JP6958309B2 - Vehicle equipment - Google Patents

Description

The disclosure by this specification relates to vehicle equipment.

Conventionally, as a kind of vehicle device arranged below the windshield, for example, Patent Document 1 discloses a head-up display device for a vehicle (hereinafter, "HUD device"). On the upper surface of the HUD device, a non-reflective wall portion in a posture along the vertical direction of the vehicle and a dust-proof cover in a posture intersecting the non-reflective wall portion are provided. The dustproof cover is formed in a curved shape that curves upward as the distance from the non-reflective wall portion increases. Due to the shape of the anti-vibration cover, substantially all of the external light incident on the vehicle interior through the windshield, which may be visually recognized by the reflection by the dust-proof cover, is incident on the non-reflective wall portion. As a result, the situation where the outside light reflected by the dustproof cover is visually recognized by the viewer is prevented.

Japanese Unexamined Patent Publication No. 2013-32087

By the way, in the HUD device of Patent Document 1, the dustproof cover has a shape that is greatly curved upward so that substantially all of the external light that may be visible due to the reflection by the dustproof cover reaches the non-reflective wall portion. Has been done. Similarly, the non-reflective wall portion has a sufficient height in the vertical direction so that substantially all of the external light that may be visually recognized due to the reflection by the dustproof cover is incident. Based on the above, it is difficult to reduce the vertical dimension of the dustproof cover and the vertical dimension of the non-reflective wall portion, which hinders miniaturization.

An object of the present disclosure is to provide a configuration capable of realizing miniaturization of vehicle equipment such as a HUD device.

In order to achieve the above object, one aspect disclosed is a vehicle device arranged below the windshield (50) in the vehicle (A), in a posture of tilting backward toward the upper side of the vehicle. There is a low-reflection wall surface (31) formed to diffuse or absorb light, and a curved shape that curves upward as the distance from the low-reflection wall surface toward the rear of the vehicle increases, and at least a part of the external light incident through the windshield. Of the curved reflection surface (21) that reflects toward both the low reflection wall surface and the light-shielding portion (56) provided on the lower edge portion of the windshield, and the external light reflected by the curved reflection surface. It is a vehicle device including an external light reaching wall surface (32) formed so as to diffuse or absorb the reflected light further reflected in the reflection region (57) provided with a light-shielding portion.

In this embodiment, the external light incident through the windshield is reflected by the curved reflective surface toward either the low-reflection wall surface or the light-shielding portion of the lower edge portion of the windshield. In this way, if not only the reflection of the external light toward the low-reflection wall surface but also the reflection of the external light toward the light-shielding part of the windshield is allowed, substantially all the external light that may be visible to the vehicle occupants is allowed. , It is not necessary to greatly bend the curved reflective surface so as to reach the low reflective wall surface. Similarly, it is not necessary to secure the height of the low reflection wall surface in the vertical direction so that substantially all the external light that may be visually recognized is incident due to the reflection on the curved reflection surface. Based on the above, it is possible to loosen the curvature of the curved reflection surface to reduce the vertical dimension of the curved reflection surface, and to reduce the vertical dimension of the low reflection wall surface. Therefore, it is possible to reduce the size of vehicle equipment.

The reference numbers in parentheses are merely examples of the correspondence with the specific configuration in the embodiment described later, and do not limit the technical scope at all.

It is a figure which shows typically the positional relationship of an eye box, a virtual image, a HUD device and the like. It is a figure which shows the structure of the windshield. It is sectional drawing which shows the structure of the HUD apparatus by 1st Embodiment. It is sectional drawing which shows the structure of the HUD apparatus by 2nd Embodiment. It is sectional drawing which shows the whole structure of the display system by 3rd Embodiment. It is sectional drawing which shows the structure of the HUD apparatus by 4th Embodiment. It is sectional drawing which shows the structure of the HUD apparatus by 5th Embodiment. It is sectional drawing which shows the structure of the HUD apparatus by 6th Embodiment. It is sectional drawing which shows the structure of the HUD apparatus by the modification 1. FIG. It is a figure which shows typically the lower light-shielding layer by the modification 2. It is a figure which shows the windshield in the modification 3. It is a figure which shows typically the louver film which constitutes the lower light-shielding layer.

Hereinafter, a plurality of embodiments of the present disclosure will be described with reference to the drawings. By assigning the same reference numerals to the corresponding components in each embodiment, duplicate description may be omitted. When only a part of the configuration is described in each embodiment, the configurations of the other embodiments described above can be applied to the other parts of the configuration. Further, not only the combination of the configurations specified in the description of each embodiment but also the configurations of a plurality of embodiments can be partially combined even if the combination is not specified. Further, an unspecified combination of the configurations described in the plurality of embodiments and modifications is also disclosed by the following description.

(First Embodiment)
The HUD device 10 according to the first embodiment of the present disclosure shown in FIG. 1 is a virtual image display device and is one of the vehicle devices mounted on the vehicle A. The HUD device 10 is located below the windshield 50 in the vehicle A and in front of the driver's seat in which the occupant (viewer) on the vehicle A is seated. The HUD device 10 is housed in a storage space provided in, for example, an instrument panel of vehicle A. The HUD device 10 functions as a display device that provides the viewer with various information related to the vehicle A.

