| Entries |
| Document | Title | Date |
|---|
| 20080222668 | Spindle motor and player - A spindle motor includes a rotor made of metal including a substantially circular top surface section and a tubular skirt section arranged at a predetermined space from an outer periphery of the top surface section and a disk table of synthetic resin outsert-molded in the rotor and including a table main body section located on an outer surface side of the rotor and a rotor-inner-surface superimposing section located on an inner surface side of the rotor. First resin lead-in holes are provided in the tubular skirt section and an inner surface of the table main body section located on the outer surface side of the rotor is connected to the rotor-inner-surface superimposing section located on the inner surface side of the rotor through the first resin lead-in holes. | 09-11-2008 |
| 20080229347 | OPTICAL READ/WRITE DEVICE - According to one aspect, an optical read/write device for reading and/or writing an optical disc includes a base, optical pickup head, and a driving mechanism for slidably driving the optical pickup head. The driving 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, a mesh portion for engaging with the worm gear, a restricting portion connected to the mesh portion for being blocked by the gear seat when the mesh portion is pressed by the worm gear to prevent the mesh portion from disengaging from the worm gear, and a connecting portion for connecting the fastening portion with the restricting portion. | 09-18-2008 |
| 20090013342 | Multiple positioner data storage device - A data storage device having at least one rotatable disk and at least one actuator arm assembly for writing data onto the disk and reading the data recorded on the disk is provided. The data storage device comprises a first plate with the spindle motor being secured only to the first plate. A first actuator arm assembly is secured only to the first plate. A second plate is secured to the first plate. A second actuator arm assembly secured only to the second plate. | 01-08-2009 |
| 20090049463 | MOTOR DRIVING DEVICE, AND MOTOR DRIVING METHOD - A motor driving device generates a first PWM control signal for PWM driving each phase ( | 02-19-2009 |
| 20090055851 | OPTICAL PICKUP DEVICE, OPTICAL INFORMATION DEVICE PROVIDED WITH SUCH OPTICAL PICKUP DEVICE, AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE PROVIDED WITH SUCH OPTICAL INFORMATION DEVICE - A protruding portion | 02-26-2009 |
| 20090144762 | Method for determining size of optical disc inserted into optical disc drive - A method of determining a size of an optical disc inserted into an optical disc drive is disclosed. The method includes driving a turntable motor of the optical disc drive to rotate the optical disc at a predetermined rotation frequency for reading data stored on the optical disc, measuring a rotation frequency of the turntable motor, applying a kick-pulse voltage to the turntable motor of the optical disc drive for a predetermined period of time, measuring a change in the rotation frequency of the turntable motor after applying the kick-pulse voltage, comparing the change in the rotation frequency of the turntable motor to a threshold value, and determining that the optical disc is an 8 cm disc when the change in the rotation frequency of the turntable motor is above the threshold value. | 06-04-2009 |
| 20090183189 | SPINDLE MOTOR CONTROLLING METHOD AND OPTICAL DISK DRIVE USING THE SAME - An optical disk drive includes a spindle motor, a power source, a microprocessor, and a comparator. The spindle motor is for supporting a disk. The power source supplies a first voltage to drive the spindle motor to rotate. The microprocessor signals the power source to supply a second voltage to slow down rotational speed of the spindle motor when receiving a power-off signal. The comparator compares the rotational speed with a predetermined value. The microprocessor signals the power source to stop supplying power to the spindle motor when the rotational speed is smaller than the predetermined value. A controlling method for controlling the spindle motor in the optical disk driver is also provided. | 07-16-2009 |
| 20090183190 | LASER PROCESSING METHOD - In a laser processing method, a workpiece is set with respect to a jig having a laser passage hole and a relative position of the jig and the workpiece is determined so that the laser passage hole can face toward a target processing point on the workpiece. Then, laser light is irradiated on the target processing point through the laser passage hole while creating a stream of an inert gas flowing from a peripheral area of the target processing point toward the target processing point and flowing away from the workpiece through the laser passage hole. | 07-16-2009 |
| 20090183191 | SPINDLE MOTOR - A spindle motor is provided. The spindle motor includes a rotation shaft rotatably installed, a stator around the rotation shaft, a rotor coupled to the rotation shaft, a turntable rotated with the rotation shaft, and a center guide member comprising a body coupled to the rotation shaft and a support rim extending from the body, the support rim can comprise a first sloped surface extending from an outer surface of the body and making an angle of about 47° to 53° with an imaginary vertical line parallel with the rotation shaft, and a second sloped surface extending from an end of the first sloped surface and making an angle of about 16° to 22° with an imaginary vertical line parallel with the rotation shaft. | 07-16-2009 |
