JP4864641B2 - Vehicle display device - Google Patents

Description

  The present invention relates to a reflective display device for a vehicle provided on an instrument panel of a vehicle.

  Conventionally, a reflection-type vehicle display device provided on an instrument panel of a vehicle is known.

  In FIG. 1, 1 is an instrument panel of a vehicle, 2 is a vehicle information display unit, 2 a is a translucent cover of the vehicle information display unit 2, and 3 is a vehicle display device of this conventional example that constitutes the vehicle information display unit 2. is there.

  The vehicle information display unit 2 displays information about the vehicle such as the speed of the vehicle and the rotational speed of the engine.

  The vehicle display device 3 is provided on the instrument panel 1 and is located on the back side of the translucent cover 2a.

  The vehicle display device 3 is mainly made of resin, and includes a housing 4, a display device unit 5, and a reflecting mirror unit 6 as shown in FIG.

  The housing 4 has openings in the vehicle front-rear direction.

  A display device section 5 is provided on the lower wall 4a on the vehicle rear side of the casing 4, and a reflecting mirror section 6 is provided on the vehicle front side so as to close the opening.

  The reflecting mirror portion 6 has a shape that forms a part of a concave mirror, and has a reflecting surface on the vehicle rear side.

  The reflecting mirror unit 6 is disposed on the vehicle front side facing the display device unit 5, and the display device unit 5 is located on the optical axis of the reflecting mirror unit 6.

  As shown in FIG. 2B, the external appearance of the display device unit 5 has a substantially rectangular parallelepiped shape.

  A display body 7 having a substantially rectangular shape in plan view is provided on the vehicle front side of the display unit 5.

  The display body 7 is composed of a flexible organic EL display device, and the organic EL display device itself emits light.

  The display body 7 has a substantially rectangular display area 7a, and information on the vehicle such as the speed and the rotational speed is displayed on the display area 7a based on a signal sent from a control unit (not shown). .

  The light displayed in the display area 7a is reflected by the reflecting mirror unit 6 and enlarged and displayed as a virtual image for the vehicle occupant.

  Therefore, the occupant can view the vehicle information such as the speed and the engine speed by looking at the vehicle information display unit 2.

  The display body 7 of the conventional example is curved in a direction along the longitudinal direction of the display area 7 a following the shape of the reflecting surface of the reflecting mirror section 6.

  The reflecting mirror part 6 and the display body 7 are arranged such that the center of curvature of the reflecting mirror part 6 is positioned on the center of curvature of the display body 7.

  For this reason, even if the display of the display area 7a is enlarged or reduced, the distance (shortest distance) between the reflecting mirror section 6 and the display area 7a is substantially equal to each point on the display area 7a. Therefore, as shown in FIG. 4 (a), the image 7b of the display area 7a viewed from the occupant has little distortion and is substantially rectangular and looks good.

In addition, a reflective display device for a vehicle that displays display information without using a half mirror or the like is known (see Patent Document 1).
JP 2000-52812 A

  By the way, the vehicular display device 3 has a fixed enlargement rate of the display area 7a by the reflecting mirror unit 6. If the enlargement rate can be changed, for example, the vehicular display device 3 is mounted. Even if the vehicle type differs, it is not necessary to prepare the vehicle display device 3 designed and manufactured by changing the enlargement ratio for each vehicle type, and the device to be manufactured can be unified.

  However, in the vehicle display device 3 of the conventional example, if the display device unit 5 is simply moved away from the reflecting mirror unit 6 in order to increase the display magnification, the image 7b of the display region 7a viewed from the passenger is as shown in FIG. As shown in (b), it is distorted in a substantially pincushion shape.

  Further, if the display device unit 5 is simply moved closer to the reflecting mirror unit 6 in order to reduce the display magnification, an image 7b of the display area 7a viewed from the passenger is substantially barrel-shaped as shown in FIG. The shape will be distorted.

  Based on the conceptual diagrams of FIGS. 3A to 3D, the cause of this distortion will be described.

  In FIG. 3A to FIG. 3D, 6 ′ is a concave mirror corresponding to the reflecting mirror section 6, and 7 a ′ is a display surface corresponding to the display area 7 a.

