JP2011209457A - Method for manufacturing head-up display apparatus and virtual image adjustment device suitable for use for the manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a head-up display device, which can efficiently adjust a display state of a virtual image, and can suppress degradation in the efficiency of the manufacture of the head-up display apparatus, and to provide a virtual image adjustment device suitable for use for the manufacturing method.SOLUTION: In an imaging step, the virtual image 22 and normal reference point 24a for an inspection image 32 are photographed. In a displacement detection step, a displacement between the normal reference point 24a, when the relative positional relation between the inspection image 32 and the optical axis 16 of an enlarging mirror 14 is normal, and the photographing reference point 22b of the virtual image 22 for the inspection image 32, obtained from a photographed image, is detected. In a relative position adjustment step, the relative position between the inspection image 32 and the optical axis 16 of the enlarging mirror 14 is adjusted so as to correct the detected displacement.

Description

  The present invention relates to a method for manufacturing a head-up display device provided in a moving body such as a vehicle, and a virtual image adjusting device suitable for use in the manufacturing method.

  A head-up display device (hereinafter, referred to as “head-up display device”) that includes an image output device that outputs an image and an optical system that projects the image onto a windshield of the vehicle, (Referred to as HUD device).

  Patent Document 1 discloses a HUD device that has a reflector that transmits and reflects light and an image output device that outputs an image toward the reflector, and displays a virtual image of the image reflected by the reflector in a vehicle. Has been.

  This HUD device has a change mechanism for changing the position of the image output device. Due to an assembly error when the device is assembled to an instrument panel, a manufacturing error of an instrument panel (hereinafter referred to as an instrument panel), etc. In response to the problem that the virtual image is displayed tilted with respect to the surface of the instrument panel, the position of the image output device is changed by the change mechanism instead of adjusting the position of the device with respect to the instrument panel, and the inclination of the virtual image is adjusted. is doing.

Japanese Patent No. 4336245

  By the way, in the inner space of the instrument panel where the HUD device is installed, a combination meter for displaying vehicle information, an air conditioner for controlling the air conditioning in the passenger compartment, and the like are installed. For this reason, it is very difficult to secure a space for installing the HUD device.

  One of the methods for realizing miniaturization of the HUD device is, for example, a method of increasing the enlargement ratio of an optical system having an enlargement function. By increasing the magnification of the optical system, the optical path length between the optical system and the image output device can be shortened, and the size of the image output device can be further reduced. As a result, the HUD device can be reduced in size.

  However, if the enlargement ratio of the optical system is increased and the relative distance between the optical system and the image output device is shortened, the virtual image becomes larger with respect to the deviation of the relative positional relationship between the image of the image output device and the optical axis of the optical system. It will be distorted. This tendency becomes more prominent as the enlargement ratio of the optical system is increased. Therefore, it is very important to improve the accuracy of the relative positional relationship between the image output by the image output device and the optical axis of the optical system.

  The image output device and the optical system are to be installed at regular positions in the housing of the HUD device. However, the image output to the optical system is caused by the dimensional error of the housing and the assembling error generated when the parts are assembled. The position of is deviated from the normal case. In a state before the enlargement ratio of the optical system was increased, the distortion of the virtual image due to the dimensional error or assembly error of the housing did not affect the display quality.

  However, if the enlargement ratio of the optical system is increased for the purpose of reducing the size of the HUD device, the distortion of the virtual image due to the dimensional error or the assembly error becomes larger than that before the enlargement ratio is increased. It has a great influence on display quality. For this reason, in manufacturing the HUD device, a process of adjusting the display state of the virtual image by changing the relative position between the image of the image output device and the optical axis of the optical system is essential.

  The HUD device of Patent Document 1 is provided with a change mechanism that changes the position of the image output device as described above, and can adjust the display state of the virtual image. However, although this HUD device has a change mechanism, when adjusting the display state of the virtual image, the operator must perform adjustment work while comparing the virtual image displayed on the reflector with the surface of the instrument panel. For this reason, since it greatly affects the skill level of the operator, the adjustment work may take an enormous amount of time in some cases. If this adjustment work step is incorporated in a part of the manufacturing process of the HUD device, the manufacturing efficiency of the HUD device is lowered.

  The present invention has been made in view of the above-described problems, and is a head-up display device capable of efficiently adjusting the display state of a virtual image and suppressing a decrease in manufacturing efficiency of the head-up display device. A manufacturing method and a virtual image adjusting apparatus suitable for use in the manufacturing method are provided.

The invention according to claim 1 of the present invention includes an image output device for outputting an image, and an optical system for enlarging the image and projecting the image onto a windshield of the vehicle, and projecting the enlarged image onto the windshield. According to the method for manufacturing a head-up display device that displays a virtual image of an image in the vehicle,
As a reference point preset at a specific position in the virtual image of the inspection image that is a still image output from the image output device, a normal reference point when the relative positional relationship between the inspection image and the optical axis of the optical system is normal is used. A reference point displaying step for displaying on the projection side of the inspection image of the optical system;
An imaging process for capturing a virtual image of the inspection image together with a normal reference point;
A misregistration detection step of extracting a reference point of a virtual image of an inspection image as a photographing reference point from a photographed image photographed in the photographing step, and detecting a misalignment between the normal reference point and the photographing reference point;
And a relative position adjusting step for adjusting the relative position between the inspection image and the optical axis of the optical system so as to correct the positional deviation.

According to a second aspect of the present invention, there is provided an image output device for outputting an image, and an optical system for enlarging the image and projecting the image onto a windshield of the vehicle. In a method for manufacturing a head-up display device that displays a virtual image of an image in a vehicle by projection of
Normal reference point when the relative positional relationship between the inspection image and the optical axis of the optical system is normal as a reference point preset at a specific position in the virtual image of the inspection image that is a still image output from the image output device A storage step for storing the position information of
An imaging process for capturing a virtual image of the inspection image;
The virtual image reference point of the inspection image is extracted as a shooting reference point from the shot image taken in the imaging step, and the positional deviation between the normal reference point specified from the position information of the normal reference point and the shooting reference point is detected. A displacement detection process to detect;
And a relative position adjusting step for adjusting the relative position between the inspection image and the optical axis of the optical system so as to correct the positional deviation.

  In the first aspect of the present invention, the positional deviation between the photographing reference point extracted from the photographed image photographed in the imaging step and the normal reference point is detected in the positional deviation detection step. Further, in the invention according to claim 2, the characteristic is obtained from the position information of the photographing reference point extracted from the photographed image photographed in the photographing step and the normal reference point stored in the storing step in the positional deviation detecting step. The positional deviation from the regular reference point is detected.

  In any of the claims, the relative position between the inspection image and the optical axis of the optical system is adjusted so that the detected positional deviation is corrected in the relative position adjustment step. By the adjustment in the relative position adjustment step, the positional relationship between the inspection image and the optical axis of the optical system approaches a normal positional relationship, so that a virtual image with reduced distortion can be easily obtained.

  According to the first and second aspects of the present invention described above, the inspection image and the light of the optical system are so corrected that the positional shift obtained in the positional shift detection process is corrected in the relative position adjustment process. Since the relative position with respect to the shaft is adjusted, the display state of the virtual image can be easily adjusted automatically without bothering the operator's hand, so that the adjustment work becomes very efficient. Therefore, even if this adjustment work is incorporated into a part of the manufacturing process of the HUD device, it is possible to suppress the manufacturing efficiency of the HUD device from greatly decreasing.

  Therefore, according to the first and second aspects of the invention, there is provided a method for manufacturing a head-up display device capable of efficiently adjusting a display state of a virtual image and suppressing a decrease in manufacturing efficiency of the HUD device. Can be provided.

