CN108227193A - The projection device of motor vehicle and the method that virtual image is shown for driver - Google Patents
The projection device of motor vehicle and the method that virtual image is shown for driver Download PDFInfo
- Publication number
- CN108227193A CN108227193A CN201711392519.9A CN201711392519A CN108227193A CN 108227193 A CN108227193 A CN 108227193A CN 201711392519 A CN201711392519 A CN 201711392519A CN 108227193 A CN108227193 A CN 108227193A
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- China
- Prior art keywords
- projection device
- hologram
- light
- cover plate
- image
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical 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
-
- 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
-
- 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
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
- G02B27/4233—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect having a diffractive element [DOE] contributing to a non-imaging application
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Instrument Panels (AREA)
- Holo Graphy (AREA)
- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The method that virtual image is shown the present invention relates to the projection device of motor vehicle and for driver.The present invention relates to a kind of projection devices for motor vehicle（1）, the projection device is with image generation unit（2）, in the projection device（1）Inner space（17）Middle generation image is shown；With imaging optical device（14、15）, for making the light that described image is shown towards the closing projection device（1）Inner space（17）Cover plate（20）Direction orientation, which is characterized in that in the cover plate（20）Upper setting hologram, for make light redirect in a motor vehicle in the projection device（1）Except reflecting surface（10）On.
Description
Technical field
The method that projection device the present invention relates to motor vehicle and the driver for motor vehicle show virtual image.
Background technology
From a kind of head up display known in 8934159 B2 of US（Head-Up-Display）, gear is arranged in wherein projecting to
Three-dimensional hologram on wind glass（Volumenhologramm）On.Three-dimensional hologram makes the light through projection towards the driver of vehicle
Directional steering so that for observer, virtual location of the image through projection as being suspended in vehicle front.
From a kind of display device for projected virtual image for vehicle known in 2008/0192358 A1 of US.Projection
Equipment is arranged in the instrument board of vehicle.The inner space of projection device is closed by cover plate, and wherein cover plate is implemented as wedge
Shape.On the one hand, it is realized by the embodiment of wedge shape：Light can be projected on the windshield of vehicle so that virtual image
It is visible for driver.On the other hand, the sunlight that chock is arranged such that be mapped on wedge-shaped cover plate from outside is collected towards light
The directional steering of device, the light collector are disposed adjacent to wedge-shaped cover plate.
Invention content
Advantages of the present invention
Correspondingly, the projection device of the feature according to the invention with independent claims has the following advantages that：It can be with
It realizes and the structure space of the projection device in vehicle is reduced.Whereby or, it is possible that for previously given virtual graph
Image distance from（Object should be suspended with the virtual image distance in vehicle front）, for the visual field of the bigger of driver
（Eyebox）Or the smaller of projection device is realized for the visual field of bigger or for the ken of the bigger of head up display
Volume or the ken or bigger of the virtual image of bigger distance or bigger are realized using the identical volume of projection device
The visual field of visual field or bigger.It is realized in this cover plate by integrating the hologram into projection device.Pass through the suction of cover glass
Receipts face and especially shape prevents：The light of the sun can reach visual field via cover glass and windshield and therefore arrive
Up to driver's eyes.In addition, it is prevented in the case of hologram cover plate according to the invention：Sunlight makes hologram according to its light
Learn function come rebuild and via windshield reach driver's eyes, the sunlight cover glass-hologram-element-
The lower lateral reflection of heap-air-transition part.
In addition, using the present invention it is possible that spatially replacing corresponding interchangeable steering by hologram saving
Element, such as minute surface.In addition, because hologram is disposed on cover plate, additional component or additional carrier are not needed to.
Other than saving the structural volume of optical element, additionally it is possible to similary to save for light guiding required structure space in itself.Cause
It may be rocked for light path due to steering.In addition, because the turning function of hologram substantially can be freely chosen,
It is also possible that ensure by other optical elements（Such as other minute surfaces）Or projection device is arranged in the inside of projection device
The changeability of bigger when in space.Therefore, it may be necessary to which provided volume is preferably provided.
For the application in motor vehicle, reduce the volume especially at that following reflecting surface and be important, institute
The previously given light whichaway of reflecting surface is stated to project from projection device.Because it is disposed with this reflector in other cases
Position on, be usually disposed with element, such as steering column or the steering column suspension arrangement in limiting structure space in the car.These yuan
The position of part is mostly previously given and less variable.However, by using hologram on the cover plate of projection device, aobvious
Necessary changeability in the case of showing optical element and can be realized in the case of required volume whereby.
The further advantage of the present invention is obtained from the feature illustrated in the dependent claims.So advantageously, make lid
Piece is constructed and by hologram construction by the first plastic material in plastic foil, and the plastic foil is applied to the first plastics material
On material.In one preferred embodiment, the first plastic material is makrolon, the makrolon due to its stability and
It can work as carrier.In this case, makrolon can be presented by die casting and be wished in a simple manner
The shape of prestige is presented.Then, the second plastic material can especially be applied to the first plastics material to work as carrier
On material.Advantageously, the second plastic material is configured to photopolymer film, and hologram can be constructed into institute easily by exposure
It states in photopolymer film.
In another embodiment, hologram is configured such that from the outside of the inner space of opposite projection device and is mapped to
Light on hologram leaves from the inner space of projection device.Through this, it is possible to reduce interference light, especially sunlight or street lamp
Light, it is described interference light reach projection device inner space and the image to being carried out in the inner space of projection device give birth to
Into being interfered.In another embodiment, it advantageously provides in this case：The light being mapped on cover plate from outside passes through complete
The construction of breath figure is directed into the light absorption face adjacent to projection device, in such as black side.The light is avoided towards sight through this
The directional steering for the person of examining and it may interfere with the observer.
In another embodiment, cover plate is implemented deviously.Through this, advantageously achieve and be mapped on cover plate from outside
Light leaves from observer.Therefore, incident sunlight is not reflected in visual field via windshield and is reflected whereby
Into driver's eyes.Advantageously, in this case, hologram is arranged in the side of the inner space towards projection device.
In this embodiment, it can be realized by the embodiment of the bending of cover plate：Avoid the structure in three-dimensional hologram（It is described
Structure is similar to Bragg grating（Bragg-Gitter）It works on ground）On do not meet desired scattering, mode is from outer
Portion is mapped to the light on projection device（Such as sunlight）The hologram being arranged on the inside of cover plate cannot be arrived first at completely.
Advantageously, hologram will be implemented as transmission three-dimensional hologram with simply realizing.
In addition, in order to which interference shadow is further avoided to ring, slow film and/or light polarizing film can be arranged on cover plate.
Especially when be determined for being forwarded to the light on reflecting surface with normal into 30 ° to 50 °, especially into 35 ° extremely
When being mapped on hologram to 45 ° of angle, realize particularly suitable for being used in the car through steering caused by hologram.
The incidence angle and the angle of diffraction of hologram are defined when shooting hologram.These angles should be according to display and in the car
The requirement of installation site selects.Then, under these angles, when reappearing, the diffraction effect of hologram is especially high.It is diverted to
Other angle configurations are possible.
For for showing that the method for virtual image obtains corresponding advantage.
Description of the drawings
The embodiment of the present invention is shown in the drawings and is further illustrated in the description that follows.
Wherein：
Fig. 1 shows the first embodiment of the embodiment according to the invention for projection device；
The embodiment of the embodiment for cover plate is illustrated in detail in Fig. 2；
Fig. 3 is shown with illustrative incidence angle related with the angle of the light of injection in the case of the wavelength limited
Hologram diffraction effect diagram；
Fig. 4 shows the second embodiment for projection device.
Specific embodiment
Projection device 1 is shown in FIG. 1, the projection device is especially arranged in the instrument board of motor vehicle.It is throwing
Image generation unit 2 is disposed in shadow equipment 1, true image is especially presented in described image generation unit in the matrix form.
Image generation unit 2 is implemented as liquid crystal display.Advantageously, the light narrowband of image-display units is broadly implemented, example
Such as in the case of RGB, each color（+/-0.5-1nm）FWHM.In this way, image source either tail lamp unit can have LED or
It is realized based on laser.
