JP2016212296A - Information display device for cars - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information display device for cars that causes passengers on cars to visually recognize advertisement and information on the operation of the cars.SOLUTION: An information display device for cars 100 of the present invention is an information display for cars 100 that causes viewers to visually recognize a display as a virtual image from the viewers' visual area assumed in advance, the information display device comprising a projector part 83 that projects an image and an intermediate screen 40 that forms the image projected by the projector part 83 into an image, and performing display by reflecting the image formed by the intermediate screen 40 on window parts of the cars.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle information display device that allows a viewer who is a vehicle occupant to visually display a display such as an advertisement as a virtual image.

  Devices have been proposed for advertising using moving bodies that many people see, such as buses and trains.

  For example, in Cited Document 1 (Japanese Patent Application Laid-Open No. 2006-113230), a transmissive screen provided in a window portion of a vehicle and an optical image provided on the transmissive screen provided inside the vehicle are disclosed. An image display system including a projector for displaying an image is disclosed.

Also, in Cited Document 2 (Japanese Patent Application Laid-Open No. 2014-202859), a transmissive screen disposed in a window of a moving body and an optical image having contents corresponding to an advertisement are transmitted from the inside of the moving body to the transmissive type. Projecting on a screen and displaying the advertisement on the transmissive screen, a detecting unit for detecting the moving state of the moving body, and the transmittance of the transmissive screen based on the detected moving state There is disclosed an advertisement display device comprising a control unit that controls the advertisement display device.
JP 2006-113230 A JP 2014-202859 A

  Although the thing of the cited reference 1 and the cited reference 2 can perform an advertisement with respect to the person who exists outside vehicles, such as a bus and a train, there is a problem that it does not provide an advertisement for the person in the car. there were.

  In addition, the use of the transmission type screen has a problem that the transmittance of the window portion is lowered, and the visibility from the inside of the vehicle to the outside of the vehicle and the visibility from the outside of the vehicle to the inside of the vehicle are lowered.

  In addition, the windows of the vehicle must be cleaned because the outside of the vehicle is contaminated by raindrop scales (dust) and dust, and the inside of the vehicle is also contaminated by the contact of the passenger's fingers and head. There was a problem that the maintainability was poor compared to the window part of.

  The present invention is for solving the above-described problems, and the vehicle information display device according to the present invention is mounted on a vehicle, and is displayed to a viewer from a visual region of a viewer assumed in advance. An information display device for a vehicle that visually recognizes an image as a virtual image, comprising: a projector unit that projects an image; and an intermediate screen that forms an image projected by the projector unit, and the image formed on the intermediate screen Is reflected by the window part of the vehicle.

  In the vehicle information display device according to the present invention, the intermediate screen has two main surfaces, a micro lens array including a plurality of micro lenses is provided on one main surface, and the other main surface is smooth. It is a microlens array substrate which is a surface.

  In the vehicle information display device according to the present invention, the intermediate screen has two main surfaces, a micro lens array including a plurality of micro lenses is provided on one main surface, and the other main surface is light. It is a microlens array / light diffusion base material which is a diffusion surface.

  In the vehicle information display device according to the present invention, the intermediate screen has two main surfaces, a micro lens array including a plurality of micro lenses is provided on one main surface, and the other main surface is smooth. A microlens array substrate that is a surface, a light diffusion substrate that has two main surfaces, a light diffusion surface is provided on one main surface, and the other main surface is a smooth surface, The main surface of the lens array substrate on which the microlens array is provided and the main surface of the light diffusion substrate on which the light diffusion surface is provided are arranged to face each other.

  In the vehicle information display apparatus according to the present invention, the projector unit includes a laser light source that generates laser light and a scanning unit that scans the intermediate screen with the laser light.

  In the vehicle information display apparatus according to the present invention, the projector unit includes a light source that generates light and an LCOS element that reflects the light to the intermediate screen.

  In the vehicular information display apparatus according to the present invention, the projector unit includes a light source that generates light and a DMD element that reflects the light to the intermediate screen.

  Since the vehicle information display device according to the present invention causes a viewer who is a vehicle occupant to visually recognize the display as a virtual image, according to the vehicle information display device according to the present invention, the vehicle occupant It is possible to provide advertisements and operation information of the vehicle.