The HUD device 10 is a virtual image display device that projects the light of the display light image that is emitted and displayed onto the projection area 58. The projection area 58 is defined in advance in, for example, the windshield 50. The light projected onto the windshield 50 by the HUD device 10 is reflected toward the viewer in the projection area 58 and reaches the eyebox EB predetermined to be located around the viewer's head. A viewer who positions the eye point on the eye box EB can visually recognize the light of the displayed light image as a virtual image 70 superimposed on the foreground.

The eyebox EB is, for example, an area based on the irips whose details are defined in JIS D0021: 1998, and is an area where the eyes of a occupant (viewer) of the vehicle A such as a driver are assumed to be located. Is. In detail. The eye lip is set based on an eye range that statistically represents the distribution of eye positions. As the eye lip, it is preferable to use an eye lip of 90 percentile or more and 99 percentile or less, such as 90th percentile eye lip, 95th percentile eye lip, and 99th percentile eye lip. The eye box EB may be a region including the eye lip or eye range, or may be a region substantially coincide with the eye lip or eye range.

The virtual image 70 presents to the viewer, for example, vehicle state information such as vehicle speed and remaining fuel amount, navigation information for route guidance, and the like. The virtual image 70 is formed in a space of about 10 to 20 meters in front of the vehicle A from the eye point, for example. The virtual image 70 functions as an augmented reality (AR) display by being superimposed on the road surface or the like in appearance of the viewer.

The details of the windshield 50 and the HUD device 10 will be described in order. In the following description, the vertical direction and the front-rear direction are defined with reference to the vehicle A placed on a horizontal surface in a stationary state. That is, the vertical direction is the direction along gravity, and the front-rear direction is the longitudinal direction of the vehicle A and the direction along the horizontal plane.

The windshield 50 shown in FIGS. 1 to 3 is provided in front of the driver's seat (viewer) in the vehicle A. The peripheral edge of the windshield 50 is fixed to the body of the vehicle A by an adhesive or the like. The windshield 50 has a slight curvature that is convex from the inside of the vehicle to the outside of the vehicle, and functions as a concave mirror that forms a distant image of the light of the display light image. The windshield 50 is composed of an outer shield glass 51, an inner shield glass 52, an interlayer film 53, a light shielding layer 55, and the like.

The outer shield glass 51 and the inner shield glass 52 are formed in a rectangular plate shape by substantially colorless and transparent tempered glass. The windshield 50 is a laminated glass formed by laminating an outer shield glass 51 and an inner shield glass 52. An interlayer film 53 and a light-shielding layer 55 are sandwiched between the outer shield glass 51 and the inner shield glass 52.

The interlayer film 53 is formed by stacking a plurality of resin thin films having a shatterproof function, a sound insulation function, a heat insulation function, and the like. The interlayer film 53 is sandwiched between the outer shield glass 51 and the inner shield glass 52 over the entire windshield 50. The interlayer film 53 may have an optical function of increasing the light reflectance of the display light image.

The light-shielding layer 55 is provided between, for example, the interlayer film 53 and the inner shield glass 52. The light-shielding layer 55 is formed by, for example, printing a reflective black ceramic. The light-shielding layer 55 is provided with a predetermined width from the four outer edge portions of the windshield 50 toward the center (see FIG. 2). The widths of the light-shielding layers 55 provided on the four sides of the windshield 50 are defined to be large enough not to obstruct the view of the viewer seated in the driver's seat, and may be different from each other. The light-shielding layer 55 is not formed in the central portion of the windshield 50. The light-shielding layer 55 has a high light-shielding function and reflects external light such as sunlight incident on the windshield 50. In addition, the light-shielding layer 55 hides the adhesive portion of the windshield 50 from the outside of the vehicle.

The reflection region 57 and the projection region 58 described above are defined in advance in the windshield 50. The reflection region 57 is defined as a region of the surface of the windshield 50 on the vehicle interior side that overlaps with the light-shielding layer 55 (hereinafter, “lower light-shielding layer 56”) provided on the lower edge portion of the windshield 50. There is. The reflection region 57 is located above and in front of the HUD device 10. The upper edge of the lower light-shielding layer 56 substantially coincides with the upper edge 56a of the reflection region 57. As described above, the projection area 58 is defined in front of the eye box EB of the viewer and above the reflection area 57. The projection region 58 is defined as a region on the vehicle interior side of the windshield 50 that is different from the region where the light-shielding layer 55 is formed.

The HUD device 10 is one of a plurality of indicators mounted on the vehicle A. The HUD device 10 is electrically connected to the display control device 100. The display of the virtual image 70 by the HUD device 10 is controlled by the display control device 100. The HUD device 10 includes a projector 11, a projection optical system 12, a housing 15, a dustproof sheet 20, an optical trap wall 30, and the like.

The projector 11 cooperates with the projection optical system 12 to project the light of the display light image onto the projection region 58. The projector 11 emits the light of the display light image toward the projection optical system 12. The projector 11 may have a configuration including a liquid crystal panel, a backlight, or the like, or may have a configuration mainly composed of an organic EL panel.

