ESL Power Management via Periodic Data Sync

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Solution Overview

Problem

Electronic shelf label (ESL) systems face frequent battery replacement due to rapid battery drainage from frequent communications with servers, leading to inefficient power management in retail environments with thousands of items.

Innovation Solution

Implementing a power management system that minimizes communication frequency between ESL labels and the server by programming specific communication times and channels, using timers to optimize data updates and adjust communication schedules based on actual data changes, and allowing for ad-hoc updates as needed.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If ESL labels communicate frequently with the server to maintain data accuracy, then data freshness is improved, but battery life deteriorates due to rapid power drainage

Engineering Contradiction:

Improvedata freshnessVSAvoidbattery life

Core Design Contradiction:

Loss of informationVSDuration of action of moving object

Solution Approach 1:

The ESL labels communicate with the server at predetermined periodic intervals rather than continuously. Each ESL is programmed with specific communication times and channels, waking up periodically to exchange data and then returning to sleep mode. This periodic communication pattern maintains data freshness while significantly reducing power consumption compared to continuous communication.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The communication schedule is dynamically adjusted based on actual data changes. The system monitors whether price or product data has changed since the last communication, and only initiates communication when changes are detected. This dynamic adaptation prevents unnecessary communications, extending battery life while ensuring data accuracy is maintained when changes occur.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If ESL labels use battery power for portability and flexibility, then ease of installation is improved, but operational complexity increases due to frequent battery replacement

Engineering Contradiction:

Improveease of installationVSAvoidoperational complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The ESL labels are pre-programmed with communication schedules, timing information, and operational parameters before deployment. This preliminary configuration allows the labels to autonomously manage their communication cycles and power consumption without requiring ongoing manual intervention, reducing operational complexity despite using replaceable batteries.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The ESL labels autonomously manage their own power consumption by implementing self-regulating communication cycles. The labels monitor their own battery status and data change states, automatically initiating communications only when necessary and returning to sleep mode otherwise. This self-service capability minimizes the need for manual battery replacement and system intervention.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS8912886B2Power management system for electronic shelf labels and the like

Publication Date: 2014.12.16 OPTOELECTRONICS CO LTD

AI summary

A power management system is disclosed in which ESL labels communicate with a server through a base station. The frequency and times at which each ESL label communicates with the server is optimized for the minimum communication necessary to provide up to date pricing and related information, and to simultaneously minimize consumed battery power for the ESL labels. The base stations and servers for the system are preferably operated from hard wired power.