Display substrate, preparation method thereof and display device

Abstract

A display substrate, a preparation method therefor, and a display device, the display substrate comprising a light condensation layer (106) disposed on a side of a color film layer (105) away from a substrate (101), the light condensation layer (106) being configured to gather light emitted from the color film layer (105); the light gathering layer (106) at least comprises two adjacent convex lenses, at least one of the two adjacent convex lenses comprises a first lens part (411) and a second lens part (412) which are sequentially arranged in the direction away from the substrate (101), the second lens part (412) is hemispherical, and the two adjacent convex lenses overlap with orthographic projections of different filtering patterns on the substrate (101); a gap is formed between every two adjacent convex lenses, the side, close to the convex lens, of at least one gap is provided with a curved surface groove (82), and the gap between the orthographic projections of every two adjacent convex lenses on the substrate (101) is located in the orthographic projection of the overlapping part on the substrate (101).

Description

Display substrate and manufacturing method thereof, and display device Technical Field

[0001] The present disclosure relates to, but is not limited to, the field of display technology, and specifically to a display substrate and a preparation method thereof, and a display device. Background Art

[0002] Micro Organic Light-Emitting Diode (MicroOLED) is a micro display developed in recent years, also known as silicon-based OLED. Silicon-based OLED can not only realize active addressing of pixels, but also can realize the preparation of various functional circuits including timing control (TCON) circuit, overcurrent protection (OCP) circuit, etc. on the silicon-based substrate, which is conducive to reducing the system volume and achieving lightweight. Silicon-based OLED is prepared using the mature complementary metal oxide semiconductor (CMOS) integrated circuit process. It has the advantages of small size, high resolution (Pixels Per Inch, PPI), high refresh rate, etc., and is widely used in the field of virtual reality (VR) or augmented reality (AR) near-eye display.

[0003] Silicon-based OLEDs are usually unable to achieve high display brightness, resulting in poor display effects.

[0004] Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] In one aspect, the present disclosure provides a display substrate comprising:

[0007] substrate;

[0008] a light emitting device, disposed on one side of the substrate, the light emitting device being configured to emit light;

[0009] a color filter layer, disposed on a side of the light-emitting device away from the substrate, the color filter layer comprising at least two filter patterns; at least portions of adjacent filter patterns being stacked in a thickness direction of the substrate to form an overlapping portion;

[0010] a light-gathering layer, disposed on a side of the color filter layer away from the substrate, the light-gathering layer being configured to gather light emitted from the color filter layer;

[0011] The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion arranged in sequence along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses and different filter patterns overlap in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the substrate of the overlapping portion.

[0012] In some embodiments, the curvature radius R1 of the curved groove and the curvature radius R2 of the convex lens on the same side satisfy the following relationship: 4.5≤R2 / R1≤15.

[0013] In some embodiments, in the thickness direction of the substrate, the minimum distance between the bottom end of the curved groove and the edge of the convex lens on the same side is smaller than the minimum distance between the orthographic projections of the two adjacent convex lenses on the substrate.

[0014] In some embodiments, a minimum distance L1 between the orthographic projections of two adjacent convex lenses on the substrate is less than or equal to 0.8 micrometers and greater than or equal to 0.2 micrometers.

[0015] In some embodiments, the orthographic projection of the gap between the two adjacent convex lenses on the substrate is located in the orthographic projection of the overlapping portion on the substrate.

[0016] In some embodiments, the two adjacent convex lenses include a first convex lens and a second convex lens, the first convex lens includes a first lens portion and a second lens portion arranged in sequence along a direction away from the base, the second lens portion is hemispherical, the second convex lens includes a circular bottom surface, and the maximum thickness of the second convex lens is less than or equal to the radius of the circular bottom surface.

[0017] In some embodiments, the maximum thickness of the first convex lens is greater than the maximum thickness of the second convex lens.

[0018] In some embodiments, a difference between a maximum thickness of the first convex lens and a maximum thickness of the second convex lens is 0.4 micrometers to 0.6 micrometers.

[0019] In some embodiments, the maximum thickness of the first convex lens is 2.1 to 2.5 times the radius of the bottom surface of the first convex lens close to the substrate.

[0020] In some embodiments, the two adjacent convex lenses include a first convex lens and a second convex lens, the first convex lens includes the first lens portion and the second lens portion, the second convex lens includes a third lens portion and a fourth lens portion arranged in sequence along a direction away from the base, and the fourth lens portion is hemispherical.

[0021] In some embodiments, the orthographic projection areas of the two adjacent convex lenses on the substrate are different.

[0022] In some embodiments, the color filter layer includes a first filter pattern, a second filter pattern, and a third filter pattern. The first filter pattern is adjacent to the second filter pattern, and at least a portion of the first filter pattern and at least a portion of the second filter pattern are stacked in the thickness direction of the substrate to form a first overlapping portion. In the first overlapping portion, the first filter pattern is located on a side of the second filter pattern away from the substrate; the second filter pattern is adjacent to the third filter pattern, and at least a portion of the second filter pattern and at least a portion of the third filter pattern are stacked in the thickness direction of the substrate to form a second overlapping portion. In the second overlapping portion, the second filter pattern is located on a side of the third filter pattern away from the substrate.

[0023] In some embodiments, the first lens portion and the second lens portion are an integral structure.

[0024] In some embodiments, the first lens portion includes a first surface close to the substrate, a second surface away from the substrate, and a side surface connecting the first surface and the second surface, the second surface is a surface of the second lens portion close to the substrate, and the side surface is arc-shaped.

[0025] In some embodiments, an angle between a tangent line at the intersection of the side surface and the first surface and a plane parallel to the base is less than 90 degrees and greater than or equal to 30 degrees.

[0026] In some embodiments, a distance between the first surface of the first lens portion and the second surface of the first lens portion is 300 nanometers to 600 nanometers.

[0027] In some embodiments, a flat layer is further included, and the flat layer is located between the color filter layer and the light-gathering layer. The refractive index of the flat layer material is not greater than the refractive index of the light-gathering layer material.

[0028] In some embodiments, in a direction perpendicular to the substrate, a maximum thickness of the second lens portion is greater than a maximum thickness of the first lens portion.

[0029] In some embodiments, a minimum distance between orthographic projections of two adjacent convex lenses on the substrate is greater than or equal to a maximum thickness of the first lens portion.

[0030] On the other hand, the present disclosure further provides a display device comprising the aforementioned display substrate.

