Mitsubishi Electric Corporation patent applications published on October 12th, 2023

Summary of the patent applications from Mitsubishi Electric Corporation on October 12th, 2023

Mitsubishi Electric Corporation has recently filed several patents for various technologies. These include a boost circuit for increasing voltage, a stator design for electric motors, a valve gas filter for gas-insulated devices, an ignition device for internal combustion engines, an optical semiconductor device, a solar cell structure, a coating process using a spiral liquid transport wind, a process for depositing metal on a GaN surface, a system for obtaining information based on speech recognition, and a system for generating virtual maps for transportation.

Notable applications of these technologies include:

• Boost circuit: Can be used in various electronic devices to increase voltage levels efficiently.
• Stator design: Enables smaller and more accurate temperature detection in electric motors, improving their performance and reliability.
• Valve gas filter: Ensures clean insulating gas is used in gas-insulated devices, preventing potential damage from foreign particles.
• Ignition device: Helps prevent creeping discharge in internal combustion engines, improving their efficiency and reliability.
• Optical semiconductor device: Can be used in various applications such as optical communication systems or optical sensors.
• Solar cell structure: Enhances the efficiency of solar cells by optimizing the absorption of light.
• Coating process: Provides a reliable and efficient method for applying coatings to semiconductor elements.
• GaN surface plating: Enables the formation of metal films on GaN surfaces using an electroless plating process.
• Speech recognition system: Allows for the control of equipment and functions through speech, improving user experience and accessibility.
• Virtual map generation: Facilitates efficient transportation planning by generating virtual maps based on the number of vehicles and loads in an area.

Overall, Mitsubishi Electric Corporation's recent patent filings demonstrate their commitment to developing innovative technologies in various fields, including electronics, energy, and transportation. These technologies aim to improve efficiency, reliability, and performance in a wide range of applications.

Patent applications for Mitsubishi Electric Corporation on October 12th, 2023

HAND DRYER AND HAND-DRYING SYSTEM (18043388)

Main Inventor

Yohei ASAHI

Brief explanation

This abstract describes a hand dryer that has a section where you can insert your hands. It has a blower that can either blow air into the hand insertion space or suck air out of it. The hand insertion space is also irradiated with ultraviolet light generated by a light source.

Abstract

A hand dryer includes a hand insertion section, a blower, and a UV irradiator. The hand insertion section defines a hand insertion space. The hand insertion section has an air hole that opens to the hand insertion space. The blower is in fluid communication with the air hole. The blower is configured to blow air from the air hole into the hand insertion space or to suck air from the hand insertion space into the air hole. The UV irradiator irradiates the hand insertion space with ultraviolet light generated by a light source.

LASER MACHINING APPARATUS (18020624)

Main Inventor

Kyohei ISHIKAWA

Brief explanation

The abstract describes a laser machining apparatus that includes an actuator to control the positioning of a machining head and a workpiece. A control unit manages the laser oscillator, machining head, and actuator based on a machining parameter. A machining state observation unit detects light intensities in different wavelength bands from the workpiece using optical sensor signals. A feature extraction unit extracts features from the correlation between the optical sensor signals and one of the signals. A correction quantity calculation unit determines the correction parameter and quantity for the machining parameter based on the extracted features.

Abstract

A laser machining apparatus includes an actuator that changes relative positions of a machining head and a workpiece; a control unit that controls in machining execution the laser oscillator, the machining head, and the actuator based on a machining parameter; a machining state observation unit that detects, from process light that is light generated from the workpiece by laser beam irradiation, light intensities in a plurality of predetermined wavelength bands as a plurality of optical sensor signals; a feature extraction unit that extracts at least one of features, the features being obtainable from an index of correlation between the plurality of optical sensor signals and from one of the optical sensor signals; and a correction quantity calculation unit that determines the machining parameter to be corrected as a correction parameter and a correction quantity for the correction parameter based on the at least one of the features.

