The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 01, 1998
Filed:
May. 16, 1996
Takumi Ajima, Zama, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Electronic information such as pieces of map information, pieces of index information, pieces of route searching information, pieces of local facility information, pieces of audio information, pieces of dynamic image information and pieces of static image information are recorded in a CD-ROM. A part of electronic information are compressed, and any pieces of information in the remaining part of electronic information is not compressed. When an operator input a current position, a pieces of particular electronic information corresponding to a peripheral area of the current position is read from the CD-ROM to a navigation apparatus, it is judged by a compression mode judging unit whether or not the particular electronic information is compressed. In cases where the particular electronic information is compressed, the particular electronic information is expanded in an expanding unit, and a map image of the peripheral area is prepared in an navigation control unit and is displayed on a display. Therefore, because a part of electronic information are compressed, a large volume of electronic information can be recorded in the CD-ROM, and a navigating operation can be performed at various functions and high performance in a navigation system.