A smart lamp with integrated wireless communication function

Abstract

The utility model discloses an intelligent lamp with integrated wireless communication function belongs to intelligent lighting technical field. In view of the optical shadow and communication performance deterioration problem of the existing metal material lamp caused by the antenna overhanging hole, innovative solution is proposed: the wireless communication module is completely built -in in the lamp cup, and the physical opening is replaced by the feed point coupling mechanism of multilayer lamp board. Specifically through the physical connection of the second feed point of the circuit layer and the wireless module first feed point, the capacitive coupling with the aluminum substrate layer is realized by using the insulating layer, and meanwhile the slot antenna is formed by the slot and the adjustable contact point, so that the radio frequency signal is efficiently radiated in the closed metal environment. The design completely eliminates the need of lamp board opening, avoids the light scattering shadow, and optimizes the antenna performance through the cooperative tuning of the slot size and the contact point spacing, realizes the unity of the lighting effect and the communication reliability.

Description

Technical Field

[0001] This invention relates to the field of intelligent lighting technology, and in particular to an intelligent lighting fixture with integrated wireless communication function. Background Technology

[0002] In the field of smart lighting technology, current mainstream solutions generally adopt an integrated radio frequency (RF) antenna design. Specifically, this involves integrating the RF module and antenna onto a separate small PCB board to form a wireless module, which is then plugged into the driver board, and signal transmission is achieved through openings in the light source board. While this design can achieve basic communication functions, it has significant limitations—because both the lamp board and the lamp reflector are made of metal, a large opening must be made in the lamp board to allow the antenna to protrude, resulting in uneven light distribution and a shadow effect. Simultaneously, the RF antenna's performance degrades due to exposure to a complex electromagnetic environment.

[0003] Chinese patent CN212869413U attempts to optimize antenna performance through an indirect grounding structure, but its solution fails to address a fundamental flaw: the technology relies on complex metal grounding components and multi-pad structures, increasing manufacturing costs and assembly difficulty, and failing to resolve the shadowing problem caused by openings in the lamp panel. More critically, existing smart lighting fixtures generally face a contradiction between the metal shielding effect and the compromise of structural integrity—metal lamp cups / panels inevitably hinder electromagnetic wave transmission, while slotting leads to light scattering and reduced mechanical strength. This inherent design conflict severely restricts the industrial design freedom and communication reliability of smart lighting fixtures, urgently requiring a breakthrough solution. Utility Model Content

[0004] This invention aims to solve the problems of light shadow effects and antenna performance degradation caused by openings in metal lamp panels. Addressing the design flaw of existing smart lamps that require large openings in the lamp panel due to the shielding properties of metal, resulting in antenna protrusion, this invention completely eliminates the need for openings through an innovative structural design. This avoids light scattering and shadow formation while ensuring efficient transmission of electromagnetic waves in a closed metal environment, achieving synergistic optimization of lighting effects and communication performance.

[0005] This invention aims to overcome the reliability bottlenecks and structural complexity of traditional grounding solutions. Addressing the precision assembly requirements (such as multi-pad mounting and gap control) needed for indirect connection between metal heat sinks and reference ground in existing technologies, it constructs an integrated signal transmission and grounding mechanism. This eliminates capacitor discharge flicker while simplifying the number of components and assembly levels, fundamentally improving the industrial stability and production compatibility of intelligent lighting fixtures.

[0006] This invention aims to achieve a balance between electromagnetic compatibility and optical integrity in metal structure lighting fixtures. By reconstructing the radio frequency signal transmission path and antenna radiation principle, it overcomes the natural shielding effect of metal lamp cups / panels on electromagnetic waves, enabling the antenna to complete efficient signal transmission and reception without physical exposure. Ultimately, it achieves a multi-dimensional balance between mechanical strength, heat dissipation performance, optical distribution, and wireless communication in lighting fixture industrial design.