ADDITIVE MANUFACTURING METHOD, ADDITIVE MANUFACTURING APPARATUS, AND ADDITIVE MANUFACTURING SYSTEM (18024516)

Main Inventor

Nobuhiro SHINOHARA

Brief explanation

This abstract describes a method of additive manufacturing, also known as 3D printing. The method involves measuring the temperature of the object being processed and using that data to correct the commands given to the printer. These commands include supplying the material, providing a heat source to melt the material, moving the printer head, and supplying a shielding gas. Overall, this method aims to improve the accuracy and quality of the 3D printing process.

Abstract

An additive manufacturing method includes a step of measuring a temperature of an object of processing or a shaping material and outputting temperature data, a step of correcting basic commands based on a basic processing program and the temperature data, and determining post-correction commands including a material supply command, a heat source supply unit command, a drive command, and a gas supply command, a step of supplying the shaping material to a processing position of a shaped article based on the material supply command, a step of supplying a heat source to melt the shaping material supplied to the processing position based on the heat source supply unit command, a step of changing the relative position between the processing position and the shaped article based on the drive command, and a step of supplying, to the processing position, a shielding gas based on the gas supply command.

VEHICLE CONTROL APPARATUS (18159131)

Main Inventor

Tomoki UNO

Brief explanation

The abstract describes a vehicle control apparatus that can effectively control the speed of a vehicle when traveling on a curve. The apparatus takes into account both the lateral acceleration (sideways movement) and the longitudinal acceleration (forward or backward movement) of the vehicle. 

The apparatus calculates a maximum speed for traveling on the curve based on the shape of the road and the maximum lateral acceleration. It then adjusts this speed to ensure that the overall acceleration of the vehicle, considering both lateral and longitudinal acceleration, stays within a predetermined limit range.

Finally, the apparatus controls the vehicle's speed according to the adjusted maximum speed for traveling on the curve.

Abstract

To provide a vehicle control apparatus which can control appropriately the travelling speed at traveling on the curve, considering not only the lateral acceleration at traveling on the curve but also the longitudinal acceleration. A vehicle control apparatus calculates a curve limitation travelling speed at which the lateral acceleration of the own vehicle becomes the maximum lateral acceleration or less, based on the road shape and the maximum lateral acceleration; corrects the curve limitation travelling speed so that a composite acceleration of the own vehicle at traveling on the curve road becomes within a limit range which is set according to the maximum lateral acceleration, the maximum longitudinal acceleration in the front direction, and the maximum longitudinal acceleration in the back direction; and controls the vehicle according to the curve limitation travelling speed after correction.

VEHICLE CONTROL APPARATUS (18158817)

Main Inventor

Kenta TOMINAGA

Brief explanation

The abstract describes a vehicle control system that can accurately determine if it is possible for a vehicle to change lanes without interfering with obstacles. This system calculates a target trajectory for lane changing while avoiding restricted areas. It then determines if lane changing is possible based on the vehicle's position in the target trajectory. If it is determined to be possible, the system guides the vehicle to change lanes using the target trajectory. This system aims to improve driver comfort and safety during lane changing maneuvers.

Abstract

There is provided a vehicle control apparatus that can correctly determine that lane changing is possible in a situation that by accelerating or decelerating, an ego vehicle can perform the lane changing without interfering with an obstacle, and that raises the comfortability for the drier. In the vehicle control apparatus, a target trajectory for performing lane changing under restriction of not entering an entry prohibition region is calculated; a determination section determines whether or not lane changing is possible, based on at least information on a position of the ego vehicle in the target trajectory; in the case where it is determined that lane changing is possible, the ego vehicle is made to change a lane, by use of the target trajectory.

