Display substrate, display apparatus, and method for preparing display substrate

Abstract

A display substrate, a display apparatus, and a method for preparing a display substrate, which belong to the technical field of display, and can solve the problem in the prior art of a display effect after an antenna structure is integrated into a display substrate. The display substrate comprises a base substrate (101), a plurality of light-emitting devices arranged on the base substrate (101), and a color filter layer (3) located on the side of the light-emitting surfaces of the light-emitting devices, wherein the color filter layer (3) comprises color filters (33) which are arranged in a manner corresponding to the light-emitting devices on a one-to-one basis, and a black matrix (2) located between color filters (33) which are arranged in a neighboring manner. The display substrate further comprises an antenna structure (1), which is arranged on the side of the color filter layer (3) that is close to the light-emitting devices, wherein the antenna structure (1) comprises a plurality of antenna units, and each antenna unit comprises a first radiation patch; and an orthographic projection of a conductive portion (13) of the first radiation patch on the base substrate (101) is located within an orthographic projection of the black matrix (2) on the base substrate (101).

Description

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

[0001] The present disclosure belongs to the field of display technology, and particularly relates to a display substrate, a display device, and a method for preparing the display substrate. Background Art

[0002] Organic Light-Emitting Diodes (OLEDs) offer advantages such as autonomous illumination, the ability to create flexible screens, high luminous efficiency, and fast response times. With advancements in screen manufacturing technology, OLED screen designs are pursuing higher screen-to-body ratios and greater integration of electronic components. Under-display fingerprint and camera technologies, which enable display functionality, allow ambient light to pass through the screen film to the underlying layer, where it is captured by the camera for imaging. This technology requires the film material of the OLED device to have relatively high transmittance.

[0003] 5G terminals must support multi-antenna technology to meet ultra-high transmission rate requirements. With the development of 5G, communication frequency bands will inevitably shift towards millimeter waves. The greatest advantage of millimeter waves is their abundant frequency resources. Millimeter wave bandwidth can reach 400 or even 800 Mbps, and wireless transmission speeds can reach 10 Gbps. Due to their small antennas, millimeter waves offer excellent spatial distribution capabilities. Furthermore, their bandwidth is large, four times that of 3.5G, resulting in low air interface latency, providing a natural advantage for the development of high-reliability, low-latency services. However, despite these advantages, millimeter waves also have some drawbacks, such as high path loss, poor coverage, and high penetration loss. Millimeter waves are easily obstructed during propagation, making them difficult to penetrate. Millimeter waves have relatively high frequencies and very small devices, so deploying antennas on a larger scale can mitigate these issues to a certain extent. In particular, the larger number of antennas allows for narrower beams. These narrow beams can, to a certain extent, compensate for the propagation and penetration losses caused by the high frequency, a characteristic of millimeter waves.

[0004] Therefore, existing on-screen antenna solutions integrate millimeter-wave antenna arrays with RF ICs to create compact antenna-in-package (AIP) antennas. However, AIP antenna modules are relatively thick (approximately 3mm), and the number of antenna modules a device can accommodate is limited. For example, each mobile phone can only accommodate a maximum of three antenna modules, making it difficult to meet the antenna's multi-directional radiation requirements. Furthermore, AIP modules are susceptible to electromagnetic interference from metal frames, motherboards, cameras, and other modules, which can reduce antenna performance and cause data transmission delays.

[0005] Summary of the Invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art and to provide a display substrate, a display device and a method for preparing the display substrate that do not affect the display effect and enhance communication reliability.

[0007] In a first aspect, the technical solution adopted to solve the technical problem of the present invention is a display substrate, which includes a base substrate, a plurality of light-emitting devices arranged on the base substrate, and a color filter layer located on the light-emitting surface of the light-emitting device; the color filter layer includes color filters arranged in a one-to-one correspondence with the light-emitting devices, and a black matrix located between adjacent color filters; wherein,

[0008] The display substrate further includes an antenna structure disposed on a side of the color filter layer close to the light-emitting device; the antenna structure includes a plurality of antenna units, and the antenna unit includes a first radiation patch;

[0009] The orthographic projection of the conductive portion of the first radiation patch on the base substrate is located within the orthographic projection of the black matrix on the base substrate.

[0010] In some embodiments, the first radiation patch has a plurality of first openings, and the display substrate further includes a pixel defining layer, which is arranged on the side of the first electrode of the light-emitting device away from the base substrate; the pixel defining layer has a plurality of accommodating portions, and one of the first openings is arranged corresponding to one of the accommodating portions.

[0011] In some embodiments, for the first opening and the receiving portion that are correspondingly provided, an orthographic projection of the first opening on the base substrate covers an orthographic projection of the receiving portion on the base substrate.

[0012] In some embodiments, the corresponding first opening and the receiving portion have the same contour shape of their orthographic projections on the substrate.

[0013] In some embodiments, the antenna unit further includes at least one feeding structure, and the feeding structure is electrically connected to the first radiation patch via a feeding line.

[0014] In some embodiments, the display substrate includes a display area and a non-display area, the feeding line extends from the display area to the non-display area and is electrically connected to the feeding structure.

[0015] In some embodiments, the feed line has a second opening, and one second opening is provided corresponding to one accommodating portion.

[0016] In some embodiments, the antenna unit includes a first feed line and a second feed line, and the first feed line and the second feed line extend in different directions.

[0017] In some embodiments, the antenna unit further comprises at least one second radiating patch, wherein,

[0018] The orthographic projection of the conductive portion of the second radiation patch on the base substrate is covered by the orthographic projection of the black matrix on the base substrate.

[0019] In some embodiments, the second radiation patch has a fourth opening, and one of the fourth openings is disposed corresponding to one of the accommodating portions.

[0020] In some embodiments, the orthographic projection of the second radiation patch on the substrate is located between the orthographic projections of the two first radiation patches corresponding to two adjacent antenna units on the substrate. In the thickness direction of the substrate, the maximum height of the first radiation patch is Y; in the direction parallel to the substrate, the maximum length of the first radiation patch is X, wherein:

[0021] The distance between the center of the second radiation patch and the center of the first radiation patch along the thickness direction of the substrate is Y / 2;

[0022] A distance between a center of the second radiation patch and a center of the first radiation patch along a direction parallel to the base substrate is X / 2.

[0023] In some embodiments, the outline of the orthographic projection of the first radiation patch on the substrate is a first polygon, wherein the first polygon includes a plurality of first sides and a second side connected to two adjacent first sides; the first sides and the second sides are connected in sequence, and the internal angles of the first polygon are all obtuse angles;

[0024] The outline shape of the orthographic projection of the second radiation patch on the substrate is a second polygon, wherein the second polygon includes multiple third sides and a fourth side connected to two adjacent third sides; the third sides and the fourth sides are connected in sequence, and the internal angles of the second polygon are all obtuse angles.

[0025] In some embodiments, the display substrate further includes a sensing layer disposed on a side of the light-emitting device close to the black matrix, and the antenna structure is disposed on a side of the sensing layer close to the black matrix.

[0026] In some embodiments, the display substrate further includes a heat dissipation layer disposed on a side of the base substrate away from the light-emitting device.

[0027] In a second aspect, an embodiment of the present disclosure provides a display device, comprising a display panel, wherein the display panel comprises any one of the display substrates described in the first aspect.

[0028] In some embodiments, the display device further includes a middle frame and a back cover which are located on a side of the display panel away from the display surface and are arranged in sequence.

