WO2021235284A1 - Head-up display device - Google Patents

Head-up display device Download PDF

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Publication number
WO2021235284A1
WO2021235284A1 PCT/JP2021/018005 JP2021018005W WO2021235284A1 WO 2021235284 A1 WO2021235284 A1 WO 2021235284A1 JP 2021018005 W JP2021018005 W JP 2021018005W WO 2021235284 A1 WO2021235284 A1 WO 2021235284A1
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WO
WIPO (PCT)
Prior art keywords
display
light
display unit
unit
optical element
Prior art date
Application number
PCT/JP2021/018005
Other languages
French (fr)
Japanese (ja)
Inventor
宥児 風間
俊郎 鶴丸
Original Assignee
日本精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本精機株式会社 filed Critical 日本精機株式会社
Priority to DE112021002886.3T priority Critical patent/DE112021002886T5/en
Priority to JP2022524406A priority patent/JPWO2021235284A1/ja
Publication of WO2021235284A1 publication Critical patent/WO2021235284A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K35/00—Arrangement of adaptations of instruments
    • B60K35/23—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • B60K2360/688—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0101—Head-up displays characterised by optical features
    • G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
    • G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects

Definitions

  • the present invention relates to a head-up display device.
  • a head-up display (HUD) device that emits display light representing an image toward a translucent member (for example, a windshield of a vehicle) and displays a virtual image of the image.
  • a translucent member for example, a windshield of a vehicle
  • Patent Document 1 describes a display element that emits display light and one of the display light emitted from the display element in order to suppress light that is unnecessary for displaying a virtual image (hereinafter, referred to as "stray light").
  • a HUD device comprising a light-shielding member that shields the portion is described.
  • Patent Document 1 if only a dedicated light-shielding member is provided to suppress stray light, the number of parts may increase and the configuration may be complicated.
  • 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 capable of suppressing stray light with a simple configuration.
  • the head-up display device is A display unit that emits display light that represents an image, A reflective unit that reflects the display light radiated from the display unit toward an external translucent member, and a reflective unit.
  • a case having a housing portion for accommodating the display unit, a passage port through which the display light radiated from the display unit is passed, and a bottom portion through which the display light from the passage port to the reflection unit passes through the front side.
  • a frame portion located between the display portion and the passage port, and a light-shielding member having a plate portion fixed to the back side of the bottom portion are provided.
  • the accommodating portion has a covering portion that covers the display portion from the front side.
  • the passage port is formed between the cover portion and the bottom portion, and is formed.
  • the frame portion has a shape along the edge of the passage port, and has a shape.
  • the plate portion has a hook portion on which a cord can be hung.
  • the cord includes a display cord that is electrically connected to the display unit.
  • stray light can be suppressed with a simple configuration.
  • the schematic diagram which shows the mode of the virtual image display of the head-up display (HUD) apparatus which concerns on one Embodiment of this invention.
  • the perspective view of the HUD apparatus which concerns on the said embodiment.
  • a perspective view of the display unit according to the embodiment The figure which looked at the case of the HUD apparatus which concerns on the said embodiment from the back side.
  • the perspective view of the light-shielding member and the optical element which concerns on the said embodiment.
  • the head-up display (HUD: Head-Up Display) device 100 is arranged, for example, in the dashboard 2 of the vehicle 1.
  • the HUD device 100 radiates the display light L toward the windshield 3 (windshield).
  • the display light L reflected by the windshield 3 causes the user 4 (mainly the driver of the vehicle 1) to visually recognize the image represented by the display light L as a virtual image V.
  • the virtual image V is displayed in front of the vehicle 1 via the windshield 3.
  • the user 4 can visually recognize the virtual image V displayed superimposed on the landscape in front.
  • the virtual image V displays various information about the vehicle 1 (hereinafter referred to as vehicle information).
  • the vehicle information may include not only the information of the vehicle 1 itself but also the external information of the vehicle 1.
  • the HUD device 100 includes a display unit 10, a reflecting unit 20, a case 30, a light-shielding member 40, an optical element 50, and a circuit board 60.
  • each configuration may be described using the left / right, up / down, and front / rear directions of the vehicle 1.
  • the X-axis along the left-right direction, the Y-axis along the up-down direction, and the Z-axis along the front-back direction are shown in each figure.
  • the upper part of the case 30 may be referred to as "front side”
  • the lower part of the case 30 may be referred to as "back side”.
  • the display unit 10 has a display unit 11, a holder 12 for holding the display unit 11, and a lighting unit 13 for illuminating the display unit 11 from behind.
  • the display unit 11 is composed of, for example, a TFT (Thin Film Transistor) type liquid crystal panel, and displays an image on a display surface 11a facing forward. As shown in FIG. 3, the display unit 11 is electrically connected to a display board 11b on which a drive circuit for driving a liquid crystal panel or the like is mounted. The display board 11b is provided so as to project forward from the lower end of the display unit 11.
  • TFT Thin Film Transistor
  • the holder 12 is formed of, for example, a resin and has a first holding portion 12a for holding the display portion 11 and a second holding portion 12b for holding the display substrate 11b.
  • the first holding portion 12a has a frame shape that exposes the display surface 11a from the opening, and has a fixing portion 12c for fixing the optical element 50 on the front surface thereof.
  • the fixing portions 12c are paired with the display surface 11a interposed therebetween in the X direction, and the elastic member T is attached to each of the fixing portions 12c.
  • the elastic member T will be described later.
  • the second holding portion 12b projects forward from the lower end portion of the first holding portion 12a.
  • the cross section of the holder 12 including the first holding portion 12a and the second holding portion 12b becomes L-shaped as shown in FIG.
  • the display substrate 11b is fixed to the back side of the second holding portion 12b.
  • the lighting unit 13 has a light source 13a, a light source substrate 13b, a lens 13c, a housing 13d, and the like as main configurations.
  • the light source 13a is composed of, for example, an LED (Light Emitting Diode) and emits light in the Z direction.
  • the light source substrate 13b is a substrate on which the light source 13a is mounted, and in this embodiment, the main surface is parallel to the XY plane and the normal of the main surface is parallel to the Z axis.
  • the lens 13c is composed of, for example, a condenser lens, and collects the light emitted from the light source 13a.
  • the housing 13d holds the light source substrate 13b and the lens 13c, and forms an illumination chamber that guides the light from the light source 13a to the display unit 11.
  • the housing 13d is composed of, for example, a combination of a plurality of members.
  • the display unit 11 displays an image on the display surface 11a by being illuminated by the illumination unit 13. As a result, the display light L representing the image is emitted from the display unit 11.
  • the reflecting unit 20 shown in FIG. 2 is composed of, for example, a concave mirror, and reflects the display light L from the display unit 11 toward the windshield 3 shown in FIG.
  • the virtual image V visually recognized by the user 4 due to the display light L reflected by the concave mirror is magnified more than the image displayed on the display unit 11.
  • the reflecting unit 20 may be composed of a plurality of mirrors. The number of mirrors constituting the reflecting unit 20 can be arbitrarily changed according to the design.
  • the case 30 is radiated from the optical path forming chamber 31 forming the optical path of the display light L radiated from the display unit 11, the accommodating unit 32 accommodating the display unit 11, and the display unit 11. It has a passage port 33 through which the indicator light L is passed.
  • the case 30 is made of, for example, metal, and the optical path forming chamber 31, the accommodating portion 32, and the passage port 33 are integrally formed.
  • the optical path forming chamber 31 has a box shape that opens upward, and has a bottom portion 310 and a support portion 311 that supports the reflection portion 20.
  • the bottom portion 310 passes the display light L extending from the display portion 11 to the reflection portion 20 on the front side.
  • the bottom portion 310 has a substrate arrangement portion 310a on which the circuit board 60 is arranged and an adjacent portion 310b adjacent to the substrate arrangement portion 310a on the back side.
  • the adjacent portion 310b is provided with a plate portion 42, which will be described later, of the light-shielding member 40.
  • the support portion 311 is composed of a pair of walls rising upward from both ends of the bottom portion 310 in the X direction.
  • the support portion 311 supports the reflective portion 20 via a mirror holder (not shown) that holds the reflective portion 20.
  • the reflective portion 20 may be configured to be rotatable around an axis along the X direction.
  • the accommodating portion 32 has a portion protruding upward from the bottom portion 310 and is formed in a box shape.
  • the accommodating portion 32 opens downward and accommodates most of the display unit 10 including the display unit 11 inside the accommodating portion 32.
  • the display unit 10 is inserted into the accommodating portion 32 from below.
