CN215527931U - Flexible transparent in-screen antenna for communication and millimeter wave radar sensing - Google Patents

Abstract

The application provides an antenna in flexible transparent screen for communication and millimeter wave radar sensing and a setting method thereof, and the metal grid structure is adopted, the transparency performance is realized through hexagonal basic unit periodic arrangement of grid units such as hexagons, wherein the hexagonal periodic grid structure can provide stronger stress resistance performance, and the change of characteristics such as resonant frequency of the antenna is smaller while the flexibility of the antenna is ensured. The antenna with various structures is manufactured on the basis of the metal grid, and the working frequency, the coverage area and other properties of the antenna are adjusted through patterning the metal grid.

Description

Flexible transparent in-screen antenna for communication and millimeter wave radar sensing

Technical Field

The application relates to the technical field of communication, in particular to a flexible transparent in-screen antenna for communication and millimeter wave radar sensing.

Background

With the development of communication technology and the popularization of wireless local area networks, the number of devices which can be networked and have display screens, such as televisions, personal computers, mobile phones and the like, in families is increasing, and the functions are strengthened continuously. These displays, supported by new communication technologies, have been extending not only to multimedia player terminals but also to multiple functions such as gaming, shopping, etc. Therefore, the requirements for the control of the display screen are also based on the remote controller key type control, the touch screen control, the peripheral keyboard and mouse control and the like, and various control requirements such as eyeball tracking, gesture recognition, voice recognition and the like which do not need to be contacted are derived. The realization of these control requirements requires a high performance sensing system and a rational design of the system architecture.

Next generation 5G mobile communication systems will use millimeter wave band electromagnetic waves for communication, and various home intelligent devices also need to comply with the development of communication technology. The proposal of the concept of the internet of things puts forward new requirements on the design of a communication system of the intelligent household appliance. Therefore, the design of the intelligent household appliance needs to give consideration to both sensing and communication, and the antenna array is reasonably designed to ensure the stability of the functional module.

With the continuous development of smart phones, screen designs such as full-screen and foldable screens for expanding the screen area of the mobile phone gradually become mainstream. However, the millimeter wave antenna required in the next-generation communication technology can not be installed on the back plate of the mobile phone with high loss any more, and thus, the antenna is installed on the front surface of the mobile phone and the area of the screen of the mobile phone is enlarged, which are in conflict with each other. Therefore, the flexible transparent antenna is a feasible solution for the conflict between the millimeter wave communication and the functions of the full-screen and foldable screen.

At present, miniaturization and foldability of intelligent equipment gradually become trends, and display equipment such as mobile phones and home televisions have taken a development path of light weight, thinness and flexibility. This requirement makes the antenna matched with the flexible screen to realize the communication function when the flexible screen is applied to the traditional household electrical appliances such as televisions, so the importance of the antenna design capable of matching the millimeter wave communication and the flexible screen at the same time is increasing.

Disclosure of Invention

The present application is directed to solving, at least to some extent, one of the technical problems in the related art.

To this end, the present application aims to provide a flexible transparent in-screen antenna for communication and millimeter wave radar sensing, which can provide millimeter wave communication and non-contact motion detection functions for smart devices that display through a screen.

In order to achieve the above object, the present application provides a flexible transparent in-screen antenna for communication and millimeter wave radar sensing, comprising:

the antenna is manufactured on a metal grid formed by periodically arranging polygonal basic units.

The utility model provides an antenna in flexible transparent screen for communication and millimeter wave radar sensing adopts metal mesh structure, realizes the transparency quality through polygonal elementary cell periodic arrangement, and polygonal periodic mesh structure can provide stronger anti stress performance simultaneously, when having guaranteed the antenna flexibility, compares elementary cell structures such as quadrangle under the condition of atress, and the change of characteristics such as the resonant frequency of antenna is littleer.

