Smart Lights

Abstract

The present invention belongs to the field of lighting technology, and provides a smart lamp, including a lamp holder, a lamp body and a coupling antenna; the lamp holder and the lamp body are tightly connected, and the coupling antenna is fixed in the lamp body; the lamp holder includes a spiral area away from the lamp body and a non-spiral area close to the lamp body, and through holes are provided on the non-spiral area and the lamp body, and when the lamp holder and the lamp body are tightly connected, the coupling antenna, the through holes on the lamp body and the through holes on the non-spiral area correspond to each other. The present invention can improve the overall performance and aesthetics of the smart lamp.

Description

Technical Field

[0001] The present invention belongs to the field of lighting technology, and more specifically, relates to an intelligent lamp. Background Art

[0002] There are various types of IoT smart lights currently sold on the market. The IoT smart lights mainly include a power module, a lighting module, a signal transceiver module and a product structure module, among which the signal transceiver module is composed of a radio frequency module and an antenna.

[0003] Existing products mainly feature RF modules and antennas integrated into a separate PCB board or in a corner of the driver board, which leads to certain problems: when the power module uses larger metal components such as large capacitors and inductors, they reflect electromagnetic waves, thereby affecting the antenna radiation directivity, reducing the antenna radiation efficiency, and affecting the electromagnetic compatibility of the entire machine; the metal mortise and light source board in the lighting module interfere with the antenna radiation due to the coupling effect, causing antenna radiation energy loss; the antenna design in the signal transceiver module needs to pass through the light source board, resulting in antenna shadows, affecting normal light flux, and also affecting the overall appearance of the product. Summary of the invention

[0004] In view of this, the present invention provides a smart lamp to solve the problem that the antenna position design in the existing IoT smart lamp is unreasonable, which affects the overall performance and appearance of the product.

[0005] The smart lamp provided by the embodiment of the present invention includes:

[0006] Lamp holder, lamp body and coupling antenna;

[0007] The lamp holder and the lamp body are tightly connected, and the coupling antenna is fixed in the lamp body;

[0008] The lamp holder includes a spiral area away from the lamp body and a non-spiral area close to the lamp body. Both the non-spiral area and the lamp body are provided with through holes. When the lamp holder and the lamp body are tightly connected, the positions of the coupling antenna, the through holes on the lamp body and the through holes on the non-spiral area correspond.

[0009] In combination with the first aspect, in a possible implementation manner of the first aspect, the through holes on the non-spiral area are sealed and filled with a non-metallic material having waterproof properties.

[0010] In combination with the first aspect, in a possible implementation of the first aspect, the coupling antenna is integrated at an end of the smart lamp driver board away from the driver circuit, and a driver board slot is provided in the lamp body;

[0011] The smart lamp driver board is fixed in the lamp body through the driver board slot.

[0012] In combination with the first aspect, in a possible implementation of the first aspect, the coupling antenna is integrated into an independent signal transceiver board, and a signal transceiver board slot is provided in the lamp body;

[0013] The signal transceiver board is fixed in the lamp body through the signal transceiver board slot.

[0014] In combination with the first aspect, in a possible implementation manner of the first aspect, the shapes and sizes of the non-helical region and the through hole on the lamp body are determined by coupling parameters of the coupling antenna.

[0015] In combination with the first aspect, in a possible implementation manner of the first aspect, when the lamp cap and the lamp body are tightly connected, the distance between the coupling antenna and the through hole on the non-helical area is 2 mm-4 mm.

[0016] In combination with the first aspect, in a possible implementation manner of the first aspect, the smart light further includes:

[0017] Lighting components, power components and RF modules;

[0018] The lighting component, power component and radio frequency module are all located inside the lamp body. The lighting component and radio frequency module are both connected to the power component, and the radio frequency module is connected to the coupling antenna.

[0019] Furthermore, the distance between the coupling antenna and the lighting component and the power supply component is greater than a preset distance threshold, wherein the distance threshold is 10 mm.

