EP4232866A1 - Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device - Google Patents

Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device

Info

Publication number
EP4232866A1
EP4232866A1 EP21799042.3A EP21799042A EP4232866A1 EP 4232866 A1 EP4232866 A1 EP 4232866A1 EP 21799042 A EP21799042 A EP 21799042A EP 4232866 A1 EP4232866 A1 EP 4232866A1
Authority
EP
European Patent Office
Prior art keywords
screen
partially transparent
transparent element
face
assembly device
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
Application number
EP21799042.3A
Other languages
German (de)
French (fr)
Inventor
Ayoub BEN NACHOUANE
Laurent DELPIERRE
Eric Blanc
Laurent Sauzay
Stephane Botta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Comfort and Driving Assistance SAS
Original Assignee
Valeo Comfort and Driving Assistance SAS
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 Valeo Comfort and Driving Assistance SAS filed Critical Valeo Comfort and Driving Assistance SAS
Publication of EP4232866A1 publication Critical patent/EP4232866A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01—Head-up displays
    • G02B27/0149—Head-up displays characterised by mechanical features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/008—Mountings, adjusting means, or light-tight connections, for optical elements with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation

Definitions

  • Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device
  • the present invention relates to techniques for assembling a screen with a partially transparent element, in particular for a vehicle head-up display.
  • the principle of head-up displays is to project images, in particular useful for driving, directly into a driver's field of vision.
  • head-up displays generally comprise an image generation device suitable for generating images and a device for projecting the generated images suitable for transmitting these images to a partially transparent blade placed in the field of vision of the driver, so that he can see these images and any information they contain without having to look away.
  • This partially transparent blade is generally constituted either by the windshield of the vehicle, or by a dedicated combiner, placed between the windshield and the driver's eyes.
  • Most of the image generation devices used today comprise a light source backlighting a screen (for example a screen of the TFT-LCD type) adapted to generate the images which are then transferred to an optical system generally comprising at least one magnifying mirror, before reaching the partially transparent blade.
  • a screen for example a screen of the TFT-LCD type
  • the head-up display comprises a box (generally opaque) which contains the image-generating device and the optical system in order to protect these elements against possible external attacks (dust, liquids, etc.).
  • the screens in question absorb part of the light which backlights them, which causes them to heat up.
  • the concentration rate of the solar flux is proportional to the magnification rate of the optical system of the head-up display. Indeed, the higher the magnification rate, the more the system is able to focus sunlight on the screen.
  • partially transparent element of higher thermal conductivity than that of glass, directly plated on the screen in order to drain its heat towards a cold source.
  • partially transparent elements can consist of a ceramic plate; for example, a single crystal (sapphire type in particular) is used.
  • the ceramic plates can hardly be cut to the same size as the screen, which makes the assembly of the different layers relatively difficult. Added to this is the fact that the ceramic plate must always have perfect contact with a heat sink to facilitate heat drainage, which further complicates assembly.
  • the centering of the screen with respect to the various surrounding optical elements is not easy to achieve.
  • any deviation in the position of the screen has an impact on the shape of the virtual image; it may lose its rectangular shape and generate a distortion effect associated with a double image known as "Ghost Image”.
  • the present invention proposes an assembly device suitable for assembling a screen comprising a central active part and a partially transparent element, with a contact face of said screen pressed against a contact face of said partially transparent element, characterized in that it comprises a support frame provided with a central opening suitable for positioning said central active part of said screen, which support frame comprises means for fixing said screen, and means for fixing said partially transparent element.
  • Such an assembly device makes it possible to assemble the screen and the partially transparent element in a simple manner, with a minimum of constraints on the screen. It also facilitates the fixing of the screen and of the partially transparent element on a support structure (for example the case of the head-up display) and makes the centering of the screen simpler and more precise.
  • said support frame comprises:
  • Said screen receiving face may comprise said means for fixing said screen, and said partially transparent element receiving face may comprise said means for fixing said partially transparent element.
  • said screen support plane is defined by two opposing plane parts arranged along a first axis
  • said partially transparent element support plane is defined by two plane parts in opposition arranged along a second axis perpendicular to said first axis.
  • said support frame may comprise (a) a recessed housing for said partially transparent element, the contour of which corresponds, except for clearance, to the contour of said partially transparent element, and (b) a housing embedding for said screen, the outline of which corresponds, except for clearance, to the outline of said screen.
  • Said means for fixing said screen, and said means for fixing said partially transparent element may consist of elastic interlocking means of the type with a latching tab provided with a locking lug.
  • the support frame may comprise at least two centering studs provided projecting from said partially transparent element receiving face, which centering studs are adapted to cooperate with mounting holes provided on a structure of support.
  • the support frame may also comprise at least two fixing holes, each adapted for the passage of a clamping screw for fixing it to a support structure.
  • the invention also proposes an image generating device comprising a light source producing a light beam and a screen through which the light beam passes and designed to modify the light beam so as to form an image, which generating device image device further comprises a partially transparent element through which the light beam passes and arranged to limit heating of said screen, and which image generating device further comprises a support structure provided with a window delimited by a window rim, on which around the window is fixed an assembly device as defined above, which assembly device supports said screen and said partially transparent element.
  • the support structure may be provided with a window delimited by a window rim comprising mounting holes in which the centering tenons of said support frame fit.
  • the support structure can also be provided with a window delimited by a window periphery comprising fixing holes for fixing said support frame by means of clamping screws.
  • said support structure may consist of a heat sink, or is thermally connected to a heat sink.
  • said support structure comprises an upstream face, oriented on the side of said light source, and a downstream face, oriented on the opposite side to said light source, said assembly device which supports said screen and said partially transparent element being fixed on said downstream face of said support structure, with said partially transparent element oriented in the direction of said light source.
  • said support structure comprises an upstream face, oriented on the side of said light source, and a downstream face, oriented on the side opposite to said light source, said assembly device which supports said screen and said partially transparent element being attached to said upstream face of said support structure, with said partially transparent element oriented in the opposite direction to said light source.
  • the invention also proposes a head-up display, for example intended to equip a motor vehicle, comprising an image generation device as proposed above, and an optical system adapted to transmit in the direction of a blade partially transparent images generated by said image generation device.
  • the head-up display comprises a protective casing, which protective casing comprises said support structure provided with a window delimited by a window surround, on which window surround is fixed said device assembly supporting said screen and said partially transparent element.
  • FIG. 1 schematically represents the main elements of a head-up display according to the invention
  • FIG. 2 is a schematic perspective view of a possible embodiment of the assembly device according to the invention, seen from the side of its face intended to receive the screen;
  • FIG. 3 is a schematic perspective view of the assembly device illustrated in FIG. 2, seen from the side of its face intended to receive the partially transparent element;
  • FIGS. 2 and 3 is a schematic perspective view of the assembly device illustrated in FIGS. 2 and 3, on which the partially transparent element and the screen are assembled, seen here from the side where the partially transparent element is mounted;
  • FIG. 5 is a schematic perspective view of the equipped assembly device, as illustrated in FIG. 4, seen here from the screen mounting side;
  • FIG. 6 is a schematic view in perspective and in section which illustrates the assembly of the assembly device equipped with the screen and the partially transparent element, on a support structure;
  • FIG. 7 schematically presents a possibility of mounting the assembly device equipped with the screen and the partially transparent element, on the protective case of a head-up display;
  • FIG. 8 schematically presents another possibility of mounting the assembly device equipped with the screen and the partially transparent element, on the protective case of a head-up display.
  • the head-up display 2 represented in FIG. 1 comprises an image-generating device 4, which generates an upstream light beam Fi, and an optical system 6, which receives this upstream light beam Fi as input and projects outputs a downstream light beam Ff in the direction of a partially transparent blade 7, here the windshield of a vehicle (typically a motor vehicle) fitted with the head-up display 2.
  • the downstream light beam Ff is thus incident on the partially transparent blade 7 and partially reflected on this partially transparent blade 7 in the direction of the driver's eyes (schematically represented by the reference O in FIG. 1).
  • the light beam (generated by the image generation device 4 and transmitted as just indicated to the driver's eyes O) represents an image to be displayed, which the driver will thus see beyond the partially transparent blade 7, in the environment (outside the vehicle) facing it, without having to look away.
  • the virtual image thus seen by the driver has been represented under the reference I.
  • the image generating device 4 comprises a light source 11 and a screen 12.
  • the image generating device 4 again comprises here, between the light source 11 and the screen 12, a reflector 13 and a diffuser 14.
  • the optical system 6 is formed here of two mirrors 15 etl6.
  • the optical system 6 used here indeed comprises a first mirror (here a plane mirror) 15 placed opposite the image generating device 4 and a second mirror 16 (here a curved mirror, with a shape defined for example to obtain the sharp virtual image I).
  • the optical system 6 can comprise a single mirror, or a plurality of other types of mirrors and/or other optical elements such as one or more lenses for example.
  • the upstream light beam Fi is thus reflected on the first mirror 15 in the direction of the second mirror 16, then on the second mirror 16 in the direction of the partially transparent blade 7, as clearly visible in Figure 1.
  • the head-up display 2 also comprises a casing 8 (generally opaque) which encloses the image-generating device 4 and the optical system 6, in particular in order to protect these elements against possible external attacks (dust, liquids , etc.).
  • a casing 8 generally opaque which encloses the image-generating device 4 and the optical system 6, in particular in order to protect these elements against possible external attacks (dust, liquids , etc.).
  • the housing 8 comprises an opening 10 through which passes the light beam projected by the optical system 6 in the direction of the partially transparent blade 7 (that is to say here the light beam reflected by the second mirror 16) .
  • the opening 10 of the housing 8 is closed by a window 17 (sometimes called “cover window”) formed for example of a sheet of plastic material of the polycarbonate type with a thickness of between 0.25 mm and 0.75 mm.
  • a window 17 (sometimes called “cover window") formed for example of a sheet of plastic material of the polycarbonate type with a thickness of between 0.25 mm and 0.75 mm.
  • the partially transparent blade 7 can be a combiner dedicated to the head-up display 2, placed between the windshield of the vehicle and the eyes of the driver, on the path of the downstream light beam Ff.
  • the light source 11 consists of one or more light-emitting diodes (or LEDs for "Light Emitting Diode”).
  • This light source 11 backlights the screen 12 and the transmission of light from the light source 11 to the screen 12 has been represented by the orientation arrow L in Figure 1.
  • the screen 12 here is a liquid crystal display (or LCD for "Liquid Crystal Display”), for example of the type with thin film transistors (or TFT for "Thin Film Transistor”).
  • LCD liquid crystal display
  • TFT thin film transistors
  • Such an LCD screen 12 comprises an assembly of elements (or blades) in the form of plates, comprising in particular, in the direction of the path of the light L: an input polarizer, a matrix of liquid crystals and a polarizer Release.
  • the input polarizer and the output polarizer of the screen 12 can be absorption polarizer filters (hence significant heating at the level of these polarizers).
  • the input polarizer and the output polarizer of the screen 12 respectively have a first axis and a second axis perpendicular to each other (in the context of the so-called “normally off” technology, or NB for "normally black” ). It is recalled that the axis of a polarizer is the rectilinear polarization direction of the light beam after passing through the polarizer.
  • the light beam between the input polarizer and the output polarizer will be polarized along the first axis (axis of the input polarizer) and no light will therefore be emitted at the output of the output polarizer.
  • the polarization of certain parts of the light beam is modified at the level of the liquid crystal matrix so that the light is emitted at the output of the output polarizer at the regions corresponding to said portions of the light beam.
  • these blades or plates constituting the input polarizer, the liquid crystal matrix and the output polarizer can be associated with other blades or plates, such as glass plate(s), matrix of colored or other elements.
  • the screen 12 made up of its various blades or associated plates is in the form of a rectangular plate having a length which may be greater than 40 mm, a width which may be greater than 30 mm, and a thickness which may be greater than 1mm.
  • This rectangular plate has two opposite flat faces.
