JP2016078715A - Vehicle display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle display device for displaying an image of a virtual measuring instrument, capable of displaying the image so that the texture and the appearance of solidity that an actual measuring instrument exhibits can be sufficiently reproduced, a vehicle passenger can recognize the image as a three-dimensional image, and the vehicle passenger can easily recognize a positional relation when a plurality of virtual measuring instruments is displayed.SOLUTION: Virtual measuring instruments 101 to 105 and a ground surface 200 are disposed within a virtual space 100, virtual light is radiated from a virtual light source 150 so as to cause the measuring instruments 101 to 105 to form reflection light and shades, those shades 201 to 205 are formed on the ground surface and an image including those shades viewed from a virtual viewpoint 160 is displayed on a vehicle display device. At that time, a position of the virtual light source is moved, thereby changing the reflection light, the shades and shadows on measuring instrument surfaces.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle display device.

  2. Description of the Related Art Recently, in a display device for an automobile, a display device is configured with a liquid crystal display (LCD) or the like, and an image of a virtual meter (instrument) created by computer graphics technology is displayed on the screen. Cases are increasing. In that case, various meters such as speedometers, tachometers, water temperature gauges, fuel fuel gauges, etc. can be displayed together on a single screen. There are many advantages such as ease of use and high degree of freedom of design change.

  For example, Patent Document 1 below discloses a technique for expressing glossiness with a ring image, which is a frame portion of a meter, and automatically changing the portion indicated by the pointer to a luminance that is easy to visually recognize.

JP 2004-157434 A

  However, there is a problem that the display of the virtual meter image is easy to see in a plane, and even using Patent Document 1, the texture and stereoscopic effect of the real meter cannot be sufficiently reproduced. Accordingly, it is desired to develop a meter image that improves realism and is recognized as a stereoscopic image by a vehicle occupant.

  An object of the present invention is a display device for a vehicle that displays an image of a virtual instrument, which can sufficiently reproduce the texture and stereoscopic effect of a real instrument, and is recognized as a three-dimensional image by a vehicle occupant. In addition, an object of the present invention is to provide a vehicular display device capable of performing display in which when a plurality of virtual instruments are displayed, the positional relationship between them can be easily recognized by a vehicle occupant.

Means for Solving the Problems and Effects of the Invention

In order to achieve the above object, a vehicle display device according to the present invention includes:
A display unit disposed in a vehicle interior of the vehicle, and a display control unit configured to control the display unit to display an image of a virtual three-dimensional instrument that displays a measurement value obtained by a measurement unit equipped in the vehicle. With
The display control unit includes a setting unit that sets positions of a virtual light source, a virtual viewpoint, and a virtual ground surface in a virtual space, an image viewed from the virtual viewpoint, and the virtual three-dimensional instrument, Shadows of the virtual three-dimensional instrument projected on the virtual ground surface by virtual light emitted from the virtual light source positioned by the setting means and the virtual light source positioned by the setting means And image processing means for forming an image on which
It is characterized by providing.

  According to the above configuration of the present invention, when light is emitted from a virtual light source to a virtual stereo instrument arranged on the upper side of the virtual ground surface, the shadow of the virtual stereo instrument formed by the light is reflected. Represented on the virtual ground surface. If there are multiple virtual three-dimensional instruments and they are arranged with their positions shifted in the depth direction, if there is no shadow on the ground surface under the three-dimensional instrument, the positional relationship in the depth direction is displayed from the screen. It is difficult to grasp. In the present invention, since shadows on such virtual three-dimensional instruments are projected, it is easy to grasp the positional relationship between these three-dimensional instruments.

  In the present invention, the image processing unit is configured to draw the virtual three-dimensional instrument that receives virtual light emitted from a virtual light source positioned by the setting unit. Can be formed. According to this configuration, the virtual three-dimensional instrument displayed on the screen can effectively express the realism and the three-dimensional effect by the reflected light and shadow generated by the light of the virtual light source.

  In the present invention, the setting means moves the position of the virtual light source so that the reflected light and shadow in the virtual three-dimensional instrument and the shadow projected on the virtual ground surface change. be able to. According to this configuration, the reflected light or shadow of the virtual three-dimensional instrument displayed on the screen changes due to the movement of the virtual light source. The visual effect of such reflected reflected light and shading makes it possible to display an instrument that is visually recognized as having a three-dimensional effect.