[0031] In another aspect, the present disclosure further provides a method for preparing a display substrate, comprising:

[0032] forming a light emitting device on a substrate;

[0033] forming a color filter layer on the light-emitting device, wherein the color filter layer includes at least two filter patterns; at least portions of adjacent filter patterns are stacked in a thickness direction of the substrate to form an overlapping portion;

[0034] forming a light-collecting layer on the color filter layer, wherein the light-collecting layer is configured to collect light emitted from the color filter layer;

[0035] The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion arranged in sequence along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses and different filter patterns overlap in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the substrate of the overlapping portion.

[0036] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings are used to provide an understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0038] FIG1 is a schematic diagram of a planar structure of a display substrate;

[0039] FIG2 is a schematic diagram of a cross-sectional structure of a display substrate;

[0040] FIG3 is a schematic cross-sectional view of a display substrate according to an exemplary embodiment of the present disclosure;

[0041] FIG4 is a schematic cross-sectional view of a color filter layer and a light-gathering layer in a display substrate according to an exemplary embodiment of the present disclosure;

[0042] FIG5 is a schematic diagram of a cross-sectional structure of a light-collecting layer in a display substrate according to an exemplary embodiment of the present disclosure;

[0043] FIG6 is an enlarged view of the cross-sectional structure of a light-concentrating layer in a display substrate according to an exemplary embodiment of the present disclosure;

[0044] FIG. 7 is a second schematic cross-sectional structural diagram of a light-collecting layer in a display substrate according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the embodiments can be implemented in a variety of different forms. A person of ordinary skill in the art can easily understand the fact that the methods and contents can be transformed into various forms without departing from the purpose and scope of the present disclosure. Therefore, the present disclosure should not be interpreted as being limited to the contents described in the following embodiments. In the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be arbitrarily combined with each other.

[0046] In the drawings, the sizes of various components, layer thicknesses, or regions may be exaggerated for clarity. Therefore, one embodiment of the present disclosure is not necessarily limited to these dimensions, and the shapes and sizes of the components in the drawings do not reflect true proportions. Furthermore, the drawings schematically illustrate idealized examples, and one embodiment of the present disclosure is not limited to the shapes or numerical values ​​shown in the drawings.

[0047] In this specification, ordinal numbers such as “first”, “second” and “third” are provided to avoid confusion among constituent elements, and are not intended to limit the number.

[0048] In this specification, for convenience, words and phrases indicating orientation or positional relationships, such as "middle," "upper," "lower," "front," "back," "vertical," "horizontal," "top," "bottom," "inside," and "outside," are used to illustrate the positional relationships of constituent elements with reference to the accompanying drawings. This is merely for the purpose of facilitating the description of this specification and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present disclosure. The positional relationships of constituent elements may be appropriately changed depending on the direction in which each constituent element is described. Therefore, the present disclosure is not limited to the words and phrases described in the specification and may be appropriately replaced according to the circumstances.

[0049] In this specification, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections, indirect connections through intermediaries, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this disclosure.

[0050] In this specification, a transistor refers to a device that includes at least three terminals: a gate electrode, a drain electrode, and a source electrode. A transistor has a channel region between a drain electrode (drain electrode terminal, drain region, or drain electrode) and a source electrode (source electrode terminal, source region, or source electrode), and current can flow through the drain electrode, the channel region, and the source electrode. Note that in this specification, the channel region refers to the region through which current primarily flows.

[0051] In this specification, the first electrode can be a drain electrode and the second electrode can be a source electrode, or vice versa. The functions of "source electrode" and "drain electrode" may be interchanged when using transistors with opposite polarity or when the direction of current changes during circuit operation. Therefore, in this specification, "source electrode" and "drain electrode" may be interchanged.

[0052] In this specification, "electrically connected" includes components connected together via an element having some electrical function. There are no particular limitations on the "element having some electrical function" as long as it enables the transfer of electrical signals between the connected components. Examples of "element having some electrical function" include not only electrodes and wiring, but also switching elements such as transistors, resistors, inductors, capacitors, and other components with various functions.

[0053] In this specification, "parallel" refers to a state where the angle formed by two straight lines is greater than -10° and less than 10°, and thus also includes a state where the angle is greater than -5° and less than 5°. Furthermore, "perpendicular" refers to a state where the angle formed by two straight lines is greater than 80° and less than 100°, and thus also includes a state where the angle is greater than 85° and less than 95°.

[0054] In this specification, the terms "film" and "layer" may be interchanged. For example, "conductive layer" may be replaced with "conductive film." Similarly, "insulating film" may be replaced with "insulating layer."

[0055] The term "about" in the present disclosure refers to a numerical value that is not strictly defined and allows for process and measurement errors.

[0056] Figure 1 is a schematic diagram of a planar structure of a display substrate. In an exemplary embodiment, the display substrate may include a display area and a frame area located around the display area. As shown in Figure 1, the display area of ​​the display substrate may include a plurality of pixel units P arranged in a matrix. At least one pixel unit P may include a first subpixel P1 emitting a first color light, a second subpixel P2 emitting a second color light, and a third subpixel P3 emitting a third color light. Each subpixel may include a circuit unit and a light-emitting unit. The circuit unit may include at least a pixel driving circuit. The pixel driving circuit is respectively connected to a scan signal line, a data signal line, and a light-emitting signal line. The pixel driving circuit is configured to receive a data voltage transmitted by the data signal line under the control of the scan signal line and the light-emitting signal line and output a corresponding current to the light-emitting device. The light-emitting unit may include at least a light-emitting device. The light-emitting device is respectively connected to the pixel driving circuit of the subpixel in which it is located. The light-emitting device is configured to emit light of a corresponding brightness in response to the current output by the pixel driving circuit of the subpixel in which it is located. Each subpixel includes an opening area that defines the light-emitting area of ​​the subpixel.

[0057] In an exemplary embodiment, the display panel includes a display area having a rectangular shape. In some embodiments, the display area may also have a circular shape, an elliptical shape, or a polygonal shape such as a triangle, a pentagon, or the like.

[0058] In an exemplary embodiment, the first subpixel P1 may be a red subpixel (R) that emits red light, the second subpixel P2 may be a blue subpixel (B) that emits blue light, and the third subpixel P3 may be a green subpixel (G) that emits green light. In an exemplary embodiment, the subpixels may be rectangular, diamond-shaped, pentagonal, or hexagonal, and the three subpixels may be arranged horizontally, vertically, or in a triangular pattern, although this disclosure is not limited thereto.

[0059] In an exemplary embodiment, a pixel unit may include four sub-pixels, and the four sub-pixels may be arranged in a horizontal parallel arrangement, a vertical parallel arrangement, or a square arrangement, etc., which is not limited in the present disclosure.

[0060] In an exemplary embodiment, the light emitting device may include one of an organic light emitting diode (OLED), a light emitting diode (LED), and a quantum dot light emitting diode (QLED). The sub-pixel may emit light, for example, red, green, blue, or white light, through the light emitting device.

