Non-polar wide voltage module and energy-saving LED lamp

Abstract

This utility model discloses a non-polarized wide-voltage module and an energy-saving LED lamp. The module includes a rectifier bridge, a filter capacitor, a step-down constant current controller, an inductor, and a current sampling resistor. The input terminal of the rectifier bridge is used to connect to an external power supply. The filter capacitor is connected between the output terminal of the rectifier bridge and ground. The step-down constant current controller uses a PT4115E chip, with its voltage input terminal connected to the output terminal of the rectifier bridge, and its output terminal connected to the LED lamp through an inductor and a current sampling resistor. These components together constitute a step-down constant current control circuit in continuous conduction mode, realizing constant current drive for the LED lamp within the DC 12V to 24V input voltage range. The LED lamp includes a plastic shell, an optical lens board, a PCB control board, multiple LED beads, and wires. The PCB control board has a non-polarized wide-voltage module. This high-efficiency LED module can simultaneously achieve non-polarized wiring, wide voltage input, ultra-long cascading, and consistent brightness, solving the problems of inconvenient user installation, poor power supply compatibility, and cascading attenuation.

Description

Technical Field

[0001] This utility model relates to LED lighting technology, and in particular to a non-polar wide voltage module and an energy-saving LED lamp. Background Technology

[0002] Currently, the LED modules commonly used for advertising signs on the market generally have the following technical limitations: First, their power input terminals are usually distinguished by positive and negative terminals. Users must connect the positive and negative terminals of the power supply to the module in the correct order during installation and use. If the connection is reversed, the module may not light up or may even be damaged, which increases the complexity of installation and the risk of use.

[0003] Secondly, conventional LED modules often use a single operating voltage design, such as supporting only specific voltages like DC12V or DC24V. Users must equip themselves with a driver power supply that is strictly matched to the module voltage, which not only increases the variety and cost of power supplies but also lacks flexibility in practical applications.

[0004] Furthermore, in cascaded applications of multiple modules, a significant voltage drop at the end is a common problem due to circuit impedance and wiring losses. Existing products generally only support cascading up to 20 modules; beyond this number, noticeable brightness differences appear between the first and last modules. Users often need to alleviate the voltage drop problem by adding extra power or rewiring, leading to increased labor and material costs.

[0005] Although some LED modules employ linear constant current solutions or high-brightness LED chips to improve cascading length and luminous efficacy, they still struggle to simultaneously meet the comprehensive needs of high-end users for strong power compatibility, easy installation, energy efficiency, and low maintenance costs. Therefore, a new LED module structure is urgently needed that can accommodate non-polar input, operate across a wide voltage range, support ultra-long cascading, and maintain consistent brightness. Utility Model Content

[0006] In view of this, the present invention addresses the shortcomings of existing technologies, and its main objective is to provide a non-polarized wide-voltage module and energy-saving LED lamp. Specifically, it provides a non-polarized wide-voltage energy-saving LED module lamp to solve problems such as the requirement to distinguish positive and negative terminals in existing advertising sign LED modules, support for only a single voltage, short cascade length, and inconsistent brightness at the beginning and end. By employing a rectifier bridge to achieve non-polarized reverse connection protection, and utilizing a PT4115E-based step-down constant current control circuit to achieve constant current output under a wide DC12-24V input voltage, it supports cascading of a large number of modules while maintaining uniform brightness. Ultimately, it achieves user-friendly wiring, strong power adaptability, flexible installation, and energy-efficient performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A non-polar wide voltage module includes a rectifier bridge, a filter capacitor, a step-down constant current controller, an inductor, and a current sampling resistor;

[0009] The input terminal of the rectifier bridge is used to connect to an external power supply to form a non-polarity reverse connection protection circuit.

[0010] The filter capacitor is connected between the output terminal of the rectifier bridge and ground to filter out input voltage ripple.

[0011] The step-down constant current controller uses a PT4115E chip. Its voltage input terminal is connected to the output terminal of the rectifier bridge, and its output terminal is connected to the LED light through the inductor and the current sampling resistor.

[0012] The step-down constant current controller, inductor, and current sampling resistor together constitute a step-down constant current control circuit in continuous conduction mode, enabling constant current drive of the LED lamp within the DC 12V to 24V input voltage range.

