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WO2019202864A1 - Affichage tête haute - Google Patents

Affichage tête haute Download PDF

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Publication number
WO2019202864A1
WO2019202864A1 PCT/JP2019/008687 JP2019008687W WO2019202864A1 WO 2019202864 A1 WO2019202864 A1 WO 2019202864A1 JP 2019008687 W JP2019008687 W JP 2019008687W WO 2019202864 A1 WO2019202864 A1 WO 2019202864A1
Authority
WO
WIPO (PCT)
Prior art keywords
image light
display
light
head
forming unit
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2019/008687
Other languages
English (en)
Japanese (ja)
Inventor
星野　茂樹
達也 中澤
佳佑 澤田
望 下田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxell Ltd
Original Assignee
Maxell Ltd
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 Maxell Ltd filed Critical Maxell Ltd
Publication of WO2019202864A1 publication Critical patent/WO2019202864A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
    • B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
    • B60K35/23—Head-up displays [HUD]
    • 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
    • B60K35/40—Instruments specially adapted for improving the visibility thereof to the user, e.g. fogging prevention or anti-reflection arrangements
    • B60K35/425—Anti-reflection arrangements
    • 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, and more particularly to a technique for suppressing the influence of sunlight incident on the head-up display.
  • HUD Head Up Display
  • Patent Document 1 discloses that “a display device emits display light representing an image, and display light emitted from the display enters and transmits the incident display light. And an external light reflection reducing unit disposed between the optical lens and the windshield, wherein the external light reflection reducing unit is a laminate of a linear polarizing plate and a ⁇ / 4 retardation plate.
  • the circularly polarizing plate is arranged so that the linearly polarizing plate is on the windshield side, and is arranged on the windshield side of the circularly polarizing plate, and transmits the display light and reflects the light other than the wavelength range of the display light.
  • a display device comprising a bandpass filter (summary excerpt) is disclosed.
  • Patent Document 1 it is inevitable that sunlight that has passed through a deflection filter or an AR filter is incident on an optical component of the HUD. Therefore, there is a fact that the influence of sunlight on the optical components depends on the filter performance, and there is room for further contrivance for reducing the influence of sunlight on the HUD.
  • the present invention has been made in view of the above circumstances, and an object thereof is to provide a head-up display that reduces the influence of sunlight incident on the HUD on optical components.
  • the present invention has the configuration described in the claims.
  • a head-up display an exterior casing, an image light forming unit that is housed in the exterior casing and forms and emits image light, and is formed in the exterior casing, A housing opening that emits light, an antiglare plate that covers the housing opening, and a concave mirror that reflects the image light toward the antiglare plate, and the image light is emitted from the antiglare plate.
  • the video light forming unit at a position retracted from the optical path of the sunlight that enters the interior of the exterior casing from the outgoing area and the optical path of the video light from the video light forming unit to the outgoing area of the anti-glare plate Is arranged.
  • FIG. 1 Schematic configuration diagram of HUD Schematic diagram showing the straight light path of sunlight and the arrangement of optical components in a conventional HUD Diagram showing the straight light path of sunlight in summer and winter, and the straight light path of diffusely reflected sunlight
  • Schematic diagram showing a modification of the first embodiment Schematic diagram showing a modification of the first embodiment
  • Schematic diagram showing a modification of the third embodiment The perspective view which shows the structure of HUD which concerns on 3rd Embodiment. Top surface perspective view which shows the structure of HUD which concerns on 3rd Embodiment.
  • HUD head-up display
  • FIG. 1 is a schematic configuration diagram of the HUD 1.
  • the HUD 1 is provided in a dashboard 4 provided in the vehicle 2.
  • the dashboard 4 includes a dashboard opening 7 for allowing the video light L emitted from the HUD 1 to pass therethrough.
  • the image light L is reflected by the windshield 3 of the vehicle 2 and enters the eyes of the driver 5.
  • the driver 5 visually recognizes the virtual image 80 by the image light L further forward than the windshield 3.
  • the projected member is not limited to the windshield 3, and other members such as a combiner may be used as long as the image light L is projected.
  • the HUD 1 includes an exterior housing 50, a display device 30 attached to the exterior housing 50, and a virtual image optical system 40 that magnifies and projects the video light L emitted from the display device 30.
  • the exterior housing 50 accommodates each element constituting the virtual image optical system 40.
  • the display device 30 includes an LCD (Liquid Crystal) that includes a backlight and a display surface 30a that is a display surface that displays an image, and that generates and emits image light by transmitting light emitted from the backlight. Display).
  • LCD Liquid Crystal
  • a casing opening 51 serving as an exit for the image light L is formed on the upper surface of the exterior casing 50.
  • the casing opening 51 is covered with an antiglare plate 52 for preventing dust and dust from entering the exterior casing 50.