  L is the optical axis of the concave mirror 6 ', C is the center of curvature of the concave mirror 6', F is the focal point of the concave mirror 6 ', Q, R, R', Q 'are the corners of the display surface 7a', and P is the display surface 7a ′ represents the center point.

  As shown in FIGS. 3B to 3D, in the vehicle display device 3, the display surface 7a ′ is located on the concave mirror 6 ′ side with respect to the focal point F. Therefore, the display surface 7a by the concave mirror 6 ′ is used. The image of 'becomes a virtual image.

  In general, with respect to the radius of curvature R of the concave mirror, the focal length f of the concave mirror is given by f = R / 2, where the distance between the object (light source) and the concave mirror is a, and the magnification of the image by the concave mirror is m, m is , M = f / | a−f |.

  That is, the magnification of the image increases as the object (light source) approaches the focal point. In particular, in the range of a <f, the magnification of the image increases as the object (light source) moves away from the concave mirror.

As shown in FIG. 3 (b), in the vehicle display device 3 of the conventional example, the center of curvature C of the concave mirror 6 ′ and the center of curvature C ′ of the display surface 7a ′ coincide, and each corner Q, Since the distance a ₂ between R, R ′, Q ′ and the concave mirror 6 ′ is substantially equal to the distance a ₁ between the center point P and the concave mirror 6 ′, the image of the corners Q, R, R ′, Q ′ The magnification is substantially equal to the magnification of the image at the center point P.

  For this reason, the vicinity of the center of the display area 7a and the vicinity of the corner of the display area 7a are enlarged substantially uniformly, and the image 7b of the display area 7a has upper and lower contour lines as shown in FIG. It becomes a substantially rectangular shape without bending.

However, as shown in FIG. 3C, when the display surface 7a ′ is brought close to the concave mirror 6 ′ in order to reduce the display magnification, the distance a ₁ between the concave mirror 6 ′ and the center point P of the display surface 7a ′ is obtained. Since the distance a ₂ between the concave mirror 6 ′ and the corner portion of the display surface 7a ′ is increased, the magnification of the image near the corner portions Q, R, R ′, Q ′ is changed to an image near the center portion of the display surface 7a ′. As a result, the image on the display surface 7a 'is distorted in a substantially pincushion shape as shown in FIG. 4B.

  That is, when the center of curvature C 'of the display surface 7a' moves to the concave mirror 6 'side from the center of curvature C of the concave mirror 6', the image 7b of the display area 7a is distorted into a substantially pincushion shape.

  As shown in FIG. 3D, when the display surface 7a ′ is moved away from the concave mirror 6 ′ in order to increase the display magnification, the concave mirror is determined from the distance a1 between the concave mirror 6 ′ and the center point P of the display surface 7a ′. Since the distance a2 between 6 ′ and the corner portion of the display surface 7a ′ is closer, the magnification of the image near the corner portions Q, R, R ′, and Q ′ is larger than the image near the center portion of the display surface 7a ′. As shown in FIG. 4C, the image of the display surface 7a ′ is distorted into a substantially barrel shape.

  That is, when the center of curvature C 'of the display surface 7a' moves to the focal point F side from the center of curvature C of the concave mirror 6 ', the image 7b of the display area 7a is distorted into a substantially barrel shape.

  Therefore, an object of the present invention is to provide a reflective vehicle display device in which a display image is not distorted even when the magnification of the display image is changed by moving the display body closer to or away from the concave mirror.

In order to achieve the above object, the invention described in claim 1 includes a display device section having a flexible display body for displaying information on a vehicle in a display area having a substantially rectangular shape in plan view, and the display device section. A concave mirror portion with a fixed shape that reflects the light that is positioned on the front side of the vehicle and that is displayed on the display area so as to be enlarged and displayed to an occupant of the vehicle. a vehicle display device provided in the instrument panel, the display body movable mechanism that can move along the display body in the direction of the optical axis of the concave mirror portion, curved following the reflection surface shape of the concave surface mirror portion the curved shape of the display body has, the had accompanied the movement of the display body, the said optical axis in the longitudinal direction of the ends of the display body according to the distance between the display body and the concave mirror surface portion which changes due to the movement Bend in the direction, the center of the display surface and the The center of curvature of the display body is matched with the center of curvature of the concave mirror part by making the distance between the surface mirror and the distance between the longitudinal end of the display body and the concave mirror equal. And a curvature adjusting mechanism.