  • the screen 12 comprises a central active part 12a corresponding to the positioning of the liquid crystal matrix, bordered by a peripheral surround 12b. It also includes connectors (also called “LCD connector cable” or “TFT flex”), produced here in the form of electrical cables in a ribbon and not shown in FIG. 1, adapted to provide the screen 12 with its power supply and its control signals.
  • LCD connector cable also called “TFT flex”
  • FIG. 1 also shows the luminous flux Fs coming from the sun (hereinafter referred to as "solar flux Fs”), capable of entering the box 8 and coming to be concentrated on the screen 12 by effect magnifying glass due to the mirrors 15, 16 of the optical system 6, and therefore risking causing the screen 12 to overheat.
  • solar flux Fs the luminous flux coming from the sun
  • the image generation device 4 of the head-up display 2 comprises a partially transparency 18 associated with said screen 12.
  • this partially transparent element 18 is in the form of a plate, one of the faces of which is placed in contact with one face of the screen 12, this partially transparent element 18 thus being adapted to limit, or even avoid, heating of said screen 12, and/or to evacuate at least part of the heat generated at the level of said screen 12.
  • the partially transparent element 18 used is preferably a transparent ceramic, for example a single crystal such as sapphire.
  • simple oxide MgO, Al2O3, ZrO2, Y2O3, SC2O3 or LU2O3
  • complex oxide Y3Al5O12, MgAl2O4 or ZNAI2O4, even Lu 2 TiO3, Lu2Zr2O 7 , LusNbO?, LaGdZr 2 O 7 , Lag,33SisO
  • This partially transparent element 18 is used in the form of a plate or blade having two opposite flat faces and the thickness of which can be between 0.5 and 3 mm (for example between 0.8 and 1.2 mm ).
  • This plate or blade may have a rectangular shape, the length of which may be greater than or equal to 25 mm, and the width of which may also be greater than or equal to 25 mm.
  • the partially transparent element 18 is chosen from materials having a thermal conductivity greater than 5 W/mK and preferably greater than 40 W/mK, in order to obtain good heat dissipation.
  • the partially transparent character of the partially transparent element 18 (whose transmittance is advantageously between 80 and 90%) allows it to absorb part of the sunlight (of the order of 5% to 15% sunlight in the visible spectrum), thus protecting the screen 12.
  • the partially transparent element 18 can also be chosen to absorb in the infrared to contribute to reducing the thermal load in this region of the solar light spectrum (for example the sapphire makes it possible to filter the infrared beyond 5 pm) .
  • the screen 12 and the partially transparent element 18 are assembled by an assembly device 20, with a contact face of said screen 12 pressed against a face of contact with said partially transparent element 18, and this head-up display 2 comprises a support structure 22 on which said assembly device 20 is fixed.
  • the support structure 22 is an integral part of the image generation device 4. It can be part of the box 8 of the head-up display 2, or be integrated into this box 8.
  • FIGS. 4 and 5 show the two faces of the assembly device 20 equipped, one with the screen 12 and the other with the partially transparent element 18.
  • the corresponding assembly device 20 comprises a support frame 201, as well as fixing means 202 for fixing the screen 12, and fixing means 203 for fixing the partially transparent element 18.
  • the support frame 201 is of generally planar shape and it is provided with a central opening 2011, here rectangular, which is adapted to the positioning of the central active part 12a of the screen 12.
  • This support frame 201 is delimited by an outer border 2012, an inner border 2013 (which defines the central opening 2011), a screen receiving face 2014 and a partially transparent element receiving face 2015 (located opposite the screen receiving face 2014).
  • the screen receiving face 2014 of the support frame 201 (FIG. 2) comprises a mounting housing 204 arranged to receive the screen 12.
  • the recessed housing 204 for the screen 12 is delimited by an outline 205 and by a screen support plane 206 against which a contact face of said screen 12 is intended to bear.
  • the outline 205 of the mounting housing 204 corresponds, except for clearance, to the outline of the screen 12.
  • these two outlines have a generally rectangular shape.
  • the screen support plane 206 is defined by two plane parts 206a and 206b, in opposition, arranged along a first axis X on either side of the central opening 2011.
  • the two plan parts 206a and 206b extend along the two long sides of the rectangular central opening 2011.
  • the screen-receiving face 2014 comprises the aforementioned fixing means 202 of the screen 12.
  • These fixing means 202 of the screen 12 consist of elastic interlocking means of the snap-in tongue type 2021 fitted with a locking pin 2022.
  • These snap tabs 2021 are here 4 in number distributed around the periphery of the contour 205 of the mounting housing 204. They are each bordered by two lateral slots 2023 formed in the support frame 201 allowing their elasticity to be improved. .
  • a notch 207 adapted to the passage of the connectors of the screen 12. This notch 207 extends the plane part 206b of the support plane screen 206 to the outer edge 2012 of the support frame 201.
  • the partially transparent element receiving face 2015 of the support frame 201 (FIG. 3) comprises a mounting housing 208 arranged to receive the partially transparent element 18.
  • the embedding housing 208 for the partially transparent element 18 is delimited by an outline 208a and by a partially transparent element support plane 209 against which a contact face of said partially transparent element 18 is intended to come take support.
  • the outline 208a of the mounting housing 208 corresponds, except for clearance, to the outline of the partially transparent element 18.
  • these two outlines have a generally rectangular shape.
  • the partially transparent element support plane 209 is defined by two plane parts 209a and 209b, in opposition, arranged along a second axis Y on either side of the central opening 2011.
  • the two plan parts 209a and 209b extend along the two short sides of the rectangular central opening 2011.
  • the partially transparent element receiving face 2015 comprises the aforementioned means 203 for fixing the partially transparent element 18.
  • These fixing means 203 for the partially transparent element 18 are similar to the fixing means 202 of the screen 12. They consist of elastic interlocking means of the snap-in tongue type 2031 provided with a locking lug 2032.
  • These snap tabs 2031 are here 2 in number arranged vis-à-vis the edge of the plan parts 209a and 209b. In this case, they are placed approximately on the median axis of the length of the central opening 2011, that is to say centered or approximately centered on the width of the short sides of this central opening 2011.
  • the partially transparent element support plane 209 is located in the same plane as the screen support plane 206.
  • the dimension of the recessed housing 204 of the screen 12 and the dimension of the recessed housing 208 of the partially transparent element 18 are independent of each other and respectively adapted to the dimension of the screen 12 and that of the partially transparent element 18.
  • the surface of the partially transparent element plate 18 is much greater than the central opening 2011 of the support frame 201.
  • the support frame 201 therefore allows the fixing of the screen 12 on its screen receiving face 2014, and the fixing of the partially transparent element 18 on its partially transparent element receiving face 2015, with a contact face of said screen 12 pressed against a contact face of partially transparent element 18.
  • the face of the partially transparent element 18 intended to be in contact with one face of the screen 12 can be one or the other of its two opposite flat faces.
  • the face of the screen 12 intended to be in contact with a face of the partially transparent element 18 can be one or the other of its two opposite faces.
  • the contact faces of the screen 12 and of the partially transparent element 18 are those which bear against the plane parts 206a and 206b, on the one hand, and on the parts of plan 209a and 209b, on the other hand.
  • the support frame 201 further comprises centering studs 2016, projecting from the receiving face of the partially transparent element 2015, which are adapted to cooperate with recessed holes provided on the support structure 22 of the head-up display 2.
  • These 2016 centering studs are here two in number, but there could be more of them. In the illustrated embodiment they are arranged on the short sides of the rectangular support frame 201.
  • the support frame 201 also comprises fixing holes 2017 each adapted to the passage of a tightening screw for fixing the assembly device 20 on the support structure 22 of the head-up display 2.
  • These 2017 fixing holes are here two in number, but they could be more numerous. In the illustrated embodiment they are arranged on the short sides of the rectangular support frame 201.
  • the equipment of the assembly device 20 consists in positioning the partially transparent element 18 and the screen 12 in their respective recessed housing 208 and 204, on the dedicated faces 2015 and 2014 of the support frame 201, such as shown in Figures 4 and 5.
  • the partially transparent element plate 18 is fitted or snapped into its recessed housing 208 by exerting a force separating the two locking lugs 2032 from the snap tabs 2031.
  • the outline 208a of the mounting housing 208 which corresponds to the outline of the partially transparent element 18, ensures locking of the latter on the assembly device 20 without the possibility of movement. In position, this prevents the partially transparent element 18 from slipping under the effect of vibrations.
  • the screen 12 is also nested or snapped into its recessed housing 204 by exerting a force separating the four locking lugs 2022 from the snap tabs 2021.
  • the side of the screen 12 opposed to connectors 12c can be introduced under the lugs 2022 of the snap tabs 2021 opposite, then a force is applied to the opposite edge of the screen 12 to ensure its complete fitting into its recessed housing 204.
  • the outline 205 of the mounting housing 204 which corresponds to the outline of the screen 12, ensures locking of the latter on the assembly device 20 without the possibility of movement. In situation, this prevents the screen 12 from slipping under the effect of vibrations.
  • the support planes 206 and 209 are located in the same plane and thus designed in such a way that when the screen 12 and the partially transparent element 18 are positioned on the assembly device 20, the contact between them is direct and perfect (that is to say that their facing faces are perfectly applied one against the other).
  • the fixing means 202 and 203 are designed so that they effectively clamp the screen 12 and the partially transparent element 18.
  • a compact sub-assembly is thus obtained formed of the assembly device 20 equipped with the screen 12 and the partially transparent element 18, these last two elements being in tight and secure contact.
  • films, blades or plates can be associated with the screen 12 and with the partially transparent element 18, such as for example polarizing films (reflective polarizers installed on the rear face of the screen 12 on the light source 11 side to recycle the light from the backlight) or infrared films (reflecting infrared films placed on the face of the screen 12 on the side of the optical system 6 to send back by reflection the infrared radiation of the sun which enters inside the head-up display).
  • polarizing films reflective polarizers installed on the rear face of the screen 12 on the light source 11 side to recycle the light from the backlight
  • infrared films reflecting infrared films placed on the face of the screen 12 on the side of the optical system 6 to send back by reflection the infrared radiation of the sun which enters inside the head-up display.
  • the fixing means 202 and 203 will be adapted accordingly, to obtain optimum clamping of the various constituent elements of the stack.
  • the assembly device 20 equipped with the screen 12 and the partially transparent element 18 is fixed to the support structure 22 of the head-up display 2 in the manner illustrated in FIG. 6.
  • the support structure 22 is an integral part of the image generation device 4; and it can be part of the box 8 of the head-up display 2, or be integrated into this box 8.
  • this support structure 22 consists of a heat sink, or is thermally connected to a dedicated heat sink, in order to ensure the heat dissipation function from the center of the screen 12.
  • the support structure 22 consists of a wall of the box 8.
  • This support structure 22 comprises a window 23 delimited by a window rim 24 on which the assembly device 20 is fixed.
  • the periphery of the window 24 includes mounting holes 24a in which the centering studs 2016 of the support frame 201 are fitted. It also includes mounting holes 24b for fixing the support frame 201 by means of screws clamping 25. These fixing holes 24b can be tapped to avoid the use of a locking nut.
  • the clamping screws 25 can be provided long enough to also assemble the reflector 13 from the outside of the box 8.
  • the box 8 (and therefore the support structure 22) is preferably made of a material with a thermal conductivity greater than or equal to 15 W/m.K.
  • the box 8 can be made of metal (aluminum, magnesium, steel, etc.).
  • the active part 12a of the screen 12 is located opposite the window 23.
  • the assembly device 20 thus makes it possible to center the screen 12 and the partially transparent element 18 with respect to their environment; it also makes it possible to assemble the screen 12, the partially transparent element 18 and also any additional films, and to guarantee good contact between them.
  • the assembly device 20 is fixed to the support structure 22 depending on the thermal stress that is to be managed.
  • the support structure 22 comprises an upstream face, oriented on the side of the light source 11, and a downstream face, oriented on the side opposite to this light source 11, then, as illustrated in Figure 7 , the assembly device 20 which supports the screen 12 and the partially transparent element 18, can be fixed on the downstream face of the support structure 22, with the partially transparent element 18 in contact with said support structure 22 and oriented towards the light source 11.
  • the assembly device 20 is fixed inside the box 8, with the partially transparent element 18 placed on the side of the rear face of the screen 12 so that it faces the light source 11.
  • the assembly device 20 which supports the screen 12 and the partially transparent element 18, can be fixed on the upstream face of the support structure 22, with the element partially transparent 18 in contact with said support structure 22 and oriented away from the light source 11.
  • the assembly device 20 is fixed to the outside of the box 8, with the partially transparent element 18 placed on the side of the front face of the screen 12 so that it faces the solar light.

Abstract

The invention relates to an assembly device (20) suitable for assembling a screen (12) comprising a central active part (12a) and a partially transparent element (18), with a contact face of the screen (12) pressed against a contact face of the partially transparent element (18). Furthermore, according to the invention, the assembly device (20) is characterised in that it comprises a support frame (201) provided with a central opening (2011) suitable for positioning the central active part (12a) of the screen (12), which support frame (201) comprises means (202) for fixing the screen (12) and means for fixing the partially transparent element (18).