  Further, the vehicle information display device according to the present invention can display a high-intensity virtual image on the vehicle window without applying a screen to the vehicle window with a simple configuration such as a projector unit or an intermediate screen. Therefore, it becomes possible to perform an advertisement without impairing the visibility and maintainability of the window portion.

It is a figure which shows the utilization form of the vehicle information display apparatus 100 which concerns on embodiment of this invention. It is a figure which shows the structure of the vehicle information display apparatus 100 which concerns on embodiment of this invention. 2 is a perspective view of a microlens array substrate 50 used as an intermediate screen 40. FIG. It is the figure which looked at the micro lens array 54 extended in a 1st direction and a 2nd direction from the z-axis direction. It is a figure explaining the definition of a diffusion angle. It is a figure which shows the intermediate screen 40 used for the vehicle information display apparatus 100 which concerns on other embodiment of this invention. It is a figure which shows the intermediate screen 40 used for the vehicle information display apparatus 100 which concerns on other embodiment of this invention. It is a figure which shows the intermediate screen 40 used for the vehicle information display apparatus 100 which concerns on other embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a usage pattern of a vehicle information display device 100 according to an embodiment of the present invention. Moreover, FIG. 2 is a figure which shows the structure of the information display apparatus 100 for vehicles which concerns on embodiment of this invention. Note that the drawings described below are schematic views and may differ from actual shapes, dimensions, and arrangements.

  The vehicle information display device 100 causes a viewer to visually display a display of advertisements, operation information, and the like as a virtual image from a visual region assumed by the viewer. According to such a vehicle information display device 100, the virtual image and the background of the virtual image can be simultaneously viewed. Therefore, the viewer can recognize more information without moving his / her line of sight. Is possible.

  The vehicle information display apparatus 100 includes a projection unit 85 that projects an image, and the projection unit 85 includes an intermediate screen 40 and a projector unit 83. The vehicle window unit 90 displays the display by the projection unit 85 as a virtual image so that the virtual image is superimposed on the front field of view.

  Next, the detail of the projection unit 85 which comprises the vehicle information display apparatus 100 is demonstrated. FIG. 2 shows an example of the structure of the projection unit 85 of the vehicle information display apparatus 100 according to the embodiment of the present invention.

  The coordinates in the projection unit 85 are defined by xyz three-dimensional orthogonal coordinates shown in FIG. For example, the light emitted from the first light source 11 is light emitted in a direction parallel to the z direction. Further, it is assumed that the optical axis of the collimator lens 35 is in a direction parallel to the y direction.

  The projection unit 10 in the projection unit 85 emits light of a projection image displayed by the vehicle information display device 100. The projection unit 10 includes a first light source 11, a second light source 12, a third light source 13, a first dichroic prism 21, a second dichroic prism 22, a condenser lens 26, and the like.

  The first light source 11, the second light source 12, and the third light source 13 emit light having different wavelengths. The first light source 11 emits light of the first wavelength, and the second light source 12 emits the second light. The third wavelength light is emitted from the third light source 13. In the present embodiment, for example, the first wavelength light emitted from the first light source 11 is blue light, the second wavelength light emitted from the second light source 12 is green light, and the third light source. The light of the third wavelength emitted from 13 can be red light.

  As the first light source 11, the second light source 12, and the third light source 13, various laser devices such as a semiconductor laser device (laser light source) that emits laser light as coherent light can be used.

  In the present embodiment, the first wavelength light emitted from the first light source 11 and the second wavelength light emitted from the second light source 12 are incident on different surfaces of the first dichroic prism 21, respectively. The light of the third wavelength emitted from the third light source 13 is disposed so as to enter the second dichroic prism 22.

  In the first dichroic prism 21, the first wavelength light emitted from the first light source 11 is transmitted, and the second wavelength light emitted from the second light source 12 is reflected. Thereby, the light of the first wavelength and the light of the second wavelength are combined.

  The light having the first wavelength and the light having the second wavelength combined in this manner enter the second dichroic prism 22.

  In the second dichroic prism 22, the first wavelength light emitted from the first light source 11 and the second wavelength light emitted from the second light source 12 are transmitted, and the first light emitted from the third light source 13 is transmitted. Light of wavelength 3 is reflected. Thereby, the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength are combined.

