Abstract: A vehicular visual recognition device, including: an imaging section that, from outside a vehicle, captures plural vehicle exterior capture images in which portions of the images overlap with each other; and a controller that effects control such that an image of a vehicle body portion of a vehicle cabin image set to a predetermined transmissive state overlaps with at least part of an overlapping portion of the plural vehicle exterior capture images, and such that the plural vehicle exterior capture images and the vehicle cabin image are combined and displayed at a display section.

Abstract: There is provided a viewing device for a vehicle, including: an imaging portion that captures an image of a rear of a vehicle from a vehicle exterior; and a display portion that carries out image processing that combines a first captured image that has been captured by the imaging portion and a second captured image that shows a vehicle cabin interior in which a vehicle rear including the vehicle cabin interior is captured from the vehicle cabin interior, such that a region of a rear side window glass becomes longer than an apparent width of the rear side window glass that is actually seen from a position of capturing the second captured image, and displays the images.

Abstract: A detection device for use with a master device is provided. The detection device includes an electric power source that is intermittently driven to generate electric power, a detector switched between a number of states by occurrence of a predetermined event or a predetermined state, an electric power accumulator that is charged or discharged by switching the state of the detector, and a controller powered by the electric power source. The controller is configured to determine the state of the detector and notify the master device of detection information corresponding to the state of the detector. Activation of the controller powered by the electric power source is followed by acknowledgment of the state of the detector by the controller based on a state of the electric power accumulator.

Abstract: A receiver includes an internal antenna installed on a substrate and capable of receiving a wireless signal, and an external antenna connected to a connector, which is arranged on the substrate, and capable of receiving the wireless signal. A demodulator is arranged on the substrate and demodulates the wireless signals received through the internal antenna and the external antenna. An applying circuit is arranged on the substrate and applies a voltage to the external antenna via the connector. A disconnection detector is arranged on the substrate and detects whether the external antenna is disconnected based on a voltage or current applied by the applying circuit. The internal antenna forms a part of the applying circuit.

Abstract: Each of a plurality of tire air pressure detectors includes an information retention portion that retains one or more pieces of timing information indicating the time at which the tire air pressure detector has rotated to a specific detector angle in a first time band for withholding transmission of a radio wave signal, and a radio wave transmission control portion that transmits one or more of the pieces of timing information retained in the information retention portion to a receiver in a second time band enabling transmission of the radio wave signal. The receiver includes an axle rotation amount reader portion that receives axle rotation amount information generated in each of a plurality of axle rotation detection portions, and a position determination portion that calculates an axle rotation amount at the point in time at which the tire air pressure detectors have rotated to the specific detector angle.

Abstract: An antenna device includes an antenna. The antenna includes a plurality of plate-like legs, coupled to a base plate, and a plurality of plate-like arms, supported by the legs. Adjacent ones of the arms are continuous with each other. At least two of the legs have thicknesses in different thickness-wise directions.

Abstract: A tire position determination system includes a tire pressure detector attached to each tire to generate a tire pressure signal. An acceleration detector generates gravitational information for each tire pressure detector. A receiver arranged in a vehicle body receives the tire pressure signal from each tire pressure detector. An axle rotation amount detector detects an axle rotation amount of an axle corresponding to each tire and generates pulses indicative of the detected axle rotation amount. An automatic locator determines the position of each tire based on the gravitational force and the pulses. A pulse combination determination unit determines whether or not a combination of the pulses from the axle rotation amount detectors is appropriate. A pulse acquisition timing setting unit sets an acquisition timing of the pulse signal for the automatic locator based on the determination of the pulse combination determination unit.

Abstract: A travelling state determination unit of a tire pressure detector determines a travelling state of a vehicle based on a gravitational component force detected by an acceleration sensor. An operation mode switching unit of the tire pressure detector switches the operation mode of the tire pressure detector from a pressure determination mode to an automatic locating mode when the vehicle speed become lower than a threshold value. An interval of period transmission of radio waves in the automatic locating mode is set to be shorter than an interval of the periodic radio wave transmission in the pressure determination mode.

Abstract: A tire position determination system including tire pressure detectors respectively attached to tires, axle rotation detectors respectively corresponding to axles, and a receiver located on a vehicle body. Each tire pressure detector detects when reaching a specific position on a rotation trajectory of the corresponding tire and transmits a radio wave including the tire ID. An ID temporary registration unit temporarily registers tire IDs to the memory that are received from the tire pressure detectors existing in a signal receivable area of the receiver. An ID registration acquires axle rotation information from each axle rotation detector whenever receiving the radio wave from each tire pressure detector, and specifies a tire ID of a tire that rotates in synchronism with rotation of each axle to determine the tire position of the tire.

Abstract: Each tire pressure detector detects a characteristic point in a detection signal of an acceleration sensor indicating that the tire pressure detector is located at a certain rotation position. When detecting the characteristic point, the tire pressure detector transmits a notification signal including the detector ID. Whenever a receiver receives a notification signal, the receiver acquires an axle rotation amount of a representative wheel and stores the axle rotation amount in a memory in association with the detector ID in the notification signal. After acquiring axle rotation amounts associated with the detector IDs of all of the tire pressure detectors, the receiver determines mounting positions of tires from the angle each tire pressure detector rotated and the angle each axle rotated between a first determination timing and a second determination timing.

Abstract: A wireless communication system for a vehicle has a portable device that transmits a wireless signal and a vehicle-mounted device that receives the wireless signal from the portable device. Each time a switch in the portable device is turned on, the portable device updates a portable device rolling code and transmits a wireless signal including the portable device rolling code. The vehicle-mounted device receives the wireless signal through a receiver and authenticates the portable device through comparison between the portable device rolling code included in the wireless signal and the vehicle rolling code. The vehicle-mounted device locks or unlocks the vehicle door if the portable device is authenticated.

