| TOSHIBA AMERICA INFORMATION SYSTEMS, INC. Patent applications |
| Patent application number | Title | Published |
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| 20120033322 | DISK DRIVE TRACK ADDRESS ENCODED WITH A SERVO SECTOR ADDRESS - A servo sector address and a track address of a recording medium of a disk drive are encoded into a combined address value. The combined address value is stored in a combined address field that has fewer bits than the total bits required to uniquely encode the servo sector address and the track address. The position of a transducer head, indicated by the servo sector address and the track address, is determined by reading encoded values from two consecutive servo sectors on the recording medium and then decoding the encoded values. | 02-09-2012 |
| 20120033317 | POSITION ERROR SIGNAL DEMODULATION WITH TARGET-BASED BLENDING - In a disk drive, a method for servo burst-decoding demodulation that accommodates track pitch variation. Depending on the distance a read head is displaced from a read head target position, a target-based blending scheme, a position-based blending scheme, or a weighted combination of both is used to determine the position of the transducer head. When the transducer head is relatively close to the target position, the target-based blending scheme is used to decode servo bursts and calculate the exact head position. When the transducer head is relatively far from the target position, the position-based blending scheme is used to decode servo bursts and calculate head position. When the transducer head is an intermediate distance from the target position, a weighted combination of the target-based and position-based blending schemes is used. | 02-09-2012 |
| 20110310297 | CONSUMER ELECTRONIC PRODUCT HAVING INTEGRATED ROUTER OR GATEWAY - An example consumer electronic product such as a television includes a router or gateway contained within a housing of the television and a user interface for allowing configuration of settings associated with the router or gateway via one or more displays on a screen of the television. | 12-22-2011 |
| 20090086357 | IN DRIVE WRITTEN SPIRALS FOR SELF SERVO WRITING - A method of self servo writing is shown. In example embodiments, spirals or other indexing patterns can be written entirely within a hard disk drive, thus enabling self servo writing of the entire disk surface. Increased accuracy in spiral writing in turn increases the track density achievable using self servo writing techniques. One example method includes writing a first indexing pattern, then using the first indexing pattern to servo and write an adjacent second indexing pattern. Other example methods further include the use of back electromotive force (EMF) to increase accuracy in writing patterns such as spirals. | 04-02-2009 |
| 20080239555 | Multi-quadrant wedge offset reduction field values for disk drive servo - A method for servo correction includes determining a first wedge offset reduction field value for a read element from information in a servo burst area of a wedge on a disk, storing the first wedge offset reduction field value, determining a second wedge offset reduction field value for the read element from information in the servo burst area of the wedge on the disk, storing the second wedge offset reduction field value, and estimating an offset value of the read element from a desired track on the disk using at least one of the first wedge offset reduction value or second wedge offset reduction field value. | 10-02-2008 |
| 20080239548 | Multiple sector reassign on write error for disk drive - A disk drive includes a disk for storing information representing data, and a memory device. A method for writing includes locating a first data sector on a disk where a write operation fails, identifying the first data sector and a plurality of other data sectors near the first data sector as a grown defect, and storing the location of the first data sector and the plurality of other data sectors on a grown defect list. The memory device includes a list of grown defects that identifies a plurality of data sectors stored along a track between the first servo wedge and the second servo wedge on a selected track as data sectors which may not be written to. | 10-02-2008 |
| 20080239547 | DISK DRIVE APPARATUS, ELECTRONIC CIRCUIT FOR DISK DRIVE APPARATUS AND POWERING METHOD THEREFOR - According to one embodiment, a disk drive apparatus includes a disk having a plurality of tracks formed of approximately concentric patterns, a head slider reading and writing data from and to the disk, a motor driver configured to move the head slider to a target position on the disk, an electronic circuit configured to transfer the data to and from a host computer, and a power source configured to provide power to the electronic circuit based upon a position of the head slider. | 10-02-2008 |
