1
Fuminobu Komura, Yoshikazu Hirayama, Koichi Homma, Makoto Kato, Takanori Shibata, Yoji Matsuoka, Akira Kagami, Michitaka Kosaka: Navigation system and method using map data. Hitachi, Fay Sharpe Beall Fagan Minnich & McKee, May 10, 1994: US05311173 (83 worldwide citation)

In a navigation system which has sensors for detecting a running distance, an azimuth, etc. of a vehicle, and a memory for storing map data; a probability density of a position of the vehicle is calculated on the basis of the sensor outputs and the map data for each of quantization units with which ...


2
Yoshikazu Hirayama, Yoshiyuki Kobayashi: Speech recognition apparatus and speech recognition navigation apparatus. Zanavi Informatics Corporation, Crowell & Moring, March 16, 2004: US06708150 (76 worldwide citation)

A speech recognition apparatus includes: a speech input device; a storage device that stores a recognition word indicating a pronunciation of a word to undergo speech recognition; and a speech recognition processing device that performs speech recognition processing by comparing audio data obtained ...


3
Yoshikazu Hirayama: Image display optical system, image display unit, illuminating optical system, and liquid crystal display unit. Nikon Corporation, Klarquist Sparkman, August 17, 2010: US07778508 (25 worldwide citation)

Image display optical systems are disclosed that extend the angle of view longitudinally and transversely while saving space. The image display optical system includes a prism-shaped substrate transparent to an image-carrying light flux to be projected to a viewing eye, an introduction unit that gui ...


4
Yoshiyuki Kobayashi, Yoshikazu Hirayama: Navigation equipment which determines current position dependent on difference between calculated value of self-contained navigation and measured value of radio navigation. Xanavi Informatics Corporation, Pennie & Edmonds, June 6, 1995: US05422639 (15 worldwide citation)

In a case where a flag delivered from a self-contained navigation processor indicates that a position measured by the self-contained navigation processor lies on or in the vicinity of a road contained in road map information, a position correction processor selects and delivers the measured position ...


5
Yoshikazu Hirayama, Yoshiyuki Kobayashi: Voice reference apparatus, recording medium recording voice reference control program and voice recognition navigation apparatus. Xanavi Informatics Corporation, Crowell & Moring, September 27, 2005: US06950797 (1 worldwide citation)

A voice reference apparatus that classifies a plurality of search targets into a plurality of division blocks, searches for a search target by first specifying a division block and then specifying the search target and enables specification of, at least, the search target to be made by voice, includ ...


6
Yoshikazu Hirayama: Navigation device and address input method thereof. Xanavi Informatics Corporation, Antonelli Terry Stout & Kraus, November 13, 2007: US07295923 (1 worldwide citation)

Voice input of an address, which is user-friendly and has improved recognition result accuracy. First, a whole street name (full name) is uttered and voice recognition is tried. Only if the voice recognition fails, at least one letter of a character string expressing the street name is uttered, and ...


7
Miho Matsumoto, Yoshikazu Hirayama, Kinya Kato, Yoshikazu Sugiyama: Catadioptric imaging lens. Nikon Corporation, Shapiro Gabor and Rosenberger PLLC, July 19, 2016: US09395525

A catadioptric imaging lens includes: a first reflecting mirror; a second reflecting mirror; and a lens group. A reflecting surface of the first reflecting mirror is a rotationally asymmetrical aspherical, with concavity on the object side within the reference and the first orthogonal plane. A refle ...


8
Yoshikazu Hirayama, Miho Matsumoto: Zoom optical system. Nikon Corporation, Shapiro Gabor and Rosenberger PLLC, January 3, 2017: US09535240

Provided is a zoom optical system which includes, in order from an object, a first lens group having negative refractive power and other lens groups, and in which an interval between each lens group changes upon zooming, wherein the first lens group includes a first negative lens which is disposed c ...


9
Yoshikazu Hirayama: Voice output unit and navigation system. Antonelli Terry Stout & Kraus, August 26, 2004: US20040167781-A1

A navigation system comprises a voice signal synthesizing section 33 which generates a voice signal from a text-based document, a speaker 17 which outputs the voice signal generated in the voice signal synthesizing section 33 as a voice, a drive circuit 18 thereof, a grasping section 31 which grasps ...


10
Yoshikazu Hirayama: Optical image display system and image display unit. Nikon Corporation, Klarquist Sparkman, January 11, 2007: US20070008624-A1

Optical-image display systems are disclosed having simple structure and a large exit pupil. An exemplary system includes a transmissive plate having inside an optical path of light flux from a display at each angular field of view of an image-display element. The light flux is internally reflected r ...