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| Number | Title | Issue Date |
| 7460455 | Method for determining relationship between difference of object lens location and driving control effort in optical storage device and apparatus thereof A method used in an optical storage device having a pickup head. The pickup head includes an object lens, a first and a second light source. The object lens focuses the laser light generated by the first or the second light source onto a first or a second focal poin... | 12/02/2008 |
| 7397735 | Optical disk device capable of preventing collision between disk and objective lens, and control method thereof The magnitude (Ga) of an impact applied to a lens holder is constantly monitored based on an output of an impact sensor. When it is determined that Ga exceeds Gth, focus servo is released, and the lens holder is provided with a force to make it move away from a disk... | 07/08/2008 |
| 7366963 | Data recording/reproduction device, data recording/reproduction method, and digital camera The present invention is directed to a data recording method of notifying degree of deterioration of recording medium thus to perform stable recording operation. Even in the case where uncorrectable address read error does not exist, deterioration information is dis... | 04/29/2008 |
| 7362665 | Seek method of optical disks and optical storage device An optical disk includes a first area, a second area having time information undistinguishable from time information of the first area and a third area having unique time information. The third area is divided into a plurality of sub-areas. Peculiar zone numbers are... | 04/22/2008 |
| 7359293 | Optical pickup device An optical pickup device is applied to DVD recorders and includes a beam expander unit. A drive coil wound around a lens holder within the beam expander unit, is located in a magnetic field formed by a magnet. When an electric current is passed through the drive coi... | 04/15/2008 |
| 7358776 | Signal detection circuit and signal detection method It is intended to provide a signal detection circuit and a signal detection method capable of preventing influences of variations in transistor characteristics, occurrence of yield degradations of the signal detection circuit and capable of detecting differential in... | 04/15/2008 |
| 7355944 | Authenticatable media and method of authenticating One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second opt... | 04/08/2008 |
| 7345966 | Method and apparatus for achieving a short seek with a stepping motor A method for controlling a stepping motor in an optical storage system and for achieving a short seek with the stepping motor is disclosed. The optical storage system comprises a pick-up head and object lens, wherein the object lens is movably installed on the pick-... | 03/18/2008 |
| 7345961 | Information medium apparatus and information medium starting method An information medium apparatus for performing at least one of a recording operation and a reproduction operation for the information medium, includes: a determination section for determining whether or not a cartridge for accommodating the information medium has be... | 03/18/2008 |
| 7336590 | Dielectric reproducing apparatus, dielectric recording apparatus, and dielectric recording/reproducing apparatus A dielectric reproducing apparatus is provided with: a probe for applying an electric field to a dielectric material of a dielectric recording medium; a return electrode for returning the electric field applied from the probe; an inductor placed between the probe an... | 02/26/2008 |
| 7315493 | Apparatus and method for calibrating a laser imagible apparatus A laser imagible apparatus includes a lens, a media tray, and an adjustment mechanism. The adjustment mechanism is configured to determine a voice coil gain for substantially all locations on a media. ... | 01/01/2008 |
| RE39953 | Recording apparatus and method, and reproducing apparatus and method A reproducing apparatus for reading, or a recording apparatus for writing, data from or to a disc having pre-formed thereon a pair of concentrical or spiral tracks adjacent to each other and to which a common address is given, is adapted to control the time at which... | 12/25/2007 |
| 7301720 | Method of determining and applying adaptive track zero position and disc drive using the same A method of determining, and an apparatus to determine, a track zero position of a disc in a disc drive, the method including seeking, sequentially, in units of predetermined numbers of tracks, outwardly from a designed track zero position to a predetermined critica... | 11/27/2007 |
| 7282884 | Procedure for driving a moveable part of an item of furniture A method of driving a moveable part and, in particular, a drawer by a drive unit and, in particular, an electric drive unit. At least over a partial length of track (S2), forming part of the total track traversed by the moveable part, the force exerted on... | 10/16/2007 |
