Three-Line LED Control Circuit Reducing Wire Count
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Solution Overview
Problem
Existing light strip control systems require multiple separate control lines for each light point, leading to increased complexity and cost, especially for larger installations, as each light point typically needs a separate control terminal to be individually turned on or off.
Innovation Solution
A light set circuit with four polarized LED light sources connected between three control signal lines, allowing each light source to be individually turned on using fewer control signal lines, with specific connections enabling selective activation based on signal polarity and floating states of the control lines, and a control apparatus with a processor and memory to manage flashing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each light point has a separate control terminal to be individually turned on or off, then the control flexibility and individual light source activation capability are improved, but the number of control lines and circuit complexity increase significantly
Solution Approach 1:
Multiple light sources (four LED light sources) are connected in parallel between three control signal lines, merging the control of multiple light sources into a shared control structure. This allows individual light source activation through selective signal application to the shared lines, reducing the total number of control lines from four (one per light source) to three while maintaining individual control capability.
Solution Approach 2:
The three control signal lines serve multiple functions simultaneously: they provide individual control paths for each of the four light sources, enable various flashing modes through different signal combinations, and support both steady-state and dynamic lighting patterns. Each control line participates in controlling multiple light sources under different signal conditions.
2Adaptability or versatility
If multiple control terminals are provided for each light point to enable individual control, then the ability to provide various flashing modes is improved, but the cost increases markedly for larger numbers of light point lights
Solution Approach 1:
The control apparatus generates control signals for multiple light sources using a reduced number of control terminals (three instead of four). The parallel connection architecture merges the control paths, allowing the same control lines to address different light sources at different times through selective signal application, thereby reducing component count and manufacturing cost while maintaining flashing mode variety.
Solution Approach 2:
The control apparatus implements various flashing modes by applying periodic control signals to the three control signal lines. Different flashing patterns (sequential, alternating, simultaneous, etc.) are achieved through different timing and sequencing of signals applied to the shared control lines, eliminating the need for additional dedicated control terminals for each flashing mode.
3Measurement precision
If separate control lines are used for each aspect of lighting, then the precision of light control is improved, but the wire quantity and installation complexity become prohibitive
Solution Approach 1:
Four separate control lines for individual light source control are merged into three shared control signal lines. The parallel connection architecture allows each light source to be selectively activated by applying control signals to appropriate combinations of the three shared lines, maintaining precise individual control while reducing wire quantity from four to three lines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for versatile and cost-effective control of multiple light sources using only three control signal lines, enabling various flashing modes and reducing the need for numerous control lines, thus simplifying the control of light strips while maintaining flexibility in visual effects.
Implementation Method 1
four LED light sources, the first and second LEDs being connected in reverse polarity with each other between the second and third control signal lines
Data Source
AI summary
A light set circuit having first, second, and third control signal lines arranged in parallel, with pairs of LEDs connected with reverse polarity between pairs of the signal lines. In operation, control apparatus applies a control signal level between one and either of the other signal lines, the remaining control signal line being kept in a floating state for activating a selected one of the four LEDs. A light strip includes plural light set circuits spaced along the control signal lines. In another variation, first and second light points are spaced along the three control signal lines, each including three different color LEDs respectively, there being three pairs of LEDs connected with reverse polarity between pairs of the signal lines for activating a selected one of the six LEDs by applying a control signal level between two of the signal lines, keeping the remaining signal line in a floating state.