Smart light

Abstract

The application is suitable for the technical field of lamps, and provides a kind of intelligent lamp, including heat dissipation piece, light source board and radio frequency module, and the accommodating cavity with opening is formed in one end of heat dissipation piece;Light source board is set in accommodating cavity, and the light emitting side of light source board is set towards opening;Radio frequency module includes the feed structure that is set to the side of light source board away from opening;At least one of light source board and heat dissipation piece is opened with slot hole, and slot hole is used for supplying electromagnetic wave that feed structure radiates outward or the light source board and / or heat dissipation piece that is opened with slot hole is used to form coupling feed between feed structure.The intelligent lamp provided in the application, feed structure no longer extends outside light source board, avoids that feed structure forms the shelter of light, so that the light distribution of intelligent lamp is more uniform;By opening slot hole on at least one of light source board and heat dissipation piece, remote control can be realized.

Description

Technical Field

[0001] This application belongs to the field of lighting technology, and more specifically, relates to an intelligent lamp. Background Technology

[0002] With the rapid development of smart homes, various smart products are appearing in people's homes, among which smart lights are a typical application. Smart lights primarily embed a wireless communication control module into ordinary light bulbs, allowing control of the lights via wireless communication through terminal devices such as mobile phones, tablets, or remote controls.

[0003] Since metal parts can affect the radiation performance of antennas, in order to reduce the shielding effect of metal parts in the structure of smart lights on the electromagnetic waves of the antenna in the wireless communication control module, smart lights in related technologies will extend the antenna outside the light source board or directly set the antenna on the light-emitting surface of the light source board. However, such antennas will block the light emission of the lamp beads, create shadows on the lens, and produce light spots. Summary of the Invention

[0004] The purpose of this application is to provide a smart lamp to solve the technical problem that existing smart lamps will produce light spots when the antenna extends outside the light source board or is directly placed on the light-emitting surface of the light source board.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide an intelligent lamp, comprising:

[0006] A heat sink, wherein a receiving cavity with an opening at one end is formed on the heat sink;

[0007] A light source plate is disposed within the receiving cavity, with the light-emitting side of the light source plate facing the opening; and

[0008] A radio frequency module, including a power feeding structure, wherein the power feeding structure is disposed on the side of the light source board opposite to the opening;

[0009] Wherein, at least one of the light source board and the heat sink has a slot, the slot being used for the feeding structure to radiate electromagnetic waves outward; or, the light source board and / or the heat sink having the slot is used to form a coupled feeding with the feeding structure.

[0010] Optionally, the slot is a fully enclosed hole, and the perimeter C of the slot satisfies: Furthermore, the minimum distance D between the power supply structure and the edge of the slot satisfies: Where λ is the wavelength in free space.

[0011] Optionally, the slot is a semi-closed hole, and the perimeter C of the slot satisfies: Furthermore, the minimum distance D between the power supply structure and the edge of the slot satisfies: , where λ is the free space wavelength, and the perimeter C of the semi-closed hole is the perimeter calculated by adding virtual straight lines to the end of the slot.

[0012] Optionally, the impedance of the feed structure satisfies the formula: Where W is the perimeter of the feeding structure, and h is the minimum distance between the feeding structure and the edge of the slot. is the relative permittivity.

[0013] Optionally, the impedance of the feed structure is between 45Ω and 55Ω.

[0014] Optionally, the slot is a fully enclosed hole, and the perimeter C of the slot satisfies: Alternatively, the perimeter C of the slot satisfies: Alternatively, the minimum distance D between the feeding structure and the edge of the slot satisfies: , where λ is the free space wavelength.

[0015] Optionally, the slot is a semi-closed hole, and the perimeter C of the slot satisfies: Alternatively, the perimeter C of the slot satisfies: the perimeter C of the slot satisfies: Alternatively, the minimum distance D between the power supply structure and the edge of the slot satisfies: Where λ is the free space wavelength, and the perimeter C of the semi-closed hole is the perimeter calculated by adding virtual straight lines to the end of the slot.

[0016] Optionally, the smart light further includes:

[0017] A drive board is disposed within the receiving cavity and located on the side of the light source plate opposite to the opening, and the drive board is electrically connected to the light source plate;

[0018] The radio frequency module also includes a radio frequency signal processing chip, which is disposed on the surface of the light source board away from the light emission surface or on the driver board, and the radio frequency signal processing chip is connected to the power supply structure.

[0019] Optionally, the feeding structure is an antenna or a feed line. When the feeding structure is an antenna, the feeding structure radiates electromagnetic waves outward through the slot. When the feeding structure is a feed line, the feeding structure couples power to the light source board with the slot and / or the heat sink.

