JP2006040223A - Display device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for vehicles by which a driver easily grasps a road shape in front of a vehicle. <P>SOLUTION: In a head-up display device for vehicles having a display unit 2 which displays the road shape based on digital map data consisting of three-dimensional coordinate information stored in a storage medium 13, a position detection means 17 for detecting the current position of a vehicle A and a 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 displaying the road shape in front of the vehicle A on the display unit 2, the control means 15 emphasizes and displays a curve part L4 with predetermined curvature or more in the road shape to be displayed on the display unit 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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 runway shape display showing the runway shape of the front seen from the viewpoint of a vehicle driver in the above-mentioned display apparatus for vehicles is known (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. It is possible to grasp the actual running road shape from the display.
JP 11-310055 A JP 2000-211142 A

  However, in such a vehicle display device, the driver recognizes the runway shape display displayed as the virtual image, and grasps the actual runway shape from the shape. The front side of the road, such as whether the shape displayed while recognizing the road shape display updated according to the travel is a straight line or a curve, or whether it is a sharp curve that requires the brake to be operated The situation on the (traveling direction side) had to be judged, and there was room for improvement as a function to support the driver.

  Accordingly, an object of the present invention is to provide a vehicle display device that allows the driver to easily grasp the shape of the runway on the front side of the vehicle.

  The vehicle display device according to the present invention includes, as described in claim 1, display means for displaying a runway shape based on map information composed of three-dimensional information stored in the map information storage means, and a current position of the host vehicle. Position detecting means for detecting the map, and control means for reading the map information based on the current position of the host vehicle detected by the position detecting means and causing the display means to display a traveling road shape on the front side of the host vehicle; , Wherein the control means emphasizes and displays a curve portion having a predetermined curvature or more in the runway shape displayed on the display means.

  Further, as described in claim 2, in the vehicle display device according to claim 1, the control means displays the curve portion on the display means in a display color different from a display color of a normal running road. The display is blinking.

  According to a third aspect of the present invention, in the vehicular display device according to the first aspect, the control unit is configured to perform the predetermined curvature based on a signal from a vehicle speed detection unit that detects a vehicle speed of the host vehicle. The value of is variable and set.

  Further, as described in claim 4, in the vehicle display device according to claim 1, the control unit has a display color that is different from a display color of a portion corresponding to a travel lane of the host vehicle in the travel path shape. The back side portion of the travel lane is displayed on the display means.

  Further, as described in claim 5, in the vehicle display device according to claim 1, the control means has an opposite lane in a display color different from a display color of a portion corresponding to the travel lane in the runway shape. A portion corresponding to is displayed on the display means.

  Further, as described in claim 6, in the vehicle display device according to claim 1, the display means displays on a windshield of the host vehicle or a combiner provided between the windshield and the driver. It comprises a head-up display that projects and displays an image.

  The present invention relates to a display device for a vehicle that displays a running road shape by display means mounted on the vehicle, and allows a driver to easily grasp the running road shape on the front side of the vehicle.

  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.

  1 and 2, reference numeral 1 denotes a display unit, which is disposed in a dashboard of a vehicle (own 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 vehicle position (the current position of the vehicle A). The GPS device 11 includes a GPS reception antenna and an amplification circuit, and transmits a transmission radio wave that is position information from an artificial satellite received by the reception antenna. A signal amplified 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 runway shape data indicating the shape of the runway, height data indicating the height of the runway at a predetermined position, tilt data indicating the right and left slopes of the runway, and curvature data indicating the curvature of the runway. Etc.

  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. FIG.

  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 on the display direction side from the viewpoint coordinates is calculated.

  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).

  In the display image L shown in FIG. 5, for example, in the display image L shown in FIG. 5, the control unit 15 makes the portion L1 corresponding to the travel lane of the runway white and the portion L2 corresponding to the opposite lane gray. The portion L3 corresponding to the back surface of the runway can be black, and can be drawn with different display colors.

  Therefore, the vehicle head-up display device can provide a display that makes it easy for the driver to recognize the traveling surface of the vehicle A, and can provide driving assistance that allows the driver to easily grasp the road information. In addition, by making the display color of the portion L3 corresponding to the backside of the runway and the portion L1 corresponding to the runway lane of the runway different display colors, it is possible to display a three-dimensional effect, and even a complicated runway shape is easy. It becomes a head-up display device for vehicles which can perform display which can be grasped easily.

