JPH0153792B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an on-vehicle map display device.

In the prior art, for example, an overall map covering all of Japan, a regional map covering each region such as the Kanto region and the Kinki region, and a detailed partial map of each region divided into multiple regions are taken for each frame of a photographic film. be done. This film also has
Control signals are recorded so that each frame, or each map, can be recalled individually. When displaying a desired map, once the desired map is specified, the frame specified by the control signal is called, and the desired map is displayed on the screen mounted on the vehicle using an optical system. However, recording the control signals on film requires advanced technology. Furthermore, it is difficult to mass-produce films on which such control signals are recorded. In other prior art, a card with a map printed on it is prepared and the map is displayed by loading the card at any time.
The loading process is troublesome.

The purpose of the present invention is to solve the above-mentioned technical problems,
To provide an on-vehicle map display device that can mass-produce video recording media, has excellent operability, and can also be used as a video device.

The present invention provides: a video signal recording medium in which a plurality of maps are recorded in correspondence with individual control codes; a designation means provided with a key for designating the control code; and a video signal recording medium in correspondence with the control code. an in-vehicle map display device including a reproduction means for driving a video signal of a designated map and a display means for displaying a map in response to a signal from the designation means; Furthermore, each regional map is divided into a matrix to form a partial map, and a regional map is arranged at the beginning or the last column of each row of the matrix or at the beginning or last row of each other. and a partial map of the local map constitute a chapter for each region, and the partial map and local map to which control codes corresponding to the row numbers and column numbers of the matrix are assigned are stored in the video signal recording medium. When displaying a regional map to which a partial map belongs from an arbitrary partial map by sequentially recording for each chapter, the local map in the same row or column as the partial map in the matrix is displayed. This is an in-vehicle map display device that is characterized by:

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block circuit diagram of one embodiment of the present invention. The in-vehicle map display device 1 includes a video tape 2 as a video signal recording medium, an operation keyboard 3 as a specifying means, a video tape deck 4 as a playback means, a system controller 5 as a control means, and a display means. A CRT (cathode ray tube) display device 6 is included. These videotape 2, operation keyboard 3, videotape deck 4, system controller 5, and CRT display device 6 are mounted on the vehicle.

A plurality of maps are recorded on the videotape 2 in correspondence with individual control codes. For example, there is an overall map that covers all of Japan, a map that divides this overall map into multiple blocks, and multiple regional maps that are maps for each block, and a map that divides each regional map into more detailed segments. A plurality of partial views are prepared. At least roads are described in these overall maps, regional maps, and partial maps. By collecting maps of each region, an overall map is formed.
By collecting each partial map, a regional map and an overall map are formed.

As shown in Figure 2, the regional map corresponds to regions such as the Kyushu region, Shikoku region, and Tokai region, and the Kyushu region is "01", the Shikoku region is "02", the Tokai region is "05", and so on. Chapter numbers are sequentially added to the overall diagram starting from "01". In the partial map, each local map is segmented into a matrix as shown in FIG.
An 8-bit control code is prepared, the lower byte of which corresponds to the row number, and the upper byte of which corresponds to the column number. Control numbers of row numbers and column numbers are sequentially assigned to each part on each local map according to the row and column in correspondence with the control code. Note that "0" in the lower byte and "FF" in the lower and upper bytes are not assigned to a partial diagram. The lower byte "0" is assigned to each local map, and the lower and upper bytes "FF" are assigned to the overall map. Control codes "00" to "FF" constitute one chapter. Each of these maps is recorded on the video tape 2 by a video camera according to the chapter number and control number.

FIG. 4 shows a simplified address map of the frames recorded on the videotape 2 for each map.
In the first frame in the driving direction of the videotape 2, indicated by reference numeral 7, an overall view is arranged and a control code of "FF" is recorded. Then "01"
~ "08" Chapter frames are arranged sequentially. The "01" chapter consists of a frame for a regional map of Kyushu, a frame for a partial map of the Kyushu region, and a frame for an overall map. A frame of a regional map of Kyushu is placed at the beginning of the "01" chapter, and "00"
control code is recorded. At the end of the "01" chapter, a frame of the overall view is placed, and a control code of "FF" is recorded. Regional maps of Kyushu are arranged in frames "10", "20", . . . "FO" where the lower byte of the control code is "0". Control code "01", "02" ~ "OF", "11" ~ "1F",...
Control codes individually corresponding to control numbers are recorded in frames "F1" to "FF".
"02" to "08" chapters, like the "01" chapter, consist of a frame for each regional map, a frame for a partial map of that region, and a frame for the overall map, and "00" to "FF" control code is recorded.
The control codes recorded for each frame are recorded on the audio signal track of the videotape 2 using a tone burst method. By creating a videotape 2 in which each map is recorded and a control code is recorded in this manner, it can be easily duplicated and mass production becomes possible. This videotape 2 is loaded into a videotape deck 4 when a map is displayed.

