JPH1062182A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable simultaneous display and instantaneous changeover of a plurality of moving images, by installing a plurality of storage means (memories) or the like in which a plurality of kinds of navigation data (map data or the like) are written. SOLUTION: By previously designating two kinds of reduced scales of maps by a key input circuit or the like, data of two kinds of scale maps are read from a map disk 1 at a speed twice or more the ordinary navigation processing speed. A signal processing and data controlling circuit 5 detects the reduced scale of the map data, map data of two kinds of reduced scales which are previously designated are written is storage devices 6 and 7, respectively. Image display circuit 8 processes the data, on the basis of the map data written in the storage devices 6 and 7. In the case of display command of two images, an image which simultaneously indicates two map data is displayed on the whole image plane of a display 10. In the case of display command of one image, map image of the reduced scale which is designated out of the map data in the storage devices 6 and 7 is displayed on the whole image plane of the display 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system, and more particularly to a navigation system capable of simultaneously displaying or instantaneously switching two moving image navigation screens.

[0002]

2. Description of the Related Art A conventional navigation system is configured, for example, as shown in FIG. That is, in FIG. 3, 31 is a map disk (CD-ROM or the like) containing navigation data, 32 is a motor for rotating the map disk 31, 33 is a pickup for reading data from the map disk 31, 34 is a servo circuit, and 35 is a servo circuit. A signal processing circuit for processing data from the map disk 31;
6 is a memory for writing data from the signal processing circuit 35,
37 processes the data in the memory 36 to generate a display screen,
A screen display circuit for switching, a microcomputer 38 for controlling the operation of the entire system, and a display 39 for displaying navigation data on the screen.

[0003]

In the conventional navigation system having the above structure, when two maps are simultaneously displayed on the screen of the display 39, one map is provided as a moving image, while the other map is provided as a moving image. When the screen display was specified, the map data was only displayed as a still image. When the screen is switched, for example, when the scale of the map is changed, a screen switching instruction is issued, the map data is once written from the map disk 31 to the memory 36, and then read from the memory 36 to be displayed on the screen. There was a problem that it took time.

An object of the present invention is to solve the above-mentioned conventional problems and to provide a navigation system capable of simultaneously displaying two moving images and switching instantaneously.

[0005]

A navigation system according to the present invention comprises a navigation data recording medium,
Reading means for reading the specified two types of navigation data at a speed twice or more the normal navigation processing speed; first and second storage means for writing the two types of navigation data from the reading means, respectively; Screen processing means for processing the two types of navigation data from the second storage means for screen display to perform two-screen display or screen switching; and display means to which an output of the screen display processing means is supplied. It is provided with.

[0006] Further, the navigation system according to the present invention provides a designated 2
Reading means for reading out two types of navigation data at a speed twice or more the normal navigation processing speed, first and second storage means for writing the two kinds of navigation data from the reading means, respectively, Screen display processing means for processing navigation data from the storage means and data other than the navigation data for screen display to perform two-screen display or screen switching, and display means to which an output of the screen display processing means is supplied It is provided with.

[0007]

The specified two types of navigation data are read out from the navigation data recording medium at a speed twice or more the normal navigation processing speed, and these two types of navigation data are written into the first and second storage means, respectively. Then, the two types of navigation data from the first and second storage means are processed for screen display by the screen display processing means and supplied to the display means to perform two-screen display or screen switching.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a navigation system according to the present invention will be described below with reference to the schematic configuration diagram of FIG. 1 and the flowchart of FIG. In FIG. 1, reference numeral 1 denotes a map disk on which navigation data, for example, map data, is recorded. Reference numeral 2 denotes a motor for rotating the map disk 1 so as to read the navigation data at a speed twice or more the normal navigation data processing speed. Is a pickup, 4 is a servo circuit, 5 is a signal processing and data control circuit for processing data from the map disk 1 and writing it to a memory designated in advance, 6 is a memory for writing data of the first screen, and 7 is a memory for writing data of the second screen. A memory for writing data, 8 is a screen display circuit for processing data in the memories 6 and 7 to generate and switch display screens, 9 is a microcomputer for controlling the operation of the entire system, and 10 is a display for displaying a navigation screen. It is.

