WO2017141896A1

WO2017141896A1 - Head-up display device

Info

Publication number: WO2017141896A1
Application number: PCT/JP2017/005262
Authority: WO
Inventors: 耕平森山; 誠秦; 芽久実佐藤; 毅笠原
Original assignee: 日本精機株式会社
Priority date: 2016-02-19
Filing date: 2017-02-14
Publication date: 2017-08-24

Abstract

To enable a display image having a plurality of display distances to be displayed compactly, inexpensively, and with excellent light efficiency. A HUD device 100 is provided with an imaging position adjustment mirror 31 for varying the imaging distance of and reflecting first and/or second display light L1, L2 of display light L incident on a display unit 21. An image generator 60 is provided with a storage unit 62 for storing a first warping parameter for pre-warping a first image of a display image M and a second warping parameter for pre-warping a second image of the display image M, and pre-warps the first image so as to fit in a first portion M1 on the basis of the first warping parameter and pre-warps the second image so as to fit in a second portion M2 on the basis of the second warping parameter, and generates the display image M.

Description

Head-up display device

The present invention relates to a head-up display device that allows an image projected on a projection member of a vehicle to be visually recognized together with a landscape.

A conventional head-up display device is disclosed in Patent Document 1, for example. Such a head-up display device is composed of first and second displays and a half mirror, and images of different display distances are presented to the user by projecting the transmitted light and the reflected light by the half mirror. (Virtual image) is visually recognized.

Also, since the windshield (projection member) on which the head-up display device projects an image generally has a curved surface, there arises a problem that a virtual image viewed through the windshield is distorted. In order to eliminate such distortion of the virtual image, for example, a warping process as disclosed in Patent Document 2 is performed. In the warping process, a coordinate conversion table (an example of a warping parameter) according to the relative position between the windshield and the user's viewpoint is stored in advance in the memory, and the image is in the direction opposite to the distortion caused by the windshield based on the coordinate conversion table The image distorted in advance and displayed on the display becomes a virtual image without distortion when viewed through the windshield.

Japanese Patent Laid-Open No. 2003-237712 JP 2011-105306 A

However, since the head-up display device described in Patent Document 1 is provided with a plurality of displays, the capacity of the head-up display device may increase or the cost may increase. Moreover, since the half mirror is used, there is a possibility that the utilization efficiency of the display light emitted from the display device may be reduced.

The present invention has been made in view of this problem, and provides a head-up display device capable of displaying a display image having a plurality of display distances that is compact, inexpensive, and light-efficient. It is another object of the present invention to provide a head-up display device that can visually recognize an optimal display image without distortion.

In order to solve the above problems, the head-up display device of the present invention includes an image generation unit that generates a display image including a first image and a second image different from the first image;
A display device having a display element and drawing the display image on the display element and capable of projecting light constituting the drawn display image;
A first screen on which first display light, which is light constituting a first portion drawn in a first region on the display element, of the display image is imaged;
A second screen on which a second display light, which is light constituting a second portion drawn in a second region that is a region different from the first region on the display element, of the display image is formed; With
From the user sitting in the driver's seat of the vehicle, the second portion of the display image formed on the second screen and the virtual image of the first portion of the display image formed on the first screen. A head-up display device in which the first and second display lights are projected onto a projection member of the vehicle so that a virtual image of
An imaging position adjusting mirror that receives light emitted from the display and reflects at least one of the first and second display lights of the incident light and reflects it;
The image generation unit includes a storage unit that stores a first warping parameter for pre-distorting the first image and a second warping parameter for pre-distorting the second image, and the first warping Predistorting the first image to fit in the first portion based on a parameter and predistorting the second image to fit in the second portion based on the second warping parameter Generate images,
It is characterized by that.

In order to solve the above problems, the head-up display device of the present invention includes an image generation unit that generates a display image including a plurality of images,
A display device having a display element and drawing the display image on the display element and capable of projecting light constituting the drawn display image;
A plurality of screens on which a plurality of display lights forming a plurality of portions respectively drawn in a plurality of regions on the display element of the display image are formed; and
Each of the plurality of display lights is such that a virtual image of each of the plurality of portions of the display image formed on each of the plurality of screens is viewed from a user sitting in a driver's seat of the vehicle. A head-up display device projected on a projection member of a vehicle,
An imaging position adjusting mirror that receives light emitted from the display and reflects at least one of the plurality of display lights of the incident light by changing an imaging distance;
The image generation unit includes a storage unit that stores a plurality of warping parameters for pre-distorting each of the plurality of images, and each of the plurality of images is based on each of the plurality of warping parameters. Pre-distorted to fit in each of the parts to generate the display image;
It is characterized by that.

