A kind of smart glasses

Abstract

The present invention provides a kind of smart glasses, including a glasses body and a MIMO antenna group, wherein the glasses body includes a first frame, a second frame and a nose support bracket connecting the first frame and the second frame, and the MIMO antenna group includes a first loop antenna, a second loop antenna and a decoupling branch, the first loop antenna is arranged along the first frame, the second loop antenna is arranged along the second frame, and the decoupling branch is arranged at the nose support bracket and connected to the two loop antennas. Thanks to the symmetrical structure of the glasses, the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose support bracket, and then by arranging the decoupling branch at the nose support bracket, and connecting the first loop antenna and the second loop antenna through the decoupling branch, the first loop antenna and the second loop antenna can be effectively decoupled, which solves the problem that the antenna performance of the smart glasses is poor due to the mutual coupling of the antennas in the MIMO antenna of the existing smart glasses.

Description

Technical Field

[0001] The present invention relates to the technical field of wearable mobile communications, and in particular to smart glasses. Background Art

[0002] With the development of mobile communication technology, more and more products are being electronicized and given mobile communication functions. For example, wearable mobile communication devices such as smart watches and smart glasses are gradually replacing traditional watches and glasses.

[0003] Smart glasses are a general term for wearable glasses that have an independent operating system like a smartphone and can realize various functions by installing software. They are easy to use and small in size. At present, smart glasses can complete functions such as calls, videos, navigation, uploading and downloading through voice or motion control. In order to realize the mobile communication function of smart glasses, antennas must be used as the radiation carrier of radio frequency signals. Therefore, the design of antennas is an important part of the structural design of smart glasses, which directly affects the quality of the wireless communication function of smart glasses.

[0004] In the existing structure design of smart glasses, the circuit board is usually set in one of the temples of the smart glasses, and the antenna is arranged around the circuit board. This arrangement is limited by the size of the smart glasses themselves, and the size and clearance area of ​​the antenna itself are small, so the working bandwidth and radiation efficiency of the antenna are not ideal.

[0005] In order to solve the problem of unsatisfactory working bandwidth and radiation efficiency caused by the antenna structure design in existing smart glasses, researchers have found that MIMO (multiple input multiple output) antennas can be used to solve the problem. However, although MIMO antennas can effectively improve the performance of wireless communication systems by utilizing the characteristics of multipath, due to the small size of smart glasses, there is mutual coupling between antennas. Therefore, how to reduce the mutual coupling between antennas has become the key point to improve the performance of smart glasses antennas.

[0006] Existing methods for decoupling MIMO antennas mainly include parasitic element decoupling, matching circuit decoupling and floor printing seam decoupling, which are decoupling structures added outside the antenna structure. For smart glasses, such decoupling structures are too large, and due to the special structure of smart glasses, some decoupling structures are not applicable. Summary of the invention

[0007] The object of the present invention is to provide a smart glasses to at least solve the problem that the antenna performance of the smart glasses is poor due to mutual coupling among the MIMO antennas of the existing smart glasses.

[0008] In order to solve the above technical problems, the present invention provides a pair of smart glasses, comprising a pair of glasses body and a MIMO antenna group;

[0009] The glasses body comprises a first frame, a second frame and a nose pad bracket, and the first frame and the second frame are symmetrically connected and fixed by the nose pad bracket;

[0010] The MIMO antenna group includes a first loop antenna, a second loop antenna and a decoupling branch; the first loop antenna is arranged in the first frame along the first frame alignment, the second loop antenna is arranged in the second frame along the second frame alignment, the decoupling branch is arranged in the nose pad bracket and is electrically connected to the first loop antenna and the second loop antenna, and the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose pad bracket.

[0011] Optionally, in the smart glasses, the glasses body further comprises a first temple and a second temple, the first temple being movably connected to a side of the first frame away from the nose pad bracket; the second temple being movably connected to a side of the second frame away from the nose pad bracket;

[0012] The first loop antenna has a first opening, and a first feeding point and a first location are respectively arranged at two ends of the first opening, and the first feeding point and the first location are respectively arranged at one end of the first temple close to the first frame; the second loop antenna has a second opening, and a second feeding point and a second location are respectively arranged at two ends of the second opening, and the second feeding point and the second location are respectively arranged at one end of the second temple close to the second frame.