  Further, when the vehicle A travels on a track as shown in FIG. 6, for example, the control means 15 calculates or reads the curvature of the curve of the track from the digital map data in step S3, and whether or not it is equal to or greater than a predetermined curvature. If the curvature is equal to or greater than a predetermined curvature, it is determined that there is a steep curve on the runway, and the steep curve portion L4 can be rendered so that the display is highlighted in red or yellow, for example. Note that the control unit 15 can also perform drawing processing so that the sharp curve portion L4 blinks in a display color (for example, red or yellow) different from the normal display color so that more effective highlighting is achieved.

  Accordingly, since the display color of the portion L1 corresponding to the normal driving lane (in this case, white) and the display color of the sharp curve portion L4 (in this case, red or yellow) are made different, the sharp curve portion L4 Since it is displayed with emphasis, the driver can visually recognize in advance points to be careful of the vehicle speed and steering operation.

  Further, the control means 15 calculates the vehicle speed based on the signal from the speed sensor 10, and if the vehicle A is above a predetermined speed (a safe speed range set by the curvature of the curve) with respect to the sharp curve, the vehicle A follows the sharp curve L4. Driving assistance can be actively provided to the driver by performing a warning display (for example, a display of “speed down”) L5 for prompting deceleration before traveling. Therefore, the driver can instantly recognize that the vehicle A travels at an overspeed with respect to the change in the shape of the traveling path of the sharp curve portion L4 on the front side by the warning display L5. In addition, the display form of the warning display is arbitrary, for example, a mark for prompting deceleration may be displayed, or the curvature of the sharp curve portion or the safe speed with respect to this sharp curve portion is displayed numerically. It may be.

  Such a vehicle head-up display device includes a display 2 for displaying the shape of a running path based on digital map data composed of three-dimensional coordinate information stored in a storage medium 13, and a position detection means for detecting the current position of the vehicle A. 17 and a control means 15 that reads out the digital map data based on the current position of the vehicle A detected by the position detection means 17 and displays the traveling road shape on the front side of the vehicle A on the display 2. In the head-up display device, the control unit 15 emphasizes and displays the sharply curved portion L4 having a predetermined curvature or more in the running road shape displayed on the display 2.

  Accordingly, since the driver can grasp the runway shape by viewing the indicator 2, the driver can visually check the actual runway shape under the influence of weather conditions, runway curves, surrounding vehicles, buildings, and the like. Even when it is difficult to do so, it is possible to instantly recognize that the sharp curve portion L4 exists on the road ahead of the vehicle A. In addition, since the above-described vehicle head-up display device can make the driver instantly recognize which part of the vehicle A has a sharp curve and which part has a sharp curve. It is possible to easily grasp the road shape to be noted on the front side of the vehicle.

  In the embodiment of the present invention, 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. Instead, 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.

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)
10 Speed sensor (vehicle speed detection means)
13 Storage medium (map information storage means)
15 Control means 17 Position detection means L4 Steep curve portion (curve portion)

Claims (6)

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 host vehicle, and the vehicle detected by the position detection means. Control means for reading out the map information based on the current position of the vehicle and displaying on the display means the shape of the road ahead of the host vehicle,
The display device for a vehicle, wherein the control means emphasizes and displays a curve portion having a predetermined curvature or more in the running road shape displayed on the display means.   2. The vehicle display device according to claim 1, wherein the control unit causes the display unit to display or blink the curve portion in a display color different from a display color of a normal running road.   2. The vehicle display device according to claim 1, wherein the control unit variably sets the predetermined curvature value based on a signal from a vehicle speed detection unit that detects a vehicle speed of the host vehicle. .   The said control means displays the back side part of the said driving lane on the said display means with the display color different from the display color of the part corresponding to the driving lane of the said own vehicle in the said runway shape. The vehicle display device described in 1.   2. The vehicle according to claim 1, wherein the control unit causes the display unit to display a portion corresponding to the oncoming lane in a display color different from a display color of the portion corresponding to the traveling lane in the running road shape. Display device. The said display means consists of a head-up display which projects and displays a display image on the windshield of the said own vehicle or the combiner provided between a windshield and a driver | operator. Vehicle display device.

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