Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 8161503 | 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 o... | 04/17/2012 |
| 8156512 | Optical disc drive having impact absorbing mechanism The present invention provides a thin optical disc drive whose impact resistance performance is improved. An under cover 19 is provided with a collision evasion hole 21 at a position corresponding to an end of an optical head housing 25. ... | 04/10/2012 |
| 8146115 | Optical disc drive with resilient member for reducing impact force to optical pick-up unit An optical disc drive for reducing impact forces in driving an optical pick-up unit is provided. The optical disc drive for driving an optical disc includes an optical pick-up unit, a guide bar, a rack, and a driving unit. The optical pick-up unit is configured for ... | 03/27/2012 |
| 8117630 | Optical disk player with head feeding mechanism An optical disk player includes a chassis, an optical pick-up head including a support member defining a guiding slot, and a guiding member molded integrally with the chassis, wherein the guiding member is received in the guiding slot and the optical pick-up head is... | 02/14/2012 |
| 7996859 | Optical disc device protecting the optical pickup unit during ejection by a catch member of a tray displacing a catch surface of the optical pickup unit An optical disc device comprising a tray (1) for carrying an optical disc, which tray (1) can move between a position inside the device and a position partly outside the device. The device also comprises a structure (13) for holding and driving ... | 08/09/2011 |
| 7882513 | Optical disc device and method for controlling optical disc device An optical disk device of the present application includes: a turntable 30 including plural induction grooves 31a to 31h as concave portions radially extending from vicinity of a center of the turntable 30 and having open po... | 02/01/2011 |
| 7873970 | Optical pickup device and optical disc drive apparatus The present invention provides an optical pickup device employing a disc protector that includes a plurality of first protrusions and at least one second protrusion disposed on the lens holder, wherein the first protrusions are formed by applying a first adhesive to... | 01/18/2011 |
| 7853966 | Optical recording and/or reproducing apparatus with protection shield According to another aspect, an optical recording and/or reproducing apparatus includes a frame, a spindle motor, a pair of parallel guide rails, an optical pickup head, and a shield mounted on the guide rails. The shield extends a protection surface higher than a l... | 12/14/2010 |
| 7739703 | 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... | 06/15/2010 |
| 7640559 | Objective lens actuator An objective lens actuator is provided which includes two objective lenses mounted on a movable body, and which is capable of preventing the movable body from coming into contact or collision with a disk and whose thickness becomes thinner. When a light beam is conc... | 12/29/2009 |
| 7631321 | Lens protector and optical pick-up The lens protector serving as a means for preventing a scratch of an objective lens and an optical disc of the optical pick-up in which a signal-recording surface of the optical disc is irradiated with light beams to read signals from the signal-recording layer and/... | 12/08/2009 |
| 7559069 | Optical disc device A tray unit is slidably attached to a frame. The tray unit comprises a disc tray which slides with respect to the frame, and a pickup unit supported by a damper to the disc tray. The pickup unit includes a shutter for closing an opening through which an optical pick... | 07/07/2009 |
| 7526781 | Optical disk apparatus with objective lens protective unit The present invention provides an optical disk apparatus which has a cover to cover and uncover an objective lens provided in an optical pickup, thus preventing the objective lens from being contaminated with dust, etc. The optical disk apparatus includes an optical... | 04/28/2009 |
| 7444652 | Protective device A protective device (1) for protecting an optical head (2) of a disc drive unit against dirt and dust and shock when the disc drive unit is not in use comprises a carrier disc (5) similar to a music CD disc for engaging in the disc receiving are... | 10/28/2008 |
| 7411793 | Optical disk device An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the semiconductor element. The drawer is formed of a material having good thermal... | 08/12/2008 |
| 7350220 | Disk drive unit A disk drive unit advantageously prevents dust from adhering to a pickup. The disk drive unit has a housing and a tray. The tray reciprocates between a retracted position and a projected position. A first pickup and a second pickup have a spindle motor located there... | 03/25/2008 |
| 7324411 | Thin-film coil, coil driving circuit and magnetic head A thin-film coil include a substrate and first and second spiral coils of bifilar winding. Each of the first and the second coils includes an outer circumferential end and an inner circumferential end. The outer circumferential ends of the first and the second spira... | 01/29/2008 |
| 7315452 | Optical disk device An optical disk device of the present invention has a main PC board carrying a semiconductor element and attached at the rear of a drawer to efficiently dissipate a heat generated from the semiconductor element. The drawer is formed of a material having good thermal... | 01/01/2008 |
| 7296281 | Eddy attenuating apparatus for an optical pickup assembly and disc drive adopting the same An optical pickup assembly having: a pickup base; an actuator installed in the pickup base, and having a blade, on which an objective lens to radiate light onto a disc is mounted; a cover, installed to surround the actuator, and regulating a range of movement of the... | 11/13/2007 |
| 7249361 | Optical pickup device Light from a light source is led to a condensing lens by a light leading unit and is condensed onto an optical recording medium by the condensing lens. Light reflected from the optical recording medium is led to a light sensing device through a spot adjustment lens ... | 07/24/2007 |
| 7246364 | Optical pickup device Light from a light source is led to a condensing lens by a light leading unit and is condensed onto an optical recording medium by the condensing lens. Light reflected from the optical recording medium is led to a light sensing device through a spot adjustment lens ... | 07/17/2007 |