| 20090288108 | OPTICAL DISK DEVICE AND ROTATION CONTROL METHOD - An optical disk device of the present invention includes a spindle motor, an optical pick-up, and a rotation control portion. The spindle motor is a rotational drive portion that rotates an optical disk, on an information recording surface of which a plurality of addresses are recorded. The optical pick-up records an information signal onto and plays back the information signal from the information recording surface of the optical disk that is rotated by the spindle motor. The rotation control portion controls the rotation of the optical disk by the spindle motor. In this case, the rotation control portion performs control based on a first reference signal that can be read off the optical disk, such that the optical disk is rotated at a speed that is based on a specified clock count. | 11-19-2009 |
| 20100083295 | INFORMATION RECORDING MEDIUM AND OPTICAL RECORDING/REPRODUCING APPARATUS - When a super resolution technology for optical disks is used in a situation where optical disk management information is formed with a signal that cannot be reproduced by a reproduction method based on a conventional optical disk technology, optical disk drives cannot make recording adjustments and/or reproduction adjustments. | 04-01-2010 |
| 20100211964 | SPINDLE MOTOR AND OPTICAL DISC DRIVE HAVING THE SAME - A spindle motor includes a base plate, a stator, and a rotor. The base plate has a plurality of air-guiding holes. The stator includes a bearing portion and a plurality of coil portions. The bearing portion is fixed on the base plate. The coil portions are connected to and surrounded the bearing portion, and are disposed above the air-guiding holes. The rotor is rotatably mounted to the bearing portion and disposed adjacent the coil portions. | 08-19-2010 |
| 20100262981 | Optical storage medium, optical read/write apparatus, and optical read/write method - An optical read/write apparatus causes a read/write light beam from illuminating means to strike only one side of an optical storage medium including stacked data storage layers each of which is readable/writeable separately from the other layers. In this case, the optical read/write apparatus operates so that data is read/written from/into a second data storage layer after fully recording a recordable area of a first data storage layer. Thus, light can be shone with uniform intensity across the substantially entire recordable area of the second data storage layer without using a complex read/write system even under such conditions that the transmittance to light of the first data storage layer in the recordable area may vary depending on whether any data is recorded in the recordable area. | 10-14-2010 |
| 20100262982 | Optical storage medium, optical read/write apparatus, and optical read/write method - An optical read/write apparatus causes a read/write light beam from illuminating means to strike only one side of an optical storage medium including stacked data storage layers each of which is readable/writeable separately from the other layers. In this case, the optical read/write apparatus operates so that data is read/written from/into a second data storage layer after fully recording a recordable area of a first data storage layer. Thus, light can be shone with uniform intensity across the substantially entire recordable area of the second data storage layer without using a complex read/write system even under such conditions that the transmittance to light of the first data storage layer in the recordable area may vary depending on whether any data is recorded in the recordable area. | 10-14-2010 |
| 20100262983 | Optical storage medium, optical read/write apparatus, and optical read/write method - An optical read/write apparatus causes a read/write light beam from illuminating means to strike only one side of an optical storage medium including stacked data storage layers each of which is readable/writeable separately from the other layers. In this case, the optical read/write apparatus operates so that data is read/written from/into a second data storage layer after fully recording a recordable area of a first data storage layer. Thus, light can be shone with uniform intensity across the substantially entire recordable area of the second data storage layer without using a complex read/write system even under such conditions that the transmittance to light of the first data storage layer in the recordable area may vary depending on whether any data is recorded in the recordable area. | 10-14-2010 |
| 20100287577 | OPTICAL DISK DRIVE WITH ROTARY LOAD/EJECT MECHANISM AND RELATED COMPUTER DEVICE - An optical disk drive includes a bracket, and a mecha module installed on the bracket. The mecha module includes a mounting plate fixed on the bracket, an optical pick-up head installed on the mounting plate in a slidable manner for reading or writing data in an optical disk, and a spindle motor installed on the mounting plate for rotating the optical disk. The optical disk drive further includes a rotary mechanism connected to the bracket and a base for driving the bracket to rotate into or out of an opening on a housing relative to the base. | 11-11-2010 |