[0013] Optionally, in the smart glasses, the MIMO antenna group also includes a first monopole antenna and a second monopole antenna; the first monopole antenna is arranged in the first temple, and a third feeding point is arranged at one end of the first monopole antenna close to the first loop antenna; the second monopole antenna is arranged in the second temple, and a fourth feeding point is arranged at one end of the second monopole antenna close to the second loop antenna.

[0014] Optionally, in the smart glasses, the smart glasses also include a circuit main board, the circuit main board includes a first main board and a second main board, the first main board is arranged in the first temple and is electrically connected to the first feeding point, the first location and the third feeding point, respectively, the second main board is arranged in the second temple and is electrically connected to the second feeding point, the second location and the fourth feeding point, respectively.

[0015] Optionally, in the smart glasses, the frame width of the glasses body is not less than 4 mm, and the routing width of the MIMO antenna group is 0.4 to 4 mm.

[0016] Optionally, in the smart glasses, the thickness of the glasses body is not less than 3 mm, and the routing thickness of the MIMO antenna group is 0.524 to 2.2 mm.

[0017] Optionally, in the smart glasses, the width of the decoupling branch is smaller than the width of the nose pad bracket, and the length is 20 to 30 mm.

[0018] Optionally, in the smart glasses, the relative dielectric constant of the glasses body is 2-4.

[0019] The present invention provides a kind of smart glasses, including a glasses body and a MIMO antenna group, wherein the glasses body includes a first frame, a second frame and a nose support bracket connecting the first frame and the second frame, and the MIMO antenna group includes a first loop antenna, a second loop antenna and a decoupling branch, the first loop antenna is arranged along the first frame, the second loop antenna is arranged along the second frame, and the decoupling branch is arranged at the nose support bracket and connected to the two loop antennas. Thanks to the symmetrical structure of the glasses, the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose support bracket, and then by arranging the decoupling branch at the nose support bracket, and connecting the first loop antenna and the second loop antenna through the decoupling branch, the first loop antenna and the second loop antenna can be effectively decoupled, which solves the problem that the antenna performance of the smart glasses is poor due to the mutual coupling of the antennas in the MIMO antenna of the existing smart glasses. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the smart glasses provided in this embodiment;

[0021] Figure 2 A schematic diagram of the dimensions of the smart glasses provided in this embodiment;

[0022] Figure 3 MIMO antenna group test and simulated return loss diagram in the smart glasses provided in this embodiment;

[0023] The descriptions of the reference numerals are as follows:

[0024] 100-glasses body; 110-first frame; 120-second frame; 130-nose support; 140-second temple;

[0025] 200 - MIMO antenna group; 210 - first loop antenna; 220 - second loop antenna; 221 - second feeding point; 222 - second location; 230 - decoupling branch; 240 - second monopole antenna; 241 - fourth location. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the smart glasses proposed in the present invention in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the accompanying drawings is often a part of the actual structure. In particular, the emphasis of each accompanying drawing is different, and sometimes different proportions are used.

[0027] It should be noted that the terms "first", "second", etc. in the specification, claims and drawings of the present invention are used to distinguish similar objects in order to describe the embodiments of the present invention, rather than to describe a specific order or sequence. It should be understood that the structures used in this way can be interchanged under appropriate circumstances. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] This embodiment provides a smart glasses, such as Figure 1 As shown, the smart glasses include a glasses body 100 and a MIMO antenna group 200; the glasses body 100 includes a first frame 110, a second frame 120 and a nose pad bracket 130, and the first frame 110 and the second frame 120 are symmetrically connected and fixed through the nose pad bracket 130; the MIMO antenna group 200 includes a first loop antenna 210, a second loop antenna 220 and a decoupling branch 230; the first loop antenna 210 is arranged in the first frame 110 along the first frame 110, and the second loop antenna 220 is arranged in the second frame 120 along the second frame 120, and the decoupling branch 230 is set in the nose pad bracket 130 and is electrically connected to the first loop antenna 210 and the second loop antenna 220, and the first loop antenna 210 and the second loop antenna 220 are symmetrical along the central axis of the length direction of the nose pad bracket 130.

