JPH09229707A - Head-up display apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a sufficient view field even when a display is made for a large area, by displaying a display image of a guide route above a road actually seen, with the use of a windshield. SOLUTION: A display part map display-controlling means of a signal- processing part 11 forms a plan map from map data read out from a CD-ROM 5 by a reproducing part 6 and displays the map to a display part 14 after adding data such as the present position, an advancing direction, etc. A head-up display map display-controlling means of the processing part 11 generates a bird's-eye view from the plan map based on a position and a height of a viewpoint and a direction of a line of sight designated by bird's-eye viewpoint-designating data. The head-up display device 1 designates one of the plan map, the bird's-eye view and a course guide map and displays the designated one at an upper part of a windshield 3 by a projector device 4. Accordingly, the display of the map does not overlap with an actual scene in front of the advancing direction and even the display of a large area does not obstruct, a driver's view field, thus ensuring the view field in front of the advancing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-up display device for a navigation device.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 61-200571 discloses
There is disclosed a vehicle traveling position display device that uses a head-up display to make a road map and the current position of the vehicle stand out in the visual field of an occupant in front of the vehicle.

In Japanese Patent Laid-Open No. 1-219883, a road map, which has been coordinate-converted into a perspective display, is projected on a windshield so as to overlap with a driver's view through the windshield at the same distance as a head-up display. A display device for an in-vehicle navigation system having a projection means for displaying is described.

[0004]

The conventional display device, as shown in the conventional display position in FIG. 3, displays the road map and the guide direction mark below the height of the line of sight so that the driver can drive the vehicle. The display image (road map, etc.) can be viewed in a state where the line of sight is hardly moved from the traveling direction.

However, when a display image (road map, etc.) is displayed on the line of sight, the display range is made as small as possible so that the display image does not hinder the forward view.
It is necessary to simplify the display content. Therefore, it is not suitable for displaying a road map or a bird's-eye view in a relatively wide range.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a head-up display device that does not obstruct the field of view even when displaying a large area.

[0007]

In order to solve the above problems, a head-up display device according to a first aspect of the present invention is characterized in that a display image of a guide route is displayed above a road in a scene.

The display image of the guide route may be an image which is vertically symmetrically inverted about the horizontal display axis so that the side closer to the vehicle is the upper side of the display screen and the far side is the lower side of the display screen. Also, the display image of the guide route may be arbitrarily rotated and displayed around the display horizontal axis. The display image of the guide route may be a bird's-eye view.

A head-up display device according to a fifth aspect of the present invention is characterized in that a display image of a guide route is displayed above a road of a scene and a route guidance image is displayed so as to substantially overlap the road of the scene. . The road section corresponding to the road section displayed by the route guidance image is
It is desirable that the guide route is displayed on the display image of the guide route displayed above the road of the scene.

In the head-up display device according to the first aspect, since the guide route is displayed above the road of the scene, even if a large area is displayed, it does not hinder the driver's view.

Also, by displaying the bird's-eye view by flipping it upside down, the entire route is projected and displayed in the sky, and the same display as if a huge mirror is installed in the sky and the ground is viewed. Done. Therefore, it is possible to accurately grasp the situation of the front and the entire route. In a normal bird's-eye view that is not turned upside down, it may be uncomfortable to display an invisible portion of a building or the like, but in a display mode in which the entire route is projected in the sky, the uncomfortable feeling can be resolved.

Since the display image of the guide route is displayed above the road of the scene, the display contents of the route guide image displayed so as to overlap the scene can be simplified. In addition, the display form of the route guidance image and the front scene are strictly overlapped with each other by adopting a display form in which the road segment displayed by the route guidance image and the corresponding segment in the display image of the guide route can be easily compared. Even without it, it becomes easy to grasp the course.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an overall configuration diagram of a head-up display device according to the present invention. A head-up display device 1 according to the present invention includes a navigation device 2 and a projector device 4 that displays an image using a windshield 3.

FIG. 2 is an explanatory diagram showing the positional relationship between the driver and the line of sight, and FIG. 3 is an explanatory diagram showing the display positions of the head-up display device according to the present invention. The head-up display device 1 according to the present invention displays an image at a position above the line of sight of the driver.

