Digital Signage Light Code Masking for Directional Data Transmission
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Solution Overview
Problem
Current digital signage systems face challenges in providing both display and information transmission functions without increasing costs, as they lack directionality in information transmission and require multiple backlights to display multiple advertisements, which is costly and inefficient.
Innovation Solution
A communication system that incorporates a display device with a light code module, masks positioned on the panel, and a user device with a camera, allowing the user device to capture light code signals combined with mask signals to obtain codes and display corresponding service content, thereby enabling both display and information transmission functions without the need for multiple backlights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple backlights are used to send multiple groups of visible light signals simultaneously, then multiple advertisements can be displayed, but hardware cost increases and overall hardware architecture needs to be redesigned
Solution Approach 1:
The patent segments the display area into multiple regions, with each region capable of displaying different advertisements simultaneously. The controller divides the display content into multiple groups and assigns them to different regions, allowing multiple advertisements to be shown without adding physical backlights. This spatial segmentation resolves the contradiction by achieving multi-advertisement display through software-controlled region division rather than hardware multiplication.
Solution Approach 2:
The patent implements dynamic switching between different advertisement groups by controlling the display timing and region allocation. The controller can dynamically adjust which advertisements are displayed in which regions based on timing signals, allowing the same hardware to flexibly display different combinations of advertisements at different times, thereby achieving versatility without increasing hardware complexity.
2Ease of operation
If Bluetooth wireless communication is used for interaction between smartphones and digital signages, then wireless communication is achieved, but directionality in information transmission is lacking
Solution Approach 1:
The patent introduces a camera as an intermediary device that captures light signals emitted by the display. The light signals carry encoded information that is then decoded by the smartphone camera, creating a unidirectional information transmission path from display to smartphone. This intermediary mechanism adds directionality to the communication, complementing the bidirectional Bluetooth communication and resolving the information loss regarding transmission direction.
3Device complexity
If a single backlight is used to send visible light signals, then hardware cost is reduced, but only a single advertisement can be displayed at a time
Solution Approach 1:
The patent makes the single backlight and display system universal by enabling it to display multiple different advertisements through software control. The controller manages multiple advertisement groups and switches between them, allowing the same hardware to serve multiple advertising purposes at different times. This multi-functionality approach resolves the contradiction by achieving versatile advertisement display capability without requiring multiple backlights or complex hardware modifications.
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 solution allows for directionally precise information transmission using visible light, enabling multiple advertisements to be displayed on a single panel without increasing hardware costs, improving the efficiency of digital signage systems by allowing users to choose and view service content on their devices.
Implementation Method 1
a light code module providing a light code signal to the panel
Implementation Method 2
the camera of the user device captures the light code signal plus the first mask signal or the second mask signal from the panel
Data Source
AI summary
A communication system and method thereof are provided, which includes: providing a first mask, a second mask, a user device having a screen and a display device having a light code module and a panel, wherein the first mask and the second mask are positioned at different positions of the panel, respectively; providing a light code signal to the panel by the light code module, and providing a first mask signal and a second mask signal by the first mask and the second mask, respectively; and capturing the light code signal plus the first mask signal or the second mask signal from the panel by the user device to obtain a first code according to the combination of the light code signal and the first mask signal or obtain a second code according to the combination of the light code signal and the second mask signal.