Transaction Display Obstruction Detection Using Luminance Sensors

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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 detection.

Innovation Solution

Incorporation of photosensitive sensors to detect changes in luminance on the display screen, enabling the device to identify obstructions and disable operations to prevent fraudulent activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional fraud detection methods are used without photosensitive sensors, then the device can process transactions normally, but it is vulnerable to obstructions like stickers that obscure legitimate QR codes leading to fraudulent transactions

Engineering Contradiction:

Improvetransaction securityVSAvoiddetection system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

A photosensitive sensor is introduced as an intermediary component between the display screen and the transaction processing system. The sensor detects luminance changes on the display surface and provides obstruction information to the processor, enabling fraud prevention without requiring complex image recognition or camera systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent replaces complex mechanical or optical inspection systems with a simple photosensitive sensor that measures luminance. This substitution uses optical properties (light detection) rather than mechanical scanning or complex image processing, simplifying the detection system while maintaining effectiveness.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If continuous monitoring of the display screen is performed to detect obstructions, then fraudulent transactions can be prevented, but computing and network resources are consumed

Engineering Contradiction:

Improvefraud detection capabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The system performs periodic luminance measurements at specific intervals during transaction processing rather than continuous monitoring. The processor triggers photosensitive sensor readings at key moments (e.g., when QR code display is expected), reducing power consumption while maintaining effective fraud detection capability.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The photosensitive sensor autonomously detects luminance changes and generates obstruction indicators without requiring active processing or external intervention. The sensor continuously monitors and passively provides data to the processor only when changes occur, enabling energy-efficient operation.

Inventive Principle:

Principle #25Self-service

3Difficulty of detecting and measuring

If photosensitive sensors are added to detect obstructions, then obstruction detection capability is improved, but the device complexity increases

Engineering Contradiction:

Improveobstruction detection capabilityVSAvoidsensor system complexity

Core Design Contradiction:

Difficulty of detecting and measuringVSDevice complexity

Solution Approach 1:

The patent extracts only the essential detection function (luminance measurement) from complex image recognition systems. By using a simple photosensitive sensor that measures only light intensity rather than full-color image data, the system achieves effective obstruction detection with minimal hardware complexity.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The system changes the detection parameter from complex multi-dimensional image analysis to simple one-dimensional luminance measurement. This parameter simplification allows effective obstruction detection using basic photosensitive sensors rather than requiring complex camera and image processing systems.

Inventive Principle:

Principle #35Parameter 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

Efficient obstruction detection conserves computing and network resources by preventing fraudulent transactions and minimizing power consumption.

Implementation Method 1

at least one photosensitive sensor configured to detect a luminance of a viewing surface of the display screen

Methodology Applied

Scientific EffectLuminance detection: Photoelectric Effect

Data Source

PatentUS20260011221A1Obstruction detection of a transaction device display screen

Publication Date: 2026.01.08 CAPITAL ONE SERVICES LLC

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.