Power Supply Patents (Class 399/37)
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Patent number: 7840153Abstract: An image forming apparatus having (1) a main power supply unit (PSU), which converts an AC power source into an AC power and a first DC power, provides the AC power to a fusing unit, and provides the first DC power to a plurality of DC-powered units in the image forming apparatus, (2) a supplemental power supply unit, which accumulates the AC power source and provides a second DC power to the plurality of DC-powered units for a predetermined period, and (3) a controller, which increases or decreases the AC power to be provided to the fusing unit and selects the DC power source from the main PSU and the supplemental PSU by detecting that the supplemental PSU can provide the DC power to the plurality of DC-powered units or not. When the supplemental power supply unit can provide DC power to the Plurality of DC-powered units, the controller increases the AC power from the main power supply unit to the fusing unit and shortens the recovery time.Type: GrantFiled: September 18, 2006Date of Patent: November 23, 2010Assignee: Ricoh Company, LimitedInventors: Toshitaka Semma, Yoshihisa Kimura, Tetsuya Yano, Norio Muraishi, Naoki Sato, Kazuhito Kishi
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Patent number: 7813665Abstract: A fixing unit mounting section is formed to a main body frame. A fixing unit is mounted to the fixing unit mounting section by inserting the fixing unit into the main body along a predetermined inserting direction. An electric power supply section configured to supply electric power to the fixing unit is arranged at a near side of the fixing unit mounting section in the inserting direction. A connecting section configured to establish electric connection to the electric power supply section is formed at the near side of the fixing unit in the inserting direction.Type: GrantFiled: July 7, 2006Date of Patent: October 12, 2010Assignee: Brother Kogyo Kabushiki KaishaInventors: Yasushi Fujiwara, Takuji Matsuno
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Patent number: 7809293Abstract: A method and apparatus is provided for checking for a disconnection, with respect to an image forming apparatus including electrical loads and voltage generating circuits that generate voltages that are applied to the electrical loads, by determining if the voltage generating circuits and electrodes that are electrically connected to the electrical loads are normally connected.Type: GrantFiled: August 28, 2007Date of Patent: October 5, 2010Assignee: Brother Kogyo Kabushiki KaishaInventor: Katsumi Inukai
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Publication number: 20100226662Abstract: Provided is an image forming apparatus having a network connecting portion, a control portion, and a status information storage portion. When a status request is sent from an external apparatus while the image forming apparatus is in a power-saving status, based on a condition set by a setting portion, the control portion makes a determination of whether (a) to perform supply of power to the main body of the image forming apparatus and acquire a status information to transmit it through the network portion or (b) not to perform supply of power to the main body of the image forming apparatus, but to transmit through the network portion a status information that has been stored in the status information storage portion before the status request, and performs controls based on the determination.Type: ApplicationFiled: February 26, 2010Publication date: September 9, 2010Applicant: Sharp Kabushiki KaishaInventor: Masahiro Takatani
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Patent number: 7769312Abstract: One embodiment of the present invention is provided with an image information storage unit, an image information processing unit, an actual image forming unit, an image information control unit that controls transfer of image information between each of the units, a power supply control unit, a cost information management unit that holds basic cost information prescribing power costs dependent on a usage time and calculates unit cost information, and an image processing time management unit that calculates a processing time required for image output jobs, wherein the image information control unit sets the execution timings of the image output jobs based on the basic cost information so that a total of image output costs of the image output jobs stored in the image information storage unit is lowest.Type: GrantFiled: September 27, 2007Date of Patent: August 3, 2010Assignee: Sharp Kabushiki KaishaInventor: Shinya Higashi
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Patent number: 7761017Abstract: A power supply apparatus includes an error detecting unit configured to perform error detection to detect that an output node and another node are placed in a short-circuit state or open-circuit state, a condition change detecting unit configured to detect a change in an external condition, and an operating-point changing unit configured to change an operating point of the error detection performed by the error detecting unit in response to the change detected by the condition change detecting unit.Type: GrantFiled: November 30, 2007Date of Patent: July 20, 2010Assignee: Ricoh Company, Ltd.Inventor: Akira Yashiro
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Patent number: 7751742Abstract: An image forming apparatus having a main body unit for forming an image on a recording medium, connectable to at least one post-processing unit for performing post-processing for the recording medium on which the image is formed, the image forming apparatus includes, a current value acquiring portion for acquiring at least one of a calculated value of a current and a measured value of the current as a value of the current flowing through the main body unit, and a control portion for selecting an operation mode from a plurality of operation modes each having a distinct value of current flowing through the main body unit.Type: GrantFiled: August 31, 2007Date of Patent: July 6, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Tadashi Matsudaira, Utami Soma, Atsushi Takahashi, Youbao Peng, Hiroshi Oyama, Shinpei Kawasaki