The navigation device 2 shown in FIG. 1 includes a CD-ROM 5 storing road map data and a CD-RO.
Map information reproducing unit 6 for reading road map data from M5
A GPS device 7 that receives radio waves from a plurality of GPS satellites and outputs longitude, latitude, and altitude data, a vehicle speed (or mileage) sensor 8, a direction sensor 9, and a VICS.
(Vehicle Information and Communication System) and ATIS (Advanced Traffic Information Service) to obtain the latest traffic information, a communication unit 10, a signal processing unit 11, an operation unit 12, and a voice guidance speaker 13. And a display unit 14 including a CRT, a liquid crystal display device, and the like.

The signal processing unit 11 includes a vehicle position detecting means,
A route setting means, a display portion map display control means, a vehicle guidance control means, an operation input recognition means, and a head-up display map display control means are provided.

The vehicle position detecting means detects the position of the vehicle based on the azimuth signal from the azimuth sensor 9 including a gyro or a geomagnetic sensor and the vehicle speed or mileage signal from the vehicle speed or mileage sensor 8. By using the dead reckoning device that sequentially calculates the vehicle position and the GPS device 7 that detects the absolute position of the vehicle together, the current position of the vehicle can be estimated even when radio waves from GPS satellites cannot be received.
The own vehicle position detecting means compares the traveling locus calculation means for obtaining the traveling locus with the traveling locus data output from the traveling locus calculating means with the road map data to determine the traveling locus of the intersection, the inflection point or the like. A map matching means for correcting the current position of the vehicle on the road by focusing on the characteristic portion is provided.
The vehicle position detecting means outputs the current position data of the vehicle and the traveling direction data.

The route setting means, when the destination, the waypoint and the departure place are input from the operation unit 12, inputs the designated departure place or the current position of the vehicle by referring to the road map data. The route to the ground is automatically set and the set route data is output.

The map display control means for the display unit uses the map information reproduction unit 6 to send the map data including the current position of the vehicle to the CD.
-The map image is read out from the ROM 5 to generate a map image, and the map image including the vehicle position mark is generated based on the current position data and the traveling direction data supplied from the vehicle position detecting means and displayed on the display unit 14. Let

When voice guidance is designated, the vehicle guidance control means, based on the route data and the vehicle position / heading direction data, outputs voice message data relating to the route guidance before the next course change point. By generating and converting the generated voice message data into a voice signal via the voice synthesis output device, and supplying the converted voice signal to the voice guidance speaker 13, for example, "100 meters ahead, turn right." Output a voice message. The vehicle guidance control means, when the guidance on the display image of the display unit 14 is designated, data designating an intersection or the like for course change, route designation data for right turn, left turn, etc., distance data to the route change point. Etc. are supplied to the map display control means for the display unit, and the guide direction mark for the right turn, the left turn, etc. and the character information indicating the distance to the course change point are displayed on the screen of the display unit 14.

The operation input recognition means recognizes various operation inputs made by the operation section 12, sets display conditions and guidance conditions according to the operation inputs, and supplies the set various conditions to each control means. .

FIG. 4 is a block diagram of the map display control means for head-up display. The head-up display map display control means 20 includes a plan map generation means 21, a bird's-eye view generation means 22, and a route guide map generation means 2.
3, display map selection means 24, map image rotation means 25
And image synthesizing means 26.

The plane map generating means 21 is based on the map data 6a read out through the map information reproducing section 6, the map display direction designation data 20a, and the scale designation data 20b, and has the same scale all over the plane map. To generate. When it is specified by the map display direction specification data 20a that the traveling direction of the vehicle is the upper side, the planar map generation means 21.
Generates a plane map in which the traveling direction of the vehicle is directly in front based on the own vehicle position / traveling direction data 20c. For example, when the map display direction designation data 20a designates that the north side is the upper side or the destination (or waypoint) direction is the upper side, the planar map generating means 21 displays the north upper side or the destination direction is the upper side. To generate a planar map. The map display direction and the scale can be specified by the operation unit 12.

When the communication section 10 supplies the congested road section data 20d, the plane map generating means 21 displays the congested section. The plan map generating means 21 sequentially generates plan maps in which the current position of the vehicle is at the lower end of the map or the current position of the vehicle is slightly off the lower end of the map as the vehicle travels. The plane map generating means 21 generates a plane map including a mark indicating the orientation of the map. The plane map generating means 21 generates a plane map displaying the guide route based on the route data (guide route data) 20e.

