Class / Patent application number | Description | Number of patent applications / Date published |
720659000 | Having power driven optical transducer assembly | 40 |
20080244631 | OPTICAL READ/WRITE DEVICE - According to one aspect, an optical read/write device for reading and/or writing an optical disk includes a rack disposed between the worm gear and the optical pickup head for transferring motion from the worm gear to the optical pickup head. The rack includes a fastening portion for fixing the rack to the optical pickup head, an engaging portion, a spring placed between the fastening portion and the engaging portion for pressing the engaging portion to engage with the worm gear, and a connecting portion. The connecting portion is configured for connecting the fastening portion and the engaging portion and preventing the engaging portion from disengaging from the worm gear. | 10-02-2008 |
20090064215 | Power transmission member for head movement mechanism, and disk device equipped with the head movement mechanism - A power transmission member is provided with which it is possible to lessen the impact force produced when the head of a disk device hits part of a base member or the like. The power transmission member is a power transmission member of a mechanism for moving a head, used for recording on or reproducing from a disk, relative to a base member in a disk device, comprising a fixed component for attaching to a head, a power transmission component for receiving drive from a motor serving as a drive source, a linking component for linking the fixed component and the power transmission component, and a contacting component. The contacting component is fixed to the power transmission component, and comes into contact with part of the base member, or part of a member fixed to the base member, at least one end of the movement range of the head. The contacting component is also linked to the fixed component via the linking component in a state in which elastic deformation is possible only when an impact or the like creates an excessive force in the movement direction of the head. | 03-05-2009 |
20090094626 | INFORMATION PROCESSING DEVICE AND METHOD, AND PROGRAM - An information processing device for performing calibration of an optical output level control unit for controlling the optical output level of a laser beam which an emission unit emits by multiple channels controlling the current value of current supplied to the emission unit for emitting a laser beam with an optical output level according to the current value, includes a calibration unit for performing calibration processing for each of the multiple channels of the optical output level control unit wherein the emission unit is controlled to emit the laser beam with multiple different optical output levels, the optical output level control unit is controlled to detect the indicating value of the current value corresponding to each optical output level, the relation between the indicating value and the optical output level is obtained, and an indicating value corresponding to a target optical output level is adjusted according to the relation. | 04-09-2009 |
20090138901 | OPTICAL PICKUP, OPTICAL ELEMENT, OPTICAL INFORMATION DEVICE, COMPUTER, OPTICAL INFORMATION MEDIUM PLAYER, CAR NAVIGATION SYSTEM, OPTICAL INFORMATION MEDIUM RECORDER AND OPTICAL DISK SERVER - An optical pickup includes: a laser light source which outputs an divergent beam having an elliptical far-field pattern; a beam shaping element having at least one cylindrical plane and which shapes the divergent beam outputted from the laser light source into an divergent beam having a prescribed shape in which at least the length in the major axis direction of the elliptical shape is shortened; a light collecting portion having a beam splitter which perpendicularly collects the divergent beam that is outputted from the beam shaping element and which has a prescribed shape on the recording surface of an optical disk, and a mirror or the like; and a light detecting portion The optical axis of the divergent beam is rotated so that the direction in which the major axis of the divergent beam having a prescribed shape is shortened conforms to the radial direction of an optical information recording medium. | 05-28-2009 |
20090249378 | Information processing device and method, program, and recording/reproducing device - An information processing device includes: a correction coefficient holding unit configured to hold a correction coefficient which is a ratio between the position of a control target at a start time of control operation, and a detection signal indicating the control result of the control target; an initial-value-compensation matrix holding unit configured to hold an initial-value-compensation matrix for performing compensation of the initial value of a control computing unit for computing control output for controlling the control target from the detection signal based on the position and speed of the control target; and an initial-value generating unit configured to correct the position and speed of the control target at a start time of control operation with the correction coefficient, and employ the position and speed of the control target after correction, and the initial-value-compensation matrix to generate an initial-value-compensation value for compensating the initial value of the control computing unit. | 10-01-2009 |