  In this way, the first wavelength light, the second wavelength light, and the third wavelength laser light combined by the second dichroic prism 22 are reflected by the projection mirror 30 via the condenser lens 26. , And enters the collimator lens 35. The projection mirror 30 has a function capable of changing the angle two-dimensionally, whereby the incident light can be scanned two-dimensionally, and a projection image by a desired laser beam is formed. The

  The projection mirror 30 further moves along a first axis (not shown) parallel to the x-axis so that the projection mirror 30 can move in the (a) direction, and a second axis (not shown) orthogonal to the first axis. ) About the direction of (b).

  The projection mirror 30 can be appropriately replaced with another optical member as long as it can scan incident light in a two-dimensional manner. As such an optical member, a galvanometer can be used. A mirror, a galvanometer scanner, a polygon mirror, a prism, an acoustooptic device, an optical device using a MEMS (Micro Electro Mechanical System) technology, or the like can be used as appropriate.

The laser light reflected by the projection mirror 30 scans the collimator lens 35 to form a projection image by the desired laser light. In the present embodiment, the point (r ₀ ) where the laser light is incident on the projection mirror 30 and reflected is set so as to exist on the optical axis of the collimator lens 35. The collimator lens 35 collimates the laser light incident from the projection mirror 30 and emits it toward the intermediate screen 40.

  A projected image by the incident laser beam is formed on the intermediate screen 40. The vehicle window 90 displays the image I formed on the intermediate screen 40 by reflecting it. Thereby, it is possible to cause the viewer to visually recognize the display as the virtual image I ′ from the visual region (E) of the viewer assumed in advance. The intermediate screen 40 is an optical member made of a transparent base material having a predetermined transparency or higher. The intermediate screen 40 can be configured by molding using an organic resin material, or can be configured by using an inorganic material such as glass.

  In this embodiment, the microlens array substrate 50 is used as the intermediate screen 40, but other substrates may be used.

  In the present embodiment, an optical system including a collimator lens 35 is disposed between the projection mirror 30 and the intermediate screen 40, but these are not necessarily essential constituent elements. Further, a projection optical system can be appropriately used between the intermediate screen 40 and the vehicle window 90.

  Here, the intermediate screen 40 used in the vehicle information display apparatus 100 according to the present invention will be described in more detail. FIG. 3 is a perspective view of a microlens array substrate 50 used as the intermediate screen 40.

The microlens array substrate 50 has a first main surface 51 and a second main surface 52, and a microlens array 54 in which a plurality of microlenses 53 are periodically arranged on the first main surface 51. And the second main surface 52 is a smooth surface 55. The microlens array substrate 50 is made of a transparent substrate.

  The direction of the axis parallel to the x-axis is defined as the first direction, and the direction of the axis parallel to the y-axis is defined as the second direction (orthogonal relationship with the first direction).

  Here, when the viewer visually views the vehicle window 90, the first direction of the intermediate screen 40 (microlens array substrate 50) is a direction in which an image that is viewed as a horizontal image by the viewer is formed. The second direction of the intermediate screen 40 (microlens array substrate 50) is a direction in which an image viewed as a vertical image by a viewer is formed.

  Under the definitions as described above, the microlens array substrate 50 that is the intermediate screen 40 has a main surface that extends in a first direction and a second direction orthogonal to the first direction.

  FIG. 4 is a view of the microlens array 54 spreading in the first direction and the second direction as seen from the z-axis direction. As shown in the figure, in the intermediate screen 40 (microlens array substrate 50) according to the present embodiment, the microlens 53 is a square having a side length d when viewed from the z-axis direction. Something is used. Note that the microlens 53 may not be square, and may be, for example, a regular hexagon. However, it is preferable that the adjacent microlenses 53 are in close contact with each other, and a smooth surface that does not form a lens does not remain in the gap between the adjacent microlenses 53. This is to reduce the linearly transmitted light.

Each microlens 53 is a spherical lens or an aspherical lens, and has a curvature with a radius of curvature R _{1 in} the first direction and a radius of curvature R _{2 in} the second direction at the apex on the first main surface 51 side. Has a curvature of. The apex means a point where each micro lens 53 protrudes most in the z-axis direction.

Then, the cross-sectional shape of the surface of each microlens 53 that is parallel to the first direction and includes the optical axis of the microlens 53 is a surface that is parallel to the second direction and includes the optical axis of the microlens 53. It is preferable to make it different from the cross-sectional shape in FIG. More specifically, the radius of curvature R ₁ of the first direction in the first principal surface 51 side apex of each microlens 53, it is also possible to equalize the radius of curvature R ₂ of the second direction, varying Is preferred.