The bird's-eye view generating means 22 generates a bird's-eye view based on the viewpoint position, viewpoint height, and line-of-sight direction specified by the bird's-eye viewpoint specification data 20f. The position of the bird's-eye view point, the height of the view point, and the line-of-sight direction can be specified by the operation unit 12. By setting the viewpoint position behind the vehicle position in the traveling direction, a bird's-eye view including the current position can be displayed. By setting the viewpoint height high, you can get a bird's eye view of a wide range. By setting the line-of-sight direction other than the traveling direction, it is possible to display a bird's-eye view of other directions. The bird's-eye view generation means 22 uses the congested road section data 20.
When d is supplied, a display indicating a traffic jam section is displayed. The bird's-eye view generation unit 22 generates a map including a mark indicating the orientation of the map. The bird's-eye view generation means 22 generates a map displaying the guide route based on the route data (guide route data) 20e.

The route guide map generation means 23 displays the perspective of the road indicating the intersection position based on the route guidance data (data relating to the distance to the route change point and the route change direction) 20g supplied from the vehicle guidance means. A route guide map including a map and a mark indicating the guidance direction is generated. The route guide map generating means 23 generates a route guide map so that it is substantially overlapped with a front scene (road or the like) when projected on the windshield 3 via the projector device 4.

The display map selecting means 24 selects any one of a plane map, a bird's eye view and a route guide map based on the map selecting data 20h and supplies it to the map image rotating means 25. Which map is selected can be set by the operation unit 12.

An example of the plane map generated by the plane map generating means 21 is shown in FIG. An example of the bird's-eye view generated by the bird's-eye view generation means 22 is shown in FIG. An example of the route guide map generated by the route guide map generation means 23 is shown in FIG.

As shown in FIG. 8, the map image rotation means 25 uses the upper end (or an axis parallel to the upper end) of the generated map as a rotation axis, and only the angle designated based on the rotation angle designation data 20i. Generate a rotated map. The smaller the rotation angle is specified, the more vertically compressed the map is generated. If the rotation is not designated, the map image rotating means 25 supplies the map supplied from the display map selecting means 24 to the image combining means 26 as it is. The map image rotation means 25 performs a rotation process on line segment data such as roads, obtains the display position of the character information after the rotation process for the character information displayed on the map, and displays the character at the obtained display position. Display the characters generated by the generator.

FIG. 9 shows an example of a bird's-eye view in which the map image is rotated by the map image rotating means 25 and the vertical direction is reversed.

The image synthesizing means 26 uses the map selection data 20.
When the route guidance request 20j is supplied in the state where the planar map or bird's-eye view is selected based on h, the planar map or bird's-eye view supplied from the map image rotation means 25 and the route guide map generation means 23 are generated. The route map is combined and the combined map image is supplied to the projector device 4. As shown in FIG. 10, the image synthesizing means 26 synthesizes the plane map or the bird's-eye view above the driver's line-of-sight, and the course guide map below so that it substantially overlaps with the front scene. When the route guidance request 20j is not supplied, the image composition unit 26 supplies the map image supplied from the map image rotation unit 25 to the projector device 4. Whether or not to display the route guidance map so as to substantially overlap the front scene (whether to generate the route guidance request 20j) can be set by the operation unit 12.

When the route guidance request 20j is supplied, the plane map generating means 21 and the bird's-eye view generating means 22 generate a map showing a road region corresponding to a road section displayed on the route guide map based on the guide route data 20g. To generate. In FIG. 10, in the bird's-eye view that is displayed upside down, the corresponding area is displayed by displaying the road area corresponding to the road section displayed in the route guide map with a thick line. The corresponding area may be displayed blinking, or the corresponding area may be hatched.

It should be noted that a vertically inverted map is generated and displayed above the windshield while the vehicle is running, and a non-inverted map is generated and displayed below (or above) the center of the windshield when the vehicle is stopped. You may allow it. By doing so, when the vehicle is traveling, the map display is automatically changed so as not to obstruct the view.

Since the head-up display device 1 according to the present invention has the above-mentioned configuration, any one of the plane map shown in FIG. 5, the bird's-eye view shown in FIG. 6, or the route guide map shown in FIG. Specify the specified map,
As shown in FIG. 5, it can be displayed above the windshield 3. Since the map image is displayed above the windshield 3, the front scene and the map display do not overlap. Therefore, even if a large area is displayed, the driver's field of view is not hindered, and the front field of view can be secured.