Note that each frame cannot transition abruptly from forward or backward fast-forward playback of the video tape deck 4 to still image playback, so the same map can be
It is recorded for seconds. In other words, the same map is recorded over 60 frames. Even with this recording, you can record 1800 different maps using a 60 minute tape. In FIG. 4, these 60 frames are shown as one frame for convenience, and it is sufficient if any one of the 60 frames is accessed.

The operation keyboard 3 includes a key 11 for specifying the aforementioned control code. The keys 11 include a hexadecimal key 12 for specifying a control code, a key 13 for specifying an overall map, a key 14 for specifying a regional map, and a key 15 for specifying a partial map. Keys 16, 17, 18, and 19 are used to specify partial views that are adjacent to the displayed partial view in the vertical and horizontal directions, and keys 16, 17, 18, and 19 are used to specify partial views that are in contact with the four vertices of the displayed partial view, respectively. A signal is given from the operation keyboard 3 to the system controller 5 each time each of the keys 12 to 23 consisting of keys 20, 21, 22, and 23 is operated.

The system controller 5 includes a processing device 24,
It has a boat 25 for parallel input/output. The system controller 5 also includes a memory (not shown) in which a program is stored, a memory for storing data, and the like. A signal from the operating keyboard 3 is applied to the processing device 24 via the port 25, and it is determined which key has been operated. Further, the processing device 24 is supplied with a control code signal representing a control code corresponding to each map from the video tape deck 4 for driving the video tape 2 via a port 25. The processing device 24 performs forward fast-forward playback, reverse fast-forward playback, or still image playback on the video tape deck 4 via the port 25 based on signals from the operating keyboard 3 and control code signals from the video tape deck 4. Derive the command signal for.

The video tape deck 4 is an existing video tape deck provided with an interface circuit 26. The interface circuit 26 responds to a command signal from the system controller 5 and operates the video tape deck 4 in a manner equivalent to the operation of an operation switch, without operating an operation switch (not shown) of the video tape deck 4. Further, if the command signal from the system controller 5 is a command signal for forward or reverse fast-forward playback, the servo system of the video tape deck 4 is released and the video tape 2 is transferred onto the video tape deck 4 in the forward or reverse direction. A mute signal for high-speed driving is derived. When videotape 2 is being loaded into videotape deck 4, interface circuit 26 provides a control code signal to the system controller. Also from video tape deck 4
The CRT display device 6 is given a video signal representing a map. When the video tape deck 4 is loaded with a video tape other than the video tape 2, a video signal corresponding to the loaded video tape is supplied from the video tape deck 4 to the CRT display device 6. Therefore, it can also be enjoyed as a video device other than a map display device.

In-vehicle map display device 1 configured in this way
displays the map. When displaying a map with reference to FIG. 5, in a first step n1, the video tape 2 is loaded into the video tape deck 4, the power is turned on by the operation switch of the video tape deck 4, and the second Proceed to step n2. Second
In step n2, the overall view is designated.
That is, the key 13 of the operation keyboard 3 is operated. A command signal for forward or reverse fast-forward playback is given to the video tape deck 4 from the system controller 5. The video tape deck 4 supplies a control code signal to the system controller 5 while driving the video tape 2 at high speed. The control code signal from video tape deck 4 is transmitted to video tape 2.
When the first control code is reached, that is, when the frame with the control code "FF" before the "01" chapter is accessed, the system controller 5 gives the video tape deck 4 a command signal for still image playback. . In this manner, at the third step n3, the entire diagram is displayed on the CRT display device 6 as shown in FIG.

In the fourth step n4, the chapter number of the local map is designated. For example, when specifying the Tokai region, it is sufficient to specify the number "05" for the Tokai region on the overall map displayed on the CRT display device 6. That is, the hexadecimal key 12 of the operation keyboard 3
``0'', ``5'', and key 14 may be operated in this order. A command signal for forward fast forward playback is given from the system controller 5 to the video tape deck 4, and the system controller 5 receives a control code "00" by "+1". This count value is "5"
When the time is reached, the system controller 5 gives a command signal to the video tape deck 4 to reproduce a still image, and the frame "00" of the local map of the Tokai region is accessed. In this way, the fifth step n
5, a regional map of the Tokai region is displayed on the CRT display device 6 as shown in FIG.

