filter is located between a central axis of the corresponding light emitting structure and a central axis of the corresponding lens.

[0050] According to some exemplary embodiments, at least partially adjacent first and second filters partially overlap, an overlap width of the first and second filters being a first width; at least partially adjacent second and third filters partially overlap, an overlap width of the second and third filters being a second width; at least partially adjacent third and first filters partially overlap, an overlap width of the third and first filters being a third width,

[0051] wherein the first width is greater than the second width; and / or,

[0052] the first width is greater than the third width.

[0053] In another aspect of the present disclosure, a display substrate is provided, comprising:

[0054] a substrate;

[0055] a plurality of pixel units on the substrate, the pixel units being arranged in an array on the substrate along a first direction and a second direction, the first direction and the second direction intersecting, wherein the pixel units comprise first color sub-pixels and second color sub-pixels;

[0056] a plurality of light emitting structures on the substrate; and

[0057] a color filter layer located on a side of the light emitting structure distal to the substrate, wherein the color filter layer includes a plurality of color filters, the plurality of color filters are respectively arranged corresponding to the plurality of light emitting structures, the plurality of color filters include a first filter for allowing light of a first wavelength to pass through and a second filter for allowing light of a second wavelength to pass through, wherein a central axis of the first filter is offset from a central axis of a corresponding light emitting structure by a fourth offset distance; a central axis of the second filter is offset from a central axis of a corresponding light emitting structure by a fifth offset distance, the fourth offset distance is not equal to the fifth offset distance; and

[0058] a plurality of lenses located on a side of the color filter layer distal to the substrate, the plurality of lenses are respectively arranged corresponding to the plurality of color filters,

[0059] wherein a central axis of the light emitting structure corresponding to the first filter is offset from a central axis of a lens corresponding to the first filter by a first offset distance, a central axis of the light emitting structure corresponding to the second filter is offset from a central axis of a lens corresponding to the second filter by a second offset distance, the first offset distance is not equal to the second offset distance.

[0060] According to some exemplary embodiments, the plurality of color filters further include a third filter for allowing light of a third wavelength to pass through, a central axis of the light emitting structure corresponding to the third filter is offset from a central axis of a lens corresponding to the third filter by a third offset distance, the third offset distance is not equal to the first offset distance, and the third offset distance is not equal to the second offset distance; and / or,

[0061] a central axis of the third filter is offset from a central axis of a corresponding light emitting structure by a sixth offset distance, the sixth offset distance is not equal to the fourth offset distance, and the sixth offset distance is not equal to the fifth offset distance.

[0062] According to some exemplary embodiments, the central axis of the color filter coincides with the central axis of the corresponding lens.

[0063] In yet another aspect of the present disclosure, a method for manufacturing a display substrate is provided, comprising:

[0064] providing a substrate;

[0065] forming a plurality of light emitting structures on the substrate to form a plurality of light emitting elements corresponding to a plurality of pixel units, wherein the pixel units include first color sub-pixels and second color sub-pixels;

[0066] a color filter layer is formed on a side of the light emitting structure away from the substrate, wherein the color filter layer comprises a plurality of color filters, the plurality of color filters are respectively arranged corresponding to the plurality of light emitting structures, and the plurality of color filters comprise a first filter for allowing light of a first wavelength to pass through and a second filter for allowing light of a second wavelength to pass through; and

[0067] a plurality of lenses are formed on a side of the color filter layer away from the substrate, the plurality of lenses are respectively arranged corresponding to the plurality of color filters, wherein,

[0068] a central axis of the light emitting structure corresponding to the first filter is offset from a central axis of the lens corresponding to the first filter by a first offset distance, a central axis of the light emitting structure corresponding to the second filter is offset from a central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance.

[0069] In yet another aspect of the present disclosure, a display device is provided, wherein the display device comprises the display substrate according to any one of the above. BRIEF DESCRIPTION OF DRAWINGS

[0070] The above and other objects, features and advantages of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:

[0071] FIG. 1 is a plan view of a display substrate according to an embodiment of the present disclosure;

[0072] FIG. 2 is a cross-sectional view taken along line AA' in FIG. 1;

[0073] FIG. 3 is a cross-sectional view taken along line AA' in FIG. 1 of a display substrate according to an embodiment of the present disclosure;

[0074] FIG. 4 is a graph showing the relationship between the light output angle and the luminance decay of different color sub-pixels in a display substrate according to an embodiment of the present disclosure;

[0075] FIG. 5A is a cross-sectional view taken along line AA' in FIG. 1 of a display substrate according to an embodiment of the present disclosure; FIG. 5B is a partial enlarged view according to a dashed line frame S1 in FIG. 5A; and FIG. 5C is a partial enlarged view according to a dashed line frame S2 in FIG. 5A;

[0076] FIG. 6 is a cross-sectional view of pixel units at different image heights in a display substrate according to an embodiment of the present disclosure;

[0077] FIG. 7 is a cross-sectional view of pixel units at different image heights in a display substrate according to an embodiment of the present disclosure;

[0078] FIG. 8 is a cross-sectional schematic view of a pixel unit group in a display substrate according to an embodiment of the present disclosure;

[0079] FIG. 9 is a plan schematic view of a display substrate according to an embodiment of the present disclosure;

[0080] FIG. 10A is a cross-sectional schematic view of a pixel unit of a display substrate according to an embodiment of the present disclosure; FIG. 10B is a cross-sectional schematic view of a pixel unit of a display substrate according to another embodiment of the present disclosure;

[0081] FIG. 11 is a flowchart of a method for manufacturing a display substrate according to an embodiment of the present disclosure;

[0082] FIG. 12 is a flowchart of a method for manufacturing a display substrate according to another embodiment of the present disclosure;

[0083] FIG. 13 is a structural block diagram of a display device according to an embodiment of the present disclosure.

[0084] It should be noted that, for the sake of clarity, the size of a layer, structure, or region in the drawings can be exaggerated or reduced, i.e., the drawings are not necessarily drawn to scale relative to each other. DETAILED DESCRIPTION

[0085] In order to make the objects, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong within the scope of the present disclosure.

[0086] It should be noted that, in the drawings, the size and relative size of elements can be exaggerated for the sake of clarity and / or description. Thus, the size and relative size of the elements in the drawings are not necessarily drawn to scale. In the description and drawings, identical or similar reference numerals indicate identical or similar components.

[0087] Unless otherwise defined, technical terms or scientific terms used in the present disclosure should be understood as having the same meaning as commonly understood by one of ordinary skill in the art. The terms “first”, “second”, and similar terms in the present disclosure do not denote any order, quantity, or importance, but are used to distinguish different components. The terms “include” or “contain” and similar terms mean that the elements or objects before the terms encompass the elements or objects listed after the terms and their equivalents, and do not exclude other elements or objects.

[0088] In this document, unless otherwise indicated, directional terms such as "upper", "lower", "left", "right", "inner", "outer", and the like are used for convenience with reference to the orientation of the figures as shown and are not intended to limit or imply the specific orientation of the device, element, or component or method, or the specific structure, construction, or operation thereof. It is understood that the relative positions of the described objects can change when their absolute positions change. Therefore, these directional terms should not be interpreted as limiting the disclosure.

[0089] In this document, directional expressions "first direction", "second direction" are used to describe different directions of the display substrate, for example, the row direction and the column direction of the display substrate. It should be understood that such expressions are only exemplary descriptions, and are not limitations of the disclosure.

[0090] In this document, unless otherwise specified, the expression "electrically connected" can mean that two components or elements are directly electrically connected, for example, component or element A is in direct contact with component or element B, and an electrical signal can be transmitted therebetween; it can also mean that two components or elements are electrically connected through a conductive medium such as a conductive wire, for example, component or element A is electrically connected to component or element B through a conductive wire to transmit an electrical signal between the two components or elements; it can also mean that two components or elements are electrically connected through at least one electronic component, for example, component or element A is electrically connected to component or element B through at least one thin film transistor to transmit an electrical signal between the two components or elements.

[0091] "About" in this document means not strictly limited boundaries, allowing values within the range of process and measurement errors.

[0092] Unless otherwise specified, the relevant terms appearing in this document can be interpreted as follows.

[0093] Chief Ray Angle (CRA): refers to the maximum angle of light focusing on a pixel.

[0094] Exemplarily, the micro OLED display device takes mono-silicon integrated circuit as a backplane and top-emitting OLED device as a light source, has the advantages of small volume, light weight, high contrast, fast response speed and low power consumption, and is expected to become the next generation of mobile display terminal. The micro OLED display device includes a display substrate. The micro lens mainly plays a role of light condensation and improving the brightness of the normal viewing angle in the micro OLED display device. By designing the micro lens to have a relative anode opening offset, the change of the brightest angle can be realized, and the angle customization can be realized. The inventors have found through research that in the OLED display device with a strong microcavity structure, the light-emitting cavity lengths of different wavelengths of light (for example, RGB) are inconsistent, resulting in differences in RGB light output intensity. When the micro lens is designed to have the same offset distance relative to the anode opening to realize angle customization, the differences in RGB light output at the bottom layer will cause differences in RGB customized angles, thereby causing color deviation problems at the customized angles. For example, the main light angle R-CRA of the red sub-pixel is greater than the main light angle B-CRA of the blue sub-pixel, and the main light angle B-CRA of the blue sub-pixel is greater than the main light angle G-CRA of the green sub-pixel. The difference in RGB customized angles when synthesizing white light will cause the synthesized white light to be reddish or purplish, thereby reducing the display effect of the OLED display device. In addition, when the angle customization design is performed, if the offset amount difference of the micro lenses at adjacent positions is too large, problems such as uneven brightness and alternating bright and dark stripes will occur when displayed on the screen.

