JP2018193016A - Head-up display device - Google Patents

Abstract

To provide a head-up display device capable of displaying information that an additionally displayed virtual image presents in an easy-to-recognize state.SOLUTION: A head-up display device 10 comprises: a projection part 40 which projects display light L, capable of displaying a virtual image 70 at a position different in display distance from a viewer, on a projected part; a display control part 30 which adjusts a display distance of the virtual image 70 that the projection part 40 displays; and an information acquisition part 20 which acquires information from the outside. The display control part 30 performs control to display a first virtual image at a first display distance based upon first information as information nearby a vehicle that the information acquisition part 20 acquires, compares the first information with second information as information in a vehicle traveling direction that the information acquisition part 20 acquires, and performs control to display a second virtual image at a second display distance based upon the second information when the first information and second information are different.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a head-up display (HUD) device mounted on a vehicle.

  The HUD device disclosed in Patent Document 1 allows a viewer (generally a driver of a vehicle) to visually recognize a virtual image superimposed on the foreground of the vehicle. In this way, the HUD device displays the virtual image that presents information to the viewer so as to overlap the foreground, thereby allowing the viewer to recognize the information indicated by the virtual image without greatly shifting the line of sight from the foreground. This reduces the load of the person's eye movement and contributes to safe driving.

Japanese Patent Laying-Open No. 2015-101311

  Depending on the input information, the HUD device may increase or decrease the information transmitted to the viewer even when the vehicle is traveling. In other words, the virtual image displayed by the HUD device increases or decreases while the vehicle is traveling. For example, if the viewer happens to stare at the position where the virtual image is added, the viewer can immediately recognize the displayed virtual image, but if the viewer does not stare at the position where the virtual image is added, Even if it can be recognized that some kind of virtual image has been added by vision, to identify the added virtual image, move the line of sight to multiple virtual images that exist in the area where the virtual image seems to have been added by peripheral vision. It is necessary to consider whether or not the virtual image was originally displayed, and the burden on the viewer is large in order to identify the added virtual image, and countermeasures have been required.

  An object of the present invention is to provide a head-up display device capable of easily recognizing information presented by an additionally displayed virtual image.

The head-up display device 10 of the present invention includes:
A projection unit 40 that projects the display light L capable of displaying the virtual image 70 at a position where the display distance from the viewer is different toward the projection unit;
A display control unit 30 for adjusting the display distance of the virtual image 70 displayed by the projection unit 40;
An information acquisition unit 20 for acquiring information from outside,
The display control unit 30
Control to display the first virtual image 73 at the first display distance 85 based on the first information that is the information in the vicinity of the vehicle acquired by the information acquisition unit 20,
The first information is compared with the second information that is the information on the vehicle traveling direction acquired by the information acquisition unit 20, and when the first information and the second information are different, the first information is based on the second information. The second virtual image 74 is controlled to be displayed at the second display distance 86.

  The display control unit 30 controls to display the first virtual image 73 closer to the viewer than the second virtual image 74.

  The display control unit 30 controls to display the third virtual image 75 indicating the switching point between the first information and the second information at the third display distance 87.

  The display controller 30 controls the second display distance 86 and the third display distance 87 to be equal.

  In the first embodiment, the display control unit 30 moves the first virtual image 73 in a predetermined direction when the difference between the first display distance 85 and the second display distance 86 is within a predetermined range. It is characterized by controlling.

  In the second embodiment, the display control unit 30 performs control so that the first virtual image 73 is reduced and displayed when the difference between the first display distance 85 and the second display distance 86 is within a predetermined range. It is characterized by.

  In the third embodiment, the display control unit 30 controls to enlarge and display the first virtual image 73 when the difference between the first display distance 85 and the second display distance 86 is within a predetermined range. It is characterized by.

  In the fourth embodiment, the display control unit 30 has at least one of brightness and saturation of the first virtual image 73 when the difference between the first display distance 85 and the second display distance 86 is within a predetermined range. The display is controlled so as to be lowered.

  In the fifth embodiment, the display control unit 30 includes at least one of the first virtual image 73 and the second virtual image 74 when the difference between the first display distance 85 and the second display distance 86 is within a predetermined range. One of the display colors is controlled to be changed.