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Publication number: 20100166442Abstract: An image output apparatus, which outputs an image on a recording medium, and which is activated in an activation mode including a first activation mode and a second activation mode that consumes less power than the first activation mode, the image output apparatus including: a switching unit that selects one of the first activation mode and the second activation mode as the activation mode for activating the image output apparatus; and a storage unit that stores a total amount of power consumed on and after a reference time. The switching unit switches the activation mode from the first activation mode to the second activation mode when the amount of total power consumption stored in the storage unit is equal to or more than a first threshold value.Type: ApplicationFiled: December 23, 2009Publication date: July 1, 2010Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Akihiro YAMADA
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Patent number: 7742711Abstract: A fixing device usable with an image forming apparatus having a fixing roller to fix a toner on a recording medium, a heater to heat the fixing roller, and a power supplier to supply an electric power to the heater includes a relay interposed between the power supplier and the heater to supply and interrupt the electric power to the heater, an auxiliary power supplier to supply a driving power to the relay, and a thermoswitch interposed between the relay and the auxiliary power supplier and mounted adjacent to the fixing roller -to be electrically opened when the fixing roller reaches a predetermined overheating temperature. The fixing device is used in an image forming apparatus to reduce manufacturing costs and improve credibility and stability on an overheating prevention operation.Type: GrantFiled: February 2, 2006Date of Patent: June 22, 2010Assignee: Samsung Electronics Co., LtdInventors: Young-min Chae, Jin-ha Kim
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Publication number: 20100124425Abstract: An image forming apparatus that is capable of preventing an abnormal operation due to a voltage drop of a commercial power source and continuing an image forming operation efficiently even if the voltage drop occurs. A fixing unit fixes a toner image transferred onto a sheet. A voltage detection unit detects an input voltage of the commercial power source. A setting unit sets a fixing electric power supplied to the fixing unit from the commercial power source. A control unit suspends an operation when the set fixing electric power is less than a predetermined electric power and when the input voltage is less than a first voltage, and to continue the operation while reducing the set fixing electric power when the set fixing electric power is not less than the predetermined electric power and when the input voltage is less than a second voltage.Type: ApplicationFiled: November 11, 2009Publication date: May 20, 2010Applicant: CANON KABUSHIKI KAISHAInventor: Yasuyuki Aiko
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Patent number: 7715738Abstract: A high power supply to control an abnormal load includes a high voltage power processor to amplify a supplied DC power and to output the amplified DC power, a trans/rectifier to transform the DC power to a high voltage power and to rectify the high voltage power, a load detector to compare a load voltage output from a load with a predetermined reference voltage and to output a comparison voltage to detect the abnormal load of the load, and a high voltage controller to supply a chip enable signal to the high voltage power processor to interrupt the high voltage power processor when the comparison voltage output from the load detector is smaller than a predetermined reference value that is set to correspond to a minimum load of the load.Type: GrantFiled: February 4, 2009Date of Patent: May 11, 2010Assignee: Samsung Electronics Co., Ltd.Inventor: Hyung-won Hong
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Patent number: 7711275Abstract: A printer in which, while achieving a stabilization of image quality by process control processing, the generation of unnecessary wait time to the user, shortening of lifespan of the apparatus and needless consumption of toner caused by unnecessary execution of the process control processing can be better suppressed than in the prior art. An NVRAM serving as non-volatile information storage device in which stored information is retained even if the supply of power from an engine unit power source circuit is cutoff is provided in an engine unit, and timing signal information output from a timing circuit when the process control processing is executed is stored in the NVRAM, the engine unit being configured so as to judge, when power supply from the engine unit power source circuit starts, whether or not process control processing is to be executed in accordance with the timing signal information stored in the NVRAM and the timing signal output from the timing circuit.Type: GrantFiled: December 21, 2006Date of Patent: May 4, 2010Assignee: Ricoh Company, Ltd.Inventor: Yoshiaki Miyashita
