Patent application number | Description | Published |
20080253239 | OPTICAL PICKUP AND METHOD FOR MANUFACTURING THE SAME - To increase the speed of operations and improve vibration properties by rotating holders to wind coils in objective lens driving means of an optical pickup. In an optical pickup wherein a tracking coil and two focusing coils are wound on the same surface of a coil holder, the coil holder includes a tracking coil holder and two focusing coil holders, and each of the tracking coil holder and two focusing coil holders has a hole passing through the center of each coil. | 10-16-2008 |
20090103421 | Object Lens Actuator, Optical Pickup and Optical Disk Drive - The present invention provides an object lens actuator, an optical pickup, and an optical disk drive, which can increase the size of the object lens actuator driving a lens holder in the tangential tilt direction, and drive and control the lens holder with a small amount of drive current. | 04-23-2009 |
20090116129 | Objective Lens Actuator and a Disc Apparatus Using the Same Therein - An objective lens actuator, having a small tilt of an objective lens, for driving the objective lens in a focusing direction and a tracking direction, so as to focus lights on a recording surface of an optical disc, as a recording medium of information, comprises therein: a magnet; a lens holder, which is configured to hold the lens thereon; and four (4) pieces of tracking coils are disposed in a line on a side surface of the lens holder for holding the objective lens thereon, facing to the magnet. And also, an objective lens actuator, having a small tilt of an objective lens, for driving an objective lens in a focusing direction and a tracking direction, so as to focus lights on a recording surface of an optical disc, as a recording medium of information, comprises therein: magnets, which are disposed on two (2) surfaces putting the objective lens therebetween; a lens holder, which is configured to hold the lens thereon; and four (4) pieces of tracking coils are disposed in a line on each of two (2) side surfaces of the lens holder for holding the objective lens thereon, facing to the magnets. | 05-07-2009 |
20090116345 | Objective Lens Actuator - An objective lens actuator in an optical pickup, having a semiconductor laser diode, electro-optic parts, such as a lens or the like, as well as, the objective lens actuator, etc., in a case, comprises: a holder, which mounts an objective lens and a coil thereon, as being a movable part; a magnetic circuit part, which is made up with a magnet for magnetically driving said holder and a yoke; a plural number of elastic support parts which elastically supports said holder; and a support part, which supports other ends of said elastic support parts, wherein said support part has a part, which is cut open in parallel with the elastic support parts, between said elastic support parts, and has a through hole, in which said elastic support part passes through for each of said elastic support parts, and thereby to provide the objective lens actuator for lowering the unwanted vibration mode of the objective lens, and also enabling a stable control thereof. | 05-07-2009 |
20090244780 | Magnetic Recording Medium and Recording/Reproducing Apparatus Therefor - A magnetic recording medium on which a plurality of concentric recording tracks is formed, the recording tracks including a plurality of closed shaped magnetic parts formed to be symmetrical with respect to two orthogonal axes in shape, the magnetic recording medium being rotated by a recording and reproducing apparatus provided with a slider including a recording and reproducing head to record or reproduce a magnetic recording, wherein when the recording and reproducing head which is moved with movement of a slider to record data on or reproduce data from the recording tracks is inclined by a predetermined angle with respect to a tangent line of concentric circles of the recording tracks, the slider moving in a radial direction of the concentric circles of the recording tracks, one of the two orthogonal axes of the magnetic parts is perpendicular to the recording and reproducing head. | 10-01-2009 |
20100067333 | OBJECTIVE LENS ACTUATOR AND AN OPTICAL PICKUP - An objective lens actuator, being suitable for a thin-sized optical pickup and a thin-sized optical disc apparatus, comprises: an objective lens for focusing a light upon a recording surface of an optical disc; and a driving means including a focusing coil, tracking coils, and a magnetic circuit, for operating the objective lens into a focusing direction of approaching/receding to/from the optical disc, and into a tracking direction of a radius of the optical disc, wherein the magnetic circuit has two (2) pieces of magnets putting the objective lens therebetween, and one of the magnets is short of length in the focusing direction and is long in length in the tracking direction, comparing to the other magnet, thereby brining an unnecessary moment, which is applied upon a moving part including the objective lens therein, to be small, and suppressing inclination or tile and vibration of the objective lens, so as to deal with high-density and high-speed recording/reproducing of information. | 03-18-2010 |