The projection optical system 12 projects the light of the display light image incident from the projector 11 onto the projection region 58. The projection optical system 12 is formed by combining one or more reflectors, lenses, and optical elements such as DOE (Diffractive Optical Element). The projection optical system 12 has, for example, a convex mirror 13 and a concave mirror 14. The convex mirror 13 reflects the light incident from the projector 11 toward the concave mirror 14. The concave mirror 14 further reflects the light reflected by the convex mirror 13 toward the projection area 58. The light of the display light image reflected by the concave mirror 14 reaches the projection area 58 while passing through the dustproof sheet 20. As described above, the virtual image 70 of the display light image is displayed so as to be visible to the viewer.

The housing 15 has an external shape that can be accommodated in an accommodation space secured by an instrument panel or the like. The housing 15 is made of a resin material or a metal material and is formed in a box shape. The projector 11 and the projection optical system 12 are housed in the housing 15. The housing 15 holds the projector 11, the convex mirror 13, and the concave mirror 14, and defines the optical positional relationship between them with high accuracy. A projection opening 16 is formed in the ceiling wall of the housing 15. The projection aperture 16 allows the light of the display light image reflected by the projection optical system 12 to pass through.

The dustproof sheet 20 is formed in a curved thin plate shape by a resin material such as acrylic and polycarbonate, or a translucent material such as glass. The dustproof sheet 20 has a lid shape that closes the entire projection opening 16 of the housing 15, and is fitted into the projection opening 16. The dustproof sheet 20 is fitted into the projection opening 16 to prevent foreign matter (dust, dust, moisture, etc.) from entering the inside of the housing 15. The dustproof sheet 20 has an optical function of transmitting the light of the display light image and an optical function of reflecting the outside light incident on the vehicle interior through the windshield 50.

The dustproof sheet 20 is located behind the light trap wall 30. A curved reflective surface 21 is formed on the outer surface of the dustproof sheet 20 exposed to the outside of the housing 15. The curved reflecting surface 21 is located below the windshield 50 and faces the windshield 50 in the vertical direction. The curved reflecting surface 21 is subjected to an optical coating treatment for increasing the reflectance of light. The curved reflecting surface 21 is formed in a concave shape that is recessed toward the inside of the housing 15.

The dustproof sheet 20 has a curvature only in the front-rear direction of the vehicle A, and does not have a curvature in the lateral direction of the vehicle A. The dustproof sheet 20 is formed with a curve corresponding to a part of a parabola. As a result, the curved reflecting surface 21 is a parabolic curved surface. The curved reflecting surface 21 is curved upward as it is separated from the light trap wall 30 along the front-rear direction of the vehicle A. The trailing edge 23 located at the uppermost position of the curved reflecting surface 21 is provided at a height position equal to that of the upper edge 56a of the lower light-shielding layer 56 or at a height position lower than that of the upper edge 56a. In addition, the trailing edge 23 is located below the body of the instrument panel behind the HUD device 10. Due to such a shape and arrangement, the entire dustproof sheet 20 is invisible to the viewer seated in the driver's seat.

The light trap wall 30 is formed in a plate shape by, for example, a resin material. The optical trap wall 30 is provided as a separate component from the housing 15, and is attached as a bezel to the peripheral edge of the opening of the accommodation space of the instrument panel. The light trap wall 30 is provided at a position facing each front edge of the projection opening 16 and the dustproof sheet 20. The light trap wall 30 extends in a band shape in the lateral direction of the vehicle A along the front edges of the projection opening 16 and the dustproof sheet 20. The light trap wall 30 is formed in an inclined posture with respect to the horizontal plane. The light trap wall 30 is provided in an inclined posture that is inclined to the rear of the vehicle A as it goes upward. The light trap wall 30 has a shape overhanging toward the projection opening 16 and the dustproof sheet 20.

The lower edge 30b, which is located at the frontmost of the light trap walls 30, is located below the entire dustproof sheet 20. On the other hand, the uppermost edge 30a of the light trap wall 30 is located below the trailing edge 23 of the curved reflection surface 21 and the upper edge 56a of the lower light-shielding layer 56. In other words, when the virtual plane 40 is defined so as to include the upper edge 30a of the light trap wall 30 and the trailing edge 23 of the dustproof sheet 20, the upper edge 56a of the lower light-shielding layer 56 is above the virtual plane 40. Is located in.

The optical trap wall 30 is an optical wall for capturing external light. The reflection of light on both plate surfaces of the light trap wall 30 is suppressed very slightly. A first non-reflective surface 31 and a second non-reflective surface 32 are formed on both plate surfaces (both sides) of the optical trap wall 30. The first non-reflective surface 31 and the second non-reflective surface 32 are, for example, finely textured or black-painted or printed. With such a configuration, the first non-reflective surface 31 and the second non-reflective surface 32 can diffuse or absorb most or substantially all of the incident light. The first non-reflective surface 31 is provided on the rear surface (lower surface) of the light trap wall 30. The first non-reflective surface 31 faces the curved reflective surface 21 of the dustproof sheet 20. The second non-reflective surface 32 is provided on the front surface (upper surface) of the light trap wall 30. The second non-reflective surface 32 faces the lower light-shielding layer 56 and is located below the reflective region 57.

With the above configuration, the mechanism for preventing the outside light from becoming stray light will be further described.

