JP2006248322A - Display device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device for a vehicle capable of performing a position adjustment of a display image without causing a display distortion. <P>SOLUTION: When a display light of an image displayed on a display source 5 is reflected on a projection area E of a windshield 3 by a reflecting mirror 4, and a virtual image of the image projected on the projection area E and a foreground of the vehicle visually recognized through the windshield 3 are superposed and visually recognized, the display device for the vehicle uses the reflecting mirror 4 which is formed so as to offset the distortion on the image visually recognized from an eyepoint of the vehicle caused due to the non-planarity of the windshield 3. The display device for the vehicle is also equipped with a movement means moving the reflecting mirror 4 so that the display light reflected at the reflection points D<SB>1</SB>, E<SB>1</SB>, F<SB>1</SB>on the reflecting mirror 3 is reflected toward the eyepoint at the projection points D<SB>0</SB>, E<SB>0</SB>, F<SB>0</SB>on the predetermined projection area E corresponding to the reflection points D<SB>1</SB>, E<SB>1</SB>, F<SB>1</SB>, and the reflecting mirror 4 is adjusted so that the display light is reflected toward the eyepoint by moving the movement means. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device for a vehicle, and more specifically, a virtual image of the image projected on the projection area by reflecting an image displayed on a display source on a projection area of a windshield of the vehicle by a reflection mirror. And the foreground of the vehicle to be visually recognized through the windshield from the eyepoint of the vehicle, the distortion generated in the image viewed from the eyepoint of the vehicle due to the non-planarity of the windshield. The present invention relates to a vehicle display device using the reflection mirror formed so as to cancel.

  In recent years, in order to improve driver visibility, a projection display unit called a head-up display (HUD) device that displays a virtual image with a predetermined projection area of the windshield as a reflecting surface has been adopted in some vehicle types. Yes.

  FIGS. 4A and 4B are diagrams showing a schematic configuration for explaining the reflection points of light rays corresponding to the windshield and the aspherical mirror at the center of the eye range, and the reflection points on the reflection surface of the aspherical mirror, respectively. .

  As shown in FIG. 4A, a general HUD apparatus includes a reflection mirror 4 and a self-luminous device (for example, an FE (field emission) display) provided in an instrument panel (hereinafter referred to as instrument panel) 1 of a vehicle. , A fluorescent display tube, an EL [electroluminescence] display, etc.) and a display source 5 such as a liquid crystal display with a backlight, and the image displayed on the display source 5 and reflected by the reflection mirror 4 is the opening of the instrument panel 1. The virtual image of the image projected on the projection area E of the windshield 3 of the vehicle from the part (not shown) and the vehicle seen through the windshield 3 from an arbitrary eye point in the eye range IR of the vehicle Make the foreground visible.

  In this way, the HUD device has a display position that is smaller than the conventional display device by reducing the angle at which the driver drops his / her line of sight in order to view the display, shortening the movement time of the line of sight, By doing so, it aims at merits such as making the eyes easier to focus when shifting the line of sight from the foreground of the vehicle to the display.

  The eye range IR has eye points IU and IL corresponding to the upper and lower limits thereof, and an eye point IM located at the center thereof. As described above, when displaying the image by reflecting it on the windshield 3, the windshield 3 is not a symmetric curved surface for the driver. If the windshield 3 is displayed as it is in the projection area, the virtual image is distorted. In many cases, an aspherical mirror is used as the reflecting mirror 4.

Such a reflection mirror 4 suppresses distortion in the windshield 3, so that the windshield 3 corresponding to the upper display portion, the display center, and the lower display portion of the display source 5, as shown in FIGS. 4 (a) and 4 (b). the reflecting surface 4a of the reflection points a _0, B _0, C ₀ to to offset the virtual image distortion of at reflection points a _1, B _1, C ₁ of the reflecting surface 4a of the reflecting mirror 4 corresponding reflecting mirror 4 in Has been designed.