[0020] In combination with the first aspect, in a possible implementation manner of the first aspect, the smart light further includes:

[0021] Heat dissipation components;

[0022] The heat dissipation component is located in the lamp body, and the heat dissipation component is any one of the following: an air-cooled radiator, a water-cooled radiator, a heat pipe radiator, or a semiconductor refrigerator.

[0023] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0024] The embodiment of the present invention provides through holes in the non-spiral area near the lamp body and on the lamp body of the smart lamp, so that the positions of the coupling antenna, the through hole on the lamp body and the through hole on the non-spiral area correspond to each other, thereby realizing beam adjustment, effectively improving the overall performance of the antenna and reducing unnecessary energy loss; and, a suitable area is reserved on the lamp head side to set the coupling antenna, which not only solves the antenna shadow problem, but also does not affect the normal function of the product to receive and send signals. At the same time, this area is also far away from large metal devices in the power module and the mortise-covered light source board in the lighting module, etc., so that the antenna has a better radiation space, which improves the radiation performance of the antenna. The present invention can improve the overall performance and aesthetics of the smart lamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of the smart lamp provided in the embodiment of the present invention Figure 1 ;

[0026] Figure 2 A schematic diagram of the structure of the smart lamp provided in the embodiment of the present invention Figure 2 ;

[0027] Figure 3 A schematic diagram of the structure of the smart lamp provided in the embodiment of the present invention Figure 3 ;

[0028] Figure 4 A schematic diagram of an equivalent circuit of a coupled antenna provided in an embodiment of the present invention;

[0029] Figure 5 The simulation results provided by the embodiment of the present invention Figure 1 ;

[0030] Figure 6 The simulation results provided by the embodiment of the present invention Figure 2 ;

[0031] Figure 7 The simulation results provided by the embodiment of the present invention Figure 3 ;

[0032] Figure 8 The simulation results provided by the embodiment of the present invention Figure 4 ;

[0033] Fig. 9 The simulation results provided by the embodiment of the present invention Figure 5 . DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] Please also read Figure 1-Figure 3 As shown, the smart lamp provided by the present invention is now described.

[0036] The smart lamp of this embodiment includes: a lamp holder 10 , a lamp body 20 and a coupling antenna 30 .

[0037] The lamp holder 10 and the lamp body 20 are tightly connected, and the coupling antenna 30 is fixed inside the lamp body 20 .

[0038] The lamp cap 10 includes a spiral region 11 away from the lamp body and a non-spiral region 12 close to the lamp body. The non-spiral region 12 and the lamp body 20 are both provided with through holes (the through holes on the non-spiral region 12 are as shown in FIG. Figure 1 The through hole 13 shown can be designed as a shape of an antenna gap. When the lamp holder 10 and the lamp body 20 are tightly connected, the positions of the coupling antenna 30, the through hole on the lamp body 20 and the through hole 13 on the non-spiral area 12 correspond.

[0039] In this embodiment, the spiral area 11 is used to combine with the lamp holder to achieve the installation of the smart lamp. Part of the lamp body 20 can be nested in the lamp holder 10 to achieve a close combination of the lamp holder 10 and the lamp body 20. The shape and size of the through hole can be set according to requirements. For example, Figure 1 In the embodiment, the slotted antenna technology is adopted to slot the copper-nickel-plated spiral lamp holder, and the through hole 13 can be designed into the shape of the antenna slot.

[0040] The coupling antenna 30 can be a combination of any form of metal antenna and coupling branch, which is set at any position below the antenna gap. The metal material can be fixedly installed in the form of printing or plug-in, and the antenna pattern can be designed in the antenna layout area. A certain distance L is reserved between the coupling antenna 30 and the through hole 13. Preferably, the value range of L is between 2mm-4mm. The distance L can be adjusted according to actual conditions. Taking candle lamp as an example, L is 2.5mm.

[0041] At the same time, in order to achieve a better radiation performance of the coupling antenna 30, the lamp body 20 can be opened according to the product shape and the size of the antenna design area to ensure that the area between the upper area of ​​the coupling antenna 30 and the through hole 13 of the lamp holder 10 is not covered by the plastic lamp body.

