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8174946 Optical disk apparatus and method of controlling optical disk apparatus  
An optical disk apparatus includes a rotary driving unit rotating an optical disk which is flexible, an optical pickup irradiating light upon a recording surface of the optical disk on which...
8134902 Optical disc drive apparatus and its control method  
An optical disc drive apparatus which is mounted on a mobile apparatus, which at least reads information from a disc surface of an optical disc disposed in a predetermined position by using a...
8081237 Data recording apparatus and method for protecting hard disk drive and computer program  
A data recording apparatus for recording data on a recording medium includes an acceleration detector configured to detect an acceleration which the apparatus is undergoing; a use mode detector...
7952968 Method and apparatus for recording data in an optical disk device  
A method and apparatus for recording data on an optical disk calculates an optical power at a first recording speed, compares the calculated optical power to a predetermined value, and then...
7940607 Optical disk device  
In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical...
7916593 Optical disk device and method of control of an optical disk utilizing retry feature  
An optical disk device capable of increasing access speed and an image pickup device having such an optical disk device. In a region at the inside of an optical disk where the rotational speed of...
7907482 Method and system for correction of errors  
A method and system for removing periodic disturbances pertaining to turntable and spindle motor errors during recording of a blank optical information carrier. The periodic disturbances are...
7869333 Optical disc apparatus and optical disc reproducing method  
The object of this invention is to provide an optical disc apparatus and an optical disc reproducing method that can realize an excellent reproducing operation by suppressing noise in the optical...
7852723 Disk drive system employing effective disk surface stabilization mechanism  
A stabilization part stabilizes surface vibration of a flexible optical disk along a rotation axis direction of the optical disk by means of pressure difference of air flow created according to...
7835242 Optical disk recording and reproducing device  
A system controller of an optical disk recording and reproducing device makes a display portion display a precaution message for recommending a user to back up data recorded on the optical disk...
7817508 Optical disk unit, control method for optical disk unit, and computer readable storage medium  
An optical disk unit, for reading signals stored on an optical disk medium, is provided with an optical pickup 23 selectively irradiating light of one wavelength, from several mutually different...
RE41639 METHOD FOR DETERMINING A WRITING POWER OF AN OPTICAL DISC DRIVE THROUGH A SHIFTABLE POLYNOMIAL FUNCTION CAPABLE OF BEING SHIFTED ACCORDING TO A DIFFERENCE BETWEEN A REAL READ-BACK SIGNAL PARAMETER AND A TARGET READ-BACK SIGNAL PARAMETER  
A method for determining an optimum writing power of a compact disc drive includes representing the relationship between a target read-back signal parameter and writing power as a polynomial...
7787339 Reproducing position control circuit and reproducing system  
A reproducing position control circuit has a reading part for reading data stored in a recording medium, a position information detecting part for detecting the position information of data read by...
7773474 Disc apparatus  
A disc apparatus which enables an optical pickup to move swiftly to a target track is provided. A disc apparatus (1) includes an optical pickup (4) which irradiates an optical disc (2) with a laser...
7760599 Optical disk apparatus and disk rotation speed control method thereof  
In an optical disk apparatus and a disk rotation speed control method thereof, enabling to rotate a disk at high speed, with stability and certainty, irrespective of mass eccentricity thereof,...
7760604 Optical disc device and tracking control method  
This invention provides an optical disc device that can prevent the occurrence of an error in a starting position of a write operation due to off-tracking, and to avoid an unnecessary stop of the...
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...
7746744 Optical recording system and method thereof  
An optical recording system and a control method thereof. The method includes detecting a target signal level. If the change level of the target signal exceeds a tolerant range, it represents that...
7693017 Optical disc device  
In a conventional method for preventing a collision between a lens and an optical disc which uses a control system similar to the servo control of the optical disc, it is feared that, when there is...
7668058 Method and system for evaluating CD player response to vibration during playback of a CD  
A system and methods for evaluating the response of an optical digital disk player to vibration encountered during playback of optical digital disks are provided. The system includes a simulator...
7649818 Optical recording apparatus and method for searching for recording power of the same  
An optical recording apparatus uses a method of searching for a recording power, where the method includes: searching for a first optimum recording power; recording data on an optical disc at the...
7602129 Rotary-motor-loaded device and control characteristic measurement method and program  
A motor drive control unit includes a chip in which everything about a control system is provided and controls a spindle motor which rotates magnetic disks at a constant speed. When a measurement...
7583577 System and method for measuring vibration characteristics of optical disk drive  
A vibration measuring system is used for measuring vibration characteristics of an optical disk drive. The vibration measuring system includes a command setting unit, a command sending unit, and a...
7548502 Power backup method for disk storage device  
HDD boxes 831 to 83n are each incorporated with a secondary battery box 87, a non-isolated DC/DC converter 89, and an HDD 91. Logical circuit boards 851 to 85n are each incorporated with the...
7508614 Data storage drive having movement sensors  
A drive for data storage includes a first component and a second component movable with respect to the first component. The drive also includes a first sensor and a second sensor. The first sensor...
7480219 Method and apparatus for calculating a variation per track of a focus error to control the tilt of a disk  
Disclosed is a tilt controlling method and apparatus in which an FE signal track at a point where an RF signal is the maximum or an RE signal track at a point where a jitter is the minimum is...