[0095] Exemplarily, in an embodiment of the present disclosure, a display substrate is provided. The display substrate includes: a substrate substrate; a plurality of pixel units on the substrate substrate, the pixel units being arranged in an array on the substrate substrate along a first direction and a second direction, the first direction and the second direction intersecting, wherein the pixel units include first color sub-pixels and second color sub-pixels; a plurality of light-emitting structures on the substrate substrate; and a color filter layer on a side of the light-emitting structure away from the substrate substrate, wherein the color filter layer includes a plurality of color filters, the plurality of color filters are respectively arranged corresponding to the plurality of light-emitting structures, the plurality of color filters include first filters for allowing light of a first wavelength to pass through and second filters for allowing light of a second wavelength to pass through; and a plurality of lenses on a side of the color filter layer away from the substrate substrate, the plurality of lenses are respectively arranged corresponding to the plurality of color filters, wherein a central axis of the light-emitting structure corresponding to the first filter is offset from a central axis of the lens corresponding to the first filter by a first offset distance, a central axis of the light-emitting structure corresponding to the second filter is offset from a central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance.

[0096] In embodiments of the present disclosure, by differentially designing the offset distances of the lenses corresponding to subpixels of different colors, the main light angles of the subpixels of different colors can be made substantially equal, thereby reducing or eliminating color cast.

[0097] FIG. 1 is a plan view of a display substrate according to an embodiment of the present disclosure; FIG. 2 is a cross-sectional view taken along line AA' in FIG. 1.

[0098] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 1, a display substrate 100 can include a substrate 1. For example, the substrate 1 can be a silicon-based substrate. The substrate 1 includes a display area AA. The display substrate 100 further includes a plurality of pixel units PX disposed on the substrate 1. The plurality of pixel units PX are located in the display area AA. The plurality of pixel units PX are arranged in an array on the substrate 1 along a first direction X and a second direction Y. The first direction X and the second direction Y intersect. A pixel unit PX can include a first color subpixel sp1, a second color subpixel sp2, and a third color subpixel sp3. For example, the first color subpixel sp1 can be a red subpixel, the second color subpixel sp2 can be a green subpixel, and the third color subpixel can be a blue subpixel.

[0099] In embodiments of the present disclosure, the display area AA can have various shapes. For example, the display area AA can be provided in various shapes such as a polygon (e.g., a rectangle) having a closed shape including straight sides, a circle including curved sides, an ellipse, and the like, and a semi-circle, a semi-ellipse, and the like including straight sides and curved sides. In embodiments of the present disclosure, the display area is provided as one area having a quadrilateral shape including straight sides, the center of the display area AA can be an area where the intersection points of two diagonals of a right-angled quadrilateral are located, and the edges of the display area AA can be areas where the four sides of the right-angled quadrilateral are located. It should be understood that this is merely an exemplary embodiment of the present disclosure, and is not a limitation of the present disclosure.

[0100] The pixel units PX can be arranged in a matrix form along rows extending in the first direction X and columns extending in the second direction Y. However, embodiments of the present disclosure do not specifically limit the arrangement form of the pixel units PX, and the pixel units PX can be arranged in various forms. For example, the pixel units PX can be arranged such that a direction inclined with respect to the first direction X and the second direction Y becomes a column direction, and a direction intersecting the column direction becomes a row direction.

[0101] Exemplarily, the micro OLED display device can realize color display by using white light emitting structure plus color filter. The color filter realizes the passing of single color red (blue / green) light by absorbing light of specific wavelength. For example, referring to FIG. 2, the display substrate 100 can include a plurality of light emitting structures EL disposed on the substrate substrate 1. The light emitting structure EL can be a white light emitting element. For example, the light emitting structure EL can be a white light emitting OLED light emitting element. The light emitting direction of the light emitting structure EL can be the third direction Z as shown in FIG. 2. The third direction Z can be perpendicular to the plane where the first direction X and the second direction Y are located.

[0102] Exemplarily, the light emitting structure EL can include a first electrode, a light emitting layer and a second electrode. For example, the first electrode can be an anode, and the second electrode can be a cathode. The first electrodes of the plurality of light emitting structures EL can be disposed at intervals, thereby forming a plurality of light emitting structures EL distributed at intervals. The display substrate 100 can further include a driving circuit layer between the light emitting structure EL and the substrate substrate 1, and the driving circuit layer can be connected to the first electrodes of the plurality of light emitting structures EL, thereby driving the plurality of light emitting structures EL to emit light and realizing different display effects.

[0103] Exemplarily, continuing to refer to FIG. 2, the display substrate 100 can further include a first planarization layer PLN1 located on the side of the light emitting structure EL away from the substrate substrate 1; and an encapsulation layer 2 located on the side of the first planarization layer PLN1 away from the substrate substrate 1. The encapsulation layer 2 can be used to protect the light emitting structure EL and isolate water and oxygen from entering the light emitting structure.

[0104] The display substrate 100 can further include a color filter layer 3 disposed on the side of the encapsulation layer 2 away from the substrate substrate 1. The color filter layer 3 can include a plurality of color filters CF. The plurality of color filters CF can be disposed corresponding to the plurality of light emitting structures EL, respectively, so that the light emitted by the light emitting structure EL can pass through the corresponding color filter CF to emit light of a specific color.

[0105] Exemplarily, the orthographic projection of the light emitting structure EL on the substrate substrate 1 falls within the orthographic projection of the corresponding color filter CF on the substrate substrate 1, so that most of the light emitted by each light emitting structure EL can pass through the corresponding color filter CF to be emitted outward, thereby improving the color purity of various single color light and facilitating the improvement of the display effect of the display substrate.

[0106] Exemplarily, the plurality of color filters CF includes a first filter CF1 for allowing light of a first wavelength to pass through and a second filter CF2 for allowing light of a second wavelength to pass through. For example, the light of the first wavelength can be red light, and the light of the second wavelength can be green light.

[0107] Exemplarily, the color filters CF of multiple colors can further include a third filter CF3 for allowing light of a third wavelength to pass through. For example, the light of the third wavelength can be blue light.

[0108] Exemplarily, the display substrate 100 can further include a second planarization layer PLN2 disposed on the side of the color filter layer 3 away from the substrate 1, and a plurality of lenses 5 disposed on the side of the second planarization layer PLN2 away from the substrate 1. The plurality of lenses 5 are disposed corresponding to the plurality of color filters CF, respectively.

[0109] Exemplarily, the plurality of lenses 5 can be disposed at intervals. The orthographic projection of the lens 5 on the substrate 1 at least partially overlaps with the orthographic projection of the corresponding color filter CF on the substrate 1. For example, the area of the overlapping part of the lens 5 and the corresponding color filter CF projection is more than 2 / 3 of the area of the lens 5. For another example, the orthographic projection of the lens 5 on the substrate 1 can fall within the orthographic projection of the corresponding color filter CF on the substrate 1. Through such a design, it can be ensured that most of the light emitted by the light emitting structure EL after being filtered by the color filter CF can be converged by the lens 5, thereby improving the brightness of the display substrate.

[0110] Exemplarily, the central axis L3 of the color filter CF can coincide with the central axis L1 of the corresponding light emitting structure EL. Alternatively, the central axis L3 of the color filter CF can coincide with the central axis L2 of the corresponding lens 5. Alternatively, the central axis L3 of the color filter CF can be located between the central axis L1 of the corresponding light emitting structure EL and the central axis L2 of the corresponding lens 5.

[0111] It should be noted that the central axis is a virtual straight line that divides an object into two symmetrical parts. Alternatively, the central axis is a virtual straight line that passes through the center point of an object and is perpendicular to the plane in which the object is located. In a three-dimensional space, the central axis is a central symmetry plane or a central symmetry axis. For example, the central axis of the color filter can be a virtual straight line that passes through the center point of the color filter and is perpendicular to the plane in which the color filter is located. In some embodiments of the present disclosure, the color filter, the light emitting structure, and the lens are disposed at intervals along the light emitting direction, and the central axis of the color filter can be parallel to the light emitting direction.

[0112] Through such a design, most of the white light emitted by the light emitting structure EL can form light of a specific color through the color filter CF, and then be converged by the lens 5 to the area above the light emitting structure EL, thereby adjusting the angle of the emitted light, reducing the color crosstalk between adjacent sub-pixels, and being conducive to improving the display effect of the display substrate.

