Dynamic Dim-to-Warm LED Fixture Control
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Solution Overview
Problem
LED lighting systems face challenges in maintaining user-preferred correlated color temperature (CCT) levels when dimmed, as existing technologies do not effectively allow for customizable CCT adjustments at different power levels, leading to inconsistent lighting experiences.
Innovation Solution
A lighting fixture with multiple LEDs emitting different colors, controlled by a microcontroller that switches between tunable color mode and dim-to-warm mode based on user inputs, allowing for customizable CCT and brightness settings through a user interface, enabling precise control of light output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED lighting power is reduced to dimmed levels, then energy consumption decreases, but the correlated color temperature becomes inconsistent with user preferences
Solution Approach 1:
The system dynamically adjusts the ratio of power distributed to high CCT and low CCT LED elements based on the operating power level. At full power, the system maintains a default CCT ratio, while at dimmed levels, it transitions to a different ratio that preserves user-preferred color temperature. This dynamic adaptation allows the lighting system to maintain visual consistency across varying energy consumption states.
2Adaptability or versatility
If the ratio of power to high CCT and low CCT elements is fixed, then device complexity is reduced, but adaptability to different user preferences at different power levels is limited
Solution Approach 1:
The system pre-configures multiple CCT ratio profiles corresponding to different power levels (e.g., full power, half power, dimmed). When operation begins, the controller automatically selects the appropriate profile based on the detected power level, eliminating the need for real-time complex calculations. This preliminary setup approach enables adaptability while keeping the control system relatively simple.
Solution Approach 2:
The system changes the operational parameters (power distribution ratios) of the LED elements based on the operating state. By adjusting the electrical parameters supplied to high CCT and low CCT elements differently at various power levels, the system achieves variable CCT output without requiring physically different LED components, thus maintaining simplicity while gaining adaptability.
3Adaptability or versatility
If multiple LEDs of different colors are used, then color tuning capability is improved, but device complexity increases
Solution Approach 1:
The lighting fixture is segmented into distinct LED modules, each containing LEDs of specific color temperatures (e.g., high CCT white LEDs and low CCT white LEDs). This segmentation allows independent control of each module's power distribution, enabling precise CCT tuning. By dividing the system into manageable segments rather than using a single complex multi-color LED array, the patent achieves color tuning capability while keeping individual module structures relatively simple and modular.
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 users to select desired CCT and brightness levels, providing consistent and customizable lighting experiences across various power levels, enhancing user satisfaction and flexibility.
Implementation Method 1
The fixture may include a first light-emitting diode ("LED") configured to emit light of a first color. The fixture may include a second LED configured to emit light of a second color.
Data Source
AI summary
Apparatus, methods and systems for lighting may be provided. Apparatus may include a fixture. The fixture may include a first light-emitting diode (“LED”). The first LED may emit light of a first color. The fixture may include a second LED. The second LED may emit light of a second color. The apparatus may include a light driver circuit. The light driver circuit may operate the fixture in a tunable color mode. The light driver circuit may operate the fixture in a dim-to-warm mode. The light driver circuit may switch between the tunable color mode and the dim-to-warm mode. The light driver circuit may switch between the tunable color mode and the dim-to-warm mode in response to a signal corresponding to a user mode-selection.