Patent application number | Description | Published |
20110310412 | IMAGE FORMING APPARATUS, NOISE CANCELLATION METHOD, AND RECORDING MEDIUM - An image forming apparatus comprising: a sound-level meter that measures operating noise of a rotating portion; a sound data generator that generates a noise control sound data object with the same amplitude but with the inverted phase to the operating noise; a speaker that emits sound based on the noise control sound data object; a memory that stores in advance a noise control sound data object generated to cancel out operating noise measured while the rotation frequency of the rotating portion is changed from a first rate to a second rate; and a controller that measures operating noise of the rotating portion and generates a noise control sound data object to cancel out the operating noise, then emits sound based on the noise control sound data object, while the rotating portion runs in steady state, meanwhile reads out from the memory, a suitable noise control sound data object from the memory and emit sound based on the noise control sound data object, during the transition of the rotation frequency of the rotating portion. | 12-22-2011 |
20120093537 | IMAGE FORMING APPARATUS PERFORMING CONTROL OF CHANGING TARGETS OF POWER SUPPLY FROM CHARGING DEVICE - An image forming apparatus includes a charging device for performing charging and discharging using a power storage device, and a plurality of loads each serving as a target of power supply from said charging device and being used in operation of the image forming apparatus. The image forming apparatus obtains information about an operation status of the image forming apparatus and sets priorities for being a target of power supply from the charging device for the plurality of loads, according to the obtained information. The image forming apparatus controls power supply operation of the charging device according to the information about the remaining capacity of the power storage device and the set priorities. | 04-19-2012 |
20130073879 | IMAGE FORMING APPARATUS - An image forming apparatus includes a functional unit, a first power supply circuit supplying electric power to the functional unit from a commercial power supply, a second power supply circuit including a self-generation power supply, and a third power supply circuit including a power storage unit storing electric power and a charging circuit charging the power storage unit upon receipt of supply of electric power from at least one of the commercial power supply and the self-generation power supply. In accordance with the amount of power supply from the self-generation power supply, higher priority is given to supply of electric power to the functional unit from at least one of the second and third power supply circuits than to supply of electric power from the first power supply circuit. | 03-21-2013 |
20130145184 | ELECTRONIC APPARATUS AND IMAGE FORMING APPARATUS - An electronic apparatus comprising: a main body including a reception unit and a processing unit; and a power supply device switches between an operation state for supplying power from an external power source to the main body and a standby state for supplying power from a secondary battery to the reception unit without supplying power from the power source to the main body. Charging of the battery with power from the power source is performed during the operation state and is terminated when a value indicating power level of the battery reaches a threshold value Vt satisfying (discharge lower limit VL+Vs)≦Vt06-06-2013 | |
20130214606 | ELECTRONIC DEVICE AND POWER-SOURCE DEVICE - Electronic device comprising: processing unit including accepting part accepting processing request from external device and executing process specified by request; secondary battery connected with external power source; and power-source device transitioning to operating state when request is accepted in waiting state, and transitioning to waiting state when processing unit completes executing process, wherein, in waiting state, power supply from external power source to processing unit is stopped and secondary battery supplies power to accepting part, and in operating state, power is supplied from external power source to processing unit. Power-source device includes controller executing first charge control operation to cause external power source to charge secondary battery when, in operating state, voltage of secondary battery is not higher than threshold, and end executing first charge control operation when transitioning to waiting state, controller updating threshold in response to increase in number of times first charge control operation is executed. | 08-22-2013 |
20140147157 | IMAGE FORMING DEVICE AND CHARGING METHOD FOR SECONDARY BATTERY - The image forming device includes a reception unit, an image forming unit, a switching unit, a detection unit, and a charging unit. The switching unit switches the image forming device between a first mode in which the reception unit is not supplied a voltage from a power source, is supplied power from a secondary battery, and receives image forming requests, and a second mode in which the image forming unit is supplied the voltage and performs image forming. The detection unit detects a value of an amount of energy of the secondary battery. In the second mode, the charging unit charges the secondary battery by supplying the voltage to the secondary battery when the value is equal to or less than a threshold value, and the charging unit boosts the voltage and supplies the boosted voltage to the secondary battery when the value is greater than the threshold value. | 05-29-2014 |
20140370359 | MAGNESIUM CELL AND MAGNESIUM CELL SYSTEM - A magnesium cell includes a positive electrode, a negative electrode including a magnesium alloy, and a separator disposed between the positive electrode and the negative electrode to hold an electrolytic solution, in which a contact area between the negative electrode and the separator is variable. | 12-18-2014 |
20150220044 | POWER CONTROLLER AND IMAGE FORMING APPARATUS - A power controller includes: a measuring unit that measures outputs from plural power generating devices outputting power to a common load in parallel; an adjusting unit that controls the outputs of the plural power generating devices to adjust output voltages of the plural power generating devices to a predetermined value; and a matching control unit that calculates power-voltage characteristics of the plural power generating devices based on values measured by the measuring unit, determines a target value of output voltage to be shared by all the plural power generating devices based on the power-voltage characteristics thus calculated and corresponding to the whole parallel connection of the plural power generating devices, and allows the adjusting unit to match the predetermined value with the target value. | 08-06-2015 |