JP2010006267A - Display device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for a vehicle which can improve a corresponding property between an object and a visual mark while taking measures against double images. <P>SOLUTION: This display device 1 has a camera 11 for vehicle outside and vehicle outside information processing part 22, a camera 7 for a driver and a driver visual line detecting part 21, an HUD display 26 and an LCD 4, and a light source 3. The HUD display 26 and LCD 4 and the light source 3 generate virtual image display to form design by a display image generation part 24 when double image display is made due to an effect that the driver looks at a front obstacle by focusing the front obstacle, and display the virtual image display overlapped on the front obstacle or surround the front obstacle by an image display position control part 25. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention belongs to the technical field of vehicle display devices.

Conventionally, a display image in which a vehicle ahead is indicated is displayed as a virtual image using a windshield, and a display unit that performs this display has at least two display images with a predetermined interval at which binocular parallax becomes the largest. (For example, refer to Patent Document 1).
JP 2000-57491 A (page 2-8, full view)

However, conventionally, since four targets are visually recognized by one target, there is a problem that it is difficult to correspond the target and the target.
This point will be described in detail.
When a driver who is looking far away sees a virtual image display on the display, the problem of a double image that appears double appears. Conventionally, two or more display images are separated from each other by a predetermined distance or a horizontally long display of a predetermined length with respect to one object, for example, a preceding vehicle. Since four visual targets are visually recognized with respect to the object, there arises a problem that it is difficult to correspond the symmetrical object and the visual target.

  The present invention has been made paying attention to the above-described problems, and the object of the present invention is to provide a vehicle display device that can improve the correspondence between an object and a target while taking measures against double images. Is to provide.

  In order to achieve the above object, in the present invention, the obstacle detection means for detecting a front obstacle of the own vehicle, the line-of-sight detection means for detecting the driver's line-of-sight position, and the obstacle detected in the forward visibility direction of the driver Display means for displaying a virtual image that causes the driver to recognize the display device, wherein the display means is a unique display when the driver displays a double image by focusing on a front obstacle. Is displayed so as to overlap or surround the front obstacle.

  Therefore, in the present invention, it is possible to improve the correspondence between the object and the visual target while taking measures against double images.

  Hereinafter, the embodiment for realizing the vehicle display device according to the present invention corresponds to the first embodiment corresponding to the invention according to claims 1, 2, 3, 4 and the invention according to claims 1, 2, 5. A description will be given based on the second embodiment.

First, the configuration will be described.
FIG. 1 is a schematic explanatory diagram of a vehicle display device according to a first embodiment.
The vehicle display device 1 according to the first embodiment includes a controller 2, a light source 3, an LCD 4, and a mirror 5, and cooperates with a driver camera 7 and a vehicle camera 11.
The controller 2 includes a driver monitoring system that detects the driver's eye position and line of sight using the driver camera 7, an obstacle detection system in front of the vehicle by the vehicle camera 11, the display content of the LCD 4, and the light source 3, navigation, Calculation and control of input from a vehicle speed sensor or the like.

The light source 3 projects light from behind so that the display on the LCD 4 has brightness.
The LCD 4 performs image display of display contents set by the controller 2.
The mirror 5 reflects the display light from the LCD 4 toward a predetermined position of the front windshield 6. The front windshield 6 may be provided with a semi-reflective member or the like so as to have a predetermined reflectance and transmittance.
In addition, the instrument panel 10 above the mirror 5 is configured to open and allow display light to pass therethrough.

The driver camera 7 is installed on the upper part of the steering column 8 and images the face of the driver through the steering wheel 9.
The vehicle exterior camera 11 is installed, for example, at the front end of the vehicle and images the front of the vehicle. This vehicle exterior camera 11 may be a stereo camera.
Moreover, the controller 2 acquires information from a navigation or a vehicle speed sensor directly or via in-vehicle communication. This is input information 13.
In addition, the display apparatus 1 for vehicles of Example 1 shall display on the comparatively wide range of the front windshield 6, and shall display a virtual image superimposed on the driver's front view.

FIG. 2 is a diagram showing a control block structure of the controller 2 of the vehicle display device.
The controller 2 includes a driver line-of-sight detection unit 21, an out-of-vehicle information processing unit 22, a vehicle information processing unit 23, a display image generation unit 24, an image display position control unit 25, and a HUD display unit 26.
As a driver monitoring system, the driver gaze detection unit 21 performs image processing such as detecting feature points from an image obtained by capturing the driver's face, and detects the position of the eyeball.