  • the antiglare plate 52 is made of a member that transmits visible light.
  • a lens unit 43 and a concave mirror 41 are arranged in order from the position close to the display device 30 along the emission direction of the video light L.
  • the lens unit 43 is an assembly of lenses for adjusting the optical distance between the concave mirror 41 and the display device 30 and expanding the image light.
  • the concave mirror 41 is a member that reflects the image light L transmitted through the lens unit 43 toward the housing opening 51.
  • the concave mirror 41 is rotated by a mirror driving unit 42.
  • the mirror driving unit 42 adjusts the angle of the concave mirror 41 so that the image light L reflected by the concave mirror 41 passes through the antiglare plate 52 and reaches the windshield 3.
  • the mirror driving unit 42 is not an essential component, and the concave mirror 41 may be fixedly disposed in the exterior housing 50. In the following description, the mirror drive unit 42 is not shown for convenience of description.
  • the optical component is disposed in the exterior housing 50 at a position where the optical component is retracted from the straight light path of sunlight incident from the antiglare plate 52. Further, the optical component is disposed at a position where the image light L is retracted from the optical path from the display device 30 to the emission region 52 a of the antiglare plate 52. Thereby, the fall of the visibility of the virtual image 80 by sunlight is suppressed by devising the arrangement position of an optical component irrespective of an AR filter or a polarizing plate.
  • the “straight light path” means an optical path of sunlight that enters from the antiglare plate 52 and travels straight in the exterior housing 50 of the HUD 1 without being refracted or reflected. Therefore, even if the sunlight is irregularly reflected by the clouds during cloudy weather, the light path of the sunlight traveling straight in the HUD 1 corresponds to the straight traveling light path.
  • FIG. 2 is a schematic diagram showing a straight light path of sunlight and the arrangement of optical components in the conventional HUD 1.
  • the conventional HUD 1 accommodates the display device 30 and the lens unit 43 which are optical components constituting the image light forming unit 10 inside the lens barrel 11.
  • the lens barrel 11 and the concave mirror 41 are accommodated in the exterior housing 50.
  • a free-form surface mirror may be used as the concave mirror 41.
  • the lens barrel 11 is arranged at a position where the sunlight SL1 incident from the antiglare plate 52 enters the lens unit 43. In other words, since there is no obstruction in the straight light path from the antiglare plate 52 to the lens unit 43, the lens unit 43 can be viewed when looking into the HUD 1 from the outside of the exterior housing 50 through the antiglare plate 52.
  • the image light forming unit 10 may be any type of hardware as long as it forms image light such as an LCD, a projector, a MEMS element, a VFD (fluorescent display tube), and an organic EL.
  • the dashboard 4 is provided with a dashboard collar 4a that protrudes toward the dashboard opening 7.
  • sunlight SL2 is interrupted by the dashboard collar 4a and does not enter the interior of the HUD 1 from the antiglare plate 52.
  • the housing opening 51 also serves as an entrance for sunlight, a smaller one is preferable, but a minimum size is necessary for the luminous flux of the image light L to be emitted. Therefore, the image light forming unit 10 is retracted from the straight light path of the sunlight incident from the emission region 52a of the image light L on the anti-glare plate 52.
  • FIG. 3 is a diagram illustrating a straight light path of sunlight in summer and winter and a straight light path of sunlight that is irregularly reflected.
  • the image light forming unit 10 is shielded from the straight light path of the sunlight SLs and the straight light path of the diffused sunlight SLd when the south and middle altitudes in summer are high.
  • the first embodiment is an embodiment in which the image light forming unit 10 is retracted from the straight light paths of sunlight SLs and SLd and the light path of the image light L using the light shielding wall 70.
  • FIG. 4 is a schematic diagram showing the configuration of the HUD 1a according to the first embodiment.
  • the HUD 1a in FIG. 4 includes a light shielding wall 70 that protrudes toward the emission direction of the video light L from the lens unit 43 on the antiglare plate 52 side of the lens barrel 11.
  • the light shielding wall 70 is on the optical path of sunlight SLs and SLd that has passed through the anti-glare plate 52 and is disposed at the outermost part in the emission direction of the image light L in the anti-glare plate 52 and the image light forming unit 10. It arrange
  • the light shielding wall 70 is disposed at a position retracted from the optical path of the image light L deflected by the lens unit 43.
  • the position of the end of the light shielding wall 70 on the concave mirror 41 side relative to the lens unit 43 can be obtained from the design value based on the deflection angle of the lens unit 43.
  • FIG. 5 is a schematic diagram showing a modification of the first embodiment. 5 is different from the HUD 1a in FIG. 4 in that the light shielding wall 70 is formed by using the outer peripheral surface 11a of the lens barrel 11.
  • FIG. 6 is a schematic diagram showing a modification of the first embodiment. 6 is different from the HUD 1a in FIG. 4 in that the image light forming unit 10 is configured by the display device 30 and the lens unit 43 is not provided.
