Display device, communication apparatus and millimeter-wave antenna

Abstract

Provided in the present disclosure are a display device, a communication apparatus and a millimeter-wave antenna. The display device comprises: a display panel which has a display area and a non-display area surrounding the display area, the non-display area having a metal pattern; and the millimeter-wave antenna which is located on a non-display side of the display panel, and is located in the non-display area, wherein the orthographic projection of the millimeter-wave antenna on the display panel is located on the side of the metal pattern that is away from the display area, and the width of the metal pattern in the non-display area in which the millimeter-wave antenna is arranged is smaller than the widths of other metal patterns in the non-display area.

Description

Display device, communication equipment and millimeter wave antenna Technical Field

[0001] The present disclosure relates to the field of communication technology, and in particular to a display device, a communication device, and a millimeter wave antenna. Background Art

[0002] Modern wireless communication technology is developing rapidly to meet people's demand for information. With the advent of the 5G era, the millimeter wave frequency band is gradually being utilized more and more. The most critical component in 5G millimeter wave communication technology is the millimeter wave antenna.

[0003] Summary of the Invention

[0004] The present disclosure provides a display device, a communication device, and a millimeter wave antenna. The specific solutions are as follows:

[0005] The present disclosure provides a display device comprising:

[0006] a display panel, the display panel comprising a display area and a non-display area surrounding the display area, the non-display area comprising a metal pattern;

[0007] A millimeter wave antenna is located on the non-display surface side of the display panel and in the non-display area. The orthographic projection of the millimeter wave antenna on the display panel is located on the side of the metal pattern away from the display area, and the width of the metal pattern in the non-display area where the millimeter wave antenna is provided is smaller than the width of the metal pattern in other non-display areas.

[0008] In one possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, an insulating structure is provided on a side of the metal pattern adjacent to the millimeter wave antenna away from the display area, the insulating structure and the metal pattern are located in the same film layer, and the orthographic projection of the millimeter wave antenna on the display panel at least covers a portion of the insulating structure.

[0009] In a possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the display panel includes: a base substrate, and an interlayer insulating layer, a first source-drain metal layer, a passivation layer, a first planarization layer, a second source-drain metal layer, a second planarization layer, an anode layer, a pixel defining layer, a light-emitting functional layer, a cathode layer, and an encapsulation layer, which are stacked in sequence on a side of the base substrate facing away from the millimeter-wave antenna; wherein,

[0010] The first source-drain metal layer, the second source-drain metal layer, and the anode layer located in the non-display area have a common overlapping area, and the first source-drain metal layer, the second source-drain metal layer, and the anode layer in the common overlapping area are electrically connected in pairs to form the metal pattern;

[0011] The metal pattern in the non-display area where the millimeter wave antenna is provided has a groove on its side away from the display area that passes through the bottom of the first source and drain metal layer to the top of the anode layer, and the insulating structure fills the groove.

[0012] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the material of the insulating structure is an organic material.

[0013] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the non-display area includes a first border area, a second border area, a third border area, and a fourth border area; the first border area and the third border area are located on two opposite sides of the display area, and the second border area and the fourth border area are located on the other opposite sides of the display area; wherein,

[0014] The first border area has a fan-out routing area, and the millimeter wave antenna is arranged in at least one of the second border area, the third border area, and the fourth border area.

[0015] In one possible implementation, in the display device provided in an embodiment of the present disclosure, in a first direction from the display area to the non-display area, the millimeter wave antenna includes a first metal portion, a second metal portion, and a third metal portion electrically connected in sequence; in a second direction, the second direction is perpendicular to the first direction, the width of the first metal portion and the width of the third metal portion are both greater than the width of the second metal portion, and the second metal portion is located in a central region between the first metal portion and the third metal portion;

[0016] The millimeter wave antenna further includes a first dipole slot and a second dipole slot arranged along the second direction;

[0017] The first dipole slot includes a first slot and a second slot, the first slot is located inside the third metal portion and extends along the second direction, the second slot extends along the first direction and passes through the first metal portion and the second metal portion and is connected to the first slot inside the third metal portion;

[0018] The second dipole slot includes a third slot and a fourth slot, the third slot is located inside the third metal part and extends along the second direction, the fourth slot extends along the first direction and passes through the first metal part and the second metal part and is connected to the third slot inside the third metal part.

[0019] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the portion between the first dipole slot and the second dipole slot constitutes a coplanar waveguide signal line, the portion of the first metal part located at the first dipole slot away from the second dipole slot constitutes a first coplanar waveguide metal ground, and the portion of the first metal part located at the second dipole slot away from the first dipole slot constitutes a second coplanar waveguide metal ground.

[0020] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the first metal portion, the second metal portion, and the third metal portion are an integrated structure.

[0021] In a possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the millimeter wave antenna is an axisymmetric figure, the axis of symmetry of the millimeter wave antenna extends along the first direction, and the two parts of the millimeter wave antenna located on both sides of the axis of symmetry are symmetrically arranged about the axis of symmetry.

[0022] In a possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the width of the millimeter wave antenna along the first direction is 0.3 mm to 0.45 mm, and the length of the first metal part along the second direction is 4.8 mm to 5.5 mm.

[0023] In one possible implementation, the display device provided in the embodiment of the present disclosure further includes a feeding network structure for feeding the millimeter wave antenna, wherein the feeding network structure is located on a side of the first metal part away from the third metal part; the feeding network structure includes: a coplanar waveguide feeding line electrically connected to the coplanar waveguide signal line, a first coplanar waveguide grounding structure electrically connected to the first coplanar waveguide metal ground, and a second coplanar waveguide grounding structure electrically connected to the second coplanar waveguide metal ground.

[0024] In a possible implementation, in the above-mentioned display device provided in an embodiment of the present disclosure, the orthographic projection of the feed network structure on the display panel covers part of the non-display area and part of the display area.

[0025] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the width of the coplanar waveguide feed line is greater than the width of the coplanar waveguide signal line, the distance between the coplanar waveguide feed line and the first coplanar waveguide ground structure is less than the width of the first dipole slot, and the distance between the coplanar waveguide feed line and the second coplanar waveguide ground structure is less than the width of the inverted second dipole slot.

[0026] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the coplanar waveguide feed line and the coplanar waveguide signal line are an integrated structure, the first coplanar waveguide metal ground and the first coplanar waveguide grounding structure are an integrated structure, and the second coplanar waveguide metal ground and the second coplanar waveguide grounding structure are an integrated structure.

[0027] In one possible implementation, the above-mentioned display device provided in the embodiment of the present disclosure further includes: a flexible circuit board located on the side of the millimeter wave antenna facing away from the display panel, and a substrate located between the millimeter wave antenna and the flexible circuit board; the flexible circuit board has a radio frequency module, and the feeding network structure is electrically connected to the radio frequency module.

[0028] In a possible implementation, in the above-mentioned display device provided by an embodiment of the present disclosure, the feeding network structure is bent to the back side of the substrate through a flexible connection portion and is electrically connected to the RF module.

[0029] In a possible implementation, the display device provided in the embodiment of the present disclosure further includes a reflective plate located between the substrate and the flexible circuit board.

[0030] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the thickness of the substrate is 100 μm to 250 μm.

[0031] In a possible implementation, in the display device provided in the embodiment of the present disclosure, the number of the millimeter wave antennas is at least two, and the millimeter wave antennas are arranged in a line along the second direction.

[0032] In a possible implementation, in the display device provided in the embodiment of the present disclosure, adjacent coplanar waveguide metal grounds of two adjacent millimeter wave antennas are an integrated structure.

[0033] Correspondingly, an embodiment of the present disclosure further provides a communication device, comprising the above-mentioned display device provided by an embodiment of the present disclosure.

