Patent application number | Description | Published |
20120139653 | SURFACE ACOUSTIC WAVE RESONATOR, SURFACE ACOUSTIC WAVE OSCILLATOR, AND ELECTRONIC APPARATUS - A surface acoustic wave resonator which can realize favorable frequency-temperature characteristics and suppress frequency variations is provided. The surface acoustic wave resonator includes a quartz crystal substrate with Euler angles (−1.5°≦φ≦1.5°, 117°≦θ≦142°, and 42.79°≦|Ψ|≦49.57°), and an IDT that is provided on the quartz crystal substrate, includes a plurality of electrode fingers, and excites a stop band upper end mode surface acoustic wave, wherein inter-electrode finger grooves are provided between the electrode fingers in a plan view, and wherein if a line occupation rate of convex portions of the quartz crystal substrate disposed between the inter-electrode finger grooves is ηg, and a line occupation rate of the electrode fingers disposed on the convex portions is ηe, η | 06-07-2012 |
20140055207 | SURFACE ACOUSTIC WAVE RESONATOR, SURFACE ACOUSTIC WAVE OSCILLATOR, AND ELECTRONIC APPARATUS - A surface acoustic wave resonator includes a quartz crystal substrate with preselected Euler angles, and an IDT that is provided on the quartz crystal substrate, that includes a plurality of electrode fingers, and that excites a stop band upper end mode surface acoustic wave. Inter-electrode finger grooves are provided in the quartz crystal substrate between the electrode fingers in a plan view. When a wavelength of the surface acoustic wave is λ, a first film thickness of the electrode finger is H, and a first depth of the inter-electrode finger groove is G, and when a line occupation rate of convex portions of the quartz crystal substrate disposed between the inter-electrode finger grooves is ηg, and a line occupation rate of the electrode fingers disposed on the convex portions is ηe, the following relationships are satisfied 0.0407λ≦G+H; and ηg>ηe. | 02-27-2014 |
Patent application number | Description | Published |
20090018754 | INTAKE AIR AMOUNT CONTROL APPARATUS FOR ENGINE AND CONTROL METHOD THEREOF - The present invention provides an intake air amount control apparatus for an engine and a control method of an intake air amount of an engine, in which, when the atmospheric pressure exceeds a threshold value, a target lift amount of an intake valve is determined based on a target intake air amount and an electronically controlled throttle is controlled to generate a target boost pressure. On the other hand, when the atmospheric pressure does not exceed the threshold value because of a vehicle traveling at a high altitude, the target lift amount of the intake valve is fixed to a maximum lift amount and the opening angle of the electronically controlled throttle is determined in response to the target intake air amount. Consequently, an actual intake air amount is controlled to be brought to the target intake air amount thereby generating negative pressure necessary for exhaust gas recirculation. | 01-15-2009 |
20110234133 | BRUSHLESS MOTOR DRIVE APPARATUS AND DRIVE METHOD - The present invention relates to a drive apparatus and drive method for switching an energization mode when a voltage of a non-energized phase of a brushless motor crosses a threshold. In threshold learning, first, the brushless motor is stopped at an initial position. The brushless motor is then rotated by performing phase energization based on the energization mode from the stopped state. The voltage of the non-energized phase at an angular position of switching the energization mode is detected from a maximum value or a minimum value of the voltage of the non-energized phase during the rotation, and the threshold is learned based on the detected voltage. Alternatively, the brushless motor is positioned at the angular position of switching the energization mode by maintaining one energization mode, and then the energization mode is switched to the next energization mode. The voltage of the non-energized phase immediately after the switching to the energization mode is detected, and the detected voltage of the non-energized phase is learned as the threshold used to determine the timing of switching to the next energization mode. | 09-29-2011 |
20120306416 | BRUSHLESS MOTOR DRIVE DEVICE AND DRIVE METHOD - The invention relates to a brushless motor drive device that performs switching determination of energization modes of a three-phase brushless motor according to a sensorless method, and a drive method thereof. A pulse induced voltage induced in a non-energized phase of three phases by a pulse voltage is compared with a threshold to determine the switching timing of the energization modes. Here, by limiting a duty ratio of a voltage application to equal to or greater than a lower limit, a situation in which the pulse induced voltage is sampled while the pulse induced voltage is oscillating is avoided, and a situation in which the pulse induced voltage falls below a voltage detection resolution is avoided. As a result, determination of energization mode switching timing based on a pulse induced voltage can be performed more stably. | 12-06-2012 |
