JP2739267B2 - Car navigation system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device, and more particularly, to an on-vehicle navigation device for displaying map information on a monitor screen at high speed. 2. Description of the Related Art By displaying own vehicle position information obtained from GPS information or the like and map data information stored in a CD ROM on a monitor screen such as a liquid crystal display, the information is displayed.
In recent years, the spread of in-vehicle navigation devices that allow the user to visually confirm the position of the vehicle and grasp the route to the destination has been expanding. [0003] In this kind of conventional on-vehicle navigation device, the position of the own vehicle obtained from, for example, GPS information is superimposed and displayed on a map read from a CDROM and displayed on a monitor, for example. Therefore, the driver determines the traveling direction of the vehicle based on the cursor position indicating the own vehicle position displayed on the monitor display screen and the destination, and causes the vehicle to travel. The map screen displayed on the monitor screen is usually displayed by applying a closed area filling process for each area on the map for the purpose of, for example, visually distinguishing land and sea from each other. [0004] As described above, the conventional in-vehicle navigation device displays a map screen and a cursor indicating the position of the vehicle on a monitor, and the map screen is used for discrimination for each area. Different colors are colored. Conventionally, in order to perform such colored display, background drawing and closed area filling processing are performed (first processing), and a diagram for drawing boundaries of each area is created (second processing). A predetermined closed area filling process has been performed (third process). However, since it takes time for the closed region filling process, the first to third processes are performed as described above.
It takes time to perform the processing to generate the final display screen data. For this reason, high-speed display cannot be performed, and the convenience for the driver may be poor. In particular, if the driver is relatively familiar with the terrain and geographic information for the current vehicle position area, the only information required for the driver is road information,
Color display is not so necessary. Accordingly, an object of the present invention is to provide an on-vehicle navigation device capable of rapidly displaying map information on a monitor. [0007] In order to solve the above-mentioned problems, a vehicle-mounted navigation device according to the present invention is a vehicle-mounted navigation device which displays vehicle position information together with map information on a monitor screen. First means for outputting, as map information, data on which an area-corresponding closed area filling process has been performed to the monitor and displaying the data, and as map information, data having not been subjected to an area-corresponding closed area filling process. A second means for outputting to and displaying on the monitor and a third means for selectively operating the first means and the second means are provided. According to the present invention, when the user does not need to display the color corresponding to the area on the map, the skeleton map is displayed only on the line diagram without displaying the closed area, and the map information is displayed. High-speed monitor display. Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a flowchart showing a processing procedure in a vehicle-mounted navigation device according to the present invention, and FIG. 2 is a block diagram showing a basic configuration of the embodiment device. First, the configuration of this device will be described with reference to FIG. The CPU 1 performs various controls as described below according to a program stored in the ROM 2. CD
The ROM disk 11 stores various map data relating to each region according to the scale or the like as a map database. The map database is read by the CDROM player 4 and sent to the CPU 1. CDRO
The map information read from M11 is specified by a control signal from CPU 1 responding to an input from key input device 5. The GPS receiver 6 receives, for example, a GPS (Global Positioning System) received via the antenna ANT.
Received radio signals for position determination from artificial satellites,
The vehicle position information and its position accuracy information are obtained, and the CPU 1
To send to. The key input device 5 is used to start the device, select an operation mode, and the like. For example, the key input device 5 selects an area to be selectively displayed, a scale, and also gives an instruction such as setting of a destination described later. , The instruction signal is sent to the CPU 1. The CPU 1 receives the above-mentioned various signals and
A predetermined signal processing is performed using M3, and the display control device 7
Display control processing. Display control device 7
Is map data information read from the CDROM 11,
Receiving cursor information indicating the position of the vehicle, destination information, and the like generated by the CPU 1, performing processing for screen display, storing it in a video memory (VRAM in this example) 8, and displaying necessary for screen display. Generate a timing signal. The image data read from the video memory 8 is converted into an NTSC analog video signal by a D / A converter 9.
The screen is displayed on a monitor 10 such as a liquid crystal display. In this embodiment, on the premise of the above configuration, when the driver (user) operates the changeover switch of the key input device 5 when the display for each color is unnecessary, the first processing and the second processing are performed. A process is performed in which the closed region filling process in the three processes is omitted, and only information such as a region boundary is displayed as a skeleton map. At this time, about the road,
Since the data is stored in the CD ROM 11 as color-specific data in advance and displayed as it is, there is no problem in operation. The processing procedure of this embodiment will be described with reference to FIG. When the display process is started, first, it is determined whether or not the changeover switch of the key input device 5 is “ON” (selection of omission of the closed area painting process) (step S1). Then, a map that has been subjected to the closed area filling process is displayed on the monitor in correspondence with the area. That is, in step S2, after drawing a background and performing a diagram processing for displaying boundaries between regions (step S3), a closed region filling process is performed (step S4), and a map in which colors are distinguished for each region is performed. The screen is displayed on the monitor (step S5). On the other hand, when the changeover switch is in the "ON" state in step S1, it is determined that the colored display is unnecessary, and the line drawing process for creating a line indicating the boundary between the regions without performing the closed region filling process is performed. Thereafter (step S6), the skeleton map is displayed on the monitor (step S5). As described above, the in-vehicle navigation apparatus according to the present invention does not perform the closed area filling process when the user does not need to display the color corresponding to the area on the map. Since the skeleton map is only displayed on the monitor, the monitor display of the map information at high speed becomes possible, and the usability is greatly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a processing procedure showing an embodiment of a vehicle-mounted navigation device according to the present invention. FIG. 2 is a block diagram showing a basic configuration example of a vehicle-mounted navigation device according to the present invention. [Description of Signs] 1 CPU 2 RO
M3RAM4CD
ROM player 5 Key input device 6 GP
S receiver 7 Display control unit 8 Video memory 9 D / A converter 10 Monitor 11 CDROM disk

Claims (1)

(57) [Claims] An on-vehicle navigation device that displays own vehicle position information together with map information on a monitor screen, wherein, as the map information, data on which a closed area filling process corresponding to an area has been performed is displayed on the monitor. First means for outputting and displaying, and as the map information, second means for outputting, to the monitor, data which has not been subjected to an area-corresponding closed area filling process, and displaying the data, And a third means for selectively operating the second means.