Electronic Shelf Label Misplacement Detection With Auto Image Switching

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Solution Overview

Problem

Electronic shelf labels (ESLs) in supermarkets can be inadvertently or deliberately moved from their intended positions, leading to confusion or misunderstandings due to continued display of previous image content.

Innovation Solution

An electronic shelf label system with a detector unit, such as a photodiode, tilt sensor, or proximity sensor, autonomously detects incorrect positioning and changes the image content without server intervention, using a long-term energy storage device and communication module for wireless communication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If ESLs are removed or moved from their intended position, then the ESLs can be reused or repositioned, but the image content continues to display incorrectly causing customer confusion

Engineering Contradiction:

Improverepositioning capabilityVSAvoiddisplay accuracy

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism where the ESL continuously monitors its positioning status through detector units (photodiodes, tilt sensors, proximity sensors) and automatically adjusts its operation based on the detected position. When the ESL detects it has been moved from its intended position, it receives updated image content from the server reflecting its new location, ensuring display accuracy is maintained despite repositioning.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The ESL performs self-diagnosis of its positioning status using integrated detector units and autonomously determines whether it has been moved. The system automatically triggers image content updates without requiring manual intervention, enabling the ESL to serve itself in maintaining display accuracy when repositioned.

Inventive Principle:

Principle #25Self-service

2Reliability

If the ESL autonomously detects incorrect positioning and changes image content, then display accuracy is improved, but energy consumption increases due to additional detection and communication operations

Engineering Contradiction:

Improvedisplay accuracyVSAvoidenergy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The ESL employs periodic detection cycles where the detector unit checks positioning status at predetermined intervals rather than continuously. The system alternates between active detection phases and low-power sleep modes, triggering image content updates only when positioning changes are detected, thereby reducing overall energy consumption while maintaining display accuracy.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The detector unit operates continuously at low power to monitor positioning status, while the high-power display and communication functions operate continuously only when needed. This continuous low-level monitoring ensures immediate detection of positioning changes without requiring continuous high-energy operation of the entire system.

Inventive Principle:

Principle #20Continuity of useful action

3Device complexity

If the ESL requires server intervention to detect and correct positioning errors, then system complexity is reduced, but response time increases and customer confusion persists longer

Engineering Contradiction:

Improvesystem complexityVSAvoidresponse time

Core Design Contradiction:

Device complexityVSLoss of time

Solution Approach 1:

The ESL is pre-equipped with detector units and the positioning detection logic is pre-programmed into the device. When positioning changes occur, the ESL can immediately detect and respond without waiting for server initiation, reducing response time while maintaining manageable system complexity through standardized detection algorithms.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The server acts as an intermediary that provides updated image content based on ESL-reported positioning status, rather than directly controlling each ESL's detection process. This architecture distributes complexity appropriately - the ESL handles local detection and the server handles centralized content management - enabling fast local response while maintaining system-wide coordination.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

The system effectively and efficiently adjusts the image content based on correct positioning, reducing customer confusion and energy consumption by autonomously detecting and correcting misplacement without requiring continuous server communication.

Implementation Method 1

the detector unit comprises a photodiode

Methodology Applied

Scientific EffectPhotoelectric Effect: Photoelectric Effect

Data Source

PatentUS20250378776A1Electronic shelf label with action triggering

Publication Date: 2025.12.11 VUSIONGROUP GMBH

AI summary

An electronic shelf label, which comprises:a display unit, which is designed for displaying image content, anda communication module, which is designed for wireless communication for the purpose of receiving image data, which represent the image content, and for transferring the image data to the display unit,whereina detector unit is provided, which is designed for detecting an incorrect positioning, which differs from a desired positioning, of the electronic shelf label, and for outputting an action signal when the incorrect positioning is detected, wherein the detector unit comprises a photodiode, and whereinthe electronic shelf label is designed to change the image content when the action signal is present.