In general, the aspect ratio of the image information displayed on the vehicle information display device 100 is different, and the reduction in luminance at the periphery of the image is suppressed between the periphery of the upper and lower ends of the image and the periphery of the left and right ends of the image. in the to the same extent, the radius of curvature R ₁ of the first direction in the first principal surface 51 side apex of each microlens 53, because it is better to the curvature of the second and radial R ₂ are different is there.

Further, in general, taking into account that the image information displayed on the vehicle information display device 100 is horizontally long, the radius of curvature R in the first direction at the apex of each microlens 53 on the first main surface 51 side. ₁ is preferably smaller than the radius of curvature R ₂ in the second direction.

  The vehicle information display device using a laser light source as the light source of the vehicle information display device 100 has an advantage that speckle noise due to laser light is suppressed by using the microlens array 54.

  Next, optical characteristics preferable for the intermediate screen 40 when the intermediate screen 40 (microlens array substrate 50) is used in the vehicle information display device 100 will be described. First, since the diffusion angle is frequently used below, this is defined.

FIG. 5 is a diagram for explaining the definition of the diffusion angle. In this specification, the maximum scattering of light emitted when light substantially parallel to the principal surface normal direction is incident from the microlens array base material 50 and the light diffusion base material 60 constituting the intermediate screen 40. The full width at half maximum (FWHM), which is the difference between the two angles that are half the light intensity I _max , is defined as the diffusion angle θ. The scattered light intensity depends on the Y value of the XYZ color system (CIE 1931 color system) and is measured by a three-dimensional variable angle spectrophotometric system (GCMS-13 type, manufactured by Murakami Color Research Laboratory Co., Ltd.). ing.

Under the above definition, the microlens array substrate 50 has a diffusion angle θ ₁ corresponding to the horizontal direction (first direction) of display by the vehicle information display device 100 and a display by the vehicle information display device 100. It is preferable that there is a relationship of θ ₁ > θ ₂ between the diffusion angle θ ₂ corresponding to the vertical direction (second direction). This is because the image information displayed on the vehicle information display device 100 is horizontally long.

Further, the horizontal diffusion angle θ ₁ is preferably 20 ° or more and 60 ° or less, and the vertical diffusion angle θ ₂ is preferably 5 ° or more and 35 ° or less. More preferably, the horizontal diffusion angle θ ₁ is 20 ° or more and 50 °.
When the vertical diffusion angle θ ₂ is 10 ° or more and 30 ° or less, the intermediate screen 40 used in the vehicle information display device 100 is optimal. This is to realize a high-brightness virtual image display efficiently while suppressing the output of the light source while keeping the brightness of the peripheral portion of the image uniform for a viewer who faces the virtual image. The above range is optimal when the processing accuracy of the array and the design freedom of the virtual image size are allowed.

  Next, the material of the base material that becomes the base of the intermediate screen 40 will be described. The base material used as the base of the intermediate screen 40 may be any transparent material, such as thermoplastic resin, thermosetting resin, UV curable resin, electron beam curable resin, or glass. Can be used.

  If a thermoplastic resin is used as the base material of the intermediate screen 40, for example, polycarbonate resin, acrylic resin, fluorine acrylic resin, silicone acrylic resin, epoxy acrylate resin, polystyrene resin, cycloolefin Examples thereof include polymers, methylstyrene resins, fluorene resins, PET, and polypropylene.

  Further, the intermediate screen 40 is not necessarily formed from one base base material. For example, in the case of the microlens array substrate 50, the microlens array 54 and the like and the substrate-like member may be configured as separate members, and these may be bonded together with an adhesive or the like. However, in this case, it is preferable that all members have the same refractive index.

  Since the vehicle information display device 100 according to the present invention as described above causes a viewer who is a vehicle passenger to visually recognize the display as a virtual image, the vehicle information display device 100 according to the present invention is used. For example, it is possible to provide advertisements and operation information of the vehicle to passengers of the vehicle. Such an effect of the present invention is largely due to the fact that the diffusion angle of the intermediate screen 40 is controlled.

  In addition, the vehicle information display device 100 according to the present invention can display a high-luminance virtual image on the vehicle window portion with a simple configuration such as the projector unit 83 and the intermediate screen 40, so that the advertisement can be displayed at low cost. Can be done.

