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

Disc devices

An optical disc device, optical disc technology, applied to optical recording heads, recording of information on magnetic discs, recording/reproducing by optical methods, etc., can solve problems such as rotational speed drop

Inactive Publication Date: 2003-09-03
TEAC CORP
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the rotational drive of the spindle motor is temporarily stopped in order to perform the seek operation, the rotational speed of the disc will gradually decrease due to the rotational load.

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
  • Disc devices
  • Disc devices
  • Disc devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0039] At figure 2 In , a block diagram showing the configuration of the optical disc device according to this embodiment is shown. An optical disk 10 such as a CD-ROM, CD-R / RW, DVD-ROM, DVD-R / RW, etc. is rotationally driven by a spindle motor 11 .

[0040] The optical pickup (PU) 12 is arranged to face the optical disc 10 and includes a laser diode (LD) for irradiating laser light on the surface of the optical disc 10 . The laser diode is driven by a laser diode drive circuit (LDD) 32, and is irradiated with laser light at a reproducing power when reproducing data, and is irradiated with laser light at a recording power (recording power>reproducing power) when recording. In addition, the optical head 12 has an optical sensor that converts laser light reflected from the optical disc 10 into an electrical signal, and outputs the reproduced signal to the servo detection unit 14...

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 patent relates to an optical disk drive which can increase a reproduction rate while reduces the current consumption. When the operation is resumed from the standby state, the seek operation of an optical pickup 12 made in the manner of immediately stopping the operation of a spindle motor 11 by a controller 30 is not practiced, but the rotational driving of the optical disk 10 by the spindle motor 11 is allowed for only a specified time in the operational time allowed from a host device, and after that, the operation of the spindle motor 11 is stopped and the seek operation of the optical pickup 12 is performed. The speed of revolution of the optical disk 10 is rapidly accelerated up to the objective speed by delaying the seek operation for the specified time. When the speed of revolution of the optical disk 10 reaches the objective speed, the optical disk 10 stopps the delay of the seek operation, and when the read command is issued, shifts to the seek operation of the optical pickup 12.

Description

technical field [0001] The present invention relates to an optical disc device, and particularly relates to reduction of power consumption accompanying the drive of the optical disc and the drive of the optical pick-up. Background technique [0002] In the existing portable CD drive or DVD drive, etc., in order to reduce the current consumption during operation, a motor (spindle motor) that rotates and drives the optical disc and a motor that moves the optical head along the radial direction of the optical disc to search ( Optical head drive motor) is not driven at the same time control technology. [0003] For example, Japanese Patent Application Laid-Open No. 2000-251272 discloses a technique for limiting the operation of a spindle motor that rotates an optical disc by operating a current control device when moving an optical pickup using a seek control device. [0004] Since the spindle motor consumes a large amount of current, as mentioned above, during the search opera...

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): G11B19/00G11B7/00G11B7/085G11B7/12G11B15/467G11B19/28G11B21/08
CPCG11B7/08505G11B19/28G11B19/2054G11B19/20
Inventor 田中正
Owner TEAC CORP