  In addition, as an optical system for magnifying an image according to claims 1 and 2, a magnifying glass or a convex lens having a magnifying function, for example, having a concave mirror surface is applicable.

  The invention described in claim 3 is characterized in that the reference point preset at the specific position of the virtual image of the inspection image is the center point of the inspection image.

  According to the present invention, the reference point preset at the specific position of the virtual image of the inspection image is set as the center point of the inspection image. The light emitted from the center point of the inspection image passes through the central portion where the optical characteristics of the optical system are relatively stable. By setting the reference point of the virtual image of the inspection image as the center point of the inspection image, the reference point itself is hardly distorted. For this reason, the extraction accuracy at the time of extracting an imaging | photography reference point improves in a position shift detection process. Therefore, the adjustment accuracy of the display state of the virtual image in the relative position adjustment process is improved.

  According to a fourth aspect of the present invention, in the relative position adjustment step, the relative position between the inspection image and the optical axis of the optical system is adjusted by changing the display position of the inspection image on the screen of the image output device. It is characterized by doing.

  According to the present invention, the relative position between the inspection image and the optical axis of the optical system is adjusted by changing the display position of the inspection image on the screen. The relative position can be easily adjusted without providing an output device or an optical system with a mechanism for changing the position in the HUD device. Moreover, since it is not necessary to provide a change mechanism, it can contribute to further miniaturization of the HUD device.

  The invention according to claim 5 is characterized in that, in the relative position adjustment step, the relative position between the inspection image and the optical axis of the optical system is adjusted by changing the position of the image output device.

  According to the present invention, the adjustment of the relative position between the inspection image and the optical axis of the optical system performed in the relative position adjustment step is performed by changing the position of the image output device. There is no need to adjust the display position of the detection image on the screen. For this reason, an image output device having a screen of the minimum necessary size can be used. Here, changing the position of the image output device includes changing the position of the image output device itself or changing only the screen position of the image output device.

  According to a sixth aspect of the present invention, in the relative position adjustment step, the inspection image and the optical axis of the optical system are changed by changing the position of the optical system and the display position of the inspection image on the screen of the image output device. The relative position is adjusted.

  As in the present invention, the adjustment of the relative position between the inspection image and the optical axis of the optical system performed in the relative position adjustment step is to change both the display position of the inspection image on the screen and the position of the optical system. May be performed.

The invention according to claim 7 is an image output device that outputs an image, an optical system that enlarges the image, projects the image onto a windshield of the vehicle, and displays a virtual image of the image inside the vehicle, and the image and the optical system. In a virtual image adjusting device for adjusting a display state of a virtual image of a head-up display device having a changing means for changing a relative position with respect to an optical axis,
A normal reference point when the relative positional relationship between the inspection image and the optical axis of the optical system is normal is used as a reference point predetermined at a specific position of the virtual image of the inspection image that is a still image output from the image output device. A reference point display means for displaying on the projection side of the inspection image of the optical system;
Imaging means for photographing a virtual image of the inspection image together with a normal reference point;
A misregistration detection means for extracting a reference point of a virtual image of an inspection image as a photographing reference point from a photographed image photographed by the photographing means, and detecting a misalignment between the photographing reference point and the normal reference point;
And a relative position adjusting unit that adjusts the relative position by changing the relative position between the inspection image and the optical axis of the optical system by a changing unit so as to correct the positional deviation.

An image output device that outputs an image, an optical system that enlarges the image, projects the image onto a windshield of the vehicle, and displays a virtual image of the image inside the vehicle, and the image and optical In a virtual image adjusting device for adjusting a display state of a virtual image of a head-up display device having a changing means for changing a relative position with respect to an optical axis of the system
Normal reference point when the relative positional relationship between the inspection image and the optical axis of the optical system is normal as a reference point preset at a specific position of the virtual image of the inspection image that is a still image output from the image output device Storage means for storing the position information of
Imaging means for capturing a virtual image of the inspection image;
The reference point of the virtual image of the inspection image is extracted as a shooting reference point from the captured image captured by the imaging unit, and the normal reference point specified from the positional information of the normal reference point stored in the storage unit, and shooting A positional deviation detecting means for detecting a positional deviation from the reference point;
And a relative position adjusting unit that adjusts the relative position by changing the relative position between the inspection image and the optical axis of the optical system by a changing unit so as to correct the positional deviation.

  According to the seventh aspect of the present invention, the positional deviation between the photographing reference point extracted from the photographed image photographed by the imaging means and the normal reference point is detected by the positional deviation detecting means. In the invention according to claim 8, the positional deviation detection means is characterized by the shooting reference point extracted from the shot image shot by the imaging means and the position information of the normal reference point stored in the storage means. The positional deviation from the regular reference point is detected.

  In any case, the HUD device adjusts the relative position between the inspection image and the optical axis of the optical system so as to correct the detected positional deviation by the relative position adjusting means. The changing means provided changes the relative position between the inspection image and the optical axis of the optical system. Due to the changing operation performed by the changing means, the positional relationship between the inspection image and the optical axis of the optical system approaches a normal positional relationship, so that a virtual image with reduced distortion can be easily obtained.

  According to the seventh and eighth aspects of the invention described above, the change means provided in the HUD device is used for inspection so that the relative position adjusting means corrects the positional deviation obtained by the positional deviation detecting means. Since the relative position of the image and the optical axis of the optical system is changed, the display state of the virtual image can be easily adjusted automatically without bothering the operator's hand, so adjustment work is very Become efficient. Therefore, even if this adjustment work is incorporated into a part of the manufacturing process of the HUD device, it is possible to suppress the manufacturing efficiency of the HUD device from greatly decreasing.

  Therefore, according to the invention of Claim 7 and Claim 8, it can adjust the display state of a virtual image efficiently, and can manufacture the manufacturing method of the head-up display apparatus which can suppress the fall of the manufacturing efficiency of a HUD apparatus. A virtual image adjusting apparatus suitable for use can be provided.

  In addition, as an optical system for magnifying an image according to claims 7 and 8, for example, a magnifying glass or a convex lens having an image magnifying function, for example, having a concave mirror surface is applicable. In addition, since the inventions according to the seventh and eighth aspects are inventions relating to a virtual image adjusting apparatus including the steps described in the first and second aspects as means, respectively, the first and second aspects are provided. The inventions described in claims 3 to 6 can be applied.

It is a schematic structure figure showing the state where the head up display device by a 1st embodiment of the present invention was applied to vehicles. It is a schematic block diagram which shows the structure of an image output device. It is a top view which shows the state by which the image was displayed on the screen of a liquid crystal panel. It is a perspective view of a magnifier. It is explanatory drawing explaining the influence which a display image receives when an image output device is installed in the diagonally lower right from the normal position toward the front of the vehicle, and the magnifier is installed in the diagonally upper left from the normal position toward the vehicle front. is there. It is a figure which shows the state of the display image seen from a passenger | crew in the state shown in FIG. It is explanatory drawing explaining the influence which a display image receives when an image output device is installed in the upper left direction from the normal position toward the front of the vehicle, and the magnifier is installed in the lower right direction from the normal position toward the vehicle front. is there. It is a figure which shows the state of the display image seen from a passenger | crew in the state shown in FIG. It is a schematic block diagram of the virtual image adjustment apparatus which adjusts the display state of the display image displayed ahead of a front windshield when a HUD apparatus is operated. It is the functional block diagram which showed the function of the virtual image adjustment apparatus. It is a flowchart which shows the adjustment procedure of the display state of a display image. It is explanatory drawing explaining the adjustment operation | work of the display image in the state shown in FIG. FIG. 8 is an explanatory diagram illustrating a display image adjustment operation in the state illustrated in FIG. 7. It is the functional block diagram which showed the function of the virtual image adjustment apparatus by 2nd Embodiment. It is a flowchart which shows the adjustment procedure of the display state of the display image by 2nd Embodiment. It is a schematic block diagram which shows the structure of the image output device by 3rd Embodiment. It is a schematic block diagram which shows the structure of the image output device by 4th Embodiment. It is a schematic block diagram which shows the structure of the image output device and magnifier by 5th Embodiment.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. In addition, the overlapping description is abbreviate | omitted by attaching | subjecting the same code | symbol to the component corresponding in each embodiment.