[0061] In an exemplary embodiment, the display substrate is of a top emission type, a bottom emission type, a dual emission type, etc. In the top emission type, visible light emitted from the light-emitting device can be irradiated to an area in front of the display substrate to display an image; in the bottom emission type, visible light emitted from the light-emitting device can be irradiated to an area behind the display substrate to display an image.

[0062] In the following, the light-emitting device in the display panel of this embodiment is an organic light-emitting diode (OLED) as an example, but the display panel of this embodiment is not limited to this. In another embodiment, the light-emitting device in the display panel can be a micro light-emitting diode (LED) or a quantum dot light-emitting diode (QLED). For example, the light-emitting layer of the light-emitting device in the display panel can include organic materials, inorganic materials, quantum dots, organic materials and quantum dots, inorganic materials and quantum dots, or organic materials, inorganic materials and quantum dots.

[0063] Figure 2 is a schematic diagram of the cross-sectional structure of a display substrate, illustrating the structure of three sub-pixels in the display substrate. In an exemplary embodiment, the display substrate of the embodiment of the present disclosure may include more sub-pixels (see Figure 1). In addition, although Figure 2 shows that three sub-pixels are adjacent to each other, the embodiments of the present disclosure are not limited to this. That is to say, other components such as wiring may be between the three sub-pixels. The three sub-pixels may not be pixels adjacent to each other. In Figure 2, the cross-section of the three sub-pixels may not be a cross-section in the same direction of the display substrate.

[0064] In an exemplary embodiment, as shown in FIG2 , on a plane perpendicular to the display substrate, the display region of the display substrate may include a driving circuit layer 102 disposed on a substrate 101, a light-emitting structure layer 103 disposed on a side of the driving circuit layer 102 away from the substrate 101, and an encapsulation structure layer 104 disposed on a side of the light-emitting structure layer 103 away from the substrate 101. In some possible implementations, the display substrate may include other film layers, such as a touch structure layer, etc., which is not limited in this disclosure.

[0065] In an exemplary embodiment, the substrate 101 may be a flexible substrate or a rigid substrate. The driving circuit layer 102 may include a plurality of circuit units, each of which may include at least a pixel driving circuit, which may include a plurality of transistors and a storage capacitor. The light-emitting structure layer 103 may include a plurality of light-emitting units, each of which may include at least a light-emitting device, which may include an anode, an organic light-emitting layer, and a cathode. The anode is connected to the pixel driving circuit, the organic light-emitting layer is connected to the anode, and the cathode is connected to the organic light-emitting layer. The organic light-emitting layer emits light of a corresponding color when driven by the anode and cathode.

[0066] In exemplary embodiments, the organic light-emitting layer may include an emission layer (EML) and any one or more of the following: a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), a hole blocking layer (HBL), an electron transport layer (ETL), and an electron injection layer (EIL).

[0067] In some exemplary embodiments, the encapsulation structure layer 104 may include a stacked first encapsulation layer, a second encapsulation layer, and a third encapsulation layer. The first encapsulation layer and the third encapsulation layer may be made of inorganic materials, and the second encapsulation layer may be made of organic materials. The second encapsulation layer is arranged between the first encapsulation layer and the third encapsulation layer to form an inorganic material / organic material / inorganic material stacked structure, which can ensure that external water vapor cannot enter the light-emitting structure layer.

[0068] An exemplary embodiment of the present disclosure provides a display substrate, including:

[0069] substrate;

[0070] a light emitting device, disposed on one side of the substrate, the light emitting device being configured to emit light;

[0071] a color filter layer, disposed on a side of the light-emitting device away from the substrate, the color filter layer comprising at least two filter patterns; at least portions of adjacent filter patterns being stacked in a thickness direction of the substrate to form an overlapping portion;

[0072] a light-gathering layer, disposed on a side of the color filter layer away from the substrate, the light-gathering layer being configured to gather light emitted from the color filter layer;

[0073] The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion arranged in sequence along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses and different filter patterns overlap in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the substrate of the overlapping portion.

[0074] In some embodiments, the curvature radius R1 of the curved groove and the curvature radius R2 of the convex lens on the same side satisfy the following relationship: 4.5≤R2 / R1≤15.

[0075] In some embodiments, the minimum distance between the bottom end of the curved groove and the junction of the edge of the convex lens on the same side and the curved groove is smaller than the minimum distance between the orthographic projections of the two adjacent convex lenses on the substrate.

[0076] In some embodiments, a minimum distance L1 between the orthographic projections of two adjacent convex lenses on the substrate is less than or equal to 0.8 micrometers and greater than or equal to 0.2 micrometers.

[0077] In some embodiments, the orthographic projection of the gap between the two adjacent convex lenses on the substrate is located in the orthographic projection of the overlapping portion on the substrate.

[0078] The display substrate of the present disclosure is described below by way of some exemplary embodiments.

[0079] Figure 3 is a schematic cross-sectional view of a display substrate according to an exemplary embodiment of the present disclosure, illustrating three sub-pixels (a first sub-pixel, a second sub-pixel, and a third sub-pixel) in the display substrate. In an exemplary embodiment, as shown in Figure 3, the display substrate may include a substrate 101, a driving circuit layer 102 disposed on the substrate 101, a light-emitting structure layer 103 disposed on a side of the driving circuit layer 102 away from the substrate 101, an encapsulation structure layer 104 disposed on a side of the light-emitting structure layer 103 away from the substrate 101, a first planar layer 11 disposed on a side of the encapsulation structure layer 104 away from the substrate 101, a color filter layer 105 disposed on a side of the first planar layer 11 away from the substrate 101, a second planar layer 12 disposed on a side of the color filter layer 105 away from the substrate 101, and a light-gathering layer 106 disposed on a side of the second planar layer 12 away from the substrate 101. The light-gathering layer 106 can improve the light output efficiency and brightness of the sub-pixels, thereby reducing the power consumption of the display substrate.

[0080] In an exemplary embodiment, the driving circuit layer 102 may include at least a plurality of circuit units, the light-emitting structure layer may include at least a plurality of light-emitting units, at least one circuit unit may include a pixel driving circuit, at least one light-emitting unit may include a light-emitting device, the light-emitting device may include at least an anode, an organic light-emitting layer and a cathode, and the anode in the light-emitting unit is connected to the pixel driving circuit in the corresponding circuit unit. In an exemplary embodiment, the circuit unit referred to in this disclosure refers to an area divided according to the pixel driving circuit, and the light-emitting unit referred to in this disclosure refers to an area divided according to the light-emitting device. In an exemplary embodiment, the position of the orthographic projection of the light-emitting unit on the substrate may correspond to the position of the orthographic projection of the circuit unit on the substrate, or the position of the orthographic projection of the light-emitting unit on the substrate may not correspond to the position of the orthographic projection of the circuit unit on the substrate.

