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| 20090168616 | SPHERICAL ABERRATION COMPENSATION METHOD OF OPTICAL STORAGE DEVICE - A spherical aberration compensation method of an optical storage device is provided. The method includes: deriving a first spherical aberration compensation value corresponding to a first track position on a recording layer of an optical storage medium to serve as a first reference value; deriving a second spherical aberration compensation value corresponding to a second track position on the recording layer of the optical storage medium to serve as a second reference value; and estimating a third spherical aberration compensation value corresponding to a third track position on the recording layer of the optical storage medium according to the first and second reference values. | 07-02-2009 |
| 20090279410 | METHOD AND APPARATUS FOR CONTROLLING SPHERICAL ABERRATION CORRECTION FOR AN OPTICAL DISK DRIVE - The invention provides a method for controlling spherical aberration correction for an optical disk drive. First, a collimator lens is moved to a first target position for spherical aberration correction. A driving time of motion of the collimator lens is then calculated. A prohibiting time is then determined according to the driving time. The collimator lens is then prevented from moving until the prohibiting time elapses. | 11-12-2009 |
| 20100034061 | OPTICAL STORAGE APPARATUS AND CONTROL CHIP FOR ACCESSING AN OPTICAL DISC AND METHOD THEREOF - An optical storage apparatus includes an optical pickup head, a drive module, a spherical aberration compensator, and a controller module. The drive module is coupled to the optical pickup head for performing a predetermined operation associated with the optical pickup head. The spherical aberration compensator is coupled to the optical pickup head for performing a spherical aberration compensation upon the optical pickup head. The controller module is coupled to the drive module and the spherical aberration compensator for controlling the drive module to perform the predetermined operation during a first period of time and the spherical aberration compensator to perform the spherical aberration compensation during a second period of time. The first period of time overlaps the second period of time. | 02-11-2010 |
| 20100310020 | DATA RECOVERY SYSTEM AND METHOD THEREOF - A data recovery system and method is disclosed. Said data recovery system comprises a maximum-likelihood detector, a non-maximum likelihood detector, signal-length calculator, a determining unit and a selecting unit. The maximum-likelihood detector transforms a digital signal into a first binary signal. The non-maximum likelihood detector transforms the digital signal into a second binary signal. The signal-length calculator calculates a length of the first binary signal and a length of one previous to the first binary signal. The determining unit generates a selecting signal when the length of the first binary signal and the length of one previous to the first binary signal meet a criterion. The selecting unit coupled to the maximum-likelihood detector and the non-maximum likelihood detector, selectively outputs the first binary signal or the second binary signal based on the selecting signal. | 12-09-2010 |
| 20110080813 | METHODS FOR OVERWITE CYCLE IMPROVEMENT OF OPTICAL STORAGE MEDIUM AND RELATED MACHINE READABLE MEDIA - A method of recording data onto an optical storage medium includes: before starting recording data onto the optical storage medium from an expected link point on the optical storage medium, setting a current recording condition corresponding to the expected link point according to at least one previous recording condition corresponding to the expected link point; and controlling an operation of recording the data onto the optical storage medium according to the current recording condition. | 04-07-2011 |
| 20110188364 | OPTICAL DISC DRIVE AND TRACKING METHOD THEREOF - An optical disc drive and tracking method thereof are disclosed. The optical disc drive includes an optical pickup head, a slip compensation module, a tracking control module and a tracking drive. The optical pickup head generates a detected signal according to an optical signal from an optical disc. The slip compensation module generates a slip compensation signal according to the detected signal. The tracking control module generates a tracking out signal according to the detected signal and the slip compensation signal and, according to the tracking out signal, the tracking drive drives the optical pickup head. | 08-04-2011 |
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| 20090109806 | TE SIGNAL POLARITY DETERMINING SYSTEM AND RELATED METHOD THEREOF - A TE signal polarity determining method, includes: (a) obtaining a wobble related signal, an RF related signal, a TE signal and an accessing direction; and (b) determining if an original polarity of a TE signal should be changed or not according to phases of the RF related signal, the wobble related signal and/or the accessing direction. | 04-30-2009 |
| 20090109807 | TE SIGNAL POLARITY DETERMINING SYSTEM AND RELATED METHOD THEREOF - Disclosed is a TE signal polarity determining method, which includes: (a) obtaining a detection signal from an optical disc; (b) obtaining characteristics of the detection signal corresponding to different polarities of the TE signal; and (c) determining whether an original polarity of the TE signal should be changed or not according to the obtained characteristics. | 04-30-2009 |
| 20090141598 | Apparatus for Adjusting Focus Offset and Method Thereof - The present invention provides an apparatus of an optical disc drive for adjusting a focus error signal. The apparatus includes a focus offset determining unit and an adjusting module. The focus offset determining unit is utilized for determining a target focus offset corresponding to a target condition, and the adjusting module is coupled to the focus offset determining unit and utilized for receiving the focus error signal and adjusting the focus error signal with the target focus offset to generate an adjusted focus error signal. | 06-04-2009 |