LINEAR TRANSPORT APPARATUS (18035932)

Main Inventor

Takuma NAKAMURA

Brief explanation

The abstract describes a linear transport apparatus that consists of a transport cart, two rollers, and a rail. The first roller rotates around a shaft in one direction, while the second roller rotates around a shaft at an angle to the first shaft. The rail is positioned between the rollers and runs along a track for the transport cart to move on. The rail has two contact portions - one that restricts the movement of the cart in a perpendicular direction to the rail, and another that is parallel to the second roller's shaft. Additionally, the rail has sections with different curvatures in the track.

Abstract

A linear transport apparatus includes a transport cart, a first roller that rotates about a first rotation shaft extending from the transport cart along a first direction, a second roller that rotates about a second rotation shaft extending from the transport cart and forming an acute angle with the first rotation shaft, and a rail sandwiched between the first and second rollers to extend along a track on which the transport cart moves. The rail includes a first contact portion coming contact with the first roller and restricting movement of the transport cart in a second direction perpendicular to a direction in which the rail extends and the first direction, and a second contact portion that comes into contact with the second roller and is parallel to the second rotation shaft, and the rail includes a portion in which curvature of the track moves is different from another portion.

MOTOR CONTROL DEVICE AND ELECTRIC POWER STEERING DEVICE (17795096)

Main Inventor

Haruna KOYAMA

Brief explanation

The abstract describes a motor control device that aims to reduce the unpleasant sensation caused by vibration or noise in a motor. This device consists of two control units, one for each motor winding. The first control unit determines the lower value between its own power supply voltage and the power supply voltage of the second control unit. It then outputs this selected power supply voltage and calculates target values for the d-axis current, q-axis voltage, and d-axis voltage using this selected power supply voltage.

Abstract

A motor control device that enables a reduction of an unpleasant sensation caused by vibration or noise occurring in a motor is obtained. A motor control device including a first control unit that drives a first motor winding and a second control unit that drives a second motor winding is such that the first control unit selects the lower of values of an own power supply voltage and a power supply voltage of the second control unit and outputs a post-selection power supply voltage, and computes a target d-axis current, a target q-axis voltage, and a target d-axis voltage using the post-selection power supply voltage.

CENTRIFUGAL AIR-SENDING DEVICE AND AIR-CONDITIONING APPARATUS (18044091)

Main Inventor

Takuya TERAMOTO

Brief explanation

The abstract describes a centrifugal air-sending device with blades that have different lengths in two regions. The blades are designed in such a way that the turbo vane portion is larger than the sirocco vane portion in both regions. The blades closer to the outer circumference have a thinner vane thickness that decreases from the inner circumference towards the outer circumference.

Abstract

A centrifugal air-sending device has blades that each have a vane length in a first region that is greater than a vane length in a second region, and are each formed such that a proportion for which a turbo vane portion accounts is higher in a radial direction than a proportion for which a sirocco vane portion accounts in the first region and the second region. The blades that are located closer to an outer circumference than is a blade inner diameter of inner circumferential ends of the blades at end portions of the blades that are close to a side plate in an axial direction are defined as a blade outer circumferential portion that is formed such that a vane thickness of each of the blades in decreased in the radial direction from an inner circumference toward the outer circumference.

AIR CONDITIONER AND AIR CONDITIONING SYSTEM (18024279)

Main Inventor

Kenta KINEMUCHI

Brief explanation

This abstract describes an air conditioner that has the ability to detect temperature information in a specific area and use that information to generate thermal distribution patterns. It also has the capability to store user settings, including temperature preferences and user positions within the area. The air conditioner then uses this information to control the direction and intensity of the air blow.

Abstract

An air conditioner includes processing circuitry to acquire a result of detecting temperature information in a region; to generate thermal distribution information in the region from the temperature information; to generate reference thermal distribution information in the region; to acquire user setting information which includes user information previously assigned to a user and either temperature setting information or relative temperature setting information in each position in the region specified by the user; to store user position information in which the user information and a staying position of the user in the region are associated with each other in a storage; and to control air blow using the user setting information and the user position information.

