JP2015160445A - Display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve recognizability of a display image.SOLUTION: A head-up display 1 includes a car speed sensor 12 for detecting car speed, and a control part 15b which shifts display position of a display image toward a center side of an effective field of sight of a driver as car speed detected with the car speed sensor 12 increases.

Description

  The present invention relates to a display device for a vehicle that displays a display image, which is a virtual image, superimposed on a real scene by projecting an image onto a projection member in front of a driver.

  2. Description of the Related Art A vehicular display device that displays a display image that is a virtual image superimposed on a real scene by projecting an image onto a projection member in front of the driver is known as a related art.

  In the vehicular display device disclosed in Patent Literature 1, a night vision image in which an obstacle ahead of the vehicle is highlighted is superimposed on the actual scene. And when a road sign is detected, the brightness | luminance of the night vision image which detected the road sign is made small. Thereby, it is possible to improve the recognizability of the road sign despite the fact that the night vision image highlighting the obstacle ahead of the vehicle is superimposed on the actual scene.

JP 2007-288657 A

  By the way, the driver's effective visual field generally becomes narrower as the vehicle speed increases. Therefore, when the display position of a display image is fixed regardless of the vehicle speed in the vehicle display device, the recognizability of the display image may decrease as the vehicle speed increases.

  The present invention has been made in view of the above points, and a problem of the present invention is to improve the recognizability of a display image.

  In order to solve the above-described problem, the present invention moves the display position of the display image toward the center of the driver's effective visual field as the vehicle speed increases, or changes the display position of the display image to at least a part of the display image. Is moved to fall within the range of the driver's effective visual field.

  Specifically, the present invention is directed to a vehicular display device that displays a display image, which is a virtual image, superimposed on a real scene by projecting an image onto a projection member in front of the driver. Measures were taken.

  That is, the first invention is a vehicle speed detection means for detecting a vehicle speed, and a control for moving the display position of the display image toward the center of the effective visual field of the driver as the vehicle speed detected by the vehicle speed detection means increases. Means.

  According to this, as the vehicle speed increases, that is, as the driver's effective visual field becomes narrower, the display position of the display image is closer to the center of the driver's effective visual field whose position does not change depending on the vehicle speed. Move. For this reason, the recognizability of the display image can be improved.

  According to a second aspect of the present invention, there is provided a vehicle speed detecting means for detecting a vehicle speed, a setting means for setting a range of the effective visual field of the driver based on the vehicle speed detected by the vehicle speed detecting means, and a display position of the display image. And a control means for moving the display image so that at least a part of the display image falls within the range of the effective visual field of the driver set by the setting means.

  According to this, the control means moves the display position of the display image so that at least a part of the display image falls within the range of the effective visual field of the driver set based on the vehicle speed. The recognizability can be improved.

  According to a third aspect of the present invention, in the first or second aspect of the invention, the control means is configured to display the display position of the display image in the vehicle longitudinal direction as the vehicle speed detected by the vehicle speed detection means increases. It is configured to move from the upper side to the upper side of the panel.

  According to this, since the control means moves the display position of the display image from directly above the instrument panel in the vehicle longitudinal direction as the vehicle speed increases, the recognizability of the display image is improved. It can be realized reliably.

  According to a fourth invention, in any one of the first to third inventions, the control means is configured to display the display image on a portion other than a central portion of the driver's effective visual field. It is characterized by this.

  According to this, since the control means displays the display image in a portion other than the central portion of the driver's effective visual field, the driver's forward view is compared with the case where the display is displayed in the central portion of the driver's effective visual field. Can be secured.

  In a fifth aspect based on any one of the first to fourth aspects, the control means increases the distance from the driver to the virtual image as the vehicle speed detected by the vehicle speed detection means increases. It is comprised so that it may be comprised.

  By the way, the driver's forward gazing point generally becomes farther as the vehicle speed increases.

  Here, according to the present invention, as the vehicle speed increases, the control means increases the distance from the driver to the virtual image, so that the driver recognizes the display image that is a virtual image without greatly moving the line of sight. Can do.

  Further, since the distance from the driver to the virtual image is increased, the display image is displayed in a large size. For this reason, the recognizability of the display image can be further improved during high speed traveling.