[0081] In an exemplary embodiment, as shown in FIG3 , the light-emitting unit includes a first light-emitting device 21, a second light-emitting device 22, and a third light-emitting device 23. The first light-emitting device 21, the second light-emitting device 22, and the third light-emitting device 23 are arranged in a direction opposite to the direction X. The first light-emitting device 21 can emit light of a first color, such as blue; the second light-emitting device 22 can emit light of a second color, such as green; and the third light-emitting device 23 can emit light of a third color, such as red. The X direction is a direction parallel to the plane of the substrate.

[0082] In an exemplary embodiment, as shown in Figure 3, the encapsulation structure layer 104 may include a stacked first encapsulation layer 1041, a second encapsulation layer 1042 and a third encapsulation layer 1043. The first encapsulation layer 1041 and the third encapsulation layer 1043 may be made of inorganic materials, and the second encapsulation layer 1042 may be made of organic materials. The second encapsulation layer 1042 is arranged between the first encapsulation layer 1041 and the third encapsulation layer 1043 to form an inorganic material / organic material / inorganic material stacked structure, which can ensure that external water vapor cannot enter the light-emitting structure layer 103.

[0083] In an exemplary embodiment, as shown in FIG3 , both the first and second planarizing layers 11 and 12 can be made of an organic material, such as a resin. The surfaces of the first and second planarizing layers 11 and 12 facing away from the substrate 101 are flat, meaning that the distance between the surfaces of the first and second planarizing layers 11 and 12 facing away from the substrate 101 and the surface of the substrate 101 is the same or similar. If the surface of the film layer located on the side of the encapsulation structure layer 104 facing away from the substrate 101 is uneven, the surface of the encapsulation structure layer 104 facing away from the substrate 101 is uneven. The first planarizing layer 11 covers the uneven surface of the encapsulation structure layer 104 facing away from the substrate 101, thereby reducing the step difference caused by the uneven surface of the encapsulation structure layer 104, thereby ensuring the uniformity of the display substrate. If the surface of the color filter layer 105 facing away from the substrate 101 is uneven, the second planarizing layer 12 covers the uneven surface of the color filter layer 105 facing away from the substrate 101, thereby reducing the step difference caused by the uneven surface of the color filter layer 105, thereby ensuring the uniformity of the display substrate.

[0084] In an exemplary embodiment, the second flat layer 12 is located between the color filter layer 105 and the light-gathering layer 106. The refractive index of the material of the second flat layer 12 is not greater than the refractive index of the material of the light-gathering layer 106. Therefore, light passing through the color filter layer 105 on the surface is totally reflected at the junction of the second flat layer 12 and the color filter layer 105, thereby ensuring the light output effect of the display substrate.

[0085] In an exemplary embodiment, as shown in FIG3 , the color filter layer 105 includes a first filter pattern 31, a second filter pattern 32, and a third filter pattern 33. The first filter pattern 31, the second filter pattern 32, and the third filter pattern 33 are arranged alternately along a direction opposite to the direction X. The first filter pattern 31 is configured to allow light of a first color, such as blue light, to be emitted. The first filter pattern 31 overlaps with the orthographic projection of the first light-emitting device 21 on the substrate. For example, the orthographic projection of the first light-emitting device 21 on the substrate is located within the orthographic projection of the first filter pattern 31 on the substrate. The second filter pattern 32 is configured to allow light of a second color, such as green light, to be emitted. The second filter pattern 32 overlaps with the orthographic projection of the second light-emitting device 22 on the substrate. For example, the orthographic projection of the second light-emitting device 22 on the substrate is located within the orthographic projection of the second filter pattern 32 on the substrate. The third filter pattern 33 is configured to allow light of a third color, such as red light, to be emitted. The third filter pattern 33 overlaps with the orthographic projection of the third light-emitting device 23 on the substrate. For example, the orthographic projection of the third light-emitting device 23 on the substrate is located in the orthographic projection of the third filter pattern 33 on the substrate.

[0086] In an exemplary embodiment, as shown in FIG3 , within the same light-emitting unit, the light-collecting layer 106 includes a first convex lens 41, a second convex lens 42, and a third convex lens 43. The first convex lens 41, the second convex lens 42, and the third convex lens 43 are arranged in a direction opposite to the direction X. The first convex lens 41 is configured to collect light emitted from the first filter pattern 31, refracting the large-angle light emitted from the first filter pattern 31 into small-angle light, thereby achieving a light-collecting effect. For example, if the light emitted from the first filter pattern 31 is blue light, the first convex lens 41 can collect the blue light emitted from the first filter pattern 31. The second convex lens 42 is configured to collect light emitted from the second filter pattern 32, refracting the large-angle light emitted from the second filter pattern 32 into small-angle light, thereby achieving a light-collecting effect. For example, if the light emitted from the second filter pattern 32 is green light, the second convex lens 42 can collect the green light emitted from the second filter pattern 32. The third convex lens 43 is configured to gather the light emitted from the third filter pattern 33, so that the large-angle light emitted from the third filter pattern 33 is refracted to form small-angle light, thereby achieving a focusing effect. For example, if the light emitted from the third filter pattern 33 is red light, the third convex lens 43 can gather the red light emitted from the third filter pattern 33.

[0087] In an exemplary embodiment, as shown in FIG3 , the first convex lens 41 overlaps with the orthographic projection of the first filter pattern 31 on the substrate. For example, the orthographic projection of the first convex lens 41 on the substrate is located within the orthographic projection of the first filter pattern 31 on the substrate. The second convex lens 42 overlaps with the orthographic projection of the filter pattern 32 on the substrate. For example, the orthographic projection of the second convex lens 42 on the substrate is located within the orthographic projection of the second filter pattern 32 on the substrate. The third convex lens 43 overlaps with the orthographic projection of the third filter pattern 33 on the substrate. For example, the orthographic projection of the third convex lens 43 on the substrate is located within the orthographic projection of the third filter pattern 33 on the substrate.

[0088] Figure 4 is a schematic cross-sectional view of a color filter layer and a light-gathering layer in a display substrate according to an exemplary embodiment of the present disclosure. In this exemplary embodiment, as shown in Figure 4 , at least portions of two adjacent filter patterns in the color filter layer are stacked along the thickness of the substrate, forming an overlapping portion. This overlapping portion can serve as a light-blocking pattern to prevent color cross-talk between adjacent sub-pixels.

