Laser Reactive Media for Optical Disc Labeling
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Solution Overview
Problem
Existing methods for labeling writable optical discs are either damaging, complex, or inefficient, such as using marker pens, separate printable labels that can detach, or the Lightscribe system which requires specialized drives and is limited to monochrome and takes too long.
Innovation Solution
An optical disc with a laser-reactive label writing side that uses a standard optical disc drive for writing, employing a laser-reactive material that changes color permanently under laser exposure, allowing for color image creation with high resolution, and software to convert label images into data files suitable for writing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate printable label is affixed to the optical disc, then the label can be clearly visible and attractive, but the label may become detached or jam the optical disc drive
Solution Approach 1:
The patent combines the label and the optical disc into a single integrated structure. The label layer is applied directly to the disc substrate, eliminating the need for separate attachment. This merging ensures the label cannot detach while maintaining clear visibility and attractiveness, directly resolving the contradiction between label reliability and operational simplicity.
Solution Approach 2:
The optical disc drive is designed to perform multiple functions: it can write data to the disc and simultaneously write labels to the label layer using the same or integrated laser mechanisms. This multi-functionality eliminates the need for separate labeling equipment, resolving the contradiction by making the labeling process as reliable and integrated as the data writing process.
2Reliability
If the Lightscribe system is used to write labels, then labels can be written using a laser, but the process takes 20 to 40 minutes which is much longer than data writing time
Solution Approach 1:
The patent modifies the laser writing parameters including power level, pulse duration, and scanning speed to optimize the label writing process. By adjusting these parameters, the system achieves permanent label writing in a fraction of the time required by conventional Lightscribe systems, resolving the contradiction between label permanence and writing speed.
Solution Approach 2:
The labeling process uses periodic laser pulses rather than continuous illumination. This periodic action with optimized pulse timing and duration enables rapid material transformation for permanent labeling while significantly reducing total writing time compared to continuous low-power writing methods used in conventional systems.
3Reliability
If the Lightscribe system is used, then labels can be written with a laser, but the system requires specialized Lightscribe-enabled drives and is limited to monochrome
Solution Approach 1:
The patent designs the optical disc and drive system to be universally compatible. Standard optical disc drives can write to both the data layer and the label layer without requiring specialized Lightscribe-enabled hardware. The system uses conventional laser wavelengths that work with standard drive optics, enabling broad compatibility while maintaining reliable label writing capability.
Solution Approach 2:
The label layer uses composite materials with specific optical properties that respond to conventional laser wavelengths. These materials can be transformed by standard drive lasers to create permanent labels, and the composition allows for color variation through different material formulations or layer structures, eliminating the monochrome limitation while maintaining drive compatibility.
4Ease of operation
If marker pen is used to mark the disc, then the disc can be identified, but the marking can damage the disc and does not provide clear or attractive labels
Solution Approach 1:
The patent replaces the mechanical marker pen system with an optical laser writing system. Instead of physically contacting and potentially damaging the disc surface with ink, the laser optically transforms the label layer material to create permanent, high-quality labels. This substitution eliminates disc damage while providing clear, attractive labeling, resolving the contradiction between operational simplicity and label quality.
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 efficient, attractive, and durable labeling of optical discs using standard drives, without the need for specialized equipment, and allows for color labels to be created quickly, addressing the limitations of existing methods.
Implementation Method 1
a laser reactive material for forming the label image
Implementation Method 2
A laser writing head is operable to emit a laser beam to vaporise portions of the laser reactive material
Implementation Method 3
the laser reactive material exhibits different reactions depending on the frequency of laser light received
Data Source
AI summary
An optical disk label writing method for writing a label on an optical disc uses a similar writing operation to that used to write data to the disc. The disc has a label side including a laser reactive material for forming the label image, and a tracking format that can be tracked by a writing laser in a similar way to a writing operation. A computer program is provided for converting a label image to a disk image file for writing to the label side.