AR glasses

Abstract

The invention discloses AR glasses, and relates to the technical field of AR glasses, and the AR glasses comprise an optical machine module, an optical lens, and an antenna. The optical lens at least comprises a first area and a second area different from the first area; light emitted by the ray machine module enters the optical lens in the first area; the projection of the antenna on the optical lens is located in the second area; the antenna comprises a metal area, a bonding pad area and a feed coaxial line. The metal area is provided with a gap formed by slotting, and the feed end of the gap is electrically connected to the bonding pad area; at least part of the feed coaxial line is located in the bonding pad area and connected with the feed end, so that the feed end connected with the feed coaxial line enters an open circuit state, namely, the feed coaxial line is directly used as a feed line of the gap, a conventional coupling mode is avoided, the miniaturization design of the bonding pad area is achieved, and the size of the antenna is reduced. Therefore, the bonding pad area, the light machine module and the camera module can be hidden in the glasses frame together, so that the miniaturization requirement of AR glasses is met.

Description

Technical Field

[0001] This application relates to the field of AR glasses technology, and more particularly to an AR glasses. Background Technology

[0002] Transparent antennas are designed on the lenses of AR (Augmented Reality) glasses using transparent metal to enable the transmission and reception of wireless signals. The solder pad area of ​​traditional transparent antennas, along with the optomechanical module and camera module, is hidden inside the frame shell of the AR glasses.

[0003] However, as AR glasses become smaller, the size of the frame will gradually shrink. In cases where the optical engine module and camera module need to be retained, the area of ​​the pads is relatively large because the transparent antenna excites the frame through coupling. This makes it impossible for the shrunken frame to effectively accommodate the pads, and the pads will be partially exposed outside the frame shell, which is not conducive to the miniaturization of AR glasses. Summary of the Invention

[0004] The main purpose of this application is to provide an AR glasses that addresses the technical problem of how to effectively accommodate the optical engine module, camera module, and pad area in a reduced-size frame.

[0005] To achieve the above objectives, this application proposes an AR glasses, which includes: an optical engine module, optical lenses, and an antenna; the optical lenses include at least a first region and a second region different from the first region;

[0006] The light emitted by the optomechanical module enters the optical lens in the first region;

[0007] The projection of the antenna onto the optical lens is located in the second region;

[0008] The antenna includes: a metal area, a pad area, and a feed coaxial line;

[0009] There is a gap formed by a slit in the metal area, and the power supply end of the gap is electrically connected to the pad area;

[0010] At least part of the power supply coaxial line is located within the pad area and is connected to the power supply end.

[0011] In one embodiment, the optical lens includes a first surface and a second surface opposite to the first surface, and a side surface located between the first surface and the second surface, wherein light emitted from the optomechanical module is incident on the optical lens from the second surface;

[0012] At least a portion of the pad area is located on the side.

[0013] In one embodiment, at least a portion of the power supply coaxial line extends along the side.

[0014] In one embodiment, the feed coaxial line consists of an inner conductor and an outer conductor, and the feed end is composed of a first seam and a second seam;

[0015] The inner conductor is connected to the second seam, the outer conductor is connected to the first seam, and the power supply terminal is in an open circuit state.

[0016] In one embodiment, the gap includes a first gap unit, a second gap unit, and a third gap unit;

[0017] The second end of the first slot unit is perpendicular to the second slot unit and is connected to the second slot unit, forming an L-shaped open-circuit slot unit with the second slot unit;

[0018] The second slot unit is perpendicular to the third slot unit and is connected to the third slot unit, forming an L-shaped slot unit with the third slot unit.

[0019] In one embodiment, the metal region is divided into a transparent metal mesh region and a solid metal region;

[0020] The interiors of the first slit unit, the second slit unit, and the third slit unit located on the transparent metal mesh area are filled with a grid, and the grid line shape of the filled grid is consistent with the grid line shape of the transparent metal mesh area.

[0021] In one embodiment, no outline is provided at the edges of the slits and the edges of each filling grid;

[0022] There are gaps between the fill grids, and there are gaps between the fill grids set in the gaps.

[0023] In one embodiment, the optical lens consists of a front protective sheet, an antenna carrier sheet, an optical waveguide sheet, and a rear protective sheet, with the metal region and the pad region located on the antenna carrier sheet;

[0024] The second surface of the front protective sheet is bonded to the first surface of the antenna carrier sheet;

[0025] The second surface of the antenna carrier sheet is bonded to the first surface of the optical waveguide sheet;

[0026] The second surface of the optical waveguide is bonded to the first surface of the rear protective sheet.