[0029] In a third aspect, the present disclosure also provides a method for preparing a display substrate, comprising:

[0030] providing a substrate;

[0031] forming a plurality of light emitting devices on the base substrate;

[0032] A color filter layer is formed on the light-emitting side of the light-emitting device; the color filter layer includes color filters arranged in a one-to-one correspondence with the light-emitting devices, and a black matrix is ​​formed between adjacent color filters; wherein the method further includes:

[0033] An antenna structure is formed on a side of the color filter layer close to the light-emitting device; the antenna structure includes a plurality of antenna units, and the antenna unit includes a first radiation patch;

[0034] The orthographic projection of the conductive portion of the first radiation patch on the base substrate is located within the orthographic projection of the black matrix on the base substrate.

[0035] In some embodiments, the first radiating patch has a plurality of first openings, and the method further comprises:

[0036] A pixel defining layer is formed on a side of the first electrode of the light emitting device facing away from the base substrate; the pixel defining layer has a plurality of accommodating portions, and one of the first openings is arranged corresponding to one of the accommodating portions.

[0037] In some embodiments, for the first opening and the receiving portion that are correspondingly provided, an orthographic projection of the first opening on the base substrate covers an orthographic projection of the receiving portion on the base substrate.

[0038] In some embodiments, the method further comprises:

[0039] A sensing layer is formed on a side of the light emitting device close to the black matrix, and the antenna structure is arranged on a side of the sensing layer close to the black matrix. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] FIG1 is a schematic diagram of a film layer of a display substrate provided by an embodiment of the present disclosure;

[0041] 2a-2b are top views of a display substrate provided by an embodiment of the present disclosure;

[0042] FIG3 is a simplified stacking diagram of a display substrate provided by an embodiment of the present disclosure;

[0043] FIG4 is a cross-sectional view of a display layer of a display substrate provided in an embodiment of the present disclosure;

[0044] FIG5 is a schematic structural diagram of an antenna unit provided in an embodiment of the present disclosure;

[0045] FIG6a-FIG6b are comparative graphs of S parameters and gains of different antenna units, respectively;

[0046] 7a-7b are schematic diagrams of two feeder types provided in embodiments of the present disclosure;

[0047] FIG8a is a schematic diagram of a single-polarized antenna structure provided by an embodiment of the present disclosure;

[0048] FIG8b is a schematic diagram of a dual-polarized antenna structure provided by an embodiment of the present disclosure;

[0049] FIG8c is a schematic diagram of another dual-polarized antenna structure provided by an embodiment of the present disclosure;

[0050] FIG9 a is a graph of S-parameter curves corresponding to three antenna unit structures provided in an embodiment of the present disclosure;

[0051] FIG9 b is a graph showing gain curves corresponding to three antenna unit structures provided in an embodiment of the present disclosure;

[0052] 10a-10c are top views of different antenna structures provided by embodiments of the present disclosure;

[0053] Figures 11a to 11c are oblique views corresponding to Figures 10a to 10c respectively;

[0054] FIG11d is a cross-sectional view along the section AA in FIG10c;

[0055] 12 and 13 are schematic diagrams of another display substrate provided by an embodiment of the present disclosure;

[0056] FIG14a and FIG14b are respectively an S-parameter curve diagram and a gain curve diagram corresponding to the antenna structure in FIG12;

[0057] FIG15 is an overall block diagram of a display panel provided by an embodiment of the present disclosure;

[0058] FIG16 is a schematic diagram of a mobile terminal with millimeter wave communication function provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0059] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0060] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0061] With the advancement of screen production technology, OLED screen designs are pursuing a higher screen-to-body ratio and higher integration of electronic components. Under-screen fingerprint and under-screen camera technology (Full Display with Camera, FDC) with display functions allow ambient light to pass through the screen film layer to the bottom layer and be captured by the camera for imaging. This technology requires the film layer material of the OLED device to have a relatively high transmittance.

[0062] The application of color filter on encapsulation (COE) technology in FDC offers significant advantages over polarizers. COE involves applying a color filter to the traditional active-matrix organic light-emitting diode (AMOLED) package. Each pixel is assigned a color filter, separated by a black matrix (BM). This filter solves both reflection and light transmission issues. For example, unwanted light from the outside world is absorbed by the BM. Light that passes through the color filter is either reflected by the corresponding pixel and intercepted by the BM during reflection, or absorbed by other color filter areas. Furthermore, the color filter has a high transmittance for the dominant RGB wavelengths, approximately 70-90%, significantly higher than polarizers.

[0063] On this basis, the embodiment of the present disclosure provides a display substrate that can integrate the antenna structure into the COE part and utilize the light shielding characteristics of the BM to shield the antenna structure.

[0064] Figure 1 is a schematic diagram of the film layers of a display substrate provided by an embodiment of the present disclosure. As shown in Figure 1 , the display substrate includes a base substrate 101, multiple light-emitting devices 1d disposed on the base substrate 101, and a color filter layer 3 located on the light-emitting side of the light-emitting devices 1d. The color filter layer 3 includes color filters 33 arranged one-to-one with the light-emitting devices 1d, and a black matrix 2 located between adjacent color filters 33. The display substrate also includes an antenna structure 1 disposed on the side of the color filter layer 3 near the light-emitting devices 1d. The antenna structure 1 includes multiple antenna units, each of which includes a first radiating patch. The orthographic projection of the conductive portion 13 of the first radiating patch on the base substrate 101 is located within the orthographic projection of the black matrix 2 on the base substrate 101.

[0065] Specifically, the color filter 33 is generally used in an organic light-emitting diode display panel or a liquid crystal display panel to convert incident light into color, thus having the function of converting light. The color filter 33 is provided in a one-to-one correspondence with the light-emitting device 1d. Specifically, the color filter 33 is provided in correspondence with the light-emitting layer 112 of the light-emitting device 3, and the orthographic projection of the color filter 33 on the base substrate 101 can completely cover the light-emitting layer 112, so that the light emitted by the light-emitting layer 112 has a color display effect. Among them, the color filter 33 includes filters of multiple colors so that the light-emitting layer 112 can emit light of different colors. For example, the color filter 33 includes a blue filter, a red filter, and a green filter.

[0066] The black matrix 2 is made of a nearly opaque material with light-shielding properties and is disposed between the color filters 33 to reduce the transmittance of the non-pixel area. Not disposing the black matrix 2 at the location corresponding to the light-emitting device 1d does not affect the light extraction efficiency of the light-emitting device 1d.

[0067] The light-emitting layer 112 of the light-emitting device 1d contains a large amount of metal, which has a strong blocking effect on millimeter waves. Therefore, it can be equivalent to a virtual ground electrode. Therefore, the antenna structure 1 is placed on the side of the light-emitting device 1d close to the black matrix 2. The area between the light-emitting device 1d and the antenna structure 1 can be considered as the antenna's clearance area, which is generally between 20 and 60 microns.

[0068] The antenna unit includes a first radiating patch for radiation, which can generally be made of metal. The larger the area of ​​the conductive metal in the first radiating patch, the better the radiation effect of the corresponding antenna unit. When the entire surface of the first radiating patch is conductive metal, the corresponding antenna unit achieves the best radiation effect. The antenna structure 1 is disposed on the light-emitting surface of the light-emitting device 1d. If the area of ​​the conductive metal in the first radiating patch is too large, overlapping with the orthographic projection of the light-emitting layer 112 on the substrate 101, the mesh line width of the first radiating patch must be very fine, generally less than 2 μm. Only in this way can the overall transmittance of the first radiating patch be above 88% and visually not affect the display. However, this solution is not only difficult to manufacture, but also has relatively low radiation efficiency. The conductive portion 13 of the antenna structure is entirely a metal mesh with a thickness of less than 2 μm. The effective radiation area (i.e., the conductive portion 13 of the antenna structure) is only approximately 5%, and the rest of the antenna structure 1 is blank. This makes it difficult to improve the radiation performance of the antenna structure 1. If the grid line width of the first radiation patch is not made thinner, the light-emitting layer of the light-emitting device 1d will be blocked, affecting the light emission effect of the light-emitting device 1d.

