EP3132309A1 - Systeme de generation d'images pour afficheur tete haute et afficheur tete haute associe - Google Patents
Systeme de generation d'images pour afficheur tete haute et afficheur tete haute associeInfo
- Publication number
- EP3132309A1 EP3132309A1 EP15725748.6A EP15725748A EP3132309A1 EP 3132309 A1 EP3132309 A1 EP 3132309A1 EP 15725748 A EP15725748 A EP 15725748A EP 3132309 A1 EP3132309 A1 EP 3132309A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- screen
- filter
- support plate
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- G02F1/133603—Direct backlight with LEDs
-
- 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
- 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
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- 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
-
- 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
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Definitions
- the invention relates to image generation systems, especially for head-up displays.
- the invention relates to an image generation system and a head-up display for a motor vehicle.
- the invention will find applications, for example, in motor vehicles to inform users of the vehicle, especially its driver.
- TFT-LCD screens require, for the display of an image, a backlight usually made by a plurality of light-emitting diodes (LED or LED for Light-Emitting Diode).
- LED light-emitting diodes
- this TFT-LCD screen and the backlight are included in a set called image generation system.
- these TFT-LCD screens have the disadvantage of significantly reducing the light power from the backlight: with the use of a conventional TFT-LCD screen, it is estimated that the transmission rate of the screen is d 'about 5% of the light output of the backlight. This low value is due in particular to the first polarizer present in the screen which allows only the light corresponding to a certain polarization, whereas the LEDs produce light with several polarizations: all the polarizations do not correspond to that which passes through the polarizer are then lost.
- the invention aims to overcome at least some of the disadvantages of image generation systems and known displays.
- the invention also aims to provide, in at least one embodiment of the invention, a display that displays an image with sufficient light output.
- the invention also aims to provide, in at least one embodiment, a display and an image generation system which make it possible to use a backlight with a lower power and thus to reduce the power consumption and the power consumption. heat dissipation.
- the invention also aims to provide, in at least one embodiment of the invention, a display and a system for generating images of reduced size.
- the invention relates to an image generation system for a display, in particular a head-up display, comprising:
- said backlighting device comprises: a support plate
- At least one light-emitting diode disposed on the support plate and emitting light towards the screen, a wall having a reflective inner surface defining a space between the support plate and the screen, said wall extending above at least a portion of the support plate so that the inner surface of the wall thus extended allows the light to pass in the direction of the screen and reflects towards the screen of the light propagating towards the support plate .
- An image generation system thus allows the recycling of the light emitted by the light-emitting diodes of the backlighting device coming from a reflection of part of the light in the direction of the support plate. reflection is caused by the passage through the light of the various elements placed between the light emitting diodes and the screen, and by the screen itself. All of these elements are called optical system. This portion of the light again passes through the optical system and is then reflected on the extension of a wall above the support plate to be returned to the screen.
- the wall defines a space between the support plate and the screen, forming for example a housing around the backlight device.
- the extension of this wall is called in the following description box bottom.
- the optical system and the case bottom cause a change in the characteristics of the part of the reflected light which, by crossing the optical system again in the direction of the screen, will be partly transmitted to the screen and partly to the screen. again reflected in the direction of the support plate.
- the extension of the wall surrounding the device on the surface of the support plate to create this case bottom makes it possible not to add an additional element to the image generation system, the wall being necessary for the generation system. images to prevent light leakage and to homogenize the light, but only to add material to an already existing piece.
- the surface of the wall has a coefficient of Reflection greater than 90%, preferably greater than 93%.
- the surface of the extended wall is located at least above a portion of the support plate.
- the wall extends substantially over the entire surface of the support plate with the exception of the surface occupied by the light-emitting diodes so as to reflect almost all of the light propagating in direction of the support plate.
- the wall extended above the support plate is positioned at a distance from said support plate so that an air gap can be established between the wall and the support plate.
- the backlighting device comprises at least one light recycling filter emitted by the light-emitting diodes, located between the light-emitting diodes and the screen, ensuring the transmission of a part of the light towards the screen and the return of non-transmitted light to the light-emitting diodes.
- the recycling filter makes it possible to send a portion of the light back to the light-emitting diodes.
