Three-Wire Light String Circuit Layout for Faster Assembly
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Solution Overview
Problem
The assembly of light strings is inefficient due to the need for multiple solder joints and multiple sets of power supply cords, which increases cost and time, especially when multiple light colors are required.
Innovation Solution
A power supply cord with three parallel wires is used, each connected to a circuit board via a welding portion, and each circuit board has a light-emitting assembly with three light-emitting elements, allowing for efficient electrical connectivity through reduced solder joints and simplified assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sets of power supply cords are used with individual soldering for each luminous unit, then electrical connectivity is achieved, but assembly efficiency deteriorates and production time increases
Solution Approach 1:
Multiple power supply cords are merged into a single power supply cord that integrates multiple wires (first wire, second wire, third wire) with different functions. This consolidation reduces the number of separate soldering operations while maintaining all necessary electrical connections for multiple light-emitting elements.
Solution Approach 2:
The single power supply cord is designed with multi-functionality, where different wires serve different purposes: the first wire connects to positive electrodes, the second wire connects to negative electrodes, and the third wire provides common connections. This universal design allows one cord to replace multiple specialized cords.
2Adaptability or versatility
If multiple sets of power supply cords with multiple wires are used for each light color, then multiple light colors are achieved, but cost increases
Solution Approach 1:
The power supply cord achieves multi-functionality by using a third wire that can serve as a common connection for multiple light-emitting elements. This allows the same three-wire configuration to support multiple colors of light without increasing the wire count, as each wire type (first, second, third) serves multiple functional roles across different light-emitting elements.
Solution Approach 2:
Multiple wire functions are merged into a three-wire configuration. Instead of using separate wires for each light color, the patent combines the functionality of multiple wires into three shared wires that can be configured to support various light-emitting elements through different connection patterns.
3Reliability
If multiple solder joints are used for connecting power supply cords to each luminous unit, then electrical connectivity is ensured, but manufacturing complexity and time increase
Solution Approach 1:
Multiple separate soldering operations are merged into a single soldering operation. By consolidating multiple power supply cords into one integrated cord with multiple wires, all necessary electrical connections can be established through one soldering process rather than multiple separate soldering steps for each cord.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design reduces the number of solder joints and welding time, lowers production costs, and enhances assembly efficiency while maintaining the ability to produce multiple colors of light.
Implementation Method 1
each circuit board is welded to a corresponding set of the welding portions to electrically connect the circuit board to the power supply cord
Data Source
AI summary
A light string, including a power supply cord and circuit boards. The power supply cord has welding portions, and each circuit board is welded to a corresponding set of welding portions. The power supply cord includes a first, a second, and a third wire. Each circuit board is arranged with a first, a second, and a third light-emitting element; a positive electrode of the first light-emitting element is connected to the first wire, and a negative electrode is connected in parallel to the second wire and the third wire; a positive electrode of the second light-emitting element is connected to the second wire, and a negative electrode is connected in parallel to the first wire and the third wire; a positive electrode of the third light-emitting element is connected to the third wire, and a negative electrode is connected in parallel to the first wire and the second wire.