JP2014123007A - Head-up display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head-up display device which is superior in terms of decorativeness and information expressiveness and, as such, offers improved merchantability.SOLUTION: An HUD device 1 includes a display unit 20 which emits display light L1 for forming a display image, and the display light L1 is guided to a combiner 50 to allow a viewer 2 to view the display image. The HUD device 1 also includes an LED 60 which is different from the display unit 20, an incident section 52 which is formed on the combiner 50 to allow illumination light L2 from the LED 60 to enter the combiner 50, and an exit section 53 which is formed on the combiner 50 to allow the illumination light L2 guided into the combiner to exit.

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 Document 1, only the display image from the display device is visually recognized by the user, so the appearance is monotonous, and areas other than the central area where the combiner display image is displayed are effective for information display. It has not been utilized, and there is still room for improvement in improving product quality.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a head-up display device that is rich in decorativeness and information expressive power and can improve merchantability.

In order to achieve the above object, a head-up display device according to the present invention includes:
A head-up display device comprising a display unit that emits display light representing a display image, allowing the display light to be incident on a combiner and causing the viewer to visually recognize the display image,
A light source different from the display unit; an incident part formed in the combiner for entering light from the light source into the combiner; and an emission part formed in the combiner for emitting light guided into the combiner to the outside. It is characterized by comprising.

  According to the present invention, it is rich in decorativeness and information expressive power, and it becomes possible to improve merchantability.

It is a schematic sectional drawing of the HUD apparatus which concerns on embodiment of this invention. It is a front view of the HUD apparatus shown in FIG.

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

As shown in FIGS. 1 and 2, the HUD device 1 includes a case body 10, a display unit 20, a circuit board 30, a reflection unit 40, a combiner 50, an LED (Light Emitting Diode) 60, and a mounting member. 70.
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. Assuming that the right direction is “right” and the left direction is “left” (see the double-headed arrows in FIGS. 1 and 2), 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 (the right end portion in FIG. 1) of the upper case 11, and the combiner 50 is attached by, for example, a screw or an adhesive. When the combiner 50 is attached to the attached portion 111, the combiner 50 looks like it extends upward from the upper case 11. In addition, the attached portion 111 is formed with a slit portion 112 that exposes a lower end portion including an incident portion 52 described later of the combiner 50.

  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). In addition, a protrusion 122 corresponding to a connecting member 72 described later of the attachment member 70 is formed on the lower surface of the lower case 12.

  The middle case 13 is a substantially cylindrical member, and the display unit 20 is disposed on a part of the outer surface (the right side in FIG. 1). 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 L1 representing a display image for notifying display information such as a vehicle speed and a travel distance. For example, a transmissive liquid crystal display including a liquid crystal panel and a light source for backlight, Or it comprises a self-luminous display such as a fluorescent display tube or an organic EL panel.

  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 such as a vehicle speed and an engine speed transmitted from an external device (not shown) such as a vehicle ECU (Electronic Control Unit) through a communication line, and the display unit 20 responds accordingly. (That is, a predetermined display image is displayed on the display unit 20). An LED 60 is mounted on the upper surface of the circuit board 30.

  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 1, and reflects the reached display light L 1 toward the combiner 50. The reflection unit 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 L1 from the display unit 20 to the combiner 50 (in FIG. 1, 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 L1 emitted from the display unit 20 passes through the emission port 130 and reaches the reflection unit 40. Then, the display light L <b> 1 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 is a plate-shaped member having a curved surface. For example, the combiner 50 is a half mirror made of a transparent resin molded product in which a semi-transmissive reflective layer is formed on a main surface (a surface substantially opposite to the reflective surface of the reflective portion 40). Composed. The combiner 50 has a protruding portion 51 that protrudes from one end side (lower end side) thereof 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).

