Patents by Inventor Yasunari Tanaka

Yasunari Tanaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20030142085
    Abstract: It is one objective of the present invention to provide a portable video display apparatus for which the optimum picture quality can always be provided, without a complicated operation being required and without the load imposed on a CPU being increased by the execution of a program.
    Type: Application
    Filed: January 21, 2003
    Publication date: July 31, 2003
    Inventors: Shinichi Taniguchi, Kosuke Kubota, Jun Ikeda, Ryota Hata, Yasunari Tanaka
  • Patent number: 6431267
    Abstract: An air conditioning unit including a box having an intake switching damper for selectively opening an outside air inlet and an inside air inlet to receive introduced air. The air conditioning unit further including a blower unit configured to draw in the introduced air and blow the introduced air to a downstream side, and an air regulating unit. The air regulating unit has a unit case with an evaporator configured to exchange heat between the introduced air and a refrigerant, a heater core configured to exchange heat between the introduced air and a warm fluid, and an air mix damper for adjusting a flow quantity of the introduced air that passes through the heater core. The unit case has a defroster damper for a defroster air outlet configured to discharge toward a glass surface a two-layer flow of air-conditioned air comprising a warm layer and a cold layer.
    Type: Grant
    Filed: May 19, 2000
    Date of Patent: August 13, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Yasunari Tanaka
  • Patent number: 6236690
    Abstract: A direct-conversion receiver includes a local oscillator for generating a local oscillator signal, a converter circuit for converting a received radio signal into a pair of a baseband I signal and a baseband Q signal in response to the local oscillator signal, a demodulator for demodulating the pair of the baseband I signal and the baseband Q signal into a demodulation-resultant signal which is neither an I signal nor a Q signal, a detector circuit for detecting a difference between a frequency of the local oscillator signal and a frequency of a carrier of the received radio signal, a clock signal generator for generating a first clock signal providing a timing which corresponds to a center of a symbol period, a signal delay device for delaying the first clock signal to provide a second clock signal, and a symbol deciding circuit for deciding a logic state of the demodulation-resultant signal at a timing determined by the second clock signal.
    Type: Grant
    Filed: June 14, 1999
    Date of Patent: May 22, 2001
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiro Mimura, Makoto Hasegawa, Katsushi Yokozaki, Hiroyuki Harada, Takaaki Kishigami, Yasunari Tanaka
  • Patent number: 6087963
    Abstract: A vehicle-mounted device for an automatic charge receipt system capable of being designed, manufactured and installed while an encrypting/decrypting algorithm and/or encrypting/decrypting keys remain hidden. Included is an arrangement for discrimination (i.e., identification) of a vehicle-mounted device or user each time a utilization charge is determined/settled, wherein an initial portion of communications concerning discrimination is conducted without encrypting/decrypting, and remaining portions of communications are conducted with encrypting/decrypting so as to protect an integrity and security of the automatic charge receipt system. Confindential components/information, e.g., the encrypting/decrypting algorithm and/or keys, and components directly handling such information are arranged within a tamper-/access-resistant unit (preferably as a sealed integrated circuit package) in the vehicle-mounted device.
    Type: Grant
    Filed: August 7, 1997
    Date of Patent: July 11, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Kenji Kobayashi, Toshiyuki Sakamoto, Yasunari Tanaka
  • Patent number: 5987174
    Abstract: An image pickup unit (2) mounted on a vehicle shoots an image in front thereof to attain image information. An edge pixel extraction section (40202 to 40206) scans the obtained image information for each line and then checks boundaries between a particular color and the other colors to extract pixels having the particular color as edge pixels. Moreover, a candidate line extraction section (40208 to 40212) references position coordinates of the extracted edge pixels such that assuming the edge pixels to be classified to configure straight lines, the edge pixels are coupled with each other to configure straight lines according to the classification so as to obtain the straight lines as candidate lines.Thereafter, a line selection section (40212) selects a left line and a right line in front of the vehicle from the plural candidate lines, thereby attaining the left and right lines.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: November 16, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Kazuto Nakamura, Kazuaki Takano, Tatsuhiko Monji, Eiryo Ondo, Yasunari Tanaka, Kazuhiko Hanawa
  • Patent number: 5908177
    Abstract: Herein disclosed is a flight control system comprising a control member, a control surface controllable to assume different angle positions within a control angle range, a transmission linkage provided between the control member and the control surface to transmit the control force from the control member to the control surface, and a power assist actuator associated with the control member and the transmission linkage to control the control surface.