  In a sixth aspect based on any one of the first to fifth aspects, the control means displays a plurality of types of the display image when the vehicle speed detected by the vehicle speed detection means is low speed traveling below a predetermined speed. On the other hand, when the vehicle speed detected by the vehicle speed detection means is higher than the predetermined speed, one of the plurality of display images is selected and displayed. It is.

  According to this, since the control means displays a plurality of types of display images during low-speed traveling, and selects and displays one of the plurality of types of display images during high-speed traveling, for example, the vehicle It is possible to select and display an optimal display image corresponding to the driving environment and a display image having a high priority in terms of safe driving of the vehicle.

  According to a seventh invention, in any one of the first to sixth inventions, the control means is configured to display a display position of the display image when the vehicle speed detected by the vehicle speed detection means is higher than a predetermined speed. The display image is configured to be moved so as to be superimposed on the road that constitutes the actual scene.

  According to this, the control means moves the display position of the display image so that the display image is superimposed and displayed on the road constituting the actual scene when traveling at high speed. Compared with the case where the image is superimposed and displayed on the roadside where the screen is installed, the flickering of the display image can be suppressed, and the recognizability of the display image can be further improved.

  According to the present invention, the higher the vehicle speed, that is, the narrower the driver's effective visual field, the more the display position of the display image is moved to the center side of the driver's effective visual field whose position does not change depending on the vehicle speed. The recognizability of the display image can be improved.

  According to another invention, the display position of the display image is moved so that at least a part of the display image falls within the range of the effective visual field of the driver set based on the vehicle speed. The recognizability can be improved.

It is a block diagram which shows the display apparatus for vehicles which concerns on embodiment of this invention. It is the schematic which looked at a mode that a display picture concerning Embodiment 1 is superimposed and displayed on a real scene from the vehicles back side. FIG. 3 is a view corresponding to FIG. 2 illustrating a state in which a display image according to Embodiment 2 is displayed. FIG. 9 is a view corresponding to FIG. 2 and illustrating a state in which a display image according to a modification of the second embodiment is displayed. FIG. 9 is a view corresponding to FIG. 2 and showing a state in which a display image according to Embodiment 3 is displayed. FIG. 9 is a view corresponding to FIG. 2 and illustrating a state in which a display image according to Embodiment 4 is displayed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is not intended to limit the invention, its application, or its use.

(Embodiment 1)
The vehicle display device 1 according to Embodiment 1 of the present invention projects a display image, which is a virtual image, by projecting an image onto a front window glass 3 (projection member) provided in front of the driver 2. 3 is an in-vehicle head-up display (hereinafter simply referred to as a head-up display) that is superimposed on the actual scene in front of 3 (see FIG. 2). In the present embodiment, the vehicle v is a left-hand drive vehicle.

  As shown in FIG. 1, the head-up display 1 includes a car navigation system 10 (NAVI in FIG. 1), a front camera 11, a vehicle speed sensor 12 (vehicle speed detection means), a face camera 13, and a projection device 14. And a control device 15.

  The car navigation system 10 detects current position information, map information, and the like of the host vehicle v (see FIG. 2). The front camera 11 is provided on the front window glass 3, for example. The front camera 11 detects the object information ahead of the host vehicle v, the position information of the object, etc. by imaging the front of the host vehicle v. The vehicle speed sensor 12 detects vehicle speed information of the host vehicle v. The face camera 13 is provided in front of the driver 2. The face camera 13 detects the position information of the eyes of the driver 2 by imaging the face of the driver 2. The car navigation system 10, the front camera 11, the vehicle speed sensor 12, and the face camera 13 are electrically connected to the control device 15.

  The projection device 14 is provided below the front window glass 3. The projection device 14 displays a display image by projecting an image on the front window glass 3. This projection position is changed based on, for example, the position information of the eyes of the driver 2 from the face camera 13. The projection device 14 is electrically connected to the control device 15. Although a detailed description of the projection device 14 is omitted, the configuration thereof is conventionally known, for example.

  The control device 15 controls display of a display image by the projection device 14 based on detection information from each of the detection devices 10 to 13. The control device 15 includes a setting unit 15a (setting unit) and a control unit 15b (control unit).

  The setting unit 15 a sets the range of the effective visual field of the driver 2 based on the vehicle speed information from the vehicle speed sensor 12.

  Hereinafter, an example of this setting will be described in detail. First, an average effective field of view for each vehicle speed is obtained by conducting a predetermined experiment on the relationship between the effective field of view and the vehicle speed in advance for a plurality of test subjects who have boarded the vehicle v. Next, the effective visual field is stored in advance in the control device 15 in association with the vehicle speed. Based on the vehicle speed information from the vehicle speed sensor 12, the setting unit 15 a reads the effective field of view corresponding to the vehicle speed from the effective field of view stored in the control device 15 and sets the effective field of view as the effective field of view of the driver 2. . Note that the effective field of view set by the setting unit 15a may be finely adjusted as required by the driver 2, for example.

  Here, the effective visual field has a substantially elliptical shape (see FIG. 2). Further, the center position of the effective visual field hardly changes depending on the speed of the vehicle if the driver 2 is the same driver 2 and is traveling straight ahead. On the other hand, the effective visual field becomes narrower as the vehicle speed increases.

  The control unit 15b moves the display position of the display image so that at least a part of the display image falls within the range of the effective visual field of the driver 2 set by the setting unit 15a. Here, “at least a part of the display image falls within the range of the effective visual field of the driver 2” means that the entire display image falls within the range, or a part thereof falls within the range. Say. In other words, as the vehicle speed detected by the vehicle speed sensor 12 increases, the display position of the display image is moved toward the center of the effective visual field of the driver 2.

  Specifically, as the vehicle speed increases, the control unit 15b moves the display position of the display image from the upper side to the upper side of the instrument panel 4 (see FIG. 2) when viewed in the vehicle front-rear direction. In addition, the display image is displayed on the lower end portion (a portion other than the center portion) of the effective field of view of the driver 2 in order to ensure the forward view of the driver 2 regardless of the vehicle speed. Furthermore, the distance from the driver 2 to the virtual image is increased as the vehicle speed increases. Thereby, the display image is displayed large. Here, as means for increasing the distance from the driver 2 to the virtual image, for example, the distance from the light source of the projection device 14 to the front window glass 3 is increased, or the focal length of the lens of the projection device 14 is increased. There is.

  Hereinafter, an example of the display will be described with reference to FIG. In FIG. 2, the outer oval-shaped broken line shows the effective field of view of the driver 2 (only the hand is shown in FIG. 2) during low-speed straight traveling at a predetermined speed or less, and the inner oval-shaped broken line is from the predetermined speed. 2 shows the effective field of view of the driver 2 when traveling at a high speed straight ahead. In FIG. 2, the black circle in the elliptical broken line indicates the center of the effective visual field of the driver 2. In FIG. 2, for the sake of convenience of explanation, the effective visual field and its center are shown, but these are not actually displayed.

  In FIG. 2, a display image l of a speed limit sign, a display image m for recognizing and supporting the distance between the vehicle ahead (hereinafter referred to as “display image m for assisting recognition of the distance between vehicles”), and a turn-by-turn display Image n is displayed in this order from the left side. Moreover, the code | symbol w shown in FIG. 2 is the road which comprises a real scene.

  In FIG. 2, during low-speed straight traveling, the speed limit sign display image l, inter-vehicle distance recognition support display image m, and turn-by-turn display image n (see the solid line) are all driven during low-speed straight traveling. It is within the range of the effective visual field of the person 2. At this time, these display images 1 to n are located immediately above the instrument panel 4 and at the lower end of the effective visual field in the vehicle longitudinal direction view.

  On the other hand, during straight traveling at high speed, a part of the display image l of the speed limit sign, the display image m for assisting recognition of the inter-vehicle distance, and the display image n of turn-by-turn (see the two-dot chain line) It falls within the range of 2 effective visual fields. At this time, these display images 1 to n are positioned above the display images 1 to n when traveling straight at a low speed when viewed in the vehicle longitudinal direction and at the lower end of the effective field of view when traveling at a high speed. Furthermore, the display images 1 to n are displayed larger than the display images 1 to n during low-speed straight traveling by making the distance from the driver 2 to the virtual image farther than during low-speed straight traveling.

-Effect-
As described above, according to the present embodiment, the controller 15b changes the display position of the display images 1 to n depending on the vehicle speed as the vehicle speed increases, that is, as the effective visual field of the driver 2 decreases. It moves to the center side of the effective visual field of the driver 2 who does not. For this reason, the recognizability of the display images 1 to n can be improved.

  Further, the control unit 15b moves the display positions of the display images 1 to n so that at least a part of the display images 1 to n falls within the range of the effective visual field of the driver 2 set based on the vehicle speed. Therefore, the recognizability of the display images 1 to n can be improved.

  In addition, as the vehicle speed increases, the control unit 15b moves the display positions of the display images 1 to n from the upper side to the upper side of the instrument panel 4 when viewed in the vehicle longitudinal direction. It is possible to reliably improve recognition.

  In addition, since the control unit 15b displays the display images 1 to n in a portion other than the center of the effective visual field of the driver 2, the driver 15b is compared with the case of displaying it in the central portion of the effective visual field of the driver 2. 2 forward visibility can be ensured.

  By the way, the driver's 2 gaze point generally becomes farther as the vehicle speed increases.

  Here, according to the present embodiment, the control unit 15b increases the distance from the driver 2 to the virtual image as the vehicle speed increases, so the display image that is a virtual image without the driver 2 moving the line of sight greatly. l to n can be recognized.

  Further, since the distance from the driver 2 to the virtual image is increased, the display images 1 to n are displayed large. For this reason, the recognizability of the display images 1 to n can be further improved during high speed traveling.

(Embodiment 2)
The present embodiment is different from the first embodiment in that the display image is displayed on one end in the vehicle width direction (portion other than the central portion) of the effective field of view of the driver 2. It is the same composition as. Therefore, in the following description, the same components as those of the first embodiment will be described using the same reference numerals.

  An example of display according to the present embodiment will be described with reference to FIG. The control unit 15b displays the display images 1 to n at the right end of the effective visual field of the driver 2 in the vehicle width direction in order to secure the forward view of the driver 2 during straight traveling at high speed. At this time, the display image l of the speed limit sign, the display image n of the turn-by-turn, and the display image m of the inter-vehicle distance recognition support are displayed in this order from the upper side. Also, only the turn-by-turn display image n is entirely within the range of the effective field of view of the driver 2 when traveling at high speed.

  According to this embodiment, substantially the same effect as that of the first embodiment can be obtained.

  In the present embodiment, the display images 1 to n are displayed at the right end of the effective visual field of the driver 2 in the vehicle width direction during high-speed straight traveling. However, the present invention is not limited to this, for example, as shown in FIG. It may be displayed at the left end. Here, which end is displayed is selected according to the traveling environment of the vehicle v, for example. Furthermore, you may display on not only the vehicle width direction both ends but an upper end part, for example.

(Embodiment 3)
The present embodiment is different from the first embodiment in that a plurality of types of display images are displayed during low-speed traveling, and one of the plurality of types of display images is selected and displayed during high-speed traveling. About a point, it is the structure similar to Embodiment 1. FIG. Therefore, in the following description, the same components as those of the first embodiment will be described using the same reference numerals.

  An example of display according to the present embodiment will be described with reference to FIG. The controller 15b displays three types (plural types) of display images, such as a speed limit sign, inter-vehicle distance recognition support, and turn-by-turn, during the low-speed straight traveling, as in the first embodiment. On the other hand, during high speed straight traveling, any one of the three types of display images 1 to n is selected and displayed. In this selection, for example, an optimal one corresponding to the traveling environment of the vehicle v is selected, or an item having a high priority in terms of safe driving of the vehicle v is selected. In FIG. 5, the display image 1 of the speed limit sign and the display image n of the turn-by-turn are selected and displayed. At this time, the display image 1 of the speed limit sign and the display image n of the turn-by-turn are displayed in this order on the left end portion of the effective visual field during high-speed straight traveling from above in order to secure the forward view of the driver 2. Yes. The display images l and n are entirely within the range of the effective field of view of the driver 2 when traveling at a high speed.

-Effect-
As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained.

  Further, the control unit 15b displays a plurality of types of display images during low-speed straight traveling, while selecting and displaying one of the plurality of types of display images l to n during high-speed traveling. For example, it is possible to select and display an optimal display image corresponding to the traveling environment of the vehicle v and a display image having a high priority in terms of safe traveling of the vehicle v.

(Embodiment 4)
The present embodiment is different from the first embodiment in that the display position of the display image is moved so as to be superimposed and displayed on the road w based on the position information of the road w from the front camera 11 when traveling at high speed. Although different, other configurations are the same as those in the first embodiment. Therefore, in the following description, the same components as those of the first embodiment will be described using the same reference numerals.