[0113] Exemplarily, the display substrate 100 can further include an optical adhesive layer 6 and a cover plate 7 located on the side of the plurality of lenses 5 away from the substrate 1. For example, the material of the optical adhesive layer 6 can be an OCR (Optical Clear Resin) patch adhesive.

[0114] FIG. 3 is a schematic cross-sectional view of a display substrate taken along line AA' in FIG. 1 according to an embodiment of the present disclosure; and FIG. 4 is a schematic view of the relationship between the light-emitting angle and the luminance decay of different color sub-pixels in a display substrate according to an embodiment of the present disclosure.

[0115] In some embodiments of the present disclosure, the plurality of sub-pixels are arrayed on the display substrate and present a plurality of light-emitting regions arrayed on the light-emitting surface. At least part of the sub-pixels include a plurality of components such as a light-emitting structure EL, a color filter CF, and a lens 5, and emit light of a plurality of colors at the light-emitting region of the sub-pixel, thereby achieving different implementation effects. Exemplarily, one sub-pixel can include one light-emitting structure EL, one color filter CF, and one lens 5, and the light emitted by the light-emitting structure EL is filtered by the color filter CF and then converged by the lens 5 to the light-emitting region of the sub-pixel, so that light of a corresponding color can be emitted at the light-emitting region of the sub-pixel. In embodiments of the present disclosure, the light-emitting structure EL, the color filter CF, and the lens 5 included in the same sub-pixel are correspondingly arranged, and the light-emitting structure EL in the same sub-pixel is referred to as the light-emitting structure corresponding to the color filter CF in the sub-pixel; and the lens 5 in the same sub-pixel is referred to as the lens corresponding to the color filter CF in the sub-pixel. For example, referring to FIG. 3, the first light-emitting structure EL1, the first color filter CF1, and the first lens 51 are correspondingly arranged in the first color sub-pixel, and therefore the first light-emitting structure EL1 is referred to as the light-emitting structure corresponding to the first color filter CF1, and the first lens 51 is referred to as the lens corresponding to the first color filter CF1. Similarly, the second light-emitting structure EL2, the second color filter CF2, and the second lens 52 are correspondingly arranged in the second color sub-pixel, and therefore the second light-emitting structure EL2 is referred to as the light-emitting structure corresponding to the second color filter CF2, and the second lens 52 is referred to as the lens corresponding to the second color filter CF2. The third light-emitting structure EL3, the third color filter CF3, and the third lens 53 are correspondingly arranged in the third color sub-pixel, and therefore the third light-emitting structure EL3 is referred to as the light-emitting structure corresponding to the third color filter CF3, and the third lens 53 is referred to as the lens corresponding to the third color filter CF3.

[0116] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 3, the central axis L2 of the lens 5 is offset from the central axis L1 of the corresponding light-emitting structure EL by an offset distance SH. In some embodiments, the central axis L3 of the color filter CF coincides with the central axis L1 of the light-emitting structure EL, and thus the central axis L2 of the lens 5 is also offset from the central axis L3 of the corresponding color filter CF by the same offset distance SH. By such design, the change of the main light angle CRA of each sub-pixel can be realized, thereby realizing angle customization.

[0117] Exemplarily, in some embodiments, referring to FIG. 3, the offset distances SH corresponding to sub-pixels of different colors are equal. For example, in the first color sub-pixel sp1, the central axis L11 of the first light-emitting structure EL1 corresponding to the first filter CF1 is offset from the central axis L21 of the first lens 51 corresponding to the first filter CF1 by a first offset distance SH1. In the second color sub-pixel sp2, the central axis L12 of the second light-emitting structure EL2 corresponding to the second filter CF2 is offset from the central axis L22 of the second lens 52 corresponding to the second filter CF2 by a second offset distance SH2. In the third color sub-pixel sp3, the central axis L13 of the third light-emitting structure EL3 corresponding to the third filter CF3 is offset from the central axis L23 of the third lens 53 corresponding to the third filter CF3 by a third offset distance SH3. By designing the central axis L2 of the lens 5 in at least part of the sub-pixels to be offset from the central axis L1 of the light-emitting structure EL of the sub-pixel by an offset distance SH, angle customization can be realized.

[0118] The inventors have found through research that, due to the strong micro-cavity architecture design of the pixel units in the display substrate, the bottom light-emitting intensity of sub-pixels of different colors is different. When the sub-pixels of different colors are designed with the same offset distance SH, the customized angle difference between the sub-pixels of different colors is caused, thereby causing the color deviation problem at the customized angle. For example, referring to FIGS. 3 and 4, the horizontal coordinate in FIG. 4 is different light-emitting angles, and the vertical coordinate is the luminance of the sub-pixels of different colors corresponding to different light-emitting angles, wherein the horizontal coordinate angle corresponding to the highest luminance point is the main light angle CRA of the corresponding sub-pixel. By comparing the luminance decay curves of the red sub-pixel, the green sub-pixel and the blue sub-pixel with the light-emitting angle, it can be known that, in the case of the same offset distance SH design, the main light angle R-CRA of the red sub-pixel is greater than the main light angle B-CRA of the blue sub-pixel, and the main light angle B-CRA of the blue sub-pixel is greater than the main light angle G-CRA of the green sub-pixel. Due to the difference in the main light angles of the sub-pixels of different colors, the difference in the RGB customized angles when synthesizing white light will cause the synthesized white light to be red or purple, thereby reducing the display effect of the OLED display device.

[0119] FIG. 5A is a schematic cross-sectional view of a display substrate taken along line AA' in FIG. 1 according to an embodiment of the present disclosure; FIG. 5B is a partial enlarged view according to the dashed box S1 in FIG. 5A; and FIG. 5C is a partial enlarged view according to the dashed box S2 in FIG. 5A.

[0120] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 5A, in the first color sub-pixel sp1, the central axis L11 of the first light-emitting structure EL1 corresponding to the first filter CF1 is offset from the central axis L21 of the first lens 51 corresponding to the first filter CF1 by a first offset distance SH1. In the second color sub-pixel sp2, the central axis L12 of the second light-emitting structure EL2 corresponding to the second filter CF2 is offset from the central axis L22 of the second lens 52 corresponding to the second filter CF2 by a second offset distance SH2. The first offset distance SF1 is not equal to the second offset distance SH2.

[0121] Exemplarily, in the third color sub-pixel sp3, the central axis L13 of the third light-emitting structure EL3 corresponding to the third filter CF3 is offset from the central axis L23 of the third lens 53 corresponding to the third filter CF3 by a third offset distance SH3. The third offset distance SH3 is not equal to the first offset distance SH1. And the third offset distance SH3 is not equal to the second offset distance SH1.

[0122] By differentiating the offset distances SH of the lenses of different sub-pixels, the control of the main light angles CRA of different sub-pixels can be realized, so that better display effect can be achieved.

[0123] In some embodiments, the pixel unit can adopt a microcavity structure to adjust the light-emitting intensity of different sub-pixels. For example, in combination with reference to FIGS. 5A-5C, the display substrate can further include a reflective layer 8 located on the side of the light-emitting structure EL close to the substrate substrate 1 and a microcavity adjusting layer 9 located on the side of the reflective layer 8 away from the substrate substrate 1. The light-emitting structure EL includes a first electrode 10, a light-emitting layer 11 and a second electrode 12 in turn away from the substrate substrate 1. The adjacent sub-pixels further include a pixel definition layer PDL for defining a plurality of sub-pixels. The first electrode 10 can be an anode, and the second electrode 12 can be a cathode. The reflective layer 8 can include a single layer of metal or a stack of multiple layers of metal. For example, the reflective layer 8 can include a stack combination of metal titanium and metal aluminum. The material of the first electrode 10 can include a transparent conductive material such as ITO, and the material of the second electrode 12 can include a metal such as silver, aluminum or an alloy such as magnesium-aluminum alloy, magnesium-silver alloy. The distance between the second electrode 12 of the light-emitting structure in the sub-pixel and the corresponding reflective layer 8 can be adjusted by changing the thickness of the microcavity adjusting layer 9, so that the light-emitting intensity of the sub-pixel can be adjusted.

[0124] Exemplarily, when the distance h between the reflective layer 8 and the second electrode 12 in the light-emitting region satisfies:

[0125] wherein h is the cavity length, n is a positive integer, N is the effective refractive index in the microcavity, and λ is the center wavelength of the corresponding sub-pixel, so that the light emission intensity of the sub-pixel can be enhanced.

[0126] For example, referring to FIGS. 5A and 5B, the first color sub-pixel sp1 includes a first light-emitting structure EL1, and the distance from the second electrode 121 of the first light-emitting structure EL1 to the corresponding reflective layer 81 is h1. The second color sub-pixel sp2 includes a second light-emitting structure EL2, and the distance from the second electrode 122 of the second light-emitting structure EL2 to the corresponding reflective layer 82 is h2, wherein h1 is greater than h2. The first color sub-pixel sp1 emits light of a first wavelength, and the second color sub-pixel sp2 emits light of a second wavelength. The first offset distance SH1 is less than the second offset distance SH2. For example, the first color sub-pixel sp1 emits red light, and the second color sub-pixel sp2 emits green light. By designing the first offset distance SH1 and the second offset distance SH2, the main light angle of the first color sub-pixel sp1 and the main light angle of the second color sub-pixel sp2 can be adjusted so that the main light angle of the first color sub-pixel sp1 is approximately equal to the main light angle of the second color sub-pixel sp2.