[0042] Since the present embodiment reserves a suitable antenna arrangement area on the lamp holder side to design the antenna, this area is generally far away from the large components of the power supply assembly and the lighting assembly (the distance exceeds 10 mm), so the antenna clearance area is good and it is easy to reflect the antenna performance. In addition, the spatial layout of this area can be adjusted according to the lamp holder design of the product, and it has strong plasticity and adaptability. In addition, the through hole 13 is located in the non-spiral area 12 where the lamp holder is connected to the lamp holder. This position will not be covered by the lamp holder, and the through hole 13 avoids the area where the lamp holder is fixed to the plastic lamp body.

[0043] It can be seen that the embodiment of the present invention provides through holes in the non-spiral area near the lamp body and on the lamp body of the smart lamp, so that the positions of the coupling antenna, the through hole on the lamp body and the through hole on the non-spiral area correspond to each other, thereby realizing beam adjustment, effectively improving the overall performance of the antenna, and reducing unnecessary energy loss; and, a suitable area is reserved on the lamp head side to set the coupling antenna, which not only solves the antenna shadow problem, but also does not affect the normal function of the product to receive and send signals. At the same time, this area is also far away from large metal components in the power module and the mortise-covered light source board in the lighting module, etc., so that the antenna has a better radiation space, which improves the radiation performance of the antenna. The present invention can improve the overall performance and aesthetics of smart lamps.

[0044] As a possible implementation manner, the through hole 13 on the non-spiral area 12 is sealed and filled with a non-metallic material having waterproof properties.

[0045] In this embodiment, plastic material or other waterproof non-metallic material can be embedded in the through hole 13, so that the plastic material or other waterproof non-metallic material and the slit lamp holder 10 form a new whole, so as to ensure the mechanical strength and waterproof performance of the spiral lamp holder and realize the overall sealing of the smart lamp.

[0046] As a possible implementation, see Figure 2 As shown, the coupling antenna 30 can be integrated into one end of the smart lamp driving board 31 away from the driving circuit, and at the same time, a driving board slot is provided in the lamp body 20, and the smart lamp driving board 31 is fixed in the lamp body 20 through the driving board slot. Alternatively, as a possible implementation, the coupling antenna 30 can also be integrated into an independent signal transceiver board, and a signal transceiver board slot is provided in the lamp body 20, and the signal transceiver board is fixed in the lamp body 20 through the signal transceiver board slot.

[0047] In this embodiment, the coupling antenna 30 is designed separately from the driving circuit, and a certain distance is maintained between the two, which can prevent the driving circuit from affecting the coupling antenna 30. In addition, a card slot is required inside the lamp body 20 to fix the carrier plate of the coupling antenna 30, ensuring that the distance L between the coupling antenna 30 and the lamp head 10 is constant.

[0048] As a possible implementation manner, the shapes and sizes of the through holes 13 on the non-helical region 12 and the through holes on the lamp body 20 may be determined by the coupling parameters of the coupling antenna 30 .

[0049] In this embodiment, the shape, position and size of the through hole can be adjusted according to actual needs, so as to achieve beam adjustment and effectively improve the overall performance of the antenna.

[0050] Specifically, when the distance between the antenna and the through hole 13 decreases, the resonance point is biased upward; when the distance between the antenna and the through hole 13 increases, the resonance point is biased downward.

[0051] The relationship between the coupling antenna, the through hole 13, and the antenna size is as follows: when the distance between the coupling antenna and the through hole 13 is small, the antenna operating frequency (antenna resonance point) is high, the required antenna design area is relatively small, and the through hole is correspondingly small; conversely, when the distance between the coupling antenna and the through hole 13 is large, the antenna operating frequency (antenna resonance point) is low, the required antenna design area is relatively large, and the through hole is correspondingly large. Taking a candle lamp as an example, the size of the through hole 13 is 0.5mm*7mm, and the size of the through hole on the lamp body 20 is 6.5mm*8mm.