  An example of display according to the present embodiment will be described with reference to FIG. The control unit 15b displays only one type of speed limit sign as the display image. When the vehicle is traveling straight at a high speed, the display position of the display image l of the speed limit sign is moved so as to be superimposed on the road w. At this time, the display image l of the speed limit sign is displayed at the lower end portion of the effective visual field during high-speed straight traveling in order to secure the forward view of the driver 2. In addition, the entire display image l is within the range of the effective visual field of the driver 2 when traveling straight at high speed.

-Effect-
As described above, according to the present embodiment, the same effects as those of the first embodiment can be obtained.

  In addition, the controller 15b moves the display position of the display image l so that the display image l is superimposed and displayed on the road w that constitutes the actual scene during the high-speed straight traveling, so that the display image l constitutes the actual scene. Compared with a case where the display is superimposed on a roadside where a building or the like is installed, flickering of the display image l can be suppressed, and the recognizability of the display image l can be further improved.

(Other embodiments)
In each said embodiment, although the to-be-projected member which concerns on this invention was comprised with the front window glass 3, it may comprise not only this but with the combiner different from the front window glass 3 provided ahead of the driver | operator 2. Good.

  In each of the above embodiments, the display image 1 of the speed limit sign, the display image m of the inter-vehicle distance recognition support, and the display image n of turn-by-turn are displayed. However, the present invention is not limited to this. Then, a display image of the vehicle speed may be displayed.

  In each of the above embodiments, the display position of the display image is moved stepwise during low-speed straight traveling and high-speed straight traveling. However, the present invention is not limited to this, and the display position may be gradually moved as the vehicle speed increases. Good.

  Further, the constituent elements of the above embodiments may be arbitrarily combined without departing from the spirit of the present invention.

  As described above, the vehicular display device according to the present invention can be applied to uses and the like that need to improve the recognizability of a display image.

1 Head-up display (vehicle display device)
12 Vehicle speed sensor (vehicle speed detection means)
14 Projector 15 Controller 15a Setting Unit (Setting Unit)
15b Control unit (control means)
2 Driver 3 Front window glass (projected member)
4 Instrument panel l to n Display image

Claims (7)

A display device for a vehicle that superimposes and displays a display image that is a virtual image on a real scene by projecting an image onto a projection member in front of the driver,
Vehicle speed detection means for detecting the vehicle speed;
A vehicle display device comprising: control means for moving the display position of the display image toward the center of the driver's effective visual field as the vehicle speed detected by the vehicle speed detection means increases. A display device for a vehicle that superimposes and displays a display image that is a virtual image on a real scene by projecting an image onto a projection member in front of the driver,
Vehicle speed detection means for detecting the vehicle speed;
Setting means for setting the range of the effective visual field of the driver based on the vehicle speed detected by the vehicle speed detection means;
Control means for moving the display position of the display image so that at least a part of the display image falls within the range of the effective visual field of the driver set by the setting means. Vehicle display device. The vehicle display device according to claim 1 or 2,
The control means is configured to move the display position of the display image from directly above the instrument panel to the upper side in the vehicle front-rear direction view as the vehicle speed detected by the vehicle speed detection means increases. A display device for a vehicle. In the vehicle display device according to any one of claims 1 to 3,
The vehicle display device, wherein the control means is configured to display the display image on a portion other than a central portion of the driver's effective visual field. In the vehicle display device according to any one of claims 1 to 4,
The vehicle display device, wherein the control means is configured to increase the distance from the driver to the virtual image as the vehicle speed detected by the vehicle speed detection means increases. In the vehicle display device according to any one of claims 1 to 5,
The control means displays a plurality of types of the display image when the vehicle speed detected by the vehicle speed detection means is lower than a predetermined speed, while the vehicle speed detected by the vehicle speed detection means is higher than the predetermined speed. A vehicular display device configured to select and display any one of the plurality of types of display images during traveling. In the vehicle display device according to any one of claims 1 to 6,
When the vehicle speed detected by the vehicle speed detection means is higher than a predetermined speed, the control means moves the display position of the display image so that the display image is superimposed on the road constituting the actual scene. It is comprised in the vehicle display apparatus characterized by the above-mentioned.

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