  • the accommodating portion 32 has a covering portion 320 that covers the display unit 10 from the front side (upper side), and a wall portion 321 that hangs down from the rear end portion of the covering portion 320.
  • the wall portion 321 faces each other with the light source substrate 13b of the lighting portion 13.
  • the wall portion 321 has a heat sink 321a as shown in FIGS. 2 and 3.
  • the heat sink 321a has a plurality of heat dissipation fins provided toward the outside of the wall portion 321.
  • the passage port 33 is formed between the cover portion 320 and the bottom portion 310. As shown in FIG. 2, the passage port 33 is formed in a rectangular shape.
  • the display unit 11 is provided with the display surface 11a tilted with respect to the XY plane in order to suppress the generation of stray light caused by external light (not shown).
  • the external light is mixed in the HUD device 100
  • the external light reflected by the reflecting unit 20 may be further reflected by the display surface 11a of the display unit 11.
  • the display surface 11a is set at an angle ⁇ with respect to the XY plane.
  • the angle ⁇ can be arbitrarily set to an appropriate value according to the optical system in the HUD device 100, but can be set, for example, in the range of 10 ° to 30 °.
  • the facing surface 50a facing the display surface 11a is provided at an angle ⁇ with respect to the display surface 11a. The reason for this will be described later.
  • the light-shielding member 40 is formed of, for example, a resin with a light-shielding property, and has a frame portion 41 and a plate portion 42 as shown in FIGS. 3, 6 and the like.
  • the frame portion 41 has a frame shape along the edge of the passage port 33.
  • the frame portion 41 is located between the display unit 11 and the passage port 33 so as to fill the gap generated between the display unit 11 and the passage port 33 by arranging the display unit 11 at an angle as described above.
  • the frame portion 41 has a flat plate portion 41a whose upper surface is flush with the bottom portion 310 of the case 30.
  • the second holding portion 12b of the holder 12 is located on the back side (lower side) of the flat plate portion 41a.
  • the frame portion 41 has a plurality of protrusions P protruding in the Z direction at its open end.
  • the protrusions P form a columnar shape, and in this embodiment, they are provided at locations corresponding to the vertices of the triangle, and there are a total of three protrusions P.
  • the three protrusions P abut on one surface of the optical element 50 (opposite surface of the above-mentioned facing surface 50a).
  • the optical element 50 is positioned with respect to the frame portion 41 by the three protrusions P.
  • the plate portion 42 is a plate-shaped portion fixed to the back side of the bottom portion 310 of the case 30. Specifically, as shown in FIG. 3, the plate portion 42 is connected to the flat plate portion 41a of the frame portion 41 via the stepped portion 41b, and reaches the back side of the bottom portion 310. The plate portion 42 is fixed to the adjacent portion 310b of the bottom portion 310.
  • the plate portion 42 is formed with a hook portion on which the cord distributed on the back side of the bottom portion 310 can be hung.
  • the plate portion 42 has a first hook portion H1 on which the display code C1 is hung, and a second hook portion H2 on which the light source code C2 is hung.
  • the display code C1 is composed of an FFC (Flexible Flat Cable) that electrically connects the display unit 11 and the circuit board 60.
  • the light source cord C2 is composed of a lead wire that electrically connects the light source substrate 13b and the circuit board 60.
  • one first hook portion H1 is provided and a plurality of second hook portions H2 are provided, but the number, arrangement, and shape of the first hook portion H1 and the second hook portion H2 are the cords. It is optional depending on the arrangement mode.
  • the optical element 50 is a known optical member that transmits the display light L from the display unit 11 to the reflection unit 20, and has a plate shape. As shown in FIG. 3, the optical element 50 is located on the passage port 33 side of the display unit 11.
  • the optical element 50 is provided for antireflection, for example, and is composed of a retardation plate such as a ⁇ / 4 plate (also referred to as a 1/4 wave plate).
  • the optical element 50 may be an AR (Anti? Reflection) film, a transparent plate material having an AR film, a hot mirror, or the like.
  • the optical element 50 is sandwiched between the holder 12 and the frame portion 41 of the light-shielding member 40 in a posture in which the facing surface 50a is tilted with respect to the display surface 11a of the display unit 11.
  • the optical element 50 is fixed to the holder 12 via an elastic member T attached to the fixing portion 12c of the holder 12 (the optical element 50 is omitted in FIG. 4).
  • the elastic member T has a plate shape and is made of, for example, an elastic double-sided tape.
  • the optical element 50 fixed to the holder 12 via the elastic member T is pressed in the Z direction by the three protrusions P (see FIG. 6) provided on the frame portion 41 on the opposite surface of the facing surface 50a. In this way, the optical element 50 is sandwiched between the holder 12 and the frame portion 41.
  • the angle ⁇ of the facing surface 50a with respect to the display surface 11a is such that, among the display lights L radiated from the display unit 11, the secondary reflected light Ls, which is the light reflected by the facing surface 50a and then further reflected by the display surface 11a, is the reflecting unit.
  • the angle is set so that it does not reach 20.
  • the angle ⁇ can be arbitrarily set to an appropriate value according to the optical system in the HUD device 100, but can be set, for example, in the range of 5 ° to 15 °.
  • the circuit board 60 is arranged and fixed to the board arrangement portion 310a of the bottom portion 310.
  • the circuit board 60 is a printed circuit board on which various circuits are formed and a control unit including a microcomputer is mounted.
  • the circuit board 60 is electrically connected to the display unit 11 via the display board 11b and the display code C1. Further, the circuit board 60 is electrically connected to the light source substrate 13b via the light source cord C2.
  • the control unit mounted on the circuit board 60 controls the overall operation of the HUD device 100, controls the display operation of the display unit 11, and controls the light emission operation of the light source 13a.
  • the control unit communicates with a system such as an ECU (Electronic Control Unit) that controls each part of the vehicle 1, and causes the display unit 11 to display an image showing vehicle information.
  • ECU Electronic Control Unit
  • An upper cover provided with a cover glass (not shown) is attached above the case 30.
  • the display light L reflected by the reflecting unit 20 passes through the cover glass and heads toward the windshield 3.
  • a lower cover (not shown) that covers the circuit board 60 and the like from below is attached to the lower part of the case 30.
  • the display unit 11 that emits the display light L that represents an image and the display light L that is emitted from the display unit 11 are sent to the windshield 3 (an example of an external translucent member).
  • a reflecting portion 20, a case 30, and a light-shielding member 40 are provided.
  • the accommodating unit 32 accommodating the display unit 11, the passing port 33 through which the display light L radiated from the display unit 11 passes, and the display light L extending from the passing port 33 to the reflecting unit 20 pass through the front side. It has a bottom 310.
  • the light-shielding member 40 has a frame portion 41 located between the display portion 11 and the passage port 33, and a plate portion 42 fixed to the back side of the bottom portion 310.
  • the accommodating portion 32 has a covering portion 320 that covers the display portion 11 from the front side, and the passage port 33 is formed between the covering portion 320 and the bottom portion 310. Further, the frame portion 41 has a shape along the edge of the passage port 33.
  • the plate portion 42 has hook portions (first hook portion H1, second hook H2) on which cords (display cord C1 and light source cord C2) are hung.
  • the cord includes a display cord C1 that is electrically connected to the display unit 11. According to the above configuration, it is possible to suppress the leakage of the display light L and the entry of external light from between the display unit 11 and the passage port 33, so that stray light can be suppressed. Further, since the light-shielding member 40 is provided with a hook portion for hooking the cord so that the light-shielding member 40 has a plurality of functions, the number of parts can be reduced and the configuration can be simplified.
  • the HUD device 100 includes a circuit board 60 provided on the back side of the bottom portion 310 and electrically connected to the display unit 11 by the display cord C1. According to this configuration, the display code C1 leading to the circuit board 60 located on the back side of the case 30 can be hung on the hook portion located on the back side of the case 30 to be arranged, so that the parts on the back side of the case 30 can be arranged. Easy to assemble.
  • the HUD device 100 is located in the accommodating portion 32, is located between the holder 12 holding the display unit 11 and the display unit 11 and the passing port 33, and is an optical element 50 through which the display light L is transmitted. And.
  • the optical element 50 is sandwiched between the holder 12 and the frame portion 41 in a posture in which the facing surface 50a facing the display unit 11 is tilted with respect to the display surface 11a of the display unit 11.
  • the light-shielding member 40 can be further provided with a function, so that the number of parts can be reduced. Further, the tilted optical element 50 can suppress the secondary reflected light Ls from becoming stray light.
