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| Number | Title | Issue Date |
| 7940617 | Method for calibrating a spherical aberration compensation level in an optical drive A method for calibrating an SA compensation level of an optical drive is provided. The method includes steps of providing a plurality of SA compensation levels; obtaining a peak-to-peak value of an S curve corresponding to each of the SA compensation levels; selecti... | 05/10/2011 |
| 7706225 | Recording method and apparatus for optical disk drive A recording method for an optical disk drive is implemented as follows. First, at least one of the level of the focusing error signal, the level of the tracking error signal, a wobble synchronization pattern loss, the error rate of demodulating a wobble signal and t... | 04/27/2010 |
| 7672205 | Method for variably controlling data read speed in optical disc drive A method is provided for variably controlling a data read speed in an optical disc drive. The method includes determining whether or not a read command has been issued; if the determining step determines that the read command has been issued, examining additional in... | 03/02/2010 |
| 7663993 | Disk device for recording and reproducing disks with adaptive rotation control A disk device is arranged to select an appropriate rotation control method according to a kind of an optical disk, a recording format or a recording method so that a recording operation for a certain amount of information may be completed as fast as possible, even i... | 02/16/2010 |
| 7646685 | Tracing discrete spiral path relative to optical disc As an optical disc is being rotated within an optical drive, an optical mechanism of the optical drive traces a discrete spiral path relative to the optical disc. As the discrete spiral path is traced by the optical mechanism of the optical drive, the optical mechan... | 01/12/2010 |
| 7433283 | Hybrid switching method of spindle motor of optical disc drive A hybrid switching method of spindle motor of optical disc drive analyze a disc position status for write/read in said optical disc drive, according said optical disc drive speed to detect a switch mode, and determine said optical disc drive of write/read mode to go... | 10/07/2008 |
| 7362671 | Optical disc recording and/or playing apparatus and method A data recording and/or playing method for recording or playing data to or from an optical disc having a first recording area, where a frame sync signal and the data are recorded, and a second recording area, where a predetermined pattern is preformed, and having ad... | 04/22/2008 |
| 7355939 | System and method for switching control modes of spindle motor A system and method of switching the control modes of spindle motor are described. The switch system comprises a first control module, a second control module and a switch controller. The first control module electrically coupled to the spindle motor and the OPU con... | 04/08/2008 |
| 7339863 | Method of recording information on optical disks at a recording density proportional to the actual information volume and disk nominal capacity A method is designed for recording contents information along a track of an optical disk of a writeable type. A volume detection step is carried out for detecting an actual volume of the contents information to be recorded into the optical disk. A capacity detection... | 03/04/2008 |
| 7339862 | Optical disc driving system and method for determining rotation speed of optical disc A novel optical disc driving system and method for determining the rotation speed of an optical disc are provided, which allow to determine the highest rotation speed optimal for reading out audio and video data in the optical disc in accordance with the environment... | 03/04/2008 |
| 7319646 | Focus operation for an optical disk device A disk device in which at the recovery job of a focus pull-in operation, a CPU supplies servo control means with the respective correction values of the rotational speed of an optical disk and the moving speed of a lens which are described in the data table of a RAM... | 01/15/2008 |
| 7317673 | Apparatus and method for setting offset of digital, video disc, and apparatus and method for adjusting offset An apparatus for setting an offset in a DVD player includes: an offset measuring unit which measures one or more offset parameters for initial reproducing operations of the DVD player; and an offset setting unit which, when the offset measuring unit measures the one... | 01/08/2008 |
| 7313078 | Method of and apparatus for recording data on optical recording medium A method of and apparatus for recording data on an optical recording medium form a mark or a space by using a recording waveform having an erase pattern containing a multi-pulse. The method and the apparatus prevent distortion of the mark or the space and improve a ... | 12/25/2007 |
| 7304523 | Clock generating apparatus and method in optical storage system A clock generating apparatus and clock generating method of an optical disc drive for calibrating a clock signal according to an input signal. The clock generating apparatus includes a frequency detector for detecting sampling times in a duration when the clock sign... | 12/04/2007 |
| 7289397 | Method and apparatus for determining position of optical pick-up head A method for determining the position of a pick-up head involves retrieving the respective parameter values relating to the linear velocity and angular velocity of the pick-up head at a certain place on the optical disk, and then calculating the ratio of the paramet... | 10/30/2007 |
| 7289411 | Optical disc apparatus The present invention provides an optical disc apparatus capable of rotating an optical disc with high speed while enabling reduced current consumption. The optical disc apparatus comprises a spindle motor for rotating the optical disc and a thread motor for driving... | 10/30/2007 |
| 7286453 | Rotation control device, method thereof, program thereof, recording medium storing the program, and information processing apparatus A temperature sensor (131) detects a temperature of a spindle motor (121) of a rotary drive unit (120) for rotating a disk-shaped recording medium (1), and a temperature information acquiring unit (134A) acquires the temperatures a... | 10/23/2007 |
| 7266063 | Optical power calibration method according to a data writing location onto an optical storage carrier A method is used for calibrating a writing power of an optical storage carrier player. The player has an access device for writing data onto the optical storage carrier. The carrier includes a center, an inner power calibration area (first calibration area), a data ... | 09/04/2007 |
| 7262929 | Setting the rotation speed of a rotating disk memory The invention relates to a device comprising a disk drive 1 for rotating a disk memory and at least one interface enabling a data flow between a rotating disk memory and at least one other module 10, 12. In order to enable a comfortable use of such a d... | 08/28/2007 |