The picture signal shown in image generation unit 2 sends image generation unit 2 to by manipulation unit 3.The manipulation
Unit is connect by data connection 4 with the computing unit 5 being especially arranged on except projection device.Computing unit 5 is further through vehicle
Data/address bus 6 employs detection vehicle-state and the sensor unit 7,8 of the information from vehicle-periphery, such as speed passes
Sensor, acceleration transducer or the range sensor with the vehicle of traveling ahead.Therefore, especially to the crucial traveling of vehicle
Situation but also the instruction of the status information including vehicle can be presented by means of image generation unit 2.However, for
For observer in the inner space of vehicle, the image of image generation unit 2 shows not to be directly to connect with direct optics
It is grounded visible.More precisely, it is diverted into from the light 9 of image generation unit 2s by optical inversion anti-in vehicle
It penetrates on face 10.The reflecting surface for example can be windshield, installation reflector on the windshield or following reflecting surface, institute
Reflecting surface is stated well visibly to be arranged in before the windshield of vehicle in space inside the vehicle.From reflecting surface 10, light court drives
The directional steering of the person of sailing 11.When observing reflecting surface 10, by the image 13 shown in image generation unit 2 as being suspended in vehicle
12 front of windshield.Thus, image 13 is referred to as virtual image 13.
Here, being diverted for more than 9 times from the light of image generation unit 2s, wherein light path is folded.Reality shown here
It applies in scheme, light is mapped to first on the first minute surface 14 and the second minute surface 15.Minute surface 14,15 can be with level land, spherical earth, aspherical
Or free posing implement.From the second minute surface 15, light is diverted on the cover plate 20 of projection device 1.Cover plate 20 is projection
The part of the shell 16 of equipment 1, wherein shell 16 surround out inner space 17, and figure is especially disposed in the inner space
As generation unit 2.
Here, cover plate 20 has hologram, wherein being mapped to light 9 on cover plate 20 from image generation unit from the second minute surface 15
2 set out is diverted by the imaging function of hologram depending on position so that light is towards the directional steering of reflecting surface 10.Here,
20 one side of cover plate meets function of the closing as the inner space 17 of the part of the shell 16 of projection device, on the other hand
The function of light diverter is met, i.e., in the light diverter, is turned in a desired manner by the light of the second mirror-reflection
To so that by being reflected on reflecting surface 10, driver can perceive the light as virtual image.
The embodiment of cover plate 20 is illustrated in detail in fig. 2.In this case, cover plate 20 is implemented deviously,
Mean camber is projectedly engaged in the inner space 17 of projection device 1.Side towards inner space is provided with cover plate substrate
21, the cover plate substrate is for example made of makrolon.In substrate 21 away from the side of inner space, 22 quilt of photopolymerization nitride layer
It is coated on substrate 21.Transmission three-dimensional hologram is exposed in photopolymerization nitride layer 22.
In another embodiment, video generation device is implemented as laser projection device, wherein true image by into
On picture to image generating surface.In this case, the use of laser projection is had the following advantages that：Laser light source is narrow bandwidth
's.It ensure that through this：When carrying out light steering by hologram, obscuring in image is shown is avoided, it is described to obscure perhaps
It may be obtained due to the wavelength dependence of the light turning function of hologram.
In order to protect photopolymerization nitride layer 22, protection can be arranged away from the side of inner space 17 in photopolymerization nitride layer 22
Layer 23, such as so-called hardening coat（Hard-Coating-Schicht）.
Photopolymerization nitride layer with 6 μm to 200 μm of thickness be applied to it is especially related with material be more than 60 μ
In the light transparent substrates of the thickness of m, the smooth transparent substrates for example by glass, makrolon, nylon either TAC form or
The photopolymerization nitride layer is between two light transparent carriers.It additionally, can be saturating by light in order to protect with scratch-proof function and abrasion
Bright hardening coat is coated on the complex obtained in this way.
Thus, for example it obtains such as lower structure.Sequentially it is：Makrolon cover glass-holographic element-polycarbonate substrate and
Optionally hardening coat.
In addition, by integrating the hologram into cover plate it is possible that performing and reflecting by the selection to hologram
The adaptation of the different layouts in face.Here, especially when windshield is used as reflecting surface it is possible that in a simple manner
The adaptation from different type of vehicle is carried out for projection device, wherein windshield is typically relative to the layout of projection device
Different.Therefore, it can be used in different type of vehicle with different cover plates and whereby with different holograms
The projection device being carried out identical in other cases.Then, no longer need herein projection device in itself within light
Learn the adaptation of element.