20100162280 | CASCADED CONTROL OF A PICK-UP HEAD FOR MULTI-LAYER OPTICAL DATA STORAGE - A system and method of controlling position of a pick-up head of an optical drive, including manipulating the position of the pick-up head as a primary variable in a cascade control scheme, and manipulating current flowing through the pick-up head as a secondary variable in the cascade control scheme. | 06-24-2010 |
20110161994 | OPTICAL DISC DEVICE AND CONTROL METHOD OF OPTICAL DISC - An optical disc device comprising: a controller for reading data from an optical disc having a plurality of recording layers, wherein: the controller, in shifting a focus of the laser light from a first layer to a second layer, performs a first change that changes a setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to suppress peak power of the drive signal if a light density of the second layer is higher than a light density of the first layer; the controller shifts the focus from the first layer to the second layer; and the controller, after the focus has been shifted, performs a second change that changes the setting on the high frequency signal to a predetermined value at which the high frequency signal is superimposed to increase the peak power of the drive signal. | 06-30-2011 |
20110265105 | OPTICAL COLLIMATOR ASSEMBLY AND OPTICAL PICKUP DEVICE INCLUDING THE SAME - An optical collimator assembly used in an optical pickup device and an optical pickup device are provided. The optical collimator assembly may include a collimating lens, a lens holder for supporting the collimating lens, a piezoelectric element coupled to the lens holder and including a female screw portion disposed along a central axis in one direction and a plurality of pairs of piezoelectric bodies disposed symmetrically with one another around the central axis and for causing deformation in a direction that crosses the central axis, and a male screw type transfer screw coupled to the female screw portion of the piezoelectric element. | 10-27-2011 |
20110307909 | METHOD FOR REDUCING A NUMBER OF INPUT TERMINALS OF AN AUTOMATIC POWER CONTROL CIRCUIT, AND ASSOCIATED AUTOMATIC POWER CONTROL CIRCUIT - A method for reducing a number of input terminals of an APC circuit is provided, where the APC circuit is arranged to control an optical pickup unit (OPU) within an optical storage device. The method includes: utilizing at least one switching module to ground one of a first and a second input terminals of the APC circuit at a time; and utilizing the switching module to electrically connect an APC front end within the APC circuit to a non-grounded input terminal of the first and the second input terminals, in order to receive a detection signal of a photo diode of the OPU through the non-grounded input terminal at the time. An associated APC circuit is also provided. | 12-15-2011 |
20130014135 | OPTICAL DISC DRIVING DEVICE AND WIRING STRUCTURE - An optical disc driving device having a metallic exterior casing and an internal unit to be housed in the exterior casing, the internal unit further including an optical pickup unit for performing recording or reproduction of information signals on an optical disc, and a printed wiring substrate on which a connector electrically connected to the optical pickup unit and serving for transmission and reception of electrical signals from and to external electronic equipment via an external-connection cable is mounted, wherein the exterior casing has an opening for allowing the connector to be projected outside, the connector is so provided as to be connected to the external-connection cable in a direction that orthogonally crosses with a projecting direction of the connector from the opening, and the external-connection cable is so provided as to extend from the connector along a surface of the exterior casing. | 01-10-2013 |
20130081069 | DRIVING CIRCUIT FOR STEPPING MOTOR - A stepping-motor-driving circuit for an optical pickup: includes a control-signal-generating circuit to generate a plurality of control signals for supplying driving currents to driving coils having a plurality of phases during energized periods, with a de-energized period therebetween; a plurality of output circuits to supply the currents to the respective coils, in response to the signals; an induced-voltage-detecting circuit to compare a voltage generated each in the coils with a threshold voltage during the de-energized period; a threshold-voltage-setting circuit; and a determining circuit to determine whether a collision state is present where the pickup reaches an end of a movement range, based on an induced-voltage-detecting-circuit-detection result, the threshold voltage set at a voltage between a voltage generated each in the coils during the de-energized period when the stepping motor stops or rotates in the state, and a voltage generated therein in the de-energized period when no collision state is present. | 03-28-2013 |
