WO2018198821A1 - Dispositif d'affichage tête haute - Google Patents

Dispositif d'affichage tête haute Download PDF

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Publication number
WO2018198821A1
WO2018198821A1 PCT/JP2018/015503 JP2018015503W WO2018198821A1 WO 2018198821 A1 WO2018198821 A1 WO 2018198821A1 JP 2018015503 W JP2018015503 W JP 2018015503W WO 2018198821 A1 WO2018198821 A1 WO 2018198821A1
Authority
WO
WIPO (PCT)
Prior art keywords
mirror
display
display device
head
display light
Prior art date
Application number
PCT/JP2018/015503
Other languages
English (en)
Japanese (ja)
Inventor
真哉 佐藤
勝己 中静
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 JP2019514385A priority Critical patent/JP7115471B2/ja
Publication of WO2018198821A1 publication Critical patent/WO2018198821A1/fr

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Classifications

    • 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—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
    • 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

Definitions

  • the present invention relates to a head-up display device having two mirrors whose mirror surfaces are both curved surfaces.
  • Some vehicles are equipped with a head-up display device that projects a virtual image in front of the driver and provides information to the driver.
  • a head-up display device one that reflects display light by a plurality of mirrors and guides it to a windshield is known.
  • Patent Document 1 As a conventional technique related to such a head-up display device, there is a technique disclosed in Patent Document 1.
  • a head-up display device includes a display that emits display light, a first mirror that reflects display light emitted from the display, and a display that is reflected by the first mirror.
  • a second mirror that reflects light, these indicators, and a case that houses the first and second mirrors are provided.
  • the mirror surface of the first mirror is formed in a concave shape so that the reflected display light crosses up and down before reaching the second mirror.
  • the case includes a first shielding portion and a second shielding portion that extend to the vicinity of a cross point where display light crosses.
  • the outside light such as sunlight is prevented from reaching the inside of the case by the first shielding part and the second shielding part. Most of the outside light is shielded by the first and second shielding parts, and cannot reach the first mirror or the display part.
  • Sunlight countermeasures can be taken without using a shutter or a reflective polarizing film.
  • the aspect ratio which is the aspect ratio of the virtual image that is projected, differs depending on the vehicle type and vehicle on which the head-up display device is mounted. Since the display mounted on the head-up display device is expensive, the head-up display device becomes expensive when designed for each vehicle type or vehicle.
  • An object of the present invention is to provide an inexpensive head-up display device.
  • the display that emits the display light
  • the first mirror that reflects the display light emitted from the display
  • the second that reflects the display light reflected by the first mirror.
  • a mirror, the display, and a case for housing the first and second mirrors
  • the mirror surface of the first mirror has a substantially rectangular shape in front view and is formed in a concave surface along the short axis
  • the curvature of the concave surface is a curvature that causes the reflected display light to cross up and down before reaching the second mirror
  • the mirror surface of the second mirror is formed as a concave surface that reflects the received display light
  • the case includes a first shielding portion and a second shielding portion that extend to the vicinity of the crossing point that crosses the optical path between the first and second mirrors,
  • the head-up display device in which outside light entering the case from outside the case, reflected by the second concave mirror, and directed to the first concave mirror is shielded by the first and second shielding portions,
  • the mirror surface of the first mirror is formed in a curved shape along the longitudinal axis.
  • the length of the projected virtual image in the longitudinal direction can be adjusted by the curvature of the curved surface.
  • the curvature of the short axis must be such that the display light crosses before reaching the second mirror.
  • the curvature of the first mirror in the short direction is defined by the size of the case and the like. For this reason, it is difficult to change the setting for each vehicle type or vehicle on which the head-up display device is mounted.
  • the aspect ratio can be set to an arbitrary value by adjusting the length in the longitudinal direction. There is no need to prepare an expensive indicator for each vehicle type or vehicle. An inexpensive head-up display device can be provided.
  • FIG. 1 is a basic configuration diagram of a head-up display device according to an embodiment of the present invention. It is sectional drawing of the head-up display apparatus based on the Example of this invention.