  • the angle of the facing surface 50a with respect to the display surface 11a is set after being reflected by the facing surface 50a of the display light L emitted from the display unit 11. It is preferable that the secondary reflected light Ls, which is the light further reflected by the display surface 11a, does not reach the reflecting portion 20.
  • the frame portion 41 preferably has a shape that fills the gap generated between the optical element 50 and the passage port 33.
  • the optical element 50 is fixed to the holder 12 via an elastic member T. With this configuration, the cushioning property of the optical element 50 can be enhanced.
  • the frame portion 41 has a plurality of protrusions P protruding toward the optical element 50, and the optical element 50 has the holder 12 and the frame portion 41 in a state of being pushed by the plurality of protrusions P. It is sandwiched between. With this configuration, the optical element 50 can be satisfactorily positioned with respect to the frame portion 41 in a state of substantially point contact.
  • the cord hung on at least one of the first hook portion H1 and the second hook portion H2 is not limited to the lead wire and FFC, and may include an FPC (Flexible Printed Circuit).
  • FPC Flexible Printed Circuit
  • the elastic member T is not limited to the elastic double-sided tape and is arbitrary as long as it can be fixed to the holder 12.
  • the elastic member T may be a sponge material such as urethane foam, an elastomer containing rubber, or the like, which is fixed to the holder 12 by adhesion or the like.
  • the display unit 11 of the display unit 10 is composed of a liquid crystal panel
  • the configuration of the display unit 11 and the display unit 10 is not limited and is arbitrary.
  • the display unit 11 may be composed of an OLED (Organic Light-Emitting Diode).
  • the display unit 10 may be configured to include a DMD (Digital Micromirror Device) and a display unit 11 including a transmissive screen that receives reflected light from the DMD and displays an image.
  • the transmissive screen can be considered as the display surface 11a.
  • the translucent member that reflects the HUD device 100 toward the user 4 is not limited to the windshield 3 of the vehicle 1, and may be a combiner composed of a plate-shaped half mirror, a hologram element, or the like.
  • the type of vehicle 1 on which the HUD device 100 is mounted is not limited, and can be applied to various vehicles such as motorcycles and motorcycles. Further, the HUD device 100 may be mounted on a vehicle other than the vehicle 1, such as an aircraft, a ship, and a snowmobile.
  • HUD Head-up display
  • 10 ... Display unit 11 ... Display unit, 11a ... Display surface, 11b ... Display board 12 ... Holder, 12a ... First holding unit, 12b ... Second holding unit 12c ... Fixed unit, T ... Elastic member 13 ... Illumination part, 13a ... Light source, 13b ... Light source substrate, 13c ... Lens, 13d ... Housing 20 ... Reflection part 30 ... Case 31 ... Optical path forming chamber 310 ... Bottom, 310a ... Board arrangement part, 310b ... Adjacent part, 311 ... Support part 32 ... Accommodating part, 320 ... Covering part, 321 ... Wall part, 321a ... Heat source 33 ...
  • Passing port 40 Shading member 41 ... Frame part, 41a ... Flat plate part, 41b ... Stepped part, P ... Projection 42 ... Plate H1 ... 1st hook, H2 ... 2nd hook C1 ... Display code, C2 ... Light source code 50 ... Optical element, 50a ... Facing surface 60 ... Circuit board 1 ... Vehicle, 2 ... Dashboard, 3 ... Front glass, 4 ... User L ... Display light, V ... Void image, Ls ... Secondary reflected light

Abstract

Provided is a head-up display (HUD) device that can suppress stray light by using a simple configuration. This HUD device 100 comprises a display unit 11 that radiates display light L for displaying an image, a case 30, and a light-shielding member 40. The case 30 has an accommodation part 32 that accommodates the display unit 11, a pass-through port 33, and a bottom part 310 in which the display light L from the pass-through port 33 passes the front side. The light-shielding member 40 has a frame part 41 positioned between the display unit 11 and the pass-through part 33 and a plate part 42 fixed to the rear side of the bottom part 310. The accommodation part 32 has a cover section 320 that covers the display unit 11 from the front side, and the pass-through port 33 is formed between the cover part 320 and the bottom part 310. In addition, the frame part 41 forms a shape along the edge of the pass-through port 33. The plate part 42 has a hook section to which a cord is hooked. The cord includes a display cord electrically connected to the display unit 11.

Description

ヘッドアップディスプレイ装置Head-up display device
　本発明は、ヘッドアップディスプレイ装置に関する。 The present invention relates to a head-up display device.
　画像を表す表示光を透光部材（例えば、車両のフロントガラス等）に向けて放射し、当該画像の虚像を表示するヘッドアップディスプレイ（ＨＵＤ：Head-Up Display）装置が知られている。 A head-up display (HUD) device is known that emits display light representing an image toward a translucent member (for example, a windshield of a vehicle) and displays a virtual image of the image.
　例えば、特許文献１には、表示光を発する表示素子と、虚像表示を行う上で不要な光（以下、「迷光」と呼ぶ。）を抑制するために表示素子から発せられた表示光の一部を遮る遮光部材と、を備えるＨＵＤ装置が記載されている。 For example, Patent Document 1 describes a display element that emits display light and one of the display light emitted from the display element in order to suppress light that is unnecessary for displaying a virtual image (hereinafter, referred to as "stray light"). A HUD device comprising a light-shielding member that shields the portion is described.
特許第５５５６０１９号公報Japanese Patent No. 5556019
　特許文献１のように、迷光を抑制するために専用の遮光部材を設けるだけでは、部品点数が増加して構成が複雑化する虞がある。 As in Patent Document 1, if only a dedicated light-shielding member is provided to suppress stray light, the number of parts may increase and the configuration may be complicated.
　本発明は、上記実情に鑑みてなされたものであり、簡潔な構成で迷光を抑制できるヘッドアップディスプレイ装置を提供することを目的とする。 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 capable of suppressing stray light with a simple configuration.
　上記目的を達成するため、本発明に係るヘッドアップディスプレイ装置は、
　画像を表す表示光を放射する表示部と、
　前記表示部から放射された前記表示光を外部の透光部材に向けて反射させる反射部と、
　前記表示部を収容する収容部、前記表示部から放射された前記表示光を通過させる通過口、及び、前記通過口から前記反射部へ至る前記表示光が表側を通過する底部を有するケースと、
　前記表示部と前記通過口の間に位置する枠部、及び、前記底部の裏側に固定される板部を有する遮光部材と、を備え、
　前記収容部は、前記表示部を表側から覆う覆い部を有し、
　前記通過口は、前記覆い部と前記底部との間に形成され、
　前記枠部は、前記通過口の縁に沿った形状をなし、
　前記板部は、コードが掛けられるフック部を有し、
　前記コードは、前記表示部と電気的に接続される表示用コードを含む。 In order to achieve the above object, the head-up display device according to the present invention is
A display unit that emits display light that represents an image,
A reflective unit that reflects the display light radiated from the display unit toward an external translucent member, and a reflective unit.
A case having a housing portion for accommodating the display unit, a passage port through which the display light radiated from the display unit is passed, and a bottom portion through which the display light from the passage port to the reflection unit passes through the front side.
A frame portion located between the display portion and the passage port, and a light-shielding member having a plate portion fixed to the back side of the bottom portion are provided.
The accommodating portion has a covering portion that covers the display portion from the front side.
The passage port is formed between the cover portion and the bottom portion, and is formed.
The frame portion has a shape along the edge of the passage port, and has a shape.
The plate portion has a hook portion on which a cord can be hung.
The cord includes a display cord that is electrically connected to the display unit.
　本発明によれば、簡潔な構成で迷光を抑制できる。 According to the present invention, stray light can be suppressed with a simple configuration.
本発明の一実施形態に係るヘッドアップディスプレイ（ＨＵＤ）装置の虚像表示の態様を示す模式図。The schematic diagram which shows the mode of the virtual image display of the head-up display (HUD) apparatus which concerns on one Embodiment of this invention. 同上実施形態に係るＨＵＤ装置の斜視図。The perspective view of the HUD apparatus which concerns on the said embodiment. 同上実施形態に係るＨＵＤ装置の図２に示すＡ－Ａ線に沿う概略断面図。The schematic cross-sectional view along the line AA shown in FIG. 2 of the HUD apparatus which concerns on the said embodiment. 同上実施形態に係る表示ユニットの斜視図。Same as above A perspective view of the display unit according to the embodiment. 同上実施形態に係るＨＵＤ装置のケースを裏側から見た図。The figure which looked at the case of the HUD apparatus which concerns on the said embodiment from the back side. 同上実施形態に係る遮光部材及び光学素子の斜視図。The perspective view of the light-shielding member and the optical element which concerns on the said embodiment. 同上実施形態に係る表示部及び光学素子の関係を主に説明するための模式図。Same as above A schematic diagram for mainly explaining the relationship between the display unit and the optical element according to the embodiment.
