WO2016136060A1 - Système optique de projection, et dispositif de projection d'image comportant ce système - Google Patents

Système optique de projection, et dispositif de projection d'image comportant ce système Download PDF

Info

Publication number
WO2016136060A1
WO2016136060A1 PCT/JP2015/083099 JP2015083099W WO2016136060A1 WO 2016136060 A1 WO2016136060 A1 WO 2016136060A1 JP 2015083099 W JP2015083099 W JP 2015083099W WO 2016136060 A1 WO2016136060 A1 WO 2016136060A1
Authority
WO
WIPO (PCT)
Prior art keywords
optical system
image
projection
light
magnifying
Prior art date
Application number
PCT/JP2015/083099
Other languages
English (en)
Japanese (ja)
Inventor
大西　道久
川井　清幸
佳拡 橋本
Original Assignee
アルプス電気株式会社
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 アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2016136060A1 publication Critical patent/WO2016136060A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
    • 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
    • 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
    • G02B27/48—Laser speckle optics
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2294—Addressing the hologram to an active spatial light modulator
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
    • G03H1/22—Processes or apparatus for obtaining an optical image from holograms
    • G03H1/2202—Reconstruction geometries or arrangements
    • G03H1/2205—Reconstruction geometries or arrangements using downstream optical component
    • G03H2001/221—Element having optical power, e.g. field lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/14—Diffuser, e.g. lens array, random phase mask
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
    • G03H2223/00—Optical components
    • G03H2223/19—Microoptic array, e.g. lens array