  The HUD device is further provided with a display position adjustment mechanism for adjusting the position of the display image in order to ensure that the display can be seen even if the driver's eye point moves within the eye range IR. This display position adjustment mechanism keeps the depression angle, which is the direction in which the display is viewed from the eye point, before and after the position adjustment that occurs when the eye point is moved up and down in the eye range IR, for example, due to a difference in the height of the driver. It is trying to be.

The applicant has proposed a HUD device that can accurately adjust the position of a display image accompanying the vertical movement of an eye point. The HUD device reflects the display image of the display source toward the translucent reflecting means arranged in the visual field in front of the driver by the reflecting means so that the driver can visually recognize the virtual image in front of the windshield. When viewing the display at different eye points in the eye range, the display image moving means displays the display source as the reflecting means moves rearward by the moving means that linearly moves the reflecting means in the longitudinal direction of the vehicle. The display position of the display source can be adjusted so that the depression angle does not change by moving the image upward and the display image of the display source downward as the reflection unit moves forward (Patent Document 1).
JP 2003-39981 A

  However, in the HUD device described above, the position of the display image can be adjusted with high accuracy as the eyepoint moves up and down, but it is necessary to move the reflecting means and the display source, which increases the size of the device. There was a problem. In recent years, the space in the instrument panel where the optional HUD device can be installed is limited due to an increase in the number of system parts mounted on the vehicle. The HUD device installed on the upper or rear upper part of the instrument In order to receive restrictions from various contents such as ducts, wire harnesses, and defroster openings, it was necessary to realize further miniaturization.

  In addition, when the cross point of the center optical axis of each eye point in the eye range is set near the reflecting surface of the reflecting mirror, the reflecting point on the windshield becomes a different reflecting point, which is difficult to correct. there were. Here, FIG. 5A is a schematic configuration diagram for explaining the reflection point of the central optical axis of each eye point in the arrangement, FIG. 5B is an enlarged view of a portion T in FIG. 5A, and FIG. It is a figure which shows the reflective point in the reflective surface of a reflective mirror.

As shown in FIGS. 5A to 5C, in the reflection mirror 4 that rotates about the rotation shaft 6 provided at the center thereof, the eye points IU, IM. When the cross point of the central optical axes LU, LM, and LL corresponding to each of the ILs is set near the center of the reflection surface 4a of the reflection mirror 4, the reflection points D ₂ , E ₂ , and F ₂ are reflected on the reflection surface 4a. Thus, the same position in the vicinity of the center of the reflecting surface 4a is obtained, but the windshield 3 has different positions such as reflection points D ₀ , E ₀ , and F ₀ .

  Therefore, in order to suppress the distortion in the windshield 3 as described above, even if the reflection mirror 4 is formed as an aspherical mirror so as to cancel the distortion, the windshield 3 and the reflection mirror 4 can be adjusted by adjusting the display position. There is a further problem that it becomes difficult to suppress distortion by shifting the corresponding points on the reflecting surface 4a.

  Therefore, in view of the above-described problems, an object of the present invention is to provide a vehicle display device that can adjust the position of a display image without causing display distortion.

  In order to solve the above-mentioned problem, the vehicle display device according to claim 1, wherein the display light of the image displayed on the display source is reflected by a reflection mirror on the projection area of the windshield of the vehicle, When the visual image of the image projected on the projection area and the foreground of the vehicle to be visually recognized through the windshield from the eyepoint of the vehicle are superimposed and visually recognized, the eyepoint of the vehicle is caused by the non-planarity of the windshield. In the vehicular display device using the reflection mirror formed so as to cancel the distortion generated in the image visually recognized from the display, the display light reflected at the reflection point of the reflection mirror corresponds to the reflection point in advance. Movement to move the reflecting mirror to reflect toward the eye point at a projection point of the defined projection area Further comprising a step, wherein said display light by the movement of said moving means is adapted to adjust the reflecting mirror so as to reflect toward the eye point.