  In the present invention, the image processing means can form the image in a form in which the virtual light source whose position is set by the setting means is drawn. According to this configuration, the shadow of the virtual three-dimensional instrument and the position of the light source that forms the shadow are clarified on the screen. Since the three-dimensional instrument exists between the light source and the shadow, it is possible to more easily grasp the position of the three-dimensional instrument.

The block diagram of the display apparatus for vehicles in the Example of this invention. The figure which shows virtual space. The flowchart of a display control process. The 1st figure which showed the example of a screen display which can be implemented in the display apparatus for vehicles of FIG. The 2nd figure which showed the example of a screen display which can be implemented in the display apparatus for vehicles of FIG. FIG. 6 is a first diagram showing a screen display example that can be implemented in the vehicle display device of FIG. 1, and shows a screen display different from FIGS. 4 and 5. FIG. 6 is a second diagram showing a screen display example that can be implemented in the vehicle display device of FIG. 1, and shows a screen display different from FIGS. 4 and 5.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 is a schematic diagram of a device configuration in Example 1 of a vehicle display device 1 (display device) according to the present invention. FIG. 1 shows a case where the display device is a combination meter.

  The display device 1 is installed in, for example, an automobile vehicle. The display device 1 according to the present embodiment includes a combination meter 2 that displays a combination of vehicle speed, engine speed, and the like, and a body ECU (Electronic Control Unit) 3. It is connected and can exchange information. The in-vehicle communication 4 may be, for example, CAN (Controller Area Network) communication.

  The combination meter 2 includes a CPU 21 that executes various calculations and information processing for image processing to be described later, a RAM 22 that is a temporary storage unit as its work area, a ROM 23 that stores various information, and a body ECU 3. And an interface unit 20 (I / F) for communication with other parts in the vehicle.

  The combination meter 2 further includes a drawing LSI 24, a graphic memory 25, an LCD 26 (liquid crystal display: display unit), and a backlight module 27. An image is formed on the graphic memory 25 by the drawing LSI 24, the image is transmitted to the LCD 26, and light is emitted from the back side by the backlight module 27, so that the user can visually recognize the image. The LCD 26 may be installed, for example, in the front of the driver's seat of the vehicle instrument panel. Although FIG. 1 shows the case where the LCD 26 is used, a display of another display method may be used.

  The body ECU 3 (ECU) includes a vehicle speed sensor 30 that detects the vehicle speed, an engine speed sensor 31 that measures the engine speed (per unit time), and a remaining fuel sensor that detects the remaining amount of fuel in the fuel tank. 32, a water temperature sensor 33 for detecting the temperature of the cooling water of the engine, and a known sensor such as an oil pressure sensor 34 for connecting the pressure of the engine oil are connected.

  Under the above configuration, the display device 1 executes display related to the traveling state of the vehicle. Specifically, a computer graphics technique is used to form a virtual ground surface in the virtual space and a virtual three-dimensional instrument (hereinafter referred to as a virtual instrument) on the upper side, and see them from a virtual viewpoint. The displayed image is displayed on the LCD 26. Examples are shown in FIGS. 2, 4 and 5. FIG. FIG. 2 shows a virtual space, a virtual instrument, a virtual viewpoint, a virtual ground surface, and the like arranged in the virtual space. 4 and 5 show display examples on the LCD 26. FIG.

  First, FIG. 2 will be described. The virtual space 100 is formed in the combination meter 2, specifically on the RAM 22, and in the same space, a plurality of virtual instruments 101, 102, 103, 104, 105, a virtual viewpoint 160, a virtual light source 150, a virtual A ground surface 200 is set. Their relative positional relationship is set by the CPU 21.

  Of the virtual meters 101, 102, 103, 104, 105, the meter 101 is a water temperature meter, the meter 102 is a tachometer (rotometer, engine speed meter), the meter 103 is a speedometer, the meter 104 is a fuel fuel gauge, and the meter 105 Is the oil pressure gauge. As shown in FIG. 2, FIG. 4 and FIG. 5, these five virtual instruments are all circular analog type instruments, and they all have a scale 111 arranged in an arc shape and a rotating (swinging) ) And a pointer portion 112 arranged so as to indicate the measured value. In addition, an annular frame portion 110 (ring) is formed on all peripheral edges of the circular virtual instruments 101, 102, 103, 104, and 105.