[0089] In an exemplary embodiment, as shown in FIG4 , the first filter pattern 31 is adjacent to the second filter pattern 32, and the second filter pattern 32 is adjacent to the third filter pattern 33. The first filter pattern 31 may include a first filter portion 51 and a second filter portion 52, and the orthographic projections of the first filter portion 51 and the second filter portion 52 on the substrate do not overlap; the second filter pattern 32 may include a third filter portion 53, a fourth filter portion 54, and a fifth filter portion 55, and the orthographic projections of the third filter portion 53, the fourth filter portion 54, and the fifth filter portion 55 on the substrate do not overlap; and the third filter pattern 33 may include a sixth filter portion 56 and a seventh filter portion 57, and the orthographic projections of the sixth filter portion 56 and the seventh filter portion 57 on the substrate do not overlap. The first filter portion 51 of the first filter pattern 31 overlaps with the orthographic projection of the first convex lens 41 on the substrate, the fourth filter portion 54 of the second filter pattern 32 overlaps with the orthographic projection of the second convex lens 42 on the substrate, and the seventh filter portion 57 of the third filter pattern 33 overlaps with the orthographic projection of the third convex lens 43 on the substrate.

[0090] In an exemplary embodiment, as shown in FIG4 , the orthographic projections of the second filter portion 52 in the first filter pattern 31 and the third filter portion 53 in the second filter pattern 32 on the substrate overlap, the second filter portion 52 and the third filter portion 53 are stacked in a direction Z, and the second filter portion 52 is located on a side of the third filter portion 53 away from the substrate. The maximum distance from the surface of the second filter portion 52 away from the substrate to the surface of the substrate is greater than the maximum distance from the surface of the third filter portion 53 away from the substrate to the surface of the substrate. The second filter portion 52 and the third filter portion 53 form a first overlapping portion 34.

[0091] In an exemplary embodiment, as shown in FIG4 , the orthographic projections of the fifth filter portion 55 in the second filter pattern 32 and the sixth filter portion 56 in the third filter pattern 32 on the substrate overlap, the fifth filter portion 55 and the sixth filter portion 56 are stacked in the direction Z, and the fifth filter portion 55 is located on the side of the sixth filter portion 56 away from the substrate. The maximum distance from the surface of the fifth filter portion 55 away from the substrate to the surface of the substrate is greater than the maximum distance from the surface of the sixth filter portion 56 away from the substrate to the surface of the substrate. The fifth filter portion 55 and the sixth filter portion 56 form a second stacked portion 35.

[0092] In an exemplary embodiment, as shown in FIG4 , the second flat layer 12 between the light-gathering layer 106 and the color filter layer 105 can ensure the uniformity of the morphology of each sub-pixel in the display substrate, thereby solving the problem of the uneven surface of the color filter layer 105 away from the substrate due to the overlapping of adjacent filter patterns in the color filter layer 105, thereby achieving uniform display brightness of the display substrate.

[0093] In an exemplary embodiment, as shown in FIG4 , two adjacent convex lenses in the light-focusing layer are spaced apart, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projections of the overlapping portions of the two adjacent filter patterns on the substrate, thereby ensuring that light emitted from the filter patterns can be focused by the corresponding convex lenses.

[0094] In an exemplary embodiment, as shown in FIG4 , the first convex lens 41 is adjacent to the second convex lens 42, and the second convex lens 42 is adjacent to the third convex lens 43. The first convex lens 41 includes a first side surface 61, which is the side surface of the first convex lens 41 close to the second convex lens 42. The second convex lens 42 includes a second side surface 62 and a third side surface 63, where the second side surface 62 is the side surface of the second convex lens 42 close to the first convex lens 41, and the third side surface 63 is the side surface of the second convex lens 42 close to the third convex lens 43. The third convex lens 43 includes a fourth side surface 64, which is the side surface of the third convex lens 43 close to the second convex lens 42. The minimum distance L1 between the first side surface 61 of the first convex lens 41 and the second side surface 62 of the second convex lens 42 in the direction X is the minimum spacing between the orthographic projections of the first convex lens 41 and the second convex lens 42 on the substrate; the minimum distance L2 between the third side surface 63 of the second convex lens 42 and the fourth side surface 64 of the third convex lens 43 in the direction X is the minimum spacing between the orthographic projections of the second convex lens 42 and the third convex lens 43 on the substrate, wherein L1 is smaller than L2. Exemplarily, the ratio of the minimum distance L1 to the minimum distance L2 is 1:2 to 1:5. For example, the minimum distance L1 can be 0.1 micrometer to 1 micrometer, or the minimum distance L1 can be 0.2 micrometer to 0.8 micrometer; the minimum distance L2 can be 0.2 micrometer to 5 micrometers, or the minimum distance L2 can be 0.4 micrometer to 4 micrometers.

[0095] In an exemplary embodiment, as shown in FIG4 , the gap between the orthographic projections of the first convex lens 41 and the second convex lens 42 on the substrate is located in the orthographic projection of the first overlapping portion 34 on the substrate, and the minimum distance L1 between the first side surface 61 of the first convex lens 41 and the second side surface 62 of the second convex lens 42 in the direction X is less than the minimum distance of the first overlapping portion 34 in the direction X. The gap between the orthographic projections of the second convex lens 42 and the third convex lens 43 on the substrate is located in the orthographic projection of the second overlapping portion 35 on the substrate, and the minimum distance L2 between the third side surface 63 of the second convex lens 42 and the fourth side surface 64 of the third convex lens 43 in the direction X is less than the minimum distance of the second overlapping portion 35 in the direction X.

[0096] Figure 5 is a schematic diagram of the cross-sectional structure of a light-concentrating layer in a display substrate according to an exemplary embodiment of the present disclosure. In the exemplary embodiment, as shown in Figure 5, the second convex lens 42 includes a second circular base and a second arc surface disposed on the second circular base, and the third convex lens 43 includes a third circular base and a third arc surface disposed on the third circular base. The maximum thickness h2 of the second convex lens 42 is less than or equal to the radius of the second circular base of the second convex lens 42. For example, if the second convex lens 42 is hemispherical, the maximum thickness h2 of the second convex lens 42 is equal to the radius of the second circular base of the second convex lens 42, and the tangent line where the second arc surface connects to the second circular base is perpendicular to the second circular base of the second convex lens 42. The maximum thickness h3 of the third convex lens 43 is less than or equal to the radius of the third circular base of the third convex lens 43. For example, if the third convex lens 43 is hemispherical, the maximum thickness h3 of the third convex lens 43 is equal to the radius of the third circular base of the third convex lens 43, and the tangent line where the third arc surface connects to the third circular base is perpendicular to the third circular base of the third convex lens 42.

[0097] In an exemplary embodiment, the second convex lens 42 and the third convex lens 43 are both hemispherical, which can ensure that the light emitted by the corresponding filter pattern is concentrated by the second convex lens 42 and the third convex lens 43 to achieve higher display brightness.

