JP3462537B2 - In-vehicle navigation system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation system, and more particularly to a display method for a display device thereof.

[0002]

2. Description of the Related Art FIG. 5 shows an example of an operation / display unit of a conventionally designed vehicle-mounted navigation system, and FIG. 2 shows an example of a screen displayed on the operation / display unit.

As shown in FIG. 5, in order to move a road map display or the like displayed on the display screen in any direction up, down, left or right by a scroll operation switch 501 arranged on the panel of the display section. Screen scrolling or screen rewriting. For example, in the case of a display screen showing a road map as shown in FIG. 2, in addition to the road map 3, the title display 1 and the operation guide display 2 are also displayed on the display screen in an overlapping manner. in this case,
When the screen is scrolled by the scroll operation switch 501, only the road map display is variably displayed,
The title display and operation guide display are displayed as they are.

[0004]

In the above prior art, even when the road map display screen is scrolled or rewritten in an attempt to search the upward direction or the right direction of the road map display being displayed, Since the state in which the title display and the operation guide display are superimposed on the road map display is maintained, the road map display area is narrowed by these, and there is a problem that the map search work takes time. Also,
This tendency becomes more remarkable as the screen size of the display device is smaller.

Therefore, an object of the present invention is to provide a vehicle-mounted navigation system which makes it easy to see the road map on the display screen in a specific case while the road map is being displayed in order to solve the above problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has an instruction input section for receiving a display instruction from a user and a scroll from the user.
Scroll switch that accepts
When the power unit receives the display instruction, map information and operation
Display the work guide information on the display screen,
The map information and the operation guide information are overlaid and displayed on the surface.
The scroll switch is
When a roll instruction is accepted, the operation is performed from the display screen.
Display control means for erasing the guide information.

The present invention also relates to a vehicle navigation system.
Display method from the system and display instruction from the user
And a step of receiving the display instruction
And a map that displays map information and operation guide information on top of each other.
The step, the map information and the operation guide information are overlaid.
Displayed, the scroll switch is
When the scroll instruction from the
Erasing information.

[0008]

[0009]

[0010]

[0011]

The function input unit receives a display command from the user. The map drawing processing unit stores the road map information and creates a video signal for displaying the road map based on the road map information. The character generator produces a video signal for displaying predetermined character information. The superposition means superimposes the video signals output from the map drawing processing section and the character generation section, and the display section displays the video signals according to the video signals output from the superposition means.

The inhibiting means inhibits the video signal from the character generator from being superimposed on the video signal from the map drawing processor when predetermined.

The predetermined time may be, for example, when the detection means detects a predetermined instruction, when the scrolling instruction of the map information displayed on the display unit is received, or when the vehicle information detection means determines the traveling state. It can be when it is detected.

The inhibiting means can instruct the overlaying means to output only the video signal output from the map drawing processing section in order to inhibit the overlaying. Further, the suppressing means may instruct the character generating means not to output a video signal in order to suppress the superposition.