  The water temperature gauge 101 and the oil pressure gauge 105 are the same size. The fuel remaining amount meter 104 and the speed meter 103 are also the same size. These instruments 101, 104, 103, 105 are arranged symmetrically about the engine speed meter 102. The water temperature gauge 101 and the hydraulic pressure gauge 105 are arranged so that the circular display surface is smaller than the remaining gauges 102, 103, and 104, and further from the virtual viewpoint 160 than the remaining gauges 102, 103, and 104. ing. On the other hand, the engine speed meter 102 has a circular display surface larger than the remaining meters 101, 103, 104, and 105, and is closer to the remaining meters 101, 103, 104, and 105 from the virtual viewpoint 160. Has been placed.

  In the present embodiment, when the screen is displayed on the LCD 26, a part of the instrument in the back is not hidden behind the instrument in front of it. However, the whole instrument may be arranged in a compact manner by hiding a part of the instrument behind it in the instrument in front of it.

  The rings 110 of the virtual instruments 101, 102, 103, 104, and 105 have a donut shape in which a columnar member having a square cross section having a front surface, a back surface, an inner peripheral surface, and an outer peripheral surface forms a circle. Moreover, the corner | angular part used as the boundary of each surface has comprised the curved surface which chamfered. In addition, the shape of the ring 110 of the virtual instruments 101, 102, 103, 104, 105 may be other shapes. For example, when viewed from the virtual viewpoint 160 side in a donut shape in which a columnar member having a circular cross section is a circle, The shape may have a curved surface that bulges toward the virtual viewpoint 160.

  As described above, the virtual instruments 101, 102, 103, 104, and 105 are configured as a three-dimensional (three-dimensional), receive virtual light from the virtual light source 150, and have reflective or shadow portions on the surface. It is formed. 4 and 5, the surfaces of the rings 110 of the virtual instruments 101, 102, 103, 104, and 105 are set so that the light is reflected in a metallic manner. In the image displayed on the LCD 26, the ring 110 is displayed. A metallic luster is formed on the surface.

  A virtual ground surface 200 is provided below the virtual instruments 101, 102, 103, 104, and 105. On the virtual ground surface 200, a virtual instrument 101 that receives virtual light from the virtual light source 150 is provided. Shadows 102, 103, 104, and 105 are formed. In the example of FIGS. 4 and 5, among the shadows 201, 202, 203, 204, and 205 of the virtual instruments 101, 102, 103, 104, and 105 on the white virtual ground surface 200, the shadow that fits within the screen of the LCD 26. 201, 202, 203, 204, and 205 are displayed.

  Furthermore, in the present embodiment, the reflection parts (reflected light) and shadow parts on the images of the virtual instruments 101, 102, 103, 104, and 105, and the shadows 201, 202, 203, 204, and 205 on the virtual ground surface 200 The position of the virtual light source 150 is moved in the virtual space 100 so that both positions and luminances change. 4 and 5 show the screen of the LCD 26 when the virtual light source 150 is at a different position, and the shadows of the virtual instruments 101, 102, 103, 104, 105 displayed according to the position of the virtual light source 150 are shown. The positions of 201, 202, 203, 204, and 205 have changed.

  Hereinafter, processing for displaying the virtual instruments 101, 102, 103, 104, and 105 on the screen of the LCD 26 will be described with reference to FIG. The processing procedure in FIG. 3 is programmed and stored in, for example, the ROM 23, and is automatically executed by the CPU 21 and the drawing LSI 24.

  First, in S10, the CPU 21 acquires measurement values of various sensors 30, 31, 32, 33, and 34 of the vehicle.

  Next, in S20, the CPU 21 determines whether or not the measurement value acquired in S10 has changed from the previously acquired measurement value. If the measurement value has changed (S20: YES), the CPU 21 proceeds to S30. If not (S20: NO), the CPU 21 returns to S10 and repeats the same processing until the measurement value changes.

