Display substrate, manufacturing method and display apparatus

Abstract

A display substrate, a manufacturing method and a display apparatus. The display substrate comprises a glass substrate (10), and a composite layer (15) and a planarization layer (23) which are arranged in a direction facing away from the glass substrate (10). The end surface of the glass substrate (10) close to the composite layer (15) comprises a first lens region (10c), and the end surface of the composite layer (15) and / or the planarization layer (23) away from the glass substrate (10) comprises a second lens region (23a). An orthographic projection of the second lens region (23a) on the glass substrate (10) at least partially overlaps with an orthographic projection of the first lens region (10c) on the glass substrate (10). The display substrate is provided with two layers of micro-lens arrays, such that more light rays can be emitted out of the display substrate, thereby improving the brightness of the display substrate, improving the light-emitting efficiency, and reducing power consumption when the preset illumination intensity is reached.

Description

Display substrate, manufacturing method and display device Technical Field

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

[0002] Organic Light Emitting Diodes (OLEDs) and Quantum-dot Light Emitting Diodes (QLEDs) are active light-emitting display devices with advantages such as self-luminescence, wide viewing angles, high contrast, low power consumption, extremely fast response times, thinness, flexibility, and low cost. Currently, the luminous efficiency of display substrates is relatively low.

[0003] Summary of the Invention

[0004] 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.

[0005] An embodiment of the present disclosure provides a display substrate, comprising a glass substrate, and a composite layer and a flat layer arranged in a direction away from the glass substrate;

[0006] The glass substrate includes a first lens area on an end surface close to the composite layer, and the composite layer and / or the flat layer includes a second lens area on an end surface away from the glass substrate;

[0007] An orthographic projection of the second lens area on the glass substrate at least partially overlaps with an orthographic projection of the first lens area on the glass substrate.

[0008] In some exemplary embodiments, a plurality of first micro lenses are provided in the first lens area, and the first micro lenses are arranged as first arc-shaped surfaces that are concave toward a side of the glass substrate away from the composite layer;

[0009] A plurality of second micro lenses are disposed in the second lens area, and the second micro lenses are configured as second arc-shaped surfaces that are concave toward the glass substrate.

[0010] In some exemplary embodiments, at least one of the first microlens and the second microlens has the same structure and size.

[0011] In some exemplary embodiments, the composite layer is made of an inorganic-organic hybrid resin, and the refractive index of the inorganic-organic hybrid resin is 1.5 to 1.9.

[0012] In some exemplary embodiments, a diameter of a cross section of the first curved surface in a direction parallel to the glass substrate is set to be 1 micron to 50 microns;

[0013] The maximum dimension of the first curved surface in a direction perpendicular to the glass substrate is set to be 0.5 micrometers to 25 micrometers.

[0014] In some exemplary embodiments, a filter layer is further included, wherein the filter layer is configured to cover the end surface of the flat layer close to the glass substrate, and the refractive index of the flat layer is configured to be greater than the refractive index of the filter layer;

[0015] The refractive index of the composite layer is set to be greater than the refractive index of the glass substrate.

[0016] In some exemplary embodiments, the invention further comprises a first electrode layer, a pixel definition layer, a light emitting layer, and a second electrode layer;

[0017] The first electrode layer, the light-emitting layer and the second electrode layer are sequentially stacked in a direction away from the glass substrate, the first electrode layer is located on a side of the flat layer away from the glass substrate, and the first electrode layer is configured as a light-transmitting electrode;

[0018] The pixel definition layer encloses a plurality of pixel openings, and the light-emitting layer is located in the pixel definition layer within the pixel openings;

[0019] The second electrode layer is configured to reflect light passing through the pixel definition layer toward the glass substrate.

[0020] In some exemplary embodiments, an orthographic projection of the pixel definition layer on the glass substrate at least overlaps with an orthographic projection of the first lens area or / and the second lens area on the glass substrate.

[0021] In some exemplary embodiments, the second electrode layer is configured to form a first groove with a plurality of notches facing the glass substrate;

[0022] The pixel definition layer includes a plurality of pixel defining units arranged at intervals in a direction parallel to the glass substrate, and the plurality of pixel defining units each surround the pixel opening;

[0023] The light-emitting layer includes a plurality of light-emitting components. The light-emitting components are arranged in a one-to-one correspondence with the pixel defining units and are all located in the first groove.

[0024] In some exemplary embodiments, the planar layer includes a plurality of planar units, which are arranged to correspond one-to-one with the plurality of pixel defining units and are located in the first groove, and the plurality of planar units are each provided with the second lens area on a side away from the glass substrate.

[0025] In some exemplary embodiments, the optical filter layer is further included, and the optical filter layer is located on a side of the flat layer close to the glass substrate;

[0026] The filter layer includes a plurality of filters spaced apart in a direction parallel to the glass substrate. The filters are arranged to correspond to the pixel defining units one by one and are located in the first groove.

[0027] In some exemplary embodiments, a plurality of first lens areas are provided, and the filters are arranged in a one-to-one correspondence with the first lens areas. The orthographic projection of the first lens area on the glass substrate is located within the orthographic projection of the filter on the glass substrate.

[0028] In some exemplary embodiments, a driving circuit layer is further included, wherein the driving circuit layer is located between the glass substrate and the first electrode layer;

[0029] The second electrode layer includes groove portions and covering portions alternately arranged in a direction parallel to the glass substrate. The groove portions are configured as grooves and surround the first groove. The covering portions cover the surface of the driving circuit layer away from the glass substrate.

[0030] In some exemplary embodiments, the groove portion includes a groove sidewall and a groove bottom wall, the groove sidewall is arranged to form a ring in a direction parallel to the glass substrate, and the groove bottom wall is arranged to close an end of the groove sidewall away from the glass substrate;

[0031] The circumferential surface of the pixel defining unit in a direction parallel to the glass substrate is set as a first end surface;

[0032] The circumferential surface of the flat unit in a direction parallel to the glass substrate is set as a second end surface;

[0033] The circumferential surface of the filter in a direction parallel to the glass substrate is set as a third end surface;

[0034] The first end surface, the second end surface and the third end surface are arranged in sequence in a direction perpendicular to the glass substrate;

[0035] The groove sidewall is configured to cover the first end surface, the second end surface and the third end surface;

[0036] The groove bottom wall is configured to cover the pixel defining unit and the end surface of the light emitting component away from the glass substrate.

[0037] In some exemplary embodiments, the device further includes a driving circuit component and a light shielding layer, wherein the driving circuit component is located between the planar layer and the composite layer;

[0038] The first electrode layer includes a plurality of first electrode units, and the first electrode units are arranged in the first groove;

[0039] The driving circuit assembly includes a connecting electrode, and the first electrode unit is connected to the connecting electrode through a via hole;

[0040] The light shielding layer is configured as a high-reflectivity metal film. The light shielding layer is located on the first electrode layer and / or the connecting electrode and is configured corresponding to the via hole to shield the light directly irradiated from the via hole to the glass substrate.

[0041] In some exemplary embodiments, the light shielding layer is configured to cover the end surface of the connecting electrode facing the via hole, and the orthographic projection of the light shielding layer on the glass substrate is configured to at least partially overlap with the orthographic projection of the via hole on the glass substrate.

[0042] In some exemplary embodiments, the first electrode unit includes a via-hole connecting portion located in the via-hole, and the light shielding layer is configured to cover an end surface of the via-hole connecting portion away from the glass substrate.

[0043] In some exemplary embodiments, the via hole is configured to penetrate the planar layer and the filter layer, the first electrode unit is configured to cover at least a portion of a hole wall of the via hole, and the pixel definition layer extends into the via hole.