[0034] Accordingly, an embodiment of the present disclosure further provides a millimeter wave antenna for integration with a display panel, the millimeter wave antenna comprising a first metal portion, a second metal portion, and a third metal portion electrically connected in sequence along a first direction; along a second direction, the second direction is perpendicular to the first direction, the width of the first metal portion and the width of the third metal portion are both greater than the width of the second metal portion, and the second metal portion is located in a central region between the first metal portion and the third metal portion;

[0035] The millimeter wave antenna further includes a first dipole slot and a second dipole slot arranged along the second direction;

[0036] The first dipole slot includes a first slot and a second slot, the first slot is located inside the third metal portion and extends along the second direction, the second slot extends along the first direction and passes through the first metal portion and the second metal portion and is connected to the first slot inside the third metal portion;

[0037] The second dipole slot includes a third slot and a fourth slot, the third slot is located inside the third metal part and extends along the second direction, the fourth slot extends along the first direction and passes through the first metal part and the second metal part and is connected to the third slot inside the third metal part.

[0038] In a possible implementation, in the above-mentioned millimeter wave antenna provided in an embodiment of the present disclosure, the portion between the first dipole slot and the second dipole slot constitutes a coplanar waveguide signal line, the portion of the first metal part located in the first dipole slot away from the second dipole slot constitutes a first coplanar waveguide metal ground, and the portion of the first metal part located in the second dipole slot away from the first dipole slot constitutes a second coplanar waveguide metal ground.

[0039] In a possible implementation, in the above-mentioned millimeter wave antenna provided in an embodiment of the present disclosure, the first metal part, the second metal part, and the third metal part are an integrated structure.

[0040] In a possible implementation, in the above-mentioned millimeter wave antenna provided in an embodiment of the present disclosure, the millimeter wave antenna is an axisymmetric figure, the axis of symmetry of the millimeter wave antenna extends along the first direction, and the two parts of the millimeter wave antenna located on both sides of the axis of symmetry are symmetrically arranged about the axis of symmetry.

[0041] In a possible implementation, in the above-mentioned millimeter wave antenna provided in an embodiment of the present disclosure, the width of the millimeter wave antenna along the first direction is 0.3 mm to 0.45 mm, and the length of the first metal part along the second direction is 4.8 mm to 5.5 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG1 is a schematic top view of a display device provided by an embodiment of the present disclosure;

[0043] FIG2 is a schematic cross-sectional view taken along the CC' direction in FIG1 ;

[0044] FIG3 is a simplified diagram of the film structure of the non-display area DS of the screen in the related art;

[0045] FIG4 is a simplified diagram of the thickness film structure of the metal pattern 2 in the non-display area DS after the groove processing according to the embodiment of the present disclosure;

[0046] FIG5 is a schematic diagram of a specific film layer structure of the non-display area DS in FIG3 ;

[0047] FIG6 is a schematic diagram of grooving the metal pattern 2 in FIG5 ;

[0048] FIG7 is a plan view of a millimeter wave antenna integrated into the upper frame of the display panel 1 according to an embodiment of the present disclosure;

[0049] FIG8 is an enlarged plan view of a millimeter wave antenna in FIG7 ;

[0050] FIG9 is a schematic diagram showing simulation results of the port S11 of the millimeter wave antenna shown in FIG8 as the frequency changes;

[0051] FIG10 is a schematic diagram of the peak gain simulation results of the millimeter wave antenna shown in FIG8 in the frequency range of 24 GHz to 32 GHz;

[0052] FIG11 is a schematic diagram showing the simulation results of the radiation efficiency of the millimeter wave antenna shown in FIG8 ;

[0053] FIG12 is a partial enlarged schematic diagram of the upper frame in FIG7 ;

[0054] FIG13 is an enlarged schematic diagram of the dashed box EE in FIG12;

[0055] FIG14 is a schematic diagram showing simulation results of the port S11 of the millimeter wave antenna array shown in FIG7 as the frequency changes;

[0056] FIG15 is a schematic diagram showing the peak gain simulation results of the millimeter wave antenna array shown in FIG7 in the frequency range of 24 GHz to 32 GHz;

[0057] FIG16 is a radiation pattern of a millimeter wave antenna array provided by an embodiment of the present disclosure;

[0058] FIG17 is a simplified structural diagram of a display device provided by an embodiment of the present disclosure;

[0059] FIG18 is a schematic diagram of S11 simulation results of the millimeter wave antenna array in FIG12 after adding a reflector 8 according to an embodiment of the present disclosure;

[0060] FIG19 is a schematic diagram of peak gain simulation results of the millimeter wave antenna array of FIG12 after adding a reflector 8 according to an embodiment of the present disclosure;

[0061] FIG20 is a radiation pattern of the millimeter wave antenna array shown in FIG12 after a reflector is added, provided by an embodiment of the present disclosure. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. And in the absence of conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0063] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “include” or “comprise” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connect” or “connected” and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. “Inside”, “outside”, “upper”, “lower”, etc. 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.

[0064] It should be noted that the sizes and shapes of the figures in the accompanying drawings do not reflect the actual scale and are only for the purpose of illustrating the present disclosure. The same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions.

[0065] With the advent of the 5G era, the demand for mobile terminal device antennas is gradually increasing, and the number of antennas used is also gradually increasing. However, the design space for antennas in mobile terminal devices is extremely limited. As the screen-to-body ratio of mobile terminal devices increases, the design space for antennas is further squeezed, resulting in a very tight design space. To solve this problem, related technologies have proposed on-screen antenna technology solutions that make the antenna compatible with the screen. However, existing on-screen antenna technology solutions often require the antenna to be gridded. To ensure the consistency of the screen display effect, a layer of metal grid must be laid across the entire screen. This will not only reduce the screen display effect, but also make the metal grid manufacturing process extremely difficult.

[0066] In order to solve the above technical problems, the present disclosure provides a display device, as shown in Figures 1 and 2, Figure 1 is a schematic top view of the display device, and Figure 2 is a schematic cross-sectional view along the CC' direction in Figure 1, the display device comprising:

[0067] A display panel 1, the display panel 1 having a display area AA and a non-display area DS surrounding the display area AA, the non-display area DS having a metal pattern 2;

[0068] The millimeter wave antenna 3 is located on the side of the non-display surface 11 of the display panel 1 and in the non-display area DS. The orthographic projection of the millimeter wave antenna 3 on the display panel 1 is located on the side of the metal pattern 2 away from the display area AA, and the width of the metal pattern 2 in the non-display area DS where the millimeter wave antenna 3 is provided is smaller than the width of the metal pattern 2 in other non-display areas DS.

[0069] As the screen-to-body ratio of mobile terminal devices becomes higher and higher, the width of the non-display area DS of the current mobile terminal screen is generally about 1mm, as shown in Figure 3, which is a simplified diagram of the film structure of the non-display area DS of the screen in the related art, including a base substrate 11, an inorganic insulating layer 12, a metal pattern 2, an encapsulation layer 13, a polarizer 14, an optical adhesive layer 15 and a cover plate 16 stacked in sequence, wherein the metal pattern 2 only covers part of the non-display area DS (area D), and the S area is the area where the metal pattern 2 is not set. Since the metal pattern 2 (such as a trace) is set within most of the width of the non-display area DS (area D), the electrical signal is connected; however, the width of the S area where the metal pattern 2 is not set is approximately 265μm. When the millimeter wave antenna 3 is integrated with the display panel 1, in order to avoid the millimeter wave antenna 3 reducing the display effect of the screen when integrated with the screen, the millimeter wave antenna 3 structure can be designed in the non-display area DS of the non-display surface 11 of the display panel 1. Since the metal pattern 2 will affect the radiation performance of the millimeter wave antenna 3, only the S area with a width of about 265μm in Figure 3 of the related art is used to integrate the millimeter wave antenna 3. This size is very difficult for the design of the millimeter wave antenna 3. Therefore, the embodiment of the present disclosure designs a display device structure integrating a display panel and a millimeter wave antenna. As shown in Figures 1 and 2, the positive projection of the millimeter wave antenna 3 provided by the embodiment of the present disclosure on the display panel 1 is located on the side of the metal pattern 2 away from the display area AA, and the width of the metal pattern 2 in the non-display area DS (for example, the B3 area) where the millimeter wave antenna 3 is provided is smaller than the width of the metal pattern 2 in other non-display areas DS (B1, B2 and B4 areas). In this way, the metal pattern 2 in the D area in Figure 3 can be dug out to a certain width W (for example, about 140μm). As shown in Figure 4, after the metal pattern 2 in the D area in Figure 4 is dug out to a certain width W, Sufficient space (265μm+140μm=405μm) can be reserved for the design of the millimeter wave antenna 3. This width is sufficient for designing the millimeter wave antenna 3 structure, and the width of the metal pattern 2 in other non-display areas DS where the millimeter wave antenna 3 is not provided is the same as the width of the metal pattern 2 in Figure 3. For example, in Figure 1, the millimeter wave antenna 3 is provided in area B3, and the portion of the metal pattern 2 in area B3 close to area S is dug out, so that the width of the metal pattern 2 in area B3 is smaller than the width of the metal pattern 2 in areas B1, B2, and B4, that is, the width of the metal pattern 2 in area B3 is the width in Figure 4, and the width of the metal pattern 2 in areas B1, B2, and B4 is the width in Figure 3. Therefore, the present disclosure integrates a millimeter wave antenna 3 in the non-display area DS of the display panel 1, which utilizes the existing display panel structure, improves the integration of the millimeter wave antenna 3 and the display panel 1, and thus expands the utilization space of the millimeter wave antenna 3 in the terminal device.