Definitions

  • the present invention relates to a projection optical system used for a head-up display device and the like and an image projection apparatus having the same.
  • Patent Document 1 discloses a DMD (Digital Mirror Device) that emits display light constituting a display image, a transmissive screen that emits display light received from the DMD as diffused light having a substantially uniform light intensity distribution, and a transmissive type.
  • a head-up display device including a magnifying mirror that reflects light emitted from a screen is disclosed. The display light emitted from the magnifying mirror is reflected by the windshield, so that the driver can visually recognize the virtual image of the display image.
  • a microlens array is used as a transmissive screen.
  • a phase modulation element that phase-modulates laser light emitted from a light source, an FT lens that Fourier-transforms the light modulated by the phase modulation element, and an intermediate image formed by light emitted from the FT lens are formed.
  • a head-up display device including a diffuser as a transmissive screen and two magnifying mirrors that magnify an intermediate image is described.
  • JP 2014-149405 A Japanese Patent Application No. 2013-226792
  • one or two magnifying mirrors are arranged on the image side of the transmissive screen, and the intermediate image formed on the transmissive screen by these has a predetermined magnification. It is supposed to be expanded with.
  • a desired projection optical magnification is realized by one or two magnifying mirrors as in the configurations described in Patent Documents 1 and 2. Therefore, it is necessary to increase the enlargement ratio in each mirror. For this reason, there is a problem in that the visibility of the displayed image is lowered because the optical aberration in the mirror tends to increase.
  • Patent Documents 1 and 2 a microlens array or a diffuser is used as the transmission screen.
  • the angle of observation of the observer can be increased because the divergence angle of the light is increased.
  • spatial regularity occurs, it is caused by the laser beam.
  • speckle noise may occur.
  • an object of the present invention is to provide a projection optical system and an image projection apparatus capable of enlarging an intermediate image at a predetermined magnification while suppressing optical aberration and speckle noise.
  • an image projection apparatus of the present invention includes a light source that emits laser light, an image forming optical system that forms a predetermined intermediate image based on the laser light emitted from the light source, and an intermediate image.
  • a projection optical system that guides the projection surface while enlarging the image to a predetermined magnification.
  • the projection optical system diverges incident light by diverging incident light and a first optical element that reduces speckle noise included in the intermediate image.
  • a second optical element that emits light having a divergent angle, a first magnification optical system that magnifies the intermediate image, and a second magnification optical system that further magnifies the image magnified by the first magnification optical system. It is characterized by that.
  • the optical magnification can be shared with each other, so that optical aberrations in each magnifying optical system can be suppressed, As a result, a high-definition display image can be projected larger and further away.
  • the spatial regularity can be reduced and the speckle noise can be reduced. Light with a desired divergence angle can be obtained efficiently.
  • the transmission screen is sometimes displaced to reduce the speckle noise.
  • the speckle noise can be reduced by the first optical element. Therefore, a driving device or a control device for displacement or the like is not necessary.
  • a first optical element, a first magnifying optical system, a second optical element, and a second magnifying optical system are arranged in order from the image forming optical system side.
  • the size of the first optical element can be kept small, so that the component unit price can be reduced. Further, when the first optical element is disposed between the first magnifying optical system and the second optical element, it is necessary to increase the size of the second optical element in order to allow the scattered light from the first optical element to enter. Yes, the scattering of light in the first optical element may affect the generation of a divergent light beam in the second optical element. However, when the first optical element is arranged on the object side with respect to the first magnifying optical system, Such an influence can be suppressed.
  • the first magnifying optical system is a lens having a positive refractive power
  • the first optical element is disposed at the front focal position of the lens and the second optical element is disposed at the rear focal position. It is preferable that they are arranged. With such an arrangement, a high-definition image can be formed on the second optical element.
  • the second magnifying optical system is a mirror that reflects incident light.
  • the first optical element has a plurality of convex portions protruding in a direction perpendicular to the plane on at least one plane of the plane parallel plate, and the projection amount distribution of the plurality of convex portions is A random retardation plate set irregularly is preferable.
  • the second optical element is preferably a microlens array in which a plurality of microlenses are regularly arranged.
  • the image forming optical system includes: a phase modulation element that performs phase modulation on light emitted from a light source to generate phase modulation light; and a Fourier transform optical system that performs Fourier transform on the phase modulation light. It is preferable to have.
  • a hologram image can be formed as an intermediate image on the first optical element.
  • the projection optical system of the present invention is a projection optical system that guides an intermediate image formed based on laser light to a projection surface while enlarging the intermediate image to a predetermined magnification, and reduces speckle noise contained in the intermediate image. Enlarged by a first optical element, a second optical element that diverges incident light and emits it as divergent light having a predetermined divergence angle, a first magnifying optical system that magnifies an intermediate image, and a first magnifying optical system And a second enlarging optical system for further enlarging the image.
  • a projection optical system and an image projection apparatus capable of projecting a high-definition image further by enlarging an intermediate image at a predetermined magnification while suppressing optical aberration and speckle noise.
  • FIG. 1 It is a top view which shows the structure of the image projector which concerns on embodiment of this invention. It is a block diagram which shows the structure of the image projector shown in FIG.
  • FIG. 1 is a plan view showing the configuration of the image projection apparatus 10 according to the present embodiment.
  • FIG. 2 is a block diagram showing a configuration of the image projection apparatus 10 shown in FIG.
  • the image projection apparatus 10 includes a laser light source 20, a laser driver 21, a collimator lens 22, an LCOS 30, an LCOS driver 31, an FT lens 32, a random phase difference plate 41, and the like. , A projection lens 42, a microlens array 43, a projection mirror 44, a control unit 70, and a memory 71.
  • the FT lens 32, the random phase difference plate 41, the projection lens 42, and the microlens array 43 are arranged in this order from the LCOS 30 side to the projection mirror 44 side. They overlap each other along the X-axis direction (FIG. 1).
  • the laser light source 20 is a light source that emits laser light having a wavelength in the visible region, and emits light having an intensity corresponding to the amount of current supplied from the laser driver 21.
  • the amount of current supplied from the laser driver 21 is controlled by the control unit 70.
  • the laser light I1 emitted from the laser light source 20 is converted into a parallel light beam I2 by the collimator lens 22 and enters the LCOS 30.
  • LCOS 30 is a reflective LCOS (Liquid Crystal On Silicon), and is a panel having a liquid crystal layer and an electrode layer such as aluminum.
