Transaction Device Display Luminance Sensing for Obstruction Detection
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Solution Overview
Problem
Transaction devices, such as ATMs and kiosks, are vulnerable to tampering and vandalism, particularly through obstructions like stickers that obscure legitimate QR codes, leading to fraudulent transactions and resource-intensive fraud identification and correction.
Innovation Solution
Incorporation of photosensitive sensors to detect changes in luminance on the display screen, enabling the transaction device to identify obstructions and disable operations to prevent fraudulent activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional display screens are used without obstruction detection, then the device structure remains simple, but the device is vulnerable to tampering and fraudulent transactions
Solution Approach 1:
A photosensitive sensor is introduced as an intermediary component between the display screen and the external environment. This sensor detects obstructions by measuring changes in light transmission, providing a security mechanism without requiring complex image processing systems or additional cameras.
Solution Approach 2:
The patent replaces complex mechanical or optical inspection systems with a simple photosensitive sensor that detects obstruction presence through luminance changes. This substitution simplifies the overall system while maintaining effective security monitoring.
2Reliability
If obstruction detection is implemented to prevent fraud, then fraudulent transactions are reduced, but computing and network resources are consumed
Solution Approach 1:
The display screen itself serves the dual function of both displaying information and detecting obstructions through its integrated photosensitive sensor. The system monitors its own output for changes in luminance, eliminating the need for separate detection systems that would consume additional resources.
Solution Approach 2:
The system detects obstructions by monitoring changes in the luminance parameter of the display screen output. This simple parameter change detection approach requires minimal computing resources compared to complex image analysis, as it only needs to track brightness variations rather than process visual images.
3Reliability
If continuous monitoring of display screen is performed, then obstructions are detected promptly, but power consumption increases
Solution Approach 1:
The photosensitive sensor operates periodically to detect changes in luminance rather than requiring continuous high-power monitoring. The system activates the sensor at appropriate intervals during display operations, maintaining obstruction detection capability while minimizing power consumption during non-critical periods.
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
Efficient obstruction detection conserves computing and network resources by preventing fraudulent transactions and reducing power consumption.
Implementation Method 1
at least one photosensitive sensor configured to detect a luminance of a viewing surface of the display screen
Data Source
AI summary
In some implementations, a transaction device may include a display screen, at least one photosensitive sensor configured to detect a luminance of a viewing surface of the display screen, and one or more processors. The one or more processors may be configured to monitor an output of the at least one photosensitive sensor, determine that the output is indicative of an obstruction on the display screen based on the output indicating a change to the luminance of the viewing surface of the display screen, and disable one or more operations of the transaction device based on determining that the output is indicative of the obstruction on the display screen.