• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a laminated glazing for use as a head-up display system screen, comprising: - two sheets of glass (1, 2), - a viscoelastic plastic interlayer (3) disposed between the two sheets of glass (1). 2), the interlayer comprising at least one viscoelastic plastic material layer (3) with vibroacoustic damping properties and the insert having a wedge-shaped decreasing cross section from the top to the bottom of the laminated glazing, in wherein the spacer is such that the resonant frequency f2 of the second resonance mode of a 25 mm x 300 mm laminated glazing bar made of two glass sheets 2.1 mm thick each between which is incorporated intermediate, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor η2 of the second resonance mode of the same Bar, determined by MIM under the same conditions, is greater than or equal to 0.25. The invention makes it possible to provide vibro-acoustic damping properties to a laminated glazing intended to be used as a head-up display system screen and allows a reduction in the thickness of the glass sheets without degradation of the vibration damping properties. -acoustiques.
    公开号:FR3013630A1
    申请号:FR1361723
    申请日:2013-11-27
    公开日:2015-05-29
    发明作者:Corinne Payen；David Fournier
    申请人:Saint Gobain Glass France SAS；Compagnie de Saint Gobain SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a laminated glazing intended to be used as a head-up display screen (called HUD or Head Up Display). FIG. Head-up display systems are useful in all types of vehicles, especially motor vehicles. The head-up display systems display information projected on a laminated glazing, which is reflected towards the driver or the observer. These systems allow in particular to give information to the driver of the vehicle without the driver away from the field of vision in front of the vehicle, to ensure safe driving. The driver then perceives a virtual image that is at a distance behind the windshield. If a conventional laminated glazing is used for such a system, the driver observes a dual image: a first image reflected by the surface of the windshield facing the interior of the habitable and a second image reflected by the outer surface of the pare -brise, these two images being slightly offset relative to each other. This gap can disrupt the vision of information. To overcome this problem, it is possible to use a laminated windshield formed of two sheets of glass and a polyvinyl butyral interlayer (PVB) whose two outer faces are not parallel but wedge-shaped, so that the image projected by a display source and reflected by the face of the windshield facing the cockpit is almost superimposed on the same image from the same source reflected by the face of the windshield facing outward. To achieve this wedge-shaped laminated glazing, an interlayer sheet is used, the thickness of which decreases from the upper edge of the glazing to the lower edge. In addition, among all the qualities contributing to comfort in modern means of transport such as trains and cars, silence has become decisive. Acoustic comfort has been improved for several years now, by treating noises, such as engine, rolling or suspension noises, whether at their origin or during their propagation over the air or in solids, by means of for example absorbent coatings, elastomer connecting piece. Vehicle shapes have also been modified to improve air penetration and reduce turbulence which is itself a source of noise. And in recent years, we have been studying the role that glazing could play in improving acoustic comfort, particularly laminated glazing with plastic interlayer films. Laminated glazing also has other advantages such as eliminating the risk of splashing fragments in case of sudden breakage, constitute a burglar-proofing device. It has been demonstrated that the use of standard plastic films in laminated glazings is not suitable for improving acoustic comfort. Specific plastic films were developed which had damping properties to improve acoustic comfort. Furthermore, in existing windscreens, the thickness of the glass sheet intended to be turned towards the outside of the vehicle is generally 2.1 mm and the thickness of the glass sheet intended to be turned towards the vehicle interior is usually 1.6 mm. However, there is a trend towards reducing vehicle weight in order to reduce fuel consumption and CO2 emissions. One way is to offer lighter automotive windows. One solution for reducing the weight of the glazings is to reduce the thickness of the glass sheets. However, this reduction in thickness causes degradation of the acoustic properties of the laminated glazing.
    [0002] There is therefore a need for a laminated glazing intended to be used as a head-up display screen, the laminated glazing also having vibro-acoustic damping properties and which allows a reduction in the thickness of the glass sheets. without degradation of vibro-acoustic damping properties.