According to the above configuration, the instruction input section allows
For example, when the screen scroll operation is executed, the map drawing processing unit executes the screen scroll display to generate a video signal for displaying the road map. The inhibiting means inhibits the video signals such as the title display and the operation guide display by the character generation unit from overlapping. As a result, at the same time when the screen scroll is started, the title display and the operation guide display on the display screen are erased, and the road map display area to be searched can be displayed on the entire screen. Similarly, when the running state is detected, the inhibiting means also inhibits the video signals such as the title display and the operation guide display by the character generation unit from overlapping. As a result, when the road map is viewed while driving, information display other than the road map information such as title display and operation guide display can be erased.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 4 is a circuit block diagram showing an embodiment of the present invention. First, the configuration will be described with reference to FIG.
In FIG. 4, the operation switch section 4 corresponds to an instruction input section for the user to control the system. Character generator 6
Generates a character to be superimposed on the road map display. The CRT controller 7 controls the timing of character generation and display. Character data for display is written in the video RAM 8, and RGB video signals for displaying predetermined character information are output. The video RAM 8 stores a video signal for at least one frame, and may include a plurality of frame memories.
The character generator ROM 9 stores a character pattern corresponding to an arbitrary character code in advance. The shift register 10 outputs a switching signal for switching the RGB video signal from the video RAM 8 based on the timing from the CRT controller 7. The map drawing processing unit 11 generates a video signal for displaying a road map based on vehicle position data and data from a storage medium such as a CD-ROM. The RGB changeover switch 12 is a changeover switch for superimposing the video signal generated by the character generation unit 5 on the video signal from the map drawing processing unit 11, and is composed of a switching transistor or the like. The display unit 13 is CR
A display device such as T or LCD. CPU5
Controls the entire system. The CPU 5 controls each block of the character generation unit 6, the map drawing processing unit 11, and the RGB changeover switch 12 based on the operation instruction from the operation switch unit 4. The CPU 5 sends a superimposing punching pulse 15 for superimposing the character information and the map information to the RGB changeover switch 12 to switch between the character information and the map information. What is a punching pulse?
The RGB changeover switch 12 is a control signal for switching and outputting the video signal from the map drawing processing unit 11 and the video signal generated by the character generating unit 5.

A normal display operation will be described with reference to FIG.

When there is a road map display instruction from the operation switch section 4, the CPU 5 draws in the video RAM 8.
Character data of a predetermined title display 1 and operation guide 2 is written based on a character pattern recorded in the character generator ROM 9. CPU5
At the same time, instructs the map drawing processing 11 to display the map information and the like designated by the operation switch unit 4. In the map drawing processing 11, map information and the like are output as RGB signals and input to the RGB changeover switch 12. The shift register 10 sends the timing corresponding to the RGB signals based on the timing from the CRT controller 7. The character data written in the video RAM 8 is output as an RGB signal, and passes through the gate circuit according to the timing from the shift register 10.
It is input to the RGB changeover switch 12. The RGB changeover switch 12 is switched according to a punching pulse for superimposing from the CPU 5 so that the character information is displayed by being superimposed on the map information. The timing of outputting the punching pulse is predetermined according to the position where the character information is displayed. Character information is selected when the punching pulse is output, and map information is output when the punching pulse is not output. As a result, character information such as a title display is displayed on the map information as shown in FIG.

The processing procedure of the present invention will be described below with reference to the flow chart shown in FIG. FIG. 1 shows a flowchart of the processing operation in this embodiment.

In FIG. 1, when there is an instruction to display a road map from the operation switch section 4, the CPU 5, as described above,
The title display and the operation guide display are displayed in an overlapping manner on the road map (block 1). The CPU 5 detects that the user has performed a map screen scrolling operation via the operation switch 4 during the display (block 2). As the operation switch 4, there is a cursor switch such as the scroll operation switch 501 as shown in FIG. The CPU 5 detects that these cursor switches have been pressed. When the CPU 5 detects that the cursor switch has been pressed, the CPU 5 controls the CRT controller 7 and the RGB changeover switch 12 in the character generator 6 to erase the title display and the operation guide display from the road map display. Yes (block 3). Specifically, only the map information is output by suppressing the sending of the punching pulse for superimposing. Alternatively, the CPU 5 may control so that the video signal of the character information is not output from the character generator 6. A display example in this case is shown in FIG. As shown in FIG. 3, during the screen scrolling or screen rewriting operation, only the map information is displayed and the character information is not displayed.

When the CPU 5 determines that the map scroll operation is continuing (block 4), the block 3
While maintaining the state of, the road map scroll display is continued and only the map information is displayed (block 5). When the CPU 5 detects that the map scroll operation is completed (block 4), the CPU 5 causes the character generation unit 6 to execute the title display and the character generation of the operation guide, and outputs the punching pulse for superimposing. It is sent out and the display state of the block 1 is changed.

In the block 4, the title display and the operation guide display may be erased even after the map scroll operation is completed. In this case, when an operation switch other than the scroll operation switch 501 is operated, the process may shift to block 1 to display the title or the operation guide.

