Visible Light Communication Signal Pattern Generation
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Solution Overview
Problem
In Visible Light Communication (VLC) systems, users cannot intuitively confirm the data transmission status or amount during communication, unlike infrared communication, which lacks visibility and user convenience.
Innovation Solution
A method and apparatus for generating a visible light signal based on the data transmission ratio between VLC devices, using a VLC device with a data processor to determine the signal pattern corresponding to the data ratio and output visible light signals, allowing users to visually confirm data transmission through varying colors, flickering speeds, or intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If VLC uses visible light for communication, then users can visually confirm communication channel state, but users still cannot intuitively confirm data transmission amount
Solution Approach 1:
The patent applies color changes by mapping different data transmission ratios to different visible light colors. The receiving device changes the color of emitted visible light based on the current data reception ratio, allowing users to intuitively understand transmission progress through color variations. For example, different colors represent different ranges of reception ratios, making the invisible data transmission state visible and comprehensible to users.
Solution Approach 2:
The patent employs periodic action through flickering visible light signals. The receiving device causes the visible light to flicker at different frequencies or patterns corresponding to different data transmission ratios. This periodic variation in light emission enables users to perceive transmission progress through the rhythm and pattern of light flickering, transforming abstract data ratios into observable temporal patterns.
2Reliability
If VLC transmits data using invisible infrared wavelengths, then communication can be established between devices, but users cannot know the communication link state or transmission progress
Solution Approach 1:
The patent applies universality by enabling the visible light source to serve dual functions: transmitting data through modulation and simultaneously displaying transmission status through color and flickering patterns. The receiving device similarly uses visible light for both receiving data and providing visual feedback about reception status. This multi-functionality eliminates the need for separate indicator devices and integrates status display directly into the communication light source.
Solution Approach 2:
The patent uses color changes in visible light to represent different communication states and transmission ratios. By mapping communication status information to specific color variations, the system makes the invisible communication link state visible to users, allowing them to understand whether communication is active and what portion of data has been transmitted or received.
Data Source
AI summary
A method and apparatus are provided for generating a visible light signal according to an amount of data transmission in a first Visible Light Communication (VLC) device. The method includes determining a ratio of an amount of data that has been received from a second VLC device to a total amount of data to be received; determining a visible light signal pattern corresponding to the ratio; generating a visible light signal corresponding to the visible light signal pattern; and outputting the visible light signal.