Delayed Lighting Circuit with Energy Storage for Power Failure Safety
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Solution Overview
Problem
LED lighting devices lack a delayed lighting capability, resulting in immediate shutdown when power is disconnected, which can pose safety risks when users move in the dark.
Innovation Solution
A delayed lighting system comprising a light emitting circuit, a main power supply circuit, an energy storage circuit, and a control circuit that stores energy during power supply and controls the energy storage circuit to power a delayed lighting circuit when the main power supply is off, allowing continued lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the LED lighting device is designed to be simple and energy-efficient, then it achieves long lifetime and low energy consumption, but it lacks delayed lighting capability when power is disconnected
Solution Approach 1:
The energy storage circuit pre-stores electrical energy during the main power supply operation, preparing energy in advance for delayed lighting. When power is disconnected, this pre-stored energy immediately activates the delayed lighting circuit, providing the required delayed lighting capability without adding complex real-time control mechanisms.
Solution Approach 2:
The energy storage circuit acts as an intermediary between the main power supply and the LED lighting device. It receives and stores energy from the mains electricity during normal operation, then releases this stored energy to power the delayed lighting circuit when the main power is disconnected, enabling the transition from simple to complex functionality through a mediating energy storage component.
2Duration of action of moving object
If the LED lighting device uses standard power supply circuitry, then it maintains simplicity and cost-effectiveness, but it cannot provide continued lighting after power disconnection
Solution Approach 1:
The energy storage circuit performs preliminary energy accumulation during the main power supply phase, storing electrical energy from the mains electricity before power disconnection occurs. This pre-stored energy enables the delayed lighting circuit to operate for an extended duration after power off, directly addressing the lighting duration requirement without requiring continuous external power.
3Object-affected harmful factors
If the lighting system is designed for immediate shutdown when power is cut, then it achieves simple control and energy conservation, but it creates safety hazards when users move in the dark
Solution Approach 1:
The energy storage circuit pre-accumulates energy during normal operation, and the control circuit is pre-configured to automatically activate the delayed lighting circuit upon power disconnection. This preliminary preparation ensures that lighting continues immediately when power is cut, eliminating safety hazards from sudden darkness without requiring complex real-time decision-making or user intervention.
Solution Approach 2:
The control circuit automatically detects power disconnection and activates the delayed lighting circuit without user intervention. The system serves itself by monitoring its own power state and autonomously switching to delayed lighting mode, reducing control complexity while ensuring safety functionality is always activated when needed.
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 system enables continued lighting after the main power supply is turned off, enhancing safety by preventing darkness and improving user experience.
Implementation Method 1
an energy storage circuit configured to store electrical energy from a mains electricity when the main power supply circuit supplies power to the light emitting circuit
Implementation Method 2
a delayed lighting circuit configured to emit light when the main power supply circuit stops supplying power to the light emitting circuit
Data Source
AI summary
A delayed lighting system includes a light emitting circuit; a main power supply circuit connected to the light emitting circuit; a delayed lighting circuit; an energy storage circuit configured to store electrical energy from a mains electricity when the main power supply circuit supplies power to the light emitting circuit; and a control circuit connected to the energy storage circuit, the light emitting circuit, and the delayed lighting circuit respectively. When the main power supply circuit stops supplying power to the light emitting circuit, the control circuit is configured to control the energy storage circuit to supply power to the delayed lighting circuit and the delayed lighting circuit is configured to emit light.