2238 results about "Optical disc drive" patented technology

Methods and apparatuses to manage working states of a data processing system. At least one embodiment of the present invention includes a data processing system with one or more sensors (e.g., physical sensors such as tachometer and thermistors, and logical sensors such as CPU load) for fine grain control of one or more components (e.g., processor, fan, hard drive, optical drive) of the system for working conditions that balance various goals (e.g., user preferences, performance, power consumption, thermal constraints, acoustic noise). In one example, the clock frequency and core voltage for a processor are actively managed to balance performance and power consumption (heat generation) without a significant latency. In one example, the speed of a cooling fan is actively managed to balance cooling effort and noise (and/or power consumption).

The present invention relates to a disc array apparatus assuring that even if contradiction is detected in matching of parity data during a read parity check, correct host data is Restructured and can always be transferred to the host. The disc array apparatus of the present invention is particularly applicable to disc drives in the RAID configuration. For example, in a disc array apparatus of the present invention implementing RAID level 3, the disc array apparatus adds CRC data to data transferred from a host computer, divides the data, generates parity from the divided data, and stores the data and the parity data into the disc drives. During a read operation, the disc array apparatus of the present invention executes a read parity check. If contradiction is detected between the parity data stored in the disc drives and the parity data generated during the read parity check, the disc array controller sequentially assumes, one disc drive at a time, that one of the disc drives is storing erroneous data, restructures the host data from the divided data and parity data of the disc drives other than the disc drive storing erroneous data for each assumption, and executes a CRC check on the restructured host data for each assumption. Restructured host data is determined to be correct host data when the CRC check detects no error. The principle of the present invention is also implemented in other RAID levels, and using data such as time or counter value, to determine and restructure erroneous data.

A system and method of data encryption and decryption for controlling access to a data storage device such as a hard disk drive or optical drive is provided. The invented method utilizes data encryption and decryption techniques, combined with a token device, to control access to data stored on the data storage device.

A bio-disc device including new valve control means and fluid movement system, a bio-driver apparatus in which a controller disc including a controller for the bio-disc is installed, and an assay method using the same, which are suitable for labs-on-a-chips for various diagnostic assays, nucleic acid hybridization assays, and immunoassays, are provided. The bio-driver apparatus is compatible with general optical discs, including audio CDs, CD-Rs, game CDs, DVDs, etc., and the assay method is compatible with general optical disc drivers, including CD-ROMs, DVD players, etc. Thus, the bio-driver apparatus and the assay method offer and economical and convenient alternative to existing products. In addition, the bio-driver apparatus can be readily and easily applied in connection with a computer for remote diagnosis via the Internet.

A tilt compensator in an optical disk drive detects an optimum tilt setting of the objective lens with respect to a reference plane of the optical head, which allows the optical head to obtain an optimum characteristic of a disk signal at a specified radial position of an optical disk. The optimum tilt setting is corrected at a desired track of the optical disk by using a difference between a first tilt angle of the reference plane with respect to the optical disk measured at the specified radial position and a second tilt angle of the reference plane measured at a desire track of the optical disk. The disk signal is a RF signal, a jitter of the encoded RF signal, a tracking error signal or a wobble signal.

An optical disc drive utilized for transferring data to and/or from a header-included land/groove optical disc includes a motor, a spindle, a focusing lens, a laser, a pickup head, a memory, and a control circuit. A header position signal is utilized as a mask to eliminate false track readings produced by passing headers in a track count signal, improving track count and allowing more precise control over the accelerative and braking radial forces applied to the pickup head during a jump. Additionally, the memory includes computer code to delay initiating and/or ending a jump when passing headers may interfere with normal seek operations and may prevent some jumps in the immediate vicinity of an upcoming G/L Switch Line.