Description

Description Description
Titre de l'invention : Dispositif d'assemblage adapté pour assembler un écran avec un élément partiellement transparent et afficheur tête haute comprenant un tel dispositif Title of the invention: Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device
[0001] Domaine technique de l'invention [0001] Technical field of the invention
[0002] La présente invention concerne les techniques d'assemblage d'un écran avec un élément partiellement transparent, en particulier pour un afficheur tête haute de véhicule.The present invention relates to techniques for assembling a screen with a partially transparent element, in particular for a vehicle head-up display.
[0003] Elle concerne plus particulièrement un dispositif d'assemblage adapté pour assembler un écran avec un élément partiellement transparent. Elle concerne encore un dispositif de génération d'image, ainsi qu'un afficheur tête haute par exemple pour véhicule automobile, comprenant un tel dispositif d'assemblage. [0003] It relates more particularly to an assembly device suitable for assembling a screen with a partially transparent element. It also relates to an image generation device, as well as a head-up display for example for a motor vehicle, comprising such an assembly device.
[0004] Etat de la technique [0004] State of the art
[0005] Le principe des afficheurs tête haute est de projeter des images, notamment utiles à la conduite, directement dans le champ de vision d'un conducteur. [0005] The principle of head-up displays is to project images, in particular useful for driving, directly into a driver's field of vision.
[0006] Pour cela, les afficheurs tête haute comprennent en général un dispositif de génération d'image adapté à générer des images et un dispositif de projection des images générées adapté à transmettre ces images vers une lame partiellement transparente placée dans le champ de vision du conducteur, de sorte que ce dernier puisse voir ces images et les informations éventuelles qu'elles contiennent sans avoir à détourner le regard.[0006] For this, head-up displays generally comprise an image generation device suitable for generating images and a device for projecting the generated images suitable for transmitting these images to a partially transparent blade placed in the field of vision of the driver, so that he can see these images and any information they contain without having to look away.
[0007] Cette lame partiellement transparente est constituée généralement soit par le pare-brise du véhicule, soit par un combineur dédié, placé entre le pare-brise et les yeux du conducteur. [0007] This partially transparent blade is generally constituted either by the windshield of the vehicle, or by a dedicated combiner, placed between the windshield and the driver's eyes.
[0008] La plupart des dispositifs de génération d'image utilisés aujourd'hui comprennent une source de lumière rétroéclairant un écran (par exemple un écran de type TFT-LCD) adapté à générer les images qui sont ensuite transférées vers un système optique comprenant généralement au moins un miroir d'agrandissement, avant d'atteindre la lame partiellement transparente. [0008] Most of the image generation devices used today comprise a light source backlighting a screen (for example a screen of the TFT-LCD type) adapted to generate the images which are then transferred to an optical system generally comprising at least one magnifying mirror, before reaching the partially transparent blade.
[0009] Très souvent l'afficheur tête haute comprend un boitier (généralement opaque) qui renferme le dispositif de génération d'image et le système optique afin de protéger ces éléments contre d'éventuelles agressions extérieures (poussière, liquides, etc.). [0010] Mais les écrans en question absorbent une partie de la lumière qui les rétroéclairent, ce qui provoque leur échauffement thermique. [0009] Very often, the head-up display comprises a box (generally opaque) which contains the image-generating device and the optical system in order to protect these elements against possible external attacks (dust, liquids, etc.). [0010] But the screens in question absorb part of the light which backlights them, which causes them to heat up.
[0011] Or, une température trop élevée de l'écran est néfaste pour son bon fonctionnement et risque de l'endommager. [0011] However, too high a temperature of the screen is detrimental to its proper functioning and risks damaging it.
[0012] D'autre part, certains types d'afficheurs tête haute, en particuliers ceux ayant des grands angles de vue, et ayant une image virtuelle projetée à très grandes distances, spécialement ceux dont l'affichage se fait sur le pare brise du véhicule équipé, souffrent également d'une charge solaire qui se concentre sur l'écran par effet loupe dû au(x) miroir(s) d'agrandissement. [0012] On the other hand, certain types of head-up displays, in particular those having wide viewing angles, and having a virtual image projected at very long distances, especially those whose display is done on the windshield of the equipped vehicle, also suffer from a solar charge which is concentrated on the screen by the magnifying effect due to the magnifying mirror(s).
[0013] Il convient de noter à ce titre que le taux de concentration du flux solaire est proportionnel au taux d'agrandissement du système optique de l'afficheur tête-haute. En effet, plus le taux d'agrandissement est élevé, plus le système est capable de focaliser la lumière du soleil sur l'écran. [0013] It should be noted in this respect that the concentration rate of the solar flux is proportional to the magnification rate of the optical system of the head-up display. Indeed, the higher the magnification rate, the more the system is able to focus sunlight on the screen.
[0014] L'échauffement correspondant à cette charge solaire est aussi néfaste à l'intégrité de l'écran ou à son bon fonctionnement. [0014] The heating corresponding to this solar charge is also detrimental to the integrity of the screen or to its correct operation.
[0015] Pour chercher à limiter ces problèmes d'échauffement de l'écran, il est connu d'utiliser un élément partiellement transparent, de conductivité thermique supérieure à celle du verre, directement plaqué sur l'écran afin de drainer sa chaleur vers une source froide. De tels éléments partiellement transparents peuvent consister en une plaque de céramique ; par exemple on utilise un mono cristal (genre saphir en particulier). [0015] In order to try to limit these screen heating problems, it is known to use a partially transparent element, of higher thermal conductivity than that of glass, directly plated on the screen in order to drain its heat towards a cold source. Such partially transparent elements can consist of a ceramic plate; for example, a single crystal (sapphire type in particular) is used.
[0016] Cependant, pour des contraintes industrielles, les plaques de céramiques peuvent difficilement être découpées à la même taille que l'écran, ce qui rend l'assemblage des différentes couches relativement difficile. S'ajoute à cela le fait que la plaque de céramique doit avoir toujours un contact parfait avec un dissipateur thermique pour faciliter le drainage de chaleur, ce qui complique encore le montage. [0016] However, for industrial constraints, the ceramic plates can hardly be cut to the same size as the screen, which makes the assembly of the different layers relatively difficult. Added to this is the fact that the ceramic plate must always have perfect contact with a heat sink to facilitate heat drainage, which further complicates assembly.
[0017] De plus, le centrage de l'écran par rapport aux différents éléments optiques environnants (céramique, réflecteur, source de lumière, etc.) n'est pas facile à réaliser. Or, toute déviation de la position de l'écran a un impact sur la forme de l'image virtuelle ; elle peut perdre sa forme rectangulaire et générer un effet de distorsion associé avec une double image connue sous le nom "Ghost Image". [0017] In addition, the centering of the screen with respect to the various surrounding optical elements (ceramic, reflector, light source, etc.) is not easy to achieve. However, any deviation in the position of the screen has an impact on the shape of the virtual image; it may lose its rectangular shape and generate a distortion effect associated with a double image known as "Ghost Image".
[0018] Il s'avère donc intéressant de proposer des solutions pour optimiser l'assemblage entre l'écran et l'élément partiellement transparent associé. [0019] Présentation de l'invention [0018] It is therefore advantageous to propose solutions for optimizing the assembly between the screen and the associated partially transparent element. [0019] Presentation of the invention
[0020] Pour cela, la présente invention propose un dispositif d'assemblage adapté pour assembler un écran comprenant une partie active centrale et un élément partiellement transparent, avec une face de contact dudit écran plaquée contre une face de contact dudit élément partiellement transparent, caractérisé en ce qu'il comprend un cadre support muni d'une ouverture centrale adaptée au positionnement de ladite partie active centrale dudit écran, lequel cadre support comprend des moyens de fixation dudit écran, et des moyens de fixation dudit élément partiellement transparent. For this, the present invention proposes an assembly device suitable for assembling a screen comprising a central active part and a partially transparent element, with a contact face of said screen pressed against a contact face of said partially transparent element, characterized in that it comprises a support frame provided with a central opening suitable for positioning said central active part of said screen, which support frame comprises means for fixing said screen, and means for fixing said partially transparent element.
[0021] Un tel dispositif d'assemblage permet d'assembler de manière simple l'écran et l'élément partiellement transparent, avec un minimum de contraintes sur l'écran. Il facilite également la fixation de l'écran et de l'élément partiellement transparent sur une structure de support (par exemple le boitier de l'afficheur tête haute) et rend le centrage de l'écran plus simple et plus précis. [0021] Such an assembly device makes it possible to assemble the screen and the partially transparent element in a simple manner, with a minimum of constraints on the screen. It also facilitates the fixing of the screen and of the partially transparent element on a support structure (for example the case of the head-up display) and makes the centering of the screen simpler and more precise.
[0022] Selon un mode de réalisation intéressant, ledit cadre support comprend : [0022] According to an advantageous embodiment, said support frame comprises:
[0023] - une face de réception d'écran munie d'un plan d'appui d'écran contre lequel ladite face de contact dudit écran est destinée à venir prendre appui, et [0023] - a screen receiving face provided with a screen support plane against which said contact face of said screen is intended to bear, and
[0024] - une face de réception d'élément partiellement transparent, opposée à ladite face de réception d'écran, laquelle face de réception d'élément partiellement transparent est munie d'un plan d'appui d'élément partiellement transparent, contre lequel ladite face de contact dudit élément partiellement transparent est destinée à venir prendre appui,[0024] - a partially transparent element receiving face, opposite to said screen receiving face, which partially transparent element receiving face is provided with a partially transparent element support plane, against which said contact face of said partially transparent element is intended to bear,
[0025] lequel plan d'appui d'élément partiellement transparent est situé dans le même plan que ledit plan d'appui d'écran. [0025] Which partially transparent element support plane is located in the same plane as said screen support plane.
[0026] Ladite face de réception d'écran peut comprendre lesdits moyens de fixation dudit écran, et ladite face de réception d'élément partiellement transparent peut comprendre lesdits moyens de fixation dudit élément partiellement transparent. [0026] Said screen receiving face may comprise said means for fixing said screen, and said partially transparent element receiving face may comprise said means for fixing said partially transparent element.
[0027] Selon un mode de réalisation ledit plan d'appui d'écran est défini par deux parties de plan en opposition disposées selon un premier axe, et ledit plan d'appui d'élément partiellement transparent est défini par deux parties de plan en opposition disposées selon un second axe perpendiculaire audit premier axe. According to one embodiment, said screen support plane is defined by two opposing plane parts arranged along a first axis, and said partially transparent element support plane is defined by two plane parts in opposition arranged along a second axis perpendicular to said first axis.
[0028] Selon encore une autre particularité, ledit cadre support peut comprendre (a) un logement d'encastrement pour ledit élément partiellement transparent, dont le contour correspond, au jeu près, au contour dudit élément partiellement transparent, et (b) un logement d'encastrement pour ledit écran, dont le contour correspond, au jeu près, au contour dudit écran. [0028]According to yet another feature, said support frame may comprise (a) a recessed housing for said partially transparent element, the contour of which corresponds, except for clearance, to the contour of said partially transparent element, and (b) a housing embedding for said screen, the outline of which corresponds, except for clearance, to the outline of said screen.
[0029] Lesdits moyens de fixation dudit écran, et lesdits moyens de fixation dudit élément partiellement transparent, peuvent consister en des moyens d'emboitage élastique du type à languette d'encliquetage munie d'un ergot de verrouillage. [0029] Said means for fixing said screen, and said means for fixing said partially transparent element, may consist of elastic interlocking means of the type with a latching tab provided with a locking lug.
