RFID Label in Optical Data Carrier Recess
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Solution Overview
Problem
Optical data carriers with RFID labels face issues such as easy detachment, visibility, production complexity, and ineffective copy protection, leading to imbalances and unauthorized copying.
Innovation Solution
An annular recess on the data carrier substrate allows for precise positioning and hiding of the RFID label, which is covered using a print layer, lacquer, film, or additional substrate, ensuring the label is secure and unobtrusive, and integrating a unique identification sequence for enhanced security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RFID label is attached to the surface of the optical data carrier, then the RFID functionality is achieved, but the label becomes visible and can be easily removed by unauthorized persons
Solution Approach 1:
The RFID label is inserted into an annular recess formed in the substrate component, nesting the label within the substrate structure. This integration makes the label invisible when viewed from the front surface and prevents easy removal, as the label is physically contained within the recess rather than merely attached to the surface.
Solution Approach 2:
The RFID label is extracted from the conventional surface-attachment approach and placed into a dedicated recess structure. This extraction from the surface allows the label to be positioned within the substrate thickness, achieving both invisibility and secure integration.
2Reliability
If the RFID label is laterally arranged on the data carrier, then RFID functionality is achieved, but production complexity increases due to the need to avoid imbalances
Solution Approach 1:
The annular recess is positioned coaxially with the central hole of the optical data carrier, creating a symmetric arrangement that balances the overall structure. This symmetric placement of the RFID label within the recess eliminates imbalances and simplifies production, as no additional counterbalancing measures are required.
3Reliability
If copy protection is implemented through changes in data structures or physical structures, then copying difficulty increases, but playback compatibility may be impaired
Solution Approach 1:
An RFID label is introduced as an intermediary authentication mechanism that works in conjunction with the optical data carrier. The RFID label contains authentication data that can be read by playback devices to verify authenticity, providing copy protection without altering the physical structure or data encoding of the optical carrier itself, thus maintaining broad playback compatibility.
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The carrier has a disk-shaped substrate component (2) comprising a circular recess (4) extending orthogonal to a main surface of the component. A radio frequency identification (RFID) label (3) is laid and fixed in the recess by an adhesive layer. The recess with the label is covered by another disk-shaped substrate component, a lacquer coating, a printing layer (5`) and/or film. The recess has a center axis in a direction orthogonal to the main surface of the component. An independent claim is also included for a method for manufacturing an optical data carrier.