  • the LCOS 30 includes a plurality of pixels in which electrodes for applying an electric field to the liquid crystal layer are regularly arranged.
  • the phase modulation element As the phase modulation element, the tilt angle in the thickness direction of the crystal layer in the liquid crystal layer changes due to the change in electric field strength applied to each electrode, and the reflected laser beam has a phase for each pixel. Modulated. Such a change in phase for each pixel is controlled by the LCOS driver 31.
  • An instruction signal corresponding to the image data is sent to the LCOS driver 31 from the control unit 70 that has read the image data stored in the memory 71 in advance, and according to this instruction signal, the LCOS driver 31 outputs the instruction signal for each pixel of the LCOS 30. By controlling the phase, a predetermined phase-modulated light I3 is generated.
  • the phase-modulated light I3 generated by the LCOS 30 enters an FT lens 32 as a Fourier transform optical system.
  • the FT lens 32 is, for example, a biconvex positive lens, and performs Fourier transform on incident light as a Fourier transform lens and generates image light I4 by collecting the incident light.
  • This image light I4 forms an image on the random phase difference plate 41 as an intermediate image (hologram image).
  • a positive refractive power lens having another shape or a positive refractive power optical system including a plurality of lenses is used instead of the FT lens 32. Also good. If phase modulation is possible, a transmissive LCOS or other modulation element may be used instead of the LCOS 30.
  • the collimator lens 22, the LCOS 30, and the FT lens 32 described above constitute an image forming optical system that forms a predetermined intermediate image based on the laser light emitted from the laser light source 20.
  • the random retardation plate 41 has a parallel flat plate shape, and is formed, for example, by resin molding.
  • the random retardation plate 41 has a plurality of convex portions (lenslets) formed on at least one of two planes (incident surface 41a and exit surface 41b) facing each other. These convex portions protrude in a direction (X direction) orthogonal to the plane, and are arranged so that the distribution of the protruding amount of the convex portions is irregular.
  • the protrusion amount of the convex portion for example, there are four types in which the phase shift is 0 (zero), ⁇ / 4, 2 ⁇ / 4, and 3 ⁇ / 4 with respect to the light with the wavelength ⁇ incident on the random retardation plate 41.
  • each light is generated at each convex portion.
  • the area occupied by each convex portion on the plane is approximately the same as or less than the pixels of the intermediate image formed on the random phase difference plate 41, and is, for example, 1/2 to 1/10 of the pixels. It is preferable.
  • the random retardation plate 41 can disturb the spatial regularity of the phase of the transmitted light as the first optical element. Therefore, the specifications included in the intermediate image generated by the FT lens 32 It is possible to emit image light I5 with reduced noise to the projection lens 42 side.
  • the random retardation plate 41 may have a configuration other than the above as long as a phase difference can be given to the transmitted light.
  • a configuration in which an isotropic transparent thin film is formed on a part of the plane or a birefringent plate can be used.
  • the projection lens 42 is, for example, a biconvex positive lens, and is made of glass, plastic, or other transparent material, and magnifies the intermediate image at a predetermined magnification as a first magnification optical system.
  • the image light I6 emitted from the projection lens 42 enters the microlens array 43.
  • the random retardation plate 41 is disposed at the front focal position of the projection lens 42 (the focal position on the LCOS 30 side), and the microlens array 43 is disposed at the rear focal position of the projection lens 42 (image side focal position). ing. Thereby, an enlarged image of the intermediate image formed on the random phase difference plate 41 is formed on the microlens array 43.
  • a positive refractive power lens having another shape or a positive refractive power optical system including a plurality of lenses may be used.
  • the microlens array 43 is formed by molding a resin, for example, and has a configuration in which a plurality of microlenses are regularly arranged on the incident surface 43a. In the microlens array 43, each microlens diverges the incident light I6 as a second optical element, whereby a divergent light beam I7 having a predetermined divergence angle is emitted.
  • the divergent light beam I7 emitted from the microlens array 43 is incident on the projection mirror 44.
  • the reflecting surface 44 a of the projection mirror 44 is a concave mirror (magnifying mirror), and the divergent light beam I 7 is magnified and reflected by the projection mirror 44. That is, the projection mirror 44 further magnifies the image magnified by the projection lens 42 as the second magnification optical system.
  • the reflected light from the projection mirror 44 is projected onto the display area of the windshield 45 of the vehicle. Since this display area functions as a semi-reflective surface, the incident image light is reflected toward the driver and a virtual image is formed in front of the windshield 45.
  • the second magnifying optical system may be composed of a plurality of projection mirrors in consideration of the size, configuration, aberration, and the like of the apparatus.
  • the random retardation plate 41, the projection lens 42, the microlens array 43, and the projection mirror 44 described above guide the intermediate image formed on the random retardation plate 41 to a projection surface while enlarging the intermediate image to a predetermined magnification.
  • a projection optical system is configured.
  • the optical magnification can be shared by these, so that the optical aberration that increases as the magnification increases, In particular, distortion, chromatic aberration, and luminance aberration can be suppressed. Accordingly, a high-definition display image can be projected larger and further away.
  • a random phase difference plate 41 and a microlens array 43 are provided, and the random phase difference plate 41 reduces speckle noise caused by the laser light, thereby reducing the microlens array.
  • divergent light having a predetermined divergence angle is generated.
  • the spatial regularity can be reduced by transmitting through the random phase difference plate 41 to reduce speckle noise, and the light having a desired divergence angle can be transmitted through the microlens array 43. Obtained efficiently.
  • the random retardation plate 41 and the microlens array 43 with high transmittance it is possible to suppress the loss of light intensity and the loss due to scattering of incident light as compared with the case of using a diffuser. High quality and high quality final images can be obtained.
  • the transmission screen is sometimes displaced to reduce speckle noise.
  • such operation and control are not necessary, so No drive device or control device is required.
  • the size of the random retardation plate 41 can be kept small compared to the case where it is arranged on the image side. Therefore, the unit price can be reduced. Further, when the random retardation plate 41 is disposed between the projection lens 42 and the microlens array 43, it is necessary to increase the size of the microlens array 43 in order to allow the scattered light from the random retardation plate 41 to enter. In addition, the scattering of light in the random phase difference plate 41 may affect the generation of divergent light beams in the microlens array 43. If the random phase difference plate 41 is arranged on the object side with respect to the projection lens 42, this may occur. Such an effect can be suppressed.
  • the collimator lens 22, the LCOS 30, and the FT lens 32 constitute an image forming optical system for forming an intermediate image.
  • the light from the laser light source 20 is scanned.
  • a configuration is also possible in which a scanning unit is provided, and an intermediate image is formed on the random retardation plate 41 by scanning light from the scanning unit.
  • the projection optical system and the image projection apparatus having the projection optical system according to the present invention are useful for a head-up display device for a vehicle and are suitable for displaying a high-definition and large-size image.

