Lighting Device With Segmented Surge Protection Circuits
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Solution Overview
Problem
Existing lighting devices using AC LEDs are limited by the need for surge protection devices with fixed threshold voltages, restricting their application across different voltage environments.
Innovation Solution
A lighting device with multiple input voltages is designed, featuring driving circuits with adjustable surge protection devices and rectifiers to accommodate various AC input voltages, allowing the same device to operate effectively across different voltage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a surge protection device with a fixed threshold voltage is used, then the device can provide effective surge protection for a specific AC input voltage, but the lighting device cannot be applied across different voltage environments
Solution Approach 1:
The lighting device is divided into multiple driving circuits, each equipped with a surge protection device having a different threshold voltage. This segmentation allows each circuit to handle specific voltage ranges, resolving the contradiction between providing effective surge protection for a specific voltage and adapting to different voltage environments.
Solution Approach 2:
The lighting device is designed with multi-functionality to operate across different AC input voltages (e.g., 120V, 277V, 480V). By incorporating multiple driving circuits with different surge protection thresholds, the device achieves universal applicability while maintaining reliable surge protection for each specific voltage environment.
2Reliability
If the threshold voltage of the surge protection device is determined based on a single AC input voltage, then surge protection is effective for that voltage, but the lighting device is limited in where it can be applied
Solution Approach 1:
The threshold voltage parameter of the surge protection devices is changed across different driving circuits. Each circuit uses a surge protection device with a threshold voltage matched to its specific AC input voltage range, enabling the lighting device to be manufactured for multiple voltage environments while maintaining effective surge protection in each.
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 a single lighting device to be widely used in diverse voltage environments, enhancing its utilization rate and providing effective surge protection across different AC input voltages.
Implementation Method 1
The rectifier is electrically connected with the surge protection device, and rectifies the AC input voltage through the surge protection device into the working voltage for use by the light-emitting unit
Data Source
AI summary
A lighting device for multiple input voltages is provided. The lighting device for multiple input voltages includes a plurality of driving circuits each being electrically connected with the light-emitting unit. Each of the driving circuits receives an AC input voltage, and converts the AC input voltage into a working voltage for use by the light-emitting unit. Each of the driving circuits includes a surge protection device and a rectifier. The surge protection device inputs the AC input voltage. The rectifier is electrically connected with the surge protection device, and rectifies the AC input voltage into the working voltage through the surge protection device for use by the light-emitting unit. A threshold voltage of each of the surge protection devices to prevent a surge is different from each other, so that the AC input voltage received by the driving circuits are different from each other.