Linear Walk Arrangement for Smooth LED Color Transitions
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Solution Overview
Problem
Existing solutions for dimming and color changing in LED lamps often result in abrupt or unaesthetic transitions, leading to high processing loads and unsatisfactory visual experiences.
Innovation Solution
A linear walk arrangement is employed to smoothly vary the intensity or color of LED lamps by using a modified clock signal to increment or decrement control signals from an initial to a target value, ensuring simultaneous transitions across multiple channels, with the aid of pseudo-fractional dividers to modify the clock signal frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If software routines are used to provide smooth color transitions, then the aesthetic quality of transitions is improved, but the processing load increases undesirably
Solution Approach 1:
The patent replaces complex software-based color transition control with a hardware circuit implementation. The circuit uses parallel adders, counters, and control logic to directly generate the necessary control signals for smooth RGB transitions, eliminating the need for complex software routines and thereby reducing processing load while maintaining transition smoothness
Solution Approach 2:
The patent introduces intermediate control signals and control words that mediate between the desired color transitions and the actual LED driver inputs. These intermediate control mechanisms allow for precise, smooth transitions through hardware logic rather than requiring heavy software processing
2Device complexity
If color transitions are made abruptly, then the processing load is reduced, but the aesthetic quality deteriorates
Solution Approach 1:
The patent segments the color transition process into discrete control steps using counter-based logic. Each color component (R, G, B) is controlled through separate but coordinated counter circuits that increment or decrement in a structured sequence, enabling smooth transitions through systematic segmentation of the transition process rather than abrupt changes
3Measurement precision
If different color components transition at different rates, then individual color precision is improved, but the coordination between channels deteriorates
Solution Approach 1:
The patent merges the control of multiple color channels through a unified control structure where parallel adders and counters operate in coordination. The control logic combines the transition requirements of R, G, and B channels into a unified sequence of control words, ensuring that while each channel can be precisely controlled, they all transition in a synchronized manner through the shared control architecture
Data Source
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AI summary
Representative implementations of devices and techniques provide a linear walk arrangement for a control signal. A modified clock signal is used to increment or decrement a value of the control signal toward a target value. The modified clock signal is based on a specified transition time and a difference between an initial value for the control signal and the target value. Multiple control signals may be transitioned such that the control signals arrive at their respective target values simultaneously, notwithstanding the differences in transitions among the control signals.