20130205309 | PHOTODECTOR UNIT, OPTICAL PICKUP INCLUDING THE PHOTODECTOR UNIT, AND OPTICAL SYSTEM INCLUDING THE OPTICAL PICKUP - Provided is a photodetector unit including a photodetector integrated circuit (PDIC). The photodetector may reduce a height of a conventional optical pickup by improving the input/output terminals of the PDIC and accordingly improving the contact points and wires of a corresponding printed circuit board (PCB). | 08-08-2013 |
20140245333 | APPARATUS AND METHOD FOR FOCUSING A LASER BEAM ON AN OPTICAL DISC - Provided are a method and apparatus for focusing a laser beam on an optical disc. According to various aspects, the apparatus may include an objective lens which has a numerical aperture below what is standardized for the optical disc. In addition, a collimating lens which is used to focus a laser beam on the objective lens may be positioned at a fixed location. Despite the fixed location, the apparatus may support data recording/reproducing on multiple layers of the optical disc. | 08-28-2014 |
20140325536 | OBJECTIVE LENS DRIVING UNIT AND OPTICAL DISC DRIVE USING THE SAME - Provided is an objective lens driving unit in which a wire holder is coupled to a circuit board. In a conventional objective lens driving unit, a connection between a wire holder and a circuit board may deteriorate over time due to a deterioration of the connection. According to various aspects, a wire holder may be directly coupled to a circuit board by insert molding, thus improving the connection between the wire holder and the circuit board over time. | 10-30-2014 |
20160042756 | OPTICAL INFORMATION PLAYBACK DEVICE AND ADJUSTMENT METHOD - The objective of the present invention is, using an optical system which performs adjustment, to allow a reference beam optical system to be adjustable with high accuracy. The present invention is an optical information reproduce device which reproduces back information that has been recorded using angle-multiplexing holography on an optical information recording medium, said optical information reproduce device being provided with: a light source for generating a reference light; a first actuator which varies the angle of the reference light that is incident to the optical information recording medium; phase conjugate generation means configured by combining a condenser lens which generates phase-conjugated beams of light that has been transmitted through the optical information recording medium, and a movable mirror; a second actuator which drives the movable mirror; and a reference light measurement unit which measures divergence and convergence of the reference light from the phase conjugate generation means. | 02-11-2016 |
720660000 | Sensor detecting position of optical transducer | 7 |
20080295124 | DETECTION METHOD FOR TILT OF OPTICAL PICKUP HEAD | 11-27-2008 |
20090055849 | Angle sensor with multi-turn encoding - An angle sensor includes a rotary disc provided with an annular surface divided into cells for encoding the angular position of the disc, the said cells transforming an incident light beam into an optical light signal conveying a code of the said angular position, the said signal being conducted by a light guide to a fixed photodetector connected to means for processing of the said code. | 02-26-2009 |
20090113463 | Optical Disk Reproducing Device - The present invention is directed to an optical disk reproducing device including an external optical disk drive and a detachable module. The external optical disk drive reproduces data from the optical disk. The detachable module has an audio output or video output connector. Besides, the external optical disk drive has a first connector and the detachable module has a corresponding second connector. The detachable module is connected with an audio output device or a video output device via the audio output connector or the video output connector respectively. After data is processed in the external disk drive, the data is sent to the control chip for further processing. The data processed by the control chip is sent to the audio output device or the video output device. | 04-30-2009 |
20110258646 | OPTICAL PICKUP SUPPORTING DEVICE AND OPTICAL DISC APPARATUS INCLUDING THE SAME - Provided is a low-cost, high-accuracy optical pickup supporting device by simplifying a structure for fixing guide shafts to a chassis. To this end, an optical pickup supporting device includes: a frame-shaped chassis; a first guide shaft and a second guide shaft, two ends of each of which are fixed to the chassis; an optical pickup device movably supported by the two guide shafts; and a spindle motor fixed to the chassis with a motor supporting member interposed in between. Furthermore, in a first fixation region in which the first guide shaft is fixed to the chassis, the position of the first guide shaft is fixed with higher accuracy by: a fixation area obtained by protruding parts of the chassis; and a position regulating portion which is a part of the motor supporting member. | 10-20-2011 |
