Communications: electrical – Vehicle position indication – Map display
Patent
1989-09-01
1991-10-22
Crosland, Donnie L.
Communications: electrical
Vehicle position indication
Map display
34082519, 341 26, 364449, G08G 1123
Patent
active
050599658
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a method of a device for selection or entry of a destination location, in a navigation system of a motor vehicle. Present motor vehicle navigation systems, or those being developed, give the driver information for choosing the driving direction at intersections during driving after the driver has input his destination into the navigation system. All locations in the region whose map is digitally stored in the navigation system, are taken into consideration as driving destinations. With respect to traffic safety, the manner in which the driver indicates the driving destination has particular importance.
The driver can convey the driving destination to the navigation system by using a road map, a numeric code, or the name of the destination (location, street and street address). The handling of a road map or a handbook for taking the numeric code of the destination is a rather cumbersome procedure and can not be considered for use in the motor vehicle during driving. The driver can fix the destination location by selecting the destination from the list of all possible destination locations (destination list) stored in the navigation system. The entry of a destination location not yet contained in the destination list is required only in special cases. The method of selecting the destination has the advantage that the driver need enter only the minimum number of letters and numbers of the destination location which allow an unequivocal assignment to a destination on the destination list. Vocal input would be the ideal method for selecting or entering the destination location but this can not yet be considered at present or in the near future due to the present technical limitations. Selection or entry of the destination location by means of a keyboard, whether this is an alphanumeric complete keyboard or one of the numerous keyboard variants with a reduced number of keys, has the disadvantage that it may be carried out only when the vehicle is stationary, since it would be too distracting for the driver during driving. The word-by-word search ("scrolling") is known as a method for selecting the destination from the destination list; in this method, the destination list in which the destinations are stored alphabetically can be scrolled behind an optical display window by two direction switches. Due to the large number of possible destinations, this method also has an effect which is too distracting to be used during driving.
SUMMARY OF THE INVENTION
The object of the invention is developing a method for selection or entry of destination locations in a navigation system whose distracting effect is so slight that it can also be used when driving.
This object is met, according to the invention, in that the selection or entry of the destination is effected by a position-by-position scrolling of the letters of the alphabet, in that the alphabetic or numerical positions of the destination name are selected in a stepwise manner with a first component of a manual input element, and in that the alphabet is run through per letter position with a second component of a manual input element at a speed or step size which can be varied as desired until the desired letter is reached. The efficiency of the search can be increased by taking into consideration the occurrence probabilities of individual letters and letter groups (e.g. two-digit groups, three-digit groups). In addition to the optical display of the respective selected letter, an acoustic acknowledgement is effected by a vocal output, which constitutes a substantial feature of the method. The two components of the manual input element are preferably integrated in a single input member.
The advantages which can be attained with the invention consist particularly in that the driver can execute a destination input or destination selection in an extensively "blind"during driving, i.e. without claiming too much of his visual attention and, accordingly, without being distracted from the traffic situation in a dang
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IBM Technical Disclosure Bulletin, vol. 21, No. 9, Feb. 1979, "Audio Device for the Blind", Head et al., p. 3776.
"APS Text Search & Retrieval Classroom Manual", Planning Research Corp., May 1987.
Crosland Donnie L.
Robert & Bosch GmbH
Striker Michael J.
Swarthout Brent A.
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