  As shown in FIG. 1, 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. Specifically, the protruding portion 51 is located in front of the viewer 2 (viewer with respect to the combiner 50. (Opposite to 2). For example, there are two projecting portions 51, and the combiner 50 is attached to the attached portion 111 by fixing the projecting portion 51 to the attached portion 111 of the upper case with a screw or an adhesive. 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. 1, the combiner 50 changes the optical path of the incident display light L <b> 1 after being reflected by the reflecting section 40 (if a half mirror is used as the combiner 50, the optical path of the display light L <b> 1 is changed by reflection). . The concave surface 50a of the combiner 50 has a function of condensing the display light L1, 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 V of the display image at the front position F and transmits light from the front, whereby the HUD device 1 can display both the virtual image V and the outside scene actually present in front. The viewer 2 can visually recognize it.

  The combiner 50 is opposed to the LED 60 on the lower end side thereof, receives the illumination light L2 emitted from the LED 60, and enters the illumination light L2 into the combiner 50 (inside the transparent resin part constituting the combiner 50). 52 is formed. Further, the combiner 50 directs the illumination light L2 guided to the inside of the combiner 50 from the incident portion 52 at the peripheral edge except the lower end side, that is, the upper end side and the left and right end sides toward the rear side, that is, the viewer 2. An emission part 53 is formed that reflects and exits to the outside (toward the left side in FIG. 1). The incident part 52 is formed in a concave curved surface shape so as to diffuse the illumination light L <b> 2 to the entire interior of the combiner 50. The emitting portion 53 forms an inclined surface that is inclined at the upper end and the left and right ends of the front surface of the combiner 50 such that the upper end is located on the rear side and the lower end is located on the front side, that is, inclined from the upper end to the lower end away from the viewer 2. The slanted surface is subjected to texture processing or mirror surface processing to increase the reflectance of light, or a diffusion member that diffuses light is disposed.

  The LED 60 is mounted on the upper side surface of the circuit board 30 and is provided as a light source different from the display unit 20. The LED 60 emits illumination light L <b> 2 having an arbitrary emission color toward the incident portion 52 of the combiner 50. The illumination light L2 emitted from the LED 60 is guided from the incident part 52 to the inside of the combiner 50, diffuses inside the combiner 50, is reflected by the emitting part 53, and is reflected from the peripheral part of the concave surface 50a to the rear side, that is, the viewer. 2 toward the outside. Therefore, as shown by the shaded portion in FIG. 2, the peripheral portion of the concave surface 50a of the combiner is emitted by the illumination light L2. Thus, using the peripheral portion where the virtual image V of the display image of the combiner 50 is not displayed, the decorativeness is enhanced by light emission of the peripheral portion, or information (for example, warning information) different from the display image is provided to the viewer 2. can do. The LED 60 may be capable of arbitrarily changing the emission wavelength, that is, the emission color.

  The attachment member 70 is for attaching the HUD device 1 on the dashboard of the vehicle, and includes a pedestal 71, a connecting member 72, and a fixing member 73.

  The pedestal 71 is made of, for example, a metal plate, and is formed by standing two insertion ribs 711 on a substantially rectangular flat plate (one insertion rib 711 is shown in FIG. 1). Each of the two insertion ribs 711 is formed with a bolt hole (not shown) through which a pin bolt 4 described later is inserted. The pedestal 71 is joined to the dashboard of the vehicle via a sheet-like adhesive member (not shown) such as a double-sided tape, and the HUD device 1 is arranged on the dashboard.

  The connecting member 72 is made of, for example, a hard synthetic resin, and is formed continuously with a substantially rectangular flat plate portion 721 and an end portion on the front side (right side in FIG. 1) of the flat plate portion 721, and the pin bolt 4 and the pin bolt 4 inside thereof. And a sleeve portion 722 in which a space for accommodating a nut (not shown) to be screwed is formed. A hole (not shown) is formed in the flat plate portion 721 corresponding to the protruding portion 122 of the lower case 12 slightly toward the rear side in the center of the plane, and the protruding portion 122 is fitted into this hole portion. Thus, the connecting member 72 is attached to the lower surface of the lower case 12 so as to be rotatable in the left-right direction around the protrusion 122. The sleeve portion 722 is formed with an insertion slit (not shown) for inserting the insertion rib 711 provided on the base 71. After inserting the insertion rib 711 into the insertion slit, the pin bolt 4 is inserted into the sleeve portion 722 and screwed with the nut, so that the connecting member 72 can be rotated up and down around the pin bolt 4. 71 is attached.