    [0003] For this, the invention provides a laminated glazing for use as a head-up display system screen, comprising: - two sheets of glass, -3- - a viscoelastic plastic interlayer disposed between the two sheets of glass, the interlayer comprising at least one layer of viscoelastic plastic material with vibroacoustic damping properties and the spacer having a wedge-shaped decreasing cross-section from the top to the bottom of the laminated glazing, wherein the interlayer is such that the resonance frequency f2 of the second resonance mode of a 25 mm x 300 mm laminated glazing bar composed of two 2.1 mm thick glass sheets between which the spacer is incorporated, determined by a measurement of the mechanical impedance Mole at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the same barrel water, determined by MIM under the same conditions, is greater than or equal to 0.25 a viscoelastic plastic interlayer intended to be incorporated between two sheets of glass to form a laminated glazing unit having vibroacoustic damping properties, the interlayer comprising at least less a layer of viscoelastic plastic material with vibroacoustic damping properties, the interlayer being such that the resonant frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm composed of two sheets 2.1 mm thick glass between which is inserted the spacer, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor I12 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. According to another feature, the layer is based on polyvinylbutyral and plasticizer. According to another particularity, the glass sheets are curved. According to another feature, the resonant frequency f2 is between 800 and 900 Hz, preferably between 800 Hz and 850 Hz. According to another feature, the loss factor 1I2 is greater than 0.30.
    [0004] According to another feature, the interlayer further comprises two outer layers of standard PVB, the layer being between the two outer layers.
    [0005] According to another particularity, only one of the two outer layers has a cross-section decreasing wedge-shaped from top to bottom of the laminated glazing, the viscoelastic plastic material layer with vibro-acoustic damping properties and the other layer external having a constant cross section from the top to the bottom of the laminated glazing. According to another feature, the two outer layers have a cross-section decreasing wedge-shaped from the top to the bottom of the laminated glazing, the layer of viscoelastic plastic material with vibro-acoustic damping properties having a constant cross-section from the top to the bottom. bottom of the laminated glazing. According to another feature, the measurement of the mechanical impedance is performed at least one month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled at least 1 month after the manufacture of the interlayer.
    [0006] The invention also relates to a glazing unit comprising: - one of the glass sheets has a thickness of between 0.5 mm and 2.6 mm, - one of the glass sheets has a thickness of between 0.5 mm and 1.6 mm , the total thickness of the glass sheets being strictly less than 3.7 mm. The invention also relates to a motor vehicle comprising a glazing unit described above, the glass sheet having a thickness of between 0.5 mm and 2.6 mm being turned towards the outside of the vehicle and the thick glass sheet between 0.5 mm and 1.6 mm being turned towards the inside of the vehicle.
    [0007] The invention also relates to a use of the glazing described above as a motor vehicle windshield. Other features and advantages of the invention will now be described with reference to the drawings, in which: FIG. 1 represents a curve of sound insulation as a function of frequency, measured on three windscreens; - Figure 2 shows a sectional view of a glazing according to the invention.
