Variable Display for Smart Packaging Using Passive Optical Reflection
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Solution Overview
Problem
Existing smart labels and packaging technologies face challenges in providing reliable, low-cost, and low-power methods for information transfer, especially in perishable products, due to limitations in energy efficiency, cost, and practicality of industry-standard RF transmitters, LCDs, and enzymatic displays.
Innovation Solution
The integration of silicon-based circuits, ink-jet printing, and electrochemical or electromechanical components on PET substrates to create low-power, bi-stable display systems that can dynamically update information based on environmental conditions, using sensors, controllers, and display drivers to modify the appearance of variable display elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If industry standard RF transmitters are used for information transfer, then machine-readable information can be transmitted, but energy consumption is high and they are not practical for extended use without additional energy requirements
Solution Approach 1:
The display system uses passive optical reflection and human visual detection instead of active RF transmission, allowing the label to communicate information without external energy input. The system serves itself by utilizing ambient light and the consumer's existing visual capability rather than requiring powered transmitters.
Solution Approach 2:
The patent replaces electronic RF transmission systems with an optical-mechanical display system using micro-mirrors and reflective surfaces. This substitution eliminates the need for RF energy transmission while maintaining information transfer capability through visual display.
2Adaptability or versatility
If LCD displays are used for information display, then both machine and human-readable information can be shown, but they are constrained by useful operating temperature range and energy consumption
Solution Approach 1:
The patent changes the fundamental operating parameters of the display system by using passive optical reflection instead of active liquid crystal modulation. This allows the display to function across extreme temperature ranges without the thermal constraints that limit LCD operation, while maintaining versatility in displaying both machine and human-readable information.
3Extent of automation
If fully custom Application Specific ICs are used for smart label integration, then information processing capability is improved, but the cost of goods is too high for typical case-ready packaging situations
Solution Approach 1:
The patent extracts the complex electronic processing requirements from the label system, retaining only the essential sensing and display functions. By removing the need for custom ASICs and complex electronics, the system achieves high automation capability through simple optical-mechanical components that can be manufactured at low cost for case-ready packaging.
Solution Approach 2:
The patent employs inexpensive, simple optical and mechanical components that can be manufactured at very low cost, making the system economically viable for disposable packaging applications where custom ASICs would be prohibitively expensive.
4Ease of operation
If enzymatic displays are used for event indication, then human-readable information can be provided, but they provide only a general indication without variations or details
Solution Approach 1:
The patent divides the display into multiple independently controllable segments or regions, each capable of displaying different information. This segmentation allows the system to provide detailed, varied information beyond general event indication, while maintaining the simplicity and ease of operation of enzymatic trigger mechanisms.
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 approach enables cost-effective, low-power, and reliable information transfer in smart labels and packaging, allowing for accurate tracking of product freshness and spoilage, while reducing energy consumption and operational costs.
Implementation Method 1
The variable display element comprises an electrochemical material configured to change optical characteristics in response to the electronic control signal
Data Source
AI summary
Embodiments of the present application relate generally to methods and apparatus for relating information in a form either machine-readable, human-readable, or some combination thereof. More particularly, although not exclusively, these embodiments are concerned with the display of information on a smart active label or smart packaging where low power and low cost are significant considerations. In some embodiments, display methods are based on electronic, electromechanical, electrochemical, and combinations thereof configured or manufactured using printing techniques, micro-electromechanical system (MEMS) techniques, or combinations thereof to achieve high reliability, low cost, and low activation energies. The embodiments described above can provide an accurate and low-cost apparatus and method for relating the information obtained by smart active labels and smart packages.