[0127] For example, referring to FIGS. 5A and 5C, the second color sub-pixel sp2 includes a second light-emitting structure EL2, and the distance from the second electrode 122 of the second light-emitting structure EL2 to the corresponding reflective layer 82 is h2. The third color sub-pixel sp3 includes a third light-emitting structure EL3, and the distance from the second electrode 123 of the third light-emitting structure EL3 to the corresponding reflective layer 83 is h3, wherein h2 is greater than h3. The second color sub-pixel sp2 emits light of a second wavelength, and the third color sub-pixel sp3 emits light of a third wavelength. The second offset distance SH2 is less than the third offset distance SH3. For example, the second color sub-pixel sp2 emits green light, and the third color sub-pixel sp3 emits blue light. By designing the second offset distance SH2 and the third offset distance SH3, the main light angle of the second color sub-pixel sp2 and the main light angle of the third color sub-pixel sp3 can be adjusted so that the main light angle of the second color sub-pixel sp2 is approximately equal to the main light angle of the third color sub-pixel sp3.

[0128] In some embodiments of the present disclosure, by differentiating the offset distance SH of the lens of the sub-pixel of different colors through the combination of the light-out intensity of the underlying layer of the sub-pixel of different colors, the chief ray angle CRA of the sub-pixel of different colors can be approximately equal, for example, the chief ray angle R-CRA of the red sub-pixel is approximately equal to the chief ray angle B-CRA of the blue sub-pixel, and the chief ray angle B-CRA of the blue sub-pixel is approximately equal to the chief ray angle G-CRA of the green sub-pixel. For example, it should be noted that "approximately equal" here refers to the ratio of the chief ray angle CRA of each sub-pixel being between 0.8-1.2.

[0129] Through such design, the color deviation phenomenon when the sub-pixels of different colors are combined to synthesize white light can be slowed down or eliminated, which is beneficial to improve the display effect of the display substrate.

[0130] FIG. 6 is a schematic cross-sectional view of pixel units at different image heights in a display substrate according to an embodiment of the present disclosure.

[0131] For example, in some embodiments of the present disclosure, with reference to FIG. 6, the display substrate 100 includes a plurality of pixel units at different image heights. The image height is the distance from the center of the display area of the display substrate 100 to the edge of the display area. For example, the distance of 1 mm from the center of the display substrate 100 outwardly is defined as the image height of 1 mm.

[0132] For example, the plurality of pixel units includes a first pixel unit PX1 at a first image height O1 and a second pixel unit PX2 at a second image height O2. The first image height O1 is less than the second image height O2. That is, the second pixel unit PX2 is farther from the center of the display substrate 100 than the first pixel unit PX1.

[0133] For example, with continued reference to FIG. 6, the first offset distance SH11 of the lens of the first color sub-pixel sp11 in the first pixel unit PX1 is less than the first offset distance SH12 of the lens of the first color sub-pixel sp12 in the second pixel unit PX2. And / or, the second offset distance SH21 of the lens of the second color sub-pixel sp21 in the first pixel unit PX1 is less than the second offset distance SH22 of the lens of the second color sub-pixel sp22 in the second pixel unit PX2. And / or, the third offset distance SH31 of the lens of the third color sub-pixel sp31 in the first pixel unit PX1 is less than the third offset distance SH32 of the lens of the third color sub-pixel sp32 in the second pixel unit PX2.

[0134] By differentiating the offset distance SH of the lens of each sub-pixel in the pixel units at different image heights, the chief ray angle CRA of the sub-pixel at different image heights can be differentiated and adjusted, which can improve the color deviation problem and is beneficial to improve the display effect of the display substrate.

[0135] In embodiments of the present disclosure, in the same pixel unit PX, the difference between the third offset distance SH3 and the first offset distance SH1 is a first offset difference value. The difference between the third offset distance SH3 and the second offset distance SH2 is a second offset difference value. The difference between the second offset distance SH2 and the first offset distance SH1 is a third offset difference value.

[0136] In some embodiments, the first offset difference value D11 in the first pixel unit PX1 is substantially equal to the first offset difference value D12 in the second pixel unit PX2. For example, referring to FIG. 6, the first offset difference value D11 in the first pixel unit PX1 is equal to the difference between the third offset distance SH31 corresponding to the third color sub-pixel sp31 in the first pixel unit PX1 and the first offset distance SH11 corresponding to the first color sub-pixel sp11 in the first pixel unit PX1, i.e., D11 = SH31 - SH11. The first offset difference value D12 in the second pixel unit PX2 is equal to the difference between the third offset distance SH32 corresponding to the third color sub-pixel sp32 in the second pixel unit PX2 and the first offset distance SH12 corresponding to the first color sub-pixel sp12 in the second pixel unit PX2, i.e., D12 = SH32 - SH12. Exemplarily, D11 is substantially equal to D12. It should be noted that “substantially equal” herein means that the ratio of D11 to D12 is within the range of 0.8 to 1.2.

[0137] In some embodiments, the second offset difference value D21 in the first pixel unit PX1 is based on being equal to the second offset difference value D22 in the second pixel unit PX2. For example, continuing to refer to FIG. 6, the second offset difference value D21 in the first pixel unit PX1 is equal to the difference between the third offset distance SH31 corresponding to the third color sub-pixel sp31 in the first pixel unit PX1 and the second offset distance SH21 corresponding to the second color sub-pixel sp21 in the first pixel unit PX1, i.e., D21 = SH31 - SH21. The second offset difference value D22 in the second pixel unit PX2 is equal to the difference between the third offset distance SH32 corresponding to the third color sub-pixel sp32 in the second pixel unit PX2 and the second offset distance SH22 corresponding to the second color sub-pixel sp22 in the second pixel unit PX2, i.e., D22 = SH32 - SH22. Exemplarily, D21 is substantially equal to D22. It should be noted that “substantially equal” herein means that the ratio of D21 to D22 is within the range of 0.8 to 1.2.

[0138] In some embodiments, the third offset difference value D31 in the first pixel unit PX1 is substantially equal to the third offset difference value D32 in the second pixel unit PX2. For example, continuing to refer to FIG. 6, the third offset difference value D31 in the first pixel unit PX1 is equal to the difference between the second offset distance SH21 corresponding to the second color sub-pixel sp21 in the first pixel unit PX1 and the first offset distance SH11 corresponding to the first color sub-pixel sp11 in the first pixel unit PX1, i.e., D31 = SH21 - SH11. The third offset difference value D32 in the second pixel unit PX2 is equal to the difference between the second offset distance SH22 corresponding to the second color sub-pixel sp22 in the second pixel unit PX2 and the first offset distance SH12 corresponding to the first color sub-pixel sp12 in the second pixel unit PX2, i.e., D32 = SH22 - SH12. Exemplarily, D31 is substantially equal to D32. It should be noted that “substantially equal” herein means that the ratio of D31 to D32 is within the range of 0.8 to 1.2.

[0139] By designing the difference values of the offset distances of the lenses of the different color sub-pixels in the pixel units at different image heights, for example, the first offset difference value D11 in the first pixel unit PX1 is equal to the first offset difference value D12 in the second pixel unit PX2, and / or the second offset difference value D21 in the first pixel unit PX1 is equal to the second offset difference value D22 in the second pixel unit PX2, the process difficulty can be reduced, and meanwhile, the color cast problem of the display substrate can be improved.

[0140] FIG. 7 is a schematic cross-sectional view of pixel units at different image heights in a display substrate according to an embodiment of the present disclosure.

[0141] Exemplarily, in some embodiments of the present disclosure, referring to FIG. 7, the display substrate 100 includes a plurality of pixel units at different image heights. For example, the plurality of pixel units includes a first pixel unit PX1 at a first image height O1 and a second pixel unit PX2 at a second image height O2.

[0142] Exemplarily, continuing to refer to FIG. 7, the first offset distance SH11 of the lens of the first color sub-pixel sp11 in the first pixel unit PX1 is less than the first offset distance SH12 of the lens of the first color sub-pixel sp12 in the second pixel unit PX2. And / or, the second offset distance SH21 of the lens of the second color sub-pixel sp21 in the first pixel unit PX1 is less than the second offset distance SH22 of the lens of the second color sub-pixel sp22 in the second pixel unit PX2. And / or, the third offset distance SH31 of the lens of the third color sub-pixel sp31 in the first pixel unit PX1 is less than the third offset distance SH32 of the lens of the third color sub-pixel sp32 in the second pixel unit PX2.

[0143] By differentiating the offset distance SH of the lens of each sub-pixel in the pixel unit at different image heights, the main light angle CRA of the sub-pixels at different image heights can be differentiated and adjusted, the color cast problem of the display substrate can be improved, and the display effect of the display substrate can be improved.

