An antenna device for glass style device of ar or VR and glass style device including the same
Patent Information
- Application Number
- PCT/CN2025/089286
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-04-16
- Publication Date
- 2026-10-22
Smart Images

Figure CN2025089286_22102026_PF_FP_ABST
Abstract
Description
AN ANTENNA DEVICE FOR GLASS STYLE DEVICE OF AR OR VR AND GLASS STYLE DEVICE INCLUDING THE SAMEFIELD OF THE INVENTION
[0001] This disclosure relates to the technical field of antenna technology, and more specifically, to an antenna device for a glass style device of an augmented reality or mixed reality device, and a glass style device of an augmented reality or mixed reality device.BACKGROUND OF THE INVENTION
[0002] To access with Wi-Fi or Bluetooth is necessary for glass style devices in which has Augmented reality (AR) feature or Mixed reality (MR) feature.
[0003] By using an AR technology, a digital content such as images, animations, or 3D objects can be overlaid onto the real world through devices such AR glasses, smartphones, or tablets.
[0004] MR technology blends the physical and digital worlds where digital objects not only are overlaid but also can interact with the real-world environment in real-time. The digital elements are spatially aware and can respond to physical objects or environments, allowing for more immersive and interactive experiences.
[0005] Normally, AR device is used for lightweight, accessible experiences while MR is used for immersive, high-fidelity applications that require real-world interaction. In both AR and MR technology, a glass style device is a good choice for providing such a function.
[0006] Generally, an antenna element is put in the housing in which temples or lims of the glass style device are hosted. Currently miniaturization of glass style electric devices such as AR / MR glasses has been proceeding. These devices become multi-functional and high-performance. It means getting increasing number of electric parts or sensors should incorporated. It can also cause rise in temperature of the devices. Thus, there are many components for thermal countermeasure inside of Temples or Lims.
[0007] FIG. 1 shows the structure of a pair of glasses. The glasses include a pair of lenses 1, corresponding lims 2 and temples 3. It can be seen from FIG. 1 that the housing areas in the lims 2 and the temples 3 are limited.
[0008] These wearable devices should secure an antenna performance when state of wearing such devices by a user is continuously changing. The composition of the human body is considered as loss-dielectric, and it will impact on the antenna performance. It is also one limitation of antenna layout for wearable devices. For example, it is better for antenna performance when antenna element is placed away from human head as far as possible. From these facts, situation of antenna layout in AR / MR glasses is getting worth. Therefore, a new antenna layout shall be considered.SUMMARY OF THE INVENTION
[0009] One object of this disclosure is to provide a new technical solution for a new solution for an antenna for a glass style device of an AR or MR device.
[0010] According to a first aspect of the present disclosure, there is provided an antenna device for a glass style device of an augmented reality or mixed reality device, including: at least two separate antenna elements, including a ground element and a feeding element which are separate from each other, wherein both the ground element and the feeding element are located out of a core area of Field of View; and at least two signal paths, including a first signal path and a second signal path which are connected to the ground element and the feeding element, respectively, wherein at least one of the ground element and the feeding element are designed for being mounted around a side wall of lens of the glass style device.
[0011] According to a second aspect of the present disclosure, there is provided a glass style device of an augmented reality or mixed reality device including an antenna device according to an embodiment. According to an embodiment of this disclosure, a new layout for antenna of an AR or MR glasses style device is proposed to improve the performance or space usage efficiency of the glass style device or the display imaging quality.
[0012] Further features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments according to the present disclosure with reference to the attached drawings.BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with the description thereof, serve to explain the principles of the invention.
[0014] FIG. 1 is a schematic diagram showing a structure of a pair of glasses which can be used in various embodiments.
[0015] FIG. 2 is a schematic diagram showing an antenna of an AR or MR glass style device with an antenna.
[0016] FIG. 3 is a schematic diagram showing layers of a lens of an AR or MR glass style device with an antenna.
[0017] FIG. 4 is a schematic diagram showing connections of antenna elements.
