WO2017186806A1 - Dispositif d'affichage tête haute pour véhicule automobile, muni d'un élément optique holographique - Google Patents

Dispositif d'affichage tête haute pour véhicule automobile, muni d'un élément optique holographique Download PDF

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Publication number
WO2017186806A1
WO2017186806A1 PCT/EP2017/059961 EP2017059961W WO2017186806A1 WO 2017186806 A1 WO2017186806 A1 WO 2017186806A1 EP 2017059961 W EP2017059961 W EP 2017059961W WO 2017186806 A1 WO2017186806 A1 WO 2017186806A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical element
holographic optical
display device
head
light
Prior art date
Application number
PCT/EP2017/059961
Other languages
German (de)
English (en)
Inventor
Christian Wall
Original Assignee
Audi Ag
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 Audi Ag filed Critical Audi Ag
Publication of WO2017186806A1 publication Critical patent/WO2017186806A1/fr

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Classifications

    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • 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
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • 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
    • G02B27/0103—Head-up displays characterised by optical features comprising holographic elements
    • G02B2027/0105—Holograms with particular structures
    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/015—Head-up displays characterised by mechanical features involving arrangement aiming to get less bulky devices
    • 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
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G02B2027/0154—Head-up displays characterised by mechanical features with movable elements
    • G02B2027/0159—Head-up displays characterised by mechanical features with movable elements with mechanical means other than scaning means for positioning the whole image
    • 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
    • G02B27/0179—Display position adjusting means not related to the information to be displayed
    • G02B2027/0181—Adaptation to the pilot/driver
    • 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
    • G02B2027/0192—Supplementary details
    • G02B2027/0198—System for aligning or maintaining alignment of an image in a predetermined direction

