Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: A map display method, a map display device and a map display system which improve visibility by changing its display mode when a map is to be displayed on the screen. A predetermined map is displayed on the screen, a route is specified on the map displayed on the screen, the area having a predetermined width of this specified route is displayed clearly, and the other area is displayed less clearly.

Abstract: In an apparatus capable of listing broadcast programs, there are provided a broadcast program display method, a broadcast program display apparatus, and a broadcast receiver configured to list broadcast programs matching an interest and the other broadcast programs with varied visibilities on the screen so as to be able to efficiently select intended broadcast programs from many ones. The apparatus is provided with a program display means for listing broadcast programs on the screen. The program display means lists broadcast programs matching an intended interest, e.g., those selected in accordance with a genre or the like and the other broadcast programs with varied visibilities on the screen.

Abstract: A map display method, a map display device and a map display system which improve visibility by changing its display mode when a map is to be displayed on the screen. A predetermined map is displayed on the screen, a route is specified on the map displayed on the screen, the area having a predetermined width of this specified route is displayed clearly, and the other area is displayed less clearly.

Abstract: The invention provides a method for making mutual authentication between short-distance radio devices automatically or after confirmation by users, and a short-distance radio device for realizing the method. In a condition where a plurality of radio devices exist, each of the radio devices comprising a data communicating unit for performing short-distance radio communication and an authenticating unit for performing authentication of the radio device, the authenticating unit performs mutual authentication between two radio devices automatically or after confirmation by users of the radio devices when the two radio devices come closer to each other to such an extent that coverage areas of radio waves generated by the radio devices overlap with each other.

Abstract: A knee protector in an automobile which comprises an instrument panel arranged in front of a seat within a passenger compartment of the automobile and exiting widthwise of the automobile, and having an opening defined therein, a lid similar in shape to the contour of the opening and supported by the instrument for selectively closing and opening the opening in the instrument panel, a first protector member provided inside the lid, a pair of pin members spaced a distance from each other in a direction widthwise of the automobile and secured to the first protector member so as to protrude in a direction close towards the instrument panel, and a second protector member provided inside the instrument panel and having separate engagement regions defined therein for engagement with the respective pin members when a load acting in a direction frontwardly of the automobile acts on the lid.