  The fixing member 73 is formed of, for example, a hard synthetic resin and has a substantially disk shape. The fixing member 73 is disposed below the protruding portion 122 of the lower case 12 and the flat plate portion 721 of the connecting member 72, and the protruding portion 122 and the flat plate portion 721. Is supported from below. The fixing member 73 is fixed in a state where the protruding portion 122 and the connecting member 72 are supported by, for example, a screw (not shown). The fixing member 73 supports the protrusion 122 and the connecting member 72 to prevent the connecting member 72 from being removed from the arrangement position.

The HUD device 1 having the above configuration includes a display unit 20 that emits display light L1 representing a display image, and makes the viewer 2 visually recognize the display image by causing the display light L1 to enter the combiner 50. The LED 60 is different from the display unit 20, the incident unit 52 is formed in the combiner 50 and enters the combiner 50 with the illumination light L <b> 2 from the LED 60, and the illumination light is formed in the combiner 50 and guided into the combiner 50. And an emission part 53 for emitting L2 to the outside.
According to this, with the illumination light L2 emitted from the emission part 53, it is possible to improve the decorativeness or information expression power and improve the merchantability.

Further, the emitting portion 53 is provided on the periphery of the combiner 50.
According to this, it is possible to improve the decorativeness or information expression power by using the peripheral edge where the virtual image V of the display image of the combiner 50 is not displayed, and to improve the merchantability.

Further, the emitting portion 53 is characterized by being textured or mirror-finished.
According to this, the illumination light L2 from the LED 60 can be favorably reflected and efficiently emitted to the outside.

In addition, the emitting portion 53 is characterized in that a diffusing member is provided.
According to this, the illumination light L2 from the LED 60 can be diffused and emitted uniformly to the outside.

  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.

  For example, a plurality of light sources having different emission colors may be provided, and light having different emission colors may be emitted from different emission units corresponding to the respective light sources. In this case, it is necessary to adjust the direction of light in the combiner by appropriately determining the shape and number of incident portions. According to this, the decorativeness can be further improved, or a plurality of pieces of information can be expressed to improve information expression. Moreover, it may be suggested that the light emission location is previously known by painting or printing at a location facing the emitting portion 53 of the concave surface 50a, so that information is displayed. Further, the reflection part of the emission part 53 may be formed to have a partially different reflectivity by providing a reflection layer having a partially different reflectance by vapor deposition or the like on the emission part 53. Can be increased.

  In the above description, the display light L1 from the display unit 20 is reflected by the reflection unit 40 and reaches the combiner 50. However, the present invention is not limited to this. The HUD device may be configured such that the display unit emits display light 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 above description, an example of a vehicle on which the HUD device 1 is installed is a vehicle, but is not limited thereto. The HUD device 1 can also 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 device 1 is described as a stationary type. However, the HUD device 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.

DESCRIPTION OF SYMBOLS 1 HUD apparatus 2 Viewer 10 Case body 11 Upper case 12 Lower case 13 Middle case 130 Outlet 20 Display part 30 Circuit board 40 Reflecting part 50 Combiner 52 Incident part 53 Outer part 60 LED (light source)
70 Mounting member

Claims (4)

A head-up display device comprising a display unit that emits display light representing a display image, allowing the display light to be incident on a combiner and causing the viewer to visually recognize the display image,
A light source different from the display unit; an incident part formed in the combiner for entering light from the light source into the combiner; and an emission part formed in the combiner for emitting light guided into the combiner to the outside. And a head-up display device.   The head-up display device according to claim 1, wherein the emitting unit is provided on a peripheral edge of the combiner.   The head-up display device according to claim 1, wherein the emitting unit is subjected to a textured process or a mirror-finished process.   The head-up display device according to claim 1, wherein the emitting portion is provided with a diffusion member.

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