Landscapes

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

Abstract

Le problème décrit par la présente invention est de pourvoir à un système optique de projection et à un dispositif de projection d'image qui permettent d'agrandir une image intermédiaire selon un agrandissement imposé et de supprimer des aberrations optiques et un bruit de granulation. La solution selon l'invention porte sur une source lumineuse qui émet une lumière laser, sur un système optique de formation d'image qui forme une image intermédiaire imposée sur la base de la lumière laser émise par la source lumineuse, et sur un système optique de projection qui agrandit l'image intermédiaire jusqu'à atteindre un agrandissement imposé et qui guide ladite image vers une surface pour la projection. Ledit système optique de projection comporte un premier élément optique qui réduit le bruit de granulation inclus dans l'image intermédiaire, un second élément optique qui fait diverger la lumière incidente et qui émet ladite lumière sous la forme d'une lumière divergente ayant un angle de divergence imposé, un premier système optique d'agrandissement qui agrandit l'image intermédiaire, et un second système optique d'agrandissement qui agrandit encore plus l'image agrandie par le premier système optique d'agrandissement.
PCT/JP2015/083099 2015-02-23 2015-11-25 Système optique de projection, et dispositif de projection d'image comportant ce système WO2016136060A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015032847 2015-02-23
JP2015-032847 2015-02-23