[0052] In view of the above, compared with conventional designs, this embodiment has the following advantages:

[0053] (1) A suitable area is reserved on the lamp head side to design a slot coupling antenna, which not only solves the antenna shadow problem, but also does not affect the normal function of the product to receive and send signals. It also provides a new idea for solving the design of smart lamp antennas. At the same time, this area is far away from large metal components in the power module and the mortise light source board in the lighting module, so the antenna has a good radiation space, which improves the radiation performance of the antenna.

[0054] (2) The slot-coupled antenna design optimizes the design of a single antenna to form a combination of multiple antennas. This is mainly reflected in the design of the coupling branch, which can effectively adjust the inductive performance of the antenna impedance. The design of the curved slot has a high aperture utilization rate and is a new type of aperture antenna. At the same time, the slot-coupled antenna design can achieve beam adjustment, effectively improve the overall performance of the antenna, and reduce unnecessary capacity loss.

[0055] (3) The coupling antenna can be made in the form of PCB, silver paste printing or laser engraving, while the waveguide gap is made by opening a gap on the original copper-plated nickel spiral lamp head. The gap is embedded in plastic or other waterproof non-metallic materials to ensure the mechanical strength and waterproof performance of the overall product without affecting the overall appearance of the product.

[0056] As a possible implementation method, the smart light also includes:

[0057] Lighting components, power components and RF modules.

[0058] The lighting component, the power component and the radio frequency module are all located inside the lamp body 20 . The lighting component and the radio frequency module are both connected to the power component, and the radio frequency module is connected to the coupling antenna 30 .

[0059] The smart lamp further includes a heat dissipation component, which is located in the lamp body 20 and is any one of the following: an air-cooled radiator, a water-cooled radiator, a heat pipe radiator, or a semiconductor refrigerator.

[0060] In this embodiment, the smart lamp is mainly composed of a lamp body 20, a lighting component, a power component, a heat dissipation component, a copper-nickel-plated lamp holder 10 and a thumbtack.

[0061] The lighting component is connected to the power supply component through a power cord and emits light; the power supply component converts AC power into DC power to power the RF module and the lighting component; the RF module converts high-frequency electromagnetic signals in space into high-frequency current signals on the circuit board to realize the user's control function; the heat dissipation component is used to dissipate heat to prevent the bulb from overheating and burning due to working for too long; the lamp holder and thumbtack are used to connect the bulb to the user's lamp holder.

[0062] Furthermore, the distance between the coupling antenna 30 and the lighting component and the power supply component is greater than a preset distance threshold. Exemplarily, the distance threshold may be 10 mm. By maintaining a certain distance, it is possible to prevent the large-volume metal components (such as large capacitors, large inductors, etc.) in the power supply module from reflecting electromagnetic waves and affecting the antenna radiation directivity and electromagnetic compatibility; and to prevent the metal mortise and light source board in the lighting module from interfering with the antenna radiation due to the coupling effect, causing the antenna radiation energy loss.

[0063] In one embodiment, the coupling antenna 30 can tune the overall impedance of the antenna by adjusting the coupling coefficient and the length of the coupling branch.

[0064] The antenna input impedance is defined as:

[0065]

[0066] Among them, U in Indicates the input voltage, I in Represents the output current. The coupled antenna input impedance is a complex number and is defined as: Z in =R in +jX in , R n represents the input resistance, X n Indicates input reactance.

[0067] The equivalent model of coupled antenna under ideal conditions can be found in Figure 4 shown.

[0068] The primary impedance is:

[0069] Z 11 =jX1=j2πfL1

[0070] The secondary impedance is:

[0071]

[0072] According to the simplified circuit:

[0073]

[0074] When the coupled antenna resonates:

[0075]

[0076]

[0077] x in =2πfL1

[0078] At this time, the coupled antenna input impedance is:

[0079]

[0080] From the above analysis, the real part of the input impedance of the coupling antenna is affected by the coupling coefficient and the resistance of the IFA antenna, while the imaginary part can be adjusted using the coupling branch to achieve antenna tuning.