[0027] In one embodiment, the AR glasses also include a frame, which consists of a front frame and a rear frame, which enclose an accommodating space. The metal area is divided into a transparent metal mesh area and a solid metal area.

[0028] The transparent metal mesh area consists of a first metal mesh portion area and a second metal mesh portion area. The first metal mesh portion area, the pad area, and the solid metal area are located within the receiving space, while the second metal mesh portion area is located outside the receiving space.

[0029] The first surface of the front protective film is attached to a portion of the inner surface of the front lens frame, and the second surface of the rear protective film is attached to a portion of the inner surface of the rear lens frame.

[0030] In one embodiment, the pad area of ​​the pad region is 5mm*0.9mm;

[0031] The length of the first slit unit is 7.25 mm, and the width of the first slit unit is 0.2 mm;

[0032] The second gap unit has a length of 20mm and a width of 0.5mm;

[0033] The length of the third gap unit is 4.5mm, and the width of the third gap unit is 0.5mm;

[0034] The first end of the first slot unit is the power supply end.

[0035] One or more technical solutions proposed in this application have at least the following technical effects:

[0036] An AR glasses application for AR glasses is proposed, the AR glasses comprising: an optical engine module, an optical lens, and an antenna; the optical lens includes at least a first region and a second region different from the first region; light emitted by the optical engine module is incident on the optical lens in the first region; the projection of the antenna on the optical lens is located in the second region; the antenna includes: a metal region, a pad region, and a feed coaxial line; a slot formed by a slit has been formed on the metal region, and the feed end of the slot is electrically connected to the pad region; at least a portion of the feed coaxial line is located in the pad region and connected to the feed end.

[0037] Specifically, the antenna of the AR glasses in this application has a slot in the metal area, and the feed end of the slot is electrically connected to the pad area. This allows the feed coaxial line inserted into the pad area to be directly connected to the feed end, so that the feed end connected to the feed coaxial line enters the open circuit state. That is, the feed coaxial line is used directly as the feed line of the slot, avoiding the need for a large pad area due to the conventional coupling method of using microstrip lines for slot coupling feed. This achieves the miniaturization design of the pad area, allowing the pad area to be hidden in the frame along with the optical engine module and camera module, thereby meeting the miniaturization requirements of AR glasses. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the structure of the AR glasses in this application;

[0041] Figure 2 This is a schematic diagram of the structure of a conventional AR glasses according to this application;

[0042] Figure 3 This is a schematic diagram showing the positions of the optical engine module and camera module on the AR glasses;

[0043] Figure 4 This is a schematic diagram showing the specific connection between the power supply coaxial line and the power supply terminal in this application;

[0044] Figure 5 This is a schematic diagram showing the location of each gap unit in the gap of this application;

[0045] Figure 6 This is a schematic diagram of the input impedance versus frequency curve for the gap simulation in this application.

[0046] Figure 7 This is a schematic diagram of the surface current distribution of the slot in this application at a frequency of 2.6 GHz;

[0047] Figure 8 This is a schematic diagram of the surface current distribution of the slot in this application at a frequency of 5.6 GHz;

[0048] Figure 9 This is a schematic diagram of the surface current distribution of the slot in this application at a frequency of 7.5 GHz;

[0049] Figure 10 This is a schematic diagram showing the frequency variation curves of the antenna efficiency of the slot proposed in this application and the antenna efficiency of a conventional pure metal slot.

[0050] Figure 11 A schematic diagram illustrating the specific structure of the mesh filling within the gaps in this application;

[0051] Figure 12 A schematic diagram showing the frequency-dependent antenna efficiency curves when the slot is filled with a mesh and when the slot is not filled with a mesh.

[0052] Figure 13 This is a schematic diagram showing the frequency variation curves of the antenna efficiency of the slot proposed in this application and the antenna efficiency of a conventional non-transparent slot.

[0053] Figure 14 This is a schematic diagram of the overall structure of AR glasses.

[0054] Explanation of icon numbers:

[0055] 10. Metallic area; 101. Transparent metallic mesh area; 102. Solid metal area;

[0056] 20. Slot; a. Power supply end; 201. First slot unit; 202. Second slot unit; 203. Third slot unit;

[0057] 30. Pad area; 40. Power supply coaxial cable;

[0058] 2011, First seam; 2012, Second seam; 4011, Inner conductor; 4012, Outer conductor;

[0059] b. First fill grid; c. Second fill grid; d. Third fill grid.