In the sixth step n6, the type of display is determined. That is, in the seventh step n7, the control number of the partial map of the Tokai region is designated. For example, when specifying Lake Hamana, it is sufficient to specify the number "47" for the part of Lake Hamana on the local map displayed on the CRT display device 6 as shown in FIG. That is, the hexadecimal key 12 of the operation keyboard 3, "4", "7", and the key 14 may be operated in this order. First, a command signal for fast forward playback in the forward direction is given to the video tape deck 4 from the system controller 5. The system controller 5 gives a command signal for still image reproduction to the video tape deck 4 when the control code signal given from the video tape deck 4 becomes "47". Therefore, frame ``47'' of the partial view of Lake Hamana is accessed. In this manner, a partial view of Lake Hamana is displayed on the CRT display device 6 in the eighth step n8.

In the ninth step n9, when the user approaches the Atsumi Peninsula from Lake Hamana, where the type of display is determined, the key 18 may be operated in the tenth step n10. The system controller 5 decrements the upper byte of the control code by "-1".
First, the system controller 5 gives a command signal for reverse fast-forward playback to the video tape deck 4. When the control code signal given from the video tape deck 4 reaches "37", the system controller 5 gives a command signal for still picture reproduction. Therefore, the frame of the partial view of the Atsumi Peninsula is accessed. In this way, return to the eighth step n8.
A partial diagram of the Atsumi Peninsula is displayed on the CRT display device 6.

Note that when the key 19 is operated, the system controller 5 changes the upper byte of the control code to "+".
Increment by 1. When the key 16 is operated, the system controller 5 decrements the lower byte of the control code by "-1" and the key 16 is operated.
When 7 is operated, the lower byte is incremented by "+1". Also, the system controller 5
When key 20 is operated, the upper byte of the control code is incremented by "+1" and the lower byte is decremented by "-1", and key 2
When 1 is manipulated, the upper byte is incremented by "+1" and the lower byte is incremented by "+1".
Increment. Furthermore, when the key 22 is operated, the system controller 5 decrements the upper byte of the control code by "-1" and increments the lower byte by "+1", and when the key 23 is operated, the upper byte is "-1".
Decrement the lower byte by ``1'' and set the lower byte to ``-''.
1” Decrement. These keys 16-23
By the operation, the display can be easily moved from the partial view displayed on the CRT display device 6 to the partial view in eight directions. It is also possible to move the display to a partial map of a different adjacent region, for example, from a partial map of the Tokai region to a partial map of the Kinki region. In other words, the count value of "00" in the control code of the system controller 5 is decremented by "-1" and the upper byte and lower byte are "+1".
It may be incremented or decremented by "-1".

In order to display the regional map of the Tokai region when the regional map of Lake Hamana is displayed on the CRT display device 6, steps from 9th step n9 to 11th step n are necessary.
Proceed to step 11 and press key 1 in the 11th step n11.
4 is operated. The system controller 5 gives a command signal for reverse fast forward playback to the video tape deck 4. Therefore, the video tape deck 4 supplies the system controller 5 with a control code signal whose lower bytes are sequentially decremented. When the lower byte becomes "0", the system controller 5 gives a command signal for still image reproduction to the video tape deck 4. Therefore, the process returns to the fifth step n5, and the regional map of the Tokai region with the control code "40" is displayed on the CRT display device 6.

Furthermore, since the local map is placed in the lower byte "0" of each chapter, the access time from the partial map to the local map is quick. It is also easy to return to a partial map from a regional map, and access time is quick.

10th step n10 and 11th step n11
If the key 15 is operated after proceeding to step n6, the process proceeds from the sixth step n6 to the twelfth step n12.
That is, when the key 15 is operated after the keys 16 to 23 or the key 14 are operated, the partial view specified in the seventh step n7 is changed to the eighth step n7.
8. For example, if a partial view of Lake Hamana is specified as described above, and the Atsumi Peninsula is later displayed without specification, and the key 15 is operated, a partial view of Lake Hamana will be displayed on the CRT display device 6. The latest specified control code is stored in the memory of the system controller 5. Therefore, it is possible to return to the specified partial view simply by operating the key 15.