  Next, in S30, the CPU 21 sets the position of the virtual light source 150 (light) in the virtual space 100 according to the measurement value acquired in S10 (virtual light source position setting means). At this time, the position of the virtual light source 150 is also changed by changing the measurement value. For example, when the virtual light source 150 is moved according to the measured value as the vehicle speed (number of rotations), a movement path of the virtual light source is determined in advance in the virtual space 100, and the point on the movement path and the vehicle speed ( The correspondence relationship with the rotation speed) may be set, and the virtual light source 150 may move continuously (smoothly) on the movement path as the vehicle speed (rotation speed) changes continuously. At that time, the virtual light source 150 may move in proportion to the vehicle speed.

  Moreover, it is good also considering a measured value as both a vehicle speed and rotation speed. In that case, a plane in which the virtual light source 150 moves in the virtual space 100 is determined in advance, and coordinate axes (vertical axis and horizontal axis) indicating the vehicle speed and the rotational speed are determined on the moving plane, and the vehicle speed and the rotational speed are determined. As it continuously changes, the virtual light source 150 is continuously (smoothly) moved on the plane.

  The moving range of the virtual light source 150 may be limited to a region closer to the virtual viewpoint 160 than the virtual instruments 101, 102, 103, 104, and 105. In this case, since the virtual instruments 101, 102, 103, 104, and 105 are displayed on the front surface, the virtual instruments 101, 102, 103, 104, and 105 are emphasized. Conversely, the movement range of the virtual light source 150 may be limited to a region farther from the virtual viewpoint 160 than the virtual instruments 101, 102, 103, 104, and 105. In this case, since the shadows 201, 202, 203, 204, and 205 of the virtual instruments 101, 102, 103, 104, and 105 are displayed on the front surface, the positional relationship of the instruments becomes clearer. The calculated virtual light source 150 may be set as a point light source.

  Next, in S40, the drawing LSI 24 sets the virtual instruments 101, 102, 103, 104, 105, the virtual viewpoint 160, and the virtual ground surface 200 at predetermined positions in the virtual space 100 (virtual instrument position setting means and Virtual viewpoint position setting means and virtual ground surface position setting means). Then, the drawing LSI 24 forms a meter image viewed from the set virtual viewpoint 160.

  Of the meter images, the ring 110 is preferably formed as follows by using a shading method (shade method) in the field of computer graphics.

  First, the ring 110 (the side viewed from the virtual viewpoint 160) is divided into a large number of minute polygons in advance. Then, the luminance value in each polygon is calculated from the lighting model of the phone. In the phone lighting model, the luminance of the object surface is the sum of diffuse reflection light, specular reflection light, and ambient light. Diffuse reflected light is proportional to the cosine of the incident angle of light from the light source (therefore, the smaller the incident angle, that is, the closer the perpendicular incidence is, the greater the intensity of the reflected light), and the light is diffused equally in all directions. The specular reflected light is proportional to the cosine of the cosine of the angle between the line-of-sight direction and the regular reflection direction (the direction of the reflection angle that is the same as the incident angle). Therefore, the greater the deviation between the incident angle and the viewing direction angle, the smaller the intensity of the specular reflection light. Ambient light is reflected by air or the like, and has a constant value regardless of the incident direction of light or the angle of the line of sight.

  The image of the scale unit 111 is stored in advance in the ROM 23, for example. In the image of the scale portion 111, both the scale and the number are formed in a three-dimensional manner, and the reflected light and shadow formed by the light from the virtual light source 150 are added to the image. Then, an image of the pointer part 112 whose position is adjusted according to the measurement value is added to the image of the scale part 111. In the present embodiment, the image of the pointer portion 112 is also formed in a three-dimensional manner, and is drawn in a form to which reflected light or shadow formed by light from the virtual light source 150 is added. In this case, since a sense of unity occurs in the shadows of the ring 110, the scale portion 111, and the pointer portion 112, the realism of the meter image is improved.

  As shown in FIGS. 4 and 5, when the image of the pointer part 112 is added, if the pointer part 112 moves below the character of the scale part 111 (the side farther from the virtual viewpoint), There is no problem in visually recognizing characters. The turning angle of the pointer unit 112 is adjusted so as to indicate the correct scale according to the measurement value obtained in S10. The shadow of the pointer portion 112 varies depending on the rotation angle of the pointer portion 112, but the light source may be a fixed light source that is the same as the light source for the scale portion 111, for example.

  Among the formation of meter images, the virtual ground surface 200 and the images of the ring 110 and the shadows 210 and 212 of the pointer portion 112 projected on the virtual ground surface 200 are formed by the shadowing method (attached shadow) in the field of computer graphics. If processing is performed as follows, it is suitable for the present invention pursuing realism.

