Multi-LED Lighting Apparatus Chroma Control
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Solution Overview
Problem
Current lighting systems lack flexibility and efficiency in adjusting light color temperature and luminous flux to achieve desired chroma coordinates within a predetermined range, which limits their ability to mimic natural white light effectively.
Innovation Solution
A lighting apparatus comprising multiple LED modules with different color temperatures, a driver, and a controller that calculates and adjusts power ratios to mix lights within a specific chroma range, including a Planckian locus, to achieve target color temperatures and luminous flux percentages, allowing for precise control of color rendering index and chroma coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple LED modules with different color temperatures are used to adjust chroma coordinates, then color rendering flexibility is improved, but device complexity increases
Solution Approach 1:
The lighting system is divided into multiple independent LED modules, each emitting light at a different color temperature (first LED module: first color temperature, second LED module: second color temperature, third LED module: third color temperature). This segmentation allows independent control of each module's luminous flux to achieve precise chroma coordinate adjustment within the Planckian locus, resolving the contradiction by making the system adaptable while maintaining manageable complexity through modular design.
Solution Approach 2:
The system dynamically adjusts the power ratios supplied to each LED module based on target chroma coordinates. The controller calculates appropriate power ratios in real-time to mix lights from different color temperatures, enabling the system to adapt to various color rendering requirements while maintaining a fixed modular structure, thus improving versatility without permanently increasing device complexity.
2Measurement precision
If power ratios are calculated and adjusted to mix lights within specific chroma range, then chroma coordinate precision is improved, but control complexity increases
Solution Approach 1:
The controller receives target chroma coordinates as input and calculates the appropriate power ratios for each LED module to achieve those coordinates. This feedback mechanism allows the system to continuously adjust the mixing of lights from different color temperatures, ensuring precise chroma coordinate control while automating the complex calculation process, thereby improving precision without requiring manual intervention for the complex control logic.
Solution Approach 2:
The system changes the power ratio parameters supplied to each LED module based on the target chroma coordinates. By adjusting these electrical parameters dynamically, the controller achieves precise control over the mixed light's chroma coordinates, transforming a complex optical control problem into a simpler electrical parameter adjustment task, thus improving precision while managing control complexity.
3Use of energy by moving object
If LED modules are used for illumination, then energy efficiency is improved, but color temperature adjustment flexibility deteriorates
Solution Approach 1:
Instead of using a single LED module with fixed color temperature, the system segments the illumination source into multiple LED modules, each with a different color temperature. This segmentation maintains LED energy efficiency while enabling flexible color temperature adjustment by selectively controlling the luminous flux from each module, thus resolving the contradiction between energy efficiency and adjustment flexibility.
Solution Approach 2:
The LED-based lighting system is designed to perform multiple functions: it can provide illumination at different color temperatures (first, second, and third color temperatures) while maintaining LED energy efficiency. By making the system multi-functional through the use of multiple LED modules with controllable power ratios, it achieves both energy efficiency and color temperature flexibility simultaneously.
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 system enables flexible and efficient adjustment of light color temperature and luminous flux, ensuring chroma coordinates are within a predetermined threshold, closely mimicking natural white light and meeting user requirements for color consistency and illumination quality.
Implementation Method 1
a first LED module 501, a second LED module 502 and a third LED module 503, a driver 504 and a controller 505. The first LED module 501 emits a first light of a first color temperature. The second LED module 502 emits a second light of a second color temperature. The third LED module 503 emits a third light of a third color temperature.
Data Source
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AI summary
The lighting apparatus includes a first LED module (501), a second LED module (502) and a third LED module (503). The first LED module (501) emits a first light of a first color temperature. The second LED module (502) emits a second light of a second color temperature. The third LED module (503) emits a third light of a third color temperature. A driver (504) is used for generating a first driving power, a second driving power and a third driving power respectively supplying to the first LED module (501), the second LED module (502) and the third LED module (503). A controller (505) is for determining a power ratio corresponding to a mixed light with a target color temperature mixed by the first light, the second light and the third light. The mixed lights of different target color temperatures have chroma coordinates within a predetermined chroma range.