EP0478438B1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Car navigation aid on-board receiver

Assignee: Sagem SA

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Filing: 1991-09-24

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Granted: 1995-12-13

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Expires: 2011-09-24

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Abstract

Abstract The receiver is intended to receive, via transmitters and a special broadcast channel, coded messages containing at least locations of problems of a finite series of locations placed in memory (11) in the receiver and comprising means (32) for decoding of messages and means (8-12, 2) of restoration of the latter into a form accessible to a motorist. The receiver also comprises a memory (11) for storage of pixels representing road maps, means (8) of display of portions of these maps on a visual display terminal (2) and means (8) of graphical restoration of the locations of problems from the messages on the terminal (2). When a traffic problem produces its effects on a section of road between two points, this section is shown up on a portion of a displayed map by substitution, for the pixels of the section, of pixels of a particular colour. <IMAGE>

Inventors

👤 Jean Babsky
👤 François Millet

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-10-24 11:01

CPC Classifications

G; G01; G01C; G01C21/00; G01C21/26; G01C21/34; G01C21/36; G01C21/3691; G01C21/3694; G08; G08G; G08G1/00; G08G1/09; G08G1/0962; G08G1/0968; G08G1/0969

Claims Analysis

Total Claims: 6

Claim 1

Independent Claim 171 words

On-board receiver for assisting with motor vehicle navigation intended to receive, by transmitters (154) and a specific radio-broadcasting channel, coded messages containing at least locations of traffic problems from a finite sequence of locations stored in a memory (11) in the receiver and comprising means (32) for decoding messages and means (8-12, 2) for restoring the latter in a form accessible to a motorist, the receiver being characterised by the fact that it comprises a memory (11) for the storage of pixels representative of road-maps, means (8) for displaying portions of these maps on visualisation means (2) and means (8) for the graphic restoration of the locations of traffic problems coded by said messages on the visualisation means (2), arranged in order, when a traffic problem produces its effects on a section of road between two points (A, B), to materialise this section having a problem on a portion of map displayed by substituting, for the pixels of the section of the portion of map displayed, pixels of a particular colour.

Claim 2

Dependent Claim 33 words

Receiver according to Claim 1, in which said means for the substitution of pixels comprise means (8) for the recognition of contours for recognising those of said section of road comprising a problem.

Claim 3

Dependent Claim 24 words

Receiver according to one of Claims 1 and 2, in which a unit (3) is provided for processing radio-broadcast messages of the RDS type.

Claim 4

Dependent Claim 20 words

Receiver according to one of Claims 1 to 3, in which a unit (4) is provided for determining the heading.

Claim 5

Dependent Claim 21 words

Receiver according to one of Claims 1 to 4, in which a unit (5) is provided for determining the distance covered.

Claim 6

Dependent Claim 19 words

Receiver according to one of Claims 1 to 5, in which a unit (6)is provided for determining the position.

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