The front reflection area 24 and the rear reflection area 25 are defined adjacent to each other on the curved reflection surface 21 of the dustproof sheet 20 in an arrangement arranged in the front-rear direction. The front reflection area 24 is a range of the curved reflection surface 21 near the light trap wall 30, and is defined closer to the first non-reflection surface 31 than the rear reflection area 25. The rear reflection area 25 is a range of the curved reflection surface 21 excluding the front reflection area 24, and is defined behind the front reflection area 24. The area of the rear reflection area 25 is secured wider than the area of the front reflection area 24. When the light trap wall 30 is viewed from the curved reflection surface 21, the front reflection area 24 faces the first non-reflection surface 31, and the rear reflection area 25 is on the back side of the first non-reflection surface 31. It faces the located reflection region 57.

Due to the above positional relationship, the dustproof sheet 20 reflects at least a part of the external light incident on the front reflection region 24 toward the light trap wall 30 so as to reach the first non-reflection surface 31. The external light that has reached the first non-reflective surface 31 due to the reflection of the front reflection region 24 is absorbed or diffused by the first non-reflective surface 31.

The external light that is reflected in the front reflection area 24 and reaches the first non-reflection surface 31 does not have to be all of the external light that enters the front reflection area 24 through the windshield 50. In a configuration without a light trap wall 30 or the like, the front reflection region 24 reflects at least some external light that is expected to reach the eyebox EB when reflected at various places in the vehicle interior. It reflects toward the surface 31. That is, among the external light incident through the windshield 50, some other external light that does not reach the eyebox EB even if reflected in various parts of the vehicle interior is the first non-reflective surface in the front reflection area 24. It may be reflected in a direction deviating from 31.

On the other hand, the dustproof sheet 20 reflects the external light incident on the rear reflection region 25 toward the lower light-shielding layer 56 above the upper edge 30a of the light trap wall 30 so as to reach the reflection region 57. .. The external light reflected in the rear reflection region 25 passes above the first non-reflection surface 31, and in the reflection region 57, the second non-reflection surface is formed by the inner surface of the inner shield glass 52 or the lower light-shielding layer 56. Further reflected towards 32. The external light that has reached the second non-reflective surface 32 due to reflection in the reflection region 57 is absorbed or diffused by the second non-reflective surface 32.

The external light reflected in the rear reflection region 25 and reaching the second non-reflection surface 32 does not have to be all of the external light incident on the front reflection region 24 through the windshield 50. In a configuration without a light trap wall 30 or the like, the rear reflection region 25 is configured to prevent at least a part of external light that is expected to reach the eyebox EB when reflected at various places in the vehicle interior, at least on the lower light-shielding layer. Reflects towards 56. That is, among the external light incident through the windshield 50, some other external light that does not reach the eyebox EB even if reflected in various parts of the vehicle interior is the lower light-shielding layer in the rear reflection region 25. It may be reflected in a direction deviating from 56.

As described above, of the external light reflected by the curved reflecting surface 21, at least a part that may be visually recognized by reaching the eyebox EB is substantially all the first non-reflective surface 31 and the second non-reflective surface 31. It reaches any of the reflective surfaces 32. The reflection of external light by the first non-reflective surface 31 and the second non-reflective surface 32 is negligible or substantially nonexistent. Therefore, the dustproof sheet 20, the light trap wall 30, and the reflection region 57 can prevent the outside light from reaching the eyebox EB.

The curved reflective surface 21 of the first embodiment described so far allows not only reflection of external light toward the first non-reflective surface 31 but also reflection of external light toward the reflection region 57 of the windshield 50. There is. Therefore, among the external light incident through the windshield 50, the curved reflective surface 21 is raised so that substantially all the external light that may cause visual recognition due to the reflection on the curved reflecting surface 21 reaches the first non-reflective surface 31. There is no need to make a large curve in the direction. Similarly, it is not necessary to secure the height of the light trap wall 30 in the vertical direction so that substantially all the external light that may be visually recognized due to the reflection on the curved reflecting surface 21 is incident. According to the above, it is possible to loosen the curvature of the curved reflective surface 21 to reduce the vertical dimension of the curved reflective surface 21 and to reduce the vertical dimension of the first non-reflective surface 31. Therefore, the HUD device 10 can be miniaturized. In addition, in the first embodiment, the reflected light further reflected in the reflection region 57 is diffused or absorbed in the second non-reflection surface 32 as described above. Therefore, even if the curved reflection surface 21 allows the reflection of the external light toward the reflection region 57, the reflected light reflected in the reflection region 57 becomes stray light, reaches the eyebox EB, and is visually recognized by the viewer. The situation that ends up is avoided.

Further, in the first embodiment, the second non-reflective surface 32 is formed on the back surface of the light trap wall 30 forming the first non-reflective surface 31. Therefore, even if the second non-reflective surface 32 is required in addition to the first non-reflective surface 31, the increase in size of the HUD device 10 is unlikely to occur.

Further, in the first embodiment, the upper edge 56a of the lower light-shielding layer 56 is located above the virtual plane 40. With such a positional relationship, the external light reflected by the curved reflecting surface 21 can reach the second non-reflecting surface 32 by reflection in the reflecting region 57. Therefore, the situation where the outside light becomes a stray light is avoided with even higher certainty.

Further, in the first embodiment, even if the light is reflected by the curved reflection surface 21 and then further reflected in various places in the vehicle interior, some other external light that does not reach the eyebox EB is the curved reflection surface. 21 reflects in a direction away from both the curved reflecting surface 21 and the lower light-shielding layer 56. That is, the curved reflecting surface 21 captures the external light that may be visually recognized by the viewer by the light trap wall 30. With such a configuration, the vertical dimensions of the curved reflecting surface 21 and the light trap wall 30 are more likely to be reduced.