[0007] This invention proposes an intelligent lamp with integrated wireless communication function, the lamp comprising: The multi-layer lamp panel consists of a circuit layer, an insulating layer, and an aluminum substrate layer, and is embedded in the lamp cup and connected to the lamp cup through contact points. The lamp cup contains a power module and a wireless communication module. The wireless communication module has a first feed point, and the circuit layer has a second feed point. The first feed point and the second feed point are physically connected. The multi-layer lamp board structure has a slot that runs through the three layers.

[0008] Preferably, the first feed point and the second feed point are connected by a plug-in. When a high-frequency signal reaches the second feed point through the first feed point, a mirror current is induced on the surface of the aluminum substrate layer, generating electric field coupling.

[0009] Preferably, the second feed point and the aluminum substrate layer form a capacitive coupling structure through an insulating layer.

[0010] Preferably, the area of ​​the second feed point can be adjusted.

[0011] Preferably, the contact point includes a first contact point adjacent to the slot and a second contact point with an adjustable position, and there are no other contact points between the first contact point and the second contact point; The slot, together with the first contact point and the second contact point, forms a slot antenna structure.

[0012] Preferably, the gap width formed by the first contact point and the second contact point can be configured in the range of 1 mm to 3 mm.

[0013] Preferably, the length of the slot can be adjusted according to the distance between the first contact point and the second contact point.

[0014] Preferably, the power module includes an AC-DC conversion circuit, with its input terminal connected to an AC power source and its output terminal connected to a DC-DC conversion circuit. This DC-DC converter circuit converts the first DC voltage into a low-voltage DC of 1.8V, 3.3V, or 5V to power the wireless communication module.

[0015] Preferably, the power module integrates an intelligent control chip that can analyze wireless commands in real time and generate PWM dimming signals.

[0016] Preferably, the wireless communication module integrates a WiFi / Bluetooth dual-mode RF transceiver, a cellular communication baseband chip, a power amplifier, and a low-noise amplifier circuit, and radiates electromagnetic waves through the slot antenna formed by the slot and contact point.

[0017] This utility model has the following beneficial effects: 1. By fully integrating the RF module inside the lamp cup and replacing the traditional external antenna structure with a feed point on the lamp board, the need for lamp board openings is completely eliminated. This approach avoids light scattering and shadows while preserving the integrity of the lamp board's metal structure, achieving a unified design and optical performance for the lamp.

[0018] 2. An integrated slotted antenna is constructed using slots and contact points in the lamp panel, transmitting radio frequency signals to the metal substrate layer for radiation via capacitive coupling. This design enables the antenna to achieve efficient signal transmission and reception in a closed metal environment, achieving stable communication performance without damaging the lamp panel structure.

[0019] 3. Based on the capacitive coupling barrier formed between the feed point and the metal substrate, interference from abnormal current in the drive circuit to the light source board is effectively blocked. At the same time, the complex multi-level grounding component structure is eliminated, and the assembly process is significantly simplified through an integrated conduction path.

[0020] 4. The metal substrate layer serves as both a heat sink and an antenna radiator. The slotted design ensures electromagnetic radiation efficiency while improving heat convection, fundamentally resolving the contradiction between heat dissipation requirements and communication performance in traditional solutions. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the lamp panel structure of this utility model.

[0022] Figure 2 This is a schematic diagram of the lamp cup structure of this utility model.

[0023] Figure 3 This is a schematic diagram of the layered structure of the lamp panel of this utility model.

[0024] Figure 4 This is the circuit diagram of this utility model.

[0025] In the diagram: 1-Multi-layer lamp board, 11-Circuit layer, 111-Second feed point, 12-Insulation layer, 13-Aluminum substrate layer, 14-Slot, 2-Lamp cup, 3-Power module, 4-Wireless communication module, 41-First feed point, 5-Contact point, 51-First contact point, 52-Second contact point. Detailed Implementation