    [0008] The invention relates to a laminated glazing intended to be used as a head-up display system screen, comprising two glass sheets and a viscoelastic plastic interlayer disposed between the two sheets of glass, the interlayer comprising at least one layer of material viscoelastic plastic with vibro-acoustic damping properties and the insert having a cross-section decreasing wedge-shaped from top to bottom of the laminated glazing. The spacer is such that the resonance frequency f2 of the second resonance mode of a laminated glazing bar with a surface area of 25 mm x 300 mm consists of two 2.1 mm thick glass sheets between which is incorporated the interlayer, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940 (with a single difference in the thickness of the glass sheets of the bar which is 2.1 mm instead of 4 mm), is between 760 Hz and 1000 Hz and the loss factor 1I2 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. The inventors have demonstrated, as will be seen below, that an interlayer comprising these features makes it possible to obtain a thin laminated glazing with acoustic performances equivalent to or even greater than those of a laminated glazing unit with conventional glass thicknesses. incorporating an intercalar with improved acoustic properties known. Figure 2 shows a sectional view of a glazing unit according to the invention. The glazing comprises two sheets of glass 1, 2 between which is inserted the interlayer according to the invention. The interlocking of the interlayer with the glass sheets is achieved by known means, for example by stacking the glass sheets and the interlayer and by passing the assembly in an autoclave. The glass sheet 1 of the glazing is intended to be turned towards the outside of the vehicle while the glass sheet 2 is intended to be turned towards the inside of the vehicle. The glass sheet 1 is preferably thicker than the glass sheet 2 so that the glazing allows better protection against external attacks (inclement weather, projection of chippings, etc.). Indeed, the thicker the glass, the more mechanically resistant it is. However, the thicker the glass, the heavier it is. We must therefore find a compromise between the mechanical resistance and the weight of the glazing. Thus, the thickness of the glass sheet 1 is for example between 0.5 mm and 2.6 mm, preferably between 1.4 and 2.0 mm and the thickness of the glass sheet 2 is for example between 0.5 mm and 1.6 mm, preferably between 1.1 and 1.5 mm.
    [0009] In existing glazing, the thickness of the glass sheet 1 is in general 2.1 mm and the thickness of the glass sheet 2 is generally 1.6 mm, ie a total thickness of 3.7 mm. The glazing according to the present invention comprises a total glass thickness strictly less than 3.7 mm, preferably less than or equal to 3.2 mm.
    [0010] Preferably, according to the invention, the thickness of the glass sheet 1 is 1.8 mm and the thickness of the glass sheet 2 is 1.4 mm in order to limit the weight of the glazing, which allows to reduce the fuel consumption of a vehicle equipped with such a glazing unit. It also makes it easier to handle the glazing and save material.
    [0011] The glazing according to the invention may also have a glass sheet 1 having a thickness of 1.6 mm and a glass sheet 2 having a thickness of 1.2 mm, or a glass sheet 1 having a thickness of 1.4 mm and a thickness of glass sheet 2 1.1 mm thick. The interlayer consists of at least one viscoelastic plastic layer 3 with vibro-acoustic damping properties. It is preferably based on polyvinylbutyral and plasticizer. The rate and the nature of the plasticizer and the degree of acetalization of the polyvinyl butyral make it possible to play in a known manner on the rigidity of a component based on polyvinyl butyral and plasticizer. In the example of Figure 2, the spacer also comprises two layers 4, 5, said outer layers, between which is inserted the layer 3.
    [0012] The outer layers 4, 5 are preferably standard PVB. The layer 3 is less rigid than the outer layers 4, 5 in order to vibrate properly to ensure the desired acoustic damping. Alternatively, the spacer may comprise at least two layers of viscoelastic plastic with vibro-acoustic damping properties, surrounded or not by standard PVB layers. The acoustic characteristics of the interlayer are determined by measuring the mechanical impedance (MIM) at 20 ° C according to ISO 16940 of a laminated glass pane with a surface area of 25 mm x 300 mm composed of two sheets of glass. thickness 2.1 mm (and not 4 mm as recommended in ISO 16940) each between which is incorporated a spacer according to the invention, that is to say a spacer comprising at least one viscoelastic plastic layer with properties vibro-acoustic damping.
