Antenna structure and display device

Abstract

The utility model provides an antenna structure and a display device. The antenna structure comprises a circuit board; the first antenna radiator and the second antenna radiator are arranged on the circuit board at an interval; the first selection switch is arranged on the circuit board, the first selection switch is provided with a first end, a second end and a third end, the first end is electrically connected with the first antenna radiator, and the second end is electrically connected with the second antenna radiator; and the radio frequency module is arranged on the circuit board, and the radio frequency module is connected with the third end. Through the above structure, the antenna structure can be improved to realize WIFI communication performance.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, and in particular to an antenna structure and a display device. Background Technology

[0002] Display devices, such as televisions, are typically equipped with a Wireless Fidelity (WIFI) module for communication functions such as network data transmission. Display devices can wirelessly connect to a router via an antenna structure to achieve WIFI communication.

[0003] When designing antennas for display devices, taking televisions as an example, the antenna structure is typically placed on the front frame assembly and fixedly connected to it, with the antenna radiator also in a fixed position. However, due to the non-circularity of the antenna pattern in existing antenna structures, there is a weak forward beam radiation region. Improving this requires moving the antenna radiator, which contradicts the fixed position of the antenna structure. These factors result in poor performance for Wi-Fi communication using this antenna structure. Utility Model Content

[0004] This application provides an antenna structure and a display device that can improve the performance of the antenna structure in achieving WIFI communication.

[0005] This application provides an antenna structure, including:

[0006] Circuit board;

[0007] A first antenna radiator and a second antenna radiator are disposed on the circuit board at intervals;

[0008] A first selection switch is disposed on the circuit board. The first selection switch has a first end, a second end, and a third end. The first end is electrically connected to the first antenna radiator, and the second end is electrically connected to the second antenna radiator.

[0009] The radio frequency module is mounted on the circuit board and is connected to the third terminal.

[0010] This application embodiment also provides a display device, including:

[0011] Display panel;

[0012] A front frame assembly disposed on the periphery of the display panel;

[0013] An antenna structure is provided on the front frame assembly, and the antenna structure is the antenna structure described above.

[0014] The antenna structure and display device provided in this application include a circuit board, a first antenna radiator, a second antenna radiator, a first selection switch, and a radio frequency (RF) module. The first and second antenna radiators are spaced apart and both are used for transmitting and receiving RF signals. The RF module switches between the first and second antenna radiators via the first selection switch to automatically match the antenna radiator with the better forward beam signal strength in the current environment. The display device can wirelessly connect to a router through this antenna radiator, thereby improving the performance of the antenna structure in achieving Wi-Fi communication. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is the radiation pattern of an existing antenna structure at 5 GHz.

[0017] Figure 2 This is a schematic diagram of the first structure of the antenna structure provided in the embodiments of this application.

[0018] Figure 3 This is a schematic diagram of the first equivalent circuit of the antenna structure provided in the embodiments of this application.

[0019] Figure 4 This is a schematic diagram of a second equivalent circuit for an antenna structure provided in an embodiment of this application.

[0020] Figure 5 The radiation pattern of the antenna structure provided in this embodiment at 5 GHz.

[0021] Figure 6 This is a schematic diagram of a second antenna structure provided in an embodiment of this application.

[0022] Figure 7 This is a schematic diagram of a third antenna structure provided in an embodiment of this application.

[0023] Figure 8 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0024] Figure 9 This is a schematic diagram of the equivalent circuit of the display device provided in the embodiments of this application. Detailed Implementation

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0026] Please see Figure 1 , Figure 1 This is the radiation pattern of an existing antenna structure at 5 GHz.

[0027] When designing antennas for display devices, taking televisions as an example, the antenna structure is typically placed on the front frame assembly and fixedly connected to it, with the antenna radiator also in a fixed position. However, due to the non-circularity of the antenna pattern in existing antenna structures, there is a weak forward beam radiation region. Improving this requires moving the antenna radiator, which contradicts the fixed position of the antenna structure. These factors result in poor performance for Wi-Fi communication using this antenna structure.

[0028] This application provides an antenna structure and a display device that can improve the performance of the antenna structure in achieving WIFI communication. The following is a detailed description with reference to the accompanying drawings.

