Visible Light Communication Terminal Light Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Invisible light communication systems, such as those used in bio-sensors, face challenges with signal transmission due to varying light depths and scattering by human tissues, leading to inconsistent communication performance.
Innovation Solution
A method and apparatus for controlling the amount of light in a visible light communication system, where a terminal measures the received light and adjusts the light source signal based on threshold values or reception area sizes to ensure seamless signal transmission and reception between devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the amount of light is increased to penetrate deeper skin layers, then communication reliability improves, but energy consumption increases
Solution Approach 1:
The patent implements dynamic adjustment of light emission intensity based on real-time detection of received signal strength. The terminal controller continuously monitors communication quality and adapts the light amount accordingly, transitioning from fixed intensity to variable intensity control. This resolves the contradiction by using only the necessary light intensity for reliable communication rather than consistently high intensity.
Solution Approach 2:
The system establishes a feedback loop where the terminal measures the amount of light received from the sensor and uses this information to adjust subsequent light emission. When received light is insufficient (indicating deep insertion or poor alignment), the terminal increases light emission; when sufficient, it reduces emission. This feedback mechanism ensures reliable communication while optimizing energy consumption.
2Device complexity
If the light amount is fixed according to related art, then device complexity is reduced, but adaptability to different insertion depths deteriorates
Solution Approach 1:
The system implements self-adjustment where the terminal autonomously controls light emission based on its own detection of received signal quality. No external control or complex coordination is needed - the terminal serves itself by monitoring communication effectiveness and independently adjusting light intensity. This maintains simplicity while achieving adaptability.
Solution Approach 2:
The patent changes the parameter of light emission intensity from a fixed value to a variable parameter that adapts to communication conditions. By adjusting this key parameter based on detected signal strength, the system achieves versatility across different insertion depths without adding significant complexity to the device architecture.
3Reliability
If adaptive adjustment of light amount is implemented, then communication performance improves, but device complexity increases
Solution Approach 1:
The patent merges the light emission control function with the existing terminal's communication processing capabilities. The same controller that manages data transmission also controls light intensity adjustment, combining multiple functions into a single control unit. This integration approach improves communication performance while minimizing the increase in device complexity.
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 approach enables effective signal decoding from bio-sensors inserted at varying depths and improves communication efficiency by dynamically adjusting light levels, ensuring consistent performance regardless of insertion depth or light scattering.
Implementation Method 1
The bio-sensor may receive a light source signal from the external terminal, and may generate electrical power based on the acquired amount of light to transmit a signal
Data Source
AI summary
A method and an apparatus for controlling an amount of light in a visible light communication system are provided. In the visible light communication system, a terminal measures an amount of light for a light signal received from a sensor, determines whether the measured amount of light is less than a threshold value, increases an amount of light for a light source signal to transmit to the sensor when the measured amount of light is less than the threshold value, and transmits, to the sensor, a light source signal according to the increased amount of light.