Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7826312 | Optical disc apparatus and control method for optical disc apparatus An optical disc apparatus includes: an optical pickup; a sled drive section that moves the optical pickup in a radial direction of an optical disc; and position control means for controlling, after bringing the optical pickup to an end of a moving range of the sled ... | 11/02/2010 |
| 7623417 | Optical disk device In an optical pickup driving mechanism using a stepping motor, a feeding operation of an optical pickup can be stabilized even in a broad operating temperature environment. In executing an optical axis correction feeding operation in response to an amount of lens sh... | 11/24/2009 |
| 7362665 | Seek method of optical disks and optical storage device An optical disk includes a first area, a second area having time information undistinguishable from time information of the first area and a third area having unique time information. The third area is divided into a plurality of sub-areas. Peculiar zone numbers are... | 04/22/2008 |
| 7336568 | Method and apparatus for long seeking control in an optical disc drive A method for controlling long seeking operation in an optical disc drive is provided. The optical disc drive includes a sled actuator, a pickup head installed on the sled actuator for reading and/or writing data in an optical disc, and a controller for controlling t... | 02/26/2008 |
| 7315491 | Disk driving apparatus and information readout method with selective servo control for read-out destinations of lands and grooves A disc driving apparatus and an information readout method according to the present invention realize optimum servo control of a readout unit in reading out the information from a recording medium having lands and grooves. The disc driving apparatus includes a unit ... | 01/01/2008 |
| 7248541 | Optical disk device and access method for optical disk device An optical disk device has a recording information management portion which detects a distribution of a recorded region R and an unrecorded region M based on reflection light received by an optical head and an access target setting circuit which determines an access... | 07/24/2007 |
| 7230886 | Speed error compensation method for optical storage device The present invention discloses a system for speed error compensation. A predetermined speed signal subtracts a feedback speed signal to generate a speed error signal, and a microprocessor receives the speed error signal and outputs a calculated result. A feedback c... | 06/12/2007 |
| 7210632 | On-axis control over scanning beam spot size and shape in electro-optical readers A cylindrical lens is axially moved along an optical axis to control a shape and size of a laser beam spot that is scanned across a symbol to be read by an electro-optical reader. ... | 05/01/2007 |
| 7196977 | Track jump control circuit for accessing optical disk drive In track jumping operation, an acceleration/deceleration pulse generation portion measures the TE signal amplitude during track jumping, and modifies the acceleration/deceleration time of the acceleration/deceleration pulse according to the measured amplitude to dri... | 03/27/2007 |
| 7196987 | Controller for data recorder A controller for controlling interruptions and restarts when writing data to a recording medium by emitting a laser beam against the recording medium. The controller prevents buffer underrun errors. The laser beam is emitted at a high power level when writing data o... | 03/27/2007 |
| 7177238 | Method and related apparatus for adapting rotation speed adjustments of a motor via a pause mode while accessing data from an optical disc A method and related apparatus for data accessing of an optical disk drive. The optical disk drive has a motor for rotating an optical disk and a pickup head. The pickup head is capable of writing data onto the optical disk according to a write-in clock. The method ... | 02/13/2007 |
| 7173887 | Carriage servo method and apparatus for determining and setting a drive signal A carriage servo apparatus according to the present invention comprises: a carriage for supporting a pickup that records or reproduces information relevant to an information recording face; and a carriage motor for moving the carriage in a direction parallel to the ... | 02/06/2007 |
| 7173886 | Track jump method for dual-layered optical disk reading device A method is disclosed for jumping tracks on a double-layer optical disk from a first address A on a first data layer to a target address D on a second data layer. According to the method, the first address A where the optical head is currently positioned is read. Th... | 02/06/2007 |
| 7167427 | Data recorder A data recorder for recording data that prevents buffer overrun errors emits a laser beam against a recording medium to record data. The data has a level that determines the power of the laser beam. When there is a possibility of a buffer overrun, data recording is ... | 01/23/2007 |
| 7145845 | Optical disc player having a carriage control system relying upon a multiplied periodic signal and a tracking error signal For reproducing and/or recording information from/onto an optical disc, a pickup is used to detect a target track on the disc through an optical beam. In carriage servo control, movement of the pickup is servo-controlled in the radial direction of the optical disc. ... | 12/05/2006 |
| 7116607 | Apparatus and method of removing disturbances during optical recording and/or reproducing An apparatus to remove periodic disturbances in a recording medium having large eccentricity and deflection mass includes an actuator to change a position of a pickup in response to a combination of first and second compensation signals, an error detector to detect ... | 10/03/2006 |
| 7095684 | System for actively controlling the lense of an optical pickup when not in operation The present invention relates to an optical media system (40) for suppressing externally induced rattle of an optical media pickup. The system (40) comprises: an optical pickup (41) for reading from and/or writing to an optical storage medium ( | 08/22/2006 |
| 7079464 | Focusing method of layer jumping for an optical storage device A focusing method of layer jump for an optical storage device to retrieve data from a multi-layer optical disc is disclosed. The optical disc includes first data layer and second data layer. Before layer jump, the focus is on the first data layer, and the second dat... | 07/18/2006 |
| 7061194 | Method and apparatus for controlling constant linear velocity of spindle motor using mirror signal A method and an apparatus for precisely controlling the rotation speed of a spindle motor in an optical system according to a given condition are provided. The method involves counting in response to a clock signal widths of first and second logic states of an input... | 06/13/2006 |
| 7042812 | Method and apparatus for canceling glitch noise from track cross signal A method and apparatus for canceling noise from track cross signal includes binarizing the track cross signal with reference to at least two reference values, and removing noise from the binarized track cross signal based on a command speed according to which a trac... | 05/09/2006 |
