Abstract: An image forming apparatus may include an engine portion used to perform an image forming job, a step motor configured to start the engine portion, a driver including a resistor that measures current that flows to a coil of the step motor and is configured to provide a predetermined constant current to the step motor, and a drive controller configured to measure a load level of the step motor based on a voltage value of the resistor and to control the driver to provide the constant current that corresponds to the measured load level.

Abstract: An alarm turning off method and a mobile device adapted to the method are provided. The method includes reproducing a preset alarm audio sound and outputting a preset beat at a preset alarm time, determining whether the mobile device receives an input beat, when the mobile device has received the input beat, muting the reproduced alarm audio sound, determining whether the preset beat is identical to the input beat in a state where the alarm audio sound is muted, and turning off the alarm when the number of occurrences where the preset beat matches the input beat is a preset number in a state where the alarm audio sound is muted.

Abstract: An image forming apparatus, a control method for the same, and a motor state detector are provided. An aspect is to detect out-of-step of a motor using only an electric circuit configuration without additional mechanical devices, such as an encoder, a light-emitting device, and a light-receiving device, and to predict and prevent out-of-step of the motor. To this end, the image forming apparatus includes a motor state detector that acquires a current detection signal by detecting phase current of a motor and that generates an output signal in which a duty ratio in a current chopping section of the current detection signal is involved, and a controller that judges a normal state, out-of-step entry, and an out-of-step state of the motor based on the output signal of the motor state detector.

Abstract: An image forming apparatus includes an engine unit to perform an image forming job; an engine control unit to control the operation of the engine unit; a brushless direct current (BLDC) motor to drive the engine unit; a sensor unit to sense electric angle information and driving velocity information of the BLDC motor; a communication interface to receive a digital control command with respect to the BLDC motor from the engine control unit; a driving signal unit to generate a driving signal to control the BLDC motor; and a digital control unit to control the operation of the driving signal unit in a digital phase locked loop (PLL) manner for feedback controls the BLDC motor, based on the received digital control command, the detected electric angle information and the driving velocity information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: An image forming apparatus includes an engine unit used for performing an image forming job, an engine control unit which controls the operation of the engine unit, a brushless direct current (BLDC) motor which drives the engine unit, a sensor unit which senses the driving information of the BLDC motor, a communication interface unit which receives a digital control command with respect to the BLDC motor from the engine control unit, a driving signal unit which generates a driving signal to control the BLDC motor, and a digital control unit which controls the operation of the driving signal unit in a digital PLL manner, based on the received digital control command, the detected driving information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: An image forming apparatus and a color registration method thereof. The color registration method includes checking a change in a status of an image forming apparatus, selecting color registration patterns having a different length according to the status change, and performing color registration by printing the color registration patterns having the different length onto a transfer belt.

Abstract: A method and a system of managing information security for a mobile device in a restricted area based on location information regarding the mobile device are provided. The method includes receiving, by the mobile device, a request for the execution of an application program in a restricted area from a server managing the restricted area, executing, by the mobile device, the application program requested for execution when the program was set to be executable according to a security policy set to the restricted area, encrypting, by the mobile device, a file, created according to the execution of the application program, based on location information regarding the mobile device, and storing the encrypted file.

Abstract: A method of providing information of a mobile communication terminal, and a mobile communication terminal for performing the method, are provided. The method includes determining whether a search command event has been generated during a call with a counterpart terminal, converting a voice signal received from a microphone into a text when the generation of search command event is determined to have been generated, identifying information matching the text in a memory, and sending the information to the counterpart terminal.

Abstract: An image forming apparatus and an auto color registration method thereof. The image forming apparatus performs an auto color registration (ACR) operation by excluding or minimizing the influence caused by variation in speed of a drive unit driving a transfer member. The image forming apparatus includes a controller, which prints a test pattern of each color according to a rotation period of the drive unit, and controls an operation for outputting an image in which each color registration error is corrected on the basis of the test pattern, such that a reliability of the ACR operation is increased and a quality of an image output from the image forming apparatus is also increased.