The outline of the operation of the navigation system having the above configuration is as follows. First, two types of map scales to be displayed are designated in advance by a key input circuit (not shown) or the like, so that map data of two types of scales are read from the map disk 1 at a speed twice or more the normal navigation processing speed. By detecting the scale of the map data by the signal processing and data control circuit 5, map data of two kinds of scales designated in advance are written into the memories 6 and 7, respectively. Next, by specifying whether the screen to be displayed by the key input circuit is one screen or two screens, and in the case of one screen specification, by further specifying which scale map is to be displayed, the screen display circuit 8 Data is processed based on the map data written in the memories 6 and 7, and when the two-screen display is designated, a screen in which two map data are simultaneously displayed (for example, horizontal split display, vertical split display, etc.), one-screen display When designated, the map screen of the designated scale out of the map data in the memories 6 and 7 is displayed on the display 10 in full screen.

Next, the above operation will be described in detail with reference to the flowchart of FIG. First, in step S1, two types of map scales to be displayed by a key input circuit (not shown) or the like, for example, scale 1 and scale 2, are designated. Then, in step S2, the map disk 1 is displayed at twice or more the normal processing speed. Read map data at speed. Next, step S3
Then, the signal processing and data control circuit 5 detects the scale of the two types of map data read from the map disk 1.
If the detected scale is scale 1, the process proceeds to step S4, and the map data of scale 1 is supplied to the memory 6 and written. On the other hand, if the detected scale is scale 2, step S5
The map data of the scale 2 is supplied to the memory 7 and written therein. After step S4 or S5, step S
6. The microcomputer 9 determines whether the screen display specified in advance by the key input circuit or the like is a two-screen display or a one-screen display.
If the two-screen display is designated, the process proceeds to step S7,
The screen display circuit 8 reads the map data from the memories 6 and 7, processes the map data for two-screen display (for example, horizontal split display, vertical split display, etc.) and supplies it to the display 10 for two-screen display. If one screen is specified in step S6, the process proceeds to step S8, and the microcomputer 9 determines whether the scale specified in advance by the key input circuit or the like is scale 1 or scale 2.

If the answer in step S8 is scale 1, the process proceeds to step S9, where the screen display circuit 8 reads the map data of scale 1 from the memory 6, processes the map data for one-screen display, supplies it to the display 10, and displays the full-screen. Perform If the answer in step S8 is scale 2, the process proceeds to step S10, where the screen display circuit 8 reads the map data of scale 2 from the memory 7, processes it for one-screen display, supplies it to the display 10, and displays the full-screen display. Do.

In this manner, map data of different scales can be continuously written and read into the memories 6 and 7 simultaneously, so that two scale maps can be simultaneously displayed on the display 10 or instantly switched and displayed. Or you can.

[0013]

According to the present invention, map data for two screens is read at a speed of one screen data reading speed for normal navigation.
One screen can be used as navigation data such as a map, and the other screen can be used as a menu screen or data search screen other than the navigation data. Simultaneous screen display and instantaneous switching are possible.

[0014]

According to the present invention, it is possible to perform two-screen display and instantaneous switching of two moving image navigation screens, or to perform two-screen display and instantaneous switching of navigation data and other data.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing one embodiment of a navigation system according to the present invention. Embodiment of the present invention

FIG. 2 is a flowchart illustrating the operation of the navigation system in FIG. 1;

FIG. 3 is a schematic configuration diagram illustrating an example of a conventional navigation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Map disk 2 Motor 3 Pickup 4 Servo circuit 5 Signal processing and data control circuit 6 Memory 7 Memory 8 Screen display circuit 9 Microcomputer 10 Display

Claims (2)

[Claims] 1. A reading means for reading two kinds of designated navigation data from a navigation data recording medium at a speed twice or more a normal navigation processing speed, and a first means for writing two kinds of navigation data from the reading means, respectively. And second storage means, screen display processing means for processing the two types of navigation data from the first and second storage means for screen display and performing two-screen display or screen switching, and the screen display And a display unit to which an output of the processing unit is supplied. 2. A reading means for reading two kinds of designated navigation data from a navigation data recording medium at a speed of twice or more of a normal navigation processing speed, and a second means for writing two kinds of navigation data from the reading means, respectively. First and second storage means, and screen display processing means for processing navigation data from the first or second storage means and data other than the navigation data for screen display to perform two-screen display or screen switching And a display unit to which an output of the screen display processing unit is supplied.