| 7213251 | Guide shaft tilt adjusting apparatus for optical disc player A tilt adjusting apparatus for an optical disc player to adjust a tilt of an optical pickup having adjusting ends positioned on at least first ends of two guide shafts that guide reciprocating motion of the optical pickup, elastic members positioned below the adjust... | 05/01/2007 |
| 7210151 | Heat dissipation member for an optical disk drive The present invention provides a heat dissipation member for use in the optical disk drive. The present invention includes an outer frame and a chassis. The chassis has a drive module, a pickup module and two guide rods. A heat dissipation member is disposed on the ... | 04/24/2007 |
| 7197755 | Lens cleaner and lens cleaning method for optical disc device By not recording a signal which can be the subject of focussing on a disc, a simple and inexpensive lens cleaner is provided which is able to perform cleaning of an object lens in a simple and reliable manner, without causing the disc to rotate, even in a standard d... | 03/27/2007 |
| 7185348 | Optical disk drive An optical disk device. The optical disk device includes a main guide rod, a sub guide rod, a pickup head, and a protrusion. The main guide rod and the sub guide rod are parallel. The pickup head has a clamp to grasp the sub guide rod. The protrusion is disposed on ... | 02/27/2007 |
| 7136331 | Disk drive An optical pick-up includes a lens holder and a lens holder supporting portion. The lens holder has a focusing coil, a tracking coil, and a pair of nickel plates arranged to sandwich the focusing coil from the top and the bottom. The lens holder supporting portion i... | 11/14/2006 |
| 7127729 | Magneto-optical head and magneto-optical disk drive A magneto-optical head including a lens forming a light spot on a storage disk, a magnetic field generating coil arranged between the lens and the disk to surround the optical center of the lens, and an annular heat sink arranged around the coil. The distance betwee... | 10/24/2006 |
| 7124420 | Pickup device having a heat-radiation path A communication hole (55) is provided in a pickup base (51). A laser light source (61) is provided at an end of the communication hole (55). A grating (71) is provided at another end of the communication hole (55). The commu... | 10/17/2006 |
| 7111311 | Optical pickup device A shock absorber includes a projection that projects toward an optical disk and projects out of a surface of an objective lens facing the optical disk to prevent collision of the objective lens and the optical disk. The shock absorber has a surface resistivity of no... | 09/19/2006 |
| 7103895 | Optical pickup device, and recorder and/or player An optical pickup device includes a feed screw to move an optical pickup having an objective lens radially on an optical disc, a sliding member provided for slidable movement in relation to the optical pickup, and connected to the optical pickup by a coil spring tha... | 09/05/2006 |
| 7047541 | Impact cushion mechanism for pick up head A impact cushion mechanism for pick up head is installed in an optical disc drive, wherein the optical disc drive is equipped with a pick up head spanning two guide bars whereas one side of the pick up head can move back and forth along the two guide bars. The impac... | 05/16/2006 |
| 7006418 | Optical disk device that monitors chip temperature of a drive and controls its operation based on the chip temperature Monitor circuits monitor junction temperatures of chips of driver ICs which drive a driving part of a recording/reproduction system. Comparison circuits compare the junction temperatures with respective arbitrarily set temperatures to output temperature flags as com... | 02/28/2006 |
| 7007288 | Recording and/or reproducing apparatus for optical recording media A protective cover for an objective of an optical head is proposed which can be moved between a position covering the objective and a position exposing the objective. In the position exposing the objective, the protective cover is positioned outside the plane betwee... | 02/28/2006 |
| 6928649 | Method of attaching a sensor to a pickup head and pickup head A soft adhesive agent whose force occurring at the time of curing is small is applied between a rib and a PD, and after the curing of the soft adhesive agent, a hard adhesive agent whose force occurring at the time of curing is large is applied between the rib and a... | 08/09/2005 |
| 6871351 | Disc driving apparatus In a disc driving apparatus, wherein a laser diode and a laser driver circuit board are mounted on a pickup housing in thermal contact therewith and are disposed adjacent to each other, a heat separation member is provided between the laser diode and the laser drive... | 03/22/2005 |
| 6857125 | Contact member to optical disk, protecting film for optical disk and coating composition A coating comprising a urethane resin as a base, and at least polyurethane particles and fluororesin powder is formed on a surface of a member that is, or can be, contacted with an optical disk in an optical disk apparatus. The coating can prevent the optical disk, ... | 02/15/2005 |
| 6661767 | Tone arm assembly with interchangeable tone arm tube A tone arm assembly with an interchangeable tone arm tubes includes a fixed base. A support bracket is connected to the fixed base and rotatable thereon. A tone arm housing is mounted in the support bracket and rotatable therein. A separate straight tone ... | 12/09/2003 |
| 5258971 | Optical disc drive with interconnecting hoods An optical disc drive device includes an optical unit (10) and a movable pickup (11). The optical unit is fixedly provided on a chassis and has a light source for radiating a light beam towards an optical disc (13) and a light receiving section for receiv... | 11/02/1993 |
| 5243591 | Protecting a read/write head from damage A disk storage device, such as a magnetic disk storage device, for reading data from and writing data to a magnetic data storage disk includes a spindle onto a base for rotating the magnetic storage disk and a read/write head for reading data from and wri... | 09/07/1993 |
| 4358801 | Disk unit with rotatable circular information disk A disk unit (1) comprises a circular information disk (2) accommodated in an enclosure, at least one major wall (6) of the enclosure being formed with a slot (11) for an information write and/or read head of a disk drive apparatus, which slot is closed by... | 11/09/1982 |
