Lighting Device With Controllable Spectral Characteristics
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Solution Overview
Problem
Existing lighting devices struggle to satisfactorily adjust spectral characteristics of white light, as the interdependence of different spectral characteristics makes it unclear how to describe and control them effectively.
Innovation Solution
A lighting device comprising multiple white light sources with distinct spectral characteristics, controlled by electronics to vary their proportional contributions within a defined spectral light parameter space, allowing for flexible adjustment of spectral properties such as color rendering, gamut, and color temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple white light sources with distinct spectral characteristics are combined, then the spectral characteristics of the white mixed light can be controlled and adjusted, but the device complexity increases
Solution Approach 1:
The lighting device is divided into multiple independent white light sources (S1, S2, S3), each with distinct spectral characteristics. This segmentation allows independent control of each light source's spectral contribution, enabling precise adjustment of the overall white mixed light spectrum without requiring complex integrated systems.
2Measurement precision
If proportional contributions of white light sources are adjusted to achieve desired spectral characteristics, then spectral precision is improved, but the ease of operation decreases
Solution Approach 1:
The control electronics dynamically adjust the proportional contributions of each white light source based on desired spectral targets. This dynamic control enables precise spectral adjustment while automating the complex coordination required, maintaining ease of operation through intelligent control algorithms that handle the mathematical optimization of spectral mixing.
3Manufacturing precision
If a target range is defined in spectral light parameter space, then manufacturing precision is improved, but the device complexity increases
Solution Approach 1:
The patent pre-defines target ranges for spectral characteristics in the spectral light parameter space before actual lighting operation. These target ranges establish acceptable spectral tolerances and performance criteria in advance, guiding the control system to achieve desired spectral outputs without requiring complex real-time adjustments during operation.
Data Source
AI summary
A lighting device for generating a white mixed light having controllable spectral characteristics is provided. The lighting device comprises a number of white light sources for each making a contribution to the white mixed light by generating a white light with a respective spectral expression in each case that can be quantitatively characterized, so that the white lights generated by the white light sources can form corner points of a target range for the resulting mixed light in a spectral light parameter space. The lighting device further comprises control electronics for controlling proportional contributions of the white light sources so that the position corresponding to the resulting mixed white light can be varied within the target area spanned on the corner points in the spectral light parameter space.