20130069571 | BRUSHLESS MOTOR DRIVE DEVICE - A brushless motor drive device switches energization modes for supplying power to two phases of a three-phase brushless motor, based on an induced voltage induced in a non-energized phase. In a case in which a target duty ratio Dt, which is a duty ratio of a PWM signal according to a manipulated variable of the brushless motor becomes less than a detection limit value Dlim, which is the lower limit of a duty ratio capable of detecting an induced voltage, there is set a detection timing (1/N) for detecting an induced voltage according to the cycle of a PWM signal, and a detection time duty ratio D | 03-21-2013 |
20130069575 | BRUSHLESS MOTOR DRIVING APPARATUS AND BRUSHLESS MOTOR DRIVING METHOD - A brushless motor driving apparatus that rotates and drives a brushless motor, which has a plurality of coils, by switching energization modes corresponding to phases of the brushless motor, sequentially switches the energization modes based on a non-energized phase voltage and a voltage threshold. Also, the brushless motor driving apparatus regulates an upper threshold for energization amount based on the voltage threshold and a change in the non-energized phase voltage at timing of switching the energization mode. | 03-21-2013 |
20140084824 | Sensorless Driving Apparatus and Sensorless Driving Method for Brushless Motor - The present relates to a sensorless driving apparatus and a sensorless driving method for a brushless motor. In a state that the brushless motor is driven by rectangular waves, when the driving apparatus detects that a rotation speed of the brushless motor becomes higher than a predetermined speed and thereafter it detects that an angle of a rotor of the brushless motor becomes a predetermined angle, the driving apparatus switches the drive from rectangular wave drive to sign wave drive. The driving apparatus sets as the predetermined angle an angle at which energizing mode is switched in the rectangular wave drive or an angle at which a motor torque is at a peak value in the rectangular wave drive. | 03-27-2014 |
Patent application number | Description | Published |
20080204676 | IMAGE FORMING APPARATUS AND METHOD - An image forming apparatus includes an image bearing member; charging means for charging a surface of the image bearing member; image exposure means for exposing the surface of the image bearing member charged by the charging means to light to form an electrostatic image on the surface of the image bearing member; switching means for switching a light emission level of the image exposure means in accordance with the set point of a light emission amount setting the light emission level of the image exposure means; storing means for storing light emission amount set points set corresponding to different target light emission levels of the image exposure means; light emission amount control means for controlling the light emission level of the image exposure means on the basis of information stored in the storing means; an input portion for inputting information relating to an actual light emission level of the image exposure means corresponding to a predetermined light emission amount set point; and correcting means for correcting the light emission amount set points stored in the storing means on the basis of the information relating to the light emission amounts of the image exposure means corresponding to different light emission amount set points. | 08-28-2008 |
20090269105 | CORONA CHARGER AND ELECTROPHOTOGRAPHIC APPARATUS - A corona charger includes a charging wire and a plate grid. The plate grid comprises a stainless steel base and a surface layer formed of tetrahedral amorphous carbon on the base. | 10-29-2009 |
20100158558 | IMAGE FORMING APPARATUS - An image forming apparatus includes a photosensitive member configured to form a toner image thereon, a corona charger located opposite the photosensitive member and including a discharging wire and a grid electrode, a bias applying unit configured to apply a bias to the corona charger, a cleaning unit configured to perform cleaning processing by sliding in a longitudinal direction of the grid electrode to rub an inner surface of the grid electrode, and an execution unit configured to execute a cleaning mode for performing the cleaning processing by the cleaning unit while applying a bias of a polarity equal to a normal charging polarity of toner to the grid electrode by the bias applying unit. | 06-24-2010 |