Definitions

  • the invention relates to a head-up display device for a motor vehicle with a holographic optical element.
  • head-up display devices are increasingly being installed.
  • a head-up display device is also referred to as a "head-up display” (“HUD”), and is a display device in which the user can maintain his head posture because his information is from an on-board system of the motor vehicle Field of view is projected.
  • the head-up display device may also be referred to as a "head-up display device”.
  • the head-up display device is positioned in a cockpit in front of the driver in a space.
  • the switchboard has for this purpose an opening in the area of a combination hatch, which is closed after mounting the head-up display device with a panel.
  • the so-called "eyebox" can be tracked in the vehicle, whereby the eyebox is the area or viewing area in which the user's eye point lies, that is to say the area in
  • a first primary mirror is generally rotated about an axis along a transverse axis of the motor vehicle, the so-called Y-axis.
  • DE 10 2014 200 377 A1 describes a visual field display for a vehicle for displaying image information in two independent images for a viewer.
  • a device for deflecting a projection of the first image and / or a projection of the second image is positioned spatially separated from a reflector in a beam path.
  • a customization of the field of view is not provided by this document.
  • DE 10 201 1 075 884 A1 describes the use of a holographic optical element in a field of view display as a projection display. This holographic projection display is arranged in the area of the lens root and the holographic optical element is used as a projection surface which displays a real image that is visible to the user. Again, this document does not address the issue of adapting a field of view.
  • DE 10 2012 200 867 A1 proposes to pivot a combiner with a holographic reflection layer.
  • the look-down angle is an angle between the horizon to a selected image and the angle to the road surface resulting from an user's eye position, so changing the look-down angle will change a position of the virtual image to include information displayed is shifted in an augmented reality, so that, for example, in the representation of a navigation arrow from the perspective of the user is no longer on the road.
  • An object underlying the invention is the improved adaptation of a user-specific altitude of the eyebox.
  • the invention is based on the idea of arranging a rotatably mounted holographic optical element in a housing of a head-up display device.
  • This holographic optical element may preferably be placed in place of a rotatable main mirror.
  • the head-up display device according to the invention for a motor vehicle has a housing, a projection device arranged in the housing for projecting a virtual image onto a projection surface located outside the housing and a deflection device arranged in the housing for deflecting a light emitted by the projection device.
  • a projection device is an optical device or an optical device component, with which or with which a virtual image can be projected onto the projection surface, for example a windshield or a combination lens, lying outside the housing.
  • the projection device can be designed, for example, as a projector or other imager.
  • the deflection device is a device or a component that can deflect a light beam.
  • the deflection device comprises a housing which is rotatably mounted in the housing and has a holographic optical element which is aligned such that it deflects the light of the projection device within the housing onto the projection surface.
  • the deflection device may additionally comprise a mirror or have only the holographic optical element.
  • a holographic optical element is a component or a component whose holographic properties are used for the optics of devices.
  • the holographic optical element may comprise, for example, a Fresnel zone plate.
  • the head-up display device makes possible an expanded reality with a constant altitude of the virtual image when adapting a field of view to user-specific needs. This improves the presentation of augmented reality, especially for very large users or very small users.
  • a main mirror of the head-up display device can be replaced.
  • the look-down angle does not change or only slightly changes as a function of a rotational mounting of the holographic optical element.
  • the holographic optical element may have a rotational position-dependent reflection properties with respect to the light and thereby act on the light as a virtual mirror surface, wherein a virtual linear displacement along a propagation direction of the light by means of the rotational position of holographic optical element is adjustable.
  • the linear displacement favors the above-mentioned aspect, according to which a position of the virtual image on the projection surface does not change or changes only slightly. Also, the disadvantages of the prior art described above are eliminated or alleviated.
  • the holographic optical element can be arranged in the housing in such a way that an axis of rotation of the holographic optical element extends perpendicular to a beam path plane, that of the projecting device coming portion of a beam path of the light and a deflected by the holographic optical element portion of the beam path the light is formed.
  • the axis of rotation runs in a vehicle transverse direction when the head-up display device is installed in the motor vehicle. As a result, a vote of head-up display device and projection surface is achieved.
  • the holographic optical element is designed to deflect the light into a deflection angle that corresponds to an angle of incidence of the light on the holographic optical element and / or the virtual mirror surface of the holographic optical element.
  • the change of the look-down angle when rotating the holographic optical element is then particularly low.
  • the holographic optical element is arranged to redirect only a limited number of predetermined wavelengths of a light beam applied to the holographic optical element, the images which combine to form the hologram can be provided.
  • the holographic optical element is mounted continuously rotatable. This allows a high variability of different layers of a light field.
  • the latter can detect a sensor device for detecting an eye position of the user, as well as a control device which is adapted to rotate the holographic optical element in dependence on a signal of the sensor device.
  • the control device can be set up in dependence on the signal of the Sensor device to change a rotational position of the holographic optical element.
  • the sensor device is a component or a device component which has a sensor. Such a sensor can be configured, for example, as a camera.
  • the above object is also achieved by a method for adjusting a beam path of a head-up display device according to one of the embodiments described above to an eye position of the user.
  • the controller may then receive a control signal describing a desired height offset of a field of view about the user's eye position and causing the holographic optical element to rotate about the axis of rotation in response to the control signal.
  • the control signal can be generated, for example, by an operating device of a motor vehicle or by the sensor device.
  • control device can generate the control signal as a function of a signal of a sensor device. This allows automatic adjustment of the Eyebox.
  • a motor vehicle which may be preferably designed as a motor vehicle, for example as a passenger car, wherein the motor vehicle has a head-up display device according to one of the embodiments described above.
  • FIG. 4 shows a schematic sketch of an embodiment of a head-up display device according to the invention.
  • FIG. 1 schematically illustrates a first embodiment of a head-up display device 10 according to the invention for a motor vehicle 20.
  • the motor vehicle 20 may preferably be designed as a motor vehicle, preferably as a passenger car.
  • the motor vehicle 20 has a windscreen which serves as a projection surface 12.
  • the head-up display device 10 has a housing 14, which can be arranged, for example, in a combination hat of the motor vehicle 20.
  • a projection device 16 is arranged, for example, a projector or other, designed as an imager device.