[0069] In order to take into account both the light extraction efficiency of the light-emitting device 1d and the radiation effect of the first radiation patch, the embodiment of the present disclosure sets the first radiation patch on the side of the black matrix 2 close to the light-emitting device 1d. Moreover, the orthographic projection of the conductive portion 13 of the first radiation patch on the base substrate 101 is set to be covered by the orthographic projection of the black matrix 2 on the base substrate 101. That is, the embodiment of the present disclosure sets the antenna structure 1 as a hollow structure, and the black matrix 2 uses its light-shielding properties to shield the conductive portion 13 of the first radiation patch; and the first radiation patch is hollowed in the portion corresponding to the light-emitting portion of the light-emitting device 1d, so that the first radiation patch does not need to be made too narrow or too thin to affect the radiation effect, nor does it affect the light extraction efficiency of the light-emitting device 1d.

[0070] In the disclosed embodiment, a BM shielding the conductive portion 13 of the first radiating patch is employed. The BM completely covers the conductive portion 13 of the antenna structure 1, and its effective area (the area of ​​the conductive portion 13 of the antenna structure) is significantly larger than that of a metal mesh antenna, which is approximately 2 μm. This satisfies the radiation requirements of the first radiating patch without affecting the light extraction efficiency of the light-emitting device 1 d.

[0071] In some embodiments, the first radiation patch has multiple first openings 12, and the display substrate includes not only a base substrate 101, a light-emitting device 1d, a color filter layer 3 and an antenna structure 1, but also a pixel defining layer 113, which is arranged on the side of the first electrode 114a of the light-emitting device 1d away from the base substrate 101; and the pixel defining layer 113 has multiple accommodating portions, and one first opening 12 is arranged corresponding to one accommodating portion.

[0072] Specifically, the pixel defining layer 113 can be made of an organic material, for example, an organic material such as photoresist, and the pixel defining layer 113 has a receiving portion exposing the first electrode 114a; the light-emitting layer 112 of the light-emitting device 1d is located in the receiving portion and is formed on the first electrode 114a, and the light-emitting layer 112 may include a small molecule organic material or a polymer molecule organic material, and may be a fluorescent light-emitting material or a phosphorescent light-emitting material, and may emit red light, green light, blue light, or white light, etc.; and, according to actual needs, in different examples, the light-emitting layer 112 may further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer; the second electrode 115 of the light-emitting device 1d covers the light-emitting layer 112, and the polarity of the second electrode 115 is opposite to that of the first electrode 114a; this second electrode 115 may be a cathode, and this cathode may be made of a metal material such as lithium (Li), aluminum (Al), magnesium (Mg), or silver (Ag).

[0073] The first opening 12 of the first radiation patch is arranged corresponding to the accommodation portion, so the first radiation patch can reserve a light-emitting portion of the light-emitting layer 112, which will not affect the light-emitting effect of the light-emitting device 1d.

[0074] In some embodiments, the orthographic projections of the corresponding first opening 12 and the corresponding receiving portion on the base substrate 101 are identical.

[0075] In some embodiments, for the first opening 12 and the receiving portion that are correspondingly provided, the centers of the contours of their orthographic projections on the base substrate 101 coincide with each other.

[0076] Specifically, for the light-emitting layer 112 of the light-emitting device 1d formed within the housing, the structures corresponding to the light-emitting layers 112 of different color sub-pixels are different. For example, the shapes and sizes of the orthographic projections of the red, green, and blue sub-pixels on the substrate 101 are all different. When the first opening 12 and the housing have the same orthographic projections on the substrate 101 and their centers coincide, the area of ​​the first opening is smaller than when the orthographic projections of the first opening 12 and the housing have different orthographic projections on the substrate 101. This means that the conductive portion 13 of the first radiating patch has a larger area, and further, the radiation performance of the first radiating patch is better.

[0077] In the embodiment of the present disclosure, the contours of the orthographic projection of the first opening 12 and the accommodating portion on the base substrate 101 are set to be the same, and the centers of the two coincide. This can ensure that the first opening 12 of the first radiation patch can completely expose the light-emitting layer 11 in the corresponding accommodating portion while the first opening 12 is as small as possible, thereby ensuring the light-emitting effect of the light-emitting layer 112 and improving the radiation performance of the first radiation patch.

[0078] In some embodiments, for the first opening 12 and the receiving portion that are correspondingly arranged, the orthographic projection of the first opening 12 on the base substrate 101 covers the orthographic projection of the receiving portion on the base substrate 101 .

[0079] Specifically, the light-emitting layer 112 of the light-emitting device 1d is formed in the accommodation portion of the pixel defining layer 113. In the embodiment of the present disclosure, the orthographic projection of the first opening 12 on the base substrate 101 is set to completely cover the orthographic projection of the accommodation portion on the base substrate 101, thereby ensuring that the first opening 12 of the first radiation patch can completely expose the light-emitting layer 11 in the corresponding accommodation portion, thereby ensuring the light-emitting effect of the light-emitting layer 112.

[0080] Figures 2a and 2b are top views of a display substrate provided in an embodiment of the present disclosure. As shown in Figures 2a and 2b, in order to more clearly show the relationship between the black matrix 2, the antenna structure 1 and the display sub-pixels in the light-emitting layer 112, the top view only shows the light-emitting layer 112 and the antenna structure 1. Figure 2a is a schematic diagram of the relationship between the black matrix 2, the antenna structure 1 and the display sub-pixels when the display sub-pixels are arranged in 2in1; Figure 2b is a schematic diagram of the relationship between the black matrix 2, the antenna structure 1 and the display sub-pixels when the display sub-pixels are arranged in diamond. It is understandable that, of course, the display sub-pixels can also be other pixel arrangements, such as PenTile pixel arrangement, Delta pixel arrangement, pearl pixel arrangement, etc. It is understandable that the arrangement of the first opening in the first radiation patch is set according to the arrangement of the display sub-pixels.

[0081] The embodiment of the present disclosure is described by taking an example where the light emitting layer 112 includes a red sub-pixel d1 , a green sub-pixel d2 , and a blue sub-pixel d3 .

[0082] As can be seen from Figures 2a and 2b, the outlines and sizes of the positive projections of sub-pixels of different colors on the base substrate 101 are different. The first opening 12 of the antenna structure 1 (not marked in Figures 2a and 2b) completely exposes the display sub-pixels. The conductive portion 13 of the antenna structure 1 is only set between the display sub-pixels, and in the top view, the black matrix 2 completely covers the conductive portion 13 of the antenna structure 1. This setting of the antenna structure 1, on the one hand, enables the conductive portion 13 of the antenna structure 1 to meet the radiation requirements of the antenna structure 1, and on the other hand, it does not affect the light-emitting effect of the light-emitting layer 112.

[0083] In some embodiments, an image formed by the orthographic projections of two adjacent black matrices 2 on the base substrate 101 covers the orthographic projections of the corresponding light-emitting layer 112 on the base substrate 101 .

[0084] Specifically, within a unit period (or within a specified area), the area of ​​the pixels in the light-emitting layer 112 is fixed, generally accounting for approximately 13% of the unit period. Taking into account the light emission effect, the hollow portion between two adjacent black matrices 2 needs to be larger than the area of ​​the pixel. Let scale1 be the scale of the area of ​​the hollow portion between the orthographic projections of two adjacent black matrices 2 on the base substrate 101 compared to the area of ​​the orthographic projection of the corresponding pixel on the base substrate 101. In some embodiments, scale1 is generally between 1.1 and 1.8.