| 20100272139 | DRIVING CIRCUIT FOR DRIVING LASER DIODE AND METHOD FOR CONTROLLING LASER POWERS OF LASER DIODE - The invention provides a driving circuit for driving a laser diode of a pickup head. In one embodiment, the driving circuit comprises an automatic power control (APC) module, a clamp value determination unit, and a clamp circuit. The automatic power control module generates at least one power control signal. The clamp value determination unit dynamically determines at least one clamp value corresponding to the power control signal when the pickup head accesses an optical storage medium. The clamp circuit clamps the power control signal according to the clamp value to obtain a clamped power control signal. A driving signal for driving the laser diode can then be generated according to at least the clamped power control signal. | 10-28-2010 |
| 20110158065 | Optical Disk Drive and Method for Performing Layer Jumps - The invention provides a method for performing a layer jump of a disk. First, a tracking error generation method is determined according to a layer type of a target layer when the layer jump is performed. A tracking error signal is then generated according to the tracking error generation method. | 06-30-2011 |
| 20110158070 | Optical Disk Drive and Method for Determining Type of a Blu-Ray Disk - The invention provides a method for determining the layer type of a blu-ray disk. First, a laser beam is focused on a target layer of the blu-ray disk. Reflection of the laser beam from the target layer is the detected to obtain a reflection signal. The reflection signal is then processed to generate a first tracking error signal and a second tracking error signal. Magnitudes of the first tracking error signal and the second tracking error signal are then measured. The magnitude of the second tracking error signal is then subtracted from the magnitude of the first tracking error signal to obtain a difference value. Finally, the layer type of the target layer is determined by comparing the difference value with the first predetermined threshold. | 06-30-2011 |
| 20110182158 | TE SIGNAL POLARITY DETERMINING SYSTEM AND RELATED METHOD THEREOF - A tracking error (TE) signal polarity determining method, comprising: (a) obtaining a wobble related signal and a TE signal from an optical pick-up unit accessing an optical disc; (b) determining an accessing direction; and (c) determining if an original polarity of the TE signal from the optical disc should be changed or not according to the relation between the wobble related signal and the accessing direction. | 07-28-2011 |
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| 20090022035 | SPHERICAL ABERRATION CORRECTION CONTROL - A controller and a control method is provided to control a spherical aberration correcting device provided in an optical pick-up head to change a spherical aberration compensate value according to different controlling states during the spherical aberration correcting device changes the spherical aberration compensate value. For the mechanical type spherical aberration correcting device, the controlling states are the different speeds for the actuators to drive the lenses. For the liquid crystal type spherical aberration correcting device, the controlling states are the control values for the driver to drive liquid crystal spherical aberration corrector. | 01-22-2009 |
| 20090180362 | Method and Apparatus for Deciding Spherical Aberration Compensation Value - A method and an apparatus for deciding a spherical aberration compensation (SAC) value for an optical storage medium are provided. The optical storage medium comprises at least one recording layer and a cover layer. The SAC value is suitable for a selected one of the at least one recording layer. First, a focus search on the optical storage medium is performed to derive a focus error (FE) signal in response to a testing SAC value. Then, a center level and a center basis corresponding to the testing SAC value according to the FE signal is determined. The SAC value according to the center level, the center basis, and the testing SAC value is also determined. When the center level and the center basis are equal, the SAC value is determined to be the testing SAC value. | 07-16-2009 |
| 20100157783 | LAND/GROOVE TRACK AND PICKUP HEAD MOVEMENT DIRECTION DETECTION - A detector is scanned across an optical storage medium having groove tracks and land tracks, each track having a wobble structure, to detect light reflected from the optical storage medium. A wobble signal and a tracking error signal are generated based on an output of the detector, and the wobble signal is sampled according to the tracking error signal. A determination about whether the detector is at the groove track or the land track is made based on the tracking error signal and a comparison of sampled values of the wobble signal. | 06-24-2010 |
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| 20090277233 | REKEYABLE LOCK CYLINDER AND OPERATING METHOD THEREOF - A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of assembled pins and a position block. The plug body has a longitudinal axis, a transverse axis vertical to the longitudinal axis, a keyhole and a first through hole. Each of the assembled pins is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The position block disposed at the plug body has a plurality of pin runners used for disposing the first rack components, a second through hole corresponding to the first through hole and a tool-contacting surface located within the second through hole. The position block can move along the transverse axis-direction of the plug body to make each of the first rack components reengage with each of the second rack components. | 11-12-2009 |
| 20090277236 | QUICKLY REKEYABLE LOCK CYLINDER AND PLUG ASSEMBLY THEREOF - A quickly rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a position block disposed at the plug body, a first rack group and a second rack group. The plug body has a longitudinal axis, a transverse axis vertical to the longitudinal axis and a rekeying tool opening. The first rack group has a plurality of first rack components. The second rack group may push the position block to move and has a plurality of second rack components in engagement with the first rack components and at least one tool-receiving portion pushed by the rekeying tool. The second rack components can move along transverse axis of the plug body to release engagement with the first rack components. | 11-12-2009 |