　本発明の一実施形態について図面を参照して説明する。 An embodiment of the present invention will be described with reference to the drawings.
　図１に示すように、本実施形態に係るヘッドアップディスプレイ（ＨＵＤ：Head-Up Display）装置１００は、例えば、車両１のダッシュボード２内に配設される。ＨＵＤ装置１００は、表示光Ｌをフロントガラス３（ウインドシールド）に向けて放射する。フロントガラス３で反射した表示光Ｌは、ユーザ４（主に車両１の運転者）に表示光Ｌが表す画像を虚像Ｖとして視認させる。虚像Ｖは、フロントガラス３を介して車両１の前方に表示される。これにより、ユーザ４は、前方風景に重畳して表示される虚像Ｖを視認することができる。虚像Ｖは、車両１に関する各種情報（以下、車両情報と言う。）を表示する。なお、車両情報は、車両１自体の情報のみならず、車両１の外部情報も含んでいてもよい。 As shown in FIG. 1, the head-up display (HUD: Head-Up Display) device 100 according to the present embodiment is arranged, for example, in the dashboard 2 of the vehicle 1. The HUD device 100 radiates the display light L toward the windshield 3 (windshield). The display light L reflected by the windshield 3 causes the user 4 (mainly the driver of the vehicle 1) to visually recognize the image represented by the display light L as a virtual image V. The virtual image V is displayed in front of the vehicle 1 via the windshield 3. As a result, the user 4 can visually recognize the virtual image V displayed superimposed on the landscape in front. The virtual image V displays various information about the vehicle 1 (hereinafter referred to as vehicle information). The vehicle information may include not only the information of the vehicle 1 itself but also the external information of the vehicle 1.
　ＨＵＤ装置１００は、図２又は図３に示すように、表示ユニット１０と、反射部２０と、ケース３０と、遮光部材４０と、光学素子５０と、回路基板６０と、を備える。
　なお、以下では、車両１の左右、上下、及び前後方向を用いて各構成を説明する場合がある。左右方向に沿うＸ軸、上下方向に沿うＹ軸、前後方向に沿うＺ軸を各図に示した。また、ケース３０の上方を「表側」、ケース３０の下方を「裏側」と言う場合がある。 As shown in FIG. 2 or 3, the HUD device 100 includes a display unit 10, a reflecting unit 20, a case 30, a light-shielding member 40, an optical element 50, and a circuit board 60.
In the following, each configuration may be described using the left / right, up / down, and front / rear directions of the vehicle 1. The X-axis along the left-right direction, the Y-axis along the up-down direction, and the Z-axis along the front-back direction are shown in each figure. Further, the upper part of the case 30 may be referred to as "front side", and the lower part of the case 30 may be referred to as "back side".
　表示ユニット１０は、表示部１１と、表示部１１を保持するホルダ１２と、表示部１１を後方から照明する照明部１３と、を有する。 The display unit 10 has a display unit 11, a holder 12 for holding the display unit 11, and a lighting unit 13 for illuminating the display unit 11 from behind.
　表示部１１は、例えば、ＴＦＴ（Thin Film Transistor）型の液晶パネルから構成され、前方に向く表示面１１ａに画像を表示する。表示部１１は、図３に示すように、液晶パネルを駆動するための駆動回路などが実装された表示用基板１１ｂと電気的に接続されている。表示用基板１１ｂは、表示部１１の下端部から前方に突出する格好で設けられている。 The display unit 11 is composed of, for example, a TFT (Thin Film Transistor) type liquid crystal panel, and displays an image on a display surface 11a facing forward. As shown in FIG. 3, the display unit 11 is electrically connected to a display board 11b on which a drive circuit for driving a liquid crystal panel or the like is mounted. The display board 11b is provided so as to project forward from the lower end of the display unit 11.
　ホルダ１２は、例えば樹脂から形成され、表示部１１を保持する第１保持部１２ａと、表示用基板１１ｂを保持する第２保持部１２ｂと、を有する。第１保持部１２ａは、開口から表示面１１ａを露出させる枠状をなし、その前面に、光学素子５０を固定するための固定部１２ｃを有する。この実施形態では、固定部１２ｃは、Ｘ方向で表示面１１ａを挟んで一対あり、各々に弾性部材Ｔが貼り付けられる。弾性部材Ｔについては後述する。第２保持部１２ｂは、第１保持部１２ａの下端部から前方に突出している。これにより、第１保持部１２ａ及び第２保持部１２ｂからなるホルダ１２の断面は、図３に示すように、Ｌ字状となる。図３、図５に示すように、第２保持部１２ｂの裏側に表示用基板１１ｂが固定されている。 The holder 12 is formed of, for example, a resin and has a first holding portion 12a for holding the display portion 11 and a second holding portion 12b for holding the display substrate 11b. The first holding portion 12a has a frame shape that exposes the display surface 11a from the opening, and has a fixing portion 12c for fixing the optical element 50 on the front surface thereof. In this embodiment, the fixing portions 12c are paired with the display surface 11a interposed therebetween in the X direction, and the elastic member T is attached to each of the fixing portions 12c. The elastic member T will be described later. The second holding portion 12b projects forward from the lower end portion of the first holding portion 12a. As a result, the cross section of the holder 12 including the first holding portion 12a and the second holding portion 12b becomes L-shaped as shown in FIG. As shown in FIGS. 3 and 5, the display substrate 11b is fixed to the back side of the second holding portion 12b.
　照明部１３は、図３に示すように、光源１３ａ、光源用基板１３ｂ、レンズ１３ｃ、筐体１３ｄ等を主要構成として有する。光源１３ａは、例えばＬＥＤ（Light Emitting Diode）からなり、Ｚ方向に光を発する。光源用基板１３ｂは、光源１３ａが実装される基板であり、この実施形態では、主面がＸＹ平面と平行で、主面の法線がＺ軸と平行となるように設置されている。レンズ１３ｃは、例えばコンデンサレンズからなり、光源１３ａから発せられた光を集光する。筐体１３ｄは、光源用基板１３ｂ及びレンズ１３ｃを保持するとともに、光源１３ａからの光を表示部１１へと導く照明室を形成する。筐体１３ｄは、例えば、複数の部材の組み合わせにより構成されている。表示部１１は、照明部１３によって照明されることで画像を表示面１１ａに表示する。これにより、画像を表す表示光Ｌが表示部１１から放射される。 As shown in FIG. 3, the lighting unit 13 has a light source 13a, a light source substrate 13b, a lens 13c, a housing 13d, and the like as main configurations. The light source 13a is composed of, for example, an LED (Light Emitting Diode) and emits light in the Z direction. The light source substrate 13b is a substrate on which the light source 13a is mounted, and in this embodiment, the main surface is parallel to the XY plane and the normal of the main surface is parallel to the Z axis. The lens 13c is composed of, for example, a condenser lens, and collects the light emitted from the light source 13a. The housing 13d holds the light source substrate 13b and the lens 13c, and forms an illumination chamber that guides the light from the light source 13a to the display unit 11. The housing 13d is composed of, for example, a combination of a plurality of members. The display unit 11 displays an image on the display surface 11a by being illuminated by the illumination unit 13. As a result, the display light L representing the image is emitted from the display unit 11.
　図２に示す反射部２０は、例えば、凹面鏡からなり、表示部１１からの表示光Ｌを図１に示すフロントガラス３に向けて反射させる。凹面鏡で反射した表示光Ｌにより、ユーザ４に視認される虚像Ｖは、表示部１１に表示されている画像よりも拡大されたものとなる。なお、反射部２０は、複数の鏡により構成されていてもよい。反射部２０を構成する鏡の枚数は、設計に応じて任意に変更可能である。 The reflecting unit 20 shown in FIG. 2 is composed of, for example, a concave mirror, and reflects the display light L from the display unit 11 toward the windshield 3 shown in FIG. The virtual image V visually recognized by the user 4 due to the display light L reflected by the concave mirror is magnified more than the image displayed on the display unit 11. The reflecting unit 20 may be composed of a plurality of mirrors. The number of mirrors constituting the reflecting unit 20 can be arbitrarily changed according to the design.