[0070] In addition, the embodiment of the present disclosure designs the millimeter wave antenna on the non-display surface of the display panel. Compared with a related art solution of placing the antenna on the same layer of the OLED, the embodiment of the present disclosure does not affect the actual film structure of the display panel and does not need to change the manufacturing process of the existing display panel; and, compared with a metal grid on-screen antenna in the related art, the integration solution of the display panel and the millimeter wave antenna proposed in the embodiment of the present disclosure does not affect the display quality of the display panel, will not cause the optical transmittance of the display panel to decrease, and at the same time, does not need to increase the thickness of the display panel, and the millimeter wave antenna and the display panel are highly integrated.

[0071] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in FIG2 and FIG4 , an insulating structure 4 is provided on the side of the metal pattern 2 adjacent to the millimeter wave antenna 3 away from the display area AA. The insulating structure 4 and the metal pattern 2 are located in the same film layer, and the orthographic projection of the millimeter wave antenna 3 on the display panel 1 at least partially covers the insulating structure 4. In this way, after the metal pattern 2 in the display panel 1 is manufactured, the metal pattern 2 in the non-display area (e.g., area B3) where the millimeter wave antenna 3 needs to be integrated can be grooved separately to remove a certain width of the metal pattern 2. The specific groove process adopts an etching process. In order to maintain the flatness of the film layer in the display panel 1, after the metal pattern 2 is grooved, the grooved area is filled with insulating material to form an insulating structure 4 to ensure that the area after the groove is consistent with the film layer structure of the original metal pattern 2 area, thereby not affecting the display performance of the display panel 1.

[0072] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in Figure 5, Figure 5 is a schematic diagram of the specific film layer structure of the non-display area DS of the display panel in Figure 1, which may specifically include: a base substrate 11, and an interlayer insulating layer (ILD), a first source-drain metal layer (SD1), a passivation layer (PVX), a first flat layer (PLN1), a second source-drain metal layer (SD2), a second flat layer (PLN2), an anode layer (Ano), a pixel defining layer (PDL), a light-emitting functional layer (EL), a cathode layer (Cat) and an encapsulation layer (CVD) stacked in sequence on the side of the base substrate 11 away from the millimeter wave antenna 3. The blank area on the right side of the encapsulation layer (CVD) is an organic material (such as a COP material) with a width of approximately 260 μm. It can be seen from Figure 3 that the screen structure shown in Figure 5 does not meet the antenna design requirements, so the present disclosure proposes to remove a part of the metal pattern that blocks the millimeter wave antenna to obtain good antenna performance. Generally, in order to reduce the resistance of metal routing, a double-layer routing or even a triple-layer routing in parallel can be used to form the metal routing. FIG5 takes the metal routing in the non-display area DS as an example, where the three-layer routing is connected in parallel, namely, the first source-drain metal layer (SD1), the second source-drain metal layer (SD2), and the anode layer (Ano). That is, the first source-drain metal layer (SD1), the second source-drain metal layer (SD2), and the anode layer (Ano) in the non-display area DS have a common overlapping area. In the common overlapping area, the first source-drain metal layer (SD1), the second source-drain metal layer (SD2), and the anode layer (Ano) are electrically connected in pairs to form a metal pattern 2 before the groove is dug in the non-display area DS. As shown in Figure 6, Figure 6 is a schematic diagram of grooving the metal pattern 2 in Figure 5, that is, the metal pattern 2 in the non-display area DS where the millimeter wave antenna 3 is provided has a groove on the side away from the display area AA that runs through the bottom of the first source and drain metal layer (SD1) to the top of the anode layer (Ano), and the insulating structure 4 fills the groove, that is, the three-layer parallel wiring of the first source and drain metal layer (SD1), the second source and drain metal layer (SD2) and the anode layer (Ano) is grooved with a certain width W, and the groove is filled with insulating material to maintain the consistency of the film layer before and after the grooving, plus the S area on the right side without a metal pattern, that is, the width range of the W+S area can ensure that there is enough space to set the millimeter wave antenna 3, so as to reduce the influence of the metal pattern 2 in the display panel 1 on the radiation performance of the millimeter wave antenna 3.

[0073] It should be noted that Figure 6 takes the example of three layers of parallel wiring for the metal wiring in the non-display area. Of course, the metal wiring in the non-display area DS may also adopt a single layer of wiring or a double layer of parallel wiring or four or even more layers of parallel wiring. However, no matter how many layers of parallel wiring are used, when the metal pattern 2 is grooved, the metal pattern 2 within the aforementioned width W can be dug out to ensure that there is no metal pattern 2 directly above the millimeter wave antenna 3, thereby avoiding the metal pattern 2 affecting the radiation performance of the millimeter wave antenna 3.

[0074] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in Figures 2, 4, and 6, the insulating structure 4 may be made of an organic material. This effectively fills the grooved area of ​​the display panel 1, ensuring consistency in the film structure of the display panel 1 before and after the grooves are formed, thereby not affecting the display effect of the display panel 1.

[0075] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in Figures 2 and 4, the material of the insulating structure 4 may include but is not limited to polyimide (PI), cycloolefin polymer (COP) or polyethylene terephthalate (PET).

[0076] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in FIG1 and FIG2 , the non-display area DS includes a first border area B1, a second border area B2, a third border area B3, and a fourth border area B4; the first border area B1 and the third border area B3 are located on one opposite side of the display area AA, and the second border area B2 and the fourth border area B4 are located on the other opposite side of the display area AA; wherein,

[0077] The first border area B1 has a fan-out routing area, and the millimeter wave antenna 3 is arranged in at least one of the second border area B2, the third border area B3 and the fourth border area B4. Specifically, since the first border area B1 (i.e., the lower border) of the display panel 1 is generally used to set the fan-out routing, there are a large number of metal routings in this area, which is not suitable for integrating the millimeter wave antenna 3. Therefore, the present disclosure can integrate the millimeter wave antenna 3 in any one of the second border area B2 (i.e., the left border), the third border area B3 (i.e., the upper border) and the fourth border area B4 (i.e., the right border), or can integrate the millimeter wave antenna 3 in any two of them, or can also integrate the millimeter wave antenna 3 in all three areas.

[0078] It should be noted that the embodiment of the present disclosure takes the integration of a millimeter wave antenna in the third border area B3 (i.e., the upper border) as an example. By digging out a certain width of the metal pattern 2 in the third border area B3, there is enough space in the third border area B3 (an area without a metal pattern 2) to set the millimeter wave antenna 3. In this way, there is no metal pattern 2 directly above the millimeter wave antenna 3, which can avoid the metal pattern 2 affecting the radiation performance of the millimeter wave antenna 3.

