LED Lighting Device Color Resolution via Cyclic Selection
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Solution Overview
Problem
Conventional LED lighting devices struggle to easily increase the number of adjustable colors and resolution of toning, leading to discomfort due to significant color temperature and brightness differences between mixed emission colors.
Innovation Solution
An LED lighting device with a selector circuit that cyclically selects LED loads and a control circuit generating intermediate colors through temporal combinations of first and second cycle periods, allowing for higher toning resolution and reduced discomfort during color transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LED lighting devices use sequential selection of LED loads with different emission colors, then the device can produce mixed emission colors, but the number of adjustable colors and resolution of toning are limited
Solution Approach 1:
The patent employs periodic action by sequentially selecting LED loads in cyclic frames. The control circuit repeatedly cycles through different LED load combinations within each frame, creating temporal multiplexing. This periodic selection enables the system to generate multiple distinct mixed emission colors by varying the sequence and duration of LED load activation across different frames, thereby increasing color adjustability without requiring additional physical LED components
Solution Approach 2:
The patent applies dynamics by making the LED load selection flexible and adjustable rather than fixed. The control circuit can dynamically modify the timing, duration, and sequence of LED load activation within each frame. This dynamic control allows the system to adaptively generate a wide range of mixed emission colors by adjusting the temporal pattern of selection, transforming the static LED configuration into a versatile color control mechanism
2Ease of operation
If conventional LED lighting devices switch between different mixed emission colors, then color adjustment is possible, but significant color temperature and brightness differences cause discomfort
Solution Approach 1:
The patent segments the color transition process by dividing it into multiple discrete frames, each containing a specific sequence of LED load selections. Within each frame, the system can independently control the timing and intensity of different LED loads. This segmentation allows the control circuit to create gradual, stepwise transitions between color temperatures and brightness levels by adjusting which LED loads are activated in each frame segment, thereby achieving smooth color transitions that reduce visual discomfort
Solution Approach 2:
The patent introduces intermediate mixed emission colors as mediators between extreme color temperatures and brightness levels. The control circuit generates intermediate frames that blend different LED load combinations to create transition states. These intermediate colors act as visual bridges, gradually transitioning the output from one color temperature to another without abrupt changes. This intermediary approach softens the visual impact of color switching and reduces discomfort by avoiding direct, harsh transitions between contrasting colors
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 solution enables increased color resolution and smoother transitions by generating intermediate colors between mixed emission colors, reducing discomfort and enhancing the ability to produce colors not achievable in a single cycle period.
Implementation Method 1
LED loads, each having a different emission color, to emit light
Data Source
AI summary
A light-emitting diode (LED) lighting device includes (i) a selector circuit that sequentially and cyclically selects a plurality of LED loads one by one, the plurality of LED loads respectively emitting light as a result of being selected, and (ii) a control circuit that controls the selector circuit to cause an intermediate color to be produced by successively generating frames, each frame being a temporal combination of at least one first cycle period and at least one second cycle period, the at least one first cycle period generating a first mixed emission color, and the at least one second cycle period generating a second mixed emission color different from the first mixed emission color.