FAILURE DIAGNOSIS APPARATUS, TRAINING APPARATUS, TRAINING METHOD, AND FAILURE DIAGNOSIS SYSTEM (18042506)

Main Inventor

Yasuhiko WADA

Brief explanation

The abstract describes a failure diagnosis apparatus that is used to detect and notify users of any failures in a motor. The apparatus includes a controller, a wear estimator, and a failure notification unit. The controller is responsible for controlling the motor's drive, while the wear estimator estimates the amount of wear on the motor's bearing based on the current flowing through it. The failure notification unit then diagnoses any failures in the motor based on the estimated wear and notifies the user. During the estimation process, the controller ensures that the motor is driven in a constant state.

Abstract

A failure diagnosis apparatus includes a controller to control drive of a motor, a wear estimator to estimate an amount of wear of a bearing of the motor based on a current that flows in the motor, and a failure notification unit to diagnose a failure of the motor based on the amount of wear of the bearing of the motor estimated by the wear estimator and to notify a user. When the wear estimator estimates the amount of wear of the bearing of the motor, the controller controls drive of the motor such that the motor is driven in a constant state.

RADAR DEVICE AND RADAR SYSTEM (18210843)

Main Inventor

Kentaro ISODA

Brief explanation

The abstract describes a radar device that has a filter capable of suppressing signals of the same frequency channel as the transmission signal while allowing signals of different frequency channels to pass through. This filter is used when the device sends out a transmission signal through an antenna.

Abstract

A radar device includes a suppression band variable filter that, while a circulator outputs any one transmission signal out of a plurality of transmission signals to an antenna, and the antenna transmits the transmission signal, suppresses a signal of the same frequency channel as a frequency channel of the transmission signal, and passes a signal of a frequency channel different from the frequency channel of the transmission signal.

CONTROL SYSTEM, LOCAL DEVICE, AND REMOTE DEVICE (18210131)

Main Inventor

Koki IGAWA

Brief explanation

The abstract describes a control system that includes a state machine and an execution control unit. The state machine is responsible for transitioning between different states, each of which can have either a remote control attribute or a local control attribute. The execution control unit is responsible for generating an output value for a control target device. If the current state of the state machine has the remote control attribute, the execution control unit causes a remote device in a remote environment to generate the output value. If the current state has the local control attribute, the execution control unit causes a local device in a local environment to generate the output value.

Abstract

A control system () includes a state machine () to make a state transition among a plurality of states each set with either of a remote control attribute and a local control attribute as an attribute; and an execution control unit () to cause a remote device () in a remote environment for a control target device () to perform an output value generating process of generating an output value to the control target device (), when the attribute of a current state of the state machine () is the remote control attribute, and to cause a local device () in a local environment for the control target device () to perform the output value generating process, when the attribute of the current state of the state machine () is the local control attribute.

CONTROL MANAGEMENT DEVICE (18024968)

Main Inventor

Tatsuya NAGATANI

Brief explanation

The present disclosure describes a control management device that includes various components for managing jobs. These components include a job input unit for inputting a job, a controller exclusive determination unit for determining if the controller is locked due to an ongoing exclusive process, a parameter value storage for storing the original data value and locking the controller when the next instruction is a writing process, an instruction execution unit for notifying the controller of the next instruction, a job completion determination unit for determining if all instructions in the job have been completed, and a parameter value restoration unit for restoring the original data value to the controller.

Abstract

The present disclosure relates to a control management device including a job input unit into which a job is input, a controller exclusive determination unit configured to determine whether or not the controller which is a target of an instruction included in the job is locked due to an ongoing exclusive process by another job, a parameter value storage configured to, when an instruction to be executed next is writing of an exclusive process, store a value of writing target in the controller as an original data value and lock the controller, an instruction execution unit configured to notify the controller of the instruction to be executed next in the job, a job completion determination unit configured to determine whether or not all instructions in the job have been completed, and a parameter value restoration unit configured to restore the original data value to the controller.

