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Dynamic Information Storage Or Retrieval > With Servo Positioning Of Transducer Assembly Over Track Combined With Information Signal Processing > Optical Servo System Optical Servo SystemOptical Servo System patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.01/03/08 - 20080002534 - Optical disc/disk drive control system The invention provides a tracking servo control system and a tracking control method for detecting a land pre-pit signal. According to the system and the method, a laser beam is moved to a location adjacent to the land-pre-pit and detects the land-pre-pit signal at the location. A tracking servo control ... 12/20/07 - 20070291598 - Servo branch of optical disc drive comprising a switchable diaphragm and a device for beam deflection, and methods for measuring beam lanking and spherical aberration A switchable diaphragm (9) and a device for beam deflection (10) are placed in the servo branch of an optical drive, in a path of light beams of different diffraction orders. This permits redirection of light beam orders towards a detection means (8) on an individual basis and selection of ... 11/15/07 - 20070263494 - Optical disk device There is provided an optical disk device that is capable of obtaining a required optical disk holding force uniformly and sufficiently. When information held and recorded on an optical disk is reproduced, a recording face of the optical disk is loaded on a loading portion of a clamping mechanism, then ... 11/08/07 - 20070258337 - 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 inoperative state, thereby preventing damage to the condensing lens and the optical disk. When the focus control is ... 10/25/07 - 20070247982 - Objective lens holding device and optical pickup apparatus An objective lens holding device includes a first objective lens, a second objective lens, and a lens holder, wherein an axis-to-axis distance between a central axis of the first objective lens and a central axis of the second objective lens is set to a distance, depending on a first length ... 10/25/07 - 20070247981 - Layer jump control device and method of high-speed optical drive A real-time wobble detector and an adaptive layer distance balancing calculator are added in a layer jump control device of a high-speed optical drive to solve failure and instability caused by the wobble effect of the optical drive during layer jump. A layer jump control method of the optical drive ... 09/27/07 - 20070223323 - Optical pickup device An optical pickup device for irradiating a light from a light source onto an optical recording medium through an objective lens moved in a focal direction by an actuator, and for causing a signal detecting unit to receive a return light from the irradiated light, the optical pickup device including ... 08/09/07 - 20070183273 - Optical pickup device and optical disc drive An optical pickup device having an optical module provided with an optical element and bonded and fixed to an optical pickup case, wherein the optical module is fixed to the optical pickup case by a first ultraviolet curing adhesive at at least two positions with an optical axis between the ... 05/31/07 - 20070121433 - Optical information recording and reproducing apparatus Provided is an optical information recording and reproducing apparatus for recording and reproducing information using holography by irradiating a spatial modulator with a light beam from a first laser light source, separately generating information light and reference light sharing an optical axis, and condensing the generated light beam onto the ... 04/26/07 - 20070091738 - Light producing digital audio signal player A digital audio signal player includes a microprocessor, a light producing ring, a digital audio signal processor, a dynamic RAM, and a manually-operated turning plate; the dynamic RAM is used to store music data; the light producing ring can produce light of several different colors, and it is joined to ... 03/29/07 - 20070070836 - Optical disk device A drive stoppage command unit commands a drive unit to stop driving a pickup head, and an objective lens of a pickup head, when it has decided that the power supply voltage of operating power which is being supplied by a first power supply unit to a servo control unit ... 03/29/07 - 20070070835 - Optical disk device A parameter acquisition unit acquires parameters of a write strategy corresponding to the type of an optical disk upon which data is to be recorded, and a recording unit irradiates pulse modulated laser light upon the optical disk based upon the parameters of the write strategy acquired by the parameter ... 03/29/07 - 20070070834 - Signal processing method and signal processing apparatus A signal processing apparatus is provided with a converter for converting at least one analog light detection signal into a digital light detection signal, and a signal generator for generating at least one servo error signal by subjecting the digital light detection signal to a predetermined operation process. The signal ... 01/18/07 - 20070014202 - Actuator calibration using a focus error signal A lens actuator is calibrated by inputting a signal to the actuator to cause the actuator to move a lens from a first location to a second location, sensing a focus error signal generated in response to the movement of the lens, determining a distance moved by the lens in ... 