  ADVANTAGE OF THE INVENTION According to this invention, the head-up display apparatus which can display easily the information which the additionally displayed virtual image presents can be provided.

It is a figure explaining the structure of the HUD apparatus which concerns on the 1st-5th embodiment of this invention, and the virtual image which this HUD apparatus displays. It is a figure which shows the structure of the projection part in the HUD apparatus of the said embodiment. It is a flowchart which shows the main operation | movement procedures of the HUD apparatus in the said embodiment. It is a figure which shows the example of a display of the virtual image which the HUD apparatus in the said embodiment displays. It is a figure which shows the example of a display transition of the virtual image which the HUD apparatus in 1st Embodiment displays. It is a figure which shows the example of a display transition of the virtual image which the HUD apparatus in 2nd Embodiment displays. It is a figure which shows the example of a display transition of the virtual image which the HUD apparatus in 3rd Embodiment displays. It is a figure which shows the example of a display transition of the virtual image which the HUD apparatus in 4th Embodiment displays. It is a figure which shows another embodiment of FIG.4 (b).

  The embodiments described below are used to easily understand the present invention, and those skilled in the art should note that the present invention is not unduly limited by the embodiments described below.

  FIG. 1 illustrates a configuration corresponding to the first to fifth embodiments of a head-up display device (hereinafter, also referred to as HUD) device 10 according to the present invention, and a virtual image 70 displayed by the HUD device 10. FIG. In FIG. 1, the front-rear direction of the vehicle 1 is the Z direction (the forward direction is the Z positive direction), and the direction along the left and right direction of the vehicle 1 (the width direction of the vehicle 1) is the X direction (the left direction is the X positive direction). And the vertical direction is the Y direction (the upward direction is the positive Y direction).

  In FIG. 1, the HUD device 10 of the present embodiment is connected to a communication interface 5 so as to be communicable. The communication interface 5 may include wired communication functions such as, for example, a USB port, serial port, parallel port, OBDII, and / or any other suitable wired communication port. A data cable from the vehicle 1 is connected to the information acquisition unit 20 of the HUD device 10 via the communication interface 5 in order to transmit information to the HUD device 10. In other embodiments, the communication interface 5 may be, for example, a Bluetooth (registered trademark) communication protocol, an IEEE 802.11 protocol, an IEEE 802.16 protocol, a shared radio access protocol, a wireless USB protocol, and / or any other suitable A wireless communication interface using various wireless communication technologies.

[Configuration of HUD Device 10]
The HUD device 10 includes an information acquisition unit 20 that is an input interface that acquires various types of information from the communication interface 5, a display control unit 30, and a projection unit 40 that projects display light L. For example, the communication interface 5 is connected to a vehicle ECU, a vehicle-mounted camera, a sensor, another vehicle-mounted device, a portable device, another vehicle, a communication infrastructure on the road, and the like provided in the vehicle 1 so as to be able to exchange information. 10 inputs various types of information from the information acquisition unit 20 connected to the communication interface 5 and reflects them in the virtual image 70 to be displayed.

  The HUD device 10 of the present embodiment projects display light L toward the projection target 2 that is provided inside the vehicle 1 and transmits part of light and reflects part of light. This projection part 2 may be comprised by a part of front windshield of the vehicle 1, and may be exclusive parts, such as a combiner. An eye box 4 is formed by the display light L reflected by the projection target 2 in an area where the viewer's viewpoint 3 is supposed to be placed. The viewer can visually recognize the entire virtual image 70 displayed by the HUD device 10 by placing the viewpoint 3 in the eye box 4. When the viewpoint 3 is out of the eye box 4, a part of the virtual image 70 is visually recognized. It becomes impossible (it becomes difficult to see). The HUD device 10 of the present embodiment can adjust the positions where the virtual images 71 and 72 are displayed in the X direction, the Y direction, and the Z direction. That is, the HUD device 10 can adjust the display distance 80, which is the distance in the Z direction between the eye box 4 and the formation of the virtual images 71 and 72, in particular. Can be displayed.