Abstract: An alarm turning off method and a mobile device adapted to the method are provided. The method includes reproducing a preset alarm audio sound and outputting a preset beat at a preset alarm time, determining whether the mobile device receives an input beat, when the mobile device has received the input beat, muting the reproduced alarm audio sound, determining whether the preset beat is identical to the input beat in a state where the alarm audio sound is muted, and turning off the alarm when the number of occurrences where the preset beat matches the input beat is a preset number in a state where the alarm audio sound is muted.

Abstract: A method and system for sharing digital content are provided. The method includes creating, by a first user, a purchase request message containing a content ID of digital content to be purchased, and transmitting the purchase request message to a content providing server, transmitting, by the content providing server, requested content to the first user, and transmitting content meta data containing a user ID of the first user and the content ID to an integrated management server, storing, the first user, the received content, and examining, by the integrated management server that manages content lists for individual users, the content meta data, adding the purchased content to an integrated content list of the first user, and displaying the integrated content list.

Abstract: An image forming apparatus includes an engine unit used for performing an image forming job, an engine control unit which controls the operation of the engine unit, a brushless direct current (BLDC) motor which drives the engine unit, a sensor unit which senses the driving information of the BLDC motor, a communication interface unit which receives a digital control command with respect to the BLDC motor from the engine control unit, a driving signal unit which generates a driving signal to control the BLDC motor, and a digital control unit which controls the operation of the driving signal unit in a digital PLL manner, based on the received digital control command, the detected driving information and a digital gain value as a control factor with respect to the BLDC motor.

Abstract: An apparatus and method for searching for an improved radio broadcast in a portable terminal are provided. The apparatus includes a radio function performance unit. If an input for a radio broadcast channel search is detected while listening to a radio broadcast, the radio function performance unit changes from an original previously listened radio broadcast to a radio broadcast corresponding to the detected input. If the input for the radio broadcast channel search is released, the radio broadcast channel is restored to the original previously listened radio broadcast channel.

Abstract: A method and apparatus for detecting a cover opening of an image forming apparatus and a method and apparatus for controlling the supply of power to the image forming apparatus by detecting cover opening are provided. A detection is made as to whether first and second covers for the image forming apparatus are both closed. A verification is made as to whether memory information of a predetermined memory placed in the first cover is detected, if at least any one of the first and second covers is open. A determination is made that the second cover is open, if the memory information is detected. Accordingly, a user can know which cover is open among covers provided in the image forming apparatus by using one switching element. In addition, since a circuit used for detecting cover opening can be implemented with low cost, maintenance of the circuit can be promptly carried out.

Abstract: Disclosed herein are an image forming apparatus and a color registration method thereof. The color registration method includes checking a change in a status of an image forming apparatus, selecting color registration patterns having a different length according to the status change, and performing color registration by printing the color registration patterns having the different length onto a transfer belt.

Abstract: An image forming apparatus and an auto color registration method thereof. The image forming apparatus performs an auto color registration (ACR) operation by excluding or minimizing the influence caused by variation in speed of a drive unit driving a transfer member. The image forming apparatus includes a controller, which prints a test pattern of each color according to a rotation period of the drive unit, and controls an operation for outputting an image in which each color registration error is corrected on the basis of the test pattern, such that a reliability of the ACR operation is increased and a quality of an image output from the image forming apparatus is also increased.

Abstract: A method and apparatus for detecting a cover opening of an image forming apparatus and a method and apparatus for controlling the supply of power to the image forming apparatus by detecting cover opening are provided. A detection is made as to whether first and second covers for the image forming apparatus are both closed. A verification is made as to whether memory information of a predetermined memory placed in the first cover is detected, if at least any one of the first and second covers is open. A determination is made that the second cover is open, if the memory information is detected. Accordingly, a user can know which cover is open among covers provided in the image forming apparatus by using one switching element. In addition, since a circuit used for detecting cover opening can be implemented with low cost, maintenance of the circuit can be promptly carried out.