(First embodiment)
A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a state in which the head-up display device (HUD device) of the first embodiment to which the present invention is applied is applied to a vehicle.

  As shown in FIG. 1, the HUD device 10 is installed in an inner space of an instrument panel (instrument panel) 70 that extends from the lower edge of the front windshield 60 toward the vehicle interior side. The HUD device 10 displays various information (images) 32 on the screen 30a, reflects light emitted from the image output device 12 toward the front windshield 60, and enlarges the image 32. And a magnifying mirror 14 as an optical system for projecting onto the front windshield 60. A solid line 16 on the incident side (image output device 12 side) of the magnifier 14 shown in FIG. 1 represents the optical axis 16 on the incident side of the optical system, and a solid line on the exit side (front windshield 60 side) of the magnifier 14. Reference numeral 18 denotes an optical axis 18 on the exit side of the optical system. FIG. 1 shows a state in which light emitted from the screen 30 a travels on a solid line including the optical axes 16 and 18 and reaches the occupant's eye range 80. As a result, the occupant visually recognizes that the virtual image 24 of the image 32 exists on the foreground of the vehicle (on the opposite side of the occupant with the front windshield 60 interposed therebetween).

  The image output device 12 and the magnifying glass 14 are accommodated in a housing (not shown) of the HUD device 10 so that the relative position between the image 32 of the image output device 12 and the optical axis 16 of the magnifying glass 14 is a predetermined position. Are fixed by predetermined fixing means.

  The image output device 12 is installed on the vehicle so as to emit light forward of the vehicle. The magnifier 14 faces the rear of the vehicle and directs the light from the image output device 12 toward the front windshield 60. It is installed in the position where it reflects.

  In the present embodiment, the shape of the virtual image 24 recognized by the occupant is two in the vertical direction and four in the horizontal direction perpendicular to the vertical direction and parallel to the left-right direction of the vehicle, as shown in FIG. It has a lattice shape in which two cells are formed adjacent to each other. In the present embodiment, the size of the virtual image 24 is the maximum size that the HUD device 10 is to display.

  Further, the instrument panel 70 is formed with a cylindrical light guide 26 that has an opening on the upper surface of the instrument panel 70 and guides the image light 18 reflected by the magnifier 14 to the front windshield 60. . The light guide 26 is provided with a cover 28 so as to close the light guide 26 without a gap. The cover 28 protects the inner space of the instrument panel 70 from dust.

  Next, each of the image output device 12 and the magnifying glass 14 will be described in detail.

  FIG. 2 is a schematic configuration diagram of the image output device 12 used in the present embodiment. The image output device 12 is a liquid crystal display device, and includes a liquid crystal panel 30, a backlight 34, a control device 36, and the like.

  The liquid crystal panel 30 is, for example, a dot matrix type TFT transmissive liquid crystal panel in which a screen 30a is formed from a plurality of liquid crystal pixels arranged in a two-dimensional direction. The light transmittance of each liquid crystal pixel constituting the screen 30 a is controlled by the control device 36. The transmittance of the liquid crystal pixel is controlled by controlling the voltage applied to the pixel. The screen 30 a is installed toward the magnifying glass 14 so that the light transmitted through the liquid crystal pixels enters the magnifying glass 14.

  FIG. 3 is a plan view showing a state in which the image 32 is displayed on the screen 30 a of the liquid crystal panel 30. In the present embodiment, when two directions orthogonal to the emission direction of the light emitted from the screen 30a are the X1 direction and the Y1 direction, the sizes of the X1 direction and the Y1 direction of the screen 30a are displayed on the screen 30a. The size of the largest image 32 to be attempted is set larger than the sizes in the X1 direction and the Y1 direction. Thus, the image 32 can be freely moved in the X1 direction and the Y1 direction within the screen 30a.

  As shown in FIG. 2, the backlight 34 is installed on the opposite side of the liquid crystal panel 30 from the magnifier 14 and emits light toward the liquid crystal panel 30. The backlight 34 is composed of, for example, a light emitting diode (LED), and is controlled by the control device 36.

  The control device 36 controls the transmittance of the liquid crystal pixels of the liquid crystal panel 30 and the turning on and off of the backlight 34. In addition to the liquid crystal panel 30 and the backlight 34, the control device 36 includes a combination meter (not shown) mounted on the vehicle so as to obtain information on the traveling path formed by the vehicle speed and arrows. It is electrically connected to a control device for controlling and a control device (not shown) for controlling the navigation device.

  Based on the obtained traveling speed and route display information, the control device 36 turns on the backlight 34 and controls the transmittance of individual liquid crystal pixels to display an image based on the information on the screen 30a. As a result, light corresponding to the displayed image 32 is emitted from the screen 30a.

  FIG. 4 is a perspective view of the magnifying glass. As shown in FIG. 4, the magnifying glass 14 has a reflecting surface 14a that reflects light. The reflection surface 14 a is a curved surface that is recessed toward the opposite side to the image output device 12. Two directions orthogonal to the normal direction of the central portion of the reflecting surface 14a are defined as an α direction and a β direction.

  Here, the light reflecting surface on the vehicle interior side of the front windshield 60 is a curved surface protruding outside the vehicle interior, and the curvature of the curved surface is not uniform throughout but is partially different. Yes. Specifically, the curved surface is bilaterally symmetric with respect to the center in the left-right direction of the vehicle, and the curvature increases toward the both ends from the center in the left-right direction.

  The curved surface of the reflecting surface 14a enlarges the image 32 from the image output device 12 in the α direction and the β direction, and obtains an optical action for correcting the distortion of the virtual image 24 generated based on the shape of the front windshield 60 described above. It has a curvature like that.

  As described above, the magnifying glass 14 sets the curvature so that the virtual image 24 formed in front of the front windshield 60 is not distorted. However, this is limited to the case where the light emitted from the image output device 12 is incident on the magnifier 14 at a predetermined incident angle. If the relative positional relationship between the image 32 of the image output device 12 and the optical axis 16 on the incident side of the magnifying glass 14 (see FIG. 1) shifts, the incident angle of the light changes, and the position of the virtual image 24 is normal. The position is shifted from the position, and the end portion of the virtual image 24 is distorted.

  The displacement of the relative position is caused by an assembly error when the image output device 12 and the magnifying glass 14 are assembled to the housing of the HUD device 10. The relative position shift also occurs due to the dimensional error of the housing. This assembly error or housing dimensional error causes distortion in the virtual image 24.

  Next, the influence on the display state (position shift and distortion) of the virtual image 24 due to the shift of the relative position between the image 32 of the image output device 12 and the optical axis 16 of the magnifier 14 will be described.

(When the image output device 12 is installed in the diagonally lower right direction from the normal position toward the front of the vehicle, and the magnifier 14 is installed in the diagonally upper left direction from the normal position toward the vehicle front)
FIG. 5 shows the case where the image output device 12 is installed in the vehicle forward direction and shifted from the normal position to the lower right and the magnifier 14 is installed in the vehicle front direction and shifted from the normal position to the upper left. It is explanatory drawing explaining the influence which the virtual image 24 receives.