20100067352 | OBJECTIVE LENS ACTUATOR AND AN OPTICAL PICKUP - An objective lens actuator comprises, two objective lenses, each for focusing lights upon an optical disc, an objective lens holder member for holding the objective lenses thereon, and lens protectors for preventing the objective lenses from being contacted on the optical disc, wherein the lens protectors include first and second lens protectors, which are provided on both end portions of the objective lens holder member in a tracking direction, and a third lens protector, which is provided in a middle of the two objective lenses, wherein the first and second lens protectors, which are provided on both end portions of the objective lens holder member in the tracking direction, are provided the objective lenses and end portion of the objective lens holder member in the tracking direction, and the third lens protector, which is provided between the objective lenses, has a height closer to that of the optical disc than the protectors, which are provided on both end portions of the objective lens holder member in the tracking direction. | 03-18-2010 |
20100067353 | OBJECTIVE LENS ACTUATOR AND A DISC APPARATUS APPLYING THE SAME THEREIN - An objective lens actuator comprises a lens holder for attaching an objective lens thereon, a piece of focusing coil, being wound along side surface of the lens holder around the objective lens, and three magnets, being disposed opposing to two surfaces each having a normal line perpendicular to both a focusing direction and a tracking direction, among four side surfaces of the lens holder, wherein the three magnets are aligned, continuously, along the tracking direction, differing a polarity thereof from one another, and width of the magnets on both outsides is wider than width of the magnet inside, or alternately, one magnet, being disposed opposing to two surfaces each having a normal line perpendicular to both a focusing direction and a tracking direction, among four side surfaces of the lens holder, wherein the magnet is magnetized into three poles along the tracking direction, and among the three poles, width of the poles on both outsides is wider than width of the pole inside. | 03-18-2010 |
20100067354 | OPTICAL PICKUP AND AN OPTICAL DISC APPARATUS MOUNTING THE SAME THEREON - An optical pickup, mounting a lens actuator | 03-18-2010 |
20100149954 | OBJECTIVE LENS ACTUATOR, OPTICAL PICKUP AND OPTICAL DISC DRIVE - An objective lens actuator | 06-17-2010 |
20100302928 | OBJECTIVE LENS ACTUATOR AND DISC DRIVE EMPLOYING THE OBJECTIVE LENS ACTUATOR - An object lens actuator can improve workability and operate with high reliability by prevention of damage to the object lens actuator and a disc and sticking of a moving part caused by an excessive movement of the moving part. In a disc drive employing the object lens actuation, stable writing/reading operation is implemented by always keeping a focal point of an object lens at a predetermined track of a recording surface of the disc even when being under the action of external perturbations such as a vertical deviation or a radial deviation of the disc, resulting in improved reliability. A solder-flux adhesion prevention gadget is provided between a substrate and a stopper receiving face, which may include a stepped stage, a partition protruding from the surface of the lens holder, or alternatively a combination of them arranged in order in the range. | 12-02-2010 |
20110149713 | OBJECTIVE LENS DRIVE DEVICE AND OPTICAL PICKUP - In an optical pickup equipped with a semiconductor laser, electro-optical components such as a lens, and an objective lens drive device, the objective lens drive device includes objective lenses, a holder holding the objective lenses, a focusing coil, and tracking coils. The focusing coil is wound in parallel to the optical surface of the objective lens, and formed in a parallelogram shape having inclined portions provided near the tracking coils. The two tracking coils are placed on diagonal portions of the lens holder. | 06-23-2011 |
20110185375 | OBJECTIVE LENS DRIVING APPARATUS, OPTICAL PICKUP - High-performance and reliable objective lens driving apparatus and optical pickup wherein the tilt of an objective lens relative to an optical disc is suppressed are provided. The optical pickup is equipped with a semiconductor laser, an electro-optic component, and the objective lens driving apparatus. In this optical pickup, the objective lens driving apparatus is comprised of: a moving part including an objective lens, a holder that holds the objective lens, a focusing coil, and a tracking coil; a holding member for elastic support members that couples together multiple elastic support members providing elastic support on a fixed part and the moving part and is mounted on the moving part; the elastic support members that elastically support the moving part from the fixed part; and the fixed part. The holding member for elastic support members mounted on the moving part and the holder that holds the objective lens are joined together by fitting together a concavity and a convexity. | 07-28-2011 |