[0060] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0061] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0062] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0063] The main solution of this application embodiment is: to propose an AR glasses, which includes: an optical engine module, an optical lens, and an antenna; the optical lens includes at least a first region and a second region different from the first region; light emitted by the optical engine module is incident on the optical lens in the first region; the projection of the antenna on the optical lens is located in the second region; the antenna includes: a metal region, a pad region, and a feed coaxial line; there is a slot formed by a slit on the metal region, and the feed end of the slot is electrically connected to the pad region; at least part of the feed coaxial line is located in the pad region and is connected to the feed end.

[0064] As AR glasses become smaller, the size of the frame will gradually decrease. In cases where the optical engine module and camera module need to be retained, the area of ​​the pads is relatively large because the transparent gap is used to excite the frame through coupling. This makes it impossible for the smaller frame to effectively accommodate the pads, and the pads will be partially exposed outside the frame shell, which is not conducive to the miniaturization of AR glasses.

[0065] This application provides a solution where the metal region of the antenna in the AR glasses has a slot formed by a slit. The feed end of this slot is electrically connected to the pad region, allowing a portion of the feed coaxial line inserted into the pad region to be directly connected to the feed end. This puts the feed end connected to the feed coaxial line into an open circuit state, i.e., the feed coaxial line is used directly as the feed line for the slot. This avoids the need for a large pad region, which is required by the conventional coupling method using microstrip lines for slot coupling and feeding. This achieves a miniaturized design of the pad region, allowing the pad region to be hidden inside the frame along with the optomechanical module and camera module, thus meeting the miniaturization requirements of AR glasses.

[0066] Based on this, the embodiments of this application provide AR glasses, referring to... Figure 1 , Figure 1 This is a schematic diagram of the structure of the AR glasses in this application.

[0067] In this embodiment, the AR glasses include: an optical engine module, an optical lens, and an antenna; the optical lens includes at least a first region and a second region different from the first region; light emitted by the optical engine module is incident on the optical lens in the first region; the projection of the antenna on the optical lens is located in the second region; the antenna includes: a metal region, a pad region, and a feed coaxial line;

[0068] There is a slot 20 formed by a slit in the metal region 10, and the power supply end a of the slot 20 is electrically connected to the pad region 30; at least part of the power supply coaxial line 40 is located in the pad region 30 and is connected to the power supply end a.

[0069] Combination Figure 2 and Figure 3 This section explains conventional transparent AR glasses. First, it introduces… Figure 2 It can be seen that, Figure 2 The proposed method involves a transparent slit on an optical lens that excites the frame of AR glasses via coupling. Specifically, the coupling portion (microstrip line) is positioned on a pad area, indirectly connecting the coaxial line and the feed coplanar waveguide. Therefore, the corresponding pad area is relatively large, measuring 8.4mm x 5mm. However, according to... Figure 3As can be seen, in addition to the pad area, the optical engine module and camera module also need to be set inside the frame. Therefore, as the frame is miniaturized and its size is reduced with the miniaturization of AR glasses, the space inside the frame that can be used to hide devices will also be reduced. If the hiding requirements of the optical engine module and camera module are met first, the pad area will not be able to be effectively accommodated, and the pad area will be partially exposed outside the frame.

[0070] Therefore, based on the aforementioned shortcomings, an AR glasses model as shown in this embodiment is proposed, combining... Figure 1 The following explanation is provided. In this embodiment, by placing the feed terminal a of the slot 20 formed by the slit in the metal region 10 within the pad region 30, the feed coaxial line 40 inserted into the pad region 30 can be directly connected to the feed terminal a. At this time, the feed terminal a connected to the feed coaxial line 40 enters an open-circuit state, allowing the electromagnetic waves inside the feed coaxial line 40 to excite an electromagnetic field at the feed terminal a, which is in an open-circuit state. This electromagnetic field enables the slot 20 to become a device capable of receiving and transmitting wireless signals. Figure 2 Compared to the coupling method shown, this embodiment uses the coaxial feeding line 40 directly as the feed line for the slot 20, avoiding the need for a large pad area that would exist if the slot were coupled and fed through a microstrip line (coupling section). Figure 1 It can be seen that the pad area 30 in this embodiment is significantly smaller than... Figure 2 The pad area in the middle is only 5mm*0.9mm, compared to Figure 2 Compared to the previous version, the size was reduced by 89.3%. This not only enabled the miniaturization of the pad area 30, allowing it to be hidden within the lens frame along with the optical engine module and camera module without the risk of exposure, but also avoided the complex power feeding structure design that required gap power feeding via coupling.

[0071] Furthermore, the power supply coaxial line 40 is composed of an inner conductor 4011 and an outer conductor 4012, and the power supply end a is composed of a first seam 2011 and a second seam 2012; the inner conductor 4011 is connected to the second seam 2012, and the outer conductor 4012 is connected to the first seam 2011.

