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| 20090157815 | MOBILE DEVICE FOR PROVIDING BLOG SERVICE AND METHOD FOR PROVIDING BLOG SERVICE USING THE SAME - A mobile device for providing a blog service and a method and system for providing the blog service. The mobile device that operates as a blog providing server includes: a unit for obtaining raw data; a storage unit storing the raw data and blog information; and a blog editor generating/editing a blog page by using the raw data and the blog information. | 06-18-2009 |
| 20090198763 | METHOD AND SYSTEM FOR PROVIDING BLOG SERVICE BY USING MOBILE TERMINAL, AND MOBILE BLOG CASTER THEREFOR - A method and system to provide a blog by using a mobile terminal, and a mobile blog (MB) caster therefor, the method including: receiving blog data including one or more pieces of downsized data from an MB caster; selecting a piece of downsized data from among the one or more pieces of downsized data; obtaining metadata corresponding to the selected piece of downsized data; accessing a web blog server; and downloading original data corresponding to the metadata from the web blog server. Since the blog is created and provided by using the downsized data, instead of the original data, a blog server operation can be realized by using only existing mobile devices. Furthermore, the mobile terminal does not have to be connected to the Internet (or the web blog server) for a blog service. Also, it is possible to provide the blog at very high speed. | 08-06-2009 |
| 20090309900 | METHOD AND APPARATUS FOR DISPLAYING MAP USING NON-LINEAR COMPRESSION - A map displaying method and apparatus to display a map on a screen, the map displaying method including: establishing a first area on the map that is not compressed based on a current location of an object on the map; non-linearly compressing a second area adjacent to the first area at different compression ratios according to a distance from the first area to generate a third area; and displaying the first area and the third area on the screen. | 12-17-2009 |
| 20090326812 | METHOD AND APPARATUS FOR DISPLAYING MAP BASED ON DIRECTION OF COURSE - A map displaying apparatus and method thereof, the map displaying method including: determining a course direction of an object at a current position of a map; moving a first center of a first area of the map, displayed on a screen, that is set based on the current position, by a predetermined distance in the course direction so as to determine a second center; and displaying a second area of the map on the screen having the second center as a center thereof. | 12-31-2009 |
| 20100033428 | CURSOR MOVING METHOD AND APPARATUS FOR PORTABLE TERMINAL - A cursor moving method and apparatus for portable terminals is provided, by which a user is able to point to a specific location on a screen of the portable terminal by using one hand. The cursor moving method includes the operations of sensing a spatial motion of the portable terminal by using a motion sensor, extracting a direction and distance of the movement of the portable terminal from a result output from the motion sensor, and moving the cursor on a screen of the portable terminal, according to the direction and distance of the movement. | 02-11-2010 |
| 20110055538 | METHOD AND APPARATUS FOR CONTROLLING OPERATION OF BOOTING VIDEO IMAGE REPRODUCING APPARATUS - A method of controlling an operation of booting an image reproducing apparatus is provided. The method includes: receiving an input signal for powering off the image reproducing apparatus; receiving from a main processor a memory address where an operation status of the image reproducing apparatus is stored, according to the received input signal; storing the received memory address; and converting a system of the image reproducing apparatus into a sleep by the sub-processor. | 03-03-2011 |
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| 20090047050 | IMAGE FORMING APPARATUS - An image forming apparatus includes a housing, a photosensitive body mounted in the housing to form a visible image, a transfer unit mounted to an inner front portion of the housing to transfer the visible image of the photosensitive body onto a printing medium, a fusing unit mounted in a downstream side from the transfer unit in a printing medium feeding path to fuse the visible image to the printing medium, and a reverse unit mounted in a downstream side from the fusing unit in the printing medium feeding path to reverse the printing medium having passed through the fusing unit. Accordingly, a moving direction of the printed printing medium is reversed by the reverse unit so that the printing medium can be discharged while a printed surface of the printing medium is directed downward, thereby easily drawing out the printing medium without additionally arranging the printed pages in a correct order. | 02-19-2009 |