[0044] The present disclosure provides a preparation method for the above-mentioned display substrate, comprising:

[0045] forming a plurality of first microlenses on the glass substrate, wherein the plurality of first microlenses are provided in the first lens area, and the first microlenses are arranged as first arc-shaped surfaces that are concave toward the end surface of the glass substrate away from the composite layer;

[0046] A plurality of second microlenses are formed on the composite layer and / or the flat layer. A plurality of second microlenses are provided in the second lens area. The second microlenses are arranged as second arc-shaped surfaces concave toward the glass substrate.

[0047] An embodiment of the present disclosure provides a display device including the above-mentioned display substrate.

[0048] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description.

[0049] Summary of the Figures

[0050] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation to the technical solution of the present disclosure.

[0051] FIG1 is a schematic structural diagram of a display device;

[0052] FIG2 is a schematic diagram of a planar structure of a display substrate;

[0053] FIG3 is a schematic diagram of a cross-sectional structure of a display substrate;

[0054] FIG4 is a schematic diagram of a display substrate according to this exemplary embodiment;

[0055] FIG5 is a schematic cross-sectional view taken along line AA in FIG4 ;

[0056] FIG6 is a schematic cross-sectional view taken along line BB in FIG4 ;

[0057] FIG7 is a schematic diagram of the glass substrate in FIG5 ;

[0058] FIG8 is a partial enlarged schematic diagram of point D in FIG7;

[0059] FIG9 is a partial enlarged schematic diagram of point C in FIG5 ;

[0060] FIG10 is a partial schematic diagram of the display substrate in FIG6 ;

[0061] FIG11 is a schematic cross-sectional view of another display substrate according to this exemplary embodiment;

[0062] FIG12 is a schematic cross-sectional view of another display substrate of this exemplary embodiment;

[0063] FIG13 is a schematic cross-sectional view of another display substrate according to this exemplary embodiment;

[0064] FIG14 is a schematic cross-sectional view of another display substrate of this exemplary embodiment;

[0065] FIG15 is a schematic diagram of a first preparation method of the display substrate in FIG5 ;

[0066] FIG16 is a schematic diagram of a second preparation method for the display substrate in FIG5 ;

[0067] FIG17 is a third schematic diagram of preparing the display substrate in FIG5 ;

[0068] FIG18 is a fourth schematic diagram of manufacturing the display substrate in FIG5 ;

[0069] FIG19 is a fifth schematic diagram of manufacturing the display substrate in FIG5 ;

[0070] FIG20 is a partial enlarged schematic diagram of point E in FIG19;

[0071] FIG21 is a sixth schematic diagram of preparing the display substrate in FIG5 ;

[0072] FIG22 is a seventh schematic diagram of preparing the display substrate in FIG5 ;

[0073] FIG23 is an eighth schematic diagram of preparing the display substrate in FIG5 ;

[0074] FIG. 24 is a ninth schematic diagram of manufacturing the display substrate in FIG. 5 .

[0075] Description of the accompanying drawings:

[0076] 10-glass substrate; 11-shielding layer; 12-first metal layer;

[0077] 13-first microlens; 14-first arc-shaped surface; 15-composite layer;

[0078] 16-first buffer layer; 17-interlayer insulating layer; 18-driving circuit component;

[0079] 19-connecting electrodes; 20-driving circuit layer; 21-filter layer;

[0080] 22-first through hole; 23-planar layer; 24-second through hole;

[0081] 25-third through hole; 26-second microlens; 27-second curved surface;

[0082] 28- filter layer pattern; 29- flat layer pattern; 30- light emitting structure layer;

[0083] 31- filter; 32- via hole; 33- first electrode pattern;

[0084] 34-first electrode layer; 35-pixel definition layer pattern; 36-pixel definition layer;

[0085] 37-pixel opening; 38-light-emitting layer; 39-light-emitting member;

[0086] 40-encapsulation structure layer; 41-first component; 42-second electrode layer;

[0087] 43-packaging film; 44-cover plate; 45-flat unit;

[0088] 46-pixel defining unit; 47-first electrode unit; 48-first groove;

[0089] 49-groove portion; 50-covering portion; 51-first end surface;

[0090] 52-second end surface; 53-third end surface; 54-light shielding layer;

[0091] 55-via connecting portion; 56-first light shielding portion; 57-second light shielding portion;

[0092] 58- fourth end face; 59- groove side wall; 60- groove bottom wall.

[0093] Details

[0094] 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.

[0095] The scales in the figures in this disclosure are intended to serve as a reference for actual processes, but are not intended to be limiting. For example, the channel width-to-length ratio, the thickness and spacing of the various film layers, and the width and spacing of the various signal lines can be adjusted based on actual needs. The number of pixels in the display substrate and the number of sub-pixels within each pixel are not limited to the numbers shown in the figures. The figures described in this disclosure are merely schematic diagrams of the structures, and one embodiment of this disclosure is not limited to the shapes or values ​​shown in the figures.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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" can be interchanged, and "source terminal" and "drain terminal" can be interchanged.

[0101] 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.

[0102] 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°.

[0103] 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."

[0104] The triangles, rectangles, trapezoids, pentagons or hexagons in this specification are not in the strict sense, but may be approximate triangles, rectangles, trapezoids, pentagons or hexagons, etc. There may be some small deformations caused by tolerances, and there may be chamfers, arc edges and deformations.

[0105] The term "about" in the embodiments of the present disclosure does not strictly define the limits and allows for numerical values ​​within the range of process and measurement errors.

[0106] Figure 1 is a schematic diagram of the structure of a display device. As shown in Figure 1, the display device may include a timing controller, a data driver, a scan driver, a light-emitting driver, and a pixel array. The timing controller is connected to the data driver, the scan driver, and the light-emitting driver, respectively. The data driver is connected to a plurality of data signal lines (D1 to Dn), the scan driver is connected to a plurality of scan signal lines (S1 to Sm), and the light-emitting driver is connected to a plurality of light-emitting signal lines (E1 to Eo). The pixel array may include a plurality of sub-pixels Pxij, where i and j may be natural numbers. At least one sub-pixel Pxij may include a circuit unit and a light-emitting device connected to the circuit unit. The circuit unit may include a pixel driving circuit, which is connected to the scan signal lines, the light-emitting signal lines, and the data signal lines. In an exemplary embodiment, the timing controller may provide grayscale values ​​and control signals suitable for the specifications of the data driver to the data driver, may provide clock signals and scan start signals suitable for the specifications of the scan driver to the scan driver, and may provide clock signals and emission stop signals suitable for the specifications of the light-emitting driver to the light-emitting driver. The data driver can generate data voltages to be supplied to data signal lines D1, D2, D3, ..., and Dn using grayscale values ​​and control signals received from a timing controller. For example, the data driver can sample grayscale values ​​using a clock signal and apply data voltages corresponding to the grayscale values ​​to data signal lines D1 to Dn on a per-row basis, where n can be a natural number. The scan driver can generate scan signals to be supplied to scan signal lines S1, S2, S3, ..., and Sm by receiving clock signals, scan start signals, and the like from the timing controller. For example, the scan driver can sequentially supply scan signals having on-level pulses to scan signal lines S1 to Sm. For example, the scan driver can be configured as a shift register and can sequentially transmit scan start signals provided in the form of on-level pulses to the next-stage circuit under the control of a clock signal, where m can be a natural number. The light driver can generate emission signals to be supplied to light signal lines E1, E2, E3, ..., and Eo by receiving clock signals, emission stop signals, and the like from the timing controller. For example, the light emitting driver may sequentially provide emission signals having off-level pulses to the light emitting signal lines E1 to Eo. For example, the light emitting driver may be configured as a shift register and may generate emission signals by sequentially transmitting emission stop signals provided in the form of off-level pulses to the next stage circuit under the control of a clock signal. o may be a natural number. In an exemplary embodiment, the pixel array may be provided on a display substrate.