In addition, in the first embodiment, the HUD device 10 is configured to allow the curved reflecting surface 21 to reflect external light to the lower light-shielding layer 56. Since the HUD device 10 is a vehicle device that projects light onto the projection area 58, it must be placed below the windshield 50. In addition, since it has a projection optical system 12, it is a vehicle device that is difficult to miniaturize. Therefore, the above configuration, which suppresses the vertical dimensions of the curved reflective surface 21 and the first non-reflective surface 31 to enable miniaturization, is suitable for being applied to the HUD device 10 to reduce the adverse effect of external light. ..

In the first embodiment, the HUD device 10 corresponds to the "vehicle device", the projector 11 and the projection optical system 12 correspond to the "superimposed projection unit", and the trailing edge 23 corresponds to the "upper edge of the curved reflection surface". Corresponds to. In addition, the light trap wall 30 corresponds to the "external light capturing wall", the first non-reflective surface 31 corresponds to the "low reflection wall surface", and the second non-reflective surface 32 corresponds to the "external light reaching wall surface". The lower light-shielding layer 56 corresponds to the "light-shielding portion", and the eyebox EB corresponds to the "assumed area".

(Second Embodiment)
The second embodiment of the present disclosure shown in FIG. 4 is a modification of the first embodiment. In the HUD device 210 of the second embodiment, the shape of the optical trap wall 230 is different from that of the first embodiment. The optical trap wall 230 of the second embodiment is a bezel member formed of a resin material or the like as in the first embodiment, and has a lower trap wall portion 231 and an upper trap wall portion 232. The lower trap wall portion 231 and the upper trap wall portion 232 are each formed in a plate shape extending along the lateral direction of the vehicle A. The lower trap wall portion 231 and the upper trap wall portion 232 are integrally formed, and are continuous with each other at each trailing edge portion.

The lower trap wall portion 231 is provided in an inclined posture that is inclined to the rear of the vehicle A as it goes upward. A first non-reflective surface 31 substantially the same as that of the first embodiment is formed on the rear surface (lower surface) of the lower trap wall portion 231. The first non-reflective surface 31 faces the front reflective region 24 of the curved reflective surface 21 and is in an inclined posture along the reflective region 57.

The upper trap wall portion 232 is provided in an inclined posture slightly inclined upward toward the rear of the vehicle A. Due to the posture of the upper trap wall portion 232, the leading edge 230b located at the front of the light trap wall 230 is located below the upper edge 30a located at the rearmost of the light trap wall 230. .. In addition, the upper edge 30a of the light trap wall 230 is located below the trailing edge 23 of the dustproof sheet 20. When the virtual plane 40 is defined so as to include the upper edge 30a of the light trap wall 230 and the trailing edge 23 of the dustproof sheet 20, the upper edge 56a of the lower light-shielding layer 56 is located above the virtual plane 40.

A second non-reflective surface 32, which is substantially the same as that of the first embodiment, is formed on the upper surface of the upper trap wall portion 232. The second non-reflective surface 32 is provided between the first non-reflective surface 31 and the lower light-shielding layer 56, and faces the reflective region 57 in the vertical direction. The second non-reflective surface 32 is in an inclined posture with respect to the first non-reflective surface 31 and the lower light-shielding layer 56, and is in a slightly downward posture with respect to the horizontal plane.

In the above configuration, the external light incident on the front reflection region 24 of the curved reflection surface 21 is reflected toward the lower trap wall portion 231. Then, the external light that has reached the lower trap wall portion 231 is absorbed or diffused by the first non-reflective surface 31. On the other hand, the external light incident on the rear reflection region 25 of the curved reflection surface 21 is reflected toward the lower light-shielding layer 56 above the light trap wall 230 and passes above the first non-reflection surface 31. Then, the reflection region 57 is reached. The reflected light reflected by the inner surface of the inner shield glass 52 or the lower light-shielding layer 56 in the reflection region 57 reaches the upper trap wall portion 232 and is absorbed or diffused by the second non-reflection surface 32.

In the second embodiment described so far, as in the first embodiment, substantially all of the external light that causes a possibility of visual recognition due to the reflection on the curved reflecting surface 21 is the first non-reflective surface 31 and the second non-reflective surface 32. It reaches one of the above and is suppressed from becoming stray light. By using the first non-reflective surface 31 and the second non-reflective surface 32 together, the curvature of the curved reflective surface 21 is loosened to reduce the vertical dimension of the curved reflective surface 21, and the vertical dimension of the first non-reflective surface 31. Reduction is possible. Therefore, the HUD device 210 can be downsized.

In addition, in the second embodiment, the second non-reflective surface 32 is provided in a posture different from that of the first non-reflective surface 31. As described above, if the postures of the first non-reflective surface 31 and the second non-reflective surface 32 can be individually defined, the second non-reflective surface 32 accurately reflects the reflected light reflected in the reflection region 57. It can be provided at the position and orientation of capture. Therefore, the situation in which the reflected light reflected in the reflection region 57 becomes stray light and is visually recognized by the viewer is further avoided. In the second embodiment, the HUD device 210 corresponds to a "vehicle device".