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Patent number: 7664410Abstract: An image forming apparatus including a main power supply unit, a chargeable auxiliary power supply unit, a fixing unit including a heater configured to receive power from at least one of the main power supply unit and the auxiliary power supply unit, and a voltage or temperature detecting part configured to detect a voltage input to the main power supply unit from a commercial power supply or to detect a voltage of the auxiliary power supply unit or to detect an environment temperature. Energy accumulated in the auxiliary power supply unit can be controlled to not be supplied to the fixing unit at a time of starting the fixing unit if the voltage or temperatures detected are less than predetermined values.Type: GrantFiled: January 9, 2009Date of Patent: February 16, 2010Assignee: Ricoh Company, Ltd.Inventor: Hiromasa Takagi
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Patent number: 7621452Abstract: An electronic apparatus is capable of minimizing the increase in the capacity of a non-volatile memory provided in the wireless tag and of minimizing the increase in the time required for reading data. A sub unit such as a lid includes a wireless tag therein is detachably attached to an accommodating section such as a main body of the electronic apparatus. A reader-and-writer unit is housed in the accommodating section. When the sub unit is positioned in place in the accommodating section, the reader-and-writer unit communicates with the wireless tag to read data from the wireless tag and write data into the wireless tag. An anticipation signal generator provides an anticipation signal to the reader-and-writer unit when communication between the wireless tag and the reader-and-writer unit is anticipated to fail. The reader-and-writer unit is prevented from communicating with the wireless tag in accordance with the anticipation signal.Type: GrantFiled: September 1, 2005Date of Patent: November 24, 2009Assignee: Oki Data CorporationInventor: Yoichi Hayakawa
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Patent number: 7613407Abstract: An image forming apparatus includes a waste toner system that collects waste toner in a waste toner container. An amount of waste toner collected in the container is increased by using a driven toner distributing member that distributes accumulated toner within the container. The toner distributing member may be driven by a shared speed-controlled motor that further drives an image forming process member. The waste toner system may detect the accumulation of waste toner by monitoring a drive control circuit while the toner distributing member is being driven. For example, a logic circuit may detect the accumulation of waste toner based on monitoring a predetermined frequency of interest of a frequency domain transform of a motor control signal, the frequency of interest associated with the shared motor driving the toner distributing member.Type: GrantFiled: May 15, 2006Date of Patent: November 3, 2009Inventors: Michael William Craig, Steven Michael Turney, Danny Keith Chapman
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Publication number: 20090214235Abstract: An image forming apparatus includes; a main body; a detachable member; a cover; a displacement member movable between a preventing position and a permitting position; a one-way link mechanism provided for displacing the displacement member from the preventing position to the permitting position when the cover is opened from a state in which the cover is closed and the displacement member is disposed in the preventing position, and for keeping the displacement member in the permitting position when the cover is closed from a state in which the cover is opened; a position detection unit for detecting a position of the displacement member right after a power supply unit has been switched on; and a history determination unit for determining an existence of a history showing an opening and closure of the cover while the power supply unit is left off based on the position of the displacement member.Type: ApplicationFiled: February 20, 2009Publication date: August 27, 2009Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Yoshiteru HATTORI
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Patent number: 7573007Abstract: This invention provides a power supply which supplies an AC electric current to the coil of a heating unit employing the electromagnetic induced heating method via a connector connecting a plurality of wires, and a method for the power supply. The method includes the steps of supplying electric currents to the coil via 1st and 2nd wires from 1st and 2nd electric current supply units and detecting feedback electric currents via 3rd and 4th wires through the coil. Whether an electric current is abnormally supplied to the coil is monitored on the basis of these detected electric currents. It is controlled in accordance with the monitoring result to stop driving the 1st and 2nd electric current supply units and supply an electric current to the coil.Type: GrantFiled: August 25, 2006Date of Patent: August 11, 2009Assignee: Canon Kabushiki KaishaInventor: Junji Ishikawa
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Patent number: 7574152Abstract: An AC high-voltage device includes a voltage controlling unit that controls an AC transforming unit. The AC transforming unit transforms supplied power to an AC high voltage. The voltage controlling unit includes a constant-voltage controlling unit and an turn-off unit. The constant-voltage controlling unit controls the AC transforming unit when an over-current does not occur in the AC high voltage. The turn-off unit turns off the AC transforming unit during a period in which an over-correct occurs. The constant-voltage controlling unit re-starts the AC transforming unit after the period.Type: GrantFiled: October 27, 2006Date of Patent: August 11, 2009Assignee: Ricoh Company, LimitedInventor: Yoshihisa Ashikawa