[0020] Optionally, the number of slots is multiple, and at least one of the slots is hollowed out; or, at least one of the slots is filled with a dielectric material, and the dielectric constant of the dielectric material is different from the dielectric constant of the light source plate or heat sink where the slot is located.

[0021] The beneficial effects of the smart light provided in this application are as follows:

[0022] 1. The power supply structure is located on the side of the light source board away from the opening, meaning that the power supply structure no longer extends outside the light source board. This avoids the power supply structure blocking the light, making the light distribution of the smart light more uniform and improving the lighting quality.

[0023] 2. By opening a slot in at least one of the light source board and the heat sink, and the slot can allow the feeding structure to radiate electromagnetic waves outward, or the light source board or heat sink with the slot can be used as a radiating patch, and wireless communication can be achieved by coupling between the radiating patch and the feeding structure. Whether the electromagnetic waves are formed by directly radiating electromagnetic waves or by coupling the feeding structure, remote control can be achieved. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art 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.

[0025] Figure 1 A three-dimensional structural diagram of the smart lamp provided in an embodiment of this application;

[0026] Figure 2 This is an exploded view of the intelligent lamp provided in the first embodiment of this application;

[0027] Figure 3 A three-dimensional structural diagram of the light source board provided in the first embodiment of this application;

[0028] Figure 4 This is a three-dimensional structural diagram of the light source board provided in the second embodiment of this application;

[0029] Figure 5 This is a three-dimensional structural diagram of the light source board provided in the third embodiment of this application;

[0030] Figure 6 This is a three-dimensional structural diagram of the light source board provided in the fourth embodiment of this application;

[0031] Figure 7 This is a three-dimensional structural diagram of the light source board provided in the fifth embodiment of this application;

[0032] Figure 8 This is a three-dimensional structural diagram of the light source plate provided in the sixth embodiment of this application;

[0033] Figure 9 A three-dimensional structural diagram of the light source plate provided in the seventh embodiment of this application;

[0034] Figure 10 A three-dimensional structural diagram of the driver board, power supply structure, and radio frequency signal processing chip provided in the embodiments of this application;

[0035] Figure 11 This is a schematic diagram of the current vector distribution structure of the slot provided in the first embodiment of this application;

[0036] Figure 12 A schematic diagram of the return loss structure of the slot provided in the first embodiment of this application;

[0037] Figure 13 This is a schematic diagram of the current vector distribution structure of the slot provided in the second embodiment of this application;

[0038] Figure 14 A schematic diagram of the return loss structure of the slot provided in the second embodiment of this application;

[0039] Figure 15 This is a schematic diagram of the current vector distribution structure of the slot provided in the third embodiment of this application;

[0040] Figure 16 A schematic diagram of the return loss structure of the slot provided in the third embodiment of this application;

[0041] Figure 17 Schematic diagram of the current vector distribution structure of the slot provided in the fourth embodiment of this application Figure 1 ;

[0042] Figure 18 Schematic diagram of the current vector distribution structure of the slot provided in the fourth embodiment of this application Figure 2 ;

[0043] Figure 19 A schematic diagram of the return loss structure of the slot provided in the fourth embodiment of this application;

[0044] Figure 20 This is a schematic diagram of the current vector distribution structure of the slot provided in the fifth embodiment of this application;

[0045] Figure 21 A schematic diagram of the return loss structure of the slot provided in the fifth embodiment of this application;

[0046] The following are the labeling elements in the figure:

[0047] 11-Heat sink; 110-Opening; 12-Outer casing;

[0048] 2-Light source board; 21-Substrate; 22-LED light source; 23-First connection terminal;

[0049] 3-RF module; 31-Feeding structure; 32-RF signal processing chip;

[0050] 4-Slots;

[0051] 5-Driver board; 51-Second connection terminal; 52-Plug-in part;

[0052] 6-Cover body;

[0053] 7-Lamp holder assembly; 71-Lamp holder; 72-Thumbtack. Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0055] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0056] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0057] Furthermore, 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, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] Please refer to the following: Figure 1 and Figure 2The smart lamp provided in the embodiments of this application will now be described. The smart lamp includes a heat sink 11, a light source board 2, and a radio frequency module 3. The components of the smart lamp will be further described below.

[0059] Specific combination Figure 2 The heat sink 11 has a cup-shaped structure and forms a receiving cavity with an opening 110 at one end. Specifically, the heat sink 11 is a cup-shaped structure with a larger cross-sectional area at one end than at the other end. The end with the larger cross-sectional area of ​​the heat sink 11 has an opening 110. The heat sink 11 is made of a metal material such as aluminum, which can effectively conduct heat.

[0060] Further integration Figure 3 and Figure 10 The light source plate 2 is disposed in the receiving cavity of the heat sink 11, and the light emitting side of the light source plate 2 is disposed facing the opening 110, so that the light emitted by the light source plate 2 can be emitted through the opening 110. The light source plate 2 includes a substrate 21 and an LED light source 22. The LED light source 22 is disposed on the surface of the substrate 21 facing the opening 110. The substrate 21 can support the LED light source 22 and provide heat dissipation for the LED light source 22, ensuring the thermal stability of the LED light source 22 under working conditions and extending the service life of the LED light source 22.

[0061] The radio frequency module 3 includes a power feeding structure 31, which is disposed on one side of the light source board 2 away from the opening 110. That is, the power feeding structure 31 can be directly disposed on the back of the light source board 2 or disposed in the receiving cavity, as long as it is disposed on one side of the light source board 2 away from the opening 110.

[0062] Furthermore, at least one of the light source board 2 and the heat sink 11 is provided with a slot 4, wherein there are three situations: the first situation is that the light source board 2 is provided with a slot 4; the second situation is that the heat sink 11 is provided with a slot 4; and the third situation is that both the light source board 2 and the heat sink 11 are provided with slots 4.

[0063] Regarding the third scenario, it is understandable that there is a possibility that when there are many LED light sources 22 on the substrate 21 or the operating frequency wavelength is long, the size of the slots 4 that can be opened on the light source board 2 may not meet the requirements. Considering that the heat sink 11 is also a metal part, the large-area metal parts such as the light source board 2 and the heat sink 11 can be equivalent to a three-dimensional whole. Therefore, slots 4 can be opened on the three-dimensional whole formed by the light source board 2 and the heat sink 11, that is, slots 4 are opened on both the light source board 2 and the heat sink 11, and the slots 4 on the light source board 2 and the slots 4 on the heat sink 11 are connected.

[0064] It should be noted that the slot 4 in the above three cases can allow the power feeding structure 31 to radiate electromagnetic waves outward, that is, the power feeding structure 31 can radiate electromagnetic waves outward through the slot 4. Here, "outward" refers to the side of the light source board 2 facing the opening 110.

[0065] Of course, the light source plate 2 and / or heat sink 11 with the above-mentioned slot 4 can form a coupled power supply with the power supply structure 31 to realize wireless communication, that is, the power supply structure 31 couples power to the light source plate 2 and / or heat sink 11 with the slot 4.

[0066] The smart light provided in this application has the following effects:

[0067] 1. The power supply structure 31 is located on the side of the light source board 2 away from the opening 110, that is, the power supply structure 31 no longer extends out of the light source board 2, thus avoiding the power supply structure 31 from blocking the light, making the light distribution of the smart lamp more uniform and improving the lighting quality.

[0068] 2. By opening a slot 4 on at least one of the light source board 2 and the heat sink 11, the slot 4 can allow the feeding structure 31 to radiate electromagnetic waves outward; or, the light source board 2 or the heat sink 11 with the slot 4 can be used as a radiating patch, and wireless communication can be achieved by using the coupling between the radiating patch and the feeding structure 31. Whether the electromagnetic waves are formed by directly radiating electromagnetic waves or by coupling the feeding method, remote control can be achieved.

[0069] Furthermore, the feeding structure 31 can be an antenna or a feed line. The antenna can be a PCB antenna, SMD patch antenna, ceramic antenna, metal wire antenna, or metal stamping antenna, etc. Based on the type of antenna, it can be classified as a dipole antenna, monopole antenna, microstrip antenna, or planar anti-phase field antenna, etc.; the feed line can be a coaxial line or a microstrip line, etc.

[0070] When the feed structure 31 functions as an antenna, it directly transmits wireless communication signals, i.e., electromagnetic waves, through the slot 4. When the feed structure 31 functions as a feed line, it guides the wireless communication signals to the slot 4. However, the feed structure 31 cannot directly transmit or receive electromagnetic waves into space; instead, it feeds power to the light source board 2 or heat sink 11 with the slot 4 via coupling. Both methods enable long-distance control, and different feed structures 31 can be selected based on specific requirements.

[0071] Please refer to one embodiment of this application as well. Figures 3 to 8 The slot 4 is an irregular shape. An irregular shape refers to a slot 4 that is not a regular slot such as a rectangle, circle or rhombus. That is, the shape whose area cannot be directly calculated by the area formula is an irregular shape. The area formula can be calculated using length and width.

[0072] It should be noted that when there are too many LEDs 22 on the light source board 2 or other requirements need to be met, it is impossible to satisfy the regular shape of the slot 4 with defined length and width in the limited space of the light source board 2. Moreover, when the slot 4 designed on the light source board 2 is too long, it will also cause the light source board 2 to deform when it is riveted to the heat sink 11. Based on this, in order to meet the requirements of designing an omnidirectional antenna in a limited space, it is necessary to design an irregularly shaped slot 4 and define the size of the slot 4 by its perimeter. By changing the size of the perimeter of the slot 4, the effective path of the induced current of the feeding structure 31 can be changed. This not only enables the feeding structure 31 to achieve multi-band, omnidirectional and circular polarization characteristics, but also solves the problems of riveting deformation and limited space on the light source board 2.