In addition, the flexible transparent in-screen antenna for communication and millimeter wave radar sensing according to the present application may also have the following additional technical features:

further, in the present application, slot antennas and patch antennas and antenna arrays thereof are fabricated on the metal mesh.

Further, in the present application, the operating frequency and the coverage of the antenna are adjusted by adjusting the pattern of the metal mesh.

Further, in the present application, the polygon includes a hexagon, a rectangle, a diamond, and a triangle.

Further, in the present application, the material of the metal grid includes silver, copper, and nickel.

Further, in the present application, the manufacturing method of the antenna includes etching after electroplating and etching after magnetron sputtering.

Further, in the present application, the method further includes: and directly cutting or etching the metal grid.

Further, in the present application, when the antenna is mounted in a screen, the antenna padded with a transparent dielectric layer is mounted over a substrate by a transparent adhesive glue.

Further, in the present application, the antenna is applied to a foldable or non-foldable display device for performing display, and inside a flat glass having a radar sensing or communication function.

Further, in this application, set up radar antenna and communication antenna in the display screen simultaneously, just radar antenna distribute in the central point of display screen puts, communication antenna is located the border position of display screen. .

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a microscopic schematic diagram of an antenna design according to one embodiment of the present application;

FIG. 2 is a microscopic schematic view of the patch antenna edge of an antenna design according to one embodiment of the present application;

FIG. 3 is a schematic view of an installation of an in-screen antenna according to one embodiment of the present application;

FIG. 4 is a schematic diagram of a method for arranging an antenna in a flexible transparent screen for communication and millimeter wave radar sensing according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an antenna placement according to one embodiment of the present application;

fig. 6 is a schematic diagram of an antenna arrangement according to an embodiment of the present application;

FIG. 7 shows an embodiment of an antenna according to an embodiment of the present application applied to a screen of a mobile phone;

fig. 8 is a detailed illustration of an antenna according to an embodiment of the present application applied to the bottom of a handset;

fig. 9 is an application example of an antenna according to an embodiment of the present application to a foldable flat display device;

fig. 10 is another embodiment of an antenna according to an embodiment of the present application applied to a foldable flat display device;

FIG. 11 is a schematic diagram of a distribution of antennas according to an embodiment of the present application, in particular for use in a notebook computer;

FIG. 12 is an illustration of the operational principle of a radar antenna according to an embodiment of the present application, particularly for a notebook computer;

fig. 13 is a schematic diagram of an antenna according to an embodiment of the present application in operation for a large display device such as a television;

FIG. 14 is a schematic view of an embodiment of an antenna according to an embodiment of the present application applied to a front windshield of an automobile;

fig. 15 is a schematic diagram of the communication of the transparent metal mesh antenna in the windshield of the smart car.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

The following describes a flexible transparent in-screen antenna for communication and millimeter wave radar sensing proposed according to an embodiment of the present application with reference to the drawings.

Fig. 1 is a microscopic schematic diagram of an antenna design according to one embodiment of the present application.

As shown in FIG. 1, the flexible transparent screen internal antenna for communication and millimeter wave radar sensing is manufactured on a metal mesh formed by periodically arranging polygonal basic units.

In the embodiments of the present application, a hexagon is taken as an example for description, and furthermore, the polygon may be a hexagon, a rectangle, a diamond, a triangle, and the like.

As shown in fig. 1, the antenna adopts a metal mesh structure, the transparency performance is realized through the periodic arrangement of the hexagonal basic units, meanwhile, the hexagonal periodic mesh structure can provide stronger stress resistance performance, and the change of the characteristics of the antenna, such as the resonant frequency, is smaller compared with the basic unit structures, such as quadrangles, and the like, under the condition of stress while the flexibility of the antenna is ensured.

On the basis of the metal grid formed by the hexagonal basic units, the antenna and the antenna array with structures such as flexible and transparent slot antennas, patch antennas and the like can be manufactured, and the performance such as the working frequency, the coverage area and the like of the antenna can be adjusted through the patterning of the metal grid.