  In FIG. 5, the image 32 and the magnifying glass 14 displayed on the image output device 12 installed at a position shifted from the normal position are indicated by solid lines, and the image 32 displayed on the image output device 12 installed at the normal position and The magnifier 14 is indicated by a broken line. A line indicated by a broken line connecting the image output unit 12 indicated by a broken line, the magnifying glass 14 indicated by a broken line, the front windshield 60, and the eye range 80 is a line corresponding to the solid line in FIG. 1, and the center of the image 32 of the image output unit 12 The path | route of the light radiate | emitted from is shown. The solid line connecting the image output unit 12 indicated by the solid line, the magnifier 14 indicated by the solid line, the front windshield 60 and the eye range 80 indicates the path of the light emitted from the center of the image 32 of the image output unit 12. Show.

  A virtual image 24 indicated by a broken line when the image output device 12 and the magnifying glass 14 are installed at a normal position is referred to as a normal virtual image 24. 22. Note that the center points O of the virtual image 22 and the virtual image 24 correspond to the center of the image 32 indicated by the solid line and the center of the image 32 indicated by the broken line, respectively.

  When the image output device 12 and the magnifying glass 14 are installed at a position deviated from the normal position, the incident angle of the incident light from the image output device 12 incident on the magnifying glass 14 is changed as compared with the case where the image output device 12 and the magnifying glass 14 are installed at the normal position. End up. For this reason, as shown in FIG. 5, the projection position on the front windshield 60 of the reflected light reflected by the magnifying mirror 14 changes compared to the case where it is installed at a normal position. In the present embodiment, as shown in FIG. 5, the pre-adjustment virtual image 22 is displayed to be shifted obliquely upward and rightward from the normal virtual image 24 toward the front of the vehicle (as viewed from the occupant). In the present embodiment, since there are two places that reflect light, that is, the magnifier 14 and the front windshield 60, the pre-adjustment virtual image 22 is displayed obliquely to the right and upward from the normal position when viewed from the occupant.

  Furthermore, as shown in FIG. 6, the pre-adjustment virtual image 22 that can be seen by the passenger has a shape in which the right end is distorted upward. This is because the incident position of the incident light from the image output device 12 on the magnifying glass 14 is shifted to the right side when viewed from the passenger.

(When the image output device 12 is installed diagonally to the left from the normal position facing the front of the vehicle, and the magnifier 14 is installed diagonally to the right and downward from the regular position facing the vehicle front)
FIG. 7 shows a case where the image output device 12 is installed in the vehicle front direction and shifted from the normal position to the upper left and the magnifier 14 is installed in the vehicle front direction and shifted from the normal position to the lower right. It is explanatory drawing explaining the influence which the virtual image 24 receives.

  In FIG. 7, the image 32 of the image output device 12 and the magnifying glass 14 that are installed with a deviation from the normal position are shown by solid lines as in FIG. 5, and the image that is displayed on the image output device 12 that is installed at the normal position. 32 and the magnifier 14 are indicated by broken lines. A line indicated by a broken line connecting the image output unit 12 indicated by a broken line, the magnifying glass 14 indicated by a broken line, the front windshield 60, and the eye range 80 is a line corresponding to the solid line in FIG. 1, and the center of the image 32 of the image output unit 12 The path | route of the light radiate | emitted from is shown. The solid line connecting the image output unit 12 indicated by the solid line, the magnifier 14 indicated by the solid line, the front windshield 60 and the eye range 80 indicates the path of the light emitted from the center of the image 32 of the image output unit 12. Show.

  In the present embodiment, as shown in FIG. 7, the pre-adjustment virtual image 22 is displayed to be shifted obliquely downward and leftward from the normal virtual image 24 toward the front of the vehicle (as viewed from the occupant). In the present embodiment, since there are a total of two locations that reflect light, that is, the magnifier 14 and the front windshield 60, the pre-adjustment virtual image 22 is displayed shifted obliquely to the left and downward from the normal position when viewed from the occupant.

  Further, as shown in FIG. 8, the pre-adjustment virtual image 22 that can be seen by the passenger has a shape in which the left end is distorted upward. This is because the incident position of the incident light from the image output device 12 to the magnifying glass 14 is shifted to the left side as viewed from the passenger.

  The distortion of the virtual image 22 increases as the magnification of the magnifying mirror 14 increases, that is, when the curvature of the magnifying mirror 14 increases, the portion at a position far from the center point O (pre-adjustment reference point 22a) of the virtual image 22 increases. It will be distorted. That is, when the magnifying rate of the magnifying glass 14 is increased, the influence on the distortion with respect to the relative position shift between the image output device 12 and the magnifying glass 14 becomes larger than that of the magnifying glass 14 having a small magnifying rate. Therefore, even if the displacement is small due to the dimensional error or assembly error of the housing, the distortion of the virtual image is distorted so much that it cannot be ignored by the occupant.

  In addition, the larger the magnification ratio of the magnifier 14, the shorter the distance between the image output device 12 and the magnifier 14 when displaying a virtual image having the same size as the virtual image before the magnification ratio is increased. it can. In addition, the size of the image 32 displayed by the image output device 12 can be reduced. That is, the size of the image output device 12 can be reduced. As described above, the HUD device 10 can be downsized by increasing the magnification ratio of the magnifier 14.

  However, as described above, increasing the magnification ratio of the magnifying glass 14 increases the influence on the distortion of the pre-adjustment virtual image 22 due to the assembly error of the image output device 12 and the magnifying glass 14, thereby stabilizing the display quality. It becomes difficult. For this reason, in manufacturing the HUD device 10, a process of adjusting the display state of the virtual image by changing the relative position between the image 32 of the image output device 12 and the optical axis 16 of the magnifier 14 is essential.

  FIG. 9 is a schematic configuration diagram of a virtual image adjusting device 40 that adjusts the display state of the pre-adjustment virtual image 22 displayed in front of the front windshield 60 when the HUD device 10 is operated.

  A virtual image adjusting device 40 shown in FIG. 9 includes an imaging device 42, an inspection chart 44, a control device 48, and the like.

  The virtual image adjusting device 40 adjusts the pre-adjustment virtual image 22 in a state in which the HUD device 10 is mounted on a vehicle or in a state in which the HUD device 10 is installed on an adjustment table simulating a vehicle on which the HUD device 10 is to be mounted. In the present embodiment, a case where the pre-adjustment virtual image 22 is adjusted with the HUD device 10 mounted on a vehicle will be described as an example.

  An imaging device 42 as an imaging unit is installed at the position of the eye range 80 shown in FIG. 1 and captures the virtual image 22 displayed on the front windshield 60. In the present embodiment, a CCD (Charge Coupled Device) camera is used as the imaging device 42. The imaging device 42 is not limited to a CCD camera, and a CMOS (Complementary Mental-Oxide Semiconductor) camera or the like may be used.

  Here, in the present embodiment, the image 32 displayed on the screen 30a of the image output device 12 is a lattice-shaped inspection image as shown in FIG. 3, and is the largest image that the HUD device 10 is to display. is there. This inspection image 32 is a still image. Hereinafter, this image 32 is referred to as an inspection image 32. The lattice-shaped image 32 is displayed at a position where the center point O of the inspection image 32 coincides with the center of the screen 30a. The center point O is a point corresponding to the pre-adjustment reference point 22a of the pre-adjustment virtual image 22. The imaging device 42 is electrically connected to the control device 48, and sends a captured image signal to the control device 48.

  The pre-adjustment reference point 22a illustrated in FIG. 9 is a reference point that is predetermined at a specific position of the virtual image of the inspection image 32 output from the image output unit 12, and the inspection image 32 and the optical axis 16 of the magnifying glass 14. This is a reference point when the relative positional relationship with is irregular.

