Thermochromic Code Symbol Layering for Compact Label Design
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Solution Overview
Problem
Conventional methods require a fixed distance between two QR codes on a printed material to prevent simultaneous recognition, leading to increased space usage and inefficiency in arranging code symbols.
Innovation Solution
A manufacturing method involving a base material with a first non-decolorable code symbol and a second thermochromic code symbol that can be decolored at a specific temperature, allowing the first symbol to be partly or entirely covered, enabling efficient arrangement and reversible visibility for information retrieval.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two QR codes are arranged at a fixed distance to prevent simultaneous recognition, then code reader reliability is improved, but the area required for arranging the codes increases
Solution Approach 1:
The patent applies thermochromic coloring material that changes color or becomes transparent at a particular temperature. The second code symbol is printed with this material so that it becomes transparent when heated, allowing the first code symbol to be readable. This dynamic optical property change enables reliable code recognition without requiring large separation distances between codes.
Solution Approach 2:
The patent changes the temperature parameter of the printing system to control the visibility of the second code symbol. By heating the printed material to a particular temperature, the thermochromic material transitions from colored to transparent state, thereby changing the optical parameters of the second code symbol and enabling selective readability of code symbols.
2Quantity of substance
If two different code symbols are printed on one printed material, then information storage capacity is improved, but the area required for arranging the codes increases
Solution Approach 1:
The patent merges multiple code symbols into a narrow range on the same printed material by using thermochromic materials. The second code symbol is printed over or adjacent to the first code symbol, and both can be read by changing the temperature state of the material, thereby combining multiple information storage functions in a compact area.
Solution Approach 2:
The patent adds the temperature dimension to the traditional two-dimensional code arrangement. By utilizing the thermochromic property that responds to temperature changes, the system creates a third dimension (temperature state) for controlling code visibility, allowing multiple codes to be arranged in a narrow spatial range without interfering with each other's readability.
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
Enables the aggregation of code symbols in a narrow range, reducing label size and loss, while allowing either symbol to be easily read by a code reader, preventing simultaneous recognition and allowing for reusability by temperature control.
Implementation Method 1
a second coloring material that is different from the first coloring material and decolorable at a particular temperature
Data Source
AI summary
A manufacturing method of a printed material that stores machine-readable information, includes forming, on a base material, a first layer including a first code symbol that is machine-readable and represents first information, using a first coloring material, and forming, on the first layer, a second layer including a second code symbol that is machine-readable and represents second information, using a second coloring material that is different from the first coloring material and decolorable at a particular temperature, such that the first code symbol is at least partly covered by the second coloring material.