  The display control unit 30 includes a display addition determination unit 31, a display distance determination unit 32, a display data generation unit 33, and a condition establishment determination unit 34. The display control unit 30 generates display data based on the information acquired from the information acquisition unit 20, and displays the virtual image 70 by driving the projection unit 40 based on the display data. In particular, the display control unit 30 in the present embodiment can adjust the display distance 80 of the virtual image 70 (specifically, the virtual images 71 and 72 in the virtual image 70).

  The display addition determination unit 31 inputs information acquired from the information acquisition unit 20 via the communication interface 5 and adds a new virtual image 70 (described later) to the already displayed virtual image 70 (existing virtual image 73 described later). It is determined whether to add a virtual image 74) to be additionally displayed. The display addition determination unit 31 is, for example, information that has been newly acquired by the information acquisition unit 20, the acquired information is a predetermined type of information, and the acquired information is information that satisfies a predetermined condition Alternatively, when a predetermined combination is established with a plurality of pieces of acquired information, it is determined that a condition for adding a new virtual image 70 is satisfied.

  The display distance determination unit 32 can determine the display distance 80 of the virtual image 70, and when the display addition determination unit 31 determines to additionally display the virtual image 70, the display distance 85 of the existing virtual image 73 that is already displayed, The display distance 80 of each virtual image 70 is determined so that the display distance 86 of the additionally displayed virtual image 74 is different (see FIGS. 4 to 8). This will be described in detail in the first to fifth embodiments when the virtual image 70 is additionally displayed.

  The display data generation unit 33 generates display data, and the projection unit 40 is driven based on the display data. The display data includes display distance data for driving the projection unit 40 to display each virtual image 70 at the display distance 80 determined by the display distance determination unit 32.

[Explanation of virtual image]
An example of a virtual image 70 displayed by the HUD device 10 of the present embodiment will be described using the left diagram of FIG. The virtual image 70 includes, for example, a 2D virtual image 71 expressed in a planar manner and a 3D virtual image 72 expressed in a stereoscopic manner. An example of the 2D virtual image 71 is a virtual image that is planarly formed on the XY plane having the display distance 81 in FIG. 1 and does not cause the viewer to feel a sense of perspective. According to such an example of the 2D virtual image 71, the entire display can be clearly recognized without adjusting the focus of the eyes. Further, another example of the 2D virtual image 71 has one end on the XY plane at the display distance 83 in FIG. 1, and the other end on the XY plane at the display distance 84 farther from the viewer than the display distance 83. It is a virtual image that is imaged and gives the viewer a sense of perspective. Such a 2D virtual image 71 as another example can give a three-dimensional impression because the entire display is clearly recognized by adjusting the focus of the eyes of the viewer. An example of the 3D virtual image 72 is a three-dimensional image having one end on the XY plane at the display distance 82 in FIG. 1 and the other end on the XY plane at the display distance 83 farther from the viewer than the display distance 82 and having a volume. It is a virtual image that is imaged as a typical object and makes the viewer feel a three-dimensional effect. In addition, the HUD device 10 of the present invention makes the display distance of the virtual image to be additionally displayed different from the display distance of the existing virtual image that has already been displayed. In other words, increasing the display distance 80 indicates that the virtual image 70 is formed at a position further away from the eye box 4. For example, the 2D virtual image 71, the display distance 82, and the display distance 83 displayed at the display distance 81 are displayed. It shows that the 3D virtual image 72 displayed between is brought closer to the display distance 84 on the far side. In other words, shortening the display distance 80 means that the virtual image 70 is formed at a position closer to the eye box 4. For example, the 2D virtual image 71 displayed at the display distance 84, the display distance 82, and the display distance 3D, the 3D virtual image 72 displayed between the display area 83 and the display distance 81 on the near side.

[Configuration Example of Projection Unit 40]
Reference is now made to FIG. FIG. 2 is a diagram illustrating a configuration example of the projection unit 40 of FIG. The projection unit 40 according to the present embodiment includes a stereoscopic image display unit 41 and a relay optical unit 42. The stereoscopic image display unit 41 forms a first 3D real image 43, and the relay optical unit 42 has a first configuration. The 3D real image 43 is enlarged to form a second 3D real image 44, and the display light L of the second 3D real image 44 is projected toward the external projection unit 2.

  The stereoscopic image display unit 41 in FIG. 2 generates a first 3D real image 43 formed in three dimensions, and includes an image projection unit 45 and a vibrating screen 46.