  First, a shadow area is specified on the virtual ground surface 200 (shadow area specifying means). Specifically, the set ground surface 200 is divided into a number of minute areas, and a viewpoint is placed at the position of the virtual light source 150, and the minute area visible from the viewpoint is hidden by the sun, the ring 110 and the scale 111. Identifies a non-small area as a shadow. Then, the brightness value of each minute area is calculated as a shadow if each of the minute areas is in the shadow area, and as the sun is not in the shadow area. The brightness value of the shadow and the sun may be set as predetermined brightness values, but in this embodiment, the shadow and the sun are set so that the brightness becomes higher as the distance between each minute region and the virtual light source 150 is closer. Luminance values for small areas are set respectively. As a result, the distance to the light source can be recognized based on the shades of the shadows and the shades of the sun. Note that the luminance setting based on the distance to the virtual light source 150 is also applied to the luminance setting of the ring 110 and the pointer unit 112.

  The virtual light source 150 may be set at a position outside the screen of the LCD 26 in the virtual space 100, but may be set at a position displayed on the screen. In the latter case, the virtual light source 150 may be drawn as shown in FIGS. 4 and 5, or the virtual light source 150 may not be drawn as shown in FIGS. By displaying the virtual light source 150 as shown in FIGS. 4 and 5, the positional relationship between the virtual light source 150 and the shadows 201, 202, 203, 204, 205 of the virtual instruments 101, 102, 103, 104, 105 is obtained. The positional relationship among the plurality of virtual instruments 101, 102, 103, 104, 105, particularly the positional relationship in the depth direction, can be clearly recognized. The virtual light source 150 may be drawn as a point light source, but may be drawn as a symbol mark having a predetermined shape as shown in FIGS. 4 and 5, for example.

  The drawing LSI 24 displays, on the graphic memory 25, virtual instruments 101, 102, 103, images obtained by viewing the ring 110, the scale unit 111, the pointer unit 112, the ground surface 200, and the shadows 210 and 212 described above from the virtual viewpoint 160. Are formed for each of 104 and 105 and then combined to form the overall meter image.

  For the image of the ring 110, a more realistic image can be formed by calculating the reflected light for each of the three primary colors (R (red), G (green), and B (blue)) and combining them. . Furthermore, in order to express metallic luster, it becomes more realistic by adding the gloss value corresponding to the metal material assumed as the material of the ring 110 to the value of each color of the diffuse reflected light.

  Finally, in S50, the drawing LSI 24 displays the meter image formed in S40 on the LCD 26. A display example is shown in FIGS. FIG. 4 and FIG. 5 (and FIG. 6 and FIG. 7) are meter images when the position of the virtual light source 150 is different, and it can be confirmed that shadows and reflected light are different. The above is the processing procedure of FIG. The processing procedure of FIG. 3 may be repeatedly executed at a predetermined cycle while the vehicle is in operation (when the ignition is on).

  As mentioned above, although one Example of this invention was described, this is only an illustration to the last, and this invention is not limited to this, Unless it deviates from the meaning of a Claim, it will be knowledge of those skilled in the art. Various modifications such as addition and omission can be made based on this.

  Hereinafter, other examples and modifications of the present invention will be described. It should be noted that the following embodiments can be implemented in combination with the above embodiments as long as no technical contradiction occurs.

  In the above-described embodiment, the shading of the scale unit 111 and the pointer unit 112 is a shadow of the virtual light source 150. For example, the shading unit 111 and the pointer unit 112 are formed of light from a fixed light source positioned obliquely upward as viewed from the virtual viewpoint 160. It may be drawn as a shade.

  Moreover, in the said Example, although the position of the virtual light source 150 was moved according to the measured value, you may move the position of the virtual light source 150 periodically according to progress of time. In this case, a closed movement path (that is, no end point) may be set in advance, and the virtual light source 150 may be moved around the path at a predetermined speed. The virtual light source 150 is positioned above the virtual instruments 101, 102, 103, 104, and 105 in the virtual space 100, and its movement path is shifted from the near side of the virtual instruments 101, 102, 103, 104, and 105 to the back. You may set so that it may become the path | route which moves to the near side, and also from the back | inner side to this side.