FAILURE SYMPTOM DETECTION SYSTEM, FAILURE SYMPTOM DETECTION METHOD, AND RECORDING MEDIUM (18044469)

Main Inventor

Tatsuki NAKAMURA

Brief explanation

This abstract describes a system that detects failure symptoms in Internet of Things (IoT) devices. The system collects and stores field data from multiple IoT devices. It then extracts features from this data based on reports of failures in a user's facility. The system also accumulates information about previous failures and their associated content. Finally, it monitors the field data and, when it detects feature data that matches the accumulated data, it outputs a notification indicating the detection of a symptom related to the failure.

Abstract

A failure symptom detection system includes a first storage to collect and store field data of each of a plurality of Internet of things devices, a feature extractor to acquire feature data of the field data based on a report on a failure in a service as a feeling of a user of a facility, a second storage to accumulate a failure at an occurrence of the failure associated with content of the failure as the feeling of the user, and a failure symptom detector to monitor the field data stored in the first storage, and produce, upon detecting feature data matching the feature data accumulated in the second storage, output indicating detection of a symptom of the failure associated with the feature data.

IMAGE SYNTHESIS DEVICE, IMAGE SYNTHESIS METHOD, AND STORAGE MEDIUM STORING PROGRAM (18210310)

Main Inventor

Kento YAMAZAKI

Brief explanation

The abstract describes an image synthesis device that can blend multiple images together to create a seamless composite image. The device selects adjacent images, calculates the overlap region where they overlap, determines a boundary line within the overlap region, and blends the images together. If one of the images has a priority region, the device determines a boundary line that avoids overlapping with the blend region near the priority region. The blending process is then executed based on this boundary line.

Abstract

An image synthesis device includes processing circuitry to acquire a plurality of images captured from different viewpoints and to select images adjoining each other from the plurality of images; to calculate an overlap region as a region where the adjoining images overlap with each other; to determine a boundary line between images in the overlap region; and to execute blending of images in the overlap region. When at least one of the adjoining images includes a priority region, the processing circuitry determines the boundary line that does not overlap with a blend region in a vicinity of the priority region as a region determined depending on a blending method used for blending of an image of the priority region, and the processing circuitry executes the blending of the images in the overlap region based on the boundary line.

SENSOR NOISE REMOVAL DEVICE AND SENSOR NOISE REMOVAL METHOD (18043506)

Main Inventor

Hiroyoshi SHIBATA

Brief explanation

This abstract describes a system that acquires sensor data related to the surroundings of a vehicle. It includes a unit that determines whether there is noise in the acquired sensor data, and another unit that replaces the noisy portion of the data with estimated data where the noise does not occur. The system aims to improve the accuracy and reliability of the sensor data by removing noise.

Abstract

A sensor data acquiring unit that acquires sensor data related to a surrounding situation of a vehicle, a noise determination unit that determines whether or not noise occurs in the sensor data acquired by the sensor data acquiring unit, and a data replacement unit that estimates, for the sensor data in which it is determined by the noise determination unit that the noise occurs, sensor data in which the noise does not occur, thereby generates replacement data corresponding to a noise portion, and replaces the noise portion with the replacement data generated are included.

WORK ESTIMATION DEVICE, WORK ESTIMATION METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM (18210948)

Main Inventor

Keishi NISHIKAWA

Brief explanation

The abstract describes a device that estimates the work being done by a user. It includes a unit that estimates the region the user is watching, a unit that detects the work object and target candidate objects from a video, a unit that calculates the degree of contact between the work object and each target candidate object based on the user's line of sight, and a unit that estimates the user's work based on the work object and contact degree.

Abstract

A work estimation device () includes a watching region estimation unit (), an object detection unit (), a contact degree calculation unit (), and a work estimation unit (). The watching region estimation unit () estimates a watching region which is a region a user watches, with using information indicating a line of sight of the user. The object detection unit () detects, from a video that shows a work object the user is using and at least one target candidate object which is a candidate for a work target of the user, the work object and the at least one target candidate object. The contact degree calculation unit () calculates a contact degree indicating a degree of contact between the work object and each target candidate object which is included in the at least one target candidate object, on a basis of the watching region. The work estimation unit () estimates work of the user on a basis of the work object and the contact degree.

