Universal LED Tube Lamp with Degenerate Voltage Sensing
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Solution Overview
Problem
Linear LED tube lamps face safety concerns due to potential electric shock and fire hazards during installation, as they often fail safety tests for leakage current and are not compatible with existing fluorescent tube fixtures, leading to operational uncertainties and hazards.
Innovation Solution
A universal linear LED tube lamp with a degenerate voltage sensing and control mechanism and double shock protection switches that can detect and manage power source configurations, ensuring safe operation in both single-ended and double-ended fixtures by blocking electric current flow to exposed bi-pins, thus eliminating shock and fire risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional LED tube lamps are used in existing fluorescent tube fixtures, then energy efficiency and environmental benefits are improved, but safety hazards (electric shock and fire risks) increase due to leakage current failures
Solution Approach 1:
A voltage sensing and control mechanism is introduced as an intermediary component between the power source and the LED driver. This mechanism senses the voltage configuration (single-ended or double-ended wiring) and controls the power delivery accordingly, preventing harmful leakage currents while maintaining energy efficiency benefits
Solution Approach 2:
The LED tube lamp is designed with universal compatibility to work in both single-ended and double-ended fluorescent tube fixtures. The voltage sensing mechanism detects the wiring configuration and adapts its operation, providing safe operation across different installation scenarios without requiring separate designs
2Ease of operation
If LED tube lamps are designed for compatibility with existing fluorescent tube fixtures, then ease of installation is improved, but operational reliability decreases due to uncertainty in single-ended vs double-ended wiring configurations
Solution Approach 1:
The LED driver system dynamically adapts its operation based on the detected voltage configuration. The voltage sensing mechanism identifies whether the fixture is single-ended or double-ended wired, and the control mechanism adjusts power delivery accordingly, ensuring reliable operation regardless of wiring configuration
Solution Approach 2:
A feedback mechanism is implemented where the voltage sensing and control system continuously monitors the power source configuration and adjusts its operation in real-time. This feedback loop ensures the LED driver operates correctly whether in single-ended or double-ended wiring, eliminating operational uncertainty
3Object-affected harmful factors
If protection mechanisms are added to eliminate shock hazards, then safety is improved, but device complexity increases
Solution Approach 1:
The voltage sensing and control mechanism is merged with the existing LED driver circuitry rather than being a separate protection system. This integration provides safety functionality while minimizing additional complexity, as the sensing and control functions are combined with the power management already required for LED operation
Data Source
AI summary
A linear light-emitting diode (LED)-based solid-state universal lamp using a degenerate voltage sensing and control mechanism operates normally in both single-ended and double-ended linear tube lamp fixtures. The degenerate voltage sensing and control mechanism automatically detects power source configuration in the fixture and makes proper management so that the universal lamp works in any fixtures without operational uncertainty or risk of fire. When used with shock protection switches in the two lamp bases at two opposite ends, the universal lamp fully protects a person from possible electric shock during initial installation and re-lamping.