| 20110170143 | Method and apparatus for controlling color registration sensors - A method and apparatus for controlling registration sensors are provided, in which a transfer unit transfers an electrostatic latent image onto a printing medium, at least one registration sensor senses image alignment errors by irradiating light to the transfer unit to sense reflected light, a sensor data storage unit stores characteristics data of the respective registration sensors, and a sensor control unit controls the registration sensors based on the characteristics data of the respective registration sensors, wherein the registration sensors are placed into the transfer unit. Accordingly, time for performing an algorithm of color registration can be reduced, and registration can be achieved correctly in a short time, irrespective of a set frame of the image forming apparatus. | 07-14-2011 |
| 20120026527 | IMAGE FORMING APPARATUS - Disclosed is an image forming apparatus. The image forming apparatus includes a housing having a discharge port, a plurality of photosensitive bodies mounted in the housing, a transfer unit to transfer visible images formed on the plurality of photosensitive bodies onto a printing medium, a fusing unit to fuse transferred visible images to the printing medium, and a reverse unit to reverse a moving direction of the printing medium, after the printing medium has passed through the fusing unit. As the moving direction of the printed printing medium is reversed by the reverse unit, the printing medium may be discharged while a printed surface of the printing medium is directed downward, allowing a user to easily draw out the printing medium. | 02-02-2012 |
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| 20080247330 | METHOD AND APPARATUS FOR SELECTING ANTENNA IN A COMMUNICATION SYSTEM - A method and apparatus for selecting an antenna in a communication system is provided. The apparatus includes a mobile station for determining a set of transmit antennas by considering statistical channel information, for determining a subset of the transmit antennas, which can increase a diversity gain and reduce an effect of a spatial correlation, from among the determined set of the transmit antennas by considering the statistical channel information and instantaneous channel information, for generating antenna selection information by using the determined subset of the transmit antennas, and for feeding back the generated antenna selection information to a base station. | 10-09-2008 |
| 20090010349 | APPARATUS AND METHOD FOR GENERATING EFFECTIVE SIGNAL TO NOISE RATIO PER STREAM IN A MULTIPLE INPUT MULTIPLE OUPUT WIRELESS COMMUNICATION SYSTEM - An apparatus and method for generating an effective Signal to Noise Ratio (SNR) per stream in a Multiple Input Multiple Output (MIMO) wireless communication system is disclosed. The apparatus includes a selector, a calculator, a generator, and a decider. The selector selects effective streams among whole streams. The calculator calculates a relative SNR rate between the effective streams. The generator generates an equation having as a solution an SNR of a first effective stream. The decider decides an SNR per effective stream using the solution of the equation and the relative SNR rate. | 01-08-2009 |
| 20090010359 | APPARATUS AND METHOD FOR INTERFERENCE CANCELLATION IN MULTI-ANTENNA SYSTEM - An apparatus and a method for interference cancellation in a transmitting end of a multi-antenna system are provided. A precode is generated which maximizes a diversity gain of one or more receive antennas using channel information of the receive antennas to be serviced. Transmit powers of the receive antennas are updated by taking into account a power loss and a shaping loss according to a dirty paper coding. Transmit signals are precoded by updating the precode according to the updated transmit powers. The dirty paper coding is performed on the precoded transmit signals to be transmitted to the receive antennas. | 01-08-2009 |
| 20090022251 | MAXIMUM LIKELIHOOD DETECTION APPARATUS AND METHOD IN A WIRELESS COMMUNICATION SYSTEM - A Maximum Likelihood (ML) detection apparatus and method in a wireless communication system are provided, in which a Euclidean distance are calculated using at least one of channel matrix information, noise power information and modulation order information of each stream, Pairwise Error Rate (PER) are calculated using the Euclidean distance, an error probability of the each stream is calculated using the PER, the error probability of the each stream is ordered and sorted, and ML detection is performed using a result of the ordering and sorting. | 01-22-2009 |
| 20090036183 | APPARATUS AND METHOD FOR SUPPORTING MULTIPLE ANTENNA SERVICE IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for supporting a multiple antenna service in a wireless communication system are provided. The apparatus includes at least one antenna, a form determining unit for determining a form of an MS, and an antenna constructing unit for constructing an antenna structure according to the form of the MS using the at least one antenna. | 02-05-2009 |
