Flexible wearable LED lamp circuit based on flexible circuit and switching platform

Abstract

The invention belongs to the field of flexible circuits, and discloses a flexible wearable LED lamp circuit based on a flexible circuit and a switching platform thereof, the flexible LED lamp circuit mainly comprises two parts: an LED lamp flexible circuit and a detachable switching platform; the LED flexible circuit and the detachable switching platform are directly connected through a Dupont line. The LED flexible circuit is composed of a power supply input part, an LED small lamp and a divider resistor, and is printed by liquid metal based on a flexible circuit base material. The detachable and replaceable switching platform is composed of a base and a cover plate. Based on the realization of the flexible base material, the flexible base material has the characteristics of bending resistance, easiness in conformality, light weight and thin thickness, and is convenient for making clothes. The LED flexible circuit is made of liquid metal in a printing mode, is high in bending resistance, and has good conformality and certain self-adaptability.

Description

Technical Field

[0001] The present invention belongs to but is not limited to the field of flexible circuit technology, and in particular relates to a flexible wearable LED lamp circuit based on a flexible circuit and a switching platform thereof. Background Art

[0002] The development of flexible circuit technology stems from a shift away from the limitations of traditional rigid circuits and driven by emerging application demands. Early PCBs, constrained by rigid substrates, struggled to meet the trend toward miniaturization and lightweighting. Starting in the mid-20th century, the aerospace and consumer electronics sectors pioneered the integration of flexible substrates such as polyimide (PI) and polyester (PET) with rolled copper foil, achieving high-density wiring through roll-to-roll manufacturing. This development gradually led to the development of composite structures such as rigid-flexible boards. Advances in materials science, such as liquid crystal polymers (LCP), graphene conductive layers, and inkjet printing technologies, have further enhanced circuits' high-temperature resistance, stretchability, and customization, driving their application in applications such as hinges for foldable smartphones, wearable medical sensors, and curved automotive instrument clusters. To address challenges such as bending stress and heat dissipation, the industry is continuously optimizing reliability through serpentine routing designs, nanofiller-reinforced substrates, and atomic layer deposition packaging. Simultaneously, these technologies are deeply integrated with flexible displays and stretchable electronics, evolving towards cutting-edge technologies such as integrated electronic skin systems and biodegradable circuits, reshaping the form and functionality of future electronic devices.

[0003] In view of the above analysis, the technical problems that need to be solved urgently in the existing technology are:

[0004] Overcome the limitations of traditional rigid circuits and the limitations of electrical appliance replacement. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a flexible wearable LED lamp circuit based on a flexible circuit and a switching platform thereof.

[0006] The present invention is implemented as follows: a flexible wearable LED lamp circuit based on a flexible circuit and its adapter platform, characterized in that the flexible LED lamp circuit mainly includes two parts: an LED lamp flexible circuit and a detachable adapter platform; the LED flexible circuit and the detachable adapter platform are directly connected through a DuPont line.

[0007] Furthermore, the LED flexible circuit is composed of a power input part, a small LED lamp and a voltage divider resistor, and is based on a flexible circuit substrate and is made by liquid metal printing.

[0008] Furthermore, the LED flexible circuit is designed with a detachable standardized interface, and on this basis, sensors that can support communication methods such as one wire I2C are added, so that related embedded engineering development can be carried out based on this project.

[0009] Furthermore, the LED flexible circuit is designed with a dynamic adjustment circuit to dynamically adjust the circuit resistance to control the brightness of the bulb.

[0010] Furthermore, the detachable adapter platform is composed of a base and a cover.

[0011] Furthermore, the base is a cylindrical structure with the bottom connected to the flexible circuit board (FPC), and the internal groove is provided with standardized electrical contact points; four slide rails are distributed on the side for access to the cover knob, which can be mechanically connected to the cover through a snap-on structure.

[0012] Furthermore, the back of the base is provided with four annular grooves, the depth and width of which are adapted to the DuPont wire.

