Unlock instant, AI-driven research and patent intelligence for your innovation.

Optical disc device and method for discriminating optical disc

A technology of optical discs and equipment, which is applied in the direction of optical discs, disc-shaped record carriers, and information recording on magnetic discs, and can solve problems such as complexity, unsatisfactory structure, and inability to use mechanical identification systems

Inactive Publication Date: 2004-10-13
SONY CORP
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this mechanical identification system cannot be used if the disc is not of the type enclosed in a cartridge and the disc itself is of the same size
[0008] In addition, if a

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 device and method for discriminating optical disc
  • Optical disc device and method for discriminating optical disc
  • Optical disc device and method for discriminating optical disc

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0046] The preferred embodiments for implementing the present invention will be described in detail below with reference to the accompanying drawings.

[0047] The present invention is applied to the optical disc device associated with CD and DVD. Before describing the optical disc device implementing the present invention, first, the structure of CD, CD-R and DVD will be explained based on FIG. 1. Here, CD, CD-R and DVD are all optical discs with a diameter of 12 cm.

[0048] Figure 1A , 1B And 1C illustrate the layered structure of the cross section of CD, CD-R, and DVD. As shown in these figures, the entire disc thickness of each of CD, CD-R, and DVD is approximately 1.2 mm.

[0049] in Figure 1A On the CD 100 shown, the disc substrate (transparent layer) 101 is molded from a transparent synthetic resin material, such as transparent polycarbonate resin, polyvinyl chloride or polypropylene resin, which has good light transmission. Resistance, mechanical abrasion resistance an...

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

A system controller (30) discriminates the kinds of a plurality of optical disks (D) having different numbers of signal recording layers based on a focus error signal generated by means of an RF block (21) from the output of a servo processor (31), which is outputted when the processor detects the reflected light of laser light from the signal surface of the disk (D), at the time of focusing the laser light on the signal surface of the disc (D) by displacing an objective lens in the direction of optical axis, while the signal surface of the disk (D) is irradiated with the laser light through the objective lens and sets the operation mode of the disks (D) in accordance with the kinds of the disks (D).

Description

technical field [0001] The present invention relates to an optical disc device capable of handling multiple types of optical discs, and a method for identifying optical discs. Background technique [0002] As an optical disc, a compact disc (CD) is widely used. For example, a CD-type optical disc is used in many fields, and it can be said that there is no field of music application that does not use an optical disc. CDs for music are generally designed to be playback-only media. However, a rewritable optical disc called compact disc-recordable (CD-R) is also marketed. [0003] On the other hand, an optical disc called a digital versatile disc / digital video disc (DVD) has also been developed as an optical disc suitable for multimedia applications. This DVD is recommended for a wider range of applications, such as video data, audio data or computer data. A DVD disc having the same size as a CD disc (12 cm in diameter) has a significantly increased recording capacity. [00...

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
IPC IPC(8): G11B19/12
CPCG11B19/12G11B19/06G11B19/127G11B2220/2537
Inventor 熊谷英治长嶋健二塚田太司
Owner SONY CORP