[0079] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in Figures 7 and 8, Figure 7 is a planar schematic diagram of an integrated millimeter wave antenna 3 in the third frame area B3 (i.e., the upper frame) of the display panel 1, and Figure 8 is an enlarged planar schematic diagram of a millimeter wave antenna 3 in Figure 7. In a first direction X pointing from the display area AA to the non-display area DS, the millimeter wave antenna 3 includes a first metal portion 31, a second metal portion 32, and a third metal portion 33 electrically connected in sequence; along a second direction Y, the second direction Y is perpendicular to the first direction X, the width of the first metal portion 31 and the width of the third metal portion 33 are both greater than the width of the second metal portion 32, and the second metal portion 32 is located in the central area between the first metal portion 31 and the third metal portion 33;

[0080] The millimeter wave antenna 3 further includes a first dipole slot 34 and a second dipole slot 35 arranged along the second direction Y;

[0081] The first dipole slot 34 includes a first slot 341 and a second slot 342 . The first slot 341 is located inside the third metal portion 33 and extends along the second direction Y. The second slot 342 extends along the first direction X and penetrates the first and second metal portions 31 and 32 and is connected to the first slot 341 inside the third metal portion 33 .

[0082] The second dipole slot 35 includes a third slot 351 and a fourth slot 352. The third slot 351 is located inside the third metal part 33 and extends along the second direction Y. The fourth slot 352 extends along the first direction X and passes through the first metal part 31 and the second metal part 32 and is connected to the third slot 351 inside the third metal part 33. Thus, the millimeter wave antenna forms a dipole antenna structure. Since the structure of the dipole antenna provided in the embodiment of the present disclosure only needs to be made of one metal layer, the structure of the dipole antenna is relatively simple and easy to integrate with the display panel 1.

[0083] As shown in FIG. 7 , the schematic W region is the groove region in FIG. 4 . When the metal pattern 2 is grooved, the shape of the groove region is generally a trapezoidal groove due to the influence of the etching process.

[0084] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in FIG8 , the portion between the first dipole slot 34 and the second dipole slot 35 constitutes a coplanar waveguide signal line 101. The portion of the first metal portion 31 located at the first dipole slot 34 away from the second dipole slot 35 constitutes a first coplanar waveguide metal ground GND1. The portion of the first metal portion 31 located at the second dipole slot 35 away from the first dipole slot 34 constitutes a second coplanar waveguide metal ground GND2. Thus, the coplanar waveguide signal line 101, the first coplanar waveguide metal ground GND1, and the second coplanar waveguide metal ground GND2 constitute a microwave signal transmission structure that can transmit (receive and send) microwave signals.

[0085] Specifically, the present disclosure adopts a coplanar waveguide-fed dipole millimeter wave antenna with a simple antenna structure, which can reduce the antenna's dependence on the clearance area, thereby eliminating the need to increase the thickness of the display panel. The dipole antenna in the current related art is approximately 6 mm in size in the millimeter wave 24.25 GHz to 27.5 GHz frequency band. It is obviously very difficult to integrate this size with the existing display panel design, so the millimeter wave antenna needs to be miniaturized. The coplanar waveguide-fed dipole millimeter wave antenna provided in the embodiment of the present disclosure has a metal ground and a radiation structure (the area excluding the gap in the third metal part 33) that are connected together. The gaps on the left and right sides of the second metal part 32 make the coplanar waveguide metal ground constitute a defective ground structure, which partially separates the coplanar waveguide metal ground from the radiation structure. Through the design of the defective ground structure, the current path can be extended, thereby miniaturizing the millimeter wave antenna. By optimizing the various structural parameters of the millimeter wave antenna, the width size W of the millimeter wave antenna can eventually be reduced. (31+32+33) Reduced to 0.4mm, length dimension W gnd Due to the extremely small width of the millimeter wave antenna, it can be integrated into the frame of the display panel 1, which does not affect the display quality of the display panel 1 and does not increase the thickness of the display panel 1.

[0086] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in Figure 8, a metal sheet can be etched to form the first dipole gap 34, the second dipole gap 35, and the vacancies (grooves) on the left and right sides of the second metal part 32 shown in Figure 8, that is, a dipole millimeter wave antenna with a coplanar waveguide defect ground structure is integrated on the non-display surface side of the display panel 1.

[0087] In some embodiments, in the display device provided by the embodiment of the present disclosure, as shown in FIG8 , the resonant frequency of the millimeter wave antenna is determined by the antenna length (Wa1+Wa2), and gnd Nothing to do. gndThe size of Ws1 is related to the wavelength, and its optimization is to find an optimal impedance matching size around half the wavelength to maximize the performance and radiation efficiency of the millimeter wave antenna. Ws1 and Ws2 are intended to broaden the bandwidth of the millimeter wave antenna. Their lengths can control the path length of the current on the millimeter wave antenna, thereby expanding the bandwidth to a certain extent. The length of (Wa1+Wa2) determines the resonant frequency of the millimeter wave antenna. Therefore, the embodiment of the present disclosure can optimize the size of each parameter in the millimeter wave antenna shown in Figure 8 to achieve a millimeter wave antenna with impedance matching, high gain, and high radiation efficiency.

[0088] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in FIG8 , the first metal portion 31, the second metal portion 32, and the third metal portion 33 may be an integral structure. This allows the millimeter wave antenna structure shown in FIG8 to be formed on a single metal sheet through an etching process, simplifying the manufacturing process.

[0089] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in FIG8 , the millimeter wave antenna 3 can be an axisymmetric figure, the symmetry axis L of the millimeter wave antenna 3 extends along the first direction X, and the two parts of the millimeter wave antenna 3 located on both sides of the symmetry axis L are symmetrically arranged about the symmetry axis L. In this way, the millimeter wave antenna is easy to process and manufacture, and the difficulty of grooving the metal pattern in the non-display area is also reduced. In addition, the symmetrically designed millimeter wave antenna can improve the radiation performance of the millimeter wave antenna. Of course, in some embodiments, the millimeter wave antenna 3 can also be an asymmetric structure. For example, the width of the first slit 341 along the second direction Y is different from the width of the third slit 351 along the second direction Y. Specifically, a symmetrical millimeter wave antenna structure or an asymmetric millimeter wave antenna structure can be designed according to actual needs, and the embodiment of the present disclosure is not limited to this.

[0090] In some embodiments, in the display device provided by the embodiment of the present disclosure, as shown in FIG8 , the width W of the millimeter wave antenna 3 along the first direction X is (31+32+33) The length W of the first metal portion 31 along the second direction Y can be 0.3 mm to 0.45 mm. gnd The size range is 4.8mm to 5.5mm. The millimeter wave antenna within this size range is easy to integrate with the display panel that requires a narrow frame. The embodiment of the present disclosure is based on the width W of the millimeter wave antenna 3 along the first direction X. (31+32+33) The length W of the first metal portion 31 along the second direction Y is 0.4 mm. gnd Take 5.2mm as an example, of course it is not limited to this.

[0091] In the disclosed embodiment, the present disclosure also simulated the frequency variation of port S11 of the millimeter-wave antenna shown in FIG8 . The simulation results are shown in FIG9 . As can be seen from the simulation results in FIG9 , the operating frequency of the millimeter-wave antenna is in the range of 24 GHz to 32 GHz, which falls within the millimeter-wave frequency band. Furthermore, the S11 simulation results of the millimeter-wave antenna shown in FIG9 show that the millimeter-wave antenna has a bandwidth of 6 GHz at a -10 dB impedance, which is capable of covering the two commonly used 5G millimeter-wave frequency bands (24.25 GHz to 27.5 GHz and 26.5 GHz to 29.5 GHz).