| 20100018267 | REKEYABLE LOCK CYLINDER, PLUG ASSEMBLY OF THE SAME AND METHOD FOR REKEYING THE SAME - A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of pin assemblies and a guide bar. The plug body has a longitudinal axis, a transverse axis perpendicular to the longitudinal axis and a tool-receiving hole. Each of the pin assemblies is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The guide bar is coupled to the plug body and has a plurality of pin runners for engaging with the first rack components and a tool-receiving portion exposed by the tool-receiving hole. The guide bar is capable of moving along transverse axis-direction of the plug body to disengage the first rack components from the second rack components. | 01-28-2010 |
| 20100101289 | Rekeyable lock cylinder and rekeying method thereof - A rekeyable lock cylinder comprises a cylinder body, a plug, an adjusting block and a plurality of rack component assemblies. The plug disposed within the cylinder body has a trench and a plurality of rack component runners communicating with the trench. The adjusting block disposed at the trench has an arc sidewall, a plurality of leading slots corresponding to the rack component runners one by one and a position groove recessed from the arc sidewall. The position groove has a notch portion and a groove inner portion, wherein a depth of the groove inner portion is larger than a depth of the notch portion. Each of the rack component assemblies comprises a first rack component disposed at the rack component runner and a second rack component capable of engaging with the first rack component. Each of the first rack components has a rib portion located at the leading slot. | 04-29-2010 |
| 20110154871 | LOCK CYLINDER STRUCTURE - A lock cylinder structure comprises a cylinder body, a plug disposed within the cylinder body, a pin assembly and a key positioning assembly. The cylinder body has a plurality of upper pin holes and an accommodating hole. The plug has an outside wall, a keyhole, a plurality of lower pin holes and a through hole in communication with the outside wall and the keyhole. The pin assembly comprises a plurality of upper pins disposed within the upper pin holes and a plurality of lower pins disposed within the lower pin holes. The key positioning assembly comprises a first movable member disposed at the accommodating hole of the cylinder body and a second movable member disposed at the through hole of the plug. The second movable member contacts against the first movable member and has a push-receiving surface. | 06-30-2011 |
| 20110154872 | REKEYABLE LOCK CYLINDER - A rekeyable lock cylinder comprises a cylinder body, a plug assembly disposed within the cylinder body and an operation error preventing unit. The cylinder body has a plurality of upper pin holes and an accommodating hole. The plug assembly comprises a plug body, a plurality of assembled rack components and a position block disposed within the plug body. The plug body has an outside wall, a keyhole, a plurality of lower pin holes and a first hole in communication with the outside wall and the keyhole. The assembled rack components are disposed at each of the lower pin holes of the plug body respectively. The operation error preventing unit comprises a first movable member disposed at the accommodating hole of the cylinder body and a second movable member disposed at the first hole of the plug body, and the first movable member may contact against the second movable member. | 06-30-2011 |
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| 20090277234 | REKEYABLE LOCK CYLINDER AND METHOD FOR REKEYING THE SAME - A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of assembled pins, a position block and a rotating member. The plug body has a longitudinal axis, a transverse axis perpendicular to the longitudinal axis and a first through hole. Each of the assembled pins is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The position block is disposed at the plug body and has a plurality of pin runners for disposing the first rack components and a second through hole corresponding to the first through hole. The rotating member is installed penetrating the first through hole and the second through hole and has a contacting portion located within the second through hole, wherein the position block is capable of being pushed by the contacting portion and moved along the transverse axis-direction of the plug body for disengaging the first rack components from the second rack components. | 11-12-2009 |
| 20090277235 | Lock cylinder assembly - A lock cylinder assembly comprises at least a cylinder body, a plug, a position block and a resilient member. The cylinder body has a hollow cylinder portion and the hollow cylinder portion has an inside wall and an axial groove recessed from the inside wall. The plug disposed within the hollow cylinder portion of the cylinder body has a front portion, a middle portion, a drive portion and a keyhole formed at the front portion and the middle portion. The position block is disposed at the keyhole of the plug adjacent to the drive portion and has a protrusion protruding from the plug. The protrusion is movably disposed within the axial groove of the hollow cylinder portion. The resilient member is disposed between the drive portion of the plug and the position block and one end of the resilient member contacts against the position block. | 11-12-2009 |
| 20090277240 | Rekeyable lock cylinder, plug assembly of the same and method for rekeying the same - A rekeyable lock cylinder comprises a cylinder body and a plug assembly disposed within the cylinder body. The plug assembly comprises a plug body, a plurality of pin assemblies and a guide bar. The plug body has a longitudinal axis, a transverse axis perpendicular to the longitudinal axis and a tool-receiving hole. Each of the pin assemblies is movably disposed in the plug body and comprises a first rack component and a second rack component selectively engaging with the first rack component. The guide bar is coupled to the plug body and has a plurality of pin runners for engaging with the first rack components and a tool-receiving portion exposed by the tool-receiving hole. The guide bar is capable of moving along transverse axis-direction of the plug body to disengage the first rack components from the second rack components. | 11-12-2009 |
