Patent application number | Description | Published |
20080204837 | METHOD OF AND APPARATUS FOR RECORDING/REPRODUCING DATA ON/FROM HOLOGRAPHIC STORAGE MEDIUM - A method of and apparatus for recording/reproducing data on/from a holographic storage medium. The method of recording data on a holographic storage medium in which holograms containing data by interference between a signal light and a reference light are recorded in pages includes modulating additional information including information about a page so as to keep the rate of 0s or 1s in binarized data of the additional information constant and recording the page having the modulated additional information added thereto on the holographic storage medium. | 08-28-2008 |
20080205238 | RECORDING/REPRODUCING METHOD, RECORDING/REPRODUCING APPARATUS AND HOLOGRAPHIC INFORMATION STORAGE MEDIUM - A recording/reproducing method and recording/reproducing apparatus, which use an information storage medium by adaptively preparing a standard for distinguishing bit | 08-28-2008 |
20080239914 | DATA RESTORING METHOD AND HOLOGRAPHIC DATA RECORDING AND/OR REPRODUCING APPARATUS - A method for to restore quantization data to binary data in a system for recording and/or reproducing the binary data includes selecting a selection region predicted to include an alignment mark from the quantization data, determining a location of the alignment mark within the selection region; and converting the quantization data to the binary data based on a comparison of the determined location of the alignment mark and an original location of the alignment mark. | 10-02-2008 |
20090189652 | Frequency Multiplier - A frequency multiplier is disclosed. A plurality of voltage regulators each regulate levels of voltages at first and second common nodes in response to a corresponding one of input signals from a voltage-controlled delay line. An input buffer charges the first node or discharges the second node in response to a feedback signal. An output buffer regulates a level of a voltage at an output node and outputs a frequency-multiplied clock signal and the feedback signal corresponding to the voltage level of the output node. A discharge circuit discharges the first node before a rising edge of each of the input signals from the voltage-controlled delay line is inputted. A charge circuit charges the second node before the rising edge of each of the input signals from the voltage-controlled delay line is inputted. | 07-30-2009 |
20090195421 | METHOD AND APPARATUS FOR CONTROLLING DIGITAL SUM VALUE AND RECORDING MEDIUM FOR EXECUTING THE METHOD - A method of controlling a Digital Sum Value (DSV), including generating a plurality of DSV control bit patterns indicating predetermined information represented by at least one bit; and inserting any one of the generated DSV control bit patterns at a predetermined location of a modulated codeword. The plurality of the DSV control bit patterns indicate predetermined information represented by at least one bit so that the DSV control bit patterns control the DSV and can be used as predetermined information, instead of being discarded after the demodulation is completed. | 08-06-2009 |
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 |
20130078019 | FUSING DEVICE AND METHOD USING INDUCTION HEATING AND IMAGE FORMING APPARAUS INCLUDING THE FUSING DEVICE - An induction heating fusing device and method of an image forming apparatus including: a pressure roller; a heating element that forms a fusing nip together with the pressure roller and is rotatable; an inductor that is installed in a rotation axis direction on the outer circumference surface of the heating element, includes a main coil and a plurality of control coils located on the main coil, and inductively heats the heating element; and a controller that selectively drives at least one of the plurality of control coils depending on the width of a printing paper passing though the fusing nip, and controls the main coil and the plurality of control coils so that a current direction of the main coil and a current direction of the plurality of control coils become the same as or opposite to each other depending on the width of the printing paper. | 03-28-2013 |
20130259549 | 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. | 10-03-2013 |
20140064764 | 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. | 03-06-2014 |
20140064807 | 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. | 03-06-2014 |
20140253534 | OUTPUT BUFFER CIRCUIT AND SOURCE DRIVING CIRCUIT INCLUDING THE SAME - A source driving circuit includes an output buffer circuit to compensate for slew rate of signals used to drive a display device. The output buffer circuit includes a bias current control signal generating circuit and a channel amplifying circuit. The bias current control signal generating circuit performs an exclusive OR operation on an input signal and an output signal of a reference operational amplifier to generate a bias current control signal. The channel amplifying circuit adjusts the slew rate of a plurality of output voltage signals in response to the bias current control signal. The output signals are then used to control the display device. | 09-11-2014 |