| 20100319012 | Spindle Motor Assembly With Encoder - The present invention provides a spindle motor assembly with an encoder. The spindle motor includes a circuit board, a spindle motor and an encoder. A connector is mounted on the upper surface of the circuit board. The spindle motor is provided on the circuit board. The spindle motor functions to rotate a disk placed thereon. The encoder is provided on the connector and senses a detection mark of the disk and thereby detects a rotating speed of the disk. As such, because the encoder is installed on the connector, the number of components is reduced, and the production cost can be thus reduced. | 12-16-2010 |
| 20110010731 | TRANSPORTATION BODY FOR FLEXIBLE OPTICAL DISK, OPTICAL DISK TRANSPORTATION APPARATUS, AND OPTICAL DISK TRANSPORTATION METHOD - A transportation body | 01-13-2011 |
| 20110023056 | Spindle Motor - Disclosed is a spindle motor comprising: an integral turntable including: a table on which a rotating body to be installed, and an inner side wall and an outer side wall formed to be recessed upwards at a portion therebetween on a lower surface of the table so that a predetermined hollow is formed, a surface of thereof being formed slant; a ball cover for covering a ball inserted into the hollow and the hollow; a rotation shaft an upper portion of which is inserted into a center of the integral turntable; a bearing supporting a lower portion of the rotation shaft; a coil formed on an outside of the rotation shaft; and a magnet formed on an outside of the coil. | 01-27-2011 |
| 20110035763 | TURNTABLE - A turntable for storage disk drive apparatuses includes a plate member made of a ferromagnetic material and a central resin member arranged at the center of the plate member and formed by injection-molding a resin. The central resin member includes a disk guide portion provided on an upper surface thereof to guide a central hole of a disk and a plurality of gate recess portions indented upwards from a lower surface of the central resin member. The gate recess portions include ceiling surfaces positioned higher than the plate member. The ceiling surfaces include a plurality of gate cut portions formed in an injection molding process. | 02-10-2011 |
| 20110041145 | Spindle motor for optical disc drive - The present invention provides a spindle motor for an optical disc drive. The spindle motor comprises a turntable unit and an anti-slipping element. The turntable unit has a disc mounting stand, which has a first outer diameter. The anti-slipping element is disposed on said turntable unit and has a first inner diameter, wherein the difference between the first outer diameter and the first inner diameter is less than or equal to 8 mm. | 02-17-2011 |
| 20110047560 | MOTOR, STORAGE DISK DRIVE APPARATUS AND MOTOR MANUFACTURING METHOD - A motor includes a stationary unit, a bearing mechanism, a rotary unit, and a chucking device. The rotary unit includes a rotor yoke provided with a cover portion extending around the chucking device and designed to allow the storage disk to be directly or indirectly mounted thereto and a removal-preventing member fixed to the cover portion to prevent removal of the rotary unit from the stationary unit. The removal-preventing member made of metal. The removal-preventing member includes a removal-preventing portion, an upper fixing portion having a plurality of upper protrusions inserted into the through-holes of the cover portion and bent toward the upper surface of the cover portion, and a lower fixing portion making direct or indirect contact with the lower surface of the cover portion and cooperating with the upper fixing portion to fix the position of the removal-preventing portion in a direction parallel to the center axis. | 02-24-2011 |
| 20110047561 | MOTOR AND STORAGE DISK DRIVE APPARATUS - A motor includes a bearing mechanism, a stationary unit including a stator arranged radially outwards of the bearing mechanism, and a rotary unit supported by the bearing mechanism at the upper side of the stationary unit for rotation about a center axis with respect to the stationary unit. The rotary unit includes a substantially cylindrical closed-top rotor yoke having a cover portion arranged to cover the stator. The bearing mechanism includes a substantially cylindrical closed-bottom bush formed by a press work, a sleeve fixed inside the bush and provided with an upper portion protruding beyond the bush and a shaft inserted into the sleeve. An upper end of the bush is lower than or flush with an upper end of the stator in a direction parallel to the center axis. | 02-24-2011 |