As the obstacle detection system, the outside information processing unit 22 processes an image captured by the outside camera 11 to detect an obstacle such as a pedestrian or a preceding vehicle, and outputs the detected information to the display image generation unit 24 as outside information. To do.
The vehicle information processing unit 23 inputs and processes input information 13 from a navigation, a vehicle speed sensor, and the like, and outputs the processing result as vehicle information to the display image generation unit 24.

The display image generation unit 24 generates a display image based on the vehicle exterior information and the vehicle information, and outputs the display image to the image display position control unit 25.
The image display position control unit 25 calculates an image display position from the eyeball position of the driver and outputs the calculated image display position to the HUD display unit 26.
The HUD display unit 26 performs processing for displaying the commanded display contents at the commanded display position of the LCD 4.

FIG. 3 is an explanatory diagram illustrating a display image according to the first embodiment.
In the first embodiment, the dot pattern 201 shown in FIG. 3 is displayed so as to be superimposed on the detected obstacle.
The dot pattern 201 is obtained by arranging a large number of small circular dots 201a within a predetermined range. Note that this predetermined range is changed according to the size of the obstacle visible to the driver. In that case, the number of dots 201a may be increased or decreased, and the size of the dots 201a may be increased or decreased.

The operation will be described.
[Action to improve correspondence between objects and indicators]
FIG. 4 is an explanatory diagram illustrating a display example by the vehicle display device according to the first embodiment.
In the vehicular display device according to the first embodiment, a front vehicle, a pedestrian, or the like detected by the driver camera 7 is used as an obstacle, and highlighting is performed so that the driver can recognize the virtual image.
For example, when the front vehicle is detected as an obstacle (target object) by the vehicle external camera 11, the display image generation unit 24 obtains this as vehicle outside information and takes into account the vehicle speed of the host vehicle obtained as vehicle information, Display to make the driver recognize the vehicle ahead.
When this display is displayed as a double image, the size is displayed in a rectangular range covering the vehicle ahead. The dot patterns 202a and 202b are displayed within the rectangular range.

  The dot pattern 201 (reference numerals 202a and 202b as a double image display in FIG. 4A) is displayed twice when the driver's line of sight is focused on the preceding vehicle, whereby the preceding vehicle The display is superimposed on the area surrounding (see reference numeral 301 in FIG. 4A). At this time, the dot pattern 201 has a clear dot arrangement for the sake of explanation, but in reality, it is a slightly finer one design that does not give a sense of incongruity to being displayed twice. (See FIG. 4 (a)).

  Since this dot pattern 201 is a display having brightness by the light source 3, this makes it possible to notice the emphasized display, to ensure that the driver recognizes the vehicle ahead, and to support good driving.

Here, when the driver focuses the line of sight on the dot pattern 201, the vehicle ahead appears to be double (see reference numerals 301a and 301b in FIG. 4B). Then, a dot pattern 201 that is not a double image display can be seen.
It can be said that the dot pattern 201 differs only in size and has the same design as the dot patterns 202a and 202b displayed as double images. Only the number of dots increases to the left and right. Therefore, the driver does not feel uncomfortable about whether or not to display a double image.

  As described above, the vehicle display device according to the first embodiment improves the correspondence between the object (obstacle) and the index (superimposition display) that are more superimposed and emphasized while sufficiently taking measures against the double image display. Can do.

Furthermore, it demonstrates.
The HUD display shows a speed display, a route guidance icon, an approach warning, a reflective member such as a front windshield or a combiner, slightly downward with respect to the driver center line of sight, or slightly lower left or lower right with respect to the driver center. The advantage is that warnings are displayed and the movement of the line of sight is less than that of other displays. In addition, since the focus adjustment speed is further increased, it is desirable to form a distant image on the display. As a result, in the normal driving state, the focal distance difference when looking at the display, that is, the difference between the object and the display image formation position is small with respect to the object (obstacle) or landscape that the driver is looking at. This leads to better driving conditions.

  By displaying in the area that the driver is viewing while traveling, that is, the direction and range that is being watched carefully, the driver can view or judge the display content without moving the line of sight more. This is preferable because information can be obtained while maintaining the driver's concentration in the forward field of view.

  In this case, when the distance from the driver to the object (obstacle), for example, 20 m is different from the distance from the driver to the distant image display (virtual image display), for example, 2 m, when the object is viewed and focused. , The far image formation display (virtual image) looks double. On the other hand, when the display is viewed and focused, the object may appear double. This is because the images formed on the retinas of both eyes are different (retinal image difference) because the eyeballs are about 6.5 cm apart in the horizontal direction.

  On the other hand, in Japanese Patent Laid-Open No. 2000-57491, countermeasures such as two downward display of the object are taken, but it is difficult to deal with the object such as 4 indices for one object. It has become. In addition, when displaying on a plurality of front obstacles (objects), this becomes remarkable.

In the first embodiment, on the premise that a double image display is achieved, the design contents are hardly changed even when the design is configured and the display is focused. That is, only the size of the display range and the number of dots are different.
This is advantageous in that the display of the object is very emphasized by displaying the dot pattern 201 superimposed on the obstacle (object) while taking measures against double image display.

In order to clarify the operation of the first embodiment, further explanation will be added below.
In order to emphasize the target, it is conceivable to display in a superimposed manner.
FIG. 5 is an explanatory diagram showing an example of superimposed display.
When the object is emphasized by the superimposed display, as shown in FIG. 5, for example, if the vehicle is a front vehicle, the driver displays a design display image 401 in which the shape of the vehicle is provided in a rectangular frame from the driver. It is conceivable to display the image superimposed on the line of sight (see FIG. 5C).

However, due to the problem of the double image described above, the display looks double like the display images 402a and 402b of FIG. 5A, or the front vehicles 301a and 301b are double as shown in FIG. 5B. It will give you a sense of incongruity.
In the first embodiment, such a double image problem is solved.

In order to solve the problem of the double image, it is conceivable to display a bar-like display extending in the horizontal direction below the object (another example of JP-A-2000-57491).
FIG. 6 is an explanatory diagram showing an example in which a bar-like display is performed below the object.
In this example, the display images 502a and 502b in the case of a double image and the display image 501 in the case of being in focus only change the length in the horizontal direction. (See FIGS. 6A and 6B).
However, the correspondence indicating the object is weak. In particular, it is weaker than the superimposed display as shown in FIG.

In the obstacle detection by the vehicle external camera 11, it is desired that the front obstacle is highlighted and displayed so that the driver can be surely recognized. This is especially true when urgency and priority are high.
In the first embodiment, the dot pattern 201 is advantageous in that the front obstacle (object) is emphasized by the superimposed display, and the driver is surely recognized.

Further, in the case where a bar-like display is performed below the front obstacle (object) shown in FIG. 6, the correspondence is remarkably lost when there are a plurality of front obstacles (objects).
In Example 1, it becomes very strong correspondence by carrying out superimposition display.
That is, in the first embodiment, the display image generation unit 24 increases or decreases the size of the display range of the dot pattern 201 in accordance with the size of the front obstacle (target object). There will be a front obstacle (object) at the position 201 itself, and strong correspondence will be obtained.

In addition, in the case of displaying a bar-like display below the front obstacle (object) shown in FIG. 6, even if the length in the horizontal direction is changed according to the size of the front obstacle (object), it is double. It changes due to the action of the image, and it is difficult to give the driver a sense of distance to the front obstacle (object) by display.
On the other hand, in the first embodiment, the dot pattern 201 is displayed in the rectangular range, and the distance to the front obstacle (object) is sensed by the size in the height direction that is not changed by the action of the double image. To the driver. This is very advantageous in driving assistance for the driver.

Next, the effect will be described.
In the vehicle display device according to the first embodiment, the effects listed below can be obtained.

  (1) The vehicle exterior camera 11 and the vehicle exterior information processing unit 22 for detecting a front obstacle of the host vehicle, the driver camera 7 and the driver view detection unit 21 for detecting the driver's line of sight position, and the driver's forward view direction In the vehicle display device 1 having the HUD display unit 26 and the LCD 4 and the light source 3 for performing virtual image display for causing the driver to recognize the detected obstacle, the HUD display unit 26 and the LCD 4 and the light source 3 are arranged so that the driver focuses on the front obstacle. A virtual image display that forms a unique design when a double image display is obtained by viewing together is generated by the display image generation unit 24, and is displayed so as to overlap or surround the front obstacle by the image display position control unit 25. Therefore, it is possible to improve the correspondence between the object and the target while taking measures against the double image.