FIG. 6 is a block circuit diagram of another embodiment of the present invention, in which parts corresponding to the embodiment shown in the first figure are given the same reference numerals. What should be noted in this embodiment is that the in-vehicle map display device 30 includes a position detector 3.
1, and a video RAM 32 and a mixer 33 are provided as mixing means.

The position detector 31 is a device for determining the current position of the vehicle, and includes a direction detector 34 that detects changes in the direction of the vehicle, and a travel distance detector 35 that detects the distance traveled by the vehicle. The direction detector 34 is, for example, a gyroscope. The mileage detector 35 is
For example, it is a device that derives a pulse signal according to the rotation of a car tire. The current position of the vehicle is detected by the direction detector 34 and travel distance detector.

A position detection signal of 8 bits in each row and column is provided from the position detector 31 to the system controller 5. System controller 5 stores this position detection signal in video RAM 32. The position detection signal stored in the video RAM 32 is applied to the mixer 33 as a video signal representing the current position and travel route. The mixer 33 is also supplied with a video signal representing a map from the video tape deck 4. The mixer 33 mixes the video signal from the video RAM 33 and the video signal from the video tape deck 4 and supplies it to the CRT display device 6. Therefore, a map is displayed on the CRT display device 6 as shown in FIG. 7, and the current position and driving route of the vehicle are displayed as dots on the map. Therefore, the current position and travel route of the vehicle can be easily understood, and the desired destination point can be taken without error by the shortest course.

The system controller 5 also has information about the position of the peripheral part of each map, that is, the position of the X shown by the virtual line in FIG.
The axes X1 to X9 and the Y axis Y1 to Y9 are stored, respectively. As shown in Figure 7, when the car approaches the Atsumi Peninsula from Lake Hamana, that is, when the dot position is on the X5 axis, the Y axis remains constant and the X axis moves from X5 to X4 and from X6 to X5. Ru. The system controller 5 reads the current dot position from the video RAM and determines whether the dot position is X1 to X9 on the X axis and Y1 to Y9 on the Y axis.
I'm always searching to see if it's there. Therefore, the map of the region currently being traveled is automatically accessed without operating the keys 16-23.

As another embodiment of the present invention, the video signal recording medium may be a video disk, a magnetic sheet, etc. In that case, the reproduction means may be of any type as long as it can be controlled by the control means according to the video signal recording medium. Further, the display means may be a television receiver.

As described above, according to the present invention, mass production of video signal recording media can be easily carried out. Furthermore, since a desired map can be displayed by simply operating the keys of the designating means, operability is improved. Furthermore, it can be used as a video device. According to the present invention, a major feature is the method of recording a map on a video signal recording medium, and thereby the display can be quickly switched between a partial map and a local map.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of an embodiment of the present invention.
Fig. 2 is a diagram for explaining the overall map, Fig. 3 is a diagram for explaining the regional map, Fig. 4 is a diagram showing a simplified address map of the frames recorded for each map on videotape, FIG. 5 is a flowchart for explaining its operation, FIG. 6 is a block circuit diagram of another embodiment of the present invention, and FIG. 7 is a diagram for explaining its operation. 1, 30... Vehicle map display device, 2... Videotape, 3... Operation keyboard, 4... Video tape deck, 5... System controller, 6... CRT display device, 11, 13-23... Key, 12... Hexadecimal key , 24... Processing device, 25... Boat, 26... Interface circuit, 31... Position detector, 32... Video RAM, 33... Mixer.

Claims (1)

[Scope of Claims] 1. A video signal recording medium on which a plurality of maps are recorded in correspondence with individual control codes; a designation means having a key for designating the control code; An in-vehicle map display device including a playback means for driving a signal recording medium to output a video signal of a designated map, and a display means for displaying a map in response to a signal from the designation means. dividing into a plurality of local maps, and further dividing each local map into a matrix to form partial maps, and arranging the local map at the beginning or the last column of each row or the beginning or last row of each column of the matrix, The local map and a partial map of the local map constitute a chapter for each region, and the partial map and the local map are stored in the video signal recording medium with control codes corresponding to the row numbers and column numbers of the matrix. When recording is performed sequentially and for each chapter in accordance with the control code, and when displaying a local map to which a partial view belongs from an arbitrary partial view, a local map in the same row or column as the partial view in the matrix is displayed. An in-vehicle map display device characterized in that: