Intelligent shell of PCB (Printed Circuit Board) and NFC (Near Field Communication) triggered LED

Abstract

The utility model relates to the technical field of electronic decoration and intelligent interaction, in particular to an intelligent shell of a PCB (Printed Circuit Board) and an NFC (Near Field Communication) triggered LED (Light Emitting Diode), which comprises a PCB circuit cover, a conductive wire is arranged in the PCB circuit cover, and an NFC coil is drawn on the surface layer or the inner layer of the PCB circuit cover; the NFC control chip is connected with the NFC coil, collects electric energy through an electromagnetic field of the NFC coil and controls the NFC coil to output direct current; and the LED module is connected with the NFC coil and triggers LED light by receiving the direct current output by the NFC coil so as to realize a dynamic lighting effect. According to the utility model, a PCB circuit board, NFC energy acquisition and LED lighting effect are integrated, and an intelligent housing cover is manufactured through a multilayer flexible substrate technology. Based on the electromagnetic induction principle, when the device is close to the NFC reader-writer, the energy module converts a radio frequency signal into electric energy to drive the LED array. The method can be applied to notebook computers, tablet personal computers, mobile phone shells and other devices, dynamic light lines are displayed through the programmable LED, and the sense of science and technology is enhanced.

Description

A smart housing for a PCB circuit board and an NFC-triggered LED Technical Field

[0001] This utility model relates to the field of electronic decoration and intelligent interaction technology, specifically to a smart housing for a PCB circuit board and an NFC-triggered LED. Background Technology

[0002] Currently, traditional covers or protective cases mainly use leather (including PU synthetic leather and genuine leather), plastic (such as polycarbonate and acrylic), or metal materials (aluminum alloy and stainless steel), and are decorated through screen printing patterns, UV transfer textures, laser engraving, or embossing processes. These products provide basic drop and scratch protection in terms of physical protection, and can achieve visual effects such as wood grain, marble patterns, and gradient colors in terms of aesthetics. However, their functionality is always limited to passive protection and static aesthetic presentation. They cannot sense changes in the environment, nor can they digitally interact with the user.

[0003] Some cutting-edge products attempt to embed flexible LED light strips in the cover, but these solutions mostly rely on button battery packs or micro USB power modules, and control preset lighting effects such as monochrome breathing lights and rainbow marquees through physical sliding switches or press buttons. This design not only increases the product thickness by 2-3mm (taking the Samsung Galaxy S21 Ultra smart case as an example), affecting the comfort of holding the device, but its power supply system also suffers from battery anxiety (approximately 4 hours of continuous illumination) and charging inconvenience.

[0004] At the interaction logic level, existing solutions mostly employ mechanical triggering mechanisms, making it difficult to achieve intelligent linkage with mobile phone gyroscope data, APP notifications, or ambient light sensors. It's worth noting that while NFC near-field communication technology is maturely applied in areas such as mobile payments (e.g., Apple Pay) and quick device pairing (e.g., connecting Sony WH-1000XM5 headphones), current applications for intelligent interaction integration in decorative casings are still limited to one-way information transmission (e.g., reading a preset URL by touching the cover), lacking intuitive visual feedback systems such as dynamic lighting effects, variable color temperature, or graphical interfaces. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model discloses a smart housing for a PCB circuit board and an NFC-triggered LED. When the NFC of a mobile phone is activated and it is near the PCB coil, the NFC chip collects energy to drive the LED beads to achieve dynamic lighting effects. It supports extended interactive functions and is suitable for the housings of devices such as laptops and tablets.

[0006] This utility model is achieved through the following technical solution:

[0007] This utility model provides a smart housing for a PCB circuit board and an NFC-triggered LED, including...

[0008] The PCB circuit cover has conductive traces inside and NFC coils are drawn on the surface or inner layer.

[0009] An NFC control chip is connected to the NFC coil, which collects electrical energy through the electromagnetic field of the NFC coil and controls the NFC coil to output direct current.

[0010] The LED module is connected to the NFC coil and triggers the LED light by receiving the DC power output from the NFC coil to achieve dynamic lighting effects.

