Modulated Vehicle Light Communication System
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Solution Overview
Problem
Current vehicle communication systems, such as LED arrays, are limited in conveying complex information to drivers, as they rely solely on visual signals and are not well-suited for providing dynamic traffic information or detour instructions, often requiring manual operation that is unsafe while driving.
Innovation Solution
A communications arrangement that uses modulated vehicle lights, including turn signals, brake lights, and headlights, with a processor and modulator to encode and transmit messages at frequencies imperceptible to humans, allowing for dynamic information exchange between vehicles and traffic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If LED arrays are used for vehicle signals, then visual communication is provided, but the information content is limited and complex messages cannot be conveyed
Solution Approach 1:
The patent applies periodic modulation to vehicle lights at frequencies above human perception (greater than 15 Hz). By encoding information in the temporal pattern of light emission rather than relying solely on static visual states, the system can convey complex messages while maintaining simple LED array hardware. The modulator varies the intensity or timing of light emission in coded patterns that represent different information content.
2Loss of information
If radio is used for traffic reports, then information is provided, but it is not comprehensive, current, or continuous
Solution Approach 1:
The patent implements a feedback mechanism where receiving vehicles detect modulated signals from transmitting vehicles and relay this information to other vehicles in the network. This creates a distributed, real-time information exchange system where traffic conditions are continuously updated across the vehicle network, ensuring information remains current and comprehensive without relying on centralized radio broadcasts.
3Ease of operation
If wireless devices are used for information, then communication is provided, but manual operation is required which is unsafe while driving
Solution Approach 1:
The patent enables vehicles to automatically transmit and receive information through modulated light signals without requiring driver intervention. The system operates autonomously by detecting other vehicles' signals and providing information through the vehicle's existing display systems, allowing drivers to receive traffic information passively while maintaining focus on the road.
4Loss of information
If modulated lights are used for communication, then complex information can be transmitted, but the modulation frequency must be imperceptible to humans
Solution Approach 1:
The patent changes the frequency parameter of light modulation to exceed human perception thresholds (greater than 15 Hz). By operating in this high-frequency regime, the system encodes complex information in temporal variations that are too rapid for human eyes to detect as flicker, while photodetectors can easily capture and decode these modulated signals. This parameter shift allows simultaneous achievement of high information capacity and natural-looking light output.
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
Enables safer and more efficient communication of complex traffic information to drivers, enhancing situational awareness and route planning by transmitting encoded messages through vehicle lights, improving traffic management and reducing congestion.
Implementation Method 1
produce in response an encoded main signal selectively modulated at or above a critical flashing frequency or with a pulse duration that is human imperceptible
Implementation Method 2
The receiver has a light sensing device for producing a detection signal
Data Source
AI summary
A method for communicating with a vehicle has a generator for producing a data stream that can indicate, street sign information, house number, lead vehicle information, traffic information, oncoming vehicle information, juxtaposed vehicle information, a voice channel, etc. vehicle information can indicate braking, low beam requests, direct or indirect traffic flow information, adjacency, partial adjacency, or presence of nearby vehicles, etc. This signal is generated by at least one of: the sign, house number, oncoming vehicle, lead vehicle, operator of the lead vehicle, operator of the oncoming vehicle, operator of the juxtaposed vehicle, a traffic control system. A device for generating such data streams is discussed, as well as, a device for receiving such data streams. Information pertinent to the people in the vehicles or operation of the vehicle can be modulated on the link.