LED Light String Address Writing Triggered by External Signals
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Solution Overview
Problem
Existing LED decorative lights face challenges with address code writing during assembly, leading to errors, increased production costs, and instability due to fixed address codes being written into driver chips, and alternative methods based on module positions are costly and unreliable.
Innovation Solution
An LED decorative light system where address codes are written externally via a controller, utilizing external signals such as lightwaves, temperature changes, magnetic, or electromagnetic waves to trigger code writing in driver chips, allowing flexible and reliable address code assignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If address codes are written into driver chips during assembly, then individual control of LED modules is enabled, but assembly errors increase and production costs increase
Solution Approach 1:
The driver chip is pre-configured with code writing capability and remains in a non-writing state during assembly. The address code is written only after the LED module is assembled into the light string, eliminating the need for precise address code writing during the assembly process and reducing assembly errors.
Solution Approach 2:
The LED module itself performs the address code writing function through its driver chip, which automatically writes the address code based on the position signal detected during operation. This eliminates the need for external equipment or manual intervention for address code writing, simplifying the manufacturing process.
2Ease of operation
If fixed address codes are written into driver chips, then individual control is achieved, but code writing errors and production costs increase
Solution Approach 1:
The driver chip transitions from a static state with pre-written fixed address codes to a dynamic state where the address code is determined by the position signal detected during operation. This allows the address code to be dynamically assigned based on the actual position of the LED module in the light string, improving writing accuracy.
Solution Approach 2:
The address code parameter is changed from a fixed value written during manufacturing to a variable value determined by the position signal. This parameter change enables the address code to adapt to the actual installation position, eliminating writing errors caused by fixed pre-assignment.
3Device complexity
If alternative methods based on module positions are used, then address code assignment is simplified, but reliability and cost-effectiveness decrease
Solution Approach 1:
A position signal serves as an intermediary between the LED module's physical position and its address code assignment. The driver chip detects the position signal (such as a light signal from a specific direction) and uses it to determine the address code, providing a reliable and stable mapping between position and address without complex external systems.
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 approach reduces assembly errors and production costs by enabling reliable and efficient code writing, ensuring stable and controllable LED module operations.
Implementation Method 1
The driver chip includes a photosensitive module. The external signal is a lightwave. After the photosensitive module receives the lightwave, the driver chip completes code writing based on the control signal.
Implementation Method 2
the driver chip includes a thermosensitive module, and the external signal is a temperature change signal. After the thermosensitive module receives the temperature change signal, the driver chip completes code writing based on the control signal.
Implementation Method 3
the driver chip includes a magnetic signal sensing module, and the external signal is a magnetic change signal. After the magnetic signal sensing module receives the magnetic change signal, the driver chip completes code writing based on the control signal.
Implementation Method 4
the driver chip includes a high-frequency electromagnetic wave sensing module, and the external signal is a high-frequency electromagnetic wave signal. After the high-frequency electromagnetic wave sensing module receives the high-frequency electromagnetic wave signal, the driver chip completes code writing based on the control signal.
Data Source
AI summary
A light-emitting diode (LED) decorative light with code writing triggered by an external signal, includes: a controller and a light string. A positive terminal and a negative terminal of the controller are connected to the light string. The controller supplies power to the light string through the positive terminal and the negative terminal, and loads a control signal on the positive terminal or/and the negative terminal. The light string includes a plurality of code-writable LED modules. After receiving an external signal, the code-writable LED modules complete code writing according to the control signal. Highly efficient code writing for LED modules through external signal triggering can be achieved, thereby avoiding address code writing errors caused by writing addresses during the assembly of LED modules into the light string, and preventing the instability and unreliability of determining LED module address codes based on their positions in the LED light string.