| 20110055857 | MOVE-SLED-HOME DEVICE AND METHOD FOR USE IN OPTICAL DISC DRIVE - A move-sled-home device is used in an optical disc drive. The move-sled-home device includes a processing unit, a motor actuator, a sled, a sled motor, and a current-detecting unit. The processing unit outputs a control signal. The motor actuator generates a driving voltage according to the control signal. The sled motor generates a driving current according to the driving voltage to move the sled. The current-detecting unit is used for receiving and converting the driving current into an indicating signal, and issuing the indicating signal to the processing unit. During a move-sled-home action, the processing unit realizes a magnitude of the driving current according to the indicating signal, thereby determining whether the move-sled-home action is finished. | 03-03-2011 |
| 20110055858 | SPINDLE MOTOR - Disclosed is a spindle motor including a rotor yoke coupled with a rotation axis and having an optical disk mounted thereon; a clamp case that is arranged on the rotor yoke, inserted into an inner side of the optical disk and has a receiving groove formed on the side thereof; and a chuck clip having one side fixed to the clamp case corresponding to the receiving groove and the other side that elastically supports the inner side of the optical disk, the other side being corresponding to the one side. | 03-03-2011 |
| 20110078711 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An object of the invention is to provide an optical recording medium and an optical information device that enable to improve the quality of a servo signal and a reproduction signal. In the case where shape-wise thicknesses tr | 03-31-2011 |
| 20110138405 | OPTICAL INFORMATION REPRODUCING APPARATUS, INFORMATION REPRODUCING METHOD OF OPTICAL INFORMATION REPRODUCING APPARATUS, PROGRAM AND RECORDING MEDIUM - A deterioration of reproduction light is occurred by a laser drive current on which a high-frequency current is superimposed. The present invention, for example, is an optical information reproducing apparatus which irradiates a laser beam to an optical disc | 06-09-2011 |
| 20110202940 | MOTOR, DISK DRIVE APPARATUS AND MOTOR MANUFACTURING METHOD - A motor includes a turntable and a rotor holder unified with each other by insert-molding. The turntable includes a protrusion portion protruding radially outward beyond a cylinder portion and a substantially cylindrical covering portion extending downward from an radial inner end of the protrusion portion to cover an outer circumferential surface of the cylinder portion. The rotor holder has a radial outer end portion arranged in the same radial position as an outer circumferential surface of the covering portion or arranged radially inward of the outer circumferential surface of the covering portion. For this reason, a sliding contact area between a mold and the rotor holder is reduced. This helps suppress sliding contact between the mold and the rotor holder during a mold releasing process, consequently suppressing degradation of the mold. | 08-18-2011 |
| 20110247022 | OPTICAL DISC DRIVE - An optical disc drive for an electronic device is provided. The optical disc drive includes a rotating member, a spindle, a reading member and a controlling module. The rotating member includes a connecting member, and a first end fixed to a housing of the electronic device. The spindle is connected to a second end of the connecting member for rotating an optical disc arranged on the spindle. The reading member is fixed to the connecting member to read the optical disc. When a switch of the electronic device is actuated, a processing unit of the electronic device outputs a signal to the controlling module. The controlling module controls the rotating member to rotate. The connecting member moves the spindle and the reading member out of the housing, further controls the spindle to rotate the optical disc, and the reading member to read the optical disc. | 10-06-2011 |
| 20110258649 | DISC MOUNTING IN OPTICAL DISC DRIVES - The embodiments herein describe an apparatus and method for a reduced Z stack slot loading optical disc drive (ODD). In one embodiment a reduced Z stack height slot loading optical disc drive (ODD) is described. The reduced Z stack height ODD includes at least a hub/turntable arrangement having a hub portion and a turntable portion, the turntable portion arranged to support an optical disc secured thereto by way of the hub such that when a rotational motive force is applied to the hub/combination, the optical disc rotates about a hub/turntable axis of rotation, and a rotational motor adjacent to the hub/turntable arrangement, the rotational motor being arranged to provide the rotational motive force to the hub/turntable arrangement, the rotational motor being located in such a way that a rotational motor axis of rotation is translated in a direction perpendicular to the hub/turntable axis of rotation and wherein a Z height of the hub/turntable arrangement and a Z height of the rotational motor are not cumulative. | 10-20-2011 |
| 20110258650 | OPTICAL DISC DRIVE - From an optical disc drive, internal static electricity has to be discharged to the outside to prevent breakage of electric components such as laser diodes. A grounding spring has been used to discharge static electricity from a unit mechanism to the enclosure of the optical disc drive but it is necessary to improve the reliability of the drive in consideration of the dimensional accuracy and workability of the spring. Thus the free end of a grounding spring having a cantilever structure is shaped like an arc and an end of the grounding spring has a curved structure. This configuration improves the dimensional accuracy and workability of the spring, so that the performance of the optical disc drive can be more reliable. | 10-20-2011 |