[0107] Figure 2 is a schematic diagram of a planar structure of a display substrate. As shown in Figure 2, the display substrate may include a plurality of pixel units P arranged in a matrix, and at least one pixel unit P may include a first sub-pixel P1 that emits a first color light, a second sub-pixel P2 that emits a second color light, and a third sub-pixel P3 that emits a third color light. Each sub-pixel may include a circuit unit and a light-emitting device. The circuit unit may include at least a pixel driving circuit. The pixel driving circuit is respectively connected to a scan signal line, a light-emitting signal line, and a data 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 device in each sub-pixel is respectively connected to the pixel driving circuit of the sub-pixel in which it is located. The light-emitting device is configured to emit light of corresponding brightness in response to the current output by the pixel driving circuit of the sub-pixel in which it is located.

[0108] 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.

[0109] 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.

[0110] FIG3 is a schematic diagram of a cross-sectional structure of a display substrate. As shown in FIG3 , in a plane perpendicular to the display substrate, the display substrate may include a driving circuit layer 20 disposed on a glass substrate 10, a light-emitting structure layer 30 disposed on a side of the driving circuit layer 20 away from the glass substrate 10, and an encapsulation structure layer 40 disposed on a side of the light-emitting structure layer 30 away from the glass substrate 10. 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.

[0111] In an exemplary embodiment, the glass substrate 10 may be a flexible substrate or a rigid substrate. The driving circuit layer 20 may include a plurality of circuit units, each of which may include at least a pixel driving circuit composed of a plurality of transistors and a storage capacitor. The light-emitting structure layer 30 may include a plurality of light-emitting devices, each of which may include at least an anode, a pixel definition layer, 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 under the drive of the anode and cathode. The encapsulation structure layer 40 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 disposed 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 30, but is not limited to this. For example, the first encapsulation layer, the second encapsulation layer, and the third encapsulation layer may all be inorganic materials or organic materials.

[0112] Currently, in OLED displays without a light-efficiency-enhancing structure, only 20% of the light emitted by the light-emitting device exits from the front of the display. This means that 80% of the light cannot escape from the end face of the glass substrate away from the light-emitting device and is lost, resulting in low luminous efficiency. For bottom-emitting devices, although related OLED displays have a light-efficiency-enhancing structure that allows more light to escape from the end face of the glass substrate away from the light-emitting device, while this can improve luminous efficiency to a certain extent, the improvement is not ideal.

[0113] FIG4 is a schematic diagram of a display substrate according to an exemplary embodiment. FIG5 is a schematic cross-sectional view taken along line AA in FIG4 . FIG6 is a schematic cross-sectional view taken along line BB in FIG4 . Embodiments of the present disclosure provide a display substrate. As shown in FIG4 to FIG6 , the display substrate may include a glass substrate 10, a composite layer 15, and a planar layer 23 disposed in a direction away from the glass substrate 10. The end surface of the glass substrate 10 proximal to the composite layer 15 may include a first lens area 10c, and the end surface of the composite layer 15 and / or the planar layer 23 distal to the glass substrate 10 may include a second lens area 23a. The orthographic projection of the second lens area 23a on the glass substrate 10 is arranged to at least partially overlap with the first lens area 10c. Thus, the display substrate includes at least two layers of microlens arrays (MLAs), allowing more light to exit the display substrate, thereby improving the brightness and luminous efficiency of the display substrate, while also reducing power consumption when a predetermined light intensity is achieved.

[0114] Figure 7 is a schematic diagram of the glass substrate in Figure 5, and Figure 8 is a partially enlarged schematic diagram of point D in Figure 7. In some exemplary embodiments, as shown in Figures 7 and 8, the material of the glass substrate 10 can be translucent glass, and the refractive index of the glass substrate 10 can be less than 1.55. The display substrate of this example can emit light on the side having the glass substrate 10. The surface of one side of the glass substrate 10 includes a light-emitting area 10a and a circuit area 10b. The light-emitting area 10a may include a first lens area 10c. A plurality of first microlenses 13 are evenly arranged within the first lens area 10c. The plurality of first microlenses 13 are arranged in an array, forming a microlens array (MLA). In an exemplary embodiment, the plurality of first microlenses 13 within the first lens area 10c have a uniform structure and size. The microlens array can converge light, thereby improving brightness and viewing angles, and has the characteristics of miniaturization, lightweight, and array-based design, while also improving color rendering.

[0115] In some exemplary embodiments, as shown in Figures 5, 6, 7, and 8, the first microlens 13 may be a first curved surface 14 formed by a depression on the surface of the glass substrate 10 facing the composite layer 15. The first curved surface 14 may be recessed toward the surface of the glass substrate 10 facing away from the composite layer 15, forming a curved groove structure. The height of the first curved surface 14 may be set to the maximum distance between the first curved surface 14 and the surface of the glass substrate 10 facing the composite layer 15, i.e., the maximum dimension H1 of the first curved surface 14 in a direction perpendicular to the glass substrate 10. The value of H1 may be 0.5 μm (micrometer) to 25 μm (micrometer). In an exemplary embodiment, the cross-section of the first curved surface 14 in a direction parallel to the glass substrate 10 is circular. The maximum diameter of the cross-section of the first curved surface 14 in a direction parallel to the glass substrate 10 may be D1. The value of D1 may be 1 μm (micrometer) to 50 μm (micrometer). The glass substrate 10 has a plurality of light emitting areas 10 a arranged at intervals. The circuit area 10 b can separate the plurality of light emitting areas 10 a. The sizes and arrangements of the first micro lenses 13 in the plurality of light emitting areas 10 a can be consistent.

[0116] In some exemplary embodiments, as shown in Figures 5 to 7, a composite layer 15 may be formed over the glass substrate 10. The composite layer 15 may be made of an organic-inorganic hybrid resin. This light-transmitting material is a mixture of inorganic and organic materials. The organic-inorganic hybrid resin contains silicon (Si), oxygen (O), and nitrogen (N). The organic-inorganic hybrid resin has excellent heat resistance, capable of withstanding temperatures of 300°C to 500°C. The composite layer 15 is a hybrid of inorganic and organic materials, allowing it to function as both a planarization layer and a buffer layer. The refractive index of the composite layer 15 may be between 1.5 and 1.9, and can be adjusted by adjusting the ratio of oxygen (O) to nitrogen (N) in the organic-inorganic hybrid resin. Furthermore, the refractive index of the composite layer 15 may be greater than that of the glass substrate 10. The plane of the composite layer 15 facing away from the glass substrate 10 is parallel to the glass substrate 10. The protruding portion of the composite layer 15's surface on the side closest to the glass substrate 10 fills the arc-shaped groove formed by the depression of the first arc-shaped surface 14. Glass substrate 10 also includes a first metal layer 12. First metal layer 12 is arranged corresponding to circuit area 10b and at least partially covered by first metal layer 12. First metal layer 12 can be made of copper (Cu), aluminum (Al), silver (Ag), titanium (Ti), molybdenum (Mo), or an alloy of a low-resistance metal. A portion of first metal layer 12 can serve as a light shield to block light from escaping, while another portion of first metal layer 12 can serve as an SD or VDD trace. Multiple light emitting areas 10a can be provided, and first metal layer 12 can be arranged in the circuit areas 10b separating the multiple light emitting areas 10a.

[0117] FIG9 is a partial enlarged schematic diagram of point C in FIG5 . In some exemplary embodiments, as shown in FIG5 and FIG10 , the display substrate further includes a first buffer layer 16, an interlayer dielectric / passivating film (ILD / PVX) 17, and a driving circuit assembly 18. The first metal layer 12, the composite layer 15, the first buffer layer 16, the interlayer dielectric / passivating film (ILD / PVX) 17, and the driving circuit assembly 18 may constitute a driving circuit layer 20, which covers the glass substrate 10. The composite layer 15, the first buffer layer 16, and the interlayer dielectric (ILD / PVX) 17 are stacked sequentially in a direction away from the glass substrate 10. The driving circuit assembly 18 is located between the glass substrate 10 and the interlayer dielectric (ILD / PVX) 17 and is electrically connected to the first metal layer 12 via a via structure. The interlayer dielectric (ILD / PVX) 17 covers the driving circuit assembly 18.

