公开(公告)号：AU661115B2

公开(公告)日：1995-07-13

申请号：AU3520193

申请日：1993-03-11

Applicant: SONY CORP

Inventor： WATANABE HIDETOSHI ,  SUZUKI HIROTSUGU ,  YAMAMOTO MASANOBU

IPC: G11B23/00 ,  G11B7/26 ,  G11B23/03

公开(公告)号：AT117454T

公开(公告)日：1995-02-15

申请号：AT89403314

申请日：1989-11-29

Applicant: SONY CORP

Inventor： OGAWA HIROSHI ,  KATSURAMOTO SHINJI ,  YAMAMOTO MASANOBU

IPC: G11B7/0045 ,  G11B7/09 ,  G11B7/125 ,  G11B19/02 ,  G11B7/00

Abstract: The present invention is concerned with control and detection of a laser beam for an optical disc recording/reproducing apparatus in which the intensity of a return laser beam reflected by an optical recording medium of a recording laser beam used for forming pits (P) and recording data on the recording medium during the recording mode is detected and an error signal including focusing and tracking error signals of the recording laser beam is formed on the basis of a detection output of the intensity of the return laser beam within a predetermined time interval ( tau ) before the pit (P) starts to be formed by the recording laser beam on the recording medium to control the recording laser beam, and in which, when recording data on the optical recording medium having sub-data previously recorded thereon as pre-grooves with wobbling, these sub-data are detected on the basis of the detection output of the return laser beam within said predetermined time interval ( tau ) or within a predetermined time interval other than said predetermined time interval ( tau ).

公开(公告)号：AU8023594A

公开(公告)日：1995-02-09

申请号：AU8023594

申请日：1994-12-06

Applicant: SONY CORP

Inventor： WATANABE HIDETOSHI ,  SUZUKI HIROTSUGU ,  YAMAMOTO MASANOBU

IPC: G11B23/00 ,  G11B7/26 ,  G11B23/03

公开(公告)号：DE3889598T2

公开(公告)日：1994-09-01

申请号：DE3889598

申请日：1988-07-28

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  ENDOH SOHMEI

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B7/26 ,  G11B7/08 ,  G11B23/00

Abstract: There are provided an optical disc (1) and an optical recording apparatus to form a tracking groove onto an optically recordable disc. This apparatus comprises a recording beam generator (2) to generate a recording beam such as a laser beam having a predetermined spot size so as to form a pattern of a predetermined width onto the disc; a light deflector (6) arranged on an optical path of the recording beam generator; and a driver (12) for driving the light deflector (6), for reciprocatingly moving the recording beam in a radial direction of the disc (1) at a high frequency, and for multi-exposing the disc (1) by the recording beam due to the movement of the recording beam in the radial direction, thereby a groove having a width wider than the pattern of the predetermined width is formed. With this apparatus, both of the discrete information pattern and a groove are formed by using a single recording beam. Namely, both of the pits and a wide groove can be formed by using a single recording spot.

公开(公告)号：DE3889598D1

公开(公告)日：1994-06-23

申请号：DE3889598

申请日：1988-07-28

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  ENDOH SOHMEI

IPC: G11B7/00 ,  G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B7/26 ,  G11B7/08 ,  G11B23/00

Abstract: There are provided an optical disc (1) and an optical recording apparatus to form a tracking groove onto an optically recordable disc. This apparatus comprises a recording beam generator (2) to generate a recording beam such as a laser beam having a predetermined spot size so as to form a pattern of a predetermined width onto the disc; a light deflector (6) arranged on an optical path of the recording beam generator; and a driver (12) for driving the light deflector (6), for reciprocatingly moving the recording beam in a radial direction of the disc (1) at a high frequency, and for multi-exposing the disc (1) by the recording beam due to the movement of the recording beam in the radial direction, thereby a groove having a width wider than the pattern of the predetermined width is formed. With this apparatus, both of the discrete information pattern and a groove are formed by using a single recording beam. Namely, both of the pits and a wide groove can be formed by using a single recording spot.

公开(公告)号：DE3320548C2

公开(公告)日：1994-03-17

申请号：DE3320548

申请日：1983-06-07

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  OGAWA HIROSHI

IPC: B41M5/26 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0045 ,  G11B7/013 ,  G11B7/30 ,  G11B20/10 ,  G11B20/14

公开(公告)号：CA1325274C

公开(公告)日：1993-12-14

申请号：CA603254

申请日：1989-06-19

Applicant: SONY CORP

Inventor： OGAWA HIROSHI ,  SAKO YOICHIRO ,  YAMAMOTO MASANOBU

IPC: G11B7/00 ,  G11B7/004 ,  G11B7/007 ,  G11B7/013 ,  G11B7/09 ,  G11B7/24 ,  G11B27/30

Abstract: According to this invention, a recording medium has a recording track comprising first portions alternating at regular intervals with second portions, wherein the recording track has substantially constant width along each of the first portions and changing width along each of the second portions. The changing width along each of the second portions determines a set of a predetermined number of control data bits, and each the set of the predetermined number of bits determines address data for a different data block.

公开(公告)号：GB2260844A

公开(公告)日：1993-04-28

申请号：GB9219573

申请日：1992-09-16

Applicant: SONY CORP

Inventor： AKIMOTO OSAMU ,  YAMAMOTO MASANOBU

IPC: G06F3/147

Abstract: The present invention is directed to a book type display apparatus in which two display units are provided as double-spread pages like a book and which includes a random access function and a data acquisition function as an electronic text so that the reader can read this book type display apparatus as a book. Two casings (31), (32) of box type are made foldable at the center and display units such as LCD panels (24L), (24R) are provided on both casings (31)' (32), whereby data or graphic pattern of each page can be simultaneously displayed on the two display units in a double-spread page fashion.

公开(公告)号：CA1183948A

公开(公告)日：1985-03-12

申请号：CA412435

申请日：1982-09-29

Applicant: SONY CORP

Inventor： YAMAMOTO MASANOBU ,  UMEZU NOBUHIKO

IPC: G02F1/11 ,  G02F1/33 ,  G06K15/12 ,  G11B7/00 ,  G11B7/125 ,  G11B7/128 ,  H04N5/76

Abstract: LIGHT MODULATING APPARATUS A light modulating apparatus for use with a recording apparatus for recording an information signal on a recording medium includes a light source and an acousto-optic modulator for modulating light emitted from the light source in response to a first electrical signal and thereby producing a modulated light signal for acting on the recording medium. Additionally, the apparatus includes an information signal source for providing an information signal, a high frequency oscillator for producing a carrier signal, a signal modulator for modulating the carrier signal by the information signal and providing therefrom the first electrical signal, and a photo-detector for detecting the modulated light signal and producing in response thereto a second electrical signal. The apparatus further comprises a peak-holding circuit for holding substantially a peak value of the second electrical signal, a comparator for comparing the peak value of the second electrical system with a reference signal and providing a corresponding error signal, and an amplitude modulator for controlling the amplitude of the carrier signal in accordance with the error signal. . .

公开(公告)号：DE2814723A1

公开(公告)日：1978-10-12

申请号：DE2814723

申请日：1978-04-05

Applicant: SONY CORP

Inventor： YOSHIO AKIRA ,  SHIRAISHI TADAO ,  YAMAMOTO MASANOBU

IPC: G11B7/26 ,  G03C1/825 ,  G11B7/24 ,  G11B7/252 ,  G11B7/254 ,  G03C1/00 ,  H04N5/76