Screw Mounted LED Lamp String with Planar Electrodes
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Solution Overview
Problem
Conventional LED lamp strings with two-pin copper knife plugs are not compatible with outdoor screw-type power supply lines, leading to inconvenience in outdoor installations, and the encapsulation structure of LED bulbs has a small soldering area and limited illumination angle due to bowl-shaped grooves, causing instability and unsatisfactory lighting.
Innovation Solution
A screw mounted lamp string design that directly connects to screw holders, featuring planar electrode connections for improved soldering and illumination, along with a bridge rectifier and current-limiting resistor for power management and safety, allowing for 180-degree illumination and enhanced durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional two-pin copper knife plugs are used for LED lamp strings, then indoor power supply connection is achieved, but outdoor screw-type power supply compatibility is lost
Solution Approach 1:
The LED lamp string is equipped with a screw head that can directly connect to screw-type power supply lines, enabling the same lamp string to be used both indoors with two-pin plugs and outdoors with screw-type power supplies, thus achieving multi-functionality and universal adaptability
2Illumination intensity
If bowl-shaped grooves are used for LED bulb encapsulation, then LED mounting is achieved, but illumination angle is limited to less than 120 degrees
Solution Approach 1:
Instead of using a bowl-shaped groove that confines the LED, the invention inverts the approach by using a planar electrode connection structure that allows the LED to be mounted flatly, enabling light to emit in all directions including sideways, thus achieving 180-degree illumination angle
3Strength
If small soldering area is used in LED bulb encapsulation, then compact structure is achieved, but tensile strength of solder joints is low (about 5 g)
Solution Approach 1:
The encapsulation structure is segmented into distinct functional zones: a planar electrode connection area with large surface area for strong solder joints, and a separate encapsulation area for the LED chip. This segmentation allows the soldering area to be enlarged independently without increasing the overall bulb volume excessively
4Ease of operation
If additional power supply lines with two-pin sockets are arranged for outdoor use, then power supply compatibility is achieved, but installation convenience is reduced
Solution Approach 1:
The LED lamp string is equipped with a screw head that enables it to directly connect to screw-type power supply lines commonly used in outdoor environments, making the lamp string self-sufficient for outdoor installation without requiring additional adapter cables or complex wiring arrangements
Data Source
AI summary
Disclosed is a screw mounted lamp string, comprising a LED lamp string having a number of LED holders connected with each other by wires and corresponding LED bulbs; wherein the screw mounted lamp string comprises a screw head; the live wire contact of the screw head is connected with a corresponding fuse tube, which is connected with the LED lamp string by wires. The screw head of the screw mounted lamp string can directly connect with the screw string, thereby realizing power supply to the LED lamp string, without additional power supply lines, which is saving costs, improving the convenience of using the LED lamp string, and improving the soldering efficiency of the patch LED and the resistance to external force impact, thus enabling the lamp string of the disclosure to have a better application effect in outdoor scenes.