[0092] As shown in Figure 10, Figure 10 shows the peak gain simulation results of the millimeter wave antenna shown in Figure 8 in the frequency range of 24GHz to 32GHz. From the simulation results shown in Figure 10, it can be seen that the maximum in-band gain of the millimeter wave antenna provided by the embodiment of the present disclosure reaches 3.53dBi, and the in-band flatness of the gain is also good.

[0093] As shown in FIG11 , FIG11 shows the radiation efficiency simulation results of the millimeter-wave antenna shown in FIG8 . It can be seen that the in-band radiation efficiency of the millimeter-wave antenna designed in the embodiment of the present disclosure can reach up to 70%, which is better than the radiation efficiency of the metal grid-on-screen antenna used in the related art.

[0094] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in Figures 2, 12, and 13, Figure 12 is a partially enlarged schematic diagram of the upper frame in Figure 7, and Figure 13 is an enlarged schematic diagram within the dotted box EE in Figure 12. The display device also includes a feeding network structure 5 for feeding the millimeter wave antenna 3. The feeding network structure 5 is located on the side of the first metal part 31 away from the third metal part 33; the feeding network structure 5 includes: a coplanar waveguide feeding line 51 electrically connected to the coplanar waveguide signal line 101, a first coplanar waveguide grounding structure 52 electrically connected to the first coplanar waveguide metal ground GND1, and a second coplanar waveguide grounding structure 53 electrically connected to the second coplanar waveguide metal ground GND2. That is, the present disclosure adopts a feeding network structure 5 in the form of coplanar waveguide feeding to feed the millimeter wave antenna 3, which has a simple structure and is easy to manufacture.

[0095] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in FIG. 2 , the orthographic projection of the feed network structure 5 on the display panel 1 may cover part of the non-display area DS and part of the display area AA.

[0096] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in Figures 12 and 13 , the width Wt of the coplanar waveguide feed line 51 is greater than the width of the coplanar waveguide signal line 101, the distance Wg between the coplanar waveguide feed line 51 and the first coplanar waveguide ground structure 52 is less than the width of the first dipole slot 34, and the distance Wg between the coplanar waveguide feed line 51 and the second coplanar waveguide ground structure 52 is less than the width of the inverted second dipole slot 35. Specifically, by optimizing the dimensions of Wt and Wg, the impedance of the millimeter wave antenna 3 can be matched, thereby optimizing the performance of the millimeter wave antenna 3.

[0097] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in Figures 12 and 13 , the coplanar waveguide feed line 51 and the coplanar waveguide signal line 101 are integrally formed, the first coplanar waveguide metal ground GND1 and the first coplanar waveguide ground structure 52 are integrally formed, and the second coplanar waveguide metal ground GND2 and the second coplanar waveguide ground structure 53 are integrally formed. This allows the millimeter wave antenna 3 and the feed network structure 5 to be formed on the same metal sheet through an etching process, further simplifying the manufacturing process.

[0098] Optionally, the metal sheet used to make the millimeter wave antenna can be a low-resistance, low-loss metal material such as copper, gold, or silver.

[0099] Since the entire millimeter-wave antenna is integrated with the display panel, the connection between the millimeter-wave antenna and the back-end RF module is particularly important. Therefore, in some embodiments, the above-mentioned display device provided in the embodiment of the present disclosure, as shown in Figure 2, also includes: a flexible circuit board 6 (FPC) located on the side of the millimeter-wave antenna 3 facing away from the display panel 1, and a substrate 7 located between the millimeter-wave antenna 3 and the flexible circuit board 6; the flexible circuit board 6 has a RF module, and the feed network structure 5 is electrically connected to the RF module. Specifically, the present disclosure realizes the electrical connection of the millimeter-wave antenna by designing the designed millimeter-wave antenna 3 on the back of the screen, so that the millimeter-wave antenna 3 is connected to the RF module on the flexible circuit board 6. This connection method is simple and direct, and does not require the use of metallized vias or bent FPC connection methods in related technologies. Moreover, this design scheme of the present disclosure can be used without affecting the actual screen film layer structure and without changing the manufacturing process flow of the existing screen. In addition, the distance between the millimeter-wave antenna 3 and the flexible circuit board 6 in the embodiment of the present disclosure can be adjusted by the thickness of the substrate 7.

[0100] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in FIG2 , the feed network structure 5 is electrically connected to the RF module by being bent to the back side of the substrate 7 through the flexible connection portion 8. Specifically, the structure of the flexible connection portion 8 can be the same as the three-part structure of the feed network structure 5 (the coplanar waveguide feed line 51, the first coplanar waveguide grounding structure 52, and the second coplanar waveguide grounding structure 53), that is, the flexible connection portion 8 can include a flexible feed line electrically connected to the coplanar waveguide feed line 51, a first flexible coplanar waveguide grounding structure electrically connected to the first coplanar waveguide grounding structure 52, and a second flexible coplanar waveguide grounding structure electrically connected to the second coplanar waveguide grounding structure 53. In this way, by bending the flexible connection portion 8 to the back side of the substrate 7 and electrically connecting it to the RF module, a binding connection between the flexible circuit board 6 and the millimeter wave antenna 3 is achieved.

[0101] In specific implementation, since the gain of a single millimeter-wave antenna is far from sufficient for the communication of a mobile terminal (such as a mobile phone), its radiation performance is far from enough, so the millimeter-wave antennas need to be arrayed. By designing an array of millimeter-wave antennas on the non-display surface of the display panel in this arraying manner, the ability of the communication system to receive and send signals can be improved. Therefore, in some embodiments, as shown in Figures 7 and 12, the number of millimeter-wave antennas 3 is at least two, and each millimeter-wave antenna 3 can be arranged in a straight line along the second direction Y. Specifically, the embodiment of the present disclosure forms a 1*4 straight-line array by arranging the millimeter-wave antennas 3 shown in Figure 8 in the third border area B3 (i.e., the upper border) of the non-display surface (back) of the display panel. In this way, a narrow-border design of the display device can be achieved on the basis of improving the ability of the communication system to receive and send signals.

[0102] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in Figure 7, the embodiment of the present disclosure takes the third border area B3 (i.e., the upper border) as an example, in which four millimeter wave antennas 3 are arranged in a straight line, and the width (S+W) of each millimeter wave antenna 3 along the first direction X is 0.4 mm, and the length along the second direction Y is 5.2 mm. Of course, the number of millimeter wave antennas 3 arranged in a straight line is not limited to 4, and the specific number of millimeter wave antennas 3 needs to be designed according to the size of the display panel 1. The embodiment of the present disclosure only schematically illustrates the number of millimeter wave antenna arrays.

[0103] It should be noted that the arrangement of the millimeter wave antenna 3 array is not limited to the straight-line arrangement shown in Figures 7 and 12. Of course, it can also be arranged in two rows or even more rows. However, this will increase the width of the border area, which is not worth the cost for display panels that pursue extremely narrow borders. Therefore, it is necessary to comprehensively consider the performance of the millimeter wave antenna array and the border width to select the array arrangement of the millimeter wave antenna.

[0104] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in Figures 12 and 13 , the adjacent coplanar waveguide metal grounds of two adjacent millimeter-wave antennas 3 are integrally structured. This allows each millimeter-wave antenna 3 and the corresponding feed network structure 5 to be formed using the same piece of metal through an etching process, further simplifying the manufacturing process and the structure.

[0105] In some embodiments, in the above-mentioned display device provided by the embodiment of the present disclosure, as shown in Figures 12 and 13, the embodiment of the present disclosure adopts a coplanar waveguide feeding method to feed a 1*4 millimeter wave antenna array, and the width of the feeding network structure 5 made on the non-display surface of the display panel 1 is kept consistent with the width of the millimeter wave antenna 3 array. Since the feeding network structure 5 needs to be made on the non-display surface of the display panel 1, the existence of the feeding network structure 5 will cause a step difference on the non-display surface side of the display panel 1, thereby causing the risk of lamination bubbles, and the high temperature of the bonding process on the non-display surface of the display panel 1 will cause the risk of display failure of the display panel, so the length of the feeding network structure 5 can be set to 3mm-8mm. As shown in Figure 13, Wg and Wt in the feeding network structure 5 can be matched with the impedance of the millimeter wave antenna 3.

