Vehicle Visible Light Communication Modulation for Extended Vision
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Solution Overview
Problem
Drivers face challenges in obtaining timely and accurate visual field information outside their vehicle's visual range, which affects driving safety.
Innovation Solution
A vehicle-mounted visible light emission system and reception system that uses a visible light communication network to transmit and receive vehicle information, processed through modulation, compression, encryption, and decoding, using LED signals to convey binary code streams, enabling communication between vehicles and displaying relevant information on a Head-Up Display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If vehicle information is transmitted using visible light communication, then information transmission between vehicles is enabled, but the system complexity increases due to requiring emission units, reception units, and processing units
Solution Approach 1:
The patent applies multi-functionality by enabling vehicle lights to serve dual purposes: their original function for illumination and signaling, plus a new function for data communication. The visible light emission unit can modulate light intensity to encode information, while the reception unit detects these variations to decode data, allowing the same hardware components to perform multiple functions without requiring separate dedicated communication devices.
Solution Approach 2:
The patent uses visible light as an intermediary medium to transfer information between vehicles. The emission unit converts electrical signals representing data into optical signals through modulation, and the reception unit converts optical signals back into electrical signals. This optical intermediary enables wireless information transmission without direct electrical connection between vehicles, reducing system complexity compared to wired approaches.
2Ease of operation
If visible light signals are used for communication, then information can be transmitted without physical connection between vehicles, but the transmission stability may be affected by environmental factors such as light obstruction and interference
Solution Approach 1:
The patent employs periodic action through light modulation, where the emission unit switches the light source between bright and dim states at specific frequencies to encode data. The reception unit detects these periodic variations in light intensity to recover the transmitted information. This periodic modulation provides a reliable encoding mechanism that distinguishes data signals from ambient light variations.
Solution Approach 2:
The patent implements feedback mechanisms where the reception unit continuously monitors the received light signals and adjusts its detection parameters accordingly. The system can detect signal quality variations and request retransmission or adjust modulation depth to maintain stable communication, compensating for environmental factors such as partial light obstruction or interference.
3Loss of information
If light intensity is modulated to encode information, then data transmission is achieved, but the original lighting function of vehicle lights may be compromised
Solution Approach 1:
The patent applies dynamics by making the light output adaptable rather than static. The emission unit can dynamically adjust its modulation depth and frequency based on the required data transmission rate and the original lighting function requirements. During communication, the system can switch between different operational modes: normal illumination mode for safety lighting, communication mode for data transmission, or hybrid mode where both functions coexist through time-division or frequency-division multiplexing.
Solution Approach 2:
The patent uses periodic action through controlled light modulation where data encoding is superimposed on the base light output. The emission unit modulates the light source at specific frequencies that are distinguishable from the human eye's perception threshold, allowing communication signals to be embedded within the lighting function without completely compromising either objective.
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
Enhances driving safety by providing timely and accurate visual field information, enabling drivers to understand road conditions outside their immediate view through a communication network that stabilizes information transmission between vehicles.
Implementation Method 1
a visible light emission unit configured to transmit a visible light signal in a manner of switching between dimming and brightening over time based on the processed vehicle information
Implementation Method 2
a visible light reception unit configured to receive, from another vehicle, a visible light signal carrying vehicle information of the other vehicle in a manner of switching between dimming and brightening over time
Data Source
AI summary
The present disclosure provides a vehicle-mounted visible light emission system and reception system and a communication network. The vehicle-mounted visible light emission system comprises: a vehicle information acquisition unit configured to acquire vehicle information to be transmitted; a processing unit configured to process the vehicle information acquired by the vehicle information acquisition unit; and a visible light emission unit configured to transmit a visible light signal in a manner of switching between dimming and brightening over time based on the processed vehicle information.