[0144] In an embodiment of the present disclosure, in the same pixel unit PX, the difference between the third offset distance SH3 and the first offset distance SH1 is a first offset difference value. The difference between the third offset distance SH3 and the second offset distance SH2 is a second offset difference value. The difference between the second offset distance SH2 and the first offset distance SH1 is a third offset difference value.

[0145] In some embodiments, referring to FIG. 7, the first offset difference value D11 in the first pixel unit PX1 is smaller than the first offset difference value D12 in the second pixel unit PX2. Wherein, D11 = SH31-SH11, D12 = SH32-SH12.

[0146] In some embodiments, the second offset difference value D21 in the first pixel unit PX1 is smaller than the second offset difference value D22 in the second pixel unit PX2. Wherein, D21 = SH31-SH21, D22 = SH32-SH22.

[0147] In some embodiments, the third offset difference value D31 in the first pixel unit PX1 is smaller than the third offset difference value D32 in the second pixel unit PX2. Wherein, D31 = SH21-SH11, D32 = SH22-SH12.

[0148] In some embodiments of the present disclosure, by differentiating the offset distance of the lens of the sub-pixels of different colors in the pixel units at different image heights, the offset distance of the lens of the sub-pixels of different colors in the pixel units at different image heights can be made inconsistent. For example, the first offset difference value, the second offset difference value and the third offset difference value corresponding to the pixel unit at a larger image height (far from the center of the display area) are greater than the first offset difference value, the second offset difference value and the third offset difference value corresponding to the pixel unit at a smaller image height (close to the center of the display area). For example, referring to FIG. 7, the first offset difference value D11 in the first pixel unit PX1 is smaller than the first offset difference value D12 in the second pixel unit PX2. And / or, the second offset difference value D21 in the first pixel unit PX1 is smaller than the second offset difference value D22 in the second pixel unit PX2. And / or, the third offset difference value D31 in the first pixel unit PX1 is smaller than the third offset difference value D32 in the second pixel unit PX2. By such design, it can be ensured that the edge of the display substrate achieves a larger main light angle CRA, while the color cast under the custom angle can be improved, and the display effect of the display substrate can be improved.

[0149] In some embodiments, in addition to being designed differently for pixel units at different image heights in units of pixel units, the offset distances of the lenses of the plurality of sub-pixels of the display substrate can also be designed differently for pixel unit groups in units of pixel unit groups. By flexibly adjusting the offset distances of the plurality of pixel units in a pixel unit group, smooth processing of the lens offset distances can be achieved, and at the same time, the bright and dark rings or stripes caused by the jumps in the lens offset distances can be eliminated, thereby improving the overall optical display effect of the display substrate.

[0150] FIG. 8 is a cross-sectional schematic view of a pixel unit group in a display substrate according to an embodiment of the present disclosure.

[0151] For example, in some embodiments of the present disclosure, referring to FIG. 8, the display substrate can include a plurality of pixel unit groups PG. One pixel unit group PG can include M adjacent pixel units, where M is a positive integer greater than or equal to 2. For example, FIG. 8 shows that one pixel unit group PG includes two adjacent pixel units, such as the third pixel unit PX3 and the fourth pixel unit PX4. However, embodiments of the present disclosure are not limited thereto. In some embodiments, a pixel unit group PG can also include a larger number of pixel units, such as three pixel units or four pixel units.

[0152] For example, in some embodiments of the present disclosure, referring to FIG. 8, the first offset distance SH13 in the third pixel unit PX3 is not equal to the first offset distance SH14 in the fourth pixel unit PX4.

[0153] For example, in some embodiments of the present disclosure, referring to FIG. 8, the second offset distance SH23 in the third pixel unit PX3 is not equal to the second offset distance SH24 in the fourth pixel unit PX4.

[0154] For example, in some embodiments of the present disclosure, referring to FIG. 8, the third offset distance SH33 in the third pixel unit PX3 is not equal to the third offset distance SH34 in the fourth pixel unit PX4.

[0155] The pixel offset distances corresponding to different pixel units in the same pixel unit group can be the same or different. The offset distances of the lenses of different pixel unit groups and the multiple pixel units in the pixel unit groups can be flexibly set according to the position of the pixel unit group in the image height and the number of pixel units contained in the pixel unit group, so that the angle customization can be realized while eliminating the bright and dark circular rings caused by the lens offset jump, which is beneficial to improving the display effect of the display substrate.

[0156] Exemplarily, in the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value; the difference between the third offset distance and the second offset distance is a second offset difference value; and the difference between the second offset distance and the first offset distance is a third offset difference value.

[0157] In some embodiments, continuing to refer to FIG. 8, the first offset difference value D13 in the third pixel unit PX3 is equal to the difference between the third offset distance SH33 corresponding to the third pixel unit PX3 and the first offset distance SH13, that is, D13=SH33-SH13. The first offset difference value D14 in the fourth pixel unit PX4 is equal to the difference between the third offset distance SH34 corresponding to the fourth pixel unit PX4 and the first offset distance SH14, that is, D14=SH34-SH14. The first offset difference value D13 in the third pixel unit PX3 is less than the first offset difference value D14 in the fourth pixel unit PX4.

[0158] In some embodiments, continuing to refer to FIG. 8, the second offset difference value D23 in the third pixel unit PX3 is equal to the difference between the third offset distance SH33 corresponding to the third pixel unit PX3 and the second offset distance SH23, that is, D23=SH33-SH23. The second offset difference value D24 in the fourth pixel unit PX4 is equal to the difference between the third offset distance SH34 corresponding to the fourth pixel unit PX4 and the second offset distance SH24, that is, D24=SH34-SH24. The second offset difference value D23 in the third pixel unit PX3 is less than the second offset difference value D24 in the fourth pixel unit PX4.

[0159] In some embodiments, continuing to refer to FIG. 8, the third offset difference value D33 in the third pixel unit PX3 is equal to the difference between the second offset distance SH23 corresponding to the third pixel unit PX3 and the first offset distance SH13, that is, D33=SH23-SH13. The third offset difference value D34 in the fourth pixel unit PX4 is equal to the difference between the second offset distance SH24 corresponding to the fourth pixel unit PX4 and the first offset distance SH14, that is, D34=SH24-SH14. The third offset difference value D33 in the third pixel unit PX3 is less than the third offset difference value D34 in the fourth pixel unit PX4.

[0160] By flexibly designing the offset distances of the lenses corresponding to different pixel units in the same pixel unit group, the main light angles of different pixel units in the same pixel unit group can be flexibly adjusted, and more flexible angle customization can be realized.

[0161] FIG. 9 is a plan view of a display substrate according to an embodiment of the present disclosure.

[0162] For example, in some embodiments of the present disclosure, referring to FIG. 9, one pixel unit group PG can include M adjacent pixel units. M is a positive integer greater than or equal to 3. That is, one pixel unit group PG can include 3 or 4 or more adjacent pixel units. For example, one pixel unit group PG can include the i-th pixel unit PX i , the i+1-th pixel unit PX i+1 and the i+2-th pixel unit PX i+2 , where i is a positive integer greater than or equal to 1 and less than or equal to M-2. It should be noted that sequentially adjacent means that the adjacent pixel units are arranged sequentially in one direction, for example, the i-th pixel unit PX i , the i+1-th pixel unit PX i+1 and the i+2-th pixel unit PX i+2 are sequentially arranged in the first direction X. It should also be noted that the direction in which the pixel units are sequentially arranged can also be other directions, for example, the pixel units can be sequentially arranged in the second direction Y. Or the pixel units can be sequentially arranged in other directions intersecting the first direction X and the second direction Y.

[0163] In some embodiments, referring to FIG. 5A and FIG. 9, the first offset distance corresponding to the first color sub-pixel in the i-th pixel unit PX i is less than the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit PX i+1 ; and the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit PX i+1 is less than the first offset distance corresponding to the first color sub-pixel in the i+2-th pixel unit PX i+2 . And / or, the second offset distance corresponding to the second color sub-pixel in the i-th pixel unit PX i is less than the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit PX i+1 ; and the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit PX i+1 is less than the second offset distance corresponding to the second color sub-pixel in the i+2-th pixel unit PX i+2 . And / or, the third offset distance corresponding to the third color sub-pixel in the i-th pixel unit PX i is less than the third offset distance corresponding to the third color sub-pixel in the i+1-th pixel unit PX i+1The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX i+1 The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX i+2 The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX

[0164] In some embodiments, in combination with reference to FIG. 5A and FIG. 9, the first offset distance corresponding to the first color sub-pixel in the ith pixel unit PX i The first offset distance corresponding to the first color sub-pixel in the ith pixel unit PX i+1 The first offset distance corresponding to the first color sub-pixel in the ith pixel unit PX i+1 The first offset distance corresponding to the first color sub-pixel in the ith pixel unit PX i+2 The first offset distance corresponding to the first color sub-pixel in the ith pixel unit PX i The second offset distance corresponding to the second color sub-pixel in the ith pixel unit PX i+1 The second offset distance corresponding to the second color sub-pixel in the ith pixel unit PX i+1 The second offset distance corresponding to the second color sub-pixel in the ith pixel unit PX i+2 The second offset distance corresponding to the second color sub-pixel in the ith pixel unit PX i The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX i+1 The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX i+1 The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX i+2 The third offset distance corresponding to the third color sub-pixel in the ith pixel unit PX

[0165] In some embodiments of the present disclosure, the offset distances of the lenses of multiple pixel units located in the same pixel unit group can be freely adjusted and set. For example, the offset distances of the lenses in multiple adjacent pixel units in a pixel unit group can be gradually increased, or can be first increased and then decreased, or can be first decreased and then increased, or can be first increased and then decreased and then increased, or various flexible design manners, so as to realize the smooth design of the offset distances of the lenses corresponding to the multiple pixel units, eliminate the bright and dark circular rings caused by the jump of the lens offset distance, and be beneficial to improving the overall display effect of the display substrate.