[0030] Le cadre support peut comprendre au moins deux tenons de centrage ménagés en saillie à partir de ladite face de réception d'élément partiellement transparent, lesquels tenons de centrage sont adaptés à venir coopérer avec des orifices d'encastrement ménagés sur une structure de support. [0030] The support frame may comprise at least two centering studs provided projecting from said partially transparent element receiving face, which centering studs are adapted to cooperate with mounting holes provided on a structure of support.
[0031] D'autre part, le cadre support peut également comprendre au moins deux orifices de fixation adaptés chacun au passage d'une vis de serrage pour sa fixation sur une structure de support. [0031] On the other hand, the support frame may also comprise at least two fixing holes, each adapted for the passage of a clamping screw for fixing it to a support structure.
[0032] L'invention propose également un dispositif de génération d'image comprenant une source de lumière produisant un faisceau lumineux et un écran traversé par le faisceau lumineux et conçu pour modifier le faisceau lumineux de manière à former une image, lequel dispositif de génération d'image comprend encore un élément partiellement transparent traversé par le faisceau lumineux et agencé pour limiter réchauffement dudit écran, et lequel dispositif de génération d'image comprend encore une structure de support munie d'une fenêtre délimitée par un pourtour de fenêtre, sur lequel pourtour de fenêtre est fixé un dispositif d'assemblage tel que défini ci-dessus, lequel dispositif d'assemblage supporte ledit écran et ledit élément partiellement transparent.[0032] The invention also proposes an image generating device comprising a light source producing a light beam and a screen through which the light beam passes and designed to modify the light beam so as to form an image, which generating device image device further comprises a partially transparent element through which the light beam passes and arranged to limit heating of said screen, and which image generating device further comprises a support structure provided with a window delimited by a window rim, on which around the window is fixed an assembly device as defined above, which assembly device supports said screen and said partially transparent element.
[0033] La structure de support peut être munie d'une fenêtre délimitée par un pourtour de fenêtre comprenant des orifices d'encastrement dans lesquels viennent s'encastrer les tenons de centrage dudit cadre support. [0033] The support structure may be provided with a window delimited by a window rim comprising mounting holes in which the centering tenons of said support frame fit.
[0034] La structure de support peut aussi être munie d'une fenêtre délimitée par un pourtour de fenêtre comprenant des orifices de fixation pour la fixation dudit cadre support au moyen de vis de serrage. [0034] The support structure can also be provided with a window delimited by a window periphery comprising fixing holes for fixing said support frame by means of clamping screws.
[0035] Selon encore une autre particularité, ladite structure de support peut consister en un dissipateur thermique, ou est relié thermiquement à un dissipateur thermique.According to yet another feature, said support structure may consist of a heat sink, or is thermally connected to a heat sink.
[0036] Dans un mode de réalisation, ladite structure de support comprend une face amont, orientée du côté de ladite source de lumière, et une face aval, orientée du côté opposé à ladite source de lumière, ledit dispositif d'assemblage qui supporte ledit écran et ledit élément partiellement transparent étant fixé sur ladite face aval de ladite structure de support, avec ledit élément partiellement transparent orienté en direction de ladite source de lumière. In one embodiment, said support structure comprises an upstream face, oriented on the side of said light source, and a downstream face, oriented on the opposite side to said light source, said assembly device which supports said screen and said partially transparent element being fixed on said downstream face of said support structure, with said partially transparent element oriented in the direction of said light source.
[0037] Dans un autre mode de réalisation, ladite structure de support comprend une face amont, orientée du côté de ladite source de lumière, et une face aval, orientée du côté opposé à ladite source de lumière, ledit dispositif d'assemblage qui supporte ledit écran et ledit élément partiellement transparent étant fixé sur ladite face amont de ladite structure de support, avec ledit élément partiellement transparent orienté dans la direction opposée à ladite source de lumière. In another embodiment, said support structure comprises an upstream face, oriented on the side of said light source, and a downstream face, oriented on the side opposite to said light source, said assembly device which supports said screen and said partially transparent element being attached to said upstream face of said support structure, with said partially transparent element oriented in the opposite direction to said light source.
[0038] L'invention propose encore un afficheur tête haute, par exemple destiné à équiper un véhicule automobile, comprenant un dispositif de génération d'image tel que proposé ci- dessus, et un système optique adapté à transmettre en direction d'une lame partiellement transparente les images générées par ledit dispositif de génération d'image. [0038] The invention also proposes a head-up display, for example intended to equip a motor vehicle, comprising an image generation device as proposed above, and an optical system adapted to transmit in the direction of a blade partially transparent images generated by said image generation device.
[0039] Dans un mode de réalisation, l'afficheur tête haute comprend un boitier de protection, lequel boitier de protection comprend ladite structure de support munie d'une fenêtre délimitée par un pourtour de fenêtre, sur lequel pourtour de fenêtre est fixé ledit dispositif d'assemblage supportant ledit écran et ledit élément partiellement transparent.In one embodiment, the head-up display comprises a protective casing, which protective casing comprises said support structure provided with a window delimited by a window surround, on which window surround is fixed said device assembly supporting said screen and said partially transparent element.
[0040] Bien entendu, les différentes caractéristiques, variantes et formes de réalisation de l'invention peuvent être associées les unes avec les autres selon diverses combinaisons dans la mesure où elles ne sont pas incompatibles ou exclusives les unes des autres. Of course, the different characteristics, variants and embodiments of the invention can be associated with each other in various combinations insofar as they are not incompatible or exclusive of each other.
[0041] Description détaillée de l'invention [0041] Detailed description of the invention
[0042] De plus, diverses autres caractéristiques de l'invention ressortent de la description annexée effectuée en référence aux dessins qui illustrent des formes, non limitatives, de réalisation de l'invention et où : In addition, various other characteristics of the invention emerge from the appended description made with reference to the drawings which illustrate non-limiting forms of embodiment of the invention and where:
[0043] Fig. 1] représente schématiquement les principaux éléments d'un afficheur tête haute conforme à l'invention ; [0043] Fig. 1] schematically represents the main elements of a head-up display according to the invention;
[0044] [Fig. 2] est une vue schématique en perspective d'un mode de réalisation possible du dispositif d'assemblage selon l'invention, vu du côté de sa face destinée à recevoir l'écran ; [0044] [Fig. 2] is a schematic perspective view of a possible embodiment of the assembly device according to the invention, seen from the side of its face intended to receive the screen;
[0045] [Fig. 3] est une vue schématique en perspective du dispositif d'assemblage illustré sur la figure 2, vu du côté de sa face destinée à recevoir l'élément partiellement transparent ; [0046] [Fig. 4] est une vue schématique en perspective du dispositif d'assemblage illustré sur les figures 2 et 3, sur lequel sont assemblés l'élément partiellement transparent et l'écran, vu ici du côté du montage de l'élément partiellement transparent ; [0045] [Fig. 3] is a schematic perspective view of the assembly device illustrated in FIG. 2, seen from the side of its face intended to receive the partially transparent element; [0046] [Fig. 4] is a schematic perspective view of the assembly device illustrated in FIGS. 2 and 3, on which the partially transparent element and the screen are assembled, seen here from the side where the partially transparent element is mounted;
[0047] [Fig. 5] est une vue schématique en perspective du dispositif d'assemblage équipé, tel qu'illustré sur la figure 4, vu ici du côté du montage de l'écran ; [0047] [Fig. 5] is a schematic perspective view of the equipped assembly device, as illustrated in FIG. 4, seen here from the screen mounting side;
[0048] [Fig. 6] est une vue schématique en perspective et en coupe qui illustre le montage du dispositif d'assemblage équipé de l'écran et de l'élément partiellement transparent, sur une structure de support ; [0048] [Fig. 6] is a schematic view in perspective and in section which illustrates the assembly of the assembly device equipped with the screen and the partially transparent element, on a support structure;
[0049] [Fig. 7] présente schématiquement une possibilité de montage du dispositif d'assemblage équipé de l'écran et de l'élément partiellement transparent, sur le boitier de protection d'un afficheur tête haute ; [0049] [Fig. 7] schematically presents a possibility of mounting the assembly device equipped with the screen and the partially transparent element, on the protective case of a head-up display;
[0050] [Fig. 8] présente schématiquement une autre possibilité de montage du dispositif d'assemblage équipé de l'écran et de l'élément partiellement transparent, sur le boitier de protection d'un afficheur tête haute. [0050] [Fig. 8] schematically presents another possibility of mounting the assembly device equipped with the screen and the partially transparent element, on the protective case of a head-up display.
[0051] L'afficheur tête haute 2 représenté sur la figure 1 comprend un dispositif de génération d'image 4, qui génère un faisceau lumineux amont Fi, et un système optique 6, qui reçoit en entrée ce faisceau lumineux amont Fi et projette en sortie un faisceau lumineux aval Ff en direction d'une lame partiellement transparente 7, ici le pare-brise d'un véhicule (typiquement un véhicule automobile) équipé de l'afficheur tête haute 2. The head-up display 2 represented in FIG. 1 comprises an image-generating device 4, which generates an upstream light beam Fi, and an optical system 6, which receives this upstream light beam Fi as input and projects outputs a downstream light beam Ff in the direction of a partially transparent blade 7, here the windshield of a vehicle (typically a motor vehicle) fitted with the head-up display 2.
[0052] Le faisceau lumineux aval Ff est ainsi incident sur la lame partiellement transparente 7 et partiellement réfléchi sur cette lame partiellement transparente 7 en direction des yeux du conducteur (schématiquement représentés par la référence O sur la figure 1).The downstream light beam Ff is thus incident on the partially transparent blade 7 and partially reflected on this partially transparent blade 7 in the direction of the driver's eyes (schematically represented by the reference O in FIG. 1).
[0053] Le faisceau lumineux (généré par le dispositif de génération d'image 4 et transmis comme il vient d'être indiqué jusqu'aux yeux O du conducteur) représente une image à afficher, que le conducteur verra ainsi au-delà de la lame partiellement transparente 7, dans l'environnement (extérieur au véhicule) lui faisant face, cela sans avoir à détourner le regard. On a représenté sous la référence I l'image virtuelle ainsi vue par le conducteur. The light beam (generated by the image generation device 4 and transmitted as just indicated to the driver's eyes O) represents an image to be displayed, which the driver will thus see beyond the partially transparent blade 7, in the environment (outside the vehicle) facing it, without having to look away. The virtual image thus seen by the driver has been represented under the reference I.
[0054] Le dispositif de génération d'image 4 comprend une source de lumière 11 et un écran 12. Le dispositif de génération d'image 4 comprend encore ici, entre la source de lumière 11 et l'écran 12, un réflecteur 13 et un diffuseur 14. The image generating device 4 comprises a light source 11 and a screen 12. The image generating device 4 again comprises here, between the light source 11 and the screen 12, a reflector 13 and a diffuser 14.
[0055] Le système optique 6 est formé ici de deux miroirs 15 etl6. [0056] Le système optique 6 utilisé ici comprend en effet un premier miroir (ici un miroir plan) 15 disposé face au dispositif de génération d'image 4 et un second miroir 16 (ici un miroir courbe, avec une forme définie par exemple pour obtenir l'image virtuelle I nette). The optical system 6 is formed here of two mirrors 15 etl6. The optical system 6 used here indeed comprises a first mirror (here a plane mirror) 15 placed opposite the image generating device 4 and a second mirror 16 (here a curved mirror, with a shape defined for example to obtain the sharp virtual image I).
[0057] En variante, le système optique 6 peut comprendre un seul miroir, ou une pluralité d'autres types de miroirs et/ou autres éléments optiques tels qu'une ou plusieurs lentilles par exemple. As a variant, the optical system 6 can comprise a single mirror, or a plurality of other types of mirrors and/or other optical elements such as one or more lenses for example.
[0058] Le faisceau lumineux amont Fi est ainsi réfléchi sur le premier miroir 15 en direction du second miroir 16, puis sur le second miroir 16 en direction de la lame partiellement transparente 7, comme bien visible en figure 1. The upstream light beam Fi is thus reflected on the first mirror 15 in the direction of the second mirror 16, then on the second mirror 16 in the direction of the partially transparent blade 7, as clearly visible in Figure 1.