[0013] As a preferred embodiment, the rectifier bridge is a small-package rectifier bridge, which is used to enable arbitrary connection of the input lines regardless of their polarity.

[0014] As a preferred embodiment, the capacitance of the filter capacitor is 100nF.

[0015] As a preferred embodiment, the DIM pin of the buck constant current controller is configured in DC voltage mode to achieve wide-range current regulation.

[0016] As a preferred embodiment, the LED light operates at a voltage of 9V.

[0017] As a preferred embodiment, the module supports the cascading of up to 130 identical modules, and the brightness of the first and last modules is consistent after cascading.

[0018] As a preferred embodiment, the input voltage operating range of the step-down constant current controller is 6V to 60V.

[0019] A non-polar, wide-voltage energy-saving LED lamp includes a plastic housing, an optical lens board, a PCB control board, multiple LED beads, and wires. The PCB control board has the non-polar, wide-voltage module. The plastic housing has recessed cavities for mounting the optical lens board and the PCB control board, and the PCB control board is embedded in the cavities. The LED beads are electrically soldered to the PCB control board. The wires are electrically connected to the PCB control board and extend from both ends of the plastic housing through the cavities. The optical lens board covers the cavities, and each LED bead on the optical lens board has a curved lens.

[0020] As a preferred embodiment: the PCB control board is provided with positioning holes at intervals, and the optical lens board is provided with positioning posts corresponding to the positioning holes, with the positioning posts being inserted into the positioning holes.

[0021] As a preferred embodiment: an embedding groove is provided around the accommodating cavity, and an embedding ring plate is protruding from the lower surface of the PCB control board. The embedding ring plate is embedded in the embedding groove, and the PCB control board is located inside the embedding ring plate. A positioning notch is provided inside the embedding groove, and a positioning block is provided on the outer wall of one end of the embedding ring plate corresponding to the positioning notch. The positioning block is embedded in the positioning notch.

[0022] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the circuit and structural design brings about a number of significant beneficial effects.

[0023] First, by using a rectifier bridge (DB1) at the input end, a non-polarity connection of the power line is achieved, so users do not need to distinguish between positive and negative terminals to complete the wiring. The wiring is simple and easy to install; it greatly reduces the difficulty of installation and the risk of failure caused by reverse connection, and improves the convenience and safety of use.

[0024] Secondly, the module employs a step-down constant current control scheme based on the PT4115E chip, enabling stable operation within a wide voltage range of DC 12V to 24V, reducing the variety of power supplies customers need to stock. It also maintains a constant LED current, ensuring consistent brightness. Users do not need to stock multiple power supplies for different voltages, effectively reducing inventory costs and power supply types. The module supports ultra-long cascading of up to 130 units, allowing for immediate use with minimal wiring and ensuring safe and convenient operation. Furthermore, in cascaded applications, the brightness of the first and last modules remains consistent, resolving the issue of brightness attenuation at the end due to line voltage drop. Users do not need additional power supply or rewiring in long-distance applications, significantly saving labor and material costs.

[0025] Finally, through the combination of efficient constant current drive and high-efficiency LEDs, a luminous efficacy of up to 190 LM / W is achieved, providing high-brightness lighting while exhibiting excellent energy-saving performance.

[0026] To more clearly illustrate the structural features and effects of this utility model, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the non-polar wide voltage module circuit of this utility model;

[0028] Figure 2 This is a schematic diagram of the energy-saving LED lamp of this utility model;

[0029] Figure 3 This is a cross-sectional view of the energy-saving LED lamp of this utility model;

[0030] Figure 4 This is an exploded perspective view of the energy-saving LED lamp of this utility model;

[0031] Figure 5 This is an exploded perspective view of the energy-saving LED lamp of this utility model;

[0032] Figure 6 This is a schematic diagram of another type of energy-saving LED lamp according to this utility model.

[0033] Explanation of reference numerals in the attached diagram:

[0034] 10. Plastic shell; 11. Receiving cavity; 12. Embedding groove; 13. Positioning notch; 20. Optical lens plate; 21. Curved lens; 22. Positioning post; 23. Embedding ring plate; 24. Positioning block; 30. PCB control board; 31. Positioning hole; 40. LED lamp bead; 50. Wire. Detailed Implementation

[0035] This utility model is as follows Figures 1 to 6 As shown, a non-polarized wide-voltage module and an energy-saving LED lamp include a plastic shell, an optical lens board, a PCB control board, multiple LED beads, and wires. The PCB control board is the core component, on which the non-polarized wide-voltage module is integrated. The circuit structure of this module is as follows: Figure 1 As shown.