| 7219359 | Actuator used with an optical pickup An actuator for an optical pickup having a base on which a holder is fixed, a bobbin, a support member, and a magnetic circuit. Pluralities of installation holes are formed in the bobbin such that a plurality of objective lenses to record and/or reproduce optical di... | 05/15/2007 |
| 7180842 | Optical disc cutting apparatus and method for manufacturing optical disc An optical disc cutting apparatus capable of suppressing an unnecessary deflection component and unnecessary light intensity variation component and manufacturing a optical disc suitable for a high definition, high precision and high density optical disc. The optica... | 02/20/2007 |
| 7174558 | Memory device A memory device for recording, playback, and erasure of data through the application of an optical head along a memory medium includes a head carriage and a carriage lock. The head carriage moves the optical head along the surface of the memory medium, and the carri... | 02/06/2007 |
| 7161882 | Method and arrangement for regulating the light power of a scanning beam in an apparatus for reading from or for writing to optical recording media In order to compensate for so-called clipping effects, it is proposed, in an apparatus for reading from and/or writing to an optical recording medium in which the light power of a laser diode (1) is to be set to a plurality of light power levels,to perform a ... | 01/09/2007 |
| 7139228 | Device and method for recording data to optical disk using recording pulse with corrected edge position The present invention provides a device and method for an optical disc such as a DVD which can keep proper edge position of a recording pulse to record data of high quality without depending on a fluctuation in a supply voltage and a fluctuation in a temperature. Th... | 11/21/2006 |
| 7123561 | Device that records on an optical disc and method thereof A device that records information on an optical disc and a method for recording the information on the optical disc, so as to maintain a constant recording quality when the information is recorded on the optical disc using a constant number of the rotations to contr... | 10/17/2006 |
| 7088665 | Optical disc recorder with recording modality switching for high quality recording An error detector circuit compares a value corresponding to a laser power supplied from a monitor diode of an optical pickup with a value representative of a target laser power, and outputs an error from the target value to a change-over switch. The change-over swit... | 08/08/2006 |
| 7072261 | Driving method A method for driving a movable component of a hardware device includes the steps of: (1) driving the movable component to move the driving distance by the former force to determine a base time; (2) setting a reference time, wherein the reference time is smaller than... | 07/04/2006 |
| 7065023 | Light spot advancing direction judging device and method, optical head device control device and method, and optical disk recording/reproducing device A device and a method for judging the radial moving direction of light spots formed on the signal recording surface of an optical disc having grooves of two types, which are different from each other in terms of depth and which are arranged along a recording track t... | 06/20/2006 |
| 7065024 | Disk drive unit There are provided: an optical pickup feed mechanism (12) that detects a disk signal; a disk loading mechanism (11) that feeds a disk D by means of a loading roller (11b) that is driven by a loading motor (11a); a mechanism ... | 06/20/2006 |
| 7061194 | Method and apparatus for controlling constant linear velocity of spindle motor using mirror signal A method and an apparatus for precisely controlling the rotation speed of a spindle motor in an optical system according to a given condition are provided. The method involves counting in response to a clock signal widths of first and second logic states of an input... | 06/13/2006 |
| 6940799 | Method for generating a signal for detecting the direction of movement of a laser spot, and apparatus therefor A method and apparatus for detecting the direction of movement of a laser spot in an optical disc recording/reproducing apparatus having a photodetector divided into two or more sections, each of which is a light receiving device, aligned in a radial direction that ... | 09/06/2005 |
| 6912183 | High-speed optical read/write pick-up mechanisms and associated methods High-speed pick-up mechanisms operable for reading data from and/or writing data to an optical storage medium are disclosed. These mechanisms comprise a pivotable structure, a reflective element, a light source, a light receiving device, and an actuation device. The... | 06/28/2005 |