As described above, according to the vehicle-mounted navigation system in this embodiment, the map display area is maximized by deleting the title display and the operation guide display when the display screen is scrolled or rewritten. be able to. As a result, an improvement effect that the time required for map search can be shortened can be obtained.

Further, as another embodiment, the timing of erasing the title display, the operation guide display, etc. may be the time when the traveling of the vehicle is detected instead of detecting the operation of the scroll operation switch described above. For example, the character information may be erased when the vehicle speed sensor detects that the vehicle has changed from a stopped state to a traveling state or has detected that the vehicle has changed from a traveling state to a stopped state. Further, the gear position may detect that the gear has changed from the neutral state (stopped state) to the driving state (running state). The detected information is input to the CPU 5 as the vehicle information 16 via the interface circuit 17. The operation in this case can be similarly processed by changing the timing of erasing the character information according to the flowchart shown in FIG. 1 in the above-described embodiment. In this case, the CPU 5 refers to the vehicle information instead of the block 2 in FIG. 1 and determines whether or not the vehicle is in the traveling state from the stopped state. When the running state is changed from the stopped state, the operation of block 3 in FIG. 1 is performed,
Delete text information. Further, instead of the block 4, it is determined whether or not the running state is stopped, and when the running state is stopped, the block 1 in FIG.
The operation of can be performed and the character information can be displayed.

Further, a function key for instructing deletion may be provided as a timing for deleting the title display, the operation guide display and the like. In this case,
A switch for instructing deletion is assigned to the function keys A to E on the operation panel as shown in FIG. 6, and when the user does not need to display the title display or the operation guide display, the function key assigned the deletion instruction. The CPU 5 may be controlled to delete the character information by pressing. Further, when the assigned function key is pressed while erasing the character information, the character information may be controlled to be displayed.

Further, a plurality of timings for deleting the above-mentioned character information may be defined in advance so that the user can select.

As described above, according to the vehicle-mounted navigation system in the above embodiment, the title display and the operation guide display can be erased at a predetermined timing such as a running state. This allows
When the user wants to make the map display area as large as possible, the character information can be deleted.

[0029]

According to the present invention, in a vehicle-mounted navigation system, a road map on a display screen can be easily viewed in a specific case while the road map is being displayed.

[Brief description of drawings]

FIG. 1 is an operation flowchart showing a characteristic part of the present invention.

FIG. 2 is an explanatory diagram showing a display example when a title display and an operation guide display are overlaid on a road map display.

FIG. 3 is an explanatory view showing a display example in a state (screen scroll or screen rewriting) in which the superimposed title display and operation guide display from FIG. 2 are erased.

FIG. 4 is a block diagram of a vehicle-mounted navigation system showing an embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an example of an operation / display unit of a vehicle-mounted navigation system.

[Explanation of symbols]

1 ... Title display example, 2 ... Operation guide display example, 3 ... Road map display example, 4 ... Operation switch section, 5 ... System control CPU, 6 ... Character generating section, 7 ... CRT controller, 8
… Video RAM, 9… Character generator RO
M, 10 ... Shift register, 11 ... Map drawing processing unit, 1
2 ... RGB video signal switching circuit section, 13 ... Display.

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) G09B 29/00-29/14 G01C 21/00 G06F 3/14 360 G08G 1/0969

Claims (2)

(57) [Claims] 1. An instruction input unit for receiving a display instruction from a user and a scroll screen for receiving a scroll instruction from the user.
Switch and the instruction input unit receives the display instruction,
Information and operation guide information overlaid on the display screen,
The map information and the operation guide information are displayed on the display screen.
When they are displayed in a stack, the scroll switch
Receives the scroll instruction, the display screen
And a display control unit for erasing the operation guide information . 2. A display provided by an in-vehicle navigation system
A method for receiving a display instruction from a user , and receiving the display instruction , the map information and the operation guide.
The step of superimposing the display information and the map information and the operation guide information are displayed in a superposed manner.
The scroll switch from the user
When the roll instruction is accepted, the operation guide information is deleted.
And a step of performing.