20120201553 | IMAGE FORMING APPARATUS - An image forming apparatus includes a rotatable image bearing member; a first charging member for electrically charging the image bearing member; a second charging member, provided downstream of the first charging member with respect to a rotational direction of the image bearing member, for electrically charging the image bearing member; an applying device for applying a voltage to the first charging member and the second charging member; a detecting device for a DC current passing through the second charging member; and a controller for controlling, when an AC voltage and a DC voltage are applied to the second charging member while a DC voltage is applied to the first charging member, the DC voltage applied to the second charging member so that an absolute value of the DC current detected by the detecting device is within a predetermined range. | 08-09-2012 |
20120224876 | IMAGE FORMING SYSTEM - An image forming system includes a first image forming station including a first toner image forming portion for transferring the toner image onto a sheet, and a first image heating portion; a second image forming station including a second toner image forming portion onto the sheet received from the first image heating portion, and a second image heating portion; a controller capable of executing an operation in a first mode in which a predetermined image formation in accordance with an inputted image forming condition is effected using the first and second image forming stations, a second mode in which it is effected without using the second image forming portion; and a temperature controller for the second image heating portion in the second mode so as to be smaller than a temperature of the second image heating portion in the first mode. | 09-06-2012 |
20120288290 | IMAGE FORMING SYSTEM - A multiply-connecting image forming system in which a second image forming apparatus forms an image on a recording material on which an image has been formed by a first image forming apparatus, the multiply-connecting image forming system suppressing degradation in quality of an output image when only the second image forming apparatus continues duplex image formation because the first image forming apparatus has run out of toner during the duplex image formation. | 11-15-2012 |
20130156450 | IMAGE FORMING APPARATUS - If the length of an adjustment toner image is longer than a circumferential length of a photosensitive member, a voltage which is less than a discharge start voltage is applied while a region of the photosensitive member irradiated with light by an optical sensor passes through a transfer portion. Further, a voltage which is greater than or equal to the discharge start voltage is applied while the photosensitive member rotates at least once after the region of the photosensitive member irradiated with light by the optical sensor passes through the transfer unit. As a result, density unevenness in the adjustment toner image and a potential change in the photosensitive member due to the optical sensor exposing the adjustment toner image are prevented. | 06-20-2013 |
20130156451 | IMAGE FORMING APPARATUS FOR ADJUSTING IMAGE FORMING CONDITIONS - An image forming apparatus in which an optical sensor for detecting an adjustment toner image of black color is disposed on an image bearing member and an optical sensor for detecting adjustment toner images of other colors is disposed on an intermediate transfer member. With this configuration, even if the adjustment toner images of black and other colors simultaneously pass through a transfer portion for black color to reduce downtime, it is possible to reduce an effect on the subsequent image caused by light irradiation from the optical sensor and, at the same time, to prevent adjustment toner images of other colors from being excessively retransferred to the image bearing member (for black color) due to discharge. Control is performed such that a voltage less than a discharge start voltage is applied. | 06-20-2013 |
20140044448 | CHARGING DEVICE - A grid of a charging device is cleaned without causing the grid to contact a member to be charged. In this structure, to suppress non-uniform charging due to wear of the grid, which is pulled toward a discharge electrode, for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the cleaning member. The second protective layer is provided on a surface of the base member that faces the pressing member. The second protective layer is thicker than the first protective layer. | 02-13-2014 |
20140044449 | CHARGING DEVICE - A shutter that suppresses accumulation of discharge products on a photosensitive member is disposed between a grid and the photosensitive member. In this structure, to suppress corrosion of the grid due to the discharge products for a long time, first and second protective layers are provided. The first protective layer is provided on a surface of a base member of the grid that faces the discharge electrode. The second protective layer is provided on a surface of the base member that faces the shutter. The second protective layer is thicker than the first protective layer. | 02-13-2014 |