[0026] Example 1 This utility model provides an intelligent lamp with integrated wireless communication function. Its core innovation lies in completely embedding the radio frequency module into the lamp body structure, achieving hole-free antenna integration through the collaborative design of multi-layer lamp panels and lamp cups. Figure 1 As shown, the lamp fixture is an organic whole composed of a multi-layer lamp panel 1, a lamp cup 2, a power module 3, and a wireless communication module 4. The multi-layer lamp panel 1 adopts a precision laminated structure, which is composed of a circuit layer 11, an insulating layer 12, and an aluminum substrate layer 13 through a hot-pressing process. The whole is embedded in a specially designed annular groove of the lamp cup 2 to form a seamless mechanical support system. The lamp panel and the lamp cup achieve a dual connection function through specially designed contact points 5 - providing reliable physical fixation support and establishing a precise electrical conduction path. The first contact point 51 is rigidly fixed at the edge of the slot 14, and the second contact point 52 achieves controllable displacement in the circumference of the lamp cup through a precision slide rail. The two contact points are strictly isolated from other conductive nodes to ensure that the current path forms an optimized radiation loop.

[0027] according to Figure 2 and Figure 3 As shown, the three-layer structure of the lamp board 1 has distinct functions: the circuit layer 11 uses a copper-clad substrate for circuit routing, with a second feed point 111 on its surface; the insulating layer 12 is made of a high-dielectric-constant composite material, forming a stable dielectric barrier between the circuit layer 11 and the aluminum substrate layer 13; the aluminum substrate layer 13 serves both heat dissipation and radiation functions, and its surface anodized treatment improves heat conduction efficiency. The slot 14, formed by precision cutting, penetrates the three layers to create a vertical channel, its length strictly parallel to the lamp cup axis, and its width determined through simulation optimization. The position of the second feed point 111 is determined through electromagnetic field simulation, maintaining a specific electromagnetic coupling distance from the edge of the slot to ensure signal transmission efficiency.

[0028] The lamp cup 2 is integrally die-cast, housing the power module 3 and the line communication module 4. A high-precision annular groove is machined at the bottom of the lamp cup, within which is embedded an array of contact points made of elastic conductive material, forming an interference fit with the edge of the multi-layer lamp board 1. The dual-cavity layout effectively isolates high-voltage and low-voltage circuits, preventing power interference from affecting communication quality, while the metal cup body evenly dissipates the module's operating heat. The lamp cup wall thickness has been thermodynamically optimized to maximize heat dissipation area while ensuring structural strength.

[0029] The contact point system employs a differentiated design: the first contact point 51 is a copper alloy columnar structure, permanently fixed at the starting end of the slot 14 and directly fused to the aluminum substrate layer 13; the second contact point 52 is an adjustable spring-loaded pin structure, achieving precise displacement within a ±30° range around the lamp cup via a rotation adjustment mechanism. An insulating isolation strip is provided between the two contact points, strictly prohibiting the placement of any auxiliary contacts to ensure a single closed-loop path for the high-frequency current. This unique layout allows the slot and contact points to together form a dynamically tunable slot antenna base frame, optimizing electrical performance through mechanical adjustment.

[0030] according to Figure 4 As shown, power module 3 comprises a three-stage processing unit: the front-end AC-DC conversion circuit employs bridge rectification and PFC correction technology to convert AC power into stable high-voltage DC power; the mid-stage DC-DC step-down circuit uses pulse width modulation technology to output a precise low voltage adapted to the wireless communication chip; and the final power drive circuit integrates an intelligent control chip to analyze wireless commands in real time and generate PWM dimming signals. The module incorporates multi-stage filtering circuits and overvoltage protection units to ensure stable operation under fluctuating power grid conditions. The layout of each circuit unit is optimized through thermal simulation, with high-temperature components placed close to the inner wall of the lamp cup to enhance heat dissipation.

[0031] The wireless communication module 4 adopts a highly integrated design: the substrate integrates an RF transceiver chipset, crystal oscillator, impedance matching network, and filtering circuit, supporting 2.4GHz / 5GHz dual-band WiFi, Bluetooth 5.0, and 4G LTE multi-mode communication. The transmitting channel is equipped with a two-stage power amplifier to enhance signal strength, while the receiving channel uses a differential low-noise amplifier to optimize sensitivity. The first feed point 41 on the module surface is a copper pillar structure, and impedance matching design ensures signal transmission integrity. The entire module is encapsulated in an electromagnetically shielded cavity and connects to the outside only through the feed point, effectively suppressing electromagnetic interference.