It is possible to provide a head-up display device that can display a display image having a plurality of display distances that is compact, inexpensive, and light-efficient. In addition, it is possible to provide a head-up display device that is free from distortion and can visually recognize an optimal display image.

Schematic which shows embodiment of this invention. The figure which shows the structure of the 1st, 2nd screen of embodiment same as the above. The figure which shows the display element of embodiment same as the above. The figure which shows the 1st, 2nd image conversion table data of embodiment same as the above. The figure which shows the 1st, 2nd virtual image of embodiment same as the above. Schematic which shows the modification of this invention. The figure which shows the modification of the imaging position adjustment mirror of this invention.

Hereinafter, an embodiment of a head-up display device (hereinafter referred to as a HUD device) 100 according to the present invention will be described with reference to the accompanying drawings.
The HUD device 100 is mounted on, for example, an automobile. As shown in FIG. 1, the housing 10, the projection device 20, the screen 30 including the first screen 31 and the second screen 32, the plane mirror 40, and the like. The concave mirror 50 and the image generation unit 60 are provided. The HUD device 100 includes the first portion M1 of the display image M projected by the projection device 20 onto the first screen 31 of the screen 30 and the second display image M projected by the projection device 20 onto the second screen 32 of the screen 30. The portion M2 is reflected by the plane mirror 40 and the concave mirror 50 toward the front windshield (projection member) 200 of the automobile, so that the user E seated in the driver's seat of the automobile (hereinafter also simply referred to as the user E). The first virtual image V1 of the first part M1 and the second virtual image V2 of the second part M2 are displayed.

The housing 10 is made of, for example, black light-shielding synthetic resin, and houses the projection device 20, the screen 30, the plane mirror 40, and the concave mirror 50 inside, and a control board (not shown) on which the image generation unit 60 is mounted outside. Is attached.
The housing 10 has an opening 10a that allows display light L to be described later to pass through the windshield 200, and the opening 10a is covered with a translucent cover 10b.

The projection device 20 emits first display light L1 indicating a first portion M1 described later and second display light L2 indicating a second portion M2 toward a first screen 31 and a second screen 32 described later. The first part M1 and the second part M2 are imaged on the first screen 31 and the second screen 32. The detailed configuration of the projection device 20 will be described in detail later.

As shown in FIG. 1, the screen 30 forms an image of the first portion M1 by receiving the first display light L and forms an image of the second portion M2 by receiving the second display light L2. Specifically, the screen 30 includes a first screen 31, a second screen 32, a screen holder 33 that holds the first and

second screens

31 and 32, and a field lens 34.

The first screen 31 receives the first display light L1 emitted from the projection device 20 on the back surface (surface on the projection device 20 side), and displays the first portion M1 on the surface (surface on the plane mirror 40 side). For example, it is constituted by a holographic diffuser, a microlens array, a diffusion plate or the like. When the first screen 31 displays the first portion M1, the first display light L1 indicating the first portion M1 is projected onto the windshield 200 by the flat mirror 40 and the concave mirror 50 described later, and the direction of the user E by the windshield 200. Reflected by (eye box). Thereby, the user E can visually recognize the 1st virtual image V1 ahead of the windshield 200. FIG. In the present embodiment, as shown in FIG. 2, the first screen 31 has a gate-shaped display area provided with a notch 31a obtained by cutting out a part of a substantially rectangular outer edge portion into a rectangular shape. Therefore, the first virtual image V1 also has a gate-shaped display area. In addition, the 2nd display light L2 mentioned later reaches | attains the 2nd screen 32 mentioned later through the notch part 31a of the 1st screen 31, as shown in FIG.