12/14/06 - 20060280055 - Laser power control and device status monitoring for video/graphic applications Signals, such as the +5V signal, the HPD signal, and LOS output from DDC, CEC, or HDMI signals are dynamically monitored, whereby a stand-by mode is entered in the absence of signal activity in any of the above-mentioned dynamically monitored signals. Such a monitoring architecture reduces power dissipation and allows ... 12/14/06 - 20060280054 - Interface device for optical recording and/or reproducing apparatus An interface device for an optical recording and/or reproducing apparatus for recording and playback of an optical disc, wherein the configuration of an interface circuit between a pickup that reads and writes information from/on the optical disc and a radio frequency (RF) integrated circuit (IC) for signal processing is simplified. ... 11/30/06 - 20060268669 - Optical pickup unit and information recording/reproducing apparatus An embodiment of the invention is useful for providing an optical pickup unit, which condenses light with different wavelengths at different positions and focal distances, and exactly detects a focus error signal when receiving the reflected light with different wavelengths from two or more kinds of recording medium, in the ... 11/30/06 - 20060268668 - Tilt controller based on distortion-free control signals and an optical reproducing apparatus thereof A tilt controller controlling a tilt of an actuator of an optical pickup based on distortion-free control signals and an optical reproducing apparatus including the tilt controller. A control signal generator generates firs and second control signals to control the actuator. A reference control signal generator generates a reference control ... 11/23/06 - 20060262678 - Focal control adjusting method and optical disk apparatus A focal control adjusting method according to the present invention comprises a first step for detecting a focal error signal obtained through condensing and irradiating a light beam on a rotating recording medium, and a second step for setting a focal control gain for controlling a positional shift between a ... 11/23/06 - 20060262677 - Optical disc drive with multiple disc capability An optical disc drive includes a housing configured for being installed within or coupled to the computer, either internally or externally. The optical disc drive further includes a plurality of compartments configured for holding a respective plurality of optical discs within the housing. The optical discs may be placed within ... 11/23/06 - 20060262676 - Optical disc apparatus and method of shifting layers in multi-layer optical disc A method of shifting layers in a multi-layer optical disc and an optical disc apparatus are provided. The method comprises applying a certain first drive voltage needed for a first layer shift when moving a focusing point in a multi-layer disc, calculating an upward deviation constant that is the length ... 11/23/06 - 20060262675 - Radial runout detection method and device for an optical disk drive A radial runout detection method and device for an optical disk drive, which sets a reference locus at a location distant from a current beam locus by M, a minimum track number, a maximum track number and a detection time, and executes the following steps in the detection time: increasing ... 11/23/06 - 20060262674 - Focusing servo device, optical disc recording/reproducing device and focus-searching method A focusing servo device, an optical disc recording/reproducing device and a focus-searching method are provided for making a focus of an energy beam emitted by a pick-up unit to fall in an accessible range of a data layer of a disc. The method comprises the following steps: recording the deviation ... 11/23/06 - 20060262673 - Calibration of fine actuator of optical drive A known current is applied to the fine actuator for an optical mechanism of an optical drive. The distance that the optical mechanism radially travels in relation to a data side of an optical disc, in response to the applying of the known current, is determined. The fine actuator is ... 11/23/06 - 20060262672 - Optical disk device and information recording/reproduction method An optical disk apparatus including: a light source; an objective lens for converging light emitted from the light source toward an optical disk; a first photodetection device for detecting reflected light from the optical disk and outputting a first signal; a signal processing section for receiving the first signal and ... 11/02/06 - 20060245317 - Optical head and information recording/reproducing apparatus To provide an optical head unit which is configured to provide a reproduce signal when reproducing information from a recording medium of a corresponding standard by selectively using laser beams with different wavelengths, an optical diffraction element is provided, in which the grooves of a binary diffraction grating mainly for ... 11/02/06 - 20060245316 - Optical head and information recording/reproducing apparatus To provide an optical head unit which is configured to provide a reproducing signal difficult to be influenced by vibrations when reproducing information from a recording medium of a corresponding standard by selectively using laser beams with different wavelengths, the distance between a beam split phase of a beam splitter ... 