Samsung Electronics Co., Ltd.

Samsung Electro-mechanics Co., Ltd.

Samsung Techwin Co., Ltd.

Seagate Technology International

Dong-il Cho

Sung-wook Kim

Walter Jun

Jae Eun Kim

Jun-bum Shin

Youn-Tai Kim

Jaehwan Lim

Hong-taek Lim

So-Geum Kim

Daehun You

Hyungjin Kim

Young-chul Sohn

Chul-Joo Kim

Seung-Joo Shin

Byoung-gyou Choi

Jin-su Kim

Kyoung-yong Lee

Seung-Woo Lim

Hye-jin Shin

Yong-han Song

Kyung-yul Lee

Eui-Joong Kim

Jae Hwan Lim

Byung-hun Kim

Yong-San Shin

Chun-Gi Kim

Oh-Byoung Kwon

Woo-Seok Choi

No-Jun Kwak

Jae-in Ko

Dae Hun You

Seok-Soon Back

An electronic device includes: a power supply to supply a first power and a second power; a first solid state drive (SSD) backplane and a second SSD backplane to receive the first power from the power supply, each of the first solid state drive (SSD) backplane and the second SSD backplane including two or more SSDs; and a baseboard to receive the second power from the power supply, to independently power on and power off the first SSD backplane and the second SSD backplane, and to access the SSDs of an SSD backplane that is in a power-on state from among the first SSD backplane and the second SSD backplane. In response to an increase in temperature of an SSD backplane that is in a power-off state, at least one SSD of the SSD backplane that is in the power-off state may be powered on.

Solid state drive, electronic device including solid state drive, and method of managing solid state drive

A storage device includes a nonvolatile memory device and a controller that accesses the nonvolatile memory device based on a request of an external host device, receives a first clock signal from the external host device, generates a second clock signal through frequency multiplication of the first clock signal, and communicates with the external host device based on the second clock signal. The controller requests the external host device to adjust a multiplication ratio for the frequency multiplication of the first clock signal.

Storage device and operating method of storage device

A redundant array of independent disks (RAID) storage device including; a memory device including first memory devices configured to store at least one of data chunks and corresponding parity (data chunks/parity) and a second memory device configured to serve as a spare memory region, and a RAID controller including a RAID internal memory configured to store a count table and configured to control performing of a rebuild operation in response to a command received from a host, wherein upon identification of a failed first memory device, the RAID controller accesses used regions of non-failed first memory devices based on the count table and rebuilds data of the failed first memory device using the second memory device.

RAID storage device, host, and RAID system

A method and device for securing data of a message is provided. A method for encrypting a message of a user terminal device includes: receiving a message via a message input window; displaying the received message; encrypting the message by using a key index and an encryption key corresponding to a chatting window for the message based on an instruction for transmitting the message to another chatting party being received; and transmitting the encrypted message to the other chatting party.

Method and terminal device for encrypting message

An electronic device is disclosed. The electronic device which is included in a home network, the device includes a sensor, a communicator comprising communication circuitry configured to communicate with an external device which is included in the home network, and a processor configured to control the communication circuitry, to encrypt first data which is initially acquired from the sensor with a first encryption algorithm and transmit the encrypted standard data to the external device, determine third data based on the first data and a second data in response to the second data being acquired from the sensor after the first data is acquired, to encrypt the third data with a second encryption algorithm and to transmit the encrypted third data to the external device.

Electronic device, communication method and encrypting method thereof

A base member including two-step recesses and a hard disk drive (HDD) including the same. The HDD includes a base member; a spindle motor installed in the base member; a data storage disk assembled to the spindle motor; and an actuator rotatably installed in the base member and for moving a read/write head to a desired position on the disk, wherein the base member includes: a first floor surface disposed in a region facing the disk and having a center portion in which the spindle motor is installed; a shroud formed on a circumference of the first floor surface and extending the exterior circumference of the disk; and two-step recesses formed in an operating region of the actuator, wherein the two-step recesses comprise a first step recess formed on the first floor surface and a second step recess formed on a floor surface of the first step recess. An extended shroud is formed in an upstream side of an operating region of the actuator of the base member, protrudes from the shroud, and extends along the exterior circumference of the disk. An air block is installed in a downstream side of the operating region of the actuator.

