Modular LED String Control Circuit Segmentation
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Solution Overview
Problem
Existing modular lighting systems with discrete light sources, such as LEDs, face challenges in controlling the on/off state and output level of individual light output devices in a simple manner while allowing the string to be reduced in length without affecting brightness.
Innovation Solution
The implementation of microcontrollers associated with each light source device arrangement, connected via a shared control line, enables independent control of each device using a serial data signal, allowing the string to be shortened by disconnecting connector arrangements while maintaining consistent brightness through series or parallel connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a string of light output devices is designed to be cut to any length, then the adaptability of the device is improved, but the control complexity of individual light output devices increases
Solution Approach 1:
The light string is divided into modular light source device arrangements that can be independently controlled. Each arrangement has its own control circuit, allowing the string to be segmented and reconfigured without affecting control capability. This segmentation enables cutting to any length while maintaining simple control through the daisy-chain architecture.
Solution Approach 2:
A serial data signal acts as an intermediary to transmit control information through the daisy-chained control circuits. The control signal propagates sequentially through each module, eliminating the need for complex individual wiring to each light source. This intermediary signal mechanism simplifies control while enabling modular configuration.
2Ease of operation
If microcontrollers are added to each light source device arrangement for independent control, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The control circuit is merged with each light source device arrangement, integrating the microcontroller directly into the modular unit. This consolidation allows independent control of each arrangement while maintaining a uniform, simplified modular structure. The merging eliminates separate control hardware and simplifies the overall system architecture.
Solution Approach 2:
Each control circuit is designed as a universal module that can control its associated light source device arrangement independently. The same control circuit design is replicated across all modules, providing multi-functional capability while reducing overall complexity through standardization. This universal design allows any module to be controlled in the same simple manner.
3Ease of manufacture
If a single data line is used to control multiple light source device arrangements, then the ease of manufacture is improved, but the reliability of control signal transmission decreases
Solution Approach 1:
The control signal transmission path is segmented into sequential stages, with each control circuit receiving the serial data signal and processing it independently before passing it to the next stage. This segmentation isolates potential transmission errors to individual modules, improving reliability while maintaining the simplicity of a single data line architecture.
Solution Approach 2:
The serial data signal provides a feedback mechanism where each control circuit processes the signal and passes it along the chain. This sequential feedback approach ensures reliable transmission by allowing each module to independently process and forward the control information, reducing the impact of signal degradation or interference.
Data Source
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AI summary
A light output device comprises a power supply and a plurality of light source device arrangements arranged in a line extending from a power connection, with adjacent light source device arrangements in the line connected together with an electrical connector arrangement. Each light source device arrangement is associated with a control circuit from the plurality of control circuits for providing independent control of the light source device arrangement output based on the control signal. The device can be reduced in length by disconnecting the connector arrangement between an adjacent pair of light source device arrangements and the remaining light source device arrangements extending from the power source are independently controlled by the control signal.