Samsung Electronics Co., Ltd.

Penta Security Systems Inc.

Duk-Soo Kim

Eui-Seok Kim

Hyoung-Taek Lim

Jong-Wook Jeong

Min-Woo Gu

Seok-Woo Lee

Eui-seok Kim

Jin-Hyuk Jung

Gyung-Yeol Kim

Yong-Baek Yoo

Tae-Joon Jung

A data storage device, a method of operating the data storage device, and an electronic system including the data storage device are provided. The data storage device includes a controller mounted on a substrate, and a plurality of memory packages configured to be controlled by the controller and to transmit and receive data to and from the controller via M channels (where M is an integer of 1 to 16). When the data storage device is used, a phenomenon in which heat generation is concentrated locally may be mitigated.

Data storage device, operating method of the same, and electronic system including the same

Provided is a data security method and apparatus using a characteristic preserving encryption. The data security apparatus includes an interface communicating with a user terminal or a database server, an input unit receiving information, an output unit outputting information, an encryption unit encrypting data in the data security method, a storage unit storing information, and a control unit controlling functions of the interface, the input unit, the output unit, the encryption unit or the storing unit.

Data security method and apparatus using a characteristic preserving encryption

A system and method for providing an instant messaging (IM) service via a Code Division Multiple Access (CDMA) mobile network is provided. A Session Initiation Protocol (SIP) server is connected to the mobile network and an instant messaging service (IM) server via the Internet. The SIP server performs a proxy function for the mobile network allowing the mobile terminal connected to the Internet via the network to receive an instant messaging service from the IM server. The SIP server relays a SIP message, including an instruction word, an instant message or a processed result for an instant messaging service, between the IM server and the terminal. An additional call control according to the Internet protocol in a system is performed, which makes it possible for a user connected to the Internet via the mobile network to communicate instant messages with selected buddies or colleagues.

Method and system for providing an instant messaging service in a mobile communication network

A laser printer and printing method for obtaining high quality of a picture by using different DPIs between a printer engine and data for printing, which includes a PC interface unit for receiving rasterized data from a PC connected to a printer; a band memory for storing the data transmitted from the PC interface unit; a main controller for reading and transmitting the data stored in the band memory; a clock generating unit for generating a clock for transmitting the data; a line buffer memory for temporarily storing the read data; and a line buffer control unit for controlling the line buffer. A printing method includes receiving data from the PC and storing the data in a band memory, comparing the DPI of data with that of the printer engine, and transmitting the data at least once to the printer engine for the time corresponding to the predetermined number of the clock. As a result, the problem caused by the difference of DPI between data and the printer engine is eliminated in order to ensure the high quality of an image, such as when printed by a laser printer using the same DPI.

Laser printer capable of and method for printing rasterized data of high image quality

A method and a device for supplying a developing bias voltage capable of minimizing toner consumption by reducing wasted toner during a printing operation in the image forming apparatus. The image forming apparatus comprises a photosensitive drum for forming an electrostatic latent image, a charger for providing a predetermined charging voltage to the photosensitive drum such that different bias voltages are supplied to image and non-image areas, an exposure unit for forming the electrostatic latent image on the photosensitive drum by providing image data, a developing unit for developing the electrostatic latent image formed on the photosensitive drum by toner, a transfer unit for transferring the developed toner to a printing paper, and a developing bias controller.

Method and device for supplying a variable bias voltage to a developing

A power-saving printing method that wakes up an image-forming device prior to a print operation in order to reduce an extended print time resulting from a warm-up period of the device. One embodiment of the method includes the steps of: establishing a power-saving mode when the image-forming device has not received a print code for a predetermined period of time, determining whether a wake-up control code is included in a received print code, performing a wake-up operation and establishing a print ready state when the warm-up control code is included, and performing an operation corresponding to the received print code after the wake-up operation is performed when the wake-up control code is not included.

Power-saving printing method of a printing system

A printing control apparatus compatible with printing systems of a laser scanning unit type and a light emitting diode type contemplates a synchronizing signal supplying circuit which receives at least one signal out of a light emitting diode horizontal synchronizing signal generated when a period of a horizontal synchronizing signal of a light emitting diode type coincides with a given counting period and a beam detecting signal, and supplying a horizontal synchronizing signal corresponding to a printing system in response to a synchronizing select signal. A clock generating circuit generates a reference clock necessary for the generation of a plurality of signals and generates a video clock from the reference clock in response to the horizontal synchronizing signal and a latch driving signal from the reference clock. A latch signal generator generates a data latch signal having a given period from the reference clock in response to the latch driving signal. A strobe signal generator generates strobe signals to emit a light emitting diode array. A data output circuit generates video data to be printed according to a mode select signal. A control signal generator provides the synchronizing select signal to the synchronizing signal supplying circuit by latching an external control signal, provides the mode select signal to the data output circuit, and provides a laser diode control signal and a laser scanning unit motor control signal to the laser scanning unit.

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Seoul, South Korea

Duk-Soo Kim