In figure 3, it relative to the incidence angle of the normal of the opposite hologram 41 in X-axis, is depicted in Y-axis 40 visible
The diffraction effect of the wavelength of light.It is here, quite high during this example illustrate the maximum value at 40 ° and at 35 ° to 50 °
Value.But, diffraction effect at that wavelength is more much smaller than the diffraction effect of other angles.It is achieved that：On the one hand with institute
The light that desired angle and the wavelength limited are mapped on cover plate is efficiently diverted.On the other hand, it is injected with another angle
Light, i.e. interference light are not to turn in a corresponding manner, but are lost.Especially, it is reflected on cover glass so that
Interference light cannot reach the inner space 17 of projection device 1 and cannot interfere imaging whereby.If still thering is light to penetrate to arrive at,
So due to the spectral correlations of diffraction effect, the light is by fanning scattering and thus equally can only limitedly be interfered.
Because since cover glass makes the sunlight of injection by spectrum fanning scattering, it is achieved that being not all of the spectrum injected all
Reach the device of generation image.
In another embodiment, it is also possible to, by diffraction functional configuration for so that being mapped on hologram from outside
Light is turned to towards preferred orientations.For this purpose, following example is shown in FIG. 4, in the example, the interference light of injection, especially
Sunlight passes through windshield 12 and is mapped on the cover plate 20 of projection device 30 with not substantially changing.Particularly by lid
The embodiment of the bending of piece 20, diffraction effect and also include setting by the prismatic of cover plate 20 in another embodiment
Meter scheme, " the strong light trapping being made of cover plate and the absorber 32 being disposed adjacent to formed in this way（Glare-Trap）”
It prevents：Hologram may interfere with ground or even cause by being rebuild in the sunlight lower lateral reflection, injecting of heap
Eyes are reached blindly.
Further it is also possible in the case of the similar layout of reflecting surface, projection device in the car another is selected
One position.
In another embodiment, the cover plate with hologram can be combined with light polarizing film and/or slow film during fabrication.
In this way, for instance it can be possible that the film composite of holographic film and light polarizing film is coated on glass carrier or plastic carrier.It can through this
Can, further prevent the sunlight injected.
Claims (9)
1. a kind of projection device for motor vehicle（1）, the projection device is with image generation unit（2）, for described
Projection device（1）Inner space（17）Middle generation image is shown；With imaging optical device（14、15）, for making the figure
Light as shown in is towards closing the projection device（1）Inner space（17）Cover plate（20）Direction orientation, which is characterized in that
In the cover plate（20）Upper setting hologram, for make light redirect in a motor vehicle in the projection device（1）Except
Reflecting surface（10）On.
2. projection device according to claim 1, which is characterized in that the cover plate（20）With by the first plastic material,
The substrate that especially makrolon is formed（21）, and the hologram construction be made of the second plastic material, especially by
The plastic foil that photopolymer is formed（22）In.
3. the projection device according to one of the claims, which is characterized in that the hologram is configured such that：Edge
Previously given direction is from the projection device（1）The light that is mapped on the hologram of outside be diverted so that the light from
The projection device（1）Inner space（17）In leave.
4. projection device according to claim 3, it is characterised in that light absorption face（32）, for absorbing along previously given
Direction is from the projection device（1）Outside be mapped to light on the hologram, being diverted.
5. the projection device according to one of the claims, which is characterized in that the cover plate（20）Bending.
6. the projection device according to one of the claims, which is characterized in that the hologram is implemented as transmission three
Tie up hologram.
7. the projection device according to one of the claims, which is characterized in that on the hologram and/or described
Cover plate（20）On be disposed with slow film and/or light polarizing film.
8. the projection device according to one of the claims, which is characterized in that selection imaging optical device and cover plate
Structure so that for the light that is forwarded on reflecting surface with normal into 30 ° -50 °, especially penetrated into 35 ° to 45 ° of angle
Onto the hologram.