[0036] The non-polarity wide-voltage module includes a rectifier bridge DB1, a filter capacitor C1, a buck constant current controller U1 (using a PT4115E chip), an inductor L1, and a current sampling resistor RS. The input terminal of the rectifier bridge DB1 is connected to an external power supply wire, utilizing the unidirectional conduction characteristic of its internal diodes to achieve non-polarity connection, allowing users to complete wiring without distinguishing between positive and negative terminals. The filter capacitor C1 (100nF) is connected between the output terminal of the rectifier bridge DB1 and ground to filter out high-frequency ripple in the input voltage, improving the stability of the circuit operation.

[0037] The voltage input terminal of the buck constant current controller U1 is connected to the output terminal of the rectifier bridge DB1. Its output terminal is connected in sequence to inductor L1 and current sampling resistor RS, ultimately driving the LED. The DIM pin of the U1 chip is configured to DC voltage mode via an external resistor, enabling wide-range adjustment of the output current. This circuit operates in continuous conduction mode. When the input voltage varies between DC 12V and 24V, the internal feedback regulation mechanism of U1, in conjunction with the external inductor L1 and sampling resistor RS, maintains a constant current through the LED, thus ensuring consistent brightness even at a working voltage of 9V. The actual input voltage operating range of the U1 chip is 6-50V, ensuring wide-voltage operation.

[0038] The plastic housing is injection molded, and has a recessed cavity for mounting the optical lens board and the PCB control board. An annular mounting groove is provided around the cavity, and a corresponding mounting ring plate is provided on the lower surface of the PCB control board. During installation, the mounting ring plate of the PCB control board is inserted into the mounting groove of the plastic housing, with the PCB control board positioned inside the mounting ring plate. Furthermore, a positioning notch located inside the mounting groove engages with a positioning block on the outer wall of the mounting ring plate to prevent misalignment and ensure correct installation orientation.

[0039] Multiple LED beads are arranged at a certain interval and soldered onto the PCB control board. An optical lens plate, made of light-transmitting material, is placed above the housing cavity. Each LED bead has a corresponding curved lens on the optical lens plate to improve light distribution and increase light extraction efficiency. The optical lens plate also has multiple positioning posts, and the PCB control board has corresponding positioning holes. The precise alignment of the optical lens plate and the PCB control board is ensured through the interlocking of the positioning posts and holes.

[0040] The wires are soldered to the pads at both ends of the PCB control board and extend from both ends of the plastic casing for connecting to an external power supply and cascading other modules. This module supports the series cascading of up to 130 identical modules. Under rated operating conditions, the brightness of the first and last modules remains consistent, eliminating the need for mid-process power replenishment.

[0041] The installation process of this LED light is as follows: First, the LED beads and other electronic components are soldered onto the PCB control board using solder paste to form a semi-finished PCBA; then, the optical lens board is placed in the mold, and the PCBA board is embedded into the inner side of the mounting ring of the optical lens board, so that the positioning holes on the PCB control board are accurately aligned with the positioning posts on the optical lens board; finally, the assembled components are placed into the injection mold, and plastic material is used for encapsulation injection molding. After the outer plastic is molded, a plastic shell is formed, and the whole structure forms the final product.

[0042] This product is an LED light module string, used in the lighting of LED illuminated letters or advertising light boxes.

[0043] When using this energy-saving LED light, users do not need to distinguish between positive and negative terminals, making power connection convenient; and there is no need to prepare multiple power supplies, reducing inventory; in addition, the ultra-long cascading reduces the number of times users need to connect power. When the quantity used is less than the number of cascaded units, it can be cut at will, ready to use immediately, greatly reducing labor.

