Shared Power Supply for Illumination Light Communication
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Solution Overview
Problem
The existing visible light communication systems using lighting apparatuses face challenges with increased size and costs due to the need for separate power supply circuits for each communication tool, and the limited range of illumination light communication requires multiple lighting apparatuses, making system introduction cumbersome.
Innovation Solution
An illumination light communication apparatus that combines visible light communication and wireless communication using a shared control power supply circuit, incorporating a light source with a solid-state element, a power supply circuit, a switching element, a visible light communication signal circuit, and a wireless module to modulate light intensity and transmit radio wave beacon signals, reducing the size and cost of the apparatus.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate power supply circuits are provided for each communication tool (visible light communication and wireless communication), then each communication tool can operate reliably, but the size of the power supply circuit increases and costs increase
Solution Approach 1:
The patent merges the power supply circuits for visible light communication and wireless communication into a single shared power supply circuit. The control unit manages power distribution to both communication modules through this unified circuit, eliminating the need for separate power supply circuits while maintaining reliable operation of both communication functions.
Solution Approach 2:
The power supply circuit is designed with multi-functionality to serve both visible light communication and wireless communication modules. The control unit can dynamically allocate power to different modules based on their operational needs, making the single power supply circuit universally applicable to multiple communication tools.
2Measurement precision
If multiple lighting apparatuses are introduced to expand communication range, then location identification accuracy improves, but system size and introduction complexity increase
Solution Approach 1:
The patent combines visible light communication and wireless communication functions within a single lighting apparatus. This integration allows the system to achieve both accurate location identification (through visible light communication when lighting is on) and extended communication range (through wireless communication when lighting is off) without requiring multiple separate lighting apparatuses.
Solution Approach 2:
The lighting apparatus is designed with multi-functionality, incorporating both visible light communication and wireless communication capabilities in one device. This universal design simplifies system deployment by replacing multiple specialized apparatuses with a single multifunctional unit that can adapt to different operational conditions.
3Measurement precision
If only visible light communication is used, then location identification is accurate when illumination light is on, but communication cannot be established when illumination light is off
Solution Approach 1:
The patent changes the operational parameter of the communication system by switching between visible light communication and wireless communication based on the lighting state. When illumination light is on, visible light communication is used for accurate location identification; when illumination light is off, wireless communication takes over to maintain communication availability.
Solution Approach 2:
The lighting apparatus incorporates dual communication functions (visible light and wireless) to be universally applicable in both lit and unlit conditions. This multi-functionality ensures that the system can adapt to varying environmental conditions and maintain communication capabilities regardless of the illumination state.
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 solution allows for efficient and cost-effective implementation of visible light communication systems by sharing the control power supply between visible light and radio wave communication components, reducing the size and cost of the lighting apparatuses and enabling accurate location identification with enhanced communication range.
Implementation Method 1
a light source (11) including a solid-state light-emitting element
Implementation Method 2
a visible light communication signal circuit (4) which controls ON and OFF of a switching element (Q) to output a modulating signal for superimposing a visible light beacon signal including a unique ID onto the illumination light emitted from the light source
Data Source
AI summary
An illumination light communication apparatus includes: a light source; a power supply circuit; a switching element which modulates an output current supplied from the power supply circuit to the light source; a visible light communication signal circuit which controls ON and OFF of the switching element to output a modulating signal for superimposing a visible light beacon signal including a unique ID onto the illumination light emitted from the light source; a control power supply circuit which supplies power to the visible light communication signal circuit; a wireless module which transmits a radio wave beacon signal including a unique ID; and a radio wave beacon controlling and transmitting circuit which controls the radio wave beacon signal transmitted from the wireless module, wherein the radio wave beacon controlling and transmitting circuit is supplied with power from the control power supply circuit.