[0073] Of course, in other embodiments, see details. Figure 9 The slot 4 can be a regular shape, and can be selected according to specific needs. There are no restrictions here.

[0074] In one embodiment of this application, the slot 4 is a fully enclosed hole. Fully enclosed means that the slot 4 is not connected to the outer edge of the light source board 2 or the heat sink 11. The light source board 2 and the heat sink 11 with the slot 4 are defined as radiation patches.

[0075] For a fully enclosed slot 4, the perimeter of slot 4 is defined as C, the minimum distance between the feed structure 31 and the edge of slot 4 is defined as D, the minimum slot width of slot 4 is defined as W, and λ is the free space wavelength. The perimeter C of slot 4 satisfies: And the minimum distance between the power supply structure 31 and the edge of the slot 4 satisfies: At this point, the slot 4 on the radiating patch will couple with the feeding structure 31 to induce a current, and wireless communication can be achieved using this radiating patch and the feeding structure 31. A small portion of electromagnetic waves can pass through the slot 4 to achieve wireless communication with the feeding structure 31. This avoids the situation where the minimum distance between the feeding structure 31 and the edge of the slot 4 is insufficient. At that time, or, the perimeter of slot 4 At that time, or, the perimeter of slot 4 At this time, the current induced by the feeding structure 31 through the slot 4 on the light source board 2 is relatively small, which affects the wireless communication performance.

[0076] The following examples illustrate the relationship between the perimeter C of fully enclosed slots 4 of different shapes and the wavelength λ:

[0077] Example 1:

[0078] See details Figure 11 and Figure 12Electromagnetic simulation software determined the resonant frequency of this example to be 5.17 GHz, corresponding to a wavelength of 58 mm. The resonant frequency is determined by... Figure 12 The return loss in the medium can be directly obtained, and then the wavelength can be calculated using λ=u / f, where λ is the wavelength, u is the wave speed, and f is the frequency. The wave speed is calculated based on the propagation speed in vacuum, 3×10^8 m / s. It should be noted that the wave speed in the medium is the propagation speed in vacuum divided by the dielectric constant. The radius of the circular slot 4 is 20mm, so its perimeter is 125.7mm, which is approximately equal to 2.17 wavelengths, satisfying the perimeter requirement. ,Depend on Figure 11 It can be seen that the induced current in the slot 4 is small, so the radiation capability of the radiating patch is weak. At this time, wireless communication is mainly achieved by the electromagnetic waves radiated by the antenna on the wireless communication module passing through the slot 4 for direct communication.

[0079] Example 2:

[0080] See details Figure 13 and Figure 14 Electromagnetic simulation software determined the resonant frequency of this example to be 2.72 GHz, corresponding to a wavelength of 110.2 mm. The resonant frequency is determined by... Figure 14 The return loss can be directly obtained, and the wavelength can be calculated using λ=u / f, where λ is the wavelength, u is the wave speed, and f is the frequency. The wave speed is calculated based on the propagation speed in vacuum, 3×10^8 m / s. It should be noted that the wave speed in the medium is the propagation speed in vacuum divided by the dielectric constant. The perimeter of slot 4 can be calculated to be 110.6 mm, approximately equal to one wavelength, satisfying perimeter C≤2λ. The omnidirectional antenna pattern can then be achieved by adjusting the size of the perimeter of slot 4. Since the effective current path cannot be defined using length and width for irregular slots, and the antenna pattern requirements cannot be achieved by adjusting the length and width in a regular slot 4, the omnidirectional antenna pattern or other specific requirements can be achieved by adjusting the perimeter of an irregular slot 4 to reduce the mutual cancellation of currents.

[0081] Example 3:

[0082] See details Figure 15 and Figure 16 When designing a low-frequency antenna, if adjusting the length and width of a single or regular slot 4 on the light source board 2 fails to increase the effective current path, an additional slot 4 is needed to increase the effective current path. In this case, an additional slot 4 is introduced into the original single slot 4 to achieve antenna performance, thus forming an irregular slot 4. Electromagnetic simulation software evaluation shows that the resonant frequency in this embodiment is 2.6 GHz, corresponding to a wavelength of 115.4 mm. The resonant frequency is determined by... Figure 16The return loss can be directly obtained, and the wavelength can be calculated using λ=u / f, where λ is the wavelength, u is the wave speed, and f is the frequency. The wave speed is calculated based on the propagation speed in vacuum, 3×10^8 m / s. It should be noted that the wave speed in the medium is the propagation speed in vacuum divided by the dielectric constant. The perimeter of slot 4 in this embodiment can be calculated to be 131.4 mm, approximately equal to one wavelength. The perimeter of slot 4 in this embodiment satisfies perimeter C≤2λ. The omnidirectionality of the antenna pattern can then be achieved by adjusting the perimeter of slot 4.