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Patent number: 7565086Abstract: According to an aspect of the present invention, an image forming apparatus comprising: a heater heating unit configured to heat a heater at a first temperature or a second temperature lower than the first temperature when waiting for fixation of a formed image; and a heat control unit configured to heat the heater at the first temperature when the estimated amount of power consumption is significant and to control the heater heating unit so as to heat the heater at the second temperature when the estimated amount of power consumption is small on the basis of distribution of the estimated amount of power consumption consumed by the fixation with time for a certain period of time is obtained is provided.Type: GrantFiled: March 8, 2006Date of Patent: July 21, 2009Assignees: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventor: Yoshihiro Tsujimura
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Publication number: 20090142081Abstract: A high power supply to control an abnormal load includes a high voltage power processor to amplify a supplied DC power and to output the amplified DC power, a trans/rectifier to transform the DC power to a high voltage power and to rectify the high voltage power, a load detector to compare a load voltage output from a load with a predetermined reference voltage and to output a comparison voltage to detect the abnormal load of the load, and a high voltage controller to supply a chip enable signal to the high voltage power processor to interrupt the high voltage power processor when the comparison voltage output from the load detector is smaller than a predetermined reference value that is set to correspond to a minimum load of the load. Therefore, a user and peripheral components an image forming apparatus are protected from electric shock and being damaged by interrupting an output of the high voltage according to the abnormal load.Type: ApplicationFiled: February 4, 2009Publication date: June 4, 2009Applicant: Samsung Electronics Co., LtdInventor: Hyung-won HONG
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Publication number: 20090087201Abstract: An image recording apparatus having a both-side printing function for ejecting ink to record images on a first face and a second face of a recording medium is provided. The image recording apparatus includes: a conveying unit which conveys the recording medium; a driving unit which drives the conveying unit; a conveying path along which the recording medium is conveyed; a holding unit which is provided on the conveying path and holds a part of the recording medium; and a controller which controls the image recording apparatus to enter a power saving mode of interrupting power supply to at least the driving unit in a state that the recording medium is held by the holding unit, after the image is recorded on the first face of the recording medium but before the image is recoded on the second face of the recording medium.Type: ApplicationFiled: October 1, 2008Publication date: April 2, 2009Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Shunsuke MIZUTANI
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Patent number: 7505702Abstract: A high power supply to control an abnormal load includes a high voltage power processor to amplify a supplied DC power and to output the amplified DC power, a trans/rectifier to transform the DC power to a high voltage power and to rectify the high voltage power, a load detector to compare a load voltage output from a load with a predetermined reference voltage and to output a comparison voltage to detect the abnormal load of the load, and a high voltage controller to supply a chip enable signal to the high voltage power processor to interrupt the high voltage power processor when the comparison voltage output from the load detector is smaller than a predetermined reference value that is set to correspond to a minimum load of the load. Therefore, a user and peripheral components an image forming apparatus are protected from electric shock and being damaged by interrupting an output of the high voltage according to the abnormal load.Type: GrantFiled: March 9, 2006Date of Patent: March 17, 2009Assignee: Samsung Electronics Co., Ltd.Inventor: Hyung-won Hong
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Publication number: 20090060537Abstract: An image forming apparatus includes an image forming unit for forming an image using a consumable supply; a cover attached to the image forming unit; an energy accumulation unit for accumulating energy when the cover is closed; an energy initializing unit for initializing a level of the energy accumulated in the energy accumulation unit when the cover is opened; an energy detection unit for detecting whether the level of the energy accumulated in the energy accumulation unit is initialized; and a state correction unit for correcting a state of the image forming unit according to a detection result of the energy detection unit.Type: ApplicationFiled: August 21, 2008Publication date: March 5, 2009Inventor: Masahiro Nakabayashi
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Patent number: 7483644Abstract: An image forming apparatus including an AC high voltage power supply, a DC high voltage power supply, and a high voltage power supply apparatus, which outputs an output voltage at an output end by superposing an output of the AC high voltage power supply and an output of the DC high voltage power supply. The high voltage power supply apparatus has a positive peak detector detecting a positive peak of the voltage at an output end, and a negative peak detector detecting a negative peak of the voltage at an output end. An output voltage of at least one of the AC high voltage power supply and the DC high voltage power supply is controlled on the basis of the detection result of at least one of the positive peak detector and the negative peak detector.Type: GrantFiled: October 13, 2005Date of Patent: January 27, 2009Assignee: Canon Kabushiki KaishaInventors: Takehiro Uchiyama, Takeshi Kawamura, Tomohiro Nakamori
