Synchronous LED Lamp String Controller for Uniform Color Changing
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Solution Overview
Problem
Existing LED lamp strings face challenges in achieving synchronous color changing effects due to independent operation of discrete control ICs in each module, leading to increased product costs and limited scalability in both parallel and series connections.
Innovation Solution
A synchronous LED lamp string controller is developed, comprising a clock synchronous circuit, counter circuit, control logic circuit, and driver circuit to receive a reference signal and generate control signals for synchronized operation of LED modules, enabling synchronized control of LED lamp strings with a simple structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If discrete control ICs are embedded in each LED module, then each module can operate independently, but the color changing of each LED module is not synchronized and product cost increases
Solution Approach 1:
The patent merges the control functions by removing discrete control ICs from individual LED modules and implementing a centralized control system. The controller generates synchronized control signals that are distributed to all LED modules, ensuring uniform color changing across the entire lamp string while reducing component count and product cost.
2Ease of manufacture
If LED modules are connected in parallel, then ease of connection is improved, but current consumption increases and power adapter complexity increases
Solution Approach 1:
The patent changes the electrical connection parameter from parallel to series configuration. In series connection, the same current flows through all LED modules, reducing total current consumption compared to parallel connection where each module draws independent current. This also simplifies the power adapter design as it only needs to provide a single current path.
3Use of energy by moving object
If LED modules are connected in series, then current consumption is reduced, but the number of LED modules that can be connected is limited by DC voltage
Solution Approach 1:
The patent introduces a controllable switch element in series with each LED module group, enabling dynamic control of the circuit configuration. The controller can selectively activate or deactivate individual modules or groups of modules, allowing the system to adapt the number of active modules based on power availability and desired effects, thus overcoming the static voltage limitation.
4Productivity
If multiple small power adapters are used, then the number of connectable lamp units is unlimited and structural complexity is reduced, but product cost increases
Solution Approach 1:
The patent merges multiple power adapter functions into a single centralized power supply unit. Instead of distributing multiple small power adapters throughout the lamp string, one power adapter provides power to all LED modules through the series-connected circuit, eliminating redundant components and reducing overall product cost while maintaining unlimited scalability.
Data Source
AI summary
The present invention discloses a synchronous LED lamp string controller, comprising a clock synchronous circuit to receive a reference signal with a constant frequency, and based on which, to generate a system clock; a counter circuit to counter the system clock and generate a clock signal; a control logic circuit to receive said clock signal to generate a control signal; and a driver circuit to receive said control signal to drive at least a light emitting diode.