Compact LED Fixture Uniform Diffusion via Dynamic Channel Mixing
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Solution Overview
Problem
Existing LED lighting technologies face challenges in emulating white light or sunlight effectively, particularly in achieving uniform diffusion and high Color Rendering Index (CRI), which is essential for replicating the visual aesthetics of incandescent lighting and maintaining color consistency across different batches and applications.
Innovation Solution
A two-channel or four-channel dynamic LED lighting system that includes red, green, blue, and white LED modules, controlled by a Dynamic Tuner Module (DTM) to produce specification-grade white light with a high CRI, allowing for smooth dimming effects and optimal color temperature adjustments, ensuring uniform diffusion and high color rendering capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens or optic is moved closer toward the LEDs and the space between each LED is minimized, then the size of the diffused linear LED lighting fixture is decreased, but pixelation occurs making the light non-uniform
Solution Approach 1:
The patent divides the lighting fixture into multiple independently controllable LED channels (typically 3-5 channels with different color temperatures and colors). By segmenting the control of each LED group, the system can dynamically adjust individual channel intensities to compensate for the reduced spacing, maintaining uniform overall illumination while minimizing fixture size.
Solution Approach 2:
The patent implements dynamic control of multiple LED channels with different color temperatures (e.g., warm white, cool white, colored LEDs). By dynamically adjusting the intensity ratios between channels, the system compensates for the pixelation effect caused by reduced LED spacing, achieving uniform light diffusion from a compact fixture.
2Adaptability or versatility
If additional colored LEDs are introduced, then color rendering capability is improved, but the pixel pitch increases exponentially
Solution Approach 1:
The patent combines multiple LED types (warm white LEDs, cool white LEDs, and colored LEDs) into a single integrated linear fixture. By merging these different LED types in close proximity with independent channel control, the system achieves high color rendering capability while maintaining a compact form factor, as the combined light output creates uniform illumination that masks individual LED spacing.
3Device complexity
If the fewest number of LEDs per increment is used, then device complexity is reduced, but the ability to represent the visible light spectrum with specific spectral values is compromised
Solution Approach 1:
The patent changes the control parameters by implementing independent intensity control for each LED channel. With only 3-5 independently controllable channels (compared to traditional approaches requiring many more LEDs), the system achieves precise spectral control by dynamically adjusting the intensity ratios between channels, thereby representing specific spectral values and color temperatures without requiring a large number of physical LEDs.
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 achieves high CRI of 95, enabling accurate color reproduction and uniform diffusion, reducing pixilation, and meeting the requirements for circadian rhythm lighting applications, while using fewer LEDs than traditional systems, thus fitting into smaller profiles and maintaining energy efficiency.
Implementation Method 1
light emitting diodes (LEDs)
Implementation Method 2
red, green, blue, and white emitting LED modules
Implementation Method 3
The lighting fixture may be dynamically controlled such that it produces specification grade, quality, white light
Data Source
AI summary
Systems, software, and methods are provided for efficient, dynamic lighting control. In an embodiment, a two-channel LED lighting system is dynamically controlled to emulate dimming of an incandescent fixture. In an example, a lighting fixture may include red, green, blue, and white emitting LED modules. The lighting fixture may be controlled such that it produces generally white light from about 2150K candle light color to 5500K daylight white color with only 4 LEDs. Furthermore, the white LED may be controlled such that the white LED CRI is approximately 95 to ensure optimal results when mixed with red and green. In another embodiment, a dynamic two-channel LED lighting system is controlled to emulate dimming of an incandescent fixture. Specific dimming protocol can allow for efficient dimming which helps minimize the height of a linear light fixture and maintain diffusion with multiple colored point sources at minimal pitch.