Three-Line LED Strip Circuit for Narrower, Longer Color Modulation
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Solution Overview
Problem
Existing LED strip technologies face limitations in length due to the use of four signal lines, material width exceeding 8 mm, and inefficient circuit utilization, leading to increased material usage and manufacturing costs.
Innovation Solution
A LED strip design utilizing at least three signal lines, with each signal line connected to a control component and an LED between every two lines, and a control system to generate control signals for sequential and circular driving, reducing the number of signal lines to three and improving circuit efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If four signal lines are used to power LED strips, then the dimming and color modulation functions can be realized, but the light strip length is limited and the width cannot be reduced below 8 mm
Solution Approach 1:
The patent combines multiple functions into fewer signal lines. By using bidirectional control components (MOSFETs) that can switch current direction, the same three signal lines serve both as power supply and control pathways for multiple LED groups, eliminating the need for separate dedicated control lines for each LED group.
Solution Approach 2:
Each signal line performs multiple functions: it supplies power to different LED groups at different times, carries control signals for bidirectional switching, and enables both dimming and color modulation. The control components themselves are universal, handling both P-type and N-type LED driving in the same circuit path.
2Adaptability or versatility
If four signal lines are used with multiple LEDs per line, then color modulation is achieved, but circuit utilization is low and material usage increases
Solution Approach 1:
The control system operates in periodic cycles, sequentially activating different groups of LEDs connected to the same signal lines. By timing the switching of bidirectional control components, the patent achieves color modulation through time-division multiplexing, where different LED groups are activated in sequence or combination to produce various colors, fully utilizing the same physical线路 resources.
3Ease of manufacture
If three signal lines are used to reduce width and material, then manufacturing cost decreases, but the ability to control multiple LED colors is compromised
Solution Approach 1:
The patent introduces dynamic bidirectional switching control using MOSFETs that can change their conduction direction based on control signals. This dynamic switching capability allows three static signal lines to effectively serve multiple functional purposes, controlling different LED groups with different polarities at different times, thereby maintaining full color control capability while reducing the physical number of lines.
Data Source
AI summary
A LED strip comprises at least three colors of LEDs and at least three signal lines, and an LED with one color is connected between every two signal lines; it further includes control components with the same number as the signal lines, and the control components are connected to one end of the signal lines; tit further includes a control system coupled with the control components and used for sequentially and circularly outputting two groups of control signals, thereby sequentially and circularly driving the two control components, and the total number of control signals output by the control system is not less than the number of LED colors.