  • the head-up display device 10 likewise has a deflection device 18 arranged in the housing 14.
  • the deflection device 18 may, for example, not only have a holographic optical element 22, but additionally a deflection mirror 24.
  • the deflecting device 18 may also comprise only one holographic optical element 22.
  • the deflection device 18 also comprises a deflection mirror 24 in addition to the holographic optical element 22, the deflection mirror 24 is preferably a secondary mirror and the holographic optical element is preferably arranged instead of a main mirror.
  • Deflection mirror 24 can be used a deflection mirror 24 known to those skilled in the art.
  • the holographic optical element 22 is rotatably mounted in the housing 14.
  • the holographic optical element 22 may, for example, be connected to a carrier plate (not shown in FIG. 1), which is arranged in the housing 14 via a rotary bearing.
  • a corresponding mechanism of a rotary bearing or radial bearing is known to the skilled person from the prior art.
  • the head-up display device 10 may, for example, have a control device 26, which may be designed, for example, as a microchip or control board.
  • the control device 26 can then adjust, for example, a rotational position of the holographic optical element 22.
  • a sensor device 28 may be provided in the motor vehicle 20 that can detect and / or determine, for example, an eye level or an eye point of a user.
  • the sensor device 28 can be designed as a camera, which can be arranged on a headliner of the motor vehicle 20, and configured to detect a spatial position of an eye 30 of the user.
  • the sensor signal can then be transmitted to the control device 26.
  • the control device 26 can then rotate the holographic optical element 22 into a suitable position as a function of the sensor signal, that is, as a function of the position of the eye 30.
  • the controller 26 may receive a control signal from an operator (not shown in FIG. 1) describing a desired height offset of the field of view about the user's eye position.
  • the user can enter an adjustment of the field of view, for example by means of an operating device of a combination instrument or an infotainment system.
  • a holographic optical element 22 is an element whose holographic properties are used for optics in devices. As a result, conventional lenses, mirrors and prisms can be replaced with holograms.
  • the holographic optical element 22 may, for example on a side facing a light beam 34, comprise a Fresnel zone plate (zone lens) and / or a prior art person skilled in the art. knew film foil to provide a hologram.
  • a diffractive structure of the holographic optical element 22 may be made of a reflective material or a specially developed photographic layer.
  • film foils which can divide a light beam 34 into its spectral color, but only those light beams which are incident within a certain wavelength range are diffracted. Preferably, it is possible to reflect that light which lies in the visible range.
  • the holographic optical element 22 may be designed as a planar mirror, a concave mirror or a diffuser so that the light is reflected so that an angle of incidence of the light beam 34 corresponds to an angle of incidence of the light beam 34.
  • the rotation of the holographic optical element 22 can take place about an axis of rotation, which can preferably run in a vehicle head-mounted direction in a built-in head-up display device 10. In the case of FIG. 1, the axis of rotation then runs perpendicular to the image plane of FIG. 1. Due to the rotatable mounting of the holographic optical element within the housing, a mirror plane for the virtual image is linearly displaced as the pivot bearing is changed, without the virtual image changing significantly in its position on the projection surface.
  • the reflection properties of the holographic optical element 22 with respect to the light beam 34 depend on a rotational position of the holographic optical element 22 in such a way that it also acts on the light beam 34 like a virtual mirror surface 36 ', 36 ", 36"'.
  • FIG. 1 shows, by way of example, the respective position of a virtual mirror surface 36 ', 36 “, 36"', which can result at different rotational positions of the holographic optical element 22.
  • various Eyeboxlagen 38 ', 38 ", 38"' are shown in FIG. 1 by way of example.
  • the holographic optical element 22 may, for example, be mounted in a first position, in which the corresponding virtual mirror surface 36' may be located at a small distance from the surface of the holographic optical element 22.
  • the holographic optical element 22 may be rotated, for example, such that the corresponding virtual mirror surface 36" lies farther away from the surface of the holographic optical element 22 as the previously described virtual mirror surface 36 '.
  • This virtual mirror surface 36 " can direct the thus deflected light beam 34 'to a point 40' of the projection surface 12 so that the virtual image plane 42 'appears in the same position or almost the same position as in the previously described example
  • the virtual image planes 42 ' are shown slightly shifted In a third example, it may be intended to set a very high-lying eyebox 38 "'.
  • the corresponding virtual mirror surface 36 "' can deflect the light beam 34 (34') such that it is directed to a point 40"', the virtual image plane 42' again being at the same or near same position as in the previous examples.
  • FIG. 1 thus illustrates a linear displacement of the virtual mirror surface 36 ', 36 ", 36,”' on a displacement vector 44 as a function of the rotational position of the holographic optical element 22.
  • the rotation of the holographic optical element results 22 a linear displacement of the virtual mirror surface 36 ', 36 ", 36"'.
  • a constant or nearly constant position of a virtual image plane 42 'of the reflected virtual image results in a height shift of the position of the eyebox 38', 38 ", 38" '.
  • FIGS. 2, 3 and 4 again illustrate details of a linear displacement of the virtual mirror surface 36 ', 36 ", 36"', whereby the "virtual mirror surface” can also be referred to as "mirror plane".
  • the holographic optical element 22 the optional deflection mirror 24 and the light beam 34, as well as the virtual mirror surface 36 ', 36 ", 36"' are shown in FIGS. 2, 3 and 4.
  • a corresponding head-up display device 10 may be, for example, a head-up display device 10 of FIG. 1.
  • the light beam 34 can in each case be directed by the projection device 16 onto the optional deflection mirror 24 and deflected by the latter onto the holographic optical element 22.
  • FIG. 2 shows the holographic optical element 22 in a zero position or initial position.
  • a corresponding mirror plane 36 ' can lie on the holographic optical element 22.
  • the holographic optical element 22 may be rotated clockwise and in a second position 22 '.
  • the zero position 22 is shown in FIG. 3 for comparison purposes. If the holographic optical element 22 is in this rotated position 22 ', then a corresponding mirror plane 36 "may lie in front of the holographic optical element 22' with respect to the light beam 34.
  • FIG. 4 shows a holographic optical element 22 "which may be positioned counterclockwise in comparison to the holographic optical element 22 in the null position of FIG. 2.
  • the virtual mirror surface 36" may then be placed behind the holographic optical element 22 ". lie.
  • the above-mentioned embodiments illustrate the principle of the head-up display device 10 according to the invention to form a main mirror by a special holographic optical element 22.
  • This holographic optical element 22 is placed in place of the rotatable main mirror and is also rotatably mounted.
  • the holographic optical element 22 may have the property of reflecting light of a specific wavelength. Another property of the holographic optical element may be to respond upon rotation of the holographic optical element 22 about an axis of rotation with a linear displacement of the mirror plane 36 ', 36 ", 36"'. Another possibility is to design the holographic optical element 22 such that upon rotation about the axis of rotation the mirror plane 36 ', 36 ", 36"' can be freely displaced or rotated.
  • augmented reality head-up display devices can be provided with a constant elevation of the virtual image.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instrument Panels (AREA)

