Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical disc and optical disc device

An optical disc device and optical disc technology, which are applied to optical recording heads, optical recording carriers, recording/reproducing by optical methods, etc., can solve the problems of not being able to obtain the optimum value of the recording power of the L0 layer, and reduce the recording capacity, Reduce the effect of zooming out

Inactive Publication Date: 2009-11-11
PANASONIC CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is considered that even if the recording of the L1 layer does not affect the recording quality of the L0 layer under the condition of the recording power Pwo1, at the above-mentioned test recording power, the light beam is subjected to intensity changes when passing through the L1 layer. The impact of the influence, can not get the best value of the recording power of the L0 layer (set as Pwo0)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optical disc and optical disc device
  • Optical disc and optical disc device
  • Optical disc and optical disc device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0041] figure 1 The structure of the optical disc 101 according to the first embodiment of the present invention is shown, and especially the structure of the first information recording layer is shown.

[0042] On the optical disc 101, a plurality of tracks 102 are formed concentrically. Alternatively, a single track 102 may be formed in a spiral shape on the optical disc 101, or a plurality of tracks 102 may be formed in a spiral shape.

[0043] The area of ​​the optical disc 101 includes a pre-recorded area 103 and a recordable area 104 .

[0044] Various parameters necessary for accessing the optical disc 101 are stored in the pre-recorded area 103 .

[0045] In the recordable area 104, recording learning and user data recording and reproduction are performed.

[0046] figure 2The structure of the single-sided two-layer optical disc of the present invention is shown.

[0047] exist figure 2 Among them, 201 is a substrate, 202 is a first information recording layer,...

Embodiment approach 2

[0072] Figure 8 An arrangement diagram showing the radial positional relationship of the main parts of the optical disc area in another embodiment of the present invention.

[0073]In the figure, the upper part shows the protection area 503a of the first information recording layer, the control data area 504a, the protection area 505a, the first test area 506a, the buffer area 507a, the drive management information area 508a, the buffer area 509a, the user data recording area area 510a and second test area 515a. In the figure, the lower part shows the protected area 503b of the second information recording layer, the third test area 504b, the reserved area 505b, the protected area 506b, the reserved area 507b, the buffer area 508b, the reserved area 509b, the buffer area 510b, and the user data recording. area 511b and fourth test area 515b. Other structures and contents of each area are related to image 3 Since the two-layer optical disc of the illustrated embodiment 1 i...

Embodiment approach 3

[0087] use Figure 9 as well as Figure 10 , an optical disc device for recording with the optical disc described in the first or second embodiment will be described.

[0088] Figure 9 It is a block diagram showing the outline of the optical disc device 600 .

[0089] exist Figure 9 Among them, 601 is an optical disc. The optical disc 601 has the structure described in the first or second embodiment. Among them, the optical disc device 600 can record on an optical disc having a conventional structure, for example, a single-layer optical disc.

[0090] 602 is a semiconductor laser, 603 is a collimate lens, 604 is a beam splitter, 605 is a condensing mechanism, 606 is a condenser lens, 607 is a light detection mechanism, 608 is a reproduction signal calculation mechanism, and 609 is a focus control mechanism , 610 is a tracking control mechanism, 611 is an actuator, 612 is a controller, 613 is a laser driving mechanism, and 615 is a signal processing unit.

[0091] Here...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention aims to provide a recordable dual-layer optical disc which allows precise recording learning on both layers. A first information recording layer located further from the light incidence side includes a read-only control data area (304a), a first test area (306a), and a second test area (315a). A second information layer located closer to the light incidence side includes a third test area (304b) located at a position opposite to the control data area (304a), and a fourth test area (315b) located at a position opposite to the second test area (315a).

Description

[0001] This application is a divisional application of an invention patent application with an application date of September 26, 2005, an application number of 200580018569.X, and an invention title of "optical disc and optical disc device". technical field [0002] The present invention relates to an optical disc having two information recording layers and a test area on each layer. In addition, the present invention also relates to an optical disc device that records the optical disc. The test area is used to adjust various conditions for driving, for example, to learn recording conditions. Background technique [0003] In recent years, with the continuous development of higher density and larger capacity of optical discs, it has become particularly important to ensure the reliability of optical discs. In order to ensure this reliability, in an optical disc apparatus that records or reproduces such an optical disc, recording learning is performed to obtain conditions for ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/00G11B15/00G11B7/004G11B7/12G11B7/007
CPCG11B2007/0013G11B7/24038G11B7/00736G11B7/007
Inventor 石田隆
Owner PANASONIC CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com