In the fabrication of the antenna, metals including, but not limited to, silver, copper, nickel, etc., may be used as the conductive material. The specific manufacturing method includes but is not limited to etching after electroplating, etching after magnetron sputtering and the like.

Fig. 2 is a microscopic view of the edges of a patch antenna of an antenna design according to one embodiment of the present application.

Referring to fig. 2, in the patterning of the antenna, the pattern edges are made to maintain a good periodicity, such as the two edge patterns shown in fig. 2. The periodic metal grid with good edge periodicity has higher transparency.

When the antenna with more complex patterning is manufactured, the metal grid can be directly cut or etched, and the edge with poor periodicity is obtained. Because the size of the antenna is far larger than that of the hexagonal basic unit, the finally obtained antenna still can keep better transparency and other performances.

When the antenna is installed in a screen, the antenna padded with the transparent dielectric layer is installed above a substrate (such as glass) through transparent adhesive glue, so that the antenna is effectively isolated from a display circuit and a touch circuit below the antenna. Meanwhile, a periodic metal mesh pattern can be added to the screen area without antenna distribution, so that higher transparency of the antenna is realized.

As shown in fig. 3, the in-screen antenna is installed below the screen protection layer, and is electromagnetically isolated from other metal traces below through the dielectric layer, and is bonded through the adhesive. The touch wiring and the light emitting unit layer in the screen are both located below the antenna in the screen.

According to the flexible transparent screen inner antenna for communication and millimeter wave radar sensing, which is provided by the embodiment of the application, the metal grid structure is adopted, the transparency performance is realized through the periodic arrangement of the polygonal basic units, meanwhile, the polygonal periodic grid structure can provide stronger stress resistance performance, the flexibility of the antenna is ensured, and meanwhile, compared with the basic unit structures such as quadrangles, the change of the characteristics such as the resonant frequency of the antenna is smaller under the stress condition.

FIG. 4 illustrates a method for arranging an antenna within a flexible transparent screen for communication and millimeter wave radar sensing, according to one embodiment of the present application.

As shown in fig. 4, the method for setting the flexible transparent in-screen antenna for communication and millimeter wave radar sensing, where the flexible transparent in-screen antenna includes a radar antenna and a communication antenna, includes:

s1, arranging the radar antenna and the communication antenna in the display screen at the same time;

and S2, distributing the radar antenna at the center of the display screen, and positioning the communication antenna at the edge of the display screen.

Install the antenna in this application in the display screen to when realizing communication and radar sensing function simultaneously, lie in distributing in central point according to the radar antenna, the mode that communication antenna distributes in the edge position is arranged. Arrangement referring to fig. 5, the embodiments given below all implement the application of the antenna in the present application in accordance with the proposed arrangement.

Fig. 6 is a schematic operation diagram of an embodiment implemented according to the arrangement proposed in the present application. It can be seen that this arrangement reduces interference between the millimeter wave radar antenna and the millimeter wave communication antenna from a spatial location. And for different use conditions of users, the simultaneous work of better communication and radar sensing can be realized through the beam control of the antenna.

Fig. 7 shows an embodiment of an antenna according to an embodiment of the present application applied to a screen of a mobile phone.

Referring to fig. 7, the millimeter wave antennas in the present application may be installed on the top and bottom of the screen of the handset, including but not limited to the locations 301a, 301b, 302, 303a, 303b shown in the figure. The transparency of the antenna makes it less opaque to the content displayed by the underlying screen. This partial occlusion can be compensated for by increasing the screen brightness of the antenna mounting portion, or by adding a repeating metal grid pattern to other portions of the screen where no antenna is distributed to improve the overall transparency consistency.

The 301a and 301b millimeter wave antennas are arranged on two sides of the top of the mobile phone screen, so that the high-speed short-distance communication function of the mobile phone is realized. The installation position on the top side can avoid the absorption of millimeter wave signals by the human body.

