Did You Know...
...that the Slinky toy was the result of a failed attempt by engineer Richard James to produce an antivibration device for ship instruments? His goal was to develop a spring that would instantaneously counterbalance the wave motion that rocks a ship at sea. Instead, he developed the Slinky.
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| Number | Title | Issue Date |
| 8004940 | Optical disk device and rotation control method An optical disk device of the present invention includes a spindle motor, an optical pick-up, and a rotation control portion. The spindle motor is a rotational drive portion that rotates an optical disk, on an information recording surface of which a plurality of ad... | 08/23/2011 |
| 7599264 | Optical drive spin rate control A method and system for controlling the spin rate of an optical device. A device driver provides notification that media has been inserted into the optical device. A control service determines the format of information on the media. The spin rate of the optical devi... | 10/06/2009 |
| 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 |
| 7359298 | Optical pickup device for writing information to an optical disk The present invention relates, in general, to an optical pickup and apparatus for recording and reproducing information on and from an optical recording medium, such as a compact disk or a digital versatile disk and, more particularly, to an optical pickup device, w... | 04/15/2008 |
| 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 |
| 7184379 | Optical disk recording/reproducing method and apparatus in which recording properties of the disk are detected when recording speed is changed An operation for recording a recording signal onto a disk (1) is interrupted, when an amount of signal data stored in a buffer RAM (11) for temporarily storing the recording signal is less than an interruption setting value during performing of the rec... | 02/27/2007 |
| 7177263 | Recording medium and apparatus and method for manufacturing the same A recording medium comprises pairs of groove tracks and land tracks provided side by side while being bent periodically, a plurality of land prepits previously formed on the land tracks and carrying information about the groove tracks, and a recording layer formed o... | 02/13/2007 |
| 7151727 | Disc-shaped recording medium, disc-state recording medium cutting apparatus, and disc drive apparatus There is provided an optical disc having preformed thereon a spiral wobbled track as a grove and/or land along with data is to be recorded. The track is wobbled for a series of predetermined signal units each composed of an FSK information bit part based on a wavefo... | 12/19/2006 |
| 7136243 | Method and apparatus for correcting for systematic errors in timing pattern generation Improvements in placement of timing patterns in self-servowriting include correcting for systematic errors due to geometric effects. A correction is made for varying systematic errors, such as when the recording head has spatially separate read and write elements. F... | 11/14/2006 |
| 7133331 | Recording medium having a substrate containing microscopic pattern of parallel groove and land sections and recording/reproducing equipment therefor An information recording medium 1 at least comprises a substrate 13 having a microscopic pattern 20, which is constituted by a shape of continuous substance of approximately parallel grooves formed with a groove section G and a land section L al... | 11/07/2006 |
| 7120103 | Information storage apparatus An information storage apparatus records, reproduces and/or erases information with respect to a recording medium. The apparatus includes a servo error generation detector for detecting a generation of a servo error based on at least one of servo signals including a... | 10/10/2006 |
| 7113360 | Manufacture of concentric patterns from spiral source The manufacture of magnetic disks for disk drives requires formation or servo tracks in a concentric pattern on the disk. Certain types of beam apparatuses for forming feature patterns on a disk shaped substrate, such as might be used in hard disk manufacture, howev... | 09/26/2006 |
| 7113475 | Optical information storage medium and recording/reproducing method for the optical information storage medium An optical information storage medium includes information on recording layers having the same reproduction channel characteristics or different reproduction channel characteristics. Nominal recording speed information is recorded in a read-only zone, and maximum an... | 09/26/2006 |
| 7106671 | Recording medium, recording apparatus, and reading apparatus In a recording material, physical characteristic information of the recording medium, and more specifically, material information representing the material of the disc, is recorded. Accordingly, a recording apparatus and a reading apparatus easily and accurately det... | 09/12/2006 |
| 7106667 | Data recording device capable of restarting after an interruption When data recording is interrupted, a location at which data have been last recorded is accurately detected and a seamless restart of the recording is achieved even if reproducing errors occur due to scratches or the like on an optical disk. A pattern data that indi... | 09/12/2006 |
| 7088650 | Methods and apparatus for optical disc data acquisition using physical synchronization markers Methods and apparatus for using physical synchronization markers during optical disc data acquisition are provided. In accordance with this invention, physical synchronization markers on optical discs and/or disc covers can be used to determine absolute and/or relat... | 08/08/2006 |
| 7079459 | System and method for performing a spin motor startup operation A system and method for controlling operation of a motor system that addresses the design challenges for the small form factor optical disk system. The present invention includes starting the operation of a motor including windings and a rotor; placing the motor in ... | 07/18/2006 |
| 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 |
| 7016278 | Apparatus and method for controlling recording speed of optical disc recording system A method of controlling a recording speed of an optical disc recording system includes detecting error information with respect to a level of a servo control signal of the optical disc recording system, and adjusting the recording speed of the optical disc recording... | 03/21/2006 |
| 6961293 | Method and related device for achieving stable writing state of compact disk drive by adjusting writing clock A method and related circuit for synchronizing a writing clock with a wobble clock of a compact disk (CD) drive. The CD drive is capable of rotating a CD that has a data track for recording data and a wobble track. The CD drive is capable of generating the wobble cl... | 11/01/2005 |