Publications (1)

Publication Number Publication Date
WO2016136060A1 true WO2016136060A1 (fr) 2016-09-01

Family

ID=56788661

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2015/083099 WO2016136060A1 (fr) 2015-02-23 2015-11-25 Système optique de projection, et dispositif de projection d'image comportant ce système

Country Status (1)

Country Link
WO (1) WO2016136060A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020042154A (ja) * 2018-09-10 2020-03-19 コニカミノルタ株式会社 ヘッドアップディスプレイ装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030039036A1 (en) * 2001-08-27 2003-02-27 Eastman Kodak Company Laser projection display system
JP2009229752A (ja) * 2008-03-21 2009-10-08 Toshiba Corp 表示装置、表示方法及びヘッドアップディスプレイ
JP2011508911A (ja) * 2008-01-07 2011-03-17 ライト、ブルー、オプティクス、リミテッド ホログラフィック画像表示システム
US20120008181A1 (en) * 2009-03-27 2012-01-12 Cable Adrian J Holographic Image Display Systems
JP2012039397A (ja) * 2010-08-06 2012-02-23 Toshiba Corp 表示装置
JP2014149405A (ja) * 2013-01-31 2014-08-21 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030039036A1 (en) * 2001-08-27 2003-02-27 Eastman Kodak Company Laser projection display system
JP2011508911A (ja) * 2008-01-07 2011-03-17 ライト、ブルー、オプティクス、リミテッド ホログラフィック画像表示システム
JP2009229752A (ja) * 2008-03-21 2009-10-08 Toshiba Corp 表示装置、表示方法及びヘッドアップディスプレイ
US20120008181A1 (en) * 2009-03-27 2012-01-12 Cable Adrian J Holographic Image Display Systems
JP2012039397A (ja) * 2010-08-06 2012-02-23 Toshiba Corp 表示装置
JP2014149405A (ja) * 2013-01-31 2014-08-21 Nippon Seiki Co Ltd ヘッドアップディスプレイ装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020042154A (ja) * 2018-09-10 2020-03-19 コニカミノルタ株式会社 ヘッドアップディスプレイ装置

Similar Documents

Publication Publication Date Title
JP6696236B2 (ja) 表示装置および導光装置
WO2015012138A1 (fr) Dispositif de projection de type à balayage
WO2015190157A1 (fr) Dispositif d'affichage d'image virtuelle
JP6589890B2 (ja) ヘッドアップディスプレイ装置
US20170115553A1 (en) Scanning projector transmissive screen, and scanning projector system
KR20130012109A (ko) 헤드업 디스플레이 장치
JP2011085790A (ja) 電気光学装置及び電子機器
JP6738543B2 (ja) 表示装置及びヘッドアップディスプレイ
US11586041B2 (en) Virtual image display device
US11561396B2 (en) Head-up display device and transportation device
WO2018225309A1 (fr) Dispositif d'affichage d'image virtuelle, unité de formation d'image intermédiaire et unité de génération de lumière d'affichage d'image
JP2019191313A (ja) ヘッドアップディスプレイ装置
JP2019028137A (ja) 車両用表示装置
JP6579180B2 (ja) 虚像表示装置
US10488657B2 (en) Head-up display device with uniform brightness
JP2016176996A (ja) 画像投影装置
CN114428406A (zh) 一种抬头显示系统和基于抬头显示系统的图像显示方法
JP6427085B2 (ja) 画像表示装置
JP7112644B2 (ja) ヘッドアップディスプレイ装置
JP2024519708A (ja) 拡大回折反射が可能な多重視野角モニタシステム
US10578867B2 (en) Head-up display with holographic optical element
WO2016136060A1 (fr) Système optique de projection, et dispositif de projection d'image comportant ce système
JP6820502B2 (ja) 画像表示装置
WO2017208911A1 (fr) Dispositif d'affichage d'image
JP2017227681A (ja) ヘッドアップディスプレイ装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15883350

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: JP

122 Ep: pct application non-entry in european phase

Ref document number: 15883350

Country of ref document: EP

Kind code of ref document: A1