    [0013] The MIM makes it possible to determine resonance frequencies and loss factors of the various resonance modes of the laminated glazing bar. The spacer is according to the invention if the resonance frequency f2 of the second resonance mode of the laminated glazing bar determined by MIM is between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the glazing bar. Laminated determined by MIM is greater than or equal to 0.25. Preferably, the resonant frequency f2 is between 800 Hz and 900 Hz, which makes it possible to have improved acoustic performances by degrading less the level of weakening of the laminated glazing before the critical frequency. More preferably, the resonant frequency f2 is between 800 Hz and 850 Hz, which makes it possible to have acoustic performances further improved by further degrading the attenuation level of the laminated glazing before the critical frequency. Preferably, the loss factor 112 is greater than 0.30, which makes it possible to have improved acoustic performances by improving the acoustic damping. The measurement of the mechanical impedance (MIM) is carried out at least 1 month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled at least 1 month after the manufacture of the interlayer. This makes it possible to be sure that the interlayer and the laminated glazing have reached stable states and thus to determine reliable values. Figure 1 shows a curve of sound insulation as a function of frequency, measured on three windshields. The acoustic insulation of a glazing unit accounts for the acoustic performance that can be observed on a vehicle equipped with said glazing. Thus, a first windshield (21-16 known) comprises: - two glass sheets of respective thicknesses 2.1 mm and 1.6 mm, and -8- - an interlayer comprising two outer layers PVB standard and a viscoelastic plastic core layer with vibroacoustic damping properties, the interlayer having a resonance frequency f2 of 675 Hz (± 15 Hz) and a loss factor 112 equal to 0.35 (± 0.03). The first windshield corresponds to a conventional windshield with an interlayer with known acoustic damping properties. The sound insulation curve (represented by diamonds) of the first windshield shows a hollow around 6500 Hz.
    [0014] A second windshield (18-14 known) comprises: - two glass sheets of respective thicknesses 1.8 mm and 1.4 mm, and - an interlayer comprising two outer layers in standard PVB and a central layer of viscoelastic plastic the vibro-acoustic damping properties, the interlayer having a resonance frequency f2 of 675 Hz (± 15 Hz) and a loss factor 112 equal to 0.35 (± 0.03). The second windshield is a thinned windshield with an interlayer identical to that of the first windshield. The acoustic insulation curve (represented by squares) of the second windshield shows a behavior similar to that of the first windshield up to 5000 Hz, but a hollow shifted towards the high frequencies, towards 8000 Hz. The hollow is very troublesome because it implies that this windshield lets airborne sounds at high frequencies that are annoying to the human ear.
    [0015] A third windshield (18-14 invention) comprises: two glass sheets of respective thicknesses 1.8 mm and 1.4 mm, and an interlayer comprising two outer layers of standard PVB and a central layer of viscoelastic plastic the vibro-acoustic damping properties, the interlayer having a resonance frequency f2 of 800 Hz (± 15 Hz) and a loss factor 112 equal to 0.30 (± 0.03). The third windshield is a thinned windshield with a spacer according to the invention. The acoustic insulation curve (represented by triangles) of the third windshield shows a behavior similar to that of the first windshield, with a recentered hollow around 6500 Hz and acoustic insulation values similar to those of the first windshield.
    [0016] The windshield with an interlayer according to the invention therefore makes it possible to compensate for the acoustic degradation associated with the thinning of the glazing. The laminated glazing according to the invention can be used as a windshield for a motor vehicle. In this case, of course, it satisfies all the requirements of United Nations Regulation No. 43 (known as R43) to withstand hard shocks to ensure its mechanical strength. To do this, in the case of an interlayer comprising two outer layers of standard PVB, the thickness of these outer layers 4, 5 is for example adapted in known manner, for example by the patent application FR 09 52567. For that the laminated glazing unit according to the invention can be used as a head-up display system screen, the insert has a cross-section decreasing wedge-shaped from the top to the bottom of the laminated glazing unit. Preferably, only one or both outer layers a / have a cross-section decreasing wedge-shaped from top to bottom of the laminated glazing, the layer 3 of viscoelastic plastic material with vibro-acoustic damping properties having a constant cross section from top to bottom of the laminated window. In addition, the two sheets of glass 1, 2 are curved.
    权利要求:
    Claims (12)
    [0001]
    REVENDICATIONS1. Laminated glazing for use as a head-up display system screen, comprising: - two sheets of glass (1,
    [0002]
    2), - a viscoelastic plastic interlayer (3) disposed between the two glass sheets (1, 2), the interlayer comprising at least one layer (3) of viscoelastic plastic material with vibro-acoustic damping properties and interlayer having a cross-sectional area decreasing in wedge form from the top to the bottom of the laminated glazing, wherein the spacer is such that the resonant frequency f2 of the second resonance mode of a laminated glazing bar having a surface area of 25 mm x 300 mm composed of two 2.1 mm thick sheets of glass between which the spacer is incorporated, determined by a measurement of the mechanical impedance (MIM) at 20 ° C according to ISO 16940, is between 760 Hz and 1000 Hz and the loss factor 112 of the second resonance mode of the same bar, determined by MIM under the same conditions, is greater than or equal to 0.25. 2. laminated glass according to claim 1, wherein the layer (3) is based on polyvinyl butyral and plasticizer.