| 20110258651 | LIGHTSCRIBE OPTICAL DISC DRIVE - An optical disc drive for marking a label side of a lightscribe disc is provided. The optical disc drive includes a spoke detecting device, a spindle motor PCB and an insulating pad. The spoke detecting device is used for detecting spoke patterns on the lightscribe disc. The spindle motor PCB is communicated with the spoke detecting device through a flexible cable. The insulating pad is coupled with the spindle motor PCB for supporting the spoke detecting device such that the spoke detecting device is separated from the lightscribe disc by a specified gap. | 10-20-2011 |
| 20110265106 | Motor and disk driving device equipped with motor - There are provided a motor and a disk driving device equipped with the motor. The motor may include a core on which a coil is wound, a rotor having a magnet generating an electromagnetic force through an interaction with the coil, and rotating a shaft, a sleeve housing including an inner diameter part to which a sleeve supporting the shaft is press-fitted, a core seating part extended outside in an outer diameter direction from the inner diameter part, and an outer diameter part extended to an axial lower side of the sleeve from the core seating part, and a base plate including a strength reinforcement part formed therein, the strength reinforcement part being brought into contact with the outer diameter part and at least one part of an inner surface of the core seating part. | 10-27-2011 |
| 20110265107 | DISK DEVICE - A disk device configured in such a manner that, in addition to tilt adjustment, the adjustment of the distance between a disk and an optical pickup can be easily performed. The disk device is provided with a stepping motor ( | 10-27-2011 |
| 20110271292 | CHUCKING DEVICE, MOTOR, DISK DRIVE APPARATUS AND CHUCKING DEVICE MANUFACTURING METHOD - In a chucking device, a rolling guide portion is arranged below an upper cover portion of a rotor holder and radially inwards of a cylinder portion of the rotor holder. This helps restrain the noises generated by the rolling movement of balls from propagating to the outside. Moreover, the turntable and the rolling guide portion are formed of a single resin member extending continuously through a through-hole defined in the rotor holder. | 11-03-2011 |
| 20110276989 | OPTICAL PICKUP DEVICE AND OPTICAL DISC DRIVE - Has an object of providing an optical pickup capable of realizing tracking control or focus control at a higher level of precision even when relative positions of a light source and a light detector are shifted due to a change in the environmental temperature, long-term deterioration or the like. The optical pickup includes a base member; a light source, fixed to the base member, for emitting a laser beam; an objective lens for collecting the laser beam onto an optical disc; a light detector, fixed to the base member, for detecting the laser beam reflected by the optical disc; fixing means for fixing the light source and/or the light detector to the base member; and a light blocking section for blocking a central portion of the laser beam in a circular shape on an optical path between the collimator lens and the light detector. | 11-10-2011 |
| 20110296447 | METHOD FOR INSPECTING OPTICAL INFORMATION RECORDING MEDIUM, INSPECTION APPARATUS, OPTICAL INFORMATION RECORDING MEDIUM AND RECORDING METHOD - A method for inspecting an optical information storage medium includes the steps of: irradiating the storage medium with a laser beam and rotating the medium by a constant linear velocity control technique by reference to the radial location at which the laser beam forms a spot on the medium; changing the rotational velocities according to the radial location on the medium between at least two linear velocities that include a first linear velocity Lv | 12-01-2011 |
| 20110307910 | Multi-Output Power Supply Device and Electric Apparatus Using Same - A multi-output power supply device ( | 12-15-2011 |
| 20120011522 | Motor and optical disc drive using the same - There is provided a motor and an optical disc drive using the same, more particularly, a motor having an improved coupling structure between a rotor and a stator, and an optical disc drive using the same. The motor includes: a shaft; a sleeve supporting the shaft so as to be rotatable; a stator coupled to an outer circumferential surface of the sleeve and extended outwardly in an outer diameter direction of the sleeve; and a base plate coupled to the outer circumferential surface of the sleeve under the stator and supporting the stator. | 01-12-2012 |