　ケース３０は、図３に示すように、表示部１１から放射された表示光Ｌの光路を形成する光路形成室３１と、表示部１１を収容する収容部３２と、表示部１１から放射された表示光Ｌを通過させる通過口３３と、を有する。ケース３０は、例えば金属から形成され、光路形成室３１、収容部３２及び通過口３３が一体に形成されている。 As shown in FIG. 3, the case 30 is radiated from the optical path forming chamber 31 forming the optical path of the display light L radiated from the display unit 11, the accommodating unit 32 accommodating the display unit 11, and the display unit 11. It has a passage port 33 through which the indicator light L is passed. The case 30 is made of, for example, metal, and the optical path forming chamber 31, the accommodating portion 32, and the passage port 33 are integrally formed.
　光路形成室３１は、上方に開口した箱状をなし、底部３１０と、反射部２０を支持する支持部３１１と、を有する。底部３１０は、図２、図３に示すように、表側において表示部１１から反射部２０へと至る表示光Ｌを通過させる。また、底部３１０は、図５に示すように、裏側において、回路基板６０が配置される基板配置部３１０ａと、基板配置部３１０ａに隣接する隣接部３１０ｂと、を有する。隣接部３１０ｂには、遮光部材４０の後述する板部４２が設けられる。支持部３１１は、底部３１０のＸ方向における両端から上方向に立ち上がる一対の壁により構成されている。支持部３１１は、反射部２０を保持するミラーホルダ（図示せず）を介して、反射部２０を支持する。なお、反射部２０は、概ねＸ方向に沿う軸線周りに回転可能に構成されていてもよい。 The optical path forming chamber 31 has a box shape that opens upward, and has a bottom portion 310 and a support portion 311 that supports the reflection portion 20. As shown in FIGS. 2 and 3, the bottom portion 310 passes the display light L extending from the display portion 11 to the reflection portion 20 on the front side. Further, as shown in FIG. 5, the bottom portion 310 has a substrate arrangement portion 310a on which the circuit board 60 is arranged and an adjacent portion 310b adjacent to the substrate arrangement portion 310a on the back side. The adjacent portion 310b is provided with a plate portion 42, which will be described later, of the light-shielding member 40. The support portion 311 is composed of a pair of walls rising upward from both ends of the bottom portion 310 in the X direction. The support portion 311 supports the reflective portion 20 via a mirror holder (not shown) that holds the reflective portion 20. The reflective portion 20 may be configured to be rotatable around an axis along the X direction.
　収容部３２は、図３に示すように、底部３１０より上方に突出した部分を有して箱状に形成されている。収容部３２は、下方に向かって開口し、その内部において表示部１１を含む表示ユニット１０の大部分を収容する。表示ユニット１０は、収容部３２に下方から挿入されている。収容部３２は、表示ユニット１０を表側（上方）から覆う覆い部３２０と、覆い部３２０の後方端部から垂れ下がる壁部３２１と、を有する。壁部３２１は、図３に示すように、照明部１３の光源用基板１３ｂと互いに対向する。また、壁部３２１は、図２、図３に示すように、ヒートシンク３２１ａを有する。ヒートシンク３２１ａは、壁部３２１の外側に向かって設けられた複数の放熱フィンを有する。 As shown in FIG. 3, the accommodating portion 32 has a portion protruding upward from the bottom portion 310 and is formed in a box shape. The accommodating portion 32 opens downward and accommodates most of the display unit 10 including the display unit 11 inside the accommodating portion 32. The display unit 10 is inserted into the accommodating portion 32 from below. The accommodating portion 32 has a covering portion 320 that covers the display unit 10 from the front side (upper side), and a wall portion 321 that hangs down from the rear end portion of the covering portion 320. As shown in FIG. 3, the wall portion 321 faces each other with the light source substrate 13b of the lighting portion 13. Further, the wall portion 321 has a heat sink 321a as shown in FIGS. 2 and 3. The heat sink 321a has a plurality of heat dissipation fins provided toward the outside of the wall portion 321.
　通過口３３は、図２、図３に示すように、覆い部３２０と底部３１０の間に形成されている。通過口３３は、図２に示すように、矩形状に形成されている。 As shown in FIGS. 2 and 3, the passage port 33 is formed between the cover portion 320 and the bottom portion 310. As shown in FIG. 2, the passage port 33 is formed in a rectangular shape.
　ここで、表示部１１の姿勢について図７を参照して説明する。表示部１１は、外光（図示せず）に起因する迷光の発生を抑制するために、表示面１１ａがＸＹ平面に対して傾いて設けられている。外光がＨＵＤ装置１００内に混入すると、反射部２０で反射した外光が表示部１１の表示面１１ａでさらに反射する場合がある。このように表示面１１ａで反射した外光が反射部２０へ到達するのを抑制するために、表示面１１ａは、ＸＹ平面に対して角度α傾けて設定されている。角度αは、ＨＵＤ装置１００における光学系に応じて適切な値を任意に設定可能であるが、例えば１０°～３０°の範囲内で設定することができる。また、後述の光学素子５０は、表示面１１ａと対向する対向面５０ａが、表示面１１ａに対して角度βだけ傾けて設けられている。この理由は、後述する。 Here, the posture of the display unit 11 will be described with reference to FIG. 7. The display unit 11 is provided with the display surface 11a tilted with respect to the XY plane in order to suppress the generation of stray light caused by external light (not shown). When the external light is mixed in the HUD device 100, the external light reflected by the reflecting unit 20 may be further reflected by the display surface 11a of the display unit 11. In order to prevent the external light reflected by the display surface 11a from reaching the reflecting portion 20, the display surface 11a is set at an angle α with respect to the XY plane. The angle α can be arbitrarily set to an appropriate value according to the optical system in the HUD device 100, but can be set, for example, in the range of 10 ° to 30 °. Further, in the optical element 50 described later, the facing surface 50a facing the display surface 11a is provided at an angle β with respect to the display surface 11a. The reason for this will be described later.
　遮光部材４０は、例えば樹脂により遮光性を有して形成され、図３、図６等に示すように、枠部４１と、板部４２と、を有する。 The light-shielding member 40 is formed of, for example, a resin with a light-shielding property, and has a frame portion 41 and a plate portion 42 as shown in FIGS. 3, 6 and the like.
　枠部４１は、図２に示すように、通過口３３の縁に沿った額縁状をなす。枠部４１は、前述のように表示部１１を傾けて配置することにより、表示部１１と通過口３３の間に生じる隙間を埋めるように、表示部１１と通過口３３の間に位置する。枠部４１は、ケース３０の底部３１０と上面が面一となる平板部４１ａを有する。図３に示すように、平板部４１ａの裏側（下方）に、ホルダ１２の第２保持部１２ｂが位置する。 As shown in FIG. 2, the frame portion 41 has a frame shape along the edge of the passage port 33. The frame portion 41 is located between the display unit 11 and the passage port 33 so as to fill the gap generated between the display unit 11 and the passage port 33 by arranging the display unit 11 at an angle as described above. The frame portion 41 has a flat plate portion 41a whose upper surface is flush with the bottom portion 310 of the case 30. As shown in FIG. 3, the second holding portion 12b of the holder 12 is located on the back side (lower side) of the flat plate portion 41a.
　また、枠部４１は、図６に示すように、その開口端部にＺ方向に向かって突起する複数の突起部Ｐを有する。突起部Ｐは、円柱状をなし、この実施形態では三角形の各頂点に相当する箇所に設けられ、計３つある。３つの突起部Ｐは、光学素子５０の一方の面（前述の対向面５０ａの反対面）に当接する。３つの突起部Ｐにより、光学素子５０は、枠部４１に対して位置決めされる。 Further, as shown in FIG. 6, the frame portion 41 has a plurality of protrusions P protruding in the Z direction at its open end. The protrusions P form a columnar shape, and in this embodiment, they are provided at locations corresponding to the vertices of the triangle, and there are a total of three protrusions P. The three protrusions P abut on one surface of the optical element 50 (opposite surface of the above-mentioned facing surface 50a). The optical element 50 is positioned with respect to the frame portion 41 by the three protrusions P.
　板部４２は、ケース３０の底部３１０の裏側に固定される板状の部分である。具体的に、板部４２は、図３に示すように、枠部４１の平板部４１ａと段状部４１ｂを介して連結され、底部３１０の裏側へ至っている。板部４２は、底部３１０の隣接部３１０ｂに固定される。 The plate portion 42 is a plate-shaped portion fixed to the back side of the bottom portion 310 of the case 30. Specifically, as shown in FIG. 3, the plate portion 42 is connected to the flat plate portion 41a of the frame portion 41 via the stepped portion 41b, and reaches the back side of the bottom portion 310. The plate portion 42 is fixed to the adjacent portion 310b of the bottom portion 310.