[0106] In an embodiment of the present disclosure, the present disclosure also simulates the frequency variation of port S11 of the millimeter-wave antenna array shown in Figure 7, and a schematic diagram of the simulation results is shown in Figure 14. As can be seen from the simulation results in Figure 14, the millimeter-wave antenna array has an impedance bandwidth of 6.86 GHz at -10 dB, thus providing a high-bandwidth millimeter-wave antenna.

[0107] As shown in Figure 15, Figure 15 shows the peak gain simulation results of the millimeter wave antenna array shown in Figure 7 of the present disclosure in the frequency range of 24GHz to 32GHz. From the simulation results shown in Figure 15, it can be seen that the maximum in-band gain of the millimeter wave antenna array reaches 11.69dBi, which is better than the current packaged antenna (AiP) and metal grid screen antenna. Therefore, the present disclosure provides a high-gain millimeter wave antenna.

[0108] As shown in FIG16 , FIG16 is the radiation pattern of the millimeter wave antenna array shown in FIG7 of the present disclosure. It can be seen that the radiation direction thereof is along the horizontal direction of the screen.

[0109] Since the radiation direction of the millimeter wave antenna shown in FIG8 provided in the embodiment of the present disclosure is along the horizontal direction of the screen, for millimeter wave communication systems that require beam steering, such as mobile phones, the radiation direction of the millimeter wave antenna is perpendicular to the screen to better receive the radiation signal. Therefore, in some embodiments, in the above-mentioned display device provided in the embodiment of the present disclosure, as shown in FIG2 and FIG17, a reflector 8 located between the substrate 7 and the flexible circuit board 6 may also be included. The embodiment of the present disclosure adds a reflector 8 below the designed millimeter wave antenna 3, and makes the reflector 8 on the FPC bound to the millimeter wave antenna 3, and controls the distance between the millimeter wave antenna 3 and the reflector 8 by filling the substrate 7 between the millimeter wave antenna 3 and the reflector 8 to avoid the reflector 8 affecting the radiation performance of the millimeter wave antenna 3. This method of setting the reflector 8 not only realizes that the radiation direction of the millimeter wave antenna 3 is perpendicular to the screen of the display panel 1, but also protects the millimeter wave antenna 3 on the non-display surface 11 side of the display panel 1 from being damaged during the assembly process of the display panel 1. In addition, the setting of the reflector 8 can also shield electromagnetic disturbances from the inside of the terminal device to a certain extent. In addition, the reflector 8 is generally made of metal. In the embodiment of the present disclosure, by setting a substrate 7 between the millimeter wave antenna 3 and the reflector 8, the reflector 8 made of metal can avoid affecting the radiation performance of the millimeter wave antenna 3.

[0110] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in FIG. 2 , the millimeter wave antenna 3 , the feeding network structure 5 and the non-display surface 11 of the display panel 1 may be bonded together by optical adhesive.

[0111] In some embodiments, in the above-mentioned display device provided by the embodiments of the present disclosure, as shown in Figures 2 and 17, the material of the substrate 7 may include but is not limited to polyimide (PI), cycloolefin polymer (COP) or polyethylene terephthalate (PET).

[0112] In some embodiments, in the display device provided in the embodiments of the present disclosure, as shown in Figures 2 and 17 , the thickness of the substrate 7 (i.e., the distance between the millimeter wave antenna 3 and the reflector 8) can be 100 μm to 250 μm. Alternatively, the thickness of the substrate 7 can be 100 μm, 150 μm, 200 μm, 250 μm, etc. Figure 17 provided in the embodiments of the present disclosure takes the thickness of the substrate 7 as 100 μm as an example.

[0113] As shown in Figure 18, Figure 18 is a schematic diagram of the S11 simulation results of the millimeter wave antenna array after the reflector 8 is added to Figure 12 of the embodiment of the present disclosure. It can be seen that after the reflector 8 is added, the impedance bandwidth of the millimeter wave antenna 3 at -10dB is reduced to 2GHz; as shown in Figure 19, Figure 19 is a schematic diagram of the peak gain simulation results of the millimeter wave antenna array after the reflector 8 is added to Figure 12 of the embodiment of the present disclosure. From the peak gain results, the bandwidth greater than 8dBi is greater than 3GHz, and the highest gain reaches 13.36dBi.

[0114] As shown in FIG20 , FIG20 is a radiation pattern of the millimeter wave antenna array of FIG12 in an embodiment of the present disclosure after adding a reflector 8 , and the radiation direction thereof is mainly along a horizontal direction perpendicular to the screen.

[0115] In summary, to address the current challenges of high gain, high efficiency, and connection to back-end RF modules for millimeter-wave antennas integrated with display panels, the present disclosure proposes an implementable high-gain, high-radiation-efficiency coplanar waveguide transmission millimeter-wave antenna. The integration of this millimeter-wave antenna with a display panel provides at least the following beneficial effects:

[0116] (1) The disclosed embodiment improves the gain and radiation efficiency of the millimeter-wave antenna by constructing a symmetrical millimeter-wave antenna fed by a coplanar waveguide on the non-display side of the screen edge without changing the existing screen process and without affecting the screen display effect. This is of great value to the design of 5G millimeter-wave on-screen antennas.

[0117] (2) The disclosed embodiment utilizes the existing screen structure by constructing a coplanar waveguide-fed millimeter-wave antenna with a width of about 400 microns in the non-display area of ​​the screen, thereby improving the integration of the millimeter-wave antenna and the display panel, thereby expanding the utilization space of the millimeter-wave antenna in the terminal device.

[0118] (3) The disclosed embodiment uses a coplanar waveguide-fed millimeter wave antenna, which can reduce the millimeter wave antenna's dependence on the clearance area, thereby eliminating the need to increase the thickness of the screen.

[0119] (4) The disclosed embodiment places the millimeter-wave antenna on the non-display surface of the display panel, making the connection between the millimeter-wave antenna and the RF module simple and direct, without the need for metallized vias or bent FPC connections. Furthermore, compared to the related art approach of placing the antenna on the same layer as the OLED, this design does not affect the actual screen film structure and does not require changes to the existing screen manufacturing process.

[0120] (5) Compared with the existing metal grid on-screen antenna, the display panel and millimeter wave antenna integration scheme proposed in the embodiment of the present disclosure does not affect the screen display quality and does not cause the optical transmittance of the screen display to decrease. In addition, the gain and radiation efficiency of the millimeter wave antenna designed in the present disclosure are greatly improved compared with the metal grid on-screen antenna. At the same time, the millimeter wave antenna and the display panel are highly integrated without increasing the thickness of the screen.

[0121] In some embodiments, the display panel provided in the embodiments of the present disclosure may be an OLED display panel. The specific film layer structure and manufacturing process of the OLED display panel may be the same as those in the related art and will not be described in detail here.

[0122] In some embodiments, the display device provided by the embodiments of the present disclosure may further include other functional film layers well known to those skilled in the art, which are not listed here one by one.

[0123] Based on the same inventive concept, the present disclosure also provides a communication device including the display device provided in the present disclosure. The implementation of the communication device can refer to the embodiment of the display device, and the repeated parts will not be repeated.

[0124] In the embodiments of the present disclosure, the communication device may be, for example, a communication base station product, a mobile product, a radar detection device, a navigation device, and a product with other structures provided with components such as a chip and an antenna, which is not limited here.

[0125] Based on the same inventive concept, an embodiment of the present disclosure further provides a millimeter wave antenna for integration with a display panel. As shown in FIG8 , the millimeter wave antenna includes a first metal portion 31, a second metal portion 32, and a third metal portion 33 electrically connected in sequence along a first direction X. Along a second direction Y, which is perpendicular to the first direction X, the width of the first metal portion 31 and the width of the third metal portion 33 are both greater than the width of the second metal portion 32, and the second metal portion 32 is located in a central region between the first metal portion 31 and the third metal portion 33.