- This part of the reflected light is advantageously light whose characteristics do not comply with the characteristics necessary for good quality backlighting, in particular because this part of the light would have been lost at the level of the liquid crystal screen. .
- This part of the light is then reflected on the caseback in the direction of the screen. This reflection as well as the crossing of the various elements of the optical system allow a modification of the characteristics of the light which go back to the recycling filter.
- At least one light recycling filter is a polarization filter adapted to let the light arriving on the polarization filter with a particular polarization and adapted to reflect light arriving on the polarization filter with a polarization different from the particular polarization.
- the liquid crystal screen only allowing the light having a particular polarization due to the presence of a polarizer in the screen
- the polarization filter makes it possible to reflect the part of the light whose polarization is different from this particular polarization.
- the light usually lost at the LCD screen is reflected back to the caseback.
- the caseback and the optical system allow a change in the polarization of the reflected light, and said reflected light in the direction of the screen is filtered again by the polarization filter.
- At least one light recycling filter is a prismatic filter adapted to allow the light arriving on the prismatic filter to pass through with an angle of incidence less than a predetermined angle and in a given plane, and adapted to reflect the part of the remaining light.
- the prismatic filter makes it possible to let only the light arriving substantially perpendicular to the filter in a given plane, in order to reduce the divergence of the light in the direction of the liquid crystal screen.
- the light reflected by the prismatic filter is reflected back onto the caseback disposed on the support plate and returns to the prismatic filter, and a portion of this reflected light arriving on the filter with an angle of incidence smaller than the predetermined angle passes through the filter and another part is reflected again.
- the backlighting device comprises at least two prismatic filters, each filtering according to the incidence of light according to a plane, and arranged so that the planes in which they filter the incidence are substantially perpendicular.
- the addition of a second filter filter in a given plane different from the first filter allows the filtering of a larger part of the light.
- the backlighting device comprises a lens array adapted to collimate the light coming from the light-emitting diodes in the direction of the liquid crystal screen.
- the light-emitting diodes emitting light in a substantially omnidirectional manner
- the lens array makes it possible to obtain a collimated light directed towards the liquid crystal screen in order to limit the losses.
- the backlight device comprises a diffuser adapted to homogenize the light from the light emitting diodes.
- the homogenization of the light allows a good distribution of light on the liquid crystal screen.
- the diffuser also makes it possible to mask the inside of the backlighting device.
- the liquid crystal screen is inclined at a predefined angle with respect to the support plate and the recycling filter or filters.
- the predefined angle makes it possible to obtain a vertical virtual image as part of the use of the image generation system in a head-up display.
- the image generation system comprises, successively and in this order, between the support plate and the screen:
- the lens network the broadcaster
- the invention also relates to a display, in particular a head-up display, characterized in that it comprises an image generation system according to the invention.
- the invention also relates to an image generation system and a display characterized in combination by all or some of the characteristics mentioned above or below.
- FIG. 1 is a schematic view of a section of an image generation system according to one embodiment of the invention
- FIG. 2 is a schematic view of a support plate of an image generation system according to one embodiment of the invention.
- FIG. 3 is a schematic perspective view of the housing of an image generation system according to one embodiment of the invention.
- Figure 4 is a schematic view of an image image generation system and a head-up display according to the invention.
- FIG. 1 represents a schematic view of a section of a system 10 of image generation according to one embodiment of the invention.
- the image generation system 10 comprises a liquid crystal screen, here a thin film transistor LCD 12 and a backlighting device 14.
- Thin-film transistor LCD 12 is commonly referred to as a TFT-LCD (for Thin-Film Transistor Liquid Crystal Display), and allows image formation by the image generation system.
- the backlighting device 14 comprises in particular at least one and preferably a set of light emitting diodes 16, also called LEDs or LEDs (for Light Emitting Diodes in English, and used in the following description), placed on a light-emitting diode. support plate.
- the support plate consists of a printed circuit 18, also called PCB (for Printed Circuit Board in English).
- the printed circuit used may for example be type F 4 (for Flame Resistant 4 in English) or IMS (for Insulated Metal Substrate in English).