  The inspection chart 44 is an index for adjusting the relative position between the image output device 12 and the magnifying glass 14, and is in front of the vehicle and near the position where the normal virtual image 24 (see FIG. 1) is formed. is set up. The inspection chart 44 has a plate-like plate member 46 having a flat surface, and a normal reference point 24 a serving as a reference located at the center of the normal virtual image 24 is displayed on the surface of the plate member 46. Has been. The inspection chart 44 corresponds to the reference point display means described in the claims.

  The normal reference point 24a illustrated in FIG. 9 is a reference point that is predetermined at a specific position of the virtual image of the inspection image 32 output from the image output device 12, and includes the inspection image 32, the optical axis 16 of the magnifying glass 14, and This is a reference point when the relative positional relationship of is normal.

  As described above, since the inspection chart 44 is installed in front of the vehicle, when the HUD device 10 is operated, the imaging device 42 displays the normal reference point 24 a displayed on the front windshield 60 and the pre-adjustment virtual image 22. Shoot together. For this reason, the imaging device 42 sends a signal of a photographed image obtained by photographing the pre-adjustment virtual image 22 including the normal reference point 24a and the pre-adjustment reference point 22a.

  The control device 48 detects the positional deviation between the pre-adjustment virtual image 22 and the normal virtual image 24 based on the photographed image sent from the imaging device 42, and the detected positional deviation is reduced so that the position of the virtual image 22 before adjustment is reduced. Adjust misalignment and distortion. In the present embodiment, the control device 48 sends the relative position between the inspection image 32 of the image output device 12 and the optical axis 16 of the magnifying glass 14 to the control device 36 of the HUD device 10 so that the detected displacement is reduced. To change. Specifically, the control device 36 changes the display position of the inspection image 32 on the screen 30a of the image output device 12, whereby the inspection image 32 of the image output device 12, the optical axis 16 of the magnifying glass 14, and the like. Is changed (see FIGS. 2 and 3). The control device 36 corresponds to changing means described in the claims.

  Hereinafter, a procedure for changing the relative position between the inspection image 32 of the image output device 12 and the optical axis 16 of the magnifier 14 and adjusting the virtual image 22 will be described. FIG. 10 is a functional block diagram illustrating functions of the virtual image adjusting device 40. As illustrated in FIG. 10, the control device 48 includes a misalignment detection unit 50 and a relative position adjustment unit 54.

  The positional deviation detection unit 50 detects the positional deviation of the pre-adjustment virtual image 22 from the normal virtual image 24. In the present embodiment, this is performed by comparing the normal reference point 24a in the normal virtual image 24 and the pre-adjustment reference point 22a in the pre-adjustment virtual image 22.

  The misregistration detection unit 50 performs image processing on the captured image sent from the imaging device 42, thereby extracting the imaging reference point 22b as the pre-adjustment reference point 22a shown in the captured image. Then, the detection unit 50 detects the normal reference point 24a and the photographing reference point 22b on the photographed image, and as shown in FIG. 9, the normal reference point 24a is in the horizontal direction with respect to the photographing reference point 22b. It detects how much it is shifted in the (X2 direction) and vertical direction (Y2 direction).

  In the example shown in FIG. 9, the normal reference point 24a is shifted from the imaging reference point 22b in the horizontal direction (X2 direction) by Δx toward the inspection chart 44 in the horizontal direction, and in the vertical direction (Y2 direction), It is shifted downward by Δy toward the inspection chart 44. The positional deviation detection unit 50 sets the position of the photographing reference point 22b to (X2b, Y2b) = (0, 0), and detects the position of the normal reference point 24a. In the present embodiment, the normal reference point 24a is located at (X2a, Y2a) = (− Δx, −Δy). Then, the misregistration detection unit 50 sends a detection result of misregistration of the normal reference point 24a with respect to the photographing reference point 22b to the relative position adjustment unit 54.

  The relative position adjustment unit 54 instructs the control device 36 on the screen 30a to inspect the positional deviation of the normal reference point 24a sent from the positional deviation detection unit 50 from the photographing reference point 22b. A command to change the display position of the work image 32 is sent to the control device 36 of the HUD device 10.

  As described above, the control device 36 changes the display position of the inspection image 32 so that the positional deviation of the imaging reference point 22b is reduced, whereby the pre-adjustment reference point 22a (imaging reference point) from the image output device 12 is obtained. Since the incident angle of the light corresponding to 22b) on the magnifying mirror 14 is a predetermined angle, the pre-adjustment reference point 22a moves to the position of the normal reference point 24a. Thereby, the positional deviation and distortion of the pre-adjustment virtual image 22 are adjusted.

  Next, the adjustment procedure of the pre-adjustment virtual image 22 will be described. FIG. 11 is a flowchart illustrating a procedure for adjusting the virtual image 22 according to the present embodiment.

  In this flowchart, the control device 48 of the virtual image adjustment device 40 is electrically connected to the control device 36 of the HUD device 10 in a vehicle on which the HUD device 10 in which the image output device 12 and the magnifying glass 14 are assembled is mounted. Start from state.

  In step S10, the imaging device 42 is installed in the range of the passenger's eye range 80, and the inspection chart 44 is installed in the vicinity of the position where the normal virtual image 24 is formed.

  The inspection chart 44 may be installed by an operator or by moving the vehicle with respect to the inspection chart 44 that is fixed in advance at a predetermined location. Further, a moving device may be provided on the inspection chart 44, and the moving device may be controlled by the virtual image adjusting device 40 to install the inspection chart 44 at an appropriate position.

  In step S20, the virtual image adjusting device 40 has a lattice shape as shown in FIG. 3 so that the center of the screen 30a of the image output device 12 and the center point O of the inspection image 32 coincide with the control device 36 of the HUD device 10. The inspection image 32 is displayed. The control device 36 sets the center point O of the inspection image 32 as the origin ((X1, Y1) = (0, 0)).

  In step S30 following step S20, the imaging device 42 captures the pre-adjustment virtual image 22 and the normal reference point 24a displayed on the front windshield 60, and sends a captured image signal to the misalignment detection unit 50.

  Thereafter, in step S <b> 40, the positional deviation detection unit 50 performs image processing on the photographed image, and extracts the photographing reference point 22 b as the pre-adjustment reference point 22 a of the pre-adjustment virtual image 22. Then, the detection unit 50 detects the normal reference point 24a and the shooting reference point 22b on the shot image, sets the shooting reference point 22b as the origin ((X2b, Y2b) = (0, 0)), and The positional deviation of the normal reference point 24a (X2a, Y2a) with respect to the origin is detected. In the present embodiment, the normal reference point 24a is (X2a, Y2a) = (− Δx, −Δy) (see FIG. 9).

  Since the installation position of the imaging device 42 is within the occupant's eye range 80, the adjustment in a state close to the actual use state is possible, and the adjustment accuracy of the display state of the pre-adjustment virtual image 22 is improved.

  Further, since the plate member 46 of the inspection chart 44 is installed near the position where the normal virtual image 24 is formed, the normal reference point 24a drawn on the plate member 46 by the imaging device 42 and the pre-adjustment virtual image 22 When imaging both, the imaging device 42 can easily focus on both the normal reference point 24a and the pre-adjustment virtual image 22. Thereby, the normal reference point 24a and the photographing reference point 22b can be detected with high accuracy.

  In subsequent step S50, it is determined whether or not the detected positional deviations (X2a, Y2a) are X2a = 0 and Y2a = 0. If any one of the coordinates indicates a numerical value other than 0 (zero), the coordinate information is sent to the relative position adjustment unit 54 and the process proceeds to step S60. On the other hand, if both coordinates indicate 0 (zero), the installation positions of the image output device 12 and the magnifying glass 14 are installed at normal positions with respect to the housing of the HUD device 10, and the pre-adjustment virtual image 22 is distorted. If it has not occurred, the adjustment work is terminated.

