Information recording apparatus

• US 6,529,466 B2
• Filed: 12/18/2001
• Issued: 03/04/2003
• Est. Priority Date: 12/26/1996
• Status: Expired due to Term

• Current Assignee: Hitachi Consumer Electronics Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Hitachi Maxell Limited (Hitachi, Ltd.)
• Inventors: Saga, Hideki, Sukeda, Hirofumi, Yorozu, Takehiko
• Primary Examiner(s): EDUN, MUHAMMAD N
• Application Number:
  US10/020,211
• Publication Number:
  US 20020041553A1
• Time in Patent Office: 441 Days
• Field of Search: 369/47.1, 369/47.49, 369/47.51, 369/53.1, 369/53.26, 369/59.1, 369/59.11, 369/59.12, 369/116, 369/53.27
• US Class Current: 369/116
• CPC Class Codes: G11B 11/1053 to compensate for the magnetic domain drift or time shift
• CPC Class Codes: G11B 11/10595 Control of operating function
• CPC Class Codes: G11B 7/0045 Recording G11B7/006, G11B7/0065 take precedence
• CPC Class Codes: G11B 7/00454 involving phase-change effects
• CPC Class Codes: G11B 7/00456 Recording strategies, e.g. pulse sequences G11B7/0062 takes precedence
• CPC Class Codes: G11B 7/00557 involving phase-change media
• CPC Class Codes: G11B 7/006 Overwriting G11B7/0065 takes precedence
• CPC Class Codes: G11B 7/126 Circuits, methods or arrangements for laser control or stabilisation

Abstract

An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium includes a total energy irradiating amount discriminating unit for discriminating a total energy irradiating amount of each mark and each space when data is recorded, and a recording energy irradiating unit for switching between at least two levels of the total energy irradiating amount during a mark non-forming period, in accordance with results discriminated by the total energy irradiating amount discriminating unit. The at least two levels may be at least two mutually different levels.

Claims

1. An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, the information recording apparatus comprising:

total energy irradiating amount discriminating means for discriminating a total energy irradiating amount of each mark when data is recorded; and

recording energy irradiating means for switching between at least two levels of the total energy irradiating amount during a mark non-forming period, in accordance with results discriminated by the total energy irradiating amount discriminating means.

2. An information recording apparatus according to claim 1, wherein the at least two levels are at least two mutually different levels.

3. An information recording apparatus for recording data by applying energy to a recording medium to form thereon local physical changes of the medium, the information recording apparatus comprising:

total energy irradiating amount discriminating means for discriminating a total energy irradiating amount of each space when data is recorded; and

recording energy irradiating means for switching between at least two levels of the total energy irradiating amount during a mark non-forming period, in accordance with results discriminated by the total energy irradiating amount discriminating means.

4. An information recording apparatus according to claim 3, wherein the at least two levels are at least two mutually different levels.