Abstract: In a navigation apparatus having a cradle unit that is fastenable to a vehicle and is equipped with at least a microcomputer; and a front panel unit that is attachable to and detachable from the cradle unit and is equipped with at least a display displaying map data and a microcomputer performing a navigation function to indicate a determined location of the vehicle on the map data, it is configured such that a panel is integrally formed at bottom of the cradle unit to be attachable to the vehicle. With this, it becomes possible to provide the navigation apparatus configured such that a member having a microcomputer performing a navigation function is attachable/detachable to/from the main body, i.e., the base unit, thereby improving ease of use, that the member can be easily attached to the dashboard of the vehicle, and that unnatural impression is prevented from arising in the appearance.

Abstract: A navigation apparatus includes a base unit fastenable to a dashboard at a driver's seat of a vehicle, a front panel unit attachable to and detachable from the base unit and with a display displaying map data, and a microcomputer adapted to perform a navigation function to indicate a determined location of the vehicle on the map data. The navigation apparatus is configured such that a part of the front panel unit projects from a surface of the dashboard toward a user seated in the driver's seat, as viewed from side, when the front panel unit is attached to the base unit. With this, the degree of freedom of front panel unit attachment/detachment with respect to the base unit is improved without sacrificing the appearance of the navigation apparatus.

Abstract: In a navigation apparatus having a base unit that is fastenable to a dashboard at a driver's seat of a vehicle; a front panel unit that is attachable to and detachable from the base unit and is equipped with a display displaying map data; and a microcomputer that performs a navigation function to indicate a determined location of the vehicle on the map data, it is configured such that a part of the front panel unit projects from a surface of the dashboard toward a user seated in the driver's seat, as viewed from side, when the front panel unit is attached to the base unit. With this, the degree of freedom of front panel unit attachment/detachment with respect to the base unit is improved without sacrificing the appearance of the navigation apparatus.

Abstract: In a navigation apparatus having a base unit that is fastenable to a vehicle and a front panel unit that is attachable to and detachable from the base unit, it is configured such that there are provided with at least three detectors including a GPS signal receiver, wheel speed sensor and gyrosensor; and the microcomputer of the front panel unit determines the detector or detectors to be used for determining the location of the vehicle in accordance with output condition of the detector or detectors. Since the determination is made based on the output condition of the detector or detectors, the detector(s) used for location determination can be optimally selected to enhance the accuracy of vehicle location determination, while the flexibility of detector use in location determination can be improved in the point that the location determination is not necessarily restricted to use of the three detectors.

Abstract: In a navigation apparatus having a cradle unit that is fastenable to a vehicle and is equipped with at least a microcomputer; and a front panel unit that is attachable to and detachable from the cradle unit and is equipped with at least a display displaying map data and a microcomputer performing a navigation function to indicate a determined location of the vehicle on the map data, it is configured such that a panel is integrally formed at bottom of the cradle unit to be attachable to the vehicle. With this, it becomes possible to provide the navigation apparatus configured such that a member having a microcomputer performing a navigation function is attachable/detachable to/from the main body, i.e., the base unit, thereby improving ease of use, that the member can be easily attached to the dashboard of the vehicle, and that unnatural impression is prevented from arising in the appearance.

Abstract: In a navigation apparatus having: a base unit fastenable to a vehicle and equipped with at least a microcomputer; and a front panel unit attachable to and detachable from the base unit and equipped with at least a display displaying map data and a microcomputer performing a navigation function to indicate a determined location of the vehicle on the map data, a front surface of the front panel unit is made same size as a mating face of the base unit; and the display occupies 70% or greater of length of the front panel unit in a lateral direction. With this, the front panel unit including the microcomputer for performing navigation functions can be configured to be attachable/detachable to/from the base unit to enhance ease of use, and the size (area) of the display formed in the front panel unit can be increased to improve viewability.

Abstract: A contents distribution system comprises a contents provider and a user's portable terminal player. The contents provider, which comprises a contents server and a user information database storing therein user download information and right information, distributes contents over a communication network according to the SDMI check-in/check-out rule. The user's portable terminal player comprises a recording medium playback function that plays back the contents downloaded on a recoding medium and a check-in function that returns a playback right to the contents provider.