[0018] FIG. 5 is a schematic diagram showing an example of a coaxial cable.
[0019] FIG. 6 is a schematic diagram showing total internal reflection.
[0020] FIG. 7 is a schematic diagram showing light paths in an AR / MR lens.
[0021] FIG. 8 is a schematic diagram showing an example of AR / MR device showing a picture on an AR / MR glass style device.
[0022] FIG. 9 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to an embodiment.
[0023] FIG. 10 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment.
[0024] FIG. 11 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment.
[0025] FIG. 12 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment.
[0026] FIG. 13 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment.
[0027] FIG. 14 is a schematic diagram showing a contact part of an example according to an embodiment.
[0028] FIG. 15 is a schematic diagram showing contact parts in an antenna for an AR / MR lens according to another embodiment.
[0029] FIG. 16 is a schematic top view of contact parts mounted in an antenna for an AR / MR lens according to another embodiment.
[0030] FIG. 17 is a schematic diagram showing contact parts mounted on a PCB according to another embodiment.
[0031] FIG. 18 is a schematic side view of contact parts mounted in an antenna for an AR / MR lens according to another embodiment.
[0032] DETAILED DESCRIPTION OF THE EMBODIMENTS
[0033] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless it is specifically stated otherwise.
[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
[0035] Techniques, methods and apparatus as known by one of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
[0036] In all of the examples illustrated and discussed herein, any specific values should be interpreted to be illustrative only and non-limiting. Thus, other examples of the exemplary embodiments could have different values.
[0037] Notice that similar reference numerals and letters refer to similar items in the following figures, and thus once an item is defined in one figure, it is possible that it need not be further discussed for following figures.
[0038] In an embodiment, an antenna device for a glass style device of an augmented reality or mixed reality device includes: at least two separate antenna elements, including a ground element and a feeding element which are separate from each other, wherein both the ground element and the feeding element are located out of a core area of Field of View; and at least two signal paths, including a first signal path and a second signal path which are connected to the ground element and the feeding element, respectively. The ground element and the feeding element are designed for being mounted around a side wall of lens of the glass style device.
[0039] In this embodiment, because the elements of the antenna are separate, they can be placed independently and separately so as to maximum the usage of space in the glasses. This is beneficial in the limited space of the glasses. It gives more freedom of design to a designer.
[0040] In another embodiment, the feeding element is a non-transparent element and is designed for being amount on a surface of the lens. For example, the transparency of the non-transparent element is lower than 50%.
[0041] The core area of Field of View is an area in a glass which has a major impact on the viewing feeling of a viewer. When an element is placed out of the core area, it will not have much impact on the viewing feeling of a viewer. For example, the core area is the centre area of the glass and the element is placed at an edge area of the glass, which is out of the core area. The area out of the core area may an area outside the designed view area of a glasses. In an example, the core area may be the out-coupling area of an VR / AR / MR glasses.
[0042] In an example, the ground element is formed in strip-like shape and is designed for being mounted around the lens. For example, the first signal path is an outer-conductor of a coaxial cable and the second signal path is an inner -conductor of the coaxial cable, the ground element is connected to the outer-conductor of the coaxial cable and the feeding element is connected to the inner conductor of the coaxial cable.
[0043] In another embodiment, the feeding element is directly formed on a surface of the lens by ink-jet printing. In an example, the antenna device further includes a connection element, which is placed onto at least one part of the feeding element and connects the feeding element to the second signal path.
[0044] In another embodiment, the ground element is formed as at least one part of a lens bracket for the glass style device.
[0045] The first signal path and the second signal path are used for feeding signals to or receiving from the ground element and the feeding element. The ground element and the feeding element are used for transmitting electromagnetic signals to the air or receiving electromagnetic signals from the air. The first signal path and the second signal path work together for the signal transmission. Various elements or components, such as coaxial cable, printed circuits, micro-strip, strip-line and so on, can be used for the first signal path and the second signal path. In another embodiment, the first signal path includes a first printed line on a printed circuit board or a flexible printed circuit, a first contact part mounted on the printed circuit board or the flexible printed circuits for connecting the first printed line and the ground element, and an outer-conductor of a coaxial cable connected to the first printed line. The second signal path includes a second printed line on the printed circuit board or the flexible printed circuit, a second contact part mounted on the printed circuit board or the flexible printed circuits for connecting the second printed line and the feeding element, and an inner-conductor of the coaxial cable connected to the second printed line.
