US 7,411,886 B2 · Device and method of recording information on an optical disc

Abstract

A device for recording information on an optical disc so as to improve the recording quality of the information when a recording operation has just started. The recording device includes a luminous element radiating a light for recording information on the optical disc; a radiation intensity controller constantly controlling an intensity of radiation of the light radiated by the luminous element; a constant outputting unit providing a constant energy to the luminous element; a selector selectively selecting one of the outputs of the intensity of radiation controller and the constant outputting unit; wherein, the selector selects the output from the constant outputting unit during a predetermined duration from a starting time of recording the information on the optical disc, and selects the output from the intensity of radiation controller afterward.

Claims8

Dependent claims

A device for recording information on a disc;

comprising:
a luminous element radiating a light for recording the information on the disc;
and
a controller controlling an intensity of radiation of the light based on a constant voltage for a predetermined period of time from a time the recording of the information to the disc starts,
wherein the constant voltage is determined so that the intensity of the radiation of the laser is greater than an intensity of radiation necessary to record the information on the disc.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/283,834Filed 22 Nov 2005 · continuation

Priority

JP 2000/1390915 Nov 2000

Published

US 2006/0077837 A113 Apr 2006

Granted

12 Aug 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

G11B 7/126
Optical beam sources therefor, e.g. laser control circuitry specially adapted for optical storage devices; Modulators, e.g. means for…
G11B 7/0045
Recording, reproducing or erasing methods; Read, write or erase circuits therefor: recording
G11B 7/1263
Circuits, methods or arrangements for laser control or stabilisation: power control during transducing, e.g. by monitoring
G11B
Information storage based on relative movement between record carrier and transducer

Family

Application09/840,152Parent of this division · filed 24 Apr 2001

Application10/876,674Parent of this continuation · filed 28 Jun 2004

US 2006/0077837 A1Pre-grant publication · published 13 Apr 2006

US 6,999,402 B2Parent of this continuation

US 6,791,923 B2Parent of this division

Application10/876,674Parent of this division

US 2001/0043528 A1Published application

US 2004/0246844 A1Published application

US 7,411,886 B2This patent

From the US filing history. Foreign family members aren’t listed.

Device and method of recording information on an optical disc

Life of this patent

Device and method of recording information on an optical disc

Life of this patent

Abstract

Claims8