  According to the vehicle display device of the present invention described in claim 1 above, the display light from the display source reflected by the reflection point of the reflection mirror is previously generated on the projection area of the windshield corresponding to the reflection point. The reflection mirror is moved by the moving means so as to be reflected at a predetermined projection point. The reflection mirror is adjusted at a suitable reflection angle at a position suitable for the eye point in the eye range of the vehicle corresponding to the driver by the movement of the reflection mirror by the moving means. The display light from the display source reflected by the reflection mirror adjusted in this way is reflected by the corresponding projection point in the projection area and reaches the eye point.

  In order to solve the above-mentioned problems, a second aspect of the present invention is the vehicle display device according to the first aspect, wherein the moving means is a rotating shaft provided away from the reflecting surface of the reflecting mirror. The reflection mirror is moved by rotating around the axis.

  According to the vehicle display device of the present invention described in claim 2, when the reflecting mirror is moved by the moving means, the reflecting mirror moves on the circumference around the rotation axis.

  As described above, according to the vehicle display device of the first aspect of the present invention, the projection of the windshield in which the light from the display source reflected at the reflection point of the reflection mirror corresponds to the reflection point on the reflection mirror. Since the moving means for moving the reflecting mirror to reflect at a predetermined projection point on the area is provided and the reflecting mirror is moved by this moving means to adjust the reflection angle of the reflecting mirror, the windshield Even if the shape of the reflection mirror is designed by making the reflection point of the reflection mirror correspond to each projection point on the projection area in order to correct distortion in the projection area, the correspondence between the projection point and the reflection point is not shifted. Since the reflection angle of the reflecting mirror is adjusted, distortion in the projection area can be reliably corrected without increasing the size of the apparatus. Therefore, there is an effect that distortion suppression design for each eye point in the vehicle can be performed more easily than in the past.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, the reflection mirror is moved up and down on the circumference around the rotation axis. Therefore, it is possible to make the design for suppressing distortion in the projection area much easier.

  Hereinafter, an embodiment of a display device for a vehicle according to the present invention will be described with reference to the drawings of FIGS. In addition, the same code | symbol is attached | subjected to the part which is the same as that of what was demonstrated in the prior art, or the detailed description is abbreviate | omitted.

  1A is a schematic configuration diagram of a vehicle display device according to the present invention, FIG. 1B is an enlarged view of a part S in FIG. 1A, and FIG. 1C is a reflection on a reflecting surface of a reflecting mirror in FIG. FIG. 2 is a perspective view of the vehicle display device shown in FIG. 1, and FIG. 3 is a diagram for explaining the operation of the reflecting mirror and stopper in FIG.

  As shown in FIGS. 1 to 3, in the present invention, the display light of the image displayed on the display source 5 is reflected on the projection area E of the windshield 3 of the vehicle by the reflection mirror 4 and projected onto the projection area E. When the virtual image of the image and the foreground of the vehicle to be visually recognized through the windshield 3 from the eyepoints IU, IM, and IL of the vehicle are superimposed and visually recognized, the vehicle is caused by the non-planarity of the windshield 3 In the vehicular display device 10 using the reflection mirror 4 formed so as to cancel the distortion generated in the image viewed from the eye points IU, IM, and IL, the reflection point D1 / E1 / F1 of the reflection mirror 4 is The reflected display light is reflected at reflection points D0 / E0 / F0 of the projection area E that are determined in advance corresponding to the reflection points D1 / E1 / F1. A moving means for moving the reflecting mirror, and adjusting the reflecting mirror 4 so that the display light is reflected toward the eye points IU, IM, IL by the movement of the moving means. Features.

  Further, the moving means is characterized in that the reflecting mirror 4 is moved by rotating around a rotating shaft 6 provided away from the reflecting surface side of the reflecting mirror 4. And about the position which provides the rotating shaft 6, the display light reflected by the some reflective point D1 / E1 / F1 on the reflective surface 4a of the reflective mirror 4 reflects in the reflective point D0 / E0 / F0 of the projection area E. FIG. The position of the reflection mirror 4 is obtained by, for example, simulation, experiment, etc., and the reflection mirror 4 is set so as to move along the locus traced.

