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

Method for controlling oblique of optical disk device

A technology of tilt control and optical disc device, which is applied in optical recording/reproduction, head configuration/installation, instruments, etc., and can solve problems such as focal length and tracking servo action errors

Inactive Publication Date: 2006-07-05
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, if image 3 As shown, when recording data on an optical disc applicable to defect management (Defect Management), for example, when recording data on optical discs such as rewritable DVD-RAM and rewritable BD-RE (BD Re writable) , when the dynamic tilt control method is applied, in order to record the data not recorded in the defect area by the spare area (SA: Spare Area) instead of (Replacement) records, it is necessary to repeatedly random access (RandomAccess) the above spare area and data area to select and apply the corresponding Record positions (Rec1, 2, 3) corresponding to different tilt offset values ​​(for example: Tilt_Offset #1, #2), which have fatal errors in focus and tracking servo actions due to sudden changes in tilt offset values The problem

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
  • Method for controlling oblique of optical disk device
  • Method for controlling oblique of optical disk device
  • Method for controlling oblique of optical disk device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] Hereinafter, embodiments of the tilt control method of the optical disc device of the present invention will be described in detail with reference to the accompanying drawings.

[0030] Figure 4 is a schematic configuration diagram of an optical disc device to which the present invention is applied. For example, an optical disc device such as an optical disc drive used in connection with a host 100 such as a personal computer is composed of the following parts: a laser diode (LD1) 21 for a digital video disc including a focal length lens 20; a laser diode (LD2) 22 for an optical disc; A splitter 23 ; an optical pickup of a photodetector (PD) 24 ; an LD driver 25 ; an RF detection unit 26 ; an MPP detection unit 27 ; a microcomputer 29 ; a servo unit 28 ;

[0031] On the other hand, the RF detection unit 26 calculates the signals (Sa, Sb, Sc, Sd) respectively output from the photodetectors 24 divided into four regions (A, B, C, D), and passes the RF signal (RF = Sa+Sb...

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 relates to an inclined control method for a CD device, comprising: after detecting optimum inclined offset values in different recording position on the radius of a CD, respectively, calculating the difference values between inclined offset values; according to the difference values, selecting applicable dynamic inclined control mode or switching it to applicable static inclined control mode. As the defect management is made on the type of a CD in the CD device and the host computer, applicable static inclined control mode is selected to keep the stability of focusing and tracking servo action. The invention can achieve an effect of keeping stable focusing and tracking servo action.

Description

(1) Technical field [0001] The present invention relates to a tilt control method of an optical disc device, and more particularly relates to a disc defect management ( Defect Management), an invention of a tilt control method in an optical disc device that can choose to apply a static tilt control method or a dynamic tilt control method. (2) Background technology [0002] It is constantly being widely popularized, and the widely used optical discs include CD (CD) series and digital video disc (DVD) series. The Blu-ray Disc (BD: Blu-ray Disc) series of optical discs has been launched into the market after continuous research and development, and is expected to be widely used. For example, the above-mentioned series of CDs include CD-ROMs specially used for duplication, CD-Rs that can be written once, and CD-RWs that can be rewritable many times. The above-mentioned series of digital video discs include DVD-ROM specially used for duplication, DVD-R written once, DVD-RW and ...

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): G11B7/09G11B7/095
Inventor 尹汝翰
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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