  In step S60, the relative position adjustment unit 54 instructs the control device 36 of the HUD device 10 to change the display position of the inspection image 32 so as to reduce the displacement between the imaging reference point 22b and the normal reference point 24a. send. In step S60, the adjustment unit 54 determines the inspection image corresponding to the imaging reference point 22b based on the positional deviation (X2a, Y2a) = (− Δx, −Δy) of the normal reference point 24a from the imaging reference point 22b. The display position on the screen 30a of the center point O on 32 is obtained. Then, the adjustment unit 54 sends an instruction to the control device 36 to change the display position of the inspection image 32 so that the center point O is displayed at the position obtained by the adjustment unit 54. The control device 36 changes the display position of the inspection image 32 on the screen 30a based on the instruction from the adjustment unit 54.

  In the present embodiment, the relative position adjustment unit 54 performs an inspection corresponding to the imaging reference point 22b based on the positional deviation of the normal reference point 24a with respect to the imaging reference point 22b (X2a, Y2a) = (− Δx, −Δy). The control device 36 is instructed to change the display position of the inspection image 32 on the screen 30a so that the center point O of the image 32 is displayed at the position (X1, Y1) = (− C1Δx, C2Δy). send. C1 and C2 are constants and are determined in advance by the magnification ratio of the magnifier 14 and the shape of the reflecting surface 14a of the magnifier 14.

  For example, when the image output device 12 is installed obliquely to the right and downward from the normal position toward the front of the vehicle, and the magnifier 14 is installed obliquely upward and to the left from the normal position toward the vehicle front, as shown in FIG. In addition, the relative position adjustment unit 54 moves the display position of the inspection image 32 diagonally upward to the left toward the front of the vehicle. Then, when the image output device 12 is installed obliquely upward and leftward from the normal position toward the front of the vehicle, and the magnifier 14 is installed obliquely downward and rightward from the normal position toward the vehicle front, as shown in FIG. In addition, the relative position adjustment unit 54 moves the display position of the inspection image 32 diagonally to the lower right toward the front of the vehicle.

  In step S60, after the control device 36 changes the display position of the inspection image 32 based on an instruction from the relative position adjustment unit 54, in step S30, the pre-adjustment virtual image 22 and the inspection chart after the display position change are performed again. 44 normal reference points 24a are photographed, and in step S40, a positional deviation of the normal reference point 24a with respect to the photographing reference point 22b is detected. In step S50, it is determined again whether or not the positional deviation of the normal reference point 24a has occurred. The operations from step S30 to step S60 are continuously repeated until it is determined that the positional deviation of the normal reference point 24a has not occurred.

  After the display position of the inspection image 32 is adjusted by the virtual image adjustment device 40, the control device 36 of the image output device 12 responds to various types of information on the basis of the position of the adjusted inspection image 32. The inspection image 32 is displayed on the screen 30a.

  As described above, the relative position adjustment unit 54 determines the inspection image 32 and the magnifying glass of the image output device 12 based on the positional deviation between the normal reference point 24a and the photographing reference point 22b obtained from the positional deviation detection unit 50. Since the display position of the pre-adjustment virtual image 22 is adjusted by changing the relative position of the 14 optical axis 16 to the control device 36 of the image output device 12, it is automatically performed without bothering the operator. A virtual image 22 without distortion can be easily obtained. Further, by using this virtual image adjustment device 40, the adjustment work can be performed very efficiently. Therefore, even if this adjustment work is incorporated into a part of the manufacturing process of the HUD device 10, it is possible to suppress the manufacturing efficiency of the HUD device 10 from being greatly reduced.

  In the present embodiment, the center points O of the virtual images 22 and 24 are employed as the reference points 22a, 22b, and 24a for detecting misalignment. The light emitted from the central point of the inspection image 32 for inspection passes through the central portion where the optical characteristics of the magnifier 14 are relatively stable. By using the pre-adjustment reference point 22a and the normal reference point 24a of the virtual images 22 and 24 as the center point of the inspection image 32, the reference points 22a and 24a themselves are hardly distorted. For this reason, the extraction accuracy at the time of extracting the imaging reference point 22b in the positional deviation detection unit 50 and the detection accuracy of the imaging reference point 22b and the normal reference point 24a are improved. Since the detection accuracy of the reference points 22b and 24a is improved, the adjustment accuracy of the display state of the virtual image 22 is improved.

  In addition, the screen 30a of the image output device 12 of the HUD device 10 according to the present embodiment is large enough to move the displayed inspection image 32 in the direction along the surface of the screen 30a. It is set. For this reason, a change in the relative position between the inspection image 32 and the optical axis 16 of the magnifying glass 14 can be changed by, for example, changing the display position of the inspection image 32 on the screen 30a. This can be done easily without using a moving device that moves the position of the 12 itself. According to this, the HUD device 10 can be reduced in size.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. The second embodiment is a modification of the virtual image adjusting device 40 described in the first embodiment. The second embodiment differs from the first embodiment in a part of the configuration of the virtual image adjusting device 40 and a part of the adjustment work of the virtual image 22. Hereinafter, a description will be given focusing on differences from the first embodiment. About the part which abbreviate | omits description, it is substantially the same as 1st Embodiment.

  Specifically, as shown in FIG. 14, the virtual image adjusting device 40 is provided with a storage device 47 that stores the positional information of the normal reference point 24 a of the normal virtual image 24 instead of the inspection chart 44. . The storage device 47 is electrically connected to the control device 48. The storage device 47 corresponds to the storage means described in the claims.

  In the adjustment flow by the virtual image adjusting device 40 according to the second embodiment, as shown in FIG. 15, the imaging device 42 performs the pre-adjustment virtual image through steps S130 and S140 instead of steps S30 and S40 of the first embodiment. Only 22 is imaged, and the displacement detection unit 50 detects the displacement of the normal reference point 24a with respect to the pre-adjustment reference point 22a.

  In step S <b> 130, the imaging device 42 captures only the pre-adjustment virtual image 22 displayed on the front windshield 60 and sends the captured image to the misalignment detection unit 50. In this embodiment, since the inspection chart 44 is not used, only the imaging device 42 is installed in the eye range 80 in step S110.

  In step S <b> 140, the positional deviation detection unit 50 reads position information of the normal reference point 24 a of the normal virtual image 24 stored in the storage device 47. Then, the positional deviation detection unit 50 performs image processing on the captured image sent from the imaging device 42, and extracts the imaging reference point 22b. Further, the positional deviation detection unit 50 specifies the normal reference point 24a from the position information of the normal reference point 24a, detects the shooting reference point 22b, and sets the real image reference point 22a on the captured image as the origin ((X2b, Y2b ) = (0, 0)). Then, the displacement detection unit 50 detects the displacement of the normal reference point 24a (X2a, Y2a) with respect to the origin.

  According to the second embodiment described above, it is possible to detect a positional deviation between the imaging reference point 22b and the normal reference point 24a without installing the inspection chart 44 in front of the vehicle. According to this, there is no restriction on the place where the adjustment work is performed. For example, according to the present embodiment, the adjustment work can be performed in a place where the installation place of the inspection chart 44 cannot be secured.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings. The third embodiment is a modification of the HUD device 10 described in the first embodiment. In the third embodiment, the configuration of the image output device 112 is different from that of the first embodiment. Hereinafter, a description will be given focusing on differences from the first embodiment. About the part which abbreviate | omits description, it is substantially the same as 1st Embodiment.