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Publication number: 20090022508Abstract: An energy-saving control unit detects a supply of power to an image forming apparatus and performs an energy saving control of an external controller. A switching unit switches a start and a stop of supply of power to an onboard circuit of the external controller. Upon detecting the supply of power to the image forming apparatus, the energy-saving control unit sends a power control signal for instructing a start of the supply of power to the onboard circuit to the switching unit. Upon receiving the power control signal, the switching unit switches to the start of the supply of power to the onboard circuit.Type: ApplicationFiled: July 18, 2008Publication date: January 22, 2009Inventor: Kohhei YAMAGUCHI
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Publication number: 20090010661Abstract: An image forming apparatus includes: a plurality of photosensitive members; a plurality of discharging units respectively facing the plurality of photosensitive members; a plurality of high-voltage power supply units which are provided for the plurality of charging units and supply power to the plurality of discharging units; a discharge detection unit that detects abnormality in the plurality of discharging units; a controller which controls the output of one of the high-voltage power supply units having the largest output to be smaller when the discharge detection unit detects abnormality; and a determination unit which, in a state where the controller controls the output of the one of the high-voltage power supply unit, determines whether abnormality occurs in the discharging unit corresponding to the one of the high-voltage power supply unit based on the detection state of the discharge detection unit.Type: ApplicationFiled: July 3, 2008Publication date: January 8, 2009Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Masahito HAMAYA
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Patent number: 7469110Abstract: An image forming apparatus adapted for a smooth mounting/dismounting of a process unit and for the reduction of wasteful power consumption is provided. Unless a new image signal is applied after completion of an image forming operation, the apparatus starts a clocking operation by an internal timer (Step S101). If the apparatus is left standstill for a predetermined length of time (Step S102), a sleep process (Step S103) is executed to shift the apparatus to a power save mode to consume less power. When an outside cover is opened (Step S105), on the other hand, the apparatus is shifted to a replacement operation mode (Step S106) in which only the rotation of a development rotary is permitted. However, if the apparatus is left with the outside cover opened (Step S108), the sleep process is executed.Type: GrantFiled: October 15, 2004Date of Patent: December 23, 2008Assignee: Seiko Epson CorporationInventors: Hiroshi Nakazato, Ken Ikuma, Keiichi Taguchi
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Patent number: 7412185Abstract: Disclosed are embodiments for controlling one or more subsystems of an imaging system to manage average power to a fuser.Type: GrantFiled: February 16, 2005Date of Patent: August 12, 2008Assignee: Hewlett-Packard Development Company, L.P.Inventors: Jeffrey Hall, Michael Martin, Bartley Mark Hirst
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Publication number: 20080166146Abstract: An image forming apparatus includes a moving unit including a conveyer belt which moves a printing medium, an attraction unit to attract the printing medium to the conveyer belt, a transferring unit to transfer developer onto the printing medium, a power supply which supplies transfer power and attraction power to the transferring unit and the attraction unit, and a controller which controls the power supply to supply only one of the transfer power and the attraction power in accordance with a location of the printing medium.Type: ApplicationFiled: December 21, 2007Publication date: July 10, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Jeong-hwan KIM, Jin-cheol Kim, Hyun-sun Jung, Yoo-seok Yang
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Patent number: 7398405Abstract: An output system having an output device that performs output based on output data so that the output device performs the output after having acquired authentication. In the system, an operating state controlling unit outputs a power-save-cancel command for causing a power-saving state to be changed into an active state to a power-save switching unit after a device having an output data storing unit acquires the output data, and a transition-to-power-save command for causing the state to be changed from the active state to the power-saving state is outputted to the power-save switching unit when the output process of the output data is completed by an output process completion detecting unit.Type: GrantFiled: December 8, 2005Date of Patent: July 8, 2008Assignee: Seiko Epson CorporationInventors: Mikio Aoki, Yusuke Takahashi
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Publication number: 20080138099Abstract: A power supply apparatus includes an error detecting unit configured to perform error detection to detect that an output node and another node are placed in a short-circuit state or open-circuit state, a condition change detecting unit configured to detect a change in an external condition, and an operating-point changing unit configured to change an operating point of the error detection performed by the error detecting unit in response to the change detected by the condition change detecting unit.Type: ApplicationFiled: November 30, 2007Publication date: June 12, 2008Inventor: Akira Yashiro
