LED Light String Optical Address Encoding
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Solution Overview
Problem
The assembly efficiency of point-wise controlled decorative LED light strings is low due to the time-consuming process of inputting address codes into control ICs and the risk of errors during assembly, especially when connecting LEDs with encoded address codes.
Innovation Solution
The solution involves connecting control ICs without pre-encoded address codes to RGB LEDs, leading only the positive or negative power terminals outside for packaging, and using a voltage amplifier circuit to encode address codes optically after the string is assembled, allowing for quick and error-free assembly by eliminating the need for sequential address code input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If address codes are input sequentially into control ICs before assembly, then the LED light string can be point-wise controlled, but the assembly efficiency is extremely low and time-consuming
Solution Approach 1:
The patent inverts the traditional sequence by assembling the LED light string first with control ICs that have blank address codes, and then inputting the address codes after assembly. This reversal eliminates the time-consuming sequential coding process during assembly, dramatically improving assembly efficiency while maintaining point-wise control capability.
Solution Approach 2:
The patent performs the assembly action before the address code input action, which is the opposite of the traditional approach. By assembling the components first with blank address codes and then coding them afterward, the time-consuming coding operation is separated from the assembly process, thereby improving overall assembly efficiency.
2Productivity
If address codes are encoded after control ICs are assembled with LED lights, then assembly time is reduced, but the connection process at different electrical levels takes long time and is troublesome
Solution Approach 1:
The patent segments the address code input process from the assembly process. By designing the control IC to accept address codes through a simplified interface after assembly, the complex multi-level electrical connections required during assembly are avoided. The address code input becomes a separate, simpler operation that does not interfere with the assembly process.
3Reliability
If fuse structure or EPRPM/EEPROM structure is provided for control ICs to be burnt and programmed, then address codes can be stored, but the cost is relatively higher and encoding time is long
Solution Approach 1:
The patent employs a cost-effective address code storage solution that does not require expensive fuse structures or EPRPM/EEPROM memory components. Instead, it uses a simpler storage mechanism that can be programmed quickly without costly hardware, thereby reducing both the cost and encoding time while maintaining reliable address code storage.
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 method significantly enhances assembly efficiency by allowing arbitrary selection of control ICs and LEDs, reducing the time required for encoding, and ensuring successful assembly without pre-writing address codes, thus improving overall production speed and reducing costs.
Implementation Method 1
one electrode pin of the RGB light-emitting diode is connected to an input terminal of a voltage amplifier circuit through a resistor, and an output terminal of the voltage amplifier circuit is connected to a write terminal of the control IC
Data Source
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AI summary
A decorative LED light string structure comprises a plurality of LED light-emitting units, each of the units comprises an RGB light-emitting diode and a control IC, a common pin of the RGB light-emitting diode is connected to a positive power terminal of the control IC, three electrode pins of the RGB light-emitting diode are respectively connected to three control terminals of the control IC correspondingly, one of the electrode pins of the RGB light-emitting diode is connected with a voltage amplifier circuit, an output terminal of the voltage amplifier circuit is connected to a write terminal of the control IC, and the LED light-emitting units are connected in series or in parallel through the positive and negative power terminals of the control ICs. A method for assembling a decorative LED light string comprising the following steps: assembling an LED light string; encoding and inputting address code; and forming address code.