[0166] Exemplarily, in the embodiments of the present disclosure, continuing to refer to FIG. 9, the display substrate includes a first pixel unit group PG1 located at a first image height O1 and a second pixel unit group PG2 located at a second image height O2, the first image height PG1 is smaller than the second image height PG2. The first offset difference values corresponding to the plurality of pixel units in the first pixel unit group PG1 are respectively smaller than the first offset difference values corresponding to the plurality of pixel units in the second pixel unit group PG2. The first offset difference value is the difference between the third offset distance SH3 and the first offset distance SH1 in the same pixel unit.

[0167] Exemplarily, the second offset difference values corresponding to the plurality of pixel units in the first pixel unit group PG1 are respectively smaller than the second offset difference values corresponding to the plurality of pixel units in the second pixel unit group PG2. The second offset difference value is the difference between the third offset distance SH3 and the second offset distance SH2 in the same pixel unit.

[0168] Exemplarily, the third offset difference values corresponding to the plurality of pixel units in the first pixel unit group are respectively smaller than the third offset difference values corresponding to the plurality of pixel units in the second pixel unit group. The third offset difference value is the difference between the second offset distance SH2 and the first offset distance SH1 in the same pixel unit.

[0169] By flexibly setting the first offset distance, the second offset distance and the third offset distance of the lens corresponding to the plurality of pixel units in the pixel unit group located at different image heights, and the first offset difference value, the second offset difference value and the third offset difference value, the offset distance of the pixel unit group far from the center of the display area can be smoothly increased, which can realize angle customization on the one hand, and can ensure that the screen edge achieves a larger chief ray angle CRA, and at the same time can avoid the bright and dark rings caused by the jump of the offset distance of the lens, thereby improving the display effect of the display substrate.

[0170] Exemplarily, the offset distances of the lenses of at least part of the sub-pixels can be different. Since the offset distances of the lenses are different, the gaps between the adjacent lenses can be inconsistent, thereby adversely affecting the uniformity of the display substrate.

[0171] In some embodiments of the present disclosure, in order to reduce the adverse effects caused by the inconsistent gaps between the lenses, the color filters corresponding to the sub-pixels of different colors can be adaptively offset.

[0172] Exemplarily, the offset distances of the center axes of the color filters corresponding to the sub-pixels of different colors and the center axes of the corresponding light emitting structures can be different.

[0173] It should be noted that in the embodiments of the present disclosure, at least part of the light emitting structure is located in the opening region of the sub-pixel, and the light emitting structure emits light of multiple colors in the opening region of the sub-pixel. The region where the light emitting structure emits light in the opening region of the sub-pixel is the display region of the sub-pixel for displaying images. In some embodiments, the light emitting structure can coincide with the opening region of the sub-pixel. The central axis of the light emitting structure can coincide with the central axis of the opening of the sub-pixel. In some embodiments, the light emitting structure can include an effective light emitting part located in the opening region of the sub-pixel and an auxiliary part located outside the opening region of the sub-pixel. The central axis of the light emitting structure can be the central axis of the effective light emitting part of the light emitting structure. The central axis of the effective light emitting part of the light emitting structure can coincide with the central axis of the opening of the sub-pixel. FIG. 10A is a schematic cross-sectional view of a pixel unit of a display substrate according to an embodiment of the present disclosure; FIG. 10B is a schematic cross-sectional view of a pixel unit of a display substrate according to another embodiment of the present disclosure.

[0174] For example, the color filters corresponding to adjacent sub-pixels can be partially overlapped, so as to adjust the brightness of different sub-pixels and improve the display uniformity of the display substrate.

[0175] In some embodiments, referring to FIG. 10A, the offset distances of the central axes of the color filters corresponding to sub-pixels of different colors and the central axes of the corresponding light emitting structures can be different. For example, the central axis L31 of the first color filter CF1 in the first color sub-pixel sp1 is offset from the central axis L11 of the corresponding first light emitting structure EL1 by a fourth offset distance SH4, and the central axis L32 of the second color filter CF2 in the second color sub-pixel sp2 is offset from the central axis L12 of the corresponding second light emitting structure EL2 by a fifth offset distance SH5. For example, the fourth offset distance SH4 and the fifth offset distance SH5 are not equal.

[0176] In some embodiments, continuing to refer to FIG. 10A, at least part of the first color filter CF1 and the second color filter CF2 are partially overlapped, and the overlap width of the first color filter CF1 and the second color filter CF2 is a first width d1. At least part of the second color filter CF2 and the third color filter CF3 are partially overlapped, and the overlap width of the second color filter CF2 and the third color filter CF3 is a second width d2. At least part of the third color filter CF3 and the first color filter CF1 are partially overlapped, and the overlap width of the third color filter CF3 and the first color filter CF1 is a third width d3. For example, the first width d1 is greater than the second width d2; and / or, the first width d1 is greater than the third width d3.

[0177] By adaptively setting the offset of the color filter, the color filters corresponding to part of the adjacent sub-pixels can be partially overlapped, so as to adjust the light emitting intensity of different sub-pixels.

[0178] The overlapping widths between the color filters corresponding to the sub-pixels of different colors can be different, and correspondingly, the adjusting effects of the color filters on the light emitting intensities of the sub-pixels of different colors are also different. The overlapping widths of the color filters of adjacent sub-pixels can be flexibly designed in combination with the light emitting intensities of the light emitting structures and the condensing effects of the lenses, which is beneficial to improving the uniformity of the display substrate.

[0179] Exemplarily, in some embodiments of the present disclosure, the lens 5 can be designed to be offset relative to the light emitting structure EL, and at the same time, the color filter can also be designed to be offset relative to the light emitting structure EL. For example, referring to FIG. 10B, the display substrate includes a first light emitting structure EL1, a second light emitting structure EL2, and a third light emitting structure EL3. The center axis of the first light emitting structure EL1 is L11, the first light emitting structure EL1 is arranged corresponding to a first filter CF1, the center axis of the first filter CF1 is L31, and the center axis L31 of the first filter CF1 is offset from the center axis L11 of the first light emitting structure EL1 by a fourth offset distance SH4. The second light emitting structure EL2 is arranged corresponding to a second filter CF2, the center axis of the second filter CF2 is L32, and the center axis L32 of the second filter CF2 is offset from the center axis L12 of the second light emitting structure EL2 by a fifth offset distance SH5. Exemplarily, the fourth offset distance SH4 and the fifth offset distance SH5 are not equal.

[0180] The third light emitting structure EL3 is arranged corresponding to a third filter CF3, the center axis of the third filter CF3 is L33, and the center axis L33 of the third filter CF3 is offset from the center axis L13 of the third light emitting structure EL3 by a sixth offset distance SH6. Exemplarily, the sixth offset distance SH6 and the fourth offset distance SH4 are not equal; and / or, the sixth offset distance SH6 and the fifth offset distance SH5 are not equal.

[0181] Continuing to refer to FIG. 10B, a first lens 51 is arranged corresponding to the first filter CF1. A second lens 52 is arranged corresponding to the second filter CF2. A third lens 53 is arranged corresponding to the third filter CF3. The center axis L21 of the first lens 51 is offset from the center axis L11 of the first light emitting structure EL1 by a first offset distance SH1. The center axis L22 of the second lens 52 is offset from the center axis L12 of the second light emitting structure EL2 by a second offset distance SH2. Exemplarily, the first offset distance SH1 and the second offset distance SH2 are not equal.

[0182] The central axis L23 of the third lens 53 is offset from the central axis L13 of the third light emitting structure EL3 by a third offset distance SH3. Exemplarily, the third offset distance SH3 is not equal to the first offset distance SH1; and / or, the third offset distance SH3 is not equal to the second offset distance SH2.

[0183] In some embodiments, the offset distance of a lens relative to a light emitting structure can be the same as the offset distance of a color filter relative to the light emitting structure. That is, the central axis of a color filter can coincide with the central axis of a corresponding lens. For example, the central axis L31 of the first color filter CF1 can coincide with the central axis L21 of the first lens 51. For another example, the central axis L32 of the second color filter CF2 can coincide with the central axis L22 of the second lens 52. For yet another example, the central axis L33 of the third color filter CF3 can coincide with the central axis L23 of the third lens 53.

