JP4476741B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a vehicle display device that displays a running road shape on a display means.

  2. Description of the Related Art Conventionally, a head-up display device that displays a virtual image by projecting light emitted from a display unit (display unit) onto a vehicle windshield (projection member) as a display image is known as a vehicle display device (patent). Reference 1). The display unit is, for example, a housing in which a display composed of a liquid crystal display or the like and a reflecting mirror that reflects the display image emitted from the display are accommodated in a dashboard of a vehicle. It is what is done. The display image projected by the display unit and the windshield are reflected from the viewpoint of the driver, and the virtual image is displayed. According to this configuration, it is possible to display various information such as vehicle information such as vehicle speed and engine speed and navigation information on the windshield as the virtual image.

Moreover, what displays the shape of a runway ahead seen from the viewpoint of a vehicle driver is known in the above-mentioned display apparatus for vehicles (refer patent document 2). According to such a display device for a vehicle, the driver can display the runway shape displayed even when it is difficult to see the actual runway shape due to the influence of weather conditions, a curve of the runway, surrounding vehicles, buildings, and the like. From this, the actual shape of the runway can be grasped.
JP 11-310055 A JP 2000-211142 A

  However, in such a display device for a vehicle, although it is possible to effectively express a road shape such as a curve curve or a road width, it is difficult to represent the road shape in a three-dimensional manner as a display image L. There is a problem that the driver cannot easily determine whether the vehicle is downhill or the slope.

  Accordingly, an object of the present invention is made by paying attention to the above-described problems, and it is an object of the present invention to provide a vehicle display device that can easily recognize the gradient of a running road.

The display device for a vehicle according to the present invention includes a display unit that displays a road shape based on map information including three-dimensional information stored in a map information storage unit, a position detection unit that detects a current position of the vehicle, and the position Control means for reading the map information on the basis of the current position of the vehicle detected by the detection means and displaying the shape of the road on the front side of the vehicle on the display means, the vehicle display device comprising: The control means emphasizes the height difference and causes the display means to display the runway shape on the display means, and the slope of the runway shape to be displayed on the display means indicates a virtual horizontal plane in contact with the change portion from the down to the up The display unit is displayed .

  According to a second aspect of the present invention, in the vehicular display device according to the first aspect of the invention, the control means has a running path shape in which the scale in the height direction is larger than the scale in the width direction. It is characterized by being displayed.

Further, the control means is characterized in that an indicator portion having a grid-like alignment of a predetermined region virtually provided to indicate a horizontal plane is displayed on the change portion .

Further, the control means displays the running road shape in a display color set according to a gradient.

  Further, the display means includes a head-up display that projects and displays a display image on a windshield of the vehicle or a combiner provided between the windshield and the driver.

  The present invention relates to a display device for a vehicle that displays the shape of a runway by display means mounted on the vehicle, and can provide a display device for a vehicle that can easily recognize the gradient of the runway.

  Hereinafter, an example in which the vehicle display device of the present invention is applied to a vehicle head-up display device will be described with reference to the accompanying drawings.

  In FIG. 1 and FIG. 2, reference numeral 1 denotes a display unit, which is disposed in the dashboard of the vehicle A. The display image L projected by the display unit 1 is reflected in the direction of the viewpoint D of the driver by the windshield W that has been subjected to the combiner process, and is displayed as a virtual image V. The driver can observe the virtual image V superimposed on the landscape.

  Reference numeral 2 denotes a display (display means), and the display 2 comprises a TFT type liquid crystal display element and a backlight means. Reference numeral 3 denotes a circuit board, and the display 2 is mounted on the circuit board 3. Reference numeral 4 denotes a reflecting mirror. The reflecting mirror 4 reflects the display image L emitted from the display 2 to the windshield side W. The reflecting surface 4a of the reflecting mirror 4 is concave, and the display image L from the display 2 can be enlarged and projected onto the windshield W. Reference numeral 5 denotes a holding member, and the reflecting mirror 4 is bonded to the holding member 5 with a double-sided adhesive tape. The display 2 is not limited to a configuration including a liquid crystal display element, and may be a configuration including an organic EL display panel, for example.

  Reference numeral 6 denotes a housing. The housing 6 accommodates the display 2, the circuit board 3, the reflecting mirror 4, and the like. The housing 6 is provided with a translucent cover 7 through which the display image L passes. The translucent cover 7 is made of a translucent resin such as acrylic and has a curved shape. The housing 6 is provided with a light shielding wall 6a to prevent a phenomenon (washout) in which external light such as sunlight is incident on the display 2 and the virtual image V becomes difficult to see.