[0029] Please see Figure 2 as well as Figure 3 , Figure 2 This is a schematic diagram of a first embodiment of the antenna structure provided in this application. Figure 3 This is a schematic diagram of the first equivalent circuit of the antenna structure provided in the embodiments of this application.

[0030] This application provides an antenna structure 10, which includes a circuit board 11, a first antenna radiator 12, a second antenna radiator 13, a first selection switch 14, and a radio frequency module 15. The first antenna radiator 12 and the second antenna radiator 13 are disposed on the circuit board 11 at intervals. The first selection switch 14 is disposed on the circuit board 11 and has a first terminal, a second terminal, and a third terminal. The first terminal is electrically connected to the first antenna radiator 12, the second terminal is electrically connected to the second antenna radiator 13, and the third terminal is connected to the radio frequency module 15.

[0031] The circuit board 11 can be a printed circuit board. The circuit board 11 can also integrate one or more functional components such as a microphone, speaker, distance sensor, and ambient light sensor.

[0032] The first antenna radiator 12 and the second antenna radiator 13 have different shapes, or the first antenna radiator 12 and the second antenna radiator 13 are located at different positions on the circuit board 11, resulting in different antenna patterns for the first antenna radiator 12 and the second antenna radiator 13. This allows adjustment of the first selection switch 14 to select either the first antenna radiator 12 or the second antenna radiator 13, automatically matching the antenna radiator with the better forward beam signal strength in the current environment. The display device can wirelessly connect to the router through this antenna radiator, thereby improving the performance of the antenna structure 10 in achieving WIFI communication.

[0033] The first antenna radiator 12 and the second antenna radiator 13 can be made of metal. The shapes of the first antenna radiator 12 and the second antenna radiator 13 can be three-dimensional or planar. The first antenna radiator 12 and the second antenna radiator 13 support the same frequency band, so both can operate independently. Both the first antenna radiator 12 and the second antenna radiator 13 can independently support the 5GHz frequency band or the 2.4GHz frequency band. In this embodiment, the first antenna radiator 12 and the second antenna radiator 13 supporting the 5GHz frequency band are used as an example for explanation.

[0034] The first selection switch 14 can be an antenna switching switch, or any switch that switches according to a control signal. For example, the first selection switch 14 can be a single pole double throw (SPDT) switch. The first, second, and third terminals are independently configured. The first terminal can be connected to the third terminal to electrically connect the first antenna radiator 12 to the radio frequency module 15. The second terminal can be connected to the third terminal to electrically connect the second antenna radiator 13 to the radio frequency module 15. Through the switching action of the first selection switch 14, the radio frequency module 15 can selectively connect to either the first antenna radiator 12 or the second antenna radiator 13.

[0035] The radio frequency (RF) module 15 is used to amplify and process the signal transmitted by the first antenna radiator 12 or the second antenna radiator 13 in order to improve the transmission efficiency of the antenna structure 10.

[0036] Please continue reading. Figure 1 as well as Figure 4 , Figure 4This is a second equivalent circuit diagram of the antenna structure provided in an embodiment of this application. In some embodiments, the antenna structure 10 may also support MIMO (Multiple-Input Multiple-Output) technology. To increase the number of antenna radiators in the antenna structure 10 during operation and improve the omnidirectional radiation of the antenna structure 10, the antenna structure 10 further includes a third antenna radiator 16, a fourth antenna radiator 17, and a second selection switch 18. The third antenna radiator 16 and the fourth antenna radiator 17 are spaced apart, and the third antenna radiator 16, the fourth antenna radiator 17, and the second selection switch 18 are all disposed on a circuit board 11. The second selection switch 18 has a fourth terminal, a fifth terminal, and a sixth terminal. The fourth terminal is electrically connected to the third antenna radiator 16, and the fifth terminal is electrically connected to the fourth antenna radiator 17. The radio frequency module 15 is connected to the sixth terminal.

[0037] The third antenna radiator 16 and the fourth antenna radiator 17 have different shapes, or they can be positioned at different locations on the circuit board 11, resulting in different antenna patterns. This allows the second selection switch 18 to be adjusted to select either the third or fourth antenna radiator 17, automatically matching the antenna radiator with the better forward beam signal strength in the current environment. The display device can wirelessly connect to the router through this antenna radiator, thereby improving the performance of the antenna structure 10 in achieving Wi-Fi communication.