[0072] It should be noted that the optical lens includes a first surface and a second surface opposite to the first surface, as well as a side surface located between the first and second surfaces, wherein the light emitted by the optomechanical module enters the optical lens from the second surface, as shown in the figure. Figure 1 It is known that at least part of the pad area 30 is located on the side, thereby reducing the surface area of ​​the lens required by the antenna.

[0073] Additionally, at least a portion of the power supply coaxial cable 30 extends along the side. Because the power supply coaxial cable is inserted into the receiving space, for ease of subsequent replacement, a portion of the power supply coaxial cable is located within the receiving space, and another portion is located outside the receiving space, i.e., as shown... Figure 1 As shown, it extends along the side of the lens.

[0074] Specifically, according to Figure 4 It is known that the power supply coaxial line 40 has an inner conductor 4011 and an outer conductor 4012, as well as an insulating medium between the two. In this embodiment, the gap is formed by the first seam 2011 and the second seam 2012. Therefore, the two ends forming the power supply end a can be defined as the first seam 2011 and the second seam 2012.

[0075] In this embodiment, in order to enable electromagnetic waves to propagate in the form of an electromagnetic field between the inner conductor 4011 and the outer conductor 4012 in the feeding coaxial line 40, and to enable the electromagnetic waves to form a complete current loop while maintaining the structure of the electromagnetic field, so that the electromagnetic waves can transition from the feeding coaxial line 40 to the feeding end a without loss, and to feed the gap 30 to which the feeding end a belongs, it is proposed that when the feeding coaxial line 40 is connected to the feeding end a, the inner conductor 4011 of the feeding coaxial line 40 needs to be connected to the second gap line 2012 of the feeding end a, and the outer conductor 4012 of the feeding coaxial line 40 needs to be connected to the first gap line 2011 of the feeding end a. This connection method enables the feeding end a to enter an open circuit state, so that the feeding coaxial line 40 can be directly used as the feed line of the gap 30 to which the feeding end a belongs. Specifically, the inner conductor 4011 is connected to the second seam 2012 by low-temperature welding, and the outer conductor 4012 is connected to the first seam 2011 by low-temperature welding. This ensures that electromagnetic waves can be effectively transmitted from the feed coaxial line 40 to the gap 30 belonging to the feed end a, thus guaranteeing the integrity and transmission efficiency of the wireless signal.

[0076] Meanwhile, since the input impedance of slot 20 is usually not a pure resistance but a complex impedance with a reactive component, connecting the inner conductor 4011 and outer conductor 4012 of the feed coaxial line 40 to the two slots of feed terminal a respectively helps to achieve impedance matching between slot 20 and feed coaxial line 40, reducing wireless signal reflection and loss, and improving transmission efficiency. Furthermore, if only one slot of feed coaxial line 40 (inner conductor 4011) is connected to feed terminal a, without connecting the other slot of feed terminal a (outer conductor 4012), wireless signal leakage will occur in feed coaxial line 40, causing energy loss and potential interference problems.

[0077] In one feasible implementation, the gap 20 includes a first gap unit 201, a second gap unit 202 and a third gap unit 203;

[0078] In this embodiment, the length of the first slot unit 201 is 7.25 mm and the width of the first slot unit 201 is 0.2 mm; the length of the second slot unit 202 is 20 mm and the width of the second slot unit 202 is 0.5 mm; the length of the third slot unit 203 is 4.5 mm and the width of the third slot unit 203 is 0.5 mm; wherein the first end of the first slot unit 201 is the power supply end a.

[0079] according to Figure 5 As can be seen, in this embodiment, the gap 20 formed by slits in the metal region is composed of three gap units. By combining gap units of different gap lengths, the gap length is reduced, the metal region 10 is shrunk, and multiple resonant points are generated at high frequencies. Specifically, as follows:

[0080] like Figure 5 As shown, the second end of the first slot unit 201 is perpendicular to and connected to the second slot unit 202, forming an L-shaped open-circuit slot unit. The length of this L-shaped open-circuit slot unit can reach approximately 26 mm, corresponding to a slot length of 1 / 4 wavelength in the 2.4 GHz frequency band, which is half the length compared to traditional slots. The second slot unit 202 is perpendicular to and connected to the third slot unit 203, forming an L-shaped slot unit.

[0081] By using the slotted units described above, multiple resonant points can be generated at high frequencies, specifically as follows: Figures 6-9 As shown.

