Controllable Lighting Device for Wide Color Temperature and Intensity Control
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Solution Overview
Problem
Existing lighting technologies struggle to efficiently control the color temperature and intensity of LED lighting devices across a wide range of color temperatures, particularly in tunable illumination systems, often leading to inefficiencies and limitations in achieving desired lighting effects.
Innovation Solution
A lighting device comprising multiple emitter circuits configured to emit light at different color temperatures along a black body locus, controlled by a control circuit that adjusts power delivery to these circuits to achieve precise color and intensity adjustments, using feedback circuits to manage drive currents and prevent simultaneous activation of circuits sharing a feedback loop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple emitter circuits are used to achieve wide color temperature range, then color temperature adaptability is improved, but device complexity increases
Solution Approach 1:
The patent divides the emitter array into multiple independently controllable emitter circuits, each capable of emitting at different color temperatures. This segmentation allows the system to achieve a wide overall color temperature range by selectively activating different circuits or combinations of circuits, while managing complexity through modular control architecture.
Solution Approach 2:
The control circuit dynamically adjusts the operating parameters of multiple emitter circuits based on feedback from color temperature sensors and desired target values. This dynamic control enables seamless transitions between different color temperatures and efficient management of multiple emitter circuits through real-time parameter optimization.
2Use of energy by moving object
If feedback circuits are used to prevent simultaneous activation, then power consumption is reduced, but control complexity increases
Solution Approach 1:
The patent implements feedback circuits that monitor the activation state of emitter circuits and provide signals to the control circuit. This feedback mechanism prevents simultaneous activation of emitter circuits that would result in excessive power consumption or color rendering issues, while the control circuit uses this information to make intelligent activation decisions that optimize power efficiency.
3Manufacturing precision
If precise power delivery control is implemented, then color rendering precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent precisely controls the output characteristics of each emitter circuit by adjusting electrical parameters such as current magnitude and pulse width modulation duty cycle. This parameter control enables accurate color rendering and seamless color temperature transitions, while the standardized control architecture minimizes manufacturing complexity through programmable solutions rather than custom hardware for each emitter.
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 seamless control of color temperature and intensity across a broad spectrum, enhancing lighting flexibility and efficiency by preventing simultaneous activation of emitter circuits, thus maintaining precise color rendering and reducing power consumption.
Implementation Method 1
Lamps and displays using efficient light sources, such as light-emitting diodes (LED) light sources
Implementation Method 2
LED light sources may have a lower power consumption and a longer lifetime than traditional light sources
Data Source
AI summary
A lighting device may include a light source, a plurality of drive circuits, and a control circuit. The light source may include a plurality of emitter circuits that are configured to emit light. The light source may include a first emitter circuit that is configured to emit light at a first color (e.g., color temperature), a second emitter circuit is configured to emit light at a second color (e.g., color temperature), and a third emitter circuit is configured to emit light at a third color (e.g., color temperature). The first, second, and third colors (e.g., color temperatures) may be on a color curve, such as a color temperature curve like the black body locus. The control circuit may be configured to control the amount of power delivered to no more than two emitter circuits to emit light when controlling the light emitted by the light source to the target intensity.