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Patent number: 7372479Abstract: An image forming apparatus for forming images with an electrophotographic system. The image forming apparatus includes a laser drive unit configured to control a laser light, and an image data transfer control unit configured to control image data from to the laser drive unit. The apparatus also includes a polygon mirror configured to reflect laser light from the electrophotographic system, a polygon mirror drive unit including a motor configured to rotate the polygon mirror, and a power supply level detecting unit configured to detect a voltage level of power supplied to the polygon mirror drive unit by an electric power supply unit. The image data transfer control unit is configured to provide any width and any number of a first pulse signal indicating a state when power supply is cut off to the polygon mirror drive unit.Type: GrantFiled: June 30, 2005Date of Patent: May 13, 2008Assignee: Ricoh Company, Ltd.Inventor: Hiroki Ohkubo
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Patent number: 7362591Abstract: When a detected current value deviates from a range between an upper limit value and a lower limit value, a pulse width adjustment operation for increasing or decreasing a currently set counter value is repeatedly performed at every operation time interval such that the detected current value is brought to be close to the range between the upper limit value and the lower limit value under a forward control. When the detected current value falls in the range between the upper and the lower limit values after execution of the forward control, a reverse control is executed such that a pulse width of a PWM signal is changed in an adjustment direction opposite to that under the forward control.Type: GrantFiled: July 10, 2006Date of Patent: April 22, 2008Assignee: Brother Kogyo Kabushiki KaishaInventor: Katsumi Inukai
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Publication number: 20080056740Abstract: The present invention includes a method and apparatus for checking for a disconnection, with respect to an image forming apparatus including electrical loads and voltage generating circuits that generate voltages that are applied to the electrical loads, by determining if the voltage generating circuits and electrodes that are electrically connected to the electrical loads are normally connected.Type: ApplicationFiled: August 28, 2007Publication date: March 6, 2008Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Katsumi INUKAI
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Patent number: 7333745Abstract: An electronic apparatus and a power supply device used with the electronic apparatus is capable of automatically shutting off power from a power supply to the electronic apparatus when an access cover is opened. The electronic apparatus includes a casing that houses a power control unit therein, and having one end open, an access cover disposed at the casing to open and close the open side of the casing, and a power supply device that connects an external power source to the power control unit. The power supply device shuts the power control unit off from the external power source when the open side is open. Accordingly, when the access cover is opened for the operations such as additional installation of the optional item or replacement of inner parts with new ones, the external power supply is automatically shut off. Therefore, accidents such as electrocution or burns, can be prevented, and damage to the electronic apparatus caused by the electrical shock can also be prevented.Type: GrantFiled: June 21, 2004Date of Patent: February 19, 2008Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hee Han, In-sik Seo
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Patent number: 7324773Abstract: A sheet counter counts points corresponding to the number of sheets subjected to a fixing process performed by a fixing unit during the image forming operation (during the copy state). A heater actuation time counter counts points corresponding to the heater actuation time (ON time) when a fixing operation is performed by a fixing unit during the image forming operation (during the copy state). When power consumption is high, a fixing control temperature can be set so as to reduce the power consumption during the non-image forming operating time (standby state and preheat state) by determining the power consumption (of the fixing unit) during the image forming operation based on the points counted by a sheet counter during one week, or points counted by a heater actuation time counter during one week.Type: GrantFiled: October 27, 2005Date of Patent: January 29, 2008Assignee: Kyocera Mita CorporationInventor: Tsukasa Sugiyama
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Publication number: 20070280708Abstract: Power consumption P of a building where plural image forming apparatuses 1 are installed is detected. When this detection result reaches an upper limit value Pa, power consumption of each of the image forming apparatuses 1 is reduced.Type: ApplicationFiled: May 31, 2006Publication date: December 6, 2007Applicants: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki KaishaInventors: Yoshikatsu KAMISUWA, Rintaro Nakane
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Patent number: 7283262Abstract: A sub-CPU copes with a status obtaining request from a network in a sleep mode. Further, necessary least power control for updating a status in an image forming apparatus in the sleep mode is realized by the sub-CPU.Type: GrantFiled: July 1, 2003Date of Patent: October 16, 2007Assignee: Canon Kabushiki KaishaInventors: Tomoyuki Takeda, Kazuki Miyamoto, Shigeo Miura, Takeharu Uchizono, Takahiro Ushiro, Shinichi Takata