  (2) In the above (1), the HUD display unit 26, the LCD 4, and the light source 3 display the virtual image display on which the unique craft is formed, even when the driver focuses on the virtual image display. In order to reduce the sense of incongruity due to the change of focus, and to prevent double images, the design is displayed even if the driver's line of sight is in front of the obstacle or in the virtual image display. Can be improved.

  (3) In the above (2), the HUD display unit 26, the LCD 4, and the light source 3 generate a display in which the design in the case of virtual image display and the design of the double image display are substantially the same, and display the display. Therefore, even if the focus of the driver's line of sight is on a front obstacle or on a virtual image display, the discomfort caused by changing the focus is reduced, and the countermeasure for double images is further improved. Can do.

  (4) In the above (1) to (3), the HUD display unit 26, the LCD 4, and the light source 3 are overlapped with the front obstacle, and are displayed within a range that surrounds the obstacle when displaying a double image. Since the display image generation unit 24 generates and displays the dot pattern 201 in which a large number of dots are displayed, the correspondence between the obstacle and the virtual image display is improved by the display superimposed on the obstacle, and according to the height direction of the dot pattern 201, The distance information to the obstacle can be transmitted, and when the focus of the driver's line of sight is on the front obstacle and in the virtual image display, the dot pattern 201 should have almost the same design that differs only in the number of dots on the left and right. Thus, it is possible to sufficiently take measures against double images.

The second embodiment is an example in which the shape of the alphabet “I” is arranged as a virtual image display so as to surround an obstacle (object) from the left and right.
The configuration will be described.
FIG. 7 is an explanatory diagram illustrating a display image according to the second embodiment.
In the second embodiment, the display image generating unit 24 arranges a vertical bar on the left and right sides of the detected obstacle and a virtual image in which I-shaped “I” (I mark) provided with horizontal bars on the upper and lower ends of the vertical bar. A display 203 is generated (see FIG. 7). That is, the vertical bar of “I” (I mark) indicates the height according to the distance of the obstacle from the own vehicle, and the horizontal bars at the upper and lower ends emphasize this height. In addition, the U-shaped portions of “I” (I mark, hereinafter omitted) arranged on the left and right emphasize the range where the obstacle exists.
Since other configurations are the same as those of the first embodiment, description thereof is omitted.

The operation will be described.
[Action to improve correspondence between objects and indicators]
FIG. 8 is an explanatory diagram illustrating a display example by the vehicle display device according to the second embodiment.
In the vehicular display device according to the second embodiment, for example, when the front vehicle is detected as an obstacle (target object) by the vehicle exterior camera 11, a display for causing the driver to recognize the front vehicle is performed.
When this display is displayed as a double image, as shown in FIG. 8A, display images 204a and 204b in which “I” is arranged so as to surround the preceding vehicle from the left and right are displayed.
In other words, when the driver's line of sight is focused on the preceding vehicle, the display image 204a is superimposed on the range surrounding the preceding vehicle (see reference numeral 301 in FIG. 8A) by being displayed twice. 204b is displayed.

In the display of “I” by the double image, it is further emphasized that the vertical bar of “I” indicates the height of the obstacle and the horizontal bars at the upper and lower ends indicate the height. Therefore, a sense of distance to the obstacle can be transmitted to the driver. In addition, since the U-shaped portions of “I” displayed on the left and right sides of the obstacle in a double image display are displayed so as to surround each other, the obstacle (object) and the virtual image display are strong. Get responsive.
Then, when the driver focuses the line of sight on the virtual image display “I”, the vehicle ahead will appear double, and the virtual image display “I” that is not double image display will be visible.

In this case, as shown by reference numerals 301a and 301b in FIG. 8B, a single virtual image display “I” (reference numeral 203) is displayed so as to separate the two vehicles between the front vehicles (obstacles) that appear double. Is done.
In that case, the height of the obstacle is transmitted to the driver while the vertical bar of the virtual image display “I” (reference numeral 203) is displayed so as to partition the obstacles that appear double. The horizontal bars at the upper and lower ends of the virtual image display “I” emphasize this height.
Also, two U-shaped portions facing left and right of the virtual image display “I” (reference numeral 203) are displayed so as to indicate the range of the vehicle in front that can be seen twice. As described above, even if the virtual image display “I” is focused, it is displayed as one design having a meaning, so that the driver does not feel uncomfortable whether or not the double image display is performed.
Furthermore, since the two U-shaped portions facing the left and right of the virtual image display “I” (reference numeral 203) indicate the range of the preceding vehicle that can be seen twice, the front vehicle (obstacle) and the virtual image display “I” (reference numeral 203). ).