| 7177252 | Method and apparatus for recording data on an optical disc A data recording device for recording data on an optical disc by irradiating a laser pulse on the optical disc while controlling rotation of the optical disc at a constant angular velocity. The device includes a laser condition varying unit that changes a peak value... | 02/13/2007 |
| 7158328 | Multi-phase acceleration of a data storage disc A disc drive having a multi-phase acceleration procedure is disclosed. The multi-phase acceleration procedure accelerates a data storage disc in the disc drive from an initial rotational velocity to a final rotational velocity. As the disc reaches the final rotation... | 01/02/2007 |
| 7158458 | Method and apparatus for recording/reproducing information with respect to optical recording medium A method and an apparatus are provided, which enable a user's standby time to be shortened or utilized effectively in the course of recording/reproduction of information with respect to an optical disk. Information recorded on a disk is reproduced preferentially, an... | 01/02/2007 |
| 7151731 | Method for controlling rotation speed of an optical storage device A method of rotation speed control for optical storage device is proposed. The method adjusts the rotation speed of an optical storage device to increase access probability and also enhance performance of the optical storage device. The method includes providing wei... | 12/19/2006 |
| 7136344 | Optical head device and optical information recording/reproducing apparatus Light emitted from a semiconductor laser (1) is split by a diffractive optical element (3a) into a main beam and sub-beams. The diffractive optical element (3a) is divided into four regions by a straight line parallel to a tangenti... | 11/14/2006 |
| 7123570 | Recording/reproducing apparatus with optical path correction system A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in a... | 10/17/2006 |
| 7120096 | Disk apparatus In a case of recording data into an optical disk (100), a disk apparatus (10) rotates the optical disk (100) by a ZCLV system, and in a case of reading out the data from the optical disk, the disk apparatus rotates the optical disk by a ZCAV sys... | 10/10/2006 |
| 7099248 | Method of changing a rotating mode between constant angular velocity and constant linear velocity The present invention relates to a method of changing a recording mode from CAV (Constant Angular Velocity) mode to CLV (Constant Linear Velocity) mode in the middle of recording data to a disk recording medium. A method according to the present invention reads ATIP... | 08/29/2006 |
| 7075870 | Recording/reproducing apparatus for optical information recording medium and optical head A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in a... | 07/11/2006 |
| 7046597 | Optical disk apparatus for recording information at a recording density proportional to the actual information volume and disk nominal capacity A method is designed for recording contents information along a track of an optical disk of a writeable type. A volume detection step is carried out for detecting an actual volume of the contents information to be recorded into the optical disk. A capacity detection... | 05/16/2006 |
| 7038404 | Image forming apparatus An image forming apparatus is provided, which is capable of performing phase control of rotation bodies inexpensively and accurately and is capable of reducing time until completion of phase adjustment at the time of a print operation to prevent first print time fro... | 05/02/2006 |
| 7031240 | Disc drive device A disc drive device optimally controls a speed for reading RTR-format data, such as video and audio, recorded on a DVD-format disc, thereby enabling real-time playback without interruption. In the disc drive device, information added to each sector is used for deter... | 04/18/2006 |
| 7027371 | Rewritable optical recording medium, recording method on the same, and optical disc recording/retrieving apparatus In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecorded/erased state and a recorded state, respectively. When the recording layer is exposed to recording light, amorphous ma... | 04/11/2006 |
| 7012863 | Rotation control circuit, semiconductor integrated circuit, optical disk drive and method for controlling the same A rotation control circuit comprising, a pickup controller configured to amplify an error signal detected by a pickup from an optical disk, and to generate both a low-frequency component in the error signal and a pickup control signal so as to control the pickup, a ... | 03/14/2006 |
| 6996041 | Optical recording medium recording longest mark at speed which half of lowest guaranteed speed for the recording medium A recordable optical information recording medium having an address t for each sector, comprises: an area A1 starting from an address t1 to which access is made only when a recording apparatus performs recording operation; an area A2 starting fr... | 02/07/2006 |
| 6977880 | Multi-layered disc and multi-layered disc reproducing apparatus A multi-layered disc (D1, D2, D3) is provided with a plurality of recording layers laminated with each other in a direction of a normal line of the recording layers, in each of which an information data recording area (2, 4) for recording... | 12/20/2005 |
| 6958960 | Information reproducing method and apparatus An information reproducing method includes the steps o of reading information from an information medium that is rotated, and determining a rotation velocity of the information medium on the basis of a data transfer rate based on a specification of a read request. | 10/25/2005 |
| 6917577 | Method for determining position of optic pick-up head and device of the same A method for determining the position of an optic pick-up head and the device of the same are disclosed. The number of frames in certain section of the disk are used to determine the position of the optic pick-up head. The number of frames in inner section of the co... | 07/12/2005 |
| 6914862 | Device and method for calibrating linear velocity and track pitch for optical disc drive A device and method for calibrating linear velocity and track pitch for an optical disc is disclosed. The device comprises a frequency divider, a synchronous bit-clock generator, a counter and a linear velocity and track pitch calculator. The frequency divider recei... | 07/05/2005 |
| 6904008 | Recording apparatus and recording method A method and apparatus for recording data wherein the amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is controlled according to t... | 06/07/2005 |
| 6870802 | Information reproduction apparatus with selective CLV and CAV control An information reproduction apparatus of the present invention comprises a rotating section 2 for rotating an information carrier 1 on which a unit of continuous information capable of being continuously read out is recorded, a CLV control section 9... | 03/22/2005 |
