Patent application number | Description | Published |
20080250435 | Optical disk apparatus - An optical disk apparatus is disclosed which includes a first printed circuit board, on which a first circuit pattern is formed; a rotor, on which an optical disk may be placed, and which is electrically connected with the first circuit pattern; a second printed circuit board, which is stacked adjacent to the rotor on a surface of the first printed circuit board, and on which a second circuit pattern is formed; a sensor unit, which is mounted on the second printed circuit board in electrical connection with the second circuit pattern, and which is configured to sense a rotation of the optical disk; and a support plate, which supports the first printed circuit board and the rotor. In this optical disk apparatus, a separate printed circuit board can be utilized to support the sensor unit, whereby manufacturing costs can be reduced and working efficiency can be improved. | 10-09-2008 |
20090106782 | Auto balancing device and disc chucking device and disc driving device having the same - An auto-balancing device, and a disc chucking device and a disc driving device equipped with the auto-balancing device are disclosed. The auto-balancing device may include: a housing, which is coupled with a rotating body, and on which a boss is formed; multiple balancing members, which are rotatably supported by the boss, and in at least one of which a hole is formed; and a guiding roller, which is inserted in the hole, and which guides a movement of the balancing member. The auto-balancing device can be utilized to reduce noise and vibration for a rotating body during acceleration and deceleration and during high-speed rotations. | 04-23-2009 |
20090119690 | Disk chucking device and disk driving device having the same - A disk chucking device and a disk driving device having the same are disclosed. The disk chucking device may include: a chuck base, on which a boss is formed; chuck chips inserted in the chuck base in a manner such that the chuck chips protrude out from the chuck base; an elastic member, which elastically supports a pair of adjacent chuck chips towards an outer side of the chuck base; and a protrusion portion, which is formed on a bottom of the boss, and which supports the elastic member. The disk chucking device can improve the environment of the elastic members that support the chuck chips, to improve the alignment between the rotation centers of the disk and the chuck base. | 05-07-2009 |
20090262449 | Disk drive - A disk drive for driving a disk is disclosed, which includes: a driving unit configured to provide a driving force onto the disk, a main circuit pattern electrically connected with the driving unit, a sensor unit configured to sense a rotation speed of the disk, a first board supporting the sensor unit, a second board supporting the first board, and a base plate supporting the second board and the driving unit. One of the first board and the second board can be a flexible board electrically connecting the sensor unit with the main circuit pattern, and the other of the first board and the second board can be a rigid board. This disk drive can be utilized to ensure the distance between the sensor unit and the disk required for a rotation sensor to measure the rotation speed of the disk. | 10-22-2009 |
20110031834 | MOTOR - A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a rotational axis, a rotating body, which rotates together with the rotational axis as one unit, a hub having a ring-shaped body and a protruding part, in which the ring-shaped body is interposed between the rotational axis and the rotating body and the protruding part is protruded from the ring-shaped body towards the rotational axis and is in contact with the rotating body so as to extend an outer circumferential surface of the ring-shaped body coupled to the rotating body, and a housing, which supports and rotates the rotational axis, in which the housing having a supporting part is interposed between the rotational axis and the protruding part of the hub and supports the rotational axis. Thus, the rotor can be safely supported, providing the rotational stability of the rotor. | 02-10-2011 |
20110127865 | MOTOR - A motor is disclosed. The motor in accordance with an embodiment of the present invention includes a base, a shaft, which has an end part coupled to the base, a housing, which has a hollow part formed therein in such a way that the shaft rotatably supports the housing and in which the other end part of the base is inserted into the hollow part, and a rotor case, which includes an insertion hole and a supporting wall. The insertion hole has the housing inserted therein, and the supporting wall supports an outer circumferential surface of the inserted housing. | 06-02-2011 |
20120133661 | DISPLAY DRIVING CIRCUIT AND DISPLAY DEVICE INCLUDING THE SAME - A display driving circuit includes a clock dividing unit and a data processing unit. The clock dividing unit receives a first clock signal, generates a second clock signal having a second clock frequency by dividing the first clock signal having a first clock frequency, and outputs the second clock signal. The data processing unit receive the first clock signal, the second clock signal, and input data with a first data frequency, separates input data into first data and second data, outputs the first data based on the second clock signal, and outputs the second data with a second data frequency based on the first clock signal. | 05-31-2012 |
20130057763 | DISPLAY DRIVER, OPERATING METHOD THEREOF, HOST FOR CONTROLLING THE DISPLAY DRIVER, AND SYSTEM HAVING THE DISPLAY DRIVER AND THE HOST - An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal. | 03-07-2013 |
20150029201 | DISPLAY DRIVER, OPERATING METHOD THEREOF, HOST FOR CONTROLLING THE DISPLAY DRIVER, AND SYSTEM HAVING THE DISPLAY DRIVER AND THE HOST - An operation method of a display driver includes generating a count value by counting a period of a synchronization signal related to a synchronization packet received from a host, receiving a mode change command from the host, the mode change command indicating a change from a video mode transmitting first image data to a display by bypassing a frame memory to a command mode transmitting second image data to the display through the frame memory, and generating an internal synchronization signal having a period substantially equal to the period of the synchronization signal by using the count value based on the mode change command after a last pulse of the synchronization signal is generated. A time interval between the last pulse and a first pulse of the internal synchronization signal is equal to the period of the synchronization signal. | 01-29-2015 |