Thermal Transfer Sheet Identification via Protective Layer Marks
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Solution Overview
Problem
Existing thermal transfer sheets require additional layers and processes for detection marks, increasing manufacturing costs and potentially affecting color properties in high-resolution printing.
Innovation Solution
A thermal transfer sheet with a protective layer containing an invisible light absorbing material and an identification mark in the form of recessed or protruding portions, allowing for detection without additional layers, and a thermal transfer printing apparatus that uses detectors to identify the sheet based on these marks, reducing production costs and maintaining color accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If detection marks are formed between dye layers using additional layers or processes, then identification capability is improved, but manufacturing cost increases and production complexity increases
Solution Approach 1:
The patent merges the identification function with the existing protective layer by forming detection marks directly on it using the same printing process that applies the protective layer. This eliminates the need for separate detection layers or additional printing steps, thereby reducing manufacturing cost while maintaining identification capability.
Solution Approach 2:
The protective layer is given dual functionality: it serves both as a protective coating and as a carrier for detection marks. By making the protective layer multi-functional, the patent eliminates the need for separate detection layers, reducing both manufacturing cost and production complexity.
2Measurement precision
If detection marks are formed by varying dye layer thickness, then identification capability is improved, but color properties in high-resolution printing deteriorate
Solution Approach 1:
The patent extracts the detection mark formation from the dye layer structure and places it on the protective layer instead. This separation ensures that variations in detection mark thickness or presence do not affect the dye layer's color properties, thereby maintaining high-resolution printing quality while enabling identification.
Solution Approach 2:
The protective layer acts as an intermediary carrier for detection marks, isolating the identification function from the dye layers. This intermediary role prevents any interference between detection mark formation and color printing, allowing both functions to operate independently without compromising each other.
3Measurement precision
If additional detection layers are added to the thermal transfer sheet, then identification capability is improved, but device complexity increases
Solution Approach 1:
The patent combines the detection mark carrier function with the protective layer, eliminating the need for separate detection layers. This merging reduces the number of layers and simplifies the overall structure of the thermal transfer sheet while maintaining identification capability.
Solution Approach 2:
The protective layer is designed to serve multiple purposes: protecting the dye layers and carrying detection marks. This multi-functionality reduces the total number of components needed in the thermal transfer sheet, thereby simplifying the device structure.
4Measurement precision
If detection marks are formed on base film by printing, then identification capability is improved, but image quality deteriorates due to scattered ink
Solution Approach 1:
The patent extracts the detection mark formation from the base film/dye layer printing process and relocates it to the protective layer application process. This separation prevents scattered ink from affecting the underlying dye layers, thereby maintaining image quality while enabling detection mark formation.
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 accurate identification of thermal transfer sheets, prevents color property changes in high-resolution printing, and reduces production costs by eliminating the need for additional detection layers.
Implementation Method 1
the protective layer contains an invisible light absorbing material
Data Source
AI summary
There is provided a thermal transfer sheet capable of being identified by a thermal transfer printing apparatus, as well as being capable of preventing color property changes in high-resolution printing and reducing production cost. The thermal transfer sheet 5 of an embodiment includes a dye layer 52 and a protective layer 54 on one surface of a substrate 50. The protective layer 54 contains an invisible light absorbing material and is provided with an identification mark 55 having at least one of a recessed portion and a protruding portion.