LED Light String Diagnostic Probe with Polarity Control
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Solution Overview
Problem
Decorative LED light strings pose challenges in identifying and repairing defective LEDs, as the failure of one LED can cause the entire string to malfunction, making it difficult and time-consuming to locate and replace the faulty unit, especially in complex installations like Christmas trees or yard decorations where removing the lights can damage ornaments or wire frames.
Innovation Solution
A diagnostic device comprising a probe and a polarity selector switch that penetrates the insulation layer of the LED light string to contact the conductor and control the polarity of an electrical waveform, allowing for efficient identification of defective LEDs by providing positive and negative electrical waveforms to pinpoint the faulty section, and a repair device that includes a resistor or replacement LED to maintain current levels and restore functionality without removing the defective LED.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LEDs are connected in series to reduce electricity consumption and heat generation, then energy efficiency is improved, but the failure of one LED causes the entire string to malfunction
Solution Approach 1:
The diagnostic device segments the continuous light string into testable sections by using a probe to apply voltage at specific points along the conductor. This allows identification of which segment contains the defective LED without requiring the entire string to fail together, thereby maintaining system reliability while preserving the energy-efficient series connection architecture.
2Measurement precision
If many LEDs are checked to find the defective LED, then identification accuracy is improved, but time consumption increases significantly
Solution Approach 1:
The diagnostic device performs preliminary action by applying voltage through the probe at strategic points along the conductor before systematically checking each LED. The polarity selector switch pre-configures the testing sequence, allowing the user to quickly identify the defective LED's location without methodically checking every single LED in the string, thus reducing time loss while maintaining identification precision.
Solution Approach 2:
The probe serves as an intermediary tool between the power source and the conductor, enabling voltage application at specific points without direct connection to each LED. This intermediary mechanism allows efficient location of the defective LED by testing conductor continuity and voltage presence, significantly reducing the time required compared to checking each LED individually.
3Ease of repair
If the light string is removed from decorations to replace the defective LED, then repair accessibility is improved, but damage to ornaments or wire frames occurs
Solution Approach 1:
The patent replaces the mechanical approach of physically removing and replacing LEDs with an electrical diagnostic and repair system. The probe applies voltage electrically through the insulation layer to identify and repair defective LEDs in situ, eliminating the need to mechanically remove the light string from decorations and thereby preventing damage to ornaments or wire frames while maintaining ease of repair.
4Reliability
If the probe penetrates the insulation layer to contact the conductor, then electrical contact is improved, but risk of insulation damage increases
Solution Approach 1:
The diagnostic device changes the parameter of probe tip geometry to a rounded shape, which distributes the mechanical stress during insulation penetration over a larger area rather than concentrating it at a sharp point. This parameter change allows the probe to penetrate the insulation layer sufficiently to make reliable electrical contact with the conductor while minimizing the risk of causing damage to the insulation layer.
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 solution enables rapid and precise identification and repair of defective LEDs in LED light strings, reducing the need for complete string replacement and minimizing damage to decorations, while maintaining the longevity of remaining LEDs by managing current flow effectively.
Implementation Method 1
The probe is configured to penetrate the insulation layer and contact the conductor of an LED light string
Implementation Method 2
The polarity selector switch is electrically coupled to the probe and configured to control the polarity of an electrical waveform provided to the probe
Data Source
AI summary
According to one embodiment, a diagnostic device (8) for identifying a defect in an LED light string includes a probe (18) and a polarity selector switch (16). The LED light string includes a conductor provided within an insulation layer. The probe (18) is configured to penetrate the insulation layer and contact the conductor of an LED light string. The polarity selector switch (16) is electrically coupled to the probe (18) and configured to control the polarity of an electrical waveform provided to the probe (18).