The 302 millimeter wave antenna is arranged on the upper edge of the screen of the mobile phone. The millimeter wave antenna at the position can be used as a millimeter wave radar to realize the functions of sight tracking, gesture recognition and the like, and meanwhile, the front camera module of the mobile phone can be installed at the position together to save the space on the screen.

303a and 303b millimeter wave antenna are installed in the lower half of cell-phone screen for the millimeter wave communication when realizing the conversation. When a user uses the mobile phone to communicate, the head of the user can shield the antenna at the top of the screen. The antenna at the lower half part of the mobile phone screen can ensure normal signal transmission with low absorption rate.

301a, 301b, 303a, 303b millimeter wave antenna is along cell-phone central axis symmetry distribution. When the user uses the mobile phone with the horizontal screen, the symmetrically distributed antennas can select one side with smaller transmission loss for communication, and the absorption of the hand of the user on millimeter wave signals when the user uses the horizontal screen is reduced.

Fig. 8 is a detailed illustration of an antenna applied to the bottom of a handset according to an embodiment of the present application.

Referring to fig. 8, the millimeter wave antenna applied to the bottom of the screen of the mobile phone in the present application is shown as 401a and 401 b. In the figure, 402 is a microphone at the bottom of the mobile phone, a wired communication interface, and other modules.

The main coverage area of the 401a and 401b antennas is the direction perpendicular to the hemisphere of the cell phone screen. This transmission direction makes the signal transmission and reception of the antenna less interfered by other modules installed at the bottom of the screen of the handset. Meanwhile, the feed network of the antenna is distributed on the upper layer of the signal transmission network of other modules, so that smaller receiving interference is realized.

Fig. 9 is a diagram illustrating an application example of an antenna according to an embodiment of the present application to a foldable flat display device.

Referring to fig. 9, the foldable flat display device can be folded along a central axis shown in the drawing. The antenna in the present application can be applied to the edge area of the screen similar to that shown at 501a, 501b, 501c, 501d, or the center area of the screen similar to that shown at 502a, 502b, 502 c.

Millimeter wave antennas similar to 501a, 501b, 501c, 501d in the edge regions of the screen may be used for millimeter wave communication for flat panel display devices. The four-corner symmetrical distribution structure can enable the planar display equipment to have the antenna with lower transmission loss to realize the normal communication function under different holding or placing conditions.

Millimeter-wave antennas similar to 502a, 502b, 502c in the center region of the screen may be used for millimeter-wave radar sensing. The radar sensing in different directions can be realized through multi-position distribution, and thus multiple functions such as motion monitoring, gesture recognition and auxiliary voice recognition are realized respectively. Meanwhile, the millimeter wave antenna in the central area of the screen can also realize the wireless communication function with other external equipment, such as a peripheral mouse, a keyboard, a handle, a remote controller and the like.

On a flat display device with more sensing and communication functions, the distribution of the antennas in the screen is relatively dense. The metal mesh antenna in the application has enough flexibility, and can be installed at a position similar to 502a in a screen above a rotating shaft, so that the realization of dense distribution of the antennas in the screen is ensured. Therefore, the antenna in the present application can be widely and densely applied to flexible or non-flexible screens. Meanwhile, the interference among the densely distributed antennas can be solved by designing the antennas working at different frequency bands and designing different functions in a time-sharing manner.

Fig. 10 is another embodiment of an antenna according to an embodiment of the present application applied to a foldable flat display device.

Referring to fig. 10, for a smaller foldable display device, such as a foldable mobile phone, a smaller foldable tablet computer, etc., there is a design in which both the inside and outside of the folding surface have a screen distribution. In this embodiment, the millimeter wave antennas only distributed on the inner side cannot perform low-loss normal communication under the condition that the outer screen is used after being folded, and thus the millimeter wave antennas are required to be added on both the inner and outer screens. In the figure, 601a is a millimeter wave antenna in the outer screen, and 602b is a millimeter wave antenna in the inner screen.