  In the vehicular display device 10 that realizes the above-described configuration, the display source 5 is disposed at the center of the case body 11 having an opening at the top, and the reflection mirror 4 is disposed so as to face the display source 5. And the cover 41 is attached to the upper surface (opposite side of the reflective surface 4a) of the reflective mirror 4, A pair of extended from the attachment surface (the reflective surface side of the reflective mirror 4) of the reflective mirror 4 of the cover 41 is provided. The leg portion 42 is provided so as to be rotatable with respect to the rotation shaft 6.

  In the best mode, the case where the mirror unit is configured as the mirror unit having the reflecting mirror 4, the cover 41, and the leg portion 42 will be described. However, the present invention is not limited to this, and for example, the configuration of the mirror unit is described. For example, the cover 41 may be removed and the legs 42 may be directly attached to the reflection mirror 4.

  Further, a U-shaped frame 7 is fixed to the rotating shaft 6 so as to rotate together with the rotating shaft 6, and this U-shaped frame 7 contacts a frame stopper 13 provided in the case main body 11. When in contact, the rotation of the rotation shaft 6 in the opening direction Y of the reflection mirror 4 is prevented. Thus, the rotation range in the opening direction of the rotation shaft 6 and the U-shaped frame 7 is defined by the frame stopper 13. Further, the U-shaped frame 7 is configured to rotate the leg portion 42 of the mirror unit according to the rotation through an urging member 8 described later.

  A gear 121 is fixed to the end of one rotating shaft 6, and the output of the motor 122 is transmitted to the gear 121 via the gear group 123. Then, the driving of the motor 123 is controlled by a control unit (not shown), and the rotation shaft 6 is rotated in a direction corresponding to the output of the motor 123. Thus, in this best mode, in order to describe the case of the reflection mirror 4 provided so as to be able to stand up and tilt with respect to the instrument panel 1 of the vehicle, the reflection mirror 4 having the gear 121, the motor 122, and the gear group 123 is described. Although the opening / closing mechanism 12 is provided, the opening / closing mechanism 12 is omitted from the configuration when it is not necessary to open / close the reflecting mirror 4.

  Further, a stopper mechanism 14 for defining the reflection angle, position, etc. of the reflection mirror 4 is provided in the case body 11 on the other rotating shaft 6 side. As shown in FIG. 3, the stopper mechanism 14 has a predetermined reflecting mirror 4 that moves together with the U-shaped frame 7 in accordance with the movement of the U-shaped frame 7 in the opening direction Y (standing position). A stopper 141 is provided that contacts the U-shaped frame 7 to prevent the reflection mirror 4 from moving when the reflection angle is reached.

  The stopper mechanism 14 further includes a stopper motor 142 that moves the stopper 141 in the closing direction X or the opening direction Y in FIG. 3, and a conversion gear 143 that transmits the output of the stopper motor 142 to the stopper 141. The output of the stopper motor 142 by the control unit (not shown) is converted by the conversion gear 143 into the closing direction X or the opening direction Y and transmitted to the stopper 141, and the stopper 141 moves in the closing direction X or the opening direction Y. The position of the stopper 141 is stored as an adjustment angle of the stopper mechanism 14, and the reflection mirror 4 can be set to the adjustment angle even if the U-shaped frame 7 is moved thereafter.

  Further, a biasing member 8 such as a tension spring that biases the reflection mirror 4 in the opening direction Y is provided between the U-shaped frame 7 and the leg portion 42 of the reflection mirror 4. By this urging member 8, the stopper mechanism 14 has a structure in which only the mirror unit such as the reflection mirror 4 can be adjusted without being affected by the operation of the U-shaped frame 7. Further, since the mirror unit can be pressed against the rotating shaft 6 by the urging member 8, it is possible to prevent the rattling from being caused by the vibration of the vehicle.