[0038] The third antenna radiator 16 and the fourth antenna radiator 17 can be made of metal. The shapes of the third antenna radiator 16 and the fourth antenna radiator 17 can be three-dimensional or planar. The third antenna radiator 16 and the fourth antenna radiator 17 support the same frequency band, so both can operate independently. Both the third antenna radiator 16 and the fourth antenna radiator 17 can independently support the 5GHz frequency band or the 2.4GHz frequency band. This embodiment uses the third antenna radiator 16 and the fourth antenna radiator 17 supporting the 5GHz frequency band as an example for illustration.

[0039] The second selection switch 18 can be an antenna switching switch, or any switch that switches according to a control signal. For example, the second selection switch 18 can be a single-pole double-throw switch. The fourth, fifth, and sixth terminals are independently configured. The fourth terminal can be connected to the sixth terminal to electrically connect the third antenna radiator 16 to the RF module 15. The fifth terminal can be connected to the sixth terminal to electrically connect the fourth antenna radiator 17 to the RF module 15. Through the switching action of the second selection switch 18, the RF module 15 can be selectively connected to one of the third antenna radiator 16 and the fourth antenna radiator 17.

[0040] For example, both the first antenna radiator 12 and the second antenna radiator 13 can support the 5GHz frequency band, as can both the third antenna radiator 16 and the fourth antenna radiator 17. In this case, even with the switching of the first selection switch 14 and the second selection switch 18, two antenna radiators transmit and receive radio frequency signals. The antenna pattern formed by the combination of the two antenna radiators complements each other to form an envelope, thus satisfying the omnidirectional requirement.

[0041] In the 5GHz band, by controlling the selection via the first selection switch 14 and the second selection switch 18, one of the first antenna radiator 12 and the second antenna radiator 13, and one of the third antenna radiator 16 and the fourth antenna radiator 17, can be selected to achieve complementary antenna pattern filling. It can be understood that the combination of two antenna radiators can include: the first antenna radiator 12 and the third antenna radiator 16, the first antenna radiator 12 and the fourth antenna radiator 17, the second antenna radiator 13 and the third antenna radiator 16, and the second antenna radiator 13 and the fourth antenna radiator 17.

[0042] Please see Figure 5 , Figure 5 This document describes the radiation pattern of the antenna structure provided in this embodiment at 5 GHz. Taking a first antenna radiator 12 and a third antenna radiator 16 as an example, L1 represents the antenna pattern corresponding to the first antenna radiator 12, L2 represents the antenna pattern corresponding to the third antenna radiator 16, and L3 represents the complementary envelope formed by the combination of the first and third antenna radiators 12 and 16. Figure 5 As can be seen, the envelope represented by L3 can satisfy the omnidirectional requirement.

[0043] Please continue reading. Figure 2The first antenna radiator 12 and the third antenna radiator 16 are arranged in a mirror-symmetric configuration, and the second antenna radiator 13 and the fourth antenna radiator 17 are also arranged in a mirror-symmetric configuration relative to the first antenna radiator 12 and the third antenna radiator 16. It can be understood that the first antenna radiator 12 and the third antenna radiator 16 are structurally mirror-symmetric, and the second antenna radiator 13 and the fourth antenna radiator 17 are not only structurally mirror-symmetric but also positionally symmetrical relative to the first antenna radiator 12 and the third antenna radiator 16. This symmetrical design of the antenna radiators in the antenna structure 10 facilitates the complementary formation of the antenna radiation patterns to form an envelope, thereby meeting the omnidirectional requirement.

[0044] The first antenna radiator 12, the second antenna radiator 13, the third antenna radiator 16, or the fourth antenna radiator 17 are PIFA (Planar Inverted F-shaped Antenna) antennas. PIFA antennas are planar antennas. Compared to three-dimensional antennas, planar antennas are smaller, occupy less space, and can achieve high-energy radiation.