| 20120011523 | OPTICAL RECORDING MEDIUM, MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM, INFORMATION RECORDING/REPRODUCING METHOD AND INFORMATION RECORDING/REPRODUCING DEVICE - An optical recording medium (disk) capable of preventing a back focus at a face thereof and reducing the interference between beams reflected by each recording surface, thereby improving a quality of a servo signal and a reproductive signal. In a disk having (N−1) layers, if N is a natural number (more than three), and if a cover-layer thickness and intermediate-layer thicknesses are d1, d2, . . . dN, then a difference of 1 μm or above is set between the sum of di to dj and the sum of dk to dm for arbitrary natural numbers i, j, k, m (i≦j≦k≦m≦N). If refractive indexes are different from a standard value or different for each layer, then the thickness of each layer is converted based on a spread width of light according to the thickness. | 01-12-2012 |
| 20120011524 | OPTICAL RECORDING MEDIUM, AND OPTICAL INFORMATION DEVICE - An optical recording medium and an optical information device that improve the quality of a servo signal and a reproduction signal. In the optical recording medium, when shape-wise thicknesses tr | 01-12-2012 |
| 20120017225 | Motor and optical disc drive using the same - There are provided a motor in which a coupling structure between a sleeve holder and a base plate is improved to thereby reduce manufacturing costs and manufacturing process of the motor, and to an optical disc drive using the same. The motor may include a base plate including at least one protrusion supporting part formed therein; and a sleeve holder including a cylindrical shaped body part to which a sleeve is fastened in an inside of the sleeve holder, an extension part protruded such that an outer diameter is extended along an outer circumferential surface of the body part, and a flange part vertically protruded in an outer diameter direction from a lower end portion of the extension part so as to make surface contact with an upper surface of the base plate, wherein the sleeve holder is fastened to the base plate while an outer circumferential surface of the protrusion supporting part is brought into contact with an inner circumferential surface of the extension part. | 01-19-2012 |
| 20120017226 | Motor and optical disc drive using the same - There is provided a motor with an improved sleeve holder and base plate combining structure and an optical disc drive using the same. The motor according to the present invention includes a base plate having a plate shape; a sleeve holder including a cylindrical body part having a sleeve fastened thereinto and a flange part formed to be horizontally protruded in an outer-diameter direction from the lower end portion of the body part to surface-contact the upper surface of the base plate. | 01-19-2012 |
| 20120023513 | Motor and optical disc drive using the same - There is provided a motor having an improved coupling structure between a circuit board and a base plate, and an optical disc drive using the same. The motor includes: a base plate; and a circuit board coupled to a surface of the base plate and having insulating layers formed on both surfaces thereof, wherein the insulating layers formed on both surfaces of the circuit board have different thicknesses. In particular, an insulating layer formed on one surface of the circuit board attached to the base plate may be thicker than an insulating layer formed on the other surface thereof. | 01-26-2012 |
| 20120023514 | COMPOUND OBJECTIVE LENS, OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE - A compound objective lens, an optical head device, an optical information device, and an information processing device that can inhibit the occurrence of aberration even when a light beam source wavelength shifts from the designed value. A diffraction structure having a sawtooth or stepwise cross section is formed in the region (R | 01-26-2012 |
| 20120079511 | Motor, method for manufacturing the same, and optical disk drive using the same - There are provided a motor capable of preventing scratches from occurring on an outer surface of a rotor case thereof, a method for manufacturing the same, and an optical disk drive using the same. The motor includes a shaft rotatably inserted into a bearing assembly; and a rotor case fixedly fastened to the shaft and rotating together with the shaft, wherein the rotor case is provided with a chamfered part along the outer peripheral edge of the bottom surface thereof. The rotor case includes a rotor hub fastened to anone end of the shaft; an extending part extending in an outer-diameter direction from the rotor hub; and a vertical extending part formed to be vertically extended downwardly in a shaft direction from anthe outer peripheral edge of the extending part and having the chamfered part formed on the bottom end surface thereof. | 03-29-2012 |
| 20120110605 | Optical Disc Drive - An optical disc drive is provided to comprise a main circuit board; an optical pickup head, electrically connected to the main circuit board for reading data from an optical disc and for writing a label side of the optical disc; an spindle motor module, electrically connected to the main circuit board through a first flexible flat cable for supporting and rotating the optical; and a spoke detecting module, electrically connected to the main circuit board through a second flexible flat cable for detecting a spoke pattern formed on inner radius of the label side of the optical disc. | 05-03-2012 |