  FIG. 3 is a block diagram showing an electrical configuration of the vehicle head-up display device. The vehicle head-up display device is mounted on a vehicle A, and includes a speed sensor (vehicle speed detection means) 10, a GPS (Global Positioning System) device 11, a gyro sensor 12, a storage medium (map information storage means) 13, The operation unit 14, the control unit 15, the display drive circuit 16, and the display 2 are mainly configured.

  The speed sensor 10 is for detecting the traveling speed of the vehicle A, and outputs a signal corresponding to the vehicle speed to the control means 15.

  The GPS device 11 is a device for obtaining the latitude and longitude of the vehicle position (the current position of the vehicle A), and includes GPS reception antennas and amplification circuits, and is position information from an artificial satellite received by the reception antenna. A signal obtained by amplifying the transmission radio wave as a high frequency signal is output to the control means 15.

  The gyro sensor 12 is for detecting the vehicle body direction (traveling direction) of the vehicle A, and outputs a signal corresponding to the direction change of the vehicle A to the control means 15.

  The storage medium 13 is configured by a CD-ROM, DVD-ROM, hard disk, or the like, and stores digital map data (map information) composed of map data and three-dimensional coordinate information (three-dimensional information) for indicating the shape of the runway. The digital map data is used when a drawing process (to be described later) by the control means 15 is performed. The digital map data includes a road shape data indicating the shape of the road, height data indicating the height, inclination data indicating a right and left (width direction) inclination of the road, and a front and rear (longitudinal direction) inclination of the road. Gradient data indicating (gradient), curvature data indicating the curvature of the road, and the like are provided for each predetermined position (predetermined longitude / latitude) of the road.

  The operation means 14 has a plurality of switches such as a selection key and a determination key, and switches the display form or display setting of a road shape image (drawing processing of each three-dimensional coordinate information of the road) to be described later. Is. Further, the driver can select display or non-display of the runway shape image as the display setting, or display each set value when the runway shape image is displayed by operating the operation unit 14. The contents displayed by the device 2 can be arbitrarily set.

  The control means 15 can be a microcomputer, and includes a ROM that stores a processing operation program, a RAM that temporarily stores calculation values, an EEPROM that stores various preset values, and executes the programs. This is mainly composed of a CPU for performing the above and an input / output interface circuit. The input / output interface circuit is a circuit for establishing an electrical connection relationship with the speed sensor 10, the GPS device 11, the gyro sensor 12, the storage medium 13, the operation means 14, and the display drive circuit 16 described later. . The control means 15 outputs a control signal to a display drive circuit 16 to be described later based on the input from each mechanism (10 to 14) and the program, and prompts the display 2 for a desired display.

  The display driving circuit 16 is a circuit for supplying a display signal to the display device 2 and is configured by an IC or an LSI. The display driving circuit 16 drives and controls the display 2 so as to perform a predetermined display based on a signal from the control means 15.

  The display device 2 includes a TFT type liquid crystal display element and backlight means, and is driven and controlled by the display drive circuit 16 so as to emit a display image L. The display device 2 projects a desired display form such as a road shape image onto the windshield W as a display image L by the display drive circuit 16.

  With the above configuration, the control unit 15 calculates the vehicle position coordinates and the vehicle direction based on the signals from the position detection unit 17 including the speed sensor 10, the GPS device 11, and the gyro sensor 12, and the front of the vehicle The runway shape corresponding to the side (traveling direction side) can be displayed on the display 2 via the display drive circuit 16 based on the digital map data stored in the storage medium 13.

  Next, drawing of the display image L by the control means 15 will be described with reference to FIGS.

  FIG. 4 shows processing by the control means 15. 5 and 6 show examples of display screens that are projected and displayed on the windshield surface by the display unit 1 with the traveling road shape on the front side (traveling direction side) of the vehicle A as a display image L.

  The control means 15 calculates the vehicle position coordinates and the traveling direction of the vehicle A based on the signal from the position detection means 17 (step S1). In this case, the control means 15 calculates vehicle position coordinates by the GPS device 11, the speed sensor 10, and the gyro sensor 12. For example, the control means 15 can calculate the vehicle position coordinates and the traveling direction of the vehicle A by obtaining the locus of the vehicle A that changes with time using the GPS device 12. Further, the control means 15 can calculate the vehicle position coordinates and the traveling direction from the movement width of the vehicle A and the vehicle body direction based on signals from the speed sensor 10 and the gyro sensor 12.