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| 20100296594 | APPARATUS AND METHOD FOR INITIAL SYNCHRONIZATION IN WIRELESS COMMUNICATION SYSTEM BASED ON OFDM - An apparatus and a method for acquiring initial synchronization in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM) are provided. The apparatus includes a frame synchronizer for acquiring frame synchronization using a preamble signal, a first offset determiner for determining a first time offset and a first frequency offset based on the frame synchronization, a preamble identifier estimator for estimating a preamble identifier in a receive signal interpolated with the first time offset and the first frequency offset, and a second offset determiner for generating a first preamble signal and a first pilot signal corresponding to the preamble identifier, for derandomizing a preamble signal and a pilot signal, and for determining a second time offset and a second frequency offset. Thus, the initial synchronization acquisition time in a low Signal-to-Noise Ratio (SNR) environment can be reduced. | 11-25-2010 |
| 20110188388 | User equipment scheduling method in cellular uplink communication system and base station apparatus therefor - A method and an apparatus maximize the capacity of a wireless communication network by taking into consideration inter-cell interference coordination. A home cell's capacity sensitivity to interference is calculated. At least one neighbor cell's capacity sensitivity to interference is collected. And at least one UE located in the home cell is scheduled based on the home cell's capacity sensitivity and the neighbor cell's capacity sensitivity. Accordingly, it is possible to achieve power and allocation control to maximize the capacity of the overall network including neighbor cells increase the system capacity in a cellular system in which inter-cell interference is large, and adaptively perform a UE scheduling in real time to changing distribution of UEs because information on a change in the capacity of each cell is shared by periods. | 08-04-2011 |
| 20120009969 | APPARATUS AND METHOD FOR CONTROLLING UPLINK TRANSMISSION POWER IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for controlling uplink transmission power in a mobile communication system are provided. In the method, an Advanced Mobile Station (AMS) determines uplink transmission power based on a measured path loss, an uplink noise and interference level received from an Advanced Base Station (ABS), a target Signal-to-Noise and Interference Ratio (SINR), and an offset. An initial offset value is determined based on a number of retransmissions of an initial ranging code performed until an initial ranging process is completed, a transmission power unit used for retransmission of the initial ranging code, and a power correction value received from the ABS upon completion of the initial ranging process with the ABS. | 01-12-2012 |
| 20120026910 | SCHEDULING METHOD AND APPARATUS FOR CONTROL AVERAGE TRANSMISSION RATE IN MULTIPLE ANTENNA SYSTEM - A scheduling method in a wireless communication includes receiving a Channel Quality Indicator (CQI) from a plurality of terminals. The method also includes determining an average transmission rate of each terminal based on the CQI by approximating an instantaneous transmission rate distribution to a Gaussian distribution. The method further includes determining a weight of each terminal such that the average transmission rate of each terminal satisfies a target transmission rate. The method also includes selecting a terminal set by applying the determined weight. Thus, it is possible to control the fairness between the terminals and to efficiently control the transmission rate of the terminals according to the required transmission rate and the channel environment of the terminals. | 02-02-2012 |
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| 20090297768 | Mask assembly and method of fabricating the same - In a mask assembly and a method of fabricating the same, when the mask assembly is fabricated by tensile welding a pattern mask to a mask frame, a tensile welding portion of the pattern mask welded to the mask frame is structurally changed. Thus, the pattern mask can be easily welded to the mask frame, and patterns of the pattern mask can be precisely aligned, thereby minimizing stain failure rate due to the mask assembly. The mask assembly includes: a mask frame including an opening and a support; and a pattern mask including a pattern portion having a plurality of patterns arranged in a matrix and a plurality of tensile welding portions extending from the pattern portion in a first direction and spaced apart from each other in a second direction perpendicular to the first direction. The method includes: providing a mask frame, a support, and a pattern mask as described above; disposing the pattern mask and the mask frame in a unique manner; combining the pattern mask with the mask frame by welding; measuring an aligned state of the pattern arranged in the first direction of the pattern mask; and welding a tensile welding portion using a secondary welding process according to an aligned state. | 12-03-2009 |