　また、板部４２には、底部３１０の裏側に配られたコードが掛けられるフック部が形成されている。具体的に、板部４２は、図５に示すように、表示用コードＣ１が掛けられる第１フック部Ｈ１と、光源用コードＣ２が掛けられる第２フック部Ｈ２と、を有する。ここで、表示用コードＣ１は、表示部１１と回路基板６０とを電気的に接続するＦＦＣ（Flexible Flat Cable）からなる。また、光源用コードＣ２は、光源用基板１３ｂと回路基板６０とを電気的に接続するリード線からなる。この実施形態では、第１フック部Ｈ１が１つ設けられ、第２フック部Ｈ２が複数設けられているが、第１フック部Ｈ１及び第２フック部Ｈ２の数、配置、形状は、コードの配設態様に応じて任意である。 Further, the plate portion 42 is formed with a hook portion on which the cord distributed on the back side of the bottom portion 310 can be hung. Specifically, as shown in FIG. 5, the plate portion 42 has a first hook portion H1 on which the display code C1 is hung, and a second hook portion H2 on which the light source code C2 is hung. Here, the display code C1 is composed of an FFC (Flexible Flat Cable) that electrically connects the display unit 11 and the circuit board 60. Further, the light source cord C2 is composed of a lead wire that electrically connects the light source substrate 13b and the circuit board 60. In this embodiment, one first hook portion H1 is provided and a plurality of second hook portions H2 are provided, but the number, arrangement, and shape of the first hook portion H1 and the second hook portion H2 are the cords. It is optional depending on the arrangement mode.
　光学素子５０は、表示部１１から反射部２０へ向かう表示光Ｌを透過させる公知の光学部材であり、板状をなす。光学素子５０は、図３に示すように、表示部１１の通過口３３側に位置する。光学素子５０は、例えば、反射防止のために設けられ、λ／４板（１／４波長板とも呼ばれる。）等の位相差板から構成されている。なお、光学素子５０は、ＡＲ（Anti?Reflection）フィルム又はＡＲ膜を有する透明板材、ホットミラーなどであってもよい。 The optical element 50 is a known optical member that transmits the display light L from the display unit 11 to the reflection unit 20, and has a plate shape. As shown in FIG. 3, the optical element 50 is located on the passage port 33 side of the display unit 11. The optical element 50 is provided for antireflection, for example, and is composed of a retardation plate such as a λ / 4 plate (also referred to as a 1/4 wave plate). The optical element 50 may be an AR (Anti? Reflection) film, a transparent plate material having an AR film, a hot mirror, or the like.
　光学素子５０は、図３に示すように、対向面５０ａが表示部１１の表示面１１ａに対して傾いた姿勢で、ホルダ１２と遮光部材４０の枠部４１とに挟持される。具体的に、光学素子５０は、図４に示すように、ホルダ１２の固定部１２ｃに貼り付けられた弾性部材Ｔを介して、ホルダ１２に固定されている（図４では光学素子５０を省略）。弾性部材Ｔは、板状をなし、例えば、弾性を有する両面テープから構成されている。弾性部材Ｔを介してホルダ１２に固定された光学素子５０は、対向面５０ａの反対面が枠部４１に設けられた３つの突起部Ｐ（図６参照）によってＺ方向に押圧される。このようにして、光学素子５０は、ホルダ１２と枠部４１とに挟持される。 As shown in FIG. 3, the optical element 50 is sandwiched between the holder 12 and the frame portion 41 of the light-shielding member 40 in a posture in which the facing surface 50a is tilted with respect to the display surface 11a of the display unit 11. Specifically, as shown in FIG. 4, the optical element 50 is fixed to the holder 12 via an elastic member T attached to the fixing portion 12c of the holder 12 (the optical element 50 is omitted in FIG. 4). ). The elastic member T has a plate shape and is made of, for example, an elastic double-sided tape. The optical element 50 fixed to the holder 12 via the elastic member T is pressed in the Z direction by the three protrusions P (see FIG. 6) provided on the frame portion 41 on the opposite surface of the facing surface 50a. In this way, the optical element 50 is sandwiched between the holder 12 and the frame portion 41.
　ここで、表示部１１に対する光学素子５０の傾きについて、図７を参照して説明する。表示面１１ａに対する対向面５０ａの角度βは、表示部１１から放射される表示光Ｌのうち、対向面５０ａで反射した後に表示面１１ａでさらに反射した光である二次反射光Ｌｓが反射部２０に到達しない角度に設定されている。角度βは、ＨＵＤ装置１００における光学系に応じて適切な値を任意に設定可能であるが、例えば５°～１５°の範囲内で設定することができる。 Here, the inclination of the optical element 50 with respect to the display unit 11 will be described with reference to FIG. 7. The angle β of the facing surface 50a with respect to the display surface 11a is such that, among the display lights L radiated from the display unit 11, the secondary reflected light Ls, which is the light reflected by the facing surface 50a and then further reflected by the display surface 11a, is the reflecting unit. The angle is set so that it does not reach 20. The angle β can be arbitrarily set to an appropriate value according to the optical system in the HUD device 100, but can be set, for example, in the range of 5 ° to 15 °.
　回路基板６０は、図５に示すように、底部３１０の基板配置部３１０ａに配置され、固定されている。回路基板６０は、各種回路が形成され、マイクロコンピュータからなる制御部が実装されたプリント回路板である。回路基板６０は、表示用基板１１ｂ及び表示用コードＣ１を介して、表示部１１と電気的に接続されている。また、回路基板６０は、光源用コードＣ２を介して、光源用基板１３ｂと電気的に接続されている。回路基板６０に実装された制御部は、ＨＵＤ装置１００の全体動作を制御するものであり、表示部１１の表示動作を制御するとともに、光源１３ａの発光動作を制御する。制御部は、車両１の各部を制御するＥＣＵ（Electronic Control Unit）などのシステムと通信を行い、車両情報を示す画像を表示部１１に表示させる。 As shown in FIG. 5, the circuit board 60 is arranged and fixed to the board arrangement portion 310a of the bottom portion 310. The circuit board 60 is a printed circuit board on which various circuits are formed and a control unit including a microcomputer is mounted. The circuit board 60 is electrically connected to the display unit 11 via the display board 11b and the display code C1. Further, the circuit board 60 is electrically connected to the light source substrate 13b via the light source cord C2. The control unit mounted on the circuit board 60 controls the overall operation of the HUD device 100, controls the display operation of the display unit 11, and controls the light emission operation of the light source 13a. The control unit communicates with a system such as an ECU (Electronic Control Unit) that controls each part of the vehicle 1, and causes the display unit 11 to display an image showing vehicle information.
　ケース３０の上方には、図示しないカバーガラスが設けられた上カバーが取り付けられる。反射部２０で反射した表示光Ｌは、カバーガラスを透過して、フロントガラス３へ向かう。また、ケース３０の下方には、回路基板６０等を下方から覆う、図示しない下カバーが取り付けられる。 An upper cover provided with a cover glass (not shown) is attached above the case 30. The display light L reflected by the reflecting unit 20 passes through the cover glass and heads toward the windshield 3. Further, a lower cover (not shown) that covers the circuit board 60 and the like from below is attached to the lower part of the case 30.