[0184] By simultaneously offsetting the lenses and the color filters, the light emitting intensity of the sub-pixels can be adjusted while achieving angle customization, which is conducive to improving display uniformity.

[0185] FIG. 11 is a flowchart of a preparation method of a display substrate according to an embodiment of the present disclosure.

[0186] Exemplarily, in an embodiment of the present disclosure, a preparation method of a display substrate is provided. In combination with reference to FIG. 1, FIG. 5A and FIG. 11, the preparation method of the display substrate can include the following steps S01-S04.

[0187] In step S01, a substrate substrate 1 is provided. For example, the substrate substrate can be a silicon-based substrate.

[0188] In step S02, a plurality of light emitting structures EL are formed on the substrate substrate 1 to form a plurality of light emitting elements corresponding to a plurality of pixel units PX. For example, the pixel unit PX can include a first color sub-pixel sp1 and a second color sub-pixel sp2.

[0189] In step S03, a color filter layer 3 is formed on a side of the light emitting structure EL away from the substrate substrate 1. The color filter layer 3 can include a plurality of color filters CF, which are respectively arranged corresponding to the plurality of light emitting structures EL. The plurality of color filters CF can include a first color filter CF1 for allowing light of a first wavelength to pass through and a second color filter CF2 for allowing light of a second wavelength to pass through.

[0190] In step S04, a plurality of lenses 5 are formed on the side of the color filter layer 3 away from the substrate 1. The plurality of lenses 5 are respectively arranged corresponding to the plurality of color filters CF. Among them, the central axis of the light emitting structure EL corresponding to the first filter CF1 is offset from the central axis of the lens 5 corresponding to the first filter CF1 by a first offset distance SH1, and the central axis of the light emitting structure EL corresponding to the second filter CF2 is offset from the central axis of the lens 5 corresponding to the second filter CF2 by a second offset distance SH2. The first offset distance SH1 and the second offset distance SH2 are not equal.

[0191] Exemplarily, the manufacturing of the plurality of lenses can be prepared by using a mask. By designing the shape and position of the pattern in the mask, the offset distance of the lens can be adjusted. The adjustment design of the offset distance of the lens can be designed in a pixel unit as a cycle, or a plurality of pixel units can form a pixel unit group, and the pixel unit group is designed as a cycle, so as to realize the flexible design of the offset distance of the lens corresponding to different pixels or different pixel unit groups.

[0192] In some embodiments, after forming the light emitting structure EL and before forming the color filter layer 3, a first planarization layer PLN1 and an encapsulation layer 2 can also be formed on the side of the light emitting structure EL away from the substrate 1.

[0193] In some embodiments, after forming the color filter layer 3 and before forming the plurality of lenses 5, a second planarization layer PLN2 can also be formed on the side of the color filter layer 3 away from the substrate 1.

[0194] In some embodiments, after forming the plurality of lenses 5, an optical adhesive layer 6 and a cover plate 7 can also be formed on the side of the plurality of lenses 5 away from the substrate 1.

[0195] FIG. 12 is a flowchart of a preparation method of a display substrate according to some other embodiments of the present disclosure.

[0196] Exemplarily, in the embodiments of the present disclosure, a preparation method of a display substrate is provided. In combination with reference to FIG. 1, FIG. 10A and FIG. 12, the preparation method of the display substrate can include the following steps S05-S08.

[0197] In step S05, a substrate is provided.

[0198] In step S06, a plurality of light emitting structures EL are formed on the substrate 1 to form a plurality of light emitting elements corresponding to a plurality of pixel units PX. For example, the pixel unit PX can include a first color sub-pixel sp1 and a second color sub-pixel sp2.

[0199] In step S07, a color filter layer 3 is formed on the side of the light emitting structure EL away from the substrate 1. The color filter layer 3 can include a plurality of color filters CF, which are respectively arranged corresponding to the plurality of light emitting structures EL. The plurality of color filters CF can include a first color filter CF1 for allowing light of a first wavelength to pass through and a second color filter CF2 for allowing light of a second wavelength to pass through. The central axis of the first color filter CF1 is offset from the central axis of the corresponding first light emitting structure EL1 by a fourth offset distance SH4. The central axis of the second color filter CF2 is offset from the central axis of the corresponding second light emitting structure EL2 by a fifth offset distance SH5. The fourth offset distance SH4 and the fifth offset distance SH5 are not equal.

[0200] In step S08, a plurality of lenses 5 are formed on the side of the color filter layer 3 away from the substrate 1. The plurality of lenses 5 are respectively arranged corresponding to the plurality of color filters CF. Among them, the central axis of the light emitting structure EL corresponding to the first color filter CF1 is offset from the central axis of the lens 5 corresponding to the first color filter CF1 by a first offset distance SH1, and the central axis of the light emitting structure EL corresponding to the second color filter CF2 is offset from the central axis of the lens 5 corresponding to the second color filter CF2 by a second offset distance SH2. The first offset distance SH1 and the second offset distance SH2 are not equal.

[0201] FIG. 13 is a structural block diagram of a display device according to an embodiment of the present disclosure.

[0202] Optionally, the embodiments of the present disclosure also provide a display device. Referring to FIG. 13, the display device 200 can include the display substrate 100 described above. The display device 200 can include, but is not limited to, electronic paper, mobile phones, tablets, displays, notebook computers, digital photo frames, navigation devices, and any product or component with display function. It should be understood that the display device has the same beneficial effects as the display substrate provided by the foregoing embodiments.

[0203] Although some embodiments of the general concept of the present disclosure have been shown and described, it will be understood by those having ordinary skill in the art that changes can be made to these embodiments without departing from the principles and spirit of the general concept of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims

1. A display substrate, characterized by, The display substrate comprises: a substrate substrate; a plurality of pixel units located on the substrate substrate, the pixel units being arranged in an array on the substrate substrate along a first direction and a second direction intersecting the first direction, wherein the pixel units comprise first color sub-pixels and second color sub-pixels; a plurality of light-emitting structures located on the substrate substrate; and a color filter layer located on a side of the light-emitting structure away from the substrate substrate, wherein the color filter layer comprises a plurality of color filters, the plurality of color filters are respectively arranged corresponding to the plurality of light-emitting structures, the plurality of color filters comprise first filters for allowing light of a first wavelength to pass through and second filters for allowing light of a second wavelength to pass through; and a plurality of lenses located on a side of the color filter layer away from the substrate substrate, the plurality of lenses are respectively arranged corresponding to the plurality of color filters, wherein a central axis of the light-emitting structure corresponding to the first filter is offset from a central axis of the lens corresponding to the first filter by a first offset distance, a central axis of the light-emitting structure corresponding to the second filter is offset from a central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance. 2.The display substrate of claim 1, wherein, The plurality of color filters further comprise third filters for allowing light of a third wavelength to pass through, a central axis of the light-emitting structure corresponding to the third filter is offset from a central axis of the lens corresponding to the third filter by a third offset distance, the third offset distance is not equal to the first offset distance, and the third offset distance is not equal to the second offset distance. 3.The display substrate of claim 2, wherein, The display substrate further comprises a reflective layer located on a side of the light-emitting structure close to the substrate substrate, the light-emitting structure comprises a first electrode, a light-emitting layer and a second electrode in turn away from the substrate substrate, wherein a distance between the reflective layer and the second electrode corresponding to the first color sub-pixel is greater than a distance between the reflective layer and the second electrode corresponding to the second color sub-pixel, a wavelength of the light of the first wavelength is greater than a wavelength of the light of the second wavelength, and the first offset distance is less than the second offset distance; and / or a distance between the reflective layer and the second electrode corresponding to the second color sub-pixel is greater than a distance between the reflective layer and the second electrode corresponding to the third color sub-pixel, a wavelength of the light of the second wavelength is greater than a wavelength of the light of the third wavelength, and the second offset distance is less than the third offset distance. 4.The display substrate according to claim 2 or 3, wherein, The plurality of pixel units comprise first pixel units located at a first image height and second pixel units located at a second image height, the first image height is less than the second image height, the image height is a distance from a center of a display area of the display substrate to an edge of the display area, The first offset distance corresponding to the first color sub-pixel in the first pixel unit is smaller than the first offset distance corresponding to the first color sub-pixel in the second pixel unit; and / or, the second offset distance corresponding to the second color sub-pixel in the first pixel unit is smaller than the second offset distance corresponding to the second color sub-pixel in the second pixel unit; and / or the third offset distance corresponding to the third color sub-pixel in the first pixel unit is smaller than the third offset distance corresponding to the third color sub-pixel in the second pixel unit. 5.The display substrate of any one of claims 2-4, wherein, In the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value, the difference between the third offset distance and the second offset distance is a second offset difference value, and the difference between the second offset distance and the first offset distance is a third offset difference value. The first offset difference value in the first pixel unit is equal to the first offset difference value in the second pixel unit. And / or, the second offset difference value in the first pixel unit is equal to the second offset difference value in the second pixel unit. And / or, the third offset difference value in the first pixel unit is equal to the third offset difference value in the second pixel unit. 6.The display substrate of any one of claims 2-4, wherein, In the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value, the difference between the third offset distance and the second offset distance is a second offset difference value, and the difference between the second offset distance and the first offset distance is a third offset difference value. The first offset difference value in the first pixel unit is smaller than the first offset difference value in the second pixel unit. And / or, the second offset difference value in the first pixel unit is smaller than the second offset difference value in the second pixel unit. And / or, the third offset difference value in the first pixel unit is smaller than the third offset difference value in the second pixel unit. 7.The display substrate of any one of claims 2-6, wherein, The display substrate comprises a plurality of pixel unit groups, and each pixel unit group comprises M adjacent pixel units, wherein M is a positive integer greater than or equal to 2. In the M adjacent pixel units in the same pixel unit group, the first offset distance of at least one pixel unit is not equal to the first offset distance of at least another pixel unit; and / or, the second offset distance of at least one pixel unit is not equal to the second offset distance of at least another pixel unit; and / or, the third offset distance of at least one pixel unit is not equal to the third offset distance of at least another pixel unit. 8.The display substrate of claim 7, wherein, In the same pixel unit, the difference between the third offset distance and the first offset distance is a first offset difference value, the difference between the third offset distance and the second offset distance is a second offset difference value, and the difference between the second offset distance and the first offset distance is a third offset difference value. The pixel unit group comprises a third pixel unit and a fourth pixel unit adjacent to each other, wherein The first offset difference value in the third pixel unit is smaller than the first offset difference value in the fourth pixel unit; and / or, The second offset difference value in the third pixel unit is smaller than the second offset difference value in the fourth pixel unit; and / or, The third offset difference value in the third pixel unit is smaller than the third offset difference value in the fourth pixel unit. The third offset difference in the third pixel unit is less than the third offset difference in the fourth pixel unit. 9.The display substrate of any one of claims 2-6, wherein, The display substrate comprises a plurality of pixel unit groups, each pixel unit group comprises M adjacent pixel units, M is a positive integer greater than or equal to 3; each pixel unit group comprises an i-th pixel unit, an i+1-th pixel unit and an i+2-th pixel unit which are adjacent in turn, wherein i is a positive integer greater than or equal to 1 and less than or equal to M-2, wherein, The first offset distance corresponding to the first color sub-pixel in the i-th pixel unit is less than the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit; and the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit is less than the first offset distance corresponding to the first color sub-pixel in the i+2-th pixel unit; and / or, The second offset distance corresponding to the second color sub-pixel in the i-th pixel unit is less than the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit; and the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit is less than the second offset distance corresponding to the second color sub-pixel in the i+2-th pixel unit; and / or, The third offset distance corresponding to the third color sub-pixel in the i-th pixel unit is less than the third offset distance corresponding to the third color sub-pixel in the i+1-th pixel unit; and the third offset distance corresponding to the third color sub-pixel in the i+1-th pixel unit is less than the third offset distance corresponding to the third color sub-pixel in the i+2-th pixel unit.