| 20100033084 | ORGANIC ELECTROLUMINESCENCE DISPLAY INCLUDING A SPACER AND METHOD FOR FABRICATING THE SAME - Embodiments of the present disclosure provide an organic electroluminescence display device. The display device may include a set of multi-directional spacers that are interposed between the pixels of the display. In one embodiment, the spacers are positioned in both lengthwise and crosswise directions. In another embodiment, the spacers include a first portion that is extends lengthwise between pixels and one or more portions that extend laterally from the first portion between pixels. In yet another embodiment, the spacers include portions that extend in multiple directions between pixels. The spacers may substantially surround each of the pixels and may serve as a boundary, for example, that prevents organic material for one pixel from being incorrectly deposited in another pixel. The spacers can be configured as a support structure, such as, for a metal mask during fabrication of the display device. In addition, the multi-directional aspect of the spacers may be useful in protecting the pixels from damage, such as, when a metal mask is moved during mounting or during fabrication of the display device. | 02-11-2010 |
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| 20110006826 | PHASE SIGNAL GENERATING APPARATUSES - In at least one example embodiment, a phase signal generating apparatus includes a phase signal generator and phase controller. The phase signal generator is configured to receive a plurality of first phase signals and a plurality of second phase signals, adjust a phase difference between the plurality of first phase signals and the plurality of second phase signals and generate a plurality of adjusted first phase signals and a plurality of adjusted second phase signals, based on a switch control signal and a phase control signal, a phase difference between the plurality of adjusted first phase signals and the plurality of adjusted second phase signals being the adjusted phase difference. The phase controller is configured to generate the switch control signal and the phase control signal based on phase information for the plurality of first phase signals and the plurality of second phase signals. | 01-13-2011 |
| 20110188601 | APPARATUS FOR GENERATING FREQUENCY SIGNAL - A frequency signal generator includes a controller for generating a frequency generation signal, a reference frequency signal generator for generating a first frequency signal and generate a second frequency signal by dividing a first frequency signal from the controller, an assistance frequency signal generator adapted to generate a third, fourth, and fifth frequency signals and to output a sixth frequency signal in response to an assistance frequency select signal, a mixer for selecting a sign of the sixth frequency signal in response to a sign select signal and generating a seventh frequency signal and a eighth frequency signal by mixing the sixth frequency signal of the selected sign and the first frequency signal, a switch adapted to output the seventh or eighth frequency signal in response to a dividing select signal, and a first divider outputting a ninth frequency signal by dividing the eighth frequency signal from the switch. | 08-04-2011 |
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| 20100128820 | QUADRATURE SIGNAL PHASE CONTROLLER FOR CONTROLLING PHASE - A quadrature signal phase controller includes a first phase shifter and a second phase shifter. The first phase shifter generates phase shifted first in-phase differential output signals and phase shifted first quadrature-phase differential output signals. The second phase shifter generates phase shifted second in-phase differential output signals and phase shifted second quadrature-phase differential output signals. Each of the first and second phase shifters increases or decreases the phase difference between the first in-phase differential output signals and the second quadrature-phase differential output signals, and the phase difference between the second in-phase differential output signals and the first quadrature-phase differential output signals, in response to a change in a level of the first control signal and a change in a level of the second control signal. | 05-27-2010 |
| 20100225361 | FREQUENCY DIVIDER, FREQUENCY SYNTHESIZER AND APPLICATION CIRCUIT - A frequency divider includes a prescaler and multiple modulus dividers commonly coupled to the prescaler. The prescaler generates intermediate frequency signals having a same phase difference with respect to one another in response to an oscillation frequency signal. The prescaler operates at a first frequency. The modulus dividers respectively divide the intermediate frequency signals with respective ratio to provide a plurality of division frequency signals in response to a control signal. The modulus dividers operate at a second frequency less than the first frequency. | 09-09-2010 |