20120246665 | Optical Pickup Assembly - An optical pickup assembly that has flexible beams that support an objective lens for adjustment in a focusing direction and a tracking direction. The flexible beams are used to support and move the objective lens. A controller operates electromagnetic actuators that move the flexible beams. | 09-27-2012 |
20140115613 | OPTICAL DISC DEVICE AND CONTROLLING METHOD THEREOF - An optical disc device includes a pickup, a driving mechanism that drives the pickup, and a driving controlling portion that applies an initial driving voltage to the driving mechanism over a specific time interval up until the pickup arrives at an outermost position on an outer peripheral side, the initial driving voltage causing the pickup to arrive at the outermost position. After the specific time interval has elapsed, the driving controlling portion applies, to the driving mechanism, an adjustment driving voltage of a voltage amplitude less than a voltage amplitude of the initial driving voltage or a driving frequency less than a driving frequency of the initial driving voltage. | 04-24-2014 |
20140223456 | WOBBLE DETERMINING APPARATUS AND METHOD, OPTICAL DISK DEVICE, AND COMPUTER PROGRAM - A wobble determining apparatus is provided with: a calculating device for calculating (i) a first time required until reaching a number of revolutions of a motor which allows a predetermined linear velocity, and (ii) a second time required to move an optical head to a position which allows the predetermined linear velocity, on the basis of the number of revolutions of the motor and the position of the optical head; a judging device for judging whether to keep the optical head in accordance with the calculated first time and the calculated second time; and a controlling device for controlling a moving device not to move the optical head if it is judged to keep the optical head, and for controlling the moving device to move the optical head to the position which allows the predetermined linear velocity if it is judged not to keep the optical head. | 08-07-2014 |
720661000 | Single motor drives optical transducer and at least one other component | 4 |
20090125927 | Optical Disk Apparatus - A traverse chassis supported in a swingable manner with respect to the main chassis and a disk transport plate provided along an opening are provided in the main chassis. The transport plate has a base part having a slender rectangular shape in plan view and a transport roller provided in the surface of the base part so as to extend in the longitudinal direction of the base part. The transport roller is provided such that its rotationally-moving shaft extends in parallel to an X direction, and an optical disk mounted on these components is loaded into or unloaded from an optical disk apparatus by rotation of the transport roller. | 05-14-2009 |
20110219390 | Integrated Disk Driving Module - An integrated disk driving module is disclosed, the module including a base unit including a stepping motor fixture bent from an upper plate toward an accommodation space, wherein the stepping motor fixture is integrally formed with the upper plate, and a stepping motor rotatably fixed to the stepping motor fixture. | 09-08-2011 |
20110219391 | INTEGRATED DISK DRIVING MODULE - An integrated disk driving module is disclosed, the module including a base unit including a spindle motor fixture including an opening-formed upper plate, a lateral surface plate bent from the upper plate to form an accommodation space, and a spindle motor fixture concavely formed from the upper plate toward the accommodation space, wherein the spindle motor fixture is integrally formed with the upper plate; and a spindle motor fixed inside the spindle motor fixture to rotate a disk. | 09-08-2011 |
20110231866 | MOTOR - There is provided a motor for a disk drive apparatus. The motor includes a cone member, a substantially annular back yoke, a substantially annular clamp magnet, an adhesive agent, and a motor unit. A storage portion includes a clamper insertion portion formed in a position axially overlapping with the clamp magnet to accommodate the clamper when the clamper comes closer to the cone member. The back yoke includes a first surface opposed to the clamp magnet in a contact or adjoining relationship therewith and a second surface positioned near the clamper insertion portion and kept spaced apart from the clamp magnet. The cone member includes an adhesive agent staying portion arranged to accommodate a part of the adhesive agent. The adhesive agent stays portion being defined between the imaginary surface extending axially downwards from the circumferential surface of the clamp magnet facing the clamper insertion portion. | 09-22-2011 |
720662000 | Arcuate transducer assembly movement | 4 |