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Publication number: 20070230977Abstract: A power conservation device includes a detection unit for detecting a status of the power conservation device; a detection unit power source for supplying power to the detection unit; an operation control unit for controlling an operation of the power conservation device according to output information from the detection unit; an operation unit power source for supplying power to the operation control unit; an information processing unit for processing specific information and controlling the operation unit power source; and a monitoring unit for monitoring a change in the output information of the detection unit. The detection unit power source supplies power to the detection unit intermittently when the operation unit power source stops supplying power to the operation control unit. The information processing unit controls the operation unit power source to supply power to the operation unit when the monitoring unit detects the change in the output information of the detection unit.Type: ApplicationFiled: March 15, 2007Publication date: October 4, 2007Inventor: Yoichi Hayakawa
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Patent number: 7277652Abstract: A laser printer capable of controlling the operation of a fixing heater to heat a roller, including an energizing circuit for energizing a heater, a temperature detecting circuit such as thermistors, a noise canceling circuit, and a control circuit for controlling the energizing circuit and the heater. After receiving a voltage indicating an abnormal temperature of the heater over a prescribed length of time duration, the noise canceling circuit is configured to transmit a LOW level voltage to a latch circuit as an abnormality signal. The control circuit suspends the energization of the heater in response to the abnormality signal.Type: GrantFiled: May 31, 2005Date of Patent: October 2, 2007Assignee: Brother Kogyo Kabushiki KaishaInventor: Isao Kubo
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Patent number: 7277654Abstract: A power supply control system for a fuser assembly in an electrophotographic apparatus includes a power supply and a fuser assembly. The power supply includes a first electrical path designated for a fuser assembly that operates at a first voltage and a second electrical path designated for a fuser assembly that operates at a second voltage. The fuser assembly is configured to operate at a select one of the first voltage or the second voltage and is connected to the first electrical path if the fuser assembly operates at the first voltage, and the fuser assembly is connected to the second electrical path if the fuser assembly operates at the second voltage. The first and second electrical paths allow different device features including power limiting devices such as fuses, switches, relays, etc., to be placed in each path.Type: GrantFiled: June 24, 2005Date of Patent: October 2, 2007Assignee: Lexmark International, Inc.Inventors: Mark K. DeMoor, John W Kietzman, Gregory H. McClure, William A. Menk, Jr., Calvin D. Murphy, Lawrence G. Teply
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Patent number: 7272328Abstract: An image forming device and method of detecting the presence or absence of components of one or more image forming units. Each image forming unit includes a replaceable component. A power supply transmits an input signal to the replaceable component. A detection circuit is coupled to the replaceable component and generates an output signal indicative of the presence or absence of an electrical coupling that is established when the replaceable component is installed. The detection circuit thus senses the input signal propagating through the replaceable component. A controller may be adapted to halt image formation or generate an error indication if the detection circuit detects the absence of necessary components or the presence of components not necessary for a current mode of operation.Type: GrantFiled: March 29, 2005Date of Patent: September 18, 2007Assignee: Lexmark International, Inc.Inventors: Gregory Lawrence Ream, Mark Kevin DeMoor
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Patent number: 7251431Abstract: There is described an image reading apparatus, which employs the electric double layer. The image reading apparatus includes: an electric power source; an analogue image signal generating section that is coupled to the electric power source through a power line and converts an optical image to analogue image signals; an electric double layer capacitor that is coupled to the power line; a first switch that is coupled to both the electric power source and the electric double layer capacitor, in such a manner that the first switch is inserted between them; and a controlling section to control the first switch so as to make the first switch open in response to a output request signal for requesting an outputting operation of the analogue image signals.Type: GrantFiled: July 14, 2005Date of Patent: July 31, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventor: Hiroyuki Yamamoto
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Patent number: 7227281Abstract: A system of one embodiment is disclosed that includes a load, a power supply, and a mechanism. The load is operable in a default mode and an alternate mode. The load has better performance in the default mode than in the alternate mode, and consumes less peak power in the alternate mode than in the default mode. The power supply is connectable to an external power source to provide voltage to at least the load. The mechanism causes the load to operate in the alternate mode upon detecting the voltage provided by the power supply dropping below a predetermined threshold level more than a predetermined threshold number of times.Type: GrantFiled: June 14, 2002Date of Patent: June 5, 2007Assignee: Hewlett-Packard Development Company, L.P.Inventor: Thomas G. Radley
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Patent number: 7212758Abstract: An image-forming apparatus is disclosed. The image-forming apparatus includes a fixing unit. The fixing unit includes: a heating part including a heating element; a power storage unit including a chargeable and dischargeable capacitor and supplying power to the heating part so that the heating element of the heating part generates heat; and a controller controlling the operation of the power storage unit. When the image-forming operation of the image-forming apparatus is suspended by an abnormality, the controller performs control such that the capacitor is charged in accordance with its remaining amount of stored energy.Type: GrantFiled: April 13, 2006Date of Patent: May 1, 2007Assignee: Ricoh Company, Ltd.Inventors: Kazuhito Kishi, Yasuhisa Kato, Akiyasu Amita, Masami Okamoto, Yasutada Tsukioka, Hiromasa Takagi