[0013] Furthermore, the base has a diameter of 48mm and a height of 13.9mm, and is printed using resin material.

[0014] Furthermore, the cover plate is a cylindrical structure, and the internal cross bracket is used to carry different types of sensors and electrical components, and is connected to the base using copper sheets as contact surfaces.

[0015] Furthermore, the base of the cover has a diameter of 34.8 mm and a height of 10.2 mm, and is printed using resin material.

[0016] In combination with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solutions to be protected by the present invention are as follows:

[0017] First, the present invention overcomes the limitations of traditional rigid circuits and uses flexible circuits that are highly flexible, lightweight, thin, and require a small configuration space, making them convenient for use in the production of clothing.

[0018] This invention overcomes the limitations of electrical appliance replacement and designs a detachable standardized interface, which can realize the convenient replacement of electrical appliances and adapt to multi-functional operation. On this basis, sensors that can support one-wire I2C and other communication methods are added, and related embedded engineering development can be carried out based on this project.

[0019] The present invention designs a dynamic adjustment circuit to dynamically adjust the circuit resistance to control the brightness of the bulb.

[0020] Second, traditional inorganic light-emitting diodes (LEDs) are constructed on rigid substrates such as glass fiber reinforced epoxy copper clad laminates (FR4 PCBs). Their inherent mechanical properties limit their application in curved displays. From a materials science perspective, the FR4 substrate has a flexural modulus of up to 3.4 GPa and an elongation at break of less than 2%. This intrinsic rigidity causes it to undergo irreversible deformation when the radius of curvature is less than 5 cm. However, flexible LED systems using polyimide (PI) substrates have achieved breakthrough improvements in mechanical properties through material innovation: PI films have a tensile strength of up to 120 MPa and an elongation at break of over 200%. Dynamic mechanical analysis (DMA) shows a coefficient of thermal expansion (CTE) of only 4-6 ppm / °C in the range of -200°C to 300°C, which closely matches the thermal expansion characteristics of LED chips.

[0021] This innovation in material system brings performance improvement: in terms of mechanical reliability, flexible LED modules can withstand 10 5 The cyclic bending test with a curvature radius of 1mm for more than 10 times is far superior to the traditional LED 3 Secondly, in terms of spatial adaptability, the flexible LED array prepared based on the roll-to-roll (R2R) process can achieve an in-plane strain capacity of more than 30%, supporting seamless bonding of complex curved surfaces; more importantly, the dielectric constant (3.5@1MHz) and dissipation factor (0.02@1MHz) of the PI substrate are significantly better than those of traditional substrates. Combined with the silver nanowire transparent conductive layer (square resistance <10Ω / sq), the driving circuit efficiency is increased by more than 40%, and the power consumption is reduced to 0.5W / cm 2 Magnitude.

[0022] This shift in technological paradigm marks a leap forward in display technology from rigidity to flexibility and from planar to three-dimensional. Its interdisciplinary technological integration characteristics provide core component support for the new generation of foldable electronic devices, smart textiles and biomedical photonics, and have significant technical and economic value and social application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a circuit board provided by an embodiment of the present invention.

[0024] Figure 2 This is a planar structural diagram of the detachable adapter platform base provided by an embodiment of the present invention; (a) top view, (b) bottom view, and (c) side view.

[0025] Figure 3 2 is a three-dimensional schematic diagram of a detachable adapter platform base provided by an embodiment of the present invention; (a) front side, (b) back side.

[0026] Figure 4This is a planar structural diagram of the detachable transfer platform cover provided by an embodiment of the present invention; (a) top view, (b) side view.

[0027] Figure 5 It is a three-dimensional schematic diagram of a detachable adapter platform cover provided by an embodiment of the present invention.

[0028] Figure 6 It is a schematic diagram of the overall model of the detachable adapter platform provided in an embodiment of the present invention.

