Abstract: A soft start circuit is connected to a pulse width modulation controller including an oscillator, and a functionality of modulating amplitude to a pulse width and a power supply includes the soft start circuit. The soft start circuit includes a frequency controlling unit, a duty ratio establishing unit, and a variable switching unit. The frequency controlling unit generates first and second parameter signals for determining a frequency signal frequency by a power source from the PWM controller and provides them to the PWM controller. The duty ratio establishing unit generates a third parameter for determining amplitude of the frequency signal generated by the PWM controller according to a reference voltage, and provides it to the PWM controller. The variable switching unit determines whether it is a first predetermined time from a start-up state, and controls the first parameter of the frequency controller during the first predetermined time.

Abstract: In a semiconductor device having a plurality of fuses and a method of fabricating the same, the semiconductor device comprises an inter-layer dielectric layer on a semiconductor substrate; a plurality of fuses on the inter-layer dielectric layer, an inter-metallic dielectric layer on the plurality of fuses and the inter-layer dielectric layer, a passivation layer on the inter-metallic dielectric layer, fuse windows exposing portions of a top surface and sidewall surfaces of the plurality of fuses, and a fuse barrier pattern between adjacent ones of the plurality of the fuses.

Abstract: A controller board includes a memory and a timing controller. The memory stores previous frame image data. The timing controller outputs driving image data based on current frame image data supplied from an external device and the previous frame image data. The timing controller disperses a frequency band of the current frame image data within a reference frequency range to generate dispersed current frame image data and transmits the dispersed current frame image data to the memory.

Abstract: A head parking ramp for a data storage device includes a fixed portion fixed to a base member, a support portion extending from the fixed portion toward the disk and supporting an end portion of an actuator where the read/write head is installed, an extended portion extending from the fixed portion toward the disk, having a lead end portion overlapping each of an upper surface and a lower surface of an outer circumferential portion of the disk, and having a plurality of disk facing surfaces facing each of the upper and lower surfaces of the disk, and a protruding surface protruding from each of the disk facing surfaces of the extended portion at a position corresponding to an edge portion of the disk and restricting a vibration of the disk as the edge portion of the disk contacts the protrusion surface when the disk vibrates.

Abstract: A method of coupling a voice coil motor to a bowl-type base plate of a hard disk drive is described for a hard disk drive including a voice coil motor having a coil coupled to a rear end portion of an actuator arm, an upper yoke and a lower yoke provided at upper and lower portions of the coil respectively, a bowl-type base plate having a plurality of flattened structures for fastening the lower yoke in a position relative to the bowl-type base plate and a countersink formed in the lower yoke.

Abstract: One or more embodiments of the present disclosure relate to a circuit board having a substrate and a plurality of differential signal lines formed on the substrate and transmitting differential signals. The differential signal lines include a first signal line and a second signal line. The first signal line and the second signal line extend along at least two paths that are parallel to each other. The paths of the first signal line and the second signal line switch at path change portions, and the path change portions of neighboring differential signal lines are positioned at different distances away from an edge of the circuit board along the length direction of the differential signal line.

Abstract: An actuator latch device for locking an actuator of a hard disk drive, the actuator having a swing arm rotatably installed at a base member, a voice coil motor (VCM) coil provided at one end of the swing arm, and magnets oppositely arranged at the VCM coil. The actuator latch device includes a notch provided at one end of the swing arm; a latch lever, which is rotatably installed at a base member, having at a first end thereof a hook interfering with the notch to restrict one way rotation of the swing arm, and a counterbalance device at a second end thereof; and a stopper provided in the base member to block the counterbalance device to restrict a rotation of the latch lever.

Abstract: An actuator latch apparatus for locking a swing arm of a disk drive is described. The apparatus includes a notch provided at an end portion of the swing arm; a latch lever rotatably installed on the base member and including a hook formed to interfere with the notch when the actuator is locked; a first latch pin applying a torque to the latch lever due to a magnetic force of the magnet in a first direction; a second latch pin extending from the latch lever; an attraction part protruded from an edge of the yoke, the attraction part being magnetized by the magnet and adsorbing the second latch pin when the actuator is locked; and a solenoid coil winding around the attraction part and offsetting a magnetism of the attraction part due to a supply of power when the actuator is unlocked.

Abstract: A soft start circuit is connected to a pulse width modulation controller including an oscillator, and a functionality of modulating amplitude to a pulse width and a power supply includes the soft start circuit. The soft start circuit includes a frequency controlling unit, a duty ratio establishing unit, and a variable switching unit. The frequency controlling unit generates first and second parameter signals for determining a frequency signal frequency by a power source from the PWM controller and provides them to the PWM controller. The duty ratio establishing unit generates a third parameter for determining amplitude of the frequency signal generated by the PWM controller according to a reference voltage, and provides it to the PWM controller. The variable switching unit determines whether it is a first predetermined time from a start-up state, and controls the first parameter of the frequency controller during the first predetermined time.

