EP3488273A1 - Dispositif de génération d'image et afficheur tête haute - Google Patents
Dispositif de génération d'image et afficheur tête hauteInfo
- Publication number
- EP3488273A1 EP3488273A1 EP17745695.1A EP17745695A EP3488273A1 EP 3488273 A1 EP3488273 A1 EP 3488273A1 EP 17745695 A EP17745695 A EP 17745695A EP 3488273 A1 EP3488273 A1 EP 3488273A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polarizer
- light
- liquid crystal
- additional
- screen
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 40
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 4
- 230000010287 polarization Effects 0.000 claims description 26
- 238000010521 absorption reaction Methods 0.000 claims description 13
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000016571 aggressive behavior Effects 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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
- G02B27/0101—Head-up displays characterised by optical features
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
-
- 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
- G03B21/20—Lamp housings
- G03B21/2073—Polarisers in the lamp house
-
- 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
- G02B2027/0118—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility
- G02B2027/012—Head-up displays characterised by optical features comprising devices for improving the contrast of the display / brillance control visibility comprising devices for attenuating parasitic image effects
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0278—Diffusing elements; Afocal elements characterized by the use used in transmission
Definitions
- the present invention relates to display systems, in particular for vehicles.
- It relates more particularly to an image generation device and a head-up display.
- the invention is particularly advantageous in the case where it is desired to obtain a particularly bright image without, however, causing an exaggerated heating within the device.
- an image-generating device comprising a liquid-crystal screen and a light source optically associated with the liquid-crystal screen for illuminating said screen is used.
- Such a liquid crystal screen generally comprises a matrix of liquid crystals interposed between an input polarizer and an output polarizer.
- an input polarizer is used, a first absorption polarizer adapted to selectively transmit a component of the light having a given input bias and, as the output polarizer, a second absorption polarizer adapted to selectively transmit a component of the light having a given output bias (generally orthogonal to the input bias).
- the present invention provides an image generating device comprising a liquid crystal screen and a light source optically associated with the liquid crystal screen for illuminating said screen, the liquid crystal display comprising a liquid crystal matrix interposed between an input polarizer and an output polarizer, the input polarizer being a first absorption polarizer adapted to selectively transmit a component of the light having a polarization of given input, the output polarizer being a second absorption polarizer adapted to selectively transmit a component of the light having a given output bias, said image generating device having a first additional polarizer located in the path of light, upstream of said liquid crystal screen and a second additional polarizer located in the light path, downstream of said liquid crystal screen, the first additional polarizer being a first reflection polarizer adapted to reflect a component of light having an orthogonal polarization to said polarization input and the second additional polarizer being a second reflection polarizer adapted to reflect a component of the light having a polarization orthogonal
- the image generation device comprises an intermediate optical part, such as a diffuser, interposed between the light source and the liquid crystal screen;
- the first additional polarizer is disposed between the liquid crystal screen and the intermediate optical part (for example between the liquid crystal screen and the aforementioned diffuser);
- the image generation device comprises a reflector extending between the light source and the intermediate optical part
- the first additional polarizer is disposed on the intermediate optical part (the first additional polarizer may for example be deposited, possibly by a rolling method, on the intermediate optical part);
- the first additional polarizer is disposed on the crystal screen liquids
- the first additional polarizer is deposited on the input polarizer (for example by means of a rolling method).
- the invention also proposes a head-up display comprising an image generation device as presented above and an image projection device adapted to transmit in the direction of a partially transparent plate the images generated by the generating device. image.
- the projection device comprises a mirror. We can then provide a support to carry the LCD screen and the mirror.
- the second additional polarizer can in practice be mounted in the support, for example at a window formed in the support for the passage of the light transmitted by the liquid crystal screen.
- Such a support may have a passage opening of the light reflected by the mirror in the direction of partially transparent blade.
- the second additional polarizer can then be located at said opening.
- the second additional polarizer can then close this opening or be deposited on a transparent wall closing this opening.
- FIG. 1 shows the main elements of a head-up display
- FIG. 2 represents elements of an image generation device used in the head-up display of FIG. 1;
- FIG. 3 represents an alternative embodiment
- FIG. 4 represents an alternative embodiment that can be envisaged for the elements of FIG. 2.
- FIG 1 there is schematically shown the main elements of a head-up display 1 for equipping a vehicle, for example a motor vehicle.
- Such a display 1 is adapted to create a virtual image I in the field of vision of a driver of the vehicle, so that the driver can see this virtual image I and any information it contains without having to look away.
- the display 1 comprises a partially transparent blade 2 placed in the field of view of the driver, an image generation device 3 adapted to generate images and an image projection device 4 adapted to return, in direction of said partially transparent plate 2, the images generated by the image generation device 3.
- the partially transparent blade 2 is here a combiner 2, that is to say a partially transparent blade dedicated to the head-up display 1.
- Such a combiner 2 is here placed between the windshield 9 of the vehicle and the eyes of the driver.
- the partially transparent blade could be confused with the windshield of the vehicle.
- it is the windshield of the vehicle which has the function of semi-transparent blade for the head-up display.
- the image projection device comprises a folding mirror 4 arranged to reflect the images generated by the image generating device 3 in the direction of the partially transparent plate 2.
- said folding mirror is a plane mirror.
- the image projection device could comprise a plurality of mirrors and / or other optical elements such as a lens, for example.
- the image generation device 3 comprises, for its part, at least one light source 5, a reflector 6, a diffuser 7 which receives the light emitted by the light source 5 (possibly after reflection on the reflector 5) and a screen 8 which receives the light transmitted by the diffuser 7.
- the light source 5 comprises at least one light emitting diode (or LED for "Light Emitting Diode”), and in general a plurality of such light emitting diodes.
- the reflector 6 extends between the light source 5 and the diffuser 7, at least partially surrounding the main emission axis of the light source 5.
- the diffuser 7 performs an angular spreading of the luminous flux generated by the light source assembly 5 - reflector 6.
- a diffuser 7 can be made for example by means of a film having a smooth face (for example turned towards the screen 8) and an opposite face grained (turned here to the light source 5) which produces light scattering.
- Screen 8 is a liquid crystal display (or LCD for "Liquid Crystal
- Displa / ' here with thin film transistors (or TFT for "Thin-FHm Transistoi”).
- such a screen 8 comprises an input polarizer 10, a liquid crystal matrix 12 and an output polarizer 14 (the liquid crystal matrix 12 being interposed between the input polarizer 10 and the polarizer output 14).
- the input polarizer 10 is an absorption polarizer adapted to selectively transmit a component of the light having a given input bias (eg a P-type polarization); the output polarizer 14 is in turn an absorption polarizer adapted to selectively transmit a component of the light having a given output polarization (for example an S-type polarization), generally orthogonal (i.e. perpendicular) to the input polarization.
- a given input bias eg a P-type polarization
- the output polarizer 14 is in turn an absorption polarizer adapted to selectively transmit a component of the light having a given output polarization (for example an S-type polarization), generally orthogonal (i.e. perpendicular) to the input polarization.
- the light beam between the input polarizer 10 and the output polarizer 14 will have the aforementioned input bias and no light will be emitted at the output of the output polarizer 14.
- the polarization of corresponding parts of the light beam is modified so that light is emitted at the output of the output polarizer 14 at the regions corresponding to these portions of the beam luminous.
- the image generation device 3 also comprises a first additional polarizer 16 located in the path of the light, upstream of said liquid crystal screen 8.
- the first additional polarizer 16 is a reflection polarizer adapted to reflect a component of light having a polarization orthogonal to the aforementioned input bias.
- the first additional polarizer 16 is carried by the diffuser 7, here on the face of the diffuser 7 facing the screen 8.
- the first additional polarizer 1 6 is for example laminated 7.
- the first additional polarizer 16 could be placed on the diffuser 7
- the diffuser assembly 7 - first additional polarizer 1 6 is located at (low) distance from the screen 8 (for the sake of clarity of the representation). This diffuser assembly 7 - first additional polarizer 16 may however in practice be placed in contact with the screen 8 (the first additional polarizer 1 6 being in contact with the screen 8).