The image projection unit 45 is a projector that emits video light (not shown) representing the video included in the display data based on the display data input from the display control unit 30, and displays the display distance data included in the display data. Accordingly, the timing for displaying the video is adjusted, and the video to be projected is switched at high speed in synchronization with the vibration position of the vibration screen 46. In other words, the image projection unit 45 projects the image suitable for the vibration position of the vibration screen 46 on the vibration screen 46 based on the display distance data.

The vibrating screen 46 is, for example, a polycarbonate diffusing film that diffuses the image of the image projection unit 45 in a certain angle range. The vibration screen 46 receives the image light from the image projection unit 45 and forms a real image. 45 reciprocates along the optical axis of the image light emitted. The vibration screen 46 can transmit a signal indicating the vibration position to the image projection unit 45 continuously or intermittently. The image projection unit 45 may adjust the timing for displaying the video so that the virtual image 70 is visually recognized at a position corresponding to the display distance data included in the display data on the basis of the signal indicating the vibration position. .

  In the present embodiment, the display control unit 30 adjusts the length of the virtual image 70 in the depth direction Z while keeping the amplitude of the vibration screen 46 in the screen vibration direction constant. That is, the display control unit 30 does not emit the display light L during a period in which the vibration screen 46 is located in the first range of the amplitude, and the vibration screen 46 is located in the second range of the amplitude. The display light L is emitted during this period. The position and length in the depth direction Z of the virtual image 70 are adjusted by adjusting the positions and ratios of the first range and the second range. Specifically, the vibrating screen 46 vibrates at a frequency of 60 [Hz] or more, and the image projection unit 45 projects different images of a plurality of frames within this period 1/60 [sec], so that each vibration position is A plurality of frames of different images (real images) are formed. That is, in the present embodiment, the first 3D real image 43 is generated by overlapping the real images of a plurality of frames in the vibration direction of the vibration screen 46. The display control unit 30 may adjust the length of the virtual image 70 in the depth direction Z by changing the amplitude of the vibrating screen 46.

2 receives the light of the first 3D real image 43 generated by the stereoscopic image display unit 41, and forms a second 3D real image 44 obtained by enlarging the first 3D real image 43 in the middle. Thereafter, the display light L that is the light of the second 3D real image 44 is projected toward the projection target section 2. The relay optical unit 42 passes, for example, a first relay optical unit 47 including a lens group that receives light of the first 3D real image 43 generated by the stereoscopic image display unit 41, and the first relay optical unit 47. A second relay optical unit 48 that reflects light and forms a second 3D real image 44 obtained by enlarging the first 3D real image 43 in cooperation with the optical power of the first relay optical unit 47; And a third relay optical unit 49 that reflects the display light L, which is the light of the second 3D real image 44, toward the projection target unit 2.

The first relay optical unit 47 has a function of enlarging each image formed at each vibration position of the vibration screen 46 in the first 3D real image 43 at different magnifications. In FIG. Although it is shown in the lens, it is actually composed of a composite lens in which a plurality of thin film lenses (not shown) are combined.

The second relay optical unit 48 is constituted by, for example, a mirror having a concave reflecting surface having positive optical power, and the light of the first 3D real image 43 is incident from the first relay optical unit 47. A second 3D real image 44 that reflects incident light toward the third relay optical unit 49 and expands the first 3D real image 43 in cooperation with the optical power of the first relay optical unit 47. An image is formed between the second relay optical unit 48 and the third relay optical unit 49. In addition, the 2nd relay optical part 48 may be abbreviate | omitted by giving the 1st relay optical part 47 the optical effect | action which the 2nd relay optical part 48 bears.

The third relay optical unit 49 is a concave mirror that reflects the display light L of the second 3D real image 44 toward the projection unit 2, and has a function of correcting image distortion due to the curved shape of the projection unit 2. And a function of enlarging the second 3D real image 44.

The above is the configuration of the embodiment of the projection unit 40 that visually recognizes the 3D virtual image 70, but is not limited thereto. Below, the modification of the projection part 40 is shown.

