Lighting Group Synchronization Using Multicast Load Control
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Solution Overview
Problem
Existing lighting control systems face challenges in synchronizing the state and intensity of multiple lighting devices, leading to out-of-sync conditions that require manual adjustment by users.
Innovation Solution
A remote control device that communicates wirelessly to synchronize the on/off state and intensity of multiple lighting devices, using techniques such as multicast messages and query responses to ensure quick and organized control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a common lighting control device controls a group of lighting devices, then the lighting devices can be controlled collectively, but some lighting devices may become out of sync with the rest of the group when independently controlled by another lighting control device
Solution Approach 1:
The control device determines visual feedback to display on a status indicator using information regarding the lighting devices. The status indicator provides visual feedback about the state of lighting devices, allowing users to see whether devices are in sync or out of sync, and enabling the system to respond appropriately to maintain synchronization.
Solution Approach 2:
The control device sends a multicast message to synchronize the state of a subset of lighting devices before executing the toggle command on the entire group. This preliminary synchronization action ensures that all lighting devices are in the same state before the collective control action is applied, preventing out-of-sync conditions.
2Adaptability or versatility
If independent control of a subset of lighting devices is allowed, then user flexibility is improved, but the complexity of maintaining synchronization across the entire group increases
Solution Approach 1:
The control device acts as an intermediary that manages synchronization between independently controlled lighting devices and the common group. It monitors the state of individual devices and sends synchronization commands to maintain consistency, thereby reducing the complexity burden on users while preserving independent control flexibility.
3Measurement precision
If the control device provides detailed status information for each lighting device, then measurement precision is improved, but the complexity of the status indicator increases
Solution Approach 1:
The control device provides different types of visual feedback on the status indicator depending on the specific state of lighting devices. When devices are in sync, a first type of visual feedback is provided; when out of sync, a second type of visual feedback is provided. This localized differentiation maintains measurement precision while managing indicator complexity through context-appropriate displays.
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
A load control system may include control devices for controlling electrical loads. The control devices may include load control devices, such as a lighting device for controlling an amount of power provided to a lighting load, and controller devices, such as a remote control device configured to transmit digital messages for controlling the lighting load via the load control device. The remote control device may communicate with the lighting devices via a hub device. The remote control device may detect a user interface event, such as a button press or a rotation of the remote control device. The remote control device or the hub device may determine whether to transmit digital messages as unicast messages or multicast messages based on the type of user interface event detected. The remote control device, or other master device, may synchronize and/or toggle an on/off state of lighting devices in the load control system.