The second screen 32 is formed in a rectangular shape that is substantially similar to the cutout portion 31a of the first screen 31, receives the second display light L2 emitted from the projection device 20 on the back surface, and has a second portion on the surface. This is a transmissive screen that displays M2, and is configured by, for example, a holographic diffuser, a microlens array, a diffusion plate, and the like, similar to the first screen 31. When the second screen 32 displays the second part M2, the second display light L2 indicating the second part M2 is projected onto the windshield 200 by the plane mirror 40 and the concave mirror 50 described later, and the windshield 200 viewed from the user E is displayed. The second virtual image V2 is displayed in front of.

The screen holder 33 is formed of, for example, black light-shielding synthetic resin, and includes a first tube portion 331 that holds the first screen 31, a second tube portion 332 that holds the second screen 32, and a first tube portion. A wall portion 333 that separates 331 and the second cylindrical portion 332. A field lens 34 is held closer to the projection device 20 than the second screen 32 in the second tube portion 332. The function of the field lens 34 will be described later.

As shown in FIG. 1, the first screen 31 is disposed closer to the projection device 20 than the second screen 32. That is, the optical path length of the first display light L1 traveling from the first screen 31 toward the user E is longer than the optical path length of the second display light L2 traveling from the second screen 32 toward the user E. Therefore, the distance from the user E to the position where the first virtual image V1 is displayed (display distance) is longer than the distance from the user E to the position where the second virtual image V2 is displayed (display distance). The HUD device 100 in the embodiment can display the first virtual image V1 so that it is at a position farther than the second virtual image V2. For example, the display distance of the first virtual image V1 can be 5 m, and the display distance of the second virtual image V2 can be 2 m.

Further, the first screen 31 is arranged to have a predetermined angle (including 0 degrees) with respect to the optical axis of the first display light L <b> 1 from the first screen 31 toward the user E, and the second screen 32. Similarly, they are arranged so as to have a predetermined angle (including 0 degree) with respect to the optical axis of the second display light L2 from the second screen 32 toward the user E. Even when the first and

second screens

31 and 32 have a predetermined angle with respect to the optical axes of the first and second display lights L1 and L2, the user G's forward line of sight due to the free curved surface of the concave mirror 50 described later. In contrast, the first and second virtual images V1 and V2 are formed so as to face each other substantially vertically. When the user E visually recognizes the first and second virtual images V1 and V2, the display distance is constant in any region in the first and second virtual images V1 and V2. The entire second virtual images V1, V2 can be easily viewed.

The flat mirror 40 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin or a glass material by means such as vapor deposition, and the first and second displays emitted from the first and

second screens

31 and 32. The lights L1 and L2 are reflected toward the concave mirror 50.

The concave mirror 50 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin material by means such as vapor deposition, and further reflects the first and second display lights L1 and L2 reflected by the plane mirror 40, It is a mirror having a concave free-form surface that emits toward the windshield 200. The first and second display lights L1 and L2 reflected by the concave mirror 50 pass through the translucent cover 10b provided in the opening 10a of the housing 10 and reach the windshield 200. The first and second display lights L1 and L2 reflected by the windshield 200 form a first virtual image V1 and a second virtual image V2 at the front position of the windshield 200. Thereby, the HUD device 100 can cause the user E to visually recognize both the virtual image V (first and second virtual images V1, V2) and the outside scene actually existing in front of the windshield 200. The concave mirror 50 has a function as a magnifying glass, and magnifies the display image M displayed on the projection device 20 and reflects it to the windshield 200 side. That is, the first and second virtual images V1 and V2 visually recognized by the user E are images in which the first and second portions M1 and M2 displayed by the projection device 20 are enlarged. The concave mirror 50 also has a function of reducing distortion of the first and second virtual images V1 and V2 caused by the windshield 200 being a curved surface. The concave mirror 50 is provided so as to be vertically rotatable by a driving device (not shown) with the axis AX as a rotation axis, and has a function of adjusting the emission direction of the display light L according to the viewpoint position of the user E.