[0081] When the antenna is in a resonant state, the input impedance of the coupled antenna is a pure resistor. According to the maximum power transfer theorem, the radiation efficiency of the antenna is the best. The maximum power transfer theorem is:

[0082]

[0083] Taking the design of 2.4GHz smart candle lamp antenna as an example, the antenna performance is simulated through simulation software, and the results are as follows:

[0084] (1) In microwave theory, VSWR (voltage standing wave ratio) is used to measure the effective transmission power of a wireless signal through a power source, transmission line, and finally into a load. For an ideal system, the transmission energy is 100%, which requires precise matching between the source impedance, the characteristic impedance of the transmission line and other connectors, and the load impedance. Since there is no interference in the ideal transmission process, the AC voltage of the signal remains the same at both ends. In actual systems, impedance mismatch will cause part of the power to be reflected toward the signal source (like an echo). Reflection causes destructive interference, resulting in voltage peaks and troughs at different times and distances along the transmission line.

[0085] VSWR definition:

[0086]

[0087] Among them, V reflected Represents the voltage amplitude of the reflected wave, V incident is the voltage amplitude of the incident wave, and Γ represents the voltage reflection coefficient. VSWR is one of the indicators of antenna performance. If the load and the transmission line are perfectly matched, Γ = 0 and VSWR = 1:1. Figure 5 It can be seen that the VSWR of the designed antenna is lower than 2:1 in the 2.4GHz~2.5GHz frequency band, and the bandwidth exceeds 100MHz, which meets the requirements for good antenna performance.

[0088] (2) The impedance represented by SmithChart is the normalized impedance and normalized admittance obtained by normalizing the actual impedance relative to the system characteristic impedance Z0. Its characteristic is that the equal resistance circles are tangent to the point (1, 0), and the center of the circle is located on the horizontal axis of the figure. As the resistance value increases, the radius of the equal resistance circle decreases. The resistance of the leftmost point in the original figure is 0, and the resistance of the rightmost point is +∞. Figure 6 It can be seen that the central frequency of the antenna designed in this paper is 2.45 GHz, which is closer to the center of the circle (1, 0), indicating that the antenna impedance characteristics are good.

[0089] (3) In the field of antennas, another indicator that reflects antenna performance is the antenna radiation efficiency, which is defined as:

[0090]

[0091] Among them, P radiated Represents the total radiated power, P totalavailable Indicates the total input power of the signal source. Antenna radiation efficiency is a value between 0 and 1, and the larger the value, the better the radiation performance of the antenna. It is generally believed that an antenna with a radiation efficiency of 50% is already a very good antenna. Figure 7 ,The radiation efficiency of the antenna exceeds 60% in the 2.4GHz to 2.5GHz frequency band, meeting the better antenna ,performance requirements.

[0092] (4) Antenna gain refers to the ratio of the power density of the signal generated by the actual antenna and the ideal radiator at the same point in space under the condition of equal input power. It quantitatively describes the degree to which an antenna radiates the input power and is used to measure the ability of an antenna to send and receive signals in a specific direction. In a certain direction, the greater the antenna gain, the longer the electromagnetic wave propagates; see Figure 8 As shown, the antenna gain is ≥1.6dBi, which means that the antenna can radiate over a longer distance.

[0093] (5) Antenna pattern refers to the graph of the relative field strength of the radiation field changing with direction at a certain distance from the antenna. It is usually represented by mutually perpendicular plane patterns in the direction of maximum radiation of the antenna. Antenna pattern is an important indicator for measuring antenna performance. The more circular the pattern, the more uniform the antenna radiation and the better the omnidirectional performance. Through simulation, see Fig. 9 ,Since this design is a slot antenna, it presents an “8” shape in the YZ plane and is close to a circle in the XZ plane.