[0126] The millimeter wave antenna further includes a first dipole slot 34 and a second dipole slot 35 arranged along a second direction Y;

[0127] The first dipole slot 34 includes a first slot 341 and a second slot 342 . The first slot 341 is located inside the third metal portion 33 and extends along the second direction Y. The second slot 342 extends along the first direction X and penetrates the first and second metal portions 31 and 32 and is connected to the first slot 341 inside the third metal portion 33 .

[0128] The second dipole slot 35 includes a third slot 351 and a fourth slot 352. The third slot 351 is located inside the third metal part 33 and extends along the second direction Y. The fourth slot 352 extends along the first direction X and passes through the first metal part 31 and the second metal part 32 and is connected to the third slot 351 inside the third metal part 33. Thus, the millimeter wave antenna forms a dipole antenna structure.

[0129] In some embodiments, in the display device provided by the embodiments of the present disclosure, as shown in FIG8 , the portion between the first dipole slot 34 and the second dipole slot 35 constitutes a coplanar waveguide signal line 101, the portion of the first metal portion 31 located at the first dipole slot 34 away from the second dipole slot 35 constitutes a first coplanar waveguide metal ground GND1, and the portion of the first metal portion 31 located at the second dipole slot 35 away from the first dipole slot 34 constitutes a second coplanar waveguide metal ground GND2. Thus, the coplanar waveguide signal line 101, the first coplanar waveguide metal ground GND1, and the second coplanar waveguide metal ground GND2 constitute a microwave signal transmission structure that can transmit (receive and send) microwave signals.

[0130] Specifically, as shown in FIG8 , the present disclosure adopts a coplanar waveguide-fed millimeter wave antenna, which can reduce the antenna's dependence on the clearance area, thereby eliminating the need to increase the thickness of the screen; and the metal ground and the radiation structure (the area excluding the gap in the third metal part 33) of this coplanar waveguide-fed millimeter wave antenna are connected together, and the gaps on the left and right sides of the second metal part 32 are defective grounds, which partially separate the metal ground and the radiation structure. Through the design of the defective ground structure, the current path can be extended, thereby miniaturizing the millimeter wave antenna. By optimizing various structural parameters of the millimeter wave antenna, the width size W of the millimeter wave antenna can eventually be reduced. (31+32+33) Reduced to 0.4mm, length dimension W gnd Due to the extremely small width of the millimeter wave antenna, it can be integrated into the frame of the display panel, which neither affects the display quality of the display panel nor increases the thickness of the display panel.

[0131] As shown in Figure 8, the resonant frequency of the millimeter wave antenna is determined by the antenna length (Wa1+Wa2), which is different from W gnd Nothing to do. gnd The size of the antenna is wavelength-dependent. Optimization aims to find the optimal impedance matching dimension around half the wavelength to maximize antenna performance and efficiency. Ws1 and Ws2 are designed to broaden the antenna's bandwidth. Their lengths control the current path length in the antenna, thereby expanding the bandwidth to a certain extent. The length of (Wa1 + Wa2) determines the antenna's resonant frequency.

[0132] In some embodiments, in the millimeter-wave antenna provided in the embodiments of the present disclosure, as shown in FIG8 , the first metal portion 31, the second metal portion 32, and the third metal portion 33 are integrally formed. This allows the millimeter-wave antenna structure shown in FIG8 to be formed on a single metal sheet through an etching process, simplifying the manufacturing process.

[0133] In some embodiments, in the millimeter wave antenna provided in the embodiments of the present disclosure, as shown in FIG8 , the millimeter wave antenna 3 can be an axisymmetric structure, with the axis of symmetry L of the millimeter wave antenna 3 extending along the first direction X, and the two portions of the millimeter wave antenna 3 located on either side of the axis of symmetry L being symmetrically arranged about the axis of symmetry L. This makes the millimeter wave antenna easier to manufacture, and when integrated with the display panel 1 shown in FIG2 , it also reduces the difficulty of trenching the metal pattern in the non-display area of ​​the display panel. Furthermore, the symmetrical antenna design can improve the antenna's radiation performance. Of course, in some embodiments, the millimeter wave antenna 3 can also have an asymmetric structure.

[0134] In some embodiments, in the above-mentioned millimeter wave antenna provided in the embodiment of the present disclosure, as shown in FIG8 , the width W of the millimeter wave antenna 3 along the first direction X is (31+32+33) The length W of the first metal portion 31 along the second direction Y can be 0.3 mm to 0.45 mm. gnd It can be 4.8mm to 5.5mm. The embodiment of this disclosure is based on W (31+32+33) 0.4mm, W gnd Taking 5.2 mm as an example, a millimeter wave antenna of this size can be integrated with the display panel 1 after the metal pattern 2 shown in FIG2 is grooved.

[0135] In specific implementation, when the millimeter wave antenna shown in Figure 8 provided by the embodiment of the present disclosure is integrated with the display panel, the embodiment of the present disclosure can achieve improvement in millimeter wave antenna gain and radiation efficiency by constructing a symmetrical millimeter wave antenna fed by a coplanar waveguide on the non-display side of the screen edge without changing the existing screen process and without affecting the screen display effect, which is of great value to the design of 5G millimeter wave on-screen antennas; the embodiment of the present disclosure can construct a coplanar waveguide-fed millimeter wave antenna with a width of about 400 microns in the non-display area of ​​the screen, utilize the existing screen structure, improve the integration of the millimeter wave antenna and the display panel, and thus expand the utilization space of the millimeter wave antenna in the terminal device; the embodiment of the present disclosure uses a coplanar waveguide-fed millimeter wave antenna, which can reduce the dependence of the millimeter wave antenna on the clear area, thereby eliminating the need to increase the screen thickness; the embodiment of the present disclosure can design the millimeter wave antenna on the non-display surface of the display panel, so that the connection between the millimeter wave antenna and the RF module is simple and direct, without the need to adopt a metallized via or a bent FPC connection method. At the same time, compared with the solution of placing the antenna on the same layer of the OLED in the related art, this design scheme does not affect the actual screen film layer structure and does not need to change the manufacturing process of the existing screen; and, compared with the existing metal grid on-screen antenna, the integration scheme of the display panel and the millimeter wave antenna proposed in the embodiment of the present disclosure does not affect the screen display quality and does not cause the optical transmittance of the screen display to decrease. The gain and radiation efficiency of the millimeter wave antenna designed in the present disclosure are greatly improved compared with the metal grid on-screen antenna. At the same time, there is no need to increase the thickness of the screen, and the millimeter wave antenna and the display panel are highly integrated.

[0136] The embodiments of the present disclosure provide a display device, communication equipment, and millimeter-wave antenna that avoid the problem of the millimeter-wave antenna degrading the display quality when integrated with the screen. Furthermore, the non-display area of ​​the display panel provided by the present disclosure leaves sufficient space for the design of the millimeter-wave antenna. Therefore, by integrating a millimeter-wave antenna in the non-display area of ​​the display panel, the present disclosure utilizes the existing screen structure, improves the integration of the millimeter-wave antenna and the display panel, and thus expands the utilization space of the millimeter-wave antenna in the terminal device.

[0137] Although the preferred embodiments of the present disclosure have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present disclosure.

[0138] Obviously, those skilled in the art may make various changes and modifications to the embodiments of the present disclosure without departing from the spirit and scope of the embodiments of the present disclosure. Thus, if such changes and modifications of the embodiments of the present disclosure fall within the scope of the claims of the present disclosure and their equivalents, the present disclosure is intended to include such changes and modifications.

Claims

1. A display device, wherein, Comprising: A display panel, the display panel having a display area and a non-display area surrounding the display area, the non-display area having a metal pattern; A millimeter-wave antenna, located on one side of the non-display surface of the display panel and within the non-display area, the positive projection of the millimeter-wave antenna on the display panel being located on a side of the metal pattern away from the display area, and the width of the metal pattern within the non-display area where the millimeter-wave antenna is provided being smaller than the width of the metal pattern within other non-display areas.