The antenna distribution positions shown in fig. 10 are only used to indicate a case where there is a distribution on both the inside and outside, and do not indicate that the antennas are specifically distributed in the center of the screen. The antennas may be distributed at different positions of the inside and outside screens according to the function of the antennas. The distribution of the communication antennas at the edges and the radar sensing antennas at the center position as shown in fig. 9 can be maintained as a whole.

When the foldable device is folded, communication or radar sensing may be performed through the millimeter wave antenna on the outside as shown at 601 a. When the foldable device is unfolded, the communication antenna on the outer side or the communication antenna on the inner side as shown in 601b can be selected to perform communication according to different holding postures, and the radar sensing function is realized by the antenna distributed on the inner side.

Fig. 11 is a schematic diagram of distribution positions of an antenna according to an embodiment of the present application, which is specifically applied to a notebook computer.

Referring to fig. 11, the antenna in the present application may also be applied to a large screen such as a notebook computer display screen, a desktop computer display screen, a television display screen, and the like. In the figure, 701a and 701b are millimeter wave antennas distributed at the edge of the screen for communication, and 702a, 702b and 702c are millimeter wave radar antennas distributed at the eccentric part of the screen for various different motion monitoring functions.

Referring to fig. 11, the millimeter wave radars distributed at the position 702a above the screen monitor the movement information of the head and face of the user, and the eye movement detection function can be realized. The millimeter wave radar distributed at the position of the center 702b of the screen monitors the human body large-amplitude motion information right in front of the screen, and can realize the functions of gesture recognition, user use state detection and the like. Millimeter wave radars distributed at 702c below the screen detect motion information of the larynx and chest of the user, and can achieve an auxiliary voice recognition function.

Referring to fig. 11, the millimeter wave radars 702a, 702b and 702c use different operating frequencies according to the amplitude of the monitored motion information. The amplitude of the motion monitored by 702a and 702c is small, and the amplitude of the motion monitored by 702b is large, so that the better frequency division space work can be realized.

The antenna in the application is applied to the field of motion sensing, and the acquired information is the motion data of barriers such as a human body and the like which absorb millimeter waves. Motion sensing that compares in optical camera goes on need not to acquire extra video information, and monitoring and recognition accuracy are high, and the risk that data reveal and bring is littleer, and the security is strong.

Fig. 12 is an explanatory diagram of an operation principle of a radar antenna according to an embodiment of the present application, which is specifically applied to a notebook computer.

Referring to fig. 12, when a user uses a notebook computer, the radar antennas at different positions in the screen may perform various functions such as eye movement monitoring, throat vibration monitoring, and gesture recognition. Meanwhile, the change of the position of the antenna in the screen of the user can cause the change of the precision of small-amplitude motion sensing, so that before the small-amplitude motion sensing, the user sitting posture needs to be detected by large-amplitude motion sensing first, and the radar motion sensing is realized more accurately.

Fig. 13 is a schematic diagram illustrating an antenna according to an embodiment of the present application in operation of a large display device such as a television.

Referring to fig. 13, communication antennas and radar antennas with different functions are respectively distributed at the edge and the center of the television, so as to realize radar sensing of user movement and communication with the wireless control device and the communication terminal.

The TV that carries out wireless control through antenna in the screen in this application directly communicates with wireless control equipment, compares in traditional network TV, has alleviateed intranet communication's pressure, and wireless control equipment needn't insert the network, can deal with more diversified in service behavior. Meanwhile, a millimeter wave instead of infrared remote control mode is adopted, more various wireless control devices can be compatible, and the compatible control devices can be found more easily to control under the condition that the main control devices are lost.

