LED-Embedded Light String with High- and Low-Voltage Sections

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Solution Overview

Problem

Existing low-voltage LED light strings suffer from short series connection distances, severe voltage drop, and inconsistent brightness due to line loss and voltage drop, leading to failure in series connection with high-voltage light strings.

Innovation Solution

An LED-embedded light-emitting wire light string design that integrates high-voltage and low-voltage lamps, using a main wire composed of high-voltage and low-voltage core wires, with a light-transmitting film for uniform light distribution, and a rectifier drive board for independent power supply to each lamp, allowing for longer connections and stable lighting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If low-voltage LED light strings are used for flexible and portable power supply, then ease of operation is improved, but connection length is limited due to severe voltage drop

Engineering Contradiction:
ImproveportabilityVSAvoidconnection length
Core Design Contradiction:
Ease of operationVSLength of stationary object

Solution Approach 1:

The patent combines high-voltage and low-voltage lighting systems into a single integrated light string. The main wire contains both high-voltage bulbs and low-voltage LED lamp beads, allowing the product to maintain portability while extending connection length through dual-power supply capability

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The light string is designed to support both high-voltage and low-voltage power sources simultaneously. The main wire can be powered by either high-voltage AC power or low-voltage battery power, making it adaptable to different usage scenarios and extending its application range

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If low-voltage LED light strings are used for flexible power supply, then ease of operation is improved, but brightness uniformity deteriorates due to inconsistent brightness at beginning and end

Engineering Contradiction:
ImproveflexibilityVSAvoidbrightness uniformity
Core Design Contradiction:
Ease of operationVSIllumination intensity

Solution Approach 1:

The patent merges high-voltage bulbs and low-voltage LED lamp beads on the same main wire. This combination allows different sections of the light string to be powered by different voltage sources, compensating for voltage drop effects and achieving more uniform brightness distribution along the entire length

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

Different sections of the main wire can have different lighting characteristics. High-voltage bulbs provide stable brightness in sections where voltage supply is consistent, while low-voltage LED lamp beads compensate in sections affected by voltage drop, creating locally optimized brightness uniformity

Inventive Principle:
Principle #3Local quality

3Device complexity

If traditional low-voltage and high-voltage light strings are used separately, then simplicity is maintained, but adaptability deteriorates due to failure in series connection

Engineering Contradiction:
Improvesystem simplicityVSAvoidseries connection capability
Core Design Contradiction:
Device complexityVSAdaptability or versatility

Solution Approach 1:

The light string incorporates both high-voltage and low-voltage power capabilities in a single device. The main wire can connect to high-voltage AC power sources or low-voltage battery sources, enabling the product to be adapted to different power supply systems and allowing series connection with various types of light strings

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The lighting system is segmented into high-voltage bulb sections and low-voltage LED lamp bead sections on the main wire. This segmentation allows flexible configuration and connection with different power sources, improving adaptability while maintaining relatively simple system architecture

Inventive Principle:
Principle #1Segmentation

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

The design achieves stable, uniform lighting across longer distances by integrating high-voltage and low-voltage lamps, preventing severe light attenuation and inconsistent brightness, and enabling series connections with other light strings.

Implementation Method 1

the light-transmitting film can reflect and refract light for a plurality of times during a propagation process of light, thereby achieving an effect of diffuse reflection

Methodology Applied
Scientific EffectReflection: Reflection

Implementation Method 2

the light-transmitting film can reflect and refract light for a plurality of times during a propagation process of light

Methodology Applied
Scientific EffectRefraction: Refraction

Implementation Method 3

a plurality of LED lamp beads are also connected in series on the main wire so as to form a low-voltage wire lamp

Methodology Applied
Scientific EffectLight-emitting diode effect: Light Emitting Diode

Data Source

PatentUS12398850B1LED-embedded light-emitting wire light string
Publication Date: 2025.08.26 SHENZHEN JIN CHANG DA NONFERROUS METALS CO LTD
  • US12398850B1 patent drawing
  • US12398850B1 patent drawing
  • US12398850B1 patent drawing

AI summary

An LED-embedded light-emitting wire light string is provided, including a plug, a tail socket, a main wire, tees, injection-molded lamp bases, light bulbs, and a rectifier drive board. Two ends of the main wire are respectively connected to the plug and the tail socket; branches are provided on the main wire, each branch is connected to one of the injection-molded lamp bases by way of the corresponding tee unit, the light bulbs are respectively installed on the injection-molded lamp bases, and the main wire also connects a plurality of light bulbs in series to form a high-voltage wire lamp; a plurality of LED beads are connected in series on the main wire so as to form a low-voltage wire lamp; the low-voltage wire lamp is connected to the plug or the tail socket; and the high-voltage wire lamp and the low-voltage wire lamp share a power supply.