Lighting Control Device Dual Band RF Interference Mitigation

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Solution Overview

Problem

Existing lighting devices for nurseries face radio frequency interference issues due to the use of Bluetooth and Wi-Fi, which operate at similar frequencies, leading to control errors when simultaneously communicating with a remote controller and a mobile device.

Innovation Solution

The implementation of a control device that uses different wireless networks for communication with a remote controller and a mobile device, such as Walkie Talkie for the remote controller and Wi-Fi/Bluetooth for the mobile device, to mitigate RF interference by operating at distinct frequency bands.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If Bluetooth and Wi-Fi are used to connect to remote controller and mobile device simultaneously, then communication functionality is improved, but radio frequency interference occurs causing control errors

Engineering Contradiction:

Improvecommunication functionalityVSAvoidcontrol accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent divides the communication system into separate frequency bands: sub-1 GHz band for remote controller communication and 2.4 GHz band for mobile device communication. This segmentation prevents RF interference between the two communication channels while maintaining both communication functionalities simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the operating frequency parameter of the wireless communication system. Instead of using the same frequency band for all devices, it assigns different frequency bands (sub-1 GHz vs 2.4 GHz) to different communication pairs, thereby eliminating frequency-based interference and improving control reliability.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If different wireless networks operating at different bands are used, then radio frequency interference is reduced, but device complexity increases

Engineering Contradiction:

ImproveRF interference reductionVSAvoidcommunication system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The lighting device incorporates multi-functional communication capability by integrating both sub-1 GHz and 2.4 GHz wireless modules. This universal design allows the device to communicate with different types of controllers (remote controller and mobile device) using appropriate frequency bands, reducing RF interference while maintaining system functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11606852B2Voice communication between lamp and remote device plus lighting control via remote device

Publication Date: 2023.03.14 SAVANT TECHNOLOGIES LLC

AI summary

A control device, lighting device including the control device, a lighting system and a method for controlling the lighting device are provided. In embodiments, the control device may comprise a communication unit and a controller. The communication unit may be operable to communicatively connect with a remote controller via a first wireless network and operable to communicatively connect with at least one mobile device via a second wireless network. The controller may be coupled to the communication unit and the lighting device, and configured to control the lighting device based on at least one signal of those received by the communication unit from the remote controller and the at least one mobile device. The first wireless network and the second wireless network operate at different bands. The lighting system may include the lighting device and the remote controller.