[0118] FIG10 is a partial schematic diagram of the display substrate in FIG6 . In some exemplary embodiments, as shown in FIG5 , FIG6 , and FIG10 , the display substrate further includes a first electrode layer 34 , a pixel definition layer 36 , a light-emitting layer 38 , a second electrode layer 43 , and a filter layer 21 . The first electrode layer 34 , the light-emitting layer 38 , and the second electrode layer 43 may be stacked sequentially in a direction away from the glass substrate 10 . The first electrode layer 34 may be located on the side of the planar layer 23 away from the glass substrate 10 . The first electrode layer 34 may be a light-transmitting electrode. The pixel definition layer 36 may enclose a plurality of pixel openings 37 , with the light-emitting layer 38 located within the pixel openings 37 . The pixel definition layer 36 may be made of a light-transmitting material. The second electrode layer 43 may be a high-reflectivity electrode that reflects light transmitted through the pixel definition layer 36 back toward the glass substrate 10 . The first electrode layer 34 , the pixel definition layer 36 , the light-emitting layer 38 , the second electrode layer 43 , the planar layer 23 , and the filter layer 21 may constitute the light-emitting structure layer 30 .

[0119] In some exemplary embodiments, as shown in Figures 5, 6, and 10, the second electrode layer 43 is configured to form a plurality of first grooves 48 with openings facing the glass substrate 10. The second electrode layer 43 includes a plurality of groove portions 49 and a plurality of covering portions 50 arranged alternately in a direction parallel to the glass substrate 10. The groove portions 49 may be groove-shaped, and the covering portions 50 cover the surface of the driving circuit layer 20 away from the glass substrate 10. The groove portion 49 includes groove sidewalls 59 and a groove bottom wall 60. The groove sidewalls 59 may be arranged to form a ring in a direction parallel to the glass substrate 10, and the groove bottom wall 60 is parallel to the glass substrate 10 and may close the end of the groove sidewall 59 away from the glass substrate 10. The second electrode layer 43 may be a high-reflectivity electrode and may function as a cathode.

[0120] In some exemplary embodiments, as shown in Figures 5, 6, and 10, pixel definition layer 36 includes a plurality of pixel-defining units 46 spaced apart in a direction parallel to the glass substrate. Each of these pixel-defining units 46 encloses a pixel opening 37, resulting in pixel definition layer 36 having a plurality of independent pixel-defining units 46. In an exemplary embodiment, the number of pixel-defining units 46 matches the number of pixel openings 37. Light-emitting layer 38 includes a plurality of light-emitting members 39. These light-emitting members 39 may be arranged in a one-to-one correspondence with the pixel-defining units 46, i.e., each light-emitting member 39 is arranged within the pixel opening 37 of a corresponding pixel-defining unit 46. Furthermore, each light-emitting member 39 and the corresponding pixel-defining unit 46 are positioned within a first recess 48, resulting in a one-to-one correspondence between the light-emitting members 39 and the first recess 48. Light-emitting members 39 can emit white light when powered. Thus, the first groove 48 surrounded by the second electrode layer 43 provides installation space for the light-emitting component 39 and the pixel defining unit 46, and separates adjacent light-emitting components 39 and adjacent pixel defining units 46. The light emitted by the light-emitting component 39 can only be irradiated toward the glass substrate 10 through the notch of the first groove 48, and multiple light-emitting components 39 share one cathode.

[0121] In some exemplary embodiments, as shown in Figures 5, 6 and 10, the first electrode layer 34 includes a plurality of first electrode units 47 arranged at intervals in a direction parallel to the glass substrate 10, the flat layer 23 includes a plurality of flat units 45 arranged at intervals in a direction parallel to the glass substrate 10, and the filter layer 21 includes a plurality of filters 31 arranged at intervals in a direction parallel to the glass substrate 10. The first electrode units 47, the flat units 45, and the filters 31 can all correspond one-to-one to the first grooves 48 and be located in the first grooves 48. The filters 31, the flat units 45, and the first electrode units 47 are stacked in sequence in a direction away from the glass substrate 10. Therefore, the first groove 48 surrounded by the second electrode layer 43 also provides installation space for the first electrode unit 47, the flat unit 45, and the filter 31, and separates adjacent first electrode units 47, adjacent flat units 45, and adjacent filters 31. The light emitted by the light-emitting component 39 passes through the flat unit 45 and is filtered by the filter 31, and then irradiated toward the glass substrate 10 through the notch of the first groove 48.

[0122] In some exemplary embodiments, as shown in Figures 5, 6, and 10, the filter layer 21 can filter light, converting white light into light of a predetermined color. The filter layer 21 can include a red filter, a green filter, or a blue filter. Specifically, the multiple filters 31 can be red filters, green filters, or blue filters. In some exemplary embodiments, the first microlenses 13 in the light output area 10a corresponding to different filters 31 have different sizes and arrangements, enabling differentiated configurations for sub-pixels of different colors to meet the light extraction intensity requirements for different sub-pixels. For example, if each light-emitting member 39 emits white light, the multiple filters 31 can be divided into three types: a first filter 31 that filters white light into red light, a second filter 31 that filters white light into green light, and a third filter 31 that filters white light into blue light. The sizes and arrangements of the first microlenses 13 corresponding to the three filters 31 differ, resulting in different intensities for red, green, and blue light, meeting the light extraction intensity requirements for different sub-pixels of different colors. The orthographic projection of the pixel opening 37 on the glass substrate 10 can be located within the orthographic projection of the filter layer 21 on the glass substrate 10. Another portion of the end surface of the driving circuit layer 20, which is away from the glass substrate 10, is covered by the covering portion 50 of the second electrode layer 43. The refractive index of the planar layer 23 is set to be greater than that of the filter layer 21. The first electrode unit 47 can be made of a light-transmitting electrode material. The first electrode unit 4 can serve as an anode. Each light-emitting component 31 uses its corresponding first electrode unit 4 as an anode, but all use the second electrode layer as a cathode, forming a common cathode. The planar unit 45 can be made of a light-transmitting material. As a result, the white light emitted by the light-emitting component 39 passes through the first electrode unit 47 and the planar unit 45, is filtered by the filter 31 into light of a predetermined color, and then passes through the driving circuit layer 20 and the glass substrate 10 to exit the display substrate.

[0123] In some exemplary embodiments, as shown in Figures 5, 6, and 10, the surface of the flat layer 23 facing away from the glass substrate 10 may include a second lens area 23a. The orthographic projection of the second lens area 23a on the glass substrate 10 is located within the first lens area 10c. The flat layer 23 may have multiple second lens areas 23a, with each flat unit 45 having a second lens area 23a. The second lens areas 23a correspond one-to-one with the first lens areas 10c. Multiple second microlenses 26 are evenly arranged within the second lens areas 23a. The multiple second microlenses 26 are arranged in an array to form a microlens array. The second microlenses 26 may be a second curved surface 27 that is recessed on the surface of the flat layer 23 facing away from the glass substrate 10. The second curved surface 27 may be recessed toward the surface of the flat layer 23 facing away from the light-emitting structure layer 30, forming an arc-shaped groove structure. The second curved surface 27 and the first curved surface 14 may be identical in structure, size, and arrangement, but are not limited thereto. For example, the second curved surface 27 and the first curved surface 14 may differ in at least one of the following: structure, size, and arrangement. The orthographic projection of the pixel definition layer 36 on the glass substrate 10 at least overlaps with the orthographic projection of the first lens area 10 c and / or the second lens area 23 a on the glass substrate 10 . The orthographic projections of the first lens area 10 c and the second lens area 23 a on the glass substrate 10 are both located within the orthographic projection of the filter layer 21 on the glass substrate 10 .