| 20100329388 | FREQUENCY SYNTHESIZER AND POLAR TRANSMITTER HAVING THE SAME - A frequency synthesizer includes a distributed phase detector circuit, a multiple charge pump, a loop filter, a voltage-controlled oscillator and a dividing circuit. The distributed phase detector circuit delays an up signal and a down signal to generate a delayed up signal and a delayed down signal. The multiple charge pump generates a distributed current signal including a plurality of current pulse signals. Each of the current pulse signal is based on each bit of the delayed up signal and the delayed down signal. The loop filter filters the distributed current signal to generate a control voltage. The voltage-controlled oscillator generates an oscillation frequency signal based on the control voltage. The dividing circuit divides the oscillation frequency signal to generate a plurality of division frequency signals in response to a plurality of control signals, where the frequency signals are fedback to the distributed phase detector circuit. | 12-30-2010 |
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| 20080266942 | Multiple level cell phase-change memory device having pre-reading operation resistance drift recovery, memory systems employing such devices and methods of reading memory devices - A memory device comprises a plurality of memory cells, each memory cell comprising a memory cell material that has an initial resistance that is determined in response to an applied programming current in a programming operation, the resistance of the memory cell varying from the initial resistance over a time period following the programming operation, and each memory cell being connected to a conduction line of the memory device that is used to apply the programming current to program the resistance of the corresponding memory cell in the programming operation and that is used to apply a read current to read the resistance of the corresponding memory cell in a read operation. A modification circuit modifies the resistance of a memory cell of the plurality of memory cells selected for a read operation to return its resistance to near the initial resistance prior to a read operation of the memory cell. | 10-30-2008 |
| 20080316804 | Multiple level cell phase-change memory devices having controlled resistance drift parameter, memory systems employing such devices and methods of reading memory devices - In a method of controlling resistance drift in a memory cell of a resistance-changeable material memory device, the resistance changeable material in the memory cell is treated so that a drift parameter for the memory cell is less than about 0.18, wherein a change in resistance of a memory cell over the time period is determined according to the relationship: | 12-25-2008 |
| 20090016099 | Multiple level cell phase-change memory devices having post-programming operation resistance drift saturation, memory systems employing such devices and methods of reading memory devices - In a memory device and in a method of programming the same, a memory device comprises: a plurality of memory cells, each memory cell comprising a resistance-changeable material that has an initial resistance that is determined in response to an applied programming current in a programming operation; and a modification circuit that modifies the resistance of the memory cell following a programming operation of the memory cell to vary the resistance of the memory cell from the initial resistance to a second resistance by applying a saturation current in a saturation operation. Each memory cell is connected to a conduction line of the memory device that is used to apply the programming current to program the resistance of the corresponding memory cell in the programming operation, that is used to apply the saturation current to the corresponding memory cell in the saturation operation and that is used to apply a read current to read the resistance of the corresponding memory cell in a subsequent read operation. | 01-15-2009 |
| 20090026436 | Phase change memory devices and methods of forming the same - A method of forming a phase change memory device includes forming a core pattern on a substrate, conformally forming a heat conductive layer on the substrate including the core pattern, anisotropically etching the heat conductive layer down to a top surface of the core pattern to form a heat electrode surrounding a sidewall of the core pattern, and forming a phase change memory pattern connected to a top surface of the heat electrode. | 01-29-2009 |
| 20090242866 | Phase change memory device and method of fabricating the same - A semiconductor device includes an insulating layer on a substrate, a first electrode in the insulating layer having a first upper surface and a second upper surface, a second electrode in the insulating layer spaced apart from the first electrode by a first distance and having a third upper surface and a fourth upper surface, the third upper surface being disposed at a substantially same level as the first upper surface, and the fourth upper surface being disposed at a substantially same level as the second upper surface, a first phase change material pattern covering a part of the first upper surface of the first electrode, and a second phase change material pattern covering a part of the third upper surface of the second electrode, wherein an interface region between the second phase change pattern and the second electrode is spaced apart from an interface region between the first phase change pattern and the first electrode by a second distance greater than the first distance. | 10-01-2009 |