[0094] Through simulation, it can be seen that the slot-coupled antenna design has good antenna radiation performance in the 2.4GHz~2.5GHz frequency band, and is not inferior to the traditional antenna design extending out of the light source board; in addition, the antenna is designed on the lamp head side of the driver board, with a good clearance area, which can improve the antenna radiation performance, and the radio frequency circuit can also reduce the impact of electromagnetic compatibility issues; finally, the antenna is designed on the lamp head side inside the product, which does not affect the lighting performance of the lamp, does not affect the overall appearance of the product, and also provides a new design idea for smart lamp antennas.

[0095] In summary, most of the traditional smart lamp antenna designs are on the light source board side, which is close to the power module and the lighting module. They are easily affected by large metal devices, resulting in poor performance, and will cause antenna shadow problems, affecting the lighting effect. The present invention adopts a new antenna design method, that is, the slot-coupled antenna is designed in the antenna layout area on the lamp head side, and the copper-plated nickel spiral lamp head is slotted to achieve signal interaction with the external space. This design is away from large metal devices, which can not only ensure the mutual conversion between high-frequency electromagnetic signals and high-frequency current signals, but also has good clearance to reduce electromagnetic compatibility problems; in addition, the slot-coupled antenna has strong adjustability, can realize beam adjustment, and effectively improve the overall performance of the antenna.

[0096] The coupling antenna of the present invention has various forms, such as PCB, silver paste printing, laser engraving, FPC, stamping parts and other metal wave conductor antennas, and the specific application form can be designed and optimized according to the actual product. The present invention can improve the overall radiation performance of the antenna, and embed plastic materials or other waterproof non-metallic materials in the gaps without affecting the product safety and waterproof performance, lighting performance and product aesthetics.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smart lamp, characterized in that: include: Lamp holder, lamp body and coupling antenna; The lamp cap and the lamp body are tightly connected, and the coupling antenna is fixed in the lamp body; The lamp holder comprises a spiral region away from the lamp body and a non-spiral region close to the lamp body, the non-spiral region and the lamp body are both provided with through holes, and when the lamp holder and the lamp body are tightly connected, the coupling antenna, the through hole on the lamp body and the through hole on the non-spiral region are located in corresponding positions; The distance between the coupling antenna and the through hole in the non-helical region, and the shape and size of the through hole in the non-helical region and the lamp body are determined by the coupling parameters of the coupling antenna, which are used to achieve beam adjustment and effectively improve the overall performance of the antenna; The coupling antenna is a combination of a metal antenna and a coupling branch, and the overall impedance of the antenna is tuned by adjusting the coupling coefficient and the length of the coupling branch; The coupling antenna is integrated on one end of the smart lamp driving board away from the driving circuit; The smart lamp also includes: a lighting component, a power supply component and a radio frequency module; The lighting component, power component and radio frequency module are all located inside the lamp body, the lighting component and radio frequency module are both connected to the power component, and the radio frequency module is connected to the coupling antenna; the distance between the coupling antenna and the lighting component and the power component is greater than a preset distance threshold.

2. The smart lamp according to claim 1, characterized in that: The through holes on the non-spiral area are sealed and filled with a non-metallic material having waterproof properties.

3. The smart lamp according to claim 1, characterized in that: A drive board slot is provided in the lamp body; The smart lamp driving board is fixed in the lamp body through the driving board slot.

4. The smart lamp according to claim 1, characterized in that: The coupling antenna is integrated on an independent signal transceiver board, and a signal transceiver board slot is provided in the lamp body; The signal transceiver board is fixed in the lamp body through the signal transceiver board slot.

5. The smart lamp according to claim 1, characterized in that: The distance between the coupling antenna and the through hole on the non-helical region is 2 mm-4 mm.

6. The smart lamp according to claim 1, characterized in that: The distance threshold is 10 mm.

7. The smart lamp according to claim 1, characterized in that: Also includes: Heat dissipation components; The heat dissipation component is located in the lamp body, and the heat dissipation component is any one of the following: an air-cooled radiator, a water-cooled radiator, a heat pipe radiator, and a semiconductor refrigerator.

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