Patent application number | Description | Published |
20090068557 | Battery Can and Method of Manufacturing the Same - To provide a battery can into which an electrode assembly can be housed smoothly without causing damage to the electrode assembly while ensuring the strength of the opening portion. In the battery can including a cylindrical side portion, a bottom, and an opening portion, the cylindrical side portion includes a first side portion formed at the bottom side, and a second side portion formed at the opening portion side. The thickness T | 03-12-2009 |
20090081536 | BATTERY CAN, BATTERY USING THE SAME, AND METHOD FOR MANUFACTURING THE SAME - A battery can is manufactured by drawing and ironing a nickel plated steel plate. The nickel plated steel plate includes a steel plate and a nickel plating layer made of nickel grains layered. Nickel grains present in a surface portion of the nickel plating layer are greater than nickel grains present in the vicinity of the interface with the steel plate. | 03-26-2009 |
20090145803 | ALKALINE BATTERY AND BATTERY PACK - A positive electrode and a gelled negative electrode are stored with a separator interposed therebetween in a battery case and an opening portion of the battery case is sealed with a gasket. The battery case is formed so that a thickness of a body portion thereof is smaller than a thickness of an opening portion thereof, the gasket includes a center portion, an outer circumference portion and a connection portion, an edge portion of the separator is in contact with the connection portion and bent toward the center portion and contact part of the edge portion with the connection portion has a length in a range of 1.5 mm to 2.5 mm, and the positive electrode contains at least manganese dioxide and graphite and a mixture ratio by weight of manganese dioxide and graphite is within a range of 92.6/7.4 to 94.0/6.0. | 06-11-2009 |
20090148763 | ALKALINE BATTERY AND BATTERY PACK - A positive electrode and a gelled negative electrode are stored with a separator interposed therebetween in a battery case and an opening portion of the battery case is sealed with a gasket. The battery case is formed so that a thickness of a body portion thereof is smaller than a thickness of an opening portion thereof, the gasket includes a center portion, an outer circumference portion and a connection portion, an edge portion of the separator is in contact with the connection portion and bent toward the center portion and contact part of the edge portion with the connection portion has a length in a range of 1.5 mm to 2.5 mm. Furthermore, part of the separator which is not in contact with the positive electrode and the connection portion has a length of 1.5 mm or less. | 06-11-2009 |
20090269661 | Battery Can and Method for Manufacturing the Same - A battery can of the present invention ensures a stable and favorable contact with an electrode and thus makes it possible to obtain a highly reliable battery excellent in high rate discharge characteristics. The battery can having an opening, including a cylindrical side portion and a bottom portion, of the present invention is formed from a steel plate. The steel plate has an Ni—Fe alloy layer on the inner face side of the battery can. The Ni—Fe alloy layer has an oxide layer containing iron and having a thickness of 10 to 50 nm on the inner face side of the battery can. | 10-29-2009 |
20110206983 | ALKALINE BATTERY - An alkaline battery including a positive electrode of a hollow cylindrical shape disposed in contact with an inner surface of a bottomed cylindrical battery case, a gelled negative electrode, a separator, and an alkaline electrolyte. The separator includes a cylindrical separator disposed in contact with the inner side surface of the positive electrode, and a bottom separator covering an opening of the cylindrical separator in the bottom side of the battery case. The bottom of the battery case includes: an annular base portion for supporting the positive electrode; an annular intermediate portion provided inwardly of the base portion, for supporting the bottom separator; and a terminal portion protruding outwardly from the intermediate portion. The intermediate portion has an inclined surface on the inner bottom surface of the battery case, the inclined surface being inclined downwardly from the base portion toward the terminal portion. | 08-25-2011 |
20120208051 | ALKALINE SECONDARY BATTERY - An alkaline secondary battery of the present invention includes: a cylindrical battery case | 08-16-2012 |
Patent application number | Description | Published |