[0083] Example 4:

[0084] See details Figures 17 to 19 When designing a circularly polarized multi-band antenna, a single slot 4 used to define the length and width cannot meet the antenna performance requirements. In this embodiment, the slot 4 is a cross slot, realizing a multi-band antenna. Electromagnetic simulation software evaluation shows that the resonant frequencies of this embodiment are 4.88 Hz and 5.53 GHz, corresponding to wavelengths of 61.4 mm and 54.2 mm, respectively. The resonant frequencies are determined by… Figure 19 The return loss can be directly obtained, and the wavelength can be calculated using λ=u / f, where λ is the wavelength, u is the wave speed, and f is the frequency. The wave speed is calculated based on the propagation speed in vacuum, 3×10^8 m / s. It should be noted that the wave speed in the medium is the propagation speed in vacuum divided by the dielectric constant. The perimeter of the slot 4 in this embodiment is calculated to be 100.2 mm. The perimeter of the slot in this embodiment satisfies perimeter C≤2λ. Furthermore, by selecting a suitable slot 4 shape, such as the cross-shaped slot in this embodiment, and appropriately adjusting the length, the slot 4 can be tuned to achieve circular polarization of the antenna pattern.

[0085] As can be seen from the above embodiments, designing the shape of the slot 4 on the radiating patch is actually designing the effective path of the current. For irregular slot 4, its perimeter is equivalent to the effective path of the induced current. In this application, the perimeter C is set to be ≤2λ. Thus, by designing the perimeter of the slot 4 with a specific shape, the current on the slot 4 can be in phase or out of phase. That is, by adjusting the size of the perimeter, the effective path of the current can be changed, so that the currents cancel each other out or superimpose each other, thereby achieving the specific requirements of the radiation pattern of the power supply structure 31.

[0086] In another embodiment, the slot 4 can be a semi-closed hole, that is, one end of the slot 4 has a groove, which communicates with the outer edge of the light source plate 2 or the heat sink 11. Hereinafter, regardless of whether the slot 4 is formed on the light source plate 2 and / or the heat sink 11, it is defined as a radiating patch:

[0087] For a semi-closed hole, the connection endpoints of the slot and the light source board 2 are introduced into a virtual straight line to close the slot 4, and the perimeter of the virtual closed slot 4 is defined as C. The perimeter C of the virtual closed slot 4 satisfies the following condition: Furthermore, the minimum distance D between the edge of the power supply structure 31 and the slot 4 satisfies the following condition: The slot 4 on the radiating patch couples with the feeding structure 31 and induces a current. Wireless communication can be achieved using this radiating patch and the feeding structure 31. A small portion of electromagnetic waves can pass through the slot 4 to achieve wireless communication with the feeding structure 31, thus avoiding the minimum distance between the feeding structure 31 and the edge of the slot 4. Or, the perimeter of the slot 4. Or, the perimeter of the slot 4. At this time, the current induced by the feeding structure 31 in the slot 4 on the light source board 2 is relatively small, and wireless communication is mainly achieved by electromagnetic waves passing directly through the slot 4.

[0088] Example 5:

[0089] See details Figure 20 and Figure 21 This embodiment provides the relationship between the perimeter of the semi-enclosed slot 4 and the wavelength. In this embodiment, the resonant frequency of the slot 4, as determined by electromagnetic simulation software, is 2.4 GHz, corresponding to a wavelength of 125 mm. The resonant frequency is determined through… Figure 21 The return loss can be directly obtained, and then the wavelength λ can be calculated using λ=u / f, where λ is the wavelength, u is the wave speed, and f is the frequency. The wave speed is calculated based on the propagation speed in vacuum, 3×10^8 m / s. It should be noted that the wave speed in the medium is the propagation speed in vacuum divided by the dielectric constant. The perimeter of the slot 4 can be calculated to be 80.8 mm, approximately equal to 0.64 wavelengths, satisfying the condition that the perimeter C of the semi-enclosed slot 4 is: At this point, the omnidirectionality of the antenna pattern can be achieved by adjusting the size of the circumference of the slot.