[0098] In an exemplary embodiment, as shown in FIG5 , the first convex lens 41 includes a first lens portion 411 and a second lens portion 412 stacked in sequence along a direction away from the substrate. The second lens portion 412 is hemispherical and includes a first circular bottom surface 4121 and a hemispherical surface disposed on the first circular bottom surface 4121. The first circular bottom surface 4121 of the second lens portion 412 may be the surface of the first lens portion 411 away from the substrate, and the tangent line where the hemispherical surface connects to the first circular bottom surface 4121 is perpendicular to the first circular bottom surface 4121.

[0099] In an exemplary embodiment, the maximum thickness of the first convex lens 41 is greater than or equal to the maximum dimension of the bottom surface of the first convex lens 41 close to the substrate. Exemplarily, the maximum thickness of the first convex lens 41 is 2.1 to 2.5 times the radius of the bottom surface of the first convex lens 41 close to the substrate.

[0100] In an exemplary embodiment, as shown in FIG5 , the first lens portion 411 is located on the side of the second lens portion 412 that is closer to the substrate. The first lens portion 411 includes a first surface 4111, a second surface 4112, and a side surface 4113 that connects the first and second surfaces 4111 and 4112. The first surface 4111 is the surface of the first lens portion 411 that is closer to the substrate and contacts the surface of the second flat layer 12. The second surface 4112 is the surface of the first lens portion 411 that is farther from the substrate and forms the first circular bottom surface 4121 of the second lens portion 412. The side surface 4113 is arc-shaped, and the angle b formed between the tangent line of the end of the side surface 4113 that is closer to the second flat layer 12 and the plane of the substrate is less than 90 degrees and greater than or equal to 30 degrees.

[0101] In an exemplary embodiment, in a direction perpendicular to the substrate, a maximum thickness of the second lens portion 412 is greater than a maximum thickness of the first lens portion 411 .

[0102] In an exemplary embodiment, the minimum distance between the orthographic projections of two adjacent convex lenses on the substrate is greater than or equal to the maximum thickness of the first lens portion 411, thereby avoiding the first lens portion being too thick, which leads to a reduction in the focusing effect, while improving the process effect and structural stability of the lens.

[0103] For example, the distance between the first surface 4111 of the first lens portion 411 and the second surface 4112 of the first lens portion 411 is 300 nanometers to 600 nanometers.

[0104] Since the process of preparing the convex lens requires exposure, heat melting and other processes, the process is difficult to control. If there is a slight fluctuation in the process, such as fluctuation in exposure focus, the circular bottom surface of the convex lens may move downward, resulting in the inability to form a hemispherical convex lens. That is, the radius of the circular bottom surface of the convex lens is greater than the maximum thickness of the convex lens, resulting in a portion of the light emitted from the corresponding filter pattern not passing through the convex lens, reducing the light gain effect of the convex lens.

[0105] The disclosed embodiment displays a substrate in which the first convex lens 41 includes a first lens portion 411 and a second lens portion 412. The first lens portion 411 is hemispherical. During the preparation of the first convex lens 41, the circular bottom surface of the first lens portion 411 is raised to a certain height, that is, the first lens portion 411 is arranged on the second lens portion 412. This solves the problem of being unable to form a hemispherical morphology of at least part of the first convex lens 41 due to fluctuations in the preparation process, thereby ensuring the light efficiency gain effect of the first convex lens 41 and achieving higher display brightness. At the same time, the gap between the two adjacent convex lenses includes a curved groove on the side close to the convex lens. The curved groove can better focus light toward the central area of ​​the convex lens, eliminate stray light, and improve lens gain. For example, the first convex lens 41 can increase the brightness of the sub-pixel in which it is located by 1.2 to 1.8 times.

[0106] In an exemplary embodiment, the first lens portion 411 and the second lens portion 412 may be an integral structure, and the first lens portion 411 and the second lens portion 412 may be made of the same material and produced by the same production process. In some embodiments, the first lens portion and the second lens portion may be connected together using the same or different materials.

[0107] Figure 6 is an enlarged view of the cross-sectional structure of a light-collecting layer in a display substrate according to an exemplary embodiment of the present disclosure. Figure 6 may be a directional diagram at point a in Figure 5. In the exemplary embodiment, as shown in Figures 5 and 6, a first gap 71 is provided between the first convex lens 41 and the second convex lens 42. The first gap 71 includes a curved groove 82 on the side adjacent to the first convex lens 41. The curved groove 82 is recessed inwardly of the first convex lens 41. The curved groove 82 maximizes the collection of refracted bottom light and focuses the light toward the center of the convex lens through the curved groove 82, eliminating stray light and improving lens gain.

[0108] In an exemplary embodiment, as shown in FIG6 , the curvature radius R1 of the curved groove 82 and the curvature radius R2 of the first convex lens 41 on the same side satisfy the following relationship: 4.5≤R2 / R1≤15. This allows the curved groove 82 to focus light toward the center of the convex lens, improving lens gain.

[0109] In an exemplary embodiment, as shown in Figures 4 and 6 , the curved groove 82 includes a bottom end 821, which is the end of the curved groove 82 closest to the substrate. In the thickness direction of the substrate, the bottom end 821 of the curved groove 82 has a maximum spacing L3 from the edge of the first convex lens 41 on the same side closest to the substrate. The orthographic projections of the first convex lens 41 and the second convex lens 42 on the substrate have a minimum spacing L1. The maximum spacing L3 is smaller than the minimum spacing L1, thereby maximizing light collection at the bottom of the convex lens and improving lens gain.

[0110] In an exemplary embodiment, the first gap 71 between the first convex lens 41 and the second convex lens 42 is located in the orthographic projection of the first overlapping portion 34 on the substrate, thereby ensuring that the light emitted by the first filter pattern 31 and the second filter pattern 32 passes through the focusing of the first convex lens 41 and the second convex lens 42 respectively, and preventing the light emitted by the first filter pattern 31 and the second convex lens 32 from being emitted outside the first convex lens 41 and the second convex lens 42.

[0111] In an exemplary embodiment, a second gap 72 is included between the second convex lens 42 and the third convex lens 43. The orthographic projection of the second gap 72 between the second convex lens 42 and the third convex lens 43 on the substrate is located in the orthographic projection of the second overlapping portion 35 on the substrate, thereby ensuring that the light emitted by the second filter pattern 32 and the third filter pattern 33 passes through the focusing of the second convex lens 42 and the third convex lens 43 respectively, and preventing the light emitted by the second convex lens 42 and the third convex lens 43 from being emitted outside the second convex lens 42 and the third convex lens 43.