20110199710 | SEMICONDUCTOR DEVICE - A semiconductor device includes, a high side drive circuit for controlling the high side power device and including a circuit load, a low side drive circuit for controlling the low side power device, a VCC terminal connected to the low side drive circuit and for supplying a VCC potential to the low side drive circuit, the VCC potential serving as a power supply potential to the low side drive circuit, a bootstrap diode connected at its anode to the VCC terminal and at its cathode to the high side drive circuit and used to produce a VB potential serving as a power supply potential to the high side drive circuit, and means for turning off the circuit load before the VB potential becomes lower than the VCC potential. | 08-18-2011 |
20130214822 | GATE DRIVE CIRCUIT - A gate drive circuit of the present invention is a gate drive circuit for driving an insulated gate switching element, which comprises a control drive circuit for applying a driving voltage to a control terminal of the switching element at a predetermined timing, and a voltage monitoring circuit for monitoring both a first voltage which is a power supply voltage of the control drive circuit and a second voltage which negatively biases the control terminal of the switching element, and in the gate drive circuit, the control drive circuit cuts off an output when at least one of the first and second voltages monitored by the voltage monitoring circuit becomes lower than a threshold value. It is an object of the present invention to provide an insulated gate switching element which can suppress wrong ON. | 08-22-2013 |
20150028925 | DRIVE CIRCUIT FOR SEMICONDUCTOR DEVICE - A drive circuit is provided with an input terminal for receiving input signals, an output terminal that outputs drive signals generated from the input signals, a control power supply terminal that receives a control power supply voltage, an output terminal that outputs an output signal, and a reset terminal that receives a reset signal. The output signal is given to a gate of a MOSFET. A secondary side circuit and a MOSFET constitute a step-down chopper circuit, which steps down a voltage through duty ratio control of the gate drive signal and generates a control power supply voltage. Upon receipt of a reset signal, the drive circuit stops outputting the drive signal and changes the output signal so as to reduce the control power supply voltage VCC. | 01-29-2015 |
Patent application number | Description | Published |
20120257198 | DETECTION DEVICE - A detection device includes an optical device, a suction section adapted to suck the fluid sample in the optical device, a light source adapted to irradiate the optical device with light, a light detection section adapted to detect light emitted from the optical device, and a control section adapted to perform drive control on the suction section. The optical device emits light reflecting the fluid sample to be adsorbed. The control section sets a suction flow velocity of the fluid sample on the optical device to V | 10-11-2012 |
20120274935 | DETECTION DEVICE - A detection device includes a sensor chip, a suction section adapted to suck a fluid sample to the sensor chip, a light source adapted to irradiate the sensor chip, a light intensity adjustment section adapted to adjust intensity of the light, a light detection section adapted to detect the light reflecting the sample adsorbed to the sensor chip, and a control section adapted to perform drive control on the suction section. The control section sets the suction flow velocity to V1 in the first mode in which the light detection section performs the detection, and sets the suction flow velocity to V2 (V2>V1) in the second mode. The light intensity adjustment section sets the light intensity to L1 in the first mode, and sets the light intensity to L2 (L2>L1) in the second mode. The first and second modes are switched based on the signal from the light detection section. | 11-01-2012 |
20140296721 | HEALTH MANAGEMENT DEVICE - A health management device includes: a signal output unit which outputs a start signal indicating a start timing when application of an exercise load on a subject is started; an acetone detection unit which detects an acetone concentration in a biogas of the subject; a clock unit which measures time; a storage unit which stores the start signal and the acetone concentration outputted from the acetone detection unit together with the time; and a display unit which displays a first transition data group of the acetone concentration outputted from the acetone detection unit before the start signal is received, and a second transition data group of the acetone concentration outputted from the acetone detection unit after the start signal is received, based on an output from the storage unit. | 10-02-2014 |