[0032] The feed point connection system employs an innovative design: the first feed point 41 and the second feed point 111 are physically connected via an elastic probe, forming a low-loss RF transmission channel. Between the circuit layer 11 and the aluminum substrate layer 13, the dielectric properties of the insulating layer 12 make it a natural capacitor. When a high-frequency signal reaches the second feed point 111, a mirror current is induced on the surface of the aluminum substrate layer 13, achieving energy transfer through electric field coupling. This non-contact signal conversion mechanism avoids interference from direct electrical connections and solves the signal transmission challenges in metallic environments.

[0033] The radiation principle of the slot antenna is based on electromagnetic field reconstruction: a slot 14 penetrates the aluminum substrate layer 13 to form a physical slot. When a high-frequency current is applied to the first contact point 51, an alternating electric field is formed on both sides of the slot. The second contact point 52, as an adjustable terminal reflection point, works in conjunction with the slot length to determine the standing wave distribution. The current on the aluminum substrate surface forms a closed-loop oscillation along the slot-contact point path, converting electrical energy into spatial electromagnetic waves. By adjusting the position of the contact point, the effective length of the current path can be changed, achieving precise control of the antenna resonant frequency.

[0034] There is a strict correlation between the slot length and the electromagnetic wavelength: increasing the physical length of the slot is equivalent to extending the effective radiating element of the antenna, causing the resonant frequency to shift towards lower frequencies; conversely, shortening the length increases the operating frequency. Changing the contact point spacing can effectively alter the antenna port impedance; as the spacing increases, the current loop expands, simultaneously lowering the resonant frequency. By coordinating the adjustment of the slot length and the contact point spacing, the antenna can cover broadband communication needs from 2.4 GHz to 5.8 GHz.

[0035] The dimensions of the second feed point 111 directly affect the system impedance matching: increasing the feed point contact area enhances the capacitive coupling strength with the aluminum substrate, improves energy transfer efficiency, and significantly optimizes the antenna resonance depth; reducing the area lowers the coupling coefficient, making it suitable for high impedance matching scenarios. This feature allows engineers to optimize antenna performance without changing the physical structure by simply adjusting the copper foil pattern.

[0036] The slot width is a key parameter for bandwidth control: appropriately increasing the slot width can expand the electromagnetic field radiation cross-section and improve the antenna bandwidth capacity, but exceeding a critical value will lead to a decrease in gain. Within a specific range, the width can achieve an optimal balance between bandwidth and gain. In actual manufacturing, micron-level width control is achieved by controlling the precision of CNC cutting. Polishing the slot walls reduces RF loss, and chamfering the edges avoids electric field distortion.

[0037] This technical solution overcomes industry bottlenecks through three major innovations: First, the feed point coupling mechanism replaces the physical antenna extension, completely eliminating optical shadows caused by lamp panel openings and ensuring uniform light source distribution; second, the integrated design of the slot antenna and metal structure achieves efficient electromagnetic radiation in a closed environment, significantly improving communication performance compared to traditional solutions; third, the dual-functional innovation of the aluminum substrate layer 13 enables synergistic optimization of heat dissipation and communication at the physical level. The entire system maintains the integrity of the metal luminaire while solving derivative problems such as flicker suppression and thermal management optimization, providing a disruptive technical architecture for smart lighting.

[0038] Example 2 This utility model adopts a modular architecture design, with core components including a power supply module 3, a wireless communication module 4, and a multi-layer lamp board system 1. The power supply module 3 integrates an AC-DC conversion unit, converting AC input to high-voltage DC through bridge rectification and power factor correction technology. Its output is connected to a two-stage DC-DC step-down circuit. The front-stage step-down provides the medium-voltage DC required for LED driving, while the rear-stage precision voltage regulator outputs low-voltage DC (typically adjustable 3.3V / 5V) adapted to the wireless communication module 4. The module internally embeds an overcurrent protection chip and an electromagnetic compatibility filter to ensure power quality meets the stringent requirements of the RF circuit. The intelligent drive unit analyzes the PWM commands transmitted by the wireless communication module 4 and dynamically adjusts the pulse duty cycle to achieve stepless control of LED color temperature and brightness, while also integrating a temperature feedback loop to prevent overheating of the lamp.

