Distributed Lighting Control With Repeated Sync Messages
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Solution Overview
Problem
Existing lighting systems struggle with synchronizing operations among a large number of distributed lighting devices without temporal delays, particularly when controlling tens or hundreds of thousands of devices, and require efficient message transfer methods to ensure accurate and simultaneous operation.
Innovation Solution
A lighting device system that includes a light source unit, communication units for receiving and storing data, and a processor that controls operation timing through repeated message reception, along with a control device and repeaters that broadcast messages to ensure synchronized operation using pre-stored light output patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a large number of lighting devices are deployed in a wide space, then the coverage area is improved, but the synchronization accuracy deteriorates due to message omission and temporal delays
Solution Approach 1:
The lighting devices pre-store library data containing multiple light output patterns before operation. When a control message is received, the processor selects and executes the appropriate pre-stored pattern, enabling rapid synchronized response across distributed devices without requiring complex real-time communication for each control detail
Solution Approach 2:
The system uses periodic control messages transmitted at predetermined time intervals to repeatedly instruct lighting devices to execute specific light output patterns from the pre-stored library. This periodic transmission ensures that even if some messages are omitted in a wide area, subsequent messages can reinforce the control instruction, maintaining synchronization accuracy across the expanded coverage area
2Manufacturing precision
If control messages are transmitted frequently to ensure synchronization, then the synchronization accuracy is improved, but the message transfer efficiency deteriorates due to increased communication load
Solution Approach 1:
The control system extracts only the essential control information (library identification and pattern selection) from detailed control instructions. By transmitting compact control messages that reference pre-stored library data rather than sending complete control sequences, the system maintains high synchronization accuracy while minimizing communication load and maximizing message transfer efficiency
Solution Approach 2:
Detailed light output patterns are prepared and stored in the library data before operation. The control messages only need to reference these pre-prepared patterns by identification, eliminating the need to transmit lengthy control sequences during operation. This preliminary preparation enables both high synchronization accuracy and efficient message transfer
3Manufacturing precision
If detailed control information is transmitted to each lighting device, then the control precision is improved, but the message capacity requirement increases
Solution Approach 1:
Instead of transmitting complete control sequences to each lighting device, the system transmits compact control messages containing library identification and pattern selection information. The actual detailed control data exists as copies in the pre-stored library data at each device, eliminating the need to transmit large amounts of control information while maintaining high control precision
Solution Approach 2:
The library data containing detailed light output patterns is prepared and stored in advance at each lighting device. This preliminary action allows control messages to be kept small (only containing pattern selection information) while still achieving precise control, as the full control information is already available locally in the pre-stored library
Data Source
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AI summary
A lighting device according to an embodiment of the present invention comprises: a light source unit; a first communication unit for receiving library data from a mobile terminal; a storage unit for storing the library data; a second communication unit for receiving a control message indicating an execution command of a library corresponding to the library data from a control device; and a processor for controlling the light source unit such that the library is executed according to the control message, wherein the processor can control operation timing of the light source unit by sequentially receiving the control message at least a predetermined number of times at the initiation of the execution of the library.