Abstract: An apparatus to generate a high voltage includes a switching part to control a voltage induced in a secondary coil of a power transforming part, by interrupting a current in a primary coil of the power transforming part, a digital controlling part to control the interruption operation of the switching part according to supplied control data. The switching part, the digital interfacing part and the digital controlling part may be embodied in an ASIC chip (application-specific integrated circuit). An optimum control according to an output state of the apparatus is easily achieved, manufacturing time for tuning each parameter is reduced and heat generation in the apparatus is reduced.

Abstract: A method to selectively receive mail by an Internet mail apparatus includes receiving and storing mail header information of at least one mail. Mail header information is selected corresponding to a predetermined mail from the at least one mail. A mail transmission command is transmitted to an incoming mail server requesting transmission of the predetermined mail corresponding to the mail header information selected. The Internet mail apparatus, in response to the mail transmission command, receives the predetermined mail.

Abstract: An analog control application specific integrated circuit (ASIC) apparatus for a high voltage power supply (HVPS) in an image for apparatus, and a method for controlling the HVPS are provided. The HVPS includes a transformer transforming an AC signal to a high voltage signal and a voltage doubler outputting a DC high voltage for the HVPS. The ASIC includes an analog control circuit configured as a one-chip ASIC that converts a predetermined DC level signal to a high frequency switching signal using a switching component and outputs the converted high frequency switching signal to a primary winding of the transformer. If the high voltage output signal output from the voltage doubler is not feedbacked, the switching component high frequency switches a received driving signal of a gate driver, and outputs the high frequency switched signal to the transformer.

Abstract: An image printer uses a common filter to remove harmonic waves generated at a common operating frequency band of a fixing module to fix toner onto a print medium using high frequency power generated from a high frequency generator and a switch mode power supply module to supply operating power to the high frequency generator. The image printer includes a fixing module to fix toner to a print medium using high frequency power generated from a high frequency generator, a switch mode power supply module to supply operating power to the high frequency generator, and a band pass filter to filter harmonic waves of a common operating frequency band of the fixing module and the switch mode power supply module. The fixing module rectifies an input AC current supplied through the band pass filter to generate a high frequency current and fixes the toner to the print medium by generating heat using the generated high frequency current.

Abstract: A fusing apparatus in an image forming apparatus that heats a fusing unit by applying an induced current is provided. The flicker characteristics of the fusing apparatus are improved by gradually increasing the amount of induced current applied to the fusing unit for a predetermined amount of time so that the amount of induced current applied to the fusing unit is prevented from severely varying. The fusing apparatus comprises a fusing unit which is resistance-heated or induction-heated by applying an induced current and fuses toner onto paper using the heat. The fusing apparatus further comprises a pulse width modulation (PWM) signal generation unit which generates a PWM signal in response to the ON signal so that the amount of induced current input to the fusing unit gradually increases to a reference current.

Abstract: A fusing roller and a fusing apparatus using the same are provided. The fusing roller includes a coil unit resistance heated by a predetermined alternating current, and generating an alternating magnetic flux by the alternating current. A heating roller unit is heated by an induced current generated by the alternating magnetic flux. An adhering unit is formed of a non-magnetic material and is installed to contact the inside of the coil unit to elastically bias the coil unit toward the heating roller unit to adhere the coil unit onto the heating roller unit.

Abstract: A fusing roller and a fusing apparatus using the same are provided. The fusing roller includes a coil unit resistance heated by a predetermined alternating current, and an alternating magnetic flux is generated by the alternating current. A heating roller unit is heated by an induced current generated by the alternating magnetic flux. End caps are installed on both ends of the heating roller unit and have electrodes for receiving power from an external power source. Reduction units are formed on both ends of the coil unit to reduce contact resistance generated when the coil unit contacts the electrodes.

Abstract: A fixing device of an image forming apparatus includes a fixing roller rotatably mounted on a moving path of a printing medium having a toner image transferred thereon to fuse the toner image on the printing medium, a heater mounted in the fixing roller to generate a magnetic field by applied voltage, thus heating the fixing roller, and at least one magnetic core disposed around the fixing roller to concentrate, onto the fixing roller, the magnetic field generated by driving the heater. Accordingly, a density difference of the magnetic field generated by the heater is minimized by disposing the at least one magnetic core around the fixing rollers, thus enabling a uniform fixing temperature.

Abstract: A fusing roller and a fusing apparatus having the fusing roller are provided, wherein the fusing roller includes a coil unit, which generates resistive heat and an alternating magnetic flux in response to an alternating current input thereto, a heating roller unit, which generates an eddy current in response to the alternating magnetic flux and generates induced heat in response to the eddy current, and a contact unit, which is formed of a non-magnetic material in the fusing roller and which firmly contacts the coil unit with the heating roller unit.

Abstract: A fusing roller and a fusing apparatus having the fusing roller are provided. The fusing roller includes a roller unit and an induced heat generation unit that is installed on an outer circumferential surface of the roller unit. Eddy currents are generated in the roller unit in response to an alternating current input thereto. An insulation unit insulates the induced heat generation unit from the roller unit.