    Type: Grant
    Filed: May 30, 1996
    Date of Patent: June 1, 1999
    Inventor: Yasunari Tanaka
  • Patent number: 5850254
    Abstract: An environment recognition device formed in such a manner that an image sensor is installed so that an image sensor mounting location recognition mark falls within an image pickup area, comparator for comparing mark locations the images of which are picked up sequentially by the image sensor with respect to the initial location of the recognition mark in the image pickup area is provided, and, when it is detected that the mark location recognized sequentially has changed with respect to the initial location, an indication signal for indicating that correction of the location of installing the image sensor is required is outputted, thereby to prevent erroneous decision in image processing when the mounting position changes by vibration, contact or the like.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: December 15, 1998
    Assignee: Hitachi, Ltd.
    Inventors: Kazuaki Takano, Tatsuhiko Monzi, Yasunari Tanaka, Eiryoh Ondoh, Makoto Shioya
  • Patent number: 5617451
    Abstract: A direct-conversion receiver includes a direct-conversion demodulator. A first device detects a strength of a received signal. A clock signal generator outputs a clock signal in response to a reception start signal. The clock signal has a frequency corresponding to a symbol rate or higher. A second device samples an output signal of the demodulator at a timing determined by the clock signal. A third device samples an output signal of the first device at a timing determined by the clock signal. A fourth device stores "n" output signals of the second device which relate to a signal periodically transmitted from a transmitting station "n" times, wherein "n" denotes a natural number equal to 2 or greater. A fifth device stores "n" output signals of the third device which correspond in timing to the "n" output signals of the second device. A sixth device reads out signals from the fourth device, and reads out signals from the fifth device.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: April 1, 1997
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Masahiro Mimura, Makoto Hasegawa, Katsushi Yokozaki, Hiroyuki Harada, Takaaki Kishigami, Yasunari Tanaka
  • Patent number: 5448755
    Abstract: Disclosed is a selective calling reception apparatus which comprises an intermittent reception oscillator for intermittently receiving a selective calling signal from a base station and a signal processing oscillator for processing the selective calling signal, in which the oscillation of the signal processing oscillator is controlled in accordance with a timing signal generated on the basis of the oscillation output of the intermittent reception oscillator. Accordingly, when the transmission rate of a selective calling signal is made high, it will do to make only the oscillation frequency of the signal processing oscillator high and it is not necessary to make the oscillation frequency of the intermittent reception oscillator high to thereby make is not required to be made high, so that the current consumption at the stand-by time does not increase.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: September 5, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yasunari Tanaka
  • Patent number: 5363438
    Abstract: A selective ringing receiving circuit comprises a timing generating circuit for generating a timing signal for bit length comparison, a bit length comparison circuit for comparing, in terms of the timing signal, the respective bit lengths of `1` and `0` of a received digital signal outputted in a direct conversion system when a selective ringing signal is received from a base station, thereby producing a changing point detection/selection signal, a changing point detection circuit for selecting the rising and falling changing points of the received signal using the changing point detection/selection signal to produce a detected rising or falling changing point signal of the received digital signal, and a bit synchronization circuit for performing bit synchronization in response to the detected changing point inputted.
    Type: Grant
    Filed: November 4, 1991
    Date of Patent: November 8, 1994
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventor: Yasunari Tanaka
  • Patent number: 4401971
    Abstract: An alarm device for a vehicle comprises sensors for detecting abnormal states of the vehicle, a logic circuit for receiving the outputs of the sensors and producing one or more alarm speech designation signals and an alarm speech generator responsive to the alarm designation signal. The logic circuit includes a priority circuit for determining the order of precedence of the abnormal states represented by the detection signals on the basis of the degree of emergency, so that the alarm speech is concerned with the most emergent alarm when two or more abnormal states are detected simultaneously. The logic circuit may further include a switch circuit for disabling at least one of the detection signals so that a vehicle driver having taken notice of particular alarms is not disturbed by excessive alarming.
    Type: Grant
    Filed: March 10, 1981
    Date of Patent: August 30, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Tadashi Saito, Tohru Sampei, Akihiro Asada, Yoshihiro Ohta, Syunji Iwasaki, Shigemitsu Higuchi, Hiroshi Ozawa, Yasunari Tanaka