[0090] In one embodiment of this application, see reference Figure 6 and Figure 7 In the above embodiments, the feeding structure 31 provides power to the radiating patch through aperture coupling feeding to achieve antenna radiation. Compared with coaxial line or microstrip line, aperture coupling feeding does not require solder joints at the feeding point, has more adjustable parameters for impedance matching, and the feeding structure 31 and the radiating patch are separated from each other, that is, the feeding structure 31 is separated from the light source board 2 or the heat sink 11. By adjusting the perimeter of the slot 4 or the length of the open end of the feeding structure 31, aperture coupling feeding is easier to achieve impedance matching with the radiating patch compared with other feeding methods, thereby improving the radiation performance of the smart lamp.

[0091] Furthermore, in the aperture-coupled feeding method, the effective path perimeter of the aperture has a significant impact on both the resonant frequency and the resonant resistance. The longer the effective path perimeter of slot 4, the lower the resonant frequency. The resonant frequency and resonant impedance can be adjusted by appropriately changing the perimeter of slot 4. The impedance of this feeding structure 31 satisfies the formula: W is the perimeter of the feeding structure 31, and h is the minimum distance between the feeding structure 31 and the edge of the slot 4. is the relative permittivity.

[0092] From the above formula, it can be concluded that by adjusting the effective path perimeter W of the coupling slot 4, or by adjusting the distance h between the feeding structure 31 and the radiating patch, the feeding structure 31 can achieve impedance matching. Therefore, aperture coupling is easier to achieve impedance matching with the radiating patch than other feeding methods, thereby improving the radiation performance of the smart lamp.

[0093] Specifically, in this embodiment, the impedance of the feeding structure 31 is generally between 45Ω and 55Ω. In specific applications, the impedance of the feeding structure 31 is 45Ω, 46Ω, 47Ω, 48Ω, 49Ω, 50Ω, 51Ω, 52Ω, 53Ω, 54Ω, or 55Ω, which can be selected according to specific requirements to determine the equivalent width W in the feeding structure 31 and the spacing h between the feeding structure 31 and the radiating patch.

[0094] Of course, in other embodiments, when the feeding structure 31 is a microstrip line coupled feeding, the perimeter W of the microstrip line is generally 0.07λ, but other arbitrary lengths can also be selected, where λ is the wavelength of the center operating frequency in free space.

[0095] It should be noted that when slot 4 is a fully enclosed hole, and the perimeter C of slot 4 satisfies: At that time; or, the perimeter C of slot 4 satisfies: At that time, or, the minimum distance between the feed structure 31 and the edge of the slot 4. When λ is the free-space wavelength, the feeding structure 31 acts as an antenna, and the slot 4 is used to radiate electromagnetic waves outward from the feeding structure 31, with good electromagnetic wave radiation performance. Simultaneously, it can be understood that when the slot 4 is a semi-closed hole, and the perimeter C of the slot 4 satisfies: Alternatively, the perimeter C of the slot 4 satisfies... At that time, or, the minimum distance between the feed structure 31 and the edge of the slot 4. In this case, λ is the free-space wavelength, and the perimeter C of the semi-closed aperture is the perimeter calculated by adding a virtual straight line to the end of the slot 4. In this case, the feeding structure 31 acts as an antenna, and the slot 4 is used to allow the feeding structure 31 to radiate electromagnetic waves outwards, with good electromagnetic wave radiation performance.

[0096] In one embodiment of this application, please refer to Figure 2 In any of the above embodiments, the number of slots 4 can be multiple. When designing multiple slots 4, the perimeter of the first slot 4 can be defined as C1, the perimeter of the second slot 4 as C2, and so on, with the perimeter of the nth slot 4 being Cn. The minimum distance between the power supply structure 31 and the edge of the gap is defined as Dn, and the minimum gap width is defined as Wn. The wavelength is in free space.

[0097] In one embodiment of this application, please refer to Figure 2 In any of the above embodiments, the number of slots 4 can be multiple or one. The perimeters of the multiple slots 4 are not exactly the same and / or the minimum distance D between the feed structure 31 and the edge of the slot 4 is not exactly the same. When designing multiple slots 4, the perimeter of the first slot 4 can be defined as C1, the perimeter of the second slot 4 as C2, and so on, with the perimeter of the nth slot 4 being Cn. The minimum distance between the feed structure 31 and the edge of the slot can be defined as Dn, the minimum slot width can be defined as Wn, and λ is the free space wavelength.

[0098] Specifically, in this embodiment, when designing n fully enclosed slots 4, and m takes any value in [1, n], the perimeter C of the m-th slot 4 satisfies: And the minimum spacing between the power supply structure 31 and the edge of the slot 4 satisfies: At that time, wireless communication mainly relies on the internal power supply structure 31 of the smart lamp coupling to the radiating patch, meaning the power supply structure is designed as a feeder. Conversely, it can be understood that when the perimeter C of the m-th slot 4 satisfies: At that time; or, At that time, or, the minimum distance between the feed structure 31 and the edge of the slot 4. At that time, wireless communication mainly relies on the power supply structure 31 inside the smart lamp to radiate outward directly through the slot 4, that is, the power supply structure 31 is designed as an antenna.