[0124] In some exemplary embodiments, the surface of the flat layer 23 away from the glass substrate 10 may include a second lens area 23 a. The end surface of the glass substrate 10 near the composite layer 15 may include a plurality of first lens areas 10 c. The second lens areas 23 a correspond to the first lens areas 10 c one-to-one. The second curved surface 27 of the second lens area 23 a and the first curved surface 14 of the first lens area 10 c are of different sizes. The size of the first curved surface 14 in the direction perpendicular to the glass substrate 10 is larger than the size of the second curved surface 27 in the direction perpendicular to the glass substrate 10. In addition, the orthographic projection area of ​​a single first curved surface 14 on the glass substrate 10 is larger than the orthographic projection area of ​​a single second curved surface 27 on the glass substrate 10.

[0125] In some exemplary embodiments, as shown in Figures 5, 6, and 10, the circumferential end surfaces of the pixel-defining elements 46 are first end surfaces 51. First end surfaces 51 are the outer surfaces of the pixel-defining elements 46 in a direction parallel to the glass substrate 10. That is, each first end surface 51 is the end surface of the pixel-defining element 46 facing the adjacent pixel-defining element 46. The circumferential end surfaces of the planar elements 45 are second end surfaces 52. Second end surfaces 52 are the outer surfaces of the planar elements 45 in a direction parallel to the glass substrate 10. That is, second end surfaces 52 are the end surfaces of each planar element 45 facing the adjacent planar element 45. The circumferential end surfaces of the optical filters 31 are third end surfaces 53. Third end surfaces 53 are the outer surfaces of the optical filters 31 in a direction parallel to the glass substrate 10. That is, third end surfaces 53 are the end surfaces of each optical filter 31 facing the adjacent optical filters 31. The light-emitting member 39, pixel-defining unit 46, first electrode unit 47, flat unit 45, and filter 31 all correspond to and reside within the first groove 48, so that the groove sidewalls 59 of the groove portion 49 in the second electrode layer 43 cover the first end surface 51, the second end surface 52, and the third end surface 53, thereby preventing color mixing, that is, preventing cross-mixing of light filtered by adjacent filters 31. As a result, the second electrode layer 43 forms a reflective structure covering the first end surface 51, the second end surface 52, and the third end surface 53. This reflective structure can reflect the wide-angle light emitted by the sub-pixels, converging the light and improving light extraction efficiency.

[0126] In some exemplary embodiments, as shown in FIG. 9 , the driving circuit assembly 18 includes a connecting electrode 19. The first electrode unit 47 of the first electrode layer 34 is electrically connected to the connecting electrode 19 through the via 32. The connecting electrode 19 may be provided with an opaque light-shielding layer 54 corresponding to the via 32 to block light directly irradiated from the via 32 onto the glass substrate 10, thereby preventing the mixing of white light directly irradiated from the via 32 onto the glass substrate 10 and light with other colors transmitted through the filter 31. The light-shielding layer 54 may be a highly reflective metal film and may cover the end surface of the connecting electrode 19 facing the via 32. The via 32 extends perpendicular to the glass substrate 10, penetrating the planar layer 23 and the filter layer 21 and extending to the connecting electrode 19. The pixel definition layer 36 covers the via 32.

[0127] In some exemplary embodiments, as shown in Figures 5 and 6, the display substrate further includes an encapsulation structure layer 40, which includes an encapsulation film 43 and a cover plate 44. The cover plate 44 is mounted on the side of the encapsulation film 43 facing away from the glass substrate 10. The encapsulation film 43 can be one or more layers of inorganic or organic thin films. The encapsulation film 43 covers the end surface of the light-emitting structure layer 30 facing away from the glass substrate 10. The encapsulation film 43 prevents water and oxygen from entering the display substrate, providing excellent water and oxygen isolation. The cover plate 44 covers the side of the encapsulation film 43 facing away from the glass substrate 10 and provides protection for the display substrate.

[0128] In some exemplary embodiments, the display substrate of this example may be bottom-emitting, with the glass substrate 10 located at the bottom of the display substrate. When powered, the light emitting member 39 can illuminate the glass substrate 10 directly from the light emitting member 39. Light can be filtered by the filter 31 and then emitted from the notch of the first groove 48 toward the glass substrate 10. Light irradiated by the light emitting member 39 toward the pixel defining unit 36 ​​is then reflected by the second electrode layer toward the glass substrate 10 after passing through the pixel defining unit 36. This allows more light to be emitted from the light emitting structure layer 20, thereby increasing brightness and luminous efficiency, and reducing power consumption when the preset brightness is achieved.

[0129] FIG11 is a schematic cross-sectional view of another display substrate according to an exemplary embodiment. In some exemplary embodiments, as shown in FIG11 , the driving circuit assembly 18 includes a connecting electrode 19. The first electrode unit 47 of the first electrode layer 34 is electrically connected to the connecting electrode 19 through a via 32. The first electrode layer 34 may be provided with an opaque light-shielding layer 54 corresponding to the via 32 to block light directly irradiated from the via 32 onto the glass substrate 10, thereby preventing the mixing of white light directly irradiated from the via 32 onto the glass substrate 10 and light with other colors transmitted through the filter 31. The light-shielding layer 54 may be a highly reflective metal film. The first electrode unit 47 includes a via-hole connecting portion 55 located within the via 32. The via-hole connecting portion 55 covers the wall of the via 32. The light-shielding layer 54 covers the via 32. In this example, the light-shielding layer 54 covers the end surface of the via-hole connecting portion 55 away from the connecting electrode 19.

[0130] FIG12 is a schematic cross-sectional view of another display substrate according to an exemplary embodiment. In some exemplary embodiments, as shown in FIG12 , the driving circuit assembly 18 includes a connecting electrode 19. The first electrode unit 47 of the first electrode layer 34 is electrically connected to the connecting electrode 19 through a via 32. The first electrode layer 34 and the connecting electrode 19 may be provided with an opaque light-shielding layer 54 corresponding to the via 32 to block light directly irradiated from the via 32 onto the glass substrate 10, thereby preventing the mixing of white light directly irradiated from the via 32 onto the glass substrate 10 and light with other colors transmitted through the filter 31. The light-shielding layer 54 may be a highly reflective metal film and include a first light-shielding portion 56 and a second light-shielding portion 57. The first electrode unit 47 includes a via-hole connecting portion 55 located within the via 32, covering the wall of the via 32. The first light-shielding portion 56 may cover the end surface of the via-hole connecting portion 55 facing away from the connecting electrode 19, while the second light-shielding portion 57 may cover the end surface of the connecting electrode 19 facing the via 32.

[0131] FIG13 is a schematic cross-sectional view of another exemplary embodiment of a display substrate. In some exemplary embodiments, as shown in FIG13 , the display substrate may include a glass substrate 10, and a composite layer 15 and a planar layer 23 stacked in a direction away from the glass substrate 10. The glass substrate 10 may include a first lens region 10c on the end surface proximal to the composite layer 15, which is arranged with a plurality of first microlenses 13 arranged in an array, forming a microlens array. The planar layer 23 is not provided with a microlens array. The composite layer 15 may include a second lens region 23a on the end surface distal from the glass substrate 10, which is arranged with a plurality of second microlenses 26 arranged in an array, forming a microlens array. The orthographic projection of the second lens region 23a on the glass substrate 10 is arranged to at least partially overlap with the first lens region 10c. Thus, the display substrate comprises two layers of microlens arrays, allowing more light to exit the display substrate, improving the display substrate's brightness and luminous efficiency, while also reducing power consumption when a predetermined light intensity is achieved.

