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8111598 |
Optical disk apparatus and emission control method
An optical disk apparatus according to the present invention includes a spindle motor that rotates an optical disk on whose information recording surface a plurality of addresses is recorded, an...
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8098556 |
Optical disc device
An object of this invention is to measure the tilt quantity of, and perform a tilt control on, an optical disc accurately without depending on the rotation control method. An optical disc drive...
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8022646 |
Method and apparatus for spindle motor control
Information indicative of the placement of spindle motor components may be obtained and used to provide a correction to one or more BEMF-derived attributes used to control the spindle speed. In...
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7990821 |
Optical disk playback device
An optical disk playback device includes a control means (an LSI 5 for system control) for performing a track search according to contents information, comparing a current track start point...
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7924667 |
Recording and/or reproducing apparatus, medium, and method controlling a write speed
A recording and/or reproducing apparatus, medium, and method controlling a write speed of a disk drive. The method may includes measuring a predetermined disk quality evaluating factor affecting a...
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7898914 |
Optical disk recording apparatus and method of forming visible image on optical disk
An optical disk is equipped with a predetermined mark. A frequency generator outputs an FG pulse of frequency corresponding to the rotational speed of a spindle motor used for rotationally driving...
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7894311 |
Focus servo apparatus
A focus servo apparatus for an optical disc apparatus including an objective lens to converge laser beam on an information recording surface of an optical disc, and an actuator to move the...
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7881162 |
Information processing apparatus and reading control method
According to one embodiment, an information processing apparatus, has a reading unit which, if a transfer delay address is found, stores data in the transfer delay address, in a memory, and stores...
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7876669 |
Information recording carrier and method of reproducing the same
An information recording carrier according to one embodiment has minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other and comprises a...
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7813231 |
Optical disc drive apparatus
An optical disc drive apparatus has: a rotation angle counter cleared when the number of pulses in a frequency multiplied FG signal has reached a value corresponding to one rotation of the disc; a...
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7800997 |
Method and apparatus for generating frequency-multiplied frequency generator signal used in optical drive
An optical drive servo control system comprises: an optical pickup, for accessing an optical disc and generating an optical signal; a spindle motor, for rotating the optical disc and outputting a...
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7796496 |
Information recording carrier and method of reproducing the same
Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by frequency shift modulation while...
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7796497 |
Information recording carrier and method of reproducing the same
Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by frequency shift modulation while...
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7796487 |
Optical system for data storage devices
An apparatus includes a moveable arm for positioning an optical transducer adjacent to a storage medium, a light source, and an elliptical or ellipsoid shaped mirror mounted for reflecting light...
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7791992 |
Method for controlling the record speed of a multi-layered optical disc
A method for controlling the recording speed of a multi-layered optical disc divides a multi-layered optical disc into a plurality of zones with each zone having a corresponding recording speed. It...
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7760595 |
Optical disc device
An optical disc device includes: a spindle motor for rotating a disc; a motor driving circuit for applying a voltage to the spindle motor to drive the spindle motor; an optical pickup for...
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7738340 |
Optical disk apparatus with aberration correcting part, and optical disk
An optical system has an objective lens condensing a light beam from the light source on a recording layer selected from the plurality of recording layers of the optical disk, and leading a...
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7701837 |
Information recording carrier
Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by frequency shift modulation while...
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7684296 |
Information recording/reproducing apparatus having control circuit of spindle motor
There is provided an information recording/reproducing apparatus for recording or reproducing an information to or from an information recording medium having a plurality of recording layers...
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7643403 |
Information recording carrier and method of reproducing the same
Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by frequency shift modulation while...
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7619954 |
Method for controlling spindle in optical disc device
A method and apparatus for controlling a maximum rotational speed of a recording medium, are discussed. The method according to an embodiment of the present invention includes determining an...
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7616533 |
Optical disc apparatus and access control method of the same
An optical disc apparatus, as a learning operation before a recording or reproducing operation, rotates an optical disc at a first speed to read PID information, discriminates between lands and...
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7573786 |
Optical disk apparatus and rotation speed control method thereof
An optical disk apparatus is disclosed which can suppress excessive reduction of recording speed on the inner side of a disk and that can assure quick response of accessing operation. When, at the...
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7548492 |
Optical disk recording/reproduction device and search method for information recording area of optical disk in the same
The optical disk recording/reproduction device is provided with an information recording area search means, comprising, a moving means which detects the presence and absence of information and...