[0059] L'afficheur tête haute 2 comprend également un boîtier 8 (généralement opaque) qui renferme le dispositif de génération d'image 4 et le système optique 6, afin notamment de protéger ces éléments contre d'éventuelles agressions extérieures (poussière, liquides, etc.). The head-up display 2 also comprises a casing 8 (generally opaque) which encloses the image-generating device 4 and the optical system 6, in particular in order to protect these elements against possible external attacks (dust, liquids , etc.).
[0060] Le boîtier 8 comprend une ouverture 10 à travers laquelle passe le faisceau lumineux projeté par le système optique 6 en direction de la lame partiellement transparente 7 (c'est-à-dire ici le faisceau lumineux réfléchi par le second miroir 16). The housing 8 comprises an opening 10 through which passes the light beam projected by the optical system 6 in the direction of the partially transparent blade 7 (that is to say here the light beam reflected by the second mirror 16) .
[0061] L'ouverture 10 du boîtier 8 est fermée par une fenêtre 17 (parfois dénommée « cover window ») formée par exemple d'une feuille de matière plastique de type polycarbonate d'épaisseur comprise entre 0,25mm et 0,75mm. The opening 10 of the housing 8 is closed by a window 17 (sometimes called "cover window") formed for example of a sheet of plastic material of the polycarbonate type with a thickness of between 0.25 mm and 0.75 mm.
[0062] Selon une variante de réalisation, la lame partiellement transparente 7 peut être un combineur dédié à l'afficheur tête haute 2, placé entre le pare-brise du véhicule et les yeux du conducteur, sur le trajet du faisceau lumineux aval Ff. According to a variant embodiment, the partially transparent blade 7 can be a combiner dedicated to the head-up display 2, placed between the windshield of the vehicle and the eyes of the driver, on the path of the downstream light beam Ff.
[0063] La source de lumière 11 consiste en une ou plusieurs diodes électroluminescentes (ou LED pour « Light Emitting Diode »). The light source 11 consists of one or more light-emitting diodes (or LEDs for "Light Emitting Diode").
[0064] Cette source de lumière 11 rétroéclaire l'écran 12 et la transmission de la lumière de la source de lumière 11 vers l'écran 12 a été représenté par la flèche d'orientation L sur la figure 1. This light source 11 backlights the screen 12 and the transmission of light from the light source 11 to the screen 12 has been represented by the orientation arrow L in Figure 1.
[0065] L'écran 12 est ici un écran à cristaux liquides (ou LCD pour « Liquid Crystal Display »), par exemple du type à transistors en couche mince (ou TFT pour « Thin Film Transistor »). [0066] Un tel écran 12 LCD comprend un assemblage d'éléments (ou lames) en forme de plaques, comprenant notamment, dans le sens du trajet de la lumière L : un polariseur d'entrée, une matrice de cristaux liquides et un polariseur de sortie. The screen 12 here is a liquid crystal display (or LCD for "Liquid Crystal Display"), for example of the type with thin film transistors (or TFT for "Thin Film Transistor"). Such an LCD screen 12 comprises an assembly of elements (or blades) in the form of plates, comprising in particular, in the direction of the path of the light L: an input polarizer, a matrix of liquid crystals and a polarizer Release.
[0067] Dans un tel écran 12, avec le polariseur de sortie au plus près de la matrice de cristaux liquides, l'image est très nette et optimisée en termes de contraste. In such a screen 12, with the output polarizer as close as possible to the liquid crystal matrix, the image is very sharp and optimized in terms of contrast.
[0068] Le polariseur d'entrée et le polariseur de sortie de l'écran 12 peuvent être des filtres polariseurs par absorption (d'où un échauffement important au niveau de ces polariseurs). The input polarizer and the output polarizer of the screen 12 can be absorption polarizer filters (hence significant heating at the level of these polarizers).
[0069] Le polariseur d'entrée et le polariseur de sortie de l'écran 12 ont respectivement un premier axe et un second axe perpendiculaires entre eux (dans le cadre de la technologie dite « normalement éteint », ou NB pour « normally black »). On rappelle que l'axe d'un polariseur est la direction de polarisation rectiligne du faisceau lumineux après passage à travers le polariseur. The input polarizer and the output polarizer of the screen 12 respectively have a first axis and a second axis perpendicular to each other (in the context of the so-called "normally off" technology, or NB for "normally black" ). It is recalled that the axis of a polarizer is the rectilinear polarization direction of the light beam after passing through the polarizer.
[0070] Ainsi, si aucun élément de la matrice de cristaux liquides n'est actif, le faisceau lumineux entre le polariseur d'entrée et le polariseur de sortie sera polarisé selon le premier axe (axe du polariseur d'entrée) et aucune lumière ne sera donc émise en sortie du polariseur de sortie. Thus, if no element of the liquid crystal matrix is active, the light beam between the input polarizer and the output polarizer will be polarized along the first axis (axis of the input polarizer) and no light will therefore be emitted at the output of the output polarizer.
[0071] Par une activation adaptée des éléments de la matrice de cristaux liquides (au moyen d'un module de commande non représenté), la polarisation de certaines parties du faisceau lumineux est modifiée au niveau de la matrice de cristaux liquides de sorte que la lumière est émise en sortie du polariseur de sortie au niveau des régions correspondant auxdites parties du faisceau lumineux. By suitable activation of the elements of the liquid crystal matrix (by means of a control module not shown), the polarization of certain parts of the light beam is modified at the level of the liquid crystal matrix so that the light is emitted at the output of the output polarizer at the regions corresponding to said portions of the light beam.
[0072] De manière classique, ces lames ou plaques constituant le polariseur d'entrée, la matrice de cristaux liquides et le polariseur de sortie, peuvent être associées à d'autres lames ou plaques, telles que des plaque(s) de verre, matrice d'éléments colorés ou autres.[0072] Conventionally, these blades or plates constituting the input polarizer, the liquid crystal matrix and the output polarizer, can be associated with other blades or plates, such as glass plate(s), matrix of colored or other elements.
[0073] L'écran 12 constitué de ses différentes lames ou plaques associées se présente sous la forme d'une plaque rectangulaire ayant une longueur qui peut être supérieure à 40 mm, une largeur qui peut être supérieure à 30 mm, et une épaisseur qui peut être supérieure à 1mm. Cette plaque rectangulaire comporte deux faces planes opposées. The screen 12 made up of its various blades or associated plates is in the form of a rectangular plate having a length which may be greater than 40 mm, a width which may be greater than 30 mm, and a thickness which may be greater than 1mm. This rectangular plate has two opposite flat faces.
[0074] L'écran 12 comprend une partie active centrale 12a correspondant au positionnement de la matrice de cristaux liquides, bordée par un entourage périphérique 12b. Il comprend encore une connectique (encore dénommée « nappe connecteur LCD » ou « TFT flex »), réalisée ici sous forme de câbles électriques en nappe et non représentée sur la figure 1, adaptée pour apporter à l'écran 12 son alimentation et ses signaux de commande. The screen 12 comprises a central active part 12a corresponding to the positioning of the liquid crystal matrix, bordered by a peripheral surround 12b. It also includes connectors (also called "LCD connector cable" or "TFT flex"), produced here in the form of electrical cables in a ribbon and not shown in FIG. 1, adapted to provide the screen 12 with its power supply and its control signals.
[0075] On a encore représenté sur la figure 1 le flux lumineux Fs provenant du soleil (dénommé ci-après « flux solaire Fs »), susceptible d'entrer dans le boitier 8 et de venir se concentrer sur l'écran 12 par effet loupe dû aux miroirs 15, 16 du système optique 6, et donc risquant de provoquer un échauffement de l'écran 12. FIG. 1 also shows the luminous flux Fs coming from the sun (hereinafter referred to as "solar flux Fs"), capable of entering the box 8 and coming to be concentrated on the screen 12 by effect magnifying glass due to the mirrors 15, 16 of the optical system 6, and therefore risking causing the screen 12 to overheat.
[0076] Pour éviter ou tout au moins limiter réchauffement de l'écran 12 dû à la source de lumière 11 et/ou au flux solaire Fs, le dispositif de génération d'image 4 de l'afficheur tête haute 2 comprend un élément partiellement transparent 18 associé audit écran 12. To avoid or at least limit heating of the screen 12 due to the light source 11 and/or to the solar flux Fs, the image generation device 4 of the head-up display 2 comprises a partially transparency 18 associated with said screen 12.
[0077] Plus précisément, cet élément partiellement transparent 18 se présente sous la forme d'une plaque dont l'une des faces est placée en contact avec une face de l'écran 12, cet élément partiellement transparent 18 étant ainsi adapté pour limiter, voire éviter, réchauffement dudit écran 12, et/ou pour évacuer au moins une partie de la chaleur générée au niveau dudit écran 12. More specifically, this partially transparent element 18 is in the form of a plate, one of the faces of which is placed in contact with one face of the screen 12, this partially transparent element 18 thus being adapted to limit, or even avoid, heating of said screen 12, and/or to evacuate at least part of the heat generated at the level of said screen 12.
[0078] L'élément partiellement transparent 18 utilisé est de préférence une céramique transparente, par exemple un mono cristal comme le saphir. The partially transparent element 18 used is preferably a transparent ceramic, for example a single crystal such as sapphire.
[0079] On peut utiliser une céramique transparente frittée ou non, par exemple à base d'oxyde simple (MgO, AI2O3, ZrÛ2, Y2O3, SC2O3 ou LU2O3), ou à base d'oxyde complexe (Y3AI5O12, MgAl2O4 ou ZNAI2O4, voire Lu2TiO3, Lu2Zr2O7, LusNbO?, LaGdZr2O7, Lag,33SisO26, Sr2Y8(SiO4)gO2, SrsALOg, BaALO?) ou encore à base non oxyde (AION ou AIN). One can use a sintered transparent ceramic or not, for example based on simple oxide (MgO, Al2O3, ZrO2, Y2O3, SC2O3 or LU2O3), or based on complex oxide (Y3Al5O12, MgAl2O4 or ZNAI2O4, even Lu 2 TiO3, Lu2Zr2O 7 , LusNbO?, LaGdZr 2 O 7 , Lag,33SisO26, Sr2Y8(SiO4)gO2, SrsALOg, BaALO?) or with a non-oxide base (AION or AIN).
[0080] Cet élément partiellement transparent 18 est utilisé sous forme de plaque ou de lame comportant deux faces planes opposées et dont l'épaisseur peut être comprise entre 0,5 et 3 mm (par exemple comprise entre 0,8 et 1,2 mm). Cette plaque ou lame peut avoir une forme rectangulaire dont la longueur peut être supérieure ou égale à 25 mm, et dont la largeur peut être également supérieure ou égale à 25 mm. [0080] This partially transparent element 18 is used in the form of a plate or blade having two opposite flat faces and the thickness of which can be between 0.5 and 3 mm (for example between 0.8 and 1.2 mm ). This plate or blade may have a rectangular shape, the length of which may be greater than or equal to 25 mm, and the width of which may also be greater than or equal to 25 mm.
[0081] D'une manière générale, l'élément partiellement transparent 18 est choisi parmi les matériaux ayant une conductivité thermique supérieure à 5W/mK et de préférence supérieure à 40 W/mK, pour obtenir une bonne évacuation de la chaleur. In general, the partially transparent element 18 is chosen from materials having a thermal conductivity greater than 5 W/mK and preferably greater than 40 W/mK, in order to obtain good heat dissipation.
[0082] Le caractère partiellement transparent de l'élément partiellement transparent 18 (dont la transmittance est avantageusement comprise entre 80 et 90%) lui permet d'absorber une partie de la lumière du soleil (de l'ordre de 5% à 15% de la lumière du soleil dans le spectre visible), protégeant ainsi l'écran 12. [0083] L'élément partiellement transparent 18 peut aussi être choisi absorbant dans l'infra rouge pour contribuer à diminuer la charge thermique dans cette région du spectre lumineux solaire (par exemple le saphir permet de filtrer les infra rouges au-delà de 5pm). The partially transparent character of the partially transparent element 18 (whose transmittance is advantageously between 80 and 90%) allows it to absorb part of the sunlight (of the order of 5% to 15% sunlight in the visible spectrum), thus protecting the screen 12. The partially transparent element 18 can also be chosen to absorb in the infrared to contribute to reducing the thermal load in this region of the solar light spectrum (for example the sapphire makes it possible to filter the infrared beyond 5 pm) .
[0084] Dans l'afficheur tête haute 2 illustré sur la figure 1, l'écran 12 et l'élément partiellement transparent 18 sont assemblés par un dispositif d'assemblage 20, avec une face de contact dudit écran 12 plaquée contre une face de contact dudit élément partiellement transparent 18 , et cet afficheur tête haute 2 comprend une structure de support 22 sur laquelle est fixé ledit dispositif d'assemblage 20. In the head-up display 2 shown in Figure 1, the screen 12 and the partially transparent element 18 are assembled by an assembly device 20, with a contact face of said screen 12 pressed against a face of contact with said partially transparent element 18, and this head-up display 2 comprises a support structure 22 on which said assembly device 20 is fixed.
[0085] La structure de support 22 fait partie intégrante du dispositif de génération d'image 4. Elle peut faire partie du boitier 8 de l'afficheur tête haute 2, ou être intégrée dans ce boitier 8. The support structure 22 is an integral part of the image generation device 4. It can be part of the box 8 of the head-up display 2, or be integrated into this box 8.