[0039] The wireless communication module 4 employs a high-density circuit design. A multi-protocol communication chipset (supporting dual-band WiFi / Bluetooth 5.2 and 4G CAT1 communication) is integrated into the ceramic substrate. The RF front-end includes a two-stage power amplifier and a differential low-noise receiving channel, surrounded by a π-type impedance matching network and a bandpass filter. A columnar first feed point 41 is located at the module edge, using a gold-plated copper core-elastic silicone composite structure to ensure contact reliability. The RF signal is directly connected to the feed point via a microstrip line, and the transmission path length is phase-optimized to avoid signal reflection. The entire module is encapsulated within a copper-plated alloy shielded cavity, with only the feed point interface connecting to the outside. Actual electromagnetic leakage attenuation reaches over 40dB.

[0040] The collaborative working mechanism between the wireless communication module 4 and the multilayer lamp board 1. After the radio frequency chip of the wireless communication module 4 generates a communication signal, the signal is optimized for transmission characteristics by an internal impedance matching network and directly reaches the first feed point 41 through a microstrip line. This feed point adopts a gold-plated copper core-beryllium copper alloy spring composite structure to ensure stable electrical contact even in the event of mechanical vibration when connected to the second feed point 111 of the lamp board. After the signal is transmitted to the second feed point 111 of the circuit layer 11, a displacement current is formed in the dielectric of the insulating layer 12. This current induces a mirror charge distribution on the surface of the aluminum substrate layer 13, realizing the lossless transfer of electric field energy.

[0041] The multi-layer lamp board 1 is manufactured using a hot-press composite process: the circuit layer 11 is a copper-clad substrate with a precision antenna feed network etched on it, and a circular second feed point 111 is set in the central area. The area of ​​the copper foil is optimized by electromagnetic simulation. The insulating layer 12 is made of polytetrafluoroethylene composite material with a dielectric constant that is stable within a specific range. The thickness is controlled to achieve the best capacitive coupling effect. The aluminum substrate layer 13 is formed into a ceramic surface by micro-arc oxidation. The slotted area 14 is made by laser cutting, and the slot walls are polished to reduce radio frequency loss.

[0042] The lamp board and lamp cup 2 are connected via an innovative contact system: the first contact point 51 is a copper-tungsten alloy column, permanently fused to the starting end of the slot 14; the second contact point 52 is an adjustable structure, using a precision threaded guide rod to achieve displacement positioning within a ±30° circumferential range of the lamp cup 2. A polyimide insulating strip is placed between the two contact points 5 to ensure no parasitic conductive paths. When the first feed point 41 of the wireless communication module 4 is connected to the second feed point 111 of the lamp board via a spring probe, a high-frequency signal excites an alternating electric field on the copper foil of the circuit layer 11, which is then coupled to the surface of the aluminum substrate through the insulating layer 12. This process forms an equivalent planar capacitor energy transfer model.

[0043] The slot 14 on the aluminum substrate and the contact point 5 constitute the core of the radiation system: the slot 14 penetrates three layers of material to form an electromagnetic wave radiation window, the first contact point 51 serves as a current injection end to establish a strong electric field region at the edge of the slot 14, and the adjustable second contact point 52 acts as a terminal reflector to adjust the standing wave distribution. The current on the aluminum substrate surface forms a closed-loop oscillation along the path of the slot 14, and the effective length of the current loop can be changed by adjusting the position of the second contact point 52. When the length of the slot 14 increases, the half-wavelength of the electromagnetic wave expands, and the resonant frequency shifts to a lower frequency band; when the length is shortened, the high-frequency response capability is improved. This characteristic allows the antenna to cover the 2.4-5.8GHz communication frequency band.