[0011] Furthermore, it also includes an intelligent interaction module, which is equipped with an intelligent social extension and an intelligent notification system.

[0012] Furthermore, the intelligent interaction module reads digital notes and schedule reminders via NFC electronic bookmarks.

[0013] Furthermore, the PCB circuit cover uses a PCB board as the substrate, with built-in conductive traces, and decorative patterns are formed on the surface through solder pad traces and silkscreen printing.

[0014] Furthermore, the NFC control chip includes an EEPROM storage module for storing bookmarks, schedule reminders, social media links, or other configuration information.

[0015] Furthermore, the NFC control chip is equipped with a PWM output terminal for controlling the brightness or blinking of the LED module.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention deeply integrates a PCB circuit board, NFC energy harvesting, and LED lighting effects, achieving a novel smart casing cover through multi-layer flexible substrate integration technology. The structure utilizes the principle of electromagnetic induction; when a device approaches an NFC reader, the energy harvesting module converts radio frequency signals into driving electrical energy, activating a preset LED array. This smart cover can be widely used in laptop A-sides, tablet back panels, mobile phone cases, e-reader covers, and other devices, showcasing dynamic light patterns through a programmable LED array, significantly enhancing the product's technological feel and interactive experience. Compared to existing light-emitting casings that require built-in batteries or external power supplies, this invention uniquely employs NFC backscatter power supply technology and supports switching light effect modes and updating interactive content via the NFC protocol, demonstrating broad market application prospects in consumer electronics, smart packaging, and IoT devices. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the front structure of the smart shell cover based on PCB circuit board and NFC trigger LED of this utility model;

[0020] Figure 2 is a circuit diagram of the smart shell cover based on the PCB circuit board and NFC trigger LED of this utility model. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] In one embodiment, as shown in Figures 1 and 2, this patent discloses a smart housing cover for triggering light-emitting diodes (LEDs) based on printed circuit board (PCB) and near-field communication (NFC) technology. The structure of this housing cover is shown in detail in Figure 1. It includes a housing shell composed of an NFC coil 1, an NFC control chip 2, an LED assembly 3, and custom pad traces and silkscreened decorative patterns 4. The NFC coil 1 is embedded in the PCB and connected to the NFC control chip 2. The LED assembly 3 is connected to the VOUT port of the NFC control unit and can be controlled to turn on and off according to the strength of the NFC field. This smart housing cover design allows for adjustment of LED brightness and NFC-related smart interaction functions via an NFC reader (e.g., a smartphone).

[0023] In this embodiment, the circuit design employs a multilayer printed circuit board (PCB), and near-field communication (NFC) coils are integrated into the cover portion. These NFC coils are connected to the NFC control chip for data transmission and reception. Furthermore, the LED beads are directly connected to the VOUT port, so that the LED beads can be lit when triggered by NFC technology. To ensure stable LED brightness, ceramic capacitors are specifically used for power supply filtering in the circuit design.

[0024] Regarding software interaction functions, this embodiment combines NFC technology with a mobile application and works in conjunction with the chip's built-in EEPROM memory to achieve NFC electronic bookmark functionality. Users can pre-store QR codes or hyperlinks in the chip's EEPROM and then quickly access this information through interaction with the mobile application via NFC technology. Furthermore, combined with social functions, users can quickly share their personal information or trigger relevant notifications and reminders through simple NFC touch gestures, thereby achieving more convenient and efficient social interaction.

[0025] In another embodiment, the PCB circuit cover uses a 0.4mm thick FR-4 flexible substrate, and its surface is formed into a three-dimensional antenna structure using LDS laser direct forming technology, allowing the wire width accuracy of the NFC coil to be controlled within ±0.02mm. Specifically, the coil adopts an octagonal spiral layout, achieving an inductance of 5.8μH at a frequency of 13.56MHz, with a Q value exceeding 32. After optimization using the electromagnetic simulation software HFSS, this design achieves a 17.3% improvement in energy transfer efficiency compared to traditional rectangular coils, and can stably output a drive current of 3.3V / 15mA within a 10mm coupling distance.