[0046] In various embodiment, the signal paths may include various components for transmitting the signal from the antenna to a processing unit.
[0047] FIG. 2 is a schematic diagram showing an antenna of an AR or MR glass style device with an antenna. As shown in FIG. 2, the antenna 25 includes a transparent base substrate 23, a feeding element 21 of the antenna 25 and a ground element 22 of the antenna 25. The feeding element 21 may include mesh portion 24.
[0048] The antenna 25 is called as a transparent antenna and is built on transparent parts of a glass style device such as lenses of the glass style device. As shown in FIG. 2, the radius of ground element 22 will be as large as possible for optimal antenna performance. In FIG. 2, the ground element 22 is formed along outline of the base substrate 23 which has the same size as that of the lens outline for fully utilizing the footprint of the lens.
[0049] The material of the antenna 25 may include conductive material such as copper. In FIG. 2, the feeding element 21 has mesh portion 24 which is composed of fine lines. The width of the fine lines is less than 10μm, so that the feeding element 21 is invisible to a user.
[0050] FIG. 3 is a schematic diagram showing layers of a lens of an AR or MR glass style device with an antenna. As shown in FIG. 3, the transparent antenna 25 is laminated on a lens 26 of an AR / MR glass style device.
[0051] The material of the base substrate of the antenna 25 may include PET, PI or PC, which are transparent for high-transparency requirement.
[0052] The transparent antenna 25 is laminated on the lens 26 of the glass style device, or is laminated between lenses if the glass style device is composed of several lens, by OCA (optical clear adhesive) tape or glue.
[0053] FIG. 4 is a schematic diagram showing connections of antenna elements. The antenna elements of the transparent antenna are connected to an RF circuit of the glass style device by a coaxial cable. The coaxial cable has an inner-conductor and an outer-conductor. The transparent antenna with lens can be assembled in a lim. The RF circuit may be built on main-board in a housing of the temple.
[0054] As shown in FIG. 4, a feeding element 31 of an antenna is connected to an inner conductor of a coaxial cable 33, and a ground element 32 of the antenna is connected to an outer-conductor of the coaxial cable 33. The
[0055] FIG. 5 is a schematic diagram showing an example of a coaxial cable. As shown in FIG. 5, the coaxial cable includes an outer-conductor 331, an inner conductor 332, an outer insulation layer 333 and a dielectric insulator 334 between the outer-conductor 331 and the inner conductor 332.
[0056] The feeding element 31 and the ground element 32 may be soldered to the inner conductor 332 and the outer-conductor 331, respectively.
[0057] The structure of the coaxial cable can efficiently transmit high-frequency electrical signals while minimizing loss and interference, which will be more suitable for the antenna of a glass style device. Generally, the inner conductor carries an electrical signal received from an outside device. The inner conductor is usually made of solid copper or stranded copper wires for conductivity. Sometimes, the inner conductor 332 is plated with materials such as silver for enhanced performance to efficiently transmit signals to or from a feeding element of an antenna.
[0058] The dielectric insulator 334 surrounds the inner conductor 332 to maintain separation and ensure signal integrity. The materials of the dielectric insulator 334 may be polyethylene, foam, or Teflon.
[0059] The outer conductor 331 is for connection with a ground element of an antenna and may also function to shield electromagnetic interference. The outer conductor 331 can be a braided wire mesh, metallic foil, or a combination of both. It may be made from materials such as aluminum or copper.
[0060] The outer insulation layer 333 protects the cable from physical damage, moisture, and environmental factors. It may be made of durable plastic materials such as PVC or polyethylene.