2. The display device according to claim 1, wherein, An insulating structure is provided on a side of the metal pattern adjacent to the millimeter-wave antenna away from the display area, the insulating structure and the metal pattern being located in the same film layer, and the positive projection of the millimeter-wave antenna on the display panel at least covering a part of the insulating structure.

3. The display device according to claim 2, wherein, The display panel includes: a substrate substrate, and an interlayer insulating layer, a first source-drain metal layer, a passivation layer, a first planarization layer, a second source-drain metal layer, a second planarization layer, an anode layer, a pixel defining layer, a light-emitting functional layer, a cathode layer, and a packaging layer sequentially stacked on a side of the substrate substrate facing away from the millimeter-wave antenna; wherein, The first source-drain metal layer, the second source-drain metal layer, and the anode layer located in the non-display area have a common overlapping area, and the first source-drain metal layer, the second source-drain metal layer, and the anode layer are electrically connected to each other in pairs in the common overlapping area to form the metal pattern; For the metal pattern within the non-display area where the millimeter-wave antenna is provided, a side thereof away from the display area has a slot penetrating from the bottom of the first source-drain metal layer to the top of the anode layer, and the insulating structure fills the slot.

4. The display device according to claim 3, wherein, The material of the insulating structure is an organic material.

5. The display device according to any one of claims 1-4, wherein, The non-display area includes a first border area, a second border area, a third border area, and a fourth border area; the first border area and the third border area are located on one of the opposite sides of the display area, and the second border area and the fourth border area are located on the other opposite side of the display area; wherein, The first border area has a fan-out routing area, and the millimeter-wave antenna is provided in at least one of the second border area, the third border area, and the fourth border area.

6. The display device according to any one of claims 1-5, wherein, Along a first direction pointing from the display area to the non-display area, the millimeter-wave antenna includes a first metal part, a second metal part, and a third metal part electrically connected in sequence; along a second direction, the second direction being perpendicular to the first direction, the widths of the first metal part and the third metal part are both greater than the width of the second metal part, and the second metal part is located in a central area between the first metal part and the third metal part; The millimeter-wave antenna further includes a first dipole slot and a second dipole slot arranged along the second direction; The first dipole slot includes a first slot and a second slot, the first slot being located inside the third metal part and extending along the second direction, and the second slot extending along the first direction and penetrating the first metal part and the second metal part and connecting to the first slot within the third metal part; The second dipole slot includes a third slot and a fourth slot, the third slot is located inside the third metal part and extends along the second direction, the fourth slot extends along the first direction and penetrates the first metal part and the second metal part and is connected to the third slot inside the third metal part.

7. The display device according to claim 6, wherein, The portion between the first dipole slot and the second dipole slot constitutes a coplanar waveguide signal line, the portion of the first metal portion located at the first dipole slot away from the second dipole slot constitutes a first coplanar waveguide metal ground, and the portion of the first metal portion located at the second dipole slot away from the first dipole slot constitutes a second coplanar waveguide metal ground.

8. The display device according to claim 7, wherein, The first metal part, the second metal part and the third metal part are an integrated structure.

9. The display device according to claim 8, wherein, The millimeter wave antenna is an axisymmetric figure, the symmetry axis of the millimeter wave antenna extends along the first direction, and two parts of the millimeter wave antenna located on both sides of the symmetry axis are symmetrically arranged about the symmetry axis.

10. The display device according to claim 9, wherein, The width of the millimeter wave antenna along the first direction is 0.3 mm to 0.45 mm, and the length of the first metal part along the second direction is 4.8 mm to 5.5 mm.

11. The display device according to any one of claims 7-10, wherein, It also includes a feeding network structure for feeding the millimeter wave antenna, and the feeding network structure is located on the side of the first metal part away from the third metal part; the feeding network structure includes: a coplanar waveguide feeding line electrically connected to the coplanar waveguide signal line, a first coplanar waveguide grounding structure electrically connected to the first coplanar waveguide metal ground, and a second coplanar waveguide grounding structure electrically connected to the second coplanar waveguide metal ground.

12. The display device according to claim 11, wherein, The orthographic projection of the feeding network structure on the display panel covers part of the non-display area and part of the display area.

13. The display device according to claim 12, wherein, The width of the coplanar waveguide feed line is greater than the width of the coplanar waveguide signal line, the distance between the coplanar waveguide feed line and the first coplanar waveguide grounding structure is less than the width of the first dipole slot, and the distance between the coplanar waveguide feed line and the second coplanar waveguide grounding structure is less than the width of the inverted second dipole slot.

14. The display device according to claim 13, wherein, The coplanar waveguide feeding line and the coplanar waveguide signal line are an integrated structure, the first coplanar waveguide metal ground and the first coplanar waveguide grounding structure are an integrated structure, and the second coplanar waveguide metal ground and the second coplanar waveguide grounding structure are an integrated structure.

15. The display device according to any one of claims 11-14, wherein, It also includes: a flexible circuit board located on the side of the millimeter wave antenna away from the display panel, and a substrate located between the millimeter wave antenna and the flexible circuit board; the flexible circuit board has a radio frequency module, and the feeding network structure is electrically connected to the radio frequency module.

16. The display device according to claim 15, wherein, The feeding network structure is bent to the back side of the substrate through a flexible connection portion and is electrically connected to the radio frequency module.

17. The display device according to claim 15, wherein, A reflective plate is also included between the substrate and the flexible circuit board.

18. The display device according to claim 17, wherein, The thickness of the substrate is 100 μm to 250 μm.

19. The display device according to any one of claims 6-18, wherein, The number of the millimeter wave antennas is at least two, and the millimeter wave antennas are arranged in a straight line along the second direction.

20. The display device according to claim 19, wherein, The adjacent coplanar waveguide metal grounds of two adjacent millimeter wave antennas are an integrated structure.

21. A communication device, wherein, Comprising a display device according to any one of claims 1-20.

22. A millimeter-wave antenna, wherein, The millimeter-wave antenna is for integration with a display panel. The millimeter-wave antenna includes a first metal part, a second metal part, and a third metal part that are electrically connected in sequence along a first direction. Along a second direction, the second direction being perpendicular to the first direction, the widths of the first metal part and the third metal part are both greater than the width of the second metal part, and the second metal part is located in the central region between the first metal part and the third metal part. The millimeter-wave antenna further includes a first dipole slot and a second dipole slot arranged along the second direction. The first dipole slot includes a first slot and a second slot. The first slot is located inside the third metal part and extends along the second direction. The second slot extends along the first direction and penetrates the first metal part and the second metal part and is connected to the first slot inside the third metal part. The second dipole slot includes a third slot and a fourth slot. The third slot is located inside the third metal part and extends along the second direction. The fourth slot extends along the first direction and penetrates the first metal part and the second metal part and is connected to the third slot inside the third metal part.

23. The millimeter-wave antenna according to claim 22, wherein, The part between the first dipole slot and the second dipole slot constitutes a coplanar waveguide signal line. The part of the first metal part located away from the second dipole slot of the first dipole slot constitutes a first coplanar waveguide ground plane. The part of the first metal part located away from the first dipole slot of the second dipole slot constitutes a second coplanar waveguide ground plane.

24. The millimeter-wave antenna according to claim 23, wherein, The first metal part, the second metal part, and the third metal part are of an integral structure.

25. The millimeter-wave antenna according to claim 24, wherein The millimeter-wave antenna is an axisymmetric figure. The axis of symmetry of the millimeter-wave antenna extends along the first direction. The two parts of the millimeter-wave antenna on both sides of the axis of symmetry are symmetrically arranged with respect to the axis of symmetry.

26. The millimeter-wave antenna according to claim 25, wherein, The width of the millimeter-wave antenna along the first direction is 0.3 mm to 0.45 mm, and the length of the first metal part along the second direction is 4.8 mm to 5.5 mm.

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