JP5953815B2 - Head-up display device - Google Patents

Description

  The present invention relates to a head-up display device.

  As a head-up display (HUD) device, for example, a device disclosed in Patent Document 1 is known. This HUD device includes a display, a reflecting mirror, and a combiner, and reflects light (display light) representing a display image on the display toward the combiner by the reflecting mirror, and the display image is displayed as a virtual image by the combiner. To make it visible. Such a HUD device is provided on a dashboard of a vehicle, for example, and allows a user who is mainly a driver to visually recognize display information such as a vehicle speed and a travel distance so as to be superimposed on a front landscape. It is configured as follows.

JP 2001-282132 A

  In the HUD device according to Patent Literature 1, the combiner is attached and fixed to a predetermined attached portion (the bracket 34 of the same literature) from the out-of-plane direction with an attachment screw. In this fixing method, the combiner is easily distorted because an out-of-plane force is applied to the combiner. Since the combiner is formed with a curved surface that collects display light, if the combiner is distorted, the virtual image of the display image is also distorted, and visibility is reduced. Further, in this fixing method, the combiner has to be configured to be thick to some extent in order to ensure strength against distortion.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a head-up display device having a structure in which the combiner is not easily distorted and the thickness of the combiner can be reduced.

In order to achieve the above object, a head-up display device according to the present invention includes a display unit that emits display light representing a display image;
A combiner having a curved surface that allows the viewer to visually recognize the display image by allowing the display light emitted from the display unit to enter and condensing the incident display light;
A mounted portion to which the combiner is mounted;
The combiner has a protruding portion that protrudes in the viewer side direction from one end thereof in a state where the viewer can visually recognize the display image .
Said protrusion, that is attached to the attached part from the direction perpendicular to the direction in which the projecting, said combiner, said mounted to the mounting portion,
A movable member having a predetermined axis; and a case body that houses the display unit and supports the movable member so as to be rotatable around the axis.
The attached portion is provided on the lower surface side of the movable member, and the attached portion is rotatable about the axis, whereby the combiner can be tilted to the viewer side. ,
It is characterized by that.

  According to the present invention, it is possible to provide a head-up display device having a structure in which the combiner is not easily distorted and the thickness of the combiner can be reduced.

It is a top view of the HUD device concerning a 1st embodiment of the present invention. It is a perspective view in the arrow A of the HUD apparatus shown in FIG. It is a BB schematic sectional drawing of the HUD apparatus shown in FIG. It is the front view and principal part sectional drawing of the HUD apparatus which concern on 2nd Embodiment. FIG. 5 is a schematic cross-sectional view of the HUD device shown in FIG. 4 taken along the line C-C, showing the HUD device in a state between an open state and a closed state. (A) And (b) is the DD line schematic sectional drawing of the HUD apparatus shown in FIG. 4, (a) is the figure which showed the open state of the combiner, (b) is a combiner's open state. It is the figure which showed the closed state.

  A HUD device according to an embodiment of the present invention will be described with reference to the drawings.

1. 1st Embodiment As shown in FIGS. 1-3, the HUD apparatus 1 which concerns on 1st Embodiment comprises the case body 10, the display part 20, the circuit board 30, the reflection part 40, and the combiner 50. Prepare.
The HUD device 1 is configured as, for example, a stationary HUD device that is mounted on a dashboard of a vehicle (for example, above an instrument panel). In the following description, the upper direction is “up”, the lower direction is “lower”, the front direction is “front”, and the rear direction is “rear” as viewed from the viewer 2 who views the display image displayed by the HUD device 1. (See the double-ended arrows in FIGS. 2 and 3) Each part of the HUD device will be described as appropriate.

  The case body 10 includes an upper case 11, a lower case 12, and an intermediate case 13. An opening 110 is formed in the upper case 11, and the upper case 11 and the lower case 12 are connected to form a shape like a box with an upper opening. The display unit 20, the circuit board 30, and the middle case 13 are accommodated in the box shape.

  The upper case 11 has a flat attached portion 111 that is a portion to which the combiner 50 is attached. The attached portion 111 is located at the front end portion (right end portion in FIG. 3) of the upper case 11, and the attached portion 111 has a screw hole H 1 corresponding to the screw S for attaching the combiner 50 to the upper case 11. Is formed. When the combiner 50 is attached to the attached portion 111, the combiner 50 looks like it extends upward from the upper case 11.