(Third Embodiment)
The third embodiment of the present disclosure shown in FIG. 5 is another modification of the first embodiment. In the third embodiment, the display system 300 including the main HUD display 310 and the sub HUD display 110 is housed in the storage space in the instrument panel. The virtual image display by the display system 300 is controlled by the display control device 100. The display system 300 displays the AR virtual image 370 and the status virtual image 170 in an image in different spaces. The AR virtual image 370 is imaged above the status virtual image 170 in the appearance of the viewer. The AR virtual image 370 is imaged at a position farther from the windshield 50 than the status virtual image 170.

The main HUD display 310 has substantially the same configuration as the substantially same HUD device 10 (see FIG. 1). The main HUD display 310 includes an AR projector 311 and an AR optical system 312 for displaying an AR virtual image 370. The AR projector 311 and the AR optical system 312 have configurations corresponding to the projector 11 (see FIG. 3) and the projection optical system 12 (see FIG. 3) of the first embodiment, respectively. The AR projector 311 and the AR optical system 312 project the light of the AR virtual image 370 superimposed on the foreground onto the projection area 58 defined by the windshield 50 while passing through the curved reflection surface 21 of the dustproof sheet 20.

The sub HUD display 110 is mounted in front of the vehicle A with respect to the main HUD display 310. The sub HUD display 110 is arranged between the main HUD display 310 and the cowl top member of the vehicle A. The sub-HUD display 110 is arranged below the lower light-shielding layer 56, and is covered above by the lower light-shielding layer 56. The sub HUD display 110 includes a liquid crystal display 111 and a dustproof sheet 120. The liquid crystal display 111 projects the light of the status virtual image 170 from below the lower light-shielding layer 56 toward the region where the lower light-shielding layer 56 is provided by the windshield 50. The light emitted from the liquid crystal display 111 is reflected toward the eyebox EB in substantially the same region as the reflection region 57. The dustproof sheet 120 is formed in a flat plate shape by a resin material such as acrylic and polycarbonate, or a translucent material such as glass.

Also in the third embodiment described so far, the external light reflected by the rear reflection region 25 in the curved reflection surface 21 of the main HUD display 310 is further reflected in the reflection region 57, and the second non-reflection is reflected. It is absorbed or diffused on the surface 32. Therefore, it is possible to loosen the curvature and reduce the vertical dimension of the curved reflective surface 21 and reduce the vertical dimension of the first non-reflective surface 31. Therefore, the size of the main HUD display 310 can be reduced.

In addition, in the third embodiment, the sub-HUD display 110 is arranged below the lower light-shielding layer 56. With such a configuration, irradiation of the dustproof sheet 120 with external light does not substantially occur. Therefore, the dustproof sheet 120 in the sub HUD display 110 can be formed in a flat plate shape. Therefore, the size of the sub-HUD display 110 is further reduced.

In the third embodiment, the display system 300 corresponds to the "vehicle device", the AR projector 311 and the AR optical system 312 correspond to the "first projection unit", and the AR virtual image 370 corresponds to the "first virtual image". Equivalent to. Further, the liquid crystal display 111 corresponds to the "second projection unit", and the status virtual image 170 corresponds to the "second virtual image".

(Fourth Embodiment)
The fourth embodiment of the present disclosure shown in FIG. 6 is still another modification of the first embodiment. The windshield 50 of the fourth embodiment is installed in a posture closer to vertical than that of the first embodiment. In other words, the rearward inclination of the windshield 50 of the fourth embodiment is smaller than that of the first embodiment. Therefore, the upper edge 56a of the lower light-shielding layer 56 is defined at a higher position with respect to the HUD device 410. Corresponding to the posture of the windshield 50, in the fourth embodiment, the shapes and positional relationships of the light trap wall 430 and the dustproof sheet 420 are different from those in the first embodiment.

The light trap wall 430 is provided in a posture along the windshield 50 as in the first embodiment. Therefore, the light trap wall 430 is erected in a posture closer to vertical than that of the first embodiment.

In the curved reflection surface 21 formed on the dustproof sheet 420, the curvature of the rear reflection region 25 is smaller (loose) than that of the first embodiment. That is, the dustproof sheet 420 has a curved shape close to a flat plate as compared with the dustproof sheet 20 (see FIG. 3). As a result, the trailing edge 23 of the dustproof sheet 420 is located at substantially the same height as the upper edge 30a of the light trap wall 430 or below the upper edge 30a. Therefore, the virtual plane 40 defined to include the upper edge 30a of the light trap wall 430 and the trailing edge 23 of the dustproof sheet 420 is in a posture along the horizontal plane or a posture slightly lower than the horizontal plane. Even in such a fourth embodiment, the upper edge 56a of the lower light-shielding layer 56 is located above the virtual plane 40.

As in the fourth embodiment described so far, the curved shape of the dustproof sheet 420 can be appropriately changed according to the posture of the windshield 50. The closer the postures of the windshield 50 and the light trap wall 430 are to the vertical, the closer the dustproof sheet 420 can be to a flat plate. In addition, even if the curvature of the curved reflection surface 21 is made closer to a flat plate shape, the external light reflected in the rear reflection region 25 is further reflected in the reflection region 57 and absorbed or diffused by the second non-reflection surface 32. Will be done. Therefore, also in the fourth embodiment, it is possible to reduce the vertical dimension of the dustproof sheet 420 and reduce the size of the HUD device 410. In the fourth embodiment, the HUD device 410 corresponds to the "vehicle device", and the light trap wall 430 corresponds to the "external light capturing wall".

(Fifth Embodiment)
The fifth embodiment of the present disclosure shown in FIG. 7 is a modification of the second embodiment. The light trap wall 530 of the fifth embodiment is formed in an L-shaped cross section. In the optical trap wall 530, the upper trap wall portion 532 is in an inclined posture slightly inclined downward toward the rear, which is a continuous portion with the lower trap wall portion 231. Therefore, the leading edge 530b located at the front of the light trap wall 530 is located above the trailing edge 530a located at the rearmost of the light trap walls 530.

A second non-reflective surface 32 is provided on the upper surface of the upper trap wall portion 532 so as to be located between the first non-reflective surface 31 and the lower light-shielding layer 56. The angle between the second non-reflective surface 32 and the reflective region 57 is an acute angle slightly smaller than 90 °. The second non-reflective surface 32 faces the reflective region 57 in an oblique orientation, and causes the light reflected in the reflective region 57 to enter, absorb, or diffuse.

Also in the fifth embodiment as described above, similarly to the second embodiment, by using the first non-reflective surface 31 and the second non-reflective surface 32 in combination, the curvature of the curved reflective surface 21 is loosened and the curved reflective surface 21 is moved in the vertical direction. It is possible to reduce the dimensions and reduce the dimensions of the first non-reflective surface 31 in the vertical direction. Therefore, the miniaturization of the HUD device 510 is realized. In the fifth embodiment, the HUD device 510 corresponds to a "vehicle device".

(Sixth Embodiment)
The sixth embodiment of the present disclosure shown in FIG. 8 is another modification of the second embodiment. In the optical trap wall 630 of the sixth embodiment, the lower trap wall portion 631 and the upper trap wall portion 632 are not flat plates but are slightly curved. Therefore, the first non-reflective surface 31 formed on the rear surface of the lower trap wall portion 631 has a curved surface shape that is slightly convex downward and rearward. The second non-reflective surface 32 formed on the upper surface of the upper trap wall portion 632 has a curved surface shape that is slightly convex toward the upper reflective region 57.

As in the sixth embodiment described above, the first non-reflective surface 31 and the second non-reflective surface 32 can absorb or diffuse the reached external light even if they are not flat. Therefore, as in the second embodiment, the first non-reflective surface 31 and the second non-reflective surface 32 are used in combination to loosen the curvature of the curved reflective surface 21 and reduce the vertical dimension of the curved reflective surface 21. The vertical dimension of the non-reflective surface 31 can be reduced. Therefore, the miniaturization of the HUD device 610 is realized. In the sixth embodiment, the HUD device 610 corresponds to the "vehicle device".

(Other embodiments)
Although the plurality of embodiments of the present disclosure have been described above, the present disclosure is not construed as being limited to the above embodiments, and is applied to various embodiments and combinations without departing from the gist of the present disclosure. can do.

In yet another modification 1 of the first embodiment, as shown in FIG. 9, the vertical distance between the windshield 50 and the HUD device 710 is secured to be larger than that of the first embodiment. That is, the upper surface of the HUD device 710 and the instrument panel is provided at a position lower than that of the first embodiment with respect to the windshield 50. As a result, the upper edge 56a of the lower light-shielding layer 56 is defined at a position relatively higher than the HUD device 710.

In the above modification 1, the rear reflection region 25 may allow light to be reflected forward and upward. Therefore, the curvature of the rear reflection region 25 can be relaxed to make the shape of the curved reflection surface 21 closer to a flat surface. According to the above, since the dustproof sheet 20 can be further thinned, the HUD device 710 can be further miniaturized.

In the above embodiment, the light-shielding layer is provided together with the interlayer film between the outer shield glass and the inner shield glass. However, the light-shielding layer may be formed on the outer surface of the windshield, or may be formed on the outer surface of the windshield. Alternatively, the light-shielding layer may be provided between the outer shield glass and the interlayer film, or may be integrally provided in the interlayer film having multiple layers. In addition, a light-shielding layer may be formed by another reflective material instead of black ceramic or the like.

Here, in the windshield 50, the upper edge 56a of the lower light-shielding layer 56 is preferably defined at a low position so as not to block the view. Therefore, the lower light-shielding layer 56 of Modification 2 shown in FIG. 10 is formed by electrochromism. The light transmittance of the lower light-shielding layer 56 is adjusted to a lower value as the amount of outside light around the vehicle increases, for example, based on the detection result of the illuminance sensor 80. As described above, by providing the dimmable lower light-shielding layer 56, the upper edge 56a may be defined upward, and the dustproof sheet may be further thinned. The electrochromic transmittance may be switched by a manual switch.

Further, the lower light-shielding layer 56 of the modification 3 shown in FIGS. 11 and 12 is formed by the louver film 856. The louver film 856 may be provided between the outer shield glass 51 and the inner shield glass 52 as an intermediate layer, or may be attached to the inside of the windshield 50. On the louver film 856, non-transmissive portions 856a in an inclined posture are arranged at a fine pitch. The louver film 856 shields light rays such as sunlight emitted from above. On the other hand, the light rays incident on the windshield 50 from the front can pass through the louver film 856. By adopting such a louver film 856, further thinning of the dustproof sheet may be realized by defining the upper edge 56a upward.