    [0003]
    3. Laminated glazing according to claim 1 or 2, wherein the glass sheets (1, 2) are curved.
    [0004]
    4. laminated glass according to one of claims 1 to 3, wherein the resonance frequency f2 is between 800 and 900 Hz, preferably between 800 Hz and 850 Hz.
    [0005]
    5. Laminated glazing according to one of claims 1 to 4, wherein the loss factor 112 is greater than 0.30.
    [0006]
    6. laminated glass according to one of claims 1 to 5, further comprising two outer layers (4, 5) PVB standard, the layer (3) being between the two outer layers (4, 5) .- 11-
    [0007]
    Laminated glazing unit according to one of Claims 1 to 6, in which only one of the two outer layers (4, 5) has a cross-section decreasing in wedge-shaped form from the top to the bottom of the laminated glazing, the layer ( 3) viscoelastic plastic material with vibro-acoustic damping properties and the other outer layer having a constant cross section from top to bottom of the laminated glazing.
    [0008]
    8. Laminated glazing according to one of claims 1 to 6, wherein the two outer layers (4, 5) have a cross-section decreasing wedge-shaped from top to bottom of the laminated glazing, the layer (3) material viscoelastic plastic with vibro-acoustic damping properties having a constant cross-section from the top to the bottom of the laminated glazing.
    [0009]
    9. laminated glazing according to one of claims 1 to 8, wherein the measurement of the mechanical impedance is performed at least 1 month after assembly of the laminated glazing bar, the laminated glazing bar having itself been assembled at least 1 month after the manufacture of the interlayer.
    [0010]
    10. laminated glass according to one of claims 1 to 9, wherein: - one of the glass sheets (1, 2) has a thickness of between 0.5 mm and 2.6 mm, - one of the glass sheets ( 1, 2) has a thickness of between 0.5 mm and 1.6 mm, the total thickness of the glass sheets (1, 2) being strictly less than 3.7 mm.
    [0011]
    11. Motor vehicle comprising a glazing unit according to one of claims 1 to 10, the glass sheet thickness between 0.5 mm and 2.6 mm being turned towards the outside of the vehicle and the glass sheet of thickness between 0.5 mm and 1.6 mm being turned towards the inside of the vehicle.
    [0012]