  • the display surface 30 a of the display device 30 is an emission surface of the outermost optical component of the image light forming unit 10. Therefore, the light shielding wall 70 is disposed on the straight light path that connects the display surface 30 a and the emission region 52 a of the image light L on the antiglare plate 52.
  • the straight light path of sunlight and the energy of sunlight in the HUD change depending on whether the altitude changes in the south and the south, the direct sunlight in fine weather, or the scattered light from the clouds in cloudy weather.
  • the HUD optical components are arranged at positions retracted from the straight light path of sunlight incident on the HUD and the optical path of image light, so that the sunlight incident on the HUD without hindering the emission of the image light. Is not directly applied to the optical component. Therefore, the influence of sunlight on the optical component can be reduced with high accuracy by the structure of the HUD without depending on the filter performance.
  • the second embodiment is an embodiment in which the video light forming unit 10 is retracted from the straight light path of the sunlight SL and the straight light path of the video light L using the concave mirror 41 in the HUD 1d that turns back the optical path of the video light L. is there.
  • FIG. 7 is a schematic diagram showing the configuration of the HUD according to the second embodiment.
  • the image light L emitted from the image light forming unit 10 is reflected by the folding mirror 45 toward the concave mirror 41.
  • the image light L reflected by the folding mirror 45 is reflected by the concave mirror 41 toward the antiglare plate 52.
  • the optical path length of the image light L becomes longer, and the virtual image 80 can be displayed further in front of the windshield 3.
  • the folding mirror 45 is a mirror that changes the traveling direction of the optical path, and is configured using, for example, a plane mirror.
  • the image light forming unit 10 is disposed on the back side of the concave mirror 41 rather than the straight light path VS1 that passes through the emission region 52a of the antiglare plate 52 and contacts the bottom side end of the concave mirror 41.
  • the sunlight SLd incident from the antiglare plate 52 does not enter the back side of the concave mirror 41 with respect to the straight light path VS1. Therefore, sunlight SLd does not enter the image light forming unit 10.
  • sunlight SLs and sunlight SLw do not enter the image light forming unit 10.
  • the third embodiment is an embodiment in which a light shielding wall 71 is arranged on a straight light path of sunlight SLd, SLs that enters from the anti-glare plate 52 and reaches the image light forming unit 10 in the HUD 1e that turns the optical path of the image light L. is there.
  • FIG. 8 is a schematic diagram showing the configuration of the HUD according to the third embodiment.
  • FIG. 9 is a schematic diagram showing a modification of the third embodiment.
  • the image light forming unit 10 is disposed at a position closer to the bottom of the outer casing 50 (surface opposite to the anti-glare plate 52) than the concave mirror 41 and retracted from the optical path of the image light L. Then, between the image light forming unit 10 and the concave mirror 41, in other words, the optical path of the image light L from the image light forming unit 10 to the folding mirror 45 and the optical path of the image light L from the folding mirror 45 to the concave mirror 41.
  • a light shielding wall 71 is provided in the gap.
  • the outermost optical component is the display surface 30 a of the display device 30.
  • HUD 8 and HUD 1f in FIG. 9 are arranged at a position where the image light forming unit 10 is closer to the folding mirror 45 than the HUD 1d in FIG. Thereby, compared with HUD1d and HUD1f, HUD1e can be reduced in size.
  • the HUD 1d and HUD 1f can form the optical path length of the image light L longer than the HUD 1e, so that the virtual image 80 can be displayed at a position farther from the driver 5 and the movement of the line of sight during driving can be reduced.
  • FIG. 10 is a perspective view of the HUD 1e.
  • FIG. 11 is a top perspective view of the HUD 1e.
  • the upper side of the folding mirror 45, the antiglare plate 52, and the outer casing 50 is not illustrated.
  • the HUDs 1a to 1d require the housing opening 51 that is covered with the emission region 52a of the image light L of the anti-glare plate 52 in order to display the virtual image 80.
  • sunlight SLd, SLs, and SLw enters the HUDs 1a to 1d from this opening.
  • the HUDs 1a to 1d are arranged at positions where the image light forming unit 10 is retracted from the straight light path of the sunlight SLd, SLs, SLw and the light path of the image light L, so that the sunlight SLd, SLs, SLw forms the image light.
  • the deterioration of the image quality of the virtual image 80 caused by entering the unit 10 can be suppressed.
  • the above embodiments are not intended to limit the present invention, and modifications within the scope of the present invention belong to the technical scope of the present invention.
  • the display device is not limited to the LCD but may be a MEMS.
  • the installation position of the image light forming unit 10 may be determined by setting the area including all the moving emission areas 52a as the emission areas 52a in the above embodiment.
  • HUD 2 Vehicle 3: Windshield 4: Dashboard 4 a: Dashboard saddle 5: Driver 7: Dashboard opening 10: Image light forming unit 11: Lens barrel 11a: Outer peripheral surface 30: Display device 30a: Display surface 40 : Virtual image optical system 41: Concave mirror 42: Mirror drive unit 43: Lens unit 43a: Lens exit surface 45: Folding mirror 50: Exterior housing 51: Housing opening 52: Anti-glare plate 52a: Exit region 70: Light shielding wall 71: Shading wall 80: Virtual image