[0085] Specifically, the hollow portion between two adjacent black matrices 2 needs to be larger than the area of ​​the corresponding pixels, so that the black matrix 2 does not affect the light extraction effect of the light-emitting layer 112. In some embodiments, the area relationship between the two is mainly related to the distance between the black matrix 2 and the light-emitting layer 112. If the black matrix 2 and the light-emitting layer 112 are relatively close (for example, within 100um), the hollow portion between the two adjacent black matrices 2 can be made smaller, and the scaling ratio scale1 is about 1.1-1.2; if the black matrix 2 and the light-emitting layer 112 are relatively far apart (for example, 300um-500um, or even farther), the hollow portion between the two adjacent black matrices 2 needs to be made larger. In this case, the scaling ratio scale1 is generally set to about 1.6-1.8, and generally does not exceed 2, so as to ensure the light extraction effect as much as possible.

[0086] Let Scale2 be the scale of the area of ​​the first opening 12 on the substrate 101 relative to the area of ​​the corresponding pixel on the substrate 101. In some embodiments, Scale2 is greater than Scale1. This design ensures that the first opening 12 fully exposes the corresponding light-emitting layer 112 without affecting the light emission effect of the light-emitting layer 112. In some embodiments, Scale2 is 0.2-0.3 greater than Scale1.

[0087] Specifically, considering actual processing errors and the effects of scattering, scale2 needs to be as large as possible compared to scale1 to prevent the first radiating patch layer of antenna structure 1 from affecting light output. This ensures both the light output of light-emitting layer 112 and sufficient conductive portions 13 of the antenna structure for radiation. Of course, the relative relationship between scale2 and scale1 may vary slightly depending on the pixel pattern.

[0088] Table 1 shows the metal area ratio under different combinations, where metal refers to the conductive part in the first radiation patch, which can be copper CU, aluminum AL or other metal materials; the metal area ratio refers to the area ratio of the conductive part 13 of the first radiation patch per unit period area.

[0089] Table 1: Metal area ratio under different combinations

[0090] As shown in Table 1, the unit period area is 0.7233, and the pixel area is 0.0959. The metal area (i.e., the area of ​​the conductive portion of the first radiating patch) varies for different scales 2 and 1. For example, in Solution 1, the smallest scaling ratio is used, with scales 1 and 2 being relatively small. This means that the hollowed-out area of ​​the BM and the area of ​​the first opening are close to the pixel area. In this case, the metal area (i.e., the area of ​​the conductive portion of the first radiating patch) accounts for the largest proportion, approximately 69%. In this case, the radiation performance of antenna structure 1 is improved, but this will affect the light extraction efficiency of light-emitting layer 112. Solution 4 uses a larger scaling ratio, with scales 1 and 2 being relatively large. This will not significantly affect the light extraction efficiency of light-emitting layer 112, but the corresponding metal area in the antenna structure is significantly reduced to approximately 35%. Consequently, the radiation performance of antenna structure 1 is relatively poor. However, even in Solution 4, the radiation performance of antenna structure 1 is significantly better than that of the grid antenna structure in the prior art by 5%.

[0091] In some embodiments, the display substrate includes not only a base substrate 101, a plurality of light-emitting devices 1d, a pixel defining layer 113, and an antenna structure 1, but also includes an encapsulation layer 118 disposed on the side of the light-emitting device 1d facing away from the base substrate 101. Each light-emitting device 1d includes a pixel driving circuit and an organic light-emitting diode (OLED); the pixel driving circuit is composed of a thin-film transistor (TFT) and a storage capacitor and other electrical components. FIG1 illustrates only the thin-film transistor electrically connected to the organic light-emitting diode (OLED). The film layer structure of the remaining thin-film transistors is the same or substantially the same as that of the thin-film transistor, so the following description will only take the film layer configuration of one thin-film transistor as an example. Referring to FIG1 , the thin-film transistor may be a top-gate type, and may include an active layer 104, a first gate insulating layer 105, a gate electrode 106, a second gate insulating layer 108, an interlayer dielectric layer 103, a source electrode 110, and a drain electrode 111. Specifically, the active layer 104 can be formed on the buffer layer 102, the first gate insulating layer 105 covers the buffer layer 102 and the active layer 104, the gate 106 is formed on the side of the first gate insulating layer 105 facing away from the active layer 104, the second gate insulating layer 108 covers the gate 106 and the first gate insulating layer 105, the interlayer dielectric layer 103 covers the second gate insulating layer 108, and the source 110 and drain 111 are formed on the side of the interlayer dielectric layer 103 facing away from the substrate and are respectively located on opposite sides of the gate 106. The source 110 and drain 111 can respectively contact the opposite sides of the active layer 104 through vias (e.g., metal vias). It should be understood that this thin film transistor can also be a bottom-gate type. A planarization layer 116 may be formed between the thin film transistor and the organic electroluminescent diode. The planarization layer 116 may be a single-layer structure or a multi-layer structure. The planarization layer 116 is typically formed of organic materials, such as photoresist, acrylic polymers, silicon polymers, and the like. As shown in FIG1 , the planarization layer 116 is located on the side of the thin film transistor's source 110 and drain 111 facing away from the interlayer dielectric layer.The first electrode 112 of the organic electroluminescent diode OLED can be electrically connected to the drain electrode 111 through a metal via. The first electrode 114a can be an anode, and the anode can be made of materials such as ITO (indium tin oxide), indium zinc oxide (IZO), and zinc oxide (ZnO). The pixel defining layer 113 can cover the planarization layer 116. The pixel defining layer 113 can be made of an organic material, such as an organic material such as a photoresist, and the pixel defining layer 113 has a receiving portion that exposes the first electrode 114a. The light-emitting layer 112 of the organic electroluminescent diode OLED is located in the receiving portion and is formed on the first electrode 114a. The light-emitting layer 112 can include a small molecule organic material or a polymer molecule organic material, and can be a fluorescent light-emitting material or a phosphorescent material. The luminescent material can emit red, green, blue, or white light, etc.; and, depending on actual needs, in different examples, the luminescent layer 112 can further include functional layers such as an electron injection layer, an electron transport layer, a hole injection layer, and a hole transport layer; the second electrode 115 of the organic electroluminescent diode covers the luminescent layer 112, and the polarity of the second electrode 115 is opposite to that of the first electrode 114a; this second electrode 115 can be a cathode, and this cathode can be made of a metal material such as lithium (Li), aluminum (Al), magnesium (Mg), or silver (Ag). The encapsulation layer 118 is located on the side of the organic electroluminescent diode away from the thin film transistor, and the encapsulation layer 118 can include a first inorganic encapsulation thin film layer 118a, an organic encapsulation thin film layer 118b, and a second inorganic encapsulation thin film layer 118c stacked in sequence. The first and second inorganic encapsulation film layers 118a, 118c are used to prevent water and oxygen from entering the light-emitting layer 114a. They can be made of inorganic materials such as silicon nitride and silicon oxide. The organic encapsulation film layer 118b is used to achieve a planarization effect to facilitate the formation of the second inorganic encapsulation film layer 118c. This organic encapsulation film layer 118b can be made of materials such as acrylic polymers and silicon polymers.

[0092] In some embodiments, the display substrate further includes a sensing layer 4 , which is disposed on a side of the light-emitting device 1 d close to the black matrix 2 , and the antenna structure 1 is disposed on a side of the sensing layer 4 close to the black matrix 2 .

