LED String Control Module Voltage Level Logic Identification
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Solution Overview
Problem
Existing LED string control systems face issues with waveform distortion due to parasitic capacitance, leading to misjudgment of digital logic '0' or '1' when relying solely on time width for signal identification.
Innovation Solution
The proposed LED string control system uses a control module that adjusts voltage levels based on specific sequences of first and second digital logics, employing distinction voltage levels with different time widths to accurately determine digital logic, reducing reliance on time width alone for signal identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If time width alone is used to determine digital logic in LED string control, then the control method is simple, but waveform distortion due to parasitic capacitance causes misjudgment of digital logic
Solution Approach 1:
The patent changes the parameter used for digital logic identification from time width alone to a combination of voltage level and time width. By monitoring both the voltage level (first voltage level for logic 1, second voltage level for logic 0) and the time width of the signal, the system can accurately identify digital logic even when waveform distortion occurs due to parasitic capacitance. This dual-parameter approach resolves the contradiction by maintaining control method simplicity while significantly improving identification accuracy.
2Quantity of substance
If parasitic capacitance is large in LED string, then the system can support more LEDs and longer distances, but the square wave waveform becomes distorted
Solution Approach 1:
The patent introduces voltage level as an intermediary parameter to accurately identify digital logic despite waveform distortion. By using both voltage level detection and time width measurement, the system can penetrate through the distortion caused by large parasitic capacitance and correctly identify the underlying digital logic. This intermediary approach allows the system to support more LEDs and longer distances without being limited by waveform quality degradation.
3Length of stationary object
If square wave waveform is distorted, then transmission distance can be extended, but signal identification time increases due to misjudgment
Solution Approach 1:
The patent changes the identification approach from relying solely on time width to using both voltage level and time width parameters. This dual-parameter method enables faster and more accurate signal identification by detecting voltage level transitions, which remain clear even when waveform distortion occurs during long-distance transmission. Consequently, the system can extend transmission distance without incurring time losses from repeated misjudgments and re-identifications.
Data Source
AI summary
An LED string control system includes an LED string and a control module. The LED string incudes a plurality of LED modules. The control module is coupled to the LED modules, and provides a control signal to control the LED modules to generate lighting behavior based on a light command. The light command is composed of a plurality of first digital logics and a plurality of second digital logics in a specific sequence. The control module respectively provides a plurality of first voltage levels and a plurality of second voltage levels to form the control signal based on the first digital logics and the second digital logics of the light command.