11/02/06 - 20060245315 - Optical pickup lens and optical pickup apparatus An optical pickup lens focuses laser beams having different wavelengths λ1, λ2 and λ3 on at least three kinds of optical discs. At least one side of the optical pickup lens has a concentric loop zonal structure for compensating wavefront aberration occurring when recording or reproducing an optical disc having ... 11/02/06 - 20060245314 - Recording disc and apparatus and method for reproducing recorded information A recording disc and recorded information reproducing apparatus and method for immediately starting reproduction of information when a push-pull based tracking control is employed to reproduce recorded information from the recording disc. The recording disc comprises an information data area for recording recording marks which carry information data in columns, ... 11/02/06 - 20060245313 - Disc drive and drive control method of disc drive There is provided a disc drive adopting a slot-in loading by which an optical disc (2) is loaded into or ejected out of the device body through a disc slot. The disc drive can have loaded therein a large-diameter optical disc (2A) and small-diameter optical disc (2B), different in outside ... 11/02/06 - 20060245312 - Information recording/reading head, and information recording/reproducing device H=η·P. ... 10/19/06 - 20060233066 - Disk recording apparatus, method, and recording control program An optical disk recording apparatus includes a beam emitting unit operable to emit a first beam for irradiating a track on an optical disk so as to record data and second and third beams for irradiating spaces between the track and tracks on both sides of the track, respectively; a ... 07/27/06 - 20060164935 - Member switching apparatus, lens switching apparatus, laser repair apparatus, and laser inspection apparatus A linear motor table is provided in a lens switching apparatus of a laser repair apparatus. The linear motor table is fixed with respect to a table and a laser oscillator and moves a lens holder in a horizontal direction. Six objective lenses with magnifications different from each other are ... 07/27/06 - 20060164934 - Automatic focus for image sensors The embodiments of the invention relate to automatic focusing methods and apparatus suitable for use in digital imaging devices. The proposed methods and apparatus evaluate the focus condition of the optical system by evaluating the digitized image, without requiring additional hardware besides the digital image-capture signal flow path. A method ... 07/20/06 - 20060158970 - Method for controlling a dynamic system as well as a device suitable for carrying out such a method A system includes two guides that extend parallel to each other and a beam that extends transverse to the guides. The beam is movable over the guides, with a slide being movable over the beam. In controlling the system, a first difference is determined between desired and actual positions of ... 06/22/06 - 20060133227 - Digital disk read/write device A device for reading from and/or writing on a rotating disk including a mobile opto-electromechanical device placed above the disk and connected to a motherboard via a set of electric wires. The opto-electromechanical device includes actuators, a laser diode, photodetectors, and an electronic circuit, each photodetector providing the electronic circuit ... 06/15/06 - 20060126453 - Focus control via ac input signal A method of mapping a surface of a printable medium comprises illuminating the surface with electromagnetic radiation and focusing the electromagnetic radiation with a focusing means. The method also includes modulating the position of the focusing means using an actuator, wherein the actuator has a resonant frequency. An input signal ... 06/08/06 - 20060120226 - Optical pick-up device and optical disk device An optical pick-up device for carrying out at least one of recording and reproduction of information for an optical disk, comprises a laser beam source emitting a laser beam; a laser beam source adjusting member disposed on an opposite side of an emitting portion for emitting the laser beam of ... 06/01/06 - 20060114764 - Birefringent optical component An optical component (600, 181) comprises two adjacent materials (610, 620) with a shaped (e.g. curved) interface between the materials (612, 622). The first of the materials (610) is birefringent. The second material (620) has a refractive index substantially equal to the refractive index of the birefringent material at a ... 05/18/06 - 20060104163 - Optical disk apparatus and method for tracking thereof An optical disk apparatus and method having a pick-up part for emitting a light onto a recording surface of an optical disk and receiving the light reflected from the recording surface of optical disk and a driving part for controlling the pick-up part. The apparatus and method comprise an error ... 05/18/06 - 20060104162 - Method for driving an actuator, actuator drive, and apparatus comprising an actuator An actuator driver circuit comprises a drive signal source (60) and an electrical damping element (100) having a negative resistance connected in series with the drive signal source (60). A controllable switch is provided for selectively switching said electrical damping element (100) into or out of a signal path from ... 