Abstract

L'invention concerne un dispositif d'affichage tête haute (10) pour un véhicule automobile (20), comportant un boîtier (14), un dispositif de projection (16) agencé dans le boîtier (14) et servant à projeter une image virtuelle sur une surface de projection (12) se trouvant à l'extérieur du boîtier (14), et un dispositif de renvoi (18) agencé dans le boîtier (14) et servant à renvoyer une lumière (34) émise par le dispositif de projection (16). Le dispositif de renvoi (18) comprend un élément optique holographique (22) monté rotatif dans le boîtier (14) et conçu de telle manière qu'il renvoie sur la surface de projection (12) la lumière (34) du dispositif de projection (16) à l'intérieur du boîtier (14). L'élément optique holographique (22) peut présenter des caractéristiques de réflexion par rapport à la lumière (34) fonction de sa position de rotation, et agir ainsi sur la lumière (34) à la manière d'une surface réfléchissante virtuelle (36', 36'', 36''') pour laquelle un déplacement linéaire virtuel (44) dans une direction de propagation de la lumière (34) peut être ajusté par la position de rotation de l'élément optique holographique (22).
PCT/EP2017/059961 2016-04-29 2017-04-26 Dispositif d'affichage tête haute pour véhicule automobile, muni d'un élément optique holographique WO2017186806A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016005200.7A DE102016005200A1 (de) 2016-04-29 2016-04-29 Head-up-Anzeigevorrichtung mit einem holographisch optischen Element für ein Kraftfahrzeug
DE102016005200.7 2016-04-29