According to a second aspect of the present invention, the curvature adjusting mechanism holds the display body, and a cam portion that extends in the optical axis direction of the concave mirror portion and is opposed to each other across the optical axis. A display body movable frame that supports a central portion in the longitudinal direction of the display body and is capable of moving the display body in the optical axis direction; and the cam portions provided at both ends in the longitudinal direction of the display body movable frame. The cam follower part which changes the curvature of the curvature of the said display body by pressing the longitudinal direction both ends of the said display body and following the shape of this, and curving the said display body is comprised. The vehicle display device is characterized.

  According to the first or second aspect of the present invention configured as described above, the display body has a display body movable mechanism that enables the display body to move along the optical axis direction of the concave mirror portion. The enlargement ratio of the image in the displayed area can be changed.

  Moreover, since it has a curvature adjustment mechanism that matches the center of curvature of the display body and the center of curvature of the concave mirror part, even if the magnification of the display area is changed, the reflection surface of the concave mirror part and the display area of the display body Since the distance is almost equal to each point on the display area and the magnification is almost equal to each point on the display area, the image of the display area viewed from the passenger is less distorted and looks good.

  Hereinafter, the present invention will be described based on examples of embodiments according to the present invention.

<Constitution>
In FIG. 5, 11 is a vehicle instrument panel, 12 is a vehicle information display unit, 12 a is a translucent cover of the vehicle information display unit 12, and 13 is a vehicle display device of this embodiment that constitutes the vehicle information display unit 12. is there.

  The vehicle information display unit 12 displays information about the vehicle such as the vehicle speed and the engine speed.

  The vehicle display device 13 is provided on the instrument panel 11 and is located on the back side of the translucent cover 12a.

  The vehicle display device 13 is mainly made of resin, and includes a housing 14, a display device unit 15, and a reflecting mirror unit 16 as shown in FIG.

  The casing 14 has openings in the vehicle front-rear direction.

  A display device portion 15 is provided on the lower wall 14a on the vehicle rear side of the housing 14, and a reflecting mirror portion 16 is provided on the vehicle front side so as to close the opening.

  The reflecting mirror portion 16 has a shape that forms a part of a concave mirror, and has a reflecting surface on the vehicle rear side.

  The reflecting mirror part 16 is located on the vehicle front side facing the display device part 15, and the display device part 15 is located on the optical axis of the reflecting mirror part 16.

  As shown in FIG. 6B, the display device unit 15 includes a housing 17 and a lid 18, and a window portion 17 a is provided on the vehicle front side of the housing 17.

  As shown in FIG. 7, a movable frame body 19 is provided inside the display device section 15, and the movable frame body 19 is movable along the optical axis direction of the reflecting mirror section 16 shown in FIG. It has become.

  A display body 20 is held on the movable frame body 19.

  The display body 20 is composed of a flexible organic EL display device, and the organic EL display device itself emits light.

  As shown in FIG. 8, the display body 20 has a display area 20a having a substantially rectangular shape in plan view, and the display area 20a has a speed and a rotational speed based on a signal sent from a control unit (not shown). Information about the vehicle such as is displayed.

  The light displayed in the display area 20a is reflected by the reflecting mirror unit 16 shown in FIG. 6 and enlarged and displayed as a virtual image for the vehicle occupant.

  Therefore, the occupant can view the vehicle information such as the speed and the engine speed by looking at the vehicle information display unit 12.

  As shown in FIG. 7, the housing 17 of the display device unit 15 includes a bottom wall 17b, a front side wall 17c, and side walls 17d and 17d.

  The front side wall 17 c is curved along the longitudinal direction corresponding to the reflecting surface of the reflecting mirror portion 16.

  Sliding grooves 17e and 17e are provided on the inner side surfaces of the side walls 17d and 17d so as to face each other at a substantially central position in the vertical direction.

  Cam portions 21 and 21 extend inward facing the upper portions of the sliding grooves 17e and 17e.

