Phosphorescent Packaging Material Backlighting Graphics
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Solution Overview
Problem
Current packaging materials that incorporate phosphor for glow-in-the-dark properties lack a balanced combination of attributes, failing to effectively backlight graphics in low-light conditions while maintaining visibility in frontlit states.
Innovation Solution
A packaging material structure comprising an outer web, an inner web, and an intermediate layer with phosphor, where the phosphor acts as an internal light source, allowing graphics to be backlit in darkness and frontlit in natural or artificial light, with variations in color and hue between states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If phosphor is included in printed ink of packaging materials, then the phosphor can glow in the dark, but the packaging material fails to provide a balanced combination of properties for effective backlighting in low-light conditions
Solution Approach 1:
The packaging material is divided into distinct functional layers: an outer web with graphics, an intermediate layer containing phosphor, and an inner web. This segmentation allows each layer to perform its specific function optimally - the phosphor layer provides glow while the outer web maintains graphic visibility, resolving the contradiction between glow intensity and property balance.
Solution Approach 2:
The intermediate layer acts as a mediator between the outer web and inner web, specifically positioned to contain the phosphor. This intermediary layer enables the phosphor to function as an internal light source that backlights the graphics without compromising the structural integrity or visual properties of the packaging material.
2Illumination intensity
If phosphor is positioned to backlight graphics in darkness, then visibility of graphics is enhanced, but the packaging material structure becomes more complex
Solution Approach 1:
The phosphor-containing intermediate layer is merged with the bonding layer that joins the outer and inner webs. This combination achieves dual functionality - both bonding the layers together and providing phosphorescent backlighting - thereby enhancing graphic visibility without proportionally increasing structural complexity.
Solution Approach 2:
The intermediate layer is designed to serve multiple functions simultaneously: it bonds the outer and inner webs together, contains the phosphor for glow-in-the-dark properties, and acts as a light-diffusing layer. This multi-functionality resolves the contradiction by achieving backlighting enhancement without requiring separate dedicated components.
3Duration of action of stationary object
If the packaging material is designed for sustained phosphorescence, then glow duration is extended, but the phosphor activation requires sufficient light exposure which may not be available in low-light conditions
Solution Approach 1:
The phosphor in the intermediate layer is pre-positioned and pre-activated during normal use when ambient light is available. The packaging material is designed to accumulate sufficient light energy in the phosphor during typical viewing conditions, so that when darkness falls, the phosphor is already charged to provide extended glow without requiring additional activation light in low-light environments.
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 packaging material provides sustained phosphorescence for extended periods, enabling graphics to be visibly observed in both backlit and frontlit conditions, enhancing visibility and aesthetic appeal in low-light environments.
Implementation Method 1
the phosphor in the ink glows in the dark
Implementation Method 2
the phosphor can function as an internal, phosphorescent light source
Data Source
AI summary
An inner layer of packaging material includes phosphorescent material, and the packaging material is configured so that graphics of the packaging material are backlit by light emitted from the phosphorescent material. The packaging material can be a laminate, and the inner layer including the phosphorescent material can be a tie layer of the laminate.