The image generation unit 60 includes a processing unit 61 and a storage unit 62. The processing unit 61 includes, for example, one or more microprocessors, a microcontroller, an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), and any other IC (Integrated Circuit). The storage unit 62 includes, for example, a rewritable RAM (Random Access Memory), a read-only ROM (Read Only Memory), a nonvolatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory / Flash Memory), and the like. Alternatively, one or more memories capable of storing data are included. The image generation unit 60 generates the display image M including the first and second images Ma and Mb, for example, when the processing unit 61 executes a program stored in the storage unit 62. The image generation unit 60 inputs signals (information) from an in-vehicle device, for example, a front information acquisition unit, a vehicle speed detection unit, a navigation device, a fuel detection unit, an ECU, and the like via a CAN (Controller Area Network) bus communication or the like. Thus, information included in the display image M is determined. In the present embodiment, the information included in the display image M includes, for example, vehicle speed, remaining fuel, route guidance information, preceding vehicle enhancement, obstacle enhancement, road shape enhancement, and the like. In addition, the image generation unit 60 is configured so as not to become a distorted virtual image V when viewed by the user E through the first screen 31, the second screen 32, the plane mirror 40, the concave mirror 50, the windshield 200, and the like. The display image M including the first and second images Ma and Mb previously distorted in the opposite direction to the distortion of the virtual image V in consideration of the optical characteristics and arrangement of the optical member is generated (warping process). The display image M generated by the warping process will be described in detail later.

Next, a specific configuration of the projection device 20 will be described.
As shown in FIG. 1, the projection device 20 includes a display 21 that generates and emits first and second display lights L1 and L2, and first and second display lights L1 and L2 that are incident from the display 21. First and second screens that are separated from the projection device 20 by different distances, and a fold mirror 22 that reflects and folds back and an imaging position adjustment mirror 23 that adjusts the imaging distance of light incident from the fold mirror 22. The first and second display lights L1 and L2 are imaged on 31 and 32, respectively.

The display 21 has a display element 211 made of a reflective display element such as DMD (Digital MicroMirror Device) or LCOS (registered trademark: Liquid Crystal On Silicon), or a transmissive display element such as a TFT (Thin Film transistor) liquid crystal panel. It is a projector. The display device 21 draws the display image M input from the image generation unit 60 on the display element 211, and the first and first portions constituting the first and second portions M1 and M2 of the drawn display image M. Two display lights L1 and L2 are emitted toward the fold mirror 22.

The fold mirror 22 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin or a glass material by means such as vapor deposition, and the first and second display lights L1 and L2 emitted from the display 21 are used. Is a plane mirror that reflects to an imaging position adjusting mirror 23 described later. By providing the fold mirror 22, the package of the projection device 20 can be made more compact. A plurality of fold mirrors 22 may be provided between the display 21 and the imaging position adjusting mirror 23, or the fold mirror 22 may be omitted.

The imaging position adjusting mirror 23 is formed by forming a reflective film on the surface of a base material made of, for example, a synthetic resin material or glass material by means such as vapor deposition, and receives the first display light L1 on the same base material. This is a bifocal mirror having a first reflecting surface 231 and a second reflecting surface 232 that receives the second display light L2. In the present embodiment, the first reflecting surface 231 has a flat reflecting surface and reflects the received first display light L1 to the first screen 31 without changing the imaging distance. The first portion M1 is imaged on the surface side. The second reflecting surface 232 is formed as a free-form surface having a convex reflecting surface, and the received second display light L2 is reflected on the second screen 32 by changing the imaging distance to be long, thereby reflecting the second screen 32. The second portion M2 is imaged on the surface side of the lens. The field lens 34 has a function of changing the traveling direction of the second display light L2 reflected so as to spread radially by the second reflecting surface 232 in a narrowing direction. As a result, the second display light L2 is efficiently applied to the second screen 32.

That is, the imaging position adjusting mirror 23 in the present embodiment is different in the curved shape of the first reflecting surface 231 that reflects the first display light L1 and the second reflecting surface 232 that reflects the second display light L2. The imaging distance can be made different between the first display light L1 and the second display light L2 only by receiving the display light L from one display device 21. Accordingly, the first virtual image V1 and the second virtual image V2 visually recognized by the user E can be displayed at different display distances, and the information displayed as the first virtual image V1 and the information displayed as the second virtual image V2 It can be differentiated, and the identifiability of information can be improved. Further, since the imaging distance between at least the first display light L1 and the second display light L2 emitted from the same display 21 can be made different, the cost can be reduced compared with the case where a plurality of displays are provided. Can do.

