Lighting Module with Dual LED Positioning for Arc Lamp Replacement
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Solution Overview
Problem
Existing lighting solutions, such as those using LED-based lamp assemblies, fail to provide a direct replacement for conventional high brightness filament or arc lamps like high pressure sodium lamps without modifying the luminaire, as they do not efficiently mimic the light distribution and collimation characteristics of these lamps.
Innovation Solution
A lighting module comprising at least one first light source positioned on the longitudinal axis and a second light source positioned at a non-zero distance, both emitting light distributions that are substantially perpendicular to the longitudinal axis, allowing for efficient cooling and collimation, and combined to mimic the light of a conventional high brightness filament or arc lamp, with a carrier and heat spreading member for effective heat management and light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single LED light source is used, then the structure is simple and cooling is easier, but the light distribution cannot mimic conventional high brightness filament or arc lamps
Solution Approach 1:
The patent divides the light source into two separate LED modules: a first LED module positioned on the longitudinal axis emitting light toward the reflector, and a second LED module positioned off-axis emitting light away from the reflector. This segmentation allows each module to be optimized for its specific function while together they replicate the complex light distribution of conventional high brightness lamps.
2Illumination intensity
If the first LED is positioned in the optical center of the reflector, then light collimation is improved, but the second LED cannot be positioned for sufficient cooling
Solution Approach 1:
The patent applies different positioning strategies to different LED modules based on their specific functions. The first LED module is positioned on the longitudinal axis to optimize light collimation toward the reflector, while the second LED module is positioned off-axis to optimize cooling efficiency. Each module's position is locally optimized for its particular role in the overall system.
3Adaptability or versatility
If two LED light sources are used to mimic conventional lamps, then direct replacement capability is achieved, but heat management becomes more complex
Solution Approach 1:
The patent combines both LED modules onto a single base structure that integrates multiple cooling channels. The base includes a first cooling channel for the first LED module and a second cooling channel for the second LED module, allowing centralized heat management while maintaining the dual-light-source configuration necessary for direct replacement of conventional high brightness lamps.
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
Enables direct replacement of conventional high brightness lamps without modifying the luminaire, increasing illuminance and lumen output while maintaining collimated light transmission and effective cooling of the light sources.
Implementation Method 1
The first LED light source is positioned in the optical center of and directed towards a reflector and provides first light having a first light distribution. The reflector collects and redirects the first light having a first light distribution into reflected first light.
Implementation Method 2
The lighting module further comprises a carrier and heat spreading member for effective heat management
Data Source
AI summary
The invention provides a lighting module for use in a reflector which comprises at least one first light source emitting first light having a first light distribution with a first main direction and at least one second light source emitting second light having a second light distribution with a second main direction opposite to the first main direction. A base connects the lighting module to a luminaire socket. The base has a longitudinal axis extending from the base. The first light source is positioned on the longitudinal axis and the second light source is positioned at a non-zero distance to the longitudinal axis. The first main direction and the second main direction are substantially perpendicular with respect to the longitudinal axis.