Publications (1)

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WO2017186806A1 true WO2017186806A1 (fr) 2017-11-02

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PCT/EP2017/059961 WO2017186806A1 (fr) 2016-04-29 2017-04-26 Dispositif d'affichage tête haute pour véhicule automobile, muni d'un élément optique holographique

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DE (1) DE102016005200A1 (fr)
WO (1) WO2017186806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4369077A1 (fr) * 2022-11-09 2024-05-15 Envisics Ltd. Boîte à oeil étendue

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Publication number Priority date Publication date Assignee Title
DE102017222621A1 (de) * 2017-12-13 2019-06-13 Robert Bosch Gmbh Projektionsvorrichtung mit einer Bilderzeugungseinheit
JP7367525B2 (ja) * 2019-12-26 2023-10-24 株式会社リコー 表示装置、表示システムおよび移動体

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JPH05229366A (ja) * 1992-02-18 1993-09-07 Kansei Corp ヘッドアップディスプレイ装置
US20120086625A1 (en) * 2010-10-08 2012-04-12 Seiko Epson Corporation Virtual image display device
DE102011075884A1 (de) 2011-05-16 2012-11-22 Robert Bosch Gmbh HUD mit holographischen optischen Elementen
DE102012200867A1 (de) 2012-01-23 2013-07-25 Robert Bosch Gmbh Verfahren und Steuergerät zum Nachführen eines Projektionsstrahls eines Blickfeldanzeigegeräts
WO2015041203A1 (fr) * 2013-09-20 2015-03-26 日本精機株式会社 Dispositif d'affichage tête haute
DE102014200377A1 (de) 2014-01-13 2015-07-16 Robert Bosch Gmbh Blickfeldanzeige für ein Fahrzeug zum Darstellen von Bildinformationen in zwei unabhängigen Bildern für einen Betrachter

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JPH05104982A (ja) * 1991-10-16 1993-04-27 Asahi Glass Co Ltd 車両用ヘツドアツプデイスプレイ
DE102013208971A1 (de) * 2013-05-15 2014-11-20 Robert Bosch Gmbh Vorrichtung und Verfahren zum Projizieren einer Bildinformation in ein Blickfeld eines Fahrzeuginsassen eines Fahrzeugs
DE102015215097A1 (de) * 2015-08-07 2017-02-09 Robert Bosch Gmbh Projektionsvorrichtung für eine Bildgebereinheit eines Head-up-Displays, Bildgebereinheit, Verfahren zum Betreiben einer Projektionsvorrichtung und Verfahren zum Erzeugen eines Bildes in einem Head-up-Display

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229366A (ja) * 1992-02-18 1993-09-07 Kansei Corp ヘッドアップディスプレイ装置
US20120086625A1 (en) * 2010-10-08 2012-04-12 Seiko Epson Corporation Virtual image display device
DE102011075884A1 (de) 2011-05-16 2012-11-22 Robert Bosch Gmbh HUD mit holographischen optischen Elementen
DE102012200867A1 (de) 2012-01-23 2013-07-25 Robert Bosch Gmbh Verfahren und Steuergerät zum Nachführen eines Projektionsstrahls eines Blickfeldanzeigegeräts
WO2015041203A1 (fr) * 2013-09-20 2015-03-26 日本精機株式会社 Dispositif d'affichage tête haute
EP3048468A1 (fr) * 2013-09-20 2016-07-27 Nippon Seiki Co., Ltd. Dispositif d'affichage tête haute
DE102014200377A1 (de) 2014-01-13 2015-07-16 Robert Bosch Gmbh Blickfeldanzeige für ein Fahrzeug zum Darstellen von Bildinformationen in zwei unabhängigen Bildern für einen Betrachter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4369077A1 (fr) * 2022-11-09 2024-05-15 Envisics Ltd. Boîte à oeil étendue

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