[0093] Specifically, the sensing layer 4 includes a sensing effective area and a sensing peripheral area, wherein the sensing effective area is mainly a touch effective area with coupling capacitors, and the sensing peripheral area is a corresponding control circuit.

[0094] In some embodiments, the sensing layer 4 includes a first buffer layer, a first inorganic layer, and a second inorganic layer, sequentially disposed in a direction away from the substrate 101. A first metal layer is disposed on a side of the first buffer layer proximal to the first inorganic layer, and a second metal layer is disposed on a side of the first inorganic layer proximal to the second inorganic layer. The first metal layer is generally disposed only in the sensing peripheral region of the sensing layer 4 for routing, etc., while the second metal layer can generally be disposed in any region of the sensing layer 4.

[0095] In some embodiments, the display substrate further includes a heat dissipation layer 5 , which is disposed on a side of the base substrate 101 away from the light emitting device 1 d .

[0096] Specifically, in some embodiments, the heat dissipation layer 5 includes a third metal layer, a super clean foam layer (SCF), and a buffer layer (BF) sequentially disposed in a direction close to the base substrate 101 .

[0097] Specifically, SCF, also known as Cushion Tape, is a combination of various functional tapes and is used behind the OLED screen to provide light blocking, cushioning, heat dissipation, and shielding. BF is used behind the OLED screen to provide bonding and cushioning.

[0098] In some embodiments, the display substrate is further provided with a cover layer 6 in the direction of the color filter layer 3 away from the base substrate 101. The cover layer 6 mainly plays a protective role.

[0099] FIG3 is a simplified stacking diagram of a display substrate provided by an embodiment of the present disclosure.

[0100] In some embodiments, as shown in FIG3 , the base substrate 101, thin film transistor, planarization layer 116, pixel defining layer 113, light emitting device 1d and encapsulation layer 118 in the embodiment of the present disclosure may constitute the display layer 100 of the display substrate in the embodiment of the present disclosure. The display layer 100 may be divided into a display area 200 and a non-display area 300, wherein the display area 200 mainly includes sub-pixels of various colors, such as red sub-pixels, green sub-pixels, blue sub-pixels, etc., and sub-pixels of various colors with different intensities can form a variety of colors; the non-display area 300 is mainly the row drive (GOA) wiring of the display substrate, including the control circuits of various sub-pixels. The antenna structure 1 is mainly arranged on the side of the sensing layer 4 close to the black matrix 2.

[0101] The following embodiments will specifically illustrate the antenna structure 1 mentioned in the present disclosure. Figure 4 is a cross-sectional view of a display layer of a display substrate provided in an embodiment of the present disclosure. Figure 5 is a schematic structural diagram of an antenna unit provided in an embodiment of the present disclosure.

[0102] In some embodiments, the antenna unit further includes at least one feed line 250 , and the feed line 250 is electrically connected to the first radiation patch 210 .

[0103] Specifically, as shown in FIG4 , the antenna unit is arranged at the edge of the display area 200, and part of the structure of the antenna unit can be extended to the display area 200. Referring to the cross-sectional view of FIG4 , the first radiation patch 210 and part of the feed line of the antenna unit are arranged at the edge of the display area 200, and part of the feed line of the antenna unit is arranged in the non-display area 300 for leading out the signal. In addition, the light-emitting layer 112 of the display area 200 has a lot of metal, which has a strong blocking effect on millimeter waves and can be equivalent to a virtual ground electrode, which can block the transmission of electromagnetic waves. In some embodiments, the clearance area of ​​the antenna structure 1 can be the sum of the thickness of the encapsulation layer 118 and the touch layer 4, which is generally between 20um and 60um.

[0104] In some embodiments, the feed line 250 has a second opening 220 , and one second opening 220 is correspondingly provided to one receiving portion.

[0105] Specifically, as shown in FIG5 , the structure of the antenna unit extends from the display area 200 to the non-display area 300. The first radiation patch 210 of the antenna unit and the first portion of the feed line 230 of the feed line 250 have a second opening 220 (i.e., a hollow pattern as shown in FIG5 ) to expose the corresponding light-emitting layer 112 to prevent affecting the light-emitting effect of the light-emitting layer 11; and the second portion of the feed line 240 of the feed line 250 located in the non-display area can use a physical radiation patch structure to lead out the signal. The second portion of the feed line 240 of the feed line 250 located in the non-display area is made into a physical structure, which can increase the radiation performance of the antenna unit without affecting the light-emitting effect of the light-emitting layer 112.

[0106] Figures 6a and 6b are comparative graphs of the S parameters and gains of different antenna units, respectively. Figure 6a is a comparative graph of the S parameters of different antenna units, wherein m1 is the S parameter curve of the antenna unit provided in the embodiment of the present disclosure, wherein the first radiating patch 210 of the antenna unit has a first opening, the feed line 250 is located in the first portion of the display area, and the feed line 230 has a second opening; m2 is the S parameter curve of an existing antenna unit composed of a solid structure, wherein both the radiating patch and the feed line of the existing antenna unit are solid structures. Figure 6b is a comparative graph of the gains of different antenna units, wherein n1 is the gain curve of the antenna unit provided in the embodiment of the present disclosure, wherein the first radiating patch 210 of the antenna unit has a first opening, the feed line 250 is located in the first portion of the display area, and the feed line 230 has a second opening; m2 is the gain curve of an existing antenna unit composed of a solid structure, wherein both the radiating patch and the feed line of the existing antenna unit are solid structures.

[0107] Among them, the S parameter of the antenna unit refers to the scattering parameter of the antenna, which is one of the important indicators of antenna performance. Referring to Figure 6a, the horizontal axis is the resonant frequency of the antenna unit, and the vertical axis is the S parameter. As can be seen from Figure 6a, under the same stacking, the resonant frequency of m1 is offset compared to the resonant frequency of m2, and the offset is about 500MHz. Referring to Figure 6b, the horizontal axis is the resonant frequency of the antenna unit, and the vertical axis is the gain. In terms of gain, compared with n2, the gain value of n1 will decrease, and the maximum gain will drop from 3.39dBi to 2.95dBi, a decrease of 0.44dBi. However, on the whole, the antenna unit provided in the embodiment of the present application is not much different from the existing antenna unit. Based on the performance of the existing antenna unit, the performance of the antenna unit provided in the embodiment of the present disclosure can be roughly deduced. As mentioned above, under this stacked structure, the thickness clearance area of ​​the antenna structure is about 20-60um, and the effective cross-section is too low, resulting in a decrease in radiation performance. Therefore, this antenna unit is suitable for narrowband antenna structure. The bandwidth is about 10% when the S parameter is -6dB, and the bandwidth is only about 2% when it is -10dB.

[0108] In some embodiments, one first radiation patch 210 may be connected to one feed line 250 to achieve single polarization.

[0109] Specifically, Figure 8a is a schematic diagram of a single-polarized antenna structure provided by an embodiment of the present disclosure. As shown in Figure 8a, the antenna structure includes multiple antenna units, each of which includes a first radiating patch 210 and a feeder line 250, and each first radiating patch 210 is electrically connected to a feeder line 250. Single-polarized antenna structures are generally suitable for scenarios where signals are received at a specific location, that is, scenarios where the signal transmitter and receiver are generally fixed.

[0110] In some embodiments, the antenna unit includes a first feed line 260 and a second feed line 270 , and the first feed line 260 and the second feed line 270 have different feeding directions.