20130185742 | OPTICAL PICKUP AND OPTICAL SYSTEM USING THE SAME - Provided are an optical pickup and an optical system using the same. The optical pickup may include an aperture that is disposed at a side where a light beam is incident on an objective lens. The aperture may limit a range of the light beam such that a width of the light beam incident on the objective lens in a first direction is less than a width in a second direction that is perpendicular to the first direction. | 07-18-2013 |
20130239131 | MOTOR HAVING A DISK SUPPORT MEMBER AND A DISK DRIVE DEVICE HAVING THE SAME - A motor including: a rotor case having a chucking device, on which a disk is mounted, press-fitted and coupled thereto; disk support members mounted on an upper surface of the rotor case to support a bottom surface of the disk, and having each of flow path portions therebetween allowing for airflow in a space between the disk and the rotor case; and a push portion disposed in at least one of the rotor case and the disk support members to accelerate the airflow through the flow path portions when the rotor case rotates. | 09-12-2013 |
20130305268 | OPTICAL PICKUP DEVICE - An optical pickup device includes: a carriage moveably supported on an upper surface of a mount base and holding a light source, a light condensing member and optical components guiding the laser light from the light source to the light condensing member; a wiring member connected to the light source to supply electric power thereto; and a protection cover covering the upper surface of the mount base and a part of the wiring member and is provided with an opening through which the laser light passing through the light condensing member is irradiated onto the optical disk. The light source, light condensing member and optical components are located within a region obtained by projecting the opening in a direction perpendicular to a disk surface of the optical disk, and at least one of the light source, light condensing member and optical components protrudes into the opening in the protection cover. | 11-14-2013 |
20140053169 | OBJECT LENS DRIVING DEVICE AND OPTICAL DISC DRIVE INCLUDING THE SAME - Provided is an object lens driving device that includes a wire holder coupled to a support portion and on which an end of a plurality of suspension wires are fixed. The wire holder includes a first area supported on the support portion and a second area extending from the first area and on which the end of each of the plurality of suspension wires is fixed. In this example, a thickness of the second area is thinner than a thickness of the first area. | 02-20-2014 |
720663000 | Linear transducer assembly movement | 10 |
20110197211 | OPTICAL DISC DRIVE - In an optical disc drive, a degradation of traveling performance of an optical pickup under hard acceleration or hard deceleration in a random access operation or the like results in a degradation of recording/reproducing performance. Groove structure is provided between two gears of a guide feed provided in an optical pickup, and the groove forms bending structure. Thus, the engagement state between a screw gear and the gears of the guide feed is stabilized. This makes it possible to prevent tooth jumping and step-out from occurring in the gears during the traveling of the optical pickup, achieving stable traveling. In consequence, the recoding/reproducing performance of the optical disc drive can be improved. | 08-11-2011 |
20110219392 | INTEGRATED DISK DRIVING MODULE - An integrated disk driving module is disclosed, the module including a base unit formed with a first motor fixture concavely formed on an upper plate, and a second motor fixture bent from the upper plate in opposition to the first motor fixture, wherein the first and second motor fixtures are integrally formed on the upper plate; a spindle motor secured inside the first motor fixture to rotate a disk; and a stepping motor rotatably secured to the second motor fixture. | 09-08-2011 |
20110258647 | OPTICAL PICKUP FEEDING DEVICE AND OPTICAL PICKUP SUPPORTING DEVICE INCLUDING THE SAME - Multiple regulating portions protruding more than tooth portions of the rack are provided in positions, between which a feed shaft is interposed, in the vicinity of the tooth portions. Each regulating portion has an inclined surface which is opposed to a periphery of the feed shaft, and which is isolated more from the feed shaft as the inclined surface becomes farther from arm portions. Thereby, it is possible to restrain thin portions of the rack from twistedly deforming when the tooth portions come out of mesh with a groove of the feed shaft. In addition, it is possible to prevent the rack from coming off the feed shaft to a large extent. | 10-20-2011 |
