Patent application number | Description | Published |
20100092194 | IMAGE FORMING APPARATUS AND CONTROL METHOD THEREOF - An image forming apparatus and a control method of the image forming apparatus. The image forming apparatus includes a photosensitive medium, a charger to charge the photosensitive medium, an exposing unit to expose light to the photosensitive medium to form a latent image on the photosensitive medium, a developing unit which is disposed opposite to the photosensitive medium to develop the latent image into a visible image, a density sensing unit to sense a density of an area of the photosensitive medium, and a controller to determine whether a preset developing condition corresponds to a background image generating condition based on the density sensed by the density sensing unit and to adjust the developing condition based on the determination. | 04-15-2010 |
20100104299 | WASTE TONER AMOUNT DETECTING APPARATUS AND METHOD, AND IMAGE FORMING APPARATUS EMPLOYING THE SAME - Disclosed are a waste toner amount detecting apparatus and method which can detect whether a waste toner bottle is full of a waste toner using a change in a current of a motor which drives an auger, and an image forming apparatus employing the same. The waste toner amount detecting apparatus is in an image forming apparatus which includes a motor current detector to detect a drive current of a motor which rotates an auger for leveling the waste toner contained in the waste toner bottle; and a controller which includes a determining unit to determine whether the waste toner bottle is full of the waste toner, using a difference between a first current value corresponding to a minimum drive current of the motor and a second current value corresponding to a current drive current of the motor. | 04-29-2010 |
20100177335 | IMAGE FORMING APPARATUS WITH OPTIONAL DEVICES AND CONTROL METHOD THEREOF - A method of controlling an image forming apparatus, and an image forming apparatus to perform the method, the method including transmitting a pulse signal from a controller to a first optional device, setting an identification (ID) of the first optional device according to the received pulse signal, and incrementing the pulse signal and transmitting the incremented pulse signal so as to be received by a potential additional optional device | 07-15-2010 |
20110081160 | IMAGE FORMING APPARATUS AND METHOD OF CONTROLLING POWER THEREOF - An image forming apparatus includes a power supply unit to generate DC power, a plurality of function units to perform the functions of the image forming apparatus, a control unit to control the operation of a plurality of function units, a switching unit to receive DC power of the power supply unit and switch power provided to the control unit and each of a plurality of function units, and a power management unit to receive DC power of the power supply unit and to control a switching operation of the switching unit according to an operation mode of the image forming apparatus. | 04-07-2011 |
20110091235 | IMAGE FORMING APPARATUS AND METHOD TO DETECT TONER THEREOF - An image forming apparatus to detect the toner density of a patch pattern formed on a photosensitive medium or a transfer belt without a deviation in light intensity includes a density sensor including a light emitter to scan light onto at least one patch pattern formed as a toner image and a light receiver to receive light reflected from the at least one patch pattern and convert the received light to an electrical signal, a switch to turn on or off the light emitter, and a controller to maintain light intensity of the light emitter within a reference range by controlling on-time and off-time of the switch. | 04-21-2011 |
20110128569 | Image forming apparatus and control method thereof - An image forming apparatus including a main body having an image forming unit forming an image to a printing medium; and a plurality of mail box modules which are disposed to an output side of the printing medium in the main body, each mail box module respectively including a driving unit selectively outputting the printing medium from the main body, and a control circuit unit controlling the driving unit. The control circuit unit includes a shift register having channels corresponding to the total number of the plurality of mail box modules, and, if receiving an identifying ID information of the mail box module from the main body, turns on one channel of the channels corresponding to the identifying ID information; and a multiplexer which outputs an active signal to the driving unit if the channel turned on by the shift register corresponds to a predetermined identifying ID. | 06-02-2011 |
20120127517 | Image forming apparatus and power control method thereof - An image forming apparatus and a power control method thereof are provided. The image forming apparatus includes: an image forming unit which forms an image; a power supply which supplies operating power for the image forming apparatus; a switching circuit unit which switches to selectively supply the operating power; a memory unit which stores information about power status of the switching circuit unit; and a controller which outputs a power control signal for controlling a switching operation of the switching circuit unit in accordance with the information about the power status stored in the memory unit if power is abnormally shut off and then supplied again from the power supply to the switching circuit unit. With this, the image forming apparatus operates in a last power status, so that power can be prevented from being wastefully consumed or data can be prevented from being lost. | 05-24-2012 |
20120212783 | IMAGE FORMING APPARATUS AND A COMMUNICATION METHOD WITH TRAYS THEREOF - An image forming apparatus having a main body and optional trays and a communication method between the main body and the optional trays. The apparatus includes the main body having a main controller, at least one optional tray detachably set up in the main body and having a tray controller for communicating with the main controller to transmit and receive data, and communication lines forming a communication channel connecting the main controller and the tray controllers, for data exchange, and for informing the main controller that the data is provided from tray controllers to the main controller. Since the main body and the optional trays communicate through a single UART communication channel, the number of communication channels is decreased. | 08-23-2012 |
20130089344 | FUSING DEVICE OF IMAGE FORMING APPARATUS AND METHOD OF DETECTING LEAKAGE CURRENT THEREOF - A fusing device of an image forming apparatus including a fusing element in which a heat generation layer is formed and a pressurization element that forms a fusing nip by pressurizing and contacting the fusing element, the fusing device including: a power supplier for supplying a power supply voltage to the heat generation layer to heat the heat generation layer; a current signal detector for detecting a current signal corresponding to a difference between an input current of the heat generation layer and an output current of the heat generation layer; a determination unit for determining whether current leaks out of the heat generation layer by analyzing the current signal detected by the current signal detector; and a power breaker for preventing the power supply voltage, supplied from the power supplier, from being supplied to the heat generation unit, if the determination unit determines that current leaks out of the heat generation layer. | 04-11-2013 |