[0111] Specifically, Figure 8b is a schematic diagram of a dual-polarized antenna structure provided by an embodiment of the present disclosure. As shown in Figure 8b, the first radiating patch 210 has a square outline. The antenna structure includes multiple antenna units, each of which includes a first radiating patch 210 and two feed lines 250: a first feed line 260 and a second feed line 270. Both the first feed line 260 and the second feed line 270 are electrically connected to the same first radiating patch 210. Dual-polarized antenna structures are generally suitable for mobile terminal scenarios.

[0112] Of course, one first radiation patch 210 may also be connected to multiple feed lines 250 to achieve multi-polarization, which is not limited in the present disclosure.

[0113] In some embodiments, the feed line 250 may be a non-50 ohm feed line or a 50 ohm feed line.

[0114] Specifically, when the cross-section of the antenna unit provided in the embodiment of the present disclosure is too low, its 50 ohm transmission line is difficult to match, considering the performance of the antenna unit. On the one hand, a wider non-50 ohm feeder can generally be used. However, the S parameter in this case will be poor, affecting the radiation efficiency. Therefore, in this case, it is necessary to perform impedance matching in the subsequent transmission link to match it to 50 ohms in order to achieve a better transmission line. On the other hand, the feeder 250 directly uses a 50 ohm feeder. At this time, the feeder 250 will be relatively narrow, and the feeder 250 will not affect the radiation patch, so the resonance of the S parameter will be better.

[0115] In some embodiments, the feed line 250 is an arc-shaped feed line.

[0116] Specifically, Figures 7a and 7b are schematic diagrams of two feeder types provided in embodiments of the present disclosure. As shown in Figures 7a and 7b, feeder 250 can be a zigzag feeder or a circular arc feeder. Of course, other feeder types can also be used, and the embodiments of the present disclosure do not limit this. When feeder 250 uses a circular arc feeder, the electromagnetic transmission effect will be relatively better, and the current loss will be smaller. At this time, the antenna gain will be increased by about 0.1dBi relative to the use of a zigzag feeder, and the feeders will be more compact, which is conducive to the layout of the array.

[0117] In some embodiments, the orthographic projection of the first radiating patch 210 on the base substrate 101 may be a square or other shapes. For example, Figures 7a-7b and 8a-8b above are all described using the example of the orthographic projection of the first radiating patch 210 on the base substrate 101 being a square, and the description will not be repeated here.

[0118] In some embodiments, the first radiation patch 210 is not limited to a full-surface structure. Grooves may be distributed on the first radiation patch 210 , or branches may be loaded, such as T-shaped branches or other branches, to enhance the radiation performance of the first radiation patch 210 .

[0119] In some embodiments, the outline shape of the positive projection of the first radiation patch 210 on the base substrate 101 is a first polygon, wherein the first polygon includes multiple first edges and second edges connected to two adjacent first edges; the first edges and the second edges are connected in sequence, and the internal angles of the first polygon are all obtuse angles.

[0120] Specifically, the outline of the first radiating patch 210 can be a regular octagon or a roughly regular octagon. It should be noted that a roughly regular octagon means that one or more of the sides of the original octagon are bent, but the main structure of the shape remains an octagon. The octagon or roughly octagon is adopted because it is more similar to a rectangular microstrip antenna. When forming an antenna array, it can make the structure more compact and reduce the spacing between antennas. Of course, the outline of the first radiating patch 210 can also be other shapes, such as square, rectangle, regular hexagon, etc.

[0121] Figure 8c is a schematic diagram of another dual-polarized antenna structure provided by an embodiment of the present disclosure. As shown in Figure 8c, the outline shape of the first radiation patch 210 is a regular octagon. Figure 9a is an S-parameter curve diagram corresponding to the three antenna unit structures provided by an embodiment of the present disclosure, wherein p1 is an S-parameter curve diagram of the antenna unit in which the outline shape of the first radiation patch 210 on the substrate 101 is a square, and the feed line 250 is a zigzag feeder. p2 is an S-parameter curve diagram of the antenna unit in which the outline shape of the first radiation patch 210 on the substrate 101 is a square, and the feed line 250 is a circular arc feeder. P3 is an S-parameter curve diagram of the antenna unit in which the outline shape of the first radiation patch 210 on the substrate 101 is a regular octagon, and the feed line 250 is a zigzag feeder. Figure 9b shows the gain curves corresponding to the three antenna unit structures provided in the embodiments of the present disclosure. q1 is the gain curve for an antenna unit in which the first radiating patch 210 on the substrate 101 has a square outline and the feed line 250 is a zigzag feeder. q2 is the gain curve for an antenna unit in which the first radiating patch 210 on the substrate 101 has a square outline and the feed line 250 is a circular feeder. q3 is the gain curve for an antenna unit in which the first radiating patch 210 on the substrate 101 has a regular octagon outline and the feed line 250 is a zigzag feeder.

[0122] As can be seen from Figures 9a-9b, whether in terms of the resonant frequency of the S parameters or the gain, the octagonal structure is better than the square structure. This is mainly because at the same resonant frequency, the effective area of ​​the octagonal unit (the area of ​​the conductive part of the first radiation patch) is larger than the effective area of ​​the square structure, and the increase in the radiation aperture is conducive to improving the gain. The maximum gain of the array with the first radiation patch 210 having an octagonal outline is 9.1dBi, and the maximum gain of the two forms with the first radiation patch 210 having a square outline is not much different, at around 8.5dBi. Although the results of the two structures with the first radiation patch 210 having a square outline are basically the same, the arc-shaped feeder structure is easy to adjust and can be laid out more compactly, so that the first radiation patches 210 are closer to the edge of the display substrate, which is conducive to reducing the length of the feeder and is suitable for use in multi-unit arrays.

[0123] In some embodiments, the antenna unit includes not only the first radiation patch 210 and the feed line 250 , but also at least one feed line structure. The feed line 250 extends from the display area 200 to the non-display area 300 and is electrically connected to the feed structure.

[0124] Specifically, the feed structure is disposed in the non-display area 300 of the display substrate. The feed structure provides a feed source for the first radiating patch 210. In some embodiments, the feed structure may be a radio frequency transceiver module. The radio frequency transceiver module includes a single-channel radio frequency transceiver module and a multi-channel radio frequency transceiver module.

[0125] Figures 10a-10c are top views of different antenna structures provided in embodiments of the present disclosure. Figure 10a is a schematic diagram of a single-polarized antenna structure connected to a multi-channel RF transceiver module; Figure 10b is a schematic diagram of a single-polarized antenna structure connected to a single-channel RF transceiver module; and Figure 10c is a schematic diagram of a dual-polarized antenna structure connected to a single-channel RF transceiver module. Figures 11a-11c are oblique views corresponding to Figures 10a-10c. Figure 11d is a cross-sectional view along section AA in Figure 10c.

[0126] A binding area is reserved in the antenna structure, and the signal needs to be led from the feed line to the feed structure through at least one dielectric layer to carry the signal line with power splitting or the signal line without power splitting. If more layers of signal lines are required, the number of dielectric layers will also increase. Referring to Figures 10a-10c and Figures 11a-11d, it can be seen that depending on the antenna structure (including single polarization or dual polarization) and the function of the RF transceiver module, there are several ways to connect the signal led from the feed line of the antenna unit to the RF transceiver module through the signal line.

[0127] Single-polarization antenna structures can be connected to either single-channel or multi-channel RF transceiver modules. Single-polarization antenna structures require only one dielectric layer to carry a single signal line, eliminating the need for cross-layer routing. Single-channel RF transceiver modules are relatively low-cost, but they only enable normal radiation and cannot achieve beam scanning. Multi-channel RF transceiver modules have numerous transceiver links, each connected to an antenna unit. Each antenna unit can control amplitude and phase through the link, enabling beam scanning.