20110247021 | OPTICAL PICKUP - In an optical pickup for use in an optical disc device, wire rods are wound directly around a lens-coil holder to make tracking coils and focus coils. The lens-coil holder is divided into three holders, one of which holds an optical lens thereon and has on its sides wire-winding protrusions for wiring wire rods therearound to make tracking coils. The remaining holders have focus coils that are wound therearound. Alternatively, the lens-coil holder is divided into two holders, one of which has on its sides wire-winding protrusions for wiring wire rods therearound to make tracking coils. The remaining holder holds an optical lens thereon and has focus coils that are wound therearound. The lens-coil holder has a cavity for letting pass through a laser beam emitted in parallel to an optical disc surface. | 10-06-2011 |
20120127845 | OPTICAL PICKUP - An optical pickup includes an objective lens, a lens holder which holds the objective lens, a focusing coil attached to the lens holder having the winding axis directed at the optical axis of the objective lens, and a magnet provided opposite the side surface of the lens holder. A protruding portion is attached to the side surface of the lens holder at a side apart from the objective lens with respect to the optical axis direction of the objective lens farther than the focusing coil. | 05-24-2012 |
20120297403 | OPTICAL PICKUP - An optical pickup whose thickness is small and power consumption is low is provided, in which these advantages are achieved by increasing the driving force generated in the tilt coil in an objective lens driving apparatus and by making the thickness of the objective lens driving apparatus to be small. | 11-22-2012 |
20120314313 | OBJECT LENS DRIVE UNIT AND OPTICAL PICKUP USING THE SAME - In the object lens drive unit including a lens holder with an object lens attached to, a plurality of driving coils attached to the lens holder, connection substrates attached to both sides of the lens holder, and a plurality of suspension wires with end parts thereof connected to the connection substrates for operatively supporting the lens holder, a plurality of sets of wire connection electrodes for connecting the suspension wires and coil connection electrodes electrically connected to the wire connection electrodes for connecting terminal wires of the coils are arranged in line in an optic axis direction of the object lens and the wire connection electrodes and the coil connection electrodes are formed in a symmetric shape to a central axis parallel to the optic axis direction on the connection substrates. | 12-13-2012 |
20130086600 | OPTICAL PICKUP - An optical pickup includes an object lens; a moving part including the object lens and coils; rod-shaped support members disposed in a focusing direction, one end of each of the support members being attached to side surfaces of the moving part in a tracking direction; a fixing part for fixing the other end of each of the support members; a yoke including magnets; and gel holding parts, each of the gel holding parts including walls on both sides of the support members in the tracking direction, and the support members being disposed on both sides of the moving part in the tracking direction. Each of the gel holding parts includes an opening at one end on an optical disc side in the focusing direction and includes a cutout in the wall farther from the object lens in the tracking direction, the cutout extending from an edge of the opening. | 04-04-2013 |
20140089952 | OPTICAL PICKUP - An optical pickup includes an objective lens which converges light on an optical disc, a lens holder to which the objective lens is attached, a focusing coil and a tracking coil wound around the lens holder, magnets arranged to face two side faces of the lens holder parallel to a radial direction of the optical disc, supporting members which support the lens holder, and supporting member fixation parts provided on two side faces of the lens holder orthogonal to the radial direction of the optical disc. The focusing coil is wound on parts of the lens holder on both sides of the lens holder in regard to the radial direction of the optical disc so that each portion of the focusing coil on each side is wound around a winding central axis extending in a direction parallel to the optical axis of the objective lens. | 03-27-2014 |