Abstract: A system and method for filling hydrodynamic bearings with fluid. The fluid filling system includes a vacuum vessel for receiving the hydrodynamic bearing therein, a pump hermetically connected to the vacuum vessel and exhausting air from the vacuum vessel to the outside, an ultrasonic generator for generating vibrations in the vacuum vessel, and a fluid dispenser for dripping the fluid into the hydrodynamic bearing. When air is exhausted from the vacuum vessel to the atmosphere by the pump, the hydrodynamic bearing is vibrated by the ultrasonic generator and air is exhausted from a micro-gap between the shaft and sleeve of the bearing the atmosphere.

Abstract: A system and method for filling hydrodynamic bearings with fluid are disclosed. The fluid filling system of the present invention includes a fluid storage tank to store fluid therein, a vacuum vessel to receive a hydrodynamic bearing therein, a fluid dispenser for connecting the fluid storage tank to the vacuum vessel and dripping the fluid into a micro-gap of the hydrodynamic bearing, a pump connected both to the fluid storage tank and to the vacuum vessel and separately exhausting air from both the fluid storage tank and the vacuum vessel to the outside, and a nitrogen storage tank for separately controlling pressure in both the fluid storage tank and the vacuum vessel, wherein the fluid storage tank is pressurized using nitrogen such that the pressure in the fluid storage tank becomes higher than the pressure in the vacuum vessel, thus causing the fluid to move to the vacuum vessel and to be dripped into the hydrodynamic bearing received in the vacuum vessel.

Abstract: A bearing includes a hub to drive recording media; a sleeve to rotatably support the hub to define a hydrodynamic pressure generating space between the hub and the sleeve, the sleeve being formed with a fluid outlet through which the fluid passes at the predetermined position; a plurality of recesses to generate hydrodynamic pressure, the recesses being formed on at least one of the hub and the sleeve to be opened toward the hydrodynamic pressure generating space; and a fluid circulating member to circulate the fluid out-flowing from the fluid outlet to the hydrodynamic pressure generating space, the member being fixedly combined with the hub to slidably support the sleeve.

Abstract: A spindle motor having a hydrodynamic pressure bearing includes a stator, a rotor, and a dynamic pressure generating unit including a sleeve having an upper plate disposed opposite to the rotor and at least one thrust dynamic pressure groove formed either at the upper plate of the sleeve or at the rotor. Inside width from a neutral radius to an innermost radius of the thrust dynamic pressure groove is larger than outside width from the neutral radius to an outermost radius of the thrust dynamic pressure groove such that the neutral radius is biased to the outside of the thrust dynamic pressure groove. Dynamic pressure at the inside width of the thrust dynamic pressure groove is higher than dynamic pressure at the outside width of the thrust dynamic pressure groove such that fluid supplied into the thrust dynamic pressure groove is guided to the outer diameter side.

Abstract: A system and method for filling hydrodynamic bearings with fluid are disclosed. The fluid filling system of the present invention includes a fluid storage tank to store fluid therein, a vacuum vessel to receive a hydrodynamic bearing therein, a fluid dispenser for connecting the fluid storage tank to the vacuum vessel and dripping the fluid into a micro-gap of the hydrodynamic bearing, a pump connected both to the fluid storage tank and to the vacuum vessel and separately exhausting air from both the fluid storage tank and the vacuum vessel to the outside, and a nitrogen storage tank for separately controlling pressure in both the fluid storage tank and the vacuum vessel, wherein the fluid storage tank is pressurized using nitrogen such that the pressure in the fluid storage tank becomes higher than the pressure in the vacuum vessel, thus causing the fluid to move to the vacuum vessel and to be dripped into the hydrodynamic bearing received in the vacuum vessel.

Abstract: A system and method for filling hydrodynamic bearings with fluid is disclosed. The fluid filling system 100 of the present invention includes a vacuum vessel 110 for receiving the hydrodynamic bearing 10 therein, a pump 111 hermetically connected to the vacuum vessel 110 and exhausting air from the vacuum vessel 110 to the outside, an ultrasonic generator 140 for generating vibrations in the vacuum vessel 110, and a fluid dispenser 120 for dripping the fluid into the hydrodynamic bearing 10. When air is exhausted from the vacuum vessel 110 to the atmosphere by the pump 111, the hydrodynamic bearing 10 is vibrated by the ultrasonic generator 140 and air is exhausted from a micro-gap 13 between the shaft 11 and sleeve 12 of the bearing 10 to the atmosphere.

Abstract: Disclosed herein is a hydrodynamic bearing which has improved ability to efficiently seal fluid (lubricant), which generates dynamic pressure. The hydrodynamic bearing provides a fluid storage space that couples a fluid reservoir with a hydrodynamic space, in addition to a fluid reservoir defined by a spacer and a cover. The fluid storage space has a cross-section that gradually tapers in a fluid supply direction, thus serving as an additional fluid reservoir for sealing fluid and supplying the fluid to the hydrodynamic space, when necessary. Further, unlike the prior art, where a fluid surface is controlled in a relatively narrow fluid reservoir, the fluid surface can be controlled in a relatively wide fluid storage space, and air bubbles generated in the hydrodynamic space can be easily discharged to the outside, thus affording convenience when the hydrodynamic bearing is used.

