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| Number | Title | Issue Date |
| 8077576 | Optimum gap determined recording/reproducing apparatus and method A recording/reproducing apparatus is disclosed that includes a spindle motor unit including a spindle on which a flexible recording disk is placed, a stabilizer plate disposed so as to face the recording disk, a torque detection unit configured to detect a drive tor... | 12/13/2011 |
| 7957243 | Magnetic and optical rotating storage systems with audio monitoring An integrated circuit (IC) for controlling a rotating data storage device comprises a drive module that is implemented by the integrated circuit and that at least one of processes data, stores data and controls operation of the rotating storage device. An audio moni... | 06/07/2011 |
| 7394736 | Dynamic speed control method for storage device A method is disclosed for adjusting the rotational speed of a disk drive. According to the method, the proportion of time which the disc drive is reading data from the disc during a unit time T is calculated. Then, the increase of the rotational speed of the motor i... | 07/01/2008 |
| 7349313 | Clamper magnetism test method for a tray-type optical drive A magnetism test method for a tray-type optical drive is disclosed. A preliminary input voltage is provided to a DC motor of the tray-type optical drive for performing a preliminary ejection on a tray and a magnetic clamper of the tray-type optical drive. Then, a te... | 03/25/2008 |
| 7345972 | Rotation control method and storage apparatus A storage apparatus rotates an optical recording medium at two or more kinds of rotational speeds. The rotational speed is decreased when a read or write margin becomes less than or equal to a first predetermined value or, when a frequency of generation of a servo a... | 03/18/2008 |
| 7330326 | Recordable disk rotational speed error correction circuit An error correction circuit for determining an error in rotational speed of a recordable disk of a disk drive includes a sinusoidal error calculation portion adapted to generate a true oscillation error signal, and a summation portion adapted to combine the true osc... | 02/12/2008 |
| 7257072 | Digital audio data reproducing system A digital audio data reproducing system includes a digital audio data reproducing apparatus having a record medium, a detection part for the record medium and a processing unit; an analog record player; and a rotation detecting apparatus for sensing the speed and se... | 08/14/2007 |
| 7200083 | Speed control method for recording data on an optical disk A speed control method used in an optical disk drive for recording data onto an optical disk includes the following steps: detecting an allowable maximum recording speed of the optical disk and an allowable minimum recording speed of the optical disk, calculating a ... | 04/03/2007 |
| 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 |
| 7099251 | Method of controlling laser power and optical disk player A method of controlling a laser power of a zone Constant Linear Velocity (CLV) type optical disk player, in which a linear velocity of writing data is accelerated, by stages, toward an outer edge of an optical disk. The method includes changing a laser power for wri... | 08/29/2006 |
| 7006418 | Optical disk device that monitors chip temperature of a drive and controls its operation based on the chip temperature Monitor circuits monitor junction temperatures of chips of driver ICs which drive a driving part of a recording/reproduction system. Comparison circuits compare the junction temperatures with respective arbitrarily set temperatures to output temperature flags as com... | 02/28/2006 |
| 6526011 | Apparatus and method for controlling velocity of spindle motor in optical disk reproducing system A control apparatus and method for controlling a velocity of a spindle motor included in an optical disk reproducing system to prevent a forward or backward overrun of a spindle motor are disclosed. A widest signal detector of the apparatus detects the wi... | 02/25/2003 |
| 6414927 | Disk loading apparatus A disk loading apparatus is provided which stops disks, even if the disks have different diameters, when disk center holes have been ejected to the substantially same positions out of an apparatus body during the ejection. The disks can be pulled out with... | 07/02/2002 |
| 5790494 | Digital audio recorder and digital audio recording and reproducing system A digital audio recorder and system efficiently increases a sampling frequency and a number of bits of a digital audio recording. The digital audio system has a frequency analyzer receives a first digital waveform data having a sampling frequency fs1 and ... | 08/04/1998 |
| 5617339 | Method and apparatus for detecting degradation in data storage system spindle motor performance A method and apparatus for detecting degradation in data storage system spindle motor performance is disclosed. A duration of time required for the spindle motor to transition between an initial velocity and a test velocity is determined at or near the ti... | 04/01/1997 |
| 5612845 | Method and apparatus for in-situ detection of data storage system spindle motor performance degradation A method and apparatus for detecting degradation in data storage system spindle motor performance is disclosed. A read/write transducer is oriented over a centerline location of a test track on the data storage disk. A data pattern is read from the test t... | 03/18/1997 |
| 5270992 | Apparatus for controlling rotation of disk player An apparatus for controlling rotation of a spindle motor includes a lock detection unit, a memory unit, a comparison unit, and a control unit. When the lock detection unit detects the lock state of the time base servo loop, a voltage corresponding to the ... | 12/14/1993 |
| 4970380 | Method for optical code pattern enhancement and generation A technique for trimming or making a position sensor that includes a movable encoder having a track extending along a dimension of the encoder, the track having an optical property that varies with position. The sensor also includes a light source for dir... | 11/13/1990 |
| 4823203 | Rotation speed detection circuit in a video disc playback device for detecting a state in which the rotation speed is double a normal speed A circuit in a video disc playback device for detecting a state in which a disc motor rotation speed is double a normal rotation speed comprises a counter for counting a signal occurring at a timing intermediate between windows established for a timing at... | 04/18/1989 |
| 4247976 | Method for production of a turntable with stroboscope marks A method for production of a turntable which carries stroboscope marks with a metallic surface on the face side of its rim, the metallic surface relative to its dark colored intermediate spaces being elevated. In the edge vicinity of a disc which is made ... | 02/03/1981 |
| 4200893 | Instruction indicating apparatus for a record and/or playback device Apparatus for displaying the relative locations of particular information recorded on a movable record medium, such as a magnetic tape, the particular information being represented by a predetermined signal. Electronic pulses are generated corresponding t... | 04/29/1980 |