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7545713 |
Access method, information recording and reproducing apparatus, and recording medium
An access method for use when switching from recording into an optical disk to reproduction from the optical disk or vice versa is disclosed that comprises a step of calculating a rotating speed n2...
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7505383 |
Optical disc recording apparatus and method of forming an image on an optical disc
In a case where an image of a density that is uniform over a substantially whole area of an optical disc (200) is to be formed, a servo circuit (138) controls the rotation speed of a spindle motor...
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7460442 |
Optical disk apparatus
An optical disk apparatus for controlling two optical pickups in an optimized way in response to operation modes for rotating the optical disk. When receiving a request for seeking one optical...
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7440375 |
Information recording device and method
There is provided an information recording device for recording record information onto an information recording medium having a plurality of recording layers. The information recording device...
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7414643 |
Method for compensating for position error in an optical disc apparatus
A method for compensating for a position error in an optical disc drive (ODD) is provided. The method compensates for a position error generated by a step error associated with a motor which moves...
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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...
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7333413 |
Optical storage device rotation speed control apparatus and method
A method for controlling the rotation speed of an optical storage device. In the first mode, a first signal is produced, and in the second mode, a second signal is produced. In one mode, a first...
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7218585 |
Information medium and information recording/reproduction apparatus
An information medium includes a lead in area and a data area capable of recording an arbitrary information signal. The lead in area has a recordable portion where an information signal can be...
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7206269 |
Optical disk recording/reproducing apparatus with reduced resume time
The present invention shortens a time to be elapsed from a recording interruption to a recording restart, thereby realizing a reliable recording restart. In one embodiment, an optical disk...
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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...
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7171156 |
Method and apparatus for transmitting audio and non-audio information with error correction
A method and an apparatus for providing digital quality transmission of audio and non-audio information using low cost components and arrangement. The present invention provides for the...
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7065018 |
CLV system and method using PSA lookup
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 control system can be operable to read a...
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7012866 |
Rotation control method for CAV system based on sequential or random access request and on zone access based on access request of recording medium
A rotation control method controls rotation of a CAV system recording medium which has a plurality of zones divided in a radial direction thereof. The rotation control method detects a state within...
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7002885 |
Method for determining an optical write power and an optical disc access system using the same
A method for determining an optical write power and an optical disc access system using the same. In addition to a typical Inner Power Calibration Area, the method includes an Outer (second) Power...
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6961860 |
Method and system for optimizing power consumption during data read/write operation in disk-based memory
A method and system for optimizing energy consumption during data read/write operations in a disk-based memory system is provided. The method includes the steps of reading a data clip length, Ls...
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6901040 |
Kp and Ki lookup system and method
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 control system can include a first module for...
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6876609 |
System and method for controlling a spin motor
A system and method for controlling spin speed, which includes a module for receiving an indication to make a velocity change from a first RPM to a second RPM. The difference between the first RPM...
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RE38704 |
Optical disk recording method employing a plurality of recording areas and apparatus therefor
An optical disk apparatus comprising a reproduced signal detector which digitizes a reproduced signal from an optical disk, a broadband synchronizing clock signal generator for generating a...
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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...
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6826136 |
Apparatus and method for controlling reproduction speed of an optical disk
This invention provides method and apparatus for controlling reproduction speed of an optical disk, which detects the magnitude of a disk vibration after initial operation of an optical disk and...
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6762983 |
Optical disc drive and method of controlling rotation number of a spindle motor for rotating an optical disc
An optical disc drive has a spindle motor for rotating an optical disc; an optical pick-up which can move at least in a radial direction of the optical disc; a sensor for detecting the rotation of...
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6751185 |
Optical disc and apparatus for scanning the optical disc
An optical disc is described for recording data, which disc has a recording area subdivided in coaxial annular zones comprising circular or spiral tracks. Each track within one of the zones is...
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6728177 |
Method of recording data on optical disc at high multiple speed and apparatus thereof
An optical disc recording method to record data on a disc using multiple speeds by dividing a disc region into an inner circumference region and an outer circumference region depending on radii of...
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6633524 |
Method for controlling rotation of an optical disk during a zone change in a data read out operation
A method for controlling the number of disk revolutions in a disk drive using a zone CLV control system to reduce or eliminate the possibility of read-out errors when the data read-out position is...
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6515948 |
Data recording and reproducing apparatus
It is intended to prevent occurrence of rotation lock waiting times when a simultaneous recording and reproducing operation is performed on a disc-shaped recording medium according to the ZCLV...
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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...
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