[0029] Figure 7 Schematic diagram of a three-dimensional model of a detachable adapter platform base provided in an embodiment of the present invention; (a) front side, (b) back side.

[0030] Figure 8 Schematic diagram of a three-dimensional model of a detachable adapter platform cover provided in an embodiment of the present invention; (a) front side, (b) back side.

[0031] Figure 9 This is a physical schematic diagram of a detachable adapter platform provided in an embodiment of the present invention.

[0032] Figure 10 This is a physical schematic diagram of a flexible wearable LED lamp circuit based on a flexible circuit and its adapter platform provided in an embodiment of the present invention.

[0033] Figure 11 Schematic diagram of a Multisim LED circuit simulation experiment provided by an embodiment of the present invention.

[0034] Figure 12 This is a voltage line graph provided by an embodiment of the present invention.

[0035] Figure 13 This is a preset finished product rendering provided by an embodiment of the present invention.

[0036] Figure 14 This is a line graph showing how the current of each LED changes with the resistance R2, provided by an embodiment of the present invention.

[0037] Figure 15 This is a line graph showing how the power of each LED changes with the resistance R2, provided by an embodiment of the present invention.

[0038] Figure 16 This is a line graph showing how the luminous flux of each LED changes with the resistance R2, provided by an embodiment of the present invention.

[0039] In the figure: 1, base; 1-1, internal groove; 1-2, slide rail; 1-3, annular groove; 2, cover plate; 2-1, cross bracket. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the 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.

[0041] An embodiment of the present invention provides a flexible wearable LED lamp circuit based on a flexible circuit and its adapter platform. The flexible LED lamp circuit mainly includes two parts: an LED lamp flexible circuit and a detachable adapter platform; the LED flexible circuit and the detachable adapter platform are directly connected via a DuPont line.

[0042] Circuit board schematic diagram Figure 1 shown.

[0043] The LED flexible circuit consists of a power input part, a small LED light and a voltage divider resistor, and is based on a flexible circuit substrate. It has the characteristics of being resistant to bending, easy to conform, light in weight and thin in thickness, and is convenient for the production of clothing.

[0044] The LED flexible circuit is made by liquid metal printing, has strong bending resistance, good conformality and certain adaptability.

[0045] The LED flexible circuit is designed with a detachable standardized interface, which can realize the convenient replacement of electrical appliances and adapt to multi-functional operation. On this basis, sensors that can support one wire, I2C and other communication methods are added. Related embedded engineering development can be carried out based on this project.

[0046] The LED flexible circuit is designed with a dynamic adjustment circuit to dynamically adjust the circuit resistance to control the brightness of the bulb.

[0047] like Figure 6 As shown, the detachable transfer platform is composed of a base and a cover.

[0048] like Figure 2 As shown, the base portion: Base 1 is a cylindrical structure, connected to the flexible printed circuit board (FPC) at the bottom. The internal groove 1-1 is equipped with standardized electrical contacts. The base has a diameter of 48mm and a height of 13.9mm, and is printed using resin. Four slide rails 1-2 are located on the side for access to the knobs of cover 2, which are mechanically connected to cover 2 via a snap-on mechanism.

[0049] There are four annular grooves 1-3 on the back of the base 1, the depth and width of which are adapted to the 1mm diameter of the DuPont wire. The annular groove design ensures that the DuPont wires are neatly arranged along the back of the base and led out on the same side, which facilitates subsequent welding operations. At the same time, it provides physical protection for the DuPont wires and reduces wire damage caused by external force or deformation.

[0050] like Figure 4As shown, the cover plate 2 is a cylindrical structure with an internal cross bracket 2-1 for carrying various sensors and electrical components. Copper sheets serve as contact surfaces for connection to the base. The base of the cover plate has a diameter of 34.8mm and a height of 10.2mm, and is printed using resin.