[0044] The copper foil area of ​​the second feed point 111 directly affects the system impedance matching: increasing the area enhances capacitive coupling strength and improves the current excitation efficiency of the aluminum substrate; decreasing the area reduces the coupling coefficient to achieve high impedance matching. The width of the slot 14 is precisely controlled by CNC cutting. Appropriately increasing the width can expand the bandwidth capacity, but the risk of gain reduction must be balanced. The lamp cup 2 is made of die-cast aluminum alloy with a heat dissipation fin array on the inner wall. The power module 3 is close to the heat conduction area at the top of the lamp cup 2, and the wireless communication module 4 is placed in the bottom electromagnetic isolation chamber. The dual-module independent heat dissipation design avoids thermal coupling interference.

[0045] This solution achieves three technological breakthroughs: the capacitive coupling mechanism allows RF signals to penetrate the metal shielding layer, resulting in a higher measured signal strength compared to traditional external antennas; the slotted 14-contact-5 system enables a passive tunable antenna, avoiding complex matching circuits; and the aluminum substrate simultaneously functions as a heat sink and radiator, with the slotted 14 structure promoting improved heat convection efficiency. The entire system achieves a balance between communication performance and optical quality within a closed metal environment, completely eliminating the light spot and shadow problems caused by openings in the lamp panel.

Claims

1. A smart lamp with integrated wireless communication function, characterized in that, The lighting fixture includes: The multi-layer lamp board (1) is composed of a circuit layer (11), an insulating layer (12) and an aluminum substrate layer (13), and is embedded in the lamp cup (2) and connected to the lamp cup (2) through the contact point (5); The lamp cup (2) is equipped with a power module (3) and a wireless communication module (4) inside; The wireless communication module (4) is provided with a first feed point (41), and the circuit layer (11) is provided with a second feed point (111). The first feed point (41) and the second feed point (111) are physically connected. The multi-layer lamp panel structure is provided with a slot (14) that runs through the three layers.

2. The intelligent lighting fixture with integrated wireless communication function according to claim 1, characterized in that, The first feed point (41) and the second feed point (111) are connected by a plug-in. When a high-frequency signal reaches the second feed point (111) through the first feed point (41), a mirror current is induced on the surface of the aluminum substrate layer (13), generating electric field coupling.

3. A smart lamp with integrated wireless communication function according to claim 1 or 2, characterized in that, The second feed point (111) and the aluminum substrate layer (13) form a capacitive coupling structure through an insulating layer (12).

4. A smart lamp with integrated wireless communication function according to claim 1 or 2, characterized in that, The area of ​​the second feed point (111) can be adjusted.

5. A smart lamp with integrated wireless communication function according to claim 1, characterized in that, The contact point (5) includes a first contact point (51) adjacent to the slot (14) and a second contact point (52) with adjustable position, and there are no other contact points between the first contact point (51) and the second contact point (52); The slot (14) forms a slot antenna structure with the first contact point (51) and the second contact point (52).

6. A smart lamp with integrated wireless communication function according to claim 5, characterized in that, The gap width formed by the first contact point (51) and the second contact point (52) can be configured in the range of 1 mm to 3 mm.

7. A smart lamp with integrated wireless communication function according to claim 1 or 5, characterized in that, The length of the slot (14) can be adjusted according to the distance between the first contact point (51) and the second contact point (52).

8. A smart lamp with integrated wireless communication function according to claim 1, characterized in that, The power module (3) includes an AC-DC conversion circuit, whose input terminal is connected to an AC power source and whose output terminal is connected to a DC-DC conversion circuit. The DC-DC conversion circuit converts the first DC voltage into a low-voltage DC of 1.8V, 3.3V, or 5V to power the wireless communication module.

9. A smart lamp with integrated wireless communication function according to claim 1 or 8, characterized in that, The power module (3) integrates an intelligent control chip, which analyzes wireless commands in real time and generates PWM dimming signals.

10. A smart lamp with integrated wireless communication function according to claim 1 or 8, characterized in that, The wireless communication module (4) integrates a WiFi / Bluetooth dual-mode radio frequency transceiver, a cellular communication baseband chip, a power amplifier and a low-noise amplifier circuit, and radiates electromagnetic waves through the slot antenna formed by the slot (14) and the contact point (5).

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