JP2006036166A - Vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle display device capable of easily visually recognizing a displayed image projected onto a combining means for a driver. <P>SOLUTION: This is a vehicle head-up display device having a display unit 2 for projecting a displaying image L onto a front wind shield W installed at a vehicle A, wherein the displaying image L projected onto the front wind shield W is overlapped on a surrounding scene to display it. This display device has an image taking means C for taking a photograph of the surrounding scene and a control means 15 for setting a high contrast color as a display color of the displaying image L in contrast to color of either portion corresponding to a background of the displaying image L or its near portion in the image photographing information got by the image taking means C and for projecting image through 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 vehicle head-up display device that projects and displays various information as a display image has been proposed as a vehicle display device. Such a head-up display device for a vehicle projects a display light emitted from a liquid crystal display element provided with a backlight as a display image onto a vehicle front glass or a semi-transmission plate called a combiner provided exclusively for displaying a virtual image. To do. According to the vehicle head-up display device described above, it becomes possible to display various information such as vehicle information such as vehicle speed and engine speed and navigation information as the virtual image, and the driver can display the virtual image outside the vehicle. It can be seen superimposed on the scenery (hereinafter referred to as the outside scene).

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

  In such a vehicular display device, the driver recognizes the runway shape display displayed as a virtual image superimposed on the scenery of the outside world, and grasps the actual runway shape from the shape. However, since the scenery of the outside world changes variously depending on the place where the vehicle travels, the weather, and the day and night, the scenery of the outside world with the same color as the display color of the runway shape display displayed as a virtual image is the background color. Therefore, it is difficult for the driver to visually recognize the road shape display.

  Therefore, an object of the present invention is to provide a vehicle display device that allows a driver to easily visually recognize a display image projected on the combiner.

  The vehicle display device according to the present invention includes a display unit that projects a display image on a combiner mounted on the vehicle, and overlaps the display image projected on the combiner with an external scene. A display device for a vehicle that displays together, an imaging unit that images the scene of the outside world, and a contrast with respect to a color of a portion corresponding to a background of the display image or a color in the vicinity thereof in imaging information by the imaging unit Control means for setting a high color as a display color of the display image and projecting it by the display means.

  According to a second aspect of the present invention, in the vehicle display device according to the first aspect of the present invention, position detection means for detecting the current position of the vehicle is provided, and the control means is detected by the position detection means. The map information consisting of three-dimensional information stored in the map information storage means is read out based on the current position of the vehicle and the running road shape on the front side of the vehicle is projected as the display image. is there.

  Further, as described in claim 3, in the vehicle display device according to claim 1, the control unit applies a complementary color to a color of a portion corresponding to a background of the display image or a portion in the vicinity thereof. The display color is set as the display color of the display image.

  According to a fourth aspect of the present invention, in the display device for a vehicle according to the first aspect, the display means displays the display image projected on the combiner in a manner superimposed on a traveling path at a lower front portion of the vehicle. The control means sets a color having a high contrast with respect to the color of the runway out of the imaging information obtained by the imaging means as the display color of the display image, and causes the display means to project the color. To do.

  The present invention relates to a vehicular display device that includes display means for projecting a display image on a combiner mounted on a vehicle, and displays the display image projected on the combiner with an external scenery superimposed on the display. It is an object of the present invention to provide a vehicular display device that allows a person to easily visually recognize a display image projected on a combiner.

  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 driver's viewpoint D by the windshield (combiner) W 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. In addition, the vehicle A is equipped with an image pickup means C for picking up an outside scene (outside the vehicle) through the windshield W.

  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, and is provided so as to be adjustable to an angle at which the display image L is easily visible from the driver. 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 imaging unit C, 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 signal from the gyro sensor 12 is used for calculating the vehicle position together with the speed signal of the speed sensor 10 when the GPS device 11 cannot receive the transmission radio wave from the artificial satellite.

  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 image pickup means C can be applied to a camera having an image pickup device such as a CCD or CMOS, is provided so as to be able to pick up the front side of the vehicle A, and outputs an image for every predetermined time to the control means 15 as image pickup information. is there. In this case, the imaging means C is provided in the vehicle A between the windshield W and the driver, and the road surface (running path) illuminated by a light source such as a headlamp mounted on the vehicle A is passed through the windshield W. It is installed in such an orientation that it can be imaged.

  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. For connecting the speed sensor 10, the GPS device 11, the gyro sensor 12, the storage medium 13, the operation means 14, the imaging means C, and the display drive circuit 16 described later. And an output interface circuit. 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 projected and displayed on the display 2 via the display drive circuit 16 based on the digital map data stored in the storage medium 13. In addition, the imaging means C can obtain an external scene (a scene in front of the vehicle A) as imaging information.