| 6870800 | Method of searching for a boundary position between a recorded region and an unrecorded region of a recording disc, and information recording apparatus A boundary position search method and an information recording apparatus are provided for rapidly transferring a recording/reproducing head to a boundary position between a recorded region and an unrecorded region of a recording disc when new information data is rec... | 03/22/2005 |
| 6868050 | Calibration method for writing to optical media The present invention provides a method and system for calibration of writing to an optical medium. The method includes: sampling marks in a calibration area of the optical medium; and converting the sampled marks into a digital format utilizing an ADC, the ADC also... | 03/15/2005 |
| 6826138 | Method for aligning actuator assembly to a base in a miniature optical disk drive Disclosed is a method for aligning a rotating device such as an actuator assembly to a base of, for example, a disk drive. The device is rotatably mounted to the base about the pivot pin. The method may involve adjusting the angular position of the pivot pin relativ... | 11/30/2004 |
| 6813228 | Tracking and focus servo system with direction sensor A direction sensor in a tracking and focus servo system of an optical disk drive is presented. The direction sensor calculates a direction sum signal and a tracking error signal from side elements of detectors in an optical pick-up unit of the optical disk drive. A ... | 11/02/2004 |
| 6714499 | Flying optical recording/playback head and method for controlling the flying height A flying optical recording/playback head for near-field optical recording/playback, which is capable of keeping the flying height of an optical lens to be constant and obtaining a stable playback signal, is provided. In the flying optical recording/playback head, a ... | 03/30/2004 |
| 6678231 | Disc reading control apparatus, method thereof and computer program product for controlling disc reading A disc reading control apparatus 10 comprises operation information inputting unit 12 for inputting information concerning a data getting operation A and a searching operation B in a data reading operation with respect to a disc recording medium; operatio... | 01/13/2004 |
| 6549504 | Dual optical pickup head for accessing both DVD and CD disc A dual optical pick-up head for accessing CD, CD-R and DVD discs is provided. The provided dual optical pick-up head uses an objective lens and a laser source for DVD discs, and uses another objective lens and another laser source for CD and CD-R discs. S... | 04/15/2003 |
| 6449222 | Servo control apparatus and method utilizing a light spot shifted beyond a signal change area of an information record medium A servo control apparatus for carrying out a servo control when information is reproduced from an information record medium having an embossed area where information cannot be recorded, such as DVD-RW, is provided. The servo control apparatus detects a po... | 09/10/2002 |
| 6418093 | Information recording medium which indicates information according to the wobbling of a track and information recording and reproducing apparatus An exposure system and method for an original disk for an information recording medium. A rotating device is provided for driving an original disk and an optical head irradiates a beam for exposure on the original disk. A scanner performs exposure to ligh... | 07/09/2002 |
| 6414926 | Optical disc drive An optical disc drive which can at least read out data from an optical disc is disclosed. The optical disc drive comprises a rotational drive mechanism for rotating the loaded optical disc at a predetermined rotation speed which is one of multiple rotatio... | 07/02/2002 |
| 6345025 | Apparatus for recording and/or reproducing information and/or from optical information record disk An apparatus for recording and/or reproducing information on and/or from a magneto-optical disk including an optical head for projecting a laser beam onto a magneto-optical disk and receiving the laser beam reflected by the disk, an up-down block arranged... | 02/05/2002 |
| 6320833 | Recording apparatus and method, and reproducing apparatus and method A reproducing apparatus for reading, or a recording apparatus for writing, data from or to a disc having pre-formed thereon a pair of concentrical or spiral tracks adjacent to each other and to which a common address is given, is adapted to control the ti... | 11/20/2001 |
| 6293135 | Method of calibrating a system for detecting contact of a glide head with a recording media surface A method and apparatus for calibrating a glide head and detector system performs a pre-screening to ensure the quality of the glide head and the piezoelectric sensor in the detection system. The glide head and the piezoelectric sensor detect a signal when... | 09/25/2001 |