Abstract: A folder type cellular phone and an automatic folder method includes a main body having a key pad and a hinge thereof in a first direction, a folder having a display, a driving source disposed on a lower portion of the folder in the first direction to generate a driving force, a power transmission unit having one end coupled to the driving source and the other end coupled to the folder to transmit the driving force to folder to rotate with respect to the main body when the folder is in an open state, and a rotation controller coupled to the power transmission unit and disposed in a housing installed at the hinge of the main body in a second direction perpendicular to the first direction to automatically and/or manually rotate the folder with respect to the main body.

Abstract: The present invention relates to a camera drive unit and a cellular phone equipped with the camera drive unit to provide users with convenience in use by making an automatic control of camera's position.

Abstract: A slide type cellular phone having two separate bodies automatically or manually sliding with respect to each other includes a first main body having a motor with a shaft, an elastic member elastically supporting the motor, and a switch activating the motor, a power transmitting unit coupled to the shaft of the motor to receive a rotation power from the motor, a pinion coupled to the power transmitting unit to be rotated by the rotation power, a second main body slidably coupled to the first main body, having a rack coupled to the pinion, and sliding with respect to the first main body according to movements of the pinion and the rack, and a sliding detecting unit detecting a termination of a sliding operation of the second main body to control the motor. The pinion, the rack, and the power transmitting member to operates by a rotation of the motor to automatically or manually slide the second main body with respect to the first main body, thereby providing a more convenient cellular phone.

Abstract: Disclosed is a folder driving device for a portable device.

Abstract: A spindle motor, having a hydrodynamic pressure bearing, including: a stator including a core, on which at least one winding coil is wound, and a base provided with a central hole formed through the central area of the main body thereof so that the core is placed on the upper surface thereof; a rotor including a hub having a magnet formed on the outer circumference thereof to correspond to the winding coil leaving a designated interval with the winding coil, and a stop ring installed on the inner circumference of the hub; and a sleeve, for supporting the rotation of the rotor, including at least one dynamic pressure generating groove formed on the outer surface thereof correspondingly contacting the inner circumference of the hub and the stop ring, and a hub receiving hole formed through the central area of the main body thereof assembled with the central hole of the base.

Abstract: Disclosed is an auto folder type mobile phone. More specifically, an auto folder type mobile phone for automatically opening/closing the folder by means of the driving means, the auto folder type mobile phone capable of preventing noise generation by eliminating the portion where direction of applied force is reversed instantly, upon opening/closing of the folder, is provided.

Abstract: Disclosed is a folder driving device for a portable device.

Abstract: A folder type cellular phone and an automatic folder rotating method used with the folder type cellular phone includes a main body having a key pad and a hinge thereof in a first direction, a folder having a display displaying data received from the main body, a driving source disposed on a lower portion of the folder in the first direction to generate a driving force, a power transmission unit having one end coupled to the driving source and the other end coupled to the folder to transmit the driving force to folder to rotate with respect to the main body when the folder is in an open state, and a rotation controller coupled to the power transmission unit and disposed in a housing installed at the hinge of the main body in a second direction perpendicular to the first direction to automatically and/or manually rotate the folder with respect to the main body. The folder is automatically or manually rotated with respect to the main body when the folder is in an open state.

Abstract: A slide type cellular phone having two separate bodies automatically or manually sliding with respect to each other includes a first main body having a motor with a shaft, an elastic member elastically supporting the motor, and a switch activating the motor, a power transmitting unit coupled to the shaft of the motor to receive a rotation power from the motor, a pinion coupled to the power transmitting unit to be rotated by the rotation power, a second main body slidably coupled to the first main body, having a rack coupled to the pinion, and sliding with respect to the first main body according to movements of the pinion and the rack, and a sliding detecting unit detecting a termination of a sliding operation of the second main body to control the motor. The pinion, the rack, and the power transmitting member to operates by a rotation of the motor to automatically or manually slide the second main body with respect to the first main body, thereby providing a more convenient cellular phone.

Abstract: The present invention relates to a camera drive unit and a cellular phone equipped with the camera drive unit to provide users with convenience in use by making an automatic control of camera's position.

Abstract: Disclosed is a folder operating apparatus for a cellular phone which can stably open and close a folder by compensating for the phase difference caused by the instability and the load of the folder operating apparatus by controlling the position of the folder.

Abstract: A vibration speaker layout is disclosed to maximize vibration quantity as vibration member is made feasible of resonation in vertical direction by individually furnishing signal input devices for sound generation and vibration generation respectively, which layout comprises a case 10; a vibration plate 20 in order to generate sound, the outside edge of which vibration plate is adfixed to top part of case 10; a voice coil 30 wound cylindrically whose top is adfixed to vibration plate 20; a vibration member 40 composed of magnet 41 and yoke 42 which vibration member is furnished under voice coil 30, which magnet is polarized up and down into N and S poles respectively, and which yoke constitutes magnetic circuit, having been attached to the magnet; an elastic member 50 that elastically supports between the vibration member and the case so that the vibration member may move up and down vertically; and a coil 60 of single phase to generate vibration which coil is attached to bottom surface of the case, facing the