IN-VEHICLE MONITORING DEVICE, IN-VEHICLE MONITORING SYSTEM, AND IN-VEHICLE MONITORING METHOD (18022339)

Main Inventor

Taro KUMAGAI

Brief explanation

The abstract describes an in-vehicle monitoring device that can detect occupants and objects in a vehicle using in-vehicle information. It includes units to determine if it is the first ride for an occupant or object, and if a notification object is left behind. The device can determine the necessity of notification based on certain conditions. If it is the first ride, a relaxed condition is used compared to subsequent rides.

Abstract

An in-vehicle monitoring device includes: an in-vehicle information acquisition unit to acquire in-vehicle information; an occupant detection unit and a notification object detection unit to detect an occupant in a vehicle and a notification object in the vehicle, respectively, using the in-vehicle information; a first ride determination unit to determine whether ride of the occupant or the notification object in the vehicle is a first ride; a left-behind determination unit to determine whether the notification object is left behind; and a notification control unit to determine that notification is necessary when a first condition is satisfied in a case where it is determined that the notification object is left behind. In a case where the ride is a first ride, the notification control unit determines necessity of notification using a second condition relaxed as compared with the first condition in a case where the ride is not a first ride.

TRAFFIC MANAGEMENT APPARATUS, TRAFFIC MANAGEMENT METHOD, AND COMPUTER READABLE MEDIUM (18208942)

Main Inventor

Masaaki TAKEYASU

Brief explanation

The abstract describes a system that generates a virtual map of an area based on the number of vehicles and loads scheduled to travel in that area. The system divides the area into smaller sections, each corresponding to a specific role or function. The virtual map is then distributed to the vehicles traveling in the area.

Abstract

A virtual map generation unit () generates a virtual map of a subjected area by dividing the subjected area into role areas each of which corresponds to each of a plurality of roles, based on the number of vehicles scheduled to travel in the subjected area specified from work plan information on a transportation work of loads by a vehicle and based on the number of loads scheduled to be placed in the subjected area specified from the work plan information. A distribution unit () distributes to the vehicle traveling in the subjected area, the virtual map generated by the virtual map generation unit ().

EQUIPMENT CONTROL DEVICE AND EQUIPMENT CONTROL METHOD (17486910)

Main Inventor

Masato HIRAI

Brief explanation

This abstract describes a system that obtains equipment and function information based on speech recognition. The system includes a unit that determines whether the time from utterance to performance of a target function is long. If the time is long, the system determines a first response sentence related to the target equipment and outputs this information.

Abstract

There are included an equipment and function information obtaining unit that obtains equipment and function information in which target equipment is associated with a target function to be performed by the target equipment, the target equipment and the target function being determined on the basis of a result of speech recognition; a time determining unit that determines whether or not time from utterance to performance of the target function is long; a response sentence determining unit that determines a first response sentence related to the target equipment, on the basis of the equipment and function information obtained by the equipment and function information obtaining unit, when the time determining unit determines that the time from utterance to performance of the target function is long; and an output control unit that outputs information indicating the first response sentence determined by the response sentence determining unit.

SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME (18040927)

Main Inventor

Koichiro NISHIZAWA

Brief explanation

The abstract describes a process where a substrate with a GaN surface is placed in a solution containing potassium hydroxide and a catalyst metal salt. Ultraviolet light is used to deposit a catalyst metal onto the GaN surface. Then, a metal film is formed on the GaN surface using electroless plating.

Abstract

A substrate () having a GaN surface () is immersed in a catalyst metal solution () containing potassium hydroxide and a plating catalyst metal salt while being irradiated with ultraviolet light to deposit a catalyst metal () on the GaN surface (). A metal film () is formed on the GaN surface () having the catalyst metal () deposited thereon by electroless plating.