| 20120110606 | SPINDLE MOTOR - Disclosed is a spindle motor, the spindle motor including a turntable coupled to a rotating shaft and supporting the rotating shaft and a disc, a centering unit fitted over the rotating shaft and supporting an inner circumference of the disc, and a coil spring interposed between the turntable and the centering unit to elastically support the centering unit, wherein a first end of the coil spring is brought into contact with a spring hanging portion protruding from a side surface of the centering unit, and a second end opposite to the first end of the coil spring is supported by a spring support portion formed in the turntable. | 05-03-2012 |
| 20120117580 | OPTICAL PICKUP AND OPTICAL DISC DRIVE INCLUDING THE OPTICAL PICKUP - According to the present invention, a tracking error signal can be obtained with good stability by the three-beam differential push-pull method even if the track guide groove direction of the optical disc changes as viewed from the objective lens. | 05-10-2012 |
| 20120151507 | OPTICAL DISC DEVICE, AND METHOD OF SETTING OPERATION MODE OF OPTICAL DISC DEVICE - When power is supplied to an ODD used by being externally attached to a PC via a USB port, it is desirable not to cause an error to occur owing to occurrence of a power-on reset even when the power supplying ability of the PC is insufficient. After the ODD has been connected with the PC and started, the ODD executes an operation of large current consumption for a predetermined period of time and judges whether a power-on reset occurs or not while the operation is being executed. When the power-on reset does not occur, the ODD is set to operate on the basis of the highest specification. When the power-on reset has occurred, the specification is set lower so as to operate the ODD with reduced current consumption. | 06-14-2012 |
| 20120151508 | OPTICAL HEAD DEVICE, OPTICAL INFORMATION DEVICE, AND INFORMATION PROCESSING DEVICE - When information is recorded or reproduced on or from an optical information medium having three or more recording layers using blue light, interference by another layer light is reduced and, when information is reproduced from an optical information medium using red light, an S/N ratio is held excellently high. | 06-14-2012 |
| 20120185884 | DISK DEVICE - A disk device includes a disk rotation driving unit | 07-19-2012 |
| 20120198486 | MEDIA PROCESSING DEVICE AND CONTROL METHOD FOR A MEDIA PROCESSING DEVICE - A media processing device does not execute a media transportation process if the height of media stacked in a media storage unit is at an over capacity level, and reliably prevents problems such as damage to the media transportation mechanism caused by collision with the stacked media. If in the media processing device | 08-02-2012 |
| 20120204200 | OPTICAL PICKUP DEVICE AND MANUFACTURING METHOD FOR THE SAME - The invention provides an optical pickup device and a method of manufacturing the optical pickup device that allows an optical device to come to be held after one principal surface of a housing is covered with a covering plate. Most of the principal surface of the optical pickup device provided with the objective lens is covered with the cover. A hole is provided by partially removing the cover at a portion corresponding to the position where a light emitting device is to be disposed. In this manner, even after the housing is covered with the cover, the optical device can be touched through the hole. | 08-09-2012 |
| 20120240136 | OPTICAL PICKUP AND DRIVE APPARATUS - An optical pickup includes a lens holder; an objective lens provided on the lens holder and having an effective region for collecting light from a light source and an edge located outer to the effective region; and a lens protector provided on the lens holder. The lens protector protrudes toward an optical disc more than the objective lens. The edge of the objective lens includes a convexed portion protruding toward the optical disc. An apex of the effective region of the objective lens protrudes toward the optical disc more than the convexed portion of the edge. A straight line connecting a part of the edge of the objective lens and a part of the lens protector is closer to the optical disc than the apex of the effective region of the objective lens. | 09-20-2012 |
| 20120246666 | PRESSURE-SENSITIVE ADHESIVE SHEET FOR OPTICAL DATA RECORDING MEDIUM, OPTICAL DATA RECORDING MEDIUM, AND METHOD AND DEVICE FOR REPRODUCING DATA FROM OPTICAL DATA RECORDING MEDIUM - A pressure-sensitive adhesive sheet | 09-27-2012 |
| 20120254905 | SPINDLE MOTOR AND DISK DRIVE APPARATUS - A spindle motor includes a shaft, a cone, a turntable provide with a disk support portion, a cylindrical closed-top rotor holder, a rotor magnet, a stator, and a bearing mechanism. The cone includes a disk holding surface inclined radially outward and downward. The turntable further includes a resin-made table body having a disk support portion and an annular groove portion depressed upward at a lower side of the disk support portion, a plurality of balls rotatably arranged within the annular groove portion, an annular closure portion arranged between the table body and the rotor holder to close a lower opening of the annular groove portion, and a disc-shaped portion arranged radially inward of the annular groove portion of the table body, the disc-shaped portion having an upper surface bonded to the table body by an adhesive agent and a lower surface bonded to the rotor holder by the adhesive agent. | 10-04-2012 |