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Patent number: 7206527Abstract: An image forming apparatus is disclosed having a fixing unit having a heating device, for heat fixing, a heating power supply section which is connected to the fixing unit to supply electric power supplied from a commercial power supply to the heating device, a voltage detecting section for detecting a value of voltage supplied to the heating power supply section from the commercial power supply, and a control section that stops a supply of electric power to the heating device from the heating power supply section if a first voltage value is smaller than a standard voltage value, while, compares a second voltage value detected by the voltage detecting section after the lapse of the standard time with the standard voltage value, and conducts control to stop operations for image forming if the second voltage value is smaller than the standard voltage value.Type: GrantFiled: July 22, 2004Date of Patent: April 17, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yoshihito Sasamoto, Atsushi Takahashi, Norio Joichi, Youbao Peng, Akifumi Isobe, Yoshiki Katayama
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Patent number: 7203432Abstract: A job processing apparatus includes a job executing section, an operating section, an interface section, and a control section. The control section shifts the job processing apparatus from a normal operation mode to a power-saving operation mode after a lapse of standby time T during which no command input to the job executing section is detected. The control section returns the job processing apparatus from the power-saving operation mode to the normal operation mode when a command input to the job executing section is detected in the power-saving operation mode. The control section utilizes standby time T1, instead of the standby time T, if a last job executed by the job executing section is according to job data input through the interface section. The standby time T1 is shorter than the standby time T.Type: GrantFiled: February 14, 2005Date of Patent: April 10, 2007Assignee: Sharp Kabushiki KaishaInventors: Hirohito Morioka, Mikiya Okada, Tsutomu Itai, Hirotaka Kodama
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Patent number: 7187877Abstract: An image forming apparatus includes an apparatus body (48); image bearing bodies (11) for forming electrostatic latent images; a transfer unit (19) opposed to the image bearing bodies and having transfer sections (15); a voltage supply (13) for generating a transfer voltage; a mounting member (12) for bringing the transfer sections (15) into contact with the image bearing bodies (11) when the transfer unit (19) is installed at an appropriate position within the apparatus body (48) and into non-contact with the image bearing bodies (11) when the transfer unit (19) is installed at an inappropriate position within the apparatus body (48); and detection devices (14) for applying the transfer voltage to the transfer sections (15) to detect whether the transfer unit (19) is in contact with the image bearing bodies (11).Type: GrantFiled: December 23, 2004Date of Patent: March 6, 2007Assignee: Oki Data CorporationInventor: Yasunaga Yamaguchi
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Patent number: 7181149Abstract: There is described an image forming apparatus, in which the influence of the overall controlling section startup time is reduced, thereby cutting down the time from turning on of power to enabling of image formation. The image forming apparatus includes: a main power switch to turn ON/OFF an AC power source to be supplied into the image forming apparatus; a DC power current generating section to convert AC power current, fed from the AC power source, to DC power current; an overall-controlling section to control overall operations of the image forming apparatus; an engine-controlling section to conduct a predetermined controlling operation among from controlling operations to be conducted in the image forming apparatus; a first power-controlling section, included in the overall-controlling section and/or controlled by the overall-controlling section; and a second power-controlling section, having a starting time shorter than that of the first power-controlling section.Type: GrantFiled: September 27, 2004Date of Patent: February 20, 2007Assignee: Konica Minolta Business Technologies, Inc.Inventors: Norio Joichi, Tadashi Matsudaira, Youbao Peng, Hiroshi Oyama, Katsunori Takahashi, Masayuki Watanabe, Yoshiki Katayama, Shinpei Kawasaki, Takashi Nara
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Patent number: 7162166Abstract: An image-forming apparatus having an automatic self-test reporting function and a method thereof. The image-forming apparatus has a function of preparing and printing a separate result report as to a result of the self test performed at the time when the image-forming apparatus is powered on for the first time. Thus, the image-forming apparatus purchased by a user can notify the user whether errors exist, countermeasures to the errors, and initial setting options of the image-forming apparatus at the same time when the image-forming apparatus is powered on for the first time, enabling the user to be able to rely on the image-forming apparatus. Further, extra manipulations by a user to obtain the initial setting options of the image-forming apparatus are not required.Type: GrantFiled: May 10, 2005Date of Patent: January 9, 2007Assignee: Samsung Electronics Co., Ltd.Inventor: Hyung-sik Byun