[0082] like Figure 6 The figure shows the simulated input impedance versus frequency curve of the slot 20 composed of the first slot unit 201 to the third slot unit 203 in this embodiment. The real part represents the resistive component of the slot 20, including loss resistance and radiation resistance, while the imaginary part represents the reactive component, including inductive reactance and capacitive reactance. It can be seen that the slot 20 has resonant points at approximately 2.6 GHz, 5.6 GHz, and 7.5 GHz. This means that the slot 20 in this application can have resonant points at different frequencies, indicating that the slot 20 can effectively transmit or receive electromagnetic waves at these frequencies without energy loss or reflection due to the inductive or capacitive components of the input impedance. Figure 6 The horizontal axis represents frequency, and the vertical axis represents the unit of resistance.

[0083] like Figure 7The diagram shows the surface current distribution of the slit 20, composed of the first slit unit 201 to the third slit unit 203, at a frequency of 2.6 GHz. It can be seen that there is a strong current distribution at the second slit unit 202 of the slit 20. Since the total length of the first slit unit 201 and the second slit unit 202 is about 26 mm, considering the influence of the dielectric, the total dielectric length of the L-shaped open-circuit slit unit composed of the first slit unit 201 and the second slit unit 202 at a frequency of 2.6 GHz is about 1 / 4 wavelength. Therefore, the working mode of the L-shaped open-circuit slit unit at this frequency is 1 / 4 wavelength. Compared with the traditional slit length of 1 / 2 wavelength, the L-shaped open-circuit slit unit can reduce its length by half, which is beneficial to the reduction of the area of ​​the metal region 10 and meets the trend of subsequent reduction of the area of ​​optical lenses.

[0084] like Figure 8 The diagram shows the surface current distribution of slot 20 at 5.6 GHz in this embodiment. It can be seen that the surface current is mainly concentrated in the second slot element 202 and the third slot element 203, and the surface currents in the second and third slot elements 202 and 203 are in opposite directions. This means that the second and third slot elements 202 and 203 play a complementary role in the antenna radiation process. These opposite currents can superimpose electromagnetic fields, thereby enhancing the antenna's radiation efficiency. Furthermore, the total length of the second and third slot elements 202 and 203 is approximately 25 mm. Therefore, the second and third slot elements 202 and 203 together form a 1 / 2 wavelength L-shaped slot element for radiation.

[0085] like Figure 9 The diagram shows the surface current distribution of slot 20 at 7.5 GHz in this embodiment. It can be seen that the surface current is mainly concentrated in the second slot unit 202 and the third slot unit 203, meaning that the second slot unit 202 and the third slot unit 203 are the main regions for radiating or receiving electromagnetic waves at the 7.5 GHz frequency. The operating mode is 3 / 4 wavelength, meaning that the length of the second slot unit 202 and the third slot unit 203 is 3 / 4 of the wavelength at the 7.5 GHz frequency, resulting in high radiation efficiency for the second slot unit 202 and the third slot unit 203 at the 7.5 GHz frequency.

[0086] It should be noted that, Figures 7 to 8 The color scale in the figure represents the current density (A / m) when the surface current flows through the gap 20.

[0087] Therefore, it can be seen that in this embodiment, the slot 20 formed by slits in the metal region 10 is composed of slot units with different slot lengths. Based on the connection relationship between each slot unit, different operating frequencies can be achieved when different slot lengths are formed. Taking the presence of the first slot unit 201 to the third slot unit 203 as an example, the antenna efficiency of the slot 20 composed of the first slot unit 201 to the third slot unit 203 varies with frequency (i.e., Figure 10 The transparent curve in the figure), and the frequency-dependent efficiency curve of the antenna with a pure metal slot (i.e., the efficiency curve of the antenna with a pure metal slot). Figure 10 (pure metal curves in the image) for example Figure 10 As shown, the curves of the two are basically consistent, that is, the antenna performance of the slot 20 composed of the first slot unit 201 to the third slot unit 203 is not much different from the antenna performance of the pure metal slot.

[0088] According to this Figure 10 It is also known that when the antenna efficiency of the slot 20 in this embodiment is less than -10dB, its corresponding operating frequency bands are 2.29GHz-2.57GHz and 3.3GHz-8GHz. However, the operating frequency bands required by the WIFI 6E / 7 protocol are 2.4GHz (802.11b / g, band range 2.400GHz to 2.4835GHz), 5GHz (802.11a, band range 5.150GHz to 5.825GHz), and 6E (802.11ax, band range 5.925GHz to 7.125GHz). Therefore, the operating frequency band of the slot 20 in this embodiment can cover mobile communication bands such as WIFI 6E / 7, meeting the requirements for wideband and multi-frequency antennas. Furthermore, compared to traditional LOOP, dipole, and monopole terminal antennas, the slot 20 in this embodiment not only has a simpler structure but also achieves a wider bandwidth range. Figure 10 The horizontal axis represents frequency, and the vertical axis represents antenna efficiency.