Further, since the first reflecting surface 231 and the second reflecting surface 232 in the imaging position adjusting mirror 23 are formed on the same base material, the display light L from the display 21 is applied to the imaging position adjusting mirror 23. Since at least the imaging distance between the first display light L1 and the second display light L2 can be made different by only irradiating, space saving can be realized without complicating the optical path of the display light L.

Further, the imaging position adjusting mirror 23 in the present embodiment includes a first reflecting surface 231 and a second reflecting surface 232 that make the imaging distances of the first display light L1 and the second display light L2 different on the same substrate. Therefore, the relative positions of the first reflecting surface 231 and the second reflecting surface 232 are not easily shifted due to an assembly error or the like, and the first display light L1 and the second display light L2 are accurately transmitted to the first screen. 31 and the second screen 32 can be imaged.

In addition, since a part of the imaging position adjustment mirror 23 (first reflection surface 231) in the present embodiment is formed as a flat surface, the display light L projected from the display 21 can be reflected without being distorted. . In addition, the design and manufacturing of the imaging position adjusting mirror 23 is facilitated, and the design manufacturing cost can be reduced.

Next, the display image M generated by the image generation unit 60 and the warping process will be described. FIG. 3A shows a state in which a display image M (hereinafter also referred to as the original display image M) generated without performing the warping process is drawn on the display element 211, and FIG. A display image M generated by performing the process (hereinafter also referred to as a warped display image M) is depicted on the display element 211.
As shown in FIG. 4A, the original display image M includes a first image Ma, a second image Mb, and a background image Mc serving as a background portion of the first image Ma and the second image Mb. Have. The first and second images Ma and Mb include elements constituting information such as characters and graphics. The background image Mc is a dark color image such as black or gray and does not include elements constituting information. Of the display image M, the first part M1 is a first reflecting surface 231 of the fold mirror 22 and the imaging position adjusting mirror 23 in which a part of the display light L constituting the drawn display image M is displayed on the display element 211. This is a portion drawn in the first area 211a projected onto the first screen 31 via the. The original display image M includes the first image Ma and a part of the background image Mc in the first portion M1. That is, the first image Ma is drawn on the first region 211a of the display element 211, so that the first display light L1 constituting the first image Ma forms an image on the first screen 31 (the first screen 31 has a first image). The first image Ma is displayed as one part M1). The second portion M2 of the display image M is such that a part of the display light L that constitutes the drawn display image M on the display element 211 passes through the second reflecting surface 232 of the fold mirror 22 and the imaging position adjustment mirror 23. This is a portion drawn in the second area 211b projected onto the second screen 32 through the second screen. The original display image M includes the second image Mb and a part of the background image Mc in the second portion M2. That is, the second image Mb is drawn on the second region 211b of the display element 211, so that the second display light L2 constituting the second image Mb is imaged on the second screen 32 (the second screen 32 has the second image Mb). The second image Mb is displayed as the two portions M2.) In the display image M, the third portion M3 is a portion drawn on the third region 211c which is a boundary region between the first region 211a and the second region 211b on the display element 211. The third region 211c on the display element 211 has a first reflecting surface 231 and a second reflecting surface of the imaging position adjusting mirror 23 in which a part of the display light L constituting the drawn display image M is passed through the fold mirror 22. A portion of the display light L projected onto the portion including the boundary portion 233 with respect to H.232 and reflected by the imaging position adjusting mirror 23 is the screen holder 33 that is the boundary between the first screen 31 and the second screen 32. This is an area projected on the wall 333. Here, the original first image Ma is a gate-shaped image having a rectangular cutout at the bottom, and the original second image Mb is a rectangular image. When these original first and second images Ma and Mb are drawn on the display element 211, first and second virtual images V1 and V2 (first and second images) visually recognized by the user E through the windshield 200. A virtual image of Ma and Mb) is a distorted image due to the windshield 200 being a curved surface or the like.