[0061] FIG. 6 is a schematic diagram showing total internal reflection. As shown in FIG. 6, a display engine 42 is coupled with a waveguide 41. An image generated by the display engine 42 is fed into the waveguide 41. The waveguide 41 guides lights of the image to its output portion and outputs the image to a human eye 46. Inside the waveguide 41, light of the image is totally reflected to the output portion as indicated by the references sign 43. The lens of the glass style device functions as the waveguide 41.
[0062] FIG. 7 is a schematic diagram showing light paths in an AR / MR lens. As shown in FIG. 7, a transparent antenna 44 is laminated with the waveguide 41. As indicated by the reference sign 45 in FIG. 7, because of the transparent antenna 44, the lights of the image generated by the display engine 42 are not totally reflected inside the waveguide 41 and some of the lights leak from the waveguide to the transparent antenna 44 and further leak to the outside.
[0063] In the prior art, a transparent antenna for an AR / MR glass style device covers the whole lens surface of the glass style device. The base substrate of the antenna will exist on the whole surface of the lens even if there is no antenna element.
[0064] A glass style device in which has AR / MR features has image displays on both or either side of the lens of the glass style device. In the AR / MR devices, the imagery display is not put directly in front of a viewer’s eyes. This kind of device uses a transparent component, which transmits light from the outside to allow the user to have a direct view of the real world. It includes a channel of display-engine-waveguide-output from the edge to the center of the lens, and it redirects the imagery display at the output towards the viewer’s eye. As such, a computer-generated imagery display is overlaid on the real world’s view and is displayed to the viewer’s eye. The waveguide may be a planar waveguide, which is like a tiny, transparent channel that guides light from a display-engine to the viewer’s eyes. The waveguide constrains the imagery light within itself by using the phenomenon of total-internal-reflection. Total-internal-reflection occurs when light goes from a denser material into a less dense medium like air. Pasting a transparent base substrate on the waveguide will change a less dense medium condition. It reduces total reflectivity. As a result, it may cause a degradation of display imaging quality. In this disclosure, the feeding element is separate from the ground element and takes a relatively small area. It will have less impact on the transmission of light in such a waveguide of the glasses, even if the feeding element is not a transparent element. Furthermore, the feeding element is usually not placed in the middle of a lens of the glasses, it will not block or blur the view of a user wearing such glasses.
[0065] In the prior art, transparent and thin material is used for the base substrate. The transmittance of the base substrate is around 90%. In addition, in a traditional glass style device, OCA may be used for lamination between a transparent antenna and a lens. The transmittance of OCA is around 90%, too. Thus, the transmittance of field of view is further decreased.
[0066] FIG. 8 is a schematic diagram showing an example of AR / MR system showing a picture on an AR / MR glass style device. As shown in FIG. 8, the lights of the image generated by the display engine 45 are coupled into the waveguide 48 by an in-coupler 46 and are guided by the waveguide 48 from the in-coupler 46 at the edge of the lens to the out-coupler 47 at the center of the lens. The out-coupler 47 directs the image lights towards a viewer’s eye.
[0067] In this embodiment, the AR / MR system includes the AR / MR glass style device, and the AR / MR glass style device includes an antenna device according to various embodiment.
[0068] FIG. 9 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to an embodiment. FIG. 9 shows an antenna member 50 and a lens 51 of a glass style device. The antenna member 50 includes a ground element 501 and a feeding element 502. The ground element 501 in FIG. 9 can be provided in strip shape. The ground element 501 can be bent into curve to fit the side wall of a lens 51 of a glass style device when being mounted around the side wall. The ground element 501 is mounted around the lens 51 by adhesive tape and so on. In an example, the ground element 501 is formed by a strip shape flexible printed circuit (FPC) . In the FPC, a strip shape electrode is formed on a strip shape base film. The width of the electrode is narrower than that of the base film so that two strips without being covered by the electrode are formed on the two sides of electrode on the base film. The feeding element 502 can be mounted on a surface of the lens 51, for example, by adhesive tape or OCA and so on. The base film of the FPC can have a blank area which is not covered by the electrode of the ground element. The connection part of the feeding element 502 can be positioned at the blank area.