  As described above, in the vehicle display device according to the second embodiment, the countermeasure between the object (obstacle) and the index (superimposition display) that are more emphasized by being superimposed so as to be surrounded is sufficiently performed while sufficiently taking measures against the double image display. Can be improved.

Next, the effect will be described.
In the vehicle display device according to the second embodiment, in addition to the effects (1) and (2) of the first embodiment, the following effects can be obtained.

(5) In the above (2), the HUD display unit 26, the LCD 4, and the light source 3 are overlapped with the front obstacle so that the vertical obstacle and the vertical bar are enclosed so as to surround the front obstacle from the left and right when displaying a double image. Since the I-shaped display image 203 formed by the upper and lower horizontal bars is displayed, it is displayed as one design that has meaning even when the virtual image display “I” is focused. In the double image display mode, it is possible to perform a display with strong correspondence to specify the obstacle range.
In addition, even if there are a plurality of obstacles, the indication indicating the obstacle range can be displayed easily because the size of the obstacle and the distance from the own vehicle can be known with good correspondence.

  As mentioned above, although the display apparatus for vehicles of the present invention has been described based on the first and second embodiments, the specific configuration is not limited to these embodiments, and each claim of the claims Design changes and additions are permitted without departing from the spirit of the invention.

The virtual image display according to the first embodiment is an advantageous display that is surely recognized by the driver, and may be used for a warning display.
The dots of the dot pattern may be arranged in an aligned manner or randomly arranged. The size and number of dots are preferably set so that the difference between the double image display and the in-focus display is difficult to notice and sufficient highlighting can be performed.

1 is a schematic explanatory diagram of a vehicle display device according to Embodiment 1. It is a figure which shows the control block structure of the controller 2 of the display apparatus for vehicles. 6 is an explanatory diagram illustrating a display image in Embodiment 1. FIG. It is explanatory drawing which shows the example of a display by the display apparatus for vehicles of Example 1. FIG. It is explanatory drawing which shows the example of a superimposed display. It is explanatory drawing which shows the example which performs a rod-shaped display under the target object. FIG. 10 is an explanatory diagram illustrating a display image in Example 2. FIG. 10 is an explanatory diagram illustrating a display example by the vehicle display device according to the second embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle display apparatus 2 Controller 21 Driver gaze detection part 22 Outside vehicle information processing part 23 Vehicle information processing part 24 Display image generation part 25 Image display position control part 26 HUD display part 3 Light source 4 LCD
5 Mirror 6 Front windshield 7 Driver camera 8 Steering column 9 Steering wheel 10 Instrument panel 11 External camera 12 Seat 13 Input information 102 Virtual image display 201 Dot pattern 201a Dots 202a, 202b Dot pattern 203 (looks double image) Display image 204a, 204b ("I") display image 301 ("I") appears in front of vehicle 301a, 301b (looks in focus) Front vehicle h driver 401 (vehicle) Display image 402a, 402b (looks like a double image) Display image 501 (stick-like shape extending horizontally) Display images 502a, 502b (looks like a double image)

Claims (5)

Obstacle detection means for detecting an obstacle ahead of the vehicle;
Gaze detection means for detecting the gaze position of the driver;
Display means for performing virtual image display for causing the driver to recognize the detected obstacle in the forward visual field direction of the driver;
In a vehicle display device having
The display means includes
When the driver becomes a double image display by focusing on the front obstacle, a virtual image display forming a unique craft is displayed on the front obstacle so as to overlap or surround the front obstacle.
A display device for a vehicle. The vehicle display device according to claim 1,
The display means includes
Even when the driver looks at the virtual image display in focus, a unique takumi is formed,
A display device for a vehicle. The vehicle display device according to claim 2,
The display means includes
The design in the case of the virtual image display and the design in which the design of the double image display is substantially the same,
A display device for a vehicle. In the vehicle display device according to any one of claims 1 to 3,
The display means includes
Overlaid on the front obstacle, during the double image display, a dot pattern display in which a large number of points are arranged within a range that surrounds the front obstacle is performed.
A vehicle display device characterized by that. The vehicle display device according to claim 2,
The display means includes
Overlaid on the front obstacle, when displaying the double image, an I-shaped display formed by a vertical bar and horizontal bars at the upper and lower ends of the vertical bar so as to surround the front obstacle from the left and right is performed.
A vehicle display device characterized by that.

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