Therefore, the image generation unit 60 generates a display image M by performing a warping process as follows.
The storage unit 62 of the image generation unit 60 stores first image conversion table data D1 and second image conversion table data D2 shown in FIG. The first image conversion table data D1 is data in which a plurality of first warping parameters are associated with a plurality of viewpoint positions of the user E. The first warping parameter is data for determining the coordinates on the display element 211 of a plurality (f (f is a positive integer)) reference grid points P11 to P1f of the first image Ma. . The coordinates of the reference grid points P11 to P1f are set so as to be within the first region 211a on the display element 211. The second image conversion table data D2 is data in which a plurality of second warping parameters are associated with a plurality of viewpoint positions of the user E. The second warping parameter is data for determining the coordinates on the display element 211 of a plurality (f in this embodiment) of reference grid points P21 to P2f in the second image Mb. The coordinates of the reference grid points P21 to P2f are set so as to be within the second region 211b on the display element 211.
The processing unit 61 of the image generation unit 60 first determines the viewpoint position of the user E based on coordinates calculated based on a captured image obtained by capturing the face part (including eyes) of the user E and the rotation angle of the concave mirror 50. . Next, the processing unit 61 transforms and predistorts the first image Ma based on the first warping parameter corresponding to the determined viewpoint position of the user E, and also corresponds to the determined viewpoint position of the user E. Based on the second warping parameter, the second image Mb is converted and distorted in advance. At this time, for the coordinates of pixels other than the pixels associated with the reference grid points P11 to P1f and P21 to P2f in the first and second images Ma and Mb, linear interpolation, polynomial interpolation, spline interpolation, or two-dimensional height It can be appropriately determined by a known method such as second-order polynomial interpolation. At this time, the coordinates of each pixel are determined so that the converted first image Ma and second image Mb fit in the first region 211a and the second region 211b on the display element 211, respectively. Then, the processing unit 61 combines the warped first image Ma and the warped second image Mb, and generates a warped display image M using the background portion (background image Mc) as a dark color image.

As shown in FIG. 3B, in the display image M after warping, the first image Ma after warping is drawn in the first region 211a on the display element 211 within the first portion M1, and The first virtual image V1 is previously distorted in a direction opposite to the direction in which the first virtual image V1 is distorted. The warped second image Mb is drawn in the second region 211b on the display element 211 within the second portion M2, and is distorted in advance in a direction opposite to the direction in which the second virtual image V2 is distorted. Yes. When the warped first and second images Ma and Mb are drawn on the display element 211, as shown in FIG. 5, the first and second virtual images V1 and V1 visually recognized by the user E through the windshield 200 are displayed. V2 is distorted when the first and second images Ma and Mb are reflected by the windshield 200. As a result, there is no distortion similar to the first and second images Ma and Mb even when the distortion is canceled. Become a statue. Specifically, the first virtual image V1 is visually recognized as a portal image similar to the original first image Ma, and the second virtual image V2 is visually recognized as a rectangular image similar to the original second image M2. The Further, since the background image Mc included in the first and second portions M1 and M2 and the third portion M3 is a dark color image, display light is emitted from the area on the display element 211 where the background image Mc is drawn. L is hardly projected (including the case where it is not projected at all. The same applies hereinafter). Accordingly, the display image M is generated so that the background Mc is included in the third portion M3, so that the boundary portion 233 of the imaging position adjusting mirror 23 and the wall portion 333 of the screen holder 33 are formed from the third region 211c. The display light L is hardly projected. In the above description, the original first image Ma and the second image Mb are included in the first part M1 and the second part M2 of the original display image M, respectively. The coordinates of the original first image Ma and / or the second image Mb, if the image Ma and the second image Mb are within the first part M1 and the second part M2 of the display image M after warping, respectively. May be set outside the first portion M1 and / or outside the second portion M2.

That is, in the HUD device 100 according to the present embodiment, the image generation unit 60 uses the first warping parameter for predistorting the first image Ma of the display image M and the second image Mb of the display image M. A first portion M1 that includes a storage unit 62 that stores a second warping parameter for pre-distortion, and that draws the first image Ma in the first region 211a on the display element 211 based on the first warping parameter. And the second image Mb is distorted in advance so as to fit in the second portion M2 drawn in the second region 211b on the display element 211 based on the second warping parameter, and the display image M is generated.
According to this, since the first image Ma and the second image Mb after warping are drawn in the first area 211a and the second area 211b on the display element 211, respectively, the display image M is based on a single warping parameter. The warped first image Ma is drawn in the second area 211b, or the warped second image Mb is drawn in the first area 211a, and the first part M1 The image does not interfere with the second portion M2, and the user E can visually recognize the optimal first and second virtual images V1, V2 that are not distorted and that there is no image missing or interference.