[0069] In various embodiments, the antenna elements such as feeding element, ground element and so on are divided into several parts. The obstruction affecting viewing quality is reduced by removing antenna film in a viewing area. Alternatively, the implementations in various embodiments can be cost saving.
[0070] The feeding element, also known as radiation portion, of the antenna is the part that radiates electromagnetic waves into space when transmitting and receives electromagnetic waves when functioning as a receiver. It is the primary component responsible for converting electrical signals into electromagnetic radiation and vice versa. The feeding element generates or collects electromagnetic waves, enabling wireless communication. It may define the directionality of the signal, influencing range and coverage and determines the orientation of the electric field, which will match the polarization of the receiving antenna for optimal signal strength. The feeding element may include conductors or slit / slot between conductors.
[0071] The ground element of an antenna, also known as the ground plane, is a conductive surface or structure that serves as a reference point for the electromagnetic waves radiated by the antenna. It can provide a return path for currents, stabilizing impedance, and shaping the radiation pattern. It completes the electrical circuit by providing a return path for currents flowing through the antenna elements. For example, the ground element may reflect the radiated waves, effectively creating a virtual image of the antenna element. This enhances gain and directs the radiation pattern. The ground element may also help prevent radiation from the feeding element, ensuring that only the intended radiation portion emits electromagnetic waves.
[0072] In various embodiments, the ground element is compact to fit the slim profile of the AR / VR glass style device. The material of the ground element shall be lightweight and conductive materials such as copper, aluminum, or conductive polymers.
[0073] FIG. 10 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment.
[0074] As shown in FIG. 10, the feeding element 66 is mounted on a surface of a lens 60. The ground element 67 is mounted on a side wall of the lens 60. An inner conductor 64 of a coaxial cable 61 is connected to the feeding element 66 via a first connection part or connection member 661. An outer conductor 64 of the coaxial cable 61 is connected to the ground element 67 via a second connection part or connection member 671. In FIG. 10, the inner conductor 64 is welded to the first connection part 661 via a solder spot 65, and the outer conductor 62 is welded to the second connection part 671 via a solder spot 63.
[0075] In various embodiments, the antenna is divided into several parts so that the antenna shape / layout is flexible, simplified and miniaturized. As such, the antenna layout is provided without occupying too much of the field of view or the waveguide area.
[0076] FIG. 11 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment. In FIG. 11, a feeding element 71 is connected to an inner conductor via a connection element 711. The feeding element 71 is directly formed on a surface of the lens by ink-jet printing.
[0077] Ink-jet printing is a method for fabricating an antenna on a lens of an AR / VR glass style device. it allows for lightweight, compact, and flexible designs that are suitable for wearable devices. The glass style device requires antennas that are small, efficient, and capable of operating at high frequencies, for example, for Wi-Fi, Bluetooth, 5G, or mmWave communications. The antenna formed by ink-jet printing has a compact size and is easy to conform to the curved surfaces of the lens so as to be fit within the limited space of an AR / VR glass style device frame. The antenna formed by ink-jet printing is lightweight and will not add significant weight to the glass style device. Silver nanoparticle ink is usually used for ink-jet printing due to its high conductivity and compatibility with ink-jet printing. In an embodiment, multiple layers may be printed as an antenna element to achieve the desired conductivity and thickness.
[0078] In the embodiment of FIG. 11, the feeding element 71 is printed on the surface of the lens by using conductive ink. The feeding element 71 can be tailored to fit the specific design and shape of the lens with minimal weight added to the glass style device.
[0079] In this embodiment, the additional connection element 711 is used to enhance performance, improve impedance matching, or enable specific functionalities. Because the feeding element is directly printed on the surface of the lens, it will be difficult to make a soldering pad on the side wall of the lens. the additional connection element 711 is bent so that one portion of the additional connection element 711 is on the surface of the lens and is in contact with the printed feeding element 71 and the other portion of the additional connection element 711 is on the side wall of the lens. It will be easier to form a soldering pad on the portion of the additional connection element 711 on the side wall of the lens. The additional connection element 711 is made by conductive material, metal plate and so on.