10. The display substrate according to any one of claims 2-6, wherein, The display substrate comprises a plurality of pixel unit groups, each pixel unit group comprises M adjacent pixel units, M is a positive integer greater than or equal to 3; each pixel unit group comprises an i-th pixel unit, an i+1-th pixel unit and an i+2-th pixel unit which are adjacent in turn, wherein i is a positive integer greater than or equal to 1 and less than or equal to M-2, wherein, The first offset distance corresponding to the first color sub-pixel in the i-th pixel unit is less than the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit; and the first offset distance corresponding to the first color sub-pixel in the i+1-th pixel unit is greater than the first offset distance corresponding to the first color sub-pixel in the i+2-th pixel unit; and / or, The second offset distance corresponding to the second color sub-pixel in the i-th pixel unit is less than the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit; and the second offset distance corresponding to the second color sub-pixel in the i+1-th pixel unit is greater than the second offset distance corresponding to the second color sub-pixel in the i+2-th pixel unit; and / or, The third offset distance corresponding to the third color sub-pixel in the i-th pixel unit is less than the third offset distance corresponding to the third color sub-pixel in the i+1-th pixel unit; and the third offset distance corresponding to the third color sub-pixel in the i+1-th pixel unit is greater than the third offset distance corresponding to the third color sub-pixel in the i+2-th pixel unit. 11.The display substrate of any one of claims 7-10, wherein, The display substrate includes a first pixel unit group located at a first image height and a second pixel unit group located at a second image height, wherein the first image height is smaller than the second image height. The first offset difference values ​​corresponding to multiple pixel units within the first pixel unit group are respectively less than the first offset difference values ​​corresponding to multiple pixel units within the corresponding second pixel unit group; and / or, The second offset differences corresponding to multiple pixel units within the first pixel unit group are respectively less than the second offset differences corresponding to multiple pixel units within the second pixel unit group; and / or, The third offset difference corresponding to multiple pixel units in the first pixel unit group is less than the third offset difference corresponding to multiple pixel units in the corresponding second pixel unit group. 12.The display substrate of any one of claims 1-11, wherein, The orthogonal projection of the lens onto the substrate at least partially overlaps with the orthogonal projection of the corresponding color filter onto the substrate.

13. The display substrate according to any one of claims 1-12, wherein, The orthographic projection of the light-emitting structure on the substrate falls within the orthographic projection of the corresponding color filter on the substrate. 14.The display substrate of any one of claims 1-13, wherein, The central axis of the color filter coincides with the central axis of the corresponding light-emitting structure; or... The central axis of the color filter coincides with the central axis of the corresponding lens; or... The central axis of the color filter is located between the central axis of the corresponding light-emitting structure and the central axis of the corresponding lens. 15.The display substrate of claim 2, wherein, At least partially adjacent first and second filters partially overlap, with an overlap width of a first width; at least partially adjacent second and third filters partially overlap, with an overlap width of a second width; at least partially adjacent third and first filters partially overlap, with an overlap width of a third width. Wherein, the first width is greater than the second width; and / or, The first width is greater than the third width.

16. A display substrate, comprising: include: Substrate; A plurality of pixel units are located on the substrate, the pixel units being arranged in an array on the substrate along a first direction and a second direction, the first direction and the second direction intersecting, wherein the pixel unit includes a first color sub-pixel and a second color sub-pixel; Multiple light-emitting structures located on the substrate; and A color filter layer located on the side of the light-emitting structure away from the substrate, wherein the color filter layer includes a plurality of color filters, the plurality of color filters being respectively disposed corresponding to the plurality of light-emitting structures, the plurality of color filters including a first filter for allowing light of a first wavelength to pass through and a second filter for allowing light of a second wavelength to pass through, wherein the central axis of the first filter is offset from the central axis of the corresponding light-emitting structure by a fourth offset distance, the central axis of the second filter is offset from the central axis of the corresponding light-emitting structure by a fifth offset distance, the fourth offset distance and the fifth offset distance are not equal; and a plurality of lenses located on a side of the color filter layer away from the substrate, the plurality of lenses being respectively arranged corresponding to the plurality of color filters, wherein a central axis of the light emitting structure corresponding to the first filter is offset from a central axis of the lens corresponding to the first filter by a first offset distance, a central axis of the light emitting structure corresponding to the second filter is offset from a central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance. 17.The display substrate of claim 16, wherein, the plurality of color filters further comprising a third filter for allowing light of a third wavelength to pass through, a central axis of the light emitting structure corresponding to the third filter is offset from a central axis of the lens corresponding to the third filter by a third offset distance, the third offset distance is not equal to the first offset distance, and the third offset distance is not equal to the second offset distance; and / or, the central axis of the third filter is offset from the central axis of the light emitting structure corresponding to the third filter by a sixth offset distance, the sixth offset distance is not equal to the fourth offset distance, and the sixth offset distance is not equal to the fifth offset distance. 18.The display substrate of claim 17, wherein, the central axis of the color filter coincides with the central axis of the lens corresponding to the color filter.

19. A method for preparing a display substrate, characterized in that, comprising: providing a substrate; forming a plurality of light emitting structures on the substrate to form a plurality of light emitting elements corresponding to a plurality of pixel units, wherein the pixel units comprise first color sub-pixels and second color sub-pixels; forming a color filter layer on a side of the light emitting structures away from the substrate, wherein the color filter layer comprises a plurality of color filters, the plurality of color filters being respectively arranged corresponding to the plurality of light emitting structures, the plurality of color filters comprising a first filter for allowing light of a first wavelength to pass through and a second filter for allowing light of a second wavelength to pass through; and forming a plurality of lenses on a side of the color filter layer away from the substrate, the plurality of lenses being respectively arranged corresponding to the plurality of color filters, wherein a central axis of the light emitting structure corresponding to the first filter is offset from a central axis of the lens corresponding to the first filter by a first offset distance, a central axis of the light emitting structure corresponding to the second filter is offset from a central axis of the lens corresponding to the second filter by a second offset distance, and the first offset distance is not equal to the second offset distance.

20. A display device comprising: The display device comprises the display substrate as claimed in any one of claims 1-18.

Images