[Modification of Projection Unit 40]
In another embodiment for visually recognizing a stereoscopic virtual image, the projection unit 40 includes a parallax division method including a parallax barrier method and a lenticular lens method, a spatial reproduction method including a light field method and a hologram method, and Japanese Patent Application Laid-Open No. 2016-212318. A plurality of screens having a light control layer whose transmittance can be adjusted are arranged in the thickness direction as disclosed in the above, and the projector projects the projected images while switching the projected images at high speed toward the plurality of screens. In accordance with the high-speed switching, a plurality of screens adjust the dimming rate as appropriate so that a 3D real image is displayed inside, and a plurality of liquid crystals as disclosed in JP-A-2004-168230 A method of displaying a 3D real image inside by superimposing display elements in the thickness direction may be employed.
The above is the configuration of the HUD device 10 according to the first to fourth embodiments of the present invention.

Hereinafter, the first to fifth embodiments will be specifically described with reference to FIGS.
(First embodiment)
First, FIG. 3 to FIG. 5 will be referred to. FIG. 3 is a flowchart showing main operation procedures of the HUD device 10 in the first to fifth embodiments, and FIG. 4 is a display example of virtual images 73, 74, 75 corresponding to the flowchart of FIG. FIG. FIG. 5 is a diagram illustrating a display transition example of the virtual images 73 and 74 in the first embodiment.

  FIG. 4A shows a display example before the additionally displayed virtual image (second virtual image) 74 is displayed (only the virtual image (first virtual image) 73 is displayed). b) shows a display example after the display is updated in step S15 after step S13 in FIG. 3 is executed. FIGS. 4A and 4B are diagrams showing foregrounds (buildings, roads, white lines, etc.) and virtual images 73 and 74 visually recognized when a viewer looks at the front (Z-axis positive direction) of the vehicle 1. . The virtual image 73 is displayed at a display distance (first display distance) 85 and the virtual image 74 is displayed at a display distance (second display distance) 86.

  In step S11 of FIG. 3, the display control unit 30 provides information (first information) such as a road sign near the front of the vehicle 1 (Z-axis positive direction), road traffic information (congestion and traffic regulation), etc., via the information acquisition unit 20. Information) and information (second information) such as road signs and road traffic information farther from the vicinity of the vehicle 1 (in front of the vehicle 1). The display control unit 30 acquires various types of information periodically and / or instantaneously when various types of information are generated via the information acquisition unit 20. The information acquisition unit 20 acquires the current position of the vehicle and road traffic information from GNSS (Global Navigation Satellite System), VICS (registered trademark) (Vehicle Information and Communications System), and the camera mounted on the vehicle. You may comprise so that it can.

  Subsequently, in step S <b> 12, the display addition determination unit 31 determines whether to additionally display the virtual image 70. The display addition determination unit 31 is, for example, information in which both the first information and the second information indicate the maximum speed (restricted speed). If the contents of the first information and the second information are different, a new virtual image 70 is displayed. It is determined that the condition for adding is satisfied. When it is determined in step S12 that display is not added (in the case of NO), the process proceeds to step S14 to generate display data in which information of the already displayed virtual image (first virtual image) 73 is updated. In S15, the display is updated.

  In step S12, “when it is determined that display is to be added (in the case of YES)”, in step S13, the display distance determination unit 32 indicates the existing maximum speed of 80 Km / h or less already displayed as shown in FIG. While maintaining the display distance 85 of the virtual image 73, the display distance 86 of the virtual image (second virtual image) 74 indicating the maximum speed of 100 Km / h or less to be additionally displayed is determined. Then, the display data generation unit 33 generates display data (virtual image 74) so that the virtual images 73 and 74 are visually recognized at the display distances (first and second display distances) 85 and 86 determined by the display distance determination unit 32. (Step S14), and the display control unit 30 updates the display by driving the projection unit 40 based on the display data (Step S15). The virtual image 73 is displayed at a predetermined display distance 85, and the virtual image 74 is displayed at a display distance 86 corresponding to the vicinity of the position where the first information is switched to the second information. Since the display distance 86 is farther from the viewer than the display distance 85, the viewer sees the virtual image 73 as if it were in front of the virtual image 74. As the vehicle 1 travels forward, the display control unit 30 generates display data so that the virtual image 74 has a display distance closer to the virtual image 73. The display control unit 30 generates display data so that the virtual image 74 approaches the virtual image 73 at a time corresponding to the vehicle speed of the vehicle 1. When the vehicle speed of the vehicle 1 is equal to or higher than a predetermined speed, the display control unit 30 may generate display data so that the virtual image 74 gradually approaches the virtual image 73 in a predetermined time.