| 20130047173 | OPTICAL DISK DRIVE - An optical disk drive including a housing, a top cover, a spindle motor and a supporting element is provided. The housing has an accommodating space. The top cover covers the accommodating space. The spindle motor is disposed within the accommodating space and has a shaft. The supporting element is disposed between an end of the shaft and the top cover. When the top cover is deformed, the shaft props up the top cover through the supporting element. | 02-21-2013 |
| 20130332944 | Movement Mechanism and Optical Disc Apparatus - The present invention provides a movement mechanism that is capable of easily releasing a bite-in state of a feed screw and a rack without increasing the size or the cost of an apparatus and without breaking the movement mechanism. A movement mechanism according to the present invention linearly moves a movement object, and includes: a feed screw; a drive motor for rotating the feed screw; a drive section for supplying a drive pulse to the drive motor; a movement member for linearly moving the movement object along with the rotation of the feed screw by the drive motor, the movement member being engaged with the feed screw; a detection section for detecting a situation in which the movement object is not moving; and a control section for, when the detection section has detected a situation in which the movement object is not moving, causing the drive section to output a drive pulse that causes the drive motor to rotate and vibrate. | 12-12-2013 |
| 20140007145 | DATA STORAGE DEVICE TAPE PATH CLEANER | 01-02-2014 |
| 20140068642 | OPTICAL PICKUP AND OPTICAL DISC DEVICE - There is provided an optical pickup including a light source, an objective lens configured to focus light from the light source onto one signal face of an optical disc, the optical disc including two or more signal faces, each of the signal faces having a groove formed therein, a photodetector configured to receive returning rays from the optical disc, the photodetector having a light receiving face divided into four light receiving regions by a dividing line that is substantially parallel to a track direction of the optical disc and by a dividing line that is substantially perpendicular to the track direction, and a shading unit disposed at an incident side of the photodetector and configured to block, of returning rays from a signal face other than the one signal face of the optical disc, at least a diffracted ray that is diffracted by the groove. | 03-06-2014 |
| 20140109117 | OPTICAL PICKUP AND OPTICAL DISK DEVICE - The laser light source, the PBS, and the reference light mirror are arranged in such a manner as to simultaneously satisfy L | 04-17-2014 |
| 20140137138 | Thin Web Optical Media Guiding Method - An optical data storage device includes an optical storage tape having one or more optical storage layers. A plurality of optical pickup units reads and/or writes data to the optical storage tape. A feed reel provides the optical storage tape to the optical pickup units. A guiding wheel that guides the optical storage tape when the optical storage tape is in the vicinity of the optical pickup units during read and/or write operations. Finally, a take-up reel receives the optical storage tape from the guiding wheel. | 05-15-2014 |
| 20150143388 | Spindle Motor - A spindle motor is provided, the motor comprising: a base plate, a PCB on the base plate, a bearing assembly arranged on the base plate, a stator coupled to a periphery of the bearing assembly, a rotor rotationally coupled to the bearing assembly, the rotor including a yoke and a magnet, and a rotation shaft rotationally coupled to the bearing assembly. The base plate includes a planar portion and a protruding portion arranged along with a periphery of the yoke, the protruding portion being apart from the yoke. The base plate is partially covered with the PCB in a region where the stator is arranged. And, a height from the planar portion to an upper surface of the protruding portion is smaller than a height from the planar portion to a lower surface of the periphery of the yoke. | 05-21-2015 |
| 20160042757 | HOLOGRAM RECORDING AND PLAYBACK DEVICE AND HOLOGRAM PLAYBACK METHOD - A hologram recording and playback device is provided with: a medium rotation unit which rotates a hologram recording medium around a predetermined rotational axis; a movement unit which is capable of moving the position of the medium rotation unit within a plane that is perpendicular to the rotational axis; an orthogonal incident angle modification unit which is capable of modifying an orthogonal incident angle; a medium rotation control unit which controls the medium rotation unit so as to rotate the hologram recording medium; an eccentricity compensation unit which performs positioning control of the movement unit; an orthogonal incident angle control unit which controls the orthogonal incident angle modification unit; and an orthogonal incident angle calculation unit which calculates the orthogonal incident angle. | 02-11-2016 |
