LED Light String Control via Voltage Level Signal Identification
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Solution Overview
Problem
Existing LED light string control systems face issues with signal misjudgment due to waveform distortion caused by large parasitic capacitance, leading to insufficient time width determination of logic signals '0' and '1', resulting in uncontrollable LED light strings.
Innovation Solution
An LED light string control system that uses a voltage generation apparatus and a control module to change signals to specific voltage levels based on logic commands, allowing for signal level identification instead of time width, thereby distinguishing consecutive voltage levels to generate lighting behaviors accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If time width is used to determine logic signals, then the control method is simple, but waveform distortion due to parasitic capacitance causes misjudgment and insufficient time width
Solution Approach 1:
The patent changes the determination parameter from time width to voltage level. The control module identifies logic signals by detecting voltage levels (first voltage level for logic 0, second voltage level for logic 1) rather than measuring time width, which is distorted by parasitic capacitance. This parameter change resolves the contradiction by maintaining simple control operation while achieving reliable signal identification despite waveform distortion.
2Reliability
If voltage level is used to determine logic signals, then signal identification accuracy is improved, but the system complexity increases due to voltage generation apparatus
Solution Approach 1:
The patent merges the voltage generation apparatus with the control module into an integrated unit. The control module both controls the voltage generation apparatus to output different voltage levels and determines logic signals by detecting these voltage levels. This merging reduces overall system complexity while maintaining the reliability benefits of voltage-level-based signal identification.
3Speed
If consecutive logic signals are transmitted without distinction, then transmission speed is fast, but signal boundaries cannot be distinguished
Solution Approach 1:
The patent introduces a third voltage level as an intermediary between the first voltage level (logic 0) and second voltage level (logic 1). When consecutive logic signals of the same type are transmitted, the third voltage level is inserted between them to mark the signal boundary. This intermediary voltage level enables clear distinction of consecutive signals while maintaining fast transmission speed, as the boundary marking is integrated into the voltage level sequence rather than requiring separate timing mechanisms.
Data Source
AI summary
An LED light string control system includes an LED light string, a voltage generation apparatus, and a control module. The control module controls the voltage generation apparatus to change a signal provided to the LED light string to a first voltage level according to a first logic of a light command, and changes the signal to a second voltage level according to a second logic of the light command. The control module controls the voltage generation apparatus to change the signal to a distinction voltage level once the first logics and/or the second logics of the light command appear consecutively.