[0045] Please see Figure 6 as well as Figure 7 , Figure 6 This is a schematic diagram of a second antenna structure provided in an embodiment of this application. Figure 7 This is a schematic diagram of a third antenna structure provided in an embodiment of this application. The circuit board 11 has a first side and a second side facing each other. The first antenna radiator 12, the second antenna radiator 13, the third antenna radiator 16, and the fourth antenna radiator 17 are disposed on the first side of the circuit board 11. The antenna structure 10 also includes a plurality of grounding points 19 disposed on the second side of the circuit board 11. It is understood that the placement of the grounding points 19 can control the change in the radiation pattern of the antenna structure 10. By placing the grounding points 19 in appropriate locations, the signal strength of the forward beam emitted by the antenna structure 10 can be adjusted, thereby improving the signal strength of the forward beam emitted by the antenna structure 10.

[0046] The antenna structure 10 also includes a fifth antenna radiator 110, which is mounted on the circuit board 11. The number of fifth antenna radiators 110 can be one or more. The fifth antenna radiator 110 is electrically connected to the radio frequency module 15. The fifth antenna radiator 110 can support the 2.4 GHz band. In some cases, the first antenna radiators 12 to the fourth antenna radiators 17 can all support the 5 GHz band, while the fifth antenna radiator 110 can support the 2.4 GHz band. Therefore, segmenting the high-frequency band (5 GHz) and the low-frequency band (2.4 GHz) allows for more precise adjustment of the radio frequency signal emitted by the antenna structure 10, and allows for setting the radiation patterns of the antenna radiators corresponding to different frequency bands, which is beneficial for signal transmission.

[0047] When the fifth antenna radiator 110 only supports the 2.4GHz frequency band, the radio frequency signals transmitted and received by the fifth antenna radiator 110 have strong diffraction capability and narrow frequency band, so the fifth antenna radiator 110 can be used in the form of a single antenna.

[0048] Please continue reading. Figure 8 , Figure 8 This is a schematic diagram of the structure of the display device provided in the embodiments of this application.

[0049] This application embodiment also provides a display device 100, which can be a television set.

[0050] The display device 100 also includes a display panel 30, a front frame assembly 20, and an antenna structure 10. The front frame assembly 20 is disposed around the periphery of the display panel 30, and the antenna structure 10 is disposed on the front frame assembly 20. The antenna structure 10 is the antenna structure 10 described in the above embodiment. The display device 100 can wirelessly connect to a router via the antenna structure 10 to achieve WIFI communication.

[0051] Please see Figure 9 , Figure 9This is a schematic diagram of the equivalent circuit of the display device provided in the embodiments of this application. The display device 100 also includes a processing chip 40, which is connected to the radio frequency module 15 and the first selection switch 14. The processing chip 40 can control the first selection switch 14 to select and connect the first antenna radiator 12 and the second antenna radiator 13 based on the signal quality, such as the signal strength, of the radio frequency signals received by the first antenna radiator 12 and the second antenna radiator 13 obtained by the radio frequency module 15. For example, when the processing chip 40 receives a signal from the radio frequency module 15, if the signal strength of the signal pointing to the first antenna radiator 12 is greater than the signal strength of the second antenna radiator 13, the processor can control the first selection switch 14 so that the third terminal of the first selection switch 14 is connected to the first terminal, and the antenna structure 10 uses the first antenna radiator 12 to transmit and receive radio frequency signals.

[0052] The antenna structure 10 also includes a third antenna radiator 16, a fourth antenna radiator 17, and a second selection switch 18. The third antenna radiator 16 and the fourth antenna radiator 17 are spaced apart and are all mounted on a circuit board 11. The second selection switch 18 has a fourth terminal, a fifth terminal, and a sixth terminal. The fourth terminal is electrically connected to the third antenna radiator 16, and the fifth terminal is electrically connected to the fourth antenna radiator 17. The radio frequency module 15 is connected to the sixth terminal. The processing chip 40 is also connected to the second selection switch 18.

[0053] The processing chip 40 can control both the first selection switch 14 and the second selection switch 18. Specifically, the RF module 15 sends signal quality information of each antenna radiator, such as RSSI (Received Signal Strength Indicator) information or NSR (Non-Stop Routing Standard) information, to the processing chip 40. After obtaining this signal quality information, the processing chip 40 controls the first selection switch 14 and the second selection switch 18 to select two antenna radiators for wireless connection with the router. This ensures that the total RF signal of the antenna structure 10 meets the omnidirectional requirement and also improves the quality of the RF signal of the antenna structure 10.