  When the stopper 141 moves in the closing direction X, the reflection mirror 4 rotates in the closing direction X with the rotation shaft 6 as the rotation center. When the stopper 141 moves in the opening direction Y, the reflecting mirror 4 moves in the opening direction Y around the rotation shaft 6 by the urging force of the urging member 8. As described above, the rotation (movement) range of the reflection mirror 4 corresponds to the movement range of the stopper 141. And by changing the length of the leg part 42 which comprises a mirror unit according to the movement path | route of the reflective mirror 4, it can respond to the windshield 3 of various shapes.

  Accordingly, since the reflecting mirror 4 is rotated (moved) about the rotation shaft 6 by the stopper mechanism 14, the moving means has the rotation shaft 6 and the stopper mechanism 14 in the best mode. It has a configuration.

  In the present best mode, a mode in which the reflecting mirror 4 is rotated around the rotation shaft 6 will be described. However, the present invention is not limited to this, and the shape of the windshield 3 and the vehicle display device 10 are not limited thereto. If the reflecting mirror 4 cannot be moved according to the trajectory by rotating the reflecting mirror 4 depending on the position where the reflecting mirror 4 is provided, etc., by other moving means such as a slide mechanism for sliding the reflecting mirror 4 corresponding to the moving path of the reflecting mirror I try to deal with it.

  Next, an example of the operation (action) related to the angle adjustment of the reflection mirror 4 in the vehicle display device having the above-described configuration will be described below.

  The vehicular display device 10 is rotated in the opening direction Y in accordance with the driving by the opening / closing mechanism 12 and abuts against the frame stopper 13 to stand. At this time, the reflecting mirror 4 rotated together with the U-shaped frame 7 stops when the cover 41 comes into contact with the stopper 141 of the stopper mechanism 14. Therefore, the reflecting mirror 4 is set at a position that is a predetermined angle determined in advance by the stopper 141.

  As shown in FIG. 1B, the eye point corresponding to the center of the eye range IR is changed by the driver while the reflecting mirror 4 of the vehicle display device 10 is set to correspond to the eye point IM. When the eye point IU corresponding to the upper limit is changed from IM, the stopper 141 of the stopper mechanism 14 is moved in the closing direction X by operating a switch corresponding to the closing direction X of the operation panel (not shown). The reflection mirror 4 is rotated (moved) about the rotation axis 6 in the closing direction X.

The optical axis LU from the display source 5 is reflected in the vicinity of the reflection point D _{1 on} the reflection surface 4a of the reflection mirror 4 and in the vicinity of the projection point D ₀ on the projection area E of the windshield 3 corresponding to the reflection point D _1. When the reflecting mirror 4 is rotated to a position where the virtual image is projected, distortion of the virtual image projected onto the projection area E is suppressed. Therefore, when the driver stops the switch operation at that time, the reflection mirror 4 is moved to a position where the projection point D ₀ and the reflection point D ₁ do not deviate from each other. Therefore, in the projection area E with respect to the eye point IU. Distortion can be reliably corrected.

  Further, in a state where the reflection mirror 4 of the vehicle display device 10 is set to correspond to the eye point IM, the eye corresponding to the lower limit of the eye point IM corresponding to the center of the eye range IR is changed by the driver. When the point IL is changed, when the switch corresponding to the opening direction Y of the operation panel (not shown) is operated, and the stopper 141 of the stopper mechanism 14 is moved in the opening direction Y, the biasing force of the biasing member 8 Thus, the reflection mirror 4 is rotated (moved) about the rotation axis 6 in the opening direction Y.

The optical axis LL from the display source 5 is reflected near the reflection point F _{1 on} the reflection surface 4 a of the reflection mirror 4 and near the projection point F ₀ on the projection area E of the windshield 3 corresponding to the reflection point F _1. When the reflecting mirror 4 is rotated to the position where the image is projected, distortion of the display image projected onto the projection area E is suppressed. Therefore, since the driver stops the switch operation at that time, the reflection mirror 4 is moved to a position where the projection point F ₀ and the reflection point F ₁ do not deviate. The distortion in the area E can be reliably corrected.

