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    • 2. 发明授权
    • Display system in navigation apparatus
    • 导航装置中的显示系统
    • US5121326A
    • 1992-06-09
    • US666485
    • 1991-03-06
    • Shuzo MorotoShoji YokoyamaMitsuhiro NimuraAkimasa NanbaTakashi YamadaKoji Sumiya
    • Shuzo MorotoShoji YokoyamaMitsuhiro NimuraAkimasa NanbaTakashi YamadaKoji Sumiya
    • G01C21/36
    • G01C21/367G01C21/3673G01C21/3682
    • A display system in a navigation apparatus according to the invention has course searching means (13) for searching out an optimum course based on position information, node data (21), intersection data (19) and road data (23), and scale ratio setting means (15), wherein the scale ratio of a displayed map is set in conformity with distance between a present position and a destination, and roads are selectively displayed on a display unit (31) in conformity with the scale ratio.Further, the invention has a data processing controller (46) for performing processing based on a departure intersection entered at an input unit (43), a display unit for displaying, based on the results of processing, an intersection diagram comprising the departure intersection, a peripheral road network and landmarks, and touch keys (35) such as a verification key for displaying direction of travel on the displayed intersection map, and a rotation instruction key for rotating and displaying the intersection diagram.In addition, the invention includes display means (48) for displaying an intersection diagram, in which direction of travel is pointed upward, and intersection landmark patterns, map data (53) stored as a relationship among roads, intersections and intersection landmarks, and as coordinated, and a data processing controller (46) for reading, from the map data (53), positional coordinates of an intersection landmark to be displayed, rotating and enlarging the positional coordinates and transforming them into coordinates of a display area set on the display means, and sending an output signal to the display means (48) in such a manner that the intersection landmark patterns are displayed on the transformed coordinates.
    • 5. 发明授权
    • Navigation apparatus for vehicle
    • 车辆导航装置
    • US5122961A
    • 1992-06-16
    • US408487
    • 1989-08-23
    • Yasuhiro ToyamaTakashi Yamada
    • Yasuhiro ToyamaTakashi Yamada
    • G08G1/0969G01C21/00G01C21/28G08G1/137
    • G01C21/28
    • A navigation apparatus for a vehicle includes a vehicle speed sensor (1-a) for detecting an actual vehicle speed, an odometer (1-b) for detecting a travel distance of the vehicle, a processing unit (5) for calculating a present position from the detection signals from the vehicle speed sensor and the odometer, and a display means for displaying the calculated present position on a map displayed. The actual vehicle speed is compared with an angular velocity of the wheel obtained by the odometer (1-b), and, only when the difference between the actual vehicle speed and the angular velocity of the wheel exceeds a predetermined value, the travel distance is calculated using the actual vehicle speed. The actual vehicle speed sensor (1-a) may include two photosensors. The vehicle speed is operated using the degree of coincidence of the two waveforms. Furthermore, the travel distance is calculated after the vehicle has travelled a fixed distance or for a fixed period of time.
    • PCT No.PCT / JP88 / 01305 Sec。 371日期1989年8月23日 102(e)日期1989年8月23日PCT提交1988年12月23日PCT公布。 公开号WO89 / 06345 日期:1989年7月13日。一种车辆用导航装置,具备用于检测实际车速的车速传感器(1-a),用于检测车辆的行驶距离的里程表(1-b),处理单元 5),用于根据来自车速传感器和里程表的检测信号计算当前位置;以及显示装置,用于在所显示的地图上显示所计算的当前位置。 将实际车速与由里程表(1-b)获得的车轮的角速度进行比较,并且仅当实际车速与车轮的角速度之间的差超过预定值时,行驶距离为 用实际车速计算。 实际的车速传感器(1-a)可以包括两个光传感器。 使用两个波形的一致程度来操作车速。 此外,在车辆行驶固定距离或固定时间段之后计算行驶距离。