[0080] The additional connection element 711 can be used for impedance matching, to ensure maximum power transfer between the antenna and the feedline by matching the impedance of the antenna to the feedline, which is typically 50 Ω. The additional connection element 711 can be used for BALUNs, to convert between balanced signals, for example, in antennas, and unbalanced signals, for example, in a coaxial cable. The additional connection element 711 can be used for parasitic unit to enhance the antenna's performance. The additional connection element 711 can be used to adjust the antenna's resonant frequency or bandwidth.
[0081] Usually, the connection points of the antenna with feedline or contact component are easier to be broken. Especially, an ink-jet printed feeding element is vulnerable to be damaged. By using the additional connection element, the connection points will be enhanced so that the antenna will be more robust.
[0082] By incorporating additional connection elements, antenna designers can significantly enhance performance, enable new functionalities, and adapt antennas to specific applications. These elements are critical for modern wireless systems, including 5G, IoT, and wearable devices.
[0083] FIG. 12 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment. As shown in FIG. 12, the ground element 81 is formed as at least one part of a lens bracket for the glass style device.
[0084] The lens bracket is a structural component designed to hold the lenses securely in place within the frame. It ensures proper alignment, stability, and positioning of the lenses relative to the user’s eyes. The primary function of the lens bracket is to keep the lenses firmly in place, preventing any movement or misalignment. The lens bracket is relatively robust and has a relatively large profile. When the ground element is formed as at least one part of the lens bracket, it can be formed in a robust manner. This will improve the stability of the ground element, which may lead to a better performance.
[0085] The lens bracket together with the antenna element such as the ground element may permanently attach the lenses to the frame of the glass style device, typically using adhesives or welding.
[0086] In an embodiment, the lens bracket may be a removable or modular lens bracket, which allows lenses to be easily removed, adjusted, or replaced. This can offer the AR / VR glass style device with modular designs.
[0087] The lens bracket may use clips or snaps to hold lenses in place, allowing for quick swapping. In an example, the lens bracket utilizes magnets for secure but easily removable connections.
[0088] The lens bracket may include screws or hinges to provide a secure hold while allowing for adjustments. As such, the lens bracket will ensure a precise alignment for accurate image projection and focus.
[0089] The material of the lens bracket may further include lightweight and durable materials such as lightweight metals (for example, titanium) , high-strength plastics, or composites for comfort and durability.
[0090] FIG. 13 is a schematic diagram showing a structure of an antenna for an AR / MR lens according to another embodiment. As shown in FIG. 13, the ground element 931 and the feeding element 932 of the antenna are connected to a printed circuit board (PCB) or a flexible printed circuit board (FPC) 92 via contact parts 91.
[0091] The contact part 91 can be in a small profile. The contact part 91 can be a SMT (Surface Mounted Technology) element, which can be directly mounted on a PCB or FPC. It can provide a flexible connection for the antenna and the PCB or FPC, which can give more freedom of design to a manufacturer. The contact part can provide more support to the antenna elements or the PCB or FPC. It allows for an easier upgrades and part replacement. For example, the contact parts 91 may be spring-finger type contacts or pogo-pin type contacts.
[0092] By using the contact part, the welding process for the antenna elements may be eliminated. So, no heat or less heat is involved. The risk of heat damage may be eliminated or reduced. This is particularly beneficial for sensitive AR / VR electronics.
[0093] Furthermore, it is easier to connect and disconnect a contact part, which will simplify the assembly and repairs of such devices.
[0094] FIG. 14 is a schematic diagram showing a contact part of an example according to an embodiment. The contact parts may include a back portion 911, a stop portion 912, a first bend portion 913, a second bend portion 914 and a contact portion 915.
