Visible Light Communication Apparatus Using Color-Coded Status Indication
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Solution Overview
Problem
Visible light communication systems face challenges in allowing users to intuitively determine data transfer speed and channel alignment status, as existing methods do not provide clear visual cues for synchronization and channel quality, leading to obscure data transfer confirmation.
Innovation Solution
A visible light communication apparatus that selectively operates light sources with different wavelengths based on channel status, using a color packet system to transmit intuitive information, allowing users to visually recognize data transmission speed and secure better communication channels by adjusting the number and priority of light sources used, and enabling intuitive distinction of communication and file transfer statuses through color changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If multiple light sources with different wavelengths are used to transmit intuitive information, then users can visually recognize data transmission speed and channel status, but power consumption increases
Solution Approach 1:
The patent uses different wavelengths (colors) of light to encode different types of information. Specifically, blue light indicates data transmission in progress, green light indicates ready-to-transmit state, and yellow light indicates synchronization establishment. This color-based encoding allows users to intuitively understand communication status without additional text or symbols, resolving the contradiction by making information visible through natural light properties rather than consuming extra energy for separate indication systems.
Solution Approach 2:
The patent implements periodic transmission of color packets at specific intervals (e.g., every 100ms during synchronization, every 500ms during data transmission). This periodic action allows the system to convey status information efficiently without continuously activating all light sources, thereby reducing overall power consumption while maintaining effective visual feedback for users.
2Ease of operation
If all light sources are operated continuously to provide clear visual feedback, then users can always know communication status, but device complexity and power consumption increase
Solution Approach 1:
The patent activates only the specific light source corresponding to the current communication state rather than all light sources continuously. For example, only the blue light source is activated during data transmission, only green during ready-to-transmit state, and only yellow during synchronization. This local quality approach provides clear visual feedback for each state while simplifying the control system compared to managing multiple simultaneously active light sources.
Solution Approach 2:
The patent extracts and uses only the essential wavelength information needed for status indication from the full spectrum of available light sources. By selecting specific wavelengths (blue, green, yellow) that correspond to specific communication states, the system provides comprehensive status awareness without requiring the complexity of managing all possible light sources, thus reducing device complexity while maintaining ease of operation.
3Loss of information
If light sources are used to indicate data transfer status, then users can grasp communication state, but the indication is obscure without clear visual cues for speed and channel quality
Solution Approach 1:
The patent assigns specific colors to different communication states and qualities: blue light for active data transmission, green for ready-to-transmit, yellow for synchronization established. This color-coding system provides immediate, intuitive visual recognition of communication state without requiring users to interpret complex technical parameters, thereby eliminating the difficulty of detecting and measuring transmission status.
4Device complexity
If unnecessary light sources remain active, then the system is simpler to control, but power consumption increases without providing additional useful information
Solution Approach 1:
The patent implements dynamic light source management where the activation state of each light source changes according to the current communication phase. During synchronization, yellow light is activated; during data transmission, blue light is activated; during idle ready-to-transmit state, green light is activated. This dynamic approach optimizes power consumption by activating only the necessary light source for each phase while maintaining simple control logic that automatically adapts to communication state changes.
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 users to visually recognize data transmission speed, reduce power consumption by disabling unnecessary light sources, and secure better communication channels by intuitively knowing alignment states and channel qualities through color-based intuitive information transmission.
Implementation Method 1
a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths
Implementation Method 2
Visible light is light having a wavelength in a range that is visible to the human eye among electromagnetic waves, in which the wavelength of the visible light is in the range of 380 to 780 nm
Implementation Method 3
The receiving unit is constituted by a photo detector (PD) converting the signal of the visible light band into an electrical signal
Data Source
AI summary
There is disclosed a visible light communication technology capable of intuitively recognizing a transmission speed, an alignment status, a communication status, or a transmission rate. A visible light communication apparatus according to an embodiment of the present invention includes: a light source selecting unit selecting at least one light source of a plurality of light sources generating lights having different wavelengths by considering intuitive information distinguished depending on a wavelength in a visible light band; and a visible light communication unit performing visible light communication by at least one selected light source to allow the intuitive information to be recognized by a color corresponding to at least one selected light source. Accordingly, a user using the visible light communication can intuitively know an optimal communication status or transmission speed.