[0089] Furthermore, it should be noted that since the gap 20 in this embodiment is formed by opening a slot in the metal area 10, compared with the conventional method of opening a slot or window in the metal frame to form a multi-frequency antenna, this embodiment does not increase the structural design of the metal frame, while ensuring the integrity and aesthetics of the metal frame, and avoiding the situation of high design complexity of AR glasses and complex antenna wiring that would result from opening a slot in the metal frame.

[0090] In one feasible implementation, refer to Figure 1As shown, the metal region 10 is divided into a transparent metal mesh region 101 and a solid metal region 102. In this embodiment, the transparent metal mesh region 101 and the solid metal region 102 serve the same function, both acting as the ground end of the gap 20. The only difference is that the transparent metal mesh region 101 is exposed outside the frame of the AR glasses, that is, it is set on the lens of the AR glasses. In order to achieve a transparent effect and avoid obstructing the user's view, the transparent metal mesh region 101 is made of an ultra-fine metal mesh. The grid lines of the ultra-fine metal mesh can be set to a width of 6µm, a line thickness of 3µm, and a line spacing of 150µm, with a light transmittance of up to 83%, which can effectively avoid obstructing the user's view and achieve a transparent effect.

[0091] The solid metal region 102 is hidden within the housing space of the AR glasses. By connecting the solid metal region 102 and the transparent metal mesh region 101, a larger ground area is formed. Because a larger ground area can provide a more stable reference plane, reduce wireless signal reflection, and allow more energy to be effectively radiated, thereby achieving better impedance matching and improving the efficiency of the gap 20.

[0092] A filling mesh is provided inside the first slit unit 201, the second slit unit 202, and the third slit unit 203 located on the transparent metal mesh area 101. The grid shape of the filling mesh is consistent with the grid shape of the transparent metal mesh area 101.

[0093] Because the gap is exposed outside the AR glasses' storage space, i.e., set on the optical lens of the AR glasses, although the gap 20 formed by the slit in the transparent metal mesh area 101 has the same transparent effect as the transparent metal mesh area 101, there is still a difference in transparency between the lens area with the transparent metal mesh area 101 and the lens area without the transparent metal mesh area 101. Therefore, under strong light, the user can still observe the shape of the gap 20 on the transparent metal mesh area 101, which is not conducive to the confidentiality of the gap 20.

[0094] Based on this, this embodiment proposes to set a filling mesh inside each gap unit. Specifically, as follows: Figure 11As shown, a first filling mesh b is provided in the first gap unit 201, a second filling mesh c is provided in the second gap unit 202, and a first filling mesh d is provided in the third gap unit 203. Because the grid shape of the filling mesh is consistent with the grid shape of the transparent metal mesh area 101, both having a grid width of 6µm, a line thickness of 3µm, and a line spacing of 150µm, the gap 20 can be visually integrated with the transparent metal mesh area 101. Even if the user observes the transparent metal mesh area 101 under strong light, the filling mesh inside the gap 20 prevents the user from drawing the structure of the gap 20 on the transparent metal mesh area 101, thus ensuring the confidentiality of the gap 20.

[0095] Meanwhile, in order to further enhance the confidentiality of the gap 20, no outline is set on the edge of the gap 20 and the edge of each filling mesh in this embodiment, that is, no outline is drawn on the gap 20 and each filling mesh, reducing the observability of the gap 20 and each filling mesh.

[0096] It should be noted that the first gap unit 201 has a partially filled mesh b inside, such as... Figure 11 It can be seen that the first filling mesh b is only set inside the first gap unit 201 located in the transparent metal mesh area 101. The first gap unit 201 located in the solid metal area 102 and the pad area 30 does not need to have a transparent effect, so the first filling mesh b is not required.

[0097] Furthermore, there are gaps between the filling grids, and gaps also exist between the gaps 20 and the filling grids set in the gaps 20.

