High-Voltage Non-Isolated LED Lamp Ghost Light Elimination
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Solution Overview
Problem
High-voltage non-isolated LED lamps exhibit a 'ghost flame' phenomenon due to residual voltage to the ground when turned off, affecting their usage and energy efficiency.
Innovation Solution
A low-light elimination device comprising a voltage conversion module, a dimming control module, and a low-light elimination module with a relay unit and high back-voltage diode, which disconnects the LED lamp from the power supply when controlled to turn off, ensuring zero voltage to the LED chip and preventing light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If high-voltage non-isolated LED lamps use main power without disconnection in standby mode, then the lamps can be switched on and off regularly according to internal program design, but residual voltage to ground causes faint phenomenon (ghost flame) that affects use effect
Solution Approach 1:
The patent extracts and removes the harmful residual voltage from the system by introducing a relay unit that disconnects the LED lamp from the power supply in standby mode. This separation isolates the harmful voltage component while preserving the beneficial standby switching capability through software control.
Solution Approach 2:
The relay unit acts as an intermediary component between the power supply and LED lamp. It mediates the connection state based on control signals, completely disconnecting the circuit in standby mode to eliminate residual voltage while maintaining the ability to switch on and off regularly through the control module.
2Use of energy by moving object
If high-voltage non-isolated LED lamps are driven with main power connected, then energy efficiency is improved, but residual voltage causes trace light emission after shutdown that reduces energy efficiency
Solution Approach 1:
The patent extracts the harmful residual voltage component by using the relay unit to completely disconnect the LED lamp from the power supply in standby mode. This removes the source of energy waste from ghost flame while preserving energy efficiency during active operation when the relay is closed.
Solution Approach 2:
The relay unit performs periodic connection and disconnection actions based on the operational state. It closes the circuit during active operation to maintain energy efficiency and opens the circuit in standby mode to eliminate energy waste, creating a periodic action that optimizes overall energy performance.
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
Effectively eliminates the 'ghost flame' phenomenon, ensuring the LED lamp shuts down completely and enhancing energy efficiency and user experience.
Implementation Method 1
the voltage conversion module 1 is connected to the dimming control module 2 and is used to convert high-voltage alternating current into direct current for power supply
Implementation Method 2
the low light elimination module 3 includes a relay unit 31, which is connected between the positive electrode of the LED lamp and the voltage conversion module 1. When the dimming control module 2 controls the LED lamp to turn off, it also controls the relay unit 31 to disconnect
Implementation Method 3
the low light elimination module 3 further includes: a high back-voltage diode D2, connected between the cathode of the LED lamp and the voltage conversion module 1
Data Source
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AI summary
The invention discloses a high-voltage non-isolated LED lamp low light elimination device and an LED lamp. The high-voltage non-isolated LED lamp low light elimination device includes: a voltage conversion module , a dimming control module and a low light elimination module , wherein the voltage conversion module and The dimming control module is connected to convert high-voltage alternating current into direct current for power supply; the dimming control module is used to receive external control signals to control the on and off of the LED lamp; the low light elimination module , including a relay unit, is connected to the LED lamp between the positive electrode and the voltage conversion module , when the dimming control module controls the LED lamp to turn off, it also controls the relay unit to disconnect. The voltage to ground on the lamp board is close to zero, and the LED chip will not emit light. This solves the problem of high -voltage LED lamps "ghost light" phenomenon when turning off the lights and is low cost and effective .