The sensing of user's motion is carried out through the millimeter wave radar antenna in the screen in this application to can realize functions such as gesture recognition control, user state detection. The total area of the television can be saved by adopting the motion sensing of the antenna in the screen, and compared with the optical detection sensing, the method has no privacy safety problem.

Fig. 14 is a schematic view of an embodiment in which the antenna according to one embodiment of the present application is applied to a front windshield of an automobile.

Referring to fig. 14, the arrangement of multiple antennas on the front windshield of the automobile can still adopt the form of edge distribution of communication antennas and center distribution of radar antennas. The requirements of the automobile for accessing the internet of things communication, intelligent driving and the like require that a sensing radar and a millimeter wave communication antenna with large coverage are mounted on the automobile. Because the automobile shell mainly comprises metal and has strong absorption to millimeter wave signals, the transmission loss can be reduced by mounting the millimeter wave communication antenna on the windshield.

Referring to fig. 14, the on-screen communication antennas mounted inside the windshield may be distributed at the corners of the glass, further reducing the impact on the driver's line of sight. The specific installation mode can also adopt a mode of transparent adhesive bonding, and an insulating waterproof coating is additionally coated on the outer side of the antenna to protect the antenna. Compare in the inside antenna of traditional printing at glass, the antenna in this application does not shelter from the sight, can install on front and back windshield, all can reduce transmission loss on multiple transmission direction.

Simultaneously, the millimeter wave identification label is made to the metal mesh antenna structure in this application, pastes in the glass edge to replace traditional paper subsides dress vehicle annual survey and insurance mark etc.. Compared with the traditional mark, the millimeter wave identification tag has high transparency and small influence on the sight of a driver. And counterfeiting can be further prevented by the method of binding the millimeter wave identification tag with the vehicle information.

Fig. 15 is a schematic diagram of the communication of the transparent metal mesh antenna in the windshield of the smart car.

Referring to fig. 15, a millimeter wave antenna within the windshield may communicate with nearby vehicles, fixed base stations on the curb or overhead, networked cameras at the intersection, and the like. The antennas or antenna arrays on the front windshield and the rear windshield can receive different data in a frequency division mode, so that a simultaneous multi-directional communication function is achieved.

It should be noted that the foregoing explanation of the antenna embodiment is also applicable to the setting method of the embodiment, and is not repeated herein.

According to the method for setting the antenna in the flexible transparent screen for communication and millimeter wave radar sensing, provided by the embodiment of the application, the interference between the millimeter wave radar antenna and the millimeter wave communication antenna is reduced from the spatial position, and the better simultaneous work of communication and radar sensing can be realized through beam control of the antenna under different use conditions of users.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (10)

1. A flexible transparent in-screen antenna for communication and millimeter-wave radar sensing, comprising:

the antenna is manufactured on a metal grid formed by periodically arranging polygonal basic units.

2. An antenna according to claim 1, characterized in that slot antennas and patch antennas and their antenna arrays are made on the metal grid.

3. The antenna of claim 1, wherein the operating frequency and coverage of the antenna is adjusted by adjusting the pattern of the metal mesh.

4. The antenna of claim 1,

the polygons include hexagons, rectangles, diamonds, and triangles.

5. The antenna of claim 1,

the material of the metal grid comprises silver, copper and nickel.

6. The antenna of claim 1,

the manufacturing method of the antenna comprises etching after electroplating and etching after magnetron sputtering.

7. The antenna of claim 1, further comprising: and directly cutting or etching the metal grid.

8. The antenna of claim 1, wherein the antenna is mounted over a substrate with a transparent dielectric layer backed by a transparent adhesive when the antenna is mounted in a screen.

9. An antenna according to claim 1, characterized in that it is applied to foldable or non-foldable display devices for display and inside flat glass with radar sensing or communication functions.

10. The antenna of claim 1, wherein the radar antenna and the communication antenna are disposed in a display screen at the same time, and the radar antenna is distributed in a center position of the display screen, and the communication antenna is located at an edge position of the display screen.

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