Abstract: A fusing device for fusing a predetermined toner image on paper, and which controls the heating range of a fusing unit by inputting an eddy current generated by a transformer to a terminal corresponding to the size of paper selected from a plurality of terminals of the fusing unit. The fusing device includes a power supply unit to which a predetermined alternating current is input and which generates an induced current in response to the input alternating current, a fusing unit being resistance-heated and induction-heated by the induced current and fusing the toner image on the paper using the generated heat, and a controller for controlling the induced current supplied to the fusing unit according to the size of the paper.

Abstract: A fusing roller and a fusing apparatus having the same are provided.

Abstract: A device for fusing a predetermined toner image on a paper and which electrically insulates a heating body of a fusing unit from a power supply unit by heating the heating body using an induced current generated by a transformer. The fusing device includes an insulation unit for generating an induced current in response to an alternating current, a heating body heated by the generated induced current, a toner fusing unit which fuses the toner image on the paper using the heat received from the heating body, and a tube-expansion adhesion portion closely adhering the heating body to the toner fusing unit using a predetermined tube-expansion pressure.

Abstract: Provided is a device for fusing a predetermined toner image on paper, and more particularly, to a device for heating a toner fusing unit by using resistance heating and induction heating simultaneously and fusing a toner image on paper using the heated toner fusing unit. The fusing device comprises an alternating current generator for generating a predetermined alternating current; a coil portion that is resistance-heated by the alternating current and generates an alternating magnetic flux by the alternating current; and a toner fusing unit for generating an eddy current by the alternating magnetic flux and that is induction-heated by the generated eddy current.

Abstract: A method to selectively receive mail by an Internet mail apparatus includes receiving and storing mail header information of at least one mail. Mail header information is selected corresponding to a predetermined mail from the at least one mail. A mail transmission command is transmitted to an incoming mail server requesting transmission of the predetermined mail corresponding to the mail header information selected. The Internet mail apparatus, in response to the mail transmission command, receives the predetermined mail.

Abstract: An e-mail printer having an authentication procedure includes an e-mail receiving unit that includes a storage device to store e-mail which is received in a predetermined memory area allocated to each user and an authentication device to authenticate the user so that the user accesses the storage device.

Abstract: A character agent resident on a user's computer facilitates interaction with the computer. The character agent provides character animation, text balloons, menus, and speech input/output. The character agent may operate based on locally stored supporting files, and may significantly extend its flexibility with supporting files retrieved dynamically, such as during Internet browsing. In this latter context, the character agent greatly extends the opportunity for interaction between various Internet sites and the user. A character server, which may be the web server, downloads a Character Action Markup Language (CAML) document and supporting animation files. These files specify the animation and behavior of the character agent. A browser plug-in allows the character agent to respond to browser events according to the CAML document's instructions.

Abstract: A line interface circuit having a dialer, a line interface unit and a DC masking circuit is adapted to execute an operation in either an emergency mode or a power-on mode. The line interface circuit unifies a voice processing part and an image processing part. The line interface circuit includes a single dialer, a communication port coupled to a non-voice terminal, and a line interface control unit for receiving dial information from a key matrix input at the non-voice terminal via the communication port in a power-on state of the non-voice terminal. The line interface control unit derives DC power converted from AC power supplied form a desired AC power supply, and transferring the dial information to the dialer. A method for controlling the line interface circuit is also provided to selectively couple a non-voice terminal and a voice terminal both equipped in a telephone communication system to a telephone line via the line interface circuit.

Abstract: A washing machine including an outer tub disposed within a body of the washing machine, a rotating wash tub disposed within the outer tub for being rotated to wash and spin-dry the laundry, and a pulsator disposed on an inner bottom floor of the rotating wash tub for alternatively rotating left and right, the washing machine having a plurality of ducts mounted on a periphery of the rotating wash tub for the washing water contained in between the outer tub and the rotating wash tub to be induced and ejected into the rotating wash tub when the rotating wash tub is rotated, such that the washing water disposed in between the rotating wash tub and the outer tub is ejected into the rotating wash tub via a duct during washing and rinsing processes, thereby enhancing washing and rinsing efficiency due to formation of new water current and its collision with laundry.

Abstract: A flat-panel display device using an optical waveguide includes a light source for emitting light, a plurality of optical waveguides into which light emitted from the light source is incident, an optical waveguide arrangement substrate on which the plurality of optical waveguides are arranges and made of a material having a low refractive index so as to totally reflect the light transmitted through the plurality of optical waveguides, a light output controller positioned on the plurality of optical waveguides and made of a material whose refractive index changes according to an electric field, a light output portion positioned on the light output controller, for refracting the light having passed through the light output controller when the light propagated through the plurality of optical waveguides due to the electric field is transmitted through the light output controller and is output therefrom, and outputting the same to the outside, a first electrode positioned on the light output portion, made of a tr