Two-step recess base

An Inkjet head according to an exemplary embodiment of the present invention includes an ink storage unit including an inner storage space, a head unit connected to the ink storage unit, and a plurality of nozzles discharging the ink, wherein the floors of the inner storage space of the ink storage unit form a step. Accordingly, in the Inkjet head of an exemplary embodiment of the present invention, the floors of the inner storage space of the ink storage unit form a step, and the ceiling of the inner flow space of the head unit is inclined, thereby preventing the ink vapor from being confined inside the head unit. Therefore, the ink to be discharged through the nozzle flows in a predetermined direction and does not include ink vapor, thereby preventing discharge deterioration.

Ink jet head and ink supplying method thereof

An apparatus for heating a chip includes: a laser generator for emitting a laser beam to a semiconductor chip to heat the semiconductor chip; and a beam intensity adjuster disposed on a laser emission path between the semiconductor chip and the laser generator to equalize the intensity of the laser beam to be emitted to the semiconductor chip. A flip chip bonder having the chip heating apparatus, and a method for bonding a flip chip using the same are also provided.

Flip chip laser bonding process

A nozzle drive control device and method includes applying a drive voltage to a nozzle, sensing a size or speed of an ink droplet ejected by the applied drive voltage, determining whether the sensed result is included within a predetermined range, and calculating the drive voltage to eject an ink droplet when the sensed size or ejecting speed of the ejected ink droplet is not included within the predetermined range.

Nozzle drive control device and method

A rotor blade and an HDD (hard disk drive) having the same, wherein the rotor blade is mounted together with a disk-shaped data storing medium on a spindle motor of the HDD to rotate coaxially with the disk-shaped data storing medium. The rotor blade includes a plurality of blades to increase a floating force applied to a slider that records or reads data on or from the disk-shaped data storing medium by increasing a speed of an airflow in an inner region of the disk-shaped data storing medium.

Rotor blade and hard disk drive having the same

A hard disk drive comprising balance weight integrally coupled to a clamp is provided. The hard disk drive comprises a disk stack assembly comprising a disk, a spindle motor comprising a rotational shaft and a spindle motor hub adapted to support the disk, and a clamp comprising a plurality of installation holes. The hard disk drive further comprises at least one clamp screw and a balance weight integrally coupled to the clamp and adapted to compensate for an imbalance in the disk stack assembly.

Hard disk drive having a balance weight to compensate for an imbalance in the disk stack assembly

A head stack assembly includes a head stack assembly main body moving a head across a disk, and rotating around a predetermined pivot shaft. The head stack assembly also includes a center of gravity compensation portion coupled to the head stack assembly main body and compensating for imbalances in the center of gravity of the head stack assembly main body to be not more than a reference imbalance value. The reference imbalance value is based on an imbalance value of the center of gravity of the head stack assembly main body measured with respect to a rotational center of the pivot shaft.

Head stack assembly, hard disk drive having the same, and hard disk drive method including center of gravity compensation

An optical pickup device including a dual wavelength light source module for emitting a selected one of two light beams having different wavelengths, a dual grating for splitting, into three beams, the selected light beam emitted from the dual wavelength light source, and a hologram for focusing the three beams of the selected light beam onto a photodetector having typical 8-section patterns such that the three beams of the selected light beam are focused onto the same spots as those of the other light beam, respectively.

Optical pickup device

A vehicle detector comprising a loop sensor, phase lock loop (PLL), frequency change detector, and a micro-processor including a logic circuit. Output of the PLL and the frequency change detector is inputted to the logic circuit, and the logic circuit performs logical OR operation of the output of the PLL and the output of the frequency change detector. The output of the logic circuit is used as a vehicle detection signal. The vehicle detector can detect vehicles at a low speed as well as vehicle at high speed accurately.

Growing community of inventors

Suwon-si, South Korea

Sung-wook Kim