[0026] For the LED module layout, flip-chip packaging technology is used to directly bond 0402-sized RGB LEDs onto the PCB surface, with the spacing between adjacent LEDs precisely controlled at 1.27mm, resulting in a pixel density of 200 dots per inch. The LED array is arranged in a honeycomb topology and achieves independent addressing through the WS2812B protocol decoder built into the NFC control chip, supporting 16.7 million colors and a refresh rate of 60 frames per second. In actual testing, when the Samsung Galaxy S23 Ultra has NFC enabled and is 5mm away from the casing, the LED module can complete the response from standby to full brightness within 82ms.

[0027] In the implementation scheme of the intelligent interaction module, the EEPROM memory adopts the AT24C512 model, and the partitioned storage data structure includes: 0x0000-0x0FFF is the bookmark area, storing web page metadata in JSON format; 0x1000-0x1FFF is the schedule reminder area, using the iCalendar standard protocol; 0x2000-0x2FFF configures dynamic light effect parameters and stores PWM duty cycle curve data. When the user touches the casing with the Huawei Mate60 Pro, the device will read the NDEF message in the memory via the NFCForumType4 tag protocol and automatically call the corresponding application to parse the content.

[0028] In terms of surface treatment, the PCB circuit cover adopts fifth-order HDI arbitrary layer interconnect technology, forming a 1.5μm thick electroless nickel-gold layer on the 0.1mm linewidth / spacing pad traces through an immersion gold process. Decorative patterns are exposed using LDI laser direct imaging technology, combined with nano-level UV matte ink to achieve a 72% light diffuse reflectance, ensuring both the visual transmittance of LED light effects and avoiding the glare problem caused by specular reflection. Tested with a Tiber tribometer, the surface coating retains over 90% pattern integrity after 10,000 cycles of rubbing under 500g pressure.

[0029] In summary, this invention deeply integrates PCB circuit boards, NFC energy harvesting, and LED lighting effects, achieving a novel smart casing cover through multi-layer flexible substrate integration technology. This structure utilizes the principle of electromagnetic induction; when a device approaches an NFC reader, the energy harvesting module converts radio frequency signals into driving electrical energy, activating a preset LED array. This smart cover can be widely used in laptop A-sides, tablet back panels, mobile phone cases, e-reader covers, and other devices, showcasing dynamic light patterns through a programmable LED array, significantly enhancing the product's technological appeal and interactive experience. Compared to existing light-emitting casings that require built-in batteries or external power supplies, this invention uniquely employs NFC backscatter power supply technology and supports switching light effect modes and updating interactive content via the NFC protocol, demonstrating broad market application prospects in consumer electronics, smart packaging, and IoT devices.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A smart housing for a PCB circuit board and an NFC-triggered LED, characterized in that, The system includes a PCB circuit cover with conductive traces inside and an NFC coil drawn on its surface or inner layer; an NFC control chip connected to the NFC coil, which collects electrical energy through the electromagnetic field of the NFC coil and controls the NFC coil to output DC power; and an LED module connected to the NFC coil, which triggers LED lights by receiving the DC power output from the NFC coil to achieve dynamic lighting effects.

2. The smart housing of the PCB circuit board and NFC-triggered LED according to claim 1, characterized in that, It also includes an intelligent interaction module, which is equipped with an intelligent social extension and an intelligent notification system.

3. The smart housing of the PCB circuit board and NFC-triggered LED according to claim 2, characterized in that, The intelligent interaction module reads digital notes and schedule reminders via NFC electronic bookmarks.

4. The smart housing of the PCB circuit board and NFC-triggered LED according to claim 1, characterized in that, The PCB circuit cover uses a PCB board as the substrate, with built-in conductive traces, and the surface is decorated with patterns formed by solder pads and silkscreen printing.

5. The smart housing of the PCB circuit board and NFC-triggered LED according to claim 1, characterized in that, The NFC control chip includes an EEPROM storage module for storing bookmarks, schedule reminders, social media links, or other configuration information.

6. The smart housing of the PCB circuit board and the NFC-triggered LED according to claim 1, characterized in that, The NFC control chip has a PWM output terminal, which is used to control the brightness or blinking of the LED module.

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