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

Abstract

L'objectif de la présente invention est de fournir un affichage tête haute grâce auquel l'effet, sur un composant optique, de la lumière solaire incidente sur un affichage tête haute est réduit. Un affichage tête haute (1) comprend : un boîtier extérieur (50) ; une unité de formation de lumière vidéo (10) pour former et émettre une lumière vidéo, l'unité de formation de lumière vidéo (10) étant logée dans le boîtier extérieur (50) ; une ouverture de boîtier (51) à travers laquelle une lumière vidéo est émise, l'ouverture de boîtier (51) étant formée dans le boîtier extérieur (50) ; une plaque antireflet (52) pour recouvrir l'ouverture de boîtier (51) ; et un miroir concave (41) pour réfléchir la lumière vidéo vers la plaque antireflet (52) ; l'unité de formation de lumière vidéo (10) étant disposée dans une position non présente sur le trajet optique de propagation rectiligne de la lumière solaire incidente sur l'intérieur du boîtier extérieur et propagée de façon rectiligne à partir d'une région d'émission de la plaque antireflet (52) à partir de laquelle la lumière vidéo est émise, la position étant également non présente sur le trajet optique de la lumière vidéo atteignant la région d'émission de la plaque antireflet (52) à partir de l'unité de formation de lumière vidéo (10).
PCT/JP2019/008687 2018-04-18 2019-03-05 Affichage tête haute Ceased WO2019202864A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018080174A JP2021113834A (ja) 2018-04-18 2018-04-18 ヘッドアップディスプレイ装置
JP2018-080174 2018-04-18