METHOD FOR MANUFACTURING SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE (18146283)

Main Inventor

Daisuke MURATA

Brief explanation

The abstract describes a process for coating a semiconductor element and a wire bonded to it using a nozzle. The nozzle generates a spiral liquid transport wind, which directs the coating liquid towards the target structure. After the coating is applied, a drying process is performed to form a primary layer containing a silane coupling agent on the wire's outer periphery.

Abstract

A coating process of a coating liquid using a nozzle is performed on a coating target structure including a semiconductor element and a wire bonded to the semiconductor element by a wire bonding process. The nozzle has a transport wind generating function of generating a liquid transport wind in a spiral manner. Thus, the coating liquid discharged from the coating liquid supply port of the nozzle is supplied to the coating target structure along the directivity of the liquid transport wind. Then, a drying process is performed on the coating target structure to form a primary layer containing a silane coupling agent as a constituent material on an outer periphery of the wire.

AVALANCHE PHOTO DIODE (18040179)

Main Inventor

Harunaka YAMAGUCHI

Brief explanation

The abstract describes the structure of a semiconductor device, specifically a solar cell. It consists of several layers stacked on a semiconductor substrate. These layers include a buffer layer, a multiplication layer, a light-absorbing layer, a window layer, and a contact layer.

The window layer is doped with an impurity to create a p-type region. The bandgap of the window layer is larger than the bandgap of the light-absorbing layer. This means that the window layer allows certain wavelengths of light to pass through while absorbing others.

The window layer is composed of two layers: a first window layer and a second window layer. The second window layer has a higher diffusion rate for the impurity compared to the first window layer. This means that the impurity will spread more easily in the second window layer.

The first window layer is made of either Ru, Rh, or Os-doped InP (indium phosphide). These materials are used to enhance the performance of the solar cell.

Abstract

A buffer layer (), a multiplication layer (), a light-absorbing layer (), a window layer (), and a contact layer () are sequentially stacked on a semiconductor substrate (). The window layer () is doped with an impurity to form a p-type region (). A bandgap of the window layer () is greater than a bandgap of the light-absorbing layer (). The window layer () includes a first window layer (), and a second window layer () formed on the first window layer (). A diffusion rate of the impurity in the second window layer () is higher than a diffusion rate of the impurity in the first window layer (). The first window layer () is a Ru, Rh or Os-doped InP layer.

OPTICAL SEMICONDUCTOR DEVICE (18044193)

Main Inventor

Ryoko SUZUKI

Brief explanation

The abstract describes an optical semiconductor device that includes several components. These components include a ridge structure on a semiconductor substrate, a buried layer on the sides of the ridge structure, a second cladding layer and contact layer on top of the ridge structure, a mesa structure reaching from the contact layer to the substrate, a heat dissipation layer on the contact layer, a protective film on the sides of the mesa structure and the ends of the contact layer, and an electrode connected to the contact layer.

Abstract

An optical semiconductor device of the present disclosure comprises: a ridge structure formed on a first-conductivity-type semiconductor substrate; a buried layer buried on both side surfaces of the ridge structure; a second-conductivity-type second cladding layer and a second-conductivity-type contact layer laminated on the top of the ridge structure and the surface of the buried layer; a stripe-shaped mesa structure formed of a mesa reaching from the second-conductivity-type contact layer to the first-conductivity-type semiconductor substrate; a heat dissipation layer formed on the surface of the second-conductivity-type contact layer; a mesa protective film covering both side surfaces of the mesa structure and both end portions of the surface of the second-conductivity-type contact layer; and a second-conductivity-type-side electrode electrically connected to the second-conductivity-type contact layer.