In the HUD device 100 according to the present embodiment, the image generation unit 60 is a boundary region between the first region 211a and the second region 211b on the display element 211 in the display image M drawn by the display 21. The display image M is generated so that the third portion M3 drawn in the three regions 211c is a dark color image.
According to this, it can suppress that the display light L reflects in the boundary part 233 and / or the wall part 333, and stray light arises. In addition, the first image Ma and / or the second image Mb is not blocked by the boundary (wall portion 333) between the first screen 31 and the second screen 32, and the user E can obtain the optimal first and The second virtual images V1 and V2 can be visually recognized.

The above is the description of the HUD device 100 in the present embodiment, but the present invention is not limited to the embodiment and the drawings. Of course, changes (including deletion of components) can be added to these. An example of a modification is shown below.

In the above embodiment, the first reflecting surface 231 is a flat surface and the second reflecting surface 232 is a convex free-form surface. However, the shapes of the reflecting surfaces of the first reflecting surface 231 and the second reflecting surface 232 are as follows. Since the imaging distances of the first display light L1 and the first display light L2 may be different from each other, the present invention is not limited to this. The imaging distance can be increased by making the reflecting surface convex, while the imaging distance can be shortened by making it concave. In addition, the 1st reflective surface 231 and the 2nd reflective surface 232 do not need to have the same curved surface shape in the whole reflective area | region, and may differ with a reflective area | region.

In the above embodiment, the first screen 31 is arranged to have a predetermined angle with respect to the optical axis of the first display light L1 from the first screen 31 toward the user E, and the second screen 32 is also the same. Although it has been arranged to have a predetermined angle with respect to the optical axis of the second display light L2 from the second screen 32 toward the user E, it is not limited to this. The first screen 31 and / or the second screen 32 may be disposed so as to be inclined at a predetermined angle or more with respect to the optical axis of the first display light L1 (second display light L2) toward the user E. Specifically, as shown in FIG. 6, the first screen 31 is disposed at a predetermined angle or more with respect to the optical axis of the first display light L <b> 1, and the first screen 31 and the display device 21 disposed at a tilt are arranged. In consideration of the optical path length of the first display light L1 between them, the imaging distance of the first display light L1 can be gradually changed by gradually changing the curved surface shape of the first reflecting surface 231. Accordingly, even when the first screen 31 is tilted by a predetermined angle or more with respect to the optical axis, the first portion M1 can be imaged in a wide range (including the entire area) of the first screen 31, and the depth from the user E can be increased. The 1st virtual image V1 which has a feeling and is not blurred can be visually recognized.

Further, the inclination of the first screen 30 with respect to the optical axis of the first display light L1 may be different from the inclination of the second screen 32 with respect to the optical axis of the second display light L2. With such a configuration, the two virtual images (the first virtual image V1 and the second virtual image V2) can be differentiated in a three-dimensional manner, and each information can be distinguished and easily recognized by the user E.

In the above embodiment, the image forming position adjusting mirror 23 for adjusting the image forming distance of the first display light L1 and / or the second display light L2 emitted from the display device 21 has a plurality of connections as shown in FIG. You may comprise by the image position adjustment mirror 23a and the image formation position adjustment mirror 23b.

Moreover, in the said embodiment, although the 1st reflective surface 231 and the 2nd reflective surface 232 were arrange | positioned on the same base material, you may each arrange | position on a separate base material.

Further, the first reflecting surface 231 and the second reflecting surface 232 may be formed of a continuous reflecting film, and the reflecting film is formed near the boundary portion 233 between the first reflecting surface 231 and the second reflecting surface 232. It does not have to be.

Moreover, in the said embodiment, although the 1st screen 31 and the 2nd screen 32 were made into the substantially rectangular shape, even if the shape of the 1st screen 31 and the 2nd screen 32 is polygonal shapes, such as a hexagon and an octagon, Good.

In the above embodiment, the image generation unit 60 is mounted on the control board attached to the housing 10, but is not limited thereto. For example, part or all of the image generation unit 60 may be provided on the vehicle side, and a control unit on the vehicle side (for example, a control unit of a combination meter) may function as part or all of the image generation unit 60. .