  The cam portions 21 and 21 have cam surfaces 21a and 21a facing each other, and the cam surfaces 21a and 21a have curved surfaces that gradually approach each other as the distance from the front side wall 17c increases.

  As shown in FIG. 8, the movable frame 19 is constituted by a frame body 22 and a substantially arcuate support portion 23.

  The frame body 22 includes a bottom wall 22a, a rear end wall 22b, side walls 22c and 22c, and a front end wall 22d.

  The front end wall 22 d is provided with a notch 22 e that faces the window 17 a of the display device 15 and exposes the display area 20 a of the display body 20.

  A receiving space 22g for receiving the display body 20 is formed by the bottom wall 22a, the rear end wall 22b, the side walls 22c and 22c, and the front end wall 22d.

  The rear end wall 22b and the front end wall 22d are curved along the longitudinal direction corresponding to the reflecting surface of the reflecting mirror portion 16, and the curvature radius of the rear end wall 22b is smaller than the curvature radius of the front end wall 22d. .

  Therefore, in the receiving space 22g, both end portions in the longitudinal direction of the frame body 22 are wider in the optical axis direction than the central portion in the longitudinal direction.

  As shown in FIG. 9A or 9B, when the display body 20 is stored in the receiving space 22g of the frame body 22 and the support portion 23 is attached, the longitudinal center 20C of the display body 20 is It is supported by the central portion 22bC of the end wall 22b and the central portion 23C of the support portion 23.

  On the other hand, in the receiving space 22g, both end portions in the longitudinal direction of the frame body 22 are wider in the optical axis direction than the central portion in the longitudinal direction. Therefore, both longitudinal end portions 20E and 20E of the display body 20 are in the optical axis direction. Can be bent.

  As shown in FIG. 8, sliding ribs 22 f and 22 f extend in the optical axis direction on the outer surfaces of the side walls 22 c and 22 c of the frame body 22.

  The sliding ribs 22f and 22f are slidably fitted in sliding grooves 17e and 17e provided on the inner side surfaces of the side walls 17d and 17d, respectively.

  For this reason, the movable frame 19 is movable in the optical axis direction.

  Bearing portions 23 a and 23 a are provided in the vicinity of both sides in the longitudinal direction of the front end surface of the support portion 23.

  Cam follower portions 24 and 24 are rotatably attached to the bearing portions 23a and 23a, respectively.

  The cam follower part 24 is comprised by the plate part 24a, the rotating shaft 24b, the display body press rod 24c, and the roller part 24d.

  The plate portion 24a is substantially L-shaped, and a rotating shaft 24b extends downward from a corner portion of the plate portion 24a.

  The display body pressing rod 24c extends downward from one end of the plate portion 24a, and the roller portion 24d is provided on the upper end of the other end of the plate portion 24a.

  The roller portions 24d and 24d abut against the cam surfaces 21a and 21a of the cam portions 21 and 21, and when the movable frame 19 is moved in the optical axis direction, the roller portions 24d and 24d are brought into contact with the cam surfaces 21a and 21a. It rolls while abutting.

<Function and effect>
As shown in FIG. 9, the roller portions 24d and 24d are in contact with the cam surfaces 21a and 21a of the cam portions 21 and 21, and when the movable frame body 19 is moved in the optical axis direction, the roller portions 24d and 24d. Rolls in contact with the cam surfaces 21a and 21a, respectively.

  When the movable frame body 19 is moved away from the window portion 17a, the roller portions 24d and 24d follow the shapes of the cam portions 21 and 21, respectively, and rotate the cam follower portions 24 and 24, thereby the cam follower portions 24 and 24. The display body pressing rods 24c and 24c press the longitudinal ends 20E and 20E of the display body 20 from the front end face side.

  At this time, in the receiving space 22g, both longitudinal ends of the display body 20 are wider in the optical axis direction than the longitudinal central portion, and the central portion 20C of the display body 20 is connected to the central portion 23C and the rear end of the support portion 23. Since it is supported between the central portion 22bC of the wall 22b, both end portions 20E and 20E of the display body 20 are curved backward.