20130251384 | IMAGE FORMING APPARATUS AND TONER SENSOR STATUS SENSING METHOD THEREOF - An image forming apparatus which comprises a developing unit having a toner and a developer therein, the apparatus includes a toner sensor to receive a control voltage and to generate an output voltage corresponding to a remaining amount of the toner in the developing unit, a pulse width modulator to supply the control voltage to the toner sensor corresponding to a pulse width modulation (PWM) signal and a controller to control the pulse width modulator to supply the control voltage to the toner sensor to adjust a duty ratio of the PWM signal and make the output voltage reach a target value. | 09-26-2013 |
20140050501 | IMAGE FORMING APPARATUS AND METHOD OF CONTROLLING POWER THEREOF - An image forming apparatus includes a power supply unit to generate DC power, a plurality of function units to perform the functions of the image forming apparatus, a control unit to control the operation of a plurality of function units, a switching unit to receive DC power of the power supply unit and switch power provided to the control unit and each of a plurality of function units, and a power management unit to receive DC power of the power supply unit and to control a switching operation of the switching unit according to an operation mode of the image forming apparatus. | 02-20-2014 |
20140132986 | IMAGE FORMING APPARATUS AND IMAGE FORMING METHOD THEREOF, HOST APPARATUS AND IMAGE-FORMING CONTROL METHOD THEREOF, AND IMAGE FORMING METHOD OF IMAGE FORMING SYSTEM - An image forming method of a GDI image forming apparatus includes forming an image density pattern for tone compensation, measuring an image density of the formed image density pattern for tone compensation, and transmitting measured image density data of the image density pattern for tone compensation to a host apparatus communicating with the image forming apparatus. | 05-15-2014 |
20140380078 | IMAGE FORMING APPARATUS AND POWER CONTROL METHOD THEREOF - An image forming apparatus and a power control method thereof are provided. The image forming apparatus includes: an image forming unit which forms an image; a power supply which supplies operating power for the image forming apparatus; a switching circuit unit which switches to selectively supply the operating power; a memory unit which stores information about power status of the switching circuit unit; and a controller which outputs a power control signal for controlling a switching operation of the switching circuit unit in accordance with the information about the power status stored in the memory unit if power is abnormally shut off and then supplied again from the power supply to the switching circuit unit. With this, the image forming apparatus operates in a last power status, so that power can be prevented from being wastefully consumed or data can be prevented from being lost. | 12-25-2014 |
20150035927 | IMAGE FORMING APPARATUS AND A COMMUNICATION METHOD WITH TRAYS THEREOF - An image forming apparatus having a main body and optional trays and a communication method between the main body and the optional trays, the apparatus including: the main body having a main controller; at least one optional tray detachably set up in the main body and having a tray controller for communicating with the main controller to transmit and receive data; and communication lines forming a communication channel connecting the main controller and the tray controllers, for data exchange, and for informing the main controller that the data is provided from tray controllers to the main controller. Since the main body and the optional trays communicate through a single UART communication channel, the number of communication channels is decreased thereby saving time and simplifying protocol as well as reducing costs and simplify circuits. Also, it is possible to assign IDs rapidly and simply, prevent generation of errors in ID assignment, and make use of the image forming apparatus convenient. | 02-05-2015 |
Patent application number | Description | Published |
20120125879 | METHOD FOR FABRICATING CAPACITOR - A method for fabricating a capacitor includes: forming a first mold layer having a first through hole on a semiconductor substrate; forming a hole blocking layer filling and blocking an entrance of the first through hole; forming a second mold layer on the hole blocking layer and the first mold layer; forming a second through hole passing through the second mold layer and aligned with the first through hole; selectively removing the hole blocking layer exposed to the second through hole; forming a storage node along a profile of the first and second through holes; and selectively removing a portion of the first and second mold layers. | 05-24-2012 |
20120208340 | METHODS OF FABRICATING A STORAGE NODE IN A SEMICONDUCTOR DEVICE AND METHODS OF FABRICATING A CAPACITOR USING THE SAME - A storage node is formed in a semiconductor device by forming an interlayer insulation layer on a substrate, forming an etch stop layer and a first sacrificial layer on the interlayer insulation layer, patterning the first sacrificial layer and the etch stop layer to form a first sacrificial layer pattern and an etch stop layer pattern that define a storage node contact hole, forming a recessed first storage node conductive pattern that conformally covers a lower sidewall and a bottom surface of the storage node contact hole, forming a second storage node conductive pattern that includes a first portion surrounded by the recessed first storage node conductive pattern and a second portion conformally covering an upper sidewall of the storage node contact hole, and removing the first sacrificial layer pattern. The recessed first storage node conductive pattern and the second storage node conductive pattern constitute a storage node. | 08-16-2012 |
20140113431 | METHODS OF FABRICATING A STORAGE NODE IN A SEMICONDUCTOR DEVICE AND METHODS OF FABRICATING A CAPACITOR USING THE SAME - Methods of forming a storage node in a semiconductor device are provided. The method includes forming an interlayer insulation layer on a substrate, forming an etch stop layer and a first sacrificial layer on the interlayer insulation layer, patterning the first sacrificial layer and the etch stop layer to form a first sacrificial layer pattern and an etch stop layer pattern that define a storage node contact hole, forming a recessed first storage node conductive pattern that conformally covers a lower sidewall and a bottom surface of the storage node contact hole, forming a second storage node conductive pattern that includes a first portion surrounded by the recessed first storage node conductive pattern and a second portion conformally covering an upper sidewall of the storage node contact hole, and removing the first sacrificial layer pattern. The recessed first storage node conductive pattern and the second storage node conductive pattern constitute a storage node. | 04-24-2014 |