Abstract: According to one embodiment, a plasma display device has a plurality of pixels for displaying images during frames using an input video signal, each of the frames being divided into a plurality of sub-fields, each of the sub-fields including a reset period, an address period, and a sustain discharge period, and the images having gray levels according to combined brightness weights of the sub-fields. The plasma display device includes an address power controller for reducing the gray level of a first pixel of the pixels by decreasing a sum of the brightness weights of the sub-fields, and for increasing the gray level of a second pixel of the pixels by increasing a sum of the brightness weights of the sub-fields, the second pixel being adjacent to the first pixel and the gray level of the second pixel being lower than the gray level of the first pixel.

Abstract: An actuator latch system of a hard disk drive (HDD) retains a rotatable swing arm of the HDD in place when a magnetic head of the HDD is parked. The actuator latch system includes a portion of the swing arm that defines a notch at an end portion of a swing arm, and a latch lever that has at least one main hook and a rebound hook, and an elastic buffering arm. The latch lever is disposed on the base member adjacent the end portion of the swing arm and is supported so as to be rotatable. The at least one main hook prevents the swing arm from initially rotating in one direction beyond a certain point, and the rebound hook prevents the swing arm from rotating beyond a certain point after the swing arm rebounds upon colliding with the at least one main hook.

Abstract: An actuator latch system of a hard disk drive (HDD) retains a rotatable swing arm of the HDD in place when a magnetic head of the HDD is parked. The actuator latch system includes a portion of the swing arm that defines a notch at an end portion of a swing arm, and a latch lever that has first and second hooks at one end thereof. The latch lever is disposed on the base member adjacent the end portion of the swing arm and is supported so as to be rotatable. The first hook is disposed to contact the swing arm within a short period of time after a shock transmitted to the swing arm while the magnetic head is parked causes the swing arm to rotate in one direction. Thus, the impulse on the swing arm is minimized and the reliability of the actuator latch system is enhanced.

Abstract: An actuator latch system of an HDD retains a swing arm in place when the magnetic head of the HDD is parked. The actuator latch system includes a rotatable latch lever that has a hook designed to absorb shock when the hook engages the swing arm. A rear end of the swing arm has a corner portion where first and second surfaces of the rear end of the swing arm meet at a point of inflection. The hook has a first portion, a second portion, and a third portion extending between and connecting the first and second portions. Inner surfaces of the first, second, and third portions delimit a slot. The inlet of the slot has a width that is less than a width of the corner portion.

Abstract: An actuator latch apparatus usable with a hard disk drive apparatus includes a latch lever disposed on a base to pivot thereon and having a first latch prevention portion to prevent pivoting of an actuator arm in a direction, the actuator arm having a bobbin formed at a rear end portion thereof, and a bobbin protruding portion having a first catch portion provided at the bobbin and an auxiliary catch portion provided at the bobbin separated from the first catch portion to lock with the first latch prevention portion when the first catch portion is not caught by the first latch prevention portion.

Abstract: The present invention relates to a location-based service method and system using location data included in image data, particularly to a method and a system of providing the location-based service with photos taken by a camera phone, using location information at the shooting time. The location-based service method according to the present invention, using the image data provided using a terminal equipped with a camera and the location data including the location information of the terminal, comprises the steps of shooting a target image with the terminal at a predetermined location and generating first image data; receiving the location data; including the received location data in the first image data and generating second image data; and displaying an image corresponding to the first image data and providing a service using the location data, if the second image data are selected.

Abstract: A suspension assembly of an actuator for a disk drive to support a slider, on which a read/write head is mounted, elastically biased toward a surface of a disk. The suspension assembly includes: a load beam coupled to an end of a swing arm of the actuator; a flexure supporting the slider and having a fixed end fixed to a surface of the load beam facing the disk and a free end disposed close to a leading end of the load beam; an extender extending from the free end of the flexure; and a limiter limiting a range of up and down vibrations of the extender.

Abstract: An asymmetrical DC to DC converter using one or more NAND gates. In one embodiment, an asymmetrical DC to DC converter includes a converter unit including a switching unit and adapted to transform a first voltage having a first level to a second voltage having a second level according to a switching operation of the switching unit and an output voltage control unit including at least one NAND gate and adapted to control the second level of the second voltage to be substantially uniform. The output voltage control unit is further adapted to generate a driving signal for the switching unit via the at least one NAND gate. As such, an asymmetrical control circuit that is suitable for an asymmetrical half bridge converter or an active clamp converter can be simply and inexpensively realized using a NAND gate instead of using expensive dedicated chips.

Abstract: A filtering apparatus of a hard disk drive which includes an actuator to move a read/write head to a predetermined position over a disk and a flexible printed circuit (FPC) bracket installed in a corner of the base member. The filtering apparatus includes: a filter holder protruding from one side of the FPC bracket toward the read/write head; and a filter disposed in the filter holder which filters foreign materials in air flowing in the disk drive.

Abstract: A voice coil motor coupling structure of a hard disk drive for coupling a voice coil motor to a base plate of the hard disk drive, the voice coil motor includes a coil coupled to a rear end portion of an actuator arm, an upper yoke and a lower yoke provided at upper and lower portions of the coil, respectively, separated at a predetermined distance from the coil, and a magnet attached to the lower surface of the upper yoke.

Abstract: The present invention relates to novel piperidine derivatives having effect of inhibiting acetylcholinesterase and aggregation of ?-amyloid, Alzheimer's disease-induced protein, and treatment for Alzheimer's disease containing the same, the piperidine derivatives represented by Formula 3.