  The amount of bending (the curvature of the reflecting mirror portion) increases with the amount of movement as the movable frame body 19 moves away from the window portion 17a.

  Further, when the movable frame body 19 is brought closer to the window portion 17a, the pressing of the roller portions 24d and 24d is gradually released, and the pressing of the display body pressing rods 24c and 24c to the both ends 20E and 20E of the display body 20 is also gradually performed. The display body 20 is released, and the display body 20 returns to the shape before pressing due to the elasticity of the display body 20 itself.

  By appropriately adjusting the shapes of the opposed cam surfaces 21a and 21a, the curvature of the display body 20 can be changed to a desired curvature according to the amount of movement of the movable frame body 19.

   In the vehicle display device 13 of the present invention, even if the movable frame body 19 is moved in the optical axis direction of the reflecting mirror section 16 in order to change the display magnification, the center of curvature of the display body 20 is always the center of curvature of the reflecting mirror section 16. The shapes of the opposed cam surfaces 21a and 21a are set so as to match.

  Based on the conceptual diagrams of FIG. 10A to FIG. 10D, the operational effects of the present embodiment will be described.

  10A to 10D, 16 'is a concave mirror corresponding to the reflecting mirror section 16, and 20a' is a display surface corresponding to the display area 20a.

  L ′ is the optical axis of the concave mirror 16 ′, C ″ is the center of curvature of the concave mirror 16 ′, F ′ is the focal point of the concave mirror 16 ′, and J, K, K ′, and J ′ are corners of the display surface 20a ′. Yes, and P ′ represents the center point of the display surface 20a ′.

  In the vehicle display device 13 of the present embodiment, as shown in FIGS. 10B to 10D, the display surface 20a ′ is positioned on the concave mirror 16 ′ side from the focal point F ′. The image of the display surface 20a by 'is a virtual image.

In the vehicle display device 13 of the present embodiment, the display surface 20a ′ may be moved from the position of the standard magnification display shown in FIG. 10B to the position of the reduction magnification display shown in FIG. Even if the display surface 20a ′ is moved to the position of the magnification display shown in FIG. 10D, the distance a ₂ between each corner J, K, K ′, J ′ of the display surface 20a ′ and the concave mirror 16 ′ is The magnification of the image at the corners J, K, K ′, and J ′ is substantially equal to the magnification of the image at the center point P, which is substantially equal to the distance a ₁ between the central point P ′ of the display surface 20a ′ and the concave mirror 16 ′. Are equal.

  Therefore, the standard magnification display image 20b shown in FIG. 11B, the reduction magnification display image 20b shown in FIG. 11A, and the enlargement magnification display image 20b shown in FIG. Becomes an almost rectangular image.

  As described above, since the display body moving mechanism that enables the display body 20 to move along the optical axis direction of the reflecting mirror section 16 is provided, the enlargement ratio of the image 20b of the display area 20a viewed from the passenger is changed. Can do.

  Moreover, since the curvature adjusting mechanism for matching the center of curvature of the display body 20 with the center of curvature C ″ of the reflecting mirror portion 16 is provided, the reflection of the reflecting mirror portion 16 can be achieved even if the enlargement ratio of the display region 20a is changed. The distance between the surface and the display area 20a of the display body 20 is substantially equal to each point on the display area 20a, and the magnification is substantially equal to each point on the display area 20a. The image 20b in the region 20a has a good appearance with little distortion.

  In general, the shape and size of the vehicle information display unit 12 are different depending on the vehicle type on which the vehicle display device 13 is mounted, and it is necessary to change the display magnification of the display body 20 for each vehicle type. If the vehicle display device 13 is used, the device can be used in common regardless of the vehicle type.

  Furthermore, since the size of the display body 20 can be reduced relative to the size of the display image that is actually displayed, it is possible to reduce the manufacturing cost of the display body 20 and to save power. .

  As mentioned above, although the Example of embodiment which concerns on this invention has been explained in full detail with reference to drawings, the concrete structure is not limited to this embodiment, and the design of the grade which does not deviate from the summary of this invention Modifications are included in the present invention.

  In this embodiment, an organic EL display is used as the display body 20, but the display body 20 is not limited to the organic EL display. For example, a plasma display may be used.