[0086] Un mode de réalisation possible du dispositif d'assemblage 20 est illustré sur les figures 2 à 5. Les figures 2 et 3 montrent les deux faces du dispositif d'assemblage 20 non équipées de l'écran 12 et de l'élément partiellement transparent 18 ; de leur côté, les figures 4 et 5 montrent les deux faces du dispositif d'assemblage 20 équipées l'une de l'écran 12 et l'autre de l'élément partiellement transparent 18. A possible embodiment of the assembly device 20 is illustrated in Figures 2 to 5. Figures 2 and 3 show the two faces of the assembly device 20 not equipped with the screen 12 and the element partially transparent 18; for their part, FIGS. 4 and 5 show the two faces of the assembly device 20 equipped, one with the screen 12 and the other with the partially transparent element 18.
[0087] Le dispositif d'assemblage 20 correspondant comprend un cadre support 201, ainsi que des moyens de fixation 202 pour la fixation de l'écran 12, et des moyens de fixation 203 pour la fixation de l'élément partiellement transparent 18. The corresponding assembly device 20 comprises a support frame 201, as well as fixing means 202 for fixing the screen 12, and fixing means 203 for fixing the partially transparent element 18.
[0088] Le cadre support 201 est de forme générale plane et il est muni d'une ouverture centrale 2011, ici rectangulaire, qui est adaptée au positionnement de la partie active centrale 12a de l'écran 12. [0088] The support frame 201 is of generally planar shape and it is provided with a central opening 2011, here rectangular, which is adapted to the positioning of the central active part 12a of the screen 12.
[0089] Ce cadre support 201 est délimité par une bordure extérieure 2012, une bordure intérieure 2013 (qui définit l'ouverture centrale 2011), une face de réception d'écran 2014 et une face de réception d'élément partiellement transparent 2015 (située à l'opposé de la face de réception d'écran 2014). This support frame 201 is delimited by an outer border 2012, an inner border 2013 (which defines the central opening 2011), a screen receiving face 2014 and a partially transparent element receiving face 2015 (located opposite the screen receiving face 2014).
[0090] La face de réception d'écran 2014 du cadre support 201 (figure 2) comprend un logement d'encastrement 204 agencé pour recevoir l'écran 12. The screen receiving face 2014 of the support frame 201 (FIG. 2) comprises a mounting housing 204 arranged to receive the screen 12.
[0091] Le logement d'encastrement 204 pour l'écran 12 est délimité par un contour 205 et par un plan d'appui d'écran 206 contre lequel une face de contact dudit écran 12 est destinée à venir prendre appui. [0092] Le contour 205 du logement d'encastrement 204 correspond, au jeu près, au contour de l'écran 12. Ici, ces deux contours ont une forme générale rectangulaire. The recessed housing 204 for the screen 12 is delimited by an outline 205 and by a screen support plane 206 against which a contact face of said screen 12 is intended to bear. [0092] The outline 205 of the mounting housing 204 corresponds, except for clearance, to the outline of the screen 12. Here, these two outlines have a generally rectangular shape.
[0093] Le plan d'appui d'écran 206 est défini par deux parties de plan 206a et 206b, en opposition, disposées selon un premier axe X de part et d'autre de l'ouverture centrale 2011. Dans le mode de réalisation illustré, les deux parties de plan 206a et 206b s'étendent le long des deux grands côtés de l'ouverture centrale 2011 rectangulaire. The screen support plane 206 is defined by two plane parts 206a and 206b, in opposition, arranged along a first axis X on either side of the central opening 2011. In the embodiment illustrated, the two plan parts 206a and 206b extend along the two long sides of the rectangular central opening 2011.
[0094] La face de réception d'écran 2014 comprend les moyens de fixation 202 précités de l'écran 12. Ces moyens de fixation 202 de l'écran 12 consistent en des moyens d'emboitage élastique du type à languette d'encliquetage 2021 munie d'un ergot de verrouillage 2022. The screen-receiving face 2014 comprises the aforementioned fixing means 202 of the screen 12. These fixing means 202 of the screen 12 consist of elastic interlocking means of the snap-in tongue type 2021 fitted with a locking pin 2022.
[0095] Ces languettes d'encliquetage 2021 sont ici au nombre de 4 réparties sur le pourtour du contour 205 du logement d'encastrement 204. Elles sont chacune bordées par deux fentes latérales 2023 ménagées dans le cadre support 201 permettant d'améliorer leur élasticité. These snap tabs 2021 are here 4 in number distributed around the periphery of the contour 205 of the mounting housing 204. They are each bordered by two lateral slots 2023 formed in the support frame 201 allowing their elasticity to be improved. .
[0096] Au niveau de l'un des côtés du cadre support 201 on remarque la présence d'une échancrure 207 adaptée au passage de la connectique de l'écran 12. Cette échancrure 207 prolonge la partie de plan 206b du plan d'appui d'écran 206 jusqu'à la bordure extérieure 2012 du cadre support 201. At one of the sides of the support frame 201 we note the presence of a notch 207 adapted to the passage of the connectors of the screen 12. This notch 207 extends the plane part 206b of the support plane screen 206 to the outer edge 2012 of the support frame 201.
[0097] La face de réception d'élément partiellement transparent 2015 du cadre support 201 (figure 3) comprend un logement d'encastrement 208 agencé pour recevoir l'élément partiellement transparent 18. The partially transparent element receiving face 2015 of the support frame 201 (FIG. 3) comprises a mounting housing 208 arranged to receive the partially transparent element 18.
[0098] Le logement d'encastrement 208 pour l'élément partiellement transparent 18 est délimité par un contour 208a et par un plan d'appui d'élément partiellement transparent 209 contre lequel une face de contact dudit élément partiellement transparent 18 est destinée à venir prendre appui. The embedding housing 208 for the partially transparent element 18 is delimited by an outline 208a and by a partially transparent element support plane 209 against which a contact face of said partially transparent element 18 is intended to come take support.
[0099] Le contour 208a du logement d'encastrement 208 correspond, au jeu près, au contour de l'élément partiellement transparent 18. Ici, ces deux contours ont une forme générale rectangulaire. The outline 208a of the mounting housing 208 corresponds, except for clearance, to the outline of the partially transparent element 18. Here, these two outlines have a generally rectangular shape.
[0100] Le plan d'appui d'élément partiellement transparent 209 est défini par deux parties de plan 209a et 209b, en opposition, disposées selon un second axe Y de part et d'autre de l'ouverture centrale 2011. Dans le mode de réalisation illustré, les deux parties de plan 209a et 209b s'étendent le long des deux petits côtés de l'ouverture centrale 2011 rectangulaire. The partially transparent element support plane 209 is defined by two plane parts 209a and 209b, in opposition, arranged along a second axis Y on either side of the central opening 2011. In the mode illustrated embodiment, the two plan parts 209a and 209b extend along the two short sides of the rectangular central opening 2011.
[0101] La face de réception d'élément partiellement transparent 2015 comprend les moyens de fixation 203 précités de l'élément partiellement transparent 18. Ces moyens de fixation 203 de l'élément partiellement transparent 18 sont similaires aux moyens de fixation 202 de l'écran 12. Ils consistent en des moyens d'emboitage élastique du type à languette d'encliquetage 2031 munie d'un ergot de verrouillage 2032. The partially transparent element receiving face 2015 comprises the aforementioned means 203 for fixing the partially transparent element 18. These fixing means 203 for the partially transparent element 18 are similar to the fixing means 202 of the screen 12. They consist of elastic interlocking means of the snap-in tongue type 2031 provided with a locking lug 2032.
[0102] Ces languettes d'encliquetage 2031 sont ici au nombre de 2 disposées en vis-à-vis en bordure des parties de plan 209a et 209b. En l'occurrence, elles sont placées approximativement sur l'axe médian de la longueur de l'ouverture centrale 2011, c'est-à- dire centrées ou à peu près centrées sur la largeur des petits côtés de cette ouverture centrale 2011. These snap tabs 2031 are here 2 in number arranged vis-à-vis the edge of the plan parts 209a and 209b. In this case, they are placed approximately on the median axis of the length of the central opening 2011, that is to say centered or approximately centered on the width of the short sides of this central opening 2011.
[0103] Le plan d'appui d'élément partiellement transparent 209 est situé dans le même plan que le plan d'appui d'écran 206. The partially transparent element support plane 209 is located in the same plane as the screen support plane 206.
[0104] La dimension du logement d'encastrement 204 de l'écran 12 et la dimension du logement d'encastrement 208 de l'élément partiellement transparent 18 sont indépendantes l'une de l'autre et respectivement adaptées à la dimension de l'écran 12 et à celle de l'élément partiellement transparent 18. La surface de la plaque d'élément partiellement transparent 18 est bien supérieure à l'ouverture centrale 2011 du cadre support 201. [0104] The dimension of the recessed housing 204 of the screen 12 and the dimension of the recessed housing 208 of the partially transparent element 18 are independent of each other and respectively adapted to the dimension of the screen 12 and that of the partially transparent element 18. The surface of the partially transparent element plate 18 is much greater than the central opening 2011 of the support frame 201.
[0105] Le cadre support 201 permet donc la fixation de l'écran 12 sur sa face de réception d'écran 2014, et la fixation de l'élément partiellement transparent 18 sur sa face de réception d'élément partiellement transparent 2015, avec une face de contact dudit écran 12 plaquée contre une face de contact de l'élément partiellement transparent 18. The support frame 201 therefore allows the fixing of the screen 12 on its screen receiving face 2014, and the fixing of the partially transparent element 18 on its partially transparent element receiving face 2015, with a contact face of said screen 12 pressed against a contact face of partially transparent element 18.
[0106] La face de l'élément partiellement transparent 18 destinée à être en contact avec une face de l'écran 12 peut être l'une ou l'autre de ses deux faces planes opposées.The face of the partially transparent element 18 intended to be in contact with one face of the screen 12 can be one or the other of its two opposite flat faces.
[0107] Egalement, la face de l'écran 12 destinée à être en contact avec une face de l'élément partiellement transparent 18 peut être l'une ou l'autre de ses deux faces opposées. Also, the face of the screen 12 intended to be in contact with a face of the partially transparent element 18 can be one or the other of its two opposite faces.
[0108] Dans tous les cas, les faces de contact de l'écran 12 et de l'élément partiellement transparent 18 sont celles qui viennent en appui sur les parties de plan 206a et 206b, d'une part, et sur les parties de plan 209a et 209b, d'autre part. [0108] In all cases, the contact faces of the screen 12 and of the partially transparent element 18 are those which bear against the plane parts 206a and 206b, on the one hand, and on the parts of plan 209a and 209b, on the other hand.
[0109] Le cadre support 201 comprend encore des tenons de centrage 2016, ménagés en saillie à partir de la face de réception d'élément partiellement transparent 2015, qui sont adaptés à venir coopérer avec des orifices d'encastrement ménagés sur la structure de support 22 de l'afficheur tête haute 2. [0109] The support frame 201 further comprises centering studs 2016, projecting from the receiving face of the partially transparent element 2015, which are adapted to cooperate with recessed holes provided on the support structure 22 of the head-up display 2.
[0110] Ces tenons de centrage 2016 sont ici au nombre de deux, mais ils pourraient être en plus grand nombre. Dans l'exemple de réalisation illustré ils sont disposés sur les petits côtés du cadre support 201 rectangulaire. [0110] These 2016 centering studs are here two in number, but there could be more of them. In the illustrated embodiment they are arranged on the short sides of the rectangular support frame 201.
[0111] D'autre part, le cadre support 201 comprend également des orifices de fixation 2017 adaptés chacun au passage d'une vis de serrage pour la fixation du dispositif d'assemblage 20 sur la structure de support 22 de l'afficheur tête haute 2. [0111] On the other hand, the support frame 201 also comprises fixing holes 2017 each adapted to the passage of a tightening screw for fixing the assembly device 20 on the support structure 22 of the head-up display 2.
[0112] Ces orifices de fixation 2017 sont ici au nombre de deux, mais ils pourraient être en nombre plus important. Dans l'exemple de réalisation illustré ils sont disposés sur les petits côtés du cadre support 201 rectangulaire. These 2017 fixing holes are here two in number, but they could be more numerous. In the illustrated embodiment they are arranged on the short sides of the rectangular support frame 201.
[0113] L'équipement du dispositif d'assemblage 20 consiste à positionner l'élément partiellement transparent 18 et l'écran 12 dans leur logement d'encastrement respectif 208 et 204, sur les faces dédiées 2015 et 2014 du cadre support 201, tel qu'illustré sur les figures 4 et 5. [0113] The equipment of the assembly device 20 consists in positioning the partially transparent element 18 and the screen 12 in their respective recessed housing 208 and 204, on the dedicated faces 2015 and 2014 of the support frame 201, such as shown in Figures 4 and 5.
[0114] Pour cela, la plaque d'élément partiellement transparent 18 est emboitée ou encliquetée dans son logement d'encastrement 208 en exerçant une force écartant les deux ergots de verrouillage 2032 des languettes d'encliquetage 2031. [0114] For this, the partially transparent element plate 18 is fitted or snapped into its recessed housing 208 by exerting a force separating the two locking lugs 2032 from the snap tabs 2031.
