Abstract: A touch sensor may include a substrate and may include electrode units, first demultiplexers, second demultiplexers, and driving pads all located on the substrate. The electrode units each may include a plurality of electrode groups, the electrode groups each including a plurality of touch electrodes. The first demultiplexers each may include a plurality of sub-demultiplexers and each may be electrically connected to a corresponding one of the electrode units. Each of the sub-demultiplexers of a first demultiplexer may be electrically connected to a corresponding one of the electrode groups of a corresponding electrode unit. The second demultiplexers may be connected between the first demultiplexers and the driving pads.

Abstract: Systems and methods are disclosed that implement asymmetrical write fault thresholds. A data storage device may apply a different write fault threshold to each side of a target track, allowing a write head to deviate from a track center more in one direction than in the other direction. In some embodiments, the asymmetrical write fault thresholds may be applied to shingled tracks, allowing a lower write fault threshold to be applied in the direction of previously written shingled tracks, and a higher write fault threshold to be applied in the direction of tracks which are not yet written.

Abstract: A hybrid storage apparatus having a plurality of storage devices and a method of sharing resources therein. The hybrid storage apparatus can include a plurality of storage device controllers to respectively control a plurality of storage devices that employ different writing methods, a system controller to exchange information with the storage device controllers such that the plurality of storage devices are controlled in one system and in an integrated manner, a reset signal generation unit to output a reset signal that is in a first logic state via an output terminal when a power supply voltage used in the system is equal to or greater than a reference voltage, and a connection unit to electrically connect the output terminal of the reset signal generation unit to a reset signal input terminal of the system controller and to reset signal input terminals of the storage device controllers.

Abstract: In a method of determining an iteration value for an iterative decoding process of a hard disk drive, a bit error rate (BER) of a digital signal is measured in multiple iterations. A difference is calculated between BERs of consecutive iterations, and the calculated differences are compared with a reference value. An adjusted iteration value is then determined based on the comparison.

Abstract: A method of managing defects of a recording medium of a data storage device includes performing a quality test related to occurrence of errors for each data sector in the recording medium; classifying a quality of each data sector according to evaluation criteria corresponding to quality classifications based on the quality test; determining a number of data sectors in each quality classification; and defect-processing the data sectors of the quality classifications that range from a lowest quality classification to a highest quality classification within a defect management limitation of the data storage device.

Abstract: In a method of determining an iteration value for an iterative decoding process of a hard disk drive, a bit error rate (BER) of a digital signal is measured in multiple iterations. A difference is calculated between BERs of consecutive iterations, and the calculated differences are compared with a reference value. An adjusted iteration value is then determined based on the comparison.

Abstract: A hybrid storage apparatus having a plurality of storage devices and a method of sharing resources therein. The hybrid storage apparatus can include a plurality of storage device controllers to respectively control a plurality of storage devices that employ different writing methods, a system controller to exchange information with the storage device controllers such that the plurality of storage devices are controlled in one system and in an integrated manner, a reset signal generation unit to output a reset signal that is in a first logic state via an output terminal when a power supply voltage used in the system is equal to or greater than a reference voltage, and a connection unit to electrically connect the output terminal of the reset signal generation unit to a reset signal input terminal of the system controller and to reset signal input terminals of the storage device controllers.

Abstract: Provided is a method and apparatus for detecting and correcting a defect of a recording medium. The method includes: monitoring a gain variation of a variable gain amplifier (VGA) amplifying a signal detected from a recording medium; detecting a defect location based on the gain variation of the VGA; and performing error correction by determining the detected defect location as a location of a symbol of which the error occurrence is predicted.

Abstract: An off-track retry method for recovering data incorrectly read due to a read error caused by an off-track error in a disk drive. The off-track retry method includes extracting read gain characteristics while varying an off-track amount, determining an off-track amount, i.e., off-track direction and degree, based upon the read gain characteristics, reading data using the determined off-track amount, and determining whether the read data is normal and determining whether the data incorrectly read due to the read error has been recovered based upon the result.

Abstract: An off-track retry method for recovering data incorrectly read due to a read error caused by an off-track error in a disk drive. The off-track retry method includes extracting read gain characteristics while varying an off-track amount, determining an off-track amount, i.e., off-track direction and degree, based upon the read gain characteristics, reading data using the determined off-track amount, and determining whether the read data is normal and determining whether the data incorrectly read due to the read error has been recovered based upon the result.