7474490 Disk drive with reduced vibration due to rotational acceleration of a spindle motor  
Embodiments in accordance with the present invention provide a disk drive that ensures quieter rotational acceleration of a recording disk. Certain embodiments relate to a hard disk drive that...
7471429 Vibration detection apparatus, hologram apparatus, vibration detection method for the vibration detection apparatus, and recording method for the hologram apparatus  
A hologram apparatus comprises a vibration detection beam generation unit to apply a vibration detection beam, incoherent to the data and reference beams and to detect the presence/absence of...
7428199 Optical disk stabilizing apparatus and method of controlling optical disk stabilizing apparatus  
An optical disk apparatus includes a rotary driving unit rotating an optical disk which is flexible, an optical pickup irradiating light upon a recording surface of the optical disk on which...
7426163 Method and apparatus for preventing malfunction of disc drive  
A method and apparatus for preventing a malfunction of a disc drive due to an operation error of a correction function for a minimum pit length by selectively performing the correction function...
7423942 Optical disc device for recording different types of optical discs and data recording method for optical disc device  
In an optical disc device comprising: a pickup 3 having a laser diode and generating a laser beam for recording onto an optical disc 1; a disc motor 2 that drives the rotation of an optical disc...
7406012 Semiconductor laser driving device, optical head device, optical information processing device, and optical recording medium  
In order to make it possible to reproduce information recorded on an optical recording medium without causing deterioration in the information, a semiconductor laser driving device include a...
7376063 Control circuit of optical storage device and method thereof  
A control circuit of an optical storage device includes a loop phase calculation unit for calculating a closed loop phase of a servo system according to at least one error signal of the servo...
7342853 Optical disc system and method for managing shock during data record/play  
An optical disc system and a method of managing shock while recording or playing data in the optical disc system are provided. The optical disc system includes an optical pick-up unit for applying...
7333411 Optical recording method and optical recording device  
The present invention is directed to an optical disc recording apparatus adapted for recording data onto a recodable/reproducible optical disc, which comprises a system controller (10) for...
7330410 Information recording method and apparatus, information processing apparatus, information recording system and computer-readable storage medium using dummy data  
An information recording method records information in an information recording medium by acquiring driving power supply information related to a driving power supply of an information recording...
7324414 Apparatus and method of optical disk recording while detecting vibration  
According to the present invention, it is intended that the recording can be executed normally even against small vibrations to which a servo error signal detecting circuit cannot respond. A...
7324417 Optical disc recording apparatus  
An optical disc recording apparatus 100 comprises a temperature detecting circuit 141 for detecting a temperature of an optical disc 200 and corrects a laser power for discoloration a discoloration...
7321532 Protection device and method of a read and write medium apparatus  
The present invention provides a protection device and method of a read and write medium apparatus. When the read and write medium apparatus is operating, the protection device detects the external...
7307931 Determining a value of a recording pulse parameter for optical recording  
A method is described for setting an optimum recording power level for recording information on an optical record carrier. First a series of test patterns is written on the record carrier with a...
7304926 Motor control system having output clamp function and method of the same  
A motor control system comprises a motor controller and a clamp apparatus and is used for controlling a motor apparatus. The motor controller is used for generating a motor control output according...
7280452 Optical recording/reproducing apparatus capable of reproducing backup recorded information in case of a power failure and recorded information backup method thereof  
An optical recording/reproducing apparatus capable of backing up recorded information in case of an electrical power failure and a recorded information backup method thereof. Management information...
7280446 Optical disk drive responsive to internal temperature change  
There is provided an optical disk drive capable of appropriately effecting recording and reproducing operations without being affected by offset values and a laser output value, which are set at...
7274640 Apparatus and method for determining disc type  
A disc type determining apparatus in a disc recording and reproducing apparatus in which vibrations generated by rotations of a disc occur in a focus and tracking control actuator includes an error...
7269114 Method and apparatus for controlling recording to optical disc to cope with shock errors  
A method of controlling recording of data with respect to each track of a once-writable optical disc, includes: detecting whether a shock error occurs during recording of track information; if the...
7257053 Optical disc apparatus  
An optical disk apparatus having a high reliability by evading collision between a condensing lens and an optical disk regardless whether the focus control is in the operative state or in the...
7239589 Method and apparatus for destructing an optical disc  
A method and apparatus renders an optical disk unplayable on a customer's optical disc playback machine. A portion of the information bearing surface of the optical disc or the light reflected...
7236437 Shock detector for optical disc recorders and shock-proof recording method using shock signal  
A shock detector for an optical disc recorder and method for controlling the recording using a shock signal. The shock detector includes a first detecting unit for detecting the amplitude of a...
7233554 Disk drive system employing effective disk surface stabilization mechanism  
A stabilization part stabilizes surface vibration of a flexible optical disk along a rotation axis direction of the optical disk by means of pressure difference of air flow created according to...
7224654 Disc drive apparatus  
An optical disc drive apparatus (1) comprises: rotating means (4) for rotating an optical disc (2); a sledge (10) radially displaceable with respect to an apparatus frame (3); a platform (20)...
Matches 1 - 50 out of 156 1 2 3 4 >