[0029] The smart glasses provided by the present invention benefit from the symmetrical structure of the glasses, so that the first loop antenna 210 and the second loop antenna 220 are symmetrical along the central axis of the length direction of the nose pad bracket 130, and then by providing a decoupling branch 230 at the nose pad bracket 130, and connecting the first loop antenna 210 and the second loop antenna 220 through the decoupling branch 230, effective decoupling can be achieved between the first loop antenna 210 and the second loop antenna 220, thereby solving the problem of poor antenna performance of the smart glasses caused by mutual coupling of the antennas in the MIMO antenna of the existing smart glasses.

[0030] Continue to see Figure 1 In the smart glasses provided in this embodiment, the glasses body 100 also includes a first temple (not shown in the figure) and a second temple 140, the first temple is movably connected to the side of the first frame 110 away from the nose pad bracket 130; the second temple 140 is movably connected to the side of the second frame 120 away from the nose pad bracket 130; the first loop antenna 210 has a first opening, and the two ends of the first opening are respectively provided with a first feeding point (not shown in the figure) and a first location (not shown in the figure), and the first feeding point and the first location are respectively arranged at one end of the first temple close to the first frame 110; the second loop antenna 220 has a second opening, and the two ends of the second opening are respectively provided with a second feeding point 221 and a second location 222, and the second feeding point 221 and the second location 222 are respectively arranged at one end of the second temple 140 close to the second frame 120.

[0031] In addition, in the smart glasses provided in this embodiment, the smart glasses also include a circuit main board (not shown in the figure), and the circuit main board includes a first main board and a second main board, the first main board is arranged in the first temple and is electrically connected to the first feeding point and the first location respectively, and the second main board is arranged in the second temple and is electrically connected to the second feeding point and the second location respectively. In this way, the signal receiving and transmitting function of the antenna can be realized. Usually, other components such as LC circuits are arranged on the circuit main board to improve the performance of the antenna. The design of the circuit, the selection of components, etc. are all well known to those skilled in the art and will not be repeated here.

[0032] In order to further improve the performance of the MIMO antenna group in the smart antenna, in this embodiment, the MIMO antenna group 200 further includes a first monopole antenna (not shown in the figure) and a second monopole antenna 240; the first monopole antenna is arranged in the first temple, and a third feeding point is arranged at one end of the first monopole antenna close to the first loop antenna; the second monopole antenna 240 is arranged in the second temple 140, and a fourth feeding point 241 is arranged at one end of the second monopole antenna 240 close to the second loop antenna 220. At the same time, in order to realize the transceiver function of the monopole antenna, the first monopole antenna is connected to the first mainboard circuit, and the second monopole antenna is connected to the second mainboard circuit.

[0033] The smart glasses provided by the present invention are further described below with reference to a specific embodiment. As shown in 2, the glasses body 100 used in this embodiment is a conventional square-frame glasses, wherein the inner frame size of the first frame 110 and the second frame 120 is 40×60 mm, the length of the nose pad bracket is 20 mm, and the length of the first temple and the second temple is 110 mm.

[0034] Continue to see Figure 2 , the frame width of the entire glasses body 100 is not less than 4mm, and the routing width of the MIMO antenna group 200 is 0.4~4mm. The thickness of the glasses body 100 is not less than 3mm, the routing thickness of the MIMO antenna group 200 is 0.524~2.2mm, and the thickness of the circuit main board PCB is 0.254~2mm. This not only allows the MIMO antenna group 200 and the circuit main board to be better hidden in the glasses body 100, but also facilitates the layout and routing of the MIMO antenna group 200. In this embodiment, the frame width of the glasses body 100 is preferably 4mm and the thickness is 4mm.

[0035] Furthermore, for the sake of aesthetics, the decoupling branch 230 can be better hidden in the nose support bracket 130, and the width of the decoupling branch 230 is smaller than the width of the nose support bracket 130, and the length is 20 to 30 mm. In this embodiment, the width of the decoupling branch 230 is preferably 2 mm. When the length of the decoupling branch 230 is consistent with the length of the nose support bracket 130, the decoupling branch 230 is connected to the first loop antenna 110 and the second loop antenna 120 in a straight line; when the length of the decoupling branch 230 is greater than the length of the nose support bracket 130, the decoupling branch 230 can be connected to the first loop antenna 110 and the second loop antenna 120 in a curved shape, and at this time, the decoupling branch 230 can further improve the isolation of the antenna.