[0132] FIG14 is a schematic cross-sectional view of another display substrate according to an exemplary embodiment. In some exemplary embodiments, as shown in FIG14 , the display substrate may include a glass substrate 10. The glass substrate 10 may include a first lens region 10c on its end surface near the composite layer 15, where a plurality of first microlenses 13 are arranged in an array, forming a microlens array. Thus, the display substrate comprises a single layer of a microlens array. A first recess 48 formed by the second electrode layer 43 also provides mounting space for the light-emitting components 31, first electrode units 47, flat units 45, and color filters 31. Furthermore, adjacent light-emitting components 31, first electrode units 47, flat units 45, and color filters 31 are separated from each other. Light emitted by the light-emitting components 39 is filtered by the color filters 31 and then irradiated toward the glass substrate 10 through the notches of the first recess 48. Furthermore, the second electrode layer 43 forms a reflective structure that reflects wide-angle light emitted by the sub-pixels, converging the light and improving light extraction efficiency.

[0133] In an exemplary embodiment, the preparation process of the display substrate as shown in FIG. 5 and FIG. 6 may include the following operations.

[0134] (1) A plurality of first microlenses are formed on a glass substrate.

[0135] FIG15 is a first schematic diagram of preparing the display substrate in FIG5 . In some exemplary embodiments, as shown in FIG5 to FIG8 and FIG15 , forming a plurality of first microlenses on a glass substrate may include: first forming a blocking layer pattern 11 on a glass substrate 10, and then etching to form first microlenses 13 on the glass substrate 10.

[0136] In some exemplary embodiments, the surface of the glass substrate 10 facing the light-emitting structure layer 30 includes a light-emitting region 10a and a circuit region 10b. The light-emitting region 10a further includes a first lens region 10c. The shielding layer pattern 11 includes a first metal layer 12 covering the surface of the glass substrate 10. The circuit region 10b is at least partially covered by the first metal layer 12. The first metal layer 12 can be made of copper (Cu), aluminum (Al), silver (Ag), titanium (Ti), molybdenum (Mo), or an alloy of a low-resistance metal. A portion of the first metal layer 12 can serve as a light shield to block light from escaping, while another portion of the first metal layer 12 can serve as an SD or VDD trace. Multiple light-emitting regions 10a can be provided, and the circuit regions 10b can separate the multiple light-emitting regions 10a.

[0137] In some exemplary embodiments, forming the blocking layer pattern 11 includes first depositing a first metal film on the glass substrate 10, then coating the first metal film with photoresist, exposing it to ultraviolet light using a first mask after pre-baking, and retaining the photoresist pattern only at the position of the first metal layer 12 after development. Thereafter, after post-baking, etching, and stripping the photoresist, the blocking layer pattern 11 is obtained.

[0138] In some exemplary embodiments, a plurality of first microlenses 13 are evenly arranged within the first lens region 10c, and the plurality of first microlenses 13 are arranged in an array to form a microlens array. The first microlens 13 may be a first curved surface 14 that is recessed on the surface of the glass substrate 10 facing the light-emitting structure layer 30. The first curved surface 14 may be recessed toward the surface of the glass substrate 10 facing away from the light-emitting structure layer 30, forming an arc-shaped groove structure. The height of the first curved surface 14 may be set to the maximum distance H1 between the first curved surface 14 and the surface of the glass substrate 10 facing the light-emitting structure layer 30, and the value of H1 may be 0.5 μm to 25 μm. In some exemplary embodiments, the cross-section of the first curved surface 14 parallel to the glass substrate 10 is circular, and the maximum diameter of the cross-section of the first curved surface 14 parallel to the glass substrate 10 may be D1, and the value of D1 may be 1 μm to 50 μm. Multiple light exit regions 10a are provided, and the size and arrangement of the first microlenses 13 in the multiple light exit regions 10a may be consistent.

[0139] In some exemplary embodiments, the first microlenses 13 may be formed by etching the glass substrate 10 using either wet etching or dry etching. In this embodiment, wet etching is used, and an HF series etching solution may be used during the etching process to remove a portion of the glass material on the glass substrate 10, thereby forming a concave first curved surface 14, as shown in FIG5 . However, this is not limiting. For example, dry etching may be used during the etching process, and an F series CF4 (carbon tetrafluoride) gas or SF6 (sulfur hexafluoride) gas may be used as an etching gas to remove a portion of the glass material on the glass substrate 10, thereby forming the concave first curved surface 14.

[0140] (2) Forming a driving circuit layer.

[0141] Figure 16 is a second preparation schematic diagram of the display substrate in Figure 5, and Figure 17 is a third preparation schematic diagram of the display substrate in Figure 5. In some exemplary embodiments, as shown in Figures 16 and 17, forming the driving circuit layer 20 includes first forming a composite layer 15, and then preparing a first buffer layer (buffer) 16, an interlayer insulating layer (ILD / PVX) 17, and a driving circuit component 18 through processes such as deposition and etching to constitute the driving circuit layer 20, and the driving circuit layer 20 is covered on the glass substrate 10.

[0142] In some exemplary embodiments, the driving circuit layer 20 includes a stacked composite layer 15, a first buffer layer 16, and an interlayer insulating layer (ILD / PVX) 17. The first buffer layer 16 covers the side of the composite layer 15 away from the glass substrate 10, and the interlayer insulating layer (ILD / PVX) 17 is located on the side of the first buffer layer 16 away from the composite layer 15. The driving circuit component 18 is connected to the first metal layer 12 through a via structure. The driving circuit component 18 includes a connecting electrode 19, which can be made of an opaque metal material.

[0143] In some exemplary embodiments, forming the composite layer first may include uniformly applying a liquid solvent containing a dielectric material onto the glass substrate 10 having the first microlenses 13 via spin-on-glass (SOG) coating, followed by heat treatment to cure the composite layer. The coating of the liquid solvent may fill the arc-shaped groove formed by the depression of the first arc-shaped surface 14.

[0144] In some exemplary embodiments, the material of the composite layer 15 may be an organic-inorganic hybrid resin containing silicon (Si), oxygen (O) and nitrogen (N). The organic-inorganic hybrid resin has good heat resistance and can withstand high temperatures of 300°C to 500°C. The composite layer 15 is a hybrid of inorganic and organic materials, so that the composite layer 15 has the functions of both a flat layer and a buffer layer. The refractive index of the composite layer 15 may be 1.5 to 2.0, and the refractive index of the composite layer 15 can be changed by adjusting the content ratio of oxygen (O) and nitrogen (N) in the organic-inorganic hybrid resin. In addition, the refractive index of the composite layer 15 is greater than the refractive index of the glass substrate 10. The plane of the composite layer 15 away from the glass substrate 10 is parallel to the glass substrate 10, and the protruding portion of the surface of the composite layer 15 on the side close to the glass substrate 10 fills the arc-shaped groove formed by the depression of the first arc-shaped surface 14.

[0145] (3) A plurality of second microlenses are formed on the flat layer.

[0146] FIG18 is a fourth schematic diagram of preparing the display substrate in FIG5 , FIG19 is a fifth schematic diagram of preparing the display substrate in FIG5 , and FIG20 is a partially enlarged schematic diagram of point E in FIG19 . In some exemplary embodiments, as shown in FIG18 to FIG20 , forming the first microlens may include: first forming a filter layer pattern 28 on the driving circuit layer 20 , forming a flat layer pattern 29 , and etching the second microlens 26 .

[0147] In some exemplary embodiments, forming a filter layer pattern 28 on the driving circuit layer 20 includes first depositing a color film on the driving circuit layer 20, and then forming a filter layer 21 by etching to obtain the filter layer pattern 28. The filter layer pattern 28 includes a filter layer 21 covering the driving circuit layer 20. The orthographic projection of the filter layer 21 on the glass substrate 10 is located within the light exit area. The filter layer 21 may include a plurality of filters 31 arranged at intervals on a plane parallel to the glass substrate 10. The filters 31 are formed by etching the color film. The filter layer 21 can filter light, filtering white light into light of a predetermined color. The filter layer 21 can be a red filter, a green filter, or a blue filter. The filter layer 21 has a first through hole 22, which penetrates the filter layer 21 in a direction perpendicular to the glass substrate 10.

