On-board route display receiving information from external device
First Claim
1. An on-board route display for obtaining, from an external device installed on a road, a recommended route leading a vehicle travelling on the road to a destination and for displaying the recommended route, comprising:
- a memory to store names of intersections and information identifying said intersections corresponding to said names,a setting unit to select a desired one of said stored names of intersections as corresponding to a destination intersection,a transmitter to transmit to said external device information for identifying said destination intersection corresponding to said selected desired intersection name based on said information stored in said memory,a receiver to receive recommended route information leading to said destination intersection corresponding to said selected desired intersection name from the external device, andan indicator to indicate a recommended route to a user comprising a brief pattern figure based on said received recommended route information.
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Accused Products
Abstract
A system for providing and displaying recommended navigation information in a vehicle includes a simple on-board display, a destination selection input keyboard, a beacon receiver, a beacon transmitter and a computer control device on-board the vehicle, in connection with a roadside beacon that is further in communication with a centralized traffic information center. When a destination intersection is selected and set with the input keyboard, the beacon transmitter transmits the destination intersection information together with an ID number of the vehicle to the traffic information center via the beacon. Recommended route information leading to the destination intersection, road junction information, and available lane direction information are transmitted from the traffic information center via the beacon to the beacon receiver. The simple display shows the recommended route as a simplified graph of connected line segments from the received recommended route information and various other information. An audio output device provides vocal guidance messages. All these operations are controlled by the computer control device. Therefore, the device does not have to store and display map data. Names and coordinates or codes of intersections are stored in the control device. The user can easily enter a destination intersection by specifying a name of an intersection using the input keyboard.
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Citations
19 Claims
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1. An on-board route display for obtaining, from an external device installed on a road, a recommended route leading a vehicle travelling on the road to a destination and for displaying the recommended route, comprising:
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a memory to store names of intersections and information identifying said intersections corresponding to said names, a setting unit to select a desired one of said stored names of intersections as corresponding to a destination intersection, a transmitter to transmit to said external device information for identifying said destination intersection corresponding to said selected desired intersection name based on said information stored in said memory, a receiver to receive recommended route information leading to said destination intersection corresponding to said selected desired intersection name from the external device, and an indicator to indicate a recommended route to a user comprising a brief pattern figure based on said received recommended route information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A traffic information transmission device for transmitting information with respect to a vehicle travelling on any of a plurality of lanes, comprising:
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a beacon device provided at a road side, and a plurality of transmitter-receiver units respectively provided corresponding to each of said plurality of lanes and connected to said beacon device, wherein each respective one of said transmitter-receiver units comprises a respective identifying code that identifies said respective one of said transmitter-receiver units, and transmits lane information that identifies a respective one of said lanes with respect to the vehicle travelling thereon according to said identifying code. - View Dependent Claims (10)
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11. A route guidance system for directing a vehicle to a destination by a recommended route, comprising:
- a route display provided in a vehicle, and a route information transmission device provided outside the vehicle for transmitting route information to said route display,
wherein said route display comprises; a memory adapted to store names of intersections and information for identifying intersections corresponding to said names of intersections, a setting unit adapted to select a desired one of said stored names of intersections as corresponding to a destination intersection, a transmitter adapted to transmit to said route information transmission device information for identifying said destination intersection corresponding to said selected desired intersection name based on said information stored in said memory, a receiver adapted to receive recommended route information leading to said destination intersection corresponding to said selected desired intersection name from said route information transmission device, and an indicator adapted to indicate a recommended route to a user comprising a brief pattern figure based on said received recommended route information, and wherein said route information transmission device comprises; a plurality of transmitter-receiver units provided on a road at a constant interval from one another and adapted to communicate with the vehicle, and a host computer connected to each of said plurality of transmitter-receiver units and adapted to calculate a recommended route to provide said recommended route information.
- a route display provided in a vehicle, and a route information transmission device provided outside the vehicle for transmitting route information to said route display,
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12. In a vehicle for travelling on a road to a destination, having an on-board navigation aid that includes a display adapted to display navigation information indicating a recommended route leading to said destination and that is adapted to cooperate with an external device installed at a fixed location external to and separate from said vehicle, an improvement wherein said on-board navigation aid comprises, mounted in said vehicle:
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a computer processor, a memory connected to said computer processor and adapted to store a plurality of road intersection names and a plurality of road intersection location data respectively associated with said intersection names, a user input keyboard connected to said computer processor and including input keys adapted to select one of said intersection names as identifying said destination, a transmitter connected to said computer processor and adapted to transmit to said external device a particular one of said intersection location data associated with said selected one of said intersection names, a receiver connected to said computer processor and adapted to receive from said external device said navigation information indicating a recommended route leading to said destination identified by said selected intersection name and said particular intersection location data associated therewith, and said display, wherein said display comprises a simple graph of fixed line segments interconnected at fixed angles and adapted to have one or more of said fixed line segments used in each case to display said recommended route in a normalized and approximated manner. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification