Communications: electrical – Vehicle position indication – Map display
Reexamination Certificate
2000-03-28
2001-06-05
Wu, Daniel J. (Department: 2632)
Communications: electrical
Vehicle position indication
Map display
C340S991000, C340S990000, 36, C701S213000
Reexamination Certificate
active
06243030
ABSTRACT:
This invention generally relates to, electronic navigation systems, and more particularly to such systems using wirelessly generated video map images.
BACKGROUND
It is often difficult for travelers to navigate in unfamiliar cities, particularly at nighttime or in other periods of limited visibility. Locating smaller streets and roads is often time consuming since street and roadsigns are often unlighted and/or obscured or partially obscured by trees and other vegitation. Most travelers use printed maps, but more recently GPS systems are becoming more available as are INTERNET navigation systems to electronically guide travelers. However, such electronic systems use prerecorded maps on CD-ROM or other recording medium and often do not contain information on current road repairs, newer streets, detours, and other changes that have occured since the map information was originally recorded. Furthermore at nightime and at other times of poor visibility, it is difficult to correlate the map information with visible landmarks, such as street signs.
SUMMARY OF INVENTION
According to the invention there is provided a system for wirelessly transmitting video maps and other information from localized ground transmitters, to provide enlarged, detailed maps of different zones of a city, town, village, or other area to travelers. In one embodiment, one or more wireless transmitters are provided in each different zone of urban or suburban areas, with each transmitting enlarged video maps of its own zone or area, adapted to be received and displayed by video receivers carried by travelers. As the traveler proceeds from one zone to the next, the map display on his receiver changes to display the enlarged map of that next area. The traveler's receiver may also receive GPS navigation information from existing GPS satellites and/or receive information over the INTERNET from wireless connection to an INTERNET network. Additionally, one preferred embodiment provides interactive communication between the traveler's receiver and the local ground transmitter to provide the traveler with additional information, services, and assistance as may be required.
REFERENCES:
patent: 5179519 (1993-01-01), Adachi et al.
patent: 5689252 (1997-11-01), Ayanoglu et al.
patent: 5699255 (1997-12-01), Nanba et al.
patent: 5739772 (1998-04-01), Nanba et al.
patent: 5774830 (1998-06-01), Tsuji
patent: 6140943 (2000-10-01), Levine
Nguyen Tai T.
Wu Daniel J.
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