[0099] Furthermore, when designing n semi-enclosed slots 4, with m taking any value in [1, n], the m-th slot 4 satisfies the following condition: Furthermore, the minimum distance D between the edge of the power supply structure 31 and the slot 4 satisfies the following condition: At that time, wireless communication mainly relies on the internal power supply structure 31 of the smart lamp coupling to the radiating patch, meaning the power supply structure 31 is designed as a feeder. Conversely, it can be understood that when the perimeter C of the m-th slot 4 satisfies: ;or, At that time, or, the minimum distance between the feed structure 31 and the edge of the slot 4. At that time, wireless communication mainly relies on the power supply structure 31 inside the smart lamp to radiate outward directly through the slot 4, that is, the power supply structure 31 is designed as an antenna.

[0100] Furthermore, the number of slots 4 is multiple, and at least one slot 4 can be hollowed out, meaning that one or more slots 4 are not filled with material. Of course, in other embodiments, at least one slot 4 can also be filled with a dielectric material, and the dielectric constant of this dielectric material is different from the dielectric constant of the light source plate 2 or heat sink 11 where the slot 4 is located. When the slot 4 is filled with a dielectric material with a different dielectric constant than the light source plate 2 or heat sink 11, λ should be corrected to match the dielectric constant. The equivalent wavelength λg in the relevant medium.

[0101] It should be noted that when there are multiple slots 4, each slot 4 is provided with a power supply structure 31. Of course, in other embodiments, multiple slots 4 can be provided with one power supply structure 31, which is not limited here.

[0102] In one embodiment of this application, see Figure 2 and Figure 10 The smart light also includes a driver board 5, which is disposed in the cavity surrounded by the heat sink 11 and the light source board 2 and is electrically connected to the light source board 2.

[0103] Furthermore, the RF module 3 also includes an RF signal processing chip 32, which is disposed on the surface of the light source board 2 opposite to the light-emitting surface; or, the RF signal processing chip 32 is disposed on the driver board 5; the power supply structure 31 is disposed on the RF signal processing chip 32 and electrically connected to the RF signal processing chip 32. In this way, on the one hand, the space inside the heat sink 11 can be used reasonably, avoiding the occupation of the space on the light-emitting side of the light source board 2, thereby avoiding shading; on the other hand, the temperature can be controlled within the operating temperature range of the RF module 3, thereby ensuring the normal operation of the RF module 3.

[0104] Of course, in other embodiments, the difference from the above embodiments is that the RF signal processing chip 32 in this embodiment does not have a power supply structure 31. The RF signal processing chip 32 is responsible for processing RF signals, and the power supply structure 31 can be disposed on the light source board 2, avoiding the RF signal processing chip 32. That is, the power supply structure 31 and the RF signal processing chip 32 are disposed side by side on the light source board 2. Alternatively, the power supply structure 31 can be disposed on the driver board 5, avoiding the RF signal processing chip 32. That is, the power supply structure 31 and the RF signal processing chip 32 are disposed side by side on the driver board 5. Of course, the power supply structure 31 can be disposed in any other part, as long as it is not disposed on the RF signal processing chip 32. In this way, the following effects can be achieved:

[0105] (1) It can make reasonable use of the space inside the heat sink 11, avoid occupying the space on the light-emitting side of the light source board 2, and thus avoid causing shadows;

[0106] (2) The temperature can be controlled within the operating temperature range of the RF module 3, thereby ensuring the normal operation of the RF module 3;

[0107] (3) The separate power supply structure 31 can make more effective use of the internal space. Compared with the RF signal processing chip 32 with its own power supply structure 31, it is easier to design and tune the power supply structure 31 to the working frequency band, so that the design of the slot 4 is not restricted. That is, the slot 4 can be designed at any appropriate position and the slot 4 can be powered by the independently set power supply structure 31.

[0108] Further, see Figure 3 and Figure 10 The substrate 21 of the light source board 2 has a first connecting terminal 23 on its surface facing the opening 110. The drive board 5 has a second connecting terminal 51 electrically connected to the first connecting terminal 23. A through hole is formed on the substrate 21, through which the second connecting terminal 51 passes and is electrically connected to the first connecting terminal 23. The first connecting terminal 23 is a female terminal, and the second connecting terminal 51 is a male terminal. Of course, in other embodiments, the first connecting terminal 23 is a male terminal, and the second connecting terminal 51 is a female terminal. The first connecting terminal 23 and the second connecting terminal 51 can be electrically connected using other mating methods, which are not limited here.