- IMS Insulated Metal Substrate in English
- the printed circuit board 18 allows both the physical medium and the electrical connection (to a power supply and any other electronic components not shown) of the LEDs 16.
- the LEDs 16 are placed so as to emit light in the direction of the light. screen 12.
- the screen 12 is inclined by a predefined angle, preferably between 0 ° and 40 ° so as to obtain a vertical virtual image in the context of the use of the image generation system in a display head held high.
- these elements forming part of the backlighting device 14 and successively traversed by the light coming from the LEDs 16 in the direction of the screen 12, are:
- the lens array 20 comprises a lens by LED 16, each lens being disposed above each LED 16.
- a diffuser 22 allowing the homogenization of the light, so as to illuminate the screen 12 in a homogeneous manner to allow the formation of an image of good quality, that is to say substantially uniform brightness.
- the diffuser 22 makes it possible to mask the inside of the backlight device,
- one or more recycling filters grouped under the reference 24, for example: two crossed prismatic filters, allowing the light arriving on the prismatic filters to pass through with an angle of incidence less than a predetermined angle and in a given plane perpendicular to the plane of the prismatic filter.
- a light beam arriving on a prismatic filter with an angle of incidence greater than the predetermined angle and in a plane different from the given plane will be even less reflected that said plane of incidence of the beam is different from the given plane.
- the use of the two crossed prismatic filters in particular filters in substantially perpendicular planes, makes it possible to filter the major part of the light beams, so that the light beams arriving on the filter outside a cone of incidence of angle equal to the predetermined angle will be reflected.
- Prismatic filters are here films of polymer material composed of a multitude of microprisms aligned in the plane of the prismatic filter along lines perpendicular to the given plane.
- This type of film is for example marketed by 3M under the name of BEF (for Brightness Enhancement Film in English).
- a polarization filter for passing light arriving on the polarization filter with a particular polarization and adapted to reflect the light arriving on the polarization filter with a different polarization.
- the light emitted by the LEDs 16 being a non-polarized light, only the portion of this light having a polarization collinear with this particular polarization passes through the polarization filter, the rest of the light being reflected.
- the polarization filter is here a film of polymer material. This type of filter is marketed for example by the company 3M under the name of DBEF (for Dual Brightness Enhancement Film in English).
- the various recycling filters 24 therefore make it possible, for example, to reflect light which would have been filtered at the level of the screen 12 itself because of its internal components, in particular straight polarisers, by reflection of the light which does not have any light. polarization, or to reflect light that propagated in a cone of lighting too wide. This portion of the light reflected by the recycling filter (s) in the direction of the printed circuit is subsequently called recycled light.
- the space contained therein, between the printed circuit 18 and the screen 12 is surrounded by a wall, here a housing 28, generally called light box especially in the automotive field.
- a housing 28 is made of a reflective material such as polycarbonate (abbreviated PC).
- PC polycarbonate
- the housing 28 must have a very flat polished surface.
- the housing 28 of the image generation system 10 is extended substantially on or above the entire surface of the printed circuit 18 with the exception of the area occupied by the LEDs 16 and which reflects almost all the light recycled, which then propagates back to the screen 12.
- the portion of the housing 28 which extends on the surface of the printed circuit is called the bottom of the housing 26 in the following description.
- the bottom of the case 26 is made of the same material as the case.
- the bottom of the housing 26, the optical system and the housing 28 allow, because of the reflection of the light on or through their respective surfaces, to modify the characteristics of the recycled light, in particular its polarization and its direction of spread.
- the recycled light which is reflected by the bottom of the housing 26 and which propagates towards the screen 12 has a different polarization and an angle of incidence with the recycling filter or filters different, and therefore can cross the or recycling filters 24 if these characteristics allow the passage of light through the filter or filters 24 recycling. If the light still does not have the characteristics necessary for crossing the recycling filter or filters, the light is recycled again and the cycle described above is repeated.
- This cycle is represented in FIG. 1 by arrows 30, 31, 32, 34, 36, 37.
- the LEDs 16 emit unpolarized light.
- Two arrows 30, 31 represent two parts of this polarized light, of respective polarizations P1 and P2.
- the polarization filter passes the portion of the light whose polarization is equal to P1.