  • FIG. 3 is an exploded view of the head-up display device shown in FIG. 2. It is a figure explaining the 1st mirror shown by FIG. It is a top view of the 1st mirror by the example of a change. It is a figure explaining the shielding effect
  • left and right refer to the left and right with reference to the operator of the head-up display device
  • front and rear refer to the front and rear with reference to the traveling direction of the vehicle on which the head-up display device is mounted.
  • Fr indicates the front
  • Rr indicates the rear
  • Le indicates the left when viewed from the occupant
  • Ri indicates the right when viewed from the occupant
  • Up indicates the upper side
  • Dn indicates the lower side.
  • the head-up display device 10 is arranged on a light source 11 and emits display light 12, a first mirror 14 that reflects display light 12 emitted from the display 13, and the first mirror 14.
  • a second mirror 16 that reflects the display light 15 reflected by the windshield (windshield) 66 of the vehicle, and a case 20 that houses the light source 11, the display 13, and the first and second mirrors 14 and 16. It is equipped with.
  • the first mirror 14 has a concave surface (a reciprocal of the radius) that causes the reflected display light 15 to cross up and down before reaching the second mirror 16.
  • the second mirror 16 has a concave surface that magnifies and reflects the received display light, and this concave surface also serves to correct the distortion of the virtual image due to the curvature of the windshield of the vehicle. That is, the first mirror 14 has a curvature such that the focal point of the first mirror 14 is located between the first mirror 14 and the second mirror 16. In other words, the distance from the first mirror 14 to the second mirror 16 is set to be longer than the focal length of the first mirror 14.
  • the case 20 includes a first shielding part 23 and a second shielding part 24 that extend to the vicinity of the crossing point 22 that crosses the optical path 21 between the first and second mirrors 14 and 16. External light 25 that enters the case 20 from outside the case 20, is reflected by the second mirror 16, and travels toward the first mirror 14 can be shielded by the first and second shielding portions 23 and 24.
  • the lower end (front end portion) of the first shielding portion 23 connects at least the upper end portion P1 of the reflection region of the display light 12 in the first mirror 14 and the upper end portion P2 of the reflection region of the display light 15 in the second mirror 16. It is located on the cross point 22 side (lower side) with respect to the elliptical line segment L1.
  • the upper end (tip portion) of the second shielding part 24 connects at least the lower end part P3 of the reflection area of the display light 12 in the first mirror 14 and the lower end part P4 of the reflection area of the display light 15 in the second mirror 16. It is located closer to the cross point 22 (upper side) than the ellipse segment L2.
  • first and second shielding parts 23 and 24 extend so that their tips approach each other. The closer the tips are, the higher the shielding property of the external light 25, which is desirable. That is, it is desirable that the tips of each other are close to the cross point 22 (focal point).
  • the case 20 includes a center frame 30 that supports the first and second mirrors 14 and 16 and includes a second shielding portion 24, an upper cover 50 that is mounted on the center frame 30 and includes the first shielding portion 23, and a center.
  • a lower cover 55 attached under the frame 30.
  • the center frame 30 is an aluminum die-cast product having mounting flanges 31 and 31 on the outer periphery and a second shielding part 24 extending obliquely upward inside.
  • a stay 32 is welded to the center frame 30, and the first mirror 14 is fixed to the stay 32 with an adhesive layer 33.
  • the second mirror 16 is fixed to the stays 34 to 36 welded to the inner surface of the center frame 30 with adhesive layers 37 to 39.
  • the center frame 30 is an aluminum die-cast product, the strength is much higher than that of a resin molded product, and the rigidity is high. Since the first and second mirrors 14 and 16 and the display 13 are collectively attached to the rigid center frame 30, it is difficult to adjust these optical axes. Furthermore, the rigid center frame 30 is attached to the vehicle by attachment flanges 31 and 31. If the cover is entirely made of resin, the rigidity may be insufficient and the optical axis may need to be readjusted. On the other hand, since the head-up display device 10 of the embodiment is rich in rigidity, the concern is small.
  • the upper cover 50 is, for example, a polycarbonate molded product, and includes a cover glass 51 on the upper surface and integrally includes a first shielding portion 23 that extends obliquely downward.
  • the lower cover 55 is a bottomed cylindrical body that opens upward, and is, for example, an ABS resin molded product and includes a printed circuit board 56.
  • the lower cover 55 is attached to the center frame 30 with screws 57 and 57 from below, and the upper cover 50 is attached with screws 52 from above.
  • FIG. 4A shows the first mirror 14 as viewed from the front.
  • the mirror surface of the first mirror 14 has a substantially rectangular shape in front view of the first mirror 14.
  • FIG.4 (b) is a 4b arrow line view of Fig.4 (a).
  • the mirror surface of the first mirror 14 is formed in a convex shape with a central portion in the longitudinal direction protruding toward the second mirror 16 (see FIG. 2). That is, the mirror surface of the first mirror 14 is formed in a curved shape along the longitudinal axis.
  • FIG. 5 shows a first mirror 74 according to a modification.
  • the mirror surface of the first mirror 74 is formed in a concave shape so that the central portion in the longitudinal direction is away from the second mirror 16 (see FIG. 2). That is, the mirror surface of the first mirror 74 is formed in a curved shape along the longitudinal axis.
  • the display light 12 emitted from the display device 13 is reflected by the first mirror 14, and the display light 15 reflected by the first mirror 14 passes between the first and second shielding portions 23 and 24, It reaches the second mirror 16.
  • the display light 17 reflected by the second mirror 16 rises and reaches the windshield 66 of the vehicle (projection unit 66 on which the reflected display light 17 is projected).
  • the external light 25 represented by sunlight passes through the cover glass 51 and is reflected by the second mirror 16, and is reflected by the first shielding unit 23. Shielded. Since the 1st shielding part 23 is a polycarbonate excellent in heat resistance, the intensity
  • the external light 25 passes through the cover glass 51, is reflected by the second mirror 16, and is shielded by the second shielding part 24, as shown in FIG. Since the 2nd shielding part 24 is aluminum which is further excellent in heat resistance, the intensity
  • the curvature of the short axis (vertical side) of the first mirror 14 needs to be such that the display light crosses before reaching the second mirror 16. For this reason, the curvature of the short direction of the 1st mirror 14 is prescribed
  • FIG. 7A shows the first mirror 14 having a convex central portion in the longitudinal direction.
  • the length of the projected image is horizontal b1 and vertical a1.
  • the second mirror 16 has a horizontal width of the image displayed by the display unit 13. Can be reduced. That is, the aspect ratio of the projected image can be adjusted by adjusting the curvature (curvature radius) of the convex surface. In this case, the aspect ratio is b1: a1.
  • FIG. 7B shows a first mirror 74 having a concave central portion in the longitudinal direction.
  • the length of the projected image is horizontal b2 and vertical a1.
  • the second mirror 16 has a horizontal width of the image displayed by the display unit 13.
  • the aspect ratio of the projected image can be adjusted by adjusting the curvature (curvature radius) of the concave surface.
  • the aspect ratio is b2: a1.
  • the images projected by the first mirrors 14 and 74 having the same curvature in the short-side direction have the same length in the vertical direction (short-side direction) of a1. That is, in the present invention, the length of the image in the short direction is set to a1, and the length in the longitudinal direction is adjusted by adjusting the curvature in the lateral direction (longitudinal direction) of the first mirrors 14 and 74. Set to value. Thereby, the projected image can be set to a desired aspect ratio.
  • the mirror surface of the first mirror 14 is formed in a curved shape along the longitudinal axis.
  • the length of the projected virtual image in the longitudinal direction can be adjusted by the curvature of the curved surface.
  • the curvature of the short axis must be such that the display light crosses before reaching the second mirror 16.
  • the curvature of the first mirror 14 in the short direction is defined by the size of the case 20 and the like. For this reason, it is difficult to change the setting for each vehicle type or vehicle on which the head-up display device 10 is mounted.
  • the aspect ratio can be set to an arbitrary value by adjusting the length in the longitudinal direction. There is no need to prepare an expensive indicator 13 for each vehicle type or vehicle.
  • An inexpensive head-up display device 10 can be provided.
  • the shape of the second mirror 16 is determined by the distance to the windshield on which the image is projected. Also in this respect, the aspect ratio is preferably adjusted by the first mirror 14.
  • the head-up display device of the present invention is suitable for passenger cars, but may be applied to other vehicles and construction equipment such as ordinary vehicles, ships, and aircraft. That is, the present invention is not limited to the examples as long as the operations and effects of the present invention are exhibited.
  • the head-up display device of the present invention is suitable for passenger cars.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Instrument Panels (AREA)