  An intermediate case 13 is placed on the lower case 12. The lower case 12 is formed with a recess 121 having a shape corresponding to the lower end of the reflecting portion 40. The reflective portion 40 is held by the concave portion 121 and a part of the inner case 13 (the inner surface on the rear side) (for example, the reflective portion 40 has one end inserted into the concave portion 121, and the rear surface is It is held by being fixed to the middle case 13 with an adhesive tape or the like).

  The middle case 13 is a substantially cylindrical member, and the display unit 20 is disposed on a part of the outer side surface (the right side in FIG. 3). The middle case 13 is formed with an emission port 130 that is a hole for exposing the display surface of the display unit 20. A transparent window member that covers the emission port 130 may be provided in the middle case 13.

  The display unit 20 emits display light L representing a display image for notifying display information such as vehicle speed and travel distance, and includes, for example, a transmissive liquid crystal display composed of a liquid crystal panel and a light source for backlight, Or it comprises a self-luminous display.

  The circuit board 30 is formed from a microcomputer, a graphic display controller (GDC), or the like including a CPU (Central Processing Unit) and a storage unit such as a ROM (Read Only Memory) on a plate-like base material made of a resin containing glass fiber. It is the printed circuit board which mounted the control part (not shown) comprised. For example, the circuit board 30 is fixed to the lower case 12 by an attachment member (not shown), and is located in front of the display unit 20 and between the upper case 11 and the lower case 12. The circuit board 30 and the display unit 20 are conductively connected via an FPC (Flexible Printed Circuit) 3. One end of the FPC 3 is connected to the circuit board 30 via the connector C. The control unit obtains vehicle state information transmitted through a communication line from an external device (not shown) such as a vehicle ECU (Electronic Control Unit) and drives the display unit 20 in response thereto (that is, the display unit). 20 to display a predetermined display image).

  The reflection unit 40 is located on the display side of the display unit 20, that is, on the emission side of the display light L, and reflects the reached display light L toward the combiner 50. The reflection part 40 is made of, for example, a resin molded product deposited with aluminum, and has a reflection surface configured as a curved surface that efficiently reflects the display light L from the display part 20 to the combiner 50 (in FIG. 3, reflection The surface is schematically represented as a plane). Further, as described above, the reflection portion 40 is held by the concave portion 121 and a part of the middle case 13 so that the reflection surface thereof is substantially opposed to the display surface of the display portion 20. The display light L emitted from the display unit 20 passes through the emission port 130 and reaches the reflection unit 40. Then, the display light L reflected by the reflection unit 40 passes through the opening 110 of the upper case 11 and travels toward the combiner 50.

  The combiner 50 includes a plate-shaped half mirror having a curved surface, a hologram element, and the like. The combiner 50 has a protruding portion 51 that protrudes in a direction other than the in-plane direction of the main surface of the combiner 50 (a surface substantially opposite to the reflecting surface of the reflecting portion 40) from one end portion (lower end portion) thereof.

  As shown in FIG. 3, the protruding portion 51 according to the present embodiment protrudes substantially in the out-of-plane direction of the main surface of the combiner 50, and specifically, the front side of the viewer 2 (the viewer with respect to the combiner 50. (Opposite to 2). As shown in FIG. 1, there are two protrusions 51, each of which has a hole H <b> 2 through which a screw S for attaching the combiner 50 to the case body 10 (upper case 11) is passed. The combiner 50 is attached to the attached portion 111 by screwing the screw S passed through the hole H2 of the protruding portion 51 into the screw hole H1 of the upper case 11 from above. That is, the combiner 50 is attached to the attached portion 111 by attaching the protruding portion 51 to the attached portion 111 of the upper case 11 from the direction orthogonal to the protruding direction (that is, the front) (from the upper side). ing.