The HUD device of the above embodiment displays a virtual image display image by a liquid crystal projector or an organic EL projector. However, the display light image drawn on the screen by using a laser projector including a laser module and a scanner may be projected onto the projection region by the projection optical system. Further, instead of the laser projector, a projector mainly composed of DLP (Digital Light Processing, registered trademark) may be adopted.

In the third embodiment, the sub HUD display 110 and the main HUD display 310 are separate bodies. However, it may be a HUD device in which the sub HUD display and the main HUD display are integrally configured. That is, a projection unit including an AR projector and an AR optical system and a projection unit mainly composed of a liquid crystal display may be housed in one housing.

In the second embodiment and the like, the lower trap wall portion and the upper trap wall portion are integrally formed. However, the lower trap wall portion and the upper trap wall portion may be provided as separate optical trap walls. Further, the first non-reflective surface and the second non-reflective surface may be appropriately modified as long as they have a non-reflective surface state that does not substantially reflect light.

The curvature of the curved reflection surface of the above embodiment was a shape based on a parabola. However, the curved shape of the curved reflecting surface may be, for example, a cylindrical shape or a free curved surface shape. Further, the entire outer surface of the dustproof sheet does not have to be a curved reflective surface, and the curved reflective surface may be a part of the outer surface of the dustproof sheet. Specifically, an external light reflecting surface that reflects external light so as not to reach the eyebox EB even if it is reflected in various parts of the vehicle interior is provided in the range of the outer surface of the dustproof sheet excluding the curved reflecting surface. It may have been.

In the above embodiment, an example in which the configuration of the curved reflecting surface, the optical trap wall, and the like according to the present disclosure is applied to the HUD device as a vehicle device has been described. However, the above configuration can be appropriately adopted for vehicle equipment other than the HUD device.

A vehicle, EB eyebox (assumed area), 10,210,410,510,610,710 HUD device (vehicle equipment), 300 display system (vehicle equipment), 11 projector (superimposed projection unit), 111 liquid crystal display Instrument (second projection unit), 311 AR projector (first projection unit), 12 projection optical system (superimposed projection unit), 312 AR optical system (first projection unit), 21 curved reflecting surface, 23 trailing edge (upper edge) ), 30, 230, 430, 530, 630 Optical trap wall (external light trapping wall), 31 First non-reflective surface (low reflection wall surface), 32 Second non-reflective surface (external light reaching wall surface), 40 Virtual plane, 50 Windshield, 56 Lower light-shielding layer (light-shielding part), 56a Upper edge, 57 Reflection area, 58 Projection area, 70 Virtual image, 170 Status virtual image (2nd virtual image), 370 AR virtual image (1st virtual image)

Claims (7)

A vehicle device placed below the windshield (50) in the vehicle (A).
A low-reflection wall surface (31) formed to diffuse or absorb light, which is in a posture of inclining backward toward the upper side of the vehicle.
It has a curved shape that curves upward as it moves away from the low-reflection wall surface toward the rear of the vehicle, and at least a part of the external light incident through the windshield is provided on the low-reflection wall surface and the lower edge portion of the windshield. A curved reflective surface (21) that reflects toward both the light-shielding portion (56) and
Of the external light reflected by the curved reflecting surface, the external light reaching wall surface (32) formed so as to diffuse or absorb the reflected light further reflected in the reflecting region (57) provided with the light-shielding portion. ), And vehicle equipment. The vehicle device according to claim 1 , wherein the low reflection wall surface and the external light reaching wall surface are provided on both sides of an external light capturing wall (30, 430) formed in a plate shape. The vehicle device according to claim 1 , wherein the external light reaching wall surface is provided between the low reflection wall surface and the light shielding portion in an inclined posture with respect to the low reflection wall surface. The upper edge (56a) of the light-shielding portion is located above the virtual plane (40) defined to include the upper edge (30a) of the low-reflection wall surface and the upper edge (23) of the curved reflection surface. The vehicle device according to any one of claims 1 to 3. The curved reflecting surface does not reach the assumed region (EB) where the eyes of the passengers of the vehicle are assumed to be located even if the external light incident through the windshield is reflected at various places in the vehicle interior. The vehicle device according to any one of claims 1 to 4 , wherein a part of the external light is reflected in a direction away from both the low reflection wall surface and the light shielding portion. The light of the virtual image (70) superimposed and displayed on the foreground of the vehicle is transmitted through the curved reflection surface toward the projection area (58) defined in the area of the windshield different from the light-shielding portion. The vehicle device according to any one of claims 1 to 5 , which is a virtual image display device further comprising a superimposing projection unit (11, 12) for projecting while projecting. The light of the first virtual image (370) superimposed and displayed on the foreground is transmitted through the curved reflection surface toward the projection area (58) defined in the area different from the light-shielding portion of the windshield. first projecting portion for projecting a (311, 312),
A virtual image display device further comprising a second projection unit (111) that projects the light of the second imaginary image (170) from below the light-shielding portion toward the area where the light-shielding portion is provided by the windshield. The vehicle device according to any one of claims 1 to 5.

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