Dual-LED Lighting Assembly for Warm-Dim Color Temperature Control
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Solution Overview
Problem
Dimming LED lights does not produce the same warming effect as dimming halogen or incandescent bulbs, as it does not affect the color temperature.
Innovation Solution
A lighting assembly with two light sources, a cold LED and a warm LED, connected in parallel, regulated by integrated circuits and a switch to adjust current and brightness, mimicking the color temperature change of halogen or incandescent bulbs during dimming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If LED is dimmed by an external dimmer, then the brightness is reduced, but the color temperature remains unchanged
Solution Approach 1:
The patent segments the lighting system into multiple independent LED light sources with different color temperatures (e.g., first LED for cool white, second LED for warm white). Each LED is controlled separately by individual drivers, allowing independent adjustment of brightness and color temperature to achieve the desired warming effect during dimming.
Solution Approach 2:
The patent implements dynamic control where the ratio of current supplied to different LED sources changes based on the dimming level. As the overall brightness decreases, the system dynamically shifts the proportion of warm-white LEDs relative to cool-white LEDs, creating a dynamic color temperature adjustment that mimics traditional incandescent dimming behavior.
2Temperature
If halogen or incandescent bulb is dimmed, then the brightness is reduced and color temperature becomes warmer, but LED cannot achieve the same effect
Solution Approach 1:
The patent merges multiple LED light sources with different color characteristics into a single lighting assembly. By combining cool-white and warm-white LEDs in one fixture with unified control circuitry, the system replicates the continuous color temperature transition of incandescent bulbs while maintaining LED energy efficiency and longevity.
Solution Approach 2:
The patent creates a universal lighting solution that can replace both incandescent/halogen bulbs and standard LEDs. The multi-functional LED assembly can operate in different modes (constant color temperature, dynamic warming on dim, various color temperatures) to serve multiple application requirements from a single device.
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
Achieves a dimming effect that mimics the warming effect of halogen or incandescent bulbs by adjusting the color temperature of combined LED light output.
Implementation Method 1
a first light source connected with an output of the power supply, and a second light source connected with the output of the power
Implementation Method 2
produce various wavelengths of light via two or more light sources
Data Source
AI summary
A circuit for a lighting assembly includes a power supply, a first light source connected with an output of the power supply, and a second light source connected with the output of the power. The first and second light sources are connected with the output of the power supply in parallel. At least one integrated chip including a driver is configured to regulate the current to each of the first light source and the second light source. A switch is configured to select a brightness level of each of the first and second light sources configured to appear similar to the characteristics of a halogen or incandescent light source.