Abstract

Le but de la présente invention est de fournir un dispositif d'affichage tête haute à faible coût. À cet effet, l'invention concerne un dispositif d'affichage tête haute (10) de la présente invention comprenant : un écran (13) qui émet une lumière d'affichage ; un premier miroir (14) qui réfléchit la lumière d'affichage émise par l'écran (13) ; un second miroir (16) qui réfléchit la lumière d'affichage réfléchie par le premier miroir (14) ; et un boîtier (20) qui loge l'écran (13) et les premier et second miroirs (14, 16). La surface de miroir du premier miroir (14) a une forme sensiblement rectangulaire en vue avant, et présente une forme de surface incurvée le long de l'axe longitudinal.
PCT/JP2018/015503 2017-04-27 2018-04-13 Dispositif d'affichage tête haute WO2018198821A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019514385A JP7115471B2 (ja) 2017-04-27 2018-04-13 ヘッドアップディスプレイ装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-088353 2017-04-27
JP2017088353 2017-04-27

Publications (1)

Publication Number Publication Date
WO2018198821A1 true WO2018198821A1 (fr) 2018-11-01

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ID=63918264

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/015503 WO2018198821A1 (fr) 2017-04-27 2018-04-13 Dispositif d'affichage tête haute

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JP (1) JP7115471B2 (fr)
WO (1) WO2018198821A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022044855A (ja) * 2020-09-08 2022-03-18 矢崎総業株式会社 車両用表示装置
DE112021005530T5 (de) 2020-10-20 2023-08-10 Nippon Seiki Co., Ltd. Head-up-Display-Vorrichtung
WO2024004297A1 (fr) * 2022-06-28 2024-01-04 マクセル株式会社 Dispositif d'affichage tête haute

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05341226A (ja) * 1992-06-11 1993-12-24 Fujitsu Ltd ヘッドアップ表示装置
JPH1115420A (ja) * 1997-06-26 1999-01-22 Yazaki Corp 車両用表示装置
JP2016103008A (ja) * 2014-11-12 2016-06-02 日本精機株式会社 ヘッドアップディスプレイ装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5311357A (en) * 1992-01-28 1994-05-10 Image Technology Associates Device for the creation of three-dimensional images

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05341226A (ja) * 1992-06-11 1993-12-24 Fujitsu Ltd ヘッドアップ表示装置
JPH1115420A (ja) * 1997-06-26 1999-01-22 Yazaki Corp 車両用表示装置
JP2016103008A (ja) * 2014-11-12 2016-06-02 日本精機株式会社 ヘッドアップディスプレイ装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2022044855A (ja) * 2020-09-08 2022-03-18 矢崎総業株式会社 車両用表示装置
JP7163344B2 (ja) 2020-09-08 2022-10-31 矢崎総業株式会社 車両用表示装置
DE112021005530T5 (de) 2020-10-20 2023-08-10 Nippon Seiki Co., Ltd. Head-up-Display-Vorrichtung
US11960080B2 (en) 2020-10-20 2024-04-16 Nippon Seiki Co., Ltd. Head-up display device
WO2024004297A1 (fr) * 2022-06-28 2024-01-04 マクセル株式会社 Dispositif d'affichage tête haute

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JPWO2018198821A1 (ja) 2020-03-12
JP7115471B2 (ja) 2022-08-09

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