[0095] The back portion 911 may be mounted on the PCB or FPC 92 and the contact portion 915 is in contact with the ground element 931 or the feeding element 932. The first bend portion 913 and the second bend portion 914 can provide a flexibility for the connection between the lens and the temple in which the PCB or FPC 92 is normally hosted. The stop portion 912 will restrain the antenna elements from moving away too much. This contact part is suitable for such an antenna connection of an AR / MR glass style device, which offers a flexibility with desired restrains and a small profile.
[0096] FIG. 15 is a schematic diagram showing contact parts in an antenna for an AR / MR lens according to another embodiment. As shown in Fig. 15, the two contact parts 91 are mounted on a PCB 92. The back portions of the contact parts 91 are fixed on the PCB 92 and the contact portions of the contact parts 91 are in contact with the ground element 931 or the feeding element 932. FIG. 16 is a schematic top view of contact parts mounted in an antenna for an AR / MR lens according to another embodiment.
[0097] FIG. 17 is a schematic diagram showing contact parts mounted on a PCB according to another embodiment. FIG. 18 is a schematic side view of contact parts mounted in an antenna for an AR / MR lens according to another embodiment. As shown in Fig. 17 and Fig. 18, the contact parts 91 are mounted on the PCB 92 with its back portions being fixed on the PCB 92. The PCB 92 includes printed signal lines. The two contact parts are coupled to an inner conductor and an outer-conductor of a coaxial cable 94, respectively, via the printed signal lines and welding beads or solder spots. For example, the printed signal lines include a first printed line and a second printed line, and the two contact parts include a first contact part for contacting the ground element and a second contact part for contacting the feeding element. The first contact part is connected to the first printed line and the second contact part is connected to the first printed line. The first printed line is welded to the outer-conductor of a coaxial cable 94 via a first welding bead, and the second printed line is welded to the inner-conductor of a coaxial cable 94 via a second welding bead. The printed signal lines and the welding beads are impedance matching with the coaxial cable so as to reduce the signal loss between the antenna elements and the transmission lines.
[0098] The descriptions of the various embodiments of the present invention have been presented for purposes of illustration, but are not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement over technologies found in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims
1.An antenna device for a glass style device of an augmented reality or mixed reality device, including:at least two separate antenna elements, including a ground element and a feeding element which are separate from each other, wherein both the ground element and the feeding element are located out of a core area of Field of View; andat least two signal paths, including a first signal path and a second signal path which are connected to the ground element and the feeding element, respectively,wherein at least one of the ground element and the feeding element are designed for being mounted around a side wall of lens of the glass style device.2.The antenna device according to Claim 1, wherein the feeding element is a non-transparent element and is designed for being amount on a surface of the lens.3.The antenna device according to Claim 2, wherein the ground element is formed in strip-like shape and is designed for being mounted around the lens.4.The antenna device according to any of Claim 1 to 3, wherein the first signal path is an outer-conductor of a coaxial cable and the second signal path is an inner -conductor of the coaxial cable, the ground element is connected to the outer-conductor of the coaxial cable and the feeding element is connected to the inner conductor of the coaxial cable.5.The antenna device according to Claim 1, wherein the feeding element is directly formed on a surface of the lens by ink-jet printing.6.The antenna device according to Claim 5, further including a connection element, which is placed onto at least one part of the feeding element and connects the feeding element to the second signal path.7.The antenna device according to Claim 1, wherein the ground element is formed as at least one part of a lens bracket for the glass style device.8.The antenna device according to Claim 1, wherein the first signal path includes a first printed line on a printed circuit board or a flexible printed circuit, a first contact part mounted on the printed circuit board or the flexible printed circuits for connecting the first printed line and the ground element, and an outer-conductor of a coaxial cable connected to the first printed line, andwherein the second signal path includes a second printed line on the printed circuit board or the flexible printed circuit, a second contact part mounted on the printed circuit board or the flexible printed circuits for connecting the second printed line and the feeding element, and an inner-conductor of the coaxial cable connected to the second printed line.9.The antenna device according to Claim 8, wherein the contact parts are spring-finger type contacts or pogo-pin type contacts.10.A glass style device of an augmented reality or mixed reality device including an antenna device according to Claim 1.