LED Light Fixture Controller Adaptive Slew Time
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Solution Overview
Problem
Conventional light fixtures using LEDs experience choppy and erratic transitions between color outputs due to rapid state changes, which can be unsettling when control inputs change quickly.
Innovation Solution
A controller system that adjusts the slew time parameter based on the difference in input data to control the transition time of LED light fixtures, ensuring smooth output changes by inversely relating the slew time to the change in input data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If LEDs are used to provide rapid color switching capability, then the response speed is improved, but the color transitions become choppy and erratic
Solution Approach 1:
The patent applies dynamics by making the slew time parameter adjustable and adaptive rather than fixed. The controller dynamically modifies the slew time based on the magnitude of color changes detected in the input data stream, allowing the system to optimize between rapid response and smooth transitions in real-time conditions.
Solution Approach 2:
The patent changes the parameter of transition time (slew time) to resolve the contradiction. By inversely relating slew time to the amount of color change detected, the system adjusts the transition duration parameter dynamically - using longer slew times for small color changes to ensure smoothness, and shorter slew times for large color changes to maintain responsiveness.
2Stability of the object's composition
If the slew time is increased to smooth color transitions, then the color change smoothness is improved, but the response time increases
Solution Approach 1:
The system dynamically adjusts the slew time parameter based on real-time analysis of input data changes, rather than using a static value. This allows the system to optimize the balance between smoothness and response time adaptively, applying longer transitions only when necessary for small color adjustments.
Solution Approach 2:
The patent changes the slew time parameter inversely based on the detected amount of color change. When small color changes are detected, a longer slew time is applied to ensure smoothness; when large color changes are detected, a shorter slew time is applied to maintain fast response, thus optimizing both parameters under different conditions.
3Loss of time
If the slew time is decreased to improve response time, then the response speed is improved, but the color transitions become more abrupt
Solution Approach 1:
The patent applies parameter changes by inversely relating the slew time to the magnitude of color change detected in the input data. This creates an adaptive system where the transition smoothness parameter is automatically adjusted based on the operational context, resolving the contradiction between speed and smoothness.
4Stability of the object's composition
If conventional light sources are used to achieve slower transitions, then the color transition smoothness is improved, but the response speed decreases
Solution Approach 1:
The patent replaces the physical/chemical limitation of conventional light sources with an electronic control mechanism. Instead of relying on the inherent slow response of incandescent filaments, the system uses LED technology combined with a software-based slew time parameter to achieve smooth transitions while maintaining fast response capability.
Solution Approach 2:
The system uses dynamic parameter adjustment (slew time) to replicate the smooth transition characteristic of conventional sources while retaining the speed advantage of LEDs. The controller adaptively modifies the transition duration based on operational conditions, achieving both smoothness and speed that neither conventional sources nor fixed-parameter LED systems can provide alone.
Data Source
AI summary
Systems and methods of controlling the output of a light fixture. The light fixture includes a plurality of light sources and a controller. The controller is configured to receive a first input control value for a first control parameter and a first input control value for a second control parameter. The controller is also configured to determine a first difference between the first input control value for the first control parameter and a second input control value for the first control parameter stored in a memory and determine a second difference between the first input control value for the second control parameter and a second input control value for the second control parameter stored in the memory. The controller is also configured to set a slew time based on the first determined difference when the first determined difference is greater than the second determined difference and based on the second determined difference when the second determined difference is greater than the first determined difference.