    12. Use of the glazing according to one of claims 1 to 10 as a windshield of a motor vehicle.
    类似技术:
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    CA2652755C|2014-07-29|Acoustic laminated glazing, acoustic interlayer and method for selecting the interlayer for optimal acoustic damping
    EP2432637B1|2018-03-14|Method for the selection of an interlayer for an acoustic attenuator, interlayer for an acoustic attenuator und glazing comprising such an interlayer
    EP2212506B1|2016-03-09|Glazing having improved vibro-acoustic damping behaviour, method of manufacturing such glazing, and method of acoustic protection in a vehicle passenger compartment
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    CA2930240C|2022-01-18|Laminated glass panel intended to be used as a screen of a head-up display system
    CA2686529C|2016-06-28|Acoustic glazing element
    FR3054167A1|2018-01-26|VISCOELASTIC PLASTIC INTERIOR FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERCALAR
    WO2005075955A1|2005-08-18|Glazing with sound insulating property
    FR3017824A1|2015-08-28|PLASTIC AUTOMOTIVE GLAZING WITH VIBRO-ACOUSTIC DAMPING PROPERTY
    同族专利:
    公开号 | 公开日
    CN110001163A|2019-07-12|
    CA2930369A1|2015-06-04|
    CN104853914A|2015-08-19|
    US20160375659A1|2016-12-29|
    WO2015079158A1|2015-06-04|
    MX2016006556A|2016-08-03|
    FR3013630B1|2017-04-28|
    US9770888B2|2017-09-26|
    JP6546171B2|2019-07-17|
    EA201691098A1|2016-09-30|
    EP3074222A1|2016-10-05|
    JP2017500264A|2017-01-05|
    EA031385B1|2018-12-28|
    CA2930369C|2022-01-04|
    KR20160090817A|2016-08-01|
    KR102309793B1|2021-10-08|
    引用文献:
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    US20120094084A1|2010-10-15|2012-04-19|William Keith Fisher|Chemically-strengthened glass laminates|US20170210097A1|2013-11-27|2017-07-27|Saint-Gobain Glass France|Viscoelastic plastic interlayer for vibro-acoustic damping and glazing comprising such an interlayer|
    FR3054167A1|2016-07-19|2018-01-26|Saint-Gobain Glass France|VISCOELASTIC PLASTIC INTERIOR FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERCALAR|KR100591241B1|1997-07-24|2006-10-04|쌩-고벵 글래스 프랑스|Laminated glass windscreen intended to be used at the same time as a hud system reflector|
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    RU2724343C2|2016-03-17|2020-06-23|Сэн-Гобэн Гласс Франс|Composite panel having electrically conductive coating for indicator on windshield|
    FR3054169B1|2016-07-22|2018-08-17|Saint Gobain|VISCOELASTIC PLASTIC INTERIOR FOR VIBRO-ACOUSTIC DAMPING AND GLAZING COMPRISING SUCH AN INTERCALAR|
    JP2020506140A|2017-01-20|2020-02-27|ピッツバーグ グラス ワークス、エルエルシー|Asymmetric glass laminate with high impact resistance|
    US10438575B2|2017-11-20|2019-10-08|Chang Chun Petrochemical Co., Ltd.|Multilayer film, interlayer film comprising the multilayer film and laminated glass and sound-insulating glass laminate comprising the interlayer film|
    CN113400744A|2021-05-25|2021-09-17|福耀玻璃工业集团股份有限公司|Laminated glass and method for producing laminated glass|
    法律状态:
    2015-11-18| PLFP| Fee payment|Year of fee payment: 3 |
    2016-11-24| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-21| PLFP| Fee payment|Year of fee payment: 5 |
    2019-11-28| PLFP| Fee payment|Year of fee payment: 7 |
    2020-11-30| PLFP| Fee payment|Year of fee payment: 8 |
    2021-11-30| PLFP| Fee payment|Year of fee payment: 9 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1361723A|FR3013630B1|2013-11-27|2013-11-27|SHEET GLAZING FOR USE AS A DISPLAY OF HIGH HEAD VISUALIZATION SYSTEM|FR1361723A| FR3013630B1|2013-11-27|2013-11-27|SHEET GLAZING FOR USE AS A DISPLAY OF HIGH HEAD VISUALIZATION SYSTEM|
    US15/039,472| US9770888B2|2013-11-27|2014-11-25|Laminated glazing for use as a head-up display screen|
    CA2930369A| CA2930369C|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system|
    EA201691098A| EA031385B1|2013-11-27|2014-11-25|Laminated glazing for use as a head-up display screen|
    EP14821741.7A| EP3074222A1|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system|
    PCT/FR2014/053026| WO2015079158A1|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system|
    CN201910317476.0A| CN110001163A|2013-11-27|2014-11-25|Laminated glass product as head-up display screen|
    CN201480002530.8A| CN104853914A|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system|
    KR1020167013666A| KR102309793B1|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system|
    JP2016534734A| JP6546171B2|2013-11-27|2014-11-25|Laminated glass panel for use as a screen in a head-up display system|
    MX2016006556A| MX2016006556A|2013-11-27|2014-11-25|Laminated glass panel intended to be used as the screen of a head-up display system.|
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