Optical Storage Medium Detectable Marks for Media Type Identification
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical devices capable of reading multiple types of optical storage media face increased start-up times due to the need to adjust optical systems for different media types, such as CDs and Blu-rays, which require distinct numerical aperture and laser diode wavelength parameters.
Innovation Solution
Incorporating optically detectable marks on optical storage media that can be read by a wide range of optical systems, regardless of focus and radial position, to directly determine the media type without a trial-and-error approach, allowing for efficient identification and conveying additional necessary information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an optical device supports multiple media types with different parameters, then the adaptability is improved, but the start-up time increases due to trial-and-error adjustment
Solution Approach 1:
The patent applies preliminary action by pre-placing optically detectable marks on the optical storage medium that indicate the media type before the reading operation begins. These marks are positioned in a location and format that allows the optical device to identify the correct media type immediately upon insertion, eliminating the need for trial-and-error parameter adjustments and reducing start-up time while maintaining multi-format compatibility
2Loss of time
If optically detectable marks are placed on the optical storage medium, then the start-up time is reduced, but the manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by separating the media identification function from the data storage function. The optically detectable marks are placed in a specific region (such as the lead-in area or as an annular mark) distinct from the data storage area, allowing the marks to be added during manufacturing without complicating the overall disc structure or data encoding processes
Solution Approach 2:
The patent applies universality by designing optically detectable marks that can be implemented across different optical storage media types (CDs, DVDs, Blu-ray) using similar manufacturing techniques. The marks serve multiple purposes: identifying media type, indicating focus requirements, and providing radial position information, thereby reducing start-up time without requiring complex media-specific manufacturing processes
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
This solution reduces start-up time by enabling immediate identification of the optical storage medium type, regardless of system parameters, and can be used across various media types like CDs, DVDs, and Blu-rays, enhancing compatibility and efficiency.
Implementation Method 1
optically detectable marks readable under sub-optimal focus and radial position conditions
Data Source
AI summary
Optically detectable marks readable by a wide range of optical systems are included on an optical storage medium. Among other uses, the marks may be used to determine the type of the optical storage medium in an optical device capable of reading multiple types of optical storage media.