[0098] To achieve both security and antenna performance degradation of the slot 20, the filling grids within different slot elements of the slot 20 are not connected, and there are gaps between the filling grids and between the slot elements themselves. This gap ensures the security of the slot 20 without affecting antenna performance. In this embodiment, the gap is set to 50µm, and its impact on antenna performance is as follows. Figure 12 The simulation results are shown below:

[0099] Figure 12 When the coaxial cable 40 is directly fed to the slot 20 in this embodiment, the antenna efficiency (i.e., when a filling grid is provided inside the slot 20) is achieved. Figure 12 The filled grid curve in the image shows the antenna efficiency when there is no filled grid inside the slot (i.e., the antenna efficiency when there is no filled grid inside the slot). Figure 12The curves showing the antenna efficiency versus frequency (without a filler mesh) are shown in the figure. It can be seen that the change in antenna efficiency versus frequency when a filler mesh is present inside the slot 20 is smaller compared to the change when no filler mesh is present. This indicates that the filler mesh inside the slot 20 has a minimal impact on antenna performance, ensuring the confidentiality of the slot 20 and enabling transparency of the slot 20 without negatively affecting antenna performance.

[0100] Furthermore, the antenna efficiency of the slot 20 composed of the first slot element 201 to the third slot element 203 varies with frequency (i.e., Figure 13 The transparent curve), and the frequency-dependent curve of the antenna efficiency of the non-transparent slot (i.e., the transparent curve), and the frequency-dependent curve of the antenna efficiency of the non-transparent slot. Figure 13 (non-transparent curves in the text) for example Figure 13 As shown, in this embodiment, the antenna efficiency of the slot 20 in the 2.38GHz-2.5GHz frequency band is approximately -2.76dB to -3.23dB, and in the 5.15GHz-7.125GHz frequency band, it is approximately -3.55dB to -5.25dB, which meets the communication performance requirements. In contrast, the antenna efficiency of the non-transparent slot in the 2.38GHz-2.5GHz frequency band is approximately -1.45dB to -1.98dB, and in the 5.15GHz-7.125GHz frequency band, it is approximately -1.89dB to -5.65dB. Therefore, compared to the non-transparent slot, the antenna efficiency loss of the slot 20 in this embodiment is less than 1.3dB in the 2.38GHz-2.5GHz frequency band and less than 1.9dB in the 5.15GHz-7.125GHz frequency band.

[0101] in, Figure 12 and Figure 13 The horizontal axis represents frequency, and the vertical axis represents antenna efficiency.

[0102] In one feasible implementation, refer to Figure 14 As shown, the optical lens consists of a front protective sheet, an antenna carrier sheet, an optical waveguide sheet, and a rear protective sheet. The metal region and the pad region are located on the antenna carrier sheet. The second surface of the front protective sheet is attached to the first surface of the antenna carrier sheet. The second surface of the antenna carrier sheet is attached to the first surface of the optical waveguide sheet. The second surface of the optical waveguide sheet is attached to the first surface of the rear protective sheet.

[0103] Specifically, the antenna carrier sheet with the antenna is first attached to the front protective sheet using optical transparent adhesive. Then, the antenna carrier sheet and the front protective sheet are attached together as a whole to the optical waveguide sheet using optical transparent adhesive. Finally, the rear protective sheet is attached to the other side of the optical waveguide sheet using optical transparent adhesive to form a complete lens.

[0104] The antenna carrier sheet includes a first carrier region arranged parallel to the optical waveguide sheet and a second carrier region arranged at a certain angle to the optical waveguide sheet (i.e., Figure 14 In the Z), the second carrier region covers part of the side of the antenna carrier sheet, and at least part of the pad region is disposed in the second carrier region.

[0105] It should be noted that, in order to ensure that the assembled lenses are a whole, the shapes of the front protective sheet, antenna carrier sheet, waveguide sheet and rear protective sheet must be consistent, so that the front and rear protective sheets can not only protect the antenna carrier sheet and waveguide sheet on which the AR glasses are mounted, but also provide support for the pad area 30 on the AR glasses to prevent the pad area 30 from breaking.

[0106] The antenna carrier sheet is made of PET, which is transparent and colorless, and its thickness can be 100µm. The optical waveguide sheet serves as the optical display and is made of tempered glass or resin. The front and rear protective sheets are made of PC and serve to protect the antenna carrier sheet and the optical waveguide.

[0107] Furthermore, the AR glasses also include a frame, which consists of a front frame and a rear frame, which together form an accommodating space. The metal area 10 is divided into a transparent metal mesh area 101 and a solid metal area 102.

[0108] The transparent metal mesh area 101 is composed of a first metal mesh portion area and a second metal mesh portion area. The first metal mesh portion area, the pad area 30 and the solid metal area 102 are located within the receiving space, and the second metal mesh portion area is located outside the receiving space. The first surface of the front protective sheet is attached to a portion of the inner surface of the front frame, and the second surface of the rear protective sheet is attached to a portion of the inner surface of the rear frame.