[0051] In the wearable device sector, traditional rigid circuit structures commonly suffer from poor flexibility, high integration difficulty, and inability to conform to non-planar human surfaces. These limitations are particularly pronounced in applications such as dynamic clothing lighting and flexible sensing control. Furthermore, difficulties with modular expansion, inconsistent interface standards, and exposed and fragile wiring significantly restrict scenario-based deployment and ongoing maintenance. Therefore, achieving an integrated structural design that combines flexibility, standardized interfaces, damage resistance, and intelligent control capabilities has become a critical issue that urgently needs to be addressed.

[0052] This invention utilizes a flexible printed circuit (FPC) as a substrate. The LED circuitry, comprised of a power input terminal, a resistor divider, and several LED beads, features a rational layout and is easily customizable. The flexible substrate utilizes liquid metal conductor direct printing technology to achieve conductor routing. This material exhibits excellent bending fatigue life and high conformability, significantly improving the device's adaptability and durability to clothing applications. This structure optimizes the conductive path to avoid short circuits caused by minor deformation, ensuring stable light emission during long-term wear.

[0053] In the electrical connection part, the present invention innovatively designs annular grooves 1-3 (such as Figure 2 b), this groove accommodates standard DuPont wire (1mm diameter), providing orderly confinement and physical protection, reducing the risk of wire breakage due to pulling or bending. Furthermore, the slide rail structure 1-2, coupled with a knob-type mechanical buckle, allows for convenient and secure assembly and disassembly of the cover 2 and base 1, greatly enhancing the ease of modular replacement.

[0054] In order to meet the needs of scenario-based use, the LED flexible circuit is integrated with a dynamic adjustment circuit module, which can adjust the current size according to the real-time change of resistance, thereby realizing adaptive control of the brightness of the lamp beads (such as night / ambient light change adjustment). In addition, the cross bracket 2-1 ( Figure 4 a) It has reserved multi-protocol communication interfaces, such as One Wire and I2C, and can carry sensor modules such as temperature and humidity, heart rate, and acceleration. It can also achieve conduction with the base through standard electrical contact copper sheets, enhancing system scalability.

[0055] The transfer platform consists of a base 1 and a cover 2 ( Figure 6) is composed of two parts. The base has a fixed interface at the bottom for connecting to the LED flexible main circuit. Its structure is a cylindrical structure supported by reinforced ribs, providing excellent mechanical support and adapting to repeated assembly operations. The cross-bracing structure 2-1 of the cover 2 is designed to balance ventilation and heat dissipation while providing space for component installation. It is 3D-printed from a resin polymer material, resulting in a lightweight and stable structure that effectively protects the mounted circuit module from external impact.

[0056] During use, the LED flexible circuit is connected to the electrical contact 1-1 on the base 1 via DuPont wire. Grooves 1-3 on the back of the base guide the wiring harness and reduce stress concentration. Based on sensor or functional requirements, the user installs the cover 2 containing the sensor element onto the base, and securely connects it via the slide rails 1-2 and the internal snap-on structure. During operation, the sensor collects data and transmits it to the main control module. The main control module adjusts the resistance value in the dynamic circuit based on the data, thereby achieving intelligent brightness adjustment or mode switching of the lamp beads. The entire system achieves the composite functional goals of plug-and-play, anti-bending wearability, module replaceability, and sensor scalability.

[0057] LED flexible circuits combine the efficient light-emitting properties of LEDs with the bendability of flexible substrates, giving them unique application potential in a wide range of fields. In the field of smart wearables and health monitoring, they can be used in wearable health monitoring devices or flexible lighting in medical devices, such as the lighting part of endoscopes, which require soft and small LED circuits. Wearable devices such as smart bracelets, LED decorations on clothing, or indicator lights in sportswear all require flexible circuits to adapt to the curves of the human body and improve comfort. Their adapter platforms are detachable, supporting modular functional component replacement and flexible expansion of wearable device functions.