  Next, the control means 15 sets viewpoint coordinates according to the vehicle position coordinates, and sets the display direction based on the traveling direction of the vehicle A (step S2). In this case, the viewpoint coordinates are set to a position 15 meters higher than the vehicle position coordinates, and the display direction is set to the same direction as the traveling direction of the vehicle A.

  Next, in the digital map data stored in the storage medium 13, the control means 15 performs a drawing process on the running road shape by calculating three-dimensional coordinate information selected based on the viewpoint coordinates and the display direction (step) S3). In this case, three-dimensional coordinate information within 300 meters from the viewpoint coordinates in the display direction side is calculated, and drawing processing is performed so that the display image L is displayed.

  Further, the control means 15 outputs to the display drive circuit 16 a signal that prompts the display device 2 to display the drawn road shape as a road shape image (step S4).

  By repeating the above-described processing, the traveling road shape based on the viewpoint coordinates and the three-dimensional coordinate information updated each time the vehicle A travels can be projected on the windshield W as the display image L. For example, a runway shape R as shown in FIGS. 5 and 6 can be projected onto the windshield W.

  In addition, when performing the drawing process in step S3, the control unit 15 doubles the height coordinate value of the three-dimensional coordinate information of the digital map data and converts it, for example, in the vertical direction (height The drawing processing is performed so that the (direction) scale becomes larger than the horizontal (width direction) scale. Accordingly, in the displayed display image L, the vertical coordinate interval is increased, and the change in the height difference can be displayed greatly, so that the grade of the running shape R can be emphasized.

  Further, when the control means 15 performs the drawing process in step S3, for example, as shown in FIGS. 5 and 6, the gradient of the runway shape R is a virtual contact with the change portion (peak portion) P from the down to the up. A drawing process is performed so that a horizontal plane display unit M indicating a horizontal plane is displayed together with the runway shape R. The horizontal plane display unit M is displayed from the viewpoint coordinates determined in step S2 to a predetermined distance (for example, 10 kilometers) ahead, and the end portion separated by the predetermined distance is a pseudo horizontal line display unit B Is displayed.

  Therefore, the driver can sensuously recognize the gradient of the traveling road while the vehicle A is traveling by confirming the position of the horizontal line display portion B with respect to the entire display image L. Further, when the portion corresponding to the viewpoint coordinates in the runway shape R is inclined, as shown in FIG. 6, the runway shape R is displayed together with the horizontal plane display unit M having the horizontal line display unit B displayed obliquely. Can be made. Therefore, the driver can determine the degree of inclination of the road in the viewpoint coordinates based on the inclination of the horizontal line display portion B. In addition, this horizontal plane display part M can also make it easy to compare with the runway shape R by displaying in net shape (wire frame shape).

  Further, when performing the drawing process of step S3, the control means 15 performs the drawing process so that the virtual linear display part (index part) K is displayed together with the runway shape R. The control means 15 has a grid-like shape in a predetermined area (for example, 10 meters in length and width) such that the gradient of the runway shape R is in contact with the change portion P from the down to the up, and the change portion P is located at the approximate center. The linear display part K is displayed. The linear display portion K is drawn horizontally (same height), and in this case, drawing processing is performed so as to display on the horizontal plane display portion M.

  Therefore, the control means 15 can indicate the position of the changing portion P where the runway shape R changes from down to up by displaying the linear display portion K of the predetermined area together with the runway shape R. Further, by relatively determining the size of the linear display portion K with respect to the entire display image L, it is possible to express a sense of distance from the viewpoint coordinates to the changed portion P and to express the runway width of the runway shape R. That is, the distance from the viewpoint coordinates to the change portion P and the height difference (angle) can be determined sensuously by the length of the horizontal line (line in the width direction) K1 of the linear display portion K and the interval between the horizontal lines K1. Similarly to the horizontal line display B described above, the degree of inclination of the runway at the viewpoint coordinates can be expressed according to the inclination of the linear display portion K (inclination of the horizontal line K1). Further, the sense of depth of the display image L, the contour of the runway shape R, and the runway width can be effectively represented by the inclination and interval of the vertical line (line in the depth direction) K2 of the linear display unit K.