As described above, according to the vehicle display device 10 of the present invention, the light from the display source 5 reflected by the reflection points D ₁ , E ₁ and F ₁ of the reflection mirror 4 is reflected on the reflection mirror 4. Is provided with a moving means for moving the reflecting mirror 4 so as to reflect at predetermined projection points D ₀ , E ₀ , F ₀ on the projection area E of the windshield 3 corresponding to. Since the reflection angle of the reflection mirror 4 is adjusted by moving the reflection mirror 4, the reflection at the projection points D ₀ , E ₀ , and F ₀ on the projection area E is performed in order to correct distortion in the projection area E of the windshield 3. Even if the shape of the reflection mirror 4 is designed by making the reflection points D ₁ , E ₁ , F ₁ of the mirror 4 correspond to each other, the projection points D ₀ , E ₀ , F ₀ and the reflection points D ₁ , E ₁ , F ₁ The reflection angle of the reflection mirror 4 can be changed without shifting the correspondence of To be integer, without increasing the size of the apparatus, it is possible to reliably correct the distortion in the projection area E. Therefore, there is an effect that the distortion suppression design for each eye point IU, IM, IL in the vehicle can be performed more easily than in the past.

  Further, since the reflecting mirror 4 is moved in the vertical direction on the circumference around the rotating shaft 6, the moving range of the reflecting mirror 4 is integrated with the rotating shaft behind the conventional reflecting mirror. Therefore, the distortion suppression design in the projection area E can be further facilitated.

  In the present embodiment, the case where attention is paid to the optical axes LU, LM, and LL corresponding to the centers of the eye points IU, IM, and IL has been described. However, the present invention is not limited to this, and FIG. As shown in (a), it is possible to adopt various forms such as designing a moving path for rotating the reflecting mirror 4 by paying attention to the optical axis corresponding to each upper limit or lower limit.

  Further, in the above-described best mode, the case where the reflection mirror 4 is housed in the instrument panel 1 has been described. However, the present invention is not limited to this, and a part of the reflection mirror 4 is part of the instrument panel 1. The present invention can also be applied to a vehicular display device that protrudes outward from the opening.

(A) is a schematic block diagram of the display apparatus for vehicles which concerns on this invention, (b) is an enlarged view of the part S in (a), (c) is a reflective point in the reflective surface of the reflective mirror in (b). It is a perspective view shown. It is a perspective view of the display apparatus for vehicles shown in FIG. It is a figure for demonstrating operation | movement of the reflective mirror and stopper in FIG. (A), (b) is a figure which respectively shows the schematic structure for demonstrating the reflective point of the light ray corresponding to the windshield and aspherical mirror in the center of an eye-range, and the reflective point in the reflective surface of an aspherical mirror. (A) is a schematic block diagram for explaining the reflection point of the central optical axis of each eye point in the arrangement, (b) is an enlarged view of a portion T in (a), and (c) is a reflection surface of a reflection mirror. It is a figure which shows the reflective point in.

Explanation of symbols

3 Windshield 4 Reflecting mirror 5 Light source 6 Rotating axis D ₀ , E ₀ , F ₀ Projection point D ₁ , E ₁ , F ₁ Reflection point IU, IM, IL Eye point

Claims (2)

The display light of the image displayed on the display source is reflected on the projection area of the windshield of the vehicle by a reflection mirror, and is visually recognized through the windshield from the virtual image of the image projected on the projection area and the eyepoint of the vehicle. A vehicle using the reflection mirror formed so as to cancel distortion generated in the image viewed from the eye point of the vehicle due to the non-planarity of the windshield in overseeing the foreground of the vehicle to be superimposed Display device,
Movement for moving the reflection mirror so that the display light reflected at the reflection point of the reflection mirror is reflected toward the eye point at a projection point of the projection area that is predetermined corresponding to the reflection point Further comprising means,
The vehicle display device, wherein the reflection mirror is adjusted so that the display light is reflected toward the eye point by the movement of the moving means. 2. The vehicle according to claim 1, wherein the moving unit moves the reflecting mirror by turning about a turning shaft provided on the reflecting surface side of the reflecting mirror. 3. Display device.

Images