[0036] In addition, in order to avoid problems such as the glasses body interfering with the signal of the antenna, it is recommended that the glasses body be made of non-conductive material, such as plastic or resin. Preferably, the relative dielectric constant of the glasses body is 2-4.

[0037] The smart glasses provided in this embodiment are used to perform simulation tests, and the results of the MIMO antenna group test and the simulated return loss are as follows: Figure 3 As shown. Figure 3 It can be seen that due to symmetry, the reflection coefficient index is less than -10dB in the range of 3.3-3.6GHz. The isolation index is less than 15dB. It achieves good MIMO antenna performance.

[0038] In summary, the smart glasses provided in this embodiment include a glasses body and a MIMO antenna group; the glasses body includes a first frame, a second frame and a nose support, and the first frame and the second frame are symmetrically connected and fixed through the nose support; the MIMO antenna group includes a first loop antenna, a second loop antenna and a decoupling branch; the first loop antenna is arranged in the first frame along the first frame alignment, the second loop antenna is arranged in the second frame along the second frame alignment, the decoupling branch is arranged in the nose support and electrically connected to the first loop antenna and the second loop antenna, and the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose support. Thanks to the symmetrical structure of the glasses, the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose support, and then by setting a decoupling branch at the nose support, and connecting the first loop antenna and the second loop antenna through the decoupling branch, the first loop antenna and the second loop antenna can be effectively decoupled, which solves the problem that the antenna performance of the smart glasses is poor due to the mutual coupling of the antennas in the MIMO antenna of the existing smart glasses.

[0039] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A smart glasses, characterized in that: The smart glasses include a glasses body and a MIMO antenna group; The glasses body comprises a first frame, a second frame and a nose pad bracket, and the first frame and the second frame are symmetrically connected and fixed by the nose pad bracket; The MIMO antenna group includes a first loop antenna, a second loop antenna and a decoupling branch; the first loop antenna is arranged in the first frame along the first frame alignment, the second loop antenna is arranged in the second frame along the second frame alignment, the decoupling branch is arranged in the nose pad bracket and is electrically connected to the first loop antenna and the second loop antenna, the first loop antenna and the second loop antenna are symmetrical along the central axis of the length direction of the nose pad bracket; the glasses body also includes a first temple and a second temple, the first temple is movably connected to a side of the first frame away from the nose pad bracket; the second temple is movably connected to a side of the second frame away from the nose pad bracket; The first loop antenna has a first opening, and a first feeding point and a first location are respectively provided at two ends of the first opening, and the first feeding point and the first location are respectively provided at one end of the first temple close to the first frame; the second loop antenna has a second opening, and a second feeding point and a second location are respectively provided at two ends of the second opening, and the second feeding point and the second location are respectively provided at one end of the second temple close to the second frame; the MIMO antenna group also includes a first monopole antenna and a second monopole antenna; the first monopole antenna is provided in the first temple, and a third feeding point is provided at one end of the first monopole antenna close to the first loop antenna; the second monopole antenna is provided in the second temple, and a fourth feeding point is provided at one end of the second monopole antenna close to the second loop antenna.

2. The smart glasses according to claim 1, characterized in that: The smart glasses also include a circuit main board, which includes a first main board and a second main board. The first main board is arranged in the first temple and is electrically connected to the first feeding point, the first location and the third feeding point respectively. The second main board is arranged in the second temple and is electrically connected to the second feeding point, the second location and the fourth feeding point respectively.

3. The smart glasses according to claim 1, characterized in that: The frame width of the glasses body is not less than 4 mm, and the routing width of the MIMO antenna group is 0.4-4 mm.

4. The smart glasses according to claim 1, characterized in that: The thickness of the glasses body is not less than 3 mm, and the wiring thickness of the MIMO antenna group is 0.524-2.2 mm.

5. The smart glasses according to claim 1, characterized in that: The width of the decoupling branch is smaller than the width of the nose support bracket, and the length is 20 to 30 mm.

6. The smart glasses according to claim 1, characterized in that: The relative dielectric constant of the eyeglass body is 2-4.

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