- the portion of the polarization light P1 therefore passes through the polarization filter and moves towards the screen 12 in the direction represented by the arrow 32. and the portion of the polarization light P2 is recycled, that is, reflected back to the printed circuit 18, as represented by the arrow 34.
- This portion of the recycled light is reflected on the bottom of the housing 26 in the direction of the screen 12, and a part of this reflected light has a modified polarization henceforth equal to PI, represented by the arrow 36.
- This part of the polarization light PI therefore passes through the polarization filter after recycling and reflection, as shown on the arrow 37.
- the same phenomenon occurs in a similar way according to the angle of incidence of the light, thanks to the prismatic filters.
- the case bottom 26 does not cover the LEDs 16 so as not to obscure them and thus to allow the backlighting of the screen 12.
- the only part of the recycled light that is not reflected towards the screen 12 is therefore the light that arrives on the printed circuit 18 on the surface occupied by the LEDs 16.
- the holes formed by the margin around each LEDs can be beveled so as to optimize the reflective surface without disturbing the screen illumination.
- the case bottom 26 being an extension of the case 28, it is composed of the same material as the case, that is to say in this embodiment of the polycarbonate. This material has important reflection coefficients if it has a sufficiently polished surface. In practice and for proper operation of the backlighting device, the reflection coefficient is greater than or equal to 90%, preferably greater than or equal to 93%.
- Other materials may be envisaged for the case bottom 26, provided that these are also adapted to the other constraints of the image generation system 10, in particular thermal stresses: the case bottom 26 surrounds the LEDs 16 which emit with a high luminous power and therefore give off heat. This heat can alter the bottom case 26 if it is not made of a suitable material. This thermal stress is all the more important that the image generation system 10 is in an environment of limited size in which the heat evacuation is difficult, typically for on-board use, for example in a vehicle.
- the housing may be fixed on the support plate, for example by gluing, screwing, crimping, etc.
- the box attached to the support plate reduces disturbances with the cone of light emitted by the LEDs.
- the housing may be placed above the support plate so as to leave a blade of air between the two, allowing ventilation and therefore better heat dissipation.
- the housing may be arranged above the support plate by means of a spacer mounting.
- the margin between each LEDs and the beveling of the holes is adapted so as not to disturb the cone of light emitted by the LEDs.
- FIG. 2 represents a schematic view of a printed circuit 18 of an image generation system 10 according to one embodiment of the invention.
- the LEDs 16 of the backlighting device 14 are here eight in number, distributed uniformly over the entire surface of the printed circuit 18. Each LED is composed of a base 16a and an optical portion 16b.
- the LEDs 16 are surrounded by the case bottom 26 which occupies the surface of the printed circuit 18 which is not occupied by the LEDs 16.
- a margin area is provided around each LED 16 on which there is no case bottom 26 to prevent the case bottom 26 from disturbing the emission of light by the LEDs 16 and to prevent the case bottom 26 is altered by too much heat dissipation by the LEDs.
- FIG. 3 schematically shows in perspective the housing 28 of the image generation system 10 according to one embodiment of the invention.
- the entire housing 28 is composed of the same reflective material, for example polycarbonate as described above.
- the entire housing 28 can thus for example be manufactured in a single mold.
- the walls 38 of the box make it possible to surround the space of the backlight device, and the case bottom 26 is provided with orifices 40 adapted to be placed at the level of the LEDs 16 as represented with reference to FIG. 2.
- the housing 28 in FIG. 3 is represented by way of example: in particular, the dimensions of the housing are caused to be modified as a function of the size of the screen 12, the number of LEDs 16, the number of elements between the support plate and screen 12, etc.
- the invention also relates to a head-up display comprising a system 10 for generating image images according to the invention.
- the image generation system 10 described with reference to FIG. 1 forms an image using the TFT-LCD screen 12.
- said display Downstream of the screen 12 in the direction of movement of the light beam, said display comprises at least one semi-reflective plate 126 and a reflection device 125 interposed on the path of the image between the screen 12 and the semi blade reflector 126, the reflection device 125 comprising one or more planar or concave mirrors, as shown in FIG. 4.
- the path of the image is symbolized by three dotted arrows which are reflected on the device of FIG. reflection 125 before displaying through the semi-reflecting blade 126.
