Display method and apparatus for navigation system
First Claim
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1. A display method for a navigation system, comprising the following steps of:
- displaying a guidance map for guiding a user to a destination by indicating a maneuver point on the route and a direction of turn at the maneuver point;
detecting a plurality of maneuver points in succession on the route to the destination and applying a test condition to the maneuver points based on geometry of the maneuver points;
adjusting a number of maneuver points to be displayed on the guidance map as a result of applying the test condition to the maneuver points; and
enlarging a size of the guidance map while including the adjusted number of maneuver points in the guidance map;
wherein said test condition includes a test condition (1) which determines L(n, n+1≦
Lmax, where L(n, n+1) is a drive length along a street between two adjacent maneuver points Pn and Pn+1, and Lmax is a maximum allowable drive length of the a street between the two adjacent maneuver points and a test condition (2) which determines L(n, n+1)≦
KDD(1,
2), where D(1,
2) is a straight-line length between a first maneuver point P1 and a second maneuver point P2, and Kn is a relative factor for determining maximum allowable straight-line maneuvers.
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Abstract
A display method and apparatus for navigation system for displaying a guidance map showing appropriate number of upcoming and subsequent turns on the route to the destination with an appropriate and enlarged display size. The guidance map includes a highlighted route indicating the directions of turns. The navigation system applies various test conditions to the geometry of the streets to determine the number of turns to be displayed. Then, the navigation system enlarges the guidance map so that the map covers the area that can show the adjusted number of turns and the streets at the maximum size.
77 Citations
22 Claims
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1. A display method for a navigation system, comprising the following steps of:
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displaying a guidance map for guiding a user to a destination by indicating a maneuver point on the route and a direction of turn at the maneuver point;
detecting a plurality of maneuver points in succession on the route to the destination and applying a test condition to the maneuver points based on geometry of the maneuver points;
adjusting a number of maneuver points to be displayed on the guidance map as a result of applying the test condition to the maneuver points; and
enlarging a size of the guidance map while including the adjusted number of maneuver points in the guidance map;
wherein said test condition includes a test condition (1) which determines L(n, n+1≦
Lmax, where L(n, n+1) is a drive length along a street between two adjacent maneuver points Pn and Pn+1, and Lmax is a maximum allowable drive length of the a street between the two adjacent maneuver points and a test condition (2) which determines L(n, n+1)≦
KDD(1,
2), where D(1,
2) is a straight-line length between a first maneuver point P1 anda second maneuver point P2, and Kn is a relative factor for determining maximum allowable straight-line maneuvers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A display apparatus for a navigation system, comprising:
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means for displaying a guidance map for guiding a user to a destination by indicating a maneuver point on the route and a direction of turn at the maneuver point;
means for detecting a plurality of maneuver points in succession on the route to the destination and applying a test condition to the maneuver points based on geometry of the maneuver points;
means for adjusting a number of maneuver points to be displayed on the guidance map as a result of applying the test condition to the maneuver points; and
means for enlarging a size of the guidance map while including the adjusted number of maneuver points in the guidance map;
wherein said test condition includes a test condition (1) which determines L(n, n+1)≦
Lmax, where L(n, n+1) is a drive length along a street between two adjacent maneuver points Pn and Pn+1, and Lmax is a maximum allowable drive length of the a street between the two adjacent maneuver points and a test condition (2) which determines L(n, n+1)≦
KDD(1,
2), where D(1,
2) is a straight-line length between a first maneuver point P1 and a second maneuver point P2, and KD is a relative factor for determining maximum allowable straight-line maneuvers.- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification
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Current AssigneeAlpine Electronics Incorporated (Alps Alpine Co., Ltd.)
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Original AssigneeAlpine Electronics Incorporated (Alps Alpine Co., Ltd.)
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InventorsYokota, Tatsuo
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Primary Examiner(s)TONG, NINA C
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Application NumberUS10/196,840Publication NumberTime in Patent Office748 DaysField of Search701/208, 701/211, 701/209, 701/210, 340/990, 340/995.1, 340/995.11, 340/995.14, 340/995.15, 340/995.17, 340/995.2, 340/995.27US Class Current340/990CPC Class CodesG01C 21/3632 Guidance using simplified o...G08G 1/0969 having a display in the for...
