Low EMI Lighting Device with Variable Output Levels
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Solution Overview
Problem
Existing low-EMI lighting devices often fail to meet high light output requirements, necessitating additional devices to supplement their limited output, which can be inefficient and increase electromagnetic interference.
Innovation Solution
A low-EMI lighting device with a high-voltage linear constant current LED driver and a switching device that can be alternately deployed between positions to adjust LED output levels from 250 to 10,000 lumens, maintaining low EMI levels of up to 30 dBμV/m across varying output levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If low-EMI lighting devices are used, then electromagnetic interference is reduced, but light output level is insufficient
Solution Approach 1:
The patent implements a switching device that can alternately deploy between first and second positions to dynamically adjust the LED output level. This dynamic configuration allows the system to switch between different output levels (250 to 10,000 lumens) while maintaining low-EMI characteristics, resolving the contradiction between fixed low output and high output requirements
Solution Approach 2:
The patent changes the operational parameters of the LED driver by introducing a switching device that modifies the electrical connection configuration. This parameter change enables the LED output level to vary between 250 and 10,000 lumens while the LED driver maintains its high-voltage linear constant current regulation to keep EMI levels low
2Illumination intensity
If additional lighting devices are brought in to supplement low-EMI devices, then light output level is increased, but device complexity and EMI increase
Solution Approach 1:
The patent makes the LED driver multi-functional by enabling it to operate at multiple output levels through the switching device. The single LED driver can now serve both low-output and high-output requirements by switching between configurations, eliminating the need for separate lighting devices for different illumination levels
Solution Approach 2:
The patent combines multiple functional capabilities into a single lighting device. By integrating the switching device with the LED driver, the system merges the functions of multiple potential lighting devices into one unit that can adjust its output level as needed, reducing overall system complexity
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 allows for variable lighting output levels while maintaining low electromagnetic interference, making it suitable for applications needing higher light output without the need for additional devices, thus optimizing light output and reducing EMI.
Implementation Method 1
a light-emitting diode (LED) driver including a high-voltage linear constant current regulator
Implementation Method 2
an LED module including at least one LED electrically connected to the LED driver
Data Source
AI summary
The invention relates generally to lighting devices and, more particularly, to low electromagnetic interference (EMI) lighting devices with variable light output levels.