  Specifically, as shown in FIG. 16, the image output unit 112 of the HUD device 10 can move the position of the image output unit 112 in the direction along the surface of the screen 30a, that is, the X1 direction and the Y1 direction. The moving device 90 is provided. The moving device 90 drives, for example, an electric motor 90a, a transmission mechanism 90b that converts the rotational force of the electric motor 90a into motion in the X1 direction and Y1 direction, and transmits the motion to the image output device 112, and the electric motor 90a. It is comprised from the control part 90c which performs. The control unit 90 c is electrically connected to the control device 36 and is controlled by the control device 36. The control unit 90c may be configured to be directly electrically connected to the control device 48 of the virtual image adjusting device 40.

  The display position of the inspection image 32 obtained in step S60 (first embodiment) or step S160 (second embodiment) sent from the relative position adjustment unit 54 via the control device 36 or directly is changed. Based on the instruction, the control unit 90c controls the drive of the electric motor 90a to change the position of the image output unit 112 itself. This also allows the relative position between the inspection image 32 on the screen 30a and the optical axis 16 of the magnifying glass 14 to be changed.

  In this embodiment, the image output device 112 as shown in FIG. 12 is installed diagonally to the right from the normal position toward the front of the vehicle, and the magnifier 14 is installed diagonally to the left from the normal position toward the vehicle front. In this case, the moving device 90 moves the image output device 112 diagonally upward to the left toward the front of the vehicle.

  In the HUD device 10 of the present embodiment, the relative position between the inspection image 32 and the optical axis 16 of the magnifying glass 14 is changed by moving the position of the image output device 112 itself. There is no need to make the size of the screen 30a larger than 32. For this reason, the size of the screen 30a can be made as small as possible.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings. The fourth embodiment is a modification of the HUD device 10 described in the first embodiment. In the fourth embodiment, the configuration of the image output device 212 is different from that of the first embodiment. Hereinafter, a description will be given focusing on differences from the first embodiment. About the part which abbreviate | omits description, it is substantially the same as 1st Embodiment.

  Specifically, as shown in FIG. 17, the image output unit 212 of the HUD device 10 can move the position of the liquid crystal panel 30 in the direction along the surface of the screen 30a, that is, the X1 direction and the Y1 direction. A moving device 92 is included. The moving device 92 drives and controls, for example, an electric motor 92a, a transmission mechanism 92b that converts the rotational force of the electric motor 92a into movement in the X1 direction and the Y1 direction, and transmits the movement to the liquid crystal panel 30, and the electric motor 92a. It is comprised from the control part 92c. The control unit 92c is electrically connected to the control device 36 and is controlled by the control device 36. Further, the control unit 92c may be configured to be directly electrically connected to the control device 48 of the virtual image adjusting device 40.

  The display position of the inspection image 32 obtained in step S60 (first embodiment) or step S160 (second embodiment) sent from the relative position adjustment unit 54 via the control device 36 or directly is changed. Based on the instruction, the controller 92c changes the position of the liquid crystal panel 30 by controlling the drive of the electric motor 92a. This also allows the relative position between the inspection image 32 on the screen 30a and the optical axis 16 of the magnifying glass 14 to be changed.

  In the present embodiment, an image output device 212 as shown in FIG. 12 is installed diagonally to the right from the normal position toward the front of the vehicle, and the magnifier 14 is installed diagonally to the left from the normal position toward the vehicle front. In this case, the moving device 92 moves the liquid crystal panel 30 of the image output device 112 diagonally upward to the left toward the front of the vehicle.

  In the HUD device 10 according to the present embodiment, the relative position between the inspection image 32 and the optical axis 16 of the magnifying glass 14 is changed by changing the position of the liquid crystal panel 30. The device is not as large as the moving device 90 that moves the image output device 112 itself as in the third embodiment. Therefore, according to the present embodiment, the image output device 212 can be downsized as compared with the image output device 112 of the third embodiment.

(Fifth embodiment)
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings. The fifth embodiment is a modification of the HUD device 10 described in the first embodiment. In the fifth embodiment, the configuration of the image output device 312 and the configuration of the magnifying glass 14 are different from those of the first embodiment. Hereinafter, a description will be given focusing on differences from the first embodiment. About the part which abbreviate | omits description, it is substantially the same as 1st Embodiment.

  Specifically, as shown in FIG. 18, the magnifying glass 214 includes a projection position changing unit 94 that changes the projection position of the inspection image 32 displayed by the image output unit 312 onto the front windshield 60. The projection position changing unit 94 rotates the magnifying glass 214 around the rotation axis 96 provided on the magnifying glass 214 to change the projection position of the inspection image 32 on the front windshield 60.

  When the magnifying glass 214 rotates around the rotation axis 96, the reflection angle of the image light 16 from the image output device 312 on the reflection surface 214a changes. As a result, the projection position of the inspection image 32 on the front windshield 60 changes.

  As shown in FIG. 18, when the magnifying glass 214 rotates around the rotation axis 96 so that the lower side of the magnifying glass 214 approaches the passenger, the projection position of the inspection image 32 on the front windshield 60 moves upward. When the magnifying glass 214 rotates around the rotation axis 96 so that the lower side of the magnifying glass 14 is far from the passenger, the projection position of the inspection image 32 moves downward.

  The projection position changing unit 94 includes, for example, an electric motor 94a that generates a rotational force that rotates a rotating shaft, and a control unit 94b that drives and controls the electric motor 94a. The control unit 94b is electrically connected to a switch 98 provided on the instrument panel 70 that can be operated by an occupant.

  As shown in FIG. 18, the switch 98 is provided with buttons for selecting “UP” and “DOWN”. When the occupant operates the “UP” button to move the projection position of the inspection image 32 upward, a signal corresponding to the operation of the “UP” button is sent from the switch 98 to the control unit 94b. Receiving the signal, the controller 94b drives the electric motor 94a to rotate the magnifying glass 214 so that the lower side of the magnifying glass 214 approaches the passenger compartment.

  When the occupant operates the “DOWN” button to move the projection position of the inspection image 32 downward, a signal corresponding to the operation of the “DOWN” button is sent from the switch 98 to the control unit 94b. Receiving the signal, the controller 94b drives the electric motor 94a to rotate the magnifier 214 so that the lower side of the magnifier 214 is far from the passenger compartment.

  The control unit 94b is electrically connected to the control device 48 of the virtual image adjusting device 40, and controls the electric motor 94a to drive the magnifying glass 214 around the rotation shaft 96 based on an instruction from the control device 48. It can be rotated.

  As shown in FIG. 18, the projection position changing unit 94 rotates the magnifying glass 214 around the rotation axis 96, so that the position where the light emitted from the screen 30 a enters the magnifying glass 214 is orthogonal to the rotation axis 96 ( move in the β direction). Therefore, by rotating the magnifying glass 214 around the rotation axis 96, the same effect as when the inspection image 32 is moved in the Y1 direction on the screen 330a can be exhibited. For example, to obtain the same effect as when the inspection image 32 is moved upward, the magnifying glass 214 is rotated so that the lower side approaches the passenger compartment. To obtain the same effect as when moving the inspection image 32 downward, the magnifying glass 214 is rotated so that the lower side is far from the passenger compartment.

  The image output device 312 includes a liquid crystal panel 330 having a screen size different from that of the liquid crystal panel 30 of the first embodiment. Unlike the liquid crystal panel 30 of the first embodiment, the screen 330a of the liquid crystal panel 330 is set to be larger than the inspection image 32 only in the X1 direction along the rotation axis 96 of the screen 330a. In the liquid crystal panel 330, the inspection image 32 cannot be moved in the Y1 direction. The control unit 36 of the image output device 312 is electrically connected to the control device 48 of the virtual image adjustment device 40 as in the first embodiment, and the inspection image 32 is displayed in the X1 direction based on an instruction from the control device 48. To change.