05/11/06 - 20060098539 - Track jump method for a recording medium A track jump method for an optical recording/reproducing medium is provided. In the track jump method, once a track jump command is input, a track jump operation is held until a falling edge of a header mask signal is detected. The track jump starts at the falling edge of the ... 04/27/06 - 20060087928 - Mirror element and mirror array Providing a mirror element and a mirror array used for an optical pickup of optical apparatus or optical disc apparatus that obtain a large displacement amount with a low voltage The mirror element includes a board; a film including a first piezoelectric body, and a first electrode and a second ... 04/13/06 - 20060077778 - Consumer electronics with optical communication interface Digital electronic devices for optical communication of digital video and/or audio signals between a digital source device and a digital sink device. A digital source device includes a transition minimized differential signaling (TMDS) transmitter for receiving control and digital video signals from a source controller and for converting the control ... 04/06/06 - 20060072382 - Optical disk device An optical disk device includes: an optical disk drive mechanism disposed in a housing-shape drive case (2), the optical disk drive mechanism including an optical head (7) on which a semiconductor laser (5) is mounted, a rotary driver for driving an optical disk (8), and a transfer mechanism for transferring ... 03/23/06 - 20060062102 - Optical data storage system An optical data storage system includes a light emitting and receiving device (30), a light transmission device (31) having an input port (32) and an output port (33). The input port is disposed adjacent to the light emitting and receiving device. Furthermore, a micro window is provided at the output ... 03/23/06 - 20060062101 - Optical pickup device An optical pickup device comprises a light emitting element which emits laser light, a photodetector which monitors a state of the laser light emitted from the light emitting element and applies feedback to a control of the light emitting element, and a reflect mirror which allows a portion of the ... 03/23/06 - 20060062100 - Image pickup apparatus and electronics apparatus mounting the same There is provided an image pickup apparatus having an image pickup unit having an image pickup element, an optical unit having lenses, a sector drive unit having sectors arranged in a space for arranging the sectors, and supporting members being fixed in the space for arranging the sectors and having ... 03/23/06 - 20060062099 - Data transmission method and system thereof, portable terminal, and data receiver In a data transmission method according to an exemplary embodiment, a data transmitter, which is capable of outputting a dummy light for judging an optical axis and a signal light having a beam spread smaller than that of the dummy light on the same optical axis, outputs the dummy light ... 03/23/06 - 20060062098 - Optical pickup spherical aberration compensating method, optical pickup sherical aberration focus offset compensating method, and optical pickup device An optical pickup (20) projects a read beam onto an optical disc (40) as an optical storage medium which is driven to rotate by a spindle motor (30) and receives its reflection. A laser beam from a laser producing element (21) passes through a liquid crystal panel (25) and guided ... 03/23/06 - 20060062097 - Radial control method for a device for reproducing information of an optical disk, and reproduction device for carrying out said method A phase comparison signal circuit (100) makes it possible to construct a radial error signal (Sr) by measuring the phase shift of the diagonal read signals. The invention applies in particular to phase discs with slightly phase-shifting marks. ... 03/02/06 - 20060044958 - Probe position error detecting method and apparatus in probe-based data storage system A probe position error detecting method and apparatus in a probe-based data storage system are provided. The method includes preparing servo codes, which are Gray codes. The Gray codes have a Hamming distance of 1 and satisfy alternate conditions for Q (a natural number) and Q+1, the conditions being based ... 02/23/06 - 20060039249 - Systems and methods for reading optical-card data Systems and methods are provided for reading data encoded on an optical card as a series of binary pits formed within optical-card tracks separated by an average optical-card track pitch. A translator and a compact-disc laser head are provided. The compact-disc laser head reads data from a compact disc having ... 02/02/06 - 20060023576 - Optical disk device and track-on method thereof An optical disk device includes a pickup head, a thread motor, and a drive controller, and a thread drive IC. The drive controller supplies directed voltage to the thread drive IC. The thread drive IC in response supplies drive voltage to the thread motor, which moves the pickup based on ... 01/05/06 - 20060002247 - Optical pickup and optical recording and/or reproducing apparatus adopting the same An optical pickup and an optical recording and/or reproducing apparatus adopting the same are provided. The optical pickup includes an optical unit, first and second objective lenses, and an optical path switching unit. The optical unit illuminates light onto an information storage medium and receives light reflected from the information ... 