Publications (1)

Publication Number Publication Date
WO2019202864A1 true WO2019202864A1 (fr) 2019-10-24

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PCT/JP2019/008687 Ceased WO2019202864A1 (fr) 2018-04-18 2019-03-05 Affichage tête haute

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WO (1) WO2019202864A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024195768A1 (fr) * 2023-03-23 2024-09-26 株式会社小糸製作所 Dispositif de projection d'image

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007086387A (ja) * 2005-09-22 2007-04-05 Nippon Seiki Co Ltd 車両用表示装置
JP2010164617A (ja) * 2009-01-13 2010-07-29 Sanyo Electric Co Ltd 投射型映像表示装置
DE102011105689A1 (de) * 2011-06-22 2012-12-27 Continental Automotive Gmbh Anzeigevorrichtung mit einem Flüssigkristalldisplay und Verfahren zum Schützen eines Flüssigkristalldisplays
US20140092481A1 (en) * 2012-09-28 2014-04-03 Delphi Technologies, Inc. Head-up display system with dynamic image field and brightness control
JP2015169661A (ja) * 2014-03-04 2015-09-28 株式会社デンソー ヘッドアップディスプレイ装置
JP2016011104A (ja) * 2014-06-06 2016-01-21 カルソニックカンセイ株式会社 ヘッドアップディスプレイ装置
DE102014214976A1 (de) * 2014-07-30 2016-02-04 Robert Bosch Gmbh Anzeigevorrichtung, Blickfeldanzeigesystem sowie Verfahren und Vorrichtung zum Betreiben einer solchen Anzeigevorrichtung
WO2017195741A1 (fr) * 2016-05-10 2017-11-16 日本精機株式会社 Dispositif d'affichage tête haute
WO2018029999A1 (fr) * 2016-08-08 2018-02-15 マクセル株式会社 Dispositif d'affichage tête haute

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007086387A (ja) * 2005-09-22 2007-04-05 Nippon Seiki Co Ltd 車両用表示装置
JP2010164617A (ja) * 2009-01-13 2010-07-29 Sanyo Electric Co Ltd 投射型映像表示装置
DE102011105689A1 (de) * 2011-06-22 2012-12-27 Continental Automotive Gmbh Anzeigevorrichtung mit einem Flüssigkristalldisplay und Verfahren zum Schützen eines Flüssigkristalldisplays
US20140092481A1 (en) * 2012-09-28 2014-04-03 Delphi Technologies, Inc. Head-up display system with dynamic image field and brightness control
JP2015169661A (ja) * 2014-03-04 2015-09-28 株式会社デンソー ヘッドアップディスプレイ装置
JP2016011104A (ja) * 2014-06-06 2016-01-21 カルソニックカンセイ株式会社 ヘッドアップディスプレイ装置
DE102014214976A1 (de) * 2014-07-30 2016-02-04 Robert Bosch Gmbh Anzeigevorrichtung, Blickfeldanzeigesystem sowie Verfahren und Vorrichtung zum Betreiben einer solchen Anzeigevorrichtung
WO2017195741A1 (fr) * 2016-05-10 2017-11-16 日本精機株式会社 Dispositif d'affichage tête haute
WO2018029999A1 (fr) * 2016-08-08 2018-02-15 マクセル株式会社 Dispositif d'affichage tête haute

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024195768A1 (fr) * 2023-03-23 2024-09-26 株式会社小糸製作所 Dispositif de projection d'image

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