[0058] Use Multisim to conduct simulation experiments such as Figure 11 Changing the load R2 resistance value, performing linear simulation from 7.5K to 12.5K, with the R2 voltage as the output value, the data is shown in Table 1, and the line graph is shown in Figure 12 .

[0059] Table 1 Voltage simulation data table

[0060] R2 / Ω V(R2) / V 7500 2.14 7750 2.18 8000 2.22 8250 2.26 8500 2.30 8750 2.33 9000 2.37 9250 2.40 9500 2.43 9750 2.47 10000 2.50 10250 2.53 10500 2.56 10750 2.58 11000 2.61 11250 2.63 11500 2.65 11750 2.68 12000 2.69 12250 2.71 12500 2.73

[0061] The preset finished product effect is as follows Figure 13 The power and current of each LED vary with the resistance R2. Figure 14 、 Figure 15 .

[0062] Assuming the blue LED luminous efficiency is 72.5lm / W, the luminous flux is:

[0063] Φ=η×Ρ

[0064] Wherein, Φ represents the luminous flux of the LED lamp (lm) and is used to indicate the brightness of the LED lamp, η represents the luminous efficacy of the LED lamp (lm / W), and P represents the power of the LED lamp (W).

[0065] Therefore, the line graph of the small lamp brightness changing with the resistance R2 is as follows: Figure 16 shown.

[0066] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with this technical field within the technical scope disclosed by the present invention and within the spirit and principles of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A flexible wearable LED light circuit based on a flexible circuit and its adapter platform, characterized in that: The flexible LED lamp circuit mainly includes two parts: LED lamp flexible circuit and detachable adapter platform; The LED flexible circuit and the detachable transfer platform are directly connected via a DuPont line.

2. The flexible wearable LED light circuit and its adapter platform based on the flexible circuit as claimed in claim 1, characterized in that: The LED flexible circuit consists of a power input part, a small LED lamp and a voltage divider resistor, and is based on a flexible circuit substrate and is made by liquid metal printing.

3. The flexible wearable LED light circuit and its adapter platform based on the flexible circuit as claimed in claim 1, characterized in that: The LED flexible circuit is designed with a detachable standardized interface, and on this basis, sensors that can support communication methods such as one wire I2C are added. Related embedded engineering development can be carried out based on this project.

4. The flexible wearable LED light circuit and its adapter platform based on the flexible circuit as claimed in claim 1, characterized in that: The LED flexible circuit is designed with a dynamic adjustment circuit to dynamically adjust the circuit resistance to control the brightness of the bulb.

5. The flexible wearable LED light circuit and its adapter platform based on flexible circuit as claimed in claim 1, characterized in that: The detachable transfer platform consists of a base and a cover plate.

6. The flexible wearable LED light circuit and its adapter platform based on the flexible circuit as claimed in claim 5, characterized in that: The base is a cylindrical structure with the bottom connected to the flexible printed circuit board (FPC). The internal groove is equipped with standardized electrical contact points. Four sliding rails are distributed on the side for accessing the cover knob, which can be mechanically connected to the cover through a snap-on structure.

7. The flexible wearable LED light circuit and its adapter platform based on flexible circuit as claimed in claim 5, characterized in that: There are four annular grooves on the back of the base, the depth and width of which are suitable for DuPont wires.

8. The flexible wearable LED light circuit and its adapter platform based on flexible circuit as claimed in claim 5, characterized in that: The base has a diameter of 48mm and a height of 13.9mm and is printed in resin material.

9. The flexible wearable LED light circuit and its adapter platform based on flexible circuit as claimed in claim 5, characterized in that: The cover is a cylindrical structure, and the internal cross bracket is used to carry different types of sensors and electrical components, and the copper sheet is used as the contact surface to connect to the base.

10. The flexible wearable LED light circuit and its adapter platform based on flexible circuit as claimed in claim 5, characterized in that: The cover base has a diameter of 34.8mm and a height of 10.2mm and is printed using resin material.

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