Optical Traffic Signal Detection for Dynamic Ad Display
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Solution Overview
Problem
Conventional advertisement display systems for traffic signals and railway crossing alarms lack a synchronized method to switch advertisement content based on the lighting or blinking conditions, posing safety risks and inefficiencies due to the difficulty in connecting electric cables or attaching sensors to these signals.
Innovation Solution
An advertisement display system that includes a photograph unit, an image display unit, an optical sensor, and a relay unit, which takes images of traffic signals or railway crossing alarms, detects signal conditions, and correlates them with pre-stored advertisement content to display relevant information, allowing for dynamic switching without direct electrical connections or sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an advertisement display system is directly connected to traffic signals using electric cables or sensors, then synchronization with signal conditions is achieved, but safety risks and installation complexity increase due to the difficulty of connecting to traffic signals
Solution Approach 1:
The patent introduces a photograph unit as an intermediary device that captures images of traffic signals from a distance, avoiding direct physical connection. The image processing unit then analyzes these images to determine signal states, enabling synchronization without cables or sensors attached to the traffic signal infrastructure, thus eliminating safety risks while maintaining reliable synchronization.
Solution Approach 2:
The patent replaces the mechanical/electrical connection system (cables and sensors) with an optical system. Instead of physically connecting to the traffic signal, the system uses a camera to photograph the signal and image processing to detect its state, substituting a mechanical connection with a non-contact optical detection method that eliminates safety hazards.
2Productivity
If advertisement content is displayed during traffic signals, then advertising effectiveness increases, but driver and pedestrian safety may be compromised by distracting attention
Solution Approach 1:
The patent dynamically adjusts advertisement display based on real-time traffic signal conditions and vehicle/pedestrian states. The system controls the display unit to show advertisements only during appropriate signal phases (e.g., red light for pedestrians) and adjusts content based on whether vehicles are passing or stopped, making the display adaptive to safety conditions while maximizing advertising effectiveness during safe time windows.
3Loss of information
If advertisement content is switched based on traffic signal conditions, then relevance to viewers is improved, but system complexity increases due to the need for signal detection and content management
Solution Approach 1:
The patent makes the display unit multi-functional by integrating both traffic signal detection capabilities and advertisement content management in a single device. The display unit not only shows advertisements but also functions as the output interface for the image processing unit's signal detection results, eliminating the need for separate detection and control systems and reducing overall system complexity while maintaining high information relevance.
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 system enables effective and safe advertisement display by correlating content with signal conditions, providing high advertising effectiveness while ensuring traffic safety by adjusting the amount and type of information displayed based on the viewer's status (passing or waiting) without requiring complex computer systems.
Implementation Method 1
an optical sensor for detecting display condition of the image display unit
Data Source
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AI summary
An advertisement display system includes a means for taking a photograph of a signal light of a signal 5 such as a traffic signal or an alarm for a railway crossing by a photograph unit 1, an analysis means for analyzing the signal condition such as lighting or blinking of the signal light from image data thus photographed by the photograph unit 1 by a computer 2, and a means for displaying an advertisement display information which is stored in advance in the computer 2 or a display unit 3 in conjunction with the lighting or blinking condition of the signal light analyzed by the analysis means and displays a display body having a content correlated with the signal condition of the signal 5 on the display unit 3.