Imperceptible Light Modulation for Secure Data Transmission
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Solution Overview
Problem
Existing light-based communication techniques often compromise data security due to perceptible modulation of the light source, making the transmitted information vulnerable to detection.
Innovation Solution
A system and method utilizing a light source with imperceptible modulation, where data is encoded into a signal and transmitted through light changes undetectable to the human eye, using a modulator and decoder to ensure secure communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visible light modulation is used for data transmission, then communication capability is achieved, but data security deteriorates due to perceptible modulation
Solution Approach 1:
The patent changes the modulation parameter from visible frequency variations to ultrasonic frequency variations below human perception threshold. The audio signal is modulated at frequencies below 20kHz (human hearing limit), transforming the detectable visible modulation into imperceptible ultrasonic modulation, thereby securing data transmission while maintaining communication capability.
Solution Approach 2:
The patent introduces an intermediary conversion process where audio signals serve as the medium for data transmission. Instead of directly modulating visible light parameters, the system uses audio-frequency sound waves as an intermediary carrier that can be imperceptibly modulated to encode data, which is then detected by specialized receivers.
2Productivity
If audio-frequency modulation is used for light communication, then data transmission is achieved, but human perception of the modulation occurs
Solution Approach 1:
The patent shifts the modulation frequency parameter from the visible audio range (20Hz-20kHz) to the ultrasonic range (above 20kHz). This parameter change moves the modulation beyond human perception thresholds while preserving the data encoding capability, eliminating the harmful effect of human detection without sacrificing transmission productivity.
3Ease of operation
If conventional light modulation techniques are used, then communication is achieved, but vulnerability to compromise increases
Solution Approach 1:
The patent uses ultrasonic audio-frequency modulation as an intermediary mechanism that bridges data encoding and light transmission while remaining imperceptible. This intermediary approach maintains ease of operation through standard modulation techniques while significantly improving data security by operating below human perception thresholds.
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 secure and imperceptible data transmission using imperceptible light modulation, enhancing data security by preventing human eye detection and accidental perception, suitable for applications like vehicle authentication and security systems.
Implementation Method 1
a modulator configured to modulate light emitted by the light source, wherein the modulation is imperceptible to the human eye, and the modulated light includes the encoded data
Implementation Method 2
a receiver configured to receive the modulated light signal including the encoded data and convert the received light to a current signal
Data Source
AI summary
An exemplary system for communicating data includes a light source that emits light and a processing device that receives and encodes data into a communication signal. A modulator modulates light emitted by the light source, wherein the modulation is imperceptible to the human eye, and the modulated light includes the encoded data. The modulation of the transmitted light is imperceptible to a human eye. A receiving device receives the modulated light and processes the light to decode the encoded signal and obtain the data.