- the first additional polarizer 1 6 thus makes it possible to reflect towards the diffuser 7 and then the reflector 6 the components of the light having a polarization orthogonal to the input polarization, which makes it possible to prevent these components from being absorbed within the polarizer. input 10 and then cause a heating of the screen 8.
- the first additional polarizer 16 transmits the component of the light having the aforementioned input polarization, which component is useful for illuminating the screen 8.
- the components reflected by the first additional polarizer 16 towards the reflector 6 also undergo (at least partially) a change in their polarization during the passage of the diffuser 7 so that they can finally be transmitted through the first additional polarizer 1 6 and then participate in the lighting of the screen 8.
- the image generating device 3 further comprises a second additional polarizer 18 located in the path of the light, downstream of said liquid crystal screen 8.
- the second additional polarizer 18 is here disposed between the screen 8 and the folding mirror 4.
- the second additional polarizer referenced 18 'in FIG. 3
- the second additional polarizer could be located between the folding mirror 4 and partially transparent blade 2.
- the second supplementary polarizer 18 is a reflection polarizer adapted to reflect a component of the light having a polarization orthogonal to the aforementioned output polarization.
- a light beam received from outside the head-up display 1 (typically due to solar radiation) and reflected to the image-generating device 3 by the folding mirror 4 will be partially reflected by the second polarizer 18, which will limit a possible warm-up of the screen 8 because of such an outer light beam.
- the second additional polarizer 18 transmits the component of the light having the aforementioned output polarization so that the light emitted at the output of the screen 8 (which has this output polarization due to the use of the output polarizer 14 ) is integrally transmitted by the second supplementary polarizer 18.
- the image generation device 3 is here received in a support 20.
- the support 20 carries a printed circuit 22 (on which the light source 5 is mounted), the diffuser assembly 7 - the first additional polarizer 1 6, the screen 8 and the folding mirror 4.
- the support 20 also carries the second additional polarizer 18. It may further be provided that the second additional polarizer 18 is mounted in the support 20 so as to close a light-passing window provided for in FIG. the support 20 downstream of the screen 8 (in the direction of the path of the light), as can be seen in FIG. The screen 8 is thus received in a closed enclosure formed by the printed circuit 22, the support 20 and the second additional polarizer 18.
- An opening 24 is formed in the support 20 so as to allow the passage of the light reflected by the folding mirror 4 towards the partially transparent blade 2.
- the aforementioned opening is closed by a translucent wall 26 (made for example of polycarbonate).
- the second additional polarizer 18 ' can then be located at this translucent wall 26.
- the second additional polarizer 18 may for example be deposited on the inner face (face facing the folding mirror 4) of the translucent wall 26 to protect it from external aggression.
- the second additional polarizer 18 'could itself close the opening in the support 20 (the translucent wall can be omitted).
- the second additional polarizer could be deposited (for example according to a rolling method, with optional interposition of a transparent adhesive) on the exit face of the screen 8 (face turned towards the folding mirror 4), precisely on the output polarizer 14.
- FIG. 4 represents an alternative embodiment that can be envisaged for the elements of FIG. 2.
- the image generation device here again comprises a diffuser 57 and a screen 58.
- the screen 58 comprises, as in the case of FIG. 2, an input polarizer 60, a liquid crystal matrix 62 and an output polarizer 64.
- the input polarizer 60 is an absorption polarizer adapted to selectively transmit a component of the light having a given input bias and the output polarizer 64 is a suitable absorption polarizer selectively transmitting a component of the light having a given output polarization, generally orthogonal (ie perpendicular) to the input polarization.
- the image generation device comprises a first additional polarizer 66, carried here by the screen 58, precisely by the input face of the screen 8 (facing face of the diffuser 7).
- the first additional polarizer 66 is a reflection polarizer adapted to reflect a component of the light having a polarization orthogonal to the aforementioned input bias and to transmit a component of light having this input bias.
- the first additional polarizer 66 is for example laminated (that is to say deposited by a rolling method, allowing a deposit without creating an air bubble) on the input polarizer 60 of the screen 58, possibly with interposition of a transparent glue.