[0109] To improve the fault tolerance of the AR glasses formed by combining the lens and frame, this embodiment further divides the transparent metal mesh area into a first metal mesh portion area and a second metal mesh portion area. The first metal mesh portion area, along with the pad area 30 and the solid metal area 102, is located within the accommodating space. This is to avoid situations where the accommodating space formed by combining some of the front and rear frames is smaller than the preset accommodating space, resulting in some of the solid metal area being exposed outside the frame. In this embodiment, the area of ​​some of the solid metal area 102 is converted into the first metal mesh portion area, thereby ensuring that the combined solid metal area 102 and the pad area 30 are not exposed outside the frame.

[0110] Among them, the optical-mechanical module can be set in Figure 14 At position ①, the camera module can be set Figure 14At position ②, the front and rear lens frames can be made of plastic or metal, serving to fix the lens, optical engine module, and camera module.

[0111] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. An AR glasses, characterized in that, The AR glasses include: an optical engine module, optical lenses, and an antenna; the optical lenses include at least a first region and a second region different from the first region. The light emitted by the optomechanical module is incident on the optical lens in the first region; The projection of the antenna onto the optical lens is located in the second region; The antenna includes: a metal region, a pad region, and a feed coaxial line; The metal region has a slot formed by a slit, and the power supply end of the slot is electrically connected to the pad region; At least a portion of the feed coaxial line is located within the pad area and is connected to the feed terminal.

2. The AR glasses as described in claim 1, characterized in that, The optical lens includes a first surface and a second surface opposite to the first surface, and a side surface located between the first surface and the second surface, wherein light emitted from the optomechanical module enters the optical lens from the second surface; At least a portion of the pad area is located on the side.

3. The AR glasses as described in claim 2, characterized in that, At least a portion of the power supply coaxial line extends along the side.

4. The AR glasses as described in any one of claims 1-3, characterized in that, The power feeding coaxial line consists of an inner conductor and an outer conductor, and the power feeding end consists of a first seam and a second seam. The inner conductor is connected to the second seam, the outer conductor is connected to the first seam, and the power supply terminal is in an open circuit state.

5. The AR glasses as described in claim 1, characterized in that, The gap includes a first gap unit, a second gap unit, and a third gap unit; The second end of the first slot unit is perpendicular to the second slot unit and is connected to the second slot unit, forming an L-shaped open-circuit slot unit with the second slot unit; The second slot unit is perpendicular to the third slot unit and is connected to the third slot unit, forming an L-shaped slot unit with the third slot unit.

6. The AR glasses as described in claim 5, characterized in that, The metal region is divided into a transparent metal mesh region and a solid metal region; A filling mesh is provided inside the first slit unit, the second slit unit, and the third slit unit located on the transparent metal mesh area. The grid shape of the filling mesh is consistent with the grid shape of the transparent metal mesh area.

7. The AR glasses as described in claim 6, characterized in that, No outline is provided at the edge of the gap or at the edge of each of the filling grids; There are gaps between each of the filling grids, and there are gaps between the gaps and the filling grids disposed in the gaps.

8. The AR glasses as described in claim 1, characterized in that, The optical lens is composed of a front protective sheet, an antenna carrier sheet, an optical waveguide sheet, and a rear protective sheet, with the metal region and the pad region located on the antenna carrier sheet; The second surface of the front protective sheet is attached to the first surface of the antenna carrier sheet; The second surface of the antenna carrier sheet is attached to the first surface of the optical waveguide sheet; The second surface of the optical waveguide sheet is attached to the first surface of the rear protective sheet.

9. The AR glasses as described in claim 8, characterized in that, The AR glasses also include a frame, which consists of a front frame and a rear frame, which together form an accommodating space. The metal area is divided into a transparent metal mesh area and a solid metal area. The transparent metal mesh area is composed of a first metal mesh portion area and a second metal mesh portion area. The first metal mesh portion area, the pad area, and the solid metal area are located within the receiving space, while the second metal mesh portion area is located outside the receiving space. The first surface of the front protective film is attached to a portion of the inner surface of the front frame, and the second surface of the rear protective film is attached to a portion of the inner surface of the rear frame.

10. The AR glasses as described in claim 5, characterized in that, The area of ​​the pads in the pad region is 5mm*0.9mm; The length of the first slit unit is 7.25 mm, and the width of the first slit unit is 0.2 mm; The second slit unit has a length of 20mm and a width of 0.5mm. The length of the third gap unit is 4.5 mm, and the width of the third gap unit is 0.5 mm; The first end of the first slot unit is the power supply end.

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