（１）以上に説明したＨＵＤ装置１００は、画像を表す表示光Ｌを放射する表示部１１と、表示部１１から放射された表示光Ｌをフロントガラス３（外部の透光部材の一例）に向けて反射させる反射部２０と、ケース３０と、遮光部材４０と、を備える。ケース３０は、表示部１１を収容する収容部３２、表示部１１から放射された表示光Ｌを通過させる通過口３３、及び、通過口３３から反射部２０へ至る表示光Ｌが表側を通過する底部３１０を有する。遮光部材４０は、表示部１１と通過口３３の間に位置する枠部４１、及び、底部３１０の裏側に固定される板部４２を有する。収容部３２は、表示部１１を表側から覆う覆い部３２０を有し、通過口３３は、覆い部３２０と底部３１０との間に形成されている。また、枠部４１は、通過口３３の縁に沿った形状をなす。板部４２は、コード（表示用コードＣ１、光源用コードＣ２）が掛けられるフック部（第１フック部Ｈ１、第２フックＨ２）を有する。そして、コードは、表示部１１と電気的に接続される表示用コードＣ１を含む。
　以上の構成によれば、表示部１１と通過口３３との間から、表示光Ｌが漏れ出すこと及び外光が入り込むことを抑制できるため、迷光を抑制できる。また、遮光部材４０にコードを掛けるフック部を設け、遮光部材４０に複数の機能を持たせるようにしたから、部品点数を削減することができ、構成を簡潔にすることができる。 (1) In the HUD device 100 described above, the display unit 11 that emits the display light L that represents an image and the display light L that is emitted from the display unit 11 are sent to the windshield 3 (an example of an external translucent member). A reflecting portion 20, a case 30, and a light-shielding member 40 are provided. In the case 30, the accommodating unit 32 accommodating the display unit 11, the passing port 33 through which the display light L radiated from the display unit 11 passes, and the display light L extending from the passing port 33 to the reflecting unit 20 pass through the front side. It has a bottom 310. The light-shielding member 40 has a frame portion 41 located between the display portion 11 and the passage port 33, and a plate portion 42 fixed to the back side of the bottom portion 310. The accommodating portion 32 has a covering portion 320 that covers the display portion 11 from the front side, and the passage port 33 is formed between the covering portion 320 and the bottom portion 310. Further, the frame portion 41 has a shape along the edge of the passage port 33. The plate portion 42 has hook portions (first hook portion H1, second hook H2) on which cords (display cord C1 and light source cord C2) are hung. The cord includes a display cord C1 that is electrically connected to the display unit 11.
According to the above configuration, it is possible to suppress the leakage of the display light L and the entry of external light from between the display unit 11 and the passage port 33, so that stray light can be suppressed. Further, since the light-shielding member 40 is provided with a hook portion for hooking the cord so that the light-shielding member 40 has a plurality of functions, the number of parts can be reduced and the configuration can be simplified.
（２）また、ＨＵＤ装置１００は、底部３１０の裏側に設けられ、表示用コードＣ１によって前記表示部１１と電気的に接続される回路基板６０を備える。
　この構成によれば、ケース３０の裏側に位置する回路基板６０へ至る表示用コードＣ１を、ケース３０の裏側に位置するフック部に掛けて整理することができるため、ケース３０の裏側における部品の組み付けが容易である。 (2) Further, the HUD device 100 includes a circuit board 60 provided on the back side of the bottom portion 310 and electrically connected to the display unit 11 by the display cord C1.
According to this configuration, the display code C1 leading to the circuit board 60 located on the back side of the case 30 can be hung on the hook portion located on the back side of the case 30 to be arranged, so that the parts on the back side of the case 30 can be arranged. Easy to assemble.
（３）また、ＨＵＤ装置１００は、収容部３２内に位置し、表示部１１を保持するホルダ１２と、表示部１１と通過口３３の間に位置し、表示光Ｌが透過する光学素子５０と、を備える。光学素子５０は、表示部１１と対向する対向面５０ａが、表示部１１の表示面１１ａに対して傾いた姿勢で、ホルダ１２と枠部４１とに挟持される。
　この構成によれば、遮光部材４０にさらに機能を持たせることができるため、部品点数を削減することができる。また、傾いた光学素子５０により、二次反射光Ｌｓが迷光となることを抑制することができる。 (3) Further, the HUD device 100 is located in the accommodating portion 32, is located between the holder 12 holding the display unit 11 and the display unit 11 and the passing port 33, and is an optical element 50 through which the display light L is transmitted. And. The optical element 50 is sandwiched between the holder 12 and the frame portion 41 in a posture in which the facing surface 50a facing the display unit 11 is tilted with respect to the display surface 11a of the display unit 11.
According to this configuration, the light-shielding member 40 can be further provided with a function, so that the number of parts can be reduced. Further, the tilted optical element 50 can suppress the secondary reflected light Ls from becoming stray light.
（４）二次反射光Ｌｓが迷光となることを抑制するに当たっては、表示面１１ａに対する対向面５０ａの角度は、表示部１１から放射される表示光Ｌのうち、対向面５０ａで反射した後に表示面１１ａでさらに反射した光である二次反射光Ｌｓが反射部２０に到達しない角度であることが好ましい。 (4) In suppressing the secondary reflected light Ls from becoming stray light, the angle of the facing surface 50a with respect to the display surface 11a is set after being reflected by the facing surface 50a of the display light L emitted from the display unit 11. It is preferable that the secondary reflected light Ls, which is the light further reflected by the display surface 11a, does not reach the reflecting portion 20.
（５）また、迷光をより効果的に低減する観点からは、枠部４１は、光学素子５０と通過口３３との間に生じる隙間を埋める形状を有していることが好ましい。 (5) From the viewpoint of more effectively reducing stray light, the frame portion 41 preferably has a shape that fills the gap generated between the optical element 50 and the passage port 33.
（６）光学素子５０は、ホルダ１２に弾性部材Ｔを介して固定されている。
　この構成により、光学素子５０の緩衝性を高めることができる。 (6) The optical element 50 is fixed to the holder 12 via an elastic member T.
With this configuration, the cushioning property of the optical element 50 can be enhanced.
（７）また、枠部４１は、光学素子５０に向かって突起する複数の突起部Ｐを有し、光学素子５０は、複数の突起部Ｐに押された状態でホルダ１２と枠部４１とに挟持されている。
　この構成により、光学素子５０を枠部４１に対し、ほぼ点接触の状態で良好に位置決めすることができる。 (7) Further, the frame portion 41 has a plurality of protrusions P protruding toward the optical element 50, and the optical element 50 has the holder 12 and the frame portion 41 in a state of being pushed by the plurality of protrusions P. It is sandwiched between.
With this configuration, the optical element 50 can be satisfactorily positioned with respect to the frame portion 41 in a state of substantially point contact.
　なお、本発明は以上の実施形態及び図面によって限定されるものではない。本発明の要旨を変更しない範囲で、適宜、変更（構成要素の削除も含む）を加えることが可能である。 The present invention is not limited to the above embodiments and drawings. Changes (including deletion of components) can be made as appropriate without changing the gist of the present invention.
　第１フック部Ｈ１と第２フック部Ｈ２の少なくともいずれかに掛けられるコードには、リード線、ＦＦＣだけに限られず、ＦＰＣ（Flexible Printed Circuit）が含まれていてもよい。 The cord hung on at least one of the first hook portion H1 and the second hook portion H2 is not limited to the lead wire and FFC, and may include an FPC (Flexible Printed Circuit).
　弾性部材Ｔは、ホルダ１２に固定することができれば、弾性を有する両面テープに限られず任意である。例えば、弾性部材Ｔは、接着等によりホルダ１２に固定される、発泡ウレタン等のスポンジ材、ゴムを含むエラストマー等であってもよい。 The elastic member T is not limited to the elastic double-sided tape and is arbitrary as long as it can be fixed to the holder 12. For example, the elastic member T may be a sponge material such as urethane foam, an elastomer containing rubber, or the like, which is fixed to the holder 12 by adhesion or the like.
　以上では、表示ユニット１０の表示部１１が液晶パネルからなる例を示したが、表示部１１及び表示ユニット１０の構成は限定されるものでなく任意である。例えば、表示部１１は、ＯＬＥＤ（Organic Light-Emitting Diode）から構成されていてもよい。また、表示ユニット１０は、ＤＭＤ（Digital Micromirror Device）と、ＤＭＤによる反射光を受けて画像を表示する透過型スクリーンからなる表示部１１と、を備えて構成されていてもよい。この場合、透過型スクリーンを表示面１１ａと考えることができる。 In the above, the example in which the display unit 11 of the display unit 10 is composed of a liquid crystal panel is shown, but the configuration of the display unit 11 and the display unit 10 is not limited and is arbitrary. For example, the display unit 11 may be composed of an OLED (Organic Light-Emitting Diode). Further, the display unit 10 may be configured to include a DMD (Digital Micromirror Device) and a display unit 11 including a transmissive screen that receives reflected light from the DMD and displays an image. In this case, the transmissive screen can be considered as the display surface 11a.
　ＨＵＤ装置１００をユーザ４に向けて反射する透光部材は、車両１のフロントガラス３に限定されず、板状のハーフミラー、ホログラム素子等により構成されるコンバイナであってもよい。 The translucent member that reflects the HUD device 100 toward the user 4 is not limited to the windshield 3 of the vehicle 1, and may be a combiner composed of a plate-shaped half mirror, a hologram element, or the like.
　ＨＵＤ装置１００が搭載される車両１の種類は限定されず、自動四輪車や、自動二輪車など様々な車両に適用可能である。また、ＨＵＤ装置１００は、航空機、船舶、スノーモービル等、車両１以外の乗り物に搭載されてもよい。 The type of vehicle 1 on which the HUD device 100 is mounted is not limited, and can be applied to various vehicles such as motorcycles and motorcycles. Further, the HUD device 100 may be mounted on a vehicle other than the vehicle 1, such as an aircraft, a ship, and a snowmobile.