[0128] When a dual-polarized antenna structure uses a multi-channel RF transceiver module, it is similar to a single-polarized antenna structure, except that the number of links is increased. However, for a single-channel RF transceiver module, the dual-polarized antenna structure will have signal line crossovers, necessitating cross-layer routing. As shown in Figures 10c, 11c, and 11d, the Sig1 signal line can be implemented on the same dielectric layer, while the Sig2 signal line needs to be connected across layers. This means it first passes through vias to the bottom layer, avoiding the Sig1 routing, and then is aggregated to a binding or connector port, leading out through vias to the same layer as Sig1 for connection to the RF module. Of course, the final aggregation via can be omitted, allowing Sig1 and Sig2 to transmit on different dielectric layers, with cross-layer electrical connection made at the RF transceiver module.

[0129] In some embodiments, the antenna unit not only includes a first radiation patch 210, a feed line 250 and a feeding structure, but also includes at least one second radiation patch 290, which is electrically connected to the first radiation patch 210 through coupling, wherein the conductive part of the second radiation patch 290 is covered by the positive projection of the black matrix 2 on the base substrate 101.

[0130] Specifically, Figures 12 and 13 are schematic diagrams of another display substrate provided by an embodiment of the present disclosure. As shown in Figures 12 and 13, compared to antenna units with solid radiating structures, the first radiating patch 210 of the antenna unit provided by the embodiment of the present disclosure has a first opening. To improve the radiation performance of the antenna unit, a second radiating patch 290 is added. The second radiating patch 290 is electrically connected to the first radiating patch 210 through coupling, acting as a parasitic structure of the first radiating patch 210 to enhance the radiation performance of the antenna unit. The dimensions of the second radiating patch 290 can be the same as or different from those of the first radiating patch 210. The second radiating patch 290 is disposed around the first radiating patch 210, and its specific location can be flexibly adjusted as needed. The number of second radiating patches 290 can also be flexibly adjusted as needed. Generally, one to two second radiating patches 290 are configured for each first radiating patch 210 for optimal performance. However, too many second radiating patches 290 will occupy a certain amount of space, making the antenna structure excessively large and inconvenient to design.

[0131] In some embodiments, the second radiation patch 290 has a fourth opening, and one fourth opening is provided corresponding to one receiving portion.

[0132] Specifically, the second radiating patch 290 is disposed in the display area of ​​the display substrate. To ensure that the light-emitting effect of the light-emitting layer 112 is not affected, the fourth opening of the second radiating patch 290 must expose the corresponding light-emitting layer. For details, refer to the description of the first opening of the first radiating patch 210 above and will not be repeated here.

[0133] In some embodiments, the orthographic projection of the second radiation patch 290 on the substrate 101 is located between the orthographic projections of the two first radiation patches 210 corresponding to the two adjacent antenna units on the substrate 101, and the maximum height of the first radiation patch 210 along the thickness direction of the substrate 101 is Y; in the direction parallel to the substrate 101, the maximum length of the first radiation patch 210 is X, wherein the distance between the center of the second radiation patch 290 and the center of the first radiation patch 210 along the thickness direction of the substrate 101 is Y / 2; the distance between the center of the second radiation patch 290 and the center of the first radiation patch 210 along the direction parallel to the substrate 101 is X / 2.

[0134] Specifically, the lateral size of the orthographic projection of the second radiating patch 290 on the substrate 101 is preferably half that of the first radiating patch 210. In this way, the middle second radiating patch 290 can be shared by adjacent first radiating patches 210. This ensures the radiation effect of the antenna unit while providing as few second radiating patches 290 as possible.

[0135] FIG14a and FIG14b are respectively an S-parameter curve diagram and a gain curve diagram corresponding to the antenna structure in FIG12.

[0136] Referring to Figures 14a and 14b , combined with the S-parameter curve p2 in Figure 9a and the gain curve q2 in Figure 9b , it can be seen that compared to the antenna structure without second radiating patch 290, the S-parameter resonance is improved, with a gain of 3.9 dBi. While the gain of the antenna structure without second radiating patch 290 is 3.5 dBi, the gain of the antenna structure with second radiating patch 290 is increased by approximately 0.4 dBi.

[0137] In some embodiments, the orthographic projection of the second radiation patch 290 on the base substrate 101 may be a square or other shapes.

[0138] In some embodiments, the second radiation patch 290 is not limited to a full-surface structure. Grooves may be distributed on the second radiation patch 290 , or branches may be loaded, such as T-shaped branches or other branches, to enhance the radiation performance of the second radiation patch 290 .

[0139] In some embodiments, the orthographic projection of the second radiating patch 290 on the substrate 101 is a second polygon, wherein the second polygon includes a plurality of third sides and a fourth side connected to two adjacent third sides; the third sides and the fourth sides are sequentially connected, and the interior angles of the second polygon are all obtuse angles. The specific details are similar to those of the first radiating patch 210 and are not repeated here.

[0140] Based on the same invention, an embodiment of the present disclosure further provides a display panel, which includes an embodiment of any one of the display substrates in the above embodiments.

[0141] Figure 15 is an overall block diagram of a display panel provided by an embodiment of the present disclosure. As shown in Figure 15, the display panel is mainly divided into three layers, a display layer 100, a sensor layer 4, and a cover layer 400. As described above, the display layer 100 is divided into a display area 200 and a non-display area 300. The display area 200 is mainly composed of various red, green, and blue sub-pixels. Different intensities of red, green, and blue can form a variety of colors. The non-display area 300 is mainly for display substrate row drive (GOA) wiring, which is the control circuit of various pixels. Similarly, the sensor layer 4 includes a sensing effective area 41 and a sensing peripheral area 42. The sensing effective area 41 is mainly a touch effective area with coupling capacitors, and the sensing peripheral area 42 is the corresponding control circuit. The cover 400 is divided into a light-transmitting area 410 and a non-light-transmitting area (ink) 420. The ink in the non-light-transmitting area 420 is used to block the boundary between the display area 200 and the non-display area 300.

[0142] Based on the same invention, an embodiment of the present disclosure further provides a display device, which includes a back cover, a middle frame, and an embodiment of any display panel in the above embodiments, which are stacked in sequence.

[0143] Specifically, the display device is taken as an example of a mobile terminal. Figure 16 is a schematic diagram of a mobile terminal with millimeter wave communication function provided by an embodiment of the present disclosure. As shown in Figure 16, the mobile terminal generally includes a front display panel, a middle frame and a back cover forming the terminal. Among them, the front display panel is the main display area, the back cover is mainly used to protect the battery and internal components, the middle frame is used to connect the front display panel and the back cover of the back layer, the middle frame can be combined with the back cover, and various electronic components are arranged between the front display panel and the back cover of the back layer. The front display panel is located on the front side of the mobile terminal and is mainly used to output display information. The display screen is mainly divided into a display area 200 and a non-display area 300. A microphone 1006, an earphone jack 1004, a charging port 1005, a SIM card slot 1003, a power button 1002, a volume button 1001, etc. are distributed on the middle frame (back cover). The display area 200 also includes a camera 1000, etc. The antenna structure 1 is located at the edge of the display area 200, the first radiating patch 210 and / or the second radiating patch 290 of the antenna structure are partially located within the display area 200, and the feed line and feeding structure are located within the non-display area 300. The specific location of the antenna structure depends on the module space on the back of the mobile terminal and can be located on the upper and lower sides, or on the left and right sides of the mobile terminal, which is not limited in this disclosure.