In the above embodiment, the laser scanning method including the projection unit 10 and the projection mirror 30 has been described as the drawing method of the vehicle information display device 100 based on an example in which the display unit 100 is applied. The display unit 100 according to the invention includes a light source and an LC as a drawing method.
Also applicable to those using an LCOS system using an OS (Liquid crystal on silicon) element, or those using a DLP (Digital Light Processing) system using a light source and a DMD (Digital Mirror Device) element. can do. Examples of the light source include a halogen lamp, a metal halide lamp, an ultrahigh pressure mercury lamp, an LED, and a semiconductor laser.

  In the case of the LCOS method, the light from the light source is selectively reflected by the LCOS element, which is a reflective liquid crystal element, with respect to the intermediate screen 40, and in the case of the DLP method. The DMD element, which is a reflective element in which a plurality of micromirrors are arranged, selectively reflects the light from the light source with respect to the intermediate screen 40, so that the vehicle information display apparatus 100 is Can be realized.

  Next, another embodiment of the present invention will be described. The vehicle information display device 100 according to another embodiment of the present invention is different from the vehicle information display device 100 according to the previous embodiment because the intermediate screen 40 used is different from the vehicle information display device 100 according to the previous embodiment.

  FIG. 6 is a view showing an intermediate screen 40 used in the vehicle information display apparatus 100 according to another embodiment of the present invention. In the present embodiment, a microlens array / light diffusion base material 70 is used as the intermediate screen 40. In addition, the arrow in a figure has shown the light into which the light from the collimator lens 35 injects.

  The microlens array / light diffusing substrate 70 has a first main surface 71 and a second main surface 72, and a plurality of microlenses 73 are periodically arranged on the first main surface 71. A lens array 74 is provided, and the second main surface 72 is a light diffusion surface 75. The microlens array substrate 70 is made of a transparent substrate.

  The light diffusing surface 75 is composed of fine irregularities having a random cycle. Such a light diffusion surface 75 is configured by providing fine scratches on a smooth surface, for example, like ground glass. In order to configure the light diffusion surface 75, blasting such as sand blasting or bead blasting is suitable.

  Even when the microlens array / light diffusion base material 70 as described above is used, the same effects as those of the previous embodiment can be obtained.

  Next, another embodiment of the present invention will be described. The vehicle information display device 100 according to another embodiment of the present invention is also different from the vehicle information display device 100 according to the previous embodiment because the intermediate screen 40 used is different from the vehicle information display device 100 according to the previous embodiment.

  7 and 8 are views showing an intermediate screen 40 used in the vehicle information display apparatus 100 according to another embodiment of the present invention. In the present embodiment, two sheets of the microlens array substrate 50 and the light diffusion substrate 60 described so far are used as the intermediate screen 40. In addition, the arrow in a figure has shown the direction in which the light from the collimator lens 35 injects.

  The light diffusing substrate 60 has a first main surface 61 and a second main surface 62, a light diffusing surface 64 is provided on the first main surface 61, and the second main surface 62 is a smooth surface 65.

The light diffusing surface 64 is composed of fine irregularities having a random period. Such a light diffusing surface 64 is configured by providing fine scratches on a smooth surface like ground glass, for example. In order to configure the light diffusion surface 64, blasting such as sand blasting or bead blasting is suitable.

  In the intermediate screen 40 according to the present invention, the first main surface 51 provided with the microlens array 54 of the microlens array substrate 50 and the first main surface provided with the light diffusion surface 64 of the light diffusion substrate 60. 61 are arranged opposite to each other. Further, the facing distance between the microlens array substrate 50 and the light diffusion substrate 60 is preferably 0 μm or more and 100 μm or less.

  The surface on which the light from the collimator lens 35 is incident may be on the smooth surface 55 side of the microlens array substrate 50 as shown in FIG. 7, or as the smooth surface 65 of the light diffusion substrate 60 as shown in FIG. Also good. However, the former layout can make the brightness of the virtual image more uniform.

  Note that the above-described distance between the opposing surface is the top where the microlens array 54 protrudes most from the main surface of the microlens array substrate 50 and the top where the light diffusion surface 64 protrudes most from the main surface of the light diffusion substrate 60. The interval between.

  In the present embodiment, since an image is formed by the microlens array base material 50 and the light diffusion base material 60 as the intermediate screen 40, light is more effectively used than when a simple screen is used to form an image. Can be transmitted, and the luminance can be increased. In addition, since sufficient luminance can be obtained with a small amount of light, it is possible to save power by suppressing the output of each laser light source and the like.