20120174138 | ELECTROMAGNETIC ACTUATOR OF OPTICAL PICKUP HEAD - An electromagnetic actuator is provided, including an object lens holder hanged by a set of wires forming suspended object. A focus coil set is fixed to object lens holder and placed surrounding focus and track shared magnet set. The focus coil located between object lens holder and focus and track shared magnet set is within magnetic field of focus and track shared magnet set. The focus coil located between tilt magnet set and magnetic field of focus and track shared magnet set is within the effective field of tilt magnet set and focus and track shared magnet set due to shielding effect of the yoke protruding plates. When a current runs through focus coil, a magnetic force in the focus direction is induced simultaneously within the range of tilt magnet set and focus and track shared magnet set so that object lens holder can focus. | 07-05-2012 |
20120180078 | DISC CHUCKING APPARATUS, MOTOR AND DISC DRIVING DEVICE EQUIPPED WITH MOTOR - The present invention relates to a disc chucking apparatus having claws that horizontally move and provide elasticity to improve performance in centering and chucking a disc. The disc chucking apparatus includes: a centering base to which an inner circumferential surface of a disc is fixed; a plurality of chuck chips arranged at regular intervals along an outer circumferential surface of the centering base; and a plurality of elastic support parts disposed to be opposite to the chuck chips on the centering base, rotating horizontally when the disc is mounted, and pressing the inner circumferential surface of the disc in an outer diameter direction thereof. | 07-12-2012 |
20120227062 | OPTICAL PICK-UP HEAD MODULE - An optical pick-up head module includes a base, an optical pick-up head adjusting mechanism, two guiding rods, a spring and an optical pick-up head slidably disposed on the guiding rods. The optical pick-up head adjusting mechanism includes a protrusion, a pillar and an adjusting element. The protrusion connected to the base has a sliding slot. The pillar having first and second flat surfaces is slidably disposed in the sliding slot. The first flat surface contacts an inner wall of the sliding slot. The adjusting element is screwed on the base. The spring disposed on the base pushes the pillar to contact the adjusting element by the second flat surface. When the adjusting element is rotated, the adjusting element pushes the pillar toward the base. | 09-06-2012 |
20120291055 | Suspension System for an Optical Pickup Assembly - A suspension system is provided for an objective lens housing. The objective lens housing is supported by the suspension system and is moved in either a tracking direction Y or focusing direction Z by an electro-magnetic actuator. The objective lens housing is supported by upper and lower suspension springs. The suspension springs are moveable in the tracking direction by flexing the suspension springs and are moveable in a focusing direction by compressing a front portion and a back portion to fold the suspension spring at bends formed in an intermediate portion of the suspension springs. | 11-15-2012 |
20150033244 | Actuator, Optical Pickup, and Disc Apparatus - Provided is an actuator, an optical pickup, and a disc apparatus, with improved assembling workability and reduced manufacturing cost. The actuator of the optical pickup of the disc apparatus includes a movable part and a fixed part supporting the movable part in a movable manner. The movable part includes a case and a plurality of drive substrates having the same specification. The drive substrates are disposed at positions opposed to each other with respect to the case. Each drive substrate includes a winding member for driving the movable part and a wiring pattern for supplying current to the winding member. The wiring pattern includes a plurality of electrodes and a conductive path. The electrodes are disposed at positions opposed to each other with respect to the winding member. The conductive path is branched from one end of the winding member and is connected to the electrodes. | 01-29-2015 |
720664000 | Rack gear | 1 |
720665000 | Backlash prevention | 1 |
20080222667 | OPTICAL RECORDING AND/OR REPRODUCING DEVICE - According to one aspect, an optical recording and/or reproducing device for reading and/or writing an optical disc includes a base, optical pickup head, and a moving mechanism for slidably moving the optical pickup head. The moving mechanism includes a worm gear, a motor for rotating the worm gear, and a rack disposed between the worm gear and the optical pickup head for transferring motion from the worm gear to the optical pickup head. The rack includes a fastening portion for fixing the rack to the optical pickup head, an engaging portion for engaging with the worm gear, a restricting portion connected to the engaging portion for preventing the engaging portion from running out of the worm gear, and a connecting portion for connecting the fastening portion with the restricting portion. | 09-11-2008 |
720666000 | Voice coil | 1 |
20110179431 | LINEAR MOTOR FOR LASER BEAM RECORDER - A linear motor for a laser beam recorder for mastering of optical media. The linear motor has a base and an actuator, the actuator being mounted to the base in a flexible way, such as via a leaf spring. The actuator may have a balance mass as a counter mass. The balance mass is preferably formed by an essential component of the linear motor. | 07-21-2011 |