12/29/05 - 20050286352 - Lens driving unit In a lens driving unit, when a first lens group holder 10 has received an impact from external in a use state in which first, second lens group holders 10, 11 are projecting, the first lens group holder 10 and the first nut 16 are released from their coupling by ... 12/08/05 - 20050270912 - Optical pickup and apparatus for recording and/or reproducing optical recording medium The present invention provides an optical pickup in which light beams of different wavelengths, radiated from plural light sources and reflected back from a recording surface, are condensed in the same area. The optical pickup records and/or reproduces each of a plurality of optical recording mediums having different protective substrate ... 12/01/05 - 20050265136 - Feedback control system and method thereof A feedback control system includes an optical pickup head, a temperature sensor, a microcontroller and a servo control system. The optical pickup head emits a laser beam onto an optical disk to read/write data. The temperature sensor senses an operating temperature of the optical pickup head, and outputs a corresponding ... 11/10/05 - 20050249054 - Optical pickup and disc drive device An objective lens driving device is to be improved in sensitivity and reduced in size and thickness. To this end, an objective lens driving device includes a stationary block arranged on a stationary plate provided on a movable base, a movable block holding an objective lens and moved along the ... 10/27/05 - 20050237869 - Recording and/or reproducing apparatus A disc recorder/player that prevents foreign matter such as dust or the like from adhering to a drive shaft for assuring a highly accurate position control of the movable write and/or read unit. In the disc recorder/player, an electromechanical transducer is used as a drive source provided in a feeding ... 10/27/05 - 20050237868 - Optical pickup device An optical pickup device comprises a light emitting element for emitting a laser beam, and a housing in which the light emitting element is mounted, wherein the light emitting element is contained in a holder for protecting the light emitting device, the holder including a projecting portion for dissipating heat ... 10/20/05 - 20050232095 - Optical pickup device A grounded pickup body 40 and a flexible-printed circuit board (FPC) are provided 10. On the reverse side of the FPC 10, a plurality of protruding lands 30 is connected to a ground pattern. The FPC 10 is wrapped around the pickup body 40, and a part of the FPC ... 10/20/05 - 20050232094 - Driving device and an optical apparatus A driving device is provided with a piezoelectric actuator, a magnetic field generating member integrally attached to a movable member of the piezoelectric actuator and having a surface magnetic flux density that changes along advancing and retreating directions of the movable member, a magnetic field detector for detecting a magnetic ... 09/15/05 - 20050201219 - Optical head device An optical head device includes a plurality of laser light sources emitting laser beams with different wavelengths, a common light receiving element for signal detection which is provided with a light receiving surface, and an optical system which guides the laser beams emitted from the plurality of laser light sources ... 09/15/05 - 20050201218 - Optical scanning device An optical scanning device for scanning an information layer of an optical record carrier and including a rotary aim (2; 102; 202; 302; 402; 502) which is arranged to swing about a rotation axis (CR) to alter an angular position of the rotary arm about the rotation axis; a detector ... 08/11/05 - 20050174899 - Optical pickup system and disk drive with the same A optical pickup system for use in a disk drive includes a stepping motor, a lead screw supported by a bracket and coupled to the stepping motor, in which the lead screw has spiral grooves formed on an outer periphery of the lead screw and engaged to a slider to ... 08/04/05 - 20050169128 - Optical head The present invention realizes a compact and thin light-receiving device in a simple configuration, and provides a compact optical head on which this light-receiving device is mounted. The light-receiving device for receiving light reflected from an information recording medium includes a light-receiving chip having a plurality of electrodes and a ... 07/28/05 - 20050162993 - Lensless optical servo system for an optically assisted disk drive A lensless optical servo system (100) has an unfocused light source (102) and patterned photodetectors (104, 106, 108). The unfocused light is reflected by the markings on an LS-120 disk (40) and the reflected light carries the pattern of the markings the considerable distance in its far-field to the photodetectors ... 07/21/05 - 20050157607 - Tracking error control system and method A tracking error control system includes a tracking error signal generator in communication with an optical pickup head, a DC detector in communication with the tracking error signal generator and a comparator in communication with the DC detector and the tracking error signal generator. The operating optical signals received by ... ### FreshPatents.com Support - Terms & Conditions |