[0112] In an exemplary embodiment, as shown in FIG5 , the maximum thickness of the first convex lens 41 is the sum of the maximum thickness h4 of the first lens portion 411 and the maximum thickness h1 of the second lens portion 412. The maximum thickness of the first convex lens 41 is greater than the maximum thickness h2 of the second convex lens 42, and the maximum thickness of the first convex lens 41 is greater than the maximum thickness h3 of the third convex lens 43. For example, the difference between the maximum thickness h2 of the first convex lens 41 and the maximum thickness h2 of the second convex lens 42 is 0.4 μm to 0.6 μm, and the difference between the maximum thickness h3 of the first convex lens 41 and the maximum thickness h3 of the third convex lens 43 is 0.4 μm to 0.8 μm.

[0113] The display substrate of the disclosed embodiment can increase the maximum thickness of the first convex lens 41 to improve the light output intensity of the sub-pixel where the first convex lens 41 is located. For example, the light output intensity of the sub-pixel where the first convex lens 41 is located is increased by 1.2 to 1.8 times. As a result, the light output intensity of the first convex lens 41 is the same as or similar to the light output intensity of the second convex lens 42 and the third convex lens 43. This solves the problem of uneven light output from the display substrate caused by the light output intensity of the first sub-pixel (the sub-pixel where the first convex lens 41 is located) being low relative to the light output intensity of the second sub-pixel (the sub-pixel where the second convex lens 42 is located) and the third sub-pixel (the sub-pixel where the third convex lens 43 is located). The first convex lens 41 can compensate for the light output intensity of the first sub-pixel.

[0114] For example, the first sub-pixel emits blue light, the second sub-pixel emits green light, and the third sub-pixel emits red light. The light intensity of the blue light emitted by the first filter pattern 51 is lower than the light intensity of the green light emitted by the second filter pattern 52 and the light intensity of the red light emitted by the third filter pattern 53. The light intensity of the green light emitted by the second filter pattern 52 and the light intensity of the red light emitted by the third filter pattern 53 are approximately equal. The maximum thickness h2 of the second convex lens 42 is approximately equal to the maximum thickness h3 of the third convex lens 43. The maximum thickness of the first convex lens 41 is greater than the maximum thickness h2 of the second convex lens 42, and the difference between the maximum thickness h2 of the first convex lens 41 and the maximum thickness h2 of the second convex lens 42 is 0.4 microns. The maximum thickness of the first convex lens 41 is greater than the maximum thickness h3 of the third convex lens 43, and the difference between the maximum thickness h3 of the first convex lens 41 and the maximum thickness h3 of the third convex lens 43 is 0.4 microns. The blue light emitted by the first filter pattern 51 is focused by the first convex lens 41, so that the light intensity of the blue light emitted by the first sub-pixel is increased by 1.2 times, thereby making the light intensity of the blue light emitted by the first sub-pixel, the light intensity of the green light emitted by the second sub-pixel, and the light intensity of the red light emitted by the third sub-pixel roughly equal.

[0115] In an exemplary embodiment, the area of ​​the orthographic projection of the opening region of the first sub-pixel on the substrate is larger than the area of ​​the orthographic projection of the opening region of the second sub-pixel on the substrate, and the area of ​​the orthographic projection of the opening region of the first sub-pixel on the substrate is larger than the area of ​​the orthographic projection of the opening region of the third sub-pixel on the substrate. The area of ​​the orthographic projection of the first convex lens 41 corresponding to the first sub-pixel on the substrate is larger than the area of ​​the orthographic projection of the second convex lens 42 corresponding to the second sub-pixel on the substrate, and the area of ​​the orthographic projection of the first convex lens 41 corresponding to the first sub-pixel on the substrate is larger than the area of ​​the orthographic projection of the third convex lens 43 corresponding to the third sub-pixel on the substrate. For example, the difference between the area of ​​the orthographic projection of the first convex lens 41 of the first sub-pixel on the substrate and the area of ​​the orthographic projection of the second convex lens 42 of the second sub-pixel on the substrate is 5 μm. 2 to 15um 2 The difference between the area of ​​the orthographic projection of the first convex lens 41 of the first sub-pixel on the substrate and the area of ​​the orthographic projection of the third convex lens 43 of the third sub-pixel on the substrate is 5 μm. 2 to 25um 2 .

[0116] The embodiment of the present disclosure shows that the substrate can increase the area of ​​the orthographic projection of the first convex lens 41 on the substrate so that the light output intensity of the first convex lens 41 is the same as or similar to the light output intensity of the second convex lens 42 and the third convex lens 43, thereby enabling the first convex lens 41 to compensate for the light output intensity of the first sub-pixel.

[0117] In some embodiments, at least one of the second convex lens and the third convex lens can have a structure roughly the same as that of the first convex lens, that is, at least one of the second convex lens and the third convex lens includes a third lens portion and a fourth lens portion stacked in sequence along a direction away from the substrate, the fourth lens portion is hemispherical and has a structure roughly the same as that of the first lens portion of the first convex lens, and the third lens portion has a structure roughly the same as that of the second lens portion of the first convex lens.

[0118] FIG7 is a second schematic diagram of the cross-sectional structure of a light-gathering layer in a display substrate according to an exemplary embodiment of the present disclosure. In an exemplary embodiment, as shown in FIG7 , the light-gathering layer of the display substrate according to the exemplary embodiment of the present disclosure is substantially the same as the light-gathering layer of the display substrate shown in FIG5 , with the difference being that the structures of the second convex lens 42 and the third convex lens 43 are substantially the same as the structure of the first convex lens 41 . Specifically, the second convex lens 42 includes a third lens portion 421 and a fourth lens portion 422 stacked in a direction away from the substrate, with the fourth lens portion 422 being hemispherical. The third convex lens 43 includes a fifth lens portion 431 and a sixth lens portion 432 stacked in a direction away from the substrate, with the sixth lens portion 432 being hemispherical.

[0119] In an exemplary embodiment, as shown in FIG7 , within a single light-emitting unit, the gaps between adjacent lenses each include a curved groove that is recessed toward one side of the lens. For example, the first gap 71 includes a curved groove 82 on the side near the first lens 41 and the second convex lens 42 . The second gap 72 also includes a curved groove 82 on the side near the second convex lens 42 and on the side near the third convex lens 43 .

[0120] The exemplary embodiment of the present disclosure can collect the refracted bottom light to the maximum extent through the curved groove 82, and focus the light toward the central area of ​​the convex lens through the curved groove 82, thereby eliminating stray light and improving the lens gain.