In addition, as the light-diffusion base material 60, it is preferable that diffusion angle (theta) _D is 5 degrees or more and 6 degrees or less.
When the microlens array substrate 50 and the light diffusion substrate 60 are used in combination like the intermediate screen 40 according to the present embodiment, the anisotropic diffusion property (horizontal direction and vertical direction) of the microlens array substrate 50 is used. It is desirable to combine with a light diffusing substrate 60 having a small diffusion angle (in combination with a light diffusing substrate having a large diffusion angle), in order to maintain a property that the diffusion profile is different). Because the nature of becomes dominant and approaches the isotropic diffusion as a whole). However, since the rainbow pattern caused by diffracted light does not disappear when the diffusion angle of the light diffusion base material 60 is 5 ° or less, in the present invention, the diffusion base material 60 has a diffusion angle θ _D of 5 ° or more and 6 ° or less. The thing is adopted.

  Even when the intermediate screen 40 including the microlens array substrate 50 and the light diffusion substrate 60 as described above is used, the same effects as those of the previous embodiment can be obtained.

  As described above, since the vehicle information display device according to the present invention causes the viewer who is a vehicle occupant to visually recognize the display as a virtual image, according to the vehicle information display device according to the present invention, It is possible to provide advertisements and operation information of the vehicle to the passenger.

  Further, the vehicle information display device according to the present invention can display a high-intensity virtual image on the vehicle window without applying a screen to the vehicle window with a simple configuration such as a projector unit or an intermediate screen. Therefore, it becomes possible to perform an advertisement without impairing the visibility and maintainability of the window portion.

DESCRIPTION OF SYMBOLS 10 ... Projection part 11 ... 1st light source 12 ... 2nd light source 13 ... 3rd light source 21 ... 1st dichroic prism 22 ... 2nd dichroic prism 26 ... condensing lens 30 ... Projection mirror (scanning section)
35 ... Collimator lens 40 ... Intermediate screen 50 ... Micro lens array substrate 51 ... First main surface 52 ... Second main surface 53 ... Micro lens 54 ... Micro lens array 55 ... smooth surface 60 ... light diffusion base material 61 ... first main surface 62 ... second main surface 64 ... light diffusion surface 65 ... smooth surface 70 ... micro lens array / Light diffusing substrate 71 ... first main surface 72 ... second main surface 73 ... micro lens 74 ... micro lens array 75 ... light diffusing surface 83 ... projector portion 85 ... Projection unit 90: Vehicle window (transparent body)
100 ... Information display device for vehicle

Claims (7)

An information display device for a vehicle that is mounted on a vehicle and causes a viewer to visually recognize a display as a virtual image from a visual region of a viewer assumed in advance.
A projector unit for projecting an image;
Vehicle information, comprising: an intermediate screen that forms an image projected by the projector unit, wherein the image formed by the intermediate screen is reflected by a window portion of the vehicle. Display device. The intermediate screen is
2. A microlens array substrate having two main surfaces, wherein a microlens array comprising a plurality of microlenses is provided on one main surface, and the other main surface is a smooth surface. The vehicle information display device described in 1. The intermediate screen is
A microlens array / light diffusing substrate having two main surfaces, a microlens array comprising a plurality of microlenses on one main surface and the other main surface being a light diffusion surface The vehicle information display device according to claim 1. The intermediate screen is
A microlens array substrate having two main surfaces, a microlens array comprising a plurality of microlenses on one main surface, and the other main surface being a smooth surface;
A light diffusing substrate having two main surfaces, wherein one main surface is provided with a light diffusion surface, and the other main surface is a smooth surface;
Consists of
The main surface of the microlens array substrate on which the microlens array is provided and the main surface of the light diffusion substrate on which the light diffusion surface is provided are arranged to face each other. The vehicle information display device described in 1. The projector unit is
A laser light source for generating laser light;
5. The vehicle information display device according to claim 1, further comprising: a scanning unit configured to scan the intermediate screen with the laser light. The projector unit is
A light source that generates light;
The vehicle information display device according to claim 1, further comprising an LCOS element that reflects the light to the intermediate screen. The projector unit is
A light source that generates light;
The vehicle information display device according to any one of claims 1 to 4, further comprising: a DMD element that reflects the light to the intermediate screen.

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