Abstract:
A hard disc drive includes a base having a moving region in which an air damping ramp adjacent to a recording surface of a disc, a slider, and a driving unit which holds the slider, move. A bottom of the moving region is lower than the air damping ramp, and has a channel that is recessed at the bottom of the moving region and extends along a moving path of the slider. Thus, the hard drive reduces a vortex that forms around a head gimbal assembly (HGA) due to an application of insufficient preload onto HGA or a defective HGA. Accordingly, vibration of the HGA due to the vortex decreases, thus rendering a position error signal (PES) more accurate and reliable.
Abstract:
A hard disk drive including a flexible printed circuit (FPC) in which a base layer and a cover layer are arranged with a circuit layer therebetween. In addition, a damping material is coupled at a predetermined portion of the signal patterns in the circuit layer so as to cross the signal patterns. The hard disk drive reduces vibration energy over an entire frequency band to minimize the effect of vibration on servo control and improve the performance of the hard disk drive.
Abstract:
An image processing device, a portable information processing device and a controlling method thereof are provided. The image processing device includes a first storage storing user attribute information applied to the image processing device; and a first controller, provided that different user attribute information is downloaded to the portable information processing device, updating the user attribute information of the image processing device with the different user attribute information of the portable information processing device. Therefore, the user can apply the same attribute information to other image processing devices.
Abstract:
An actuator of a hard disk drive (HDD). The actuator includes an actuator arm installed to be rotatably connected to a base plate of the HDD and having a pivot hole, a VCM (voice coil motor) coil connected to a rear portion of the actuator arm, upper and lower yokes respectively installed upper and lower the VCM coil, a VCM motor having a magnet provided therebetween; and a flexible printed circuit for driving the actuator. Here, a boss is formed at the actuator arm to be face the base plate and to be connected to the flexible printed circuit.
Abstract:
A balancer installed on an overmold of an head stack assembly to adjust balance of the head stack assembly is formed of stainless steel and demagnetized through a thermal treatment after the stainless steel is processed to have a balancer shape. The balancer has a recess formed at a side surface of the balancer to prevent separation of the balancer from the overmold. The stainless steel is austenite based stainless steel.
Abstract:
An actuator of a hard disk drive (HDD). The actuator includes an actuator arm installed to be rotatably connected to a base plate of the HDD and having a pivot hole, a VCM (voice coil motor) coil connected to a rear portion of the actuator arm, upper and lower yokes respectively installed upper and lower the VCM coil, a VCM motor having a magnet provided therebetween; and a flexible printed circuit for driving the actuator. Here, a boss is formed at the actuator arm to be face the base plate and to be connected to the flexible printed circuit.
Abstract:
An actuator of a disk drive to move a read/write head for recording and reproducing data to a predetermined position on a disk, the actuator includes a swing arm rotatably installed inside the disk drive, a suspension coupled with a leading end portion of the swing arm and supporting a slider on which the head is mounted, and an absorption filter attached with one side of the swing arm to confront an airflow in a predetermined direction according to rotation of the disk, and to absorb foreign materials in the airflow.
Abstract:
A method and an apparatus to control a disc drive, and more particularly, a method and an apparatus to control a disc drive using an indirectly determined counter-electromotive force. The method of controlling the disc drive using a counter-electromotive force includes determining a change in a servo parameter of the disc drive; and controlling the disc drive based on the determined change.
Abstract:
A method and an apparatus to control a disc drive, and more particularly, a method and an apparatus to control a disc drive using a counter-electromotive force, prevents collision and malfunction of a transducer and a disc by determining external vibrations and magnitude of a shock without installing an additional shock sensor in the disc drive. The method of controlling the disc drive using a counter-electromotive force includes detecting a voltage applied to a voice coil during a predetermined mode, performing an operation of a value of the counter-electromotive force using the detected voice coil voltage comparing the value of the counter-electromotive force operated with a predetermined threshold, and when the value of the counter-electromotive force is equal to or larger than the predetermined threshold, controlling a voice coil motor and a spindle motor so that a current mode is stopped and a parking or unloading mode is executed.
Abstract:
Provided is a flexible printed circuit including a circuit layer with a desired circuit formed thereon, a base layer supporting the circuit layer, a conductive metal layer positioned on at least one side of the base layer, and an insulation film interposed between the base layer and the conductive metal layer. A hole is formed on the circuit layer and the base layer through punching work, and the insulation film covers one end of the hole.