By avoiding the problem that in a hybrid optical disc with a standard-density recording area and a high-density recording area, an optical pickup designed to be suitable for the standard-density recording area cannot operate as desired in the high-density recording area and may cause a malfunction, damage to the disc drive or optical disc is prevented and optimal control is enabled. Access operation identification information such as reproducing identification information 225 indicating whether or not information recorded in the user data area 222 of the optical disc can be reproduced under the reproducing conditions of the optical disc driving apparatus is recorded in the lead-in area 222. The optical disc driving apparatus reads this type of access operation identification information, compares it with access operation identification information possessed by the optical disc driving apparatus, and if they do not correspond, does not carry out access operations by the optical head to the user data area 222, because reproducing or recording compatibility with the optical disc 201 is lacking.

A clock generating apparatus and clock generating method of an optical disc drive for calibrating a clock signal according to an input signal. The clock generating apparatus includes a frequency detector for detecting sampling times in a duration when the clock signal samples an interval between two synchronization patterns of the input signal, and for generating a first adjusting signal according to the sampling times, and a signal generator electrically coupled to the frequency detector for calibrating the clock signal according to the first adjusting signal.

An optical disc drive enclosure (10) includes a first cover (20) and a second cover (30). The first cover has a bottom plate and two first side plates (22). A locating plate (24) extends inwardly from a front upper edge of each first side plate, and two protrusion plates (26) are formed on an upper edge of each first side plate. The second cover has a top plate (31) and two second side plates (32). A locating slot (34) is formed at a front end of each second side plate, and can engage with the corresponding locating plate. Two cutouts (36) are defined in each second side plate. During assembly, the locating slots engage with the locating plates, with the second cover at an angle to the first cover. The second cover is then rotated downwardly so that the cutouts engage with the protrusion plates and the second side plates are clipped between the first side plates and the protrusion plates. The first cover and the second cover can then be fixed together by a pair of screws (59).

The method and system for psychological treatment by brain stimulation of the psychologically disordered object provide a possibility to stimulate the simple cells to assist the complex cells, and/or replace the complex cells in order to correctly perform the assigned command. An improved method includes the steps providing a creation of the psychoconduction code based on the simplified symbols, which by the audio, video, kinesthetic and/or olfactory stimulation simple cells to correct or replace the complex cells. An improved system comprises a controlling system comprising a processing system, including a controller and a memory, and a terminal device comprising at least one of a compact disk driver, a floppy disk driver, a printer and a control panel. Also, the improved system comprises an auxiliary equipment and a display connected to the controller, which is connected to the speaker(s).

A data processing system with an optical disk drive is provided with a magnetic disk drive as a cache. The magnetic disk drive is physically integrated with the optical disk drive. A semiconductor RAM is provided as a further cache for the magnetic disk drive and is physically integrated therewith.

A calibration for a tracking error signal gain in a tracking servo system of an optical disk drive is presented. The calibration determines the peak-to-peak tracking error signal when the tracking servo system is open, calculates a gain factor in response to the peak-to-peak tracking error signal, and calculates a new tracking error signal gain based on the tracking error signal gain and the gain factor. New tracking error signal gains are calculated until the gain factor is approximately one.

The present invention relates to loop gain adjustment of a focus/tracking servo in an optical disk apparatus, and provides an optical disk apparatus which can make the loop gain adjustment converge normally even in an optical disk in which prerecorded areas and recorded areas are mixed, and further which always has a stable servo system even when a gain is significantly varied due to changes in the disk state. When an inserted optical disk is determined to be a recordable optical disk by an optical disk type determination means 22, an optical pickup 1 is made seek a previously set area, thereby performing the loop gain adjustment. Further, when a gain is varied during the operation, a gain adjusting means 10 changes over a gain adjustment value.

Recording of data into a multilayer optical disk and reliable reproduction of the data are enabled. When user data are recorded on a multilayer optical disk having a first layer L0 and a second layer L1, the second layer L1 is formatted beforehand, to thus record dummy data. Subsequently, the user data are recorded into the first layer L0. Even after completion of recording of the user data at some point in the first layer L0, an area of the second layer L1 located immediately above or below a recorded area of the first layer L0 remains in a recorded state at all times. Compatibility with a play-only disk is maintained, and the play-only drive can reproduce the user data immediately after recording of the data.