[0044] The key design feature of this invention lies in the collaborative operation of the rectifier bridge (DB1) and the PT4115E buck constant current controller (U1), which form the core of the non-polarized wide-voltage drive circuit. The rectifier bridge converts inputs of arbitrary polarity into outputs of uniform polarity, fundamentally eliminating reverse connection issues. The PT4115E chip, along with its external inductor (L1) and current sampling resistor (RS), constitutes a continuously conducting buck constant current source. By setting its DIM pin to DC voltage mode, precise wide-range adjustment of the LED current is achieved, ensuring stable output within a wide input voltage range of DC12-24V, thus achieving wide voltage adaptability and no attenuation over long cascades.

[0045] Secondly, the design focuses on its highly integrated and stable mechanical structure. The PCB control board, serving as the carrier of all electronic components, has positioning holes that precisely match the positioning posts on the optical lens board, ensuring accurate alignment of the optical components with the light source (LED beads), thus guaranteeing the final optical effect and light output efficiency. The plastic shell encapsulates the PCBA, lens, and other components into a single unit through injection molding. The mounting grooves around its housing interlock with the mounting rings on the PCB board, and the unique error-proof design of the positioning notches and blocks ensures correct assembly on the first attempt and the structural stability, sealing, and consistency of the final product, improving its durability and reliability. This invention simultaneously incorporates advanced circuit principles and a sophisticated physical structure; the two are closely integrated to achieve a series of excellent characteristics such as non-polarity, wide voltage range, long cascade capability, and high luminous efficiency.

[0046] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A non-polarity wide voltage module, characterized in that: It includes a rectifier bridge, filter capacitors, a step-down constant current controller, inductors, and current sampling resistors; The input terminal of the rectifier bridge is used to connect to an external power supply to form a non-polarity reverse connection protection circuit. The filter capacitor is connected between the output terminal of the rectifier bridge and ground to filter out input voltage ripple. The step-down constant current controller uses a PT4115E chip. Its voltage input terminal is connected to the output terminal of the rectifier bridge, and its output terminal is connected to the LED light through the inductor and the current sampling resistor. The step-down constant current controller, inductor, and current sampling resistor together constitute a step-down constant current control circuit in continuous conduction mode, enabling constant current drive of the LED lamp within the DC 12V to 24V input voltage range.

2. The non-polar wide voltage module according to claim 1, characterized in that: The rectifier bridge is a small-package rectifier bridge.

3. The non-polarity wide voltage module according to claim 1, characterized in that: The capacitance of the filter capacitor is 100nF.

4. The non-polar wide voltage module according to claim 1, characterized in that: The DIM pin of the buck constant current controller is configured for DC voltage mode.

5. The non-polar wide voltage module according to claim 1, characterized in that: The LED light operates at a voltage of 9V.

6. The non-polar wide voltage module according to claim 1, characterized in that: The module supports the cascading of up to 130 identical modules, and the brightness of the first and last modules is consistent after cascading.

7. The non-polarity wide voltage module according to claim 1, characterized in that: The input voltage operating range of the buck constant current controller is 6V to 60V.

8. A non-polar, wide-voltage energy-saving LED lamp, characterized in that: The device includes a plastic housing, an optical lens plate, a PCB control board, multiple LED beads, and wires. The PCB control board has a non-polar wide voltage module as described in any one of claims 1-7. The plastic housing has recessed cavities for mounting the optical lens plate and the PCB control board, and the PCB control board is embedded in the cavities. The LED beads are electrically soldered to the PCB control board. The wires are electrically connected to the PCB control board and extend from both ends of the plastic housing through the cavities. The optical lens plate covers the cavities, and each LED bead on the optical lens plate has a curved lens.

9. The non-polar, wide-voltage energy-saving LED lamp according to claim 8, characterized in that: The PCB control board is provided with positioning holes at intervals, and the optical lens board is provided with positioning posts corresponding to the positioning holes, with the positioning posts being inserted into the positioning holes.

10. The non-polar, wide-voltage energy-saving LED lamp according to claim 8, characterized in that: The accommodating cavity is provided with an embedding groove around its periphery, and an embedding ring plate is provided with a protrusion on the lower surface of the PCB control board. The embedding ring plate is embedded in the embedding groove, and the PCB control board is located inside the embedding ring plate. A positioning notch is provided inside the embedding groove, and a positioning block is provided on the outer wall of one end of the embedding ring plate corresponding to the positioning notch. The positioning block is embedded in the positioning notch.

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