Kabushiki Kaisha Tokai Rika Denki Seisakusho

Toyota Jidosha Kabushiki Kaisha

Tokai-rika-denki-seisakusho Kabushiki Kaisha

Kabushiki Tokai-rika-denki Seisakusho

Sadao Kokubu

Hisashi Aoki

Takashi Mizuno

Shinichi Koga

Yoshiyuki Mizuno

Hiroshi Demura

Minoru Morikawa

Takao Sakakibara

Kazumi Hayashi

Shigeru Iguchi

Kouji Takizawa

Akira Kawahashi

Yasuo Miyake

Yoshimasa Kunimatsu

Minoru Nishio

Yasuo Oyama

Shigeru Hayashi

Yasuo Ohyama

Makoto Okada

Koji Takizawa

Yoshitaka Hattori

Tadashi Hirai

Nobuhiro Endou

Masatoshi Hirano

Shinji Mizutani

A method and apparatus are provided for reliably detecting a touch operation in a touch sensitive control surface, despite the influence of light or the existence of an obstruction. In the touch tracer, LEDs and phototransistors for detecting a touch position on the input pad are arranged to form parallel optical axes in the vertical direction and the horizontal direction. The optical axes of the LEDs and the phototransistors are alternately arranged in opposite directions to the adjacent optical axis. Moreover, the front surface of the phototransistor is closed except for an aperture that forms an optical axis only between opposing LEDs. The apertures are divided in half into top and bottom portions by a light-shielding film. Because of the light-shielding film, the phototransistor does not receive any light interference from the adjacent LED or incidental sunlight.

Touch operation signal output device

A data carrier system is comprised of a vehicle-side controller,mounted at a vehicle,, keys,A and,B, and an R/W device,installed in an office,. A transponder,is built into each of the keys,A and,B. In this structure, after operational data has been transmitted from the vehicle-side controller,and written in a nonvolatile memory of the transponder,, when the keys,A and,B are inserted in the R/W device,by a vehicle driver, the R/W device,reads the operational data from the transponder,and gives the same to a personal computer,. Accordingly, an inconvenience of the vehicle driver carrying an IC card for recording operational data is removed.

Data carrier system

The present invention simplifies assembly of a vehicle starting device and facilitates arrangement design. A vehicle starting device,has a card receiving portion,and a main mechanism,connected with each other integrally. The card receiving portion,includes an inclinable inner case,in which an integrated circuit (IC) card is inserted. The card receiving portion,also includes a roller,and a release mechanism,for releasing the IC card. The roller,is lifted by the insertion of the IC card. The release mechanism,releases the IC card from the card receiving portion,. The main mechanism,has a knob,and a steering shaft lock,. A card release prevention mechanism,, an ejector lever,for actuating the release mechanism,, and a cooperative unlocking mechanism,are provided between the main mechanism,and the card receiving portion

Keyless vehicle starter control device

When an engine is started with a key,A inserted in an ignition key cylinder of a vehicle,, a vehicle-side controller,transmits operational data to the key,A and stores in the key,A. Further, when a personal computer,is operated with the key,A inserted in an R/W device,, the R/W device,reads the operational data from the key,A and transfers to the personal computer,. In this structure, when a storage capacity of the key,A becomes full, the vehicle-side controller,stores the operational data in a storage portion of its own, and when the key,A is initialized, the stored operational data is written in the key,A. For this reason, even when initialization of the key,A is difficult, deletion of the operational data is prevented.

A vehicular door lock control apparatus for unlocking a door lock mechanism includes a key for performing a first unlocking operation and a second unlocking operation. A door key cylinder is actuable to an unlock position by using the key. The key is insertable into the door key cylinder. A transmitter-receiver is disposed at the key, and transmits an answer signal that indicates a specific identification code upon receipt of at least one of a power signal and an inquiry signal. An operating force transmission mechanism, actuable between a transmission mode and a non-transmission mode, transmits an unlocking force applied by the key during the second unlocking operation to the door lock mechanism when in the transmission mode. A control mechanism transmits at least one of the power signal and the inquiry signal to the transmitter-receiver when the key performs the first unlocking operation, and actuates the operating force transmission mechanism to the transmission mode when the identification code received from the transmitter-receiver conforms to a pre-set identification code.

Vehicular door lock control apparatus

Vehicle start-up permission device and identification code registering

A transmitting and receiving system including, a transponder always maintains a transmission function even if circuit constants of circuit elements are deviated or such circuit constants are shifted in association with temperature changes. The transponder includes a transponder coil electromagnetically coupled to an antenna coil through which a response signal is transmitted, a resonance capacitor, a main modulation circuit including a first modulation capacitor, and a supplemental modulation circuit including a second modulation capacitor whose static capacitance value is different from that of the first modulation capacitor. A response signal is transmitted in changing an impedance of a transmitting and receiving portion by the main modulation circuit when a question signal is received and by the supplemental modulation circuit when a correction command signal is received.