[0144] Based on the same invention, the present disclosure also provides a method for preparing a display substrate, which specifically includes:

[0145] S1. Forming a heat dissipation layer 5. Specifically, the heat dissipation layer 5 includes a third metal layer, a super clean foam (SCF) layer, and a buffer foam (BF) layer, which are sequentially formed in a direction close to the base substrate 101.

[0146] S2. Provide a base substrate 101 on the heat dissipation layer 5 .

[0147] S3. Sequentially forming a thin film transistor, a planarization layer 116 and a light emitting device 1d on the base substrate 101. Specifically, the first electrode 114a, the light emitting layer 112 and the second electrode 115 of the light emitting device 1d are sequentially formed on the base substrate 101.

[0148] S4, sequentially forming a pixel defining layer 103, an encapsulation layer 118 and a sensing layer 4 on the light emitting device 1d. Specifically, the pixel defining layer 103 has a plurality of accommodation portions.

[0149] S5 , sequentially forming the antenna structure 1 , the black matrix layer 2 and the color filter layer 3 on the sensing layer 4 .

[0150] Specifically, the antenna structure 1 includes multiple antenna units, each including a first radiation patch 210 ; the orthographic projection of the conductive portion 13 of the first radiation patch 210 on the base substrate 101 is covered by the orthographic projection of the black matrix 2 on the base substrate 101 .

[0151] In some embodiments, the first radiation patch 210 has a plurality of first openings, and one first opening is correspondingly disposed to one receiving portion.

[0152] In some embodiments, for the first opening and the receiving portion that are correspondingly provided, the orthographic projection of the first opening on the base substrate 101 covers the orthographic projection of the receiving portion on the base substrate 101 .

[0153] In some embodiments, for the correspondingly arranged first opening and the receiving portion, the contour shapes of their orthographic projections on the base substrate 101 are the same, and their centers coincide with each other.

[0154] For other details of the method for preparing the display substrate, please refer to the above-mentioned embodiment of the display substrate, which will not be repeated here.

[0155] The method for preparing a display substrate provided in an embodiment of the present disclosure sets the antenna structure on the side of the black matrix 2 layer close to the light-emitting device 1d, and the black matrix 2 completely covers the conductive parts of the first radiation patch 210 and / or the second radiation patch 290 in the antenna structure 1, without affecting the light-emitting effect to the light-emitting layer 112, while also meeting the radiation performance of the antenna structure 1.

[0156] It will be understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will appreciate that various modifications and improvements can be made without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A display substrate, which includes a substrate, a plurality of light-emitting devices disposed on the substrate, and a color filter layer located on the light-emitting side of the light-emitting devices; the color filter layer includes color filter films provided in one-to-one correspondence with the light-emitting devices, and a black matrix located between the adjacent color filter films. Wherein, the display substrate further includes an antenna structure disposed on the side of the color filter layer close to the light-emitting devices; the antenna structure includes a plurality of antenna units, and each antenna unit includes a first radiation patch. The orthographic projection of the conductive portion of the first radiation patch on the substrate is located within the orthographic projection of the black matrix on the substrate.

2. The display substrate according to claim 1, Wherein, the first radiation patch has a plurality of first openings, and the display substrate further includes a pixel defining layer disposed on the side of the first electrode of the light-emitting device facing away from the substrate; the pixel defining layer has a plurality of accommodating portions, and one of the first openings is disposed corresponding to one of the accommodating portions.

3. For the correspondingly disposed first opening and the accommodating portion in the display substrate according to claim 2, the orthographic projection of the first opening on the substrate covers the orthographic projection of the accommodating portion on the substrate.

4. The display substrate according to claim 2, Wherein, for the correspondingly disposed first opening and the accommodating portion, the contour shapes of their orthographic projections on the substrate are the same.

5. The display substrate according to claim 2, Wherein, each antenna unit further includes at least one feeding structure, and the feeding structure is electrically connected to the first radiation patch through a feeding line.

6. The display substrate according to claim 5, Wherein, the display substrate includes a display area and a non-display area, and the feeding line extends from the display area to the non-display area and is electrically connected to the feeding structure.

7. The display substrate according to claim 5, Wherein, the feeding line has a second opening, and one of the second openings is disposed corresponding to one of the accommodating portions.

8. The display substrate according to claim 5, Wherein, the antenna unit includes a first feeding line and a second feeding line, and the extending directions of the first feeding line and the second feeding line are different.

9. The display substrate according to claim 2, Wherein, each antenna unit further includes at least one second radiation patch, wherein, the orthographic projection of the conductive portion of the second radiation patch on the substrate is covered by the orthographic projection of the black matrix on the substrate.

10. The display substrate according to claim 9, Wherein, the second radiation patch has a fourth opening, and one of the fourth openings is disposed corresponding to one of the accommodating portions.

11. The display substrate according to claim 9, Wherein, the orthographic projection of the second radiation patch on the substrate is located between the orthographic projections of the two corresponding first radiation patches of two adjacent antenna units on the substrate. In the thickness direction of the substrate, the maximum height of the first radiation patch is Y; In the direction parallel to the substrate, the maximum length of the first radiation patch is X, wherein, The distance between the center of the second radiation patch and the center of the first radiation patch in the direction along the thickness of the substrate is Y / 2; The distance between the center of the second radiation patch and the center of the first radiation patch in the direction parallel to the substrate is X / 2.

12. The display substrate according to claim 9, wherein, The contour shape of the orthographic projection of the first radiation patch on the substrate is a first polygon, where the first polygon includes a plurality of first sides and second sides connecting adjacent first sides; the first sides and the second sides are connected in sequence, and all interior angles of the first polygon are obtuse angles; The contour shape of the orthographic projection of the second radiation patch on the substrate is a second polygon, where the second polygon includes a plurality of third sides and fourth sides connecting adjacent third sides; the third sides and the fourth sides are connected in sequence, and all interior angles of the second polygon are obtuse angles.

13. The display substrate according to claim 1, wherein, The display substrate further includes a sensing layer disposed on a side of the light-emitting device close to the black matrix, and the antenna structure is disposed on a side of the sensing layer close to the black matrix.

14. The display substrate according to claim 1, wherein, The display substrate further includes a heat dissipation layer disposed on a side of the substrate facing away from the light-emitting device.

15. A display device, which includes a display panel, and the display panel includes any one of the display substrates according to claims 1-14.

16. The display device according to claim 15, wherein, It further includes a middle frame and a rear cover that are sequentially disposed on a side of the display panel facing away from the display surface.

17. A method for manufacturing a display substrate, which includes: Providing a substrate; Forming a plurality of light-emitting devices on the substrate; Forming a color filter layer on a light-emitting side of the light-emitting device; The color filter layer includes color filter films corresponding to the light-emitting devices one by one, and a black matrix is formed between the adjacent color filter films; wherein, the method further includes: Forming an antenna structure on a side of the color filter layer close to the light-emitting device; the antenna structure includes a plurality of antenna units, and the antenna unit includes a first radiation patch; The orthographic projection of the conductive part of the first radiation patch on the substrate is located within the orthographic projection of the black matrix on the substrate.

18. The method according to claim 17, wherein, The first radiation patch has a plurality of first openings, and the method further includes: Forming a pixel defining layer on a side of the first electrode of the light-emitting device facing away from the substrate; the pixel defining layer has a plurality of accommodating parts, and one of the first openings corresponds to one of the accommodating parts.

19. The method according to claim 18, wherein, For the corresponding first opening and the accommodating part, the orthographic projection of the first opening on the substrate covers the orthographic projection of the accommodating part on the substrate.

20. The method according to claim 17, wherein, The method further includes: A sensing layer is formed on a side of the light-emitting device close to the black matrix, and the antenna structure is disposed on a side of the sensing layer close to the black matrix.

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