  The combiner 50 attached as described above and fixed to the upper case 11 has its concave surface 50a substantially opposite to the reflective surface of the reflective portion 40. As shown in FIG. 3, the combiner 50 changes the optical path of the incident display light L after being reflected by the reflecting section 40 (if the half mirror is used as the combiner 50, the optical path of the display light L is changed by reflection, When a hologram element is used, the optical path of the display light L is changed by diffraction). The concave surface 50a of the combiner 50 has a function of condensing the display light L and is a curved surface that can form a virtual image farther forward (for example, about 1 m ahead of the combiner 50) than when the light is simply reflected. It is configured. The combiner 50 forms a virtual image of the display image at the front position F and transmits light from the front, whereby the HUD device 1 allows the viewer to view both the virtual image and the outside scene actually present in front. 2 can be visually recognized.

The HUD device 1 according to the first embodiment configured as described above includes a display unit 20 that emits display light L that represents a display image, and display light L that is emitted from the display unit 20 is incident thereon. The combiner 50 is provided with a combiner 50 having a curved surface that allows the viewer 2 to visually recognize the display image by condensing the light, and the attached portion 111 to which the combiner 50 is attached. The combiner 50 is combined from one end thereof. The projecting portion 51 projecting in a direction other than the in-plane direction is attached to the mounted portion 111 from the direction orthogonal to the projecting direction, so that the combiner 50 has the mounted portion. 111 is attached.
Thereby, it is avoided as much as possible that the force for fixing the combiner 50 to the attached portion 111 is applied in the out-of-plane direction (normal direction of the surface) of the combiner 50 (that is, the combiner 50 is applied in a direction in which the combiner 50 is easily distorted). Therefore, the combiner 50 is not easily distorted, and the display image L formed by the display light L being condensed by the combiner 50 is not easily distorted. Therefore, a reduction in visibility can be reduced as much as possible.
In addition, since the combiner 50 is not easily distorted, it is not necessary to form the combiner 50 thicker than necessary in order to ensure the strength against the distortion, and the thickness of the combiner 50 can be reduced. If the combiner 50 can be made thin, it is favorable from the viewpoint of weight reduction and cost, and the parallax due to the thickness of the combiner 50 can be reduced, so that the display image viewed by the viewer 2 looks double. It can be suppressed as much as possible to reduce visibility.

  In the HUD device 1 according to the first embodiment, the protruding portion 51 protrudes in a direction opposite to the viewer 2 of the display image.

2. Second Embodiment In the first embodiment, an example is shown in which the combiner 50 is fixed to the upper case 11 and is stationary. However, in the second embodiment, the combiner 50 is configured to be retractable (can be opened and closed). An example to which the present invention is applied will be described with reference to FIGS. 4 to 6A and 6B.
Hereinafter, the HUD device 1 ′ according to the second embodiment capable of storing the combiner will be described focusing on portions different from the first embodiment. In addition, each part which has the shape and function similar to 1st Embodiment is demonstrated using the code | symbol similar to 1st Embodiment.

The HUD device 1 ′ according to the second embodiment includes a case body 10 ′, a display unit 20, a circuit board 30 ′, a reflection unit 40, a combiner 50 ′, and a movable member 60. As in the first embodiment, the HUD device 1 ′ is configured as a stationary HUD device that is mounted on a dashboard of a vehicle.
In the following description, in the HUD device 1 ′, the state in which the combiner 50 ′ allows the viewer 2 to view the display image from the front is “open state” (see FIG. 6A), and the combiner 50 ′ is stored. The state is referred to as a “closed state” (see FIG. 6B).

  The case body 10 ′ includes an upper case 11 ′, a lower case 12 ′, and an intermediate case 13. In the second embodiment, the combiner 50 ′ is not fixed to the upper case 11 but is fixed to a flat attached portion 61 provided on the movable member 60. That is, the upper case 11 ′ according to the second embodiment is not provided with the attached portion 111 as in the first embodiment.

  The bearing portion 100 that rotatably supports the shaft portion 60a of the movable member 60 is configured by a part of the abutting portion between the upper case 11 'and the lower case 12'. Specifically, a right-side end portion in FIG. 4 of the lower case 12 ′ is provided with a standing portion 122 that stands upward, and in the upper case 11 ′, faces the standing portion 122 in the vertical direction. A shaft support recess 112 is provided at a position, and the bearing portion 100 that rotatably supports the shaft portion 60 a is configured by the upper surface of the standing portion 122 and the inner surface of the shaft support recess 112. Although not shown, in FIG. 4, the left end portion of the HUD device 1 ′ is similarly provided with an upright portion and a shaft support concave portion, both of which constitute a bearing portion. The upper case 11 ′ and the lower case 12 ′ are the same except that the upper case 11 ′ does not have a mounted portion and that the bearing portion 100 is constituted by a part of the upper case 11 ′ and the lower case 12 ′. The shape and function are the same as those of the upper case 11 and the lower case 12 according to the first embodiment.

  The circuit board 30 ′ includes a control unit (not shown) configured by a microcomputer including a CPU and a storage unit such as a ROM, a GDC, etc. This is a printed circuit board on which the electric motor 70 is mounted. The control unit obtains vehicle state information transmitted from an external device (not shown) such as a vehicle ECU through a communication line, and drives the display unit 20 in response thereto. Further, when an operation signal corresponding to a user input operation is supplied from an operation unit (not shown) provided in the HUD device 1 ′ or the like, the control unit drives the electric motor 70 based on the operation signal. . Specifically, the control unit rotates a rotation shaft 70a, which will be described later, of the electric motor 70 by a predetermined angle predetermined in the storage unit.

  The electric motor 70 is composed of a servo motor or the like, and has a rotating shaft 70a that rotates under the control of the control unit. A first gear G1 that is fastened to a second gear G2 described later is attached to the rotating shaft 70a (for example, the rotating shaft 70a is press-fitted into the first gear G1).

  The combiner 50 'is configured by a plate-shaped half mirror having a curved surface, a hologram element, or the like. Combiner 50 'has protrusion part 51' which protrudes in directions other than the in-plane direction of the main surface (surface substantially opposed to the reflective surface of the reflection part 40) from the one end part (lower edge part). . As shown in FIGS. 6A and 6B, the protruding portion 51 ′ according to the second embodiment protrudes substantially in the out-of-plane direction of the main surface of the combiner 50. Specifically, FIG. If it demonstrates in the "open state" shown in (4), it protrudes toward back (the viewer 2 side with respect to the combiner 50). As in the first embodiment, there are two protrusions 51 ′, each of which has a hole H <b> 2 ′ through which a screw S ′ for attaching the combiner 50 ′ to the movable member 60 is passed. If it demonstrates in the "open state" shown to Fig.6 (a), the screw S 'passed through hole H2' of protrusion part 51 'will be screwed by screw hole H1' of the movable member 60 from the lower side. Thus, the combiner 50 ′ is attached to the movable member 60 (attached portion 111 described later). That is, the combiner 50 ′ is attached to the attached portion 61 of the movable member 60 by attaching the protruding portion 51 ′ to the attached portion 61 of the movable member 60 from the direction orthogonal to the protruding direction (that is, the rear side). Is attached.

The combiner 50 ′ attached as described above and fixed to the movable member 60 has the concave surface 50 a ′ substantially opposed to the reflective surface of the reflective portion 40 in the “open state”.
As described with reference to FIG. 3 in the first embodiment, the combiner 50 ′ changes the optical path of the incident display light L after being reflected by the reflector 40. The concave surface 50a ′ of the combiner 50 ′ has a function of condensing the display light L, and is configured as a curved surface capable of forming a virtual image farther forward than when the light is simply reflected. Similarly to FIG. 3, the combiner 50 ′ forms a virtual image of the display image at its front position F and transmits light from the front, so that the HUD device 1 ′ actually exists in front of the virtual image. Both the outside scenery and the like can be visually recognized by the viewer 2.

  The movable member 60 is a plate-like member that extends in the left-right direction in FIG. 4 and has a shaft portion 60a that protrudes outward from the left and right ends thereof (in FIG. 4, only the right-side shaft portion 60a is shown). As described above, the shaft portion 60a is rotatably supported by the bearing portion 100. The movable member 60 has a flat attached portion 61 that is a portion to which the combiner 50 'is attached. If it demonstrates in the "open state" shown to Fig.6 (a), the to-be-attached part 61 will be provided in the lower surface side of the movable member 60, and it corresponds to the screw | thread S 'for attaching the combiner 50' to the to-be-attached part 61. A screw hole H1 ′ is formed. In the “open state”, the combiner 50 ′ is shaped to extend upward from the upper case 11.

  As shown in FIGS. 4 and 5, a second gear G2 that is fastened to the first gear G1 is provided below the movable member 60 (in FIG. 5, the first gear G1 and the first gear G1 are connected to the first gear G1). 2 with the two gears G2 and the respective meshing teeth are omitted). When the rotation shaft 70a of the electric motor 70 rotates under the control of the control unit, the first gear G1 rotates, and accordingly, the movable member 60 having the second gear G2 passes through the axial center of the shaft portion 60a. It rotates around the central axis AX.

  Here, the opening / closing operation of the combiner 50 'in the HUD device 1' will be described.

  The HUD device 1 ′ is provided with, for example, a button labeled OPEN / CLOSE as the operation unit. When the user presses the button in the “open state” shown in FIG. An operation signal for setting the state is supplied to the control unit. In response to the operation signal, the control unit rotates the rotation shaft 70a by the rotation angle necessary for storing the predetermined combiner 50 ', that is, rotates the first gear G1. The rotational power of the electric motor 70 is transmitted to the movable member 60 via the first gear G1 and the second gear G2, and the movable member 60 to which the combiner 50 'is fixed rotates around the central axis AX. As a result, the combiner 50 ′ falls and the HUD device 1 ′ is in the “closed state” shown in FIG. In the “closed state”, as shown in FIG. 6B, the combiner 50 ′ covers (closes) the opening 110 of the upper case 11 ′. In particular, in the second embodiment, the protrusion 51 ′ is configured to protrude rearward in the “open state”, and the protrusion 51 ′ is housed inside the case body 10 ′ in the “closed state”. Thus, the protruding portion 51 ′ is in a closed state and does not protrude from the case body 10 ′, and can be stored with good appearance.

  On the other hand, when the user presses the button in the “closed state” shown in FIG. 6B, an operation signal for opening the button is supplied to the control unit. In response to this operation signal, the control unit rotates the rotation shaft 70a, that is, rotates the first gear G1 by a rotation angle that is determined in advance and is necessary for housing the combiner 50 ′ (of course, it is closed from the open state). Rotate in the opposite direction to the state). The rotational power of the first gear G1 is transmitted to the second gear G2, and the movable member 60 to which the combiner 50 'is fixed rotates around the central axis AX. As a result, the combiner 50 ′ rises and the HUD device 1 ′ enters the “open state” shown in FIG.

  Here, the control unit rotates the rotation shaft 70a by a rotation angle predetermined in the storage unit. However, the HUD device 1 'detects a rotation angle of the rotation shaft 70a or a combiner. A sensor for detecting the position of 50 ′ may be provided, and the open / closed state of the combiner 50 ′ may be detected by such a sensor. In this case, the control unit rotates the rotating shaft 70a when acquiring the operation signal, and stops the rotation of the rotating shaft 70a when acquiring the detection signal indicating that the combiner 50 'is in the open or closed position from the sensor. . In this way, the open / closed state is realized.

The HUD device 1 ′ according to the second embodiment configured as described above includes a display unit 20 that emits display light L that represents a display image, and display light L that is emitted from the display unit 20 is incident. And the attached portion 61 to which the combiner 50 ′ is attached, and the combiner 50 ′ has one end thereof. The protrusion 51 ′ protrudes in a direction other than the in-plane direction of the combiner 50 ′ from the portion, and the protrusion 51 ′ is attached to the attached portion 61 from the direction orthogonal to the protruding direction. The combiner 50 ′ is attached to the attached portion 61.
Thereby, the force for fixing the combiner 50 ′ to the attached portion 61 is applied in the out-of-plane direction (normal direction of the surface) of the combiner 50 ′ (that is, the combiner 50 ′ is applied in a direction in which the combiner 50 ′ is easily distorted). Since it can be avoided as much as possible, the combiner 50 ′ is not easily distorted, and the display image L is not easily distorted when the display light L is collected by the combiner 50 ′. Therefore, a reduction in visibility can be reduced as much as possible.
Further, since the combiner 50 ′ is not easily distorted, it is not necessary to form the combiner 50 ′ thicker than necessary in order to ensure the strength against distortion, and the thickness of the combiner 50 ′ can be reduced. If the combiner 50 'can be made thin, it is good from the viewpoint of weight reduction and cost, and the parallax due to the thickness of the combiner 50 can be reduced, so that the display image viewed by the viewer 2 looks double. It is possible to suppress as much as possible that the visibility decreases.