  The relative position between the inspection image 32 and the optical axis 16 of the magnifying glass 214, which is sent from the relative position adjustment unit 54 and obtained in step S60 (first embodiment) or step S160 (second embodiment), is changed. Based on the instruction, the control unit 94b of the projection position changing unit 94 drives and controls the electric motor 94a to change the rotation angle of the magnifying glass 214, and the control device 36 of the image output device 312 controls the inspection image on the screen 330a. 32, the display position in the X1 direction is changed.

  In the present embodiment, an image output device 312 as shown in FIG. 12 is installed obliquely to the lower right from the normal position toward the front of the vehicle, and the magnifier 14 is installed obliquely upward to the left from the normal position toward the vehicle front. In this case, the control unit 94b drives and controls the electric motor 94a to rotate the magnifying glass 214 so that the lower side of the magnifying glass 214 is away from the passenger compartment, and the control device 36 changes the display position of the inspection image 32 to the left. To do.

  In the present embodiment, by using the projection position changing unit 94 provided to adjust the projection position of the inspection image 32 onto the front windshield 60, the inspection image 32 on the screen 330a of the image output device 312 is displayed. The moving direction can be reduced compared to that of the first embodiment. According to this, the area of the screen 330a of the liquid crystal panel 330 can be reduced, and the cost increase of the image output device 312 can be suppressed.

(Other embodiments)
In the above, several embodiment of this invention was described. The present invention is not construed as being limited to the above-described embodiments, and can be applied to various embodiments without departing from the scope of the invention.

  For example, in the first embodiment, another plane mirror or a magnifying lens may be installed between the image output device 12 and the magnifying glass 14 or between the magnifying glass 14 and the front windshield 60.

  In the first embodiment and the second embodiment, the adjustment work is ended when the values of X2a and Y2a become 0 (zero) in the determination processing in step S50 and step S150. It need not be (zero). Any judgment value may be used so long as it is impossible to judge the distortion of the virtual image by the passenger.

  Further, as in the third and fourth embodiments, the moving devices 90 and 92 may be provided in the magnifier 14 without providing the moving devices 90 and 92 in the image output devices 112 and 212. Further, the moving devices 90 and 92 may be provided in both the image output devices 112 and 212 and the magnifying glass 14.

  Furthermore, in the fifth embodiment, the image output device 312 itself may be moved in the X1 direction of the screen 30a, or the liquid crystal panel 30 of the image output device 312 may be moved in the X1 direction.

  DESCRIPTION OF SYMBOLS 10 Head-up display apparatus (HUD apparatus), 12 Image output device, 14 Magnifier, 16 Optical axis, 18 Optical axis, 22 Virtual image (virtual image before adjustment), 22a Reference point before adjustment, 22b Reference point of photography, 24 Virtual image (normal) Virtual image), 24a century reference point, 30 liquid crystal panel, 30a screen, 32 image (inspection image), 34 backlight, 36 control device, 40 virtual image adjustment device, 42 imaging device (imaging means), 44 inspection chart (reference point) Display means), 46 plate member, 47 storage device (storage means), 48 control device, 50 position deviation detection section (position deviation detection means), 54 relative position adjustment section (relative position adjustment means), 60 front windshield, 70 Instrument panel (instrument panel), 80 eye range, 90 moving device, 92 moving device, 94 Projection position change Additional part, 96 axis of rotation, 98 switches

Claims (8)

An image output device for outputting an image; and an optical system for enlarging the image and projecting the image on a windshield of a vehicle. In a method for manufacturing a head-up display device that displays a virtual image of an image,
As a reference point preset at a specific position in the virtual image of the inspection image that is a still image output from the image output device, the normal position when the relative positional relationship between the inspection image and the optical axis of the optical system is normal A reference point display step of displaying a reference point on the projection side of the inspection image of the optical system;
An imaging step of photographing a virtual image of the inspection image together with the normal reference point;
A misregistration detection step of extracting a reference point of the virtual image of the inspection image as a photographing reference point from the photographed image photographed in the photographing step, and detecting a misalignment between the normal reference point and the photographing reference point; ,
A method for manufacturing a head-up display device, comprising: a relative position adjustment step of adjusting a relative position between the inspection image and the optical axis of the optical system so as to correct the displacement. An image output device for outputting an image; and an optical system for enlarging the image and projecting the image on a windshield of a vehicle. In a method for manufacturing a head-up display device that displays a virtual image of an image,
When the relative positional relationship between the inspection image and the optical axis of the optical system is normal as a reference point preset at a specific position in the virtual image of the inspection image that is a still image output from the image output device A storing step for storing position information of the normal reference point;
An imaging step of capturing a virtual image of the inspection image;
The reference point of the virtual image of the inspection image is extracted as a shooting reference point from the shot image shot in the imaging step, and the normal reference point specified from the positional information of the normal reference point and the shooting reference point A misalignment detection step of detecting misalignment with
A method for manufacturing a head-up display device, comprising: a relative position adjustment step of adjusting a relative position between the inspection image and the optical axis of the optical system so as to correct the displacement.   The method for manufacturing a head-up display device according to claim 1, wherein the reference point set in advance at a specific position of the virtual image of the inspection image is a center point of the inspection image.   In the relative position adjustment step, the relative position between the inspection image and the optical axis of the optical system is adjusted by changing the display position of the inspection image on the screen of the image output device. A method for manufacturing a head-up display device according to any one of claims 1 to 3.   4. The relative position adjustment step adjusts the relative position between the inspection image and the optical axis of the optical system by changing the position of the image output device. 5. A method for manufacturing a head-up display device according to one item.   In the relative position adjustment step, the relative position between the inspection image and the optical axis of the optical system is changed by changing the position of the optical system and the display position of the inspection image on the screen of the image output device. The method for manufacturing a head-up display device according to claim 1, wherein the head-up display device is adjusted. An image output device that outputs an image; an optical system that enlarges the image, projects the image onto a windshield of a vehicle, and displays a virtual image of the image in the vehicle of the vehicle; and the image and an optical axis of the optical system In the virtual image adjusting device for adjusting the display state of the virtual image of the head-up display device having changing means for changing the relative position,
As a reference point that is predetermined at a specific position of a virtual image of an inspection image that is a still image output from the image output device, the normal position when the relative positional relationship between the inspection image and the optical axis of the optical system is normal A reference point display means for displaying a reference point on the projection side of the inspection image of the optical system;
Imaging means for capturing a virtual image of the inspection image together with the normal reference point;
A displacement detection means for extracting a reference point of a virtual image of the inspection image as a photographing reference point from a photographed image photographed by the imaging means, and detecting a displacement between the photographing reference point and the normal reference point; ,
Relative position adjustment means for adjusting the relative position by changing the relative position of the inspection image and the optical axis of the optical system to the change means so as to correct the displacement. A virtual image adjusting device for a head-up display device. An image output device that outputs an image; an optical system that enlarges the image, projects the image onto a windshield of a vehicle, and displays a virtual image of the image in the vehicle of the vehicle; and the image and an optical axis of the optical system A virtual image adjusting device for adjusting a display state of the virtual image of a head-up display device having a changing means for changing a relative position;
In the case where the relative positional relationship between the inspection image and the optical axis of the optical system is normal as a reference point preset at a specific position of the virtual image of the inspection image that is a still image output from the image output device Storage means for storing the position information of the normal reference point;
Imaging means for capturing a virtual image of the inspection image;
The reference point of the virtual image of the inspection image is extracted as a shooting reference point from the shot image picked up by the image pickup unit, and the normal point specified from the position information of the normal reference point stored in the storage unit A positional deviation detecting means for detecting a positional deviation between a reference point and the photographing reference point;
Relative position adjustment means for adjusting the relative position by changing the relative position of the inspection image and the optical axis of the optical system to the change means so as to correct the displacement. A virtual image adjusting device for a head-up display device.

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