  Further, the position of the virtual light source 150 may be moved at random. In this case, for example, the CPU 21 may generate random numbers from time to time, thereby determining the moving direction of the virtual light source 150 at each time point, and repeating the minute movements accordingly.

  In the above example, the virtual instrument is a speedometer, tachometer, water temperature gauge, fuel fuel gauge, and oil pressure gauge. However, in the present invention, it is not limited to these, and it can be changed to another meter installed in a vehicle such as a power meter. Also good.

  In the present invention, there is no limitation on the type (ie, analog type or digital type) or shape of the virtual instrument. In the above example, the analog meter is composed of the arc-shaped scale portion 111 and the rotating pointer portion 112. However, the analog meter may be composed of a linearly arranged scale portion and a pointer portion that moves in parallel. . Moreover, it is good also as a bar graph-shaped meter which does not use a pointer part. Even in such a case, a frame portion may be provided so as to surround the periphery of the meter, and the reflected light and shadow of the frame portion may be formed by a virtual light source that moves in the same manner as the ring 110 in the above example.

  In the above example, an analog meter is used, but a digital meter may be used (or a digital meter may be included among a plurality of meters). In that case, for example, a digital meter may be provided with a frame portion, and the reflected light and shadow of that portion may be formed by a virtual light source that moves in the same manner as the ring 110 in the above example. The numerical display portion of the digital meter may be a three-dimensional figure, and the shadow may be a fixed virtual light source, similar to the scale unit 111.

  In the above description, the frame portion of the meter has a ring shape. However, in the present invention, this shape can be changed without limitation to other shapes such as an ellipse and a polygon (such as a quadrangle). However, in this case as well, it is preferable to include a curved surface on the surface of the frame portion, since the shadow and reflected light by the moving virtual light source can be remarkably changed and the realism can be effectively improved.

  In the above embodiment, the procedure of S30 and the CPU 21 or the drawing LSI 24 constitute a display control unit and setting means. The procedure of S40 and the CPU 21 or the drawing LSI 24 constitute a display control unit and image processing means.

  In the above embodiment, the shadow of the scale part 111 is not drawn. For this reason, the shadow display is simple and easy to see. Further, since the image 212 of the pointer 112 that exists only in the ring 110 is displayed together with the shadow 210 of the ring (frame portion) 110, the position of the virtual light source 150 can be easily grasped. The shadow of the scale unit 111 may be drawn.

1 Vehicle display device 21 CPU
24 Drawing LSI
26 LCD (display unit)
30 Vehicle speed sensor (measuring means)
31 Engine speed sensor (measuring means)
32 Fuel level sensor (measuring means)
33 Water temperature sensor (measuring means)
34 Hydraulic sensor (measuring means)
100 Virtual space 101, 102, 103, 104, 105 Virtual instrument 150 Virtual light source 160 Virtual viewpoint 110 Ring (frame part)
111 Scale part 112 Pointer part 200 Virtual ground surface 201, 202, 203, 204, 205 Virtual instrument shadow 210 Ring (frame part) shadow 212 Pointer part shadow

Claims (4)

A display unit disposed in a vehicle interior of the vehicle, and a display control unit configured to control the display unit to display an image of a virtual three-dimensional instrument that displays a measurement value obtained by a measurement unit equipped in the vehicle. With
The display control unit
Setting means for setting positions of a virtual light source, a virtual viewpoint, and a virtual ground surface in the virtual space;
An image viewed from the virtual viewpoint, the virtual three-dimensional instrument, the virtual ground surface set by the setting unit, and the virtual light emitted from the virtual light source set by the setting unit Image processing means for forming an image in which the shadow of the virtual three-dimensional instrument projected on the virtual ground surface by a typical light is drawn;
A vehicle display device comprising:   The image processing means forms the image in a form in which the virtual three-dimensional instrument receiving virtual light emitted from a virtual light source positioned by the setting means is drawn. The vehicle display device described.   The vehicle according to claim 2, wherein the setting means moves the position of the virtual light source so that reflected light and shadow in the virtual three-dimensional instrument and the shadow projected on the virtual ground surface change. Display device. 4. The vehicle display device according to claim 1, wherein the image processing unit forms the image in a form in which a virtual light source whose position is set by the setting unit is drawn. 5.