[0148] In some exemplary embodiments, forming the planarization layer pattern 29 includes coating an organic material layer and then etching to form a planarization layer 23, thereby obtaining the planarization layer pattern 29. The filter layer pattern 28 includes a planarization layer 23 disposed on the filter layer pattern 28. The planarization layer 23 completely covers the end surface of the filter layer 21 away from the driving circuit layer 20. The planarization layer 23 includes a second through hole 24, which penetrates the planarization layer 23 in a direction perpendicular to the glass substrate 10 and is connected to the first through hole 22. In addition, the interlayer insulating layer (ILD / PVX) 17 includes a third through hole 25 on an end surface near the planarization layer 23. One end of the third through hole 25 is connected to the second through hole 24, and the other end extends to the connection electrode 19. Thus, the first through hole 22, the second through hole 24, and the third through hole 25 form a via 32 extending perpendicular to the glass substrate 10.

[0149] In some exemplary embodiments, the second microlenses 26 may be etched using dry etching to remove a portion of the material on the flat layer 23, thereby forming recessed second microlenses 26. The surface of the flat layer 23 facing away from the glass substrate 10 may include a second lens region 23a, the orthographic projection of which on the glass substrate 10 is located within the first lens region 10c. The flat layer 23 may have multiple second lens regions 23a, each corresponding to a first lens region 10c. Multiple second microlenses 26 are evenly arranged within the second lens region 23a, and the multiple second microlenses 26 are arranged in an array to form a microlens array. The second microlenses 26 may be recessed second curved surfaces 27 located on the surface of the flat layer 23 facing away from the glass substrate 10. The second curved surfaces 27 may be recessed toward the surface of the flat layer 23 facing away from the light-emitting structure layer 30, forming an arc-shaped groove structure. The height of the second curved surface 27 can be set to the maximum distance H2 between the second curved surface 27 and the surface of the flat layer 23 facing the light-emitting structure layer 30. The value of H2 can be 0.5μm to 25μm. In some exemplary embodiments, the cross-section of the second curved surface 27 parallel to the glass substrate 10 is circular. The maximum diameter of the cross-section of the second curved surface 27 parallel to the glass substrate 10 can be D2. The value of D2 can be 1μm to 50μm. In addition, the second curved surface 27 and the first curved surface 14 have the same structure, size, and arrangement, but are not limited to this. For example, the second curved surface 27 and the first curved surface 14 may differ in at least one of the following: structure, size, and arrangement.

[0150] (4) Forming a light-emitting structure layer.

[0151] Figure 21 is a sixth preparation schematic diagram of the display substrate in Figure 5, Figure 22 is a seventh preparation schematic diagram of the display substrate in Figure 5, Figure 23 is an eighth preparation schematic diagram of the display substrate in Figure 5, and Figure 24 is a ninth preparation schematic diagram of the display substrate in Figure 5. In some exemplary embodiments, as shown in Figures 21 to 24, forming a light-emitting structure layer may include: forming a first electrode pattern 33, forming a pixel definition layer pattern 35, forming a light-emitting layer 38, and forming a second electrode layer 42.

[0152] In some exemplary embodiments, as shown in Figures 20 and 21, forming the first electrode pattern 33 includes first depositing a thin electrode film on the planar layer pattern 29 where the second microlenses 26 are etched, and then etching the thin electrode film to form the first electrode pattern 33. The first electrode pattern 33 includes a stacked filter layer 24 and planar layer 23, as well as a first electrode layer 34. The first electrode layer 34 covers the second lens area 23a on the planar layer 23 and extends into the via 32, where it mates with the connecting electrode 19, thereby connecting the first electrode layer 34 to the via 32 of the driving circuit. The first electrode layer 34 can function as an anode. The first electrode layer 34 can be a light-transmitting electrode, allowing light to pass through. The connecting electrode 19 and / or the first electrode layer 34 can be configured as a light-opaque structure to prevent light from directly transmitting through the first electrode layer 34 at the via 32 and then continuing toward the glass substrate 10. The first electrode layer 34 can cover the entire wall of the via 32, or only a portion of the wall.

[0153] In some exemplary embodiments, as shown in Figures 21 and 22, forming the pixel definition layer pattern 35 includes first depositing a layer of inorganic material film on the first electrode pattern 33, and then forming the pixel definition layer pattern 35 by etching. The pixel definition layer pattern 35 includes a pixel definition layer 36 covering the first electrode pattern 33. The pixel definition layer 36 is provided with a pixel opening 37, which exposes the first electrode layer 34. The pixel definition layer 36 is located on the side of the first electrode layer 34 away from the glass substrate 10, and a portion of the pixel definition layer 36 fills the gap left by the via 32. There are multiple pixel openings 37, and the multiple pixel openings 37 are arranged in an array. The pixel definition layer 36 can be made of a high-transmittance material, which makes the pixel definition layer 36 more transparent, allowing more light to pass through the pixel definition layer 36.

[0154] In some exemplary embodiments, as shown in Figures 22 and 23, the light-emitting layer 38 can be formed by vapor deposition and deposited within the pixel openings 37. The light-emitting layer 38 covers the exposed end surface of the first electrode layer 34 that faces away from the glass substrate 10. The light-emitting layer 38 includes a plurality of light-emitting elements 39, each corresponding to a plurality of pixel openings 37. Each light-emitting element 39 is arranged within its corresponding pixel opening 37 and located on the side of the first electrode layer 34 facing away from the glass substrate 10. The orthographic projections of the light-emitting elements 39 on the glass substrate 10 are within the orthographic projection of the second lens area 23a on the glass substrate 10. The light-emitting elements 39 can emit white light when powered.

[0155] In some exemplary embodiments, as shown in Figures 21 to 24 , the color filter 31, the planar unit 45, the first electrode unit 47, the pixel defining unit 46, and the light-emitting member 39 constitute a first member 41, which covers the portion of the end surface of the driving circuit layer 20 that is away from the glass substrate 10. In the first member 41, the planar unit 45 has a recessed second curved surface 27, the first electrode unit 47 fills the groove structure formed by the second curved surface 27, and the light-emitting member 39 covers the first electrode unit 47. As a result, the light-emitting layer 38 and the first electrode layer 34 are both wavy in the portion corresponding to the second lens area 23a perpendicular to the glass substrate 10, rather than parallel to the glass substrate 10. In the first member 41, the circumferential end face of the first member 41 in a direction parallel to the glass substrate 10 is the fourth end face 58, the end face of the filter 31 in a direction parallel to the glass substrate 10 is the third end face 53, the end face of the flat unit 45 in a direction parallel to the glass substrate 10 is the second end face 52, and the end face of the pixel defining unit 46 in a direction parallel to the glass substrate 10 and away from the pixel opening 37 is the first end face 51. The fourth end face 58 is composed of the first end face 51, the second end face 52, and the third end face 53 arranged in sequence in a direction perpendicular to the glass substrate 10. The first member 41, the drive circuit layer 20, and the glass substrate 10 constitute an intermediate blank.

[0156] In some exemplary embodiments, as shown in Figures 21 to 24, forming the second electrode layer 42 includes depositing a thin electrode film on an intermediate blank formed by the first member 41, the driving circuit layer 20, and the glass substrate 10, thereby forming the second electrode layer 42. The second electrode layer 42 covers the outer surface of the first member 41 facing away from the driving circuit layer 20, as well as the fourth end face 58. The second electrode layer 42 also covers the portion of the end face of the driving circuit layer 20 facing away from the glass substrate 10 that is not covered by the first member 41. The second electrode layer 42 can serve as a cathode, with multiple light-emitting members 39 sharing a single cathode. The second electrode layer 42 can be made of a highly reflective metal so that it can reflect light irradiated by the light-emitting members 39 back toward the glass substrate 10.

[0157] (5) Forming a packaging structure.