[0115] Deux des côtés de sa face destinée à entrer en contact avec l'écran 12 viennent en appui contre les parties de plan 209a et 209b du plan d'appui 209 ; et par l'élasticité des languettes d'encliquetage 2031, leurs ergots de verrouillage 2032 viennent se positionner en regard de la face opposée de l'élément partiellement transparent 18 pour assurer son serrage (figure 4). Two of the sides of its face intended to come into contact with the screen 12 bear against the plane parts 209a and 209b of the support plane 209; and by the elasticity of the latching tabs 2031, their locking lugs 2032 are positioned facing the opposite face of the partially transparent element 18 to ensure its tightening (FIG. 4).
[0116] Le contour 208a du logement d'encastrement 208, qui correspond au contour de l'élément partiellement transparent 18, assure un verrouillage de ce dernier sur le dispositif d'assemblage 20 sans possibilité de mouvement. En situation, on évite ainsi que l'élément partiellement transparent 18 glisse sous l'effet des vibrations. The outline 208a of the mounting housing 208, which corresponds to the outline of the partially transparent element 18, ensures locking of the latter on the assembly device 20 without the possibility of movement. In position, this prevents the partially transparent element 18 from slipping under the effect of vibrations.
[0117] De son côté, l'écran 12 est également emboité ou encliqueté dans son logement d'encastrement 204 en exerçant une force écartant les quatre ergots de verrouillage 2022 des languettes d'encliquetage 2021. Eventuellement, le côté de l'écran 12 opposé à la connectique 12c peut être introduit sous les ergots 2022 des languettes d'encliquetage 2021 en regard, puis une force est appliquée sur le bord opposé de l'écran 12 pour assurer son emboitement complet dans son logement d'encastrement 204. [0117] For its part, the screen 12 is also nested or snapped into its recessed housing 204 by exerting a force separating the four locking lugs 2022 from the snap tabs 2021. Optionally, the side of the screen 12 opposed to connectors 12c can be introduced under the lugs 2022 of the snap tabs 2021 opposite, then a force is applied to the opposite edge of the screen 12 to ensure its complete fitting into its recessed housing 204.
[0118] Deux des côtés de la face de l'écran 12 destinée à entrer en contact avec l'élément partiellement transparent 18 viennent en appui contre les parties de plan 206a et 206b du plan d'appui 206 ; et par l'élasticité des languettes d'encliquetage 2021, leurs ergots de verrouillage 2022 viennent se positionner en regard de la face opposée de l'écran 12 pour assurer son serrage (figure 5). Two of the sides of the face of the screen 12 intended to come into contact with the partially transparent element 18 bear against the plane parts 206a and 206b of the support plane 206; and by the elasticity of the latching tongues 2021, their locking lugs 2022 are positioned facing the opposite face of the screen 12 to ensure its tightening (FIG. 5).
[0119] Le contour 205 du logement d'encastrement 204, qui correspond au contour de l'écran 12, assure un verrouillage de ce dernier sur le dispositif d'assemblage 20 sans possibilité de mouvement. En situation, on évite ainsi que l'écran 12 glisse sous l'effet des vibrations. The outline 205 of the mounting housing 204, which corresponds to the outline of the screen 12, ensures locking of the latter on the assembly device 20 without the possibility of movement. In situation, this prevents the screen 12 from slipping under the effect of vibrations.
[0120] Comme on peut le voir sur la figure 5, lorsque l'écran 12 est correctement positionné dans son logement d'encastrement 204, une partie de sa connectique 12c passe au travers de l'échancrure 207 du cadre support 201. As can be seen in Figure 5, when the screen 12 is correctly positioned in its recessed housing 204, part of its connectors 12c passes through the notch 207 of the support frame 201.
[0121] Les plans d'appui 206 et 209 sont situés dans le même plan et ainsi conçus de telle manière que lorsque l'écran 12 et l'élément partiellement transparent 18 sont positionnés sur le dispositif d'assemblage 20, le contact entre eux soit direct et parfait (c'est-à-dire que leurs faces en regard soit parfaitement appliquées l'une contre l'autre). [0121] The support planes 206 and 209 are located in the same plane and thus designed in such a way that when the screen 12 and the partially transparent element 18 are positioned on the assembly device 20, the contact between them is direct and perfect (that is to say that their facing faces are perfectly applied one against the other).
[0122] Les moyens de fixation 202 et 203 sont conçus de sorte qu'ils serrent efficacement l'écran 12 et l'élément partiellement transparent 18. [0122] The fixing means 202 and 203 are designed so that they effectively clamp the screen 12 and the partially transparent element 18.
[0123] On obtient ainsi un sous-ensemble compact formé du dispositif d'assemblage 20 équipé de l'écran 12 et de l'élément partiellement transparent 18, ces deux derniers éléments étant en contact serré et sûr. A compact sub-assembly is thus obtained formed of the assembly device 20 equipped with the screen 12 and the partially transparent element 18, these last two elements being in tight and secure contact.
[0124] A noter que d'autres types de films, lames ou plaques peuvent être associés à l'écran 12 et à l'élément partiellement transparent 18, comme par exemple des films polarisants (polariseurs réflectifs installés sur la face arrière de l'écran 12 côté source de lumière 11 pour recycler la lumière du rétroéclairage) ou des films infrarouges (films infrarouges réfléchissants mis sur la face de l'écran 12 du côté du système optique 6 pour renvoyer par réflexion le rayonnement infrarouge du soleil qui s'introduit à l'intérieur de l'afficheur tête haute). Note that other types of films, blades or plates can be associated with the screen 12 and with the partially transparent element 18, such as for example polarizing films (reflective polarizers installed on the rear face of the screen 12 on the light source 11 side to recycle the light from the backlight) or infrared films (reflecting infrared films placed on the face of the screen 12 on the side of the optical system 6 to send back by reflection the infrared radiation of the sun which enters inside the head-up display).
[0125] Dans ce cas les moyens de fixation 202 et 203 seront adaptés en conséquence, pour obtenir un serrage optimal des différents éléments constitutifs de l'empilage. [0126] Le dispositif d'assemblage 20 équipé de l'écran 12 et de l'élément partiellement transparent 18 est fixé sur la structure de support 22 de l'afficheur tête haute 2 de la manière illustrée sur la figure 6. [0125] In this case, the fixing means 202 and 203 will be adapted accordingly, to obtain optimum clamping of the various constituent elements of the stack. The assembly device 20 equipped with the screen 12 and the partially transparent element 18 is fixed to the support structure 22 of the head-up display 2 in the manner illustrated in FIG. 6.
[0127] Comme précisé ci-dessus, la structure de support 22 fait partie intégrante du dispositif de génération d'image 4 ; et elle peut faire partie du boitier 8 de l'afficheur tête haute 2, ou être intégrée dans ce boitier 8. As specified above, the support structure 22 is an integral part of the image generation device 4; and it can be part of the box 8 of the head-up display 2, or be integrated into this box 8.
[0128] De préférence cette structure de support 22 consiste en un dissipateur thermique, ou est relié thermiquement à un dissipateur thermique dédié, afin de bien assurer la fonction de dissipation thermique depuis le centre de l'écran 12. [0128] Preferably, this support structure 22 consists of a heat sink, or is thermally connected to a dedicated heat sink, in order to ensure the heat dissipation function from the center of the screen 12.
[0129] Dans le mode de réalisation illustré sur la figure 6 la structure de support 22 consiste en une paroi du boitier 8. In the embodiment illustrated in Figure 6 the support structure 22 consists of a wall of the box 8.
[0130] Cette structure support 22 comporte une fenêtre 23 délimitée par un pourtour de fenêtre 24 sur lequel est fixé le dispositif d'assemblage 20. This support structure 22 comprises a window 23 delimited by a window rim 24 on which the assembly device 20 is fixed.
[0131] Le pourtour de fenêtre 24 comprend des orifices d'encastrement 24a dans lesquels viennent s'encastrer les tenons de centrage 2016 du cadre support 201. Il comprend également des orifices de fixation 24b pour la fixation du cadre support 201 au moyen de vis de serrage 25. Ces orifices de fixation 24b peuvent être taraudés pour éviter l'utilisation d'un écrou de verrouillage. [0131] The periphery of the window 24 includes mounting holes 24a in which the centering studs 2016 of the support frame 201 are fitted. It also includes mounting holes 24b for fixing the support frame 201 by means of screws clamping 25. These fixing holes 24b can be tapped to avoid the use of a locking nut.
[0132] Le cas échéant, en fonction des besoins, les vis de serrage 25 peuvent être prévues suffisamment longues pour assembler également le réflecteur 13 depuis l'extérieur du boitier 8. If necessary, depending on the needs, the clamping screws 25 can be provided long enough to also assemble the reflector 13 from the outside of the box 8.
[0133] Pour assurer une bonne dissipation thermique, le boitier 8 (et donc la structure de support 22) est de préférence réalisé en un matériau de conductivité thermique supérieure ou égale à 15W/m.K. De manière à lui conférer une bonne rigidité le boitier 8 peut être réalisé en métal (aluminium, magnésium, acier, etc.). To ensure good heat dissipation, the box 8 (and therefore the support structure 22) is preferably made of a material with a thermal conductivity greater than or equal to 15 W/m.K. In order to give it good rigidity, the box 8 can be made of metal (aluminum, magnesium, steel, etc.).
[0134] Une fois le dispositif d'assemblage 20 correctement positionné, la partie active 12a de l'écran 12 se situe en regard de la fenêtre 23. Once the assembly device 20 is correctly positioned, the active part 12a of the screen 12 is located opposite the window 23.
[0135] Le dispositif d'assemblage 20 permet ainsi de centrer l'écran 12et l'élément partiellement transparent 18 par rapport à leur environnement ; il permet également d'assembler l'écran 12, l'élément partiellement transparent 18 et aussi des éventuels films complémentaires, et de garantir le bon contact entre eux. [0136] Le dispositif d'assemblage 20 est fixé sur la structure de support 22 en fonction de la contrainte thermique que l'on souhaite gérer. The assembly device 20 thus makes it possible to center the screen 12 and the partially transparent element 18 with respect to their environment; it also makes it possible to assemble the screen 12, the partially transparent element 18 and also any additional films, and to guarantee good contact between them. The assembly device 20 is fixed to the support structure 22 depending on the thermal stress that is to be managed.
[0137] Dans un premier cas, pour une gestion de la contrainte thermique de la source de lumière 11, on propose de placer l'élément partiellement transparent 18 entre cette source de lumière 11 et l'écran 12. In a first case, for a management of the thermal stress of the light source 11, it is proposed to place the partially transparent element 18 between this light source 11 and the screen 12.
[0138] Si par convention la structure de support 22 comprend une face amont, orientée du côté de la source de lumière 11, et une face aval, orientée du côté opposé à cette source de lumière 11, alors, comme illustré sur la figure 7, le dispositif d'assemblage 20 qui supporte l'écran 12 et l'élément partiellement transparent 18, peut être fixé sur la face aval de la structure de support 22, avec l'élément partiellement transparent 18 en contact avec ladite structure de support 22 et orienté en direction de la source de lumière 11. If by convention the support structure 22 comprises an upstream face, oriented on the side of the light source 11, and a downstream face, oriented on the side opposite to this light source 11, then, as illustrated in Figure 7 , the assembly device 20 which supports the screen 12 and the partially transparent element 18, can be fixed on the downstream face of the support structure 22, with the partially transparent element 18 in contact with said support structure 22 and oriented towards the light source 11.
[0139] Dans cette configuration le dispositif d'assemblage 20 est fixé à l'intérieur du boitier 8, avec l'élément partiellement transparent 18 placé du côté de la face arrière de l'écran 12 afin qu'il soit en face de la source de lumière 11. In this configuration the assembly device 20 is fixed inside the box 8, with the partially transparent element 18 placed on the side of the rear face of the screen 12 so that it faces the light source 11.
[0140] Dans un second cas, pour favoriser la gestion thermique de la contrainte due à l'ensoleillement focalisé sur l'écran 12 (gestion thermique du flux solaire), on propose de placer l'élément partiellement transparent 18 du côté du système optique 6.In a second case, to promote the thermal management of the stress due to sunlight focused on the screen 12 (thermal management of the solar flux), it is proposed to place the partially transparent element 18 on the side of the optical system 6.
[0141] Alors, comme illustré sur la figure 8, le dispositif d'assemblage 20 qui supporte l'écran 12 et l'élément partiellement transparent 18, peut être fixé sur la face amont de la structure de support 22, avec l'élément partiellement transparent 18 en contact avec ladite structure de support 22 et orienté à l'opposé de la source de lumière 11. [0141] Then, as illustrated in Figure 8, the assembly device 20 which supports the screen 12 and the partially transparent element 18, can be fixed on the upstream face of the support structure 22, with the element partially transparent 18 in contact with said support structure 22 and oriented away from the light source 11.
[0142] Dans cette configuration le dispositif d'assemblage 20 est fixé à l'extérieur du boitier 8, avec l'élément partiellement transparent 18 placé du côté de la face avant de l'écran 12 afin qu'il soit en face de la lumière solaire. [0142] In this configuration, the assembly device 20 is fixed to the outside of the box 8, with the partially transparent element 18 placed on the side of the front face of the screen 12 so that it faces the solar light.