- the image generation device also comprises here a second additional polarizer (not shown) of the same type as the second additional polarizer 18 described above with reference to FIGS. 1 and 2.
- the first additional polarizer 16, 66 is carried either by the diffuser 7, or by the screen 58. It could alternatively be provided that the first additional polarizer 16, 66 is located between the diffuser and the screen, remote from the broadcaster and remote from the screen.
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Liquid Crystal (AREA)
- Instrument Panels (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1657045A FR3054328B1 (fr) | 2016-07-22 | 2016-07-22 | Dispositif de generation d'image et afficheur tete haute |
PCT/EP2017/068387 WO2018015501A1 (fr) | 2016-07-22 | 2017-07-20 | Dispositif de génération d'image et afficheur tête haute |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3488273A1 true EP3488273A1 (fr) | 2019-05-29 |
Family
ID=56943815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17745695.1A Pending EP3488273A1 (fr) | 2016-07-22 | 2017-07-20 | Dispositif de génération d'image et afficheur tête haute |
Country Status (5)
Country | Link |
---|---|
US (1) | US11204496B2 (fr) |
EP (1) | EP3488273A1 (fr) |
CN (1) | CN109690370A (fr) |
FR (1) | FR3054328B1 (fr) |
WO (1) | WO2018015501A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10712558B2 (en) | 2018-12-17 | 2020-07-14 | Denso International America, Inc. | Head-up display device |
US11880097B2 (en) * | 2021-01-15 | 2024-01-23 | Denso International America, Inc. | Heads up display with textured surface |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5709463A (en) * | 1996-08-13 | 1998-01-20 | Delco Electronics Corporation | Backlighting for bright liquid crystal display |
US6204901B1 (en) * | 1997-07-31 | 2001-03-20 | Duke University | Liquid crystal color shutters that include reflective polarizers that pass color components of light of a first polarization and that reflect a majority of color components of light of a second polarization |
JP2000028957A (ja) * | 1998-07-07 | 2000-01-28 | Asahi Glass Co Ltd | 情報表示装置 |
JP4114194B2 (ja) * | 1998-10-29 | 2008-07-09 | 日本精機株式会社 | ヘッドアップディスプレイ装置 |
KR100699963B1 (ko) * | 2002-10-17 | 2007-03-28 | 샤프 가부시키가이샤 | 표시 장치 및 표시 장치 탑재 기기 |
DE102011014145A1 (de) * | 2010-12-23 | 2012-06-28 | Continental Automotive Gmbh | Head-up-Display für ein Kraftfahrzeug |
CN202013463U (zh) * | 2011-02-22 | 2011-10-19 | 余卫华 | 一种单片式液晶投影机的照明装置 |
JP2015118272A (ja) * | 2013-12-18 | 2015-06-25 | 株式会社 オルタステクノロジー | ヘッドアップディスプレイ装置用液晶表示装置及びヘッドアップディスプレイ装置 |
JP6247952B2 (ja) * | 2014-02-13 | 2017-12-13 | 株式会社 オルタステクノロジー | ヘッドアップディスプレイ装置 |
FR3028963B1 (fr) * | 2014-11-21 | 2016-12-23 | Valeo Comfort & Driving Assistance | Systeme de protection pour afficheur, notamment tete haute, et afficheur associe |
-
2016
- 2016-07-22 FR FR1657045A patent/FR3054328B1/fr active Active
-
2017
- 2017-07-20 WO PCT/EP2017/068387 patent/WO2018015501A1/fr unknown
- 2017-07-20 US US16/319,645 patent/US11204496B2/en active Active
- 2017-07-20 CN CN201780056330.4A patent/CN109690370A/zh active Pending
- 2017-07-20 EP EP17745695.1A patent/EP3488273A1/fr active Pending
Also Published As
Publication number | Publication date |
---|---|
CN109690370A (zh) | 2019-04-26 |
US20210141218A1 (en) | 2021-05-13 |
US11204496B2 (en) | 2021-12-21 |
FR3054328B1 (fr) | 2019-08-16 |
FR3054328A1 (fr) | 2018-01-26 |
WO2018015501A1 (fr) | 2018-01-25 |
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