IGNITION DEVICE (18156488)

Main Inventor

Kimihiko TANAYA

Brief explanation

This abstract describes an ignition device for a spark ignition-type internal combustion engine. The device aims to prevent a phenomenon called creeping discharge, which can occur when the air-fuel mixture in the combustion chamber reaches high pressure. The ignition device includes an ignition plug with a high-voltage side electrode and a ground side electrode. It also includes a high voltage generation device that applies voltage to the high-voltage side electrode, and an extension device that prolongs the time it takes for the voltage between the high-voltage side electrode and the ground side electrode to reach a dielectric breakdown voltage. This ignition device helps improve the efficiency of the internal combustion engine.

Abstract

An object herein is to provide, with respect to a spark ignition-type internal combustion engine in which the pressure of the air-fuel mixture in the combustion chamber becomes high, an ignition device which can suppress occurrence of a creeping discharge and thus contributes to highly efficient operation of the internal combustion engine. The ignition device according to this application includes: an ignition plug having a high-voltage side electrode and a ground side electrode; a high voltage generation device that applies a voltage to the high-voltage side electrode of the ignition plug; and an extension device that extends a dielectric breakdown-reaching time period that is a time period from when the voltage is applied to the high-voltage side electrode of the ignition plug, to when a voltage between the high-voltage side electrode and the ground side electrode of the ignition plug reaches a dielectric breakdown voltage.

VALVE GAS FILTER AND GAS-INSULATED SWITCHGEAR (18042348)

Main Inventor

Kazuya KATAYAMA

Brief explanation

The abstract describes a valve gas filter that is used in a gas-insulated device. The filter is designed to allow the passage of insulating gas while preventing any foreign matter from entering the device. It consists of a valve box attached to the device and a valve body that moves within the box to open and close the gas passage. The valve body contains a gas filter made of a porous insulating material. This filter ensures that only clean insulating gas flows through the device, enhancing its performance and preventing any damage caused by contaminants.

Abstract

A valve gas filter includes: a valve box attached to a gas enclosing port connected to a gas-insulated device to be filled with an insulating gas and hermetically sealed; and a valve body that opens and closes a gas passage by moving in the valve box, in which the valve body includes a gas filter, which is formed by a porous insulating material and allows passage of an insulating gas but does not allow passage of foreign matter contained in the insulating gas.

STATOR AND ROTARY ELECTRIC MACHINE USING SAME (18091613)

Main Inventor

Jumpei YASUTOMI

Brief explanation

The abstract describes a stator, which is a component in an electric motor, that has been designed to minimize size increase in one direction and improve temperature detection accuracy. The stator includes a cylindrical core, coil conductors, connection wires, and a temperature sensor. The connection wires are arranged in a circumferential direction and connect the coil conductors. Some of the connection wires are spaced apart in the axial direction, creating an interval where the temperature sensor is located and held between the connection wires.

Abstract

Provided is a stator in which size increase in the radial direction is suppressed and accuracy of temperature detection is improved. The stator includes: a cylindrical stator core; a plurality of coil conductors each having a coil body located in a slot of the stator core and a conductor end protruding from the stator core; a plurality of connection wires extending in a circumferential direction of the stator core and connecting the conductor ends separated from each other in the circumferential direction; and a temperature sensor, wherein at least two of the connection wires have parts arranged with an interval therebetween in an axial direction of the stator core, and the temperature sensor is located in the interval and held between the connection wires on both sides in the axial direction.

BOOST CIRCUIT AND VOLTAGE GENERATION DEVICE (18042417)

Main Inventor

Yohei ARAKI

Brief explanation

The abstract describes a boost circuit that increases voltage using several capacitors and diodes placed on an insulated substrate. The insulated substrate is divided into multiple sections, and at least one capacitor or diode is positioned between these sections, crossing an insulation layer.

Abstract

A boost circuit that boosts a voltage using multiple capacitors and multiple diodes disposed on an insulated substrate, where the insulated substrate is divided into multiple insulated substrates, and at least one of the multiple capacitors or the multiple diodes is disposed between the insulated substrates to cross an insulation layer between the insulated substrates.