  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. FIG. 5 shows an example of a display screen that is projected and displayed on the windshield surface by the display unit 1 with the traveling road shape on the front side of the vehicle A as the display image L.

  The control means 15 inputs the signal from the position detection means 17 and the imaging information from the imaging means C (step S1). At this time, the control unit 15 includes, in the image information from the image pickup unit C, an image of an external scene portion (background portion B of the display image L) on the extension line of the virtual image V seen from the viewpoint D of the driver, or a portion in the vicinity thereof Extract and read the image. In this case, the control means 15 extracts and reads an image of the road surface of the running road that is the background portion of the display image L.

  The control unit 15 calculates the vehicle position coordinates and the traveling direction of the vehicle A based on the signal from the position detection unit 17 input in step S1 (step S2). 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 a viewpoint coordinate according to the vehicle position coordinate, and sets a display direction based on the traveling direction of the vehicle A (step S3). 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) S4). In this case, three-dimensional coordinate information within 300 meters on the display direction side from the viewpoint coordinates is calculated. Further, the control unit 15 performs a drawing process on the image extracted from the imaging information in step S1 by setting a color with a high contrast as the display color of the runway shape. For example, when the road surface of the road that is the background portion B of the display image L is black, the control unit 15 performs a drawing process on a white road shape. In this case, the control means 15 sets the complementary color of the color (average color) of the image extracted in step S1 as the display color of the runway shape so as to obtain a display image L with high contrast.

  Further, the control means 15 outputs a signal for prompting the display device 2 to display the drawn road shape as a road shape image on the display 2 (step S5).

  By repeating the above-described processing, it is possible to project a display image L with high contrast on the windshield W with respect to the outside scene updated every time the vehicle A travels.

  Such a vehicle head-up display device includes a display 2 that projects a display image L on a windshield W mounted on a vehicle A, and displays the display image L projected on the windshield W so as to be superimposed on an external scene. A vehicle head-up display device, wherein the image pickup means C picks up the scene of the outside world, and the contrast between the image information obtained by the image pickup means C and the color of the portion corresponding to the background of the display image L or the vicinity thereof. Control means 15 for setting a high color as the display color of the display image L and projecting it by the display 2. Therefore, even when the scenery of the outside world serving as the background portion B changes, the display image L can be projected while setting an optimal display color according to this, so that the driver can easily display the display image L. The vehicle head-up display device can be visually recognized.

  Further, in the above-described vehicle head-up display device, the indicator 2 is provided so that the display image L projected on the windshield W is displayed so as to overlap with the traveling path in the lower front part of the vehicle A, and the control means 15 Then, of the imaging information obtained by the imaging means C, a color having a high contrast with the color of the runway is set as the display color of the display image L and is projected by the display 2. Therefore, even when the vehicle A travels, a background with a small change in color can be used as the background, and the display color of the display image L set by the background color is also less changed. The vehicle head-up display device can easily display the display image L.

  In the embodiment of the present invention, the display image L from the display device 2 is projected onto the windshield W also used as a combiner. However, the projection member in the present invention is the same as that of the present embodiment. For example, the display image from the display unit may be projected onto a combiner provided exclusively on the 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.

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 A Vehicle C Imaging means W Windshield (combiner)

Claims (4)

A display device for a vehicle, comprising display means for projecting a display image on a combiner mounted on a vehicle, wherein the display image projected on the combiner is displayed superimposed on an external scene,
An imaging unit that captures the scenery of the outside world, and a color having a high contrast with respect to the color corresponding to the background of the display image or the vicinity thereof in the imaging information obtained by the imaging unit is set as the display color of the display image And a control means for projecting by the display means.   Position detection means for detecting the current position of the vehicle is provided, and the control means comprises three-dimensional information stored in map information storage means based on the current position of the vehicle detected by the position detection means. The vehicle display device according to claim 1, wherein map information is read and a traveling road shape on the front side of the vehicle is projected as the display image.   2. The vehicle according to claim 1, wherein the control unit sets a complementary color as a display color of the display image with respect to a color corresponding to a background of the display image or a color in the vicinity thereof. Display device. The display means is provided so that the display image projected on the combiner is displayed so as to be superimposed on a road at the lower front of the vehicle, and the control means is a color of the road in the imaging information by the imaging means. The vehicle display device according to claim 1, wherein a color having a high contrast is set as a display color of the display image and is projected by the display unit.

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