  Moreover, the control means 15 can display the runway shape R by the display color preset according to the grade of gradient, when performing the drawing process of step S3. For example, in the runway shape R, the downward slope portion R1 is displayed in red, and the greater the slope, the darker red is displayed. The upward slope portion R2 is displayed in blue, and the darker blue is displayed as the slope is larger. In this case, the control means 15 uses, as an auxiliary line R3, a line that passes through a predetermined position (predetermined longitude / latitude) of the digital map data and does not relate to the contour of the road (the line in the width direction of the road in FIGS. 5 and 6). It is displayed. The control means 15 extracts gradient data for each road surface between the auxiliary lines R3, and draws a road shape R formed by coloring a display color corresponding to the degree of the gradient for each road surface. In this case, the control means 15 draws the running road shape L by coloring the running road surface portion having almost no gradient in white, and causes the display 2 to project and display it.

  Therefore, the driver can determine whether the runway is an uphill or a downhill, or the degree of the gradient, by visually recognizing the display color of the runway shape R and the degree of shading thereof.

  Such a vehicle head-up display device includes a display 2 that projects and displays a runway shape R based on digital map data including three-dimensional coordinate information stored in a storage medium, and a position detection that detects the current position of the vehicle A. Means 17 and control means 15 for reading the digital map data based on the current position of the vehicle A detected by the position detection means 17 and projecting and displaying the road shape R on the front side of the vehicle A on the display 2. In the vehicle head-up display device, the control unit 15 emphasizes and displays the height difference of the runway shape R projected and displayed on the display device 2.

  Therefore, the driver can grasp the runway shape displayed with the gradient emphasized by visually recognizing the display image L projected by the display device 2, so the runway gradient is determined from the surrounding scenery. Even if it is difficult to do so, it is possible to instantly recognize whether the runway is uphill or downhill. In addition, the above-described head-up display device for a vehicle can cause the driver to instantly recognize which portion has a certain gradient with respect to the running shape of the vehicle A. It is possible to easily grasp the road shape to be noted on the front side.

  In the above-described embodiment, the display image L from the display device 2 is projected onto the windshield W. However, the projection member in the present invention is not limited to this embodiment. For example, a display image from a display device may be projected onto a combiner disposed on a windshield surface of a vehicle or a dashboard of the vehicle. Further, instead of the above-described head-up display system, for example, a display unit composed of an organic EL panel or a liquid crystal panel may be adopted, and the driver may directly view the display on the display unit.

  In the above-described embodiment, an example has been described in which the indicator portion including the linear display portion B is displayed to show a change portion where the runway changes from descending to ascending. For example, it is possible to indicate a top portion that changes from ascending to descending. In this case, the position of the top portion can also be indicated by an index composed of marks such as arrows.

  Further, instead of the storage medium 13 of the above-described embodiment, for example, a server provided outside the vehicle can be applied as a storage medium, and digital map data stored in the server can be downloaded as appropriate by wireless communication.

Sectional drawing of the display means of the head-up display apparatus for vehicles which is embodiment of this invention. The schematic diagram of the head up display device for vehicles which is an embodiment same as the above. The block diagram of a head up display device for vehicles same as the above. The figure which shows the process sequence of the head-up display apparatus for vehicles same as the above. The figure which shows the display image of the head up display apparatus for vehicles same as the above. The figure which shows the display image of the head up display apparatus for vehicles same as the above.

Explanation of symbols

2 Display (display means)
13 Storage medium (map information storage means)
15 Control means 17 Position detection means M Horizontal plane display part K Linear display part (index part)

Claims (5)

Display means for displaying the road shape based on the map information consisting of the three-dimensional information stored in the map information storage means, position detection means for detecting the current position of the vehicle, and the vehicle detected by the position detection means. Control means for reading out the map information based on the current position and displaying the traveling road shape on the front side of the vehicle on the display means,
The control means emphasizes the height difference and displays the runway shape on the display means,
A vehicular display device that displays a horizontal plane display unit indicating a virtual horizontal plane in which the gradient of the runway shape displayed on the display unit is in contact with a changing portion from descending to ascending .   2. The vehicle display device according to claim 1, wherein the control unit displays on the display unit a runway shape obtained by making a scale in the height direction larger than a scale in the width direction. 3. The vehicle display device according to claim 1, wherein the control unit causes the change portion to display an indicator portion having a grid-like alignment of a predetermined region virtually provided to indicate a horizontal plane .   The vehicle display device according to claim 1, wherein the control unit displays the running road shape in a display color set according to a gradient. 2. The vehicle according to claim 1, wherein the display unit includes a head-up display that projects and displays a display image on a windshield of the vehicle or a combiner provided between the windshield and a driver. Display device.

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