  In this embodiment, the combination meter display is used as an example of the display displayed by the display body 20, but the display is not limited to the combination meter. For example, a rear view monitor that displays the rear of the vehicle may be displayed.

It is a fragmentary perspective view of the instrument panel of the vehicle which concerns on a prior art example. (A) is a perspective view of the display apparatus for vehicles of a prior art example, (b) is the fragmentary perspective view of the display apparatus part seen from arrow A1 direction in (a). It is a conceptual diagram explaining the problem of a prior art example, (a) is a perspective view showing a concave mirror and a display surface, (b) is a top view at the time of standard magnification display seen from arrow A2 direction in (a). (C) is a top view when displaying a reduced magnification, and (d) is a top view when displaying an enlarged magnification. It is the conceptual diagram explaining the problem of a prior art example, (a) is the figure which looked at the image at the time of standard magnification display from the passenger | crew side, (b) is the figure which looked at the image at the time of reduction magnification display from the passenger side, c) is a view of an image at the time of magnification display as viewed from the passenger side. It is a fragmentary perspective view of the instrument panel of the vehicle concerning the present invention. (A) is a perspective view of the display apparatus for vehicles of the present invention, and (b) is a partial perspective view of the display device section seen from the direction of arrow A3 in (a). It is a disassembled perspective view which shows the internal structure of the display apparatus part which concerns on an Example. It is a disassembled perspective view of the movable frame which concerns on an Example. It is a top view of the display apparatus part which concerns on an Example, (b) is a figure of the state which moved the movable frame from the state of (a) to the arrow A4 direction. BRIEF DESCRIPTION OF THE DRAWINGS It is a conceptual diagram explaining the effect of the display apparatus for vehicles, (a) is a perspective view showing a concave mirror and a display surface, (b) is at the time of the standard magnification display seen from arrow A5 direction in (a). FIG. 4C is a top view, FIG. 4C is a top view when a reduced magnification is displayed, and FIG. 4D is a top view when an enlarged magnification is displayed. It is the figure which looked at the image of the display area from the passenger | crew side, (a) represents the image at the time of reduction magnification display, (b) represents the image at the time of standard magnification display, (c) is the image at the time of enlargement magnification display Represents.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Instrument panel 13 Display apparatus 15 for vehicles Display apparatus part 16 Reflective mirror part (concave mirror part)
19 Movable frame (display body movable frame)
20 Display body 20a Display area 20C Longitudinal center portion 20E of display body Both longitudinal end portions 21 of display body Cam portion 24 Cam follower portion C '' Center of curvature of display body, center of curvature of reflecting mirror portion (center of curvature of concave mirror portion) )

Claims (2)

A display unit having a flexible display for displaying information on the vehicle in a display area having a substantially rectangular shape in plan view;
A concave mirror portion with a fixed shape that is positioned on the front side of the vehicle facing the display device portion and reflects the light displayed in the display area to be displayed in an enlarged manner for the passenger of the vehicle. A vehicle display device provided on an instrument panel of the vehicle,
A display body movable mechanism capable of moving the display body along the optical axis direction of the concave mirror portion;
The curved shape of the display body which is curved following the reflection surface shape of the concave surface mirror portion, have accompanied the movement of the display body, in accordance with the distance between the display body and the concave mirror surface that changes by the mobile The both ends of the display body in the longitudinal direction are bent in the optical axis direction, and the distance between the central portion of the display surface and the concave mirror and the distance between the longitudinal end of the display body and the concave mirror A vehicular display device comprising: a curvature adjusting mechanism that makes the center of curvature of the display body coincide with the center of curvature of the concave mirror portion by equalizing the distance. The curvature adjusting mechanism extends in the optical axis direction of the concave mirror portion and is provided facing each other across the optical axis;
A display body movable frame that holds the display body, supports a central portion in the longitudinal direction of the display body, and allows the display body to move in the optical axis direction;
The curvature of the display body is provided by bending the display body by pressing the both ends in the longitudinal direction of the display body, following the shape of the cam portion, provided at both ends in the longitudinal direction of the display body movable frame. A cam follower that changes
The vehicle display device according to claim 1, comprising:

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