In addition, the present invention includes an image generation unit that generates a display image including three or more images, and a display element. The display image is drawn on the display element, and the drawn display image is displayed. A display capable of projecting the constituent light, and three or more display lights constituting three or more portions respectively drawn in three or more regions on the display element of the display image are imaged. Three or more screens, and a virtual image of each of the three or more portions of the display image formed on each of the three or more screens from a user sitting in the driver's seat of the vehicle. As may be visually recognized, each of the three or more display lights may be used in a head-up display device that projects onto a projection member of the vehicle.
The head-up display device includes an imaging position adjusting mirror that receives light emitted from the display and reflects the incident light by changing an imaging distance of at least one of the three or more display lights. The image generation unit includes a storage unit that stores three or more warping parameters for pre-distorting each of the three or more images, and the three or more warping parameters are based on each of the three or more warping parameters. Each of the two or more images is pre-distorted to fit in each of the three or more portions to generate the display image. That is, the image generation unit distorts the three or more images in advance so that each of the display images fits in a portion to be rendered by using a dedicated warping parameter, and the display image Is generated.

In addition, the image generation unit may display the display image so that a portion of the display image drawn by the display device is drawn in a boundary region between the three or more regions on the display element is a dark color image. Is generated.

Also, in the above description, in order to facilitate understanding of the present invention, explanations of known technical matters that are not important are omitted as appropriate.

The present invention can be applied to a head-up display device that allows an image projected on a projection member of a vehicle to be visually recognized together with a landscape.

100 HUD device (head-up display device), 10 housing, 20 projection device, 21 display, 211 display element, 211a first region, 211b second region, 211c third region, 22 fold mirror, 23 imaging position adjustment Mirror, 30 screen, 31 first screen, 32 second screen, 40 plane mirror, 50 concave mirror, 60 image generation unit, 61 processing unit, 62 storage unit, L display light, L1 first display light, L2 second display light, M display image, M1 first part, M2 second part, M3 third part, Ma first image, Mb second image, Mc background image, V virtual image, V1 first virtual image, V2 second virtual image

Claims

An image generation unit that generates a display image including a first image and a second image different from the first image;
A display device having a display element and drawing the display image on the display element and capable of projecting light constituting the drawn display image;
A first screen on which first display light, which is light constituting a first portion drawn in a first region on the display element, of the display image is imaged;
A second screen on which a second display light, which is light constituting a second portion drawn in a second region that is a region different from the first region on the display element, of the display image is formed; With
From the user sitting in the driver's seat of the vehicle, the second portion of the display image formed on the second screen and the virtual image of the first portion of the display image formed on the first screen. A head-up display device in which the first and second display lights are projected onto a projection member of the vehicle so that a virtual image of
An imaging position adjusting mirror that receives light emitted from the display and reflects at least one of the first and second display lights of the incident light and reflects it;
The image generation unit includes a storage unit that stores a first warping parameter for pre-distorting the first image and a second warping parameter for pre-distorting the second image, and the first warping Predistorting the first image to fit in the first portion based on a parameter and predistorting the second image to fit in the second portion based on the second warping parameter Generate images,
A head-up display device.
In the image generation unit, a third portion drawn in a third region that is a boundary region between the first region and the second region on the display element in the display image drawn by the display unit is a dark color image. The display image is generated so that
The head-up display device according to claim 1.
An image generation unit for generating a display image including a plurality of images;
A display device having a display element and drawing the display image on the display element and capable of projecting light constituting the drawn display image;
A plurality of screens on which a plurality of display lights forming a plurality of portions respectively drawn in a plurality of regions on the display element of the display image are formed; and
Each of the plurality of display lights is such that a virtual image of each of the plurality of portions of the display image formed on each of the plurality of screens is viewed from a user sitting in a driver's seat of the vehicle. A head-up display device projected on a projection member of a vehicle,
An imaging position adjusting mirror that receives light emitted from the display and reflects at least one of the plurality of display lights of the incident light by changing an imaging distance;
The image generation unit includes a storage unit that stores a plurality of warping parameters for pre-distorting each of the plurality of images, and each of the plurality of images is based on each of the plurality of warping parameters. Pre-distorted to fit in each of the parts to generate the display image;
A head-up display device.
The image generation unit generates the display image so that a portion of the display image drawn by the display device is a dark color image drawn in a boundary region between the plurality of regions on the display element.
The head-up display device according to claim 3.