[0109] Specifically, in this embodiment, the drive board 5 is also provided with a plug-in portion 52 that is plugged into the substrate 21. The plug-in portion 52 has a columnar structure, and the substrate 21 is provided with a through hole for the plug-in portion 52 to pass through. The plug-in portion 52 passes through the through hole to achieve a stable connection between the drive board 5 and the substrate 21.

[0110] In one embodiment of this application, see [link to specific example]. Figure 1 and Figure 2The smart lamp also includes a cover 6, a housing 12, and a lamp head assembly 7. The other components of the smart lamp will be further described below.

[0111] See details Figure 2 The outer casing 12 surrounds the heat sink 11 and can isolate the heat sink 11 from the user, thereby preventing the user from getting an electric shock after touching it.

[0112] The cover 6 is placed on the end of the outer shell 12 facing the opening 110, thereby protecting the drive board 5, the light source board 2 and the power supply structure 31. In order to ensure the transmission of wireless communication signals, the cover 6 is made of non-metallic material, and in order to facilitate light output, the cover 6 is made of light-transmitting material. The light-transmitting material can be a polymer material such as PP (polypropylene), PC (polycarbonate) or PE (polyethylene), which can ensure high light transmittance and thus make the light output uniform.

[0113] The lamp head assembly 7 is connected to the end of the housing 12 away from the cover 6 and extends into the housing 12 to be electrically connected to the drive board 5. The lamp head assembly 7 includes a lamp head 71 and a thumbtack 72. The lamp head 71 is screwed to the housing 12 and the thumbtack 72 is inserted into the lamp head 71. The thumbtack 72 is used to electrically connect to an external power source, so that the drive circuit input on the light source board 2 can be stably connected to the external power source.

[0114] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A smart lamp, characterized in that: include: A heat sink, wherein a receiving cavity with an opening at one end is formed on the heat sink; A light source plate is disposed within the receiving cavity, with the light-emitting side of the light source plate facing the opening; as well as A radio frequency module, including a power feeding structure, wherein the power feeding structure is disposed on the side of the light source board opposite to the opening; Wherein, at least one of the light source board and the heat sink has a slot, the slot being used for the feeding structure to radiate electromagnetic waves outward; or, the light source board and / or the heat sink with the slot are used to form a coupled feeding with the feeding structure; the number of slots is one; or, the number of slots is multiple, and the perimeter C of the multiple slots is not exactly the same and / or the minimum distance D between the feeding structure and the edge of the slot is not exactly the same; The number of slots is multiple, and at least one of the slots is hollowed out; or, at least one of the slots is filled with a dielectric material, and the dielectric constant of the dielectric material is different from the dielectric constant of the light source plate or heat sink where the slot is located.

2. The smart lamp as described in claim 1, characterized in that: The slot is a fully enclosed hole, and the perimeter C of the slot satisfies: Furthermore, the minimum distance D between the power supply structure and the edge of the slot satisfies: Where λ is the wavelength in free space.

3. The smart lamp as described in claim 1, characterized in that: The slot is a semi-closed hole, and the perimeter C of the slot satisfies: Furthermore, the minimum distance D between the power supply structure and the edge of the slot satisfies: , where λ is the free space wavelength, and the perimeter C of the semi-closed hole is the perimeter calculated by adding virtual straight lines to the end of the slot.

4. The intelligent lamp as described in any one of claims 1 to 3, characterized in that: The impedance of the feeding structure satisfies the formula: Where W is the perimeter of the feeding structure, and h is the minimum distance between the feeding structure and the edge of the slot. is the relative permittivity.

5. The smart lamp as described in claim 4, characterized in that: The impedance of the power supply structure is between 45Ω and 55Ω.

6. The smart lamp as described in claim 1, characterized in that: The slot is a fully enclosed hole, and the perimeter C of the slot satisfies: Alternatively, the perimeter C of the slot satisfies: Alternatively, the minimum distance D between the feeding structure and the edge of the slot satisfies: , where λ is the free space wavelength.

7. The smart lamp as described in claim 1, characterized in that: The slot is a semi-closed hole, and the perimeter C of the slot satisfies: ; Alternatively, the perimeter C of the slot satisfies: The perimeter C of the slot satisfies: ; Alternatively, the minimum distance D between the power supply structure and the edge of the slot satisfies: Where λ is the free space wavelength, and the perimeter C of the semi-closed hole is the perimeter calculated by adding virtual straight lines to the end of the slot.

8. The intelligent lamp as described in any one of claims 1 to 3 and any one of claims 5 to 7, characterized in that: The smart light also includes: A driving board is disposed within the receiving cavity and located on the side of the light source board opposite to the opening, and the driving board is electrically connected to the light source board; the radio frequency module further includes a radio frequency signal processing chip disposed on the surface of the light source board opposite to the light emission surface or disposed on the driving board, and the radio frequency signal processing chip is connected to the feeding structure.

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