Claims

Revendications Claims
[Revendication 1] Dispositif d'assemblage (20) adapté pour assembler un écran (12) comprenant une partie active centrale (12a) et un élément partiellement transparent (18), avec une face de contact dudit écran (12) plaquée contre une face de contact dudit élément partiellement transparent (18), caractérisé en ce qu'il comprend un cadre support (201) muni d'une ouverture centrale (2011) adaptée au positionnement de ladite partie active centrale (12a) dudit écran (12), lequel cadre support (201) comprend des moyens de fixation (202) dudit écran (12), et des moyens de fixation (203) dudit élément partiellement transparent (18). [Claim 1] Assembly device (20) suitable for assembling a screen (12) comprising a central active part (12a) and a partially transparent element (18), with a contact face of said screen (12) pressed against a contact of said partially transparent element (18), characterized in that it comprises a support frame (201) provided with a central opening (2011) suitable for positioning said central active part (12a) of said screen (12), which support frame (201) comprises fixing means (202) of said screen (12), and fixing means (203) of said partially transparent element (18).
[Revendication 2] Dispositif d'assemblage (20) selon la revendication 1, caractérisé en ce que ledit cadre support (201) comprend : [Claim 2] Assembly device (20) according to claim 1, characterized in that said support frame (201) comprises:
- une face de réception d'écran (2014) munie d'un plan d'appui d'écran (206) contre lequel ladite face de contact dudit écran (12) est destinée à venir prendre appui, et - a screen receiving face (2014) provided with a screen support plane (206) against which said contact face of said screen (12) is intended to bear, and
- une face de réception d'élément partiellement transparent (2015), opposée à ladite face de réception d'écran (2014), laquelle face de réception d'élément partiellement transparent (2015) est munie d'un plan d'appui d'élément partiellement transparent (209), contre lequel ladite face de contact dudit élément partiellement transparent (18) est destinée à venir prendre appui, lequel plan d'appui d'élément partiellement transparent (209) est situé dans le même plan que ledit plan d'appui d'écran (206). - a partially transparent element receiving face (2015), opposite to said screen receiving face (2014), which partially transparent element receiving face (2015) is provided with a support plane of partially transparent element (209), against which said contact face of said partially transparent element (18) is intended to bear, which partially transparent element support plane (209) is located in the same plane as said plane of screen support (206).
[Revendication 3] Dispositif d'assemblage (20) selon la revendication 2, caractérisé en ce que ladite face de réception d'écran (2014) comprend lesdits moyens de fixation (202) dudit écran (12), et en ce que ladite face de réception d'élément partiellement transparent (2015) comprend lesdits moyens de fixation (203 dudit élément partiellement transparent (18). [Claim 3] Assembly device (20) according to claim 2, characterized in that said screen-receiving face (2014) comprises said fixing means (202) of said screen (12), and in that said face partially transparent element receiving (2015) comprises said fastening means (203 of said partially transparent element (18).
[Revendication 4] Dispositif d'assemblage (20) selon l'une quelconque des revendications 2 ou 3, caractérisé en ce que ledit plan d'appui d'écran (206) est défini par deux parties de plan (206a, 206b) en opposition disposées selon un premier axe (X), et en ce que ledit plan d'appui d'élément partiellement transparent (209) est défini par deux parties de plan (209a, 209b) en opposition disposées selon un second axe (Y) perpendiculaire audit premier axe (X). [Claim 4] Assembly device (20) according to any one of Claims 2 or 3, characterized in that the said screen support plane (206) is defined by two plane parts (206a, 206b) opposition arranged along a first axis (X), and in that said partially transparent element support plane (209) is defined by two plane parts (209a, 209b) in opposition arranged along a second axis (Y) perpendicular to said first axis (X).
[Revendication 5] Dispositif d'assemblage selon l'une quelconque des revendications 1 à 4, caractérisé en ce que ledit cadre support (201) comprend (a) un logement d'encastrement (208) pour ledit élément partiellement transparent (18), dont le contour (208a) correspond, au jeu près, au contour dudit élément partiellement transparent (18), et (b) un logement d'encastrement (204) pour ledit écran (12), dont le contour (205) correspond, au jeu près, au contour dudit écran (12). [Claim 5] Assembly device according to any one of Claims 1 to 4, characterized in that the said support frame (201) comprises (a) an embedding housing (208) for the said partially transparent element (18), whose contour (208a) corresponds, except for clearance, to the contour of said partially transparent element (18), and (b) a mounting housing (204) for said screen (12), whose contour (205) corresponds, to the game close to the contour of said screen (12).
[Revendication 6] Dispositif d'assemblage (20) selon l'une quelconque des revendications 1 à 5, caractérisé en ce que lesdits moyens de fixation (202) dudit écran (12), et lesdits moyens de fixation (203) dudit élément partiellement transparent (18), consistent en des moyens d'emboitage élastique du type à languette d'encliquetage (2021, 2031) munie d'un ergot de verrouillage (2022, 2032). [Claim 6] Assembly device (20) according to any one of claims 1 to 5, characterized in that said fixing means (202) of said screen (12), and said fixing means (203) of said partially transparent (18), consist of elastic interlocking means of the snap-in tab type (2021, 2031) provided with a locking lug (2022, 2032).
[Revendication 7] Dispositif d'assemblage (20) selon l'une quelconque des revendications 1 à 6, caractérisé en ce que ledit cadre support (201) comprend au moins deux tenons de centrage (2016) ménagés en saillie à partir de ladite face de réception d'élément partiellement transparent (2015), lesquels tenons de centrage (2016) sont adaptés à venir coopérer avec des orifices d'encastrement (24a) ménagés sur une structure de support (22). [Claim 7] Assembly device (20) according to any one of claims 1 to 6, characterized in that said support frame (201) comprises at least two centering tenons (2016) projecting from said face for receiving a partially transparent element (2015), which centering studs (2016) are adapted to cooperate with mounting holes (24a) provided on a support structure (22).
[Revendication 8] Dispositif d'assemblage (20) selon l'une quelconque des revendications 1 à 7, caractérisé en ce que ledit cadre support (201) comprend au moins deux orifices de fixation (2017) adaptés chacun au passage d'une vis de serrage (25) pour sa fixation sur une structure de support (22). [Claim 8] Assembly device (20) according to any one of claims 1 to 7, characterized in that said support frame (201) comprises at least two fixing holes (2017) each adapted for the passage of a screw clamp (25) for fixing it to a support structure (22).
[Revendication 9] Dispositif de génération d'image (4) comprenant une source de lumière (11) produisant un faisceau lumineux (L) et un écran (12) traversé par le faisceau lumineux (L) et conçu pour modifier le faisceau lumineux (L) de manière à former une image, lequel dispositif de génération d'image (4) comprend également un élément partiellement transparent (18) traversé par le faisceau lumineux (L) et agencé pour limiter réchauffement dudit écran (12), et lequel dispositif de génération d'image (4) comprend encore une structure de support (22) munie d'une fenêtre (23) délimitée par un pourtour de fenêtre (24), sur lequel pourtour de fenêtre (24) est fixé un dispositif d'assemblage (20) selon l'une quelconque des revendications 1 à 8, lequel dispositif d'assemblage (20) supporte ledit écran (12) et ledit élément partiellement transparent (18). [Claim 9] Image generating device (4) comprising a light source (11) producing a light beam (L) and a screen (12) traversed by the light beam (L) and adapted to modify the light beam ( L) so as to form an image, which image generating device (4) also comprises a partially transparent element (18) through which the light beam (L) passes and arranged to limit heating of said screen (12), and which device image generator (4) further comprises a support structure (22) provided with a window (23) delimited by a window surround (24), on which window surround (24) is fixed an assembly device (20) according to any one of claims 1 to 8, which assembly device (20) supports said screen (12) and said partially transparent element (18).
[Revendication 10] Dispositif de génération d'image (4) selon la revendication 9, comprenant un cadre support (201) selon la revendication 7, et une structure de support (22) munie d'une fenêtre (23) délimitée par un pourtour de fenêtre (24) comprenant des orifices d'encastrement (24a) dans lesquels viennent s'encastrer les tenons de centrage (2016) dudit cadre support (201). [Claim 10] An image generating device (4) according to claim 9, comprising a support frame (201) according to claim 7, and a support structure (22) provided with a window (23) delimited by a window perimeter (24) comprising recessed orifices (24a) in which the centering tenons (2016) of said support frame (201) fit.
[Revendication 11] Dispositif de génération d'image (4) selon l'une quelconque des revendications 9 ou 10, comprenant un cadre support (201) selon la revendication 8, et une structure de support (22) munie d'une fenêtre (23) délimitée par un pourtour de fenêtre (24) comprenant des orifices de fixation (24b) pour la fixation dudit cadre support (201) au moyen de vis de serrage (25). [Claim 11] An image generating device (4) according to any one of claims 9 or 10, comprising a support frame (201) according to claim 8, and a support structure (22) provided with a window ( 23) delimited by a window rim (24) comprising fixing holes (24b) for fixing said support frame (201) by means of clamping screws (25).
[Revendication 12] Dispositif de génération d'image (4) selon l'une quelconque des revendications 9 à[Claim 12] An image generating device (4) according to any one of claims 9 to
11, dans lequel ladite structure de support (22) consiste en un dissipateur thermique, ou est relié thermiquement à un dissipateur thermique. 11, wherein said support structure (22) consists of a heat sink, or is thermally connected to a heat sink.
[Revendication 13] Dispositif de génération d'image (4) selon l'une quelconque des revendications 9 à[Claim 13] An image generating device (4) according to any one of claims 9 to
12, dans lequel ladite structure de support (22) comprend une face amont, orientée du côté de ladite source de lumière (11), et une face aval, orientée du côté opposé à ladite source de lumière (11), ledit dispositif d'assemblage (20) qui supporte ledit écran (12) et ledit élément partiellement transparent (18), étant fixé sur ladite face aval de ladite structure de support (22), avec ledit élément partiellement transparent (18) orienté en direction de ladite source de lumière12, wherein said support structure (22) comprises an upstream face, oriented on the side of said light source (11), and a downstream face, oriented on the side opposite to said light source (11), said device for assembly (20) which supports said screen (12) and said partially transparent element (18), being fixed on said downstream face of said support structure (22), with said partially transparent element (18) oriented in the direction of said source of light
(11). (11).
[Revendication 14] Dispositif de génération d'image (4) selon l'une quelconque des revendications 9 à[Claim 14] An image generating device (4) according to any one of claims 9 to
12, dans lequel ladite structure de support (22) comprend une face amont, orientée du côté de ladite source de lumière (11), et une face aval, orientée du côté opposé à ladite source de lumière (11), ledit dispositif d'assemblage (20) qui supporte ledit écran (12) et ledit élément partiellement transparent (18) , étant fixé sur ladite face amont de ladite structure de support (22), avec ledit élément partiellement transparent (18) orienté dans la direction opposée à ladite source de lumière (11). 12, wherein said support structure (22) comprises an upstream face, oriented on the side of said light source (11), and a downstream face, oriented on the side opposite to said light source (11), said device for assembly (20) which supports said screen (12) and said partially transparent element (18), being fixed on said upstream face of said support structure (22), with said partially transparent element (18) oriented in the opposite direction to said light source (11).
[Revendication 15] Afficheur tête haute (2), par exemple destiné à équiper un véhicule automobile, comprenant un dispositif de génération d'image (4) selon l'une quelconque des revendications 9 à 14, un système optique (6) adapté à transmettre en direction d'une lame partiellement transparente (7) les images générées par ledit dispositif de génération d'image (4). [Claim 15] Head-up display (2), for example intended to be fitted to a motor vehicle, comprising an image-generating device (4) according to any one of claims 9 to 14, an optical system (6) adapted to transmitting in the direction of a partially transparent slide (7) the images generated by said image generating device (4).
Afficheur tête haute (2) selon la revendication 15, comprenant un boitier de protection (8), lequel boitier de protection (8) comprend ladite structure de support (22) munie d'une fenêtre (23) délimitée par un pourtour de fenêtre (24), sur lequel pourtour de fenêtre (24) est fixé ledit dispositif d'assemblage (20) supportant ledit écran (12) et ledit élément partiellement transparent (18). | Head-up display (2) according to claim 15, comprising a protective casing (8), which protective casing (8) comprises said support structure (22) provided with a window (23) delimited by a window surround (24), on which window surround (24) is fixed said assembly device (20) supporting said screen (12) and said partially transparent element (18). |
EP21799042.3A 2020-10-26 2021-10-26 Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device Pending EP4232866A1 (en)

Applications Claiming Priority (2)

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FR2010969A FR3115611B1 (en) 2020-10-26 2020-10-26 Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device
PCT/EP2021/079693 WO2022090233A1 (en) 2020-10-26 2021-10-26 Assembly device suitable for assembling a screen with a partially transparent element and head-up display comprising such a device

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JP2009089304A (en) * 2007-10-03 2009-04-23 Panasonic Corp Portable terminal device
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WO2017149562A1 (en) * 2016-03-01 2017-09-08 パナソニックＩｐマネジメント株式会社 Liquid crystal display device
EP3663827A1 (en) * 2018-12-03 2020-06-10 Valeo Comfort and Driving Assistance Head-up display
CN111190321A (en) * 2020-03-09 2020-05-22 南华智能精密机器(深圳)有限公司 Self-heat-conducting light valve module and light valve heat dissipation device

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