LED Lighting Control System for Smooth Dimming Transitions
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Solution Overview
Problem
Current digital dimming systems for LED lighting cause noticeable and unpleasant transitions between discrete brightness levels, leading to uneven illumination.
Innovation Solution
A dynamic LED lighting control system that adjusts the lighting level by determining a delta value between the current and target levels, calculating a step time value, and gradually changing the illumination to smooth out transitions between brightness levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If digital dimming systems are used to control LED brightness levels, then the lighting control system can provide discrete brightness levels, but the transitions between levels appear as noticeable visual jumps that are unpleasant to the human eye
Solution Approach 1:
The patent segments the transition between brightness levels into multiple intermediate steps. Instead of jumping directly from one discrete level to another, the system divides the transition into smaller increments, making each individual step imperceptible to the human eye. This segmentation of the transition process eliminates the harmful visual jumps while maintaining the benefit of discrete brightness level control.
Solution Approach 2:
The patent applies dynamics by adjusting the rate of transition between brightness levels based on the current state. The system dynamically modifies the step size and timing of brightness transitions, using smaller steps when approaching target levels and larger steps when far from them. This dynamic adjustment ensures smooth, imperceptible transitions while maintaining efficient control response.
2Speed
If the lighting level is adjusted quickly to reach the target level, then the system responds rapidly to user inputs, but the transition appears uneven and noticeable to the human eye
Solution Approach 1:
The patent employs dynamic transition timing where the speed of brightness adjustment is continuously adapted during the transition process. The system starts with faster transitions when the difference between current and target levels is large, then progressively slows down as it approaches the target level. This dynamic speed adjustment maintains rapid overall response while ensuring the final approach is smooth and imperceptible.
Solution Approach 2:
The patent uses periodic action by implementing regular, timed steps in the brightness transition process. Instead of a continuous analog transition, the system applies discrete brightness adjustments at regular time intervals, with the magnitude of each step carefully controlled. This periodic application of brightness changes creates a rhythm that appears smooth to the human eye while maintaining precise digital control.
3Ease of manufacture
If discrete brightness levels are used in LED control, then the system can provide cost-effective illumination control, but the transitions between levels create unpleasant visual effects
Solution Approach 1:
The patent segments the brightness transition into multiple discrete steps that are computationally generated rather than requiring additional physical components. By dividing the transition into software-controlled segments, the system maintains the cost-effectiveness of digital LED control while eliminating the harmful visual effects of direct level jumps.
Solution Approach 2:
The patent introduces an intermediary processing layer between the control input and the LED output. This intermediary software module calculates intermediate brightness levels and timing, acting as a mediator that translates discrete control commands into smooth, multi-step transitions. This intermediary layer adds no physical cost but effectively eliminates the visual discontinuities.
Data Source
AI summary
Dynamic light emitting device (LED) lighting adjustment systems and related methods are disclosed. In one aspect, a method can receive, at an LED lighting fixture, a lighting adjustment signal corresponding to a target lighting level and determine a delta value that represents a difference between a current lighting level of the LED lighting fixture and the target lighting level and a step time value associated with the determined delta value. The method can further include adjusting the current lighting level of the LED lighting fixture to a new current lighting level for the duration of the step time value and repeating the determining and adjusting steps until the new current lighting level equals the target lighting level.