9. a kind of method for being used to show virtual image for the driver of motor vehicle, wherein in projection device（1）Inside it is empty
Between（17）Middle generation image, and described image is by imaging optical device（14、15）Towards the projection device（1）Cover plate（20）
Directional steering, wherein light is from being arranged in the cover plate（20）On hologram along the directional steering to vehicle of the hologram
In the projection device（1）Inner space except reflecting surface（10）On.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016225994.6A DE102016225994A1 (en) | 2016-12-22 | 2016-12-22 | Projection device for a motor vehicle and method for displaying a virtual image for a driver of a motor vehicle |
| DE102016225994.6 | 2016-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108227193A true CN108227193A (en) | 2018-06-29 |
Family
ID=62510254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711392519.9A Pending CN108227193A (en) | 2016-12-22 | 2017-12-21 | The projection device of motor vehicle and the method that virtual image is shown for driver |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108227193A (en) |
| DE (1) | DE102016225994A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020013118A (en) * | 2018-07-19 | 2020-01-23 | エンヴィニクス リミテッド | Head-up display |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3117222A1 (en) * | 2020-10-26 | 2022-06-10 | Valeo Comfort And Driving Assistance | head-up display with holographic blade |
| DE102021208753A1 (en) | 2021-08-11 | 2023-02-16 | Robert Bosch Gesellschaft mit beschränkter Haftung | Display device in a vehicle |
| DE102021130835A1 (en) * | 2021-11-24 | 2023-05-25 | Bayerische Motoren Werke Aktiengesellschaft | Projection display system for a vehicle |
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|---|---|---|---|---|
| US4978214A (en) * | 1986-11-12 | 1990-12-18 | Hiroshi Kawata | Display apparatus for automotive vehicle |
| JPH03200427A (en) * | 1989-12-27 | 1991-09-02 | Nippon Seiki Co Ltd | Indication device for vehicle |
| JPH08238956A (en) * | 1995-03-06 | 1996-09-17 | Nippondenso Co Ltd | Head-up display device |
| CN104736349A (en) * | 2012-08-23 | 2015-06-24 | 拜耳材料科技股份有限公司 | Polycarbonate-based security documents and/or documents of value with a hologram in the card body |
| DE202014003241U1 (en) * | 2014-04-15 | 2015-07-20 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Holographic display device, vehicle with holographic display device and computer program product |
| DE102014015378A1 (en) * | 2014-10-17 | 2016-04-21 | Audi Ag | Housing for a head-up display of a motor vehicle and method for providing a housing for a head-up display |
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|---|---|---|---|---|
| JP2008195194A (en) | 2007-02-13 | 2008-08-28 | Yazaki Corp | Vehicular display device |
| CN102472894B (en) | 2010-04-20 | 2015-01-28 | 松下电器产业株式会社 | See-through display and head-up display |
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2016
- 2016-12-22 DE DE102016225994.6A patent/DE102016225994A1/en active Pending
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- 2017-12-21 CN CN201711392519.9A patent/CN108227193A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4978214A (en) * | 1986-11-12 | 1990-12-18 | Hiroshi Kawata | Display apparatus for automotive vehicle |
| JPH03200427A (en) * | 1989-12-27 | 1991-09-02 | Nippon Seiki Co Ltd | Indication device for vehicle |
| JPH08238956A (en) * | 1995-03-06 | 1996-09-17 | Nippondenso Co Ltd | Head-up display device |
| CN104736349A (en) * | 2012-08-23 | 2015-06-24 | 拜耳材料科技股份有限公司 | Polycarbonate-based security documents and/or documents of value with a hologram in the card body |
| DE202014003241U1 (en) * | 2014-04-15 | 2015-07-20 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Holographic display device, vehicle with holographic display device and computer program product |
| DE102014015378A1 (en) * | 2014-10-17 | 2016-04-21 | Audi Ag | Housing for a head-up display of a motor vehicle and method for providing a housing for a head-up display |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020013118A (en) * | 2018-07-19 | 2020-01-23 | エンヴィニクス リミテッド | Head-up display |
| JP6994769B2 (en) | 2018-07-19 | 2022-01-14 | エンヴィシクス リミテッド | Head-up display |
| US11397324B2 (en) | 2018-07-19 | 2022-07-26 | Envisics Ltd | Head-up display |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102016225994A1 (en) | 2018-06-28 |
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Application publication date: 20180629 |