  When the vehicle 1 approaches a point where the traffic environment (road sign or road traffic information) changes, the new road sign or the sign indicating the road traffic information gradually approaches the current road sign or the sign indicating the road traffic information. By changing the display data, the viewer can operate the vehicle 1 based on the latest road signs and road traffic information without overlooking changes in the traffic environment.

  As shown in FIG. 4B, the display control unit 30 switches the first and second information from a virtual image (third virtual image) 75 indicating, for example, a U-shaped auxiliary symbol in step S14. A display distance 87 corresponding to the point can be added. In this case, the virtual image 75 is visually recognized by the viewer as if it is superimposed on the road surface where the maximum speed changes. The display distance 86 may be equal to the display distance 87.

  By additionally displaying the virtual image 75, the viewer can intuitively recognize the location where the traffic environment changes. Further, by making the display distance 86 equal to the display distance 87, the virtual image 74 is more emphasized.

  When the difference between the display distance 85 and the display distance 86 is within a predetermined range, for example, as shown in FIGS. 5A to 5F, the display control unit 30 sets the virtual image 73 in a predetermined direction according to the vehicle speed. Display data is generated so that the animation is moved outside the display range at the time. After the virtual image 73 moves out of the display range, the first information is replaced with the content of the second information, and thus display data is generated so that the virtual image 73 corresponding to the new first information is displayed.

  By performing an animation display in which the virtual image 73 moves outside the display range, the viewer can intuitively recognize that the traffic environment has changed.

(Second Embodiment)
The second embodiment is the same as the first embodiment until the virtual image 74 is additionally displayed.

  When the difference between the display distance 85 and the display distance 86 is within a predetermined range, the display control unit 30 reduces the virtual image 73 at a predetermined time corresponding to the vehicle speed, for example, as shown in FIGS. 6 (a) to 6 (d). Display data is generated so as to be an animation to be displayed. After a predetermined time elapses, display data is generated so that a virtual image 73 corresponding to new first information is displayed.

  By performing the animation display in which the virtual image 73 is reduced, the viewer can intuitively recognize that the traffic environment has changed.

(Third embodiment)
The third embodiment is the same as the first embodiment until the virtual image 74 is additionally displayed.

  When the difference between the display distance 85 and the display distance 86 is within a predetermined range, for example, as shown in the order of FIGS. 7A to 7D, the display control unit 30 enlarges the virtual image 73 at a predetermined time corresponding to the vehicle speed. Display data is generated so as to be an animation to be displayed. After a predetermined time elapses, display data is generated so that a virtual image 73 corresponding to new first information is displayed.

  By performing the animation display in which the virtual image 73 is enlarged, the viewer can intuitively recognize that the traffic environment has changed.

(Fourth embodiment)
The fourth embodiment is the same as the first embodiment until the virtual image 74 is additionally displayed.

  When the difference between the display distance 85 and the display distance 86 is within a predetermined range, for example, as shown in the order of FIGS. 8A to 8D, the display control unit 30 determines at least one of brightness and saturation of the virtual image 73 as the vehicle speed. Display data is generated so that the animation is gradually lowered at a predetermined time according to. After a predetermined time elapses, display data is generated so that a virtual image 73 corresponding to new first information is displayed.

  By performing an animation display in which at least one of lightness and saturation of the virtual image 73 is gradually lowered, the viewer can intuitively recognize that the traffic environment has changed.

(Fifth embodiment)
The fifth embodiment is the same as the first embodiment until the virtual image 74 is additionally displayed.

  When at least a part of the virtual image 73 and the virtual image 74 overlaps by a predetermined area or more, the display control unit 30 displays the display data so as to change the display color of at least one of the virtual image 73 and the virtual image 74 at a predetermined time according to the vehicle speed. Is generated. After a predetermined time elapses, display data is generated so that a virtual image 73 corresponding to new first information is displayed.

