中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

26 records (took 0.021 seconds)

    7.
    发明专利
    未知

    公开(公告)号：ID26670A

    公开(公告)日：2001-01-25

    申请号：ID20000344

    申请日：1996-01-18

    Applicant: DISCOVISION ASS

    Inventor： CRUPPER RANDOLPH SCOTT ,  DAVIS MARVIN BENJAMIN ,  GETRUER KURT WALTER ,  GRASSENS LEONARDUS J ,  LEWIS DAVID E ,  SCHELL DAVID LEWIS

    IPC: G11B7/0045 ,  G02B7/04 ,  G11B5/55 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B15/467 ,  G11B17/04 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B21/02 ,  G11B21/10 ,  G11B25/04 ,  G11B33/08 ,  H02K41/035 ,  H03B5/08 ,  H03B5/12

    Abstract: The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second, and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetemined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another.The system claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.

    Optical disc system
    8.
    发明专利
    Optical disc system 未知

    公开(公告)号：AU716195B2

    公开(公告)日：2000-02-24

    申请号：AU4205096

    申请日：1996-01-18

    Applicant: DISCOVISION ASS

    Inventor： CRUPPER RANDOLPH SCOTT ,  DAVIS MARVIN BENJAMIN ,  GETREUER KURT WALTER ,  GRASSENS LEONARDUS J ,  LEWIS DAVID E ,  SCHELL DAVID LOUIS

    IPC: G11B7/0045 ,  G02B7/04 ,  G11B5/55 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B15/467 ,  G11B17/04 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B21/02 ,  G11B21/10 ,  G11B25/04 ,  G11B33/08 ,  H02K41/035 ,  H03B5/08 ,  H03B5/12 ,  G11B7/08

    Abstract: The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second, and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetemined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another.The system claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.

    9.
    发明专利
    未知

    公开(公告)号：ID27883A

    公开(公告)日：1997-01-02

    申请号：ID20000345

    申请日：1996-03-29

    Applicant: DISCOVISION ASS

    Inventor： CRUPPER RANDOLPH SCOTT ,  DAVIS MARVIN BENJAMIN ,  GETREUER KURT WALTER ,  GRASSENS LEONARDUS J ,  LEWIS DAVID E ,  SCHELL DAVID LEWIS

    IPC: G11B7/0045 ,  G02B7/04 ,  G11B5/55 ,  G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/005 ,  G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/125 ,  G11B7/135 ,  G11B11/105 ,  G11B15/467 ,  G11B17/04 ,  G11B19/28 ,  G11B20/10 ,  G11B20/12 ,  G11B21/02 ,  G11B21/10 ,  G11B25/04 ,  G11B33/08 ,  H02K41/035 ,  H03B5/08 ,  H03B5/12

    Abstract: The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second, and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetemined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another.The system claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.

    OPTICAL SEEKING METHOD AND APPARATUS WITH TRACK COUNTING USING TRACKING ERROR SIGNAL HAVING CONSTANT AMPLITUDE DURING DATA SEGMENTS
    10.
    发明专利
    OPTICAL SEEKING METHOD AND APPARATUS WITH TRACK COUNTING USING TRACKING ERROR SIGNAL HAVING CONSTANT AMPLITUDE DURING DATA SEGMENTS 未知

    公开(公告)号：MY135235A

    公开(公告)日：2008-03-31

    申请号：MYPI9802768

    申请日：1996-03-18

    Applicant: DISCOVISION ASS

    Inventor： LEWIS DAVID E

    IPC: G11B21/08 ,  G11B7/085 ,  G11B7/09

    Abstract: THERE IS DISCLOSED A METHOD FOR MOVING AN OPTICAL HEAD FROM AN INITIAL TRACK(10) TO A TARGET TRACK(11) ON A STORAGE MEDIUM(1). THE TOTAL NUMBER OF TRACKS(3) TO BE CROSSED IS DETERMINED, AND THE OPTICAL HEAD IS MOVED TOWARD THE TARGET TRACK(11). A REFLECTIVITY LEVEL OF LIGHT FROM THE STORAGE MEDIUM(1) IS MEASURED, AND A TRACKING ERROR SIGNAL IS DERIVED FROM THE REFLECTIVITY LEVEL. THE TRACKING ERROR SIGNAL HAS BOTH TRUE AND FALSE INDICATORS OF TRACK CROSSINGS. A DATA INDICATOR SIGNAL IS DERIVED FROM THE REFLECTIVITY LEVEL, HAVING INDICATOR POINTS CORRESPONDING TO THE FALSE INDICATORS OF TRACK CROSSINGS. A TRACK COUNT NUMBER IS INCREMENTED FOR EACH TRUE INDICATOR OF A TRACK CROSSING, AND THE OPTICAL HEAD IS STOPPED WHEN THE TRACK COUNT NUMBER EQUALS THE TOTAL NUMBER OF TRACKS(3) TO BE CROSSED. ANOTHER METHOD IS DISCLOSED WHEREBY A TRACK COUNT SIGNAL IS GENERATED FROM THE TRACKING ERROR SIGNAL AND THE DATA INDICATOR SIGNAL. THE TRACK COUNT SIGNAL INDICATES TRACK CROSSINGS CORRESPONDING TO THE TRUE TRACK CROSSING INDICATORS IN THE TRACKING ERROR SIGNAL. AN APPARATUS IS DISCLOSED COMPRISING A SENSOR(14) FOR MEASURING THE REFLECTIVITY LEVEL FROM A STORAGE MEDIUM(1), A TRACKING ERROR SIGNAL GENERATOR(17) FOR GENERATING A TRACKING ERROR SIGNAL, A PREAMPLIFIER(15) FOR GENERATING A DATA SIGNAL, A TRACK CROSSING SIGNAL GENERATOR(18) RESPONSIVE TO THE TRACKING ERROR SIGNAL, AND A TRACK/HOLD SELECTOR(16) RESPONSIVE TO THE DATA SIGNAL TO DIRECT THE TRACK CROSSING SIGNAL GENERATOR(18) TO GENERATE A TRACK CROSSING SIGNAL WITHOUT THE FALSE TRACK CROSSING INDICATORS FROM THE TRACKING ERROR SIGNAL. A SECOND APPARATUS IS DISCLOSED COMPRISING A SENSOR(14) FOR MEASURING THE REFLECTIVITY LEVEL FROM A STORAGE MEDIUM(1), A PREAMPLIFIER(15) FOR GENERATING A DATA SIGNAL, A TRACKING ERROR SIGNAL GENERATOR(32) RESPONSIVE TO THE REFLECTIVITY LEVEL FOR DERIVING A TRACKING ERROR SIGNAL, A TRACK/HOLD SELECTOR(31) TO DIRECT THE TRACKING ERROR SIGNAL GENERATOR(32) TO GENERATE A SIGNAL OF CONSTANT AMPLITUDE(43) FOR A PREDETERMINED PERIOD OF TIME BASED ON THE DATA SIGNAL, AND A TRACK CROSSING SIGNAL GENERATOR(33) RESPONSIVE TO THE TRACKING ERROR SIGNAL FOR DERIVING A TRACK CROSSING SIGNAL INDICATING THE CROSSING OF AN INFORMATION TRACK BY THE OPTICAL HEAD. (FIG 7)

Patent Agency Ranking