| 6996775 | Hypervideo: information retrieval using time-related multimedia: Disclosed is a method and device for selecting documents, such as Web pages or sites, for presentation to a user, in response to a user expression of interest, during the course of presentation to the user of a document, such as a video or audio selection, whose con... | 02/07/2006 |
| 6992957 | Controller of data recorder A controller of a data recorder that records data on a recording medium such that the occurrence of buffer underrun errors are prevented. Data encoded by an encoder is recorded on the recording medium. A decoder decodes the data recorded on the recording medium. The... | 01/31/2006 |
| 6990048 | Track jump control apparatus and track jump method A disk apparatus includes a DSP (digital signal processor), and the DSP controls respective circuit components under instructions of a MCU. During a track jump, a DSP core detects a zero-cross cycle of a TE (Tracking Error) signal just before. If a detected zero-cro... | 01/24/2006 |
| 6982935 | Pause control for a media player with a movable pickup A method and apparatus for suspending the operation of a rotating optical media player that uses simplified and efficient logic circuitry is described. When an operator initiates a pause operation, for example, by pressing a pause key, the current location of an opt... | 01/03/2006 |
| 6980384 | Extended position error signal for analog servo disk drive A system and method of extending the position error signal for a disk drive storage system using two digital-to-analog converters in a summing junction, including a typical A-B signal and a track error signal scaled to match a gain of the A-B signal. A track error i... | 12/27/2005 |
| 6973013 | Track jump apparatus capable of varying moving pulse and braking pulse A disk drive apparatus is disclosed for stabilizing a track jumping operation of an objective lens. The disk drive apparatus includes a detection section for detecting the direction that object lens is being moved by a tracking operation, and a discrimination sectio... | 12/06/2005 |
| 6937546 | Optical disk device with improved track jump features An optical disk device starts movement of a thread in a track-on state, and releases the track-on state when the thread moves by a certain amount, and gives a driving kick signal to an actuator. The movement of the thread and actuator can be placed in sufficiently g... | 08/30/2005 |
| 6922377 | Recorded disk reproducing device capable of adjusting control voltages A CPU compares a detected moving speed with a previously set reference moving speed and when the detected moving speed is smaller than the reference moving speed, controls to increase a motor driving voltage VM to be supplied to a motor and when the detected moving ... | 07/26/2005 |
| 6904232 | Method and apparatus for seeking the burst cutting area of DVD media Methods and apparatus for reading data from the burst cutting area of a digital video disc. The present location of an optical head assembly is determined. The distance from the present location of the optical head assembly to the burst cutting area is calculated. T... | 06/07/2005 |
| 6879549 | Brake circuit for three-beam optical tracking system A brake signal generating circuit and method for improving the efficiency of a lens brake in an optical disc reproducing system are provided. The brake signal generating circuit includes: a brake signal generator which receives a mirror signal that detects the track... | 04/12/2005 |
| 6873578 | Adaptive brake force setting system in an optical recording device The invention provides an adaptive brake force setting system. Every time when a pickup head with a predetermined mass crosses a plurality of recording tracks in an optical recording media, the system is used for selling brake force to make the pickup head stop from... | 03/29/2005 |
| 6826134 | Optical disk device with tracking adjustment and sled adjustment of optical pickup and method for controlling the device Optical disk device, in which tracking adjustment systems and a sled adjustment system are controlled independently, has offset value acquisition capability, which detects drive signals output from tracking adjustment systems and acquires tracking drive offset value... | 11/30/2004 |
| 6801480 | Optical disk drive apparatus capable of braking the optical head at half track short of target track When a lens 4a reaches a position which is a half track short of an objective track in a track jump, a servo processor 7 conducts a braking operation of an amount corresponding to the movement velocity of the lens 4a at the timing ... | 10/05/2004 |
| 6680880 | Apparatus for reproducing information from data-carrying disks CD playback apparatus for reproducing information from unfinalized CD-R disks which have no index information stored in a table of contents (TOC) area which scans a disk coarsely to detect the end of the recorded area approximately and scans the disk fine... | 01/20/2004 |
| 6621773 | Glitch protection method in optical storage device A track seeking and track locking method in an optical storage device capable of computing protection intervals such that any state transition of the TEZC signal and the RFZC signal within the computed protection interval is prohibited. The method is also... | 09/16/2003 |
| 6501709 | Read error reduction system for a disk player The disk player is capable of preventing a shift of an object lens in an optical pickup and a poor action caused by the shift. In the disk player, a first servo mechanism drives a motor, which moves an optical pickup in a radial direction of a disk. A sec... | 12/31/2002 |
| 6501708 | Disk drive apparatus Disclosed is a disk drive apparatus which has a manual search function with improved operability. Upon manual search for information TNO(n+1) recorded on the outer periphery of a information write/read medium to information TNO(n) recorded on the inner pe... | 12/31/2002 |
| 6442109 | Motor control apparatus, motor control method, disk apparatus and disk access method for correcting an assumed value based on error information Even if an assumed value of a track pitch and an actual value thereof are different from each other, an optical pickup (2) can be positioned at a target position at high speed, which can realize higher-speed access. A drive-means control apparatus accordi... | 08/27/2002 |
| 6349078 | Track-number seeking algorithm and seeking means for dynamic modification of track numbers computing in an optical storage device A track-number seeking algorithm and a seeking means for the dynamic modification of the computation of track numbers in an optical storage device employs a down counter, an up counter and a microprocessor. First, a rotation number of an optical storage d... | 02/19/2002 |
| 6349080 | Method and apparatus for efficient reading of data from disc record medium by selecting reading order of data units A data reading apparatus and a data reading method are disclosed which are structured to efficiently read data from a recording medium so as to improve data processing speed. A reading-order control circuit obtains first total jump time which is taken whe... | 02/19/2002 |