  By performing an animation display that changes the display color of at least one of the virtual image 73 and the virtual image 74, the viewer's impression is emphasized, and it is possible to intuitively recognize that the signs and regulations have changed.

[Modification]
In addition, this invention is not limited by the above-mentioned embodiment and drawing. Changes (including deletion of constituent elements) can be added to the embodiments and the drawings as appropriate without departing from the scope of the present invention. Below, an example of a modification is described.

  In the above-described embodiment, the case where the foreground (a building, a road, a white line, etc.) of the vehicle 1 is a real landscape through the projection unit 2 is illustrated, but the foreground is based on information such as a camera mounted on the vehicle 1. Can be displayed as a virtual image.

  In the above-described embodiment, the case where the third virtual image 75 has a U-shape is illustrated, but the third virtual image 75a may have a height from a road surface such as a wall or a fence as shown in FIG. In addition, the same effect can be expected by changing the display color and contrast, or performing emphasis expression using shapes other than those described above.

  Further, the third virtual image 75 can be configured such that the viewer can select the shape, thickness, color, and the like in advance.

  In the above-described embodiment, the case where the display is switched after the virtual image 73 based on the first information is moved in the upper direction of the display image is illustrated, but the moving direction is arbitrary.

  Further, in the above-described embodiment, the case where the road sign indicating the maximum speed or the road traffic information is switched is exemplified, but the present invention can also be applied when the guide sign, the warning sign, the regulation sign, the instruction sign, the auxiliary sign, and the like are switched. It is.

  The present invention can be used for a head-up display device mounted on a vehicle.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Projected part 3 View point 4 Eye box 5 Communication interface 10 HUD device (head-up display device)
DESCRIPTION OF SYMBOLS 20 Information acquisition part 30 Display control part 31 Display addition determination part 32 Display distance determination part 33 Display data generation part 34 Condition establishment determination part 40 Projection part 41 Stereoscopic image display part 42 Relay optical part 43 1st 3D real image 44 2nd 3D real image 45 Image projection unit 46 Vibrating screen 70 Virtual image 73 First virtual image 74 Second virtual image 75 Third virtual image 75a Third virtual image 80 Display distance 85 First display distance 86 Second display distance 87 Third display Display distance L Display light

Claims (9)

A projection unit that projects display light that can display a virtual image at a position where the display distance from the viewer is different, toward the projection unit; and
A display control unit for adjusting the display distance of the virtual image displayed by the projection unit;
An information acquisition unit for acquiring information from outside,
The display control unit
Control to display the first virtual image at the first display distance based on the first information that is the information in the vicinity of the vehicle acquired by the information acquisition unit,
When the first information is compared with second information that is information on the vehicle traveling direction acquired by the information acquisition unit, the second information is different when the first information and the second information are different. And controlling to display the second virtual image at the second display distance based on the above. The display control unit
2. The head-up display device according to claim 1, wherein the first virtual image is controlled to be displayed closer to a viewer than the second virtual image. The display control unit
3. The head according to claim 1, wherein control is performed so that a third virtual image indicating a switching point between the first information and the second information is displayed at the third display distance. 4. Up display device. The display control unit
The head-up display device according to claim 3, wherein the second display distance and the third display distance are controlled to be equal. The display control unit
The first virtual image is controlled to move in a predetermined direction when a difference between the first display distance and the second display distance is within a predetermined range. 5. The head-up display device according to any one of 4 above. The display control unit
5. The control according to claim 1, wherein when the difference between the first display distance and the second display distance is within a predetermined range, the first virtual image is controlled to be reduced and displayed. A head-up display device according to claim 1. The display control unit
5. The control according to claim 1, wherein the first virtual image is controlled to be enlarged and displayed when a difference between the first display distance and the second display distance is within a predetermined range. A head-up display device according to claim 1. The display control unit
When the difference between the first display distance and the second display distance is within a predetermined range, control is performed such that at least one of brightness and saturation of the first virtual image is lowered and displayed. The head-up display device according to any one of claims 1 to 4. The display control unit
Control is performed to change a display color of at least one of the first virtual image and the second virtual image when a difference between the first display distance and the second display distance is within a predetermined range. The head-up display device according to any one of claims 5 to 7.

Images