The head-up display device 1 can display a map rotated at a desired angle with respect to the rotation axis shown in FIG. 8 by arbitrarily setting the rotation angle. By the rotation display, the vertical length of the displayed map image can be adjusted. Therefore, even in the case of maps of the same display area, it is possible to shorten the length of the display image in the vertical direction to further secure the front view.

Further, the map which is vertically inverted can be displayed by the rotation display. By displaying the bird's-eye view by flipping it upside down, the whole route is projected and displayed in the sky, and it is displayed as if a huge mirror is installed in the sky and the ground is viewed. For this reason,
The situation of the front and the entire route can be accurately grasped. In a normal bird's-eye view that is not turned upside down, it may be uncomfortable to display a part that cannot be seen in the shadow such as a building, but in a display mode in which the entire route is projected and displayed in the sky, the uncomfortable feeling can be resolved.

Further, as shown in FIG. 10, the head-up display device 1 can display a route guide map below the plan view or bird's-eye view above the windshield 3. . Since the area corresponding to the road section displayed on the route guide map is displayed in bold lines in the bird's-eye view, for example, it is easy to compare the two.

In this embodiment, since the traffic jam section is displayed on the map, it becomes easy to take a route avoiding the traffic jam section.

[0039]

As described above, since the navigation device according to the present invention is configured to display the guide route above the road of the scene, even if the map display of a large area is performed, the visibility of the driver is reduced. It does not obstruct and secures the forward field of view.

By displaying the bird's-eye view by flipping it upside down, the entire route is projected and displayed in the sky, and the same display as if a giant mirror is installed in the sky and the ground is viewed. Done. Therefore, it is possible to accurately grasp the situation of the front and the entire route. In a normal bird's-eye view that is not turned upside down, it may be uncomfortable to display a part that cannot be seen in the shadow such as a building, but in a display mode in which the entire route is projected and displayed, the uncomfortable feeling can be resolved.

Since the display image of the guide route is displayed above the road of the scene, the display content of the route guidance image displayed so as to overlap the scene can be simplified. In addition, the display form of the route guidance image and the front scene are strictly overlapped with each other by adopting a display form in which the road segment displayed by the route guidance image and the corresponding segment in the display image of the guide route can be easily compared. Even without it, it becomes easy to grasp the course.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a head-up display device according to the present invention.

FIG. 2 is an explanatory diagram showing a positional relationship between a driver and a line of sight.

FIG. 3 is an explanatory view showing a display position of the head-up display device according to the present invention.

FIG. 4 is a block configuration diagram of map display control means for head-up display.

FIG. 5 is an explanatory diagram showing an example of a plane map.

FIG. 6 is an explanatory diagram showing an example of a bird's eye view.

FIG. 7 is an explanatory diagram showing an example of a route guide map.

FIG. 8 is an explanatory diagram of map image rotation processing.

FIG. 9 is an explanatory diagram showing an example of a bird's-eye view with the top and bottom reversed.

FIG. 10 is an explanatory diagram showing a composite display example of a bird's-eye view and a route guide map which are vertically inverted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 head-up display device 2 navigation device 3 windshield 4 projector device 11 signal processing unit 20 map display control means for head-up display 21 plane map generation means 22 bird's-eye view generation means 23 route guide map generation means 24 display map selection means 25 map image Rotation means 26 Image composition means

Claims (6)

[Claims] 1. A head-up display device for displaying a guide route using a windshield, wherein a display image of the guide route is displayed above a scene road. 2. The display image of the guide route is an image in which the side closer to the vehicle is on the upper side of the display screen and the far side is on the lower side of the display screen, and is vertically symmetrically inverted about the horizontal axis of the display. The head-up display device according to claim 1, wherein: 3. The display image of the guide path can be arbitrarily rotated and displayed with the horizontal axis of the display as an axis.
The head-up display device described. 4. The head-up display device according to claim 1, wherein the display image of the guide route is a bird's-eye view. 5. A head-up display device that projects a guide route using a windshield, displays a guide route display image above a scene road, and displays a route guidance image so that the guide image substantially overlaps the scene road. A head-up display device characterized by displaying. 6. The road section corresponding to the road section displayed by the route guidance image is displayed in the guide route display image displayed above the road of the scene. The head-up display device described.