Alpine Electronics, Inc.

Asahi Glass Company, Limited

Mobilemedia Brain Association, Inc.

Honda Motor Co., Ltd.

Nec Corporation

Japan Aviation Electronics Industry, Limited

Nec C Orporation

Minoru Sekine

Masaaki Ohira

Hitoshi Konishi

Syuji Matsumoto

Masayuki Arai

Yuji Watanabe

Hideto Shimazu

Nobuhiro Nakamura

Naoki Sugimoto

Tomoyuki Kobayashi

Osamu Imaki

Yuji Yokota

Toshihide Yofu

So Sato

Kohei Otsuki

Akihiko Akitaya

Hirofumi Otsuka

Takashi Wakasugi

An optical fiber connector comprises a ferrule having a rear end, a chuck located rearward of the ferrule, a ring having a front end, and a coil spring. The ring is attached to the chuck so as to surround the chuck. The optical fiber connector holds an optical fiber which is inserted from a rear end of the optical fiber connector. In detail, when the optical fiber is inserted into the optical fiber connector, an end of the optical fiber passes through the chuck to be accommodated in the ferrule. The coil spring presses the ring forward (toward the ferrule) so that the chuck is squeezed to hold the inserted optical fiber. When the ring is moved rearward by a stopper inserted between the rear end of the ferrule and the front end of the ring, the chuck is released to release the optical fiber.

Optical fiber connector

A map-updating-data creating apparatus performs, for each old map file, creating a map-updating file for rewriting the map file to a new map file, determining the serial number of each of the updated map files, creating a serial number management file in which marks are respectively written at positions corresponding to the serial numbers, and generating, as map-updating data, the map-updating file and the serial number management file. A navigation apparatus performs map-updating processing and determines, by referring to the serial number management file, whether a map file has already been updated. The navigation apparatus uses the map-updating file to execute navigation control if the map file has already been updated, and updates the map file and subsequently executes the navigation control if the map file has not been updated.

Map-updating-data creating method, and map updating method and apparatus

A map data update method for updating nationwide updated version map data using route-specific update data is disclosed. This method has a step of creating route-specific update data, comprising update data for all routes which have been newly opened since the time of release of the nationwide updated version map data; a step of storing a plurality of route-specific update data sets with different creation dates; a step of, when updating the nationwide updated version map data of the time of release stored in a navigation apparatus in use of a prescribed first route-specific update data which has been stored, storing pre-update map files necessary to restore the nationwide updated version map data; and a step of using the first route-specific update data to update the nationwide updated version map data.

Map data update method and map data update system

A map-data-generation device and a map-generation method used therefor, and a navigation device and a route-search method used therefor are provided. The map-data-generation device generates hierarchical guide-route-search-map data by using information about a road link of level(reference level), the road link generating a guide-object road. A first upper-level-link-determination unit determines a level-link by performing level-raising processing by using level--link information. A second-upper-level-link-determination unit acquires a plurality of links of levels (levelsto) higher than levelby performing the level-raising processing by using information about the level-link, and specifies an upper level map to which the link belongs on the basis of the range of a distance between a departure-point link and a destination-point link.

Map-data-generation device and map-generation method used therefor, and navigation device and route-search method used therefor

A glass-coated light-emitting elementof the invention has a semiconductor light-emitting elementhaving a surface on which no electrode is formed is coated with a glass, in which a surface of the glassconstitutes a part of a spherical surface broader than a hemispherical surface, the refractive index of the glassat an emission peak wavelength of the semiconductor light-emitting elementis 1.7 or more, and the ratio of the diameter of the above-mentioned spherical surface to the maximum diameter of a surface of the semiconductor light-emitting elementon which electrodes are formed is 1.8 to 3.5, whereby light emitted from the light-emitting element can be efficiently introduced into a light control unit, and alignment with a lens or a light pipe, which has hitherto been made, becomes unnecessary.

Glass-coated light-emitting element, light-emitting element-attached wiring board, method for producing light-emitting element-attached wiring board, lighting device and projector

A subscriber line accommodation device and packet filtering method is provided. In response to a request for acquisition of an IP address from a user terminal, a DHCP server in the subscriber line accommodation device allocates an IP address, registers a set of the allocated IP addresses, a MAC address of the user terminal, and a line number in a DHCP management table. The subscriber line accommodation device sets the registered information in an input filter section as a packet passing condition. Among packets sent from user terminals, the input filter section sends only those packets satisfying registered conditions toward a bridge forwarder and discards those packets not satisfying the conditions. Even when access is attempted by illegally using an IP address, the packet concerned is discarded unless the line number or a MAC address agrees.

Subscriber line accommodation device and packet filtering method

A navigation apparatus is disclosed comprising update functions to update nationwide updated version map data using route-specific update data, and to update the nationwide updated version map data to the next nationwide updated version map data using nationwide update data. A map update processing portion of this navigation apparatus performs updates of map data in the background of navigation control, gives priority to update processing using the route-specific update data over update processing using the nationwide update data, and, if map files to be updated using route-specific update files included in the route-specific update data have not been updated using the nationwide update data, performs updates using the nationwide update data, and then performs updates using route-specific update files.

Map data update method and navigation apparatus

A method of generating map update process data used for updating old map data including a great number of files to new map data includes the steps of using an old map file to be updated and a new map file to generate differential data; calculating a relative size of the differential data; and using the new map file if the relative size is higher than a predetermined value and using the differential data if the relative size is lower than the predetermined value to form the map update process data.

Method of generating map update process data, map update method, and map update apparatus

Map-updating-data creating method

An objective lens capable of recording or reproducing informations of HD, DVD and CD is provided. A reference lensand a close-contact lensare closely in contact and bonded, the material of the close-contact lensis different from the material of the reference lens, a lens surface of the reference lens and a lens surface of the close-contact lens have aspherical shapes, the reference lens has a light-converging function, and the close-contact lens has a region providing a positive refractive power and a region providing a negative refractive power to construct an objective lens for optical information recording media.

Objective lens for optical information recording medium

An optical glass which contains at least 20 mol % of TeOand has an internal transmittance of at least 80% in a thickness of 2 mm to a light having a wavelength of 405 nm and a refractive index of at least 1.85 to the same light, and which contains no alkali metal oxide or contains alkali metal oxides in a total amount of at most 15 mol %.

Optical glass and lens

The object of the present invention is to accommodate physical segments of LANs into a switching hub substituting them for virtual LANs without modifying software of terminals or setting of the terminal and provide a routing function of the third layer without deteriorating the degree of freedom in virtual LAN setting of the switching hub. The internetworking router of the present invention includes LAN controlling means 1, packet memory 2, bridge processing means 3, table memory 4, routing processing means 5, table memory 6, free buffer queue 7, reception buffer queue 8 and transmission buffer queue 9 between LAN controlling means 1 and bridge processing means 3, and reception buffer queue 10 and transmission buffer queue 11 between bridge processing means 3 and routing processing means 5. Table memory 4 includes bridge group table 41 and address learning tables 42.sub.1 to 42.sub.n. Table memory 6 includes routing table 61 and ARP table 62.

Growing community of inventors

Tokyo, Japan

Minoru Sekine