　以上の説明では、本発明の理解を容易にするために、公知の技術的事項の説明を適宜省略した。 In the above description, in order to facilitate the understanding of the present invention, the description of known technical matters has been omitted as appropriate.
　１００…ヘッドアップディスプレイ（ＨＵＤ）装置
　１０…表示ユニット
　１１…表示部、１１ａ…表示面、１１ｂ…表示用基板
　１２…ホルダ、１２ａ…第１保持部、１２ｂ…第２保持部
　１２ｃ…固定部、Ｔ…弾性部材
　１３…照明部、１３ａ…光源、１３ｂ…光源用基板、１３ｃ…レンズ、１３ｄ…筐体
　２０…反射部
　３０…ケース
　３１…光路形成室
　３１０…底部、３１０ａ…基板配置部、３１０ｂ…隣接部、３１１…支持部
　３２…収容部、３２０…覆い部、３２１…壁部、３２１ａ…ヒートシンク
　３３…通過口
　４０…遮光部材
　４１…枠部、４１ａ…平板部、４１ｂ…段状部、Ｐ…突起部
　４２…板部
　Ｈ１…第１フック部、Ｈ２…第２フック部
　Ｃ１…表示用コード、Ｃ２…光源用コード
　５０…光学素子、５０ａ…対向面
　６０…回路基板
　１…車両、２…ダッシュボード、３…フロントガラス、４…ユーザ
　Ｌ…表示光、Ｖ…虚像、Ｌｓ…二次反射光 100 ... Head-up display (HUD) device 10 ... Display unit 11 ... Display unit, 11a ... Display surface, 11b ... Display board 12 ... Holder, 12a ... First holding unit, 12b ... Second holding unit 12c ... Fixed unit, T ... Elastic member 13 ... Illumination part, 13a ... Light source, 13b ... Light source substrate, 13c ... Lens, 13d ... Housing 20 ... Reflection part 30 ... Case 31 ... Optical path forming chamber 310 ... Bottom, 310a ... Board arrangement part, 310b ... Adjacent part, 311 ... Support part 32 ... Accommodating part, 320 ... Covering part, 321 ... Wall part, 321a ... Heat source 33 ... Passing port 40 ... Shading member 41 ... Frame part, 41a ... Flat plate part, 41b ... Stepped part, P ... Projection 42 ... Plate H1 ... 1st hook, H2 ... 2nd hook C1 ... Display code, C2 ... Light source code 50 ... Optical element, 50a ... Facing surface 60 ... Circuit board 1 ... Vehicle, 2 ... Dashboard, 3 ... Front glass, 4 ... User L ... Display light, V ... Void image, Ls ... Secondary reflected light

Claims (7)

  1. 　画像を表す表示光を放射する表示部と、
    　前記表示部から放射された前記表示光を外部の透光部材に向けて反射させる反射部と、
    　前記表示部を収容する収容部、前記表示部から放射された前記表示光を通過させる通過口、及び、前記通過口から前記反射部へ至る前記表示光が表側を通過する底部を有するケースと、
    　前記表示部と前記通過口の間に位置する枠部、及び、前記底部の裏側に固定される板部を有する遮光部材と、を備え、
    　前記収容部は、前記表示部を表側から覆う覆い部を有し、
    　前記通過口は、前記覆い部と前記底部との間に形成され、
    　前記枠部は、前記通過口の縁に沿った形状をなし、
    　前記板部は、コードが掛けられるフック部を有し、
    　前記コードは、前記表示部と電気的に接続される表示用コードを含む、
    　ヘッドアップディスプレイ装置。     A display unit that emits display light that represents an image,
    A reflective unit that reflects the display light radiated from the display unit toward an external translucent member, and a reflective unit.
    A case having a housing portion for accommodating the display unit, a passage port through which the display light radiated from the display unit is passed, and a bottom portion through which the display light from the passage port to the reflection unit passes through the front side.
    A frame portion located between the display portion and the passage port, and a light-shielding member having a plate portion fixed to the back side of the bottom portion are provided.
    The accommodating portion has a covering portion that covers the display portion from the front side.
    The passage port is formed between the cover portion and the bottom portion, and is formed.
    The frame portion has a shape along the edge of the passage port, and has a shape.
    The plate portion has a hook portion on which a cord can be hung.
    The cord includes a display cord that is electrically connected to the display unit.
    Head-up display device.
  2. 　前記底部の裏側に設けられ、前記表示用コードによって前記表示部と電気的に接続される回路基板を備える、
    　請求項１に記載のヘッドアップディスプレイ装置。     A circuit board provided on the back side of the bottom portion and electrically connected to the display portion by the display cord is provided.
    The head-up display device according to claim 1.
  3. 　前記収容部内に位置し、前記表示部を保持するホルダと、
    　前記表示部と前記通過口の間に位置し、前記表示光が透過する光学素子と、を備え、
    　前記光学素子は、前記表示部と対向する対向面が、前記表示部の前記画像が表示される表示面に対して傾いた姿勢で、前記ホルダと前記枠部とに挟持される、
    　請求項１又は２に記載のヘッドアップディスプレイ装置。     A holder that is located inside the housing and holds the display.
    An optical element located between the display unit and the passage port and through which the display light is transmitted is provided.
    The optical element is sandwiched between the holder and the frame portion in such a posture that the facing surface facing the display unit is tilted with respect to the display surface on which the image of the display unit is displayed.
    The head-up display device according to claim 1 or 2.
  4. 　前記表示面に対する前記対向面の角度は、前記表示部から放射される前記表示光のうち、前記対向面で反射した後に前記表示面でさらに反射した光である二次反射光が前記反射部に到達しない角度である、
    　請求項３に記載のヘッドアップディスプレイ装置。     The angle of the facing surface with respect to the display surface is such that, among the display lights radiated from the display unit, the secondary reflected light which is the light reflected by the facing surface and then further reflected by the display surface is reflected on the reflecting unit. It is an angle that cannot be reached,
    The head-up display device according to claim 3.
  5. 　前記枠部は、前記光学素子と前記通過口との間に生じる隙間を埋める形状を有する、
    　請求項３又は４に記載のヘッドアップディスプレイ装置。     The frame portion has a shape that fills a gap generated between the optical element and the passage port.
    The head-up display device according to claim 3 or 4.
  6. 　前記光学素子は、前記ホルダに弾性部材を介して固定されている、
    　請求項３乃至５のいずれか１項に記載のヘッドアップディスプレイ装置。     The optical element is fixed to the holder via an elastic member.
    The head-up display device according to any one of claims 3 to 5.
  7. 　前記枠部は、前記光学素子に向かって突起する複数の突起部を有し、
    　前記光学素子は、前記複数の突起部に押された状態で前記ホルダと前記枠部とに挟持されている、
    　請求項３乃至６のいずれか１項に記載のヘッドアップディスプレイ装置。     The frame portion has a plurality of protrusions protruding toward the optical element, and the frame portion has a plurality of protrusions.
    The optical element is sandwiched between the holder and the frame portion in a state of being pressed by the plurality of protrusions.
    The head-up display device according to any one of claims 3 to 6.
PCT/JP2021/018005 2020-05-19 2021-05-12 Head-up display device WO2021235284A1 (en)

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Citations (4)

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JP2017171041A (en) * 2016-03-22 2017-09-28 日本精機株式会社 Display device
JP2018075983A (en) * 2016-11-10 2018-05-17 日本精機株式会社 Head-up display device
US20190187470A1 (en) * 2017-12-20 2019-06-20 Volkswagen Aktiengesellschaft Vehicle with a head-up display integrated into the dashboard
JP2020006889A (en) * 2018-07-11 2020-01-16 日本精機株式会社 Vehicle display device

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Publication number Priority date Publication date Assignee Title
JP5556019B2 (en) 2009-01-27 2014-07-23 日本精機株式会社 Head-up display device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017171041A (en) * 2016-03-22 2017-09-28 日本精機株式会社 Display device
JP2018075983A (en) * 2016-11-10 2018-05-17 日本精機株式会社 Head-up display device
US20190187470A1 (en) * 2017-12-20 2019-06-20 Volkswagen Aktiengesellschaft Vehicle with a head-up display integrated into the dashboard
JP2020006889A (en) * 2018-07-11 2020-01-16 日本精機株式会社 Vehicle display device

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