Lighting Device with Segmented Emitters and Remote Lumiphor
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Solution Overview
Problem
High-power lighting devices with multiple emitters face challenges in maintaining color consistency and luminous efficiency due to heat transfer issues between different emitter types, leading to reduced flux and limited control over color points at elevated temperatures.
Innovation Solution
The solution involves spatially segregating electrically activated emitters with different peak wavelengths using separate support elements and thermally insulating materials to reduce conductive heat transfer, allowing independent control of each emitter and incorporating remotely located lumiphors to manage heat and maintain color consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple emitters with different peak wavelengths are used in a single device, then color rendering and tunability are improved, but heat transfer between emitters causes luminous efficiency to decline and color consistency to deteriorate
Solution Approach 1:
The lighting device is divided into multiple independent emitter modules, each with its own heat management structure. This segmentation allows each emitter to be thermally isolated from others, preventing heat transfer that would reduce luminous efficiency, while still enabling combined color output for improved rendering and tunability.
Solution Approach 2:
Thermal barrier structures serve as intermediary elements between different emitters, blocking conductive heat transfer paths. These intermediaries maintain electrical and optical connectivity while preventing thermal coupling, thus preserving luminous efficiency of each emitter type.
2Adaptability or versatility
If multiple emitters with different peak wavelengths are used in a single device, then color rendering and tunability are improved, but heat transfer between emitters causes color consistency to deteriorate
Solution Approach 1:
The lighting device is divided into multiple independent emitter modules, each with its own heat management structure. This segmentation allows each emitter to be thermally isolated from others, preventing heat transfer that would reduce luminous efficiency, while still enabling combined color output for improved rendering and tunability.
Solution Approach 2:
Thermal barrier structures serve as intermediary elements between different emitters, blocking conductive heat transfer paths. These intermediaries maintain electrical and optical connectivity while preventing thermal coupling, thus preserving luminous efficiency of each emitter type.
3Productivity
If emitters are mounted close together to increase flux output, then productivity is improved, but heat transfer between emitters increases causing luminous efficiency to decline
Solution Approach 1:
The lighting device is divided into multiple independent emitter modules, each with its own heat management structure. This segmentation allows each emitter to be thermally isolated from others, preventing heat transfer that would reduce luminous efficiency, while still enabling combined color output for improved rendering and tunability.
4Productivity
If emitters are mounted close together to increase flux output, then productivity is improved, but device complexity increases due to heat management requirements
Solution Approach 1:
Multiple emitter modules with integrated heat management structures are combined into a single lighting device. Each module maintains its own thermal management, but they are optically integrated to work together, achieving high flux output while managing complexity through modular design.
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
This approach enhances the stability and longevity of lumiphors, enables higher flux output, and improves color rendering and tunability of the lighting device by reducing thermal communication between emitters and lumiphors, thus maintaining color consistency and efficiency across varying temperatures.
Implementation Method 1
lumiphors that absorb a portion of emissions having a first peak wavelength emitted by the emitter and re-emit the light having a second peak wavelength that differs from the first peak wavelength
Implementation Method 2
the second emitter support element is spatially segregated from, and/or is in insubstantial thermally conductive communication with, the first emitter support element
Data Source
AI summary
A lighting device including a plurality of electrically activated emitters having different peak wavelengths, at least one remote lumiphor arranged to receive at least some emissions from one of the emitters, and a primary electrically activated emitter spatially segregated and/or thermally insulated from a secondary electrically activated emitter. A lighting device including a plurality of electrically activated emitters spatially segregated from one another having different peak wavelengths, at least one lumiphor spatially segregated from one of the emitters, and a control device independently connected to each emitter or group of emitters. A method of producing a lighting device including a plurality of independently controllable electrically activated emitters.