Abstract: A receiver includes an internal antenna installed on a substrate and capable of receiving a wireless signal, and an external antenna connected to a connector, which is arranged on the substrate, and capable of receiving the wireless signal. A demodulator is arranged on the substrate and demodulates the wireless signals received through the internal antenna and the external antenna. An applying circuit is arranged on the substrate and applies a voltage to the external antenna via the connector. A disconnection detector is arranged on the substrate and detects whether the external antenna is disconnected based on a voltage or current applied by the applying circuit. The internal antenna forms a part of the applying circuit.

Abstract: A tire position determination system includes a tire pressure detector coupled to a tire. A tire position determination unit locates the tire pressure detector and determines a mounting position of the tire. A gravitational component force detection unit generates gravitational force information of the tire pressure detector. A characteristic value acquisition unit acquires the angle of the tire pressure detector from the gravitational force information. The characteristic value acquisition unit acquires a first characteristic value of the tire pressure detector when a drive source of the vehicle is stopped and a second characteristic value of the tire pressure detector when the drive source is started. A characteristic value comparator compares the first and characteristic values. An operation control unit determines whether the mounting position of the tire has been changed based on the comparison and controls the tire pressure monitoring unit accordingly.

Abstract: A tire position determination system including tire pressure detectors respectively attached to tires, axle rotation detectors respectively corresponding to axles, and a receiver located on a vehicle body. Each tire pressure detector detects when reaching a specific position on a rotation trajectory of the corresponding tire and transmits a radio wave including the tire ID. An ID temporary registration unit temporarily registers tire IDs to the memory that are received from the tire pressure detectors existing in a signal receivable area of the receiver. An ID registration acquires axle rotation information from each axle rotation detector whenever receiving the radio wave from each tire pressure detector, and specifies a tire ID of a tire that rotates in synchronism with rotation of each axle to determine the tire position of the tire.

Abstract: A receiver includes an antenna unit that is able to receive a transmission signal from a subject alternately at different reception levels. A wave detection unit wave-detects the transmission signal to generate a detection signal. The detection signal has a signal level that becomes fixed in accordance with the transmission signal when the antenna unit receives the transmission signal at a reception level greater than or equal to a reception limit, and the signal level of the detection signal becomes non-fixed when the antenna unit receives the transmission signal at a reception level that is less than the reception limit. A correction unit removes, when the detection signal includes a fixed value session and a non-fixed value session, the non-fixed value session and corrects the signal level of the non-fixed value session to a level equivalent to the signal level of a fixed value session.

Abstract: A tire position determination system includes a tire pressure detector attached to each tire to generate a tire pressure signal. An acceleration detector generates gravitational information for each tire pressure detector. A receiver arranged in a vehicle body receives the tire pressure signal from each tire pressure detector. An axle rotation amount detector detects an axle rotation amount of an axle corresponding to each tire and generates pulses indicative of the detected axle rotation amount. An automatic locator determines the position of each tire based on the gravitational force and the pulses. A pulse combination determination unit determines whether or not a combination of the pulses from the axle rotation amount detectors is appropriate. A pulse acquisition timing setting unit sets an acquisition timing of the pulse signal for the automatic locator based on the determination of the pulse combination determination unit.

Abstract: Each tire pressure detector detects a characteristic point in a detection signal of an acceleration sensor indicating that the tire pressure detector is located at a certain rotation position. When detecting the characteristic point, the tire pressure detector transmits a notification signal including the detector ID. Whenever a receiver receives a notification signal, the receiver acquires an axle rotation amount of a representative wheel and stores the axle rotation amount in a memory in association with the detector ID in the notification signal. After acquiring axle rotation amounts associated with the detector IDs of all of the tire pressure detectors, the receiver determines mounting positions of tires from the angle each tire pressure detector rotated and the angle each axle rotated between a first determination timing and a second determination timing.

Abstract: A travelling state determination unit of a tire pressure detector determines a travelling state of a vehicle based on a gravitational component force detected by an acceleration sensor. An operation mode switching unit of the tire pressure detector switches the operation mode of the tire pressure detector from a pressure determination mode to an automatic locating mode when the vehicle speed become lower than a threshold value. An interval of period transmission of radio waves in the automatic locating mode is set to be shorter than an interval of the periodic radio wave transmission in the pressure determination mode.

Abstract: A communication method transmits a detection signal including a valve ID, which is a fixed data string, and detection information, which is a variable data string, performs error detection on the received detection signal, and uses the detection information when there is no error. The communication method generates third data corresponding to the detection information in accordance with a predetermined rule to increase redundancy of the detection information, generates computed data by performing an exclusive disjunction logic operation with the valve ID and data including the detection information and the third data, transmits the detection signal that includes the computed data, receives the detection signal, restores the detection information and the third data by performing an exclusive disjunction logical operation with the received detection signal and the computed data, and determines whether the detection information conforms to the third data.

Abstract: A tire position determination system includes a tire pressure detector coupled to a tire. A tire position determination unit locates the tire pressure detector and determines a mounting position of the tire. A gravitational component force detection unit generates gravitational force information of the tire pressure detector. A characteristic value acquisition unit acquires the angle of the tire pressure detector from the gravitational force information. The characteristic value acquisition unit acquires a first characteristic value of the tire pressure detector when a drive source of the vehicle is stopped and a second characteristic value of the tire pressure detector when the drive source is started. A characteristic value comparator compares the first and characteristic values. An operation control unit determines whether the mounting position of the tire has been changed based on the comparison and controls the tire pressure monitoring unit accordingly.