Four-Wire Double-Sided PCB LED Lamp for 360° Light and Easier Welding
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Solution Overview
Problem
LED lamps face issues with welding short circuits due to small mating pads and thicker wires, and there is a need for 360° circumferential light emission, especially in linear lamps and lamp strings.
Innovation Solution
A four-wire double-sided PCB design with electrodes connected to both sides of the PCB, allowing for 360° light emission and easy connection with thicker wires, featuring parallel LED luminous bodies and electrodes that penetrate or are connected via vias.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If wires become thicker to improve carrying capacity, then power transmission capability is improved, but welding difficulty increases and mating pad short circuit risk increases
Solution Approach 1:
The patent introduces a PCB board as an intermediary component between the thicker power wires and the LED luminous bodies. The PCB provides standardized electrode interfaces that are easier to weld than direct wire connections to small LED pads, while still accommodating thicker wires for improved power transmission capability.
Solution Approach 2:
The patent segments the electrical connection system into distinct functional parts: thicker external wires for power transmission, PCB electrodes for stable mounting and signal distribution, and LED luminous bodies for light emission. This segmentation allows each component to be optimized independently, solving the welding difficulty while maintaining power transmission capability.
2Temperature
If LED luminous bodies are spaced apart on linear conductors, then heat dissipation is improved, but light-emitting surface area decreases
Solution Approach 1:
The patent transitions from a one-dimensional linear arrangement of LED luminous bodies to a two-dimensional PCB surface mounting configuration. This allows LEDS to be distributed across the PCB surface area, increasing the effective light-emitting surface while maintaining adequate spacing for heat dissipation through the PCB substrate.
3Ease of manufacture
If LED luminous bodies are mounted on one side of PCB, then manufacturing is simplified, but light emission is limited to one side
Solution Approach 1:
The patent extracts the LED luminous bodies from a single-sided mounting configuration and implements them on both the obverse and reverse sides of the PCB. This dual-sided mounting approach maintains manufacturing simplicity through standardized PCB processes while doubling the light emission coverage to achieve 360° illumination.
4Illumination intensity
If more LED luminous bodies are added to increase light output, then illumination intensity is improved, but wire thickness must increase
Solution Approach 1:
The patent implements a multi-functional PCB electrode system where the same PCB structure serves multiple purposes: mechanical support for numerous LEDS, electrical connection network, heat dissipation path, and interface for external wiring. This allows increased light output through multiple LEDs without proportionally increasing wire thickness, as the PCB distributes the electrical load efficiently.
Data Source
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AI summary
An LED lamp with a four-wire double-sided PCB includes a PCB, wherein the PCB is provided with a first LED luminous body and a second LED luminous body, respectively at the central regions of the obverse and reverse sides of the PCB to realize 360° light emission; the PCB is also sequentially provided with four electrodes around any one of the two central regions, wherein two electrodes are respectively configured to be connected with different signal terminals of the two LED luminous bodies; the remaining two electrodes are respectively configured to be connected with different power supply terminals of the two LED luminous bodies. The LED lamp provided by the present disclosure can emit light on both sides, and truly realize 360° light emission; under the condition that the LED luminous bodies on both sides are normal, the situation that the obverse side is bright and the reverse side is dark will not occur, and the problems in the prior art that the luminous point is amplified due to the fact that only one side of the LED lamp emits light, and there is a shadow will not occur.