[0158] In some exemplary embodiments, as shown in Figures 5 and 6, forming the encapsulation structure layer 40 may include: preparing an encapsulation film 43 on the light-emitting structure layer 30, and installing a cover plate 44 on the side of the encapsulation film 43 away from the glass substrate 10. The encapsulation film 43 may be one or more layers of inorganic or organic thin films. The encapsulation film 43 covers the end face of the light-emitting structure layer 30 away from the glass substrate 10 through thin film encapsulation technology (Thin Film Encapsulation, referred to as TFE). The encapsulation film 43 can prevent water and oxygen from entering the display substrate, providing the display substrate with good water and oxygen isolation properties. The cover plate 44 covers the side of the encapsulation film away from the glass substrate 10, and the cover plate 44 can provide protection for the display substrate.

[0159] The present disclosure also provides a display device, which may include the aforementioned display substrate. The display device may be any product or component with a display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigation system, but the embodiments of the present invention are not limited thereto.

[0160] Although the embodiments disclosed in this disclosure are as described above, the contents described are merely embodiments adopted to facilitate understanding of the disclosure and are not intended to limit the disclosure. Any person skilled in the art to which the disclosure belongs may make any modifications and changes in the form and details of the implementation without departing from the spirit and scope of the disclosure. However, the scope of patent protection of the present invention shall still be based on the scope defined by the appended claims.

Claims

1. A display substrate, wherein, it includes a glass substrate, a composite layer and a flat layer arranged in a direction away from the glass substrate; an end face of the glass substrate close to the composite layer includes a first lens area, and an end face of the composite layer and / or the flat layer away from the glass substrate includes a second lens area; a positive projection of the second lens area on the glass substrate at least partially overlaps with a positive projection of the first lens area on the glass substrate.

2. The display substrate according to claim 1, wherein, a plurality of first microlenses are arranged in the first lens area, and the first microlenses are arranged as a first arc surface recessed toward a side of the glass substrate away from the composite layer; a plurality of second microlenses are arranged in the second lens area, and the second microlenses are arranged as a second arc surface recessed toward the glass substrate.

3. The display substrate according to claim 2, wherein, structures and sizes of at least one of the first microlenses and the second microlenses are the same.

4. The display substrate according to claim 2, wherein, the material of the composite layer is an inorganic-organic hybrid resin, and the refractive index of the inorganic-organic hybrid resin is 1.5 to 1.

9.

5. The display substrate according to claim 2, wherein, a diameter of a cross-section of the first arc surface in a direction parallel to the glass substrate is set to be 1 micrometer to 50 micrometers; a maximum dimension of the first arc surface in a direction perpendicular to the glass substrate is set to be 0.5 micrometer to 25 micrometers.

6. The display substrate according to claim 2, wherein, it further includes a light filtering layer, the light filtering layer is arranged to cover an end face of the flat layer close to the glass substrate, and the refractive index of the flat layer is set to be greater than that of the light filtering layer; the refractive index of the composite layer is set to be greater than that of the glass substrate.

7. The display substrate according to claim 1, further includes a first electrode layer, a pixel definition layer, a light-emitting layer and a second electrode layer; the first electrode layer, the light-emitting layer and the second electrode layer are sequentially stacked in a direction away from the glass substrate, the first electrode layer is located on a side of the flat layer away from the glass substrate, and the first electrode layer is arranged as a transparent electrode; the pixel definition layer encloses a plurality of pixel openings, and the light-emitting layer is located in the pixel openings of the pixel definition layer; the second electrode layer is arranged to reflect light passing through the pixel definition layer toward the glass substrate.

8. The display substrate according to claim 7, wherein, a positive projection of the pixel definition layer on the glass substrate at least overlaps with a positive projection of the first lens area or / and the second lens area on the glass substrate.

9. The display substrate according to claim 7, wherein, the second electrode layer is arranged to enclose a plurality of first grooves with notches facing the glass substrate; the pixel definition layer includes a plurality of pixel defining units arranged at intervals in a direction parallel to the glass substrate, and the plurality of pixel defining units all enclose the pixel openings; the light-emitting layer includes a plurality of light-emitting members, and the light-emitting members and the pixel defining units are arranged in a one-to-one correspondence and are all located in the first grooves.

10. The display substrate according to claim 9, wherein, the flat layer includes a plurality of flat units, and the plurality of flat units are arranged to correspond to the plurality of pixel defining units one by one and are located in the first groove, and the second lens regions are provided on one side of the plurality of flat units away from the glass substrate.

11. The display substrate according to claim 10, further comprising a light filtering layer, and the light filtering layer is located on the side of the flat layer close to the glass substrate; the light filtering layer includes a plurality of light filtering films arranged at intervals in a direction parallel to the glass substrate, and the light filtering films are arranged to correspond to the pixel defining units one by one and are located in the first groove.

12. The display substrate according to claim 11, wherein, a plurality of the first lens regions are provided, the light filtering films are arranged to correspond to the first lens regions one by one, and the orthographic projection of the first lens region on the glass substrate is located within the orthographic projection of the light filtering film on the glass substrate.

13. The display substrate according to claim 11, further comprising a driving circuit layer, and the driving circuit layer is located between the glass substrate and the first electrode layer; the second electrode layer includes a groove portion and a covering portion alternately arranged in a direction parallel to the glass substrate, the groove portion is arranged in a groove shape, the groove portion encloses the first groove, and the covering portion covers the surface of the driving circuit layer away from the glass substrate.

14. The display substrate according to claim 13, wherein, the groove portion includes a groove side wall and a groove bottom wall, the groove side wall is arranged to form a ring in a direction parallel to the glass substrate, and the groove bottom wall is arranged to close one end of the groove side wall away from the glass substrate; the circumferential surface of the pixel defining unit in a direction parallel to the glass substrate is set as a first end face; the circumferential surface of the flat unit in a direction parallel to the glass substrate is set as a second end face; the circumferential surface of the light filtering film in a direction parallel to the glass substrate is set as a third end face; the first end face, the second end face and the third end face are arranged in sequence in a direction perpendicular to the glass substrate; the groove side wall is arranged to cover the first end face, the second end face and the third end face; the groove bottom wall is arranged to cover the pixel defining unit and the end face of the light emitting member away from the glass substrate.

15. The display substrate according to claim 11, further comprising a driving circuit assembly and a light shielding layer, and the driving circuit assembly is located between the flat layer and the composite layer; the first electrode layer includes a plurality of first electrode units, and the first electrode units are arranged in the first groove; the driving circuit assembly includes a connection electrode, and the first electrode unit is connected to the connection electrode through a via; the light shielding layer is set as a high reflectivity metal film, and the light shielding layer is located on the first electrode layer and / or the connection electrode and corresponds to the via to block the light directly irradiated to the glass substrate by the via.

16. The display substrate according to claim 15, wherein, The light-shielding layer is arranged to cover the end face of the connection electrode facing the via hole, and the orthographic projection of the light-shielding layer on the glass substrate is arranged to at least partially overlap with the orthographic projection of the via hole on the glass substrate.

17. The display substrate according to claim 15, wherein, the first electrode unit includes a via connection portion located in the via hole, and the light-shielding layer is arranged to cover the end face of the via connection portion away from the glass substrate.

18. The display substrate according to claim 15, wherein, the via hole is arranged to penetrate through the planarization layer and the light-filtering layer, the first electrode unit is arranged to cover at least part of the hole wall of the via hole, and the pixel definition layer extends into the via hole.

19. A manufacturing method, applied to the display substrate according to claim 1, wherein, it includes: forming a plurality of first microlenses on the glass substrate, a plurality of first microlenses are provided in the first lens area, and the first microlenses are arranged as a first arc surface that is recessed towards the end face of the glass substrate away from the composite layer; forming a plurality of second microlenses on the composite layer and / or the planarization layer, a plurality of second microlenses are provided in the second lens area, and the second microlenses are arranged as a second arc surface that is recessed towards the glass substrate.

20. A display device, wherein, it includes the display substrate according to any one of claims 1 to 18.

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