A tray guide mechanism for an optical disc drive guides a backward and forward movement of a tray installed to slide into and out of a housing made of a lower case and an upper case. The tray guide mechanism includes guide rails installed to slide into and out of both sides of the upper case, a guide rail supporting unit installed at both sides of the lower case, to prevent the guide rails from deviating from a backward and forward moving path, and rail combiners formed at both sides of the tray in a moving path of the tray, and combined with the guide rails to slide into the guide rails. The tray guide mechanism also includes a forward moving distance limiting unit to limit a moving distance of the tray and the guide rails in a direction to which the tray and the guide rails project to prevent the tray from detaching from the housing. The tray guide mechanism also includes vertical and horizontal restrainers to prevent vertical and horizontal movement of the tray. The guide rails are shaped such that the rail combiners are inserted thereinto, and includes rails which slide into and out of the rail combiners while remaining in contact with the rail combiners. The guide rails also include rail covers which are fixed to outer sides of the rails and slide into and out of the lower case while being in contact with the lower case. The tray guide mechanism is configured such that a guide rail is installed in contact with a rail and a rail cover, and thus is strengthened to firmly support the tray and is installed in a narrow space of the compact optical disc drive. Also, the tray guide mechanism includes the vertical and horizontal restrainers that prevent vertical and horizontal vibration or swaying of the tray.

In accordance with the teachings of the present invention, an optical disc having a reduced planar thickness is provided. In accordance with a particular embodiment of the present invention, the optical disc includes a central clamping area that defines a central aperture operable to be engaged by a spindle mechanism of an optical disc drive, an optically-readable data storage area substantially surrounding the central clamping area, the optically-readable data storage area having a planar thickness of less than 1.20 mm, and one or more stacker elements coupled to, or integral with, the central clamping area, the stacker elements configured to increase the thickness of the central clamping area above the planar thickness of the optically-readable data storage area. In particular embodiments, the optical disc may further include a magnetic stripe disposed upon one surface of the optical disc.

A system and method employing optical disk drives for quantitative analysis of chemical and biochemical parameters, in which sensor materials disposed on an optical disk are responsive to physical, chemical, biochemical, and other parameters in the environment. The light interacts with the sensor materials when the light propagates through the sensor material, reflects off the optical media's reflective layer, and propagates back through the sensor region. The interacted light is captured by a photodetector, which outputs a response analog signal, for example, an analog voltage signal, which is indicative of a condition of the environment to which the sensor materials have been exposed. The system includes software algorithms which cause the laser source and optical detector to move to a specified location or logical block address of the disk, measure the optical signal during disk rotation, display a map of the sensor material response, and reduce the noise level in the measured signal.

Expiration information stored on an optical medium is applied to determine an expiration date of the optical medium that provides a predetermined reliability of information archived on the optical medium, such as a predetermined acceptable defect level of the information at the expiration date. An expiration engine associated with an information handling system or optical disc drive determines the expiration date from one or more factors, such as the manufacture date of read-only optical media, the initialization date of recordable optical media, a quality rating associated with a defect growth rate over time of the optical media, and a desired reliability. In one embodiment, the expiration engine writes expiration information to the optical media, such as a date stamp at initialization of a recordable optical medium. Alternatively, an expiration date is stored on an information handling system to provide expiration warnings a predetermined time before the expiration date.

A liquid crystal display with optical disk drive control functions is described. The liquid crystal display is utilized in a notebook/tablet dual-purpose computer. The liquid crystal display has a liquid crystal display panel, a plurality of control buttons, and an option determining device. The control buttons can directly control the optical disk drive to play an optical disk content on the liquid crystal display panel after the control functions of the control buttons are set by the option determining device. The option determining device is capable of switching within predetermined working functions of the liquid crystal display. The computer is capable of playing the optical disk content as a central processing unit thereof shuts down. The option determining device further includes an option controller and an option inductor to switch the liquid crystal display to a handwriting input panel and set the functions of the control buttons.