In the HUD device 1 ′ according to the second embodiment, the protruding portion 51 ′ protrudes in the viewer 2 side direction of the display image.
Furthermore, the HUD device 1 ′ according to the second embodiment further includes a case body 10 ′ that houses the display unit 20 and supports the attached portion 61 so as to be rotatable about a predetermined axis (center axis AX). Since the attached portion 61 is rotatable about the axis, the combiner 50 'can be tilted toward the viewer 2 side of the display image.
Thereby, since protrusion 51 'is in a closed state and does not protrude from case body 10', it can implement | achieve the good-looking accommodation of combiner 50 ', and does not impair the commercial property of HUD apparatus 1'.

  In addition, this invention is not limited by the said embodiment and drawing. It goes without saying that changes (including deletion of components) can be added to the embodiment and the drawings.

  In the above description, an example in which the protrusions (51, 51 ′) of the combiner (50, 50 ′) protrude along the front or rear direction (see the double-ended arrows in FIG. 3 and the like) is shown. I can't. The protruding portion protrudes from one end portion of the combiner in a direction other than the in-plane direction of the combiner, and a force for fixing the combiner is applied more than necessary in the out-of-plane direction (normal direction of the surface) of the combiner. In a range where no significant distortion occurs, the protrusion may protrude in a direction different from the above embodiment. That is, within such a range, the angle formed by the direction in which the combiner extends and the protruding direction of the protruding portion may be smaller or larger than that shown in FIG.

  In the above description, the example in which the display light L from the display unit 20 is reflected by the reflection unit 40 and reaches the combiners (50, 50 ') is shown, but the present invention is not limited thereto. The HUD device may be configured such that the display unit emits the display light L directly toward the combiner. In this case, the display unit and the combiner are provided so as to face each other, and the reflection unit 40 is unnecessary.

  In the second embodiment, the example in which the combiner 50 ′ can be opened and closed by the power of the electric motor 70 is shown, but the present invention is not limited to this. A HUD device configured to manually open and close the combiner 50 'may be used.

  In the above description, an example of a vehicle on which the HUD devices 1 and 1 ′ are installed is a vehicle, but is not limited thereto. The HUD devices 1 and 1 ′ can be installed near the driver's seat of other vehicles such as ships and aircraft. Furthermore, the present invention is not limited to the one installed near the driver's seat of the vehicle, but can be applied to a desktop interior installed indoors.

  In the above description, the HUD devices 1 and 1 ′ are described as stationary types. However, the HUD devices 1 and 1 ′ may be configured integrally with a dashboard of a vehicle, for example.

  In the above description, in order to facilitate the understanding of the present invention, the description of known unimportant technical matters is appropriately omitted.

1, 1 '... HUD device
2 ... Viewer 10, 10 '... Case body 100 ... Bearing portion 11, 11' ... Upper case 110 ... Opening portion 111 ... Mounted portion 112 ... Recess for shaft support 12, 12 '... Lower case 121 ... Recess 122 ... Installation part 13 ... Middle case 130 ... Outlet 20 ... Display part 30 and 30 '... Circuit board 40 ... Reflection part 50 and 50' ... Combiner 50a and 50a '... Concave surface 51 and 51' ... Protrusion part 60 ... Movable member 60a ... Shaft part AX ... Center axis 61 ... Mounted part 70 ... Electric motor

Claims (1)

A display unit that emits display light representing a display image;
A combiner having a curved surface that allows the viewer to visually recognize the display image by allowing the display light emitted from the display unit to enter and condensing the incident display light;
A mounted portion to which the combiner is mounted;
The combiner has a protruding portion that protrudes in the viewer side direction from one end thereof in a state where the viewer can visually recognize the display image .
Said protrusion, that is attached to the attached part from the direction perpendicular to the direction in which the projecting, said combiner, said mounted to the mounting portion,
A movable member having a predetermined axis; and a case body that houses the display unit and supports the movable member so as to be rotatable around the axis.
The attached portion is provided on the lower surface side of the movable member, and the attached portion is rotatable about the axis, whereby the combiner can be tilted to the viewer side. ,
A head-up display device.

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