| 6952388 | Optical record carrier containing special codes The invention relates to a record carrier of a disc-like optically inscribable type, having a preformed track in which an auxiliarily signal comprising a sequence of codes is recorded by means of a preformed track modulation. The codes comprise a sequence of address... | 10/04/2005 |
| 6906988 | 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... | 06/14/2005 |
| 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 |
| 6894961 | Recordable optical disk and optical disk recording device utilizing pre-recorded recording speed information Information indicative of disk-applicable recording speeds is incorporated in lead-out start time information within ATIP information that is recorded in pre-grooves located in a lead-in area of an optical disk. Once the optical disk is inserted in an optical disk r... | 05/17/2005 |
| 6829204 | Method of controlling a rotational rate of an optical disc and optical disc recording device using the same An optical disc recording device controls a rotational rate of an optical disc and an optical disc recording device recording using a constant angular velocity method, thereby efficiently using the performance of the optical disc. A CPU reads management information ... | 12/07/2004 |
| 6757230 | Information recording medium, information reproduction apparatus, and information recording apparatus An information recording medium of this invention has a spiral track. The spiral track has one or more header fields per round of the spiral track, and a data field located between neighboring header fields. The data field has a variable length corresponding to an i... | 06/29/2004 |
| 6754152 | Recording medium, information recording and reproducing method, and recording and reproducing apparatus Conventionally, as in the case of switching between a DVD-R and a DVD-RAM, when the method of record mark arrangement in a track is changed, the physical format of the disk is also changed. This makes it difficult to ensure compatibility between pieces of data recor... | 06/22/2004 |
| 6751174 | Disc reproducing system A disc playback system according to this invention, as shown in FIG. 1, comprises a pickup 1 for reading information from an information disc 2 on which data are recorded at a constant linear velocity, a disc motor 16 for rotating the informatio... | 06/15/2004 |
| 6538967 | Method and apparatus for controlling a reproduction speed of an optical disk This invention provides method and apparatus for controlling a reproduction speed of an optical disk, which detects the condition of an optical disk and changes the reproduction speed automatically to a pre-determined speed corresponding to the detected d... | 03/25/2003 |
| 6496458 | Synchronized disk recording device having speed variation with recording condition When a recording condition judgement section (28) determines a recording condition of the recording of data onto a disk, and the recording is discontinued in response to the decision, a recording speed setting section (29) switches a recording speed to a ... | 12/17/2002 |
| 6473377 | OPTICAL DISC RECORD CARRIER WITH WOBBLED GROOVES THAT PERMIT RECORDING ON THE GROOVES AND LANDS, APPARATUS FOR MANUFACTURING SUCH A RECORD CARRIER, AND RECORDING AND/OR REPRODUCING APPARATUS FOR SUCH A RECORD CARRIER An optical disc record carrier having at least one wobbled groove that permits information recording on both groove and land tracks is provided. Each groove has a sync wobbling modulated with a continuous signal and an address wobbling. The address wobbli... | 10/29/2002 |
| 6400658 | DVD-RAM disk reproduction apparatus for reducing errors during detection of identification data A DVD-RAM disk reproduction apparatus for reducing an error during detection of ID data, which includes a first operational amplifier for obtaining a sum signal resulting from the addition of four picked-up signals picked up by divided-by-four photodiodes... | 06/04/2002 |
| 6351442 | Recording medium, recording apparatus and reproduction apparatus with reproduction path flag information The recording medium of this invention is recorded with a plurality of digital data and a plurality of reproduction path information defining a reproduction order of the plurality of digital data, wherein the plurality of reproduction path information inc... | 02/26/2002 |
| 6226242 | Disk recording of playback device and method of controlling pickup of the device A disk recording or playback device comprises a pickup movable along the rear surface of a disk, a motor for moving the pickup, arithmetic means for calculating the position of the pickup on the disk, and timer means for measuring the time taken for the m... | 05/01/2001 |
| 5953297 | Disk-shaped recording medium and disk recording or reproducing device A disk-shaped recording medium has a groove only one of whose side-walls wobbles or deviates in radial directions of the disk in order to prerecord first address information. In addition, the disk medium has block areas in the groove and in the land where... | 09/14/1999 |
| 5784346 | Optical disk reproducing device provided with improved spindle motor control An optical disk reproducing device has a spindle servo control in which when a focusing error or a tracking error occurs, the spindle control voltage immediately before the error occurred is detected and stored in a memory. During the spindle servo is bei... | 07/21/1998 |
| 5774428 | Method and apparatus for magneto-optical recording or reproducing using modulated magnetic field First, a recording magnetic field is generated by a magnetic head using a coil drive current a1, and a first data signal is recorded on a groove of a recording layer of a magneto-optical disk. Thereafter, similarly, a second data signal is reco... | 06/30/1998 |
| 5726958 | Spindle motor gain control method for CD-ROM drives and apparatus therefor A method for controlling the gain of a spindle motor in a CD-ROM drive, includes the steps of: calculating a first number of tracks on a disc from a starting point of a program region to a reproduction position of data to be reproduced according to inform... | 03/10/1998 |
| 5715157 | Apparatus for braking a spindle motor in a disc playback system A disc playback system monitors coded information in the tracks of discs being played back in order to determine the radial position of the information pickup apparatus. Responsive to a disc stop command, the radial position is utilized to determine the a... | 02/03/1998 |
| 5539716 | Optical recording disc with compressed audio PCM data interleaved with video data Compressed audio signal data on a CD-ROM disc at a data transfer rate higher than the standard rate. Information indicating the increased data transfer rate is recorded on the disc, and the compressed audio signal data as recorded are interleaved on the d... | 07/23/1996 |