- the latter allows a magnification and / or, by transparency, a display of the image beyond the semi-reflective blade, particularly beyond the pare -brise vehicle equipped, at a virtual screen 130, obtained using the semi-reflecting blade 126.
- This blade 126 has a reflectivity at least equal to 20%, which allows the user to see through the blade the road taken by the vehicle, while enjoying a high contrast to see the image displayed.
- the display of the image can take place at the windshield of the vehicle equipped with said display.
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- 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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1400929A FR3020148B1 (fr) | 2014-04-17 | 2014-04-17 | Systeme de generation d'images pour afficheur et afficheur associe |
PCT/FR2015/051032 WO2015159030A1 (fr) | 2014-04-17 | 2015-04-16 | Systeme de generation d'images pour afficheur tete haute et afficheur tete haute associe |
Publications (1)
Publication Number | Publication Date |
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EP3132309A1 true EP3132309A1 (fr) | 2017-02-22 |
Family
ID=51982593
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15725748.6A Ceased EP3132309A1 (fr) | 2014-04-17 | 2015-04-16 | Systeme de generation d'images pour afficheur tete haute et afficheur tete haute associe |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3132309A1 (fr) |
FR (1) | FR3020148B1 (fr) |
WO (1) | WO2015159030A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3054326B1 (fr) * | 2016-06-29 | 2022-07-15 | Valeo Comfort & Driving Assistance | Dispositif de generation d'images comprenant une zone de contact thermique, et afficheur tete haute associe |
FR3054046B1 (fr) * | 2016-06-29 | 2018-08-17 | Valeo Comfort And Driving Assistance | Dispositif de generation d'images et afficheur tete haute associe |
WO2018066912A1 (fr) * | 2016-10-05 | 2018-04-12 | 엘지이노텍(주) | Dispositif d'affichage tête haute |
US10788669B1 (en) | 2019-04-09 | 2020-09-29 | Denso International America, Inc. | System and assembly for controlling temperature in head-up displays |
Citations (3)
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EP1220186A1 (fr) * | 2000-07-31 | 2002-07-03 | Nippon Seiki Co., Ltd. | Dispositif d'eclairage arriere |
JP2009237220A (ja) * | 2008-03-27 | 2009-10-15 | Nippon Seiki Co Ltd | 表示装置 |
JP2013178357A (ja) * | 2012-02-28 | 2013-09-09 | Nippon Seiki Co Ltd | 表示装置 |
Family Cites Families (4)
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DE10245580B4 (de) * | 2002-09-27 | 2006-06-01 | Siemens Ag | Einrichtung zur Erzeugung eines Bildes |
US7513668B1 (en) * | 2005-08-04 | 2009-04-07 | Rockwell Collins, Inc. | Illumination system for a head up display |
JP2009087716A (ja) * | 2007-09-28 | 2009-04-23 | Sharp Corp | 照明装置、グレア抑制部材及び照明方法 |
JP5651709B2 (ja) * | 2010-12-16 | 2015-01-14 | パナソニックIpマネジメント株式会社 | バックライト装置および液晶表示装置ならびにレンズ |
-
2014
- 2014-04-17 FR FR1400929A patent/FR3020148B1/fr active Active
-
2015
- 2015-04-16 EP EP15725748.6A patent/EP3132309A1/fr not_active Ceased
- 2015-04-16 WO PCT/FR2015/051032 patent/WO2015159030A1/fr active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1220186A1 (fr) * | 2000-07-31 | 2002-07-03 | Nippon Seiki Co., Ltd. | Dispositif d'eclairage arriere |
JP2009237220A (ja) * | 2008-03-27 | 2009-10-15 | Nippon Seiki Co Ltd | 表示装置 |
JP2013178357A (ja) * | 2012-02-28 | 2013-09-09 | Nippon Seiki Co Ltd | 表示装置 |
Non-Patent Citations (1)
Title |
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See also references of WO2015159030A1 * |
Also Published As
Publication number | Publication date |
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WO2015159030A1 (fr) | 2015-10-22 |
FR3020148B1 (fr) | 2019-06-28 |
FR3020148A1 (fr) | 2015-10-23 |
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