[0054] The display device 100 also includes a spring clip that connects to the front frame assembly 20 and the antenna structure 10. The spring clip is made of metal to improve the reliability of the connection between the front frame assembly 20 and the antenna structure 10. The spring clip also acts as a shock absorber for the antenna structure 10 to prevent damage to the delicate antenna radiators on the antenna structure 10 during movement or vibration of the display device 100.

[0055] The antenna structure 10 and display device 100 provided in this application embodiment include a circuit board 11, a first antenna radiator 12, a second antenna radiator 13, a first selection switch 14, and a radio frequency module 15. The first antenna radiator 12 and the second antenna radiator 13 are spaced apart and both are used to transmit and receive radio frequency signals. The radio frequency module 15 switches between the first antenna radiator 12 and the second antenna radiator 13 via the first selection switch to automatically match the antenna radiator with better forward beam signal strength in the current environment. The display device 100 can wirelessly connect to a router through this antenna radiator, thereby improving the performance of the antenna structure in achieving WIFI communication.

[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0057] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0058] The antenna structure and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An antenna structure, characterized in that, include: Circuit board; A first antenna radiator and a second antenna radiator are disposed on the circuit board at intervals; A first selection switch is disposed on the circuit board. The first selection switch has a first end, a second end, and a third end. The first end is electrically connected to the first antenna radiator, and the second end is electrically connected to the second antenna radiator. The radio frequency module is mounted on the circuit board and is connected to the third terminal.

2. The antenna structure according to claim 1, characterized in that, It also includes a third antenna radiator, a fourth antenna radiator, and a second selection switch. The third antenna radiator and the fourth antenna radiator are spaced apart. The third antenna radiator, the fourth antenna radiator, and the second selection switch are all mounted on the circuit board. The second selection switch has a fourth terminal, a fifth terminal, and a sixth terminal. The fourth terminal is electrically connected to the third antenna radiator, the fifth terminal is electrically connected to the fourth antenna radiator, and the radio frequency module is connected to the sixth terminal.

3. The antenna structure according to claim 2, characterized in that, The first antenna radiator and the third antenna radiator are arranged in a mirror symmetric manner, and the second antenna radiator and the fourth antenna radiator are arranged in a mirror symmetric manner with respect to the first antenna radiator and the third antenna radiator.

4. The antenna structure according to claim 3, characterized in that, The first antenna radiator, the second antenna radiator, the third antenna radiator, or the fourth antenna radiator are PIFA antennas.

5. The antenna structure according to claim 3, characterized in that, The circuit board has a first side and a second side, and the first antenna radiator, the second antenna radiator, the third antenna radiator and the fourth antenna radiator are disposed on the first side of the circuit board; the antenna structure also includes a plurality of grounding points, which are disposed on the second side of the circuit board.

6. The antenna structure according to any one of claims 1 to 5, characterized in that, It also includes a fifth antenna radiator, which is disposed on the circuit board and electrically connected to the radio frequency module.

7. A display device, characterized in that, include: Display panel; A front frame assembly disposed on the periphery of the display panel; An antenna structure is disposed on the front frame assembly, and the antenna structure is the antenna structure according to any one of claims 1 to 6.

8. The display device according to claim 7, characterized in that, It also includes a processing chip, which is connected to the radio frequency module and the first selection switch respectively.

9. The display device according to claim 8, characterized in that, The antenna structure further includes a third antenna radiator, a fourth antenna radiator, and a second selection switch. The third and fourth antenna radiators are spaced apart. The third antenna radiator, the fourth antenna radiator, and the second selection switch are all mounted on the circuit board. The second selection switch has a fourth terminal, a fifth terminal, and a sixth terminal. The fourth terminal is electrically connected to the third antenna radiator, the fifth terminal is electrically connected to the fourth antenna radiator, and the radio frequency module is connected to the sixth terminal. The processing chip is also connected to the second selection switch.

10. The display device according to claim 7, characterized in that, It also includes spring clips, which are connected to the front frame assembly and the antenna structure, respectively.

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