[0121] The present disclosure also provides a method for preparing a display substrate, comprising:

[0122] forming a light emitting device on a substrate;

[0123] forming a color filter layer on the light-emitting device, wherein the color filter layer includes at least two filter patterns; at least portions of adjacent filter patterns are stacked in a thickness direction of the substrate to form an overlapping portion;

[0124] forming a light-collecting layer on the color filter layer, wherein the light-collecting layer is configured to collect light emitted from the color filter layer;

[0125] The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion arranged in sequence along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses and different filter patterns overlap in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the substrate of the overlapping portion.

[0126] The present disclosure also provides a display device including the display substrate of the aforementioned exemplary embodiment. The display device can be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system.

[0127] In some embodiments, the display device disclosed herein may be a VR or AR display device.

[0128] The drawings in this disclosure only relate to the structures involved in this disclosure, and other structures may refer to general designs. In the absence of conflict, the embodiments of this disclosure, that is, the features in the embodiments, may be combined with each other to obtain new embodiments.

[0129] It should be understood by those skilled in the art that the technical solutions of the present disclosure may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present disclosure, and all should be included in the scope of the claims of the present disclosure.

Claims

1. A display substrate, comprising: substrate; A light emitting device is disposed on one side of the substrate, and the light emitting device is configured to emit light; A color filter layer is arranged on a side of the light emitting device away from the substrate, the color filter layer comprising at least two filter patterns; at least parts of adjacent filter patterns are stacked in a thickness direction of the substrate to form an overlapping portion; A light-gathering layer, disposed on a side of the color filter layer away from the substrate, the light-gathering layer being configured to gather light emitted from the color filter layer; The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion sequentially arranged along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses overlap with different filtering patterns in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the overlapping portion on the substrate.

2. The display substrate according to claim 1, wherein: The curvature radius R1 of the curved groove and the curvature radius R2 of the convex lens on the same side satisfy the following relationship: 4.5≤R2 / R1≤15.

3. The display substrate according to claim 1, wherein: In the thickness direction of the substrate, the minimum distance between the bottom end of the curved groove and the edge of the convex lens on the same side is smaller than the minimum distance between the orthographic projections of the two adjacent convex lenses on the substrate.

4. The display substrate according to claim 1, wherein: A minimum distance L1 between the orthographic projections of two adjacent convex lenses on the substrate is less than or equal to 0.8 micrometers and greater than or equal to 0.2 micrometers.

5. The display substrate according to claim 1, wherein: The orthographic projection of the gap between the two adjacent convex lenses on the substrate is located in the orthographic projection of the overlapping portion on the substrate.

6. The display substrate according to claim 1, wherein: The two adjacent convex lenses include a first convex lens and a second convex lens, the first convex lens includes a first lens portion and a second lens portion arranged in sequence along a direction away from the base, the second lens portion is hemispherical, the second convex lens includes a circular bottom surface, and the maximum thickness of the second convex lens is less than or equal to the radius of the circular bottom surface.

7. The display substrate according to claim 6, wherein: The maximum thickness of the first convex lens is greater than the maximum thickness of the second convex lens.

8. The display substrate according to claim 7, wherein: The difference between the maximum thickness of the first convex lens and the maximum thickness of the second convex lens is 0.4 micrometers to 0.6 micrometers.

9. The display substrate according to claim 6, wherein: The maximum thickness of the first convex lens is 2.1 to 2.5 times the radius of the bottom surface of the first convex lens close to the substrate.

10. The display substrate according to claim 1, wherein: The two adjacent convex lenses include a first convex lens and a second convex lens, the first convex lens includes the first lens portion and the second lens portion, the second convex lens includes a third lens portion and a fourth lens portion sequentially arranged in a direction away from the base, and the fourth lens portion is hemispherical.

11. The display substrate according to any one of claims 1 to 10, wherein: The orthographic projection areas of the two adjacent convex lenses on the substrate are different.

12. The display substrate according to any one of claims 1 to 10, wherein: The color filter layer includes a first filter pattern, a second filter pattern and a third filter pattern, the first filter pattern is adjacent to the second filter pattern, at least part of the first filter pattern and at least part of the second filter pattern are stacked in the thickness direction of the substrate to form a first overlapping portion, in which the first filter pattern is located on a side of the second filter pattern away from the substrate; the second filter pattern is adjacent to the third filter pattern, at least part of the second filter pattern and at least part of the third filter pattern are stacked in the thickness direction of the substrate to form a second overlapping portion, in which the second filter pattern is located on a side of the third filter pattern away from the substrate.

13. The display substrate according to any one of claims 1 to 10, wherein: The first lens portion and the second lens portion are an integrated structure.

14. The display substrate according to any one of claims 1 to 10, wherein: The first lens portion includes a first surface close to the substrate, a second surface away from the substrate, and a side surface connecting the first surface and the second surface. The second surface is a surface of the second lens portion close to the substrate, and the side surface is arc-shaped.

15. The display substrate according to claim 14, wherein: An angle between a tangent line at an intersection of the side surface and the first surface and a plane parallel to the base is less than 90 degrees and greater than or equal to 30 degrees.

16. The display substrate according to claim 14, wherein: A distance between the first surface of the first lens portion and the second surface of the first lens portion is 300 nanometers to 600 nanometers. 17 . The display substrate according to claim 1 , further comprising a planar layer, wherein the planar layer is located between the color filter layer and the light-gathering layer, and the refractive index of the planar layer material is not greater than the refractive index of the light-gathering layer material.

18. The display substrate according to any one of claims 1 to 10, wherein: In a direction perpendicular to the substrate, a maximum thickness of the second lens portion is greater than a maximum thickness of the first lens portion.

19. The display substrate according to any one of claims 1 to 10, wherein: The minimum distance between the orthographic projections of the two adjacent convex lenses on the substrate is greater than or equal to the maximum thickness of the first lens portion.

20. A display device, comprising the display substrate according to any one of claims 1 to 19.

21. A method for preparing a display substrate, comprising: forming a light emitting device on a substrate; forming a color filter layer on the light-emitting device, wherein the color filter layer comprises at least two filter patterns; At least parts of adjacent filter patterns are stacked in a thickness direction of the substrate to form overlapping portions; forming a light-gathering layer on the color filter layer, wherein the light-gathering layer is configured to gather light emitted from the color filter layer; The focusing layer includes at least two adjacent convex lenses, at least one of the two adjacent convex lenses includes a first lens portion and a second lens portion sequentially arranged along a direction away from the substrate, the second lens portion is hemispherical, and the two adjacent convex lenses overlap with different filtering patterns in the orthographic projection of the substrate; a gap is included between the two adjacent convex lenses, at least one of the gaps includes a curved groove on a side close to the convex lens, and the gap between the orthographic projections of the two adjacent convex lenses on the substrate is located in the orthographic projection of the overlapping portion on the substrate.

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