Transmitting and receiving system

The invention relates to a transmission-reception system, particularly a transmitter-receiver device contained in the bow of an ignition key. When a resonance circuit receives a carrier wave signal from a transmission-reception ECU of a motor vehicle, a microcomputer is switched to an active state by the output of a power circuit that smoothes and rectifies the carrier wave signal. A detector circuit discriminates an enquiry signal supplied together with the carrier wave signal through the resonance circuit portion, and outputs the signal to the microcomputer. In response to the enquiry signal together with random number data, the activated microcomputer changes the bit length of an identification code stored in an EEPROM, on the basis of the received random number data and a predetermined function, and performs the on-off control of an FET of a modulating circuit in a mode corresponding to the bit length-changed identification code. The microcomputer thus performs control to send back an enciphered answer signal to the transmission-reception ECU.

Transmission-reception system

The invention relates to a transmission-reception system. A transponder receiver unit contained in the key bow of an ignition key has a power circuit that receivers, rectifies and smoothes the carrier wave signal transmitted together with a time reference signal and an enquiry signal from the transmission-reception ECU of a motor vehicle. A microcomputer in the transponder becomes active when the output voltage of the power circuit reaches a predetermined level or higher. When activated, the microcomputer measures the time length of the received reference time signal using the clock signal generated by an oscillation circuit, and calculates a ratio, as a correction coefficient, between the measured time length and a stored reference time value. The microcomputer decodes the enquiry signal while correcting the time information included in the time series pulse signal forming the enquiry signal, using the correction coefficient.

Transmission-reception time correction system

A key-operated cylinder device includes a cylinder device body into which a key having a secondary coil is inserted, the cylinder device body including a coil mounting portion forming the front end portion of said cylinder device body; a primary coil mounted in said coil mounting portion, the primary coil wound on a coil bobbin; and shielding device for preventing the magnetic flux of the primary coil from flowing into the cylinder device body, the shielding device being arranged between the coil mounting portion and the primary coil.

Cylinder lock and key device

Vehicle starting control device

A transmit-receive system is composed of a portable transmitter-receiver and an external transmitter-receiver that exchange data by using air-propagating signals. The portable unit has a start switch, and transmits a start signal to the external unit when the start switch is turned on. Upon receiving the start signal, the external unit transmits a question signal to the portable unit. Upon receiving the question signal, the portable unit transmits thereto a response signal. Optionally, the external unit intermittently transmits the question signal, and becomes ready to receive during the question signal intermission. The external unit stops transmission of the question signal if it transmits the question signal a predetermined number of times without receiving the response signal. Further, the external unit intermittently becomes ready to receive for periods shorter than the question signal intermission.

Transmit-receive system

When an ignition switch detects that a key rotor of an ignition key cylinder has been turned to the accessory position by a key, a controller energizes a primary coil to cause it to output a high-frequency signal. In the key, a secondary battery is charged with a constant DC voltage generated from an AC voltage induced across a secondary coil. A transmission circuit is powered by the secondary battery, and allowed by a timer circuit to transmit a radio signal including an identification code during a predetermined period after the high-frequency signal is received by the key. Alternatively, the controller energizes the primary coil plural times with a cycle consisting of predetermined output and pause periods if the transmitted identification code does not coincide with a preset identification code at the first comparing attempt.

Vehicular antitheft apparatus using an identification code transmitted

In a vehicular communication system, a microcomputer of a transmission-reception electronic control unit (ECU) transmits stored data via an antenna coil to a transceiver disposed in an ignition key when the ignition key is inserted in an ignition key cylinder of a vehicle. During communication with the transceiver, the microcomputer outputs a key interlock actuating signal. While the key interlock actuating signal is being inputted to a key interlock control circuit, the key interlock control circuit operates a key interlock actuator to prevent the ignition key cylinder from being turned to a position at which the ignition key may be freely removed from the ignition key cylinder. Thus, the ignition key is prevented from being removed from the ignition key cylinder during communication between the ignition key transceiver and the microcomputer, thereby ensuring that data about the vehicle will be stored in a reception device disposed in the ignition key without a failure.

Vehicular communication system using an ignition key

A key device includes a signal processing device for generating a signal containing specific information, a key plate having a stem and fitting device for fitting the signal processing device and the stem, the fitting device provided with the stem and the signal processing device, the fitting device of the signal processing device being formed while preliminarily resin-molding.

Growing community of inventors

Aichi, Japan

Sadao Kokubu