| 20110188304 | MULTIPLE LEVEL CELL PHASE-CHANGE MEMORY DEVICES HAVING PRE-READING OPERATION RESISTANCE DRIFT RECOVERY, MEMORY SYSTEMS EMPLOYING SUCH DEVICES AND METHODS OF READING MEMORY DEVICES - A memory device comprises a plurality of memory cells, each memory cell comprising a memory cell material that has an initial resistance that is determined in response to an applied programming current in a programming operation, the resistance of the memory cell varying from the initial resistance over a time period following the programming operation, and each memory cell being connected to a conduction line of the memory device that is used to apply the programming current to program the resistance of the corresponding memory cell in the programming operation and that is used to apply a read current to read the resistance of the corresponding memory cell in a read operation. A modification circuit modifies the resistance of a memory cell of the plurality of memory cells selected for a read operation to return its resistance to near the initial resistance prior to a read operation of the memory cell. | 08-04-2011 |
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| 20090090899 | Phase change memory device and method of manufacturing the same - A method of manufacturing a phase change memory device includes forming at least one active device on a substrate, forming a bottom electrode electrically connected to the at least one active device, forming a phase change material layer and a top electrode on the bottom electrode, forming a capping layer on an upper surface of the top electrode and on side surfaces of the top electrode and phase change material layer, removing a portion of the capping layer overlapping the upper surface of the top electrode to define capping layer sidewall portions, forming an interlayer insulation film on the capping layer sidewall portions and on the top electrode, removing a portion of the interlayer insulation film from the top electrode to form a contact hole through the interlayer insulation film, and forming a contact plug in the contact hole. | 04-09-2009 |
| 20100072446 | Phase-change semiconductor device and methods of manufacturing the same - In a phase-change semiconductor device and methods of manufacturing the same, an example method may include forming a metal layer pattern on a substrate, the metal layer pattern including an opening that exposes a portion of the substrate, forming an etch stop layer on the metal layer pattern, a sidewall of the opening and the exposed portion of the substrate, the etch stop layer formed with a thickness less than an upper thickness threshold, and reducing at least a portion of the etch stop layer, the reduced portion of the etch stop layer forming an electrical connection with the substrate. | 03-25-2010 |
| 20100096681 | Cell structure for a semiconductor memory device and method of fabricating the same | 04-22-2010 |
| 20100147799 | CHEMICAL MECHANICAL POLISHING METHOD - In an embodiment, a chemical mechanical polishing method for a substrate having a first layer and a stepped portion. A surface of the first layer is positioned above an upper face of the stepped portion. A polishing process for selectively removing the stepped portion is performed on the first layer by using a first slurry composition that has a self-stopping characteristic so that the first layer is changed into a second layer having a substantially flat surface. A second polishing process is performed using a second slurry composition that does not have the self-stopping characteristic, until the upper face of the stepped portion is exposed. | 06-17-2010 |
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| 20110013955 | HEATING MEMBER HAVING RESISTIVE HEATING LAYER AND FUSING DEVICE USING THE SAME - Disclosed are a heating member having a resistive heating layer and a fusing device using the heating member. The heating member includes the resistive heating layer on an outer circumferential surface of a load support member. Electricity is supplied to an inner circumferential surface and an outer circumferential surface of the resistive heating layer in a direction perpendicular to the resistive heating layer. | 01-20-2011 |
| 20110107779 | Frost detecting apparatus, and cooling system and refrigerator having the same - A frost detecting apparatus including a first electrode to generate an electric field in a frost detection region, a second electrode to prevent the electric field from leaking into a frost non-detection region, an insulator arranged between the first electrode and the second electrode, to insulate the first electrode, and a shield arranged around an exposed portion of the insulator, to prevent the electric field from leaking into the frost non-detection region through the exposed portion of the insulator. As the same potential is established at the first and second electrodes, it is possible to prevent electric field from leaking into a frost non-detection region through side surfaces of the first electrode. Accordingly, the electric field is varied only by frost formed in a frost detection region, so that it is possible to more accurately detect formation of frost and the amount of the formed frost. | 05-12-2011 |
| 20110185755 | Cooling apparatus and frost detecting method thereof - A cooling apparatus including a frost sensor to sense frost, a multiplexer having a first input terminal, to which the frost sensor is connected, and a second input terminal as a non-connected input terminal, a signal processor to subtract a signal input through the second input terminal from a signal input through the first input terminal, and to output a signal obtained by the subtraction, and a controller to detect an amount of frost sensed by the frost sensor, based on the output signal from the signal processor. It is possible to easily and accurately determine noise contained in a signal received from the frost sensor by determining, as noise, the signal received from the input terminal, to which the frost sensor is not connected, and subtracting the noise from the signal received from each input terminal, to which the frost sensor is connected. | 08-04-2011 |
| 20120055181 | Cooling system and defrosting control method thereof - A cooling system including an evaporator to exchange heat with air, a frost detector installed on the evaporator to detect frost, and a control unit to determine whether a current time corresponds to a frost detection point, to control the frost detector to operate when the current time corresponds to the frost detection point, and to control a defrosting operation based on a frost detection signal from the frost detector. It is possible to accurately detect the amount of frost formed on the evaporator by executing the frost detection under constant frost detection environmental conditions. | 03-08-2012 |
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| 20100092217 | TRANSFERRING UNIT AND IMAGE FORMING APPARATUS INCLUDING THE SAME - Disclosed are a transfer unit and an image forming apparatus having the same. The apparatus can include multiple members configured to carry developer associated with color images. The transfer unit can include multiple rollers each disposed to opposingly face a respective corresponding one of the members, a belt interposed between the rollers and the members, and a device configured to support the rollers. The rollers can include a first roller at one end of the transfer unit, a second roller at an opposite end and one or more middle rollers arranged between the first and second rollers. The device can be configured such that a rotation center of the first roller and a rotation center of the second roller define a first plane and a rotation center of the one or more middle rollers defines a second plane parallel to but not co-planar with the first plane. | 04-15-2010 |
| 20110091251 | HEATING ROLLER HAVING RESISTIVE HEATING ELEMENT AND FUSING DEVICE INCLUDING HEATING ROLLER - A heating roller including a resistive heating layer and a fusing device including the heating roller. By separately disposing a plurality of electrodes in an axis direction of the heating roller, and by independently controlling each electrode, the heating roller may correspond to various papers having different sizes. Accordingly, the temperature of the heating roller may be stably controlled. | 04-21-2011 |
| 20110280601 | Apparatus and method to control temperature of heating roller used in fusing device of image forming apparatus - The apparatus includes a heating roller that generates heat for melting toner attached to a printing medium; a first induction coil that is disposed outside the heating roller and heats the heating roller by using induced current generated according to current flowing through the first induction coil; two second induction coils that are disposed at upper portions of both ends of the first induction coil and heat the heating roller by using induced current generated according to current flowing through the two second induction coils; a power supply unit that supplies current to the first induction coil and the two second induction coils; and a control unit that controls the power supply unit to supply current flowing in the same direction or different directions to the first induction coil and the second induction coils according to the size of paper fed into the heating roller. | 11-17-2011 |
| 20110293338 | Induction heating type fusing device and image forming apparatus employing the same - An induction heating type fusing device and an image forming apparatus including the fusing device. The fusing device includes a magnetic flux generator and a compressing roller outside a fusing belt, first and second